Initial import of BSD telnet. This will be used to build the kerberised

telnet, and after userland diffs have been merged in, will be used to
build the non-kerberised sources as well. (See unifdef(1) for details)

50 files changed, 27374 insertions, 0 deletions

diff --git a/contrib/telnet/arpa/telnet.h b/contrib/telnet/arpa/telnet.h
new file mode 100644
index 0000000..10155a8
--- /dev/null
+++ b/contrib/telnet/arpa/telnet.h
@@ -0,0 +1,320 @@
+/*
+ * Copyright (c) 1983, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *	@(#)telnet.h	8.2 (Berkeley) 12/15/93
+ */
+
+#ifndef _TELNET_H_
+#define	_TELNET_H_
+
+/*
+ * Definitions for the TELNET protocol.
+ */
+#define	IAC	255		/* interpret as command: */
+#define	DONT	254		/* you are not to use option */
+#define	DO	253		/* please, you use option */
+#define	WONT	252		/* I won't use option */
+#define	WILL	251		/* I will use option */
+#define	SB	250		/* interpret as subnegotiation */
+#define	GA	249		/* you may reverse the line */
+#define	EL	248		/* erase the current line */
+#define	EC	247		/* erase the current character */
+#define	AYT	246		/* are you there */
+#define	AO	245		/* abort output--but let prog finish */
+#define	IP	244		/* interrupt process--permanently */
+#define	BREAK	243		/* break */
+#define	DM	242		/* data mark--for connect. cleaning */
+#define	NOP	241		/* nop */
+#define	SE	240		/* end sub negotiation */
+#define EOR     239             /* end of record (transparent mode) */
+#define	ABORT	238		/* Abort process */
+#define	SUSP	237		/* Suspend process */
+#define	xEOF	236		/* End of file: EOF is already used... */
+
+#define SYNCH	242		/* for telfunc calls */
+
+#ifdef TELCMDS
+char *telcmds[] = {
+	"EOF", "SUSP", "ABORT", "EOR",
+	"SE", "NOP", "DMARK", "BRK", "IP", "AO", "AYT", "EC",
+	"EL", "GA", "SB", "WILL", "WONT", "DO", "DONT", "IAC", 0,
+};
+#else
+extern char *telcmds[];
+#endif
+
+#define	TELCMD_FIRST	xEOF
+#define	TELCMD_LAST	IAC
+#define	TELCMD_OK(x)	((unsigned int)(x) <= TELCMD_LAST && \
+			 (unsigned int)(x) >= TELCMD_FIRST)
+#define	TELCMD(x)	telcmds[(x)-TELCMD_FIRST]
+
+/* telnet options */
+#define TELOPT_BINARY	0	/* 8-bit data path */
+#define TELOPT_ECHO	1	/* echo */
+#define	TELOPT_RCP	2	/* prepare to reconnect */
+#define	TELOPT_SGA	3	/* suppress go ahead */
+#define	TELOPT_NAMS	4	/* approximate message size */
+#define	TELOPT_STATUS	5	/* give status */
+#define	TELOPT_TM	6	/* timing mark */
+#define	TELOPT_RCTE	7	/* remote controlled transmission and echo */
+#define TELOPT_NAOL 	8	/* negotiate about output line width */
+#define TELOPT_NAOP 	9	/* negotiate about output page size */
+#define TELOPT_NAOCRD	10	/* negotiate about CR disposition */
+#define TELOPT_NAOHTS	11	/* negotiate about horizontal tabstops */
+#define TELOPT_NAOHTD	12	/* negotiate about horizontal tab disposition */
+#define TELOPT_NAOFFD	13	/* negotiate about formfeed disposition */
+#define TELOPT_NAOVTS	14	/* negotiate about vertical tab stops */
+#define TELOPT_NAOVTD	15	/* negotiate about vertical tab disposition */
+#define TELOPT_NAOLFD	16	/* negotiate about output LF disposition */
+#define TELOPT_XASCII	17	/* extended ascic character set */
+#define	TELOPT_LOGOUT	18	/* force logout */
+#define	TELOPT_BM	19	/* byte macro */
+#define	TELOPT_DET	20	/* data entry terminal */
+#define	TELOPT_SUPDUP	21	/* supdup protocol */
+#define	TELOPT_SUPDUPOUTPUT 22	/* supdup output */
+#define	TELOPT_SNDLOC	23	/* send location */
+#define	TELOPT_TTYPE	24	/* terminal type */
+#define	TELOPT_EOR	25	/* end or record */
+#define	TELOPT_TUID	26	/* TACACS user identification */
+#define	TELOPT_OUTMRK	27	/* output marking */
+#define	TELOPT_TTYLOC	28	/* terminal location number */
+#define	TELOPT_3270REGIME 29	/* 3270 regime */
+#define	TELOPT_X3PAD	30	/* X.3 PAD */
+#define	TELOPT_NAWS	31	/* window size */
+#define	TELOPT_TSPEED	32	/* terminal speed */
+#define	TELOPT_LFLOW	33	/* remote flow control */
+#define TELOPT_LINEMODE	34	/* Linemode option */
+#define TELOPT_XDISPLOC	35	/* X Display Location */
+#define TELOPT_OLD_ENVIRON 36	/* Old - Environment variables */
+#define	TELOPT_AUTHENTICATION 37/* Authenticate */
+#define	TELOPT_ENCRYPT	38	/* Encryption option */
+#define TELOPT_NEW_ENVIRON 39	/* New - Environment variables */
+#define	TELOPT_EXOPL	255	/* extended-options-list */
+
+
+#define	NTELOPTS	(1+TELOPT_NEW_ENVIRON)
+#ifdef TELOPTS
+char *telopts[NTELOPTS+1] = {
+	"BINARY", "ECHO", "RCP", "SUPPRESS GO AHEAD", "NAME",
+	"STATUS", "TIMING MARK", "RCTE", "NAOL", "NAOP",
+	"NAOCRD", "NAOHTS", "NAOHTD", "NAOFFD", "NAOVTS",
+	"NAOVTD", "NAOLFD", "EXTEND ASCII", "LOGOUT", "BYTE MACRO",
+	"DATA ENTRY TERMINAL", "SUPDUP", "SUPDUP OUTPUT",
+	"SEND LOCATION", "TERMINAL TYPE", "END OF RECORD",
+	"TACACS UID", "OUTPUT MARKING", "TTYLOC",
+	"3270 REGIME", "X.3 PAD", "NAWS", "TSPEED", "LFLOW",
+	"LINEMODE", "XDISPLOC", "OLD-ENVIRON", "AUTHENTICATION",
+	"ENCRYPT", "NEW-ENVIRON",
+	0,
+};
+#define	TELOPT_FIRST	TELOPT_BINARY
+#define	TELOPT_LAST	TELOPT_NEW_ENVIRON
+#define	TELOPT_OK(x)	((unsigned int)(x) <= TELOPT_LAST)
+#define	TELOPT(x)	telopts[(x)-TELOPT_FIRST]
+#endif
+
+/* sub-option qualifiers */
+#define	TELQUAL_IS	0	/* option is... */
+#define	TELQUAL_SEND	1	/* send option */
+#define	TELQUAL_INFO	2	/* ENVIRON: informational version of IS */
+#define	TELQUAL_REPLY	2	/* AUTHENTICATION: client version of IS */
+#define	TELQUAL_NAME	3	/* AUTHENTICATION: client version of IS */
+
+#define	LFLOW_OFF		0	/* Disable remote flow control */
+#define	LFLOW_ON		1	/* Enable remote flow control */
+#define	LFLOW_RESTART_ANY	2	/* Restart output on any char */
+#define	LFLOW_RESTART_XON	3	/* Restart output only on XON */
+
+/*
+ * LINEMODE suboptions
+ */
+
+#define	LM_MODE		1
+#define	LM_FORWARDMASK	2
+#define	LM_SLC		3
+
+#define	MODE_EDIT	0x01
+#define	MODE_TRAPSIG	0x02
+#define	MODE_ACK	0x04
+#define MODE_SOFT_TAB	0x08
+#define MODE_LIT_ECHO	0x10
+
+#define	MODE_MASK	0x1f
+
+/* Not part of protocol, but needed to simplify things... */
+#define MODE_FLOW		0x0100
+#define MODE_ECHO		0x0200
+#define MODE_INBIN		0x0400
+#define MODE_OUTBIN		0x0800
+#define MODE_FORCE		0x1000
+
+#define	SLC_SYNCH	1
+#define	SLC_BRK		2
+#define	SLC_IP		3
+#define	SLC_AO		4
+#define	SLC_AYT		5
+#define	SLC_EOR		6
+#define	SLC_ABORT	7
+#define	SLC_EOF		8
+#define	SLC_SUSP	9
+#define	SLC_EC		10
+#define	SLC_EL		11
+#define	SLC_EW		12
+#define	SLC_RP		13
+#define	SLC_LNEXT	14
+#define	SLC_XON		15
+#define	SLC_XOFF	16
+#define	SLC_FORW1	17
+#define	SLC_FORW2	18
+
+#define	NSLC		18
+
+/*
+ * For backwards compatability, we define SLC_NAMES to be the
+ * list of names if SLC_NAMES is not defined.
+ */
+#define	SLC_NAMELIST	"0", "SYNCH", "BRK", "IP", "AO", "AYT", "EOR", \
+			"ABORT", "EOF", "SUSP", "EC", "EL", "EW", "RP", \
+			"LNEXT", "XON", "XOFF", "FORW1", "FORW2", 0,
+#ifdef	SLC_NAMES
+char *slc_names[] = {
+	SLC_NAMELIST
+};
+#else
+extern char *slc_names[];
+#define	SLC_NAMES SLC_NAMELIST
+#endif
+
+#define	SLC_NAME_OK(x)	((unsigned int)(x) <= NSLC)
+#define SLC_NAME(x)	slc_names[x]
+
+#define	SLC_NOSUPPORT	0
+#define	SLC_CANTCHANGE	1
+#define	SLC_VARIABLE	2
+#define	SLC_DEFAULT	3
+#define	SLC_LEVELBITS	0x03
+
+#define	SLC_FUNC	0
+#define	SLC_FLAGS	1
+#define	SLC_VALUE	2
+
+#define	SLC_ACK		0x80
+#define	SLC_FLUSHIN	0x40
+#define	SLC_FLUSHOUT	0x20
+
+#define	OLD_ENV_VAR	1
+#define	OLD_ENV_VALUE	0
+#define	NEW_ENV_VAR	0
+#define	NEW_ENV_VALUE	1
+#define	ENV_ESC		2
+#define ENV_USERVAR	3
+
+/*
+ * AUTHENTICATION suboptions
+ */
+
+/*
+ * Who is authenticating who ...
+ */
+#define	AUTH_WHO_CLIENT		0	/* Client authenticating server */
+#define	AUTH_WHO_SERVER		1	/* Server authenticating client */
+#define	AUTH_WHO_MASK		1
+
+/*
+ * amount of authentication done
+ */
+#define	AUTH_HOW_ONE_WAY	0
+#define	AUTH_HOW_MUTUAL		2
+#define	AUTH_HOW_MASK		2
+
+#define	AUTHTYPE_NULL		0
+#define	AUTHTYPE_KERBEROS_V4	1
+#define	AUTHTYPE_KERBEROS_V5	2
+#define	AUTHTYPE_SPX		3
+#define	AUTHTYPE_MINK		4
+#define	AUTHTYPE_CNT		5
+
+#define	AUTHTYPE_TEST		99
+
+#ifdef	AUTH_NAMES
+char *authtype_names[] = {
+	"NULL", "KERBEROS_V4", "KERBEROS_V5", "SPX", "MINK", 0,
+};
+#else
+extern char *authtype_names[];
+#endif
+
+#define	AUTHTYPE_NAME_OK(x)	((unsigned int)(x) < AUTHTYPE_CNT)
+#define	AUTHTYPE_NAME(x)	authtype_names[x]
+
+/*
+ * ENCRYPTion suboptions
+ */
+#define	ENCRYPT_IS		0	/* I pick encryption type ... */
+#define	ENCRYPT_SUPPORT		1	/* I support encryption types ... */
+#define	ENCRYPT_REPLY		2	/* Initial setup response */
+#define	ENCRYPT_START		3	/* Am starting to send encrypted */
+#define	ENCRYPT_END		4	/* Am ending encrypted */
+#define	ENCRYPT_REQSTART	5	/* Request you start encrypting */
+#define	ENCRYPT_REQEND		6	/* Request you send encrypting */
+#define	ENCRYPT_ENC_KEYID	7
+#define	ENCRYPT_DEC_KEYID	8
+#define	ENCRYPT_CNT		9
+
+#define	ENCTYPE_ANY		0
+#define	ENCTYPE_DES_CFB64	1
+#define	ENCTYPE_DES_OFB64	2
+#define	ENCTYPE_CNT		3
+
+#ifdef	ENCRYPT_NAMES
+char *encrypt_names[] = {
+	"IS", "SUPPORT", "REPLY", "START", "END",
+	"REQUEST-START", "REQUEST-END", "ENC-KEYID", "DEC-KEYID",
+	0,
+};
+char *enctype_names[] = {
+	"ANY", "DES_CFB64",  "DES_OFB64",  0,
+};
+#else
+extern char *encrypt_names[];
+extern char *enctype_names[];
+#endif
+
+
+#define	ENCRYPT_NAME_OK(x)	((unsigned int)(x) < ENCRYPT_CNT)
+#define	ENCRYPT_NAME(x)		encrypt_names[x]
+
+#define	ENCTYPE_NAME_OK(x)	((unsigned int)(x) < ENCTYPE_CNT)
+#define	ENCTYPE_NAME(x)		enctype_names[x]
+
+#endif /* !_TELNET_H_ */
diff --git a/contrib/telnet/libtelnet/auth-proto.h b/contrib/telnet/libtelnet/auth-proto.h
new file mode 100644
index 0000000..06bba2b
--- /dev/null
+++ b/contrib/telnet/libtelnet/auth-proto.h
@@ -0,0 +1,96 @@
+/*-
+ * Copyright (c) 1991, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *	@(#)auth-proto.h	8.1 (Berkeley) 6/4/93
+ */
+
+/*
+ * Copyright (C) 1990 by the Massachusetts Institute of Technology
+ *
+ * Export of this software from the United States of America is assumed
+ * to require a specific license from the United States Government.
+ * It is the responsibility of any person or organization contemplating
+ * export to obtain such a license before exporting.
+ * 
+ * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
+ * distribute this software and its documentation for any purpose and
+ * without fee is hereby granted, provided that the above copyright
+ * notice appear in all copies and that both that copyright notice and
+ * this permission notice appear in supporting documentation, and that
+ * the name of M.I.T. not be used in advertising or publicity pertaining
+ * to distribution of the software without specific, written prior
+ * permission.  M.I.T. makes no representations about the suitability of
+ * this software for any purpose.  It is provided "as is" without express
+ * or implied warranty.
+ */
+
+#if	!defined(P)
+#ifdef	__STDC__
+#define	P(x)	x
+#else
+#define	P(x)	()
+#endif
+#endif
+
+#if	defined(AUTHENTICATION)
+Authenticator *findauthenticator P((int, int));
+
+void auth_init P((char *, int));
+int auth_cmd P((int, char **));
+void auth_request P((void));
+void auth_send P((unsigned char *, int));
+void auth_send_retry P((void));
+void auth_is P((unsigned char *, int));
+void auth_reply P((unsigned char *, int));
+void auth_finished P((Authenticator *, int));
+int auth_wait P((char *));
+void auth_disable_name P((char *));
+void auth_gen_printsub P((unsigned char *, int, unsigned char *, int));
+
+#ifdef	KRB4
+int kerberos4_init P((Authenticator *, int));
+int kerberos4_send P((Authenticator *));
+void kerberos4_is P((Authenticator *, unsigned char *, int));
+void kerberos4_reply P((Authenticator *, unsigned char *, int));
+int kerberos4_status P((Authenticator *, char *, int));
+void kerberos4_printsub P((unsigned char *, int, unsigned char *, int));
+#endif
+
+#ifdef	KRB5
+int kerberos5_init P((Authenticator *, int));
+int kerberos5_send P((Authenticator *));
+void kerberos5_is P((Authenticator *, unsigned char *, int));
+void kerberos5_reply P((Authenticator *, unsigned char *, int));
+int kerberos5_status P((Authenticator *, char *, int));
+void kerberos5_printsub P((unsigned char *, int, unsigned char *, int));
+#endif
+#endif
diff --git a/contrib/telnet/libtelnet/auth.c b/contrib/telnet/libtelnet/auth.c
new file mode 100644
index 0000000..a8b287c
--- /dev/null
+++ b/contrib/telnet/libtelnet/auth.c
@@ -0,0 +1,671 @@
+/*-
+ * Copyright (c) 1991, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef lint
+static char sccsid[] = "@(#)auth.c	8.3 (Berkeley) 5/30/95";
+#endif /* not lint */
+
+/*
+ * Copyright (C) 1990 by the Massachusetts Institute of Technology
+ *
+ * Export of this software from the United States of America is assumed
+ * to require a specific license from the United States Government.
+ * It is the responsibility of any person or organization contemplating
+ * export to obtain such a license before exporting.
+ *
+ * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
+ * distribute this software and its documentation for any purpose and
+ * without fee is hereby granted, provided that the above copyright
+ * notice appear in all copies and that both that copyright notice and
+ * this permission notice appear in supporting documentation, and that
+ * the name of M.I.T. not be used in advertising or publicity pertaining
+ * to distribution of the software without specific, written prior
+ * permission.  M.I.T. makes no representations about the suitability of
+ * this software for any purpose.  It is provided "as is" without express
+ * or implied warranty.
+ */
+
+
+#if	defined(AUTHENTICATION)
+#include <stdio.h>
+#include <sys/types.h>
+#include <signal.h>
+#define	AUTH_NAMES
+#include <arpa/telnet.h>
+#ifdef	__STDC__
+#include <stdlib.h>
+#endif
+#ifdef	NO_STRING_H
+#include <strings.h>
+#else
+#include <string.h>
+#endif
+
+#include "encrypt.h"
+#include "auth.h"
+#include "misc-proto.h"
+#include "auth-proto.h"
+
+#define	typemask(x)		(1<<((x)-1))
+
+#ifdef	KRB4_ENCPWD
+extern krb4encpwd_init();
+extern krb4encpwd_send();
+extern krb4encpwd_is();
+extern krb4encpwd_reply();
+extern krb4encpwd_status();
+extern krb4encpwd_printsub();
+#endif
+
+#ifdef	RSA_ENCPWD
+extern rsaencpwd_init();
+extern rsaencpwd_send();
+extern rsaencpwd_is();
+extern rsaencpwd_reply();
+extern rsaencpwd_status();
+extern rsaencpwd_printsub();
+#endif
+
+int auth_debug_mode = 0;
+static 	char	*Name = "Noname";
+static	int	Server = 0;
+static	Authenticator	*authenticated = 0;
+static	int	authenticating = 0;
+static	int	validuser = 0;
+static	unsigned char	_auth_send_data[256];
+static	unsigned char	*auth_send_data;
+static	int	auth_send_cnt = 0;
+
+/*
+ * Authentication types supported.  Plese note that these are stored
+ * in priority order, i.e. try the first one first.
+ */
+Authenticator authenticators[] = {
+#ifdef	SPX
+	{ AUTHTYPE_SPX, AUTH_WHO_CLIENT|AUTH_HOW_MUTUAL,
+				spx_init,
+				spx_send,
+				spx_is,
+				spx_reply,
+				spx_status,
+				spx_printsub },
+	{ AUTHTYPE_SPX, AUTH_WHO_CLIENT|AUTH_HOW_ONE_WAY,
+				spx_init,
+				spx_send,
+				spx_is,
+				spx_reply,
+				spx_status,
+				spx_printsub },
+#endif
+#ifdef	KRB5
+# ifdef	ENCRYPTION
+	{ AUTHTYPE_KERBEROS_V5, AUTH_WHO_CLIENT|AUTH_HOW_MUTUAL,
+				kerberos5_init,
+				kerberos5_send,
+				kerberos5_is,
+				kerberos5_reply,
+				kerberos5_status,
+				kerberos5_printsub },
+# endif	/* ENCRYPTION */
+	{ AUTHTYPE_KERBEROS_V5, AUTH_WHO_CLIENT|AUTH_HOW_ONE_WAY,
+				kerberos5_init,
+				kerberos5_send,
+				kerberos5_is,
+				kerberos5_reply,
+				kerberos5_status,
+				kerberos5_printsub },
+#endif
+#ifdef	KRB4
+# ifdef ENCRYPTION
+	{ AUTHTYPE_KERBEROS_V4, AUTH_WHO_CLIENT|AUTH_HOW_MUTUAL,
+				kerberos4_init,
+				kerberos4_send,
+				kerberos4_is,
+				kerberos4_reply,
+				kerberos4_status,
+				kerberos4_printsub },
+# endif	/* ENCRYPTION */
+	{ AUTHTYPE_KERBEROS_V4, AUTH_WHO_CLIENT|AUTH_HOW_ONE_WAY,
+				kerberos4_init,
+				kerberos4_send,
+				kerberos4_is,
+				kerberos4_reply,
+				kerberos4_status,
+				kerberos4_printsub },
+#endif
+#ifdef	KRB4_ENCPWD
+	{ AUTHTYPE_KRB4_ENCPWD, AUTH_WHO_CLIENT|AUTH_HOW_MUTUAL,
+				krb4encpwd_init,
+				krb4encpwd_send,
+				krb4encpwd_is,
+				krb4encpwd_reply,
+				krb4encpwd_status,
+				krb4encpwd_printsub },
+#endif
+#ifdef	RSA_ENCPWD
+	{ AUTHTYPE_RSA_ENCPWD, AUTH_WHO_CLIENT|AUTH_HOW_ONE_WAY,
+				rsaencpwd_init,
+				rsaencpwd_send,
+				rsaencpwd_is,
+				rsaencpwd_reply,
+				rsaencpwd_status,
+				rsaencpwd_printsub },
+#endif
+	{ 0, },
+};
+
+static Authenticator NoAuth = { 0 };
+
+static int	i_support = 0;
+static int	i_wont_support = 0;
+
+	Authenticator *
+findauthenticator(type, way)
+	int type;
+	int way;
+{
+	Authenticator *ap = authenticators;
+
+	while (ap->type && (ap->type != type || ap->way != way))
+		++ap;
+	return(ap->type ? ap : 0);
+}
+
+	void
+auth_init(name, server)
+	char *name;
+	int server;
+{
+	Authenticator *ap = authenticators;
+
+	Server = server;
+	Name = name;
+
+	i_support = 0;
+	authenticated = 0;
+	authenticating = 0;
+	while (ap->type) {
+		if (!ap->init || (*ap->init)(ap, server)) {
+			i_support |= typemask(ap->type);
+			if (auth_debug_mode)
+				printf(">>>%s: I support auth type %d %d\r\n",
+					Name,
+					ap->type, ap->way);
+		}
+		else if (auth_debug_mode)
+			printf(">>>%s: Init failed: auth type %d %d\r\n",
+				Name, ap->type, ap->way);
+		++ap;
+	}
+}
+
+	void
+auth_disable_name(name)
+	char *name;
+{
+	int x;
+	for (x = 0; x < AUTHTYPE_CNT; ++x) {
+		if (!strcasecmp(name, AUTHTYPE_NAME(x))) {
+			i_wont_support |= typemask(x);
+			break;
+		}
+	}
+}
+
+	int
+getauthmask(type, maskp)
+	char *type;
+	int *maskp;
+{
+	register int x;
+
+	if (!strcasecmp(type, AUTHTYPE_NAME(0))) {
+		*maskp = -1;
+		return(1);
+	}
+
+	for (x = 1; x < AUTHTYPE_CNT; ++x) {
+		if (!strcasecmp(type, AUTHTYPE_NAME(x))) {
+			*maskp = typemask(x);
+			return(1);
+		}
+	}
+	return(0);
+}
+
+	int
+auth_enable(type)
+	char *type;
+{
+	return(auth_onoff(type, 1));
+}
+
+	int
+auth_disable(type)
+	char *type;
+{
+	return(auth_onoff(type, 0));
+}
+
+	int
+auth_onoff(type, on)
+	char *type;
+	int on;
+{
+	int i, mask = -1;
+	Authenticator *ap;
+
+	if (!strcasecmp(type, "?") || !strcasecmp(type, "help")) {
+		printf("auth %s 'type'\n", on ? "enable" : "disable");
+		printf("Where 'type' is one of:\n");
+		printf("\t%s\n", AUTHTYPE_NAME(0));
+		mask = 0;
+		for (ap = authenticators; ap->type; ap++) {
+			if ((mask & (i = typemask(ap->type))) != 0)
+				continue;
+			mask |= i;
+			printf("\t%s\n", AUTHTYPE_NAME(ap->type));
+		}
+		return(0);
+	}
+
+	if (!getauthmask(type, &mask)) {
+		printf("%s: invalid authentication type\n", type);
+		return(0);
+	}
+	if (on)
+		i_wont_support &= ~mask;
+	else
+		i_wont_support |= mask;
+	return(1);
+}
+
+	int
+auth_togdebug(on)
+	int on;
+{
+	if (on < 0)
+		auth_debug_mode ^= 1;
+	else
+		auth_debug_mode = on;
+	printf("auth debugging %s\n", auth_debug_mode ? "enabled" : "disabled");
+	return(1);
+}
+
+	int
+auth_status()
+{
+	Authenticator *ap;
+	int i, mask;
+
+	if (i_wont_support == -1)
+		printf("Authentication disabled\n");
+	else
+		printf("Authentication enabled\n");
+
+	mask = 0;
+	for (ap = authenticators; ap->type; ap++) {
+		if ((mask & (i = typemask(ap->type))) != 0)
+			continue;
+		mask |= i;
+		printf("%s: %s\n", AUTHTYPE_NAME(ap->type),
+			(i_wont_support & typemask(ap->type)) ?
+					"disabled" : "enabled");
+	}
+	return(1);
+}
+
+/*
+ * This routine is called by the server to start authentication
+ * negotiation.
+ */
+	void
+auth_request()
+{
+	static unsigned char str_request[64] = { IAC, SB,
+						 TELOPT_AUTHENTICATION,
+						 TELQUAL_SEND, };
+	Authenticator *ap = authenticators;
+	unsigned char *e = str_request + 4;
+
+	if (!authenticating) {
+		authenticating = 1;
+		while (ap->type) {
+			if (i_support & ~i_wont_support & typemask(ap->type)) {
+				if (auth_debug_mode) {
+					printf(">>>%s: Sending type %d %d\r\n",
+						Name, ap->type, ap->way);
+				}
+				*e++ = ap->type;
+				*e++ = ap->way;
+			}
+			++ap;
+		}
+		*e++ = IAC;
+		*e++ = SE;
+		net_write(str_request, e - str_request);
+		printsub('>', &str_request[2], e - str_request - 2);
+	}
+}
+
+/*
+ * This is called when an AUTH SEND is received.
+ * It should never arrive on the server side (as only the server can
+ * send an AUTH SEND).
+ * You should probably respond to it if you can...
+ *
+ * If you want to respond to the types out of order (i.e. even
+ * if he sends  LOGIN KERBEROS and you support both, you respond
+ * with KERBEROS instead of LOGIN (which is against what the
+ * protocol says)) you will have to hack this code...
+ */
+	void
+auth_send(data, cnt)
+	unsigned char *data;
+	int cnt;
+{
+	Authenticator *ap;
+	static unsigned char str_none[] = { IAC, SB, TELOPT_AUTHENTICATION,
+					    TELQUAL_IS, AUTHTYPE_NULL, 0,
+					    IAC, SE };
+	if (Server) {
+		if (auth_debug_mode) {
+			printf(">>>%s: auth_send called!\r\n", Name);
+		}
+		return;
+	}
+
+	if (auth_debug_mode) {
+		printf(">>>%s: auth_send got:", Name);
+		printd(data, cnt); printf("\r\n");
+	}
+
+	/*
+	 * Save the data, if it is new, so that we can continue looking
+	 * at it if the authorization we try doesn't work
+	 */
+	if (data < _auth_send_data ||
+	    data > _auth_send_data + sizeof(_auth_send_data)) {
+		auth_send_cnt = cnt > sizeof(_auth_send_data)
+					? sizeof(_auth_send_data)
+					: cnt;
+		memmove((void *)_auth_send_data, (void *)data, auth_send_cnt);
+		auth_send_data = _auth_send_data;
+	} else {
+		/*
+		 * This is probably a no-op, but we just make sure
+		 */
+		auth_send_data = data;
+		auth_send_cnt = cnt;
+	}
+	while ((auth_send_cnt -= 2) >= 0) {
+		if (auth_debug_mode)
+			printf(">>>%s: He supports %d\r\n",
+				Name, *auth_send_data);
+		if ((i_support & ~i_wont_support) & typemask(*auth_send_data)) {
+			ap = findauthenticator(auth_send_data[0],
+					       auth_send_data[1]);
+			if (ap && ap->send) {
+				if (auth_debug_mode)
+					printf(">>>%s: Trying %d %d\r\n",
+						Name, auth_send_data[0],
+							auth_send_data[1]);
+				if ((*ap->send)(ap)) {
+					/*
+					 * Okay, we found one we like
+					 * and did it.
+					 * we can go home now.
+					 */
+					if (auth_debug_mode)
+						printf(">>>%s: Using type %d\r\n",
+							Name, *auth_send_data);
+					auth_send_data += 2;
+					return;
+				}
+			}
+			/* else
+			 *	just continue on and look for the
+			 *	next one if we didn't do anything.
+			 */
+		}
+		auth_send_data += 2;
+	}
+	net_write(str_none, sizeof(str_none));
+	printsub('>', &str_none[2], sizeof(str_none) - 2);
+	if (auth_debug_mode)
+		printf(">>>%s: Sent failure message\r\n", Name);
+	auth_finished(0, AUTH_REJECT);
+#ifdef KANNAN
+	/*
+	 *  We requested strong authentication, however no mechanisms worked.
+	 *  Therefore, exit on client end.
+	 */
+	printf("Unable to securely authenticate user ... exit\n");
+	exit(0);
+#endif /* KANNAN */
+}
+
+	void
+auth_send_retry()
+{
+	/*
+	 * if auth_send_cnt <= 0 then auth_send will end up rejecting
+	 * the authentication and informing the other side of this.
+	 */
+	auth_send(auth_send_data, auth_send_cnt);
+}
+
+	void
+auth_is(data, cnt)
+	unsigned char *data;
+	int cnt;
+{
+	Authenticator *ap;
+
+	if (cnt < 2)
+		return;
+
+	if (data[0] == AUTHTYPE_NULL) {
+		auth_finished(0, AUTH_REJECT);
+		return;
+	}
+
+	if (ap = findauthenticator(data[0], data[1])) {
+		if (ap->is)
+			(*ap->is)(ap, data+2, cnt-2);
+	} else if (auth_debug_mode)
+		printf(">>>%s: Invalid authentication in IS: %d\r\n",
+			Name, *data);
+}
+
+	void
+auth_reply(data, cnt)
+	unsigned char *data;
+	int cnt;
+{
+	Authenticator *ap;
+
+	if (cnt < 2)
+		return;
+
+	if (ap = findauthenticator(data[0], data[1])) {
+		if (ap->reply)
+			(*ap->reply)(ap, data+2, cnt-2);
+	} else if (auth_debug_mode)
+		printf(">>>%s: Invalid authentication in SEND: %d\r\n",
+			Name, *data);
+}
+
+	void
+auth_name(data, cnt)
+	unsigned char *data;
+	int cnt;
+{
+	Authenticator *ap;
+	unsigned char savename[256];
+
+	if (cnt < 1) {
+		if (auth_debug_mode)
+			printf(">>>%s: Empty name in NAME\r\n", Name);
+		return;
+	}
+	if (cnt > sizeof(savename) - 1) {
+		if (auth_debug_mode)
+			printf(">>>%s: Name in NAME (%d) exceeds %d length\r\n",
+					Name, cnt, sizeof(savename)-1);
+		return;
+	}
+	memmove((void *)savename, (void *)data, cnt);
+	savename[cnt] = '\0';	/* Null terminate */
+	if (auth_debug_mode)
+		printf(">>>%s: Got NAME [%s]\r\n", Name, savename);
+	auth_encrypt_user(savename);
+}
+
+	int
+auth_sendname(cp, len)
+	unsigned char *cp;
+	int len;
+{
+	static unsigned char str_request[256+6]
+			= { IAC, SB, TELOPT_AUTHENTICATION, TELQUAL_NAME, };
+	register unsigned char *e = str_request + 4;
+	register unsigned char *ee = &str_request[sizeof(str_request)-2];
+
+	while (--len >= 0) {
+		if ((*e++ = *cp++) == IAC)
+			*e++ = IAC;
+		if (e >= ee)
+			return(0);
+	}
+	*e++ = IAC;
+	*e++ = SE;
+	net_write(str_request, e - str_request);
+	printsub('>', &str_request[2], e - &str_request[2]);
+	return(1);
+}
+
+	void
+auth_finished(ap, result)
+	Authenticator *ap;
+	int result;
+{
+	if (!(authenticated = ap))
+		authenticated = &NoAuth;
+	validuser = result;
+}
+
+	/* ARGSUSED */
+	static void
+auth_intr(sig)
+	int sig;
+{
+	auth_finished(0, AUTH_REJECT);
+}
+
+	int
+auth_wait(name)
+	char *name;
+{
+	if (auth_debug_mode)
+		printf(">>>%s: in auth_wait.\r\n", Name);
+
+	if (Server && !authenticating)
+		return(0);
+
+	(void) signal(SIGALRM, auth_intr);
+	alarm(30);
+	while (!authenticated)
+		if (telnet_spin())
+			break;
+	alarm(0);
+	(void) signal(SIGALRM, SIG_DFL);
+
+	/*
+	 * Now check to see if the user is valid or not
+	 */
+	if (!authenticated || authenticated == &NoAuth)
+		return(AUTH_REJECT);
+
+	if (validuser == AUTH_VALID)
+		validuser = AUTH_USER;
+
+	if (authenticated->status)
+		validuser = (*authenticated->status)(authenticated,
+						     name, validuser);
+	return(validuser);
+}
+
+	void
+auth_debug(mode)
+	int mode;
+{
+	auth_debug_mode = mode;
+}
+
+	void
+auth_printsub(data, cnt, buf, buflen)
+	unsigned char *data, *buf;
+	int cnt, buflen;
+{
+	Authenticator *ap;
+
+	if ((ap = findauthenticator(data[1], data[2])) && ap->printsub)
+		(*ap->printsub)(data, cnt, buf, buflen);
+	else
+		auth_gen_printsub(data, cnt, buf, buflen);
+}
+
+	void
+auth_gen_printsub(data, cnt, buf, buflen)
+	unsigned char *data, *buf;
+	int cnt, buflen;
+{
+	register unsigned char *cp;
+	unsigned char tbuf[16];
+
+	cnt -= 3;
+	data += 3;
+	buf[buflen-1] = '\0';
+	buf[buflen-2] = '*';
+	buflen -= 2;
+	for (; cnt > 0; cnt--, data++) {
+		sprintf((char *)tbuf, " %d", *data);
+		for (cp = tbuf; *cp && buflen > 0; --buflen)
+			*buf++ = *cp++;
+		if (buflen <= 0)
+			return;
+	}
+	*buf = '\0';
+}
+#endif
diff --git a/contrib/telnet/libtelnet/auth.h b/contrib/telnet/libtelnet/auth.h
new file mode 100644
index 0000000..615e8a0
--- /dev/null
+++ b/contrib/telnet/libtelnet/auth.h
@@ -0,0 +1,87 @@
+/*-
+ * Copyright (c) 1991, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *	@(#)auth.h	8.1 (Berkeley) 6/4/93
+ */
+
+/*
+ * Copyright (C) 1990 by the Massachusetts Institute of Technology
+ *
+ * Export of this software from the United States of America is assumed
+ * to require a specific license from the United States Government.
+ * It is the responsibility of any person or organization contemplating
+ * export to obtain such a license before exporting.
+ *
+ * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
+ * distribute this software and its documentation for any purpose and
+ * without fee is hereby granted, provided that the above copyright
+ * notice appear in all copies and that both that copyright notice and
+ * this permission notice appear in supporting documentation, and that
+ * the name of M.I.T. not be used in advertising or publicity pertaining
+ * to distribution of the software without specific, written prior
+ * permission.  M.I.T. makes no representations about the suitability of
+ * this software for any purpose.  It is provided "as is" without express
+ * or implied warranty.
+ */
+
+#ifndef	__AUTH__
+#define	__AUTH__
+
+#define	AUTH_REJECT	0	/* Rejected */
+#define	AUTH_UNKNOWN	1	/* We don't know who he is, but he's okay */
+#define	AUTH_OTHER	2	/* We know him, but not his name */
+#define	AUTH_USER	3	/* We know he name */
+#define	AUTH_VALID	4	/* We know him, and he needs no password */
+
+#if	!defined(P)
+#ifdef	__STDC__
+#define P(x)	x
+#else
+#define P(x)	()
+#endif
+#endif
+
+typedef struct XauthP {
+	int	type;
+	int	way;
+	int	(*init) P((struct XauthP *, int));
+	int	(*send) P((struct XauthP *));
+	void	(*is) P((struct XauthP *, unsigned char *, int));
+	void	(*reply) P((struct XauthP *, unsigned char *, int));
+	int	(*status) P((struct XauthP *, char *, int));
+	void	(*printsub) P((unsigned char *, int, unsigned char *, int));
+} Authenticator;
+
+#include "auth-proto.h"
+
+extern auth_debug_mode;
+#endif
diff --git a/contrib/telnet/libtelnet/enc-proto.h b/contrib/telnet/libtelnet/enc-proto.h
new file mode 100644
index 0000000..2e30908
--- /dev/null
+++ b/contrib/telnet/libtelnet/enc-proto.h
@@ -0,0 +1,125 @@
+/*-
+ * Copyright (c) 1991, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *	@(#)enc-proto.h	8.1 (Berkeley) 6/4/93
+ */
+
+/*
+ * Copyright (C) 1990 by the Massachusetts Institute of Technology
+ *
+ * Export of this software from the United States of America is assumed
+ * to require a specific license from the United States Government.
+ * It is the responsibility of any person or organization contemplating
+ * export to obtain such a license before exporting.
+ *
+ * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
+ * distribute this software and its documentation for any purpose and
+ * without fee is hereby granted, provided that the above copyright
+ * notice appear in all copies and that both that copyright notice and
+ * this permission notice appear in supporting documentation, and that
+ * the name of M.I.T. not be used in advertising or publicity pertaining
+ * to distribution of the software without specific, written prior
+ * permission.  M.I.T. makes no representations about the suitability of
+ * this software for any purpose.  It is provided "as is" without express
+ * or implied warranty.
+ */
+#if	!defined(P)
+#ifdef	__STDC__
+#define	P(x)	x
+#else
+#define	P(x)	()
+#endif
+#endif
+
+#ifdef	ENCRYPTION
+void encrypt_init P((char *, int));
+Encryptions *findencryption P((int));
+void encrypt_send_supprt P((void));
+void encrypt_auto P((int));
+void decrypt_auto P((int));
+void encrypt_is P((unsigned char *, int));
+void encrypt_reply P((unsigned char *, int));
+void encrypt_start_input P((int));
+void encrypt_session_key P((Session_Key *, int));
+void encrypt_end_input P((void));
+void encrypt_start_output P((int));
+void encrypt_end_output P((void));
+void encrypt_send_request_start P((void));
+void encrypt_send_request_end P((void));
+void encrypt_send_end P((void));
+void encrypt_wait P((void));
+void encrypt_send_support P((void));
+void encrypt_send_keyid P((int, unsigned char *, int, int));
+int net_write P((unsigned char *, int));
+
+#ifdef	TELENTD
+void encrypt_wait P((void));
+#else
+int encrypt_cmd P((int, char **));
+void encrypt_display P((void));
+#endif
+
+void krbdes_encrypt P((unsigned char *, int));
+int krbdes_decrypt P((int));
+int krbdes_is P((unsigned char *, int));
+int krbdes_reply P((unsigned char *, int));
+void krbdes_init P((int));
+int krbdes_start P((int, int));
+void krbdes_session P((Session_Key *, int));
+void krbdes_printsub P((unsigned char *, int, unsigned char *, int));
+
+void cfb64_encrypt P((unsigned char *, int));
+int cfb64_decrypt P((int));
+void cfb64_init P((int));
+int cfb64_start P((int, int));
+int cfb64_is P((unsigned char *, int));
+int cfb64_reply P((unsigned char *, int));
+void cfb64_session P((Session_Key *, int));
+int cfb64_keyid P((int, unsigned char *, int *));
+void cfb64_printsub P((unsigned char *, int, unsigned char *, int));
+
+void ofb64_encrypt P((unsigned char *, int));
+int ofb64_decrypt P((int));
+void ofb64_init P((int));
+int ofb64_start P((int, int));
+int ofb64_is P((unsigned char *, int));
+int ofb64_reply P((unsigned char *, int));
+void ofb64_session P((Session_Key *, int));
+int ofb64_keyid P((int, unsigned char *, int *));
+void ofb64_printsub P((unsigned char *, int, unsigned char *, int));
+
+int  des_new_random_key P((Block));
+void des_set_random_generator_seed P((Block));
+void des_key_sched P((Block, Schedule));
+void des_ecb_encrypt P((Block, Block, Schedule, int));
+int  des_string_to_key P((char *, Block));
+#endif	/* ENCRYPTION */
diff --git a/contrib/telnet/libtelnet/enc_des.c b/contrib/telnet/libtelnet/enc_des.c
new file mode 100644
index 0000000..d6886fd
--- /dev/null
+++ b/contrib/telnet/libtelnet/enc_des.c
@@ -0,0 +1,724 @@
+/*-
+ * Copyright (c) 1991, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef lint
+static char sccsid[] = "@(#)enc_des.c	8.3 (Berkeley) 5/30/95";
+#endif /* not lint */
+
+#ifdef	ENCRYPTION
+# ifdef	AUTHENTICATION
+#  ifdef DES_ENCRYPTION
+#include <arpa/telnet.h>
+#include <stdio.h>
+#ifdef	__STDC__
+#include <stdlib.h>
+#endif
+
+#include "encrypt.h"
+#include "key-proto.h"
+#include "misc-proto.h"
+
+extern encrypt_debug_mode;
+
+#define	CFB	0
+#define	OFB	1
+
+#define	NO_SEND_IV	1
+#define	NO_RECV_IV	2
+#define	NO_KEYID	4
+#define	IN_PROGRESS	(NO_SEND_IV|NO_RECV_IV|NO_KEYID)
+#define	SUCCESS		0
+#define	FAILED		-1
+
+
+struct fb {
+	Block krbdes_key;
+	Schedule krbdes_sched;
+	Block temp_feed;
+	unsigned char fb_feed[64];
+	int need_start;
+	int state[2];
+	int keyid[2];
+	int once;
+	struct stinfo {
+		Block		str_output;
+		Block		str_feed;
+		Block		str_iv;
+		Block		str_ikey;
+		Schedule	str_sched;
+		int		str_index;
+		int		str_flagshift;
+	} streams[2];
+};
+
+static struct fb fb[2];
+
+struct keyidlist {
+	char	*keyid;
+	int	keyidlen;
+	char	*key;
+	int	keylen;
+	int	flags;
+} keyidlist [] = {
+	{ "\0", 1, 0, 0, 0 },		/* default key of zero */
+	{ 0, 0, 0, 0, 0 }
+};
+
+#define	KEYFLAG_MASK	03
+
+#define	KEYFLAG_NOINIT	00
+#define	KEYFLAG_INIT	01
+#define	KEYFLAG_OK	02
+#define	KEYFLAG_BAD	03
+
+#define	KEYFLAG_SHIFT	2
+
+#define	SHIFT_VAL(a,b)	(KEYFLAG_SHIFT*((a)+((b)*2)))
+
+#define	FB64_IV		1
+#define	FB64_IV_OK	2
+#define	FB64_IV_BAD	3
+
+
+void fb64_stream_iv P((Block, struct stinfo *));
+void fb64_init P((struct fb *));
+static int fb64_start P((struct fb *, int, int));
+int fb64_is P((unsigned char *, int, struct fb *));
+int fb64_reply P((unsigned char *, int, struct fb *));
+static void fb64_session P((Session_Key *, int, struct fb *));
+void fb64_stream_key P((Block, struct stinfo *));
+int fb64_keyid P((int, unsigned char *, int *, struct fb *));
+
+	void
+cfb64_init(server)
+	int server;
+{
+	fb64_init(&fb[CFB]);
+	fb[CFB].fb_feed[4] = ENCTYPE_DES_CFB64;
+	fb[CFB].streams[0].str_flagshift = SHIFT_VAL(0, CFB);
+	fb[CFB].streams[1].str_flagshift = SHIFT_VAL(1, CFB);
+}
+
+	void
+ofb64_init(server)
+	int server;
+{
+	fb64_init(&fb[OFB]);
+	fb[OFB].fb_feed[4] = ENCTYPE_DES_OFB64;
+	fb[CFB].streams[0].str_flagshift = SHIFT_VAL(0, OFB);
+	fb[CFB].streams[1].str_flagshift = SHIFT_VAL(1, OFB);
+}
+
+	void
+fb64_init(fbp)
+	register struct fb *fbp;
+{
+	memset((void *)fbp, 0, sizeof(*fbp));
+	fbp->state[0] = fbp->state[1] = FAILED;
+	fbp->fb_feed[0] = IAC;
+	fbp->fb_feed[1] = SB;
+	fbp->fb_feed[2] = TELOPT_ENCRYPT;
+	fbp->fb_feed[3] = ENCRYPT_IS;
+}
+
+/*
+ * Returns:
+ *	-1: some error.  Negotiation is done, encryption not ready.
+ *	 0: Successful, initial negotiation all done.
+ *	 1: successful, negotiation not done yet.
+ *	 2: Not yet.  Other things (like getting the key from
+ *	    Kerberos) have to happen before we can continue.
+ */
+	int
+cfb64_start(dir, server)
+	int dir;
+	int server;
+{
+	return(fb64_start(&fb[CFB], dir, server));
+}
+	int
+ofb64_start(dir, server)
+	int dir;
+	int server;
+{
+	return(fb64_start(&fb[OFB], dir, server));
+}
+
+	static int
+fb64_start(fbp, dir, server)
+	struct fb *fbp;
+	int dir;
+	int server;
+{
+	Block b;
+	int x;
+	unsigned char *p;
+	register int state;
+
+	switch (dir) {
+	case DIR_DECRYPT:
+		/*
+		 * This is simply a request to have the other side
+		 * start output (our input).  He will negotiate an
+		 * IV so we need not look for it.
+		 */
+		state = fbp->state[dir-1];
+		if (state == FAILED)
+			state = IN_PROGRESS;
+		break;
+
+	case DIR_ENCRYPT:
+		state = fbp->state[dir-1];
+		if (state == FAILED)
+			state = IN_PROGRESS;
+		else if ((state & NO_SEND_IV) == 0)
+			break;
+
+		if (!VALIDKEY(fbp->krbdes_key)) {
+			fbp->need_start = 1;
+			break;
+		}
+		state &= ~NO_SEND_IV;
+		state |= NO_RECV_IV;
+		if (encrypt_debug_mode)
+			printf("Creating new feed\r\n");
+		/*
+		 * Create a random feed and send it over.
+		 */
+		des_new_random_key(fbp->temp_feed);
+		des_ecb_encrypt(fbp->temp_feed, fbp->temp_feed,
+				fbp->krbdes_sched, 1);
+		p = fbp->fb_feed + 3;
+		*p++ = ENCRYPT_IS;
+		p++;
+		*p++ = FB64_IV;
+		for (x = 0; x < sizeof(Block); ++x) {
+			if ((*p++ = fbp->temp_feed[x]) == IAC)
+				*p++ = IAC;
+		}
+		*p++ = IAC;
+		*p++ = SE;
+		printsub('>', &fbp->fb_feed[2], p - &fbp->fb_feed[2]);
+		net_write(fbp->fb_feed, p - fbp->fb_feed);
+		break;
+	default:
+		return(FAILED);
+	}
+	return(fbp->state[dir-1] = state);
+}
+
+/*
+ * Returns:
+ *	-1: some error.  Negotiation is done, encryption not ready.
+ *	 0: Successful, initial negotiation all done.
+ *	 1: successful, negotiation not done yet.
+ */
+	int
+cfb64_is(data, cnt)
+	unsigned char *data;
+	int cnt;
+{
+	return(fb64_is(data, cnt, &fb[CFB]));
+}
+	int
+ofb64_is(data, cnt)
+	unsigned char *data;
+	int cnt;
+{
+	return(fb64_is(data, cnt, &fb[OFB]));
+}
+
+	int
+fb64_is(data, cnt, fbp)
+	unsigned char *data;
+	int cnt;
+	struct fb *fbp;
+{
+	int x;
+	unsigned char *p;
+	Block b;
+	register int state = fbp->state[DIR_DECRYPT-1];
+
+	if (cnt-- < 1)
+		goto failure;
+
+	switch (*data++) {
+	case FB64_IV:
+		if (cnt != sizeof(Block)) {
+			if (encrypt_debug_mode)
+				printf("CFB64: initial vector failed on size\r\n");
+			state = FAILED;
+			goto failure;
+		}
+
+		if (encrypt_debug_mode)
+			printf("CFB64: initial vector received\r\n");
+
+		if (encrypt_debug_mode)
+			printf("Initializing Decrypt stream\r\n");
+
+		fb64_stream_iv((void *)data, &fbp->streams[DIR_DECRYPT-1]);
+
+		p = fbp->fb_feed + 3;
+		*p++ = ENCRYPT_REPLY;
+		p++;
+		*p++ = FB64_IV_OK;
+		*p++ = IAC;
+		*p++ = SE;
+		printsub('>', &fbp->fb_feed[2], p - &fbp->fb_feed[2]);
+		net_write(fbp->fb_feed, p - fbp->fb_feed);
+
+		state = fbp->state[DIR_DECRYPT-1] = IN_PROGRESS;
+		break;
+
+	default:
+		if (encrypt_debug_mode) {
+			printf("Unknown option type: %d\r\n", *(data-1));
+			printd(data, cnt);
+			printf("\r\n");
+		}
+		/* FALL THROUGH */
+	failure:
+		/*
+		 * We failed.  Send an FB64_IV_BAD option
+		 * to the other side so it will know that
+		 * things failed.
+		 */
+		p = fbp->fb_feed + 3;
+		*p++ = ENCRYPT_REPLY;
+		p++;
+		*p++ = FB64_IV_BAD;
+		*p++ = IAC;
+		*p++ = SE;
+		printsub('>', &fbp->fb_feed[2], p - &fbp->fb_feed[2]);
+		net_write(fbp->fb_feed, p - fbp->fb_feed);
+
+		break;
+	}
+	return(fbp->state[DIR_DECRYPT-1] = state);
+}
+
+/*
+ * Returns:
+ *	-1: some error.  Negotiation is done, encryption not ready.
+ *	 0: Successful, initial negotiation all done.
+ *	 1: successful, negotiation not done yet.
+ */
+	int
+cfb64_reply(data, cnt)
+	unsigned char *data;
+	int cnt;
+{
+	return(fb64_reply(data, cnt, &fb[CFB]));
+}
+	int
+ofb64_reply(data, cnt)
+	unsigned char *data;
+	int cnt;
+{
+	return(fb64_reply(data, cnt, &fb[OFB]));
+}
+
+
+	int
+fb64_reply(data, cnt, fbp)
+	unsigned char *data;
+	int cnt;
+	struct fb *fbp;
+{
+	int x;
+	unsigned char *p;
+	Block b;
+	register int state = fbp->state[DIR_ENCRYPT-1];
+
+	if (cnt-- < 1)
+		goto failure;
+
+	switch (*data++) {
+	case FB64_IV_OK:
+		fb64_stream_iv(fbp->temp_feed, &fbp->streams[DIR_ENCRYPT-1]);
+		if (state == FAILED)
+			state = IN_PROGRESS;
+		state &= ~NO_RECV_IV;
+		encrypt_send_keyid(DIR_ENCRYPT, (unsigned char *)"\0", 1, 1);
+		break;
+
+	case FB64_IV_BAD:
+		memset(fbp->temp_feed, 0, sizeof(Block));
+		fb64_stream_iv(fbp->temp_feed, &fbp->streams[DIR_ENCRYPT-1]);
+		state = FAILED;
+		break;
+
+	default:
+		if (encrypt_debug_mode) {
+			printf("Unknown option type: %d\r\n", data[-1]);
+			printd(data, cnt);
+			printf("\r\n");
+		}
+		/* FALL THROUGH */
+	failure:
+		state = FAILED;
+		break;
+	}
+	return(fbp->state[DIR_ENCRYPT-1] = state);
+}
+
+	void
+cfb64_session(key, server)
+	Session_Key *key;
+	int server;
+{
+	fb64_session(key, server, &fb[CFB]);
+}
+
+	void
+ofb64_session(key, server)
+	Session_Key *key;
+	int server;
+{
+	fb64_session(key, server, &fb[OFB]);
+}
+
+	static void
+fb64_session(key, server, fbp)
+	Session_Key *key;
+	int server;
+	struct fb *fbp;
+{
+
+	if (!key || key->type != SK_DES) {
+		if (encrypt_debug_mode)
+			printf("Can't set krbdes's session key (%d != %d)\r\n",
+				key ? key->type : -1, SK_DES);
+		return;
+	}
+	memmove((void *)fbp->krbdes_key, (void *)key->data, sizeof(Block));
+
+	fb64_stream_key(fbp->krbdes_key, &fbp->streams[DIR_ENCRYPT-1]);
+	fb64_stream_key(fbp->krbdes_key, &fbp->streams[DIR_DECRYPT-1]);
+
+	if (fbp->once == 0) {
+		des_set_random_generator_seed(fbp->krbdes_key);
+		fbp->once = 1;
+	}
+	des_key_sched(fbp->krbdes_key, fbp->krbdes_sched);
+	/*
+	 * Now look to see if krbdes_start() was was waiting for
+	 * the key to show up.  If so, go ahead an call it now
+	 * that we have the key.
+	 */
+	if (fbp->need_start) {
+		fbp->need_start = 0;
+		fb64_start(fbp, DIR_ENCRYPT, server);
+	}
+}
+
+/*
+ * We only accept a keyid of 0.  If we get a keyid of
+ * 0, then mark the state as SUCCESS.
+ */
+	int
+cfb64_keyid(dir, kp, lenp)
+	int dir, *lenp;
+	unsigned char *kp;
+{
+	return(fb64_keyid(dir, kp, lenp, &fb[CFB]));
+}
+
+	int
+ofb64_keyid(dir, kp, lenp)
+	int dir, *lenp;
+	unsigned char *kp;
+{
+	return(fb64_keyid(dir, kp, lenp, &fb[OFB]));
+}
+
+	int
+fb64_keyid(dir, kp, lenp, fbp)
+	int dir, *lenp;
+	unsigned char *kp;
+	struct fb *fbp;
+{
+	register int state = fbp->state[dir-1];
+
+	if (*lenp != 1 || (*kp != '\0')) {
+		*lenp = 0;
+		return(state);
+	}
+
+	if (state == FAILED)
+		state = IN_PROGRESS;
+
+	state &= ~NO_KEYID;
+
+	return(fbp->state[dir-1] = state);
+}
+
+	void
+fb64_printsub(data, cnt, buf, buflen, type)
+	unsigned char *data, *buf, *type;
+	int cnt, buflen;
+{
+	char lbuf[32];
+	register int i;
+	char *cp;
+
+	buf[buflen-1] = '\0';		/* make sure it's NULL terminated */
+	buflen -= 1;
+
+	switch(data[2]) {
+	case FB64_IV:
+		sprintf(lbuf, "%s_IV", type);
+		cp = lbuf;
+		goto common;
+
+	case FB64_IV_OK:
+		sprintf(lbuf, "%s_IV_OK", type);
+		cp = lbuf;
+		goto common;
+
+	case FB64_IV_BAD:
+		sprintf(lbuf, "%s_IV_BAD", type);
+		cp = lbuf;
+		goto common;
+
+	default:
+		sprintf(lbuf, " %d (unknown)", data[2]);
+		cp = lbuf;
+	common:
+		for (; (buflen > 0) && (*buf = *cp++); buf++)
+			buflen--;
+		for (i = 3; i < cnt; i++) {
+			sprintf(lbuf, " %d", data[i]);
+			for (cp = lbuf; (buflen > 0) && (*buf = *cp++); buf++)
+				buflen--;
+		}
+		break;
+	}
+}
+
+	void
+cfb64_printsub(data, cnt, buf, buflen)
+	unsigned char *data, *buf;
+	int cnt, buflen;
+{
+	fb64_printsub(data, cnt, buf, buflen, "CFB64");
+}
+
+	void
+ofb64_printsub(data, cnt, buf, buflen)
+	unsigned char *data, *buf;
+	int cnt, buflen;
+{
+	fb64_printsub(data, cnt, buf, buflen, "OFB64");
+}
+
+	void
+fb64_stream_iv(seed, stp)
+	Block seed;
+	register struct stinfo *stp;
+{
+
+	memmove((void *)stp->str_iv, (void *)seed, sizeof(Block));
+	memmove((void *)stp->str_output, (void *)seed, sizeof(Block));
+
+	des_key_sched(stp->str_ikey, stp->str_sched);
+
+	stp->str_index = sizeof(Block);
+}
+
+	void
+fb64_stream_key(key, stp)
+	Block key;
+	register struct stinfo *stp;
+{
+	memmove((void *)stp->str_ikey, (void *)key, sizeof(Block));
+	des_key_sched(key, stp->str_sched);
+
+	memmove((void *)stp->str_output, (void *)stp->str_iv, sizeof(Block));
+
+	stp->str_index = sizeof(Block);
+}
+
+/*
+ * DES 64 bit Cipher Feedback
+ *
+ *     key --->+-----+
+ *          +->| DES |--+
+ *          |  +-----+  |
+ *	    |           v
+ *  INPUT --(--------->(+)+---> DATA
+ *          |             |
+ *	    +-------------+
+ *
+ *
+ * Given:
+ *	iV: Initial vector, 64 bits (8 bytes) long.
+ *	Dn: the nth chunk of 64 bits (8 bytes) of data to encrypt (decrypt).
+ *	On: the nth chunk of 64 bits (8 bytes) of encrypted (decrypted) output.
+ *
+ *	V0 = DES(iV, key)
+ *	On = Dn ^ Vn
+ *	V(n+1) = DES(On, key)
+ */
+
+	void
+cfb64_encrypt(s, c)
+	register unsigned char *s;
+	int c;
+{
+	register struct stinfo *stp = &fb[CFB].streams[DIR_ENCRYPT-1];
+	register int index;
+
+	index = stp->str_index;
+	while (c-- > 0) {
+		if (index == sizeof(Block)) {
+			Block b;
+			des_ecb_encrypt(stp->str_output, b, stp->str_sched, 1);
+			memmove((void *)stp->str_feed, (void *)b, sizeof(Block));
+			index = 0;
+		}
+
+		/* On encryption, we store (feed ^ data) which is cypher */
+		*s = stp->str_output[index] = (stp->str_feed[index] ^ *s);
+		s++;
+		index++;
+	}
+	stp->str_index = index;
+}
+
+	int
+cfb64_decrypt(data)
+	int data;
+{
+	register struct stinfo *stp = &fb[CFB].streams[DIR_DECRYPT-1];
+	int index;
+
+	if (data == -1) {
+		/*
+		 * Back up one byte.  It is assumed that we will
+		 * never back up more than one byte.  If we do, this
+		 * may or may not work.
+		 */
+		if (stp->str_index)
+			--stp->str_index;
+		return(0);
+	}
+
+	index = stp->str_index++;
+	if (index == sizeof(Block)) {
+		Block b;
+		des_ecb_encrypt(stp->str_output, b, stp->str_sched, 1);
+		memmove((void *)stp->str_feed, (void *)b, sizeof(Block));
+		stp->str_index = 1;	/* Next time will be 1 */
+		index = 0;		/* But now use 0 */
+	}
+
+	/* On decryption we store (data) which is cypher. */
+	stp->str_output[index] = data;
+	return(data ^ stp->str_feed[index]);
+}
+
+/*
+ * DES 64 bit Output Feedback
+ *
+ * key --->+-----+
+ *	+->| DES |--+
+ *	|  +-----+  |
+ *	+-----------+
+ *	            v
+ *  INPUT -------->(+) ----> DATA
+ *
+ * Given:
+ *	iV: Initial vector, 64 bits (8 bytes) long.
+ *	Dn: the nth chunk of 64 bits (8 bytes) of data to encrypt (decrypt).
+ *	On: the nth chunk of 64 bits (8 bytes) of encrypted (decrypted) output.
+ *
+ *	V0 = DES(iV, key)
+ *	V(n+1) = DES(Vn, key)
+ *	On = Dn ^ Vn
+ */
+	void
+ofb64_encrypt(s, c)
+	register unsigned char *s;
+	int c;
+{
+	register struct stinfo *stp = &fb[OFB].streams[DIR_ENCRYPT-1];
+	register int index;
+
+	index = stp->str_index;
+	while (c-- > 0) {
+		if (index == sizeof(Block)) {
+			Block b;
+			des_ecb_encrypt(stp->str_feed, b, stp->str_sched, 1);
+			memmove((void *)stp->str_feed, (void *)b, sizeof(Block));
+			index = 0;
+		}
+		*s++ ^= stp->str_feed[index];
+		index++;
+	}
+	stp->str_index = index;
+}
+
+	int
+ofb64_decrypt(data)
+	int data;
+{
+	register struct stinfo *stp = &fb[OFB].streams[DIR_DECRYPT-1];
+	int index;
+
+	if (data == -1) {
+		/*
+		 * Back up one byte.  It is assumed that we will
+		 * never back up more than one byte.  If we do, this
+		 * may or may not work.
+		 */
+		if (stp->str_index)
+			--stp->str_index;
+		return(0);
+	}
+
+	index = stp->str_index++;
+	if (index == sizeof(Block)) {
+		Block b;
+		des_ecb_encrypt(stp->str_feed, b, stp->str_sched, 1);
+		memmove((void *)stp->str_feed, (void *)b, sizeof(Block));
+		stp->str_index = 1;	/* Next time will be 1 */
+		index = 0;		/* But now use 0 */
+	}
+
+	return(data ^ stp->str_feed[index]);
+}
+#  endif /* DES_ENCRYPTION */
+# endif	/* AUTHENTICATION */
+#endif	/* ENCRYPTION */
diff --git a/contrib/telnet/libtelnet/encrypt.c b/contrib/telnet/libtelnet/encrypt.c
new file mode 100644
index 0000000..432df0c
--- /dev/null
+++ b/contrib/telnet/libtelnet/encrypt.c
@@ -0,0 +1,1000 @@
+/*-
+ * Copyright (c) 1991, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef lint
+static char sccsid[] = "@(#)encrypt.c	8.2 (Berkeley) 5/30/95";
+#endif /* not lint */
+
+/*
+ * Copyright (C) 1990 by the Massachusetts Institute of Technology
+ *
+ * Export of this software from the United States of America is assumed
+ * to require a specific license from the United States Government.
+ * It is the responsibility of any person or organization contemplating
+ * export to obtain such a license before exporting.
+ *
+ * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
+ * distribute this software and its documentation for any purpose and
+ * without fee is hereby granted, provided that the above copyright
+ * notice appear in all copies and that both that copyright notice and
+ * this permission notice appear in supporting documentation, and that
+ * the name of M.I.T. not be used in advertising or publicity pertaining
+ * to distribution of the software without specific, written prior
+ * permission.  M.I.T. makes no representations about the suitability of
+ * this software for any purpose.  It is provided "as is" without express
+ * or implied warranty.
+ */
+
+#ifdef	ENCRYPTION
+
+#define	ENCRYPT_NAMES
+#include <arpa/telnet.h>
+
+#include "encrypt.h"
+#include "misc.h"
+
+#ifdef	__STDC__
+#include <stdlib.h>
+#endif
+#ifdef	NO_STRING_H
+#include <strings.h>
+#else
+#include <string.h>
+#endif
+
+/*
+ * These functions pointers point to the current routines
+ * for encrypting and decrypting data.
+ */
+void	(*encrypt_output) P((unsigned char *, int));
+int	(*decrypt_input) P((int));
+
+int encrypt_debug_mode = 0;
+static int decrypt_mode = 0;
+static int encrypt_mode = 0;
+static int encrypt_verbose = 0;
+static int autoencrypt = 0;
+static int autodecrypt = 0;
+static int havesessionkey = 0;
+static int Server = 0;
+static char *Name = "Noname";
+
+#define	typemask(x)	((x) > 0 ? 1 << ((x)-1) : 0)
+
+static long i_support_encrypt = typemask(ENCTYPE_DES_CFB64)
+				| typemask(ENCTYPE_DES_OFB64);
+static long i_support_decrypt = typemask(ENCTYPE_DES_CFB64)
+				| typemask(ENCTYPE_DES_OFB64);
+static long i_wont_support_encrypt = 0;
+static long i_wont_support_decrypt = 0;
+#define	I_SUPPORT_ENCRYPT	(i_support_encrypt & ~i_wont_support_encrypt)
+#define	I_SUPPORT_DECRYPT	(i_support_decrypt & ~i_wont_support_decrypt)
+
+static long remote_supports_encrypt = 0;
+static long remote_supports_decrypt = 0;
+
+static Encryptions encryptions[] = {
+#ifdef	DES_ENCRYPTION
+    { "DES_CFB64",	ENCTYPE_DES_CFB64,
+			cfb64_encrypt,
+			cfb64_decrypt,
+			cfb64_init,
+			cfb64_start,
+			cfb64_is,
+			cfb64_reply,
+			cfb64_session,
+			cfb64_keyid,
+			cfb64_printsub },
+    { "DES_OFB64",	ENCTYPE_DES_OFB64,
+			ofb64_encrypt,
+			ofb64_decrypt,
+			ofb64_init,
+			ofb64_start,
+			ofb64_is,
+			ofb64_reply,
+			ofb64_session,
+			ofb64_keyid,
+			ofb64_printsub },
+#endif	/* DES_ENCRYPTION */
+    { 0, },
+};
+
+static unsigned char str_send[64] = { IAC, SB, TELOPT_ENCRYPT,
+					 ENCRYPT_SUPPORT };
+static unsigned char str_suplen = 0;
+static unsigned char str_start[72] = { IAC, SB, TELOPT_ENCRYPT };
+static unsigned char str_end[] = { IAC, SB, TELOPT_ENCRYPT, 0, IAC, SE };
+
+	Encryptions *
+findencryption(type)
+	int type;
+{
+	Encryptions *ep = encryptions;
+
+	if (!(I_SUPPORT_ENCRYPT & remote_supports_decrypt & typemask(type)))
+		return(0);
+	while (ep->type && ep->type != type)
+		++ep;
+	return(ep->type ? ep : 0);
+}
+
+	Encryptions *
+finddecryption(type)
+	int type;
+{
+	Encryptions *ep = encryptions;
+
+	if (!(I_SUPPORT_DECRYPT & remote_supports_encrypt & typemask(type)))
+		return(0);
+	while (ep->type && ep->type != type)
+		++ep;
+	return(ep->type ? ep : 0);
+}
+
+#define	MAXKEYLEN 64
+
+static struct key_info {
+	unsigned char keyid[MAXKEYLEN];
+	int keylen;
+	int dir;
+	int *modep;
+	Encryptions *(*getcrypt)();
+} ki[2] = {
+	{ { 0 }, 0, DIR_ENCRYPT, &encrypt_mode, findencryption },
+	{ { 0 }, 0, DIR_DECRYPT, &decrypt_mode, finddecryption },
+};
+
+	void
+encrypt_init(name, server)
+	char *name;
+	int server;
+{
+	Encryptions *ep = encryptions;
+
+	Name = name;
+	Server = server;
+	i_support_encrypt = i_support_decrypt = 0;
+	remote_supports_encrypt = remote_supports_decrypt = 0;
+	encrypt_mode = 0;
+	decrypt_mode = 0;
+	encrypt_output = 0;
+	decrypt_input = 0;
+#ifdef notdef
+	encrypt_verbose = !server;
+#endif
+
+	str_suplen = 4;
+
+	while (ep->type) {
+		if (encrypt_debug_mode)
+			printf(">>>%s: I will support %s\r\n",
+				Name, ENCTYPE_NAME(ep->type));
+		i_support_encrypt |= typemask(ep->type);
+		i_support_decrypt |= typemask(ep->type);
+		if ((i_wont_support_decrypt & typemask(ep->type)) == 0)
+			if ((str_send[str_suplen++] = ep->type) == IAC)
+				str_send[str_suplen++] = IAC;
+		if (ep->init)
+			(*ep->init)(Server);
+		++ep;
+	}
+	str_send[str_suplen++] = IAC;
+	str_send[str_suplen++] = SE;
+}
+
+	void
+encrypt_list_types()
+{
+	Encryptions *ep = encryptions;
+
+	printf("Valid encryption types:\n");
+	while (ep->type) {
+		printf("\t%s (%d)\r\n", ENCTYPE_NAME(ep->type), ep->type);
+		++ep;
+	}
+}
+
+	int
+EncryptEnable(type, mode)
+	char *type, *mode;
+{
+	if (isprefix(type, "help") || isprefix(type, "?")) {
+		printf("Usage: encrypt enable <type> [input|output]\n");
+		encrypt_list_types();
+		return(0);
+	}
+	if (EncryptType(type, mode))
+		return(EncryptStart(mode));
+	return(0);
+}
+
+	int
+EncryptDisable(type, mode)
+	char *type, *mode;
+{
+	register Encryptions *ep;
+	int ret = 0;
+
+	if (isprefix(type, "help") || isprefix(type, "?")) {
+		printf("Usage: encrypt disable <type> [input|output]\n");
+		encrypt_list_types();
+	} else if ((ep = (Encryptions *)genget(type, encryptions,
+						sizeof(Encryptions))) == 0) {
+		printf("%s: invalid encryption type\n", type);
+	} else if (Ambiguous(ep)) {
+		printf("Ambiguous type '%s'\n", type);
+	} else {
+		if ((mode == 0) || (isprefix(mode, "input") ? 1 : 0)) {
+			if (decrypt_mode == ep->type)
+				EncryptStopInput();
+			i_wont_support_decrypt |= typemask(ep->type);
+			ret = 1;
+		}
+		if ((mode == 0) || (isprefix(mode, "output"))) {
+			if (encrypt_mode == ep->type)
+				EncryptStopOutput();
+			i_wont_support_encrypt |= typemask(ep->type);
+			ret = 1;
+		}
+		if (ret == 0)
+			printf("%s: invalid encryption mode\n", mode);
+	}
+	return(ret);
+}
+
+	int
+EncryptType(type, mode)
+	char *type;
+	char *mode;
+{
+	register Encryptions *ep;
+	int ret = 0;
+
+	if (isprefix(type, "help") || isprefix(type, "?")) {
+		printf("Usage: encrypt type <type> [input|output]\n");
+		encrypt_list_types();
+	} else if ((ep = (Encryptions *)genget(type, encryptions,
+						sizeof(Encryptions))) == 0) {
+		printf("%s: invalid encryption type\n", type);
+	} else if (Ambiguous(ep)) {
+		printf("Ambiguous type '%s'\n", type);
+	} else {
+		if ((mode == 0) || isprefix(mode, "input")) {
+			decrypt_mode = ep->type;
+			i_wont_support_decrypt &= ~typemask(ep->type);
+			ret = 1;
+		}
+		if ((mode == 0) || isprefix(mode, "output")) {
+			encrypt_mode = ep->type;
+			i_wont_support_encrypt &= ~typemask(ep->type);
+			ret = 1;
+		}
+		if (ret == 0)
+			printf("%s: invalid encryption mode\n", mode);
+	}
+	return(ret);
+}
+
+	int
+EncryptStart(mode)
+	char *mode;
+{
+	register int ret = 0;
+	if (mode) {
+		if (isprefix(mode, "input"))
+			return(EncryptStartInput());
+		if (isprefix(mode, "output"))
+			return(EncryptStartOutput());
+		if (isprefix(mode, "help") || isprefix(mode, "?")) {
+			printf("Usage: encrypt start [input|output]\n");
+			return(0);
+		}
+		printf("%s: invalid encryption mode 'encrypt start ?' for help\n", mode);
+		return(0);
+	}
+	ret += EncryptStartInput();
+	ret += EncryptStartOutput();
+	return(ret);
+}
+
+	int
+EncryptStartInput()
+{
+	if (decrypt_mode) {
+		encrypt_send_request_start();
+		return(1);
+	}
+	printf("No previous decryption mode, decryption not enabled\r\n");
+	return(0);
+}
+
+	int
+EncryptStartOutput()
+{
+	if (encrypt_mode) {
+		encrypt_start_output(encrypt_mode);
+		return(1);
+	}
+	printf("No previous encryption mode, encryption not enabled\r\n");
+	return(0);
+}
+
+	int
+EncryptStop(mode)
+	char *mode;
+{
+	int ret = 0;
+	if (mode) {
+		if (isprefix(mode, "input"))
+			return(EncryptStopInput());
+		if (isprefix(mode, "output"))
+			return(EncryptStopOutput());
+		if (isprefix(mode, "help") || isprefix(mode, "?")) {
+			printf("Usage: encrypt stop [input|output]\n");
+			return(0);
+		}
+		printf("%s: invalid encryption mode 'encrypt stop ?' for help\n", mode);
+		return(0);
+	}
+	ret += EncryptStopInput();
+	ret += EncryptStopOutput();
+	return(ret);
+}
+
+	int
+EncryptStopInput()
+{
+	encrypt_send_request_end();
+	return(1);
+}
+
+	int
+EncryptStopOutput()
+{
+	encrypt_send_end();
+	return(1);
+}
+
+	void
+encrypt_display()
+{
+	if (encrypt_output)
+		printf("Currently encrypting output with %s\r\n",
+			ENCTYPE_NAME(encrypt_mode));
+	if (decrypt_input)
+		printf("Currently decrypting input with %s\r\n",
+			ENCTYPE_NAME(decrypt_mode));
+}
+
+	int
+EncryptStatus()
+{
+	if (encrypt_output)
+		printf("Currently encrypting output with %s\r\n",
+			ENCTYPE_NAME(encrypt_mode));
+	else if (encrypt_mode) {
+		printf("Currently output is clear text.\r\n");
+		printf("Last encryption mode was %s\r\n",
+			ENCTYPE_NAME(encrypt_mode));
+	}
+	if (decrypt_input) {
+		printf("Currently decrypting input with %s\r\n",
+			ENCTYPE_NAME(decrypt_mode));
+	} else if (decrypt_mode) {
+		printf("Currently input is clear text.\r\n");
+		printf("Last decryption mode was %s\r\n",
+			ENCTYPE_NAME(decrypt_mode));
+	}
+	return 1;
+}
+
+	void
+encrypt_send_support()
+{
+	if (str_suplen) {
+		/*
+		 * If the user has requested that decryption start
+		 * immediatly, then send a "REQUEST START" before
+		 * we negotiate the type.
+		 */
+		if (!Server && autodecrypt)
+			encrypt_send_request_start();
+		net_write(str_send, str_suplen);
+		printsub('>', &str_send[2], str_suplen - 2);
+		str_suplen = 0;
+	}
+}
+
+	int
+EncryptDebug(on)
+	int on;
+{
+	if (on < 0)
+		encrypt_debug_mode ^= 1;
+	else
+		encrypt_debug_mode = on;
+	printf("Encryption debugging %s\r\n",
+		encrypt_debug_mode ? "enabled" : "disabled");
+	return(1);
+}
+
+	int
+EncryptVerbose(on)
+	int on;
+{
+	if (on < 0)
+		encrypt_verbose ^= 1;
+	else
+		encrypt_verbose = on;
+	printf("Encryption %s verbose\r\n",
+		encrypt_verbose ? "is" : "is not");
+	return(1);
+}
+
+	int
+EncryptAutoEnc(on)
+	int on;
+{
+	encrypt_auto(on);
+	printf("Automatic encryption of output is %s\r\n",
+		autoencrypt ? "enabled" : "disabled");
+	return(1);
+}
+
+	int
+EncryptAutoDec(on)
+	int on;
+{
+	decrypt_auto(on);
+	printf("Automatic decryption of input is %s\r\n",
+		autodecrypt ? "enabled" : "disabled");
+	return(1);
+}
+
+/*
+ * Called when ENCRYPT SUPPORT is received.
+ */
+	void
+encrypt_support(typelist, cnt)
+	unsigned char *typelist;
+	int cnt;
+{
+	register int type, use_type = 0;
+	Encryptions *ep;
+
+	/*
+	 * Forget anything the other side has previously told us.
+	 */
+	remote_supports_decrypt = 0;
+
+	while (cnt-- > 0) {
+		type = *typelist++;
+		if (encrypt_debug_mode)
+			printf(">>>%s: He is supporting %s (%d)\r\n",
+				Name,
+				ENCTYPE_NAME(type), type);
+		if ((type < ENCTYPE_CNT) &&
+		    (I_SUPPORT_ENCRYPT & typemask(type))) {
+			remote_supports_decrypt |= typemask(type);
+			if (use_type == 0)
+				use_type = type;
+		}
+	}
+	if (use_type) {
+		ep = findencryption(use_type);
+		if (!ep)
+			return;
+		type = ep->start ? (*ep->start)(DIR_ENCRYPT, Server) : 0;
+		if (encrypt_debug_mode)
+			printf(">>>%s: (*ep->start)() returned %d\r\n",
+					Name, type);
+		if (type < 0)
+			return;
+		encrypt_mode = use_type;
+		if (type == 0)
+			encrypt_start_output(use_type);
+	}
+}
+
+	void
+encrypt_is(data, cnt)
+	unsigned char *data;
+	int cnt;
+{
+	Encryptions *ep;
+	register int type, ret;
+
+	if (--cnt < 0)
+		return;
+	type = *data++;
+	if (type < ENCTYPE_CNT)
+		remote_supports_encrypt |= typemask(type);
+	if (!(ep = finddecryption(type))) {
+		if (encrypt_debug_mode)
+			printf(">>>%s: Can't find type %s (%d) for initial negotiation\r\n",
+				Name,
+				ENCTYPE_NAME_OK(type)
+					? ENCTYPE_NAME(type) : "(unknown)",
+				type);
+		return;
+	}
+	if (!ep->is) {
+		if (encrypt_debug_mode)
+			printf(">>>%s: No initial negotiation needed for type %s (%d)\r\n",
+				Name,
+				ENCTYPE_NAME_OK(type)
+					? ENCTYPE_NAME(type) : "(unknown)",
+				type);
+		ret = 0;
+	} else {
+		ret = (*ep->is)(data, cnt);
+		if (encrypt_debug_mode)
+			printf("(*ep->is)(%x, %d) returned %s(%d)\n", data, cnt,
+				(ret < 0) ? "FAIL " :
+				(ret == 0) ? "SUCCESS " : "MORE_TO_DO ", ret);
+	}
+	if (ret < 0) {
+		autodecrypt = 0;
+	} else {
+		decrypt_mode = type;
+		if (ret == 0 && autodecrypt)
+			encrypt_send_request_start();
+	}
+}
+
+	void
+encrypt_reply(data, cnt)
+	unsigned char *data;
+	int cnt;
+{
+	Encryptions *ep;
+	register int ret, type;
+
+	if (--cnt < 0)
+		return;
+	type = *data++;
+	if (!(ep = findencryption(type))) {
+		if (encrypt_debug_mode)
+			printf(">>>%s: Can't find type %s (%d) for initial negotiation\r\n",
+				Name,
+				ENCTYPE_NAME_OK(type)
+					? ENCTYPE_NAME(type) : "(unknown)",
+				type);
+		return;
+	}
+	if (!ep->reply) {
+		if (encrypt_debug_mode)
+			printf(">>>%s: No initial negotiation needed for type %s (%d)\r\n",
+				Name,
+				ENCTYPE_NAME_OK(type)
+					? ENCTYPE_NAME(type) : "(unknown)",
+				type);
+		ret = 0;
+	} else {
+		ret = (*ep->reply)(data, cnt);
+		if (encrypt_debug_mode)
+			printf("(*ep->reply)(%x, %d) returned %s(%d)\n",
+				data, cnt,
+				(ret < 0) ? "FAIL " :
+				(ret == 0) ? "SUCCESS " : "MORE_TO_DO ", ret);
+	}
+	if (encrypt_debug_mode)
+		printf(">>>%s: encrypt_reply returned %d\n", Name, ret);
+	if (ret < 0) {
+		autoencrypt = 0;
+	} else {
+		encrypt_mode = type;
+		if (ret == 0 && autoencrypt)
+			encrypt_start_output(type);
+	}
+}
+
+/*
+ * Called when a ENCRYPT START command is received.
+ */
+	void
+encrypt_start(data, cnt)
+	unsigned char *data;
+	int cnt;
+{
+	Encryptions *ep;
+
+	if (!decrypt_mode) {
+		/*
+		 * Something is wrong.  We should not get a START
+		 * command without having already picked our
+		 * decryption scheme.  Send a REQUEST-END to
+		 * attempt to clear the channel...
+		 */
+		printf("%s: Warning, Cannot decrypt input stream!!!\r\n", Name);
+		encrypt_send_request_end();
+		return;
+	}
+
+	if (ep = finddecryption(decrypt_mode)) {
+		decrypt_input = ep->input;
+		if (encrypt_verbose)
+			printf("[ Input is now decrypted with type %s ]\r\n",
+				ENCTYPE_NAME(decrypt_mode));
+		if (encrypt_debug_mode)
+			printf(">>>%s: Start to decrypt input with type %s\r\n",
+				Name, ENCTYPE_NAME(decrypt_mode));
+	} else {
+		printf("%s: Warning, Cannot decrypt type %s (%d)!!!\r\n",
+				Name,
+				ENCTYPE_NAME_OK(decrypt_mode)
+					? ENCTYPE_NAME(decrypt_mode)
+					: "(unknown)",
+				decrypt_mode);
+		encrypt_send_request_end();
+	}
+}
+
+	void
+encrypt_session_key(key, server)
+	Session_Key *key;
+	int server;
+{
+	Encryptions *ep = encryptions;
+
+	havesessionkey = 1;
+
+	while (ep->type) {
+		if (ep->session)
+			(*ep->session)(key, server);
+#ifdef notdef
+		if (!encrypt_output && autoencrypt && !server)
+			encrypt_start_output(ep->type);
+		if (!decrypt_input && autodecrypt && !server)
+			encrypt_send_request_start();
+#endif
+		++ep;
+	}
+}
+
+/*
+ * Called when ENCRYPT END is received.
+ */
+	void
+encrypt_end()
+{
+	decrypt_input = 0;
+	if (encrypt_debug_mode)
+		printf(">>>%s: Input is back to clear text\r\n", Name);
+	if (encrypt_verbose)
+		printf("[ Input is now clear text ]\r\n");
+}
+
+/*
+ * Called when ENCRYPT REQUEST-END is received.
+ */
+	void
+encrypt_request_end()
+{
+	encrypt_send_end();
+}
+
+/*
+ * Called when ENCRYPT REQUEST-START is received.  If we receive
+ * this before a type is picked, then that indicates that the
+ * other side wants us to start encrypting data as soon as we
+ * can.
+ */
+	void
+encrypt_request_start(data, cnt)
+	unsigned char *data;
+	int cnt;
+{
+	if (encrypt_mode == 0)  {
+		if (Server)
+			autoencrypt = 1;
+		return;
+	}
+	encrypt_start_output(encrypt_mode);
+}
+
+static unsigned char str_keyid[(MAXKEYLEN*2)+5] = { IAC, SB, TELOPT_ENCRYPT };
+
+encrypt_enc_keyid(keyid, len)
+	unsigned char *keyid;
+	int len;
+{
+	encrypt_keyid(&ki[1], keyid, len);
+}
+
+encrypt_dec_keyid(keyid, len)
+	unsigned char *keyid;
+	int len;
+{
+	encrypt_keyid(&ki[0], keyid, len);
+}
+
+encrypt_keyid(kp, keyid, len)
+	struct key_info *kp;
+	unsigned char *keyid;
+	int len;
+{
+	Encryptions *ep;
+	unsigned char *strp, *cp;
+	int dir = kp->dir;
+	register int ret = 0;
+
+	if (!(ep = (*kp->getcrypt)(*kp->modep))) {
+		if (len == 0)
+			return;
+		kp->keylen = 0;
+	} else if (len == 0) {
+		/*
+		 * Empty option, indicates a failure.
+		 */
+		if (kp->keylen == 0)
+			return;
+		kp->keylen = 0;
+		if (ep->keyid)
+			(void)(*ep->keyid)(dir, kp->keyid, &kp->keylen);
+
+	} else if ((len != kp->keylen) ||
+		   (memcmp(keyid, kp->keyid, len) != 0)) {
+		/*
+		 * Length or contents are different
+		 */
+		kp->keylen = len;
+		memmove(kp->keyid, keyid, len);
+		if (ep->keyid)
+			(void)(*ep->keyid)(dir, kp->keyid, &kp->keylen);
+	} else {
+		if (ep->keyid)
+			ret = (*ep->keyid)(dir, kp->keyid, &kp->keylen);
+		if ((ret == 0) && (dir == DIR_ENCRYPT) && autoencrypt)
+			encrypt_start_output(*kp->modep);
+		return;
+	}
+
+	encrypt_send_keyid(dir, kp->keyid, kp->keylen, 0);
+}
+
+	void
+encrypt_send_keyid(dir, keyid, keylen, saveit)
+	int dir;
+	unsigned char *keyid;
+	int keylen;
+	int saveit;
+{
+	unsigned char *strp;
+
+	str_keyid[3] = (dir == DIR_ENCRYPT)
+			? ENCRYPT_ENC_KEYID : ENCRYPT_DEC_KEYID;
+	if (saveit) {
+		struct key_info *kp = &ki[(dir == DIR_ENCRYPT) ? 0 : 1];
+		memmove(kp->keyid, keyid, keylen);
+		kp->keylen = keylen;
+	}
+
+	for (strp = &str_keyid[4]; keylen > 0; --keylen) {
+		if ((*strp++ = *keyid++) == IAC)
+			*strp++ = IAC;
+	}
+	*strp++ = IAC;
+	*strp++ = SE;
+	net_write(str_keyid, strp - str_keyid);
+	printsub('>', &str_keyid[2], strp - str_keyid - 2);
+}
+
+	void
+encrypt_auto(on)
+	int on;
+{
+	if (on < 0)
+		autoencrypt ^= 1;
+	else
+		autoencrypt = on ? 1 : 0;
+}
+
+	void
+decrypt_auto(on)
+	int on;
+{
+	if (on < 0)
+		autodecrypt ^= 1;
+	else
+		autodecrypt = on ? 1 : 0;
+}
+
+	void
+encrypt_start_output(type)
+	int type;
+{
+	Encryptions *ep;
+	register unsigned char *p;
+	register int i;
+
+	if (!(ep = findencryption(type))) {
+		if (encrypt_debug_mode) {
+			printf(">>>%s: Can't encrypt with type %s (%d)\r\n",
+				Name,
+				ENCTYPE_NAME_OK(type)
+					? ENCTYPE_NAME(type) : "(unknown)",
+				type);
+		}
+		return;
+	}
+	if (ep->start) {
+		i = (*ep->start)(DIR_ENCRYPT, Server);
+		if (encrypt_debug_mode) {
+			printf(">>>%s: Encrypt start: %s (%d) %s\r\n",
+				Name,
+				(i < 0) ? "failed" :
+					"initial negotiation in progress",
+				i, ENCTYPE_NAME(type));
+		}
+		if (i)
+			return;
+	}
+	p = str_start + 3;
+	*p++ = ENCRYPT_START;
+	for (i = 0; i < ki[0].keylen; ++i) {
+		if ((*p++ = ki[0].keyid[i]) == IAC)
+			*p++ = IAC;
+	}
+	*p++ = IAC;
+	*p++ = SE;
+	net_write(str_start, p - str_start);
+	net_encrypt();
+	printsub('>', &str_start[2], p - &str_start[2]);
+	/*
+	 * If we are already encrypting in some mode, then
+	 * encrypt the ring (which includes our request) in
+	 * the old mode, mark it all as "clear text" and then
+	 * switch to the new mode.
+	 */
+	encrypt_output = ep->output;
+	encrypt_mode = type;
+	if (encrypt_debug_mode)
+		printf(">>>%s: Started to encrypt output with type %s\r\n",
+			Name, ENCTYPE_NAME(type));
+	if (encrypt_verbose)
+		printf("[ Output is now encrypted with type %s ]\r\n",
+			ENCTYPE_NAME(type));
+}
+
+	void
+encrypt_send_end()
+{
+	if (!encrypt_output)
+		return;
+
+	str_end[3] = ENCRYPT_END;
+	net_write(str_end, sizeof(str_end));
+	net_encrypt();
+	printsub('>', &str_end[2], sizeof(str_end) - 2);
+	/*
+	 * Encrypt the output buffer now because it will not be done by
+	 * netflush...
+	 */
+	encrypt_output = 0;
+	if (encrypt_debug_mode)
+		printf(">>>%s: Output is back to clear text\r\n", Name);
+	if (encrypt_verbose)
+		printf("[ Output is now clear text ]\r\n");
+}
+
+	void
+encrypt_send_request_start()
+{
+	register unsigned char *p;
+	register int i;
+
+	p = &str_start[3];
+	*p++ = ENCRYPT_REQSTART;
+	for (i = 0; i < ki[1].keylen; ++i) {
+		if ((*p++ = ki[1].keyid[i]) == IAC)
+			*p++ = IAC;
+	}
+	*p++ = IAC;
+	*p++ = SE;
+	net_write(str_start, p - str_start);
+	printsub('>', &str_start[2], p - &str_start[2]);
+	if (encrypt_debug_mode)
+		printf(">>>%s: Request input to be encrypted\r\n", Name);
+}
+
+	void
+encrypt_send_request_end()
+{
+	str_end[3] = ENCRYPT_REQEND;
+	net_write(str_end, sizeof(str_end));
+	printsub('>', &str_end[2], sizeof(str_end) - 2);
+
+	if (encrypt_debug_mode)
+		printf(">>>%s: Request input to be clear text\r\n", Name);
+}
+
+	void
+encrypt_wait()
+{
+	register int encrypt, decrypt;
+	if (encrypt_debug_mode)
+		printf(">>>%s: in encrypt_wait\r\n", Name);
+	if (!havesessionkey || !(I_SUPPORT_ENCRYPT & remote_supports_decrypt))
+		return;
+	while (autoencrypt && !encrypt_output)
+		if (telnet_spin())
+			return;
+}
+
+	void
+encrypt_debug(mode)
+	int mode;
+{
+	encrypt_debug_mode = mode;
+}
+
+	void
+encrypt_gen_printsub(data, cnt, buf, buflen)
+	unsigned char *data, *buf;
+	int cnt, buflen;
+{
+	char tbuf[16], *cp;
+
+	cnt -= 2;
+	data += 2;
+	buf[buflen-1] = '\0';
+	buf[buflen-2] = '*';
+	buflen -= 2;;
+	for (; cnt > 0; cnt--, data++) {
+		sprintf(tbuf, " %d", *data);
+		for (cp = tbuf; *cp && buflen > 0; --buflen)
+			*buf++ = *cp++;
+		if (buflen <= 0)
+			return;
+	}
+	*buf = '\0';
+}
+
+	void
+encrypt_printsub(data, cnt, buf, buflen)
+	unsigned char *data, *buf;
+	int cnt, buflen;
+{
+	Encryptions *ep;
+	register int type = data[1];
+
+	for (ep = encryptions; ep->type && ep->type != type; ep++)
+		;
+
+	if (ep->printsub)
+		(*ep->printsub)(data, cnt, buf, buflen);
+	else
+		encrypt_gen_printsub(data, cnt, buf, buflen);
+}
+#endif	/* ENCRYPTION */
diff --git a/contrib/telnet/libtelnet/encrypt.h b/contrib/telnet/libtelnet/encrypt.h
new file mode 100644
index 0000000..e0ae385
--- /dev/null
+++ b/contrib/telnet/libtelnet/encrypt.h
@@ -0,0 +1,108 @@
+/*-
+ * Copyright (c) 1991, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *	@(#)encrypt.h	8.1 (Berkeley) 6/4/93
+ */
+
+/*
+ * Copyright (C) 1990 by the Massachusetts Institute of Technology
+ *
+ * Export of this software from the United States of America is assumed
+ * to require a specific license from the United States Government.
+ * It is the responsibility of any person or organization contemplating
+ * export to obtain such a license before exporting.
+ *
+ * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
+ * distribute this software and its documentation for any purpose and
+ * without fee is hereby granted, provided that the above copyright
+ * notice appear in all copies and that both that copyright notice and
+ * this permission notice appear in supporting documentation, and that
+ * the name of M.I.T. not be used in advertising or publicity pertaining
+ * to distribution of the software without specific, written prior
+ * permission.  M.I.T. makes no representations about the suitability of
+ * this software for any purpose.  It is provided "as is" without express
+ * or implied warranty.
+ */
+
+#ifdef	ENCRYPTION
+# ifndef __ENCRYPTION__
+# define __ENCRYPTION__
+
+#define	DIR_DECRYPT		1
+#define	DIR_ENCRYPT		2
+
+typedef	unsigned char Block[8];
+typedef unsigned char *BlockT;
+typedef struct { Block _; } Schedule[16];
+
+#define	VALIDKEY(key)	( key[0] | key[1] | key[2] | key[3] | \
+			  key[4] | key[5] | key[6] | key[7])
+
+#define	SAMEKEY(k1, k2)	(!bcmp((void *)k1, (void *)k2, sizeof(Block)))
+
+typedef	struct {
+	short		type;
+	int		length;
+	unsigned char	*data;
+} Session_Key;
+
+# if !defined(P)
+#  ifdef __STDC__
+#   define P(x)	x
+#  else
+#   define P(x)	()
+#  endif
+# endif
+
+typedef struct {
+	char	*name;
+	int	type;
+	void	(*output) P((unsigned char *, int));
+	int	(*input) P((int));
+	void	(*init) P((int));
+	int	(*start) P((int, int));
+	int	(*is) P((unsigned char *, int));
+	int	(*reply) P((unsigned char *, int));
+	void	(*session) P((Session_Key *, int));
+	int	(*keyid) P((int, unsigned char *, int *));
+	void	(*printsub) P((unsigned char *, int, unsigned char *, int));
+} Encryptions;
+
+#define	SK_DES		1	/* Matched Kerberos v5 KEYTYPE_DES */
+
+#include "enc-proto.h"
+
+extern int encrypt_debug_mode;
+extern int (*decrypt_input) P((int));
+extern void (*encrypt_output) P((unsigned char *, int));
+# endif /* __ENCRYPTION__ */
+#endif /* ENCRYPTION */
diff --git a/contrib/telnet/libtelnet/genget.c b/contrib/telnet/libtelnet/genget.c
new file mode 100644
index 0000000..7be3846
--- /dev/null
+++ b/contrib/telnet/libtelnet/genget.c
@@ -0,0 +1,105 @@
+/*-
+ * Copyright (c) 1991, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef lint
+static char sccsid[] = "@(#)genget.c	8.2 (Berkeley) 5/30/95";
+#endif /* not lint */
+
+
+#include <ctype.h>
+
+#define	LOWER(x) (isupper(x) ? tolower(x) : (x))
+/*
+ * The prefix function returns 0 if *s1 is not a prefix
+ * of *s2.  If *s1 exactly matches *s2, the negative of
+ * the length is returned.  If *s1 is a prefix of *s2,
+ * the length of *s1 is returned.
+ */
+	int
+isprefix(s1, s2)
+	register char *s1, *s2;
+{
+	register int n = 0;
+	char *os1;
+	register char c1, c2;
+
+	if (*s1 == '\0')
+		return(-1);
+	os1 = s1;
+	c1 = *s1;
+	c2 = *s2;
+	while (LOWER(c1) == LOWER(c2)) {
+		if (c1 == '\0')
+			break;
+		c1 = *++s1;
+		c2 = *++s2;
+	}
+	return(*s1 ? 0 : (*s2 ? (s1 - os1) : (os1 - s1)));
+}
+
+static char *ambiguous;		/* special return value for command routines */
+
+	char **
+genget(name, table, stlen)
+	char	*name;		/* name to match */
+	char	**table;	/* name entry in table */
+	int	stlen;
+{
+	register char **c, **found;
+	register int n;
+
+	if (name == 0)
+	    return 0;
+
+	found = 0;
+	for (c = table; *c != 0; c = (char **)((char *)c + stlen)) {
+		if ((n = isprefix(name, *c)) == 0)
+			continue;
+		if (n < 0)		/* exact match */
+			return(c);
+		if (found)
+			return(&ambiguous);
+		found = c;
+	}
+	return(found);
+}
+
+/*
+ * Function call version of Ambiguous()
+ */
+	int
+Ambiguous(s)
+	char *s;
+{
+	return((char **)s == &ambiguous);
+}
diff --git a/contrib/telnet/libtelnet/getent.c b/contrib/telnet/libtelnet/getent.c
new file mode 100644
index 0000000..05626f1
--- /dev/null
+++ b/contrib/telnet/libtelnet/getent.c
@@ -0,0 +1,68 @@
+/*-
+ * Copyright (c) 1991, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef lint
+static char sccsid[] = "@(#)getent.c	8.2 (Berkeley) 12/15/93";
+#endif /* not lint */
+
+static char *area;
+
+/*ARGSUSED*/
+getent(cp, name)
+char *cp, *name;
+{
+#ifdef	HAS_CGETENT
+	char *dba[2];
+
+	dba[0] = "/etc/gettytab";
+	dba[1] = 0;
+	return((cgetent(&area, dba, name) == 0) ? 1 : 0);
+#else
+	return(0);
+#endif
+}
+
+#ifndef	SOLARIS
+/*ARGSUSED*/
+char *
+getstr(id, cpp)
+char *id, **cpp;
+{
+# ifdef	HAS_CGETENT
+	char *answer;
+	return((cgetstr(area, id, &answer) > 0) ? answer : 0);
+# else
+	return(0);
+# endif
+}
+#endif
diff --git a/contrib/telnet/libtelnet/kerberos.c b/contrib/telnet/libtelnet/kerberos.c
new file mode 100644
index 0000000..dbf4956
--- /dev/null
+++ b/contrib/telnet/libtelnet/kerberos.c
@@ -0,0 +1,560 @@
+/*-
+ * Copyright (c) 1991, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef lint
+static char sccsid[] = "@(#)kerberos.c	8.3 (Berkeley) 5/30/95";
+#endif /* not lint */
+
+/*
+ * Copyright (C) 1990 by the Massachusetts Institute of Technology
+ *
+ * Export of this software from the United States of America is assumed
+ * to require a specific license from the United States Government.
+ * It is the responsibility of any person or organization contemplating
+ * export to obtain such a license before exporting.
+ *
+ * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
+ * distribute this software and its documentation for any purpose and
+ * without fee is hereby granted, provided that the above copyright
+ * notice appear in all copies and that both that copyright notice and
+ * this permission notice appear in supporting documentation, and that
+ * the name of M.I.T. not be used in advertising or publicity pertaining
+ * to distribution of the software without specific, written prior
+ * permission.  M.I.T. makes no representations about the suitability of
+ * this software for any purpose.  It is provided "as is" without express
+ * or implied warranty.
+ */
+
+#ifdef	KRB4
+#include <sys/types.h>
+#include <arpa/telnet.h>
+#include <stdio.h>
+#include <des.h>	/* BSD wont include this in krb.h, so we do it here */
+#include <krb.h>
+#ifdef	__STDC__
+#include <stdlib.h>
+#endif
+#ifdef	NO_STRING_H
+#include <strings.h>
+#else
+#include <string.h>
+#endif
+
+#include "encrypt.h"
+#include "auth.h"
+#include "misc.h"
+
+int kerberos4_cksum P((unsigned char *, int));
+int krb_mk_req P((KTEXT, char *, char *, char *, u_long));
+int krb_rd_req P((KTEXT, char *, char *, u_long, AUTH_DAT *, char *));
+int krb_kntoln P((AUTH_DAT *, char *));
+int krb_get_cred P((char *, char *, char *, CREDENTIALS *));
+int krb_get_lrealm P((char *, int));
+int kuserok P((AUTH_DAT *, char *));
+
+extern auth_debug_mode;
+
+static unsigned char str_data[1024] = { IAC, SB, TELOPT_AUTHENTICATION, 0,
+			  		AUTHTYPE_KERBEROS_V4, };
+static unsigned char str_name[1024] = { IAC, SB, TELOPT_AUTHENTICATION,
+					TELQUAL_NAME, };
+
+#define	KRB_AUTH	0		/* Authentication data follows */
+#define	KRB_REJECT	1		/* Rejected (reason might follow) */
+#define	KRB_ACCEPT	2		/* Accepted */
+#define	KRB_CHALLENGE	3		/* Challenge for mutual auth. */
+#define	KRB_RESPONSE	4		/* Response for mutual auth. */
+
+#define KRB_SERVICE_NAME   "rcmd"
+
+static	KTEXT_ST auth;
+static	char name[ANAME_SZ];
+static	AUTH_DAT adat = { 0 };
+#ifdef	ENCRYPTION
+static Block	session_key	= { 0 };
+static Schedule sched;
+static Block	challenge	= { 0 };
+#endif	/* ENCRYPTION */
+
+	static int
+Data(ap, type, d, c)
+	Authenticator *ap;
+	int type;
+	void *d;
+	int c;
+{
+	unsigned char *p = str_data + 4;
+	unsigned char *cd = (unsigned char *)d;
+
+	if (c == -1)
+		c = strlen((char *)cd);
+
+	if (auth_debug_mode) {
+		printf("%s:%d: [%d] (%d)",
+			str_data[3] == TELQUAL_IS ? ">>>IS" : ">>>REPLY",
+			str_data[3],
+			type, c);
+		printd(d, c);
+		printf("\r\n");
+	}
+	*p++ = ap->type;
+	*p++ = ap->way;
+	*p++ = type;
+	while (c-- > 0) {
+		if ((*p++ = *cd++) == IAC)
+			*p++ = IAC;
+	}
+	*p++ = IAC;
+	*p++ = SE;
+	if (str_data[3] == TELQUAL_IS)
+		printsub('>', &str_data[2], p - (&str_data[2]));
+	return(net_write(str_data, p - str_data));
+}
+
+	int
+kerberos4_init(ap, server)
+	Authenticator *ap;
+	int server;
+{
+	FILE *fp;
+
+	if (server) {
+		str_data[3] = TELQUAL_REPLY;
+		if ((fp = fopen(KEYFILE, "r")) == NULL)
+			return(0);
+		fclose(fp);
+	} else {
+		str_data[3] = TELQUAL_IS;
+	}
+	return(1);
+}
+
+char dst_realm_buf[REALM_SZ], *dest_realm = NULL;
+int dst_realm_sz = REALM_SZ;
+
+	int
+kerberos4_send(ap)
+	Authenticator *ap;
+{
+	KTEXT_ST auth;
+#ifdef	ENCRYPTION
+	Block enckey;
+#endif	/* ENCRYPTION */
+	char instance[INST_SZ];
+	char *realm;
+	char *krb_realmofhost();
+	char *krb_get_phost();
+	CREDENTIALS cred;
+	int r;
+
+	printf("[ Trying KERBEROS4 ... ]\n");
+	if (!UserNameRequested) {
+		if (auth_debug_mode) {
+			printf("Kerberos V4: no user name supplied\r\n");
+		}
+		return(0);
+	}
+
+	memset(instance, 0, sizeof(instance));
+
+	if (realm = krb_get_phost(RemoteHostName))
+		strncpy(instance, realm, sizeof(instance));
+
+	instance[sizeof(instance)-1] = '\0';
+
+	realm = dest_realm ? dest_realm : krb_realmofhost(RemoteHostName);
+
+	if (!realm) {
+		printf("Kerberos V4: no realm for %s\r\n", RemoteHostName);
+		return(0);
+	}
+	if (r = krb_mk_req(&auth, KRB_SERVICE_NAME, instance, realm, 0L)) {
+		printf("mk_req failed: %s\r\n", krb_err_txt[r]);
+		return(0);
+	}
+	if (r = krb_get_cred(KRB_SERVICE_NAME, instance, realm, &cred)) {
+		printf("get_cred failed: %s\r\n", krb_err_txt[r]);
+		return(0);
+	}
+	if (!auth_sendname(UserNameRequested, strlen(UserNameRequested))) {
+		if (auth_debug_mode)
+			printf("Not enough room for user name\r\n");
+		return(0);
+	}
+	if (auth_debug_mode)
+		printf("Sent %d bytes of authentication data\r\n", auth.length);
+	if (!Data(ap, KRB_AUTH, (void *)auth.dat, auth.length)) {
+		if (auth_debug_mode)
+			printf("Not enough room for authentication data\r\n");
+		return(0);
+	}
+#ifdef	ENCRYPTION
+	/*
+	 * If we are doing mutual authentication, get set up to send
+	 * the challenge, and verify it when the response comes back.
+	 */
+	if ((ap->way & AUTH_HOW_MASK) == AUTH_HOW_MUTUAL) {
+		register int i;
+
+		des_key_sched(cred.session, sched);
+		des_init_random_number_generator(cred.session);
+		des_new_random_key(session_key);
+		des_ecb_encrypt(session_key, session_key, sched, 0);
+		des_ecb_encrypt(session_key, challenge, sched, 0);
+		/*
+		 * Increment the challenge by 1, and encrypt it for
+		 * later comparison.
+		 */
+		for (i = 7; i >= 0; --i) {
+			register int x;
+			x = (unsigned int)challenge[i] + 1;
+			challenge[i] = x;	/* ignore overflow */
+			if (x < 256)		/* if no overflow, all done */
+				break;
+		}
+		des_ecb_encrypt(challenge, challenge, sched, 1);
+	}
+#endif	/* ENCRYPTION */
+
+	if (auth_debug_mode) {
+		printf("CK: %d:", kerberos4_cksum(auth.dat, auth.length));
+		printd(auth.dat, auth.length);
+		printf("\r\n");
+		printf("Sent Kerberos V4 credentials to server\r\n");
+	}
+	return(1);
+}
+
+	void
+kerberos4_is(ap, data, cnt)
+	Authenticator *ap;
+	unsigned char *data;
+	int cnt;
+{
+#ifdef	ENCRYPTION
+	Session_Key skey;
+	Block datablock;
+#endif	/* ENCRYPTION */
+	char realm[REALM_SZ];
+	char instance[INST_SZ];
+	int r;
+
+	if (cnt-- < 1)
+		return;
+	switch (*data++) {
+	case KRB_AUTH:
+		if (krb_get_lrealm(realm, 1) != KSUCCESS) {
+			Data(ap, KRB_REJECT, (void *)"No local V4 Realm.", -1);
+			auth_finished(ap, AUTH_REJECT);
+			if (auth_debug_mode)
+				printf("No local realm\r\n");
+			return;
+		}
+		memmove((void *)auth.dat, (void *)data, auth.length = cnt);
+		if (auth_debug_mode) {
+			printf("Got %d bytes of authentication data\r\n", cnt);
+			printf("CK: %d:", kerberos4_cksum(auth.dat, auth.length));
+			printd(auth.dat, auth.length);
+			printf("\r\n");
+		}
+		instance[0] = '*'; instance[1] = 0;
+		if (r = krb_rd_req(&auth, KRB_SERVICE_NAME,
+				   instance, 0, &adat, "")) {
+			if (auth_debug_mode)
+				printf("Kerberos failed him as %s\r\n", name);
+			Data(ap, KRB_REJECT, (void *)krb_err_txt[r], -1);
+			auth_finished(ap, AUTH_REJECT);
+			return;
+		}
+#ifdef	ENCRYPTION
+		memmove((void *)session_key, (void *)adat.session, sizeof(Block));
+#endif	/* ENCRYPTION */
+		krb_kntoln(&adat, name);
+
+		if (UserNameRequested && !kuserok(&adat, UserNameRequested))
+			Data(ap, KRB_ACCEPT, (void *)0, 0);
+		else
+			Data(ap, KRB_REJECT,
+				(void *)"user is not authorized", -1);
+		auth_finished(ap, AUTH_USER);
+		break;
+
+	case KRB_CHALLENGE:
+#ifndef	ENCRYPTION
+		Data(ap, KRB_RESPONSE, (void *)0, 0);
+#else	/* ENCRYPTION */
+		if (!VALIDKEY(session_key)) {
+			/*
+			 * We don't have a valid session key, so just
+			 * send back a response with an empty session
+			 * key.
+			 */
+			Data(ap, KRB_RESPONSE, (void *)0, 0);
+			break;
+		}
+
+		/*
+		 * Initialize the random number generator since it's
+		 * used later on by the encryption routine.
+		 */
+		des_init_random_number_generator(session_key);
+		des_key_sched(session_key, sched);
+		memmove((void *)datablock, (void *)data, sizeof(Block));
+		/*
+		 * Take the received encrypted challenge, and encrypt
+		 * it again to get a unique session_key for the
+		 * ENCRYPT option.
+		 */
+		des_ecb_encrypt(datablock, session_key, sched, 1);
+		skey.type = SK_DES;
+		skey.length = 8;
+		skey.data = session_key;
+		encrypt_session_key(&skey, 1);
+		/*
+		 * Now decrypt the received encrypted challenge,
+		 * increment by one, re-encrypt it and send it back.
+		 */
+		des_ecb_encrypt(datablock, challenge, sched, 0);
+		for (r = 7; r >= 0; r--) {
+			register int t;
+			t = (unsigned int)challenge[r] + 1;
+			challenge[r] = t;	/* ignore overflow */
+			if (t < 256)		/* if no overflow, all done */
+				break;
+		}
+		des_ecb_encrypt(challenge, challenge, sched, 1);
+		Data(ap, KRB_RESPONSE, (void *)challenge, sizeof(challenge));
+#endif	/* ENCRYPTION */
+		break;
+
+	default:
+		if (auth_debug_mode)
+			printf("Unknown Kerberos option %d\r\n", data[-1]);
+		Data(ap, KRB_REJECT, 0, 0);
+		break;
+	}
+}
+
+	void
+kerberos4_reply(ap, data, cnt)
+	Authenticator *ap;
+	unsigned char *data;
+	int cnt;
+{
+#ifdef	ENCRYPTION
+	Session_Key skey;
+#endif	/* ENCRYPTION */
+
+	if (cnt-- < 1)
+		return;
+	switch (*data++) {
+	case KRB_REJECT:
+		if (cnt > 0) {
+			printf("[ Kerberos V4 refuses authentication because %.*s ]\r\n",
+				cnt, data);
+		} else
+			printf("[ Kerberos V4 refuses authentication ]\r\n");
+		auth_send_retry();
+		return;
+	case KRB_ACCEPT:
+		printf("[ Kerberos V4 accepts you ]\n");
+		if ((ap->way & AUTH_HOW_MASK) == AUTH_HOW_MUTUAL) {
+			/*
+			 * Send over the encrypted challenge.
+		 	 */
+#ifndef	ENCRYPTION
+			Data(ap, KRB_CHALLENGE, (void *)0, 0);
+#else	/* ENCRYPTION */
+			Data(ap, KRB_CHALLENGE, (void *)session_key,
+						sizeof(session_key));
+			des_ecb_encrypt(session_key, session_key, sched, 1);
+			skey.type = SK_DES;
+			skey.length = 8;
+			skey.data = session_key;
+			encrypt_session_key(&skey, 0);
+#endif	/* ENCRYPTION */
+			return;
+		}
+		auth_finished(ap, AUTH_USER);
+		return;
+	case KRB_RESPONSE:
+#ifdef	ENCRYPTION
+		/*
+		 * Verify that the response to the challenge is correct.
+		 */
+		if ((cnt != sizeof(Block)) ||
+		    (0 != memcmp((void *)data, (void *)challenge,
+						sizeof(challenge))))
+		{
+#endif	/* ENCRYPTION */
+			printf("[ Kerberos V4 challenge failed!!! ]\r\n");
+			auth_send_retry();
+			return;
+#ifdef	ENCRYPTION
+		}
+		printf("[ Kerberos V4 challenge successful ]\r\n");
+		auth_finished(ap, AUTH_USER);
+#endif	/* ENCRYPTION */
+		break;
+	default:
+		if (auth_debug_mode)
+			printf("Unknown Kerberos option %d\r\n", data[-1]);
+		return;
+	}
+}
+
+	int
+kerberos4_status(ap, name, level)
+	Authenticator *ap;
+	char *name;
+	int level;
+{
+	if (level < AUTH_USER)
+		return(level);
+
+	if (UserNameRequested && !kuserok(&adat, UserNameRequested)) {
+		strcpy(name, UserNameRequested);
+		return(AUTH_VALID);
+	} else
+		return(AUTH_USER);
+}
+
+#define	BUMP(buf, len)		while (*(buf)) {++(buf), --(len);}
+#define	ADDC(buf, len, c)	if ((len) > 0) {*(buf)++ = (c); --(len);}
+
+	void
+kerberos4_printsub(data, cnt, buf, buflen)
+	unsigned char *data, *buf;
+	int cnt, buflen;
+{
+	char lbuf[32];
+	register int i;
+
+	buf[buflen-1] = '\0';		/* make sure its NULL terminated */
+	buflen -= 1;
+
+	switch(data[3]) {
+	case KRB_REJECT:		/* Rejected (reason might follow) */
+		strncpy((char *)buf, " REJECT ", buflen);
+		goto common;
+
+	case KRB_ACCEPT:		/* Accepted (name might follow) */
+		strncpy((char *)buf, " ACCEPT ", buflen);
+	common:
+		BUMP(buf, buflen);
+		if (cnt <= 4)
+			break;
+		ADDC(buf, buflen, '"');
+		for (i = 4; i < cnt; i++)
+			ADDC(buf, buflen, data[i]);
+		ADDC(buf, buflen, '"');
+		ADDC(buf, buflen, '\0');
+		break;
+
+	case KRB_AUTH:			/* Authentication data follows */
+		strncpy((char *)buf, " AUTH", buflen);
+		goto common2;
+
+	case KRB_CHALLENGE:
+		strncpy((char *)buf, " CHALLENGE", buflen);
+		goto common2;
+
+	case KRB_RESPONSE:
+		strncpy((char *)buf, " RESPONSE", buflen);
+		goto common2;
+
+	default:
+		sprintf(lbuf, " %d (unknown)", data[3]);
+		strncpy((char *)buf, lbuf, buflen);
+	common2:
+		BUMP(buf, buflen);
+		for (i = 4; i < cnt; i++) {
+			sprintf(lbuf, " %d", data[i]);
+			strncpy((char *)buf, lbuf, buflen);
+			BUMP(buf, buflen);
+		}
+		break;
+	}
+}
+
+	int
+kerberos4_cksum(d, n)
+	unsigned char *d;
+	int n;
+{
+	int ck = 0;
+
+	/*
+	 * A comment is probably needed here for those not
+	 * well versed in the "C" language.  Yes, this is
+	 * supposed to be a "switch" with the body of the
+	 * "switch" being a "while" statement.  The whole
+	 * purpose of the switch is to allow us to jump into
+	 * the middle of the while() loop, and then not have
+	 * to do any more switch()s.
+	 *
+	 * Some compilers will spit out a warning message
+	 * about the loop not being entered at the top.
+	 */
+	switch (n&03)
+	while (n > 0) {
+	case 0:
+		ck ^= (int)*d++ << 24;
+		--n;
+	case 3:
+		ck ^= (int)*d++ << 16;
+		--n;
+	case 2:
+		ck ^= (int)*d++ << 8;
+		--n;
+	case 1:
+		ck ^= (int)*d++;
+		--n;
+	}
+	return(ck);
+}
+#endif
+
+#ifdef notdef
+
+prkey(msg, key)
+	char *msg;
+	unsigned char *key;
+{
+	register int i;
+	printf("%s:", msg);
+	for (i = 0; i < 8; i++)
+		printf(" %3d", key[i]);
+	printf("\r\n");
+}
+#endif
diff --git a/contrib/telnet/libtelnet/kerberos5.c b/contrib/telnet/libtelnet/kerberos5.c
new file mode 100644
index 0000000..bcf1a9f
--- /dev/null
+++ b/contrib/telnet/libtelnet/kerberos5.c
@@ -0,0 +1,764 @@
+/*
+ *	$Source: /mit/krb5/.cvsroot/src/appl/telnet/libtelnet/kerberos5.c,v $
+ *	$Author: tytso $
+ *	$Id: kerberos5.c,v 1.1 1997/09/04 06:11:15 markm Exp $
+ */
+
+#if !defined(lint) && !defined(SABER)
+static
+#ifdef __STDC__
+const
+#endif
+char rcsid_kerberos5_c[] = "$Id: kerberos5.c,v 1.1 1997/09/04 06:11:15 markm Exp $";
+#endif /* lint */
+
+/*-
+ * Copyright (c) 1991, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef lint
+static char sccsid[] = "@(#)kerberos5.c	8.3 (Berkeley) 5/30/95";
+#endif /* not lint */
+
+/*
+ * Copyright (C) 1990 by the Massachusetts Institute of Technology
+ *
+ * Export of this software from the United States of America may
+ * require a specific license from the United States Government.
+ * It is the responsibility of any person or organization contemplating
+ * export to obtain such a license before exporting.
+ *
+ * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
+ * distribute this software and its documentation for any purpose and
+ * without fee is hereby granted, provided that the above copyright
+ * notice appear in all copies and that both that copyright notice and
+ * this permission notice appear in supporting documentation, and that
+ * the name of M.I.T. not be used in advertising or publicity pertaining
+ * to distribution of the software without specific, written prior
+ * permission.  M.I.T. makes no representations about the suitability of
+ * this software for any purpose.  It is provided "as is" without express
+ * or implied warranty.
+ */
+
+
+#ifdef	KRB5
+#include <arpa/telnet.h>
+#include <stdio.h>
+#include <krb5/krb5.h>
+#include <krb5/asn1.h>
+#include <krb5/crc-32.h>
+#include <krb5/los-proto.h>
+#include <krb5/ext-proto.h>
+#include <com_err.h>
+#include <netdb.h>
+#include <ctype.h>
+
+/* kerberos 5 include files (ext-proto.h) will get an appropriate stdlib.h
+   and string.h/strings.h */
+
+#include "encrypt.h"
+#include "auth.h"
+#include "misc.h"
+
+extern auth_debug_mode;
+
+#ifdef	FORWARD
+int forward_flags = 0;  /* Flags get set in telnet/main.c on -f and -F */
+
+/* These values need to be the same as those defined in telnet/main.c. */
+/* Either define them in both places, or put in some common header file. */
+#define OPTS_FORWARD_CREDS	0x00000002
+#define OPTS_FORWARDABLE_CREDS	0x00000001
+
+void kerberos5_forward();
+
+#endif	/* FORWARD */
+
+static unsigned char str_data[1024] = { IAC, SB, TELOPT_AUTHENTICATION, 0,
+			  		AUTHTYPE_KERBEROS_V5, };
+/*static unsigned char str_name[1024] = { IAC, SB, TELOPT_AUTHENTICATION,
+					TELQUAL_NAME, };*/
+
+#define	KRB_AUTH		0	/* Authentication data follows */
+#define	KRB_REJECT		1	/* Rejected (reason might follow) */
+#define	KRB_ACCEPT		2	/* Accepted */
+#define	KRB_RESPONSE		3	/* Response for mutual auth. */
+
+#ifdef	FORWARD
+#define KRB_FORWARD     	4       /* Forwarded credentials follow */
+#define KRB_FORWARD_ACCEPT     	5       /* Forwarded credentials accepted */
+#define KRB_FORWARD_REJECT     	6       /* Forwarded credentials rejected */
+#endif	/* FORWARD */
+
+static	krb5_data auth;
+	/* telnetd gets session key from here */
+static	krb5_tkt_authent *authdat = NULL;
+/* telnet matches the AP_REQ and AP_REP with this */
+static	krb5_authenticator authenticator;
+
+/* some compilers can't hack void *, so we use the Kerberos krb5_pointer,
+   which is either void * or char *, depending on the compiler. */
+
+#define Voidptr krb5_pointer
+
+Block	session_key;
+
+	static int
+Data(ap, type, d, c)
+	Authenticator *ap;
+	int type;
+	Voidptr d;
+	int c;
+{
+	unsigned char *p = str_data + 4;
+	unsigned char *cd = (unsigned char *)d;
+
+	if (c == -1)
+		c = strlen((char *)cd);
+
+	if (auth_debug_mode) {
+		printf("%s:%d: [%d] (%d)",
+			str_data[3] == TELQUAL_IS ? ">>>IS" : ">>>REPLY",
+			str_data[3],
+			type, c);
+		printd(d, c);
+		printf("\r\n");
+	}
+	*p++ = ap->type;
+	*p++ = ap->way;
+	*p++ = type;
+	while (c-- > 0) {
+		if ((*p++ = *cd++) == IAC)
+			*p++ = IAC;
+	}
+	*p++ = IAC;
+	*p++ = SE;
+	if (str_data[3] == TELQUAL_IS)
+		printsub('>', &str_data[2], p - &str_data[2]);
+	return(net_write(str_data, p - str_data));
+}
+
+	int
+kerberos5_init(ap, server)
+	Authenticator *ap;
+	int server;
+{
+	if (server)
+		str_data[3] = TELQUAL_REPLY;
+	else
+		str_data[3] = TELQUAL_IS;
+	krb5_init_ets();
+	return(1);
+}
+
+	int
+kerberos5_send(ap)
+	Authenticator *ap;
+{
+	char **realms;
+	char *name;
+	char *p1, *p2;
+	krb5_checksum ksum;
+	krb5_octet sum[CRC32_CKSUM_LENGTH];
+ 	krb5_principal server;
+	krb5_error_code r;
+	krb5_ccache ccache;
+	krb5_creds creds;		/* telnet gets session key from here */
+	extern krb5_flags krb5_kdc_default_options;
+	int ap_opts;
+
+#ifdef	ENCRYPTION
+	krb5_keyblock *newkey = 0;
+#endif	/* ENCRYPTION */
+
+	ksum.checksum_type = CKSUMTYPE_CRC32;
+	ksum.contents = sum;
+	ksum.length = sizeof(sum);
+	memset((Voidptr )sum, 0, sizeof(sum));
+
+	if (!UserNameRequested) {
+		if (auth_debug_mode) {
+			printf("Kerberos V5: no user name supplied\r\n");
+		}
+		return(0);
+	}
+
+	if (r = krb5_cc_default(&ccache)) {
+		if (auth_debug_mode) {
+			printf("Kerberos V5: could not get default ccache\r\n");
+		}
+		return(0);
+	}
+
+	if ((name = malloc(strlen(RemoteHostName)+1)) == NULL) {
+		if (auth_debug_mode)
+			printf("Out of memory for hostname in Kerberos V5\r\n");
+		return(0);
+	}
+
+	if (r = krb5_get_host_realm(RemoteHostName, &realms)) {
+		if (auth_debug_mode)
+			printf("Kerberos V5: no realm for %s\r\n", RemoteHostName);
+		free(name);
+		return(0);
+	}
+
+	p1 = RemoteHostName;
+	p2 = name;
+
+	while (*p2 = *p1++) {
+		if (isupper(*p2))
+			*p2 |= 040;
+		++p2;
+	}
+
+	if (r = krb5_build_principal_ext(&server,
+					 strlen(realms[0]), realms[0],
+					 4, "host",
+					 p2 - name, name,
+					 0)) {
+		if (auth_debug_mode) {
+			printf("Kerberos V5: failure setting up principal (%s)\r\n",
+			       error_message(r));
+		}
+		free(name);
+		krb5_free_host_realm(realms);
+		return(0);
+	}
+
+
+	memset((char *)&creds, 0, sizeof(creds));
+	creds.server = server;
+
+	if (r = krb5_cc_get_principal(ccache, &creds.client)) {
+		if (auth_debug_mode) {
+			printf("Kerberos V5: failure on principal (%s)\r\n",
+				error_message(r));
+		}
+		free(name);
+		krb5_free_principal(server);
+		krb5_free_host_realm(realms);
+		return(0);
+	}
+
+	if (r = krb5_get_credentials(krb5_kdc_default_options, ccache, &creds)) {
+		if (auth_debug_mode) {
+			printf("Kerberos V5: failure on credentials(%d)\r\n",r);
+		}
+		free(name);
+		krb5_free_host_realm(realms);
+		krb5_free_principal(server);
+		return(0);
+	}
+
+	if ((ap->way & AUTH_HOW_MASK) == AUTH_HOW_MUTUAL)
+	    ap_opts = AP_OPTS_MUTUAL_REQUIRED;
+	else
+	    ap_opts = 0;
+
+	r = krb5_mk_req_extended(ap_opts, &ksum, krb5_kdc_default_options, 0,
+#ifdef	ENCRYPTION
+				 &newkey,
+#else	/* ENCRYPTION */
+				 0,
+#endif	/* ENCRYPTION */
+				 ccache, &creds, &authenticator, &auth);
+	/* don't let the key get freed if we clean up the authenticator */
+	authenticator.subkey = 0;
+
+	free(name);
+	krb5_free_host_realm(realms);
+	krb5_free_principal(server);
+#ifdef	ENCRYPTION
+	if (newkey) {
+	    /* keep the key in our private storage, but don't use it
+	       yet---see kerberos5_reply() below */
+	    if (newkey->keytype != KEYTYPE_DES) {
+		if (creds.keyblock.keytype == KEYTYPE_DES)
+		    /* use the session key in credentials instead */
+		    memmove((char *)session_key,
+			   (char *)creds.keyblock.contents, sizeof(Block));
+		else
+		    /* XXX ? */;
+	    } else {
+		memmove((char *)session_key, (char *)newkey->contents,
+		       sizeof(Block));
+	    }
+	    krb5_free_keyblock(newkey);
+	}
+#endif	/* ENCRYPTION */
+	if (r) {
+		if (auth_debug_mode) {
+			printf("Kerberos V5: mk_req failed (%s)\r\n",
+			       error_message(r));
+		}
+		return(0);
+	}
+
+	if (!auth_sendname(UserNameRequested, strlen(UserNameRequested))) {
+		if (auth_debug_mode)
+			printf("Not enough room for user name\r\n");
+		return(0);
+	}
+	if (!Data(ap, KRB_AUTH, auth.data, auth.length)) {
+		if (auth_debug_mode)
+			printf("Not enough room for authentication data\r\n");
+		return(0);
+	}
+	if (auth_debug_mode) {
+		printf("Sent Kerberos V5 credentials to server\r\n");
+	}
+	return(1);
+}
+
+	void
+kerberos5_is(ap, data, cnt)
+	Authenticator *ap;
+	unsigned char *data;
+	int cnt;
+{
+	int r;
+	struct hostent *hp;
+	char *p1, *p2;
+	static char *realm = NULL;
+	krb5_principal server;
+	krb5_ap_rep_enc_part reply;
+	krb5_data outbuf;
+#ifdef ENCRYPTION
+	Session_Key skey;
+#endif	/* ENCRYPTION */
+	char *name;
+	char *getenv();
+	krb5_data inbuf;
+
+	if (cnt-- < 1)
+		return;
+	switch (*data++) {
+	case KRB_AUTH:
+		auth.data = (char *)data;
+		auth.length = cnt;
+
+		if (!(hp = gethostbyname(LocalHostName))) {
+			if (auth_debug_mode)
+				printf("Cannot resolve local host name\r\n");
+			Data(ap, KRB_REJECT, "Unknown local hostname.", -1);
+			auth_finished(ap, AUTH_REJECT);
+			return;
+		}
+
+		if (!realm && (krb5_get_default_realm(&realm))) {
+			if (auth_debug_mode)
+				printf("Could not get default realm\r\n");
+			Data(ap, KRB_REJECT, "Could not get default realm.", -1);
+			auth_finished(ap, AUTH_REJECT);
+			return;
+		}
+
+		if ((name = malloc(strlen(hp->h_name)+1)) == NULL) {
+			if (auth_debug_mode)
+				printf("Out of memory for hostname in Kerberos V5\r\n");
+			Data(ap, KRB_REJECT, "Out of memory.", -1);
+			auth_finished(ap, AUTH_REJECT);
+			return;
+		}
+
+		p1 = hp->h_name;
+		p2 = name;
+
+		while (*p2 = *p1++) {
+			if (isupper(*p2))
+				*p2 |= 040;
+			++p2;
+		}
+
+		if (authdat)
+			krb5_free_tkt_authent(authdat);
+
+		r = krb5_build_principal_ext(&server,
+					     strlen(realm), realm,
+					     4, "host",
+					     p2 - name, name,
+					     0);
+		if (!r) {
+		    r = krb5_rd_req_simple(&auth, server, 0, &authdat);
+		    krb5_free_principal(server);
+		}
+		if (r) {
+			char errbuf[128];
+
+		    errout:
+			authdat = 0;
+			(void) strcpy(errbuf, "Read req failed: ");
+			(void) strcat(errbuf, error_message(r));
+			Data(ap, KRB_REJECT, errbuf, -1);
+			if (auth_debug_mode)
+				printf("%s\r\n", errbuf);
+			return;
+		}
+		free(name);
+		if ((ap->way & AUTH_HOW_MASK) == AUTH_HOW_MUTUAL) {
+		    /* do ap_rep stuff here */
+		    reply.ctime = authdat->authenticator->ctime;
+		    reply.cusec = authdat->authenticator->cusec;
+		    reply.subkey = 0;	/* use the one he gave us, so don't
+					   need to return one here */
+		    reply.seq_number = 0; /* we don't do seq #'s. */
+
+		    if (r = krb5_mk_rep(&reply,
+					authdat->authenticator->subkey ?
+					authdat->authenticator->subkey :
+					authdat->ticket->enc_part2->session,
+					&outbuf)) {
+			goto errout;
+		    }
+		    Data(ap, KRB_RESPONSE, outbuf.data, outbuf.length);
+		}
+		if (krb5_unparse_name(authdat->ticket->enc_part2 ->client,
+				      					&name))
+			name = 0;
+		Data(ap, KRB_ACCEPT, name, name ? -1 : 0);
+		if (auth_debug_mode) {
+			printf("Kerberos5 identifies him as ``%s''\r\n",
+							name ? name : "");
+		}
+		auth_finished(ap, AUTH_USER);
+
+		free(name);
+	    	if (authdat->authenticator->subkey &&
+		    authdat->authenticator->subkey->keytype == KEYTYPE_DES) {
+		    memmove((Voidptr )session_key,
+			   (Voidptr )authdat->authenticator->subkey->contents,
+			   sizeof(Block));
+		} else if (authdat->ticket->enc_part2->session->keytype ==
+			   KEYTYPE_DES) {
+		    memmove((Voidptr )session_key,
+			(Voidptr )authdat->ticket->enc_part2->session->contents,
+			sizeof(Block));
+		} else
+		    break;
+
+#ifdef ENCRYPTION
+		skey.type = SK_DES;
+		skey.length = 8;
+		skey.data = session_key;
+		encrypt_session_key(&skey, 1);
+#endif	/* ENCRYPTION */
+		break;
+#ifdef	FORWARD
+	case KRB_FORWARD:
+		inbuf.data = (char *)data;
+		inbuf.length = cnt;
+		if (r = rd_and_store_for_creds(&inbuf, authdat->ticket,
+					       UserNameRequested)) {
+		    char errbuf[128];
+
+		    (void) strcpy(errbuf, "Read forwarded creds failed: ");
+		    (void) strcat(errbuf, error_message(r));
+		    Data(ap, KRB_FORWARD_REJECT, errbuf, -1);
+		    if (auth_debug_mode)
+		      printf("Could not read forwarded credentials\r\n");
+		}
+		else
+		  Data(ap, KRB_FORWARD_ACCEPT, 0, 0);
+		  if (auth_debug_mode)
+		    printf("Forwarded credentials obtained\r\n");
+		break;
+#endif	/* FORWARD */
+	default:
+		if (auth_debug_mode)
+			printf("Unknown Kerberos option %d\r\n", data[-1]);
+		Data(ap, KRB_REJECT, 0, 0);
+		break;
+	}
+}
+
+	void
+kerberos5_reply(ap, data, cnt)
+	Authenticator *ap;
+	unsigned char *data;
+	int cnt;
+{
+	Session_Key skey;
+	static int mutual_complete = 0;
+
+	if (cnt-- < 1)
+		return;
+	switch (*data++) {
+	case KRB_REJECT:
+		if (cnt > 0) {
+			printf("[ Kerberos V5 refuses authentication because %.*s ]\r\n",
+				cnt, data);
+		} else
+			printf("[ Kerberos V5 refuses authentication ]\r\n");
+		auth_send_retry();
+		return;
+	case KRB_ACCEPT:
+		if ((ap->way & AUTH_HOW_MASK) == AUTH_HOW_MUTUAL &&
+		    !mutual_complete) {
+		    printf("[ Kerberos V5 accepted you, but didn't provide mutual authentication! ]\n");
+		    auth_send_retry();
+		    return;
+		}
+		if (cnt)
+		    printf("[ Kerberos V5 accepts you as ``%.*s'' ]\n", cnt, data);
+		else
+		    printf("[ Kerberos V5 accepts you ]\n");
+		auth_finished(ap, AUTH_USER);
+#ifdef	FORWARD
+		if (forward_flags & OPTS_FORWARD_CREDS)
+		  kerberos5_forward(ap);
+#endif	/* FORWARD */
+		break;
+	case KRB_RESPONSE:
+		if ((ap->way & AUTH_HOW_MASK) == AUTH_HOW_MUTUAL) {
+		    /* the rest of the reply should contain a krb_ap_rep */
+		    krb5_ap_rep_enc_part *reply;
+		    krb5_data inbuf;
+		    krb5_error_code r;
+		    krb5_keyblock tmpkey;
+
+		    inbuf.length = cnt;
+		    inbuf.data = (char *)data;
+
+		    tmpkey.keytype = KEYTYPE_DES;
+		    tmpkey.contents = session_key;
+		    tmpkey.length = sizeof(Block);
+
+		    if (r = krb5_rd_rep(&inbuf, &tmpkey, &reply)) {
+			printf("[ Mutual authentication failed: %s ]\n",
+			       error_message(r));
+			auth_send_retry();
+			return;
+		    }
+		    if (reply->ctime != authenticator.ctime ||
+			reply->cusec != authenticator.cusec) {
+			printf("[ Mutual authentication failed (mismatched KRB_AP_REP) ]\n");
+			auth_send_retry();
+			return;
+		    }
+		    krb5_free_ap_rep_enc_part(reply);
+#ifdef	ENCRYPTION
+			skey.type = SK_DES;
+			skey.length = 8;
+			skey.data = session_key;
+			encrypt_session_key(&skey, 0);
+#endif	/* ENCRYPTION */
+		    mutual_complete = 1;
+		}
+		return;
+#ifdef	FORWARD
+	case KRB_FORWARD_ACCEPT:
+		printf("[ Kerberos V5 accepted forwarded credentials ]\n");
+		return;
+	case KRB_FORWARD_REJECT:
+		printf("[ Kerberos V5 refuses forwarded credentials because %.*s ]\r\n",
+				cnt, data);
+		return;
+#endif	/* FORWARD */
+	default:
+		if (auth_debug_mode)
+			printf("Unknown Kerberos option %d\r\n", data[-1]);
+		return;
+	}
+}
+
+	int
+kerberos5_status(ap, name, level)
+	Authenticator *ap;
+	char *name;
+	int level;
+{
+	if (level < AUTH_USER)
+		return(level);
+
+	if (UserNameRequested &&
+	    krb5_kuserok(authdat->ticket->enc_part2->client, UserNameRequested))
+	{
+		strcpy(name, UserNameRequested);
+		return(AUTH_VALID);
+	} else
+		return(AUTH_USER);
+}
+
+#define	BUMP(buf, len)		while (*(buf)) {++(buf), --(len);}
+#define	ADDC(buf, len, c)	if ((len) > 0) {*(buf)++ = (c); --(len);}
+
+	void
+kerberos5_printsub(data, cnt, buf, buflen)
+	unsigned char *data, *buf;
+	int cnt, buflen;
+{
+	char lbuf[32];
+	register int i;
+
+	buf[buflen-1] = '\0';		/* make sure its NULL terminated */
+	buflen -= 1;
+
+	switch(data[3]) {
+	case KRB_REJECT:		/* Rejected (reason might follow) */
+		strncpy((char *)buf, " REJECT ", buflen);
+		goto common;
+
+	case KRB_ACCEPT:		/* Accepted (name might follow) */
+		strncpy((char *)buf, " ACCEPT ", buflen);
+	common:
+		BUMP(buf, buflen);
+		if (cnt <= 4)
+			break;
+		ADDC(buf, buflen, '"');
+		for (i = 4; i < cnt; i++)
+			ADDC(buf, buflen, data[i]);
+		ADDC(buf, buflen, '"');
+		ADDC(buf, buflen, '\0');
+		break;
+
+
+	case KRB_AUTH:			/* Authentication data follows */
+		strncpy((char *)buf, " AUTH", buflen);
+		goto common2;
+
+	case KRB_RESPONSE:
+		strncpy((char *)buf, " RESPONSE", buflen);
+		goto common2;
+
+#ifdef	FORWARD
+	case KRB_FORWARD:		/* Forwarded credentials follow */
+		strncpy((char *)buf, " FORWARD", buflen);
+		goto common2;
+
+	case KRB_FORWARD_ACCEPT:	/* Forwarded credentials accepted */
+		strncpy((char *)buf, " FORWARD_ACCEPT", buflen);
+		goto common2;
+
+	case KRB_FORWARD_REJECT:	/* Forwarded credentials rejected */
+					       /* (reason might follow) */
+		strncpy((char *)buf, " FORWARD_REJECT", buflen);
+		goto common2;
+#endif	/* FORWARD */
+
+	default:
+		sprintf(lbuf, " %d (unknown)", data[3]);
+		strncpy((char *)buf, lbuf, buflen);
+	common2:
+		BUMP(buf, buflen);
+		for (i = 4; i < cnt; i++) {
+			sprintf(lbuf, " %d", data[i]);
+			strncpy((char *)buf, lbuf, buflen);
+			BUMP(buf, buflen);
+		}
+		break;
+	}
+}
+
+#ifdef	FORWARD
+	void
+kerberos5_forward(ap)
+     Authenticator *ap;
+{
+    struct hostent *hp;
+    krb5_creds *local_creds;
+    krb5_error_code r;
+    krb5_data forw_creds;
+    extern krb5_cksumtype krb5_kdc_req_sumtype;
+    krb5_ccache ccache;
+    int i;
+
+    if (!(local_creds = (krb5_creds *)
+	  calloc(1, sizeof(*local_creds)))) {
+	if (auth_debug_mode)
+	  printf("Kerberos V5: could not allocate memory for credentials\r\n");
+	return;
+    }
+
+    if (r = krb5_sname_to_principal(RemoteHostName, "host", 1,
+				    &local_creds->server)) {
+	if (auth_debug_mode)
+	  printf("Kerberos V5: could not build server name - %s\r\n",
+		 error_message(r));
+	krb5_free_creds(local_creds);
+	return;
+    }
+
+    if (r = krb5_cc_default(&ccache)) {
+	if (auth_debug_mode)
+	  printf("Kerberos V5: could not get default ccache - %s\r\n",
+		 error_message(r));
+	krb5_free_creds(local_creds);
+	return;
+    }
+
+    if (r = krb5_cc_get_principal(ccache, &local_creds->client)) {
+	if (auth_debug_mode)
+	  printf("Kerberos V5: could not get default principal - %s\r\n",
+		 error_message(r));
+	krb5_free_creds(local_creds);
+	return;
+    }
+
+    /* Get ticket from credentials cache */
+    if (r = krb5_get_credentials(KRB5_GC_CACHED, ccache, local_creds)) {
+	if (auth_debug_mode)
+	  printf("Kerberos V5: could not obtain credentials - %s\r\n",
+		 error_message(r));
+	krb5_free_creds(local_creds);
+	return;
+    }
+
+    if (r = get_for_creds(ETYPE_DES_CBC_CRC,
+			  krb5_kdc_req_sumtype,
+			  RemoteHostName,
+			  local_creds->client,
+			  &local_creds->keyblock,
+			  forward_flags & OPTS_FORWARDABLE_CREDS,
+			  &forw_creds)) {
+	if (auth_debug_mode)
+	  printf("Kerberos V5: error getting forwarded creds - %s\r\n",
+		 error_message(r));
+	krb5_free_creds(local_creds);
+	return;
+    }
+
+    /* Send forwarded credentials */
+    if (!Data(ap, KRB_FORWARD, forw_creds.data, forw_creds.length)) {
+	if (auth_debug_mode)
+	  printf("Not enough room for authentication data\r\n");
+    }
+    else {
+	if (auth_debug_mode)
+	  printf("Forwarded local Kerberos V5 credentials to server\r\n");
+    }
+
+    krb5_free_creds(local_creds);
+}
+#endif	/* FORWARD */
+
+#endif /* KRB5 */
diff --git a/contrib/telnet/libtelnet/key-proto.h b/contrib/telnet/libtelnet/key-proto.h
new file mode 100644
index 0000000..9668a77
--- /dev/null
+++ b/contrib/telnet/libtelnet/key-proto.h
@@ -0,0 +1,71 @@
+/*-
+ * Copyright (c) 1991, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *	@(#)key-proto.h	8.1 (Berkeley) 6/4/93
+ */
+
+/*
+ * Copyright (C) 1990 by the Massachusetts Institute of Technology
+ *
+ * Export of this software from the United States of America is assumed
+ * to require a specific license from the United States Government.
+ * It is the responsibility of any person or organization contemplating
+ * export to obtain such a license before exporting.
+ *
+ * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
+ * distribute this software and its documentation for any purpose and
+ * without fee is hereby granted, provided that the above copyright
+ * notice appear in all copies and that both that copyright notice and
+ * this permission notice appear in supporting documentation, and that
+ * the name of M.I.T. not be used in advertising or publicity pertaining
+ * to distribution of the software without specific, written prior
+ * permission.  M.I.T. makes no representations about the suitability of
+ * this software for any purpose.  It is provided "as is" without express
+ * or implied warranty.
+ */
+
+#ifndef	__KEY_PROTO__
+#define	__KEY_PROTO__
+
+#if	!defined(P)
+#ifdef	__STDC__
+#define	P(x)	x
+#else
+#define	P(x)	()
+#endif
+#endif
+
+int key_file_exists P((void));
+void key_lookup P((unsigned char *, Block));
+void key_stream_init P((Block, Block, int));
+unsigned char key_stream P((int, int));
+#endif
diff --git a/contrib/telnet/libtelnet/krb4encpwd.c b/contrib/telnet/libtelnet/krb4encpwd.c
new file mode 100644
index 0000000..6148190
--- /dev/null
+++ b/contrib/telnet/libtelnet/krb4encpwd.c
@@ -0,0 +1,446 @@
+/*-
+ * Copyright (c) 1992, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef lint
+static char sccsid[] = "@(#)krb4encpwd.c	8.3 (Berkeley) 5/30/95";
+#endif /* not lint */
+
+
+#ifdef	KRB4_ENCPWD
+/*
+ * COPYRIGHT (C) 1990 DIGITAL EQUIPMENT CORPORATION
+ * ALL RIGHTS RESERVED
+ *
+ * "Digital Equipment Corporation authorizes the reproduction,
+ * distribution and modification of this software subject to the following
+ * restrictions:
+ *
+ * 1.  Any partial or whole copy of this software, or any modification
+ * thereof, must include this copyright notice in its entirety.
+ *
+ * 2.  This software is supplied "as is" with no warranty of any kind,
+ * expressed or implied, for any purpose, including any warranty of fitness
+ * or merchantibility.  DIGITAL assumes no responsibility for the use or
+ * reliability of this software, nor promises to provide any form of
+ * support for it on any basis.
+ *
+ * 3.  Distribution of this software is authorized only if no profit or
+ * remuneration of any kind is received in exchange for such distribution.
+ *
+ * 4.  This software produces public key authentication certificates
+ * bearing an expiration date established by DIGITAL and RSA Data
+ * Security, Inc.  It may cease to generate certificates after the expiration
+ * date.  Any modification of this software that changes or defeats
+ * the expiration date or its effect is unauthorized.
+ *
+ * 5.  Software that will renew or extend the expiration date of
+ * authentication certificates produced by this software may be obtained
+ * from RSA Data Security, Inc., 10 Twin Dolphin Drive, Redwood City, CA
+ * 94065, (415)595-8782, or from DIGITAL"
+ *
+ */
+
+#include <sys/types.h>
+#include <arpa/telnet.h>
+#include <pwd.h>
+#include <stdio.h>
+
+#include <des.h>
+#include <krb.h>
+#ifdef	__STDC__
+#include <stdlib.h>
+#endif
+#ifdef	NO_STRING_H
+#include <strings.h>
+#else
+#include <string.h>
+#endif
+
+#include "encrypt.h"
+#include "auth.h"
+#include "misc.h"
+
+int krb_mk_encpwd_req P((KTEXT, char *, char *, char *, char *, char *, char *));
+int krb_rd_encpwd_req P((KTEXT, char *, char *, u_long, AUTH_DAT *, char *, char *, char *, char *));
+
+extern auth_debug_mode;
+
+static unsigned char str_data[1024] = { IAC, SB, TELOPT_AUTHENTICATION, 0,
+			  		AUTHTYPE_KRB4_ENCPWD, };
+static unsigned char str_name[1024] = { IAC, SB, TELOPT_AUTHENTICATION,
+					TELQUAL_NAME, };
+
+#define	KRB4_ENCPWD_AUTH	0	/* Authentication data follows */
+#define	KRB4_ENCPWD_REJECT	1	/* Rejected (reason might follow) */
+#define KRB4_ENCPWD_ACCEPT	2	/* Accepted */
+#define	KRB4_ENCPWD_CHALLENGE	3	/* Challenge for mutual auth. */
+#define	KRB4_ENCPWD_ACK		4	/* Acknowledge */
+
+#define KRB_SERVICE_NAME    "rcmd"
+
+static	KTEXT_ST auth;
+static	char name[ANAME_SZ];
+static	char user_passwd[ANAME_SZ];
+static	AUTH_DAT adat = { 0 };
+#ifdef	ENCRYPTION
+static Block	session_key	= { 0 };
+#endif	/* ENCRYPTION */
+static Schedule sched;
+static char  challenge[REALM_SZ];
+
+	static int
+Data(ap, type, d, c)
+	Authenticator *ap;
+	int type;
+	void *d;
+	int c;
+{
+	unsigned char *p = str_data + 4;
+	unsigned char *cd = (unsigned char *)d;
+
+	if (c == -1)
+		c = strlen((char *)cd);
+
+	if (0) {
+		printf("%s:%d: [%d] (%d)",
+			str_data[3] == TELQUAL_IS ? ">>>IS" : ">>>REPLY",
+			str_data[3],
+			type, c);
+		printd(d, c);
+		printf("\r\n");
+	}
+	*p++ = ap->type;
+	*p++ = ap->way;
+	*p++ = type;
+	while (c-- > 0) {
+		if ((*p++ = *cd++) == IAC)
+			*p++ = IAC;
+	}
+	*p++ = IAC;
+	*p++ = SE;
+	if (str_data[3] == TELQUAL_IS)
+		printsub('>', &str_data[2], p - (&str_data[2]));
+	return(net_write(str_data, p - str_data));
+}
+
+	int
+krb4encpwd_init(ap, server)
+	Authenticator *ap;
+	int server;
+{
+	char hostname[80], *cp, *realm;
+	C_Block skey;
+
+	if (server) {
+		str_data[3] = TELQUAL_REPLY;
+	} else {
+		str_data[3] = TELQUAL_IS;
+		gethostname(hostname, sizeof(hostname));
+		realm = krb_realmofhost(hostname);
+		cp = strchr(hostname, '.');
+		if (*cp != NULL) *cp = NULL;
+		if (read_service_key(KRB_SERVICE_NAME, hostname, realm, 0,
+					KEYFILE, (char *)skey)) {
+		  return(0);
+		}
+	}
+	return(1);
+}
+
+	int
+krb4encpwd_send(ap)
+	Authenticator *ap;
+{
+
+	printf("[ Trying KRB4ENCPWD ... ]\n");
+	if (!UserNameRequested) {
+		return(0);
+	}
+	if (!auth_sendname(UserNameRequested, strlen(UserNameRequested))) {
+		return(0);
+	}
+
+	if (!Data(ap, KRB4_ENCPWD_ACK, (void *)NULL, 0)) {
+		return(0);
+	}
+
+	return(1);
+}
+
+	void
+krb4encpwd_is(ap, data, cnt)
+	Authenticator *ap;
+	unsigned char *data;
+	int cnt;
+{
+	Session_Key skey;
+	Block datablock;
+	char  r_passwd[ANAME_SZ], r_user[ANAME_SZ];
+	char  lhostname[ANAME_SZ], *cp;
+	int r;
+	time_t now;
+
+	if (cnt-- < 1)
+		return;
+	switch (*data++) {
+	case KRB4_ENCPWD_AUTH:
+		memmove((void *)auth.dat, (void *)data, auth.length = cnt);
+
+		gethostname(lhostname, sizeof(lhostname));
+		if ((cp = strchr(lhostname, '.')) != 0)  *cp = '\0';
+
+		if (r = krb_rd_encpwd_req(&auth, KRB_SERVICE_NAME, lhostname, 0, &adat, NULL, challenge, r_user, r_passwd)) {
+			Data(ap, KRB4_ENCPWD_REJECT, (void *)"Auth failed", -1);
+			auth_finished(ap, AUTH_REJECT);
+			return;
+		}
+		auth_encrypt_userpwd(r_passwd);
+		if (passwdok(UserNameRequested, UserPassword) == 0) {
+		  /*
+		   *  illegal username and password
+		   */
+		  Data(ap, KRB4_ENCPWD_REJECT, (void *)"Illegal password", -1);
+		  auth_finished(ap, AUTH_REJECT);
+		  return;
+		}
+
+		memmove((void *)session_key, (void *)adat.session, sizeof(Block));
+		Data(ap, KRB4_ENCPWD_ACCEPT, (void *)0, 0);
+		auth_finished(ap, AUTH_USER);
+		break;
+
+	case KRB4_ENCPWD_CHALLENGE:
+		/*
+		 *  Take the received random challenge text and save
+		 *  for future authentication.
+		 */
+		memmove((void *)challenge, (void *)data, sizeof(Block));
+		break;
+
+
+	case KRB4_ENCPWD_ACK:
+		/*
+		 *  Receive ack, if mutual then send random challenge
+		 */
+
+		/*
+		 * If we are doing mutual authentication, get set up to send
+		 * the challenge, and verify it when the response comes back.
+		 */
+
+		if ((ap->way & AUTH_HOW_MASK) == AUTH_HOW_MUTUAL) {
+		  register int i;
+
+		  time(&now);
+		  sprintf(challenge, "%x", now);
+		  Data(ap, KRB4_ENCPWD_CHALLENGE, (void *)challenge, strlen(challenge));
+		}
+		break;
+
+	default:
+		Data(ap, KRB4_ENCPWD_REJECT, 0, 0);
+		break;
+	}
+}
+
+
+	void
+krb4encpwd_reply(ap, data, cnt)
+	Authenticator *ap;
+	unsigned char *data;
+	int cnt;
+{
+	Session_Key skey;
+	KTEXT_ST krb_token;
+	Block enckey;
+	CREDENTIALS cred;
+	int r;
+	char	randchal[REALM_SZ], instance[ANAME_SZ], *cp;
+	char	hostname[80], *realm;
+
+	if (cnt-- < 1)
+		return;
+	switch (*data++) {
+	case KRB4_ENCPWD_REJECT:
+		if (cnt > 0) {
+			printf("[ KRB4_ENCPWD refuses authentication because %.*s ]\r\n",
+				cnt, data);
+		} else
+			printf("[ KRB4_ENCPWD refuses authentication ]\r\n");
+		auth_send_retry();
+		return;
+	case KRB4_ENCPWD_ACCEPT:
+		printf("[ KRB4_ENCPWD accepts you ]\n");
+		auth_finished(ap, AUTH_USER);
+		return;
+	case KRB4_ENCPWD_CHALLENGE:
+		/*
+		 * Verify that the response to the challenge is correct.
+		 */
+
+		gethostname(hostname, sizeof(hostname));
+		realm = krb_realmofhost(hostname);
+		memmove((void *)challenge, (void *)data, cnt);
+		memset(user_passwd, 0, sizeof(user_passwd));
+		local_des_read_pw_string(user_passwd, sizeof(user_passwd)-1, "Password: ", 0);
+		UserPassword = user_passwd;
+		Challenge = challenge;
+		strcpy(instance, RemoteHostName);
+		if ((cp = strchr(instance, '.')) != 0)  *cp = '\0';
+
+		if (r = krb_mk_encpwd_req(&krb_token, KRB_SERVICE_NAME, instance, realm, Challenge, UserNameRequested, user_passwd)) {
+		  krb_token.length = 0;
+		}
+
+		if (!Data(ap, KRB4_ENCPWD_AUTH, (void *)krb_token.dat, krb_token.length)) {
+		  return;
+		}
+
+		break;
+
+	default:
+		return;
+	}
+}
+
+	int
+krb4encpwd_status(ap, name, level)
+	Authenticator *ap;
+	char *name;
+	int level;
+{
+
+	if (level < AUTH_USER)
+		return(level);
+
+	if (UserNameRequested && passwdok(UserNameRequested, UserPassword)) {
+		strcpy(name, UserNameRequested);
+		return(AUTH_VALID);
+	} else {
+		return(AUTH_USER);
+	}
+}
+
+#define	BUMP(buf, len)		while (*(buf)) {++(buf), --(len);}
+#define	ADDC(buf, len, c)	if ((len) > 0) {*(buf)++ = (c); --(len);}
+
+	void
+krb4encpwd_printsub(data, cnt, buf, buflen)
+	unsigned char *data, *buf;
+	int cnt, buflen;
+{
+	char lbuf[32];
+	register int i;
+
+	buf[buflen-1] = '\0';		/* make sure its NULL terminated */
+	buflen -= 1;
+
+	switch(data[3]) {
+	case KRB4_ENCPWD_REJECT:	/* Rejected (reason might follow) */
+		strncpy((char *)buf, " REJECT ", buflen);
+		goto common;
+
+	case KRB4_ENCPWD_ACCEPT:	/* Accepted (name might follow) */
+		strncpy((char *)buf, " ACCEPT ", buflen);
+	common:
+		BUMP(buf, buflen);
+		if (cnt <= 4)
+			break;
+		ADDC(buf, buflen, '"');
+		for (i = 4; i < cnt; i++)
+			ADDC(buf, buflen, data[i]);
+		ADDC(buf, buflen, '"');
+		ADDC(buf, buflen, '\0');
+		break;
+
+	case KRB4_ENCPWD_AUTH:		/* Authentication data follows */
+		strncpy((char *)buf, " AUTH", buflen);
+		goto common2;
+
+	case KRB4_ENCPWD_CHALLENGE:
+		strncpy((char *)buf, " CHALLENGE", buflen);
+		goto common2;
+
+	case KRB4_ENCPWD_ACK:
+		strncpy((char *)buf, " ACK", buflen);
+		goto common2;
+
+	default:
+		sprintf(lbuf, " %d (unknown)", data[3]);
+		strncpy((char *)buf, lbuf, buflen);
+	common2:
+		BUMP(buf, buflen);
+		for (i = 4; i < cnt; i++) {
+			sprintf(lbuf, " %d", data[i]);
+			strncpy((char *)buf, lbuf, buflen);
+			BUMP(buf, buflen);
+		}
+		break;
+	}
+}
+
+int passwdok(name, passwd)
+char *name, *passwd;
+{
+  char *crypt();
+  char *salt, *p;
+  struct passwd *pwd;
+  int   passwdok_status = 0;
+
+  if (pwd = getpwnam(name))
+    salt = pwd->pw_passwd;
+  else salt = "xx";
+
+  p = crypt(passwd, salt);
+
+  if (pwd && !strcmp(p, pwd->pw_passwd)) {
+    passwdok_status = 1;
+  } else passwdok_status = 0;
+  return(passwdok_status);
+}
+
+#endif
+
+#ifdef notdef
+
+prkey(msg, key)
+	char *msg;
+	unsigned char *key;
+{
+	register int i;
+	printf("%s:", msg);
+	for (i = 0; i < 8; i++)
+		printf(" %3d", key[i]);
+	printf("\r\n");
+}
+#endif
diff --git a/contrib/telnet/libtelnet/misc-proto.h b/contrib/telnet/libtelnet/misc-proto.h
new file mode 100644
index 0000000..e5f334a
--- /dev/null
+++ b/contrib/telnet/libtelnet/misc-proto.h
@@ -0,0 +1,79 @@
+/*-
+ * Copyright (c) 1991, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *	@(#)misc-proto.h	8.1 (Berkeley) 6/4/93
+ */
+
+/*
+ * Copyright (C) 1990 by the Massachusetts Institute of Technology
+ *
+ * Export of this software from the United States of America is assumed
+ * to require a specific license from the United States Government.
+ * It is the responsibility of any person or organization contemplating
+ * export to obtain such a license before exporting.
+ *
+ * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
+ * distribute this software and its documentation for any purpose and
+ * without fee is hereby granted, provided that the above copyright
+ * notice appear in all copies and that both that copyright notice and
+ * this permission notice appear in supporting documentation, and that
+ * the name of M.I.T. not be used in advertising or publicity pertaining
+ * to distribution of the software without specific, written prior
+ * permission.  M.I.T. makes no representations about the suitability of
+ * this software for any purpose.  It is provided "as is" without express
+ * or implied warranty.
+ */
+
+#ifndef	__MISC_PROTO__
+#define	__MISC_PROTO__
+
+#if	!defined(P)
+#ifdef	__STDC__
+#define	P(x)	x
+#else
+#define	P(x)	()
+#endif
+#endif
+
+void auth_encrypt_init P((char *, char *, char *, int));
+void auth_encrypt_connect P((int));
+void printd P((unsigned char *, int));
+
+/*
+ * These functions are imported from the application
+ */
+int net_write P((unsigned char *, int));
+void net_encrypt P((void));
+int telnet_spin P((void));
+char *telnet_getenv P((char *));
+char *telnet_gets P((char *, char *, int, int));
+#endif
diff --git a/contrib/telnet/libtelnet/misc.c b/contrib/telnet/libtelnet/misc.c
new file mode 100644
index 0000000..9565900
--- /dev/null
+++ b/contrib/telnet/libtelnet/misc.c
@@ -0,0 +1,94 @@
+/*-
+ * Copyright (c) 1991, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef lint
+static char sccsid[] = "@(#)misc.c	8.1 (Berkeley) 6/4/93";
+#endif /* not lint */
+
+#include "misc.h"
+
+char *RemoteHostName;
+char *LocalHostName;
+char *UserNameRequested = 0;
+int ConnectedCount = 0;
+
+	void
+auth_encrypt_init(local, remote, name, server)
+	char *local;
+	char *remote;
+	char *name;
+	int server;
+{
+	RemoteHostName = remote;
+	LocalHostName = local;
+#if	defined(AUTHENTICATION)
+	auth_init(name, server);
+#endif
+#ifdef	ENCRYPTION
+	encrypt_init(name, server);
+#endif	/* ENCRYPTION */
+	if (UserNameRequested) {
+		free(UserNameRequested);
+		UserNameRequested = 0;
+	}
+}
+
+	void
+auth_encrypt_user(name)
+	char *name;
+{
+	extern char *strdup();
+
+	if (UserNameRequested)
+		free(UserNameRequested);
+	UserNameRequested = name ? strdup(name) : 0;
+}
+
+	void
+auth_encrypt_connect(cnt)
+	int cnt;
+{
+}
+
+	void
+printd(data, cnt)
+	unsigned char *data;
+	int cnt;
+{
+	if (cnt > 16)
+		cnt = 16;
+	while (cnt-- > 0) {
+		printf(" %02x", *data);
+		++data;
+	}
+}
diff --git a/contrib/telnet/libtelnet/misc.h b/contrib/telnet/libtelnet/misc.h
new file mode 100644
index 0000000..41ffa7f
--- /dev/null
+++ b/contrib/telnet/libtelnet/misc.h
@@ -0,0 +1,42 @@
+/*-
+ * Copyright (c) 1991, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *	@(#)misc.h	8.1 (Berkeley) 6/4/93
+ */
+
+extern char *UserNameRequested;
+extern char *LocalHostName;
+extern char *RemoteHostName;
+extern int ConnectedCount;
+extern int ReservedPort;
+
+#include "misc-proto.h"
diff --git a/contrib/telnet/libtelnet/read_password.c b/contrib/telnet/libtelnet/read_password.c
new file mode 100644
index 0000000..4676ed3
--- /dev/null
+++ b/contrib/telnet/libtelnet/read_password.c
@@ -0,0 +1,145 @@
+/*-
+ * Copyright (c) 1992, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef lint
+static char sccsid[] = "@(#)read_password.c	8.3 (Berkeley) 5/30/95";
+#endif /* not lint */
+
+/*
+ * $Source: /mit/kerberos/src/lib/des/RCS/read_password.c,v $
+ * $Author: jon $
+ *
+ * Copyright 1985, 1986, 1987, 1988 by the Massachusetts Institute
+ * of Technology.
+ *
+ * For copying and distribution information, please see the file
+ * <mit-copyright.h>.
+ *
+ * This routine prints the supplied string to standard
+ * output as a prompt, and reads a password string without
+ * echoing.
+ */
+
+#if	defined(RSA_ENCPWD) || defined(KRB4_ENCPWD)
+
+#include <stdio.h>
+#include <strings.h>
+#include <sys/ioctl.h>
+#include <signal.h>
+#include <setjmp.h>
+
+static jmp_buf env;
+
+/*** Routines ****************************************************** */
+/*
+ * This version just returns the string, doesn't map to key.
+ *
+ * Returns 0 on success, non-zero on failure.
+ */
+
+int
+local_des_read_pw_string(s,max,prompt,verify)
+    char *s;
+    int	max;
+    char *prompt;
+    int	verify;
+{
+    int ok = 0;
+    char *ptr;
+
+    jmp_buf old_env;
+    struct sgttyb tty_state;
+    char key_string[BUFSIZ];
+
+    if (max > BUFSIZ) {
+	return -1;
+    }
+
+    /* XXX assume jmp_buf is typedef'ed to an array */
+    memmove((char *)env, (char *)old_env, sizeof(env));
+    if (setjmp(env))
+	goto lose;
+
+    /* save terminal state*/
+    if (ioctl(0,TIOCGETP,(char *)&tty_state) == -1)
+	return -1;
+/*
+    push_signals();
+*/
+    /* Turn off echo */
+    tty_state.sg_flags &= ~ECHO;
+    if (ioctl(0,TIOCSETP,(char *)&tty_state) == -1)
+	return -1;
+    while (!ok) {
+	(void) printf(prompt);
+	(void) fflush(stdout);
+	while (!fgets(s, max, stdin));
+
+	if ((ptr = strchr(s, '\n')))
+	    *ptr = '\0';
+	if (verify) {
+	    printf("\nVerifying, please re-enter %s",prompt);
+	    (void) fflush(stdout);
+	    if (!fgets(key_string, sizeof(key_string), stdin)) {
+		clearerr(stdin);
+		continue;
+	    }
+	    if ((ptr = strchr(key_string, '\n')))
+	    *ptr = '\0';
+	    if (strcmp(s,key_string)) {
+		printf("\n\07\07Mismatch - try again\n");
+		(void) fflush(stdout);
+		continue;
+	    }
+	}
+	ok = 1;
+    }
+
+lose:
+    if (!ok)
+	memset(s, 0, max);
+    printf("\n");
+    /* turn echo back on */
+    tty_state.sg_flags |= ECHO;
+    if (ioctl(0,TIOCSETP,(char *)&tty_state))
+	ok = 0;
+/*
+    pop_signals();
+*/
+    memmove((char *)old_env, (char *)env, sizeof(env));
+    if (verify)
+	memset(key_string, 0, sizeof (key_string));
+    s[max-1] = 0;		/* force termination */
+    return !ok;			/* return nonzero if not okay */
+}
+#endif	/* defined(RSA_ENCPWD) || defined(KRB4_ENCPWD) */
diff --git a/contrib/telnet/libtelnet/rsaencpwd.c b/contrib/telnet/libtelnet/rsaencpwd.c
new file mode 100644
index 0000000..5906d99
--- /dev/null
+++ b/contrib/telnet/libtelnet/rsaencpwd.c
@@ -0,0 +1,492 @@
+/*-
+ * Copyright (c) 1992, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef lint
+static char sccsid[] = "@(#)rsaencpwd.c	8.3 (Berkeley) 5/30/95";
+#endif /* not lint */
+
+
+#ifdef	RSA_ENCPWD
+/*
+ * COPYRIGHT (C) 1990 DIGITAL EQUIPMENT CORPORATION
+ * ALL RIGHTS RESERVED
+ *
+ * "Digital Equipment Corporation authorizes the reproduction,
+ * distribution and modification of this software subject to the following
+ * restrictions:
+ *
+ * 1.  Any partial or whole copy of this software, or any modification
+ * thereof, must include this copyright notice in its entirety.
+ *
+ * 2.  This software is supplied "as is" with no warranty of any kind,
+ * expressed or implied, for any purpose, including any warranty of fitness
+ * or merchantibility.  DIGITAL assumes no responsibility for the use or
+ * reliability of this software, nor promises to provide any form of
+ * support for it on any basis.
+ *
+ * 3.  Distribution of this software is authorized only if no profit or
+ * remuneration of any kind is received in exchange for such distribution.
+ *
+ * 4.  This software produces public key authentication certificates
+ * bearing an expiration date established by DIGITAL and RSA Data
+ * Security, Inc.  It may cease to generate certificates after the expiration
+ * date.  Any modification of this software that changes or defeats
+ * the expiration date or its effect is unauthorized.
+ *
+ * 5.  Software that will renew or extend the expiration date of
+ * authentication certificates produced by this software may be obtained
+ * from RSA Data Security, Inc., 10 Twin Dolphin Drive, Redwood City, CA
+ * 94065, (415)595-8782, or from DIGITAL"
+ *
+ */
+
+#include <sys/types.h>
+#include <arpa/telnet.h>
+#include <pwd.h>
+#include <stdio.h>
+
+#ifdef	__STDC__
+#include <stdlib.h>
+#endif
+#ifdef	NO_STRING_H
+#include <strings.h>
+#else
+#include <string.h>
+#endif
+
+#include "encrypt.h"
+#include "auth.h"
+#include "misc.h"
+#include "cdc.h"
+
+extern auth_debug_mode;
+
+static unsigned char str_data[1024] = { IAC, SB, TELOPT_AUTHENTICATION, 0,
+			  		AUTHTYPE_RSA_ENCPWD, };
+static unsigned char str_name[1024] = { IAC, SB, TELOPT_AUTHENTICATION,
+					TELQUAL_NAME, };
+
+#define	RSA_ENCPWD_AUTH	0	/* Authentication data follows */
+#define	RSA_ENCPWD_REJECT	1	/* Rejected (reason might follow) */
+#define RSA_ENCPWD_ACCEPT	2	/* Accepted */
+#define	RSA_ENCPWD_CHALLENGEKEY	3	/* Challenge and public key */
+
+#define NAME_SZ   40
+#define CHAL_SZ   20
+#define PWD_SZ    40
+
+static	KTEXT_ST auth;
+static	char name[NAME_SZ];
+static	char user_passwd[PWD_SZ];
+static  char key_file[2*NAME_SZ];
+static  char lhostname[NAME_SZ];
+static char  challenge[CHAL_SZ];
+static int   challenge_len;
+
+	static int
+Data(ap, type, d, c)
+	Authenticator *ap;
+	int type;
+	void *d;
+	int c;
+{
+	unsigned char *p = str_data + 4;
+	unsigned char *cd = (unsigned char *)d;
+
+	if (c == -1)
+		c = strlen((char *)cd);
+
+	if (0) {
+		printf("%s:%d: [%d] (%d)",
+			str_data[3] == TELQUAL_IS ? ">>>IS" : ">>>REPLY",
+			str_data[3],
+			type, c);
+		printd(d, c);
+		printf("\r\n");
+	}
+	*p++ = ap->type;
+	*p++ = ap->way;
+	if (type != NULL) *p++ = type;
+	while (c-- > 0) {
+		if ((*p++ = *cd++) == IAC)
+			*p++ = IAC;
+	}
+	*p++ = IAC;
+	*p++ = SE;
+	if (str_data[3] == TELQUAL_IS)
+		printsub('>', &str_data[2], p - (&str_data[2]));
+	return(net_write(str_data, p - str_data));
+}
+
+	int
+rsaencpwd_init(ap, server)
+	Authenticator *ap;
+	int server;
+{
+	char  *cp;
+	FILE  *fp;
+
+	if (server) {
+		str_data[3] = TELQUAL_REPLY;
+		memset(key_file, 0, sizeof(key_file));
+		gethostname(lhostname, sizeof(lhostname));
+		if ((cp = strchr(lhostname, '.')) != 0)  *cp = '\0';
+		strcpy(key_file, "/etc/.");
+		strcat(key_file, lhostname);
+		strcat(key_file, "_privkey");
+		if ((fp=fopen(key_file, "r"))==NULL) return(0);
+		fclose(fp);
+	} else {
+		str_data[3] = TELQUAL_IS;
+	}
+	return(1);
+}
+
+	int
+rsaencpwd_send(ap)
+	Authenticator *ap;
+{
+
+	printf("[ Trying RSAENCPWD ... ]\n");
+	if (!UserNameRequested) {
+		return(0);
+	}
+	if (!auth_sendname(UserNameRequested, strlen(UserNameRequested))) {
+		return(0);
+	}
+	if (!Data(ap, NULL, (void *)NULL, 0)) {
+		return(0);
+	}
+
+
+	return(1);
+}
+
+	void
+rsaencpwd_is(ap, data, cnt)
+	Authenticator *ap;
+	unsigned char *data;
+	int cnt;
+{
+	Session_Key skey;
+	Block datablock;
+	char  r_passwd[PWD_SZ], r_user[NAME_SZ];
+	char  *cp, key[160];
+	char  chalkey[160], *ptr;
+	FILE  *fp;
+	int r, i, j, chalkey_len, len;
+	time_t now;
+
+	cnt--;
+	switch (*data++) {
+	case RSA_ENCPWD_AUTH:
+		memmove((void *)auth.dat, (void *)data, auth.length = cnt);
+
+		if ((fp=fopen(key_file, "r"))==NULL) {
+		  Data(ap, RSA_ENCPWD_REJECT, (void *)"Auth failed", -1);
+		  auth_finished(ap, AUTH_REJECT);
+		  return;
+		}
+		/*
+		 *  get privkey
+		 */
+		fscanf(fp, "%x;", &len);
+		for (i=0;i<len;i++) {
+		  j = getc(fp);  key[i]=j;
+		}
+		fclose(fp);
+
+		r = accept_rsa_encpwd(&auth, key, challenge,
+				      challenge_len, r_passwd);
+		if (r < 0) {
+		  Data(ap, RSA_ENCPWD_REJECT, (void *)"Auth failed", -1);
+		  auth_finished(ap, AUTH_REJECT);
+		  return;
+		}
+		auth_encrypt_userpwd(r_passwd);
+		if (rsaencpwd_passwdok(UserNameRequested, UserPassword) == 0) {
+		  /*
+		   *  illegal username and password
+		   */
+		  Data(ap, RSA_ENCPWD_REJECT, (void *)"Illegal password", -1);
+		  auth_finished(ap, AUTH_REJECT);
+		  return;
+		}
+
+		Data(ap, RSA_ENCPWD_ACCEPT, (void *)0, 0);
+		auth_finished(ap, AUTH_USER);
+		break;
+
+
+	case IAC:
+
+		/*
+		 * If we are doing mutual authentication, get set up to send
+		 * the challenge, and verify it when the response comes back.
+		 */
+		if ((ap->way & AUTH_HOW_MASK) == AUTH_HOW_ONE_WAY) {
+		  register int i;
+
+
+		  time(&now);
+		  if ((now % 2) == 0) {
+		    sprintf(challenge, "%x", now);
+		    challenge_len = strlen(challenge);
+		  } else {
+		    strcpy(challenge, "randchal");
+		    challenge_len = 8;
+		  }
+
+		  if ((fp=fopen(key_file, "r"))==NULL) {
+		    Data(ap, RSA_ENCPWD_REJECT, (void *)"Auth failed", -1);
+		    auth_finished(ap, AUTH_REJECT);
+		    return;
+		  }
+		  /*
+		   *  skip privkey
+		   */
+		  fscanf(fp, "%x;", &len);
+		  for (i=0;i<len;i++) {
+		    j = getc(fp);
+		  }
+		  /*
+		   * get pubkey
+		   */
+		  fscanf(fp, "%x;", &len);
+		  for (i=0;i<len;i++) {
+		    j = getc(fp);  key[i]=j;
+		  }
+		  fclose(fp);
+		  chalkey[0] = 0x30;
+		  ptr = (char *) &chalkey[1];
+		  chalkey_len = 1+NumEncodeLengthOctets(i)+i+1+NumEncodeLengthOctets(challenge_len)+challenge_len;
+		  EncodeLength(ptr, chalkey_len);
+		  ptr +=NumEncodeLengthOctets(chalkey_len);
+		  *ptr++ = 0x04;  /* OCTET STRING */
+		  *ptr++ = challenge_len;
+		  memmove(ptr, challenge, challenge_len);
+		  ptr += challenge_len;
+		  *ptr++ = 0x04;  /* OCTET STRING */
+		  EncodeLength(ptr, i);
+		  ptr += NumEncodeLengthOctets(i);
+		  memmove(ptr, key, i);
+		  chalkey_len = 1+NumEncodeLengthOctets(chalkey_len)+chalkey_len;
+		  Data(ap, RSA_ENCPWD_CHALLENGEKEY, (void *)chalkey, chalkey_len);
+		}
+		break;
+
+	default:
+		Data(ap, RSA_ENCPWD_REJECT, 0, 0);
+		break;
+	}
+}
+
+
+	void
+rsaencpwd_reply(ap, data, cnt)
+	Authenticator *ap;
+	unsigned char *data;
+	int cnt;
+{
+	Session_Key skey;
+	KTEXT_ST token;
+	Block enckey;
+	int r, pubkey_len;
+	char	randchal[CHAL_SZ], *cp;
+	char	chalkey[160], pubkey[128], *ptr;
+
+	if (cnt-- < 1)
+		return;
+	switch (*data++) {
+	case RSA_ENCPWD_REJECT:
+		if (cnt > 0) {
+			printf("[ RSA_ENCPWD refuses authentication because %.*s ]\r\n",
+				cnt, data);
+		} else
+			printf("[ RSA_ENCPWD refuses authentication ]\r\n");
+		auth_send_retry();
+		return;
+	case RSA_ENCPWD_ACCEPT:
+		printf("[ RSA_ENCPWD accepts you ]\n");
+		auth_finished(ap, AUTH_USER);
+		return;
+	case RSA_ENCPWD_CHALLENGEKEY:
+		/*
+		 * Verify that the response to the challenge is correct.
+		 */
+
+		memmove((void *)chalkey, (void *)data, cnt);
+		ptr = (char *) &chalkey[0];
+		ptr += DecodeHeaderLength(chalkey);
+		if (*ptr != 0x04) {
+		  return;
+		}
+		*ptr++;
+		challenge_len = DecodeValueLength(ptr);
+		ptr += NumEncodeLengthOctets(challenge_len);
+		memmove(challenge, ptr, challenge_len);
+		ptr += challenge_len;
+		if (*ptr != 0x04) {
+		  return;
+		}
+		*ptr++;
+		pubkey_len = DecodeValueLength(ptr);
+		ptr += NumEncodeLengthOctets(pubkey_len);
+		memmove(pubkey, ptr, pubkey_len);
+		memset(user_passwd, 0, sizeof(user_passwd));
+		local_des_read_pw_string(user_passwd, sizeof(user_passwd)-1, "Password: ", 0);
+		UserPassword = user_passwd;
+		Challenge = challenge;
+		r = init_rsa_encpwd(&token, user_passwd, challenge, challenge_len, pubkey);
+		if (r < 0) {
+		  token.length = 1;
+		}
+
+		if (!Data(ap, RSA_ENCPWD_AUTH, (void *)token.dat, token.length)) {
+		  return;
+		}
+
+		break;
+
+	default:
+		return;
+	}
+}
+
+	int
+rsaencpwd_status(ap, name, level)
+	Authenticator *ap;
+	char *name;
+	int level;
+{
+
+	if (level < AUTH_USER)
+		return(level);
+
+	if (UserNameRequested && rsaencpwd_passwdok(UserNameRequested, UserPassword)) {
+		strcpy(name, UserNameRequested);
+		return(AUTH_VALID);
+	} else {
+		return(AUTH_USER);
+	}
+}
+
+#define	BUMP(buf, len)		while (*(buf)) {++(buf), --(len);}
+#define	ADDC(buf, len, c)	if ((len) > 0) {*(buf)++ = (c); --(len);}
+
+	void
+rsaencpwd_printsub(data, cnt, buf, buflen)
+	unsigned char *data, *buf;
+	int cnt, buflen;
+{
+	char lbuf[32];
+	register int i;
+
+	buf[buflen-1] = '\0';		/* make sure its NULL terminated */
+	buflen -= 1;
+
+	switch(data[3]) {
+	case RSA_ENCPWD_REJECT:	/* Rejected (reason might follow) */
+		strncpy((char *)buf, " REJECT ", buflen);
+		goto common;
+
+	case RSA_ENCPWD_ACCEPT:	/* Accepted (name might follow) */
+		strncpy((char *)buf, " ACCEPT ", buflen);
+	common:
+		BUMP(buf, buflen);
+		if (cnt <= 4)
+			break;
+		ADDC(buf, buflen, '"');
+		for (i = 4; i < cnt; i++)
+			ADDC(buf, buflen, data[i]);
+		ADDC(buf, buflen, '"');
+		ADDC(buf, buflen, '\0');
+		break;
+
+	case RSA_ENCPWD_AUTH:		/* Authentication data follows */
+		strncpy((char *)buf, " AUTH", buflen);
+		goto common2;
+
+	case RSA_ENCPWD_CHALLENGEKEY:
+		strncpy((char *)buf, " CHALLENGEKEY", buflen);
+		goto common2;
+
+	default:
+		sprintf(lbuf, " %d (unknown)", data[3]);
+		strncpy((char *)buf, lbuf, buflen);
+	common2:
+		BUMP(buf, buflen);
+		for (i = 4; i < cnt; i++) {
+			sprintf(lbuf, " %d", data[i]);
+			strncpy((char *)buf, lbuf, buflen);
+			BUMP(buf, buflen);
+		}
+		break;
+	}
+}
+
+int rsaencpwd_passwdok(name, passwd)
+char *name, *passwd;
+{
+  char *crypt();
+  char *salt, *p;
+  struct passwd *pwd;
+  int   passwdok_status = 0;
+
+  if (pwd = getpwnam(name))
+    salt = pwd->pw_passwd;
+  else salt = "xx";
+
+  p = crypt(passwd, salt);
+
+  if (pwd && !strcmp(p, pwd->pw_passwd)) {
+    passwdok_status = 1;
+  } else passwdok_status = 0;
+  return(passwdok_status);
+}
+
+#endif
+
+#ifdef notdef
+
+prkey(msg, key)
+	char *msg;
+	unsigned char *key;
+{
+	register int i;
+	printf("%s:", msg);
+	for (i = 0; i < 8; i++)
+		printf(" %3d", key[i]);
+	printf("\r\n");
+}
+#endif
diff --git a/contrib/telnet/libtelnet/spx.c b/contrib/telnet/libtelnet/spx.c
new file mode 100644
index 0000000..86c6197
--- /dev/null
+++ b/contrib/telnet/libtelnet/spx.c
@@ -0,0 +1,588 @@
+/*-
+ * Copyright (c) 1992, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef lint
+static char sccsid[] = "@(#)spx.c	8.2 (Berkeley) 5/30/95";
+#endif /* not lint */
+
+#ifdef	SPX
+/*
+ * COPYRIGHT (C) 1990 DIGITAL EQUIPMENT CORPORATION
+ * ALL RIGHTS RESERVED
+ *
+ * "Digital Equipment Corporation authorizes the reproduction,
+ * distribution and modification of this software subject to the following
+ * restrictions:
+ *
+ * 1.  Any partial or whole copy of this software, or any modification
+ * thereof, must include this copyright notice in its entirety.
+ *
+ * 2.  This software is supplied "as is" with no warranty of any kind,
+ * expressed or implied, for any purpose, including any warranty of fitness
+ * or merchantibility.  DIGITAL assumes no responsibility for the use or
+ * reliability of this software, nor promises to provide any form of
+ * support for it on any basis.
+ *
+ * 3.  Distribution of this software is authorized only if no profit or
+ * remuneration of any kind is received in exchange for such distribution.
+ *
+ * 4.  This software produces public key authentication certificates
+ * bearing an expiration date established by DIGITAL and RSA Data
+ * Security, Inc.  It may cease to generate certificates after the expiration
+ * date.  Any modification of this software that changes or defeats
+ * the expiration date or its effect is unauthorized.
+ *
+ * 5.  Software that will renew or extend the expiration date of
+ * authentication certificates produced by this software may be obtained
+ * from RSA Data Security, Inc., 10 Twin Dolphin Drive, Redwood City, CA
+ * 94065, (415)595-8782, or from DIGITAL"
+ *
+ */
+
+#include <sys/types.h>
+#include <arpa/telnet.h>
+#include <stdio.h>
+#include "gssapi_defs.h"
+#ifdef	__STDC__
+#include <stdlib.h>
+#endif
+#ifdef	NO_STRING_H
+#include <strings.h>
+#else
+#include <string.h>
+#endif
+
+#include <pwd.h>
+#include "encrypt.h"
+#include "auth.h"
+#include "misc.h"
+
+extern auth_debug_mode;
+
+static unsigned char str_data[1024] = { IAC, SB, TELOPT_AUTHENTICATION, 0,
+			  		AUTHTYPE_SPX, };
+static unsigned char str_name[1024] = { IAC, SB, TELOPT_AUTHENTICATION,
+					TELQUAL_NAME, };
+
+#define	SPX_AUTH	0		/* Authentication data follows */
+#define	SPX_REJECT	1		/* Rejected (reason might follow) */
+#define SPX_ACCEPT	2		/* Accepted */
+
+#ifdef	ENCRYPTION
+static Block	session_key	= { 0 };
+#endif	/* ENCRYPTION */
+static Schedule sched;
+static Block	challenge	= { 0 };
+
+
+/*******************************************************************/
+
+gss_OID_set		actual_mechs;
+gss_OID			actual_mech_type, output_name_type;
+int			major_status, status, msg_ctx = 0, new_status;
+int			req_flags = 0, ret_flags, lifetime_rec;
+gss_cred_id_t		gss_cred_handle;
+gss_ctx_id_t		actual_ctxhandle, context_handle;
+gss_buffer_desc		output_token, input_token, input_name_buffer;
+gss_buffer_desc		status_string;
+gss_name_t		desired_targname, src_name;
+gss_channel_bindings	input_chan_bindings;
+char			lhostname[GSS_C_MAX_PRINTABLE_NAME];
+char			targ_printable[GSS_C_MAX_PRINTABLE_NAME];
+int			to_addr=0, from_addr=0;
+char			*address;
+gss_buffer_desc		fullname_buffer;
+gss_OID			fullname_type;
+gss_cred_id_t		gss_delegated_cred_handle;
+
+/*******************************************************************/
+
+
+
+	static int
+Data(ap, type, d, c)
+	Authenticator *ap;
+	int type;
+	void *d;
+	int c;
+{
+	unsigned char *p = str_data + 4;
+	unsigned char *cd = (unsigned char *)d;
+
+	if (c == -1)
+		c = strlen((char *)cd);
+
+	if (0) {
+		printf("%s:%d: [%d] (%d)",
+			str_data[3] == TELQUAL_IS ? ">>>IS" : ">>>REPLY",
+			str_data[3],
+			type, c);
+		printd(d, c);
+		printf("\r\n");
+	}
+	*p++ = ap->type;
+	*p++ = ap->way;
+	*p++ = type;
+	while (c-- > 0) {
+		if ((*p++ = *cd++) == IAC)
+			*p++ = IAC;
+	}
+	*p++ = IAC;
+	*p++ = SE;
+	if (str_data[3] == TELQUAL_IS)
+		printsub('>', &str_data[2], p - (&str_data[2]));
+	return(net_write(str_data, p - str_data));
+}
+
+	int
+spx_init(ap, server)
+	Authenticator *ap;
+	int server;
+{
+	gss_cred_id_t	tmp_cred_handle;
+
+	if (server) {
+		str_data[3] = TELQUAL_REPLY;
+		gethostname(lhostname, sizeof(lhostname));
+		strcpy(targ_printable, "SERVICE:rcmd@");
+		strcat(targ_printable, lhostname);
+		input_name_buffer.length = strlen(targ_printable);
+		input_name_buffer.value = targ_printable;
+		major_status = gss_import_name(&status,
+					&input_name_buffer,
+					GSS_C_NULL_OID,
+					&desired_targname);
+		major_status = gss_acquire_cred(&status,
+					desired_targname,
+					0,
+					GSS_C_NULL_OID_SET,
+					GSS_C_ACCEPT,
+					&tmp_cred_handle,
+					&actual_mechs,
+					&lifetime_rec);
+		if (major_status != GSS_S_COMPLETE) return(0);
+	} else {
+		str_data[3] = TELQUAL_IS;
+	}
+	return(1);
+}
+
+	int
+spx_send(ap)
+	Authenticator *ap;
+{
+	Block enckey;
+	int r;
+
+	gss_OID	actual_mech_type, output_name_type;
+	int	msg_ctx = 0, new_status, status;
+	int	req_flags = 0, ret_flags, lifetime_rec, major_status;
+	gss_buffer_desc  output_token, input_token, input_name_buffer;
+	gss_buffer_desc  output_name_buffer, status_string;
+	gss_name_t    desired_targname;
+	gss_channel_bindings  input_chan_bindings;
+	char targ_printable[GSS_C_MAX_PRINTABLE_NAME];
+	int  from_addr=0, to_addr=0, myhostlen, j;
+	int  deleg_flag=1, mutual_flag=0, replay_flag=0, seq_flag=0;
+	char *address;
+
+	printf("[ Trying SPX ... ]\n");
+	strcpy(targ_printable, "SERVICE:rcmd@");
+	strcat(targ_printable, RemoteHostName);
+
+	input_name_buffer.length = strlen(targ_printable);
+	input_name_buffer.value = targ_printable;
+
+	if (!UserNameRequested) {
+		return(0);
+	}
+
+	major_status = gss_import_name(&status,
+					&input_name_buffer,
+					GSS_C_NULL_OID,
+					&desired_targname);
+
+
+	major_status = gss_display_name(&status,
+					desired_targname,
+					&output_name_buffer,
+					&output_name_type);
+
+	printf("target is '%s'\n", output_name_buffer.value); fflush(stdout);
+
+	major_status = gss_release_buffer(&status, &output_name_buffer);
+
+	input_chan_bindings = (gss_channel_bindings)
+	  malloc(sizeof(gss_channel_bindings_desc));
+
+	input_chan_bindings->initiator_addrtype = GSS_C_AF_INET;
+	input_chan_bindings->initiator_address.length = 4;
+	address = (char *) malloc(4);
+	input_chan_bindings->initiator_address.value = (char *) address;
+	address[0] = ((from_addr & 0xff000000) >> 24);
+	address[1] = ((from_addr & 0xff0000) >> 16);
+	address[2] = ((from_addr & 0xff00) >> 8);
+	address[3] = (from_addr & 0xff);
+	input_chan_bindings->acceptor_addrtype = GSS_C_AF_INET;
+	input_chan_bindings->acceptor_address.length = 4;
+	address = (char *) malloc(4);
+	input_chan_bindings->acceptor_address.value = (char *) address;
+	address[0] = ((to_addr & 0xff000000) >> 24);
+	address[1] = ((to_addr & 0xff0000) >> 16);
+	address[2] = ((to_addr & 0xff00) >> 8);
+	address[3] = (to_addr & 0xff);
+	input_chan_bindings->application_data.length = 0;
+
+	req_flags = 0;
+	if (deleg_flag)  req_flags = req_flags | 1;
+	if (mutual_flag) req_flags = req_flags | 2;
+	if (replay_flag) req_flags = req_flags | 4;
+	if (seq_flag)    req_flags = req_flags | 8;
+
+	major_status = gss_init_sec_context(&status,         /* minor status */
+					GSS_C_NO_CREDENTIAL, /* cred handle */
+					&actual_ctxhandle,   /* ctx handle */
+					desired_targname,    /* target name */
+					GSS_C_NULL_OID,      /* mech type */
+					req_flags,           /* req flags */
+					0,                   /* time req */
+					input_chan_bindings, /* chan binding */
+					GSS_C_NO_BUFFER,     /* input token */
+					&actual_mech_type,   /* actual mech */
+					&output_token,       /* output token */
+					&ret_flags,          /* ret flags */
+					&lifetime_rec);      /* time rec */
+
+	if ((major_status != GSS_S_COMPLETE) &&
+	    (major_status != GSS_S_CONTINUE_NEEDED)) {
+	  gss_display_status(&new_status,
+				status,
+				GSS_C_MECH_CODE,
+				GSS_C_NULL_OID,
+				&msg_ctx,
+				&status_string);
+	  printf("%s\n", status_string.value);
+	  return(0);
+	}
+
+	if (!auth_sendname(UserNameRequested, strlen(UserNameRequested))) {
+		return(0);
+	}
+
+	if (!Data(ap, SPX_AUTH, (void *)output_token.value, output_token.length)) {
+		return(0);
+	}
+
+	return(1);
+}
+
+	void
+spx_is(ap, data, cnt)
+	Authenticator *ap;
+	unsigned char *data;
+	int cnt;
+{
+	Session_Key skey;
+	Block datablock;
+	int r;
+
+	if (cnt-- < 1)
+		return;
+	switch (*data++) {
+	case SPX_AUTH:
+		input_token.length = cnt;
+		input_token.value = (char *) data;
+
+		gethostname(lhostname, sizeof(lhostname));
+
+		strcpy(targ_printable, "SERVICE:rcmd@");
+		strcat(targ_printable, lhostname);
+
+		input_name_buffer.length = strlen(targ_printable);
+		input_name_buffer.value = targ_printable;
+
+		major_status = gss_import_name(&status,
+					&input_name_buffer,
+					GSS_C_NULL_OID,
+					&desired_targname);
+
+		major_status = gss_acquire_cred(&status,
+					desired_targname,
+					0,
+					GSS_C_NULL_OID_SET,
+					GSS_C_ACCEPT,
+					&gss_cred_handle,
+					&actual_mechs,
+					&lifetime_rec);
+
+		major_status = gss_release_name(&status, desired_targname);
+
+		input_chan_bindings = (gss_channel_bindings)
+		  malloc(sizeof(gss_channel_bindings_desc));
+
+		input_chan_bindings->initiator_addrtype = GSS_C_AF_INET;
+		input_chan_bindings->initiator_address.length = 4;
+		address = (char *) malloc(4);
+		input_chan_bindings->initiator_address.value = (char *) address;
+		address[0] = ((from_addr & 0xff000000) >> 24);
+		address[1] = ((from_addr & 0xff0000) >> 16);
+		address[2] = ((from_addr & 0xff00) >> 8);
+		address[3] = (from_addr & 0xff);
+		input_chan_bindings->acceptor_addrtype = GSS_C_AF_INET;
+		input_chan_bindings->acceptor_address.length = 4;
+		address = (char *) malloc(4);
+		input_chan_bindings->acceptor_address.value = (char *) address;
+		address[0] = ((to_addr & 0xff000000) >> 24);
+		address[1] = ((to_addr & 0xff0000) >> 16);
+		address[2] = ((to_addr & 0xff00) >> 8);
+		address[3] = (to_addr & 0xff);
+		input_chan_bindings->application_data.length = 0;
+
+		major_status = gss_accept_sec_context(&status,
+						&context_handle,
+						gss_cred_handle,
+						&input_token,
+						input_chan_bindings,
+						&src_name,
+						&actual_mech_type,
+						&output_token,
+						&ret_flags,
+						&lifetime_rec,
+						&gss_delegated_cred_handle);
+
+
+		if (major_status != GSS_S_COMPLETE) {
+
+		  major_status = gss_display_name(&status,
+					src_name,
+					&fullname_buffer,
+					&fullname_type);
+			Data(ap, SPX_REJECT, (void *)"auth failed", -1);
+			auth_finished(ap, AUTH_REJECT);
+			return;
+		}
+
+		major_status = gss_display_name(&status,
+					src_name,
+					&fullname_buffer,
+					&fullname_type);
+
+
+		Data(ap, SPX_ACCEPT, (void *)output_token.value, output_token.length);
+		auth_finished(ap, AUTH_USER);
+		break;
+
+	default:
+		Data(ap, SPX_REJECT, 0, 0);
+		break;
+	}
+}
+
+
+	void
+spx_reply(ap, data, cnt)
+	Authenticator *ap;
+	unsigned char *data;
+	int cnt;
+{
+	Session_Key skey;
+
+	if (cnt-- < 1)
+		return;
+	switch (*data++) {
+	case SPX_REJECT:
+		if (cnt > 0) {
+			printf("[ SPX refuses authentication because %.*s ]\r\n",
+				cnt, data);
+		} else
+			printf("[ SPX refuses authentication ]\r\n");
+		auth_send_retry();
+		return;
+	case SPX_ACCEPT:
+		printf("[ SPX accepts you ]\n");
+		if ((ap->way & AUTH_HOW_MASK) == AUTH_HOW_MUTUAL) {
+			/*
+			 * Send over the encrypted challenge.
+		 	 */
+		  input_token.value = (char *) data;
+		  input_token.length = cnt;
+
+		  major_status = gss_init_sec_context(&status, /* minor stat */
+					GSS_C_NO_CREDENTIAL, /* cred handle */
+					&actual_ctxhandle,   /* ctx handle */
+					desired_targname,    /* target name */
+					GSS_C_NULL_OID,      /* mech type */
+					req_flags,           /* req flags */
+					0,                   /* time req */
+					input_chan_bindings, /* chan binding */
+					&input_token,        /* input token */
+					&actual_mech_type,   /* actual mech */
+					&output_token,       /* output token */
+					&ret_flags,          /* ret flags */
+					&lifetime_rec);      /* time rec */
+
+		  if (major_status != GSS_S_COMPLETE) {
+		    gss_display_status(&new_status,
+					status,
+					GSS_C_MECH_CODE,
+					GSS_C_NULL_OID,
+					&msg_ctx,
+					&status_string);
+		    printf("[ SPX mutual response fails ... '%s' ]\r\n",
+			 status_string.value);
+		    auth_send_retry();
+		    return;
+		  }
+		}
+		auth_finished(ap, AUTH_USER);
+		return;
+
+	default:
+		return;
+	}
+}
+
+	int
+spx_status(ap, name, level)
+	Authenticator *ap;
+	char *name;
+	int level;
+{
+
+	gss_buffer_desc  fullname_buffer, acl_file_buffer;
+	gss_OID          fullname_type;
+	char acl_file[160], fullname[160];
+	int major_status, status = 0;
+	struct passwd  *pwd;
+
+	/*
+	 * hard code fullname to
+	 *   "SPX:/C=US/O=Digital/OU=LKG/OU=Sphinx/OU=Users/CN=Kannan Alagappan"
+	 * and acl_file to "~kannan/.sphinx"
+	 */
+
+	pwd = getpwnam(UserNameRequested);
+	if (pwd == NULL) {
+	  return(AUTH_USER);   /*  not authenticated  */
+	}
+
+	strcpy(acl_file, pwd->pw_dir);
+	strcat(acl_file, "/.sphinx");
+	acl_file_buffer.value = acl_file;
+	acl_file_buffer.length = strlen(acl_file);
+
+	major_status = gss_display_name(&status,
+					src_name,
+					&fullname_buffer,
+					&fullname_type);
+
+	if (level < AUTH_USER)
+		return(level);
+
+	major_status = gss__check_acl(&status, &fullname_buffer,
+					&acl_file_buffer);
+
+	if (major_status == GSS_S_COMPLETE) {
+	  strcpy(name, UserNameRequested);
+	  return(AUTH_VALID);
+	} else {
+	   return(AUTH_USER);
+	}
+
+}
+
+#define	BUMP(buf, len)		while (*(buf)) {++(buf), --(len);}
+#define	ADDC(buf, len, c)	if ((len) > 0) {*(buf)++ = (c); --(len);}
+
+	void
+spx_printsub(data, cnt, buf, buflen)
+	unsigned char *data, *buf;
+	int cnt, buflen;
+{
+	char lbuf[32];
+	register int i;
+
+	buf[buflen-1] = '\0';		/* make sure its NULL terminated */
+	buflen -= 1;
+
+	switch(data[3]) {
+	case SPX_REJECT:		/* Rejected (reason might follow) */
+		strncpy((char *)buf, " REJECT ", buflen);
+		goto common;
+
+	case SPX_ACCEPT:		/* Accepted (name might follow) */
+		strncpy((char *)buf, " ACCEPT ", buflen);
+	common:
+		BUMP(buf, buflen);
+		if (cnt <= 4)
+			break;
+		ADDC(buf, buflen, '"');
+		for (i = 4; i < cnt; i++)
+			ADDC(buf, buflen, data[i]);
+		ADDC(buf, buflen, '"');
+		ADDC(buf, buflen, '\0');
+		break;
+
+	case SPX_AUTH:			/* Authentication data follows */
+		strncpy((char *)buf, " AUTH", buflen);
+		goto common2;
+
+	default:
+		sprintf(lbuf, " %d (unknown)", data[3]);
+		strncpy((char *)buf, lbuf, buflen);
+	common2:
+		BUMP(buf, buflen);
+		for (i = 4; i < cnt; i++) {
+			sprintf(lbuf, " %d", data[i]);
+			strncpy((char *)buf, lbuf, buflen);
+			BUMP(buf, buflen);
+		}
+		break;
+	}
+}
+
+#endif
+
+#ifdef notdef
+
+prkey(msg, key)
+	char *msg;
+	unsigned char *key;
+{
+	register int i;
+	printf("%s:", msg);
+	for (i = 0; i < 8; i++)
+		printf(" %3d", key[i]);
+	printf("\r\n");
+}
+#endif
diff --git a/contrib/telnet/telnet/authenc.c b/contrib/telnet/telnet/authenc.c
new file mode 100644
index 0000000..545df78
--- /dev/null
+++ b/contrib/telnet/telnet/authenc.c
@@ -0,0 +1,111 @@
+/*-
+ * Copyright (c) 1991, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef lint
+static char sccsid[] = "@(#)authenc.c	8.1 (Berkeley) 6/6/93";
+#endif /* not lint */
+
+#if	defined(AUTHENTICATION) || defined(ENCRYPTION)
+#include <sys/types.h>
+#include <arpa/telnet.h>
+#include <libtelnet/encrypt.h>
+#include <libtelnet/misc.h>
+
+#include "general.h"
+#include "ring.h"
+#include "externs.h"
+#include "defines.h"
+#include "types.h"
+
+	int
+net_write(str, len)
+	unsigned char *str;
+	int len;
+{
+	if (NETROOM() > len) {
+		ring_supply_data(&netoring, str, len);
+		if (str[0] == IAC && str[1] == SE)
+			printsub('>', &str[2], len-2);
+		return(len);
+	}
+	return(0);
+}
+
+	void
+net_encrypt()
+{
+#ifdef	ENCRYPTION
+	if (encrypt_output)
+		ring_encrypt(&netoring, encrypt_output);
+	else
+		ring_clearto(&netoring);
+#endif	/* ENCRYPTION */
+}
+
+	int
+telnet_spin()
+{
+	return(-1);
+}
+
+	char *
+telnet_getenv(val)
+	char *val;
+{
+	return((char *)env_getvalue((unsigned char *)val));
+}
+
+	char *
+telnet_gets(prompt, result, length, echo)
+	char *prompt;
+	char *result;
+	int length;
+	int echo;
+{
+	extern char *getpass();
+	extern int globalmode;
+	int om = globalmode;
+	char *res;
+
+	TerminalNewMode(-1);
+	if (echo) {
+		printf("%s", prompt);
+		res = fgets(result, length, stdin);
+	} else if (res = getpass(prompt)) {
+		strncpy(result, res, length);
+		res = result;
+	}
+	TerminalNewMode(om);
+	return(res);
+}
+#endif	/* defined(AUTHENTICATION) || defined(ENCRYPTION) */
diff --git a/contrib/telnet/telnet/commands.c b/contrib/telnet/telnet/commands.c
new file mode 100644
index 0000000..41ef5cd
--- /dev/null
+++ b/contrib/telnet/telnet/commands.c
@@ -0,0 +1,2945 @@
+/*
+ * Copyright (c) 1988, 1990, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef lint
+static char sccsid[] = "@(#)commands.c	8.4 (Berkeley) 5/30/95";
+#endif /* not lint */
+
+#if	defined(unix)
+#include <sys/param.h>
+#if	defined(CRAY) || defined(sysV88)
+#include <sys/types.h>
+#endif
+#include <sys/file.h>
+#else
+#include <sys/types.h>
+#endif	/* defined(unix) */
+#include <sys/socket.h>
+#include <netinet/in.h>
+#ifdef	CRAY
+#include <fcntl.h>
+#endif	/* CRAY */
+
+#include <signal.h>
+#include <netdb.h>
+#include <ctype.h>
+#include <pwd.h>
+#include <varargs.h>
+#include <errno.h>
+
+#include <arpa/telnet.h>
+
+#include "general.h"
+
+#include "ring.h"
+
+#include "externs.h"
+#include "defines.h"
+#include "types.h"
+
+#if !defined(CRAY) && !defined(sysV88)
+#include <netinet/in_systm.h>
+# if (defined(vax) || defined(tahoe) || defined(hp300)) && !defined(ultrix)
+# include <machine/endian.h>
+# endif /* vax */
+#endif /* !defined(CRAY) && !defined(sysV88) */
+#include <netinet/ip.h>
+
+
+#ifndef	MAXHOSTNAMELEN
+#define	MAXHOSTNAMELEN 64
+#endif	MAXHOSTNAMELEN
+
+#if	defined(IPPROTO_IP) && defined(IP_TOS)
+int tos = -1;
+#endif	/* defined(IPPROTO_IP) && defined(IP_TOS) */
+
+char	*hostname;
+static char _hostname[MAXHOSTNAMELEN];
+
+extern char *getenv();
+
+extern int isprefix();
+extern char **genget();
+extern int Ambiguous();
+
+static call();
+
+typedef struct {
+	char	*name;		/* command name */
+	char	*help;		/* help string (NULL for no help) */
+	int	(*handler)();	/* routine which executes command */
+	int	needconnect;	/* Do we need to be connected to execute? */
+} Command;
+
+static char line[256];
+static char saveline[256];
+static int margc;
+static char *margv[20];
+
+    static void
+makeargv()
+{
+    register char *cp, *cp2, c;
+    register char **argp = margv;
+
+    margc = 0;
+    cp = line;
+    if (*cp == '!') {		/* Special case shell escape */
+	strcpy(saveline, line);	/* save for shell command */
+	*argp++ = "!";		/* No room in string to get this */
+	margc++;
+	cp++;
+    }
+    while (c = *cp) {
+	register int inquote = 0;
+	while (isspace(c))
+	    c = *++cp;
+	if (c == '\0')
+	    break;
+	*argp++ = cp;
+	margc += 1;
+	for (cp2 = cp; c != '\0'; c = *++cp) {
+	    if (inquote) {
+		if (c == inquote) {
+		    inquote = 0;
+		    continue;
+		}
+	    } else {
+		if (c == '\\') {
+		    if ((c = *++cp) == '\0')
+			break;
+		} else if (c == '"') {
+		    inquote = '"';
+		    continue;
+		} else if (c == '\'') {
+		    inquote = '\'';
+		    continue;
+		} else if (isspace(c))
+		    break;
+	    }
+	    *cp2++ = c;
+	}
+	*cp2 = '\0';
+	if (c == '\0')
+	    break;
+	cp++;
+    }
+    *argp++ = 0;
+}
+
+/*
+ * Make a character string into a number.
+ *
+ * Todo:  1.  Could take random integers (12, 0x12, 012, 0b1).
+ */
+
+	static
+special(s)
+	register char *s;
+{
+	register char c;
+	char b;
+
+	switch (*s) {
+	case '^':
+		b = *++s;
+		if (b == '?') {
+		    c = b | 0x40;		/* DEL */
+		} else {
+		    c = b & 0x1f;
+		}
+		break;
+	default:
+		c = *s;
+		break;
+	}
+	return c;
+}
+
+/*
+ * Construct a control character sequence
+ * for a special character.
+ */
+	static char *
+control(c)
+	register cc_t c;
+{
+	static char buf[5];
+	/*
+	 * The only way I could get the Sun 3.5 compiler
+	 * to shut up about
+	 *	if ((unsigned int)c >= 0x80)
+	 * was to assign "c" to an unsigned int variable...
+	 * Arggg....
+	 */
+	register unsigned int uic = (unsigned int)c;
+
+	if (uic == 0x7f)
+		return ("^?");
+	if (c == (cc_t)_POSIX_VDISABLE) {
+		return "off";
+	}
+	if (uic >= 0x80) {
+		buf[0] = '\\';
+		buf[1] = ((c>>6)&07) + '0';
+		buf[2] = ((c>>3)&07) + '0';
+		buf[3] = (c&07) + '0';
+		buf[4] = 0;
+	} else if (uic >= 0x20) {
+		buf[0] = c;
+		buf[1] = 0;
+	} else {
+		buf[0] = '^';
+		buf[1] = '@'+c;
+		buf[2] = 0;
+	}
+	return (buf);
+}
+
+
+
+/*
+ *	The following are data structures and routines for
+ *	the "send" command.
+ *
+ */
+
+struct sendlist {
+    char	*name;		/* How user refers to it (case independent) */
+    char	*help;		/* Help information (0 ==> no help) */
+    int		needconnect;	/* Need to be connected */
+    int		narg;		/* Number of arguments */
+    int		(*handler)();	/* Routine to perform (for special ops) */
+    int		nbyte;		/* Number of bytes to send this command */
+    int		what;		/* Character to be sent (<0 ==> special) */
+};
+
+
+static int
+	send_esc P((void)),
+	send_help P((void)),
+	send_docmd P((char *)),
+	send_dontcmd P((char *)),
+	send_willcmd P((char *)),
+	send_wontcmd P((char *));
+
+static struct sendlist Sendlist[] = {
+    { "ao",	"Send Telnet Abort output",		1, 0, 0, 2, AO },
+    { "ayt",	"Send Telnet 'Are You There'",		1, 0, 0, 2, AYT },
+    { "brk",	"Send Telnet Break",			1, 0, 0, 2, BREAK },
+    { "break",	0,					1, 0, 0, 2, BREAK },
+    { "ec",	"Send Telnet Erase Character",		1, 0, 0, 2, EC },
+    { "el",	"Send Telnet Erase Line",		1, 0, 0, 2, EL },
+    { "escape",	"Send current escape character",	1, 0, send_esc, 1, 0 },
+    { "ga",	"Send Telnet 'Go Ahead' sequence",	1, 0, 0, 2, GA },
+    { "ip",	"Send Telnet Interrupt Process",	1, 0, 0, 2, IP },
+    { "intp",	0,					1, 0, 0, 2, IP },
+    { "interrupt", 0,					1, 0, 0, 2, IP },
+    { "intr",	0,					1, 0, 0, 2, IP },
+    { "nop",	"Send Telnet 'No operation'",		1, 0, 0, 2, NOP },
+    { "eor",	"Send Telnet 'End of Record'",		1, 0, 0, 2, EOR },
+    { "abort",	"Send Telnet 'Abort Process'",		1, 0, 0, 2, ABORT },
+    { "susp",	"Send Telnet 'Suspend Process'",	1, 0, 0, 2, SUSP },
+    { "eof",	"Send Telnet End of File Character",	1, 0, 0, 2, xEOF },
+    { "synch",	"Perform Telnet 'Synch operation'",	1, 0, dosynch, 2, 0 },
+    { "getstatus", "Send request for STATUS",		1, 0, get_status, 6, 0 },
+    { "?",	"Display send options",			0, 0, send_help, 0, 0 },
+    { "help",	0,					0, 0, send_help, 0, 0 },
+    { "do",	0,					0, 1, send_docmd, 3, 0 },
+    { "dont",	0,					0, 1, send_dontcmd, 3, 0 },
+    { "will",	0,					0, 1, send_willcmd, 3, 0 },
+    { "wont",	0,					0, 1, send_wontcmd, 3, 0 },
+    { 0 }
+};
+
+#define	GETSEND(name) ((struct sendlist *) genget(name, (char **) Sendlist, \
+				sizeof(struct sendlist)))
+
+    static int
+sendcmd(argc, argv)
+    int  argc;
+    char **argv;
+{
+    int count;		/* how many bytes we are going to need to send */
+    int i;
+    int question = 0;	/* was at least one argument a question */
+    struct sendlist *s;	/* pointer to current command */
+    int success = 0;
+    int needconnect = 0;
+
+    if (argc < 2) {
+	printf("need at least one argument for 'send' command\n");
+	printf("'send ?' for help\n");
+	return 0;
+    }
+    /*
+     * First, validate all the send arguments.
+     * In addition, we see how much space we are going to need, and
+     * whether or not we will be doing a "SYNCH" operation (which
+     * flushes the network queue).
+     */
+    count = 0;
+    for (i = 1; i < argc; i++) {
+	s = GETSEND(argv[i]);
+	if (s == 0) {
+	    printf("Unknown send argument '%s'\n'send ?' for help.\n",
+			argv[i]);
+	    return 0;
+	} else if (Ambiguous(s)) {
+	    printf("Ambiguous send argument '%s'\n'send ?' for help.\n",
+			argv[i]);
+	    return 0;
+	}
+	if (i + s->narg >= argc) {
+	    fprintf(stderr,
+	    "Need %d argument%s to 'send %s' command.  'send %s ?' for help.\n",
+		s->narg, s->narg == 1 ? "" : "s", s->name, s->name);
+	    return 0;
+	}
+	count += s->nbyte;
+	if (s->handler == send_help) {
+	    send_help();
+	    return 0;
+	}
+
+	i += s->narg;
+	needconnect += s->needconnect;
+    }
+    if (!connected && needconnect) {
+	printf("?Need to be connected first.\n");
+	printf("'send ?' for help\n");
+	return 0;
+    }
+    /* Now, do we have enough room? */
+    if (NETROOM() < count) {
+	printf("There is not enough room in the buffer TO the network\n");
+	printf("to process your request.  Nothing will be done.\n");
+	printf("('send synch' will throw away most data in the network\n");
+	printf("buffer, if this might help.)\n");
+	return 0;
+    }
+    /* OK, they are all OK, now go through again and actually send */
+    count = 0;
+    for (i = 1; i < argc; i++) {
+	if ((s = GETSEND(argv[i])) == 0) {
+	    fprintf(stderr, "Telnet 'send' error - argument disappeared!\n");
+	    (void) quit();
+	    /*NOTREACHED*/
+	}
+	if (s->handler) {
+	    count++;
+	    success += (*s->handler)((s->narg > 0) ? argv[i+1] : 0,
+				  (s->narg > 1) ? argv[i+2] : 0);
+	    i += s->narg;
+	} else {
+	    NET2ADD(IAC, s->what);
+	    printoption("SENT", IAC, s->what);
+	}
+    }
+    return (count == success);
+}
+
+    static int
+send_esc()
+{
+    NETADD(escape);
+    return 1;
+}
+
+    static int
+send_docmd(name)
+    char *name;
+{
+    return(send_tncmd(send_do, "do", name));
+}
+
+    static int
+send_dontcmd(name)
+    char *name;
+{
+    return(send_tncmd(send_dont, "dont", name));
+}
+    static int
+send_willcmd(name)
+    char *name;
+{
+    return(send_tncmd(send_will, "will", name));
+}
+    static int
+send_wontcmd(name)
+    char *name;
+{
+    return(send_tncmd(send_wont, "wont", name));
+}
+
+    int
+send_tncmd(func, cmd, name)
+    void	(*func)();
+    char	*cmd, *name;
+{
+    char **cpp;
+    extern char *telopts[];
+    register int val = 0;
+
+    if (isprefix(name, "help") || isprefix(name, "?")) {
+	register int col, len;
+
+	printf("Usage: send %s <value|option>\n", cmd);
+	printf("\"value\" must be from 0 to 255\n");
+	printf("Valid options are:\n\t");
+
+	col = 8;
+	for (cpp = telopts; *cpp; cpp++) {
+	    len = strlen(*cpp) + 3;
+	    if (col + len > 65) {
+		printf("\n\t");
+		col = 8;
+	    }
+	    printf(" \"%s\"", *cpp);
+	    col += len;
+	}
+	printf("\n");
+	return 0;
+    }
+    cpp = (char **)genget(name, telopts, sizeof(char *));
+    if (Ambiguous(cpp)) {
+	fprintf(stderr,"'%s': ambiguous argument ('send %s ?' for help).\n",
+					name, cmd);
+	return 0;
+    }
+    if (cpp) {
+	val = cpp - telopts;
+    } else {
+	register char *cp = name;
+
+	while (*cp >= '0' && *cp <= '9') {
+	    val *= 10;
+	    val += *cp - '0';
+	    cp++;
+	}
+	if (*cp != 0) {
+	    fprintf(stderr, "'%s': unknown argument ('send %s ?' for help).\n",
+					name, cmd);
+	    return 0;
+	} else if (val < 0 || val > 255) {
+	    fprintf(stderr, "'%s': bad value ('send %s ?' for help).\n",
+					name, cmd);
+	    return 0;
+	}
+    }
+    if (!connected) {
+	printf("?Need to be connected first.\n");
+	return 0;
+    }
+    (*func)(val, 1);
+    return 1;
+}
+
+    static int
+send_help()
+{
+    struct sendlist *s;	/* pointer to current command */
+    for (s = Sendlist; s->name; s++) {
+	if (s->help)
+	    printf("%-15s %s\n", s->name, s->help);
+    }
+    return(0);
+}
+
+/*
+ * The following are the routines and data structures referred
+ * to by the arguments to the "toggle" command.
+ */
+
+    static int
+lclchars()
+{
+    donelclchars = 1;
+    return 1;
+}
+
+    static int
+togdebug()
+{
+#ifndef	NOT43
+    if (net > 0 &&
+	(SetSockOpt(net, SOL_SOCKET, SO_DEBUG, debug)) < 0) {
+	    perror("setsockopt (SO_DEBUG)");
+    }
+#else	/* NOT43 */
+    if (debug) {
+	if (net > 0 && SetSockOpt(net, SOL_SOCKET, SO_DEBUG, 0, 0) < 0)
+	    perror("setsockopt (SO_DEBUG)");
+    } else
+	printf("Cannot turn off socket debugging\n");
+#endif	/* NOT43 */
+    return 1;
+}
+
+
+    static int
+togcrlf()
+{
+    if (crlf) {
+	printf("Will send carriage returns as telnet <CR><LF>.\n");
+    } else {
+	printf("Will send carriage returns as telnet <CR><NUL>.\n");
+    }
+    return 1;
+}
+
+int binmode;
+
+    static int
+togbinary(val)
+    int val;
+{
+    donebinarytoggle = 1;
+
+    if (val >= 0) {
+	binmode = val;
+    } else {
+	if (my_want_state_is_will(TELOPT_BINARY) &&
+				my_want_state_is_do(TELOPT_BINARY)) {
+	    binmode = 1;
+	} else if (my_want_state_is_wont(TELOPT_BINARY) &&
+				my_want_state_is_dont(TELOPT_BINARY)) {
+	    binmode = 0;
+	}
+	val = binmode ? 0 : 1;
+    }
+
+    if (val == 1) {
+	if (my_want_state_is_will(TELOPT_BINARY) &&
+					my_want_state_is_do(TELOPT_BINARY)) {
+	    printf("Already operating in binary mode with remote host.\n");
+	} else {
+	    printf("Negotiating binary mode with remote host.\n");
+	    tel_enter_binary(3);
+	}
+    } else {
+	if (my_want_state_is_wont(TELOPT_BINARY) &&
+					my_want_state_is_dont(TELOPT_BINARY)) {
+	    printf("Already in network ascii mode with remote host.\n");
+	} else {
+	    printf("Negotiating network ascii mode with remote host.\n");
+	    tel_leave_binary(3);
+	}
+    }
+    return 1;
+}
+
+    static int
+togrbinary(val)
+    int val;
+{
+    donebinarytoggle = 1;
+
+    if (val == -1)
+	val = my_want_state_is_do(TELOPT_BINARY) ? 0 : 1;
+
+    if (val == 1) {
+	if (my_want_state_is_do(TELOPT_BINARY)) {
+	    printf("Already receiving in binary mode.\n");
+	} else {
+	    printf("Negotiating binary mode on input.\n");
+	    tel_enter_binary(1);
+	}
+    } else {
+	if (my_want_state_is_dont(TELOPT_BINARY)) {
+	    printf("Already receiving in network ascii mode.\n");
+	} else {
+	    printf("Negotiating network ascii mode on input.\n");
+	    tel_leave_binary(1);
+	}
+    }
+    return 1;
+}
+
+    static int
+togxbinary(val)
+    int val;
+{
+    donebinarytoggle = 1;
+
+    if (val == -1)
+	val = my_want_state_is_will(TELOPT_BINARY) ? 0 : 1;
+
+    if (val == 1) {
+	if (my_want_state_is_will(TELOPT_BINARY)) {
+	    printf("Already transmitting in binary mode.\n");
+	} else {
+	    printf("Negotiating binary mode on output.\n");
+	    tel_enter_binary(2);
+	}
+    } else {
+	if (my_want_state_is_wont(TELOPT_BINARY)) {
+	    printf("Already transmitting in network ascii mode.\n");
+	} else {
+	    printf("Negotiating network ascii mode on output.\n");
+	    tel_leave_binary(2);
+	}
+    }
+    return 1;
+}
+
+
+static int togglehelp P((void));
+#if	defined(AUTHENTICATION)
+extern int auth_togdebug P((int));
+#endif
+#ifdef	ENCRYPTION
+extern int EncryptAutoEnc P((int));
+extern int EncryptAutoDec P((int));
+extern int EncryptDebug P((int));
+extern int EncryptVerbose P((int));
+#endif	/* ENCRYPTION */
+
+struct togglelist {
+    char	*name;		/* name of toggle */
+    char	*help;		/* help message */
+    int		(*handler)();	/* routine to do actual setting */
+    int		*variable;
+    char	*actionexplanation;
+};
+
+static struct togglelist Togglelist[] = {
+    { "autoflush",
+	"flushing of output when sending interrupt characters",
+	    0,
+		&autoflush,
+		    "flush output when sending interrupt characters" },
+    { "autosynch",
+	"automatic sending of interrupt characters in urgent mode",
+	    0,
+		&autosynch,
+		    "send interrupt characters in urgent mode" },
+#if	defined(AUTHENTICATION)
+    { "autologin",
+	"automatic sending of login and/or authentication info",
+	    0,
+		&autologin,
+		    "send login name and/or authentication information" },
+    { "authdebug",
+	"Toggle authentication debugging",
+	    auth_togdebug,
+		0,
+		     "print authentication debugging information" },
+#endif
+#ifdef	ENCRYPTION
+    { "autoencrypt",
+	"automatic encryption of data stream",
+	    EncryptAutoEnc,
+		0,
+		    "automatically encrypt output" },
+    { "autodecrypt",
+	"automatic decryption of data stream",
+	    EncryptAutoDec,
+		0,
+		    "automatically decrypt input" },
+    { "verbose_encrypt",
+	"Toggle verbose encryption output",
+	    EncryptVerbose,
+		0,
+		    "print verbose encryption output" },
+    { "encdebug",
+	"Toggle encryption debugging",
+	    EncryptDebug,
+		0,
+		    "print encryption debugging information" },
+#endif	/* ENCRYPTION */
+    { "skiprc",
+	"don't read ~/.telnetrc file",
+	    0,
+		&skiprc,
+		    "skip reading of ~/.telnetrc file" },
+    { "binary",
+	"sending and receiving of binary data",
+	    togbinary,
+		0,
+		    0 },
+    { "inbinary",
+	"receiving of binary data",
+	    togrbinary,
+		0,
+		    0 },
+    { "outbinary",
+	"sending of binary data",
+	    togxbinary,
+		0,
+		    0 },
+    { "crlf",
+	"sending carriage returns as telnet <CR><LF>",
+	    togcrlf,
+		&crlf,
+		    0 },
+    { "crmod",
+	"mapping of received carriage returns",
+	    0,
+		&crmod,
+		    "map carriage return on output" },
+    { "localchars",
+	"local recognition of certain control characters",
+	    lclchars,
+		&localchars,
+		    "recognize certain control characters" },
+    { " ", "", 0 },		/* empty line */
+#if	defined(unix) && defined(TN3270)
+    { "apitrace",
+	"(debugging) toggle tracing of API transactions",
+	    0,
+		&apitrace,
+		    "trace API transactions" },
+    { "cursesdata",
+	"(debugging) toggle printing of hexadecimal curses data",
+	    0,
+		&cursesdata,
+		    "print hexadecimal representation of curses data" },
+#endif	/* defined(unix) && defined(TN3270) */
+    { "debug",
+	"debugging",
+	    togdebug,
+		&debug,
+		    "turn on socket level debugging" },
+    { "netdata",
+	"printing of hexadecimal network data (debugging)",
+	    0,
+		&netdata,
+		    "print hexadecimal representation of network traffic" },
+    { "prettydump",
+	"output of \"netdata\" to user readable format (debugging)",
+	    0,
+		&prettydump,
+		    "print user readable output for \"netdata\"" },
+    { "options",
+	"viewing of options processing (debugging)",
+	    0,
+		&showoptions,
+		    "show option processing" },
+#if	defined(unix)
+    { "termdata",
+	"(debugging) toggle printing of hexadecimal terminal data",
+	    0,
+		&termdata,
+		    "print hexadecimal representation of terminal traffic" },
+#endif	/* defined(unix) */
+    { "?",
+	0,
+	    togglehelp },
+    { "help",
+	0,
+	    togglehelp },
+    { 0 }
+};
+
+    static int
+togglehelp()
+{
+    struct togglelist *c;
+
+    for (c = Togglelist; c->name; c++) {
+	if (c->help) {
+	    if (*c->help)
+		printf("%-15s toggle %s\n", c->name, c->help);
+	    else
+		printf("\n");
+	}
+    }
+    printf("\n");
+    printf("%-15s %s\n", "?", "display help information");
+    return 0;
+}
+
+    static void
+settogglehelp(set)
+    int set;
+{
+    struct togglelist *c;
+
+    for (c = Togglelist; c->name; c++) {
+	if (c->help) {
+	    if (*c->help)
+		printf("%-15s %s %s\n", c->name, set ? "enable" : "disable",
+						c->help);
+	    else
+		printf("\n");
+	}
+    }
+}
+
+#define	GETTOGGLE(name) (struct togglelist *) \
+		genget(name, (char **) Togglelist, sizeof(struct togglelist))
+
+    static int
+toggle(argc, argv)
+    int  argc;
+    char *argv[];
+{
+    int retval = 1;
+    char *name;
+    struct togglelist *c;
+
+    if (argc < 2) {
+	fprintf(stderr,
+	    "Need an argument to 'toggle' command.  'toggle ?' for help.\n");
+	return 0;
+    }
+    argc--;
+    argv++;
+    while (argc--) {
+	name = *argv++;
+	c = GETTOGGLE(name);
+	if (Ambiguous(c)) {
+	    fprintf(stderr, "'%s': ambiguous argument ('toggle ?' for help).\n",
+					name);
+	    return 0;
+	} else if (c == 0) {
+	    fprintf(stderr, "'%s': unknown argument ('toggle ?' for help).\n",
+					name);
+	    return 0;
+	} else {
+	    if (c->variable) {
+		*c->variable = !*c->variable;		/* invert it */
+		if (c->actionexplanation) {
+		    printf("%s %s.\n", *c->variable? "Will" : "Won't",
+							c->actionexplanation);
+		}
+	    }
+	    if (c->handler) {
+		retval &= (*c->handler)(-1);
+	    }
+	}
+    }
+    return retval;
+}
+
+/*
+ * The following perform the "set" command.
+ */
+
+#ifdef	USE_TERMIO
+struct termio new_tc = { 0 };
+#endif
+
+struct setlist {
+    char *name;				/* name */
+    char *help;				/* help information */
+    void (*handler)();
+    cc_t *charp;			/* where it is located at */
+};
+
+static struct setlist Setlist[] = {
+#ifdef	KLUDGELINEMODE
+    { "echo", 	"character to toggle local echoing on/off", 0, &echoc },
+#endif
+    { "escape",	"character to escape back to telnet command mode", 0, &escape },
+    { "rlogin", "rlogin escape character", 0, &rlogin },
+    { "tracefile", "file to write trace information to", SetNetTrace, (cc_t *)NetTraceFile},
+    { " ", "" },
+    { " ", "The following need 'localchars' to be toggled true", 0, 0 },
+    { "flushoutput", "character to cause an Abort Output", 0, termFlushCharp },
+    { "interrupt", "character to cause an Interrupt Process", 0, termIntCharp },
+    { "quit",	"character to cause an Abort process", 0, termQuitCharp },
+    { "eof",	"character to cause an EOF ", 0, termEofCharp },
+    { " ", "" },
+    { " ", "The following are for local editing in linemode", 0, 0 },
+    { "erase",	"character to use to erase a character", 0, termEraseCharp },
+    { "kill",	"character to use to erase a line", 0, termKillCharp },
+    { "lnext",	"character to use for literal next", 0, termLiteralNextCharp },
+    { "susp",	"character to cause a Suspend Process", 0, termSuspCharp },
+    { "reprint", "character to use for line reprint", 0, termRprntCharp },
+    { "worderase", "character to use to erase a word", 0, termWerasCharp },
+    { "start",	"character to use for XON", 0, termStartCharp },
+    { "stop",	"character to use for XOFF", 0, termStopCharp },
+    { "forw1",	"alternate end of line character", 0, termForw1Charp },
+    { "forw2",	"alternate end of line character", 0, termForw2Charp },
+    { "ayt",	"alternate AYT character", 0, termAytCharp },
+    { 0 }
+};
+
+#if	defined(CRAY) && !defined(__STDC__)
+/* Work around compiler bug in pcc 4.1.5 */
+    void
+_setlist_init()
+{
+#ifndef	KLUDGELINEMODE
+#define	N 5
+#else
+#define	N 6
+#endif
+	Setlist[N+0].charp = &termFlushChar;
+	Setlist[N+1].charp = &termIntChar;
+	Setlist[N+2].charp = &termQuitChar;
+	Setlist[N+3].charp = &termEofChar;
+	Setlist[N+6].charp = &termEraseChar;
+	Setlist[N+7].charp = &termKillChar;
+	Setlist[N+8].charp = &termLiteralNextChar;
+	Setlist[N+9].charp = &termSuspChar;
+	Setlist[N+10].charp = &termRprntChar;
+	Setlist[N+11].charp = &termWerasChar;
+	Setlist[N+12].charp = &termStartChar;
+	Setlist[N+13].charp = &termStopChar;
+	Setlist[N+14].charp = &termForw1Char;
+	Setlist[N+15].charp = &termForw2Char;
+	Setlist[N+16].charp = &termAytChar;
+#undef	N
+}
+#endif	/* defined(CRAY) && !defined(__STDC__) */
+
+    static struct setlist *
+getset(name)
+    char *name;
+{
+    return (struct setlist *)
+		genget(name, (char **) Setlist, sizeof(struct setlist));
+}
+
+    void
+set_escape_char(s)
+    char *s;
+{
+	if (rlogin != _POSIX_VDISABLE) {
+		rlogin = (s && *s) ? special(s) : _POSIX_VDISABLE;
+		printf("Telnet rlogin escape character is '%s'.\n",
+					control(rlogin));
+	} else {
+		escape = (s && *s) ? special(s) : _POSIX_VDISABLE;
+		printf("Telnet escape character is '%s'.\n", control(escape));
+	}
+}
+
+    static int
+setcmd(argc, argv)
+    int  argc;
+    char *argv[];
+{
+    int value;
+    struct setlist *ct;
+    struct togglelist *c;
+
+    if (argc < 2 || argc > 3) {
+	printf("Format is 'set Name Value'\n'set ?' for help.\n");
+	return 0;
+    }
+    if ((argc == 2) && (isprefix(argv[1], "?") || isprefix(argv[1], "help"))) {
+	for (ct = Setlist; ct->name; ct++)
+	    printf("%-15s %s\n", ct->name, ct->help);
+	printf("\n");
+	settogglehelp(1);
+	printf("%-15s %s\n", "?", "display help information");
+	return 0;
+    }
+
+    ct = getset(argv[1]);
+    if (ct == 0) {
+	c = GETTOGGLE(argv[1]);
+	if (c == 0) {
+	    fprintf(stderr, "'%s': unknown argument ('set ?' for help).\n",
+			argv[1]);
+	    return 0;
+	} else if (Ambiguous(c)) {
+	    fprintf(stderr, "'%s': ambiguous argument ('set ?' for help).\n",
+			argv[1]);
+	    return 0;
+	}
+	if (c->variable) {
+	    if ((argc == 2) || (strcmp("on", argv[2]) == 0))
+		*c->variable = 1;
+	    else if (strcmp("off", argv[2]) == 0)
+		*c->variable = 0;
+	    else {
+		printf("Format is 'set togglename [on|off]'\n'set ?' for help.\n");
+		return 0;
+	    }
+	    if (c->actionexplanation) {
+		printf("%s %s.\n", *c->variable? "Will" : "Won't",
+							c->actionexplanation);
+	    }
+	}
+	if (c->handler)
+	    (*c->handler)(1);
+    } else if (argc != 3) {
+	printf("Format is 'set Name Value'\n'set ?' for help.\n");
+	return 0;
+    } else if (Ambiguous(ct)) {
+	fprintf(stderr, "'%s': ambiguous argument ('set ?' for help).\n",
+			argv[1]);
+	return 0;
+    } else if (ct->handler) {
+	(*ct->handler)(argv[2]);
+	printf("%s set to \"%s\".\n", ct->name, (char *)ct->charp);
+    } else {
+	if (strcmp("off", argv[2])) {
+	    value = special(argv[2]);
+	} else {
+	    value = _POSIX_VDISABLE;
+	}
+	*(ct->charp) = (cc_t)value;
+	printf("%s character is '%s'.\n", ct->name, control(*(ct->charp)));
+    }
+    slc_check();
+    return 1;
+}
+
+    static int
+unsetcmd(argc, argv)
+    int  argc;
+    char *argv[];
+{
+    struct setlist *ct;
+    struct togglelist *c;
+    register char *name;
+
+    if (argc < 2) {
+	fprintf(stderr,
+	    "Need an argument to 'unset' command.  'unset ?' for help.\n");
+	return 0;
+    }
+    if (isprefix(argv[1], "?") || isprefix(argv[1], "help")) {
+	for (ct = Setlist; ct->name; ct++)
+	    printf("%-15s %s\n", ct->name, ct->help);
+	printf("\n");
+	settogglehelp(0);
+	printf("%-15s %s\n", "?", "display help information");
+	return 0;
+    }
+
+    argc--;
+    argv++;
+    while (argc--) {
+	name = *argv++;
+	ct = getset(name);
+	if (ct == 0) {
+	    c = GETTOGGLE(name);
+	    if (c == 0) {
+		fprintf(stderr, "'%s': unknown argument ('unset ?' for help).\n",
+			name);
+		return 0;
+	    } else if (Ambiguous(c)) {
+		fprintf(stderr, "'%s': ambiguous argument ('unset ?' for help).\n",
+			name);
+		return 0;
+	    }
+	    if (c->variable) {
+		*c->variable = 0;
+		if (c->actionexplanation) {
+		    printf("%s %s.\n", *c->variable? "Will" : "Won't",
+							c->actionexplanation);
+		}
+	    }
+	    if (c->handler)
+		(*c->handler)(0);
+	} else if (Ambiguous(ct)) {
+	    fprintf(stderr, "'%s': ambiguous argument ('unset ?' for help).\n",
+			name);
+	    return 0;
+	} else if (ct->handler) {
+	    (*ct->handler)(0);
+	    printf("%s reset to \"%s\".\n", ct->name, (char *)ct->charp);
+	} else {
+	    *(ct->charp) = _POSIX_VDISABLE;
+	    printf("%s character is '%s'.\n", ct->name, control(*(ct->charp)));
+	}
+    }
+    return 1;
+}
+
+/*
+ * The following are the data structures and routines for the
+ * 'mode' command.
+ */
+#ifdef	KLUDGELINEMODE
+extern int kludgelinemode;
+
+    static int
+dokludgemode()
+{
+    kludgelinemode = 1;
+    send_wont(TELOPT_LINEMODE, 1);
+    send_dont(TELOPT_SGA, 1);
+    send_dont(TELOPT_ECHO, 1);
+}
+#endif
+
+    static int
+dolinemode()
+{
+#ifdef	KLUDGELINEMODE
+    if (kludgelinemode)
+	send_dont(TELOPT_SGA, 1);
+#endif
+    send_will(TELOPT_LINEMODE, 1);
+    send_dont(TELOPT_ECHO, 1);
+    return 1;
+}
+
+    static int
+docharmode()
+{
+#ifdef	KLUDGELINEMODE
+    if (kludgelinemode)
+	send_do(TELOPT_SGA, 1);
+    else
+#endif
+    send_wont(TELOPT_LINEMODE, 1);
+    send_do(TELOPT_ECHO, 1);
+    return 1;
+}
+
+    static int
+dolmmode(bit, on)
+    int bit, on;
+{
+    unsigned char c;
+    extern int linemode;
+
+    if (my_want_state_is_wont(TELOPT_LINEMODE)) {
+	printf("?Need to have LINEMODE option enabled first.\n");
+	printf("'mode ?' for help.\n");
+	return 0;
+    }
+
+    if (on)
+	c = (linemode | bit);
+    else
+	c = (linemode & ~bit);
+    lm_mode(&c, 1, 1);
+    return 1;
+}
+
+    int
+setmode(bit)
+{
+    return dolmmode(bit, 1);
+}
+
+    int
+clearmode(bit)
+{
+    return dolmmode(bit, 0);
+}
+
+struct modelist {
+	char	*name;		/* command name */
+	char	*help;		/* help string */
+	int	(*handler)();	/* routine which executes command */
+	int	needconnect;	/* Do we need to be connected to execute? */
+	int	arg1;
+};
+
+extern int modehelp();
+
+static struct modelist ModeList[] = {
+    { "character", "Disable LINEMODE option",	docharmode, 1 },
+#ifdef	KLUDGELINEMODE
+    { "",	"(or disable obsolete line-by-line mode)", 0 },
+#endif
+    { "line",	"Enable LINEMODE option",	dolinemode, 1 },
+#ifdef	KLUDGELINEMODE
+    { "",	"(or enable obsolete line-by-line mode)", 0 },
+#endif
+    { "", "", 0 },
+    { "",	"These require the LINEMODE option to be enabled", 0 },
+    { "isig",	"Enable signal trapping",	setmode, 1, MODE_TRAPSIG },
+    { "+isig",	0,				setmode, 1, MODE_TRAPSIG },
+    { "-isig",	"Disable signal trapping",	clearmode, 1, MODE_TRAPSIG },
+    { "edit",	"Enable character editing",	setmode, 1, MODE_EDIT },
+    { "+edit",	0,				setmode, 1, MODE_EDIT },
+    { "-edit",	"Disable character editing",	clearmode, 1, MODE_EDIT },
+    { "softtabs", "Enable tab expansion",	setmode, 1, MODE_SOFT_TAB },
+    { "+softtabs", 0,				setmode, 1, MODE_SOFT_TAB },
+    { "-softtabs", "Disable character editing",	clearmode, 1, MODE_SOFT_TAB },
+    { "litecho", "Enable literal character echo", setmode, 1, MODE_LIT_ECHO },
+    { "+litecho", 0,				setmode, 1, MODE_LIT_ECHO },
+    { "-litecho", "Disable literal character echo", clearmode, 1, MODE_LIT_ECHO },
+    { "help",	0,				modehelp, 0 },
+#ifdef	KLUDGELINEMODE
+    { "kludgeline", 0,				dokludgemode, 1 },
+#endif
+    { "", "", 0 },
+    { "?",	"Print help information",	modehelp, 0 },
+    { 0 },
+};
+
+
+    int
+modehelp()
+{
+    struct modelist *mt;
+
+    printf("format is:  'mode Mode', where 'Mode' is one of:\n\n");
+    for (mt = ModeList; mt->name; mt++) {
+	if (mt->help) {
+	    if (*mt->help)
+		printf("%-15s %s\n", mt->name, mt->help);
+	    else
+		printf("\n");
+	}
+    }
+    return 0;
+}
+
+#define	GETMODECMD(name) (struct modelist *) \
+		genget(name, (char **) ModeList, sizeof(struct modelist))
+
+    static int
+modecmd(argc, argv)
+    int  argc;
+    char *argv[];
+{
+    struct modelist *mt;
+
+    if (argc != 2) {
+	printf("'mode' command requires an argument\n");
+	printf("'mode ?' for help.\n");
+    } else if ((mt = GETMODECMD(argv[1])) == 0) {
+	fprintf(stderr, "Unknown mode '%s' ('mode ?' for help).\n", argv[1]);
+    } else if (Ambiguous(mt)) {
+	fprintf(stderr, "Ambiguous mode '%s' ('mode ?' for help).\n", argv[1]);
+    } else if (mt->needconnect && !connected) {
+	printf("?Need to be connected first.\n");
+	printf("'mode ?' for help.\n");
+    } else if (mt->handler) {
+	return (*mt->handler)(mt->arg1);
+    }
+    return 0;
+}
+
+/*
+ * The following data structures and routines implement the
+ * "display" command.
+ */
+
+    static int
+display(argc, argv)
+    int  argc;
+    char *argv[];
+{
+    struct togglelist *tl;
+    struct setlist *sl;
+
+#define	dotog(tl)	if (tl->variable && tl->actionexplanation) { \
+			    if (*tl->variable) { \
+				printf("will"); \
+			    } else { \
+				printf("won't"); \
+			    } \
+			    printf(" %s.\n", tl->actionexplanation); \
+			}
+
+#define	doset(sl)   if (sl->name && *sl->name != ' ') { \
+			if (sl->handler == 0) \
+			    printf("%-15s [%s]\n", sl->name, control(*sl->charp)); \
+			else \
+			    printf("%-15s \"%s\"\n", sl->name, (char *)sl->charp); \
+		    }
+
+    if (argc == 1) {
+	for (tl = Togglelist; tl->name; tl++) {
+	    dotog(tl);
+	}
+	printf("\n");
+	for (sl = Setlist; sl->name; sl++) {
+	    doset(sl);
+	}
+    } else {
+	int i;
+
+	for (i = 1; i < argc; i++) {
+	    sl = getset(argv[i]);
+	    tl = GETTOGGLE(argv[i]);
+	    if (Ambiguous(sl) || Ambiguous(tl)) {
+		printf("?Ambiguous argument '%s'.\n", argv[i]);
+		return 0;
+	    } else if (!sl && !tl) {
+		printf("?Unknown argument '%s'.\n", argv[i]);
+		return 0;
+	    } else {
+		if (tl) {
+		    dotog(tl);
+		}
+		if (sl) {
+		    doset(sl);
+		}
+	    }
+	}
+    }
+/*@*/optionstatus();
+#ifdef	ENCRYPTION
+    EncryptStatus();
+#endif	/* ENCRYPTION */
+    return 1;
+#undef	doset
+#undef	dotog
+}
+
+/*
+ * The following are the data structures, and many of the routines,
+ * relating to command processing.
+ */
+
+/*
+ * Set the escape character.
+ */
+	static int
+setescape(argc, argv)
+	int argc;
+	char *argv[];
+{
+	register char *arg;
+	char buf[50];
+
+	printf(
+	    "Deprecated usage - please use 'set escape%s%s' in the future.\n",
+				(argc > 2)? " ":"", (argc > 2)? argv[1]: "");
+	if (argc > 2)
+		arg = argv[1];
+	else {
+		printf("new escape character: ");
+		(void) fgets(buf, sizeof(buf), stdin);
+		arg = buf;
+	}
+	if (arg[0] != '\0')
+		escape = arg[0];
+	if (!In3270) {
+		printf("Escape character is '%s'.\n", control(escape));
+	}
+	(void) fflush(stdout);
+	return 1;
+}
+
+    /*VARARGS*/
+    static int
+togcrmod()
+{
+    crmod = !crmod;
+    printf("Deprecated usage - please use 'toggle crmod' in the future.\n");
+    printf("%s map carriage return on output.\n", crmod ? "Will" : "Won't");
+    (void) fflush(stdout);
+    return 1;
+}
+
+    /*VARARGS*/
+    int
+suspend()
+{
+#ifdef	SIGTSTP
+    setcommandmode();
+    {
+	long oldrows, oldcols, newrows, newcols, err;
+
+	err = (TerminalWindowSize(&oldrows, &oldcols) == 0) ? 1 : 0;
+	(void) kill(0, SIGTSTP);
+	/*
+	 * If we didn't get the window size before the SUSPEND, but we
+	 * can get them now (?), then send the NAWS to make sure that
+	 * we are set up for the right window size.
+	 */
+	if (TerminalWindowSize(&newrows, &newcols) && connected &&
+	    (err || ((oldrows != newrows) || (oldcols != newcols)))) {
+		sendnaws();
+	}
+    }
+    /* reget parameters in case they were changed */
+    TerminalSaveState();
+    setconnmode(0);
+#else
+    printf("Suspend is not supported.  Try the '!' command instead\n");
+#endif
+    return 1;
+}
+
+#if	!defined(TN3270)
+    /*ARGSUSED*/
+    int
+shell(argc, argv)
+    int argc;
+    char *argv[];
+{
+    long oldrows, oldcols, newrows, newcols, err;
+
+    setcommandmode();
+
+    err = (TerminalWindowSize(&oldrows, &oldcols) == 0) ? 1 : 0;
+    switch(vfork()) {
+    case -1:
+	perror("Fork failed\n");
+	break;
+
+    case 0:
+	{
+	    /*
+	     * Fire up the shell in the child.
+	     */
+	    register char *shellp, *shellname;
+	    extern char *strrchr();
+
+	    shellp = getenv("SHELL");
+	    if (shellp == NULL)
+		shellp = "/bin/sh";
+	    if ((shellname = strrchr(shellp, '/')) == 0)
+		shellname = shellp;
+	    else
+		shellname++;
+	    if (argc > 1)
+		execl(shellp, shellname, "-c", &saveline[1], 0);
+	    else
+		execl(shellp, shellname, 0);
+	    perror("Execl");
+	    _exit(1);
+	}
+    default:
+	    (void)wait((int *)0);	/* Wait for the shell to complete */
+
+	    if (TerminalWindowSize(&newrows, &newcols) && connected &&
+		(err || ((oldrows != newrows) || (oldcols != newcols)))) {
+		    sendnaws();
+	    }
+	    break;
+    }
+    return 1;
+}
+#else	/* !defined(TN3270) */
+extern int shell();
+#endif	/* !defined(TN3270) */
+
+    /*VARARGS*/
+    static
+bye(argc, argv)
+    int  argc;		/* Number of arguments */
+    char *argv[];	/* arguments */
+{
+    extern int resettermname;
+
+    if (connected) {
+	(void) shutdown(net, 2);
+	printf("Connection closed.\n");
+	(void) NetClose(net);
+	connected = 0;
+	resettermname = 1;
+#if	defined(AUTHENTICATION) || defined(ENCRYPTION)
+	auth_encrypt_connect(connected);
+#endif	/* defined(AUTHENTICATION) || defined(ENCRYPTION) */
+	/* reset options */
+	tninit();
+#if	defined(TN3270)
+	SetIn3270();		/* Get out of 3270 mode */
+#endif	/* defined(TN3270) */
+    }
+    if ((argc != 2) || (strcmp(argv[1], "fromquit") != 0)) {
+	longjmp(toplevel, 1);
+	/* NOTREACHED */
+    }
+    return 1;			/* Keep lint, etc., happy */
+}
+
+/*VARARGS*/
+quit()
+{
+	(void) call(bye, "bye", "fromquit", 0);
+	Exit(0);
+	/*NOTREACHED*/
+}
+
+/*VARARGS*/
+	int
+logout()
+{
+	send_do(TELOPT_LOGOUT, 1);
+	(void) netflush();
+	return 1;
+}
+
+
+/*
+ * The SLC command.
+ */
+
+struct slclist {
+	char	*name;
+	char	*help;
+	void	(*handler)();
+	int	arg;
+};
+
+static void slc_help();
+
+struct slclist SlcList[] = {
+    { "export",	"Use local special character definitions",
+						slc_mode_export,	0 },
+    { "import",	"Use remote special character definitions",
+						slc_mode_import,	1 },
+    { "check",	"Verify remote special character definitions",
+						slc_mode_import,	0 },
+    { "help",	0,				slc_help,		0 },
+    { "?",	"Print help information",	slc_help,		0 },
+    { 0 },
+};
+
+    static void
+slc_help()
+{
+    struct slclist *c;
+
+    for (c = SlcList; c->name; c++) {
+	if (c->help) {
+	    if (*c->help)
+		printf("%-15s %s\n", c->name, c->help);
+	    else
+		printf("\n");
+	}
+    }
+}
+
+    static struct slclist *
+getslc(name)
+    char *name;
+{
+    return (struct slclist *)
+		genget(name, (char **) SlcList, sizeof(struct slclist));
+}
+
+    static
+slccmd(argc, argv)
+    int  argc;
+    char *argv[];
+{
+    struct slclist *c;
+
+    if (argc != 2) {
+	fprintf(stderr,
+	    "Need an argument to 'slc' command.  'slc ?' for help.\n");
+	return 0;
+    }
+    c = getslc(argv[1]);
+    if (c == 0) {
+	fprintf(stderr, "'%s': unknown argument ('slc ?' for help).\n",
+    				argv[1]);
+	return 0;
+    }
+    if (Ambiguous(c)) {
+	fprintf(stderr, "'%s': ambiguous argument ('slc ?' for help).\n",
+    				argv[1]);
+	return 0;
+    }
+    (*c->handler)(c->arg);
+    slcstate();
+    return 1;
+}
+
+/*
+ * The ENVIRON command.
+ */
+
+struct envlist {
+	char	*name;
+	char	*help;
+	void	(*handler)();
+	int	narg;
+};
+
+extern struct env_lst *
+	env_define P((unsigned char *, unsigned char *));
+extern void
+	env_undefine P((unsigned char *)),
+	env_export P((unsigned char *)),
+	env_unexport P((unsigned char *)),
+	env_send P((unsigned char *)),
+#if defined(OLD_ENVIRON) && defined(ENV_HACK)
+	env_varval P((unsigned char *)),
+#endif
+	env_list P((void));
+static void
+	env_help P((void));
+
+struct envlist EnvList[] = {
+    { "define",	"Define an environment variable",
+						(void (*)())env_define,	2 },
+    { "undefine", "Undefine an environment variable",
+						env_undefine,	1 },
+    { "export",	"Mark an environment variable for automatic export",
+						env_export,	1 },
+    { "unexport", "Don't mark an environment variable for automatic export",
+						env_unexport,	1 },
+    { "send",	"Send an environment variable", env_send,	1 },
+    { "list",	"List the current environment variables",
+						env_list,	0 },
+#if defined(OLD_ENVIRON) && defined(ENV_HACK)
+    { "varval", "Reverse VAR and VALUE (auto, right, wrong, status)",
+						env_varval,    1 },
+#endif
+    { "help",	0,				env_help,		0 },
+    { "?",	"Print help information",	env_help,		0 },
+    { 0 },
+};
+
+    static void
+env_help()
+{
+    struct envlist *c;
+
+    for (c = EnvList; c->name; c++) {
+	if (c->help) {
+	    if (*c->help)
+		printf("%-15s %s\n", c->name, c->help);
+	    else
+		printf("\n");
+	}
+    }
+}
+
+    static struct envlist *
+getenvcmd(name)
+    char *name;
+{
+    return (struct envlist *)
+		genget(name, (char **) EnvList, sizeof(struct envlist));
+}
+
+env_cmd(argc, argv)
+    int  argc;
+    char *argv[];
+{
+    struct envlist *c;
+
+    if (argc < 2) {
+	fprintf(stderr,
+	    "Need an argument to 'environ' command.  'environ ?' for help.\n");
+	return 0;
+    }
+    c = getenvcmd(argv[1]);
+    if (c == 0) {
+	fprintf(stderr, "'%s': unknown argument ('environ ?' for help).\n",
+    				argv[1]);
+	return 0;
+    }
+    if (Ambiguous(c)) {
+	fprintf(stderr, "'%s': ambiguous argument ('environ ?' for help).\n",
+    				argv[1]);
+	return 0;
+    }
+    if (c->narg + 2 != argc) {
+	fprintf(stderr,
+	    "Need %s%d argument%s to 'environ %s' command.  'environ ?' for help.\n",
+		c->narg < argc + 2 ? "only " : "",
+		c->narg, c->narg == 1 ? "" : "s", c->name);
+	return 0;
+    }
+    (*c->handler)(argv[2], argv[3]);
+    return 1;
+}
+
+struct env_lst {
+	struct env_lst *next;	/* pointer to next structure */
+	struct env_lst *prev;	/* pointer to previous structure */
+	unsigned char *var;	/* pointer to variable name */
+	unsigned char *value;	/* pointer to variable value */
+	int export;		/* 1 -> export with default list of variables */
+	int welldefined;	/* A well defined variable */
+};
+
+struct env_lst envlisthead;
+
+	struct env_lst *
+env_find(var)
+	unsigned char *var;
+{
+	register struct env_lst *ep;
+
+	for (ep = envlisthead.next; ep; ep = ep->next) {
+		if (strcmp((char *)ep->var, (char *)var) == 0)
+			return(ep);
+	}
+	return(NULL);
+}
+
+	void
+env_init()
+{
+	extern char **environ;
+	register char **epp, *cp;
+	register struct env_lst *ep;
+	extern char *strchr();
+
+	for (epp = environ; *epp; epp++) {
+		if (cp = strchr(*epp, '=')) {
+			*cp = '\0';
+			ep = env_define((unsigned char *)*epp,
+					(unsigned char *)cp+1);
+			ep->export = 0;
+			*cp = '=';
+		}
+	}
+	/*
+	 * Special case for DISPLAY variable.  If it is ":0.0" or
+	 * "unix:0.0", we have to get rid of "unix" and insert our
+	 * hostname.
+	 */
+	if ((ep = env_find("DISPLAY"))
+	    && ((*ep->value == ':')
+		|| (strncmp((char *)ep->value, "unix:", 5) == 0))) {
+		char hbuf[256+1];
+		char *cp2 = strchr((char *)ep->value, ':');
+
+		gethostname(hbuf, 256);
+		hbuf[256] = '\0';
+		cp = (char *)malloc(strlen(hbuf) + strlen(cp2) + 1);
+		sprintf((char *)cp, "%s%s", hbuf, cp2);
+		free(ep->value);
+		ep->value = (unsigned char *)cp;
+	}
+	/*
+	 * If USER is not defined, but LOGNAME is, then add
+	 * USER with the value from LOGNAME.  By default, we
+	 * don't export the USER variable.
+	 */
+	if ((env_find("USER") == NULL) && (ep = env_find("LOGNAME"))) {
+		env_define((unsigned char *)"USER", ep->value);
+		env_unexport((unsigned char *)"USER");
+	}
+	env_export((unsigned char *)"DISPLAY");
+	env_export((unsigned char *)"PRINTER");
+}
+
+	struct env_lst *
+env_define(var, value)
+	unsigned char *var, *value;
+{
+	register struct env_lst *ep;
+
+	if (ep = env_find(var)) {
+		if (ep->var)
+			free(ep->var);
+		if (ep->value)
+			free(ep->value);
+	} else {
+		ep = (struct env_lst *)malloc(sizeof(struct env_lst));
+		ep->next = envlisthead.next;
+		envlisthead.next = ep;
+		ep->prev = &envlisthead;
+		if (ep->next)
+			ep->next->prev = ep;
+	}
+	ep->welldefined = opt_welldefined(var);
+	ep->export = 1;
+	ep->var = (unsigned char *)strdup((char *)var);
+	ep->value = (unsigned char *)strdup((char *)value);
+	return(ep);
+}
+
+	void
+env_undefine(var)
+	unsigned char *var;
+{
+	register struct env_lst *ep;
+
+	if (ep = env_find(var)) {
+		ep->prev->next = ep->next;
+		if (ep->next)
+			ep->next->prev = ep->prev;
+		if (ep->var)
+			free(ep->var);
+		if (ep->value)
+			free(ep->value);
+		free(ep);
+	}
+}
+
+	void
+env_export(var)
+	unsigned char *var;
+{
+	register struct env_lst *ep;
+
+	if (ep = env_find(var))
+		ep->export = 1;
+}
+
+	void
+env_unexport(var)
+	unsigned char *var;
+{
+	register struct env_lst *ep;
+
+	if (ep = env_find(var))
+		ep->export = 0;
+}
+
+	void
+env_send(var)
+	unsigned char *var;
+{
+	register struct env_lst *ep;
+
+	if (my_state_is_wont(TELOPT_NEW_ENVIRON)
+#ifdef	OLD_ENVIRON
+	    && my_state_is_wont(TELOPT_OLD_ENVIRON)
+#endif
+		) {
+		fprintf(stderr,
+		    "Cannot send '%s': Telnet ENVIRON option not enabled\n",
+									var);
+		return;
+	}
+	ep = env_find(var);
+	if (ep == 0) {
+		fprintf(stderr, "Cannot send '%s': variable not defined\n",
+									var);
+		return;
+	}
+	env_opt_start_info();
+	env_opt_add(ep->var);
+	env_opt_end(0);
+}
+
+	void
+env_list()
+{
+	register struct env_lst *ep;
+
+	for (ep = envlisthead.next; ep; ep = ep->next) {
+		printf("%c %-20s %s\n", ep->export ? '*' : ' ',
+					ep->var, ep->value);
+	}
+}
+
+	unsigned char *
+env_default(init, welldefined)
+	int init;
+{
+	static struct env_lst *nep = NULL;
+
+	if (init) {
+		nep = &envlisthead;
+		return;
+	}
+	if (nep) {
+		while (nep = nep->next) {
+			if (nep->export && (nep->welldefined == welldefined))
+				return(nep->var);
+		}
+	}
+	return(NULL);
+}
+
+	unsigned char *
+env_getvalue(var)
+	unsigned char *var;
+{
+	register struct env_lst *ep;
+
+	if (ep = env_find(var))
+		return(ep->value);
+	return(NULL);
+}
+
+#if defined(OLD_ENVIRON) && defined(ENV_HACK)
+	void
+env_varval(what)
+	unsigned char *what;
+{
+	extern int old_env_var, old_env_value, env_auto;
+	int len = strlen((char *)what);
+
+	if (len == 0)
+		goto unknown;
+
+	if (strncasecmp((char *)what, "status", len) == 0) {
+		if (env_auto)
+			printf("%s%s", "VAR and VALUE are/will be ",
+					"determined automatically\n");
+		if (old_env_var == OLD_ENV_VAR)
+			printf("VAR and VALUE set to correct definitions\n");
+		else
+			printf("VAR and VALUE definitions are reversed\n");
+	} else if (strncasecmp((char *)what, "auto", len) == 0) {
+		env_auto = 1;
+		old_env_var = OLD_ENV_VALUE;
+		old_env_value = OLD_ENV_VAR;
+	} else if (strncasecmp((char *)what, "right", len) == 0) {
+		env_auto = 0;
+		old_env_var = OLD_ENV_VAR;
+		old_env_value = OLD_ENV_VALUE;
+	} else if (strncasecmp((char *)what, "wrong", len) == 0) {
+		env_auto = 0;
+		old_env_var = OLD_ENV_VALUE;
+		old_env_value = OLD_ENV_VAR;
+	} else {
+unknown:
+		printf("Unknown \"varval\" command. (\"auto\", \"right\", \"wrong\", \"status\")\n");
+	}
+}
+#endif
+
+#if	defined(AUTHENTICATION)
+/*
+ * The AUTHENTICATE command.
+ */
+
+struct authlist {
+	char	*name;
+	char	*help;
+	int	(*handler)();
+	int	narg;
+};
+
+extern int
+	auth_enable P((char *)),
+	auth_disable P((char *)),
+	auth_status P((void));
+static int
+	auth_help P((void));
+
+struct authlist AuthList[] = {
+    { "status",	"Display current status of authentication information",
+						auth_status,	0 },
+    { "disable", "Disable an authentication type ('auth disable ?' for more)",
+						auth_disable,	1 },
+    { "enable", "Enable an authentication type ('auth enable ?' for more)",
+						auth_enable,	1 },
+    { "help",	0,				auth_help,		0 },
+    { "?",	"Print help information",	auth_help,		0 },
+    { 0 },
+};
+
+    static int
+auth_help()
+{
+    struct authlist *c;
+
+    for (c = AuthList; c->name; c++) {
+	if (c->help) {
+	    if (*c->help)
+		printf("%-15s %s\n", c->name, c->help);
+	    else
+		printf("\n");
+	}
+    }
+    return 0;
+}
+
+auth_cmd(argc, argv)
+    int  argc;
+    char *argv[];
+{
+    struct authlist *c;
+
+    if (argc < 2) {
+	fprintf(stderr,
+	    "Need an argument to 'auth' command.  'auth ?' for help.\n");
+	return 0;
+    }
+
+    c = (struct authlist *)
+		genget(argv[1], (char **) AuthList, sizeof(struct authlist));
+    if (c == 0) {
+	fprintf(stderr, "'%s': unknown argument ('auth ?' for help).\n",
+    				argv[1]);
+	return 0;
+    }
+    if (Ambiguous(c)) {
+	fprintf(stderr, "'%s': ambiguous argument ('auth ?' for help).\n",
+    				argv[1]);
+	return 0;
+    }
+    if (c->narg + 2 != argc) {
+	fprintf(stderr,
+	    "Need %s%d argument%s to 'auth %s' command.  'auth ?' for help.\n",
+		c->narg < argc + 2 ? "only " : "",
+		c->narg, c->narg == 1 ? "" : "s", c->name);
+	return 0;
+    }
+    return((*c->handler)(argv[2], argv[3]));
+}
+#endif
+
+#ifdef	ENCRYPTION
+/*
+ * The ENCRYPT command.
+ */
+
+struct encryptlist {
+	char	*name;
+	char	*help;
+	int	(*handler)();
+	int	needconnect;
+	int	minarg;
+	int	maxarg;
+};
+
+extern int
+	EncryptEnable P((char *, char *)),
+	EncryptDisable P((char *, char *)),
+	EncryptType P((char *, char *)),
+	EncryptStart P((char *)),
+	EncryptStartInput P((void)),
+	EncryptStartOutput P((void)),
+	EncryptStop P((char *)),
+	EncryptStopInput P((void)),
+	EncryptStopOutput P((void)),
+	EncryptStatus P((void));
+static int
+	EncryptHelp P((void));
+
+struct encryptlist EncryptList[] = {
+    { "enable", "Enable encryption. ('encrypt enable ?' for more)",
+						EncryptEnable, 1, 1, 2 },
+    { "disable", "Disable encryption. ('encrypt enable ?' for more)",
+						EncryptDisable, 0, 1, 2 },
+    { "type", "Set encryption type. ('encrypt type ?' for more)",
+						EncryptType, 0, 1, 1 },
+    { "start", "Start encryption. ('encrypt start ?' for more)",
+						EncryptStart, 1, 0, 1 },
+    { "stop", "Stop encryption. ('encrypt stop ?' for more)",
+						EncryptStop, 1, 0, 1 },
+    { "input", "Start encrypting the input stream",
+						EncryptStartInput, 1, 0, 0 },
+    { "-input", "Stop encrypting the input stream",
+						EncryptStopInput, 1, 0, 0 },
+    { "output", "Start encrypting the output stream",
+						EncryptStartOutput, 1, 0, 0 },
+    { "-output", "Stop encrypting the output stream",
+						EncryptStopOutput, 1, 0, 0 },
+
+    { "status",	"Display current status of authentication information",
+						EncryptStatus,	0, 0, 0 },
+    { "help",	0,				EncryptHelp,	0, 0, 0 },
+    { "?",	"Print help information",	EncryptHelp,	0, 0, 0 },
+    { 0 },
+};
+
+    static int
+EncryptHelp()
+{
+    struct encryptlist *c;
+
+    for (c = EncryptList; c->name; c++) {
+	if (c->help) {
+	    if (*c->help)
+		printf("%-15s %s\n", c->name, c->help);
+	    else
+		printf("\n");
+	}
+    }
+    return 0;
+}
+
+encrypt_cmd(argc, argv)
+    int  argc;
+    char *argv[];
+{
+    struct encryptlist *c;
+
+    if (argc < 2) {
+	fprintf(stderr,
+	    "Need an argument to 'encrypt' command.  'encrypt ?' for help.\n");
+	return 0;
+    }
+
+    c = (struct encryptlist *)
+		genget(argv[1], (char **) EncryptList, sizeof(struct encryptlist));
+    if (c == 0) {
+	fprintf(stderr, "'%s': unknown argument ('encrypt ?' for help).\n",
+    				argv[1]);
+	return 0;
+    }
+    if (Ambiguous(c)) {
+	fprintf(stderr, "'%s': ambiguous argument ('encrypt ?' for help).\n",
+    				argv[1]);
+	return 0;
+    }
+    argc -= 2;
+    if (argc < c->minarg || argc > c->maxarg) {
+	if (c->minarg == c->maxarg) {
+	    fprintf(stderr, "Need %s%d argument%s ",
+		c->minarg < argc ? "only " : "", c->minarg,
+		c->minarg == 1 ? "" : "s");
+	} else {
+	    fprintf(stderr, "Need %s%d-%d arguments ",
+		c->maxarg < argc ? "only " : "", c->minarg, c->maxarg);
+	}
+	fprintf(stderr, "to 'encrypt %s' command.  'encrypt ?' for help.\n",
+		c->name);
+	return 0;
+    }
+    if (c->needconnect && !connected) {
+	if (!(argc && (isprefix(argv[2], "help") || isprefix(argv[2], "?")))) {
+	    printf("?Need to be connected first.\n");
+	    return 0;
+	}
+    }
+    return ((*c->handler)(argc > 0 ? argv[2] : 0,
+			argc > 1 ? argv[3] : 0,
+			argc > 2 ? argv[4] : 0));
+}
+#endif	/* ENCRYPTION */
+
+#if	defined(unix) && defined(TN3270)
+    static void
+filestuff(fd)
+    int fd;
+{
+    int res;
+
+#ifdef	F_GETOWN
+    setconnmode(0);
+    res = fcntl(fd, F_GETOWN, 0);
+    setcommandmode();
+
+    if (res == -1) {
+	perror("fcntl");
+	return;
+    }
+    printf("\tOwner is %d.\n", res);
+#endif
+
+    setconnmode(0);
+    res = fcntl(fd, F_GETFL, 0);
+    setcommandmode();
+
+    if (res == -1) {
+	perror("fcntl");
+	return;
+    }
+#ifdef notdef
+    printf("\tFlags are 0x%x: %s\n", res, decodeflags(res));
+#endif
+}
+#endif /* defined(unix) && defined(TN3270) */
+
+/*
+ * Print status about the connection.
+ */
+    /*ARGSUSED*/
+    static
+status(argc, argv)
+    int	 argc;
+    char *argv[];
+{
+    if (connected) {
+	printf("Connected to %s.\n", hostname);
+	if ((argc < 2) || strcmp(argv[1], "notmuch")) {
+	    int mode = getconnmode();
+
+	    if (my_want_state_is_will(TELOPT_LINEMODE)) {
+		printf("Operating with LINEMODE option\n");
+		printf("%s line editing\n", (mode&MODE_EDIT) ? "Local" : "No");
+		printf("%s catching of signals\n",
+					(mode&MODE_TRAPSIG) ? "Local" : "No");
+		slcstate();
+#ifdef	KLUDGELINEMODE
+	    } else if (kludgelinemode && my_want_state_is_dont(TELOPT_SGA)) {
+		printf("Operating in obsolete linemode\n");
+#endif
+	    } else {
+		printf("Operating in single character mode\n");
+		if (localchars)
+		    printf("Catching signals locally\n");
+	    }
+	    printf("%s character echo\n", (mode&MODE_ECHO) ? "Local" : "Remote");
+	    if (my_want_state_is_will(TELOPT_LFLOW))
+		printf("%s flow control\n", (mode&MODE_FLOW) ? "Local" : "No");
+#ifdef	ENCRYPTION
+	    encrypt_display();
+#endif	/* ENCRYPTION */
+	}
+    } else {
+	printf("No connection.\n");
+    }
+#   if !defined(TN3270)
+    printf("Escape character is '%s'.\n", control(escape));
+    (void) fflush(stdout);
+#   else /* !defined(TN3270) */
+    if ((!In3270) && ((argc < 2) || strcmp(argv[1], "notmuch"))) {
+	printf("Escape character is '%s'.\n", control(escape));
+    }
+#   if defined(unix)
+    if ((argc >= 2) && !strcmp(argv[1], "everything")) {
+	printf("SIGIO received %d time%s.\n",
+				sigiocount, (sigiocount == 1)? "":"s");
+	if (In3270) {
+	    printf("Process ID %d, process group %d.\n",
+					    getpid(), getpgrp(getpid()));
+	    printf("Terminal input:\n");
+	    filestuff(tin);
+	    printf("Terminal output:\n");
+	    filestuff(tout);
+	    printf("Network socket:\n");
+	    filestuff(net);
+	}
+    }
+    if (In3270 && transcom) {
+       printf("Transparent mode command is '%s'.\n", transcom);
+    }
+#   endif /* defined(unix) */
+    (void) fflush(stdout);
+    if (In3270) {
+	return 0;
+    }
+#   endif /* defined(TN3270) */
+    return 1;
+}
+
+#ifdef	SIGINFO
+/*
+ * Function that gets called when SIGINFO is received.
+ */
+ayt_status()
+{
+    (void) call(status, "status", "notmuch", 0);
+}
+#endif
+
+unsigned long inet_addr();
+
+    int
+tn(argc, argv)
+    int argc;
+    char *argv[];
+{
+    register struct hostent *host = 0;
+    struct sockaddr_in sin;
+    struct servent *sp = 0;
+    unsigned long temp;
+    extern char *inet_ntoa();
+#if	defined(IP_OPTIONS) && defined(IPPROTO_IP)
+    char *srp = 0, *strrchr();
+    unsigned long sourceroute(), srlen;
+#endif
+    char *cmd, *hostp = 0, *portp = 0, *user = 0;
+
+    /* clear the socket address prior to use */
+    memset((char *)&sin, 0, sizeof(sin));
+
+    if (connected) {
+	printf("?Already connected to %s\n", hostname);
+	setuid(getuid());
+	return 0;
+    }
+    if (argc < 2) {
+	(void) strcpy(line, "open ");
+	printf("(to) ");
+	(void) fgets(&line[strlen(line)], sizeof(line) - strlen(line), stdin);
+	makeargv();
+	argc = margc;
+	argv = margv;
+    }
+    cmd = *argv;
+    --argc; ++argv;
+    while (argc) {
+	if (strcmp(*argv, "help") == 0 || isprefix(*argv, "?"))
+	    goto usage;
+	if (strcmp(*argv, "-l") == 0) {
+	    --argc; ++argv;
+	    if (argc == 0)
+		goto usage;
+	    user = *argv++;
+	    --argc;
+	    continue;
+	}
+	if (strcmp(*argv, "-a") == 0) {
+	    --argc; ++argv;
+	    autologin = 1;
+	    continue;
+	}
+	if (hostp == 0) {
+	    hostp = *argv++;
+	    --argc;
+	    continue;
+	}
+	if (portp == 0) {
+	    portp = *argv++;
+	    --argc;
+	    continue;
+	}
+    usage:
+	printf("usage: %s [-l user] [-a] host-name [port]\n", cmd);
+	setuid(getuid());
+	return 0;
+    }
+    if (hostp == 0)
+	goto usage;
+
+#if	defined(IP_OPTIONS) && defined(IPPROTO_IP)
+    if (hostp[0] == '@' || hostp[0] == '!') {
+	if ((hostname = strrchr(hostp, ':')) == NULL)
+	    hostname = strrchr(hostp, '@');
+	hostname++;
+	srp = 0;
+	temp = sourceroute(hostp, &srp, &srlen);
+	if (temp == 0) {
+	    herror(srp);
+	    setuid(getuid());
+	    return 0;
+	} else if (temp == -1) {
+	    printf("Bad source route option: %s\n", hostp);
+	    setuid(getuid());
+	    return 0;
+	} else {
+	    sin.sin_addr.s_addr = temp;
+	    sin.sin_family = AF_INET;
+	}
+    } else {
+#endif
+	temp = inet_addr(hostp);
+	if (temp != (unsigned long) -1) {
+	    sin.sin_addr.s_addr = temp;
+	    sin.sin_family = AF_INET;
+	    (void) strcpy(_hostname, hostp);
+	    hostname = _hostname;
+	} else {
+	    host = gethostbyname(hostp);
+	    if (host) {
+		sin.sin_family = host->h_addrtype;
+#if	defined(h_addr)		/* In 4.3, this is a #define */
+		memmove((caddr_t)&sin.sin_addr,
+				host->h_addr_list[0], host->h_length);
+#else	/* defined(h_addr) */
+		memmove((caddr_t)&sin.sin_addr, host->h_addr, host->h_length);
+#endif	/* defined(h_addr) */
+		strncpy(_hostname, host->h_name, sizeof(_hostname));
+		_hostname[sizeof(_hostname)-1] = '\0';
+		hostname = _hostname;
+	    } else {
+		herror(hostp);
+		setuid(getuid());
+		return 0;
+	    }
+	}
+#if	defined(IP_OPTIONS) && defined(IPPROTO_IP)
+    }
+#endif
+    if (portp) {
+	if (*portp == '-') {
+	    portp++;
+	    telnetport = 1;
+	} else
+	    telnetport = 0;
+	sin.sin_port = atoi(portp);
+	if (sin.sin_port == 0) {
+	    sp = getservbyname(portp, "tcp");
+	    if (sp)
+		sin.sin_port = sp->s_port;
+	    else {
+		printf("%s: bad port number\n", portp);
+		setuid(getuid());
+		return 0;
+	    }
+	} else {
+#if	!defined(htons)
+	    u_short htons P((unsigned short));
+#endif	/* !defined(htons) */
+	    sin.sin_port = htons(sin.sin_port);
+	}
+    } else {
+	if (sp == 0) {
+	    sp = getservbyname("telnet", "tcp");
+	    if (sp == 0) {
+		fprintf(stderr, "telnet: tcp/telnet: unknown service\n");
+		setuid(getuid());
+		return 0;
+	    }
+	    sin.sin_port = sp->s_port;
+	}
+	telnetport = 1;
+    }
+    printf("Trying %s...\n", inet_ntoa(sin.sin_addr));
+    do {
+	net = socket(AF_INET, SOCK_STREAM, 0);
+	setuid(getuid());
+	if (net < 0) {
+	    perror("telnet: socket");
+	    return 0;
+	}
+#if	defined(IP_OPTIONS) && defined(IPPROTO_IP)
+	if (srp && setsockopt(net, IPPROTO_IP, IP_OPTIONS, (char *)srp, srlen) < 0)
+		perror("setsockopt (IP_OPTIONS)");
+#endif
+#if	defined(IPPROTO_IP) && defined(IP_TOS)
+	{
+# if	defined(HAS_GETTOS)
+	    struct tosent *tp;
+	    if (tos < 0 && (tp = gettosbyname("telnet", "tcp")))
+		tos = tp->t_tos;
+# endif
+	    if (tos < 0)
+		tos = 020;	/* Low Delay bit */
+	    if (tos
+		&& (setsockopt(net, IPPROTO_IP, IP_TOS,
+		    (char *)&tos, sizeof(int)) < 0)
+		&& (errno != ENOPROTOOPT))
+		    perror("telnet: setsockopt (IP_TOS) (ignored)");
+	}
+#endif	/* defined(IPPROTO_IP) && defined(IP_TOS) */
+
+	if (debug && SetSockOpt(net, SOL_SOCKET, SO_DEBUG, 1) < 0) {
+		perror("setsockopt (SO_DEBUG)");
+	}
+
+	if (connect(net, (struct sockaddr *)&sin, sizeof (sin)) < 0) {
+#if	defined(h_addr)		/* In 4.3, this is a #define */
+	    if (host && host->h_addr_list[1]) {
+		int oerrno = errno;
+
+		fprintf(stderr, "telnet: connect to address %s: ",
+						inet_ntoa(sin.sin_addr));
+		errno = oerrno;
+		perror((char *)0);
+		host->h_addr_list++;
+		memmove((caddr_t)&sin.sin_addr,
+			host->h_addr_list[0], host->h_length);
+		(void) NetClose(net);
+		continue;
+	    }
+#endif	/* defined(h_addr) */
+	    perror("telnet: Unable to connect to remote host");
+	    return 0;
+	}
+	connected++;
+#if	defined(AUTHENTICATION) || defined(ENCRYPTION)
+	auth_encrypt_connect(connected);
+#endif	/* defined(AUTHENTICATION) || defined(ENCRYPTION) */
+    } while (connected == 0);
+    cmdrc(hostp, hostname);
+    if (autologin && user == NULL) {
+	struct passwd *pw;
+
+	user = getenv("USER");
+	if (user == NULL ||
+	    (pw = getpwnam(user)) && pw->pw_uid != getuid()) {
+		if (pw = getpwuid(getuid()))
+			user = pw->pw_name;
+		else
+			user = NULL;
+	}
+    }
+    if (user) {
+	env_define((unsigned char *)"USER", (unsigned char *)user);
+	env_export((unsigned char *)"USER");
+    }
+    (void) call(status, "status", "notmuch", 0);
+    if (setjmp(peerdied) == 0)
+	telnet(user);
+    (void) NetClose(net);
+    ExitString("Connection closed by foreign host.\n",1);
+    /*NOTREACHED*/
+}
+
+#define HELPINDENT (sizeof ("connect"))
+
+static char
+	openhelp[] =	"connect to a site",
+	closehelp[] =	"close current connection",
+	logouthelp[] =	"forcibly logout remote user and close the connection",
+	quithelp[] =	"exit telnet",
+	statushelp[] =	"print status information",
+	helphelp[] =	"print help information",
+	sendhelp[] =	"transmit special characters ('send ?' for more)",
+	sethelp[] = 	"set operating parameters ('set ?' for more)",
+	unsethelp[] = 	"unset operating parameters ('unset ?' for more)",
+	togglestring[] ="toggle operating parameters ('toggle ?' for more)",
+	slchelp[] =	"change state of special charaters ('slc ?' for more)",
+	displayhelp[] =	"display operating parameters",
+#if	defined(TN3270) && defined(unix)
+	transcomhelp[] = "specify Unix command for transparent mode pipe",
+#endif	/* defined(TN3270) && defined(unix) */
+#if	defined(AUTHENTICATION)
+	authhelp[] =	"turn on (off) authentication ('auth ?' for more)",
+#endif
+#ifdef	ENCRYPTION
+	encrypthelp[] =	"turn on (off) encryption ('encrypt ?' for more)",
+#endif	/* ENCRYPTION */
+#if	defined(unix)
+	zhelp[] =	"suspend telnet",
+#endif	/* defined(unix) */
+	shellhelp[] =	"invoke a subshell",
+	envhelp[] =	"change environment variables ('environ ?' for more)",
+	modestring[] = "try to enter line or character mode ('mode ?' for more)";
+
+static int	help();
+
+static Command cmdtab[] = {
+	{ "close",	closehelp,	bye,		1 },
+	{ "logout",	logouthelp,	logout,		1 },
+	{ "display",	displayhelp,	display,	0 },
+	{ "mode",	modestring,	modecmd,	0 },
+	{ "open",	openhelp,	tn,		0 },
+	{ "quit",	quithelp,	quit,		0 },
+	{ "send",	sendhelp,	sendcmd,	0 },
+	{ "set",	sethelp,	setcmd,		0 },
+	{ "unset",	unsethelp,	unsetcmd,	0 },
+	{ "status",	statushelp,	status,		0 },
+	{ "toggle",	togglestring,	toggle,		0 },
+	{ "slc",	slchelp,	slccmd,		0 },
+#if	defined(TN3270) && defined(unix)
+	{ "transcom",	transcomhelp,	settranscom,	0 },
+#endif	/* defined(TN3270) && defined(unix) */
+#if	defined(AUTHENTICATION)
+	{ "auth",	authhelp,	auth_cmd,	0 },
+#endif
+#ifdef	ENCRYPTION
+	{ "encrypt",	encrypthelp,	encrypt_cmd,	0 },
+#endif	/* ENCRYPTION */
+#if	defined(unix)
+	{ "z",		zhelp,		suspend,	0 },
+#endif	/* defined(unix) */
+#if	defined(TN3270)
+	{ "!",		shellhelp,	shell,		1 },
+#else
+	{ "!",		shellhelp,	shell,		0 },
+#endif
+	{ "environ",	envhelp,	env_cmd,	0 },
+	{ "?",		helphelp,	help,		0 },
+	0
+};
+
+static char	crmodhelp[] =	"deprecated command -- use 'toggle crmod' instead";
+static char	escapehelp[] =	"deprecated command -- use 'set escape' instead";
+
+static Command cmdtab2[] = {
+	{ "help",	0,		help,		0 },
+	{ "escape",	escapehelp,	setescape,	0 },
+	{ "crmod",	crmodhelp,	togcrmod,	0 },
+	0
+};
+
+
+/*
+ * Call routine with argc, argv set from args (terminated by 0).
+ */
+
+    /*VARARGS1*/
+    static
+call(va_alist)
+    va_dcl
+{
+    va_list ap;
+    typedef int (*intrtn_t)();
+    intrtn_t routine;
+    char *args[100];
+    int argno = 0;
+
+    va_start(ap);
+    routine = (va_arg(ap, intrtn_t));
+    while ((args[argno++] = va_arg(ap, char *)) != 0) {
+	;
+    }
+    va_end(ap);
+    return (*routine)(argno-1, args);
+}
+
+
+    static Command *
+getcmd(name)
+    char *name;
+{
+    Command *cm;
+
+    if (cm = (Command *) genget(name, (char **) cmdtab, sizeof(Command)))
+	return cm;
+    return (Command *) genget(name, (char **) cmdtab2, sizeof(Command));
+}
+
+    void
+command(top, tbuf, cnt)
+    int top;
+    char *tbuf;
+    int cnt;
+{
+    register Command *c;
+
+    setcommandmode();
+    if (!top) {
+	putchar('\n');
+#if	defined(unix)
+    } else {
+	(void) signal(SIGINT, SIG_DFL);
+	(void) signal(SIGQUIT, SIG_DFL);
+#endif	/* defined(unix) */
+    }
+    for (;;) {
+	if (rlogin == _POSIX_VDISABLE)
+		printf("%s> ", prompt);
+	if (tbuf) {
+	    register char *cp;
+	    cp = line;
+	    while (cnt > 0 && (*cp++ = *tbuf++) != '\n')
+		cnt--;
+	    tbuf = 0;
+	    if (cp == line || *--cp != '\n' || cp == line)
+		goto getline;
+	    *cp = '\0';
+	    if (rlogin == _POSIX_VDISABLE)
+		printf("%s\n", line);
+	} else {
+	getline:
+	    if (rlogin != _POSIX_VDISABLE)
+		printf("%s> ", prompt);
+	    if (fgets(line, sizeof(line), stdin) == NULL) {
+		if (feof(stdin) || ferror(stdin)) {
+		    (void) quit();
+		    /*NOTREACHED*/
+		}
+		break;
+	    }
+	}
+	if (line[0] == 0)
+	    break;
+	makeargv();
+	if (margv[0] == 0) {
+	    break;
+	}
+	c = getcmd(margv[0]);
+	if (Ambiguous(c)) {
+	    printf("?Ambiguous command\n");
+	    continue;
+	}
+	if (c == 0) {
+	    printf("?Invalid command\n");
+	    continue;
+	}
+	if (c->needconnect && !connected) {
+	    printf("?Need to be connected first.\n");
+	    continue;
+	}
+	if ((*c->handler)(margc, margv)) {
+	    break;
+	}
+    }
+    if (!top) {
+	if (!connected) {
+	    longjmp(toplevel, 1);
+	    /*NOTREACHED*/
+	}
+#if	defined(TN3270)
+	if (shell_active == 0) {
+	    setconnmode(0);
+	}
+#else	/* defined(TN3270) */
+	setconnmode(0);
+#endif	/* defined(TN3270) */
+    }
+}
+
+/*
+ * Help command.
+ */
+	static
+help(argc, argv)
+	int argc;
+	char *argv[];
+{
+	register Command *c;
+
+	if (argc == 1) {
+		printf("Commands may be abbreviated.  Commands are:\n\n");
+		for (c = cmdtab; c->name; c++)
+			if (c->help) {
+				printf("%-*s\t%s\n", HELPINDENT, c->name,
+								    c->help);
+			}
+		return 0;
+	}
+	while (--argc > 0) {
+		register char *arg;
+		arg = *++argv;
+		c = getcmd(arg);
+		if (Ambiguous(c))
+			printf("?Ambiguous help command %s\n", arg);
+		else if (c == (Command *)0)
+			printf("?Invalid help command %s\n", arg);
+		else
+			printf("%s\n", c->help);
+	}
+	return 0;
+}
+
+static char *rcname = 0;
+static char rcbuf[128];
+
+cmdrc(m1, m2)
+	char *m1, *m2;
+{
+    register Command *c;
+    FILE *rcfile;
+    int gotmachine = 0;
+    int l1 = strlen(m1);
+    int l2 = strlen(m2);
+    char m1save[64];
+
+    if (skiprc)
+	return;
+
+    strcpy(m1save, m1);
+    m1 = m1save;
+
+    if (rcname == 0) {
+	rcname = getenv("HOME");
+	if (rcname)
+	    strcpy(rcbuf, rcname);
+	else
+	    rcbuf[0] = '\0';
+	strcat(rcbuf, "/.telnetrc");
+	rcname = rcbuf;
+    }
+
+    if ((rcfile = fopen(rcname, "r")) == 0) {
+	return;
+    }
+
+    for (;;) {
+	if (fgets(line, sizeof(line), rcfile) == NULL)
+	    break;
+	if (line[0] == 0)
+	    break;
+	if (line[0] == '#')
+	    continue;
+	if (gotmachine) {
+	    if (!isspace(line[0]))
+		gotmachine = 0;
+	}
+	if (gotmachine == 0) {
+	    if (isspace(line[0]))
+		continue;
+	    if (strncasecmp(line, m1, l1) == 0)
+		strncpy(line, &line[l1], sizeof(line) - l1);
+	    else if (strncasecmp(line, m2, l2) == 0)
+		strncpy(line, &line[l2], sizeof(line) - l2);
+	    else if (strncasecmp(line, "DEFAULT", 7) == 0)
+		strncpy(line, &line[7], sizeof(line) - 7);
+	    else
+		continue;
+	    if (line[0] != ' ' && line[0] != '\t' && line[0] != '\n')
+		continue;
+	    gotmachine = 1;
+	}
+	makeargv();
+	if (margv[0] == 0)
+	    continue;
+	c = getcmd(margv[0]);
+	if (Ambiguous(c)) {
+	    printf("?Ambiguous command: %s\n", margv[0]);
+	    continue;
+	}
+	if (c == 0) {
+	    printf("?Invalid command: %s\n", margv[0]);
+	    continue;
+	}
+	/*
+	 * This should never happen...
+	 */
+	if (c->needconnect && !connected) {
+	    printf("?Need to be connected first for %s.\n", margv[0]);
+	    continue;
+	}
+	(*c->handler)(margc, margv);
+    }
+    fclose(rcfile);
+}
+
+#if	defined(IP_OPTIONS) && defined(IPPROTO_IP)
+
+/*
+ * Source route is handed in as
+ *	[!]@hop1@hop2...[@|:]dst
+ * If the leading ! is present, it is a
+ * strict source route, otherwise it is
+ * assmed to be a loose source route.
+ *
+ * We fill in the source route option as
+ *	hop1,hop2,hop3...dest
+ * and return a pointer to hop1, which will
+ * be the address to connect() to.
+ *
+ * Arguments:
+ *	arg:	pointer to route list to decipher
+ *
+ *	cpp: 	If *cpp is not equal to NULL, this is a
+ *		pointer to a pointer to a character array
+ *		that should be filled in with the option.
+ *
+ *	lenp:	pointer to an integer that contains the
+ *		length of *cpp if *cpp != NULL.
+ *
+ * Return values:
+ *
+ *	Returns the address of the host to connect to.  If the
+ *	return value is -1, there was a syntax error in the
+ *	option, either unknown characters, or too many hosts.
+ *	If the return value is 0, one of the hostnames in the
+ *	path is unknown, and *cpp is set to point to the bad
+ *	hostname.
+ *
+ *	*cpp:	If *cpp was equal to NULL, it will be filled
+ *		in with a pointer to our static area that has
+ *		the option filled in.  This will be 32bit aligned.
+ *
+ *	*lenp:	This will be filled in with how long the option
+ *		pointed to by *cpp is.
+ *
+ */
+	unsigned long
+sourceroute(arg, cpp, lenp)
+	char	*arg;
+	char	**cpp;
+	int	*lenp;
+{
+	static char lsr[44];
+#ifdef	sysV88
+	static IOPTN ipopt;
+#endif
+	char *cp, *cp2, *lsrp, *lsrep;
+	register int tmp;
+	struct in_addr sin_addr;
+	register struct hostent *host = 0;
+	register char c;
+
+	/*
+	 * Verify the arguments, and make sure we have
+	 * at least 7 bytes for the option.
+	 */
+	if (cpp == NULL || lenp == NULL)
+		return((unsigned long)-1);
+	if (*cpp != NULL && *lenp < 7)
+		return((unsigned long)-1);
+	/*
+	 * Decide whether we have a buffer passed to us,
+	 * or if we need to use our own static buffer.
+	 */
+	if (*cpp) {
+		lsrp = *cpp;
+		lsrep = lsrp + *lenp;
+	} else {
+		*cpp = lsrp = lsr;
+		lsrep = lsrp + 44;
+	}
+
+	cp = arg;
+
+	/*
+	 * Next, decide whether we have a loose source
+	 * route or a strict source route, and fill in
+	 * the begining of the option.
+	 */
+#ifndef	sysV88
+	if (*cp == '!') {
+		cp++;
+		*lsrp++ = IPOPT_SSRR;
+	} else
+		*lsrp++ = IPOPT_LSRR;
+#else
+	if (*cp == '!') {
+		cp++;
+		ipopt.io_type = IPOPT_SSRR;
+	} else
+		ipopt.io_type = IPOPT_LSRR;
+#endif
+
+	if (*cp != '@')
+		return((unsigned long)-1);
+
+#ifndef	sysV88
+	lsrp++;		/* skip over length, we'll fill it in later */
+	*lsrp++ = 4;
+#endif
+
+	cp++;
+
+	sin_addr.s_addr = 0;
+
+	for (c = 0;;) {
+		if (c == ':')
+			cp2 = 0;
+		else for (cp2 = cp; c = *cp2; cp2++) {
+			if (c == ',') {
+				*cp2++ = '\0';
+				if (*cp2 == '@')
+					cp2++;
+			} else if (c == '@') {
+				*cp2++ = '\0';
+			} else if (c == ':') {
+				*cp2++ = '\0';
+			} else
+				continue;
+			break;
+		}
+		if (!c)
+			cp2 = 0;
+
+		if ((tmp = inet_addr(cp)) != -1) {
+			sin_addr.s_addr = tmp;
+		} else if (host = gethostbyname(cp)) {
+#if	defined(h_addr)
+			memmove((caddr_t)&sin_addr,
+				host->h_addr_list[0], host->h_length);
+#else
+			memmove((caddr_t)&sin_addr, host->h_addr, host->h_length);
+#endif
+		} else {
+			*cpp = cp;
+			return(0);
+		}
+		memmove(lsrp, (char *)&sin_addr, 4);
+		lsrp += 4;
+		if (cp2)
+			cp = cp2;
+		else
+			break;
+		/*
+		 * Check to make sure there is space for next address
+		 */
+		if (lsrp + 4 > lsrep)
+			return((unsigned long)-1);
+	}
+#ifndef	sysV88
+	if ((*(*cpp+IPOPT_OLEN) = lsrp - *cpp) <= 7) {
+		*cpp = 0;
+		*lenp = 0;
+		return((unsigned long)-1);
+	}
+	*lsrp++ = IPOPT_NOP; /* 32 bit word align it */
+	*lenp = lsrp - *cpp;
+#else
+	ipopt.io_len = lsrp - *cpp;
+	if (ipopt.io_len <= 5) {		/* Is 3 better ? */
+		*cpp = 0;
+		*lenp = 0;
+		return((unsigned long)-1);
+	}
+	*lenp = sizeof(ipopt);
+	*cpp = (char *) &ipopt;
+#endif
+	return(sin_addr.s_addr);
+}
+#endif
diff --git a/contrib/telnet/telnet/defines.h b/contrib/telnet/telnet/defines.h
new file mode 100644
index 0000000..0978173
--- /dev/null
+++ b/contrib/telnet/telnet/defines.h
@@ -0,0 +1,61 @@
+/*
+ * Copyright (c) 1988, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *	@(#)defines.h	8.1 (Berkeley) 6/6/93
+ */
+
+#define	settimer(x)	clocks.x = clocks.system++
+
+#if	!defined(TN3270)
+
+#define	SetIn3270()
+
+#endif	/* !defined(TN3270) */
+
+#define	NETADD(c)	{ *netoring.supply = c; ring_supplied(&netoring, 1); }
+#define	NET2ADD(c1,c2)	{ NETADD(c1); NETADD(c2); }
+#define	NETBYTES()	(ring_full_count(&netoring))
+#define	NETROOM()	(ring_empty_count(&netoring))
+
+#define	TTYADD(c)	if (!(SYNCHing||flushout)) { \
+				*ttyoring.supply = c; \
+				ring_supplied(&ttyoring, 1); \
+			}
+#define	TTYBYTES()	(ring_full_count(&ttyoring))
+#define	TTYROOM()	(ring_empty_count(&ttyoring))
+
+/*	Various modes */
+#define	MODE_LOCAL_CHARS(m)	((m)&(MODE_EDIT|MODE_TRAPSIG))
+#define	MODE_LOCAL_ECHO(m)	((m)&MODE_ECHO)
+#define	MODE_COMMAND_LINE(m)	((m)==-1)
+
+#define	CONTROL(x)	((x)&0x1f)		/* CTRL(x) is not portable */
diff --git a/contrib/telnet/telnet/externs.h b/contrib/telnet/telnet/externs.h
new file mode 100644
index 0000000..83ba07b
--- /dev/null
+++ b/contrib/telnet/telnet/externs.h
@@ -0,0 +1,482 @@
+/*
+ * Copyright (c) 1988, 1990, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *	@(#)externs.h	8.3 (Berkeley) 5/30/95
+ */
+
+#ifndef	BSD
+# define BSD 43
+#endif
+
+/*
+ * ucb stdio.h defines BSD as something wierd
+ */
+#if defined(sun) && defined(__svr4__)
+#define BSD 43
+#endif
+
+#ifndef	USE_TERMIO
+# if BSD > 43 || defined(SYSV_TERMIO)
+#  define USE_TERMIO
+# endif
+#endif
+
+#include <stdio.h>
+#include <setjmp.h>
+#if defined(CRAY) && !defined(NO_BSD_SETJMP)
+#include <bsdsetjmp.h>
+#endif
+#ifndef	FILIO_H
+#include <sys/ioctl.h>
+#else
+#include <sys/filio.h>
+#endif
+#ifdef CRAY
+# include <errno.h>
+#endif /* CRAY */
+#ifdef	USE_TERMIO
+# ifndef	VINTR
+#  ifdef SYSV_TERMIO
+#   include <sys/termio.h>
+#  else
+#   include <sys/termios.h>
+#   define termio termios
+#  endif
+# endif
+#endif
+#if defined(NO_CC_T) || !defined(USE_TERMIO)
+# if !defined(USE_TERMIO)
+typedef char cc_t;
+# else
+typedef unsigned char cc_t;
+# endif
+#endif
+
+#ifndef	NO_STRING_H
+#include <string.h>
+#else
+#include <strings.h>
+#endif
+
+#ifndef	_POSIX_VDISABLE
+# ifdef sun
+#  include <sys/param.h>	/* pick up VDISABLE definition, mayby */
+# endif
+# ifdef VDISABLE
+#  define _POSIX_VDISABLE VDISABLE
+# else
+#  define _POSIX_VDISABLE ((cc_t)'\377')
+# endif
+#endif
+
+#define	SUBBUFSIZE	256
+
+#ifndef CRAY
+extern int errno;		/* outside this world */
+#endif /* !CRAY */
+
+#if	!defined(P)
+# ifdef	__STDC__
+#  define	P(x)	x
+# else
+#  define	P(x)	()
+# endif
+#endif
+
+extern int
+    autologin,		/* Autologin enabled */
+    skiprc,		/* Don't process the ~/.telnetrc file */
+    eight,		/* use eight bit mode (binary in and/or out */
+    flushout,		/* flush output */
+    connected,		/* Are we connected to the other side? */
+    globalmode,		/* Mode tty should be in */
+    In3270,		/* Are we in 3270 mode? */
+    telnetport,		/* Are we connected to the telnet port? */
+    localflow,		/* Flow control handled locally */
+    restartany,		/* If flow control, restart output on any character */
+    localchars,		/* we recognize interrupt/quit */
+    donelclchars,	/* the user has set "localchars" */
+    showoptions,
+    net,		/* Network file descriptor */
+    tin,		/* Terminal input file descriptor */
+    tout,		/* Terminal output file descriptor */
+    crlf,		/* Should '\r' be mapped to <CR><LF> (or <CR><NUL>)? */
+    autoflush,		/* flush output when interrupting? */
+    autosynch,		/* send interrupt characters with SYNCH? */
+    SYNCHing,		/* Is the stream in telnet SYNCH mode? */
+    donebinarytoggle,	/* the user has put us in binary */
+    dontlecho,		/* do we suppress local echoing right now? */
+    crmod,
+    netdata,		/* Print out network data flow */
+    prettydump,		/* Print "netdata" output in user readable format */
+#if	defined(unix)
+#if	defined(TN3270)
+    cursesdata,		/* Print out curses data flow */
+    apitrace,		/* Trace API transactions */
+#endif	/* defined(TN3270) */
+    termdata,		/* Print out terminal data flow */
+#endif	/* defined(unix) */
+    debug;		/* Debug level */
+
+extern cc_t escape;	/* Escape to command mode */
+extern cc_t rlogin;	/* Rlogin mode escape character */
+#ifdef	KLUDGELINEMODE
+extern cc_t echoc;	/* Toggle local echoing */
+#endif
+
+extern char
+    *prompt;		/* Prompt for command. */
+
+extern char
+    doopt[],
+    dont[],
+    will[],
+    wont[],
+    options[],		/* All the little options */
+    *hostname;		/* Who are we connected to? */
+#ifdef	ENCRYPTION
+extern void (*encrypt_output) P((unsigned char *, int));
+extern int (*decrypt_input) P((int));
+#endif	/* ENCRYPTION */
+
+/*
+ * We keep track of each side of the option negotiation.
+ */
+
+#define	MY_STATE_WILL		0x01
+#define	MY_WANT_STATE_WILL	0x02
+#define	MY_STATE_DO		0x04
+#define	MY_WANT_STATE_DO	0x08
+
+/*
+ * Macros to check the current state of things
+ */
+
+#define	my_state_is_do(opt)		(options[opt]&MY_STATE_DO)
+#define	my_state_is_will(opt)		(options[opt]&MY_STATE_WILL)
+#define my_want_state_is_do(opt)	(options[opt]&MY_WANT_STATE_DO)
+#define my_want_state_is_will(opt)	(options[opt]&MY_WANT_STATE_WILL)
+
+#define	my_state_is_dont(opt)		(!my_state_is_do(opt))
+#define	my_state_is_wont(opt)		(!my_state_is_will(opt))
+#define my_want_state_is_dont(opt)	(!my_want_state_is_do(opt))
+#define my_want_state_is_wont(opt)	(!my_want_state_is_will(opt))
+
+#define	set_my_state_do(opt)		{options[opt] |= MY_STATE_DO;}
+#define	set_my_state_will(opt)		{options[opt] |= MY_STATE_WILL;}
+#define	set_my_want_state_do(opt)	{options[opt] |= MY_WANT_STATE_DO;}
+#define	set_my_want_state_will(opt)	{options[opt] |= MY_WANT_STATE_WILL;}
+
+#define	set_my_state_dont(opt)		{options[opt] &= ~MY_STATE_DO;}
+#define	set_my_state_wont(opt)		{options[opt] &= ~MY_STATE_WILL;}
+#define	set_my_want_state_dont(opt)	{options[opt] &= ~MY_WANT_STATE_DO;}
+#define	set_my_want_state_wont(opt)	{options[opt] &= ~MY_WANT_STATE_WILL;}
+
+/*
+ * Make everything symetrical
+ */
+
+#define	HIS_STATE_WILL			MY_STATE_DO
+#define	HIS_WANT_STATE_WILL		MY_WANT_STATE_DO
+#define HIS_STATE_DO			MY_STATE_WILL
+#define HIS_WANT_STATE_DO		MY_WANT_STATE_WILL
+
+#define	his_state_is_do			my_state_is_will
+#define	his_state_is_will		my_state_is_do
+#define his_want_state_is_do		my_want_state_is_will
+#define his_want_state_is_will		my_want_state_is_do
+
+#define	his_state_is_dont		my_state_is_wont
+#define	his_state_is_wont		my_state_is_dont
+#define his_want_state_is_dont		my_want_state_is_wont
+#define his_want_state_is_wont		my_want_state_is_dont
+
+#define	set_his_state_do		set_my_state_will
+#define	set_his_state_will		set_my_state_do
+#define	set_his_want_state_do		set_my_want_state_will
+#define	set_his_want_state_will		set_my_want_state_do
+
+#define	set_his_state_dont		set_my_state_wont
+#define	set_his_state_wont		set_my_state_dont
+#define	set_his_want_state_dont		set_my_want_state_wont
+#define	set_his_want_state_wont		set_my_want_state_dont
+
+
+extern FILE
+    *NetTrace;		/* Where debugging output goes */
+extern unsigned char
+    NetTraceFile[];	/* Name of file where debugging output goes */
+extern void
+    SetNetTrace P((char *));	/* Function to change where debugging goes */
+
+extern jmp_buf
+    peerdied,
+    toplevel;		/* For error conditions. */
+
+extern void
+    command P((int, char *, int)),
+    Dump P((int, unsigned char *, int)),
+    init_3270 P((void)),
+    printoption P((char *, int, int)),
+    printsub P((int, unsigned char *, int)),
+    sendnaws P((void)),
+    setconnmode P((int)),
+    setcommandmode P((void)),
+    setneturg P((void)),
+    sys_telnet_init P((void)),
+    telnet P((char *)),
+    tel_enter_binary P((int)),
+    TerminalFlushOutput P((void)),
+    TerminalNewMode P((int)),
+    TerminalRestoreState P((void)),
+    TerminalSaveState P((void)),
+    tninit P((void)),
+    upcase P((char *)),
+    willoption P((int)),
+    wontoption P((int));
+
+extern void
+    send_do P((int, int)),
+    send_dont P((int, int)),
+    send_will P((int, int)),
+    send_wont P((int, int));
+
+extern void
+    lm_will P((unsigned char *, int)),
+    lm_wont P((unsigned char *, int)),
+    lm_do P((unsigned char *, int)),
+    lm_dont P((unsigned char *, int)),
+    lm_mode P((unsigned char *, int, int));
+
+extern void
+    slc_init P((void)),
+    slcstate P((void)),
+    slc_mode_export P((void)),
+    slc_mode_import P((int)),
+    slc_import P((int)),
+    slc_export P((void)),
+    slc P((unsigned char *, int)),
+    slc_check P((void)),
+    slc_start_reply P((void)),
+    slc_add_reply P((int, int, int)),
+    slc_end_reply P((void));
+extern int
+    slc_update P((void));
+
+extern void
+    env_opt P((unsigned char *, int)),
+    env_opt_start P((void)),
+    env_opt_start_info P((void)),
+    env_opt_add P((unsigned char *)),
+    env_opt_end P((int));
+
+extern unsigned char
+    *env_default P((int, int)),
+    *env_getvalue P((unsigned char *));
+
+extern int
+    get_status P((void)),
+    dosynch P((void));
+
+extern cc_t
+    *tcval P((int));
+
+#ifndef	USE_TERMIO
+
+extern struct	tchars ntc;
+extern struct	ltchars nltc;
+extern struct	sgttyb nttyb;
+
+# define termEofChar		ntc.t_eofc
+# define termEraseChar		nttyb.sg_erase
+# define termFlushChar		nltc.t_flushc
+# define termIntChar		ntc.t_intrc
+# define termKillChar		nttyb.sg_kill
+# define termLiteralNextChar	nltc.t_lnextc
+# define termQuitChar		ntc.t_quitc
+# define termSuspChar		nltc.t_suspc
+# define termRprntChar		nltc.t_rprntc
+# define termWerasChar		nltc.t_werasc
+# define termStartChar		ntc.t_startc
+# define termStopChar		ntc.t_stopc
+# define termForw1Char		ntc.t_brkc
+extern cc_t termForw2Char;
+extern cc_t termAytChar;
+
+# define termEofCharp		(cc_t *)&ntc.t_eofc
+# define termEraseCharp		(cc_t *)&nttyb.sg_erase
+# define termFlushCharp		(cc_t *)&nltc.t_flushc
+# define termIntCharp		(cc_t *)&ntc.t_intrc
+# define termKillCharp		(cc_t *)&nttyb.sg_kill
+# define termLiteralNextCharp	(cc_t *)&nltc.t_lnextc
+# define termQuitCharp		(cc_t *)&ntc.t_quitc
+# define termSuspCharp		(cc_t *)&nltc.t_suspc
+# define termRprntCharp		(cc_t *)&nltc.t_rprntc
+# define termWerasCharp		(cc_t *)&nltc.t_werasc
+# define termStartCharp		(cc_t *)&ntc.t_startc
+# define termStopCharp		(cc_t *)&ntc.t_stopc
+# define termForw1Charp		(cc_t *)&ntc.t_brkc
+# define termForw2Charp		(cc_t *)&termForw2Char
+# define termAytCharp		(cc_t *)&termAytChar
+
+# else
+
+extern struct	termio new_tc;
+
+# define termEofChar		new_tc.c_cc[VEOF]
+# define termEraseChar		new_tc.c_cc[VERASE]
+# define termIntChar		new_tc.c_cc[VINTR]
+# define termKillChar		new_tc.c_cc[VKILL]
+# define termQuitChar		new_tc.c_cc[VQUIT]
+
+# ifndef	VSUSP
+extern cc_t termSuspChar;
+# else
+#  define termSuspChar		new_tc.c_cc[VSUSP]
+# endif
+# if	defined(VFLUSHO) && !defined(VDISCARD)
+#  define VDISCARD VFLUSHO
+# endif
+# ifndef	VDISCARD
+extern cc_t termFlushChar;
+# else
+#  define termFlushChar		new_tc.c_cc[VDISCARD]
+# endif
+# ifndef VWERASE
+extern cc_t termWerasChar;
+# else
+#  define termWerasChar		new_tc.c_cc[VWERASE]
+# endif
+# ifndef	VREPRINT
+extern cc_t termRprntChar;
+# else
+#  define termRprntChar		new_tc.c_cc[VREPRINT]
+# endif
+# ifndef	VLNEXT
+extern cc_t termLiteralNextChar;
+# else
+#  define termLiteralNextChar	new_tc.c_cc[VLNEXT]
+# endif
+# ifndef	VSTART
+extern cc_t termStartChar;
+# else
+#  define termStartChar		new_tc.c_cc[VSTART]
+# endif
+# ifndef	VSTOP
+extern cc_t termStopChar;
+# else
+#  define termStopChar		new_tc.c_cc[VSTOP]
+# endif
+# ifndef	VEOL
+extern cc_t termForw1Char;
+# else
+#  define termForw1Char		new_tc.c_cc[VEOL]
+# endif
+# ifndef	VEOL2
+extern cc_t termForw2Char;
+# else
+#  define termForw2Char		new_tc.c_cc[VEOL]
+# endif
+# ifndef	VSTATUS
+extern cc_t termAytChar;
+#else
+#  define termAytChar		new_tc.c_cc[VSTATUS]
+#endif
+
+# if !defined(CRAY) || defined(__STDC__)
+#  define termEofCharp		&termEofChar
+#  define termEraseCharp	&termEraseChar
+#  define termIntCharp		&termIntChar
+#  define termKillCharp		&termKillChar
+#  define termQuitCharp		&termQuitChar
+#  define termSuspCharp		&termSuspChar
+#  define termFlushCharp	&termFlushChar
+#  define termWerasCharp	&termWerasChar
+#  define termRprntCharp	&termRprntChar
+#  define termLiteralNextCharp	&termLiteralNextChar
+#  define termStartCharp	&termStartChar
+#  define termStopCharp		&termStopChar
+#  define termForw1Charp	&termForw1Char
+#  define termForw2Charp	&termForw2Char
+#  define termAytCharp		&termAytChar
+# else
+	/* Work around a compiler bug */
+#  define termEofCharp		0
+#  define termEraseCharp	0
+#  define termIntCharp		0
+#  define termKillCharp		0
+#  define termQuitCharp		0
+#  define termSuspCharp		0
+#  define termFlushCharp	0
+#  define termWerasCharp	0
+#  define termRprntCharp	0
+#  define termLiteralNextCharp	0
+#  define termStartCharp	0
+#  define termStopCharp		0
+#  define termForw1Charp	0
+#  define termForw2Charp	0
+#  define termAytCharp		0
+# endif
+#endif
+
+
+/* Ring buffer structures which are shared */
+
+extern Ring
+    netoring,
+    netiring,
+    ttyoring,
+    ttyiring;
+
+/* Tn3270 section */
+#if	defined(TN3270)
+
+extern int
+    HaveInput,		/* Whether an asynchronous I/O indication came in */
+    noasynchtty,	/* Don't do signals on I/O (SIGURG, SIGIO) */
+    noasynchnet,	/* Don't do signals on I/O (SIGURG, SIGIO) */
+    sigiocount,		/* Count of SIGIO receptions */
+    shell_active;	/* Subshell is active */
+
+extern char
+    *Ibackp,		/* Oldest byte of 3270 data */
+    Ibuf[],		/* 3270 buffer */
+    *Ifrontp,		/* Where next 3270 byte goes */
+    tline[],
+    *transcom;		/* Transparent command */
+
+extern int
+    settranscom P((int, char**));
+
+extern void
+    inputAvailable P((int));
+#endif	/* defined(TN3270) */
diff --git a/contrib/telnet/telnet/fdset.h b/contrib/telnet/telnet/fdset.h
new file mode 100644
index 0000000..045bb72
--- /dev/null
+++ b/contrib/telnet/telnet/fdset.h
@@ -0,0 +1,49 @@
+/*
+ * Copyright (c) 1988, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *	@(#)fdset.h	8.1 (Berkeley) 6/6/93
+ */
+
+/*
+ * The following is defined just in case someone should want to run
+ * this telnet on a 4.2 system.
+ *
+ */
+
+#ifndef	FD_SETSIZE
+
+#define	FD_SET(n, p)	((p)->fds_bits[0] |= (1<<(n)))
+#define	FD_CLR(n, p)	((p)->fds_bits[0] &= ~(1<<(n)))
+#define	FD_ISSET(n, p)	((p)->fds_bits[0] & (1<<(n)))
+#define FD_ZERO(p)	((p)->fds_bits[0] = 0)
+
+#endif
diff --git a/contrib/telnet/telnet/general.h b/contrib/telnet/telnet/general.h
new file mode 100644
index 0000000..4efa951
--- /dev/null
+++ b/contrib/telnet/telnet/general.h
@@ -0,0 +1,45 @@
+/*
+ * Copyright (c) 1988, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *	@(#)general.h	8.1 (Berkeley) 6/6/93
+ */
+
+/*
+ * Some general definitions.
+ */
+
+
+#define	numberof(x)	(sizeof x/sizeof x[0])
+#define	highestof(x)	(numberof(x)-1)
+
+#define	ClearElement(x)		memset((char *)&x, 0, sizeof x)
+#define	ClearArray(x)		memset((char *)x, 0, sizeof x)
diff --git a/contrib/telnet/telnet/main.c b/contrib/telnet/telnet/main.c
new file mode 100644
index 0000000..6073dbf
--- /dev/null
+++ b/contrib/telnet/telnet/main.c
@@ -0,0 +1,322 @@
+/*
+ * Copyright (c) 1988, 1990, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef lint
+static char copyright[] =
+"@(#) Copyright (c) 1988, 1990, 1993\n\
+	The Regents of the University of California.  All rights reserved.\n";
+#endif /* not lint */
+
+#ifndef lint
+static char sccsid[] = "@(#)main.c	8.3 (Berkeley) 5/30/95";
+#endif /* not lint */
+
+#include <sys/types.h>
+
+#include "ring.h"
+#include "externs.h"
+#include "defines.h"
+
+/* These values need to be the same as defined in libtelnet/kerberos5.c */
+/* Either define them in both places, or put in some common header file. */
+#define OPTS_FORWARD_CREDS	0x00000002
+#define OPTS_FORWARDABLE_CREDS	0x00000001
+
+#if 0
+#define FORWARD
+#endif
+
+/*
+ * Initialize variables.
+ */
+    void
+tninit()
+{
+    init_terminal();
+
+    init_network();
+
+    init_telnet();
+
+    init_sys();
+
+#if defined(TN3270)
+    init_3270();
+#endif
+}
+
+	void
+usage()
+{
+	fprintf(stderr, "Usage: %s %s%s%s%s\n",
+	    prompt,
+#ifdef	AUTHENTICATION
+	    "[-8] [-E] [-K] [-L] [-S tos] [-X atype] [-a] [-c] [-d] [-e char]",
+	    "\n\t[-k realm] [-l user] [-f/-F] [-n tracefile] ",
+#else
+	    "[-8] [-E] [-L] [-S tos] [-a] [-c] [-d] [-e char] [-l user]",
+	    "\n\t[-n tracefile]",
+#endif
+#if defined(TN3270) && defined(unix)
+# ifdef AUTHENTICATION
+	    "[-noasynch] [-noasynctty]\n\t[-noasyncnet] [-r] [-t transcom] ",
+# else
+	    "[-noasynch] [-noasynctty] [-noasyncnet] [-r]\n\t[-t transcom]",
+# endif
+#else
+	    "[-r] ",
+#endif
+#ifdef	ENCRYPTION
+	    "[-x] [host-name [port]]"
+#else	/* ENCRYPTION */
+	    "[host-name [port]]"
+#endif	/* ENCRYPTION */
+	);
+	exit(1);
+}
+
+/*
+ * main.  Parse arguments, invoke the protocol or command parser.
+ */
+
+
+main(argc, argv)
+	int argc;
+	char *argv[];
+{
+	extern char *optarg;
+	extern int optind;
+	int ch;
+	char *user, *strrchr();
+#ifdef	FORWARD
+	extern int forward_flags;
+#endif	/* FORWARD */
+
+	tninit();		/* Clear out things */
+#if	defined(CRAY) && !defined(__STDC__)
+	_setlist_init();	/* Work around compiler bug */
+#endif
+
+	TerminalSaveState();
+
+	if (prompt = strrchr(argv[0], '/'))
+		++prompt;
+	else
+		prompt = argv[0];
+
+	user = NULL;
+
+	rlogin = (strncmp(prompt, "rlog", 4) == 0) ? '~' : _POSIX_VDISABLE;
+	autologin = -1;
+
+	while ((ch = getopt(argc, argv, "8EKLS:X:acde:fFk:l:n:rt:x")) != EOF) {
+		switch(ch) {
+		case '8':
+			eight = 3;	/* binary output and input */
+			break;
+		case 'E':
+			rlogin = escape = _POSIX_VDISABLE;
+			break;
+		case 'K':
+#ifdef	AUTHENTICATION
+			autologin = 0;
+#endif
+			break;
+		case 'L':
+			eight |= 2;	/* binary output only */
+			break;
+		case 'S':
+		    {
+#ifdef	HAS_GETTOS
+			extern int tos;
+
+			if ((tos = parsetos(optarg, "tcp")) < 0)
+				fprintf(stderr, "%s%s%s%s\n",
+					prompt, ": Bad TOS argument '",
+					optarg,
+					"; will try to use default TOS");
+#else
+			fprintf(stderr,
+			   "%s: Warning: -S ignored, no parsetos() support.\n",
+								prompt);
+#endif
+		    }
+			break;
+		case 'X':
+#ifdef	AUTHENTICATION
+			auth_disable_name(optarg);
+#endif
+			break;
+		case 'a':
+			autologin = 1;
+			break;
+		case 'c':
+			skiprc = 1;
+			break;
+		case 'd':
+			debug = 1;
+			break;
+		case 'e':
+			set_escape_char(optarg);
+			break;
+		case 'f':
+#if defined(AUTHENTICATION) && defined(KRB5) && defined(FORWARD)
+			if (forward_flags & OPTS_FORWARD_CREDS) {
+			    fprintf(stderr,
+				    "%s: Only one of -f and -F allowed.\n",
+				    prompt);
+			    usage();
+			}
+			forward_flags |= OPTS_FORWARD_CREDS;
+#else
+			fprintf(stderr,
+			 "%s: Warning: -f ignored, no Kerberos V5 support.\n",
+				prompt);
+#endif
+			break;
+		case 'F':
+#if defined(AUTHENTICATION) && defined(KRB5) && defined(FORWARD)
+			if (forward_flags & OPTS_FORWARD_CREDS) {
+			    fprintf(stderr,
+				    "%s: Only one of -f and -F allowed.\n",
+				    prompt);
+			    usage();
+			}
+			forward_flags |= OPTS_FORWARD_CREDS;
+			forward_flags |= OPTS_FORWARDABLE_CREDS;
+#else
+			fprintf(stderr,
+			 "%s: Warning: -F ignored, no Kerberos V5 support.\n",
+				prompt);
+#endif
+			break;
+		case 'k':
+#if defined(AUTHENTICATION) && defined(KRB4)
+		    {
+			extern char *dest_realm, dst_realm_buf[], dst_realm_sz;
+			dest_realm = dst_realm_buf;
+			(void)strncpy(dest_realm, optarg, dst_realm_sz);
+		    }
+#else
+			fprintf(stderr,
+			   "%s: Warning: -k ignored, no Kerberos V4 support.\n",
+								prompt);
+#endif
+			break;
+		case 'l':
+			autologin = 1;
+			user = optarg;
+			break;
+		case 'n':
+#if defined(TN3270) && defined(unix)
+			/* distinguish between "-n oasynch" and "-noasynch" */
+			if (argv[optind - 1][0] == '-' && argv[optind - 1][1]
+			    == 'n' && argv[optind - 1][2] == 'o') {
+				if (!strcmp(optarg, "oasynch")) {
+					noasynchtty = 1;
+					noasynchnet = 1;
+				} else if (!strcmp(optarg, "oasynchtty"))
+					noasynchtty = 1;
+				else if (!strcmp(optarg, "oasynchnet"))
+					noasynchnet = 1;
+			} else
+#endif	/* defined(TN3270) && defined(unix) */
+				SetNetTrace(optarg);
+			break;
+		case 'r':
+			rlogin = '~';
+			break;
+		case 't':
+#if defined(TN3270) && defined(unix)
+			transcom = tline;
+			(void)strcpy(transcom, optarg);
+#else
+			fprintf(stderr,
+			   "%s: Warning: -t ignored, no TN3270 support.\n",
+								prompt);
+#endif
+			break;
+		case 'x':
+#ifdef	ENCRYPTION
+			encrypt_auto(1);
+			decrypt_auto(1);
+#else	/* ENCRYPTION */
+			fprintf(stderr,
+			    "%s: Warning: -x ignored, no ENCRYPT support.\n",
+								prompt);
+#endif	/* ENCRYPTION */
+			break;
+		case '?':
+		default:
+			usage();
+			/* NOTREACHED */
+		}
+	}
+	if (autologin == -1)
+		autologin = (rlogin == _POSIX_VDISABLE) ? 0 : 1;
+
+	argc -= optind;
+	argv += optind;
+
+	if (argc) {
+		char *args[7], **argp = args;
+
+		if (argc > 2)
+			usage();
+		*argp++ = prompt;
+		if (user) {
+			*argp++ = "-l";
+			*argp++ = user;
+		}
+		*argp++ = argv[0];		/* host */
+		if (argc > 1)
+			*argp++ = argv[1];	/* port */
+		*argp = 0;
+
+		if (setjmp(toplevel) != 0)
+			Exit(0);
+		if (tn(argp - args, args) == 1)
+			return (0);
+		else
+			return (1);
+	}
+	(void)setjmp(toplevel);
+	for (;;) {
+#ifdef TN3270
+		if (shell_active)
+			shell_continue();
+		else
+#endif
+			command(1, 0, 0);
+	}
+}
diff --git a/contrib/telnet/telnet/network.c b/contrib/telnet/telnet/network.c
new file mode 100644
index 0000000..0fe5cee
--- /dev/null
+++ b/contrib/telnet/telnet/network.c
@@ -0,0 +1,177 @@
+/*
+ * Copyright (c) 1988, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef lint
+static char sccsid[] = "@(#)network.c	8.2 (Berkeley) 12/15/93";
+#endif /* not lint */
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/time.h>
+
+#include <errno.h>
+
+#include <arpa/telnet.h>
+
+#include "ring.h"
+
+#include "defines.h"
+#include "externs.h"
+#include "fdset.h"
+
+Ring		netoring, netiring;
+unsigned char	netobuf[2*BUFSIZ], netibuf[BUFSIZ];
+
+/*
+ * Initialize internal network data structures.
+ */
+
+    void
+init_network()
+{
+    if (ring_init(&netoring, netobuf, sizeof netobuf) != 1) {
+	exit(1);
+    }
+    if (ring_init(&netiring, netibuf, sizeof netibuf) != 1) {
+	exit(1);
+    }
+    NetTrace = stdout;
+}
+
+
+/*
+ * Check to see if any out-of-band data exists on a socket (for
+ * Telnet "synch" processing).
+ */
+
+    int
+stilloob()
+{
+    static struct timeval timeout = { 0 };
+    fd_set	excepts;
+    int value;
+
+    do {
+	FD_ZERO(&excepts);
+	FD_SET(net, &excepts);
+	value = select(net+1, (fd_set *)0, (fd_set *)0, &excepts, &timeout);
+    } while ((value == -1) && (errno == EINTR));
+
+    if (value < 0) {
+	perror("select");
+	(void) quit();
+	/* NOTREACHED */
+    }
+    if (FD_ISSET(net, &excepts)) {
+	return 1;
+    } else {
+	return 0;
+    }
+}
+
+
+/*
+ *  setneturg()
+ *
+ *	Sets "neturg" to the current location.
+ */
+
+    void
+setneturg()
+{
+    ring_mark(&netoring);
+}
+
+
+/*
+ *  netflush
+ *		Send as much data as possible to the network,
+ *	handling requests for urgent data.
+ *
+ *		The return value indicates whether we did any
+ *	useful work.
+ */
+
+
+    int
+netflush()
+{
+    register int n, n1;
+
+#ifdef	ENCRYPTION
+    if (encrypt_output)
+	ring_encrypt(&netoring, encrypt_output);
+#endif	/* ENCRYPTION */
+    if ((n1 = n = ring_full_consecutive(&netoring)) > 0) {
+	if (!ring_at_mark(&netoring)) {
+	    n = send(net, (char *)netoring.consume, n, 0); /* normal write */
+	} else {
+	    /*
+	     * In 4.2 (and 4.3) systems, there is some question about
+	     * what byte in a sendOOB operation is the "OOB" data.
+	     * To make ourselves compatible, we only send ONE byte
+	     * out of band, the one WE THINK should be OOB (though
+	     * we really have more the TCP philosophy of urgent data
+	     * rather than the Unix philosophy of OOB data).
+	     */
+	    n = send(net, (char *)netoring.consume, 1, MSG_OOB);/* URGENT data */
+	}
+    }
+    if (n < 0) {
+	if (errno != ENOBUFS && errno != EWOULDBLOCK) {
+	    setcommandmode();
+	    perror(hostname);
+	    (void)NetClose(net);
+	    ring_clear_mark(&netoring);
+	    longjmp(peerdied, -1);
+	    /*NOTREACHED*/
+	}
+	n = 0;
+    }
+    if (netdata && n) {
+	Dump('>', netoring.consume, n);
+    }
+    if (n) {
+	ring_consumed(&netoring, n);
+	/*
+	 * If we sent all, and more to send, then recurse to pick
+	 * up the other half.
+	 */
+	if ((n1 == n) && ring_full_consecutive(&netoring)) {
+	    (void) netflush();
+	}
+	return 1;
+    } else {
+	return 0;
+    }
+}
diff --git a/contrib/telnet/telnet/ring.c b/contrib/telnet/telnet/ring.c
new file mode 100644
index 0000000..37dfda8
--- /dev/null
+++ b/contrib/telnet/telnet/ring.c
@@ -0,0 +1,362 @@
+/*
+ * Copyright (c) 1988, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef lint
+static char sccsid[] = "@(#)ring.c	8.2 (Berkeley) 5/30/95";
+#endif /* not lint */
+
+/*
+ * This defines a structure for a ring buffer.
+ *
+ * The circular buffer has two parts:
+ *(((
+ *	full:	[consume, supply)
+ *	empty:	[supply, consume)
+ *]]]
+ *
+ */
+
+#include	<stdio.h>
+#include	<errno.h>
+
+#ifdef	size_t
+#undef	size_t
+#endif
+
+#include	<sys/types.h>
+#ifndef	FILIO_H
+#include	<sys/ioctl.h>
+#endif
+#include	<sys/socket.h>
+
+#include	"ring.h"
+#include	"general.h"
+
+/* Internal macros */
+
+#if	!defined(MIN)
+#define	MIN(a,b)	(((a)<(b))? (a):(b))
+#endif	/* !defined(MIN) */
+
+#define	ring_subtract(d,a,b)	(((a)-(b) >= 0)? \
+					(a)-(b): (((a)-(b))+(d)->size))
+
+#define	ring_increment(d,a,c)	(((a)+(c) < (d)->top)? \
+					(a)+(c) : (((a)+(c))-(d)->size))
+
+#define	ring_decrement(d,a,c)	(((a)-(c) >= (d)->bottom)? \
+					(a)-(c) : (((a)-(c))-(d)->size))
+
+
+/*
+ * The following is a clock, used to determine full, empty, etc.
+ *
+ * There is some trickiness here.  Since the ring buffers are initialized
+ * to ZERO on allocation, we need to make sure, when interpreting the
+ * clock, that when the times are EQUAL, then the buffer is FULL.
+ */
+static u_long ring_clock = 0;
+
+
+#define	ring_empty(d) (((d)->consume == (d)->supply) && \
+				((d)->consumetime >= (d)->supplytime))
+#define	ring_full(d) (((d)->supply == (d)->consume) && \
+				((d)->supplytime > (d)->consumetime))
+
+
+
+
+
+/* Buffer state transition routines */
+
+    ring_init(ring, buffer, count)
+Ring *ring;
+    unsigned char *buffer;
+    int count;
+{
+    memset((char *)ring, 0, sizeof *ring);
+
+    ring->size = count;
+
+    ring->supply = ring->consume = ring->bottom = buffer;
+
+    ring->top = ring->bottom+ring->size;
+
+#ifdef	ENCRYPTION
+    ring->clearto = 0;
+#endif	/* ENCRYPTION */
+
+    return 1;
+}
+
+/* Mark routines */
+
+/*
+ * Mark the most recently supplied byte.
+ */
+
+    void
+ring_mark(ring)
+    Ring *ring;
+{
+    ring->mark = ring_decrement(ring, ring->supply, 1);
+}
+
+/*
+ * Is the ring pointing to the mark?
+ */
+
+    int
+ring_at_mark(ring)
+    Ring *ring;
+{
+    if (ring->mark == ring->consume) {
+	return 1;
+    } else {
+	return 0;
+    }
+}
+
+/*
+ * Clear any mark set on the ring.
+ */
+
+    void
+ring_clear_mark(ring)
+    Ring *ring;
+{
+    ring->mark = 0;
+}
+
+/*
+ * Add characters from current segment to ring buffer.
+ */
+    void
+ring_supplied(ring, count)
+    Ring *ring;
+    int count;
+{
+    ring->supply = ring_increment(ring, ring->supply, count);
+    ring->supplytime = ++ring_clock;
+}
+
+/*
+ * We have just consumed "c" bytes.
+ */
+    void
+ring_consumed(ring, count)
+    Ring *ring;
+    int count;
+{
+    if (count == 0)	/* don't update anything */
+	return;
+
+    if (ring->mark &&
+		(ring_subtract(ring, ring->mark, ring->consume) < count)) {
+	ring->mark = 0;
+    }
+#ifdef	ENCRYPTION
+    if (ring->consume < ring->clearto &&
+		ring->clearto <= ring->consume + count)
+	ring->clearto = 0;
+    else if (ring->consume + count > ring->top &&
+		ring->bottom <= ring->clearto &&
+		ring->bottom + ((ring->consume + count) - ring->top))
+	ring->clearto = 0;
+#endif	/* ENCRYPTION */
+    ring->consume = ring_increment(ring, ring->consume, count);
+    ring->consumetime = ++ring_clock;
+    /*
+     * Try to encourage "ring_empty_consecutive()" to be large.
+     */
+    if (ring_empty(ring)) {
+	ring->consume = ring->supply = ring->bottom;
+    }
+}
+
+
+
+/* Buffer state query routines */
+
+
+/* Number of bytes that may be supplied */
+    int
+ring_empty_count(ring)
+    Ring *ring;
+{
+    if (ring_empty(ring)) {	/* if empty */
+	    return ring->size;
+    } else {
+	return ring_subtract(ring, ring->consume, ring->supply);
+    }
+}
+
+/* number of CONSECUTIVE bytes that may be supplied */
+    int
+ring_empty_consecutive(ring)
+    Ring *ring;
+{
+    if ((ring->consume < ring->supply) || ring_empty(ring)) {
+			    /*
+			     * if consume is "below" supply, or empty, then
+			     * return distance to the top
+			     */
+	return ring_subtract(ring, ring->top, ring->supply);
+    } else {
+				    /*
+				     * else, return what we may.
+				     */
+	return ring_subtract(ring, ring->consume, ring->supply);
+    }
+}
+
+/* Return the number of bytes that are available for consuming
+ * (but don't give more than enough to get to cross over set mark)
+ */
+
+    int
+ring_full_count(ring)
+    Ring *ring;
+{
+    if ((ring->mark == 0) || (ring->mark == ring->consume)) {
+	if (ring_full(ring)) {
+	    return ring->size;	/* nothing consumed, but full */
+	} else {
+	    return ring_subtract(ring, ring->supply, ring->consume);
+	}
+    } else {
+	return ring_subtract(ring, ring->mark, ring->consume);
+    }
+}
+
+/*
+ * Return the number of CONSECUTIVE bytes available for consuming.
+ * However, don't return more than enough to cross over set mark.
+ */
+    int
+ring_full_consecutive(ring)
+    Ring *ring;
+{
+    if ((ring->mark == 0) || (ring->mark == ring->consume)) {
+	if ((ring->supply < ring->consume) || ring_full(ring)) {
+	    return ring_subtract(ring, ring->top, ring->consume);
+	} else {
+	    return ring_subtract(ring, ring->supply, ring->consume);
+	}
+    } else {
+	if (ring->mark < ring->consume) {
+	    return ring_subtract(ring, ring->top, ring->consume);
+	} else {	/* Else, distance to mark */
+	    return ring_subtract(ring, ring->mark, ring->consume);
+	}
+    }
+}
+
+/*
+ * Move data into the "supply" portion of of the ring buffer.
+ */
+    void
+ring_supply_data(ring, buffer, count)
+    Ring *ring;
+    unsigned char *buffer;
+    int count;
+{
+    int i;
+
+    while (count) {
+	i = MIN(count, ring_empty_consecutive(ring));
+	memmove(ring->supply, buffer, i);
+	ring_supplied(ring, i);
+	count -= i;
+	buffer += i;
+    }
+}
+
+#ifdef notdef
+
+/*
+ * Move data from the "consume" portion of the ring buffer
+ */
+    void
+ring_consume_data(ring, buffer, count)
+    Ring *ring;
+    unsigned char *buffer;
+    int count;
+{
+    int i;
+
+    while (count) {
+	i = MIN(count, ring_full_consecutive(ring));
+	memmove(buffer, ring->consume, i);
+	ring_consumed(ring, i);
+	count -= i;
+	buffer += i;
+    }
+}
+#endif
+
+#ifdef	ENCRYPTION
+    void
+ring_encrypt(ring, encryptor)
+    Ring *ring;
+    void (*encryptor)();
+{
+    unsigned char *s, *c;
+
+    if (ring_empty(ring) || ring->clearto == ring->supply)
+	return;
+
+    if (!(c = ring->clearto))
+	c = ring->consume;
+
+    s = ring->supply;
+
+    if (s <= c) {
+	(*encryptor)(c, ring->top - c);
+	(*encryptor)(ring->bottom, s - ring->bottom);
+    } else
+	(*encryptor)(c, s - c);
+
+    ring->clearto = ring->supply;
+}
+
+    void
+ring_clearto(ring)
+    Ring *ring;
+{
+    if (!ring_empty(ring))
+	ring->clearto = ring->supply;
+    else
+	ring->clearto = 0;
+}
+#endif	/* ENCRYPTION */
diff --git a/contrib/telnet/telnet/ring.h b/contrib/telnet/telnet/ring.h
new file mode 100644
index 0000000..2a36781
--- /dev/null
+++ b/contrib/telnet/telnet/ring.h
@@ -0,0 +1,105 @@
+/*
+ * Copyright (c) 1988, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *	@(#)ring.h	8.1 (Berkeley) 6/6/93
+ */
+
+#if defined(P)
+# undef P
+#endif
+
+#if defined(__STDC__) || defined(LINT_ARGS)
+# define	P(x)	x
+#else
+# define	P(x)	()
+#endif
+
+/*
+ * This defines a structure for a ring buffer.
+ *
+ * The circular buffer has two parts:
+ *(((
+ *	full:	[consume, supply)
+ *	empty:	[supply, consume)
+ *]]]
+ *
+ */
+typedef struct {
+    unsigned char	*consume,	/* where data comes out of */
+			*supply,	/* where data comes in to */
+			*bottom,	/* lowest address in buffer */
+			*top,		/* highest address+1 in buffer */
+			*mark;		/* marker (user defined) */
+#ifdef	ENCRYPTION
+    unsigned char	*clearto;	/* Data to this point is clear text */
+    unsigned char	*encryyptedto;	/* Data is encrypted to here */
+#endif	/* ENCRYPTION */
+    int		size;		/* size in bytes of buffer */
+    u_long	consumetime,	/* help us keep straight full, empty, etc. */
+		supplytime;
+} Ring;
+
+/* Here are some functions and macros to deal with the ring buffer */
+
+/* Initialization routine */
+extern int
+	ring_init P((Ring *ring, unsigned char *buffer, int count));
+
+/* Data movement routines */
+extern void
+	ring_supply_data P((Ring *ring, unsigned char *buffer, int count));
+#ifdef notdef
+extern void
+	ring_consume_data P((Ring *ring, unsigned char *buffer, int count));
+#endif
+
+/* Buffer state transition routines */
+extern void
+	ring_supplied P((Ring *ring, int count)),
+	ring_consumed P((Ring *ring, int count));
+
+/* Buffer state query routines */
+extern int
+	ring_empty_count P((Ring *ring)),
+	ring_empty_consecutive P((Ring *ring)),
+	ring_full_count P((Ring *ring)),
+	ring_full_consecutive P((Ring *ring));
+
+#ifdef	ENCRYPTION
+extern void
+	ring_encrypt P((Ring *ring, void (*func)())),
+	ring_clearto P((Ring *ring));
+#endif	/* ENCRYPTION */
+
+extern void
+    ring_clear_mark(),
+    ring_mark();
diff --git a/contrib/telnet/telnet/sys_bsd.c b/contrib/telnet/telnet/sys_bsd.c
new file mode 100644
index 0000000..f2769ac
--- /dev/null
+++ b/contrib/telnet/telnet/sys_bsd.c
@@ -0,0 +1,1220 @@
+/*
+ * Copyright (c) 1988, 1990, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef lint
+static char sccsid[] = "@(#)sys_bsd.c	8.4 (Berkeley) 5/30/95";
+#endif /* not lint */
+
+/*
+ * The following routines try to encapsulate what is system dependent
+ * (at least between 4.x and dos) which is used in telnet.c.
+ */
+
+
+#include <fcntl.h>
+#include <sys/types.h>
+#include <sys/time.h>
+#include <sys/socket.h>
+#include <signal.h>
+#include <errno.h>
+#include <arpa/telnet.h>
+
+#include "ring.h"
+
+#include "fdset.h"
+
+#include "defines.h"
+#include "externs.h"
+#include "types.h"
+
+#if	defined(CRAY) || (defined(USE_TERMIO) && !defined(SYSV_TERMIO))
+#define	SIG_FUNC_RET	void
+#else
+#define	SIG_FUNC_RET	int
+#endif
+
+#ifdef	SIGINFO
+extern SIG_FUNC_RET ayt_status();
+#endif
+
+int
+	tout,			/* Output file descriptor */
+	tin,			/* Input file descriptor */
+	net;
+
+#ifndef	USE_TERMIO
+struct	tchars otc = { 0 }, ntc = { 0 };
+struct	ltchars oltc = { 0 }, nltc = { 0 };
+struct	sgttyb ottyb = { 0 }, nttyb = { 0 };
+int	olmode = 0;
+# define cfgetispeed(ptr)	(ptr)->sg_ispeed
+# define cfgetospeed(ptr)	(ptr)->sg_ospeed
+# define old_tc ottyb
+
+#else	/* USE_TERMIO */
+struct	termio old_tc = { 0 };
+extern struct termio new_tc;
+
+# ifndef	TCSANOW
+#  ifdef TCSETS
+#   define	TCSANOW		TCSETS
+#   define	TCSADRAIN	TCSETSW
+#   define	tcgetattr(f, t) ioctl(f, TCGETS, (char *)t)
+#  else
+#   ifdef TCSETA
+#    define	TCSANOW		TCSETA
+#    define	TCSADRAIN	TCSETAW
+#    define	tcgetattr(f, t) ioctl(f, TCGETA, (char *)t)
+#   else
+#    define	TCSANOW		TIOCSETA
+#    define	TCSADRAIN	TIOCSETAW
+#    define	tcgetattr(f, t) ioctl(f, TIOCGETA, (char *)t)
+#   endif
+#  endif
+#  define	tcsetattr(f, a, t) ioctl(f, a, (char *)t)
+#  define	cfgetospeed(ptr)	((ptr)->c_cflag&CBAUD)
+#  ifdef CIBAUD
+#   define	cfgetispeed(ptr)	(((ptr)->c_cflag&CIBAUD) >> IBSHIFT)
+#  else
+#   define	cfgetispeed(ptr)	cfgetospeed(ptr)
+#  endif
+# endif /* TCSANOW */
+# ifdef	sysV88
+# define TIOCFLUSH TC_PX_DRAIN
+# endif
+#endif	/* USE_TERMIO */
+
+static fd_set ibits, obits, xbits;
+
+
+    void
+init_sys()
+{
+    tout = fileno(stdout);
+    tin = fileno(stdin);
+    FD_ZERO(&ibits);
+    FD_ZERO(&obits);
+    FD_ZERO(&xbits);
+
+    errno = 0;
+}
+
+
+    int
+TerminalWrite(buf, n)
+    char *buf;
+    int  n;
+{
+    return write(tout, buf, n);
+}
+
+    int
+TerminalRead(buf, n)
+    unsigned char *buf;
+    int  n;
+{
+    return read(tin, buf, n);
+}
+
+/*
+ *
+ */
+
+    int
+TerminalAutoFlush()
+{
+#if	defined(LNOFLSH)
+    int flush;
+
+    ioctl(0, TIOCLGET, (char *)&flush);
+    return !(flush&LNOFLSH);	/* if LNOFLSH, no autoflush */
+#else	/* LNOFLSH */
+    return 1;
+#endif	/* LNOFLSH */
+}
+
+#ifdef	KLUDGELINEMODE
+extern int kludgelinemode;
+#endif
+/*
+ * TerminalSpecialChars()
+ *
+ * Look at an input character to see if it is a special character
+ * and decide what to do.
+ *
+ * Output:
+ *
+ *	0	Don't add this character.
+ *	1	Do add this character
+ */
+
+extern void xmitAO(), xmitEL(), xmitEC(), intp(), sendbrk();
+
+    int
+TerminalSpecialChars(c)
+    int	c;
+{
+    if (c == termIntChar) {
+	intp();
+	return 0;
+    } else if (c == termQuitChar) {
+#ifdef	KLUDGELINEMODE
+	if (kludgelinemode)
+	    sendbrk();
+	else
+#endif
+	    sendabort();
+	return 0;
+    } else if (c == termEofChar) {
+	if (my_want_state_is_will(TELOPT_LINEMODE)) {
+	    sendeof();
+	    return 0;
+	}
+	return 1;
+    } else if (c == termSuspChar) {
+	sendsusp();
+	return(0);
+    } else if (c == termFlushChar) {
+	xmitAO();		/* Transmit Abort Output */
+	return 0;
+    } else if (!MODE_LOCAL_CHARS(globalmode)) {
+	if (c == termKillChar) {
+	    xmitEL();
+	    return 0;
+	} else if (c == termEraseChar) {
+	    xmitEC();		/* Transmit Erase Character */
+	    return 0;
+	}
+    }
+    return 1;
+}
+
+
+/*
+ * Flush output to the terminal
+ */
+
+    void
+TerminalFlushOutput()
+{
+#ifdef	TIOCFLUSH
+    (void) ioctl(fileno(stdout), TIOCFLUSH, (char *) 0);
+#else
+    (void) ioctl(fileno(stdout), TCFLSH, (char *) 0);
+#endif
+}
+
+    void
+TerminalSaveState()
+{
+#ifndef	USE_TERMIO
+    ioctl(0, TIOCGETP, (char *)&ottyb);
+    ioctl(0, TIOCGETC, (char *)&otc);
+    ioctl(0, TIOCGLTC, (char *)&oltc);
+    ioctl(0, TIOCLGET, (char *)&olmode);
+
+    ntc = otc;
+    nltc = oltc;
+    nttyb = ottyb;
+
+#else	/* USE_TERMIO */
+    tcgetattr(0, &old_tc);
+
+    new_tc = old_tc;
+
+#ifndef	VDISCARD
+    termFlushChar = CONTROL('O');
+#endif
+#ifndef	VWERASE
+    termWerasChar = CONTROL('W');
+#endif
+#ifndef	VREPRINT
+    termRprntChar = CONTROL('R');
+#endif
+#ifndef	VLNEXT
+    termLiteralNextChar = CONTROL('V');
+#endif
+#ifndef	VSTART
+    termStartChar = CONTROL('Q');
+#endif
+#ifndef	VSTOP
+    termStopChar = CONTROL('S');
+#endif
+#ifndef	VSTATUS
+    termAytChar = CONTROL('T');
+#endif
+#endif	/* USE_TERMIO */
+}
+
+    cc_t *
+tcval(func)
+    register int func;
+{
+    switch(func) {
+    case SLC_IP:	return(&termIntChar);
+    case SLC_ABORT:	return(&termQuitChar);
+    case SLC_EOF:	return(&termEofChar);
+    case SLC_EC:	return(&termEraseChar);
+    case SLC_EL:	return(&termKillChar);
+    case SLC_XON:	return(&termStartChar);
+    case SLC_XOFF:	return(&termStopChar);
+    case SLC_FORW1:	return(&termForw1Char);
+#ifdef	USE_TERMIO
+    case SLC_FORW2:	return(&termForw2Char);
+# ifdef	VDISCARD
+    case SLC_AO:	return(&termFlushChar);
+# endif
+# ifdef	VSUSP
+    case SLC_SUSP:	return(&termSuspChar);
+# endif
+# ifdef	VWERASE
+    case SLC_EW:	return(&termWerasChar);
+# endif
+# ifdef	VREPRINT
+    case SLC_RP:	return(&termRprntChar);
+# endif
+# ifdef	VLNEXT
+    case SLC_LNEXT:	return(&termLiteralNextChar);
+# endif
+# ifdef	VSTATUS
+    case SLC_AYT:	return(&termAytChar);
+# endif
+#endif
+
+    case SLC_SYNCH:
+    case SLC_BRK:
+    case SLC_EOR:
+    default:
+	return((cc_t *)0);
+    }
+}
+
+    void
+TerminalDefaultChars()
+{
+#ifndef	USE_TERMIO
+    ntc = otc;
+    nltc = oltc;
+    nttyb.sg_kill = ottyb.sg_kill;
+    nttyb.sg_erase = ottyb.sg_erase;
+#else	/* USE_TERMIO */
+    memmove(new_tc.c_cc, old_tc.c_cc, sizeof(old_tc.c_cc));
+# ifndef	VDISCARD
+    termFlushChar = CONTROL('O');
+# endif
+# ifndef	VWERASE
+    termWerasChar = CONTROL('W');
+# endif
+# ifndef	VREPRINT
+    termRprntChar = CONTROL('R');
+# endif
+# ifndef	VLNEXT
+    termLiteralNextChar = CONTROL('V');
+# endif
+# ifndef	VSTART
+    termStartChar = CONTROL('Q');
+# endif
+# ifndef	VSTOP
+    termStopChar = CONTROL('S');
+# endif
+# ifndef	VSTATUS
+    termAytChar = CONTROL('T');
+# endif
+#endif	/* USE_TERMIO */
+}
+
+#ifdef notdef
+void
+TerminalRestoreState()
+{
+}
+#endif
+
+/*
+ * TerminalNewMode - set up terminal to a specific mode.
+ *	MODE_ECHO: do local terminal echo
+ *	MODE_FLOW: do local flow control
+ *	MODE_TRAPSIG: do local mapping to TELNET IAC sequences
+ *	MODE_EDIT: do local line editing
+ *
+ *	Command mode:
+ *		MODE_ECHO|MODE_EDIT|MODE_FLOW|MODE_TRAPSIG
+ *		local echo
+ *		local editing
+ *		local xon/xoff
+ *		local signal mapping
+ *
+ *	Linemode:
+ *		local/no editing
+ *	Both Linemode and Single Character mode:
+ *		local/remote echo
+ *		local/no xon/xoff
+ *		local/no signal mapping
+ */
+
+
+    void
+TerminalNewMode(f)
+    register int f;
+{
+    static int prevmode = 0;
+#ifndef	USE_TERMIO
+    struct tchars tc;
+    struct ltchars ltc;
+    struct sgttyb sb;
+    int lmode;
+#else	/* USE_TERMIO */
+    struct termio tmp_tc;
+#endif	/* USE_TERMIO */
+    int onoff;
+    int old;
+    cc_t esc;
+
+    globalmode = f&~MODE_FORCE;
+    if (prevmode == f)
+	return;
+
+    /*
+     * Write any outstanding data before switching modes
+     * ttyflush() returns 0 only when there is no more data
+     * left to write out, it returns -1 if it couldn't do
+     * anything at all, otherwise it returns 1 + the number
+     * of characters left to write.
+#ifndef	USE_TERMIO
+     * We would really like ask the kernel to wait for the output
+     * to drain, like we can do with the TCSADRAIN, but we don't have
+     * that option.  The only ioctl that waits for the output to
+     * drain, TIOCSETP, also flushes the input queue, which is NOT
+     * what we want (TIOCSETP is like TCSADFLUSH).
+#endif
+     */
+    old = ttyflush(SYNCHing|flushout);
+    if (old < 0 || old > 1) {
+#ifdef	USE_TERMIO
+	tcgetattr(tin, &tmp_tc);
+#endif	/* USE_TERMIO */
+	do {
+	    /*
+	     * Wait for data to drain, then flush again.
+	     */
+#ifdef	USE_TERMIO
+	    tcsetattr(tin, TCSADRAIN, &tmp_tc);
+#endif	/* USE_TERMIO */
+	    old = ttyflush(SYNCHing|flushout);
+	} while (old < 0 || old > 1);
+    }
+
+    old = prevmode;
+    prevmode = f&~MODE_FORCE;
+#ifndef	USE_TERMIO
+    sb = nttyb;
+    tc = ntc;
+    ltc = nltc;
+    lmode = olmode;
+#else
+    tmp_tc = new_tc;
+#endif
+
+    if (f&MODE_ECHO) {
+#ifndef	USE_TERMIO
+	sb.sg_flags |= ECHO;
+#else
+	tmp_tc.c_lflag |= ECHO;
+	tmp_tc.c_oflag |= ONLCR;
+	if (crlf)
+		tmp_tc.c_iflag |= ICRNL;
+#endif
+    } else {
+#ifndef	USE_TERMIO
+	sb.sg_flags &= ~ECHO;
+#else
+	tmp_tc.c_lflag &= ~ECHO;
+	tmp_tc.c_oflag &= ~ONLCR;
+# ifdef notdef
+	if (crlf)
+		tmp_tc.c_iflag &= ~ICRNL;
+# endif
+#endif
+    }
+
+    if ((f&MODE_FLOW) == 0) {
+#ifndef	USE_TERMIO
+	tc.t_startc = _POSIX_VDISABLE;
+	tc.t_stopc = _POSIX_VDISABLE;
+#else
+	tmp_tc.c_iflag &= ~(IXOFF|IXON);	/* Leave the IXANY bit alone */
+    } else {
+	if (restartany < 0) {
+		tmp_tc.c_iflag |= IXOFF|IXON;	/* Leave the IXANY bit alone */
+	} else if (restartany > 0) {
+		tmp_tc.c_iflag |= IXOFF|IXON|IXANY;
+	} else {
+		tmp_tc.c_iflag |= IXOFF|IXON;
+		tmp_tc.c_iflag &= ~IXANY;
+	}
+#endif
+    }
+
+    if ((f&MODE_TRAPSIG) == 0) {
+#ifndef	USE_TERMIO
+	tc.t_intrc = _POSIX_VDISABLE;
+	tc.t_quitc = _POSIX_VDISABLE;
+	tc.t_eofc = _POSIX_VDISABLE;
+	ltc.t_suspc = _POSIX_VDISABLE;
+	ltc.t_dsuspc = _POSIX_VDISABLE;
+#else
+	tmp_tc.c_lflag &= ~ISIG;
+#endif
+	localchars = 0;
+    } else {
+#ifdef	USE_TERMIO
+	tmp_tc.c_lflag |= ISIG;
+#endif
+	localchars = 1;
+    }
+
+    if (f&MODE_EDIT) {
+#ifndef	USE_TERMIO
+	sb.sg_flags &= ~CBREAK;
+	sb.sg_flags |= CRMOD;
+#else
+	tmp_tc.c_lflag |= ICANON;
+#endif
+    } else {
+#ifndef	USE_TERMIO
+	sb.sg_flags |= CBREAK;
+	if (f&MODE_ECHO)
+	    sb.sg_flags |= CRMOD;
+	else
+	    sb.sg_flags &= ~CRMOD;
+#else
+	tmp_tc.c_lflag &= ~ICANON;
+	tmp_tc.c_iflag &= ~ICRNL;
+	tmp_tc.c_cc[VMIN] = 1;
+	tmp_tc.c_cc[VTIME] = 0;
+#endif
+    }
+
+    if ((f&(MODE_EDIT|MODE_TRAPSIG)) == 0) {
+#ifndef	USE_TERMIO
+	ltc.t_lnextc = _POSIX_VDISABLE;
+#else
+# ifdef VLNEXT
+	tmp_tc.c_cc[VLNEXT] = (cc_t)(_POSIX_VDISABLE);
+# endif
+#endif
+    }
+
+    if (f&MODE_SOFT_TAB) {
+#ifndef USE_TERMIO
+	sb.sg_flags |= XTABS;
+#else
+# ifdef	OXTABS
+	tmp_tc.c_oflag |= OXTABS;
+# endif
+# ifdef	TABDLY
+	tmp_tc.c_oflag &= ~TABDLY;
+	tmp_tc.c_oflag |= TAB3;
+# endif
+#endif
+    } else {
+#ifndef USE_TERMIO
+	sb.sg_flags &= ~XTABS;
+#else
+# ifdef	OXTABS
+	tmp_tc.c_oflag &= ~OXTABS;
+# endif
+# ifdef	TABDLY
+	tmp_tc.c_oflag &= ~TABDLY;
+# endif
+#endif
+    }
+
+    if (f&MODE_LIT_ECHO) {
+#ifndef USE_TERMIO
+	lmode &= ~LCTLECH;
+#else
+# ifdef	ECHOCTL
+	tmp_tc.c_lflag &= ~ECHOCTL;
+# endif
+#endif
+    } else {
+#ifndef USE_TERMIO
+	lmode |= LCTLECH;
+#else
+# ifdef	ECHOCTL
+	tmp_tc.c_lflag |= ECHOCTL;
+# endif
+#endif
+    }
+
+    if (f == -1) {
+	onoff = 0;
+    } else {
+#ifndef	USE_TERMIO
+	if (f & MODE_OUTBIN)
+		lmode |= LLITOUT;
+	else
+		lmode &= ~LLITOUT;
+
+	if (f & MODE_INBIN)
+		lmode |= LPASS8;
+	else
+		lmode &= ~LPASS8;
+#else
+	if (f & MODE_INBIN)
+		tmp_tc.c_iflag &= ~ISTRIP;
+	else
+		tmp_tc.c_iflag |= ISTRIP;
+	if (f & MODE_OUTBIN) {
+		tmp_tc.c_cflag &= ~(CSIZE|PARENB);
+		tmp_tc.c_cflag |= CS8;
+		tmp_tc.c_oflag &= ~OPOST;
+	} else {
+		tmp_tc.c_cflag &= ~(CSIZE|PARENB);
+		tmp_tc.c_cflag |= old_tc.c_cflag & (CSIZE|PARENB);
+		tmp_tc.c_oflag |= OPOST;
+	}
+#endif
+	onoff = 1;
+    }
+
+    if (f != -1) {
+#ifdef	SIGTSTP
+	SIG_FUNC_RET susp();
+#endif	/* SIGTSTP */
+#ifdef	SIGINFO
+	SIG_FUNC_RET ayt();
+#endif
+
+#ifdef	SIGTSTP
+	(void) signal(SIGTSTP, susp);
+#endif	/* SIGTSTP */
+#ifdef	SIGINFO
+	(void) signal(SIGINFO, ayt);
+#endif
+#if	defined(USE_TERMIO) && defined(NOKERNINFO)
+	tmp_tc.c_lflag |= NOKERNINFO;
+#endif
+	/*
+	 * We don't want to process ^Y here.  It's just another
+	 * character that we'll pass on to the back end.  It has
+	 * to process it because it will be processed when the
+	 * user attempts to read it, not when we send it.
+	 */
+#ifndef	USE_TERMIO
+	ltc.t_dsuspc = _POSIX_VDISABLE;
+#else
+# ifdef	VDSUSP
+	tmp_tc.c_cc[VDSUSP] = (cc_t)(_POSIX_VDISABLE);
+# endif
+#endif
+#ifdef	USE_TERMIO
+	/*
+	 * If the VEOL character is already set, then use VEOL2,
+	 * otherwise use VEOL.
+	 */
+	esc = (rlogin != _POSIX_VDISABLE) ? rlogin : escape;
+	if ((tmp_tc.c_cc[VEOL] != esc)
+# ifdef	VEOL2
+	    && (tmp_tc.c_cc[VEOL2] != esc)
+# endif
+	    ) {
+		if (tmp_tc.c_cc[VEOL] == (cc_t)(_POSIX_VDISABLE))
+		    tmp_tc.c_cc[VEOL] = esc;
+# ifdef	VEOL2
+		else if (tmp_tc.c_cc[VEOL2] == (cc_t)(_POSIX_VDISABLE))
+		    tmp_tc.c_cc[VEOL2] = esc;
+# endif
+	}
+#else
+	if (tc.t_brkc == (cc_t)(_POSIX_VDISABLE))
+		tc.t_brkc = esc;
+#endif
+    } else {
+#ifdef	SIGINFO
+	SIG_FUNC_RET ayt_status();
+
+	(void) signal(SIGINFO, ayt_status);
+#endif
+#ifdef	SIGTSTP
+	(void) signal(SIGTSTP, SIG_DFL);
+# ifndef SOLARIS
+	(void) sigsetmask(sigblock(0) & ~(1<<(SIGTSTP-1)));
+# else	SOLARIS
+	(void) sigrelse(SIGTSTP);
+# endif	SOLARIS
+#endif	/* SIGTSTP */
+#ifndef USE_TERMIO
+	ltc = oltc;
+	tc = otc;
+	sb = ottyb;
+	lmode = olmode;
+#else
+	tmp_tc = old_tc;
+#endif
+    }
+#ifndef USE_TERMIO
+    ioctl(tin, TIOCLSET, (char *)&lmode);
+    ioctl(tin, TIOCSLTC, (char *)&ltc);
+    ioctl(tin, TIOCSETC, (char *)&tc);
+    ioctl(tin, TIOCSETN, (char *)&sb);
+#else
+    if (tcsetattr(tin, TCSADRAIN, &tmp_tc) < 0)
+	tcsetattr(tin, TCSANOW, &tmp_tc);
+#endif
+
+#if	(!defined(TN3270)) || ((!defined(NOT43)) || defined(PUTCHAR))
+# if	!defined(sysV88)
+    ioctl(tin, FIONBIO, (char *)&onoff);
+    ioctl(tout, FIONBIO, (char *)&onoff);
+# endif
+#endif	/* (!defined(TN3270)) || ((!defined(NOT43)) || defined(PUTCHAR)) */
+#if	defined(TN3270)
+    if (noasynchtty == 0) {
+	ioctl(tin, FIOASYNC, (char *)&onoff);
+    }
+#endif	/* defined(TN3270) */
+
+}
+
+/*
+ * Try to guess whether speeds are "encoded" (4.2BSD) or just numeric (4.4BSD).
+ */
+#if B4800 != 4800
+#define	DECODE_BAUD
+#endif
+
+#ifdef	DECODE_BAUD
+#ifndef	B7200
+#define B7200   B4800
+#endif
+
+#ifndef	B14400
+#define B14400  B9600
+#endif
+
+#ifndef	B19200
+# define B19200 B14400
+#endif
+
+#ifndef	B28800
+#define B28800  B19200
+#endif
+
+#ifndef	B38400
+# define B38400 B28800
+#endif
+
+#ifndef B57600
+#define B57600  B38400
+#endif
+
+#ifndef B76800
+#define B76800  B57600
+#endif
+
+#ifndef B115200
+#define B115200 B76800
+#endif
+
+#ifndef B230400
+#define B230400 B115200
+#endif
+
+
+/*
+ * This code assumes that the values B0, B50, B75...
+ * are in ascending order.  They do not have to be
+ * contiguous.
+ */
+struct termspeeds {
+	long speed;
+	long value;
+} termspeeds[] = {
+	{ 0,      B0 },      { 50,    B50 },    { 75,     B75 },
+	{ 110,    B110 },    { 134,   B134 },   { 150,    B150 },
+	{ 200,    B200 },    { 300,   B300 },   { 600,    B600 },
+	{ 1200,   B1200 },   { 1800,  B1800 },  { 2400,   B2400 },
+	{ 4800,   B4800 },   { 7200,  B7200 },  { 9600,   B9600 },
+	{ 14400,  B14400 },  { 19200, B19200 }, { 28800,  B28800 },
+	{ 38400,  B38400 },  { 57600, B57600 }, { 115200, B115200 },
+	{ 230400, B230400 }, { -1,    B230400 }
+};
+#endif	/* DECODE_BAUD */
+
+    void
+TerminalSpeeds(ispeed, ospeed)
+    long *ispeed;
+    long *ospeed;
+{
+#ifdef	DECODE_BAUD
+    register struct termspeeds *tp;
+#endif	/* DECODE_BAUD */
+    register long in, out;
+
+    out = cfgetospeed(&old_tc);
+    in = cfgetispeed(&old_tc);
+    if (in == 0)
+	in = out;
+
+#ifdef	DECODE_BAUD
+    tp = termspeeds;
+    while ((tp->speed != -1) && (tp->value < in))
+	tp++;
+    *ispeed = tp->speed;
+
+    tp = termspeeds;
+    while ((tp->speed != -1) && (tp->value < out))
+	tp++;
+    *ospeed = tp->speed;
+#else	/* DECODE_BAUD */
+	*ispeed = in;
+	*ospeed = out;
+#endif	/* DECODE_BAUD */
+}
+
+    int
+TerminalWindowSize(rows, cols)
+    long *rows, *cols;
+{
+#ifdef	TIOCGWINSZ
+    struct winsize ws;
+
+    if (ioctl(fileno(stdin), TIOCGWINSZ, (char *)&ws) >= 0) {
+	*rows = ws.ws_row;
+	*cols = ws.ws_col;
+	return 1;
+    }
+#endif	/* TIOCGWINSZ */
+    return 0;
+}
+
+    int
+NetClose(fd)
+    int	fd;
+{
+    return close(fd);
+}
+
+
+    void
+NetNonblockingIO(fd, onoff)
+    int fd;
+    int onoff;
+{
+    ioctl(fd, FIONBIO, (char *)&onoff);
+}
+
+#if	defined(TN3270)
+    void
+NetSigIO(fd, onoff)
+    int fd;
+    int onoff;
+{
+    ioctl(fd, FIOASYNC, (char *)&onoff);	/* hear about input */
+}
+
+    void
+NetSetPgrp(fd)
+    int fd;
+{
+    int myPid;
+
+    myPid = getpid();
+    fcntl(fd, F_SETOWN, myPid);
+}
+#endif	/*defined(TN3270)*/
+
+/*
+ * Various signal handling routines.
+ */
+
+    /* ARGSUSED */
+    SIG_FUNC_RET
+deadpeer(sig)
+    int sig;
+{
+	setcommandmode();
+	longjmp(peerdied, -1);
+}
+
+    /* ARGSUSED */
+    SIG_FUNC_RET
+intr(sig)
+    int sig;
+{
+    if (localchars) {
+	intp();
+	return;
+    }
+    setcommandmode();
+    longjmp(toplevel, -1);
+}
+
+    /* ARGSUSED */
+    SIG_FUNC_RET
+intr2(sig)
+    int sig;
+{
+    if (localchars) {
+#ifdef	KLUDGELINEMODE
+	if (kludgelinemode)
+	    sendbrk();
+	else
+#endif
+	    sendabort();
+	return;
+    }
+}
+
+#ifdef	SIGTSTP
+    /* ARGSUSED */
+    SIG_FUNC_RET
+susp(sig)
+    int sig;
+{
+    if ((rlogin != _POSIX_VDISABLE) && rlogin_susp())
+	return;
+    if (localchars)
+	sendsusp();
+}
+#endif
+
+#ifdef	SIGWINCH
+    /* ARGSUSED */
+    SIG_FUNC_RET
+sendwin(sig)
+    int sig;
+{
+    if (connected) {
+	sendnaws();
+    }
+}
+#endif
+
+#ifdef	SIGINFO
+    /* ARGSUSED */
+    SIG_FUNC_RET
+ayt(sig)
+    int sig;
+{
+    if (connected)
+	sendayt();
+    else
+	ayt_status();
+}
+#endif
+
+
+    void
+sys_telnet_init()
+{
+    (void) signal(SIGINT, intr);
+    (void) signal(SIGQUIT, intr2);
+    (void) signal(SIGPIPE, deadpeer);
+#ifdef	SIGWINCH
+    (void) signal(SIGWINCH, sendwin);
+#endif
+#ifdef	SIGTSTP
+    (void) signal(SIGTSTP, susp);
+#endif
+#ifdef	SIGINFO
+    (void) signal(SIGINFO, ayt);
+#endif
+
+    setconnmode(0);
+
+    NetNonblockingIO(net, 1);
+
+#if	defined(TN3270)
+    if (noasynchnet == 0) {			/* DBX can't handle! */
+	NetSigIO(net, 1);
+	NetSetPgrp(net);
+    }
+#endif	/* defined(TN3270) */
+
+#if	defined(SO_OOBINLINE)
+    if (SetSockOpt(net, SOL_SOCKET, SO_OOBINLINE, 1) == -1) {
+	perror("SetSockOpt");
+    }
+#endif	/* defined(SO_OOBINLINE) */
+}
+
+/*
+ * Process rings -
+ *
+ *	This routine tries to fill up/empty our various rings.
+ *
+ *	The parameter specifies whether this is a poll operation,
+ *	or a block-until-something-happens operation.
+ *
+ *	The return value is 1 if something happened, 0 if not.
+ */
+
+    int
+process_rings(netin, netout, netex, ttyin, ttyout, poll)
+    int poll;		/* If 0, then block until something to do */
+{
+    register int c;
+		/* One wants to be a bit careful about setting returnValue
+		 * to one, since a one implies we did some useful work,
+		 * and therefore probably won't be called to block next
+		 * time (TN3270 mode only).
+		 */
+    int returnValue = 0;
+    static struct timeval TimeValue = { 0 };
+
+    if (netout) {
+	FD_SET(net, &obits);
+    }
+    if (ttyout) {
+	FD_SET(tout, &obits);
+    }
+#if	defined(TN3270)
+    if (ttyin) {
+	FD_SET(tin, &ibits);
+    }
+#else	/* defined(TN3270) */
+    if (ttyin) {
+	FD_SET(tin, &ibits);
+    }
+#endif	/* defined(TN3270) */
+#if	defined(TN3270)
+    if (netin) {
+	FD_SET(net, &ibits);
+    }
+#   else /* !defined(TN3270) */
+    if (netin) {
+	FD_SET(net, &ibits);
+    }
+#   endif /* !defined(TN3270) */
+    if (netex) {
+	FD_SET(net, &xbits);
+    }
+    if ((c = select(16, &ibits, &obits, &xbits,
+			(poll == 0)? (struct timeval *)0 : &TimeValue)) < 0) {
+	if (c == -1) {
+		    /*
+		     * we can get EINTR if we are in line mode,
+		     * and the user does an escape (TSTP), or
+		     * some other signal generator.
+		     */
+	    if (errno == EINTR) {
+		return 0;
+	    }
+#	    if defined(TN3270)
+		    /*
+		     * we can get EBADF if we were in transparent
+		     * mode, and the transcom process died.
+		    */
+	    if (errno == EBADF) {
+			/*
+			 * zero the bits (even though kernel does it)
+			 * to make sure we are selecting on the right
+			 * ones.
+			*/
+		FD_ZERO(&ibits);
+		FD_ZERO(&obits);
+		FD_ZERO(&xbits);
+		return 0;
+	    }
+#	    endif /* defined(TN3270) */
+		    /* I don't like this, does it ever happen? */
+	    printf("sleep(5) from telnet, after select\r\n");
+	    sleep(5);
+	}
+	return 0;
+    }
+
+    /*
+     * Any urgent data?
+     */
+    if (FD_ISSET(net, &xbits)) {
+	FD_CLR(net, &xbits);
+	SYNCHing = 1;
+	(void) ttyflush(1);	/* flush already enqueued data */
+    }
+
+    /*
+     * Something to read from the network...
+     */
+    if (FD_ISSET(net, &ibits)) {
+	int canread;
+
+	FD_CLR(net, &ibits);
+	canread = ring_empty_consecutive(&netiring);
+#if	!defined(SO_OOBINLINE)
+	    /*
+	     * In 4.2 (and some early 4.3) systems, the
+	     * OOB indication and data handling in the kernel
+	     * is such that if two separate TCP Urgent requests
+	     * come in, one byte of TCP data will be overlaid.
+	     * This is fatal for Telnet, but we try to live
+	     * with it.
+	     *
+	     * In addition, in 4.2 (and...), a special protocol
+	     * is needed to pick up the TCP Urgent data in
+	     * the correct sequence.
+	     *
+	     * What we do is:  if we think we are in urgent
+	     * mode, we look to see if we are "at the mark".
+	     * If we are, we do an OOB receive.  If we run
+	     * this twice, we will do the OOB receive twice,
+	     * but the second will fail, since the second
+	     * time we were "at the mark", but there wasn't
+	     * any data there (the kernel doesn't reset
+	     * "at the mark" until we do a normal read).
+	     * Once we've read the OOB data, we go ahead
+	     * and do normal reads.
+	     *
+	     * There is also another problem, which is that
+	     * since the OOB byte we read doesn't put us
+	     * out of OOB state, and since that byte is most
+	     * likely the TELNET DM (data mark), we would
+	     * stay in the TELNET SYNCH (SYNCHing) state.
+	     * So, clocks to the rescue.  If we've "just"
+	     * received a DM, then we test for the
+	     * presence of OOB data when the receive OOB
+	     * fails (and AFTER we did the normal mode read
+	     * to clear "at the mark").
+	     */
+	if (SYNCHing) {
+	    int atmark;
+	    static int bogus_oob = 0, first = 1;
+
+	    ioctl(net, SIOCATMARK, (char *)&atmark);
+	    if (atmark) {
+		c = recv(net, netiring.supply, canread, MSG_OOB);
+		if ((c == -1) && (errno == EINVAL)) {
+		    c = recv(net, netiring.supply, canread, 0);
+		    if (clocks.didnetreceive < clocks.gotDM) {
+			SYNCHing = stilloob(net);
+		    }
+		} else if (first && c > 0) {
+		    /*
+		     * Bogosity check.  Systems based on 4.2BSD
+		     * do not return an error if you do a second
+		     * recv(MSG_OOB).  So, we do one.  If it
+		     * succeeds and returns exactly the same
+		     * data, then assume that we are running
+		     * on a broken system and set the bogus_oob
+		     * flag.  (If the data was different, then
+		     * we probably got some valid new data, so
+		     * increment the count...)
+		     */
+		    int i;
+		    i = recv(net, netiring.supply + c, canread - c, MSG_OOB);
+		    if (i == c &&
+			 memcmp(netiring.supply, netiring.supply + c, i) == 0) {
+			bogus_oob = 1;
+			first = 0;
+		    } else if (i < 0) {
+			bogus_oob = 0;
+			first = 0;
+		    } else
+			c += i;
+		}
+		if (bogus_oob && c > 0) {
+		    int i;
+		    /*
+		     * Bogosity.  We have to do the read
+		     * to clear the atmark to get out of
+		     * an infinate loop.
+		     */
+		    i = read(net, netiring.supply + c, canread - c);
+		    if (i > 0)
+			c += i;
+		}
+	    } else {
+		c = recv(net, netiring.supply, canread, 0);
+	    }
+	} else {
+	    c = recv(net, netiring.supply, canread, 0);
+	}
+	settimer(didnetreceive);
+#else	/* !defined(SO_OOBINLINE) */
+	c = recv(net, (char *)netiring.supply, canread, 0);
+#endif	/* !defined(SO_OOBINLINE) */
+	if (c < 0 && errno == EWOULDBLOCK) {
+	    c = 0;
+	} else if (c <= 0) {
+	    return -1;
+	}
+	if (netdata) {
+	    Dump('<', netiring.supply, c);
+	}
+	if (c)
+	    ring_supplied(&netiring, c);
+	returnValue = 1;
+    }
+
+    /*
+     * Something to read from the tty...
+     */
+    if (FD_ISSET(tin, &ibits)) {
+	FD_CLR(tin, &ibits);
+	c = TerminalRead(ttyiring.supply, ring_empty_consecutive(&ttyiring));
+	if (c < 0 && errno == EIO)
+	    c = 0;
+	if (c < 0 && errno == EWOULDBLOCK) {
+	    c = 0;
+	} else {
+	    /* EOF detection for line mode!!!! */
+	    if ((c == 0) && MODE_LOCAL_CHARS(globalmode) && isatty(tin)) {
+			/* must be an EOF... */
+		*ttyiring.supply = termEofChar;
+		c = 1;
+	    }
+	    if (c <= 0) {
+		return -1;
+	    }
+	    if (termdata) {
+		Dump('<', ttyiring.supply, c);
+	    }
+	    ring_supplied(&ttyiring, c);
+	}
+	returnValue = 1;		/* did something useful */
+    }
+
+    if (FD_ISSET(net, &obits)) {
+	FD_CLR(net, &obits);
+	returnValue |= netflush();
+    }
+    if (FD_ISSET(tout, &obits)) {
+	FD_CLR(tout, &obits);
+	returnValue |= (ttyflush(SYNCHing|flushout) > 0);
+    }
+
+    return returnValue;
+}
diff --git a/contrib/telnet/telnet/telnet.1 b/contrib/telnet/telnet/telnet.1
new file mode 100644
index 0000000..b996fea
--- /dev/null
+++ b/contrib/telnet/telnet/telnet.1
@@ -0,0 +1,1366 @@
+.\" Copyright (c) 1983, 1990, 1993
+.\"	The Regents of the University of California.  All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"	This product includes software developed by the University of
+.\"	California, Berkeley and its contributors.
+.\" 4. Neither the name of the University nor the names of its contributors
+.\"    may be used to endorse or promote products derived from this software
+.\"    without specific prior written permission.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\"	@(#)telnet.1	8.6 (Berkeley) 6/1/94
+.\"
+.Dd June 1, 1994
+.Dt TELNET 1
+.Os BSD 4.2
+.Sh NAME
+.Nm telnet
+.Nd user interface to the 
+.Tn TELNET
+protocol
+.Sh SYNOPSIS
+.Nm telnet
+.Op Fl 8EFKLacdfrx
+.Op Fl S Ar tos
+.Op Fl X Ar authtype
+.Op Fl e Ar escapechar
+.Op Fl k Ar realm
+.Op Fl l Ar user
+.Op Fl n Ar tracefile
+.Oo
+.Ar host
+.Op port
+.Oc
+.Sh DESCRIPTION
+The
+.Nm telnet
+command
+is used to communicate with another host using the 
+.Tn TELNET
+protocol.
+If
+.Nm telnet
+is invoked without the
+.Ar host
+argument, it enters command mode,
+indicated by its prompt
+.Pq Nm telnet\&> .
+In this mode, it accepts and executes the commands listed below.
+If it is invoked with arguments, it performs an
+.Ic open
+command with those arguments.
+.Pp
+Options:
+.Bl -tag -width indent
+.It Fl 8
+Specifies an 8-bit data path.  This causes an attempt to
+negotiate the
+.Dv TELNET BINARY
+option on both input and output.
+.It Fl E
+Stops any character from being recognized as an escape character.
+.It Fl F
+If Kerberos V5 authentication is being used, the
+.Fl F
+option allows the local credentials to be forwarded
+to the remote system, including any credentials that
+have already been forwarded into the local environment.
+.It Fl K
+Specifies no automatic login to the remote system.
+.It Fl L
+Specifies an 8-bit data path on output.  This causes the
+BINARY option to be negotiated on output.
+.It Fl S Ar tos
+Sets the IP type-of-service (TOS) option for the telnet
+connection to the value
+.Ar tos,
+which can be a numeric TOS value
+or, on systems that support it, a symbolic
+TOS name found in the /etc/iptos file.
+.It Fl X Ar atype 
+Disables the
+.Ar atype
+type of authentication.
+.It Fl a
+Attempt automatic login.
+Currently, this sends the user name via the
+.Ev USER
+variable
+of the
+.Ev ENVIRON
+option if supported by the remote system.
+The name used is that of the current user as returned by
+.Xr getlogin 2
+if it agrees with the current user ID,
+otherwise it is the name associated with the user ID.
+.It Fl c
+Disables the reading of the user's
+.Pa \&.telnetrc
+file.  (See the
+.Ic toggle skiprc
+command on this man page.)
+.It Fl d
+Sets the initial value of the
+.Ic debug
+toggle to
+.Dv TRUE
+.It Fl e Ar escape char 
+Sets the initial
+.Nm
+.Nm telnet
+escape character to
+.Ar escape char.
+If
+.Ar escape char
+is omitted, then
+there will be no escape character.
+.It Fl f
+If Kerberos V5 authentication is being used, the
+.Fl f
+option allows the local credentials to be forwarded to the remote system.
+.ne 1i
+.It Fl k Ar realm
+If Kerberos authentication is being used, the
+.Fl k
+option requests that telnet obtain tickets for the remote host in
+realm realm instead of the remote host's realm, as determined
+by
+.Xr krb_realmofhost 3 .
+.It Fl l Ar user 
+When connecting to the remote system, if the remote system
+understands the
+.Ev ENVIRON
+option, then
+.Ar user
+will be sent to the remote system as the value for the variable USER.
+This option implies the
+.Fl a
+option.
+This option may also be used with the
+.Ic open
+command.
+.It Fl n Ar tracefile 
+Opens
+.Ar tracefile
+for recording trace information.
+See the
+.Ic set tracefile
+command below.
+.It Fl r
+Specifies a user interface similar to
+.Xr rlogin 1 .
+In this
+mode, the escape character is set to the tilde (~) character,
+unless modified by the -e option.
+.It Fl x
+Turns on encryption of the data stream if possible.  This
+option is not available outside of the United States and
+Canada.
+.It Ar host
+Indicates the official name, an alias, or the Internet address
+of a remote host.
+.It Ar port
+Indicates a port number (address of an application).  If a number is
+not specified, the default
+.Nm telnet
+port is used.
+.El
+.Pp
+When in rlogin mode, a line of the form ~.  disconnects from the
+remote host; ~ is the telnet escape character.
+Similarly, the line ~^Z suspends the telnet session.
+The line ~^] escapes to the normal telnet escape prompt.
+.Pp
+Once a connection has been opened,
+.Nm telnet
+will attempt to enable the
+.Dv TELNET LINEMODE
+option.
+If this fails, then
+.Nm telnet
+will revert to one of two input modes:
+either \*(Lqcharacter at a time\*(Rq
+or \*(Lqold line by line\*(Rq
+depending on what the remote system supports.
+.Pp
+When 
+.Dv LINEMODE
+is enabled, character processing is done on the
+local system, under the control of the remote system.  When input
+editing or character echoing is to be disabled, the remote system
+will relay that information.  The remote system will also relay
+changes to any special characters that happen on the remote
+system, so that they can take effect on the local system.
+.Pp
+In \*(Lqcharacter at a time\*(Rq mode, most
+text typed is immediately sent to the remote host for processing.
+.Pp
+In \*(Lqold line by line\*(Rq mode, all text is echoed locally,
+and (normally) only completed lines are sent to the remote host.
+The \*(Lqlocal echo character\*(Rq (initially \*(Lq^E\*(Rq) may be used
+to turn off and on the local echo
+(this would mostly be used to enter passwords
+without the password being echoed).
+.Pp
+If the 
+.Dv LINEMODE
+option is enabled, or if the
+.Ic localchars
+toggle is
+.Dv TRUE
+(the default for \*(Lqold line by line\*(Lq; see below),
+the user's
+.Ic quit  ,
+.Ic intr ,
+and
+.Ic flush
+characters are trapped locally, and sent as
+.Tn TELNET
+protocol sequences to the remote side.
+If 
+.Dv LINEMODE
+has ever been enabled, then the user's
+.Ic susp
+and
+.Ic eof
+are also sent as
+.Tn TELNET
+protocol sequences,
+and
+.Ic quit
+is sent as a 
+.Dv TELNET ABORT
+instead of 
+.Dv BREAK
+There are options (see
+.Ic toggle
+.Ic autoflush
+and
+.Ic toggle
+.Ic autosynch
+below)
+which cause this action to flush subsequent output to the terminal
+(until the remote host acknowledges the
+.Tn TELNET
+sequence) and flush previous terminal input
+(in the case of
+.Ic quit
+and
+.Ic intr  ) .
+.Pp
+While connected to a remote host,
+.Nm telnet
+command mode may be entered by typing the
+.Nm telnet
+\*(Lqescape character\*(Rq (initially \*(Lq^]\*(Rq).
+When in command mode, the normal terminal editing conventions are available.
+.Pp
+The following
+.Nm telnet
+commands are available.
+Only enough of each command to uniquely identify it need be typed
+(this is also true for arguments to the
+.Ic mode  ,
+.Ic set ,
+.Ic toggle  ,
+.Ic unset ,
+.Ic slc  ,
+.Ic environ ,
+and
+.Ic display
+commands).
+.Pp
+.Bl -tag -width "mode type"
+.It Ic auth Ar argument ... 
+The auth command manipulates the information sent through the
+.Dv TELNET AUTHENTICATE
+option.  Valid arguments for the
+auth command are as follows:
+.Bl -tag -width "disable type"
+.It Ic disable Ar type
+Disables the specified type of authentication.  To
+obtain a list of available types, use the
+.Ic auth disable \&?
+command.
+.It Ic enable Ar type
+Enables the specified type of authentication.  To
+obtain a list of available types, use the
+.Ic auth enable \&?
+command.
+.It Ic status
+Lists the current status of the various types of
+authentication.
+.El
+.It Ic close
+Close a
+.Tn TELNET
+session and return to command mode.
+.It Ic display Ar argument ... 
+Displays all, or some, of the
+.Ic set
+and
+.Ic toggle
+values (see below).
+.It Ic encrypt Ar argument ...
+The encrypt command manipulates the information sent through the
+.Dv TELNET ENCRYPT
+option.
+.Pp
+Note:  Because of export controls, the
+.Dv TELNET ENCRYPT
+option is not supported outside of the United States and Canada.
+.Pp
+Valid arguments for the encrypt command are as follows:
+.Bl -tag -width Ar
+.It Ic disable Ar type Ic [input|output]
+Disables the specified type of encryption.  If you
+omit the input and output, both input and output
+are disabled.  To obtain a list of available
+types, use the
+.Ic encrypt disable \&?
+command.
+.It Ic enable Ar type Ic [input|output]
+Enables the specified type of encryption.  If you
+omit input and output, both input and output are
+enabled.  To obtain a list of available types, use the
+.Ic encrypt enable \&?
+command.
+.It Ic input
+This is the same as the
+.Ic encrypt start input
+command.
+.It Ic -input
+This is the same as the
+.Ic encrypt stop input
+command.
+.It Ic output
+This is the same as the
+.Ic encrypt start output
+command.
+.It Ic -output
+This is the same as the
+.Ic encrypt stop output
+command.
+.It Ic start Ic [input|output]
+Attempts to start encryption.  If you omit
+.Ic input
+and
+.Ic output,
+both input and output are enabled.  To
+obtain a list of available types, use the
+.Ic encrypt enable \&?
+command.
+.It Ic status
+Lists the current status of encryption.
+.It Ic stop Ic [input|output]
+Stops encryption.  If you omit input and output,
+encryption is on both input and output.
+.It Ic type Ar type
+Sets the default type of encryption to be used
+with later
+.Ic encrypt start
+or
+.Ic encrypt stop
+commands.
+.El
+.It Ic environ Ar arguments... 
+The
+.Ic environ
+command is used to manipulate the
+the variables that my be sent through the
+.Dv TELNET ENVIRON
+option.
+The initial set of variables is taken from the users
+environment, with only the
+.Ev DISPLAY
+and
+.Ev PRINTER
+variables being exported by default.
+The
+.Ev USER
+variable is also exported if the
+.Fl a
+or
+.Fl l
+options are used.
+.br
+Valid arguments for the
+.Ic environ
+command are:
+.Bl -tag -width Fl
+.It Ic define Ar variable value 
+Define the variable
+.Ar variable
+to have a value of
+.Ar value.
+Any variables defined by this command are automatically exported.
+The
+.Ar value
+may be enclosed in single or double quotes so
+that tabs and spaces may be included.
+.It Ic undefine Ar variable 
+Remove
+.Ar variable
+from the list of environment variables.
+.It Ic export Ar variable 
+Mark the variable
+.Ar variable
+to be exported to the remote side.
+.It Ic unexport Ar variable 
+Mark the variable
+.Ar variable
+to not be exported unless
+explicitly asked for by the remote side.
+.It Ic list
+List the current set of environment variables.
+Those marked with a
+.Cm *
+will be sent automatically,
+other variables will only be sent if explicitly requested.
+.It Ic \&?
+Prints out help information for the
+.Ic environ
+command.
+.El
+.It Ic logout
+Sends the
+.Dv TELNET LOGOUT
+option to the remote side.
+This command is similar to a
+.Ic close
+command; however, if the remote side does not support the
+.Dv LOGOUT
+option, nothing happens.
+If, however, the remote side does support the
+.Dv LOGOUT
+option, this command should cause the remote side to close the
+.Tn TELNET
+connection.
+If the remote side also supports the concept of
+suspending a user's session for later reattachment,
+the logout argument indicates that you
+should terminate the session immediately.
+.It Ic mode Ar type 
+.Ar Type
+is one of several options, depending on the state of the
+.Tn TELNET
+session.
+The remote host is asked for permission to go into the requested mode.
+If the remote host is capable of entering that mode, the requested
+mode will be entered.
+.Bl -tag -width Ar
+.It Ic character
+Disable the
+.Dv TELNET LINEMODE
+option, or, if the remote side does not understand the
+.Dv LINEMODE
+option, then enter \*(Lqcharacter at a time\*(Lq mode.
+.It Ic line
+Enable the
+.Dv TELNET LINEMODE
+option, or, if the remote side does not understand the
+.Dv LINEMODE
+option, then attempt to enter \*(Lqold-line-by-line\*(Lq mode.
+.It Ic isig Pq Ic \-isig 
+Attempt to enable (disable) the 
+.Dv TRAPSIG
+mode of the 
+.Dv LINEMODE
+option.
+This requires that the 
+.Dv LINEMODE
+option be enabled.
+.It Ic edit Pq Ic \-edit 
+Attempt to enable (disable) the 
+.Dv EDIT
+mode of the 
+.Dv LINEMODE
+option.
+This requires that the 
+.Dv LINEMODE
+option be enabled.
+.It Ic softtabs Pq Ic \-softtabs 
+Attempt to enable (disable) the 
+.Dv SOFT_TAB
+mode of the 
+.Dv LINEMODE
+option.
+This requires that the 
+.Dv LINEMODE
+option be enabled.
+.ne 1i
+.It Ic litecho Pq Ic \-litecho 
+Attempt to enable (disable) the 
+.Dv LIT_ECHO
+mode of the 
+.Dv LINEMODE
+option.
+This requires that the 
+.Dv LINEMODE
+option be enabled.
+.It Ic \&?
+Prints out help information for the
+.Ic mode
+command.
+.El
+.It Xo
+.Ic open Ar host
+.Oo Op Fl l
+.Ar user
+.Oc Ns Oo Fl
+.Ar port Oc
+.Xc
+Open a connection to the named host.
+If no port number
+is specified,
+.Nm telnet
+will attempt to contact a
+.Tn TELNET
+server at the default port.
+The host specification may be either a host name (see
+.Xr hosts  5  )
+or an Internet address specified in the \*(Lqdot notation\*(Rq (see
+.Xr inet 3 ) .
+The
+.Op Fl l
+option may be used to specify the user name
+to be passed to the remote system via the
+.Ev ENVIRON
+option.
+When connecting to a non-standard port,
+.Nm telnet
+omits any automatic initiation of
+.Tn TELNET
+options.  When the port number is preceded by a minus sign,
+the initial option negotiation is done.
+After establishing a connection, the file
+.Pa \&.telnetrc
+in the
+users home directory is opened.  Lines beginning with a # are
+comment lines.  Blank lines are ignored.  Lines that begin
+without white space are the start of a machine entry.  The
+first thing on the line is the name of the machine that is
+being connected to.  The rest of the line, and successive
+lines that begin with white space are assumed to be
+.Nm telnet
+commands and are processed as if they had been typed
+in manually to the
+.Nm telnet
+command prompt.
+.It Ic quit
+Close any open
+.Tn TELNET
+session and exit
+.Nm telnet  .
+An end of file (in command mode) will also close a session and exit.
+.It Ic send Ar arguments 
+Sends one or more special character sequences to the remote host.
+The following are the arguments which may be specified
+(more than one argument may be specified at a time):
+.Pp
+.Bl -tag -width escape
+.It Ic abort
+Sends the
+.Dv TELNET ABORT
+(Abort
+processes)
+sequence.
+.It Ic ao
+Sends the
+.Dv TELNET AO
+(Abort Output) sequence, which should cause the remote system to flush
+all output
+.Em from
+the remote system
+.Em to
+the user's terminal.
+.It Ic ayt
+Sends the
+.Dv TELNET AYT
+(Are You There)
+sequence, to which the remote system may or may not choose to respond.
+.It Ic brk
+Sends the
+.Dv TELNET BRK
+(Break) sequence, which may have significance to the remote
+system.
+.It Ic ec
+Sends the
+.Dv TELNET EC
+(Erase Character)
+sequence, which should cause the remote system to erase the last character
+entered.
+.It Ic el
+Sends the
+.Dv TELNET EL
+(Erase Line)
+sequence, which should cause the remote system to erase the line currently
+being entered.
+.It Ic eof
+Sends the
+.Dv TELNET EOF
+(End Of File)
+sequence.
+.It Ic eor
+Sends the
+.Dv TELNET EOR
+(End of Record)
+sequence.
+.It Ic escape
+Sends the current
+.Nm telnet
+escape character (initially \*(Lq^\*(Rq).
+.It Ic ga
+Sends the
+.Dv TELNET GA
+(Go Ahead)
+sequence, which likely has no significance to the remote system.
+.It Ic getstatus
+If the remote side supports the
+.Dv TELNET STATUS
+command,
+.Ic getstatus
+will send the subnegotiation to request that the server send
+its current option status.
+.ne 1i
+.It Ic ip
+Sends the
+.Dv TELNET IP
+(Interrupt Process) sequence, which should cause the remote
+system to abort the currently running process.
+.It Ic nop
+Sends the
+.Dv TELNET NOP
+(No OPeration)
+sequence.
+.It Ic susp
+Sends the
+.Dv TELNET SUSP
+(SUSPend process)
+sequence.
+.It Ic synch
+Sends the
+.Dv TELNET SYNCH
+sequence.
+This sequence causes the remote system to discard all previously typed
+(but not yet read) input.
+This sequence is sent as
+.Tn TCP
+urgent
+data (and may not work if the remote system is a
+.Bx 4.2
+system -- if
+it doesn't work, a lower case \*(Lqr\*(Rq may be echoed on the terminal).
+.It Ic do Ar cmd
+.It Ic dont Ar cmd
+.It Ic will Ar cmd
+.It Ic wont Ar cmd
+Sends the
+.Dv TELNET DO
+.Ar cmd
+sequence.
+.Ar Cmd
+can be either a decimal number between 0 and 255,
+or a symbolic name for a specific
+.Dv TELNET
+command.
+.Ar Cmd
+can also be either
+.Ic help
+or
+.Ic \&?
+to print out help information, including
+a list of known symbolic names.
+.It Ic \&?
+Prints out help information for the
+.Ic send
+command.
+.El
+.It Ic set Ar argument value 
+.It Ic unset Ar argument value 
+The
+.Ic set
+command will set any one of a number of
+.Nm telnet
+variables to a specific value or to
+.Dv TRUE .
+The special value
+.Ic off
+turns off the function associated with
+the variable, this is equivalent to using the
+.Ic unset
+command.
+The
+.Ic unset
+command will disable or set to
+.Dv FALSE
+any of the specified functions.
+The values of variables may be interrogated with the
+.Ic display
+command.
+The variables which may be set or unset, but not toggled, are
+listed here.  In addition, any of the variables for the
+.Ic toggle
+command may be explicitly set or unset using
+the
+.Ic set
+and
+.Ic unset
+commands.
+.Bl -tag -width escape
+.It Ic ayt
+If
+.Tn TELNET
+is in localchars mode, or
+.Dv LINEMODE
+is enabled, and the status character is typed, a
+.Dv TELNET AYT
+sequence (see
+.Ic send ayt
+preceding) is sent to the
+remote host.  The initial value for the "Are You There"
+character is the terminal's status character.
+.It Ic echo
+This is the value (initially \*(Lq^E\*(Rq) which, when in
+\*(Lqline by line\*(Rq mode, toggles between doing local echoing
+of entered characters (for normal processing), and suppressing
+echoing of entered characters (for entering, say, a password).
+.It Ic eof
+If
+.Nm telnet
+is operating in
+.Dv LINEMODE
+or \*(Lqold line by line\*(Rq mode, entering this character
+as the first character on a line will cause this character to be
+sent to the remote system.
+The initial value of the eof character is taken to be the terminal's
+.Ic eof
+character.
+.It Ic erase
+If
+.Nm telnet
+is in
+.Ic localchars
+mode (see
+.Ic toggle
+.Ic localchars
+below),
+.Sy and
+if
+.Nm telnet
+is operating in \*(Lqcharacter at a time\*(Rq mode, then when this
+character is typed, a
+.Dv TELNET EC
+sequence (see
+.Ic send
+.Ic ec
+above)
+is sent to the remote system.
+The initial value for the erase character is taken to be
+the terminal's
+.Ic erase
+character.
+.It Ic escape
+This is the
+.Nm telnet
+escape character (initially \*(Lq^[\*(Rq) which causes entry
+into
+.Nm telnet
+command mode (when connected to a remote system).
+.It Ic flushoutput
+If
+.Nm telnet
+is in
+.Ic localchars
+mode (see
+.Ic toggle
+.Ic localchars
+below)
+and the
+.Ic flushoutput
+character is typed, a
+.Dv TELNET AO
+sequence (see
+.Ic send
+.Ic ao
+above)
+is sent to the remote host.
+The initial value for the flush character is taken to be
+the terminal's
+.Ic flush
+character.
+.It Ic forw1
+.It Ic forw2
+If
+.Tn TELNET
+is operating in
+.Dv LINEMODE ,
+these are the
+characters that, when typed, cause partial lines to be
+forwarded to the remote system.  The initial value for
+the forwarding characters are taken from the terminal's
+eol and eol2 characters.
+.It Ic interrupt
+If
+.Nm telnet
+is in
+.Ic localchars
+mode (see
+.Ic toggle
+.Ic localchars
+below)
+and the
+.Ic interrupt
+character is typed, a
+.Dv TELNET IP
+sequence (see
+.Ic send
+.Ic ip
+above)
+is sent to the remote host.
+The initial value for the interrupt character is taken to be
+the terminal's
+.Ic intr
+character.
+.It Ic kill
+If
+.Nm telnet
+is in
+.Ic localchars
+mode (see
+.Ic toggle
+.Ic localchars
+below),
+.Ic and
+if
+.Nm telnet
+is operating in \*(Lqcharacter at a time\*(Rq mode, then when this
+character is typed, a
+.Dv TELNET EL
+sequence (see
+.Ic send
+.Ic el
+above)
+is sent to the remote system.
+The initial value for the kill character is taken to be
+the terminal's
+.Ic kill
+character.
+.It Ic lnext
+If
+.Nm telnet
+is operating in
+.Dv LINEMODE
+or \*(Lqold line by line\*(Lq mode, then this character is taken to
+be the terminal's
+.Ic lnext
+character.
+The initial value for the lnext character is taken to be
+the terminal's
+.Ic lnext
+character.
+.It Ic quit
+If
+.Nm telnet
+is in
+.Ic localchars
+mode (see
+.Ic toggle
+.Ic localchars
+below)
+and the
+.Ic quit
+character is typed, a
+.Dv TELNET BRK
+sequence (see
+.Ic send
+.Ic brk
+above)
+is sent to the remote host.
+The initial value for the quit character is taken to be
+the terminal's
+.Ic quit
+character.
+.It Ic reprint
+If
+.Nm telnet
+is operating in
+.Dv LINEMODE
+or \*(Lqold line by line\*(Lq mode, then this character is taken to
+be the terminal's
+.Ic reprint
+character.
+The initial value for the reprint character is taken to be
+the terminal's
+.Ic reprint
+character.
+.It Ic rlogin
+This is the rlogin escape character.
+If set, the normal
+.Tn TELNET
+escape character is ignored unless it is
+preceded by this character at the beginning of a line.
+This character, at the beginning of a line followed by
+a "."  closes the connection; when followed by a ^Z it
+suspends the telnet command.  The initial state is to
+disable the rlogin escape character.
+.It Ic start
+If the
+.Dv TELNET TOGGLE-FLOW-CONTROL
+option has been enabled,
+then this character is taken to
+be the terminal's
+.Ic start
+character.
+The initial value for the kill character is taken to be
+the terminal's
+.Ic start
+character.
+.It Ic stop
+If the
+.Dv TELNET TOGGLE-FLOW-CONTROL
+option has been enabled,
+then this character is taken to
+be the terminal's
+.Ic stop
+character.
+The initial value for the kill character is taken to be
+the terminal's
+.Ic stop
+character.
+.It Ic susp
+If
+.Nm telnet
+is in
+.Ic localchars
+mode, or
+.Dv LINEMODE
+is enabled, and the
+.Ic suspend
+character is typed, a
+.Dv TELNET SUSP
+sequence (see
+.Ic send
+.Ic susp
+above)
+is sent to the remote host.
+The initial value for the suspend character is taken to be
+the terminal's
+.Ic suspend
+character.
+.ne 1i
+.It Ic tracefile
+This is the file to which the output, caused by
+.Ic netdata
+or
+.Ic option
+tracing being
+.Dv TRUE ,
+will be written.  If it is set to
+.Dq Fl ,
+then tracing information will be written to standard output (the default).
+.It Ic worderase
+If
+.Nm telnet
+is operating in
+.Dv LINEMODE
+or \*(Lqold line by line\*(Lq mode, then this character is taken to
+be the terminal's
+.Ic worderase
+character.
+The initial value for the worderase character is taken to be
+the terminal's
+.Ic worderase
+character.
+.It Ic \&?
+Displays the legal
+.Ic set
+.Pq Ic unset
+commands.
+.El
+.It Ic slc Ar state 
+The
+.Ic slc
+command (Set Local Characters) is used to set
+or change the state of the the special
+characters when the 
+.Dv TELNET LINEMODE
+option has
+been enabled.  Special characters are characters that get
+mapped to 
+.Tn TELNET
+commands sequences (like
+.Ic ip
+or
+.Ic quit  )
+or line editing characters (like
+.Ic erase
+and
+.Ic kill  ) .
+By default, the local special characters are exported.
+.Bl -tag -width Fl
+.It Ic check
+Verify the current settings for the current special characters.
+The remote side is requested to send all the current special
+character settings, and if there are any discrepancies with
+the local side, the local side will switch to the remote value.
+.It Ic export
+Switch to the local defaults for the special characters.  The
+local default characters are those of the local terminal at
+the time when
+.Nm telnet
+was started.
+.It Ic import
+Switch to the remote defaults for the special characters.
+The remote default characters are those of the remote system
+at the time when the 
+.Tn TELNET
+connection was established.
+.It Ic \&?
+Prints out help information for the
+.Ic slc
+command.
+.El
+.It Ic status
+Show the current status of
+.Nm telnet  .
+This includes the peer one is connected to, as well
+as the current mode.
+.It Ic toggle Ar arguments ... 
+Toggle (between
+.Dv TRUE
+and
+.Dv FALSE )
+various flags that control how
+.Nm telnet
+responds to events.
+These flags may be set explicitly to
+.Dv TRUE
+or
+.Dv FALSE
+using the
+.Ic set
+and
+.Ic unset
+commands listed above.
+More than one argument may be specified.
+The state of these flags may be interrogated with the
+.Ic display
+command.
+Valid arguments are:
+.Bl -tag -width Ar
+.It Ic authdebug
+Turns on debugging information for the authentication code.
+.It Ic autoflush
+If
+.Ic autoflush
+and
+.Ic localchars
+are both
+.Dv TRUE ,
+then when the
+.Ic ao  ,
+or
+.Ic quit
+characters are recognized (and transformed into
+.Tn TELNET
+sequences; see
+.Ic set
+above for details),
+.Nm telnet
+refuses to display any data on the user's terminal
+until the remote system acknowledges (via a
+.Dv TELNET TIMING MARK
+option)
+that it has processed those
+.Tn TELNET
+sequences.
+The initial value for this toggle is
+.Dv TRUE
+if the terminal user had not
+done an "stty noflsh", otherwise
+.Dv FALSE
+(see
+.Xr stty  1  ) .
+.It Ic autodecrypt
+When the
+.Dv TELNET ENCRYPT
+option is negotiated, by
+default the actual encryption (decryption) of the data
+stream does not start automatically.  The autoencrypt
+(autodecrypt) command states that encryption of the
+output (input) stream should be enabled as soon as
+possible.
+.sp
+.Pp
+Note:  Because of export controls, the
+.Dv TELNET ENCRYPT
+option is not supported outside the United States and Canada.
+.It Ic autologin
+If the remote side supports the
+.Dv TELNET AUTHENTICATION
+option
+.Tn TELNET
+attempts to use it to perform automatic authentication.  If the
+.Dv AUTHENTICATION
+option is not supported, the user's login
+name are propagated through the
+.Dv TELNET ENVIRON
+option.
+This command is the same as specifying
+.Ar a
+option on the
+.Ic open
+command.
+.It Ic autosynch
+If
+.Ic autosynch
+and
+.Ic localchars
+are both
+.Dv TRUE ,
+then when either the
+.Ic intr
+or
+.Ic quit
+characters is typed (see
+.Ic set
+above for descriptions of the
+.Ic intr
+and
+.Ic quit
+characters), the resulting
+.Tn TELNET
+sequence sent is followed by the
+.Dv TELNET SYNCH
+sequence.
+This procedure
+.Ic should
+cause the remote system to begin throwing away all previously
+typed input until both of the
+.Tn TELNET
+sequences have been read and acted upon.
+The initial value of this toggle is
+.Dv FALSE .
+.It Ic binary
+Enable or disable the
+.Dv TELNET BINARY
+option on both input and output.
+.It Ic inbinary
+Enable or disable the
+.Dv TELNET BINARY
+option on input.
+.It Ic outbinary
+Enable or disable the
+.Dv TELNET BINARY
+option on output.
+.It Ic crlf
+If this is
+.Dv TRUE ,
+then carriage returns will be sent as
+.Li <CR><LF> .
+If this is
+.Dv FALSE ,
+then carriage returns will be send as
+.Li <CR><NUL> .
+The initial value for this toggle is
+.Dv FALSE .
+.It Ic crmod
+Toggle carriage return mode.
+When this mode is enabled, most carriage return characters received from
+the remote host will be mapped into a carriage return followed by
+a line feed.
+This mode does not affect those characters typed by the user, only
+those received from the remote host.
+This mode is not very useful unless the remote host
+only sends carriage return, but never line feed.
+The initial value for this toggle is
+.Dv FALSE .
+.It Ic debug
+Toggles socket level debugging (useful only to the
+.Ic super user  ) .
+The initial value for this toggle is
+.Dv FALSE .
+.It Ic encdebug
+Turns on debugging information for the encryption code.
+.It Ic localchars
+If this is
+.Dv TRUE ,
+then the
+.Ic flush  ,
+.Ic interrupt ,
+.Ic quit  ,
+.Ic erase ,
+and
+.Ic kill
+characters (see
+.Ic set
+above) are recognized locally, and transformed into (hopefully) appropriate
+.Tn TELNET
+control sequences
+(respectively
+.Ic ao  ,
+.Ic ip ,
+.Ic brk  ,
+.Ic ec ,
+and
+.Ic el  ;
+see
+.Ic send
+above).
+The initial value for this toggle is
+.Dv TRUE
+in \*(Lqold line by line\*(Rq mode,
+and
+.Dv FALSE
+in \*(Lqcharacter at a time\*(Rq mode.
+When the
+.Dv LINEMODE
+option is enabled, the value of
+.Ic localchars
+is ignored, and assumed to always be
+.Dv TRUE .
+If
+.Dv LINEMODE
+has ever been enabled, then
+.Ic quit
+is sent as
+.Ic abort  ,
+and
+.Ic eof and
+.B suspend
+are sent as
+.Ic eof and
+.Ic susp ,
+see
+.Ic send
+above).
+.It Ic netdata
+Toggles the display of all network data (in hexadecimal format).
+The initial value for this toggle is
+.Dv FALSE .
+.It Ic options
+Toggles the display of some internal
+.Nm telnet
+protocol processing (having to do with
+.Tn TELNET
+options).
+The initial value for this toggle is
+.Dv FALSE .
+.ne 1i
+.It Ic prettydump
+When the
+.Ic netdata
+toggle is enabled, if
+.Ic prettydump
+is enabled the output from the
+.Ic netdata
+command will be formatted in a more user readable format.
+Spaces are put between each character in the output, and the
+beginning of any
+.Tn TELNET
+escape sequence is preceded by a '*' to aid in locating them.
+.It Ic skiprc
+When the skiprc toggle is
+.Dv TRUE ,
+.Tn TELNET
+skips the reading of the
+.Pa \&.telnetrc
+file in the users home
+directory when connections are opened.  The initial
+value for this toggle is
+.Dv FALSE.
+.It Ic termdata
+Toggles the display of all terminal data (in hexadecimal format).
+The initial value for this toggle is
+.Dv FALSE .
+.It Ic verbose_encrypt
+When the
+.Ic verbose_encrypt
+toggle is
+.Dv TRUE ,
+.Tn TELNET
+prints out a message each time encryption is enabled or
+disabled.  The initial value for this toggle is
+.Dv FALSE.
+Note:  Because of export controls, data encryption
+is not supported outside of the United States and Canada.
+.It Ic \&?
+Displays the legal
+.Ic toggle
+commands.
+.El
+.It Ic z
+Suspend
+.Nm telnet  .
+This command only works when the user is using the
+.Xr csh  1  .
+.It Ic \&! Op Ar command 
+Execute a single command in a subshell on the local
+system.  If
+.Ic command
+is omitted, then an interactive
+subshell is invoked.
+.It Ic \&? Op Ar command 
+Get help.  With no arguments,
+.Nm telnet
+prints a help summary.
+If a command is specified,
+.Nm telnet
+will print the help information for just that command.
+.El
+.Sh ENVIRONMENT
+.Nm Telnet
+uses at least the
+.Ev HOME ,
+.Ev SHELL ,
+.Ev DISPLAY ,
+and
+.Ev TERM
+environment variables.
+Other environment variables may be propagated
+to the other side via the
+.Dv TELNET ENVIRON
+option.
+.Sh FILES
+.Bl -tag -width ~/.telnetrc -compact
+.It Pa ~/.telnetrc
+user customized telnet startup values
+.El
+.Sh HISTORY
+The
+.Nm Telnet
+command appeared in
+.Bx 4.2 .
+.Sh NOTES
+.Pp
+On some remote systems, echo has to be turned off manually when in
+\*(Lqold line by line\*(Rq mode.
+.Pp
+In \*(Lqold line by line\*(Rq mode or 
+.Dv LINEMODE
+the terminal's
+.Ic eof
+character is only recognized (and sent to the remote system)
+when it is the first character on a line.
diff --git a/contrib/telnet/telnet/telnet.c b/contrib/telnet/telnet/telnet.c
new file mode 100644
index 0000000..e792262
--- /dev/null
+++ b/contrib/telnet/telnet/telnet.c
@@ -0,0 +1,2650 @@
+/*
+ * Copyright (c) 1988, 1990, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef lint
+static char sccsid[] = "@(#)telnet.c	8.4 (Berkeley) 5/30/95";
+#endif /* not lint */
+
+#include <sys/types.h>
+
+#if	defined(unix)
+#include <signal.h>
+/* By the way, we need to include curses.h before telnet.h since,
+ * among other things, telnet.h #defines 'DO', which is a variable
+ * declared in curses.h.
+ */
+#endif	/* defined(unix) */
+
+#include <arpa/telnet.h>
+
+#include <ctype.h>
+
+#include "ring.h"
+
+#include "defines.h"
+#include "externs.h"
+#include "types.h"
+#include "general.h"
+
+
+#define	strip(x) ((my_want_state_is_wont(TELOPT_BINARY)) ? ((x)&0x7f) : (x))
+
+static unsigned char	subbuffer[SUBBUFSIZE],
+			*subpointer, *subend;	 /* buffer for sub-options */
+#define	SB_CLEAR()	subpointer = subbuffer;
+#define	SB_TERM()	{ subend = subpointer; SB_CLEAR(); }
+#define	SB_ACCUM(c)	if (subpointer < (subbuffer+sizeof subbuffer)) { \
+				*subpointer++ = (c); \
+			}
+
+#define	SB_GET()	((*subpointer++)&0xff)
+#define	SB_PEEK()	((*subpointer)&0xff)
+#define	SB_EOF()	(subpointer >= subend)
+#define	SB_LEN()	(subend - subpointer)
+
+char	options[256];		/* The combined options */
+char	do_dont_resp[256];
+char	will_wont_resp[256];
+
+int
+	eight = 0,
+	autologin = 0,	/* Autologin anyone? */
+	skiprc = 0,
+	connected,
+	showoptions,
+	In3270,		/* Are we in 3270 mode? */
+	ISend,		/* trying to send network data in */
+	debug = 0,
+	crmod,
+	netdata,	/* Print out network data flow */
+	crlf,		/* Should '\r' be mapped to <CR><LF> (or <CR><NUL>)? */
+#if	defined(TN3270)
+	noasynchtty = 0,/* User specified "-noasynch" on command line */
+	noasynchnet = 0,/* User specified "-noasynch" on command line */
+	askedSGA = 0,	/* We have talked about suppress go ahead */
+#endif	/* defined(TN3270) */
+	telnetport,
+	SYNCHing,	/* we are in TELNET SYNCH mode */
+	flushout,	/* flush output */
+	autoflush = 0,	/* flush output when interrupting? */
+	autosynch,	/* send interrupt characters with SYNCH? */
+	localflow,	/* we handle flow control locally */
+	restartany,	/* if flow control enabled, restart on any character */
+	localchars,	/* we recognize interrupt/quit */
+	donelclchars,	/* the user has set "localchars" */
+	donebinarytoggle,	/* the user has put us in binary */
+	dontlecho,	/* do we suppress local echoing right now? */
+	globalmode;
+
+char *prompt = 0;
+
+cc_t escape;
+cc_t rlogin;
+#ifdef	KLUDGELINEMODE
+cc_t echoc;
+#endif
+
+/*
+ * Telnet receiver states for fsm
+ */
+#define	TS_DATA		0
+#define	TS_IAC		1
+#define	TS_WILL		2
+#define	TS_WONT		3
+#define	TS_DO		4
+#define	TS_DONT		5
+#define	TS_CR		6
+#define	TS_SB		7		/* sub-option collection */
+#define	TS_SE		8		/* looking for sub-option end */
+
+static int	telrcv_state;
+#ifdef	OLD_ENVIRON
+unsigned char telopt_environ = TELOPT_NEW_ENVIRON;
+#else
+# define telopt_environ TELOPT_NEW_ENVIRON
+#endif
+
+jmp_buf	toplevel = { 0 };
+jmp_buf	peerdied;
+
+int	flushline;
+int	linemode;
+
+#ifdef	KLUDGELINEMODE
+int	kludgelinemode = 1;
+#endif
+
+/*
+ * The following are some clocks used to decide how to interpret
+ * the relationship between various variables.
+ */
+
+Clocks clocks;
+
+#ifdef	notdef
+Modelist modelist[] = {
+	{ "telnet command mode", COMMAND_LINE },
+	{ "character-at-a-time mode", 0 },
+	{ "character-at-a-time mode (local echo)", LOCAL_ECHO|LOCAL_CHARS },
+	{ "line-by-line mode (remote echo)", LINE | LOCAL_CHARS },
+	{ "line-by-line mode", LINE | LOCAL_ECHO | LOCAL_CHARS },
+	{ "line-by-line mode (local echoing suppressed)", LINE | LOCAL_CHARS },
+	{ "3270 mode", 0 },
+};
+#endif
+
+
+/*
+ * Initialize telnet environment.
+ */
+
+    void
+init_telnet()
+{
+    env_init();
+
+    SB_CLEAR();
+    ClearArray(options);
+
+    connected = In3270 = ISend = localflow = donebinarytoggle = 0;
+#if	defined(AUTHENTICATION) || defined(ENCRYPTION)
+    auth_encrypt_connect(connected);
+#endif	/* defined(AUTHENTICATION) || defined(ENCRYPTION)  */
+    restartany = -1;
+
+    SYNCHing = 0;
+
+    /* Don't change NetTrace */
+
+    escape = CONTROL(']');
+    rlogin = _POSIX_VDISABLE;
+#ifdef	KLUDGELINEMODE
+    echoc = CONTROL('E');
+#endif
+
+    flushline = 1;
+    telrcv_state = TS_DATA;
+}
+
+
+#ifdef	notdef
+#include <varargs.h>
+
+    /*VARARGS*/
+    static void
+printring(va_alist)
+    va_dcl
+{
+    va_list ap;
+    char buffer[100];		/* where things go */
+    char *ptr;
+    char *format;
+    char *string;
+    Ring *ring;
+    int i;
+
+    va_start(ap);
+
+    ring = va_arg(ap, Ring *);
+    format = va_arg(ap, char *);
+    ptr = buffer;
+
+    while ((i = *format++) != 0) {
+	if (i == '%') {
+	    i = *format++;
+	    switch (i) {
+	    case 'c':
+		*ptr++ = va_arg(ap, int);
+		break;
+	    case 's':
+		string = va_arg(ap, char *);
+		ring_supply_data(ring, buffer, ptr-buffer);
+		ring_supply_data(ring, string, strlen(string));
+		ptr = buffer;
+		break;
+	    case 0:
+		ExitString("printring: trailing %%.\n", 1);
+		/*NOTREACHED*/
+	    default:
+		ExitString("printring: unknown format character.\n", 1);
+		/*NOTREACHED*/
+	    }
+	} else {
+	    *ptr++ = i;
+	}
+    }
+    ring_supply_data(ring, buffer, ptr-buffer);
+}
+#endif
+
+/*
+ * These routines are in charge of sending option negotiations
+ * to the other side.
+ *
+ * The basic idea is that we send the negotiation if either side
+ * is in disagreement as to what the current state should be.
+ */
+
+    void
+send_do(c, init)
+    register int c, init;
+{
+    if (init) {
+	if (((do_dont_resp[c] == 0) && my_state_is_do(c)) ||
+				my_want_state_is_do(c))
+	    return;
+	set_my_want_state_do(c);
+	do_dont_resp[c]++;
+    }
+    NET2ADD(IAC, DO);
+    NETADD(c);
+    printoption("SENT", DO, c);
+}
+
+    void
+send_dont(c, init)
+    register int c, init;
+{
+    if (init) {
+	if (((do_dont_resp[c] == 0) && my_state_is_dont(c)) ||
+				my_want_state_is_dont(c))
+	    return;
+	set_my_want_state_dont(c);
+	do_dont_resp[c]++;
+    }
+    NET2ADD(IAC, DONT);
+    NETADD(c);
+    printoption("SENT", DONT, c);
+}
+
+    void
+send_will(c, init)
+    register int c, init;
+{
+    if (init) {
+	if (((will_wont_resp[c] == 0) && my_state_is_will(c)) ||
+				my_want_state_is_will(c))
+	    return;
+	set_my_want_state_will(c);
+	will_wont_resp[c]++;
+    }
+    NET2ADD(IAC, WILL);
+    NETADD(c);
+    printoption("SENT", WILL, c);
+}
+
+    void
+send_wont(c, init)
+    register int c, init;
+{
+    if (init) {
+	if (((will_wont_resp[c] == 0) && my_state_is_wont(c)) ||
+				my_want_state_is_wont(c))
+	    return;
+	set_my_want_state_wont(c);
+	will_wont_resp[c]++;
+    }
+    NET2ADD(IAC, WONT);
+    NETADD(c);
+    printoption("SENT", WONT, c);
+}
+
+
+	void
+willoption(option)
+	int option;
+{
+	int new_state_ok = 0;
+
+	if (do_dont_resp[option]) {
+	    --do_dont_resp[option];
+	    if (do_dont_resp[option] && my_state_is_do(option))
+		--do_dont_resp[option];
+	}
+
+	if ((do_dont_resp[option] == 0) && my_want_state_is_dont(option)) {
+
+	    switch (option) {
+
+	    case TELOPT_ECHO:
+#	    if defined(TN3270)
+		/*
+		 * The following is a pain in the rear-end.
+		 * Various IBM servers (some versions of Wiscnet,
+		 * possibly Fibronics/Spartacus, and who knows who
+		 * else) will NOT allow us to send "DO SGA" too early
+		 * in the setup proceedings.  On the other hand,
+		 * 4.2 servers (telnetd) won't set SGA correctly.
+		 * So, we are stuck.  Empirically (but, based on
+		 * a VERY small sample), the IBM servers don't send
+		 * out anything about ECHO, so we postpone our sending
+		 * "DO SGA" until we see "WILL ECHO" (which 4.2 servers
+		 * DO send).
+		  */
+		{
+		    if (askedSGA == 0) {
+			askedSGA = 1;
+			if (my_want_state_is_dont(TELOPT_SGA))
+			    send_do(TELOPT_SGA, 1);
+		    }
+		}
+		    /* Fall through */
+	    case TELOPT_EOR:
+#endif	    /* defined(TN3270) */
+	    case TELOPT_BINARY:
+	    case TELOPT_SGA:
+		settimer(modenegotiated);
+		/* FALL THROUGH */
+	    case TELOPT_STATUS:
+#if	defined(AUTHENTICATION)
+	    case TELOPT_AUTHENTICATION:
+#endif
+#ifdef	ENCRYPTION
+	    case TELOPT_ENCRYPT:
+#endif /* ENCRYPTION */
+		new_state_ok = 1;
+		break;
+
+	    case TELOPT_TM:
+		if (flushout)
+		    flushout = 0;
+		/*
+		 * Special case for TM.  If we get back a WILL,
+		 * pretend we got back a WONT.
+		 */
+		set_my_want_state_dont(option);
+		set_my_state_dont(option);
+		return;			/* Never reply to TM will's/wont's */
+
+	    case TELOPT_LINEMODE:
+	    default:
+		break;
+	    }
+
+	    if (new_state_ok) {
+		set_my_want_state_do(option);
+		send_do(option, 0);
+		setconnmode(0);		/* possibly set new tty mode */
+	    } else {
+		do_dont_resp[option]++;
+		send_dont(option, 0);
+	    }
+	}
+	set_my_state_do(option);
+#ifdef	ENCRYPTION
+	if (option == TELOPT_ENCRYPT)
+		encrypt_send_support();
+#endif	/* ENCRYPTION */
+}
+
+	void
+wontoption(option)
+	int option;
+{
+	if (do_dont_resp[option]) {
+	    --do_dont_resp[option];
+	    if (do_dont_resp[option] && my_state_is_dont(option))
+		--do_dont_resp[option];
+	}
+
+	if ((do_dont_resp[option] == 0) && my_want_state_is_do(option)) {
+
+	    switch (option) {
+
+#ifdef	KLUDGELINEMODE
+	    case TELOPT_SGA:
+		if (!kludgelinemode)
+		    break;
+		/* FALL THROUGH */
+#endif
+	    case TELOPT_ECHO:
+		settimer(modenegotiated);
+		break;
+
+	    case TELOPT_TM:
+		if (flushout)
+		    flushout = 0;
+		set_my_want_state_dont(option);
+		set_my_state_dont(option);
+		return;		/* Never reply to TM will's/wont's */
+
+	    default:
+		break;
+	    }
+	    set_my_want_state_dont(option);
+	    if (my_state_is_do(option))
+		send_dont(option, 0);
+	    setconnmode(0);			/* Set new tty mode */
+	} else if (option == TELOPT_TM) {
+	    /*
+	     * Special case for TM.
+	     */
+	    if (flushout)
+		flushout = 0;
+	    set_my_want_state_dont(option);
+	}
+	set_my_state_dont(option);
+}
+
+	static void
+dooption(option)
+	int option;
+{
+	int new_state_ok = 0;
+
+	if (will_wont_resp[option]) {
+	    --will_wont_resp[option];
+	    if (will_wont_resp[option] && my_state_is_will(option))
+		--will_wont_resp[option];
+	}
+
+	if (will_wont_resp[option] == 0) {
+	  if (my_want_state_is_wont(option)) {
+
+	    switch (option) {
+
+	    case TELOPT_TM:
+		/*
+		 * Special case for TM.  We send a WILL, but pretend
+		 * we sent WONT.
+		 */
+		send_will(option, 0);
+		set_my_want_state_wont(TELOPT_TM);
+		set_my_state_wont(TELOPT_TM);
+		return;
+
+#	if defined(TN3270)
+	    case TELOPT_EOR:		/* end of record */
+#	endif	/* defined(TN3270) */
+	    case TELOPT_BINARY:		/* binary mode */
+	    case TELOPT_NAWS:		/* window size */
+	    case TELOPT_TSPEED:		/* terminal speed */
+	    case TELOPT_LFLOW:		/* local flow control */
+	    case TELOPT_TTYPE:		/* terminal type option */
+	    case TELOPT_SGA:		/* no big deal */
+#ifdef	ENCRYPTION
+	    case TELOPT_ENCRYPT:	/* encryption variable option */
+#endif	/* ENCRYPTION */
+		new_state_ok = 1;
+		break;
+
+	    case TELOPT_NEW_ENVIRON:	/* New environment variable option */
+#ifdef	OLD_ENVIRON
+		if (my_state_is_will(TELOPT_OLD_ENVIRON))
+			send_wont(TELOPT_OLD_ENVIRON, 1); /* turn off the old */
+		goto env_common;
+	    case TELOPT_OLD_ENVIRON:	/* Old environment variable option */
+		if (my_state_is_will(TELOPT_NEW_ENVIRON))
+			break;		/* Don't enable if new one is in use! */
+	    env_common:
+		telopt_environ = option;
+#endif
+		new_state_ok = 1;
+		break;
+
+#if	defined(AUTHENTICATION)
+	    case TELOPT_AUTHENTICATION:
+		if (autologin)
+			new_state_ok = 1;
+		break;
+#endif
+
+	    case TELOPT_XDISPLOC:	/* X Display location */
+		if (env_getvalue((unsigned char *)"DISPLAY"))
+		    new_state_ok = 1;
+		break;
+
+	    case TELOPT_LINEMODE:
+#ifdef	KLUDGELINEMODE
+		kludgelinemode = 0;
+		send_do(TELOPT_SGA, 1);
+#endif
+		set_my_want_state_will(TELOPT_LINEMODE);
+		send_will(option, 0);
+		set_my_state_will(TELOPT_LINEMODE);
+		slc_init();
+		return;
+
+	    case TELOPT_ECHO:		/* We're never going to echo... */
+	    default:
+		break;
+	    }
+
+	    if (new_state_ok) {
+		set_my_want_state_will(option);
+		send_will(option, 0);
+		setconnmode(0);			/* Set new tty mode */
+	    } else {
+		will_wont_resp[option]++;
+		send_wont(option, 0);
+	    }
+	  } else {
+	    /*
+	     * Handle options that need more things done after the
+	     * other side has acknowledged the option.
+	     */
+	    switch (option) {
+	    case TELOPT_LINEMODE:
+#ifdef	KLUDGELINEMODE
+		kludgelinemode = 0;
+		send_do(TELOPT_SGA, 1);
+#endif
+		set_my_state_will(option);
+		slc_init();
+		send_do(TELOPT_SGA, 0);
+		return;
+	    }
+	  }
+	}
+	set_my_state_will(option);
+}
+
+	static void
+dontoption(option)
+	int option;
+{
+
+	if (will_wont_resp[option]) {
+	    --will_wont_resp[option];
+	    if (will_wont_resp[option] && my_state_is_wont(option))
+		--will_wont_resp[option];
+	}
+
+	if ((will_wont_resp[option] == 0) && my_want_state_is_will(option)) {
+	    switch (option) {
+	    case TELOPT_LINEMODE:
+		linemode = 0;	/* put us back to the default state */
+		break;
+#ifdef	OLD_ENVIRON
+	    case TELOPT_NEW_ENVIRON:
+		/*
+		 * The new environ option wasn't recognized, try
+		 * the old one.
+		 */
+		send_will(TELOPT_OLD_ENVIRON, 1);
+		telopt_environ = TELOPT_OLD_ENVIRON;
+		break;
+#endif
+	    }
+	    /* we always accept a DONT */
+	    set_my_want_state_wont(option);
+	    if (my_state_is_will(option))
+		send_wont(option, 0);
+	    setconnmode(0);			/* Set new tty mode */
+	}
+	set_my_state_wont(option);
+}
+
+/*
+ * Given a buffer returned by tgetent(), this routine will turn
+ * the pipe seperated list of names in the buffer into an array
+ * of pointers to null terminated names.  We toss out any bad,
+ * duplicate, or verbose names (names with spaces).
+ */
+
+static char *name_unknown = "UNKNOWN";
+static char *unknown[] = { 0, 0 };
+
+	char **
+mklist(buf, name)
+	char *buf, *name;
+{
+	register int n;
+	register char c, *cp, **argvp, *cp2, **argv, **avt;
+
+	if (name) {
+		if ((int)strlen(name) > 40) {
+			name = 0;
+			unknown[0] = name_unknown;
+		} else {
+			unknown[0] = name;
+			upcase(name);
+		}
+	} else
+		unknown[0] = name_unknown;
+	/*
+	 * Count up the number of names.
+	 */
+	for (n = 1, cp = buf; *cp && *cp != ':'; cp++) {
+		if (*cp == '|')
+			n++;
+	}
+	/*
+	 * Allocate an array to put the name pointers into
+	 */
+	argv = (char **)malloc((n+3)*sizeof(char *));
+	if (argv == 0)
+		return(unknown);
+
+	/*
+	 * Fill up the array of pointers to names.
+	 */
+	*argv = 0;
+	argvp = argv+1;
+	n = 0;
+	for (cp = cp2 = buf; (c = *cp);  cp++) {
+		if (c == '|' || c == ':') {
+			*cp++ = '\0';
+			/*
+			 * Skip entries that have spaces or are over 40
+			 * characters long.  If this is our environment
+			 * name, then put it up front.  Otherwise, as
+			 * long as this is not a duplicate name (case
+			 * insensitive) add it to the list.
+			 */
+			if (n || (cp - cp2 > 41))
+				;
+			else if (name && (strncasecmp(name, cp2, cp-cp2) == 0))
+				*argv = cp2;
+			else if (is_unique(cp2, argv+1, argvp))
+				*argvp++ = cp2;
+			if (c == ':')
+				break;
+			/*
+			 * Skip multiple delimiters. Reset cp2 to
+			 * the beginning of the next name. Reset n,
+			 * the flag for names with spaces.
+			 */
+			while ((c = *cp) == '|')
+				cp++;
+			cp2 = cp;
+			n = 0;
+		}
+		/*
+		 * Skip entries with spaces or non-ascii values.
+		 * Convert lower case letters to upper case.
+		 */
+		if ((c == ' ') || !isascii(c))
+			n = 1;
+		else if (islower(c))
+			*cp = toupper(c);
+	}
+
+	/*
+	 * Check for an old V6 2 character name.  If the second
+	 * name points to the beginning of the buffer, and is
+	 * only 2 characters long, move it to the end of the array.
+	 */
+	if ((argv[1] == buf) && (strlen(argv[1]) == 2)) {
+		--argvp;
+		for (avt = &argv[1]; avt < argvp; avt++)
+			*avt = *(avt+1);
+		*argvp++ = buf;
+	}
+
+	/*
+	 * Duplicate last name, for TTYPE option, and null
+	 * terminate the array.  If we didn't find a match on
+	 * our terminal name, put that name at the beginning.
+	 */
+	cp = *(argvp-1);
+	*argvp++ = cp;
+	*argvp = 0;
+
+	if (*argv == 0) {
+		if (name)
+			*argv = name;
+		else {
+			--argvp;
+			for (avt = argv; avt < argvp; avt++)
+				*avt = *(avt+1);
+		}
+	}
+	if (*argv)
+		return(argv);
+	else
+		return(unknown);
+}
+
+	int
+is_unique(name, as, ae)
+	register char *name, **as, **ae;
+{
+	register char **ap;
+	register int n;
+
+	n = strlen(name) + 1;
+	for (ap = as; ap < ae; ap++)
+		if (strncasecmp(*ap, name, n) == 0)
+			return(0);
+	return (1);
+}
+
+#ifdef	TERMCAP
+char termbuf[1024];
+
+	/*ARGSUSED*/
+	int
+setupterm(tname, fd, errp)
+	char *tname;
+	int fd, *errp;
+{
+	if (tgetent(termbuf, tname) == 1) {
+		termbuf[1023] = '\0';
+		if (errp)
+			*errp = 1;
+		return(0);
+	}
+	if (errp)
+		*errp = 0;
+	return(-1);
+}
+#else
+#define	termbuf	ttytype
+extern char ttytype[];
+#endif
+
+int resettermname = 1;
+
+	char *
+gettermname()
+{
+	char *tname;
+	static char **tnamep = 0;
+	static char **next;
+	int err;
+
+	if (resettermname) {
+		resettermname = 0;
+		if (tnamep && tnamep != unknown)
+			free(tnamep);
+		if ((tname = (char *)env_getvalue((unsigned char *)"TERM")) &&
+				(setupterm(tname, 1, &err) == 0)) {
+			tnamep = mklist(termbuf, tname);
+		} else {
+			if (tname && ((int)strlen(tname) <= 40)) {
+				unknown[0] = tname;
+				upcase(tname);
+			} else
+				unknown[0] = name_unknown;
+			tnamep = unknown;
+		}
+		next = tnamep;
+	}
+	if (*next == 0)
+		next = tnamep;
+	return(*next++);
+}
+/*
+ * suboption()
+ *
+ *	Look at the sub-option buffer, and try to be helpful to the other
+ * side.
+ *
+ *	Currently we recognize:
+ *
+ *		Terminal type, send request.
+ *		Terminal speed (send request).
+ *		Local flow control (is request).
+ *		Linemode
+ */
+
+    static void
+suboption()
+{
+    unsigned char subchar;
+
+    printsub('<', subbuffer, SB_LEN()+2);
+    switch (subchar = SB_GET()) {
+    case TELOPT_TTYPE:
+	if (my_want_state_is_wont(TELOPT_TTYPE))
+	    return;
+	if (SB_EOF() || SB_GET() != TELQUAL_SEND) {
+	    return;
+	} else {
+	    char *name;
+	    unsigned char temp[50];
+	    int len;
+
+#if	defined(TN3270)
+	    if (tn3270_ttype()) {
+		return;
+	    }
+#endif	/* defined(TN3270) */
+	    name = gettermname();
+	    len = strlen(name) + 4 + 2;
+	    if (len < NETROOM()) {
+		sprintf((char *)temp, "%c%c%c%c%s%c%c", IAC, SB, TELOPT_TTYPE,
+				TELQUAL_IS, name, IAC, SE);
+		ring_supply_data(&netoring, temp, len);
+		printsub('>', &temp[2], len-2);
+	    } else {
+		ExitString("No room in buffer for terminal type.\n", 1);
+		/*NOTREACHED*/
+	    }
+	}
+	break;
+    case TELOPT_TSPEED:
+	if (my_want_state_is_wont(TELOPT_TSPEED))
+	    return;
+	if (SB_EOF())
+	    return;
+	if (SB_GET() == TELQUAL_SEND) {
+	    long ospeed, ispeed;
+	    unsigned char temp[50];
+	    int len;
+
+	    TerminalSpeeds(&ispeed, &ospeed);
+
+	    sprintf((char *)temp, "%c%c%c%c%d,%d%c%c", IAC, SB, TELOPT_TSPEED,
+		    TELQUAL_IS, ospeed, ispeed, IAC, SE);
+	    len = strlen((char *)temp+4) + 4;	/* temp[3] is 0 ... */
+
+	    if (len < NETROOM()) {
+		ring_supply_data(&netoring, temp, len);
+		printsub('>', temp+2, len - 2);
+	    }
+/*@*/	    else printf("lm_will: not enough room in buffer\n");
+	}
+	break;
+    case TELOPT_LFLOW:
+	if (my_want_state_is_wont(TELOPT_LFLOW))
+	    return;
+	if (SB_EOF())
+	    return;
+	switch(SB_GET()) {
+	case LFLOW_RESTART_ANY:
+	    restartany = 1;
+	    break;
+	case LFLOW_RESTART_XON:
+	    restartany = 0;
+	    break;
+	case LFLOW_ON:
+	    localflow = 1;
+	    break;
+	case LFLOW_OFF:
+	    localflow = 0;
+	    break;
+	default:
+	    return;
+	}
+	setcommandmode();
+	setconnmode(0);
+	break;
+
+    case TELOPT_LINEMODE:
+	if (my_want_state_is_wont(TELOPT_LINEMODE))
+	    return;
+	if (SB_EOF())
+	    return;
+	switch (SB_GET()) {
+	case WILL:
+	    lm_will(subpointer, SB_LEN());
+	    break;
+	case WONT:
+	    lm_wont(subpointer, SB_LEN());
+	    break;
+	case DO:
+	    lm_do(subpointer, SB_LEN());
+	    break;
+	case DONT:
+	    lm_dont(subpointer, SB_LEN());
+	    break;
+	case LM_SLC:
+	    slc(subpointer, SB_LEN());
+	    break;
+	case LM_MODE:
+	    lm_mode(subpointer, SB_LEN(), 0);
+	    break;
+	default:
+	    break;
+	}
+	break;
+
+#ifdef	OLD_ENVIRON
+    case TELOPT_OLD_ENVIRON:
+#endif
+    case TELOPT_NEW_ENVIRON:
+	if (SB_EOF())
+	    return;
+	switch(SB_PEEK()) {
+	case TELQUAL_IS:
+	case TELQUAL_INFO:
+	    if (my_want_state_is_dont(subchar))
+		return;
+	    break;
+	case TELQUAL_SEND:
+	    if (my_want_state_is_wont(subchar)) {
+		return;
+	    }
+	    break;
+	default:
+	    return;
+	}
+	env_opt(subpointer, SB_LEN());
+	break;
+
+    case TELOPT_XDISPLOC:
+	if (my_want_state_is_wont(TELOPT_XDISPLOC))
+	    return;
+	if (SB_EOF())
+	    return;
+	if (SB_GET() == TELQUAL_SEND) {
+	    unsigned char temp[50], *dp;
+	    int len;
+
+	    if ((dp = env_getvalue((unsigned char *)"DISPLAY")) == NULL) {
+		/*
+		 * Something happened, we no longer have a DISPLAY
+		 * variable.  So, turn off the option.
+		 */
+		send_wont(TELOPT_XDISPLOC, 1);
+		break;
+	    }
+	    sprintf((char *)temp, "%c%c%c%c%s%c%c", IAC, SB, TELOPT_XDISPLOC,
+		    TELQUAL_IS, dp, IAC, SE);
+	    len = strlen((char *)temp+4) + 4;	/* temp[3] is 0 ... */
+
+	    if (len < NETROOM()) {
+		ring_supply_data(&netoring, temp, len);
+		printsub('>', temp+2, len - 2);
+	    }
+/*@*/	    else printf("lm_will: not enough room in buffer\n");
+	}
+	break;
+
+#if	defined(AUTHENTICATION)
+	case TELOPT_AUTHENTICATION: {
+		if (!autologin)
+			break;
+		if (SB_EOF())
+			return;
+		switch(SB_GET()) {
+		case TELQUAL_IS:
+			if (my_want_state_is_dont(TELOPT_AUTHENTICATION))
+				return;
+			auth_is(subpointer, SB_LEN());
+			break;
+		case TELQUAL_SEND:
+			if (my_want_state_is_wont(TELOPT_AUTHENTICATION))
+				return;
+			auth_send(subpointer, SB_LEN());
+			break;
+		case TELQUAL_REPLY:
+			if (my_want_state_is_wont(TELOPT_AUTHENTICATION))
+				return;
+			auth_reply(subpointer, SB_LEN());
+			break;
+		case TELQUAL_NAME:
+			if (my_want_state_is_dont(TELOPT_AUTHENTICATION))
+				return;
+			auth_name(subpointer, SB_LEN());
+			break;
+		}
+	}
+	break;
+#endif
+#ifdef	ENCRYPTION
+	case TELOPT_ENCRYPT:
+		if (SB_EOF())
+			return;
+		switch(SB_GET()) {
+		case ENCRYPT_START:
+			if (my_want_state_is_dont(TELOPT_ENCRYPT))
+				return;
+			encrypt_start(subpointer, SB_LEN());
+			break;
+		case ENCRYPT_END:
+			if (my_want_state_is_dont(TELOPT_ENCRYPT))
+				return;
+			encrypt_end();
+			break;
+		case ENCRYPT_SUPPORT:
+			if (my_want_state_is_wont(TELOPT_ENCRYPT))
+				return;
+			encrypt_support(subpointer, SB_LEN());
+			break;
+		case ENCRYPT_REQSTART:
+			if (my_want_state_is_wont(TELOPT_ENCRYPT))
+				return;
+			encrypt_request_start(subpointer, SB_LEN());
+			break;
+		case ENCRYPT_REQEND:
+			if (my_want_state_is_wont(TELOPT_ENCRYPT))
+				return;
+			/*
+			 * We can always send an REQEND so that we cannot
+			 * get stuck encrypting.  We should only get this
+			 * if we have been able to get in the correct mode
+			 * anyhow.
+			 */
+			encrypt_request_end();
+			break;
+		case ENCRYPT_IS:
+			if (my_want_state_is_dont(TELOPT_ENCRYPT))
+				return;
+			encrypt_is(subpointer, SB_LEN());
+			break;
+		case ENCRYPT_REPLY:
+			if (my_want_state_is_wont(TELOPT_ENCRYPT))
+				return;
+			encrypt_reply(subpointer, SB_LEN());
+			break;
+		case ENCRYPT_ENC_KEYID:
+			if (my_want_state_is_dont(TELOPT_ENCRYPT))
+				return;
+			encrypt_enc_keyid(subpointer, SB_LEN());
+			break;
+		case ENCRYPT_DEC_KEYID:
+			if (my_want_state_is_wont(TELOPT_ENCRYPT))
+				return;
+			encrypt_dec_keyid(subpointer, SB_LEN());
+			break;
+		default:
+			break;
+		}
+		break;
+#endif	/* ENCRYPTION */
+    default:
+	break;
+    }
+}
+
+static unsigned char str_lm[] = { IAC, SB, TELOPT_LINEMODE, 0, 0, IAC, SE };
+
+    void
+lm_will(cmd, len)
+    unsigned char *cmd;
+    int len;
+{
+    if (len < 1) {
+/*@*/	printf("lm_will: no command!!!\n");	/* Should not happen... */
+	return;
+    }
+    switch(cmd[0]) {
+    case LM_FORWARDMASK:	/* We shouldn't ever get this... */
+    default:
+	str_lm[3] = DONT;
+	str_lm[4] = cmd[0];
+	if (NETROOM() > sizeof(str_lm)) {
+	    ring_supply_data(&netoring, str_lm, sizeof(str_lm));
+	    printsub('>', &str_lm[2], sizeof(str_lm)-2);
+	}
+/*@*/	else printf("lm_will: not enough room in buffer\n");
+	break;
+    }
+}
+
+    void
+lm_wont(cmd, len)
+    unsigned char *cmd;
+    int len;
+{
+    if (len < 1) {
+/*@*/	printf("lm_wont: no command!!!\n");	/* Should not happen... */
+	return;
+    }
+    switch(cmd[0]) {
+    case LM_FORWARDMASK:	/* We shouldn't ever get this... */
+    default:
+	/* We are always DONT, so don't respond */
+	return;
+    }
+}
+
+    void
+lm_do(cmd, len)
+    unsigned char *cmd;
+    int len;
+{
+    if (len < 1) {
+/*@*/	printf("lm_do: no command!!!\n");	/* Should not happen... */
+	return;
+    }
+    switch(cmd[0]) {
+    case LM_FORWARDMASK:
+    default:
+	str_lm[3] = WONT;
+	str_lm[4] = cmd[0];
+	if (NETROOM() > sizeof(str_lm)) {
+	    ring_supply_data(&netoring, str_lm, sizeof(str_lm));
+	    printsub('>', &str_lm[2], sizeof(str_lm)-2);
+	}
+/*@*/	else printf("lm_do: not enough room in buffer\n");
+	break;
+    }
+}
+
+    void
+lm_dont(cmd, len)
+    unsigned char *cmd;
+    int len;
+{
+    if (len < 1) {
+/*@*/	printf("lm_dont: no command!!!\n");	/* Should not happen... */
+	return;
+    }
+    switch(cmd[0]) {
+    case LM_FORWARDMASK:
+    default:
+	/* we are always WONT, so don't respond */
+	break;
+    }
+}
+
+static unsigned char str_lm_mode[] = {
+	IAC, SB, TELOPT_LINEMODE, LM_MODE, 0, IAC, SE
+};
+
+	void
+lm_mode(cmd, len, init)
+	unsigned char *cmd;
+	int len, init;
+{
+	if (len != 1)
+		return;
+	if ((linemode&MODE_MASK&~MODE_ACK) == *cmd)
+		return;
+	if (*cmd&MODE_ACK)
+		return;
+	linemode = *cmd&(MODE_MASK&~MODE_ACK);
+	str_lm_mode[4] = linemode;
+	if (!init)
+	    str_lm_mode[4] |= MODE_ACK;
+	if (NETROOM() > sizeof(str_lm_mode)) {
+	    ring_supply_data(&netoring, str_lm_mode, sizeof(str_lm_mode));
+	    printsub('>', &str_lm_mode[2], sizeof(str_lm_mode)-2);
+	}
+/*@*/	else printf("lm_mode: not enough room in buffer\n");
+	setconnmode(0);	/* set changed mode */
+}
+
+
+
+/*
+ * slc()
+ * Handle special character suboption of LINEMODE.
+ */
+
+struct spc {
+	cc_t val;
+	cc_t *valp;
+	char flags;	/* Current flags & level */
+	char mylevel;	/* Maximum level & flags */
+} spc_data[NSLC+1];
+
+#define SLC_IMPORT	0
+#define	SLC_EXPORT	1
+#define SLC_RVALUE	2
+static int slc_mode = SLC_EXPORT;
+
+	void
+slc_init()
+{
+	register struct spc *spcp;
+
+	localchars = 1;
+	for (spcp = spc_data; spcp < &spc_data[NSLC+1]; spcp++) {
+		spcp->val = 0;
+		spcp->valp = 0;
+		spcp->flags = spcp->mylevel = SLC_NOSUPPORT;
+	}
+
+#define	initfunc(func, flags) { \
+					spcp = &spc_data[func]; \
+					if (spcp->valp = tcval(func)) { \
+					    spcp->val = *spcp->valp; \
+					    spcp->mylevel = SLC_VARIABLE|flags; \
+					} else { \
+					    spcp->val = 0; \
+					    spcp->mylevel = SLC_DEFAULT; \
+					} \
+				    }
+
+	initfunc(SLC_SYNCH, 0);
+	/* No BRK */
+	initfunc(SLC_AO, 0);
+	initfunc(SLC_AYT, 0);
+	/* No EOR */
+	initfunc(SLC_ABORT, SLC_FLUSHIN|SLC_FLUSHOUT);
+	initfunc(SLC_EOF, 0);
+#ifndef	SYSV_TERMIO
+	initfunc(SLC_SUSP, SLC_FLUSHIN);
+#endif
+	initfunc(SLC_EC, 0);
+	initfunc(SLC_EL, 0);
+#ifndef	SYSV_TERMIO
+	initfunc(SLC_EW, 0);
+	initfunc(SLC_RP, 0);
+	initfunc(SLC_LNEXT, 0);
+#endif
+	initfunc(SLC_XON, 0);
+	initfunc(SLC_XOFF, 0);
+#ifdef	SYSV_TERMIO
+	spc_data[SLC_XON].mylevel = SLC_CANTCHANGE;
+	spc_data[SLC_XOFF].mylevel = SLC_CANTCHANGE;
+#endif
+	initfunc(SLC_FORW1, 0);
+#ifdef	USE_TERMIO
+	initfunc(SLC_FORW2, 0);
+	/* No FORW2 */
+#endif
+
+	initfunc(SLC_IP, SLC_FLUSHIN|SLC_FLUSHOUT);
+#undef	initfunc
+
+	if (slc_mode == SLC_EXPORT)
+		slc_export();
+	else
+		slc_import(1);
+
+}
+
+    void
+slcstate()
+{
+    printf("Special characters are %s values\n",
+		slc_mode == SLC_IMPORT ? "remote default" :
+		slc_mode == SLC_EXPORT ? "local" :
+					 "remote");
+}
+
+    void
+slc_mode_export()
+{
+    slc_mode = SLC_EXPORT;
+    if (my_state_is_will(TELOPT_LINEMODE))
+	slc_export();
+}
+
+    void
+slc_mode_import(def)
+    int def;
+{
+    slc_mode = def ? SLC_IMPORT : SLC_RVALUE;
+    if (my_state_is_will(TELOPT_LINEMODE))
+	slc_import(def);
+}
+
+unsigned char slc_import_val[] = {
+	IAC, SB, TELOPT_LINEMODE, LM_SLC, 0, SLC_VARIABLE, 0, IAC, SE
+};
+unsigned char slc_import_def[] = {
+	IAC, SB, TELOPT_LINEMODE, LM_SLC, 0, SLC_DEFAULT, 0, IAC, SE
+};
+
+    void
+slc_import(def)
+    int def;
+{
+    if (NETROOM() > sizeof(slc_import_val)) {
+	if (def) {
+	    ring_supply_data(&netoring, slc_import_def, sizeof(slc_import_def));
+	    printsub('>', &slc_import_def[2], sizeof(slc_import_def)-2);
+	} else {
+	    ring_supply_data(&netoring, slc_import_val, sizeof(slc_import_val));
+	    printsub('>', &slc_import_val[2], sizeof(slc_import_val)-2);
+	}
+    }
+/*@*/ else printf("slc_import: not enough room\n");
+}
+
+    void
+slc_export()
+{
+    register struct spc *spcp;
+
+    TerminalDefaultChars();
+
+    slc_start_reply();
+    for (spcp = &spc_data[1]; spcp < &spc_data[NSLC+1]; spcp++) {
+	if (spcp->mylevel != SLC_NOSUPPORT) {
+	    if (spcp->val == (cc_t)(_POSIX_VDISABLE))
+		spcp->flags = SLC_NOSUPPORT;
+	    else
+		spcp->flags = spcp->mylevel;
+	    if (spcp->valp)
+		spcp->val = *spcp->valp;
+	    slc_add_reply(spcp - spc_data, spcp->flags, spcp->val);
+	}
+    }
+    slc_end_reply();
+    (void)slc_update();
+    setconnmode(1);	/* Make sure the character values are set */
+}
+
+	void
+slc(cp, len)
+	register unsigned char *cp;
+	int len;
+{
+	register struct spc *spcp;
+	register int func,level;
+
+	slc_start_reply();
+
+	for (; len >= 3; len -=3, cp +=3) {
+
+		func = cp[SLC_FUNC];
+
+		if (func == 0) {
+			/*
+			 * Client side: always ignore 0 function.
+			 */
+			continue;
+		}
+		if (func > NSLC) {
+			if ((cp[SLC_FLAGS] & SLC_LEVELBITS) != SLC_NOSUPPORT)
+				slc_add_reply(func, SLC_NOSUPPORT, 0);
+			continue;
+		}
+
+		spcp = &spc_data[func];
+
+		level = cp[SLC_FLAGS]&(SLC_LEVELBITS|SLC_ACK);
+
+		if ((cp[SLC_VALUE] == (unsigned char)spcp->val) &&
+		    ((level&SLC_LEVELBITS) == (spcp->flags&SLC_LEVELBITS))) {
+			continue;
+		}
+
+		if (level == (SLC_DEFAULT|SLC_ACK)) {
+			/*
+			 * This is an error condition, the SLC_ACK
+			 * bit should never be set for the SLC_DEFAULT
+			 * level.  Our best guess to recover is to
+			 * ignore the SLC_ACK bit.
+			 */
+			cp[SLC_FLAGS] &= ~SLC_ACK;
+		}
+
+		if (level == ((spcp->flags&SLC_LEVELBITS)|SLC_ACK)) {
+			spcp->val = (cc_t)cp[SLC_VALUE];
+			spcp->flags = cp[SLC_FLAGS];	/* include SLC_ACK */
+			continue;
+		}
+
+		level &= ~SLC_ACK;
+
+		if (level <= (spcp->mylevel&SLC_LEVELBITS)) {
+			spcp->flags = cp[SLC_FLAGS]|SLC_ACK;
+			spcp->val = (cc_t)cp[SLC_VALUE];
+		}
+		if (level == SLC_DEFAULT) {
+			if ((spcp->mylevel&SLC_LEVELBITS) != SLC_DEFAULT)
+				spcp->flags = spcp->mylevel;
+			else
+				spcp->flags = SLC_NOSUPPORT;
+		}
+		slc_add_reply(func, spcp->flags, spcp->val);
+	}
+	slc_end_reply();
+	if (slc_update())
+		setconnmode(1);	/* set the  new character values */
+}
+
+    void
+slc_check()
+{
+    register struct spc *spcp;
+
+    slc_start_reply();
+    for (spcp = &spc_data[1]; spcp < &spc_data[NSLC+1]; spcp++) {
+	if (spcp->valp && spcp->val != *spcp->valp) {
+	    spcp->val = *spcp->valp;
+	    if (spcp->val == (cc_t)(_POSIX_VDISABLE))
+		spcp->flags = SLC_NOSUPPORT;
+	    else
+		spcp->flags = spcp->mylevel;
+	    slc_add_reply(spcp - spc_data, spcp->flags, spcp->val);
+	}
+    }
+    slc_end_reply();
+    setconnmode(1);
+}
+
+
+unsigned char slc_reply[128];
+unsigned char *slc_replyp;
+
+	void
+slc_start_reply()
+{
+	slc_replyp = slc_reply;
+	*slc_replyp++ = IAC;
+	*slc_replyp++ = SB;
+	*slc_replyp++ = TELOPT_LINEMODE;
+	*slc_replyp++ = LM_SLC;
+}
+
+	void
+slc_add_reply(func, flags, value)
+	unsigned char func;
+	unsigned char flags;
+	cc_t value;
+{
+	if ((*slc_replyp++ = func) == IAC)
+		*slc_replyp++ = IAC;
+	if ((*slc_replyp++ = flags) == IAC)
+		*slc_replyp++ = IAC;
+	if ((*slc_replyp++ = (unsigned char)value) == IAC)
+		*slc_replyp++ = IAC;
+}
+
+    void
+slc_end_reply()
+{
+    register int len;
+
+    *slc_replyp++ = IAC;
+    *slc_replyp++ = SE;
+    len = slc_replyp - slc_reply;
+    if (len <= 6)
+	return;
+    if (NETROOM() > len) {
+	ring_supply_data(&netoring, slc_reply, slc_replyp - slc_reply);
+	printsub('>', &slc_reply[2], slc_replyp - slc_reply - 2);
+    }
+/*@*/else printf("slc_end_reply: not enough room\n");
+}
+
+	int
+slc_update()
+{
+	register struct spc *spcp;
+	int need_update = 0;
+
+	for (spcp = &spc_data[1]; spcp < &spc_data[NSLC+1]; spcp++) {
+		if (!(spcp->flags&SLC_ACK))
+			continue;
+		spcp->flags &= ~SLC_ACK;
+		if (spcp->valp && (*spcp->valp != spcp->val)) {
+			*spcp->valp = spcp->val;
+			need_update = 1;
+		}
+	}
+	return(need_update);
+}
+
+#ifdef	OLD_ENVIRON
+# ifdef	ENV_HACK
+/*
+ * Earlier version of telnet/telnetd from the BSD code had
+ * the definitions of VALUE and VAR reversed.  To ensure
+ * maximum interoperability, we assume that the server is
+ * an older BSD server, until proven otherwise.  The newer
+ * BSD servers should be able to handle either definition,
+ * so it is better to use the wrong values if we don't
+ * know what type of server it is.
+ */
+int env_auto = 1;
+int old_env_var = OLD_ENV_VAR;
+int old_env_value = OLD_ENV_VALUE;
+# else
+#  define old_env_var OLD_ENV_VAR
+#  define old_env_value OLD_ENV_VALUE
+# endif
+#endif
+
+	void
+env_opt(buf, len)
+	register unsigned char *buf;
+	register int len;
+{
+	register unsigned char *ep = 0, *epc = 0;
+	register int i;
+
+	switch(buf[0]&0xff) {
+	case TELQUAL_SEND:
+		env_opt_start();
+		if (len == 1) {
+			env_opt_add(NULL);
+		} else for (i = 1; i < len; i++) {
+			switch (buf[i]&0xff) {
+#ifdef	OLD_ENVIRON
+			case OLD_ENV_VAR:
+# ifdef	ENV_HACK
+				if (telopt_environ == TELOPT_OLD_ENVIRON
+				    && env_auto) {
+					/* Server has the same definitions */
+					old_env_var = OLD_ENV_VAR;
+					old_env_value = OLD_ENV_VALUE;
+				}
+				/* FALL THROUGH */
+# endif
+			case OLD_ENV_VALUE:
+				/*
+				 * Although OLD_ENV_VALUE is not legal, we will
+				 * still recognize it, just in case it is an
+				 * old server that has VAR & VALUE mixed up...
+				 */
+				/* FALL THROUGH */
+#else
+			case NEW_ENV_VAR:
+#endif
+			case ENV_USERVAR:
+				if (ep) {
+					*epc = 0;
+					env_opt_add(ep);
+				}
+				ep = epc = &buf[i+1];
+				break;
+			case ENV_ESC:
+				i++;
+				/*FALL THROUGH*/
+			default:
+				if (epc)
+					*epc++ = buf[i];
+				break;
+			}
+		}
+		if (ep) {
+			*epc = 0;
+			env_opt_add(ep);
+		}
+		env_opt_end(1);
+		break;
+
+	case TELQUAL_IS:
+	case TELQUAL_INFO:
+		/* Ignore for now.  We shouldn't get it anyway. */
+		break;
+
+	default:
+		break;
+	}
+}
+
+#define	OPT_REPLY_SIZE	256
+unsigned char *opt_reply;
+unsigned char *opt_replyp;
+unsigned char *opt_replyend;
+
+	void
+env_opt_start()
+{
+	if (opt_reply)
+		opt_reply = (unsigned char *)realloc(opt_reply, OPT_REPLY_SIZE);
+	else
+		opt_reply = (unsigned char *)malloc(OPT_REPLY_SIZE);
+	if (opt_reply == NULL) {
+/*@*/		printf("env_opt_start: malloc()/realloc() failed!!!\n");
+		opt_reply = opt_replyp = opt_replyend = NULL;
+		return;
+	}
+	opt_replyp = opt_reply;
+	opt_replyend = opt_reply + OPT_REPLY_SIZE;
+	*opt_replyp++ = IAC;
+	*opt_replyp++ = SB;
+	*opt_replyp++ = telopt_environ;
+	*opt_replyp++ = TELQUAL_IS;
+}
+
+	void
+env_opt_start_info()
+{
+	env_opt_start();
+	if (opt_replyp)
+	    opt_replyp[-1] = TELQUAL_INFO;
+}
+
+	void
+env_opt_add(ep)
+	register unsigned char *ep;
+{
+	register unsigned char *vp, c;
+
+	if (opt_reply == NULL)		/*XXX*/
+		return;			/*XXX*/
+
+	if (ep == NULL || *ep == '\0') {
+		/* Send user defined variables first. */
+		env_default(1, 0);
+		while (ep = env_default(0, 0))
+			env_opt_add(ep);
+
+		/* Now add the list of well know variables.  */
+		env_default(1, 1);
+		while (ep = env_default(0, 1))
+			env_opt_add(ep);
+		return;
+	}
+	vp = env_getvalue(ep);
+	if (opt_replyp + (vp ? strlen((char *)vp) : 0) +
+				strlen((char *)ep) + 6 > opt_replyend)
+	{
+		register int len;
+		opt_replyend += OPT_REPLY_SIZE;
+		len = opt_replyend - opt_reply;
+		opt_reply = (unsigned char *)realloc(opt_reply, len);
+		if (opt_reply == NULL) {
+/*@*/			printf("env_opt_add: realloc() failed!!!\n");
+			opt_reply = opt_replyp = opt_replyend = NULL;
+			return;
+		}
+		opt_replyp = opt_reply + len - (opt_replyend - opt_replyp);
+		opt_replyend = opt_reply + len;
+	}
+	if (opt_welldefined(ep))
+#ifdef	OLD_ENVIRON
+		if (telopt_environ == TELOPT_OLD_ENVIRON)
+			*opt_replyp++ = old_env_var;
+		else
+#endif
+			*opt_replyp++ = NEW_ENV_VAR;
+	else
+		*opt_replyp++ = ENV_USERVAR;
+	for (;;) {
+		while (c = *ep++) {
+			switch(c&0xff) {
+			case IAC:
+				*opt_replyp++ = IAC;
+				break;
+			case NEW_ENV_VAR:
+			case NEW_ENV_VALUE:
+			case ENV_ESC:
+			case ENV_USERVAR:
+				*opt_replyp++ = ENV_ESC;
+				break;
+			}
+			*opt_replyp++ = c;
+		}
+		if (ep = vp) {
+#ifdef	OLD_ENVIRON
+			if (telopt_environ == TELOPT_OLD_ENVIRON)
+				*opt_replyp++ = old_env_value;
+			else
+#endif
+				*opt_replyp++ = NEW_ENV_VALUE;
+			vp = NULL;
+		} else
+			break;
+	}
+}
+
+	int
+opt_welldefined(ep)
+	char *ep;
+{
+	if ((strcmp(ep, "USER") == 0) ||
+	    (strcmp(ep, "DISPLAY") == 0) ||
+	    (strcmp(ep, "PRINTER") == 0) ||
+	    (strcmp(ep, "SYSTEMTYPE") == 0) ||
+	    (strcmp(ep, "JOB") == 0) ||
+	    (strcmp(ep, "ACCT") == 0))
+		return(1);
+	return(0);
+}
+	void
+env_opt_end(emptyok)
+	register int emptyok;
+{
+	register int len;
+
+	len = opt_replyp - opt_reply + 2;
+	if (emptyok || len > 6) {
+		*opt_replyp++ = IAC;
+		*opt_replyp++ = SE;
+		if (NETROOM() > len) {
+			ring_supply_data(&netoring, opt_reply, len);
+			printsub('>', &opt_reply[2], len - 2);
+		}
+/*@*/		else printf("slc_end_reply: not enough room\n");
+	}
+	if (opt_reply) {
+		free(opt_reply);
+		opt_reply = opt_replyp = opt_replyend = NULL;
+	}
+}
+
+
+
+    int
+telrcv()
+{
+    register int c;
+    register int scc;
+    register unsigned char *sbp;
+    int count;
+    int returnValue = 0;
+
+    scc = 0;
+    count = 0;
+    while (TTYROOM() > 2) {
+	if (scc == 0) {
+	    if (count) {
+		ring_consumed(&netiring, count);
+		returnValue = 1;
+		count = 0;
+	    }
+	    sbp = netiring.consume;
+	    scc = ring_full_consecutive(&netiring);
+	    if (scc == 0) {
+		/* No more data coming in */
+		break;
+	    }
+	}
+
+	c = *sbp++ & 0xff, scc--; count++;
+#ifdef	ENCRYPTION
+	if (decrypt_input)
+		c = (*decrypt_input)(c);
+#endif	/* ENCRYPTION */
+
+	switch (telrcv_state) {
+
+	case TS_CR:
+	    telrcv_state = TS_DATA;
+	    if (c == '\0') {
+		break;	/* Ignore \0 after CR */
+	    }
+	    else if ((c == '\n') && my_want_state_is_dont(TELOPT_ECHO) && !crmod) {
+		TTYADD(c);
+		break;
+	    }
+	    /* Else, fall through */
+
+	case TS_DATA:
+	    if (c == IAC) {
+		telrcv_state = TS_IAC;
+		break;
+	    }
+#	    if defined(TN3270)
+	    if (In3270) {
+		*Ifrontp++ = c;
+		while (scc > 0) {
+		    c = *sbp++ & 0377, scc--; count++;
+#ifdef	ENCRYPTION
+		    if (decrypt_input)
+			c = (*decrypt_input)(c);
+#endif	/* ENCRYPTION */
+		    if (c == IAC) {
+			telrcv_state = TS_IAC;
+			break;
+		    }
+		    *Ifrontp++ = c;
+		}
+	    } else
+#	    endif /* defined(TN3270) */
+		    /*
+		     * The 'crmod' hack (see following) is needed
+		     * since we can't * set CRMOD on output only.
+		     * Machines like MULTICS like to send \r without
+		     * \n; since we must turn off CRMOD to get proper
+		     * input, the mapping is done here (sigh).
+		     */
+	    if ((c == '\r') && my_want_state_is_dont(TELOPT_BINARY)) {
+		if (scc > 0) {
+		    c = *sbp&0xff;
+#ifdef	ENCRYPTION
+		    if (decrypt_input)
+			c = (*decrypt_input)(c);
+#endif	/* ENCRYPTION */
+		    if (c == 0) {
+			sbp++, scc--; count++;
+			/* a "true" CR */
+			TTYADD('\r');
+		    } else if (my_want_state_is_dont(TELOPT_ECHO) &&
+					(c == '\n')) {
+			sbp++, scc--; count++;
+			TTYADD('\n');
+		    } else {
+#ifdef	ENCRYPTION
+			if (decrypt_input)
+			    (*decrypt_input)(-1);
+#endif	/* ENCRYPTION */
+
+			TTYADD('\r');
+			if (crmod) {
+				TTYADD('\n');
+			}
+		    }
+		} else {
+		    telrcv_state = TS_CR;
+		    TTYADD('\r');
+		    if (crmod) {
+			    TTYADD('\n');
+		    }
+		}
+	    } else {
+		TTYADD(c);
+	    }
+	    continue;
+
+	case TS_IAC:
+process_iac:
+	    switch (c) {
+
+	    case WILL:
+		telrcv_state = TS_WILL;
+		continue;
+
+	    case WONT:
+		telrcv_state = TS_WONT;
+		continue;
+
+	    case DO:
+		telrcv_state = TS_DO;
+		continue;
+
+	    case DONT:
+		telrcv_state = TS_DONT;
+		continue;
+
+	    case DM:
+		    /*
+		     * We may have missed an urgent notification,
+		     * so make sure we flush whatever is in the
+		     * buffer currently.
+		     */
+		printoption("RCVD", IAC, DM);
+		SYNCHing = 1;
+		(void) ttyflush(1);
+		SYNCHing = stilloob();
+		settimer(gotDM);
+		break;
+
+	    case SB:
+		SB_CLEAR();
+		telrcv_state = TS_SB;
+		continue;
+
+#	    if defined(TN3270)
+	    case EOR:
+		if (In3270) {
+		    if (Ibackp == Ifrontp) {
+			Ibackp = Ifrontp = Ibuf;
+			ISend = 0;	/* should have been! */
+		    } else {
+			Ibackp += DataFromNetwork(Ibackp, Ifrontp-Ibackp, 1);
+			ISend = 1;
+		    }
+		}
+		printoption("RCVD", IAC, EOR);
+		break;
+#	    endif /* defined(TN3270) */
+
+	    case IAC:
+#	    if !defined(TN3270)
+		TTYADD(IAC);
+#	    else /* !defined(TN3270) */
+		if (In3270) {
+		    *Ifrontp++ = IAC;
+		} else {
+		    TTYADD(IAC);
+		}
+#	    endif /* !defined(TN3270) */
+		break;
+
+	    case NOP:
+	    case GA:
+	    default:
+		printoption("RCVD", IAC, c);
+		break;
+	    }
+	    telrcv_state = TS_DATA;
+	    continue;
+
+	case TS_WILL:
+	    printoption("RCVD", WILL, c);
+	    willoption(c);
+	    SetIn3270();
+	    telrcv_state = TS_DATA;
+	    continue;
+
+	case TS_WONT:
+	    printoption("RCVD", WONT, c);
+	    wontoption(c);
+	    SetIn3270();
+	    telrcv_state = TS_DATA;
+	    continue;
+
+	case TS_DO:
+	    printoption("RCVD", DO, c);
+	    dooption(c);
+	    SetIn3270();
+	    if (c == TELOPT_NAWS) {
+		sendnaws();
+	    } else if (c == TELOPT_LFLOW) {
+		localflow = 1;
+		setcommandmode();
+		setconnmode(0);
+	    }
+	    telrcv_state = TS_DATA;
+	    continue;
+
+	case TS_DONT:
+	    printoption("RCVD", DONT, c);
+	    dontoption(c);
+	    flushline = 1;
+	    setconnmode(0);	/* set new tty mode (maybe) */
+	    SetIn3270();
+	    telrcv_state = TS_DATA;
+	    continue;
+
+	case TS_SB:
+	    if (c == IAC) {
+		telrcv_state = TS_SE;
+	    } else {
+		SB_ACCUM(c);
+	    }
+	    continue;
+
+	case TS_SE:
+	    if (c != SE) {
+		if (c != IAC) {
+		    /*
+		     * This is an error.  We only expect to get
+		     * "IAC IAC" or "IAC SE".  Several things may
+		     * have happend.  An IAC was not doubled, the
+		     * IAC SE was left off, or another option got
+		     * inserted into the suboption are all possibilities.
+		     * If we assume that the IAC was not doubled,
+		     * and really the IAC SE was left off, we could
+		     * get into an infinate loop here.  So, instead,
+		     * we terminate the suboption, and process the
+		     * partial suboption if we can.
+		     */
+		    SB_ACCUM(IAC);
+		    SB_ACCUM(c);
+		    subpointer -= 2;
+		    SB_TERM();
+
+		    printoption("In SUBOPTION processing, RCVD", IAC, c);
+		    suboption();	/* handle sub-option */
+		    SetIn3270();
+		    telrcv_state = TS_IAC;
+		    goto process_iac;
+		}
+		SB_ACCUM(c);
+		telrcv_state = TS_SB;
+	    } else {
+		SB_ACCUM(IAC);
+		SB_ACCUM(SE);
+		subpointer -= 2;
+		SB_TERM();
+		suboption();	/* handle sub-option */
+		SetIn3270();
+		telrcv_state = TS_DATA;
+	    }
+	}
+    }
+    if (count)
+	ring_consumed(&netiring, count);
+    return returnValue||count;
+}
+
+static int bol = 1, local = 0;
+
+    int
+rlogin_susp()
+{
+    if (local) {
+	local = 0;
+	bol = 1;
+	command(0, "z\n", 2);
+	return(1);
+    }
+    return(0);
+}
+
+    static int
+telsnd()
+{
+    int tcc;
+    int count;
+    int returnValue = 0;
+    unsigned char *tbp;
+
+    tcc = 0;
+    count = 0;
+    while (NETROOM() > 2) {
+	register int sc;
+	register int c;
+
+	if (tcc == 0) {
+	    if (count) {
+		ring_consumed(&ttyiring, count);
+		returnValue = 1;
+		count = 0;
+	    }
+	    tbp = ttyiring.consume;
+	    tcc = ring_full_consecutive(&ttyiring);
+	    if (tcc == 0) {
+		break;
+	    }
+	}
+	c = *tbp++ & 0xff, sc = strip(c), tcc--; count++;
+	if (rlogin != _POSIX_VDISABLE) {
+		if (bol) {
+			bol = 0;
+			if (sc == rlogin) {
+				local = 1;
+				continue;
+			}
+		} else if (local) {
+			local = 0;
+			if (sc == '.' || c == termEofChar) {
+				bol = 1;
+				command(0, "close\n", 6);
+				continue;
+			}
+			if (sc == termSuspChar) {
+				bol = 1;
+				command(0, "z\n", 2);
+				continue;
+			}
+			if (sc == escape) {
+				command(0, (char *)tbp, tcc);
+				bol = 1;
+				count += tcc;
+				tcc = 0;
+				flushline = 1;
+				break;
+			}
+			if (sc != rlogin) {
+				++tcc;
+				--tbp;
+				--count;
+				c = sc = rlogin;
+			}
+		}
+		if ((sc == '\n') || (sc == '\r'))
+			bol = 1;
+	} else if (sc == escape) {
+	    /*
+	     * Double escape is a pass through of a single escape character.
+	     */
+	    if (tcc && strip(*tbp) == escape) {
+		tbp++;
+		tcc--;
+		count++;
+		bol = 0;
+	    } else {
+		command(0, (char *)tbp, tcc);
+		bol = 1;
+		count += tcc;
+		tcc = 0;
+		flushline = 1;
+		break;
+	    }
+	} else
+	    bol = 0;
+#ifdef	KLUDGELINEMODE
+	if (kludgelinemode && (globalmode&MODE_EDIT) && (sc == echoc)) {
+	    if (tcc > 0 && strip(*tbp) == echoc) {
+		tcc--; tbp++; count++;
+	    } else {
+		dontlecho = !dontlecho;
+		settimer(echotoggle);
+		setconnmode(0);
+		flushline = 1;
+		break;
+	    }
+	}
+#endif
+	if (MODE_LOCAL_CHARS(globalmode)) {
+	    if (TerminalSpecialChars(sc) == 0) {
+		bol = 1;
+		break;
+	    }
+	}
+	if (my_want_state_is_wont(TELOPT_BINARY)) {
+	    switch (c) {
+	    case '\n':
+		    /*
+		     * If we are in CRMOD mode (\r ==> \n)
+		     * on our local machine, then probably
+		     * a newline (unix) is CRLF (TELNET).
+		     */
+		if (MODE_LOCAL_CHARS(globalmode)) {
+		    NETADD('\r');
+		}
+		NETADD('\n');
+		bol = flushline = 1;
+		break;
+	    case '\r':
+		if (!crlf) {
+		    NET2ADD('\r', '\0');
+		} else {
+		    NET2ADD('\r', '\n');
+		}
+		bol = flushline = 1;
+		break;
+	    case IAC:
+		NET2ADD(IAC, IAC);
+		break;
+	    default:
+		NETADD(c);
+		break;
+	    }
+	} else if (c == IAC) {
+	    NET2ADD(IAC, IAC);
+	} else {
+	    NETADD(c);
+	}
+    }
+    if (count)
+	ring_consumed(&ttyiring, count);
+    return returnValue||count;		/* Non-zero if we did anything */
+}
+
+/*
+ * Scheduler()
+ *
+ * Try to do something.
+ *
+ * If we do something useful, return 1; else return 0.
+ *
+ */
+
+
+    int
+Scheduler(block)
+    int	block;			/* should we block in the select ? */
+{
+		/* One wants to be a bit careful about setting returnValue
+		 * to one, since a one implies we did some useful work,
+		 * and therefore probably won't be called to block next
+		 * time (TN3270 mode only).
+		 */
+    int returnValue;
+    int netin, netout, netex, ttyin, ttyout;
+
+    /* Decide which rings should be processed */
+
+    netout = ring_full_count(&netoring) &&
+	    (flushline ||
+		(my_want_state_is_wont(TELOPT_LINEMODE)
+#ifdef	KLUDGELINEMODE
+			&& (!kludgelinemode || my_want_state_is_do(TELOPT_SGA))
+#endif
+		) ||
+			my_want_state_is_will(TELOPT_BINARY));
+    ttyout = ring_full_count(&ttyoring);
+
+#if	defined(TN3270)
+    ttyin = ring_empty_count(&ttyiring) && (shell_active == 0);
+#else	/* defined(TN3270) */
+    ttyin = ring_empty_count(&ttyiring);
+#endif	/* defined(TN3270) */
+
+#if	defined(TN3270)
+    netin = ring_empty_count(&netiring);
+#   else /* !defined(TN3270) */
+    netin = !ISend && ring_empty_count(&netiring);
+#   endif /* !defined(TN3270) */
+
+    netex = !SYNCHing;
+
+    /* If we have seen a signal recently, reset things */
+#   if defined(TN3270) && defined(unix)
+    if (HaveInput) {
+	HaveInput = 0;
+	(void) signal(SIGIO, inputAvailable);
+    }
+#endif	/* defined(TN3270) && defined(unix) */
+
+    /* Call to system code to process rings */
+
+    returnValue = process_rings(netin, netout, netex, ttyin, ttyout, !block);
+
+    /* Now, look at the input rings, looking for work to do. */
+
+    if (ring_full_count(&ttyiring)) {
+#   if defined(TN3270)
+	if (In3270) {
+	    int c;
+
+	    c = DataFromTerminal(ttyiring.consume,
+					ring_full_consecutive(&ttyiring));
+	    if (c) {
+		returnValue = 1;
+		ring_consumed(&ttyiring, c);
+	    }
+	} else {
+#   endif /* defined(TN3270) */
+	    returnValue |= telsnd();
+#   if defined(TN3270)
+	}
+#   endif /* defined(TN3270) */
+    }
+
+    if (ring_full_count(&netiring)) {
+#	if !defined(TN3270)
+	returnValue |= telrcv();
+#	else /* !defined(TN3270) */
+	returnValue = Push3270();
+#	endif /* !defined(TN3270) */
+    }
+    return returnValue;
+}
+
+/*
+ * Select from tty and network...
+ */
+    void
+telnet(user)
+    char *user;
+{
+    sys_telnet_init();
+
+#if	defined(AUTHENTICATION) || defined(ENCRYPTION)
+    {
+	static char local_host[256] = { 0 };
+
+	if (!local_host[0]) {
+		gethostname(local_host, sizeof(local_host));
+		local_host[sizeof(local_host)-1] = 0;
+	}
+	auth_encrypt_init(local_host, hostname, "TELNET", 0);
+	auth_encrypt_user(user);
+    }
+#endif	/* defined(AUTHENTICATION) || defined(ENCRYPTION)  */
+#   if !defined(TN3270)
+    if (telnetport) {
+#if	defined(AUTHENTICATION)
+	if (autologin)
+		send_will(TELOPT_AUTHENTICATION, 1);
+#endif
+#ifdef	ENCRYPTION
+	send_do(TELOPT_ENCRYPT, 1);
+	send_will(TELOPT_ENCRYPT, 1);
+#endif	/* ENCRYPTION */
+	send_do(TELOPT_SGA, 1);
+	send_will(TELOPT_TTYPE, 1);
+	send_will(TELOPT_NAWS, 1);
+	send_will(TELOPT_TSPEED, 1);
+	send_will(TELOPT_LFLOW, 1);
+	send_will(TELOPT_LINEMODE, 1);
+	send_will(TELOPT_NEW_ENVIRON, 1);
+	send_do(TELOPT_STATUS, 1);
+	if (env_getvalue((unsigned char *)"DISPLAY"))
+	    send_will(TELOPT_XDISPLOC, 1);
+	if (eight)
+	    tel_enter_binary(eight);
+    }
+#   endif /* !defined(TN3270) */
+
+#   if !defined(TN3270)
+    for (;;) {
+	int schedValue;
+
+	while ((schedValue = Scheduler(0)) != 0) {
+	    if (schedValue == -1) {
+		setcommandmode();
+		return;
+	    }
+	}
+
+	if (Scheduler(1) == -1) {
+	    setcommandmode();
+	    return;
+	}
+    }
+#   else /* !defined(TN3270) */
+    for (;;) {
+	int schedValue;
+
+	while (!In3270 && !shell_active) {
+	    if (Scheduler(1) == -1) {
+		setcommandmode();
+		return;
+	    }
+	}
+
+	while ((schedValue = Scheduler(0)) != 0) {
+	    if (schedValue == -1) {
+		setcommandmode();
+		return;
+	    }
+	}
+		/* If there is data waiting to go out to terminal, don't
+		 * schedule any more data for the terminal.
+		 */
+	if (ring_full_count(&ttyoring)) {
+	    schedValue = 1;
+	} else {
+	    if (shell_active) {
+		if (shell_continue() == 0) {
+		    ConnectScreen();
+		}
+	    } else if (In3270) {
+		schedValue = DoTerminalOutput();
+	    }
+	}
+	if (schedValue && (shell_active == 0)) {
+	    if (Scheduler(1) == -1) {
+		setcommandmode();
+		return;
+	    }
+	}
+    }
+#   endif /* !defined(TN3270) */
+}
+
+#if	0	/* XXX - this not being in is a bug */
+/*
+ * nextitem()
+ *
+ *	Return the address of the next "item" in the TELNET data
+ * stream.  This will be the address of the next character if
+ * the current address is a user data character, or it will
+ * be the address of the character following the TELNET command
+ * if the current address is a TELNET IAC ("I Am a Command")
+ * character.
+ */
+
+    static char *
+nextitem(current)
+    char *current;
+{
+    if ((*current&0xff) != IAC) {
+	return current+1;
+    }
+    switch (*(current+1)&0xff) {
+    case DO:
+    case DONT:
+    case WILL:
+    case WONT:
+	return current+3;
+    case SB:		/* loop forever looking for the SE */
+	{
+	    register char *look = current+2;
+
+	    for (;;) {
+		if ((*look++&0xff) == IAC) {
+		    if ((*look++&0xff) == SE) {
+			return look;
+		    }
+		}
+	    }
+	}
+    default:
+	return current+2;
+    }
+}
+#endif	/* 0 */
+
+/*
+ * netclear()
+ *
+ *	We are about to do a TELNET SYNCH operation.  Clear
+ * the path to the network.
+ *
+ *	Things are a bit tricky since we may have sent the first
+ * byte or so of a previous TELNET command into the network.
+ * So, we have to scan the network buffer from the beginning
+ * until we are up to where we want to be.
+ *
+ *	A side effect of what we do, just to keep things
+ * simple, is to clear the urgent data pointer.  The principal
+ * caller should be setting the urgent data pointer AFTER calling
+ * us in any case.
+ */
+
+    static void
+netclear()
+{
+#if	0	/* XXX */
+    register char *thisitem, *next;
+    char *good;
+#define	wewant(p)	((nfrontp > p) && ((*p&0xff) == IAC) && \
+				((*(p+1)&0xff) != EC) && ((*(p+1)&0xff) != EL))
+
+    thisitem = netobuf;
+
+    while ((next = nextitem(thisitem)) <= netobuf.send) {
+	thisitem = next;
+    }
+
+    /* Now, thisitem is first before/at boundary. */
+
+    good = netobuf;	/* where the good bytes go */
+
+    while (netoring.add > thisitem) {
+	if (wewant(thisitem)) {
+	    int length;
+
+	    next = thisitem;
+	    do {
+		next = nextitem(next);
+	    } while (wewant(next) && (nfrontp > next));
+	    length = next-thisitem;
+	    memmove(good, thisitem, length);
+	    good += length;
+	    thisitem = next;
+	} else {
+	    thisitem = nextitem(thisitem);
+	}
+    }
+
+#endif	/* 0 */
+}
+
+/*
+ * These routines add various telnet commands to the data stream.
+ */
+
+    static void
+doflush()
+{
+    NET2ADD(IAC, DO);
+    NETADD(TELOPT_TM);
+    flushline = 1;
+    flushout = 1;
+    (void) ttyflush(1);			/* Flush/drop output */
+    /* do printoption AFTER flush, otherwise the output gets tossed... */
+    printoption("SENT", DO, TELOPT_TM);
+}
+
+    void
+xmitAO()
+{
+    NET2ADD(IAC, AO);
+    printoption("SENT", IAC, AO);
+    if (autoflush) {
+	doflush();
+    }
+}
+
+
+    void
+xmitEL()
+{
+    NET2ADD(IAC, EL);
+    printoption("SENT", IAC, EL);
+}
+
+    void
+xmitEC()
+{
+    NET2ADD(IAC, EC);
+    printoption("SENT", IAC, EC);
+}
+
+
+    int
+dosynch()
+{
+    netclear();			/* clear the path to the network */
+    NETADD(IAC);
+    setneturg();
+    NETADD(DM);
+    printoption("SENT", IAC, DM);
+    return 1;
+}
+
+int want_status_response = 0;
+
+    int
+get_status()
+{
+    unsigned char tmp[16];
+    register unsigned char *cp;
+
+    if (my_want_state_is_dont(TELOPT_STATUS)) {
+	printf("Remote side does not support STATUS option\n");
+	return 0;
+    }
+    cp = tmp;
+
+    *cp++ = IAC;
+    *cp++ = SB;
+    *cp++ = TELOPT_STATUS;
+    *cp++ = TELQUAL_SEND;
+    *cp++ = IAC;
+    *cp++ = SE;
+    if (NETROOM() >= cp - tmp) {
+	ring_supply_data(&netoring, tmp, cp-tmp);
+	printsub('>', tmp+2, cp - tmp - 2);
+    }
+    ++want_status_response;
+    return 1;
+}
+
+    void
+intp()
+{
+    NET2ADD(IAC, IP);
+    printoption("SENT", IAC, IP);
+    flushline = 1;
+    if (autoflush) {
+	doflush();
+    }
+    if (autosynch) {
+	dosynch();
+    }
+}
+
+    void
+sendbrk()
+{
+    NET2ADD(IAC, BREAK);
+    printoption("SENT", IAC, BREAK);
+    flushline = 1;
+    if (autoflush) {
+	doflush();
+    }
+    if (autosynch) {
+	dosynch();
+    }
+}
+
+    void
+sendabort()
+{
+    NET2ADD(IAC, ABORT);
+    printoption("SENT", IAC, ABORT);
+    flushline = 1;
+    if (autoflush) {
+	doflush();
+    }
+    if (autosynch) {
+	dosynch();
+    }
+}
+
+    void
+sendsusp()
+{
+    NET2ADD(IAC, SUSP);
+    printoption("SENT", IAC, SUSP);
+    flushline = 1;
+    if (autoflush) {
+	doflush();
+    }
+    if (autosynch) {
+	dosynch();
+    }
+}
+
+    void
+sendeof()
+{
+    NET2ADD(IAC, xEOF);
+    printoption("SENT", IAC, xEOF);
+}
+
+    void
+sendayt()
+{
+    NET2ADD(IAC, AYT);
+    printoption("SENT", IAC, AYT);
+}
+
+/*
+ * Send a window size update to the remote system.
+ */
+
+    void
+sendnaws()
+{
+    long rows, cols;
+    unsigned char tmp[16];
+    register unsigned char *cp;
+
+    if (my_state_is_wont(TELOPT_NAWS))
+	return;
+
+#define	PUTSHORT(cp, x) { if ((*cp++ = ((x)>>8)&0xff) == IAC) *cp++ = IAC; \
+			    if ((*cp++ = ((x))&0xff) == IAC) *cp++ = IAC; }
+
+    if (TerminalWindowSize(&rows, &cols) == 0) {	/* Failed */
+	return;
+    }
+
+    cp = tmp;
+
+    *cp++ = IAC;
+    *cp++ = SB;
+    *cp++ = TELOPT_NAWS;
+    PUTSHORT(cp, cols);
+    PUTSHORT(cp, rows);
+    *cp++ = IAC;
+    *cp++ = SE;
+    if (NETROOM() >= cp - tmp) {
+	ring_supply_data(&netoring, tmp, cp-tmp);
+	printsub('>', tmp+2, cp - tmp - 2);
+    }
+}
+
+    void
+tel_enter_binary(rw)
+    int rw;
+{
+    if (rw&1)
+	send_do(TELOPT_BINARY, 1);
+    if (rw&2)
+	send_will(TELOPT_BINARY, 1);
+}
+
+    void
+tel_leave_binary(rw)
+    int rw;
+{
+    if (rw&1)
+	send_dont(TELOPT_BINARY, 1);
+    if (rw&2)
+	send_wont(TELOPT_BINARY, 1);
+}
diff --git a/contrib/telnet/telnet/terminal.c b/contrib/telnet/telnet/terminal.c
new file mode 100644
index 0000000..b5ceeda
--- /dev/null
+++ b/contrib/telnet/telnet/terminal.c
@@ -0,0 +1,240 @@
+/*
+ * Copyright (c) 1988, 1990, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef lint
+static char sccsid[] = "@(#)terminal.c	8.2 (Berkeley) 2/16/95";
+#endif /* not lint */
+
+#include <arpa/telnet.h>
+#include <sys/types.h>
+
+#include "ring.h"
+
+#include "externs.h"
+#include "types.h"
+
+Ring		ttyoring, ttyiring;
+unsigned char	ttyobuf[2*BUFSIZ], ttyibuf[BUFSIZ];
+
+int termdata;			/* Debugging flag */
+
+#ifdef	USE_TERMIO
+# ifndef VDISCARD
+cc_t termFlushChar;
+# endif
+# ifndef VLNEXT
+cc_t termLiteralNextChar;
+# endif
+# ifndef VSUSP
+cc_t termSuspChar;
+# endif
+# ifndef VWERASE
+cc_t termWerasChar;
+# endif
+# ifndef VREPRINT
+cc_t termRprntChar;
+# endif
+# ifndef VSTART
+cc_t termStartChar;
+# endif
+# ifndef VSTOP
+cc_t termStopChar;
+# endif
+# ifndef VEOL
+cc_t termForw1Char;
+# endif
+# ifndef VEOL2
+cc_t termForw2Char;
+# endif
+# ifndef VSTATUS
+cc_t termAytChar;
+# endif
+#else
+cc_t termForw2Char;
+cc_t termAytChar;
+#endif
+
+/*
+ * initialize the terminal data structures.
+ */
+
+    void
+init_terminal()
+{
+    if (ring_init(&ttyoring, ttyobuf, sizeof ttyobuf) != 1) {
+	exit(1);
+    }
+    if (ring_init(&ttyiring, ttyibuf, sizeof ttyibuf) != 1) {
+	exit(1);
+    }
+    autoflush = TerminalAutoFlush();
+}
+
+
+/*
+ *		Send as much data as possible to the terminal.
+ *
+ *		Return value:
+ *			-1: No useful work done, data waiting to go out.
+ *			 0: No data was waiting, so nothing was done.
+ *			 1: All waiting data was written out.
+ *			 n: All data - n was written out.
+ */
+
+
+    int
+ttyflush(drop)
+    int drop;
+{
+    register int n, n0, n1;
+
+    n0 = ring_full_count(&ttyoring);
+    if ((n1 = n = ring_full_consecutive(&ttyoring)) > 0) {
+	if (drop) {
+	    TerminalFlushOutput();
+	    /* we leave 'n' alone! */
+	} else {
+	    n = TerminalWrite(ttyoring.consume, n);
+	}
+    }
+    if (n > 0) {
+	if (termdata && n) {
+	    Dump('>', ttyoring.consume, n);
+	}
+	/*
+	 * If we wrote everything, and the full count is
+	 * larger than what we wrote, then write the
+	 * rest of the buffer.
+	 */
+	if (n1 == n && n0 > n) {
+		n1 = n0 - n;
+		if (!drop)
+			n1 = TerminalWrite(ttyoring.bottom, n1);
+		if (n1 > 0)
+			n += n1;
+	}
+	ring_consumed(&ttyoring, n);
+    }
+    if (n < 0)
+	return -1;
+    if (n == n0) {
+	if (n0)
+	    return -1;
+	return 0;
+    }
+    return n0 - n + 1;
+}
+
+
+/*
+ * These routines decides on what the mode should be (based on the values
+ * of various global variables).
+ */
+
+
+    int
+getconnmode()
+{
+    extern int linemode;
+    int mode = 0;
+#ifdef	KLUDGELINEMODE
+    extern int kludgelinemode;
+#endif
+
+    if (In3270)
+	return(MODE_FLOW);
+
+    if (my_want_state_is_dont(TELOPT_ECHO))
+	mode |= MODE_ECHO;
+
+    if (localflow)
+	mode |= MODE_FLOW;
+
+    if (my_want_state_is_will(TELOPT_BINARY))
+	mode |= MODE_INBIN;
+
+    if (his_want_state_is_will(TELOPT_BINARY))
+	mode |= MODE_OUTBIN;
+
+#ifdef	KLUDGELINEMODE
+    if (kludgelinemode) {
+	if (my_want_state_is_dont(TELOPT_SGA)) {
+	    mode |= (MODE_TRAPSIG|MODE_EDIT);
+	    if (dontlecho && (clocks.echotoggle > clocks.modenegotiated)) {
+		mode &= ~MODE_ECHO;
+	    }
+	}
+	return(mode);
+    }
+#endif
+    if (my_want_state_is_will(TELOPT_LINEMODE))
+	mode |= linemode;
+    return(mode);
+}
+
+    void
+setconnmode(force)
+    int force;
+{
+#ifdef	ENCRYPTION
+    static int enc_passwd = 0;
+#endif	/* ENCRYPTION */
+    register int newmode;
+
+    newmode = getconnmode()|(force?MODE_FORCE:0);
+
+    TerminalNewMode(newmode);
+
+#ifdef  ENCRYPTION
+    if ((newmode & (MODE_ECHO|MODE_EDIT)) == MODE_EDIT) {
+	if (my_want_state_is_will(TELOPT_ENCRYPT)
+				&& (enc_passwd == 0) && !encrypt_output) {
+	    encrypt_request_start(0, 0);
+	    enc_passwd = 1;
+	}
+    } else {
+	if (enc_passwd) {
+	    encrypt_request_end();
+	    enc_passwd = 0;
+	}
+    }
+#endif	/* ENCRYPTION */
+
+}
+
+
+    void
+setcommandmode()
+{
+    TerminalNewMode(-1);
+}
diff --git a/contrib/telnet/telnet/tn3270.c b/contrib/telnet/telnet/tn3270.c
new file mode 100644
index 0000000..a75cd1e
--- /dev/null
+++ b/contrib/telnet/telnet/tn3270.c
@@ -0,0 +1,411 @@
+/*
+ * Copyright (c) 1988, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef lint
+static char sccsid[] = "@(#)tn3270.c	8.2 (Berkeley) 5/30/95";
+#endif /* not lint */
+
+#include <sys/types.h>
+#include <arpa/telnet.h>
+
+#include "general.h"
+
+#include "defines.h"
+#include "ring.h"
+#include "externs.h"
+#include "fdset.h"
+
+#if	defined(TN3270)
+
+#include "../ctlr/screen.h"
+#include "../general/globals.h"
+
+#include "../sys_curses/telextrn.h"
+#include "../ctlr/externs.h"
+
+#if	defined(unix)
+int
+	HaveInput,		/* There is input available to scan */
+	cursesdata,		/* Do we dump curses data? */
+	sigiocount;		/* Number of times we got a SIGIO */
+
+char	tline[200];
+char	*transcom = 0;	/* transparent mode command (default: none) */
+#endif	/* defined(unix) */
+
+char	Ibuf[8*BUFSIZ], *Ifrontp, *Ibackp;
+
+static char	sb_terminal[] = { IAC, SB,
+			TELOPT_TTYPE, TELQUAL_IS,
+			'I', 'B', 'M', '-', '3', '2', '7', '8', '-', '2',
+			IAC, SE };
+#define	SBTERMMODEL	13
+
+static int
+	Sent3270TerminalType;	/* Have we said we are a 3270? */
+
+#endif	/* defined(TN3270) */
+
+
+    void
+init_3270()
+{
+#if	defined(TN3270)
+#if	defined(unix)
+    HaveInput = 0;
+    sigiocount = 0;
+#endif	/* defined(unix) */
+    Sent3270TerminalType = 0;
+    Ifrontp = Ibackp = Ibuf;
+    init_ctlr();		/* Initialize some things */
+    init_keyboard();
+    init_screen();
+    init_system();
+#endif	/* defined(TN3270) */
+}
+
+
+#if	defined(TN3270)
+
+/*
+ * DataToNetwork - queue up some data to go to network.  If "done" is set,
+ * then when last byte is queued, we add on an IAC EOR sequence (so,
+ * don't call us with "done" until you want that done...)
+ *
+ * We actually do send all the data to the network buffer, since our
+ * only client needs for us to do that.
+ */
+
+    int
+DataToNetwork(buffer, count, done)
+    register char *buffer;	/* where the data is */
+    register int  count;	/* how much to send */
+    int		  done;		/* is this the last of a logical block */
+{
+    register int loop, c;
+    int origCount;
+
+    origCount = count;
+
+    while (count) {
+	/* If not enough room for EORs, IACs, etc., wait */
+	if (NETROOM() < 6) {
+	    fd_set o;
+
+	    FD_ZERO(&o);
+	    netflush();
+	    while (NETROOM() < 6) {
+		FD_SET(net, &o);
+		(void) select(net+1, (fd_set *) 0, &o, (fd_set *) 0,
+						(struct timeval *) 0);
+		netflush();
+	    }
+	}
+	c = ring_empty_count(&netoring);
+	if (c > count) {
+	    c = count;
+	}
+	loop = c;
+	while (loop) {
+	    if (((unsigned char)*buffer) == IAC) {
+		break;
+	    }
+	    buffer++;
+	    loop--;
+	}
+	if ((c = c-loop)) {
+	    ring_supply_data(&netoring, buffer-c, c);
+	    count -= c;
+	}
+	if (loop) {
+	    NET2ADD(IAC, IAC);
+	    count--;
+	    buffer++;
+	}
+    }
+
+    if (done) {
+	NET2ADD(IAC, EOR);
+	netflush();		/* try to move along as quickly as ... */
+    }
+    return(origCount - count);
+}
+
+
+#if	defined(unix)
+    void
+inputAvailable(signo)
+	int signo;
+{
+    HaveInput = 1;
+    sigiocount++;
+}
+#endif	/* defined(unix) */
+
+    void
+outputPurge()
+{
+    (void) ttyflush(1);
+}
+
+
+/*
+ * The following routines are places where the various tn3270
+ * routines make calls into telnet.c.
+ */
+
+/*
+ * DataToTerminal - queue up some data to go to terminal.
+ *
+ * Note: there are people who call us and depend on our processing
+ * *all* the data at one time (thus the select).
+ */
+
+    int
+DataToTerminal(buffer, count)
+    register char	*buffer;		/* where the data is */
+    register int	count;			/* how much to send */
+{
+    register int c;
+    int origCount;
+
+    origCount = count;
+
+    while (count) {
+	if (TTYROOM() == 0) {
+#if	defined(unix)
+	    fd_set o;
+
+	    FD_ZERO(&o);
+#endif	/* defined(unix) */
+	    (void) ttyflush(0);
+	    while (TTYROOM() == 0) {
+#if	defined(unix)
+		FD_SET(tout, &o);
+		(void) select(tout+1, (fd_set *) 0, &o, (fd_set *) 0,
+						(struct timeval *) 0);
+#endif	/* defined(unix) */
+		(void) ttyflush(0);
+	    }
+	}
+	c = TTYROOM();
+	if (c > count) {
+	    c = count;
+	}
+	ring_supply_data(&ttyoring, buffer, c);
+	count -= c;
+	buffer += c;
+    }
+    return(origCount);
+}
+
+
+/*
+ * Push3270 - Try to send data along the 3270 output (to screen) direction.
+ */
+
+    int
+Push3270()
+{
+    int save = ring_full_count(&netiring);
+
+    if (save) {
+	if (Ifrontp+save > Ibuf+sizeof Ibuf) {
+	    if (Ibackp != Ibuf) {
+		memmove(Ibuf, Ibackp, Ifrontp-Ibackp);
+		Ifrontp -= (Ibackp-Ibuf);
+		Ibackp = Ibuf;
+	    }
+	}
+	if (Ifrontp+save < Ibuf+sizeof Ibuf) {
+	    (void)telrcv();
+	}
+    }
+    return save != ring_full_count(&netiring);
+}
+
+
+/*
+ * Finish3270 - get the last dregs of 3270 data out to the terminal
+ *		before quitting.
+ */
+
+    void
+Finish3270()
+{
+    while (Push3270() || !DoTerminalOutput()) {
+#if	defined(unix)
+	HaveInput = 0;
+#endif	/* defined(unix) */
+	;
+    }
+}
+
+
+/* StringToTerminal - output a null terminated string to the terminal */
+
+    void
+StringToTerminal(s)
+    char *s;
+{
+    int count;
+
+    count = strlen(s);
+    if (count) {
+	(void) DataToTerminal(s, count);	/* we know it always goes... */
+    }
+}
+
+
+#if	((!defined(NOT43)) || defined(PUTCHAR))
+/* _putchar - output a single character to the terminal.  This name is so that
+ *	curses(3x) can call us to send out data.
+ */
+
+    void
+_putchar(c)
+    char c;
+{
+#if	defined(sun)		/* SunOS 4.0 bug */
+    c &= 0x7f;
+#endif	/* defined(sun) */
+    if (cursesdata) {
+	Dump('>', &c, 1);
+    }
+    if (!TTYROOM()) {
+	(void) DataToTerminal(&c, 1);
+    } else {
+	TTYADD(c);
+    }
+}
+#endif	/* ((!defined(NOT43)) || defined(PUTCHAR)) */
+
+    void
+SetIn3270()
+{
+    if (Sent3270TerminalType && my_want_state_is_will(TELOPT_BINARY)
+		&& my_want_state_is_do(TELOPT_BINARY) && !donebinarytoggle) {
+	if (!In3270) {
+	    In3270 = 1;
+	    Init3270();		/* Initialize 3270 functions */
+	    /* initialize terminal key mapping */
+	    InitTerminal();	/* Start terminal going */
+	    setconnmode(0);
+	}
+    } else {
+	if (In3270) {
+	    StopScreen(1);
+	    In3270 = 0;
+	    Stop3270();		/* Tell 3270 we aren't here anymore */
+	    setconnmode(0);
+	}
+    }
+}
+
+/*
+ * tn3270_ttype()
+ *
+ *	Send a response to a terminal type negotiation.
+ *
+ *	Return '0' if no more responses to send; '1' if a response sent.
+ */
+
+    int
+tn3270_ttype()
+{
+    /*
+     * Try to send a 3270 type terminal name.  Decide which one based
+     * on the format of our screen, and (in the future) color
+     * capaiblities.
+     */
+    InitTerminal();		/* Sets MaxNumberColumns, MaxNumberLines */
+    if ((MaxNumberLines >= 24) && (MaxNumberColumns >= 80)) {
+	Sent3270TerminalType = 1;
+	if ((MaxNumberLines >= 27) && (MaxNumberColumns >= 132)) {
+	    MaxNumberLines = 27;
+	    MaxNumberColumns = 132;
+	    sb_terminal[SBTERMMODEL] = '5';
+	} else if (MaxNumberLines >= 43) {
+	    MaxNumberLines = 43;
+	    MaxNumberColumns = 80;
+	    sb_terminal[SBTERMMODEL] = '4';
+	} else if (MaxNumberLines >= 32) {
+	    MaxNumberLines = 32;
+	    MaxNumberColumns = 80;
+	    sb_terminal[SBTERMMODEL] = '3';
+	} else {
+	    MaxNumberLines = 24;
+	    MaxNumberColumns = 80;
+	    sb_terminal[SBTERMMODEL] = '2';
+	}
+	NumberLines = 24;		/* before we start out... */
+	NumberColumns = 80;
+	ScreenSize = NumberLines*NumberColumns;
+	if ((MaxNumberLines*MaxNumberColumns) > MAXSCREENSIZE) {
+	    ExitString("Programming error:  MAXSCREENSIZE too small.\n",
+								1);
+	    /*NOTREACHED*/
+	}
+	printsub('>', sb_terminal+2, sizeof sb_terminal-2);
+	ring_supply_data(&netoring, sb_terminal, sizeof sb_terminal);
+	return 1;
+    } else {
+	return 0;
+    }
+}
+
+#if	defined(unix)
+	int
+settranscom(argc, argv)
+	int argc;
+	char *argv[];
+{
+	int i;
+
+	if (argc == 1 && transcom) {
+	   transcom = 0;
+	}
+	if (argc == 1) {
+	   return 1;
+	}
+	transcom = tline;
+	(void) strcpy(transcom, argv[1]);
+	for (i = 2; i < argc; ++i) {
+	    (void) strcat(transcom, " ");
+	    (void) strcat(transcom, argv[i]);
+	}
+	return 1;
+}
+#endif	/* defined(unix) */
+
+#endif	/* defined(TN3270) */
diff --git a/contrib/telnet/telnet/types.h b/contrib/telnet/telnet/types.h
new file mode 100644
index 0000000..191d311
--- /dev/null
+++ b/contrib/telnet/telnet/types.h
@@ -0,0 +1,52 @@
+/*
+ * Copyright (c) 1988, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *	@(#)types.h	8.1 (Berkeley) 6/6/93
+ */
+
+typedef struct {
+    char *modedescriptions;
+    char modetype;
+} Modelist;
+
+extern Modelist modelist[];
+
+typedef struct {
+    int
+	system,			/* what the current time is */
+	echotoggle,		/* last time user entered echo character */
+	modenegotiated,		/* last time operating mode negotiated */
+	didnetreceive,		/* last time we read data from network */
+	gotDM;			/* when did we last see a data mark */
+} Clocks;
+
+extern Clocks clocks;
diff --git a/contrib/telnet/telnet/utilities.c b/contrib/telnet/telnet/utilities.c
new file mode 100644
index 0000000..06d08a4
--- /dev/null
+++ b/contrib/telnet/telnet/utilities.c
@@ -0,0 +1,939 @@
+/*
+ * Copyright (c) 1988, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef lint
+static char sccsid[] = "@(#)utilities.c	8.3 (Berkeley) 5/30/95";
+#endif /* not lint */
+
+#define	TELOPTS
+#define	TELCMDS
+#define	SLC_NAMES
+#include <arpa/telnet.h>
+#include <sys/types.h>
+#include <sys/time.h>
+
+#include <ctype.h>
+
+#include "general.h"
+
+#include "fdset.h"
+
+#include "ring.h"
+
+#include "defines.h"
+
+#include "externs.h"
+
+FILE	*NetTrace = 0;		/* Not in bss, since needs to stay */
+int	prettydump;
+
+/*
+ * upcase()
+ *
+ *	Upcase (in place) the argument.
+ */
+
+    void
+upcase(argument)
+    register char *argument;
+{
+    register int c;
+
+    while ((c = *argument) != 0) {
+	if (islower(c)) {
+	    *argument = toupper(c);
+	}
+	argument++;
+    }
+}
+
+/*
+ * SetSockOpt()
+ *
+ * Compensate for differences in 4.2 and 4.3 systems.
+ */
+
+    int
+SetSockOpt(fd, level, option, yesno)
+    int fd, level, option, yesno;
+{
+#ifndef	NOT43
+    return setsockopt(fd, level, option,
+				(char *)&yesno, sizeof yesno);
+#else	/* NOT43 */
+    if (yesno == 0) {		/* Can't do that in 4.2! */
+	fprintf(stderr, "Error: attempt to turn off an option 0x%x.\n",
+				option);
+	return -1;
+    }
+    return setsockopt(fd, level, option, 0, 0);
+#endif	/* NOT43 */
+}
+
+/*
+ * The following are routines used to print out debugging information.
+ */
+
+unsigned char NetTraceFile[256] = "(standard output)";
+
+    void
+SetNetTrace(file)
+    register char *file;
+{
+    if (NetTrace && NetTrace != stdout)
+	fclose(NetTrace);
+    if (file  && (strcmp(file, "-") != 0)) {
+	NetTrace = fopen(file, "w");
+	if (NetTrace) {
+	    strcpy((char *)NetTraceFile, file);
+	    return;
+	}
+	fprintf(stderr, "Cannot open %s.\n", file);
+    }
+    NetTrace = stdout;
+    strcpy((char *)NetTraceFile, "(standard output)");
+}
+
+    void
+Dump(direction, buffer, length)
+    char direction;
+    unsigned char *buffer;
+    int length;
+{
+#   define BYTES_PER_LINE	32
+#   define min(x,y)	((x<y)? x:y)
+    unsigned char *pThis;
+    int offset;
+    extern pettydump;
+
+    offset = 0;
+
+    while (length) {
+	/* print one line */
+	fprintf(NetTrace, "%c 0x%x\t", direction, offset);
+	pThis = buffer;
+	if (prettydump) {
+	    buffer = buffer + min(length, BYTES_PER_LINE/2);
+	    while (pThis < buffer) {
+		fprintf(NetTrace, "%c%.2x",
+		    (((*pThis)&0xff) == 0xff) ? '*' : ' ',
+		    (*pThis)&0xff);
+		pThis++;
+	    }
+	    length -= BYTES_PER_LINE/2;
+	    offset += BYTES_PER_LINE/2;
+	} else {
+	    buffer = buffer + min(length, BYTES_PER_LINE);
+	    while (pThis < buffer) {
+		fprintf(NetTrace, "%.2x", (*pThis)&0xff);
+		pThis++;
+	    }
+	    length -= BYTES_PER_LINE;
+	    offset += BYTES_PER_LINE;
+	}
+	if (NetTrace == stdout) {
+	    fprintf(NetTrace, "\r\n");
+	} else {
+	    fprintf(NetTrace, "\n");
+	}
+	if (length < 0) {
+	    fflush(NetTrace);
+	    return;
+	}
+	/* find next unique line */
+    }
+    fflush(NetTrace);
+}
+
+
+	void
+printoption(direction, cmd, option)
+	char *direction;
+	int cmd, option;
+{
+	if (!showoptions)
+		return;
+	if (cmd == IAC) {
+		if (TELCMD_OK(option))
+		    fprintf(NetTrace, "%s IAC %s", direction, TELCMD(option));
+		else
+		    fprintf(NetTrace, "%s IAC %d", direction, option);
+	} else {
+		register char *fmt;
+		fmt = (cmd == WILL) ? "WILL" : (cmd == WONT) ? "WONT" :
+			(cmd == DO) ? "DO" : (cmd == DONT) ? "DONT" : 0;
+		if (fmt) {
+		    fprintf(NetTrace, "%s %s ", direction, fmt);
+		    if (TELOPT_OK(option))
+			fprintf(NetTrace, "%s", TELOPT(option));
+		    else if (option == TELOPT_EXOPL)
+			fprintf(NetTrace, "EXOPL");
+		    else
+			fprintf(NetTrace, "%d", option);
+		} else
+		    fprintf(NetTrace, "%s %d %d", direction, cmd, option);
+	}
+	if (NetTrace == stdout) {
+	    fprintf(NetTrace, "\r\n");
+	    fflush(NetTrace);
+	} else {
+	    fprintf(NetTrace, "\n");
+	}
+	return;
+}
+
+    void
+optionstatus()
+{
+    register int i;
+    extern char will_wont_resp[], do_dont_resp[];
+
+    for (i = 0; i < 256; i++) {
+	if (do_dont_resp[i]) {
+	    if (TELOPT_OK(i))
+		printf("resp DO_DONT %s: %d\n", TELOPT(i), do_dont_resp[i]);
+	    else if (TELCMD_OK(i))
+		printf("resp DO_DONT %s: %d\n", TELCMD(i), do_dont_resp[i]);
+	    else
+		printf("resp DO_DONT %d: %d\n", i,
+				do_dont_resp[i]);
+	    if (my_want_state_is_do(i)) {
+		if (TELOPT_OK(i))
+		    printf("want DO   %s\n", TELOPT(i));
+		else if (TELCMD_OK(i))
+		    printf("want DO   %s\n", TELCMD(i));
+		else
+		    printf("want DO   %d\n", i);
+	    } else {
+		if (TELOPT_OK(i))
+		    printf("want DONT %s\n", TELOPT(i));
+		else if (TELCMD_OK(i))
+		    printf("want DONT %s\n", TELCMD(i));
+		else
+		    printf("want DONT %d\n", i);
+	    }
+	} else {
+	    if (my_state_is_do(i)) {
+		if (TELOPT_OK(i))
+		    printf("     DO   %s\n", TELOPT(i));
+		else if (TELCMD_OK(i))
+		    printf("     DO   %s\n", TELCMD(i));
+		else
+		    printf("     DO   %d\n", i);
+	    }
+	}
+	if (will_wont_resp[i]) {
+	    if (TELOPT_OK(i))
+		printf("resp WILL_WONT %s: %d\n", TELOPT(i), will_wont_resp[i]);
+	    else if (TELCMD_OK(i))
+		printf("resp WILL_WONT %s: %d\n", TELCMD(i), will_wont_resp[i]);
+	    else
+		printf("resp WILL_WONT %d: %d\n",
+				i, will_wont_resp[i]);
+	    if (my_want_state_is_will(i)) {
+		if (TELOPT_OK(i))
+		    printf("want WILL %s\n", TELOPT(i));
+		else if (TELCMD_OK(i))
+		    printf("want WILL %s\n", TELCMD(i));
+		else
+		    printf("want WILL %d\n", i);
+	    } else {
+		if (TELOPT_OK(i))
+		    printf("want WONT %s\n", TELOPT(i));
+		else if (TELCMD_OK(i))
+		    printf("want WONT %s\n", TELCMD(i));
+		else
+		    printf("want WONT %d\n", i);
+	    }
+	} else {
+	    if (my_state_is_will(i)) {
+		if (TELOPT_OK(i))
+		    printf("     WILL %s\n", TELOPT(i));
+		else if (TELCMD_OK(i))
+		    printf("     WILL %s\n", TELCMD(i));
+		else
+		    printf("     WILL %d\n", i);
+	    }
+	}
+    }
+
+}
+
+    void
+printsub(direction, pointer, length)
+    char direction;	/* '<' or '>' */
+    unsigned char *pointer;	/* where suboption data sits */
+    int		  length;	/* length of suboption data */
+{
+    register int i;
+    char buf[512];
+    extern int want_status_response;
+
+    if (showoptions || direction == 0 ||
+	(want_status_response && (pointer[0] == TELOPT_STATUS))) {
+	if (direction) {
+	    fprintf(NetTrace, "%s IAC SB ",
+				(direction == '<')? "RCVD":"SENT");
+	    if (length >= 3) {
+		register int j;
+
+		i = pointer[length-2];
+		j = pointer[length-1];
+
+		if (i != IAC || j != SE) {
+		    fprintf(NetTrace, "(terminated by ");
+		    if (TELOPT_OK(i))
+			fprintf(NetTrace, "%s ", TELOPT(i));
+		    else if (TELCMD_OK(i))
+			fprintf(NetTrace, "%s ", TELCMD(i));
+		    else
+			fprintf(NetTrace, "%d ", i);
+		    if (TELOPT_OK(j))
+			fprintf(NetTrace, "%s", TELOPT(j));
+		    else if (TELCMD_OK(j))
+			fprintf(NetTrace, "%s", TELCMD(j));
+		    else
+			fprintf(NetTrace, "%d", j);
+		    fprintf(NetTrace, ", not IAC SE!) ");
+		}
+	    }
+	    length -= 2;
+	}
+	if (length < 1) {
+	    fprintf(NetTrace, "(Empty suboption??\?)");
+	    if (NetTrace == stdout)
+		fflush(NetTrace);
+	    return;
+	}
+	switch (pointer[0]) {
+	case TELOPT_TTYPE:
+	    fprintf(NetTrace, "TERMINAL-TYPE ");
+	    switch (pointer[1]) {
+	    case TELQUAL_IS:
+		fprintf(NetTrace, "IS \"%.*s\"", length-2, (char *)pointer+2);
+		break;
+	    case TELQUAL_SEND:
+		fprintf(NetTrace, "SEND");
+		break;
+	    default:
+		fprintf(NetTrace,
+				"- unknown qualifier %d (0x%x).",
+				pointer[1], pointer[1]);
+	    }
+	    break;
+	case TELOPT_TSPEED:
+	    fprintf(NetTrace, "TERMINAL-SPEED");
+	    if (length < 2) {
+		fprintf(NetTrace, " (empty suboption??\?)");
+		break;
+	    }
+	    switch (pointer[1]) {
+	    case TELQUAL_IS:
+		fprintf(NetTrace, " IS ");
+		fprintf(NetTrace, "%.*s", length-2, (char *)pointer+2);
+		break;
+	    default:
+		if (pointer[1] == 1)
+		    fprintf(NetTrace, " SEND");
+		else
+		    fprintf(NetTrace, " %d (unknown)", pointer[1]);
+		for (i = 2; i < length; i++)
+		    fprintf(NetTrace, " ?%d?", pointer[i]);
+		break;
+	    }
+	    break;
+
+	case TELOPT_LFLOW:
+	    fprintf(NetTrace, "TOGGLE-FLOW-CONTROL");
+	    if (length < 2) {
+		fprintf(NetTrace, " (empty suboption??\?)");
+		break;
+	    }
+	    switch (pointer[1]) {
+	    case LFLOW_OFF:
+		fprintf(NetTrace, " OFF"); break;
+	    case LFLOW_ON:
+		fprintf(NetTrace, " ON"); break;
+	    case LFLOW_RESTART_ANY:
+		fprintf(NetTrace, " RESTART-ANY"); break;
+	    case LFLOW_RESTART_XON:
+		fprintf(NetTrace, " RESTART-XON"); break;
+	    default:
+		fprintf(NetTrace, " %d (unknown)", pointer[1]);
+	    }
+	    for (i = 2; i < length; i++)
+		fprintf(NetTrace, " ?%d?", pointer[i]);
+	    break;
+
+	case TELOPT_NAWS:
+	    fprintf(NetTrace, "NAWS");
+	    if (length < 2) {
+		fprintf(NetTrace, " (empty suboption??\?)");
+		break;
+	    }
+	    if (length == 2) {
+		fprintf(NetTrace, " ?%d?", pointer[1]);
+		break;
+	    }
+	    fprintf(NetTrace, " %d %d (%d)",
+		pointer[1], pointer[2],
+		(int)((((unsigned int)pointer[1])<<8)|((unsigned int)pointer[2])));
+	    if (length == 4) {
+		fprintf(NetTrace, " ?%d?", pointer[3]);
+		break;
+	    }
+	    fprintf(NetTrace, " %d %d (%d)",
+		pointer[3], pointer[4],
+		(int)((((unsigned int)pointer[3])<<8)|((unsigned int)pointer[4])));
+	    for (i = 5; i < length; i++)
+		fprintf(NetTrace, " ?%d?", pointer[i]);
+	    break;
+
+#if	defined(AUTHENTICATION)
+	case TELOPT_AUTHENTICATION:
+	    fprintf(NetTrace, "AUTHENTICATION");
+	    if (length < 2) {
+		fprintf(NetTrace, " (empty suboption??\?)");
+		break;
+	    }
+	    switch (pointer[1]) {
+	    case TELQUAL_REPLY:
+	    case TELQUAL_IS:
+		fprintf(NetTrace, " %s ", (pointer[1] == TELQUAL_IS) ?
+							"IS" : "REPLY");
+		if (AUTHTYPE_NAME_OK(pointer[2]))
+		    fprintf(NetTrace, "%s ", AUTHTYPE_NAME(pointer[2]));
+		else
+		    fprintf(NetTrace, "%d ", pointer[2]);
+		if (length < 3) {
+		    fprintf(NetTrace, "(partial suboption??\?)");
+		    break;
+		}
+		fprintf(NetTrace, "%s|%s",
+			((pointer[3] & AUTH_WHO_MASK) == AUTH_WHO_CLIENT) ?
+			"CLIENT" : "SERVER",
+			((pointer[3] & AUTH_HOW_MASK) == AUTH_HOW_MUTUAL) ?
+			"MUTUAL" : "ONE-WAY");
+
+		auth_printsub(&pointer[1], length - 1, buf, sizeof(buf));
+		fprintf(NetTrace, "%s", buf);
+		break;
+
+	    case TELQUAL_SEND:
+		i = 2;
+		fprintf(NetTrace, " SEND ");
+		while (i < length) {
+		    if (AUTHTYPE_NAME_OK(pointer[i]))
+			fprintf(NetTrace, "%s ", AUTHTYPE_NAME(pointer[i]));
+		    else
+			fprintf(NetTrace, "%d ", pointer[i]);
+		    if (++i >= length) {
+			fprintf(NetTrace, "(partial suboption??\?)");
+			break;
+		    }
+		    fprintf(NetTrace, "%s|%s ",
+			((pointer[i] & AUTH_WHO_MASK) == AUTH_WHO_CLIENT) ?
+							"CLIENT" : "SERVER",
+			((pointer[i] & AUTH_HOW_MASK) == AUTH_HOW_MUTUAL) ?
+							"MUTUAL" : "ONE-WAY");
+		    ++i;
+		}
+		break;
+
+	    case TELQUAL_NAME:
+		i = 2;
+		fprintf(NetTrace, " NAME \"");
+		while (i < length)
+		    putc(pointer[i++], NetTrace);
+		putc('"', NetTrace);
+		break;
+
+	    default:
+		    for (i = 2; i < length; i++)
+			fprintf(NetTrace, " ?%d?", pointer[i]);
+		    break;
+	    }
+	    break;
+#endif
+
+#ifdef	ENCRYPTION
+	case TELOPT_ENCRYPT:
+	    fprintf(NetTrace, "ENCRYPT");
+	    if (length < 2) {
+		fprintf(NetTrace, " (empty suboption??\?)");
+		break;
+	    }
+	    switch (pointer[1]) {
+	    case ENCRYPT_START:
+		fprintf(NetTrace, " START");
+		break;
+
+	    case ENCRYPT_END:
+		fprintf(NetTrace, " END");
+		break;
+
+	    case ENCRYPT_REQSTART:
+		fprintf(NetTrace, " REQUEST-START");
+		break;
+
+	    case ENCRYPT_REQEND:
+		fprintf(NetTrace, " REQUEST-END");
+		break;
+
+	    case ENCRYPT_IS:
+	    case ENCRYPT_REPLY:
+		fprintf(NetTrace, " %s ", (pointer[1] == ENCRYPT_IS) ?
+							"IS" : "REPLY");
+		if (length < 3) {
+		    fprintf(NetTrace, " (partial suboption??\?)");
+		    break;
+		}
+		if (ENCTYPE_NAME_OK(pointer[2]))
+		    fprintf(NetTrace, "%s ", ENCTYPE_NAME(pointer[2]));
+		else
+		    fprintf(NetTrace, " %d (unknown)", pointer[2]);
+
+		encrypt_printsub(&pointer[1], length - 1, buf, sizeof(buf));
+		fprintf(NetTrace, "%s", buf);
+		break;
+
+	    case ENCRYPT_SUPPORT:
+		i = 2;
+		fprintf(NetTrace, " SUPPORT ");
+		while (i < length) {
+		    if (ENCTYPE_NAME_OK(pointer[i]))
+			fprintf(NetTrace, "%s ", ENCTYPE_NAME(pointer[i]));
+		    else
+			fprintf(NetTrace, "%d ", pointer[i]);
+		    i++;
+		}
+		break;
+
+	    case ENCRYPT_ENC_KEYID:
+		fprintf(NetTrace, " ENC_KEYID ");
+		goto encommon;
+
+	    case ENCRYPT_DEC_KEYID:
+		fprintf(NetTrace, " DEC_KEYID ");
+		goto encommon;
+
+	    default:
+		fprintf(NetTrace, " %d (unknown)", pointer[1]);
+	    encommon:
+		for (i = 2; i < length; i++)
+		    fprintf(NetTrace, " %d", pointer[i]);
+		break;
+	    }
+	    break;
+#endif	/* ENCRYPTION */
+
+	case TELOPT_LINEMODE:
+	    fprintf(NetTrace, "LINEMODE ");
+	    if (length < 2) {
+		fprintf(NetTrace, " (empty suboption??\?)");
+		break;
+	    }
+	    switch (pointer[1]) {
+	    case WILL:
+		fprintf(NetTrace, "WILL ");
+		goto common;
+	    case WONT:
+		fprintf(NetTrace, "WONT ");
+		goto common;
+	    case DO:
+		fprintf(NetTrace, "DO ");
+		goto common;
+	    case DONT:
+		fprintf(NetTrace, "DONT ");
+	    common:
+		if (length < 3) {
+		    fprintf(NetTrace, "(no option??\?)");
+		    break;
+		}
+		switch (pointer[2]) {
+		case LM_FORWARDMASK:
+		    fprintf(NetTrace, "Forward Mask");
+		    for (i = 3; i < length; i++)
+			fprintf(NetTrace, " %x", pointer[i]);
+		    break;
+		default:
+		    fprintf(NetTrace, "%d (unknown)", pointer[2]);
+		    for (i = 3; i < length; i++)
+			fprintf(NetTrace, " %d", pointer[i]);
+		    break;
+		}
+		break;
+
+	    case LM_SLC:
+		fprintf(NetTrace, "SLC");
+		for (i = 2; i < length - 2; i += 3) {
+		    if (SLC_NAME_OK(pointer[i+SLC_FUNC]))
+			fprintf(NetTrace, " %s", SLC_NAME(pointer[i+SLC_FUNC]));
+		    else
+			fprintf(NetTrace, " %d", pointer[i+SLC_FUNC]);
+		    switch (pointer[i+SLC_FLAGS]&SLC_LEVELBITS) {
+		    case SLC_NOSUPPORT:
+			fprintf(NetTrace, " NOSUPPORT"); break;
+		    case SLC_CANTCHANGE:
+			fprintf(NetTrace, " CANTCHANGE"); break;
+		    case SLC_VARIABLE:
+			fprintf(NetTrace, " VARIABLE"); break;
+		    case SLC_DEFAULT:
+			fprintf(NetTrace, " DEFAULT"); break;
+		    }
+		    fprintf(NetTrace, "%s%s%s",
+			pointer[i+SLC_FLAGS]&SLC_ACK ? "|ACK" : "",
+			pointer[i+SLC_FLAGS]&SLC_FLUSHIN ? "|FLUSHIN" : "",
+			pointer[i+SLC_FLAGS]&SLC_FLUSHOUT ? "|FLUSHOUT" : "");
+		    if (pointer[i+SLC_FLAGS]& ~(SLC_ACK|SLC_FLUSHIN|
+						SLC_FLUSHOUT| SLC_LEVELBITS))
+			fprintf(NetTrace, "(0x%x)", pointer[i+SLC_FLAGS]);
+		    fprintf(NetTrace, " %d;", pointer[i+SLC_VALUE]);
+		    if ((pointer[i+SLC_VALUE] == IAC) &&
+			(pointer[i+SLC_VALUE+1] == IAC))
+				i++;
+		}
+		for (; i < length; i++)
+		    fprintf(NetTrace, " ?%d?", pointer[i]);
+		break;
+
+	    case LM_MODE:
+		fprintf(NetTrace, "MODE ");
+		if (length < 3) {
+		    fprintf(NetTrace, "(no mode??\?)");
+		    break;
+		}
+		{
+		    char tbuf[64];
+		    sprintf(tbuf, "%s%s%s%s%s",
+			pointer[2]&MODE_EDIT ? "|EDIT" : "",
+			pointer[2]&MODE_TRAPSIG ? "|TRAPSIG" : "",
+			pointer[2]&MODE_SOFT_TAB ? "|SOFT_TAB" : "",
+			pointer[2]&MODE_LIT_ECHO ? "|LIT_ECHO" : "",
+			pointer[2]&MODE_ACK ? "|ACK" : "");
+		    fprintf(NetTrace, "%s", tbuf[1] ? &tbuf[1] : "0");
+		}
+		if (pointer[2]&~(MODE_MASK))
+		    fprintf(NetTrace, " (0x%x)", pointer[2]);
+		for (i = 3; i < length; i++)
+		    fprintf(NetTrace, " ?0x%x?", pointer[i]);
+		break;
+	    default:
+		fprintf(NetTrace, "%d (unknown)", pointer[1]);
+		for (i = 2; i < length; i++)
+		    fprintf(NetTrace, " %d", pointer[i]);
+	    }
+	    break;
+
+	case TELOPT_STATUS: {
+	    register char *cp;
+	    register int j, k;
+
+	    fprintf(NetTrace, "STATUS");
+
+	    switch (pointer[1]) {
+	    default:
+		if (pointer[1] == TELQUAL_SEND)
+		    fprintf(NetTrace, " SEND");
+		else
+		    fprintf(NetTrace, " %d (unknown)", pointer[1]);
+		for (i = 2; i < length; i++)
+		    fprintf(NetTrace, " ?%d?", pointer[i]);
+		break;
+	    case TELQUAL_IS:
+		if (--want_status_response < 0)
+		    want_status_response = 0;
+		if (NetTrace == stdout)
+		    fprintf(NetTrace, " IS\r\n");
+		else
+		    fprintf(NetTrace, " IS\n");
+
+		for (i = 2; i < length; i++) {
+		    switch(pointer[i]) {
+		    case DO:	cp = "DO"; goto common2;
+		    case DONT:	cp = "DONT"; goto common2;
+		    case WILL:	cp = "WILL"; goto common2;
+		    case WONT:	cp = "WONT"; goto common2;
+		    common2:
+			i++;
+			if (TELOPT_OK((int)pointer[i]))
+			    fprintf(NetTrace, " %s %s", cp, TELOPT(pointer[i]));
+			else
+			    fprintf(NetTrace, " %s %d", cp, pointer[i]);
+
+			if (NetTrace == stdout)
+			    fprintf(NetTrace, "\r\n");
+			else
+			    fprintf(NetTrace, "\n");
+			break;
+
+		    case SB:
+			fprintf(NetTrace, " SB ");
+			i++;
+			j = k = i;
+			while (j < length) {
+			    if (pointer[j] == SE) {
+				if (j+1 == length)
+				    break;
+				if (pointer[j+1] == SE)
+				    j++;
+				else
+				    break;
+			    }
+			    pointer[k++] = pointer[j++];
+			}
+			printsub(0, &pointer[i], k - i);
+			if (i < length) {
+			    fprintf(NetTrace, " SE");
+			    i = j;
+			} else
+			    i = j - 1;
+
+			if (NetTrace == stdout)
+			    fprintf(NetTrace, "\r\n");
+			else
+			    fprintf(NetTrace, "\n");
+
+			break;
+
+		    default:
+			fprintf(NetTrace, " %d", pointer[i]);
+			break;
+		    }
+		}
+		break;
+	    }
+	    break;
+	  }
+
+	case TELOPT_XDISPLOC:
+	    fprintf(NetTrace, "X-DISPLAY-LOCATION ");
+	    switch (pointer[1]) {
+	    case TELQUAL_IS:
+		fprintf(NetTrace, "IS \"%.*s\"", length-2, (char *)pointer+2);
+		break;
+	    case TELQUAL_SEND:
+		fprintf(NetTrace, "SEND");
+		break;
+	    default:
+		fprintf(NetTrace, "- unknown qualifier %d (0x%x).",
+				pointer[1], pointer[1]);
+	    }
+	    break;
+
+	case TELOPT_NEW_ENVIRON:
+	    fprintf(NetTrace, "NEW-ENVIRON ");
+#ifdef	OLD_ENVIRON
+	    goto env_common1;
+	case TELOPT_OLD_ENVIRON:
+	    fprintf(NetTrace, "OLD-ENVIRON");
+	env_common1:
+#endif
+	    switch (pointer[1]) {
+	    case TELQUAL_IS:
+		fprintf(NetTrace, "IS ");
+		goto env_common;
+	    case TELQUAL_SEND:
+		fprintf(NetTrace, "SEND ");
+		goto env_common;
+	    case TELQUAL_INFO:
+		fprintf(NetTrace, "INFO ");
+	    env_common:
+		{
+		    register int noquote = 2;
+#if defined(ENV_HACK) && defined(OLD_ENVIRON)
+		    extern int old_env_var, old_env_value;
+#endif
+		    for (i = 2; i < length; i++ ) {
+			switch (pointer[i]) {
+			case NEW_ENV_VALUE:
+#ifdef OLD_ENVIRON
+		     /*	case NEW_ENV_OVAR: */
+			    if (pointer[0] == TELOPT_OLD_ENVIRON) {
+# ifdef	ENV_HACK
+				if (old_env_var == OLD_ENV_VALUE)
+				    fprintf(NetTrace, "\" (VALUE) " + noquote);
+				else
+# endif
+				    fprintf(NetTrace, "\" VAR " + noquote);
+			    } else
+#endif /* OLD_ENVIRON */
+				fprintf(NetTrace, "\" VALUE " + noquote);
+			    noquote = 2;
+			    break;
+
+			case NEW_ENV_VAR:
+#ifdef OLD_ENVIRON
+		     /* case OLD_ENV_VALUE: */
+			    if (pointer[0] == TELOPT_OLD_ENVIRON) {
+# ifdef	ENV_HACK
+				if (old_env_value == OLD_ENV_VAR)
+				    fprintf(NetTrace, "\" (VAR) " + noquote);
+				else
+# endif
+				    fprintf(NetTrace, "\" VALUE " + noquote);
+			    } else
+#endif /* OLD_ENVIRON */
+				fprintf(NetTrace, "\" VAR " + noquote);
+			    noquote = 2;
+			    break;
+
+			case ENV_ESC:
+			    fprintf(NetTrace, "\" ESC " + noquote);
+			    noquote = 2;
+			    break;
+
+			case ENV_USERVAR:
+			    fprintf(NetTrace, "\" USERVAR " + noquote);
+			    noquote = 2;
+			    break;
+
+			default:
+			def_case:
+			    if (isprint(pointer[i]) && pointer[i] != '"') {
+				if (noquote) {
+				    putc('"', NetTrace);
+				    noquote = 0;
+				}
+				putc(pointer[i], NetTrace);
+			    } else {
+				fprintf(NetTrace, "\" %03o " + noquote,
+							pointer[i]);
+				noquote = 2;
+			    }
+			    break;
+			}
+		    }
+		    if (!noquote)
+			putc('"', NetTrace);
+		    break;
+		}
+	    }
+	    break;
+
+	default:
+	    if (TELOPT_OK(pointer[0]))
+		fprintf(NetTrace, "%s (unknown)", TELOPT(pointer[0]));
+	    else
+		fprintf(NetTrace, "%d (unknown)", pointer[0]);
+	    for (i = 1; i < length; i++)
+		fprintf(NetTrace, " %d", pointer[i]);
+	    break;
+	}
+	if (direction) {
+	    if (NetTrace == stdout)
+		fprintf(NetTrace, "\r\n");
+	    else
+		fprintf(NetTrace, "\n");
+	}
+	if (NetTrace == stdout)
+	    fflush(NetTrace);
+    }
+}
+
+/* EmptyTerminal - called to make sure that the terminal buffer is empty.
+ *			Note that we consider the buffer to run all the
+ *			way to the kernel (thus the select).
+ */
+
+    void
+EmptyTerminal()
+{
+#if	defined(unix)
+    fd_set	o;
+
+    FD_ZERO(&o);
+#endif	/* defined(unix) */
+
+    if (TTYBYTES() == 0) {
+#if	defined(unix)
+	FD_SET(tout, &o);
+	(void) select(tout+1, (fd_set *) 0, &o, (fd_set *) 0,
+			(struct timeval *) 0);	/* wait for TTLOWAT */
+#endif	/* defined(unix) */
+    } else {
+	while (TTYBYTES()) {
+	    (void) ttyflush(0);
+#if	defined(unix)
+	    FD_SET(tout, &o);
+	    (void) select(tout+1, (fd_set *) 0, &o, (fd_set *) 0,
+				(struct timeval *) 0);	/* wait for TTLOWAT */
+#endif	/* defined(unix) */
+	}
+    }
+}
+
+    void
+SetForExit()
+{
+    setconnmode(0);
+#if	defined(TN3270)
+    if (In3270) {
+	Finish3270();
+    }
+#else	/* defined(TN3270) */
+    do {
+	(void)telrcv();			/* Process any incoming data */
+	EmptyTerminal();
+    } while (ring_full_count(&netiring));	/* While there is any */
+#endif	/* defined(TN3270) */
+    setcommandmode();
+    fflush(stdout);
+    fflush(stderr);
+#if	defined(TN3270)
+    if (In3270) {
+	StopScreen(1);
+    }
+#endif	/* defined(TN3270) */
+    setconnmode(0);
+    EmptyTerminal();			/* Flush the path to the tty */
+    setcommandmode();
+}
+
+    void
+Exit(returnCode)
+    int returnCode;
+{
+    SetForExit();
+    exit(returnCode);
+}
+
+    void
+ExitString(string, returnCode)
+    char *string;
+    int returnCode;
+{
+    SetForExit();
+    fwrite(string, 1, strlen(string), stderr);
+    exit(returnCode);
+}
diff --git a/contrib/telnet/telnetd/authenc.c b/contrib/telnet/telnetd/authenc.c
new file mode 100644
index 0000000..ccb463c
--- /dev/null
+++ b/contrib/telnet/telnetd/authenc.c
@@ -0,0 +1,91 @@
+/*-
+ * Copyright (c) 1991, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef lint
+static char sccsid[] = "@(#)authenc.c	8.2 (Berkeley) 5/30/95";
+#endif /* not lint */
+
+#if	defined(AUTHENTICATION) || defined(ENCRYPTION)
+#include "telnetd.h"
+#include <libtelnet/misc.h>
+
+	int
+net_write(str, len)
+	unsigned char *str;
+	int len;
+{
+	if (nfrontp + len < netobuf + BUFSIZ) {
+		memmove((void *)nfrontp, (void *)str, len);
+		nfrontp += len;
+		return(len);
+	}
+	return(0);
+}
+
+	void
+net_encrypt()
+{
+#ifdef	ENCRYPTION
+	char *s = (nclearto > nbackp) ? nclearto : nbackp;
+	if (s < nfrontp && encrypt_output) {
+		(*encrypt_output)((unsigned char *)s, nfrontp - s);
+	}
+	nclearto = nfrontp;
+#endif /* ENCRYPTION */
+}
+
+	int
+telnet_spin()
+{
+	ttloop();
+	return(0);
+}
+
+	char *
+telnet_getenv(val)
+	char *val;
+{
+	extern char *getenv();
+	return(getenv(val));
+}
+
+	char *
+telnet_gets(prompt, result, length, echo)
+	char *prompt;
+	char *result;
+	int length;
+	int echo;
+{
+	return((char *)0);
+}
+#endif	/* defined(AUTHENTICATION) || defined(ENCRYPTION) */
diff --git a/contrib/telnet/telnetd/defs.h b/contrib/telnet/telnetd/defs.h
new file mode 100644
index 0000000..a73d4a6
--- /dev/null
+++ b/contrib/telnet/telnetd/defs.h
@@ -0,0 +1,296 @@
+/*
+ * Copyright (c) 1989, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *	@(#)defs.h	8.1 (Berkeley) 6/4/93
+ */
+
+/*
+ * Telnet server defines
+ */
+#include <sys/types.h>
+#include <sys/param.h>
+
+#ifndef	BSD
+# define	BSD 43
+#endif
+
+#if	defined(CRAY) && !defined(LINEMODE)
+# define SYSV_TERMIO
+# define LINEMODE
+# define KLUDGELINEMODE
+# define DIAGNOSTICS
+# if defined(UNICOS50) && !defined(UNICOS5)
+#  define UNICOS5
+# endif
+# if !defined(UNICOS5)
+#  define BFTPDAEMON
+#  define HAS_IP_TOS
+# endif
+#endif /* CRAY */
+#if defined(UNICOS5) && !defined(NO_SETSID)
+# define NO_SETSID
+#endif
+
+#if defined(PRINTOPTIONS) && defined(DIAGNOSTICS)
+#define TELOPTS
+#define TELCMDS
+#define	SLC_NAMES
+#endif
+
+#if	defined(SYSV_TERMIO) && !defined(USE_TERMIO)
+# define	USE_TERMIO
+#endif
+
+#include <sys/socket.h>
+#ifndef	CRAY
+#include <sys/wait.h>
+#endif	/* CRAY */
+#include <fcntl.h>
+#include <sys/file.h>
+#include <sys/stat.h>
+#include <sys/time.h>
+#ifndef	FILIO_H
+#include <sys/ioctl.h>
+#else
+#include <sys/filio.h>
+#endif
+
+#include <netinet/in.h>
+
+#include <arpa/telnet.h>
+
+#include <stdio.h>
+#ifdef	__STDC__
+#include <stdlib.h>
+#endif
+#include <signal.h>
+#include <errno.h>
+#include <netdb.h>
+#include <syslog.h>
+#ifndef	LOG_DAEMON
+#define	LOG_DAEMON	0
+#endif
+#ifndef	LOG_ODELAY
+#define	LOG_ODELAY	0
+#endif
+#include <ctype.h>
+#ifndef NO_STRING_H
+#include <string.h>
+#else
+#include <strings.h>
+#endif
+
+#ifndef	USE_TERMIO
+#include <sgtty.h>
+#else
+# ifdef	SYSV_TERMIO
+# include <termio.h>
+# else
+# include <termios.h>
+# endif
+#endif
+#if !defined(USE_TERMIO) || defined(NO_CC_T)
+typedef unsigned char cc_t;
+#endif
+
+#ifdef	__STDC__
+#include <unistd.h>
+#endif
+
+#ifndef _POSIX_VDISABLE
+# ifdef VDISABLE
+#  define _POSIX_VDISABLE VDISABLE
+# else
+#  define _POSIX_VDISABLE ((unsigned char)'\377')
+# endif
+#endif
+
+
+#ifdef	CRAY
+# ifdef	CRAY1
+# include <sys/pty.h>
+#  ifndef FD_ZERO
+# include <sys/select.h>
+#  endif /* FD_ZERO */
+# endif	/* CRAY1 */
+
+#include <memory.h>
+#endif	/* CRAY */
+
+#ifdef __hpux
+#include <sys/ptyio.h>
+#endif
+
+#if	!defined(TIOCSCTTY) && defined(TCSETCTTY)
+# define	TIOCSCTTY TCSETCTTY
+#endif
+
+#ifndef	FD_SET
+#ifndef	HAVE_fd_set
+typedef struct fd_set { int fds_bits[1]; } fd_set;
+#endif
+
+#define	FD_SET(n, p)	((p)->fds_bits[0] |= (1<<(n)))
+#define	FD_CLR(n, p)	((p)->fds_bits[0] &= ~(1<<(n)))
+#define	FD_ISSET(n, p)	((p)->fds_bits[0] & (1<<(n)))
+#define FD_ZERO(p)	((p)->fds_bits[0] = 0)
+#endif	/* FD_SET */
+
+/*
+ * I/O data buffers defines
+ */
+#define	NETSLOP	64
+#ifdef CRAY
+#undef BUFSIZ
+#define BUFSIZ  2048
+#endif
+
+#define	NIACCUM(c)	{   *netip++ = c; \
+			    ncc++; \
+			}
+
+/* clock manipulations */
+#define	settimer(x)	(clocks.x = ++clocks.system)
+#define	sequenceIs(x,y)	(clocks.x < clocks.y)
+
+/*
+ * Linemode support states, in decreasing order of importance
+ */
+#define REAL_LINEMODE	0x04
+#define KLUDGE_OK	0x03
+#define	NO_AUTOKLUDGE	0x02
+#define KLUDGE_LINEMODE	0x01
+#define NO_LINEMODE	0x00
+
+/*
+ * Structures of information for each special character function.
+ */
+typedef struct {
+	unsigned char	flag;		/* the flags for this function */
+	cc_t		val;		/* the value of the special character */
+} slcent, *Slcent;
+
+typedef struct {
+	slcent		defset;		/* the default settings */
+	slcent		current;	/* the current settings */
+	cc_t		*sptr;		/* a pointer to the char in */
+					/* system data structures */
+} slcfun, *Slcfun;
+
+#ifdef DIAGNOSTICS
+/*
+ * Diagnostics capabilities
+ */
+#define	TD_REPORT	0x01	/* Report operations to client */
+#define TD_EXERCISE	0x02	/* Exercise client's implementation */
+#define TD_NETDATA	0x04	/* Display received data stream */
+#define TD_PTYDATA	0x08	/* Display data passed to pty */
+#define	TD_OPTIONS	0x10	/* Report just telnet options */
+#endif /* DIAGNOSTICS */
+
+/*
+ * We keep track of each side of the option negotiation.
+ */
+
+#define	MY_STATE_WILL		0x01
+#define	MY_WANT_STATE_WILL	0x02
+#define	MY_STATE_DO		0x04
+#define	MY_WANT_STATE_DO	0x08
+
+/*
+ * Macros to check the current state of things
+ */
+
+#define	my_state_is_do(opt)		(options[opt]&MY_STATE_DO)
+#define	my_state_is_will(opt)		(options[opt]&MY_STATE_WILL)
+#define my_want_state_is_do(opt)	(options[opt]&MY_WANT_STATE_DO)
+#define my_want_state_is_will(opt)	(options[opt]&MY_WANT_STATE_WILL)
+
+#define	my_state_is_dont(opt)		(!my_state_is_do(opt))
+#define	my_state_is_wont(opt)		(!my_state_is_will(opt))
+#define my_want_state_is_dont(opt)	(!my_want_state_is_do(opt))
+#define my_want_state_is_wont(opt)	(!my_want_state_is_will(opt))
+
+#define	set_my_state_do(opt)		(options[opt] |= MY_STATE_DO)
+#define	set_my_state_will(opt)		(options[opt] |= MY_STATE_WILL)
+#define	set_my_want_state_do(opt)	(options[opt] |= MY_WANT_STATE_DO)
+#define	set_my_want_state_will(opt)	(options[opt] |= MY_WANT_STATE_WILL)
+
+#define	set_my_state_dont(opt)		(options[opt] &= ~MY_STATE_DO)
+#define	set_my_state_wont(opt)		(options[opt] &= ~MY_STATE_WILL)
+#define	set_my_want_state_dont(opt)	(options[opt] &= ~MY_WANT_STATE_DO)
+#define	set_my_want_state_wont(opt)	(options[opt] &= ~MY_WANT_STATE_WILL)
+
+/*
+ * Tricky code here.  What we want to know is if the MY_STATE_WILL
+ * and MY_WANT_STATE_WILL bits have the same value.  Since the two
+ * bits are adjacent, a little arithmatic will show that by adding
+ * in the lower bit, the upper bit will be set if the two bits were
+ * different, and clear if they were the same.
+ */
+#define my_will_wont_is_changing(opt) \
+			((options[opt]+MY_STATE_WILL) & MY_WANT_STATE_WILL)
+
+#define my_do_dont_is_changing(opt) \
+			((options[opt]+MY_STATE_DO) & MY_WANT_STATE_DO)
+
+/*
+ * Make everything symetrical
+ */
+
+#define	HIS_STATE_WILL			MY_STATE_DO
+#define	HIS_WANT_STATE_WILL		MY_WANT_STATE_DO
+#define HIS_STATE_DO			MY_STATE_WILL
+#define HIS_WANT_STATE_DO		MY_WANT_STATE_WILL
+
+#define	his_state_is_do			my_state_is_will
+#define	his_state_is_will		my_state_is_do
+#define his_want_state_is_do		my_want_state_is_will
+#define his_want_state_is_will		my_want_state_is_do
+
+#define	his_state_is_dont		my_state_is_wont
+#define	his_state_is_wont		my_state_is_dont
+#define his_want_state_is_dont		my_want_state_is_wont
+#define his_want_state_is_wont		my_want_state_is_dont
+
+#define	set_his_state_do		set_my_state_will
+#define	set_his_state_will		set_my_state_do
+#define	set_his_want_state_do		set_my_want_state_will
+#define	set_his_want_state_will		set_my_want_state_do
+
+#define	set_his_state_dont		set_my_state_wont
+#define	set_his_state_wont		set_my_state_dont
+#define	set_his_want_state_dont		set_my_want_state_wont
+#define	set_his_want_state_wont		set_my_want_state_dont
+
+#define his_will_wont_is_changing	my_do_dont_is_changing
+#define his_do_dont_is_changing		my_will_wont_is_changing
diff --git a/contrib/telnet/telnetd/ext.h b/contrib/telnet/telnetd/ext.h
new file mode 100644
index 0000000..19bc0d6
--- /dev/null
+++ b/contrib/telnet/telnetd/ext.h
@@ -0,0 +1,240 @@
+/*
+ * Copyright (c) 1989, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *	@(#)ext.h	8.2 (Berkeley) 12/15/93
+ */
+
+/*
+ * Telnet server variable declarations
+ */
+extern char	options[256];
+extern char	do_dont_resp[256];
+extern char	will_wont_resp[256];
+extern int	linemode;	/* linemode on/off */
+#ifdef	LINEMODE
+extern int	uselinemode;	/* what linemode to use (on/off) */
+extern int	editmode;	/* edit modes in use */
+extern int	useeditmode;	/* edit modes to use */
+extern int	alwayslinemode;	/* command line option */
+# ifdef	KLUDGELINEMODE
+extern int	lmodetype;	/* Client support for linemode */
+# endif	/* KLUDGELINEMODE */
+#endif	/* LINEMODE */
+extern int	flowmode;	/* current flow control state */
+extern int	restartany;	/* restart output on any character state */
+#ifdef DIAGNOSTICS
+extern int	diagnostic;	/* telnet diagnostic capabilities */
+#endif /* DIAGNOSTICS */
+#ifdef BFTPDAEMON
+extern int	bftpd;		/* behave as bftp daemon */
+#endif /* BFTPDAEMON */
+#if	defined(SecurID)
+extern int	require_SecurID;
+#endif
+#if	defined(AUTHENTICATION)
+extern int	auth_level;
+#endif
+
+extern slcfun	slctab[NSLC + 1];	/* slc mapping table */
+
+char	*terminaltype;
+
+/*
+ * I/O data buffers, pointers, and counters.
+ */
+extern char	ptyobuf[BUFSIZ+NETSLOP], *pfrontp, *pbackp;
+
+extern char	netibuf[BUFSIZ], *netip;
+
+extern char	netobuf[BUFSIZ+NETSLOP], *nfrontp, *nbackp;
+extern char	*neturg;		/* one past last bye of urgent data */
+
+extern int	pcc, ncc;
+
+#if defined(CRAY2) && defined(UNICOS5)
+extern int unpcc;  /* characters left unprocessed by CRAY-2 terminal routine */
+extern char *unptyip;  /* pointer to remaining characters in buffer */
+#endif
+
+extern int	pty, net;
+extern char	*line;
+extern int	SYNCHing;		/* we are in TELNET SYNCH mode */
+
+#ifndef	P
+# ifdef	__STDC__
+#  define P(x)	x
+# else
+#  define P(x)	()
+# endif
+#endif
+
+extern void
+	_termstat P((void)),
+	add_slc P((int, int, int)),
+	check_slc P((void)),
+	change_slc P((int, int, int)),
+	cleanup P((int)),
+	clientstat P((int, int, int)),
+	copy_termbuf P((char *, int)),
+	deferslc P((void)),
+	defer_terminit P((void)),
+	do_opt_slc P((unsigned char *, int)),
+	doeof P((void)),
+	dooption P((int)),
+	dontoption P((int)),
+	edithost P((char *, char *)),
+	fatal P((int, char *)),
+	fatalperror P((int, char *)),
+	get_slc_defaults P((void)),
+	init_env P((void)),
+	init_termbuf P((void)),
+	interrupt P((void)),
+	localstat P((void)),
+	flowstat P((void)),
+	netclear P((void)),
+	netflush P((void)),
+#ifdef DIAGNOSTICS
+	printoption P((char *, int)),
+	printdata P((char *, char *, int)),
+	printsub P((int, unsigned char *, int)),
+#endif
+	ptyflush P((void)),
+	putchr P((int)),
+	putf P((char *, char *)),
+	recv_ayt P((void)),
+	send_do P((int, int)),
+	send_dont P((int, int)),
+	send_slc P((void)),
+	send_status P((void)),
+	send_will P((int, int)),
+	send_wont P((int, int)),
+	sendbrk P((void)),
+	sendsusp P((void)),
+	set_termbuf P((void)),
+	start_login P((char *, int, char *)),
+	start_slc P((int)),
+#if	defined(AUTHENTICATION)
+	start_slave P((char *)),
+#else
+	start_slave P((char *, int, char *)),
+#endif
+	suboption P((void)),
+	telrcv P((void)),
+	ttloop P((void)),
+	tty_binaryin P((int)),
+	tty_binaryout P((int));
+
+extern int
+	end_slc P((unsigned char **)),
+	getnpty P((void)),
+#ifndef convex
+	getpty P((int *)),
+#endif
+	login_tty P((int)),
+	spcset P((int, cc_t *, cc_t **)),
+	stilloob P((int)),
+	terminit P((void)),
+	termstat P((void)),
+	tty_flowmode P((void)),
+	tty_restartany P((void)),
+	tty_isbinaryin P((void)),
+	tty_isbinaryout P((void)),
+	tty_iscrnl P((void)),
+	tty_isecho P((void)),
+	tty_isediting P((void)),
+	tty_islitecho P((void)),
+	tty_isnewmap P((void)),
+	tty_israw P((void)),
+	tty_issofttab P((void)),
+	tty_istrapsig P((void)),
+	tty_linemode P((void));
+
+extern void
+	tty_rspeed P((int)),
+	tty_setecho P((int)),
+	tty_setedit P((int)),
+	tty_setlinemode P((int)),
+	tty_setlitecho P((int)),
+	tty_setsig P((int)),
+	tty_setsofttab P((int)),
+	tty_tspeed P((int)),
+	willoption P((int)),
+	wontoption P((int)),
+	writenet P((unsigned char *, int));
+
+#ifdef	ENCRYPTION
+extern void	(*encrypt_output) P((unsigned char *, int));
+extern int	(*decrypt_input) P((int));
+extern char	*nclearto;
+#endif	/* ENCRYPTION */
+
+
+/*
+ * The following are some clocks used to decide how to interpret
+ * the relationship between various variables.
+ */
+
+extern struct {
+    int
+	system,			/* what the current time is */
+	echotoggle,		/* last time user entered echo character */
+	modenegotiated,		/* last time operating mode negotiated */
+	didnetreceive,		/* last time we read data from network */
+	ttypesubopt,		/* ttype subopt is received */
+	tspeedsubopt,		/* tspeed subopt is received */
+	environsubopt,		/* environ subopt is received */
+	oenvironsubopt,		/* old environ subopt is received */
+	xdisplocsubopt,		/* xdisploc subopt is received */
+	baseline,		/* time started to do timed action */
+	gotDM;			/* when did we last see a data mark */
+} clocks;
+
+
+#if	defined(CRAY2) && defined(UNICOS5)
+extern int	needtermstat;
+#endif
+
+#ifndef	DEFAULT_IM
+# ifdef CRAY
+#  define DEFAULT_IM	"\r\n\r\nCray UNICOS (%h) (%t)\r\n\r\r\n\r"
+# else
+#  ifdef sun
+#   define DEFAULT_IM	"\r\n\r\nSunOS UNIX (%h) (%t)\r\n\r\r\n\r"
+#  else
+#   ifdef ultrix
+#    define DEFAULT_IM	"\r\n\r\nULTRIX (%h) (%t)\r\n\r\r\n\r"
+#   else
+#    define DEFAULT_IM	"\r\n\r\n4.4 BSD UNIX (%h) (%t)\r\n\r\r\n\r"
+#   endif
+#  endif
+# endif
+#endif
diff --git a/contrib/telnet/telnetd/global.c b/contrib/telnet/telnetd/global.c
new file mode 100644
index 0000000..af21acc
--- /dev/null
+++ b/contrib/telnet/telnetd/global.c
@@ -0,0 +1,48 @@
+/*
+ * Copyright (c) 1989, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef lint
+static char sccsid[] = "@(#)global.c	8.1 (Berkeley) 6/4/93";
+#endif /* not lint */
+
+/*
+ * Allocate global variables.  We do this
+ * by including the header file that defines
+ * them all as externs, but first we define
+ * the keyword "extern" to be nothing, so that
+ * we will actually allocate the space.
+ */
+
+#include "defs.h"
+#define extern
+#include "ext.h"
diff --git a/contrib/telnet/telnetd/pathnames.h b/contrib/telnet/telnetd/pathnames.h
new file mode 100644
index 0000000..c8b0806
--- /dev/null
+++ b/contrib/telnet/telnetd/pathnames.h
@@ -0,0 +1,55 @@
+/*
+ * Copyright (c) 1989, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *	@(#)pathnames.h	8.1 (Berkeley) 6/4/93
+ */
+
+#if BSD > 43
+
+# include <paths.h>
+
+# ifndef _PATH_LOGIN
+#  define	_PATH_LOGIN	"/usr/bin/login"
+# endif
+
+#else
+ 
+# define	_PATH_TTY	"/dev/tty"
+# ifndef _PATH_LOGIN
+#  define	_PATH_LOGIN	"/bin/login"
+# endif
+
+#endif
+
+#ifdef BFTPDAEMON
+#define		BFTPPATH	"/usr/ucb/bftp"
+#endif  /* BFTPDAEMON */
diff --git a/contrib/telnet/telnetd/slc.c b/contrib/telnet/telnetd/slc.c
new file mode 100644
index 0000000..6cbb7ab
--- /dev/null
+++ b/contrib/telnet/telnetd/slc.c
@@ -0,0 +1,491 @@
+/*
+ * Copyright (c) 1989, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef lint
+static char sccsid[] = "@(#)slc.c	8.2 (Berkeley) 5/30/95";
+#endif /* not lint */
+
+#include "telnetd.h"
+
+#ifdef	LINEMODE
+/*
+ * local varibles
+ */
+static unsigned char	*def_slcbuf = (unsigned char *)0;
+static int		def_slclen = 0;
+static int		slcchange;	/* change to slc is requested */
+static unsigned char	*slcptr;	/* pointer into slc buffer */
+static unsigned char	slcbuf[NSLC*6];	/* buffer for slc negotiation */
+
+/*
+ * send_slc
+ *
+ * Write out the current special characters to the client.
+ */
+	void
+send_slc()
+{
+	register int i;
+
+	/*
+	 * Send out list of triplets of special characters
+	 * to client.  We only send info on the characters
+	 * that are currently supported.
+	 */
+	for (i = 1; i <= NSLC; i++) {
+		if ((slctab[i].defset.flag & SLC_LEVELBITS) == SLC_NOSUPPORT)
+			continue;
+		add_slc((unsigned char)i, slctab[i].current.flag,
+							slctab[i].current.val);
+	}
+
+}  /* end of send_slc */
+
+/*
+ * default_slc
+ *
+ * Set pty special characters to all the defaults.
+ */
+	void
+default_slc()
+{
+	register int i;
+
+	for (i = 1; i <= NSLC; i++) {
+		slctab[i].current.val = slctab[i].defset.val;
+		if (slctab[i].current.val == (cc_t)(_POSIX_VDISABLE))
+			slctab[i].current.flag = SLC_NOSUPPORT;
+		else
+			slctab[i].current.flag = slctab[i].defset.flag;
+		if (slctab[i].sptr) {
+			*(slctab[i].sptr) = slctab[i].defset.val;
+		}
+	}
+	slcchange = 1;
+
+}  /* end of default_slc */
+#endif	/* LINEMODE */
+
+/*
+ * get_slc_defaults
+ *
+ * Initialize the slc mapping table.
+ */
+	void
+get_slc_defaults()
+{
+	register int i;
+
+	init_termbuf();
+
+	for (i = 1; i <= NSLC; i++) {
+		slctab[i].defset.flag =
+			spcset(i, &slctab[i].defset.val, &slctab[i].sptr);
+		slctab[i].current.flag = SLC_NOSUPPORT;
+		slctab[i].current.val = 0;
+	}
+
+}  /* end of get_slc_defaults */
+
+#ifdef	LINEMODE
+/*
+ * add_slc
+ *
+ * Add an slc triplet to the slc buffer.
+ */
+	void
+add_slc(func, flag, val)
+	register char func, flag;
+	register cc_t val;
+{
+
+	if ((*slcptr++ = (unsigned char)func) == 0xff)
+		*slcptr++ = 0xff;
+
+	if ((*slcptr++ = (unsigned char)flag) == 0xff)
+		*slcptr++ = 0xff;
+
+	if ((*slcptr++ = (unsigned char)val) == 0xff)
+		*slcptr++ = 0xff;
+
+}  /* end of add_slc */
+
+/*
+ * start_slc
+ *
+ * Get ready to process incoming slc's and respond to them.
+ *
+ * The parameter getit is non-zero if it is necessary to grab a copy
+ * of the terminal control structures.
+ */
+	void
+start_slc(getit)
+	register int getit;
+{
+
+	slcchange = 0;
+	if (getit)
+		init_termbuf();
+	(void) sprintf((char *)slcbuf, "%c%c%c%c",
+					IAC, SB, TELOPT_LINEMODE, LM_SLC);
+	slcptr = slcbuf + 4;
+
+}  /* end of start_slc */
+
+/*
+ * end_slc
+ *
+ * Finish up the slc negotiation.  If something to send, then send it.
+ */
+	int
+end_slc(bufp)
+	register unsigned char **bufp;
+{
+	register int len;
+	void netflush();
+
+	/*
+	 * If a change has occured, store the new terminal control
+	 * structures back to the terminal driver.
+	 */
+	if (slcchange) {
+		set_termbuf();
+	}
+
+	/*
+	 * If the pty state has not yet been fully processed and there is a
+	 * deferred slc request from the client, then do not send any
+	 * sort of slc negotiation now.  We will respond to the client's
+	 * request very soon.
+	 */
+	if (def_slcbuf && (terminit() == 0)) {
+		return(0);
+	}
+
+	if (slcptr > (slcbuf + 4)) {
+		if (bufp) {
+			*bufp = &slcbuf[4];
+			return(slcptr - slcbuf - 4);
+		} else {
+			(void) sprintf((char *)slcptr, "%c%c", IAC, SE);
+			slcptr += 2;
+			len = slcptr - slcbuf;
+			writenet(slcbuf, len);
+			netflush();  /* force it out immediately */
+			DIAG(TD_OPTIONS, printsub('>', slcbuf+2, len-2););
+		}
+	}
+	return (0);
+
+}  /* end of end_slc */
+
+/*
+ * process_slc
+ *
+ * Figure out what to do about the client's slc
+ */
+	void
+process_slc(func, flag, val)
+	register unsigned char func, flag;
+	register cc_t val;
+{
+	register int hislevel, mylevel, ack;
+
+	/*
+	 * Ensure that we know something about this function
+	 */
+	if (func > NSLC) {
+		add_slc(func, SLC_NOSUPPORT, 0);
+		return;
+	}
+
+	/*
+	 * Process the special case requests of 0 SLC_DEFAULT 0
+	 * and 0 SLC_VARIABLE 0.  Be a little forgiving here, don't
+	 * worry about whether the value is actually 0 or not.
+	 */
+	if (func == 0) {
+		if ((flag = flag & SLC_LEVELBITS) == SLC_DEFAULT) {
+			default_slc();
+			send_slc();
+		} else if (flag == SLC_VARIABLE) {
+			send_slc();
+		}
+		return;
+	}
+
+	/*
+	 * Appears to be a function that we know something about.  So
+	 * get on with it and see what we know.
+	 */
+
+	hislevel = flag & SLC_LEVELBITS;
+	mylevel = slctab[func].current.flag & SLC_LEVELBITS;
+	ack = flag & SLC_ACK;
+	/*
+	 * ignore the command if:
+	 * the function value and level are the same as what we already have;
+	 * or the level is the same and the ack bit is set
+	 */
+	if (hislevel == mylevel && (val == slctab[func].current.val || ack)) {
+		return;
+	} else if (ack) {
+		/*
+		 * If we get here, we got an ack, but the levels don't match.
+		 * This shouldn't happen.  If it does, it is probably because
+		 * we have sent two requests to set a variable without getting
+		 * a response between them, and this is the first response.
+		 * So, ignore it, and wait for the next response.
+		 */
+		return;
+	} else {
+		change_slc(func, flag, val);
+	}
+
+}  /* end of process_slc */
+
+/*
+ * change_slc
+ *
+ * Process a request to change one of our special characters.
+ * Compare client's request with what we are capable of supporting.
+ */
+	void
+change_slc(func, flag, val)
+	register char func, flag;
+	register cc_t val;
+{
+	register int hislevel, mylevel;
+
+	hislevel = flag & SLC_LEVELBITS;
+	mylevel = slctab[func].defset.flag & SLC_LEVELBITS;
+	/*
+	 * If client is setting a function to NOSUPPORT
+	 * or DEFAULT, then we can easily and directly
+	 * accomodate the request.
+	 */
+	if (hislevel == SLC_NOSUPPORT) {
+		slctab[func].current.flag = flag;
+		slctab[func].current.val = (cc_t)_POSIX_VDISABLE;
+		flag |= SLC_ACK;
+		add_slc(func, flag, val);
+		return;
+	}
+	if (hislevel == SLC_DEFAULT) {
+		/*
+		 * Special case here.  If client tells us to use
+		 * the default on a function we don't support, then
+		 * return NOSUPPORT instead of what we may have as a
+		 * default level of DEFAULT.
+		 */
+		if (mylevel == SLC_DEFAULT) {
+			slctab[func].current.flag = SLC_NOSUPPORT;
+		} else {
+			slctab[func].current.flag = slctab[func].defset.flag;
+		}
+		slctab[func].current.val = slctab[func].defset.val;
+		add_slc(func, slctab[func].current.flag,
+						slctab[func].current.val);
+		return;
+	}
+
+	/*
+	 * Client wants us to change to a new value or he
+	 * is telling us that he can't change to our value.
+	 * Some of the slc's we support and can change,
+	 * some we do support but can't change,
+	 * and others we don't support at all.
+	 * If we can change it then we have a pointer to
+	 * the place to put the new value, so change it,
+	 * otherwise, continue the negotiation.
+	 */
+	if (slctab[func].sptr) {
+		/*
+		 * We can change this one.
+		 */
+		slctab[func].current.val = val;
+		*(slctab[func].sptr) = val;
+		slctab[func].current.flag = flag;
+		flag |= SLC_ACK;
+		slcchange = 1;
+		add_slc(func, flag, val);
+	} else {
+		/*
+		* It is not possible for us to support this
+		* request as he asks.
+		*
+		* If our level is DEFAULT, then just ack whatever was
+		* sent.
+		*
+		* If he can't change and we can't change,
+		* then degenerate to NOSUPPORT.
+		*
+		* Otherwise we send our level back to him, (CANTCHANGE
+		* or NOSUPPORT) and if CANTCHANGE, send
+		* our value as well.
+		*/
+		if (mylevel == SLC_DEFAULT) {
+			slctab[func].current.flag = flag;
+			slctab[func].current.val = val;
+			flag |= SLC_ACK;
+		} else if (hislevel == SLC_CANTCHANGE &&
+				    mylevel == SLC_CANTCHANGE) {
+			flag &= ~SLC_LEVELBITS;
+			flag |= SLC_NOSUPPORT;
+			slctab[func].current.flag = flag;
+		} else {
+			flag &= ~SLC_LEVELBITS;
+			flag |= mylevel;
+			slctab[func].current.flag = flag;
+			if (mylevel == SLC_CANTCHANGE) {
+				slctab[func].current.val =
+					slctab[func].defset.val;
+				val = slctab[func].current.val;
+			}
+		}
+		add_slc(func, flag, val);
+	}
+
+}  /* end of change_slc */
+
+#if	defined(USE_TERMIO) && (VEOF == VMIN)
+cc_t oldeofc = '\004';
+#endif
+
+/*
+ * check_slc
+ *
+ * Check the special characters in use and notify the client if any have
+ * changed.  Only those characters that are capable of being changed are
+ * likely to have changed.  If a local change occurs, kick the support level
+ * and flags up to the defaults.
+ */
+	void
+check_slc()
+{
+	register int i;
+
+	for (i = 1; i <= NSLC; i++) {
+#if	defined(USE_TERMIO) && (VEOF == VMIN)
+		/*
+		 * In a perfect world this would be a neat little
+		 * function.  But in this world, we should not notify
+		 * client of changes to the VEOF char when
+		 * ICANON is off, because it is not representing
+		 * a special character.
+		 */
+		if (i == SLC_EOF) {
+			if (!tty_isediting())
+				continue;
+			else if (slctab[i].sptr)
+				oldeofc = *(slctab[i].sptr);
+		}
+#endif	/* defined(USE_TERMIO) && defined(SYSV_TERMIO) */
+		if (slctab[i].sptr &&
+				(*(slctab[i].sptr) != slctab[i].current.val)) {
+			slctab[i].current.val = *(slctab[i].sptr);
+			if (*(slctab[i].sptr) == (cc_t)_POSIX_VDISABLE)
+				slctab[i].current.flag = SLC_NOSUPPORT;
+			else
+				slctab[i].current.flag = slctab[i].defset.flag;
+			add_slc((unsigned char)i, slctab[i].current.flag,
+						slctab[i].current.val);
+		}
+	}
+}  /* check_slc */
+
+/*
+ * do_opt_slc
+ *
+ * Process an slc option buffer.  Defer processing of incoming slc's
+ * until after the terminal state has been processed.  Save the first slc
+ * request that comes along, but discard all others.
+ *
+ * ptr points to the beginning of the buffer, len is the length.
+ */
+	void
+do_opt_slc(ptr, len)
+	register unsigned char *ptr;
+	register int len;
+{
+	register unsigned char func, flag;
+	cc_t val;
+	register unsigned char *end = ptr + len;
+
+	if (terminit()) {  /* go ahead */
+		while (ptr < end) {
+			func = *ptr++;
+			if (ptr >= end) break;
+			flag = *ptr++;
+			if (ptr >= end) break;
+			val = (cc_t)*ptr++;
+
+			process_slc(func, flag, val);
+
+		}
+	} else {
+		/*
+		 * save this slc buffer if it is the first, otherwise dump
+		 * it.
+		 */
+		if (def_slcbuf == (unsigned char *)0) {
+			def_slclen = len;
+			def_slcbuf = (unsigned char *)malloc((unsigned)len);
+			if (def_slcbuf == (unsigned char *)0)
+				return;  /* too bad */
+			memmove(def_slcbuf, ptr, len);
+		}
+	}
+
+}  /* end of do_opt_slc */
+
+/*
+ * deferslc
+ *
+ * Do slc stuff that was deferred.
+ */
+	void
+deferslc()
+{
+	if (def_slcbuf) {
+		start_slc(1);
+		do_opt_slc(def_slcbuf, def_slclen);
+		(void) end_slc(0);
+		free(def_slcbuf);
+		def_slcbuf = (unsigned char *)0;
+		def_slclen = 0;
+	}
+
+}  /* end of deferslc */
+
+#endif	/* LINEMODE */
diff --git a/contrib/telnet/telnetd/state.c b/contrib/telnet/telnetd/state.c
new file mode 100644
index 0000000..4ee8bea
--- /dev/null
+++ b/contrib/telnet/telnetd/state.c
@@ -0,0 +1,1612 @@
+/*
+ * Copyright (c) 1989, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef lint
+static char sccsid[] = "@(#)state.c	8.5 (Berkeley) 5/30/95";
+#endif /* not lint */
+
+#include "telnetd.h"
+#if	defined(AUTHENTICATION)
+#include <libtelnet/auth.h>
+#endif
+
+unsigned char	doopt[] = { IAC, DO, '%', 'c', 0 };
+unsigned char	dont[] = { IAC, DONT, '%', 'c', 0 };
+unsigned char	will[] = { IAC, WILL, '%', 'c', 0 };
+unsigned char	wont[] = { IAC, WONT, '%', 'c', 0 };
+int	not42 = 1;
+
+/*
+ * Buffer for sub-options, and macros
+ * for suboptions buffer manipulations
+ */
+unsigned char subbuffer[512], *subpointer= subbuffer, *subend= subbuffer;
+
+#define	SB_CLEAR()	subpointer = subbuffer
+#define	SB_TERM()	{ subend = subpointer; SB_CLEAR(); }
+#define	SB_ACCUM(c)	if (subpointer < (subbuffer+sizeof subbuffer)) { \
+				*subpointer++ = (c); \
+			}
+#define	SB_GET()	((*subpointer++)&0xff)
+#define	SB_EOF()	(subpointer >= subend)
+#define	SB_LEN()	(subend - subpointer)
+
+#ifdef	ENV_HACK
+unsigned char *subsave;
+#define SB_SAVE()	subsave = subpointer;
+#define	SB_RESTORE()	subpointer = subsave;
+#endif
+
+
+/*
+ * State for recv fsm
+ */
+#define	TS_DATA		0	/* base state */
+#define	TS_IAC		1	/* look for double IAC's */
+#define	TS_CR		2	/* CR-LF ->'s CR */
+#define	TS_SB		3	/* throw away begin's... */
+#define	TS_SE		4	/* ...end's (suboption negotiation) */
+#define	TS_WILL		5	/* will option negotiation */
+#define	TS_WONT		6	/* wont " */
+#define	TS_DO		7	/* do " */
+#define	TS_DONT		8	/* dont " */
+
+	void
+telrcv()
+{
+	register int c;
+	static int state = TS_DATA;
+#if	defined(CRAY2) && defined(UNICOS5)
+	char *opfrontp = pfrontp;
+#endif
+
+	while (ncc > 0) {
+		if ((&ptyobuf[BUFSIZ] - pfrontp) < 2)
+			break;
+		c = *netip++ & 0377, ncc--;
+#ifdef	ENCRYPTION
+		if (decrypt_input)
+			c = (*decrypt_input)(c);
+#endif	/* ENCRYPTION */
+		switch (state) {
+
+		case TS_CR:
+			state = TS_DATA;
+			/* Strip off \n or \0 after a \r */
+			if ((c == 0) || (c == '\n')) {
+				break;
+			}
+			/* FALL THROUGH */
+
+		case TS_DATA:
+			if (c == IAC) {
+				state = TS_IAC;
+				break;
+			}
+			/*
+			 * We now map \r\n ==> \r for pragmatic reasons.
+			 * Many client implementations send \r\n when
+			 * the user hits the CarriageReturn key.
+			 *
+			 * We USED to map \r\n ==> \n, since \r\n says
+			 * that we want to be in column 1 of the next
+			 * printable line, and \n is the standard
+			 * unix way of saying that (\r is only good
+			 * if CRMOD is set, which it normally is).
+			 */
+			if ((c == '\r') && his_state_is_wont(TELOPT_BINARY)) {
+				int nc = *netip;
+#ifdef	ENCRYPTION
+				if (decrypt_input)
+					nc = (*decrypt_input)(nc & 0xff);
+#endif	/* ENCRYPTION */
+#ifdef	LINEMODE
+				/*
+				 * If we are operating in linemode,
+				 * convert to local end-of-line.
+				 */
+				if (linemode && (ncc > 0) && (('\n' == nc) ||
+					 ((0 == nc) && tty_iscrnl())) ) {
+					netip++; ncc--;
+					c = '\n';
+				} else
+#endif
+				{
+#ifdef	ENCRYPTION
+					if (decrypt_input)
+						(void)(*decrypt_input)(-1);
+#endif	/* ENCRYPTION */
+					state = TS_CR;
+				}
+			}
+			*pfrontp++ = c;
+			break;
+
+		case TS_IAC:
+gotiac:			switch (c) {
+
+			/*
+			 * Send the process on the pty side an
+			 * interrupt.  Do this with a NULL or
+			 * interrupt char; depending on the tty mode.
+			 */
+			case IP:
+				DIAG(TD_OPTIONS,
+					printoption("td: recv IAC", c));
+				interrupt();
+				break;
+
+			case BREAK:
+				DIAG(TD_OPTIONS,
+					printoption("td: recv IAC", c));
+				sendbrk();
+				break;
+
+			/*
+			 * Are You There?
+			 */
+			case AYT:
+				DIAG(TD_OPTIONS,
+					printoption("td: recv IAC", c));
+				recv_ayt();
+				break;
+
+			/*
+			 * Abort Output
+			 */
+			case AO:
+			    {
+				DIAG(TD_OPTIONS,
+					printoption("td: recv IAC", c));
+				ptyflush();	/* half-hearted */
+				init_termbuf();
+
+				if (slctab[SLC_AO].sptr &&
+				    *slctab[SLC_AO].sptr != (cc_t)(_POSIX_VDISABLE)) {
+				    *pfrontp++ =
+					(unsigned char)*slctab[SLC_AO].sptr;
+				}
+
+				netclear();	/* clear buffer back */
+				*nfrontp++ = IAC;
+				*nfrontp++ = DM;
+				neturg = nfrontp-1; /* off by one XXX */
+				DIAG(TD_OPTIONS,
+					printoption("td: send IAC", DM));
+				break;
+			    }
+
+			/*
+			 * Erase Character and
+			 * Erase Line
+			 */
+			case EC:
+			case EL:
+			    {
+				cc_t ch;
+
+				DIAG(TD_OPTIONS,
+					printoption("td: recv IAC", c));
+				ptyflush();	/* half-hearted */
+				init_termbuf();
+				if (c == EC)
+					ch = *slctab[SLC_EC].sptr;
+				else
+					ch = *slctab[SLC_EL].sptr;
+				if (ch != (cc_t)(_POSIX_VDISABLE))
+					*pfrontp++ = (unsigned char)ch;
+				break;
+			    }
+
+			/*
+			 * Check for urgent data...
+			 */
+			case DM:
+				DIAG(TD_OPTIONS,
+					printoption("td: recv IAC", c));
+				SYNCHing = stilloob(net);
+				settimer(gotDM);
+				break;
+
+
+			/*
+			 * Begin option subnegotiation...
+			 */
+			case SB:
+				state = TS_SB;
+				SB_CLEAR();
+				continue;
+
+			case WILL:
+				state = TS_WILL;
+				continue;
+
+			case WONT:
+				state = TS_WONT;
+				continue;
+
+			case DO:
+				state = TS_DO;
+				continue;
+
+			case DONT:
+				state = TS_DONT;
+				continue;
+			case EOR:
+				if (his_state_is_will(TELOPT_EOR))
+					doeof();
+				break;
+
+			/*
+			 * Handle RFC 10xx Telnet linemode option additions
+			 * to command stream (EOF, SUSP, ABORT).
+			 */
+			case xEOF:
+				doeof();
+				break;
+
+			case SUSP:
+				sendsusp();
+				break;
+
+			case ABORT:
+				sendbrk();
+				break;
+
+			case IAC:
+				*pfrontp++ = c;
+				break;
+			}
+			state = TS_DATA;
+			break;
+
+		case TS_SB:
+			if (c == IAC) {
+				state = TS_SE;
+			} else {
+				SB_ACCUM(c);
+			}
+			break;
+
+		case TS_SE:
+			if (c != SE) {
+				if (c != IAC) {
+					/*
+					 * bad form of suboption negotiation.
+					 * handle it in such a way as to avoid
+					 * damage to local state.  Parse
+					 * suboption buffer found so far,
+					 * then treat remaining stream as
+					 * another command sequence.
+					 */
+
+					/* for DIAGNOSTICS */
+					SB_ACCUM(IAC);
+					SB_ACCUM(c);
+					subpointer -= 2;
+
+					SB_TERM();
+					suboption();
+					state = TS_IAC;
+					goto gotiac;
+				}
+				SB_ACCUM(c);
+				state = TS_SB;
+			} else {
+				/* for DIAGNOSTICS */
+				SB_ACCUM(IAC);
+				SB_ACCUM(SE);
+				subpointer -= 2;
+
+				SB_TERM();
+				suboption();	/* handle sub-option */
+				state = TS_DATA;
+			}
+			break;
+
+		case TS_WILL:
+			willoption(c);
+			state = TS_DATA;
+			continue;
+
+		case TS_WONT:
+			wontoption(c);
+			state = TS_DATA;
+			continue;
+
+		case TS_DO:
+			dooption(c);
+			state = TS_DATA;
+			continue;
+
+		case TS_DONT:
+			dontoption(c);
+			state = TS_DATA;
+			continue;
+
+		default:
+			syslog(LOG_ERR, "telnetd: panic state=%d\n", state);
+			printf("telnetd: panic state=%d\n", state);
+			exit(1);
+		}
+	}
+#if	defined(CRAY2) && defined(UNICOS5)
+	if (!linemode) {
+		char	xptyobuf[BUFSIZ+NETSLOP];
+		char	xbuf2[BUFSIZ];
+		register char *cp;
+		int n = pfrontp - opfrontp, oc;
+		memmove(xptyobuf, opfrontp, n);
+		pfrontp = opfrontp;
+		pfrontp += term_input(xptyobuf, pfrontp, n, BUFSIZ+NETSLOP,
+					xbuf2, &oc, BUFSIZ);
+		for (cp = xbuf2; oc > 0; --oc)
+			if ((*nfrontp++ = *cp++) == IAC)
+				*nfrontp++ = IAC;
+	}
+#endif	/* defined(CRAY2) && defined(UNICOS5) */
+}  /* end of telrcv */
+
+/*
+ * The will/wont/do/dont state machines are based on Dave Borman's
+ * Telnet option processing state machine.
+ *
+ * These correspond to the following states:
+ *	my_state = the last negotiated state
+ *	want_state = what I want the state to go to
+ *	want_resp = how many requests I have sent
+ * All state defaults are negative, and resp defaults to 0.
+ *
+ * When initiating a request to change state to new_state:
+ *
+ * if ((want_resp == 0 && new_state == my_state) || want_state == new_state) {
+ *	do nothing;
+ * } else {
+ *	want_state = new_state;
+ *	send new_state;
+ *	want_resp++;
+ * }
+ *
+ * When receiving new_state:
+ *
+ * if (want_resp) {
+ *	want_resp--;
+ *	if (want_resp && (new_state == my_state))
+ *		want_resp--;
+ * }
+ * if ((want_resp == 0) && (new_state != want_state)) {
+ *	if (ok_to_switch_to new_state)
+ *		want_state = new_state;
+ *	else
+ *		want_resp++;
+ *	send want_state;
+ * }
+ * my_state = new_state;
+ *
+ * Note that new_state is implied in these functions by the function itself.
+ * will and do imply positive new_state, wont and dont imply negative.
+ *
+ * Finally, there is one catch.  If we send a negative response to a
+ * positive request, my_state will be the positive while want_state will
+ * remain negative.  my_state will revert to negative when the negative
+ * acknowlegment arrives from the peer.  Thus, my_state generally tells
+ * us not only the last negotiated state, but also tells us what the peer
+ * wants to be doing as well.  It is important to understand this difference
+ * as we may wish to be processing data streams based on our desired state
+ * (want_state) or based on what the peer thinks the state is (my_state).
+ *
+ * This all works fine because if the peer sends a positive request, the data
+ * that we receive prior to negative acknowlegment will probably be affected
+ * by the positive state, and we can process it as such (if we can; if we
+ * can't then it really doesn't matter).  If it is that important, then the
+ * peer probably should be buffering until this option state negotiation
+ * is complete.
+ *
+ */
+	void
+send_do(option, init)
+	int option, init;
+{
+	if (init) {
+		if ((do_dont_resp[option] == 0 && his_state_is_will(option)) ||
+		    his_want_state_is_will(option))
+			return;
+		/*
+		 * Special case for TELOPT_TM:  We send a DO, but pretend
+		 * that we sent a DONT, so that we can send more DOs if
+		 * we want to.
+		 */
+		if (option == TELOPT_TM)
+			set_his_want_state_wont(option);
+		else
+			set_his_want_state_will(option);
+		do_dont_resp[option]++;
+	}
+	(void) sprintf(nfrontp, (char *)doopt, option);
+	nfrontp += sizeof (dont) - 2;
+
+	DIAG(TD_OPTIONS, printoption("td: send do", option));
+}
+
+#ifdef	AUTHENTICATION
+extern void auth_request();
+#endif
+#ifdef	LINEMODE
+extern void doclientstat();
+#endif
+#ifdef	ENCRYPTION
+extern void encrypt_send_support();
+#endif	/* ENCRYPTION */
+
+	void
+willoption(option)
+	int option;
+{
+	int changeok = 0;
+	void (*func)() = 0;
+
+	/*
+	 * process input from peer.
+	 */
+
+	DIAG(TD_OPTIONS, printoption("td: recv will", option));
+
+	if (do_dont_resp[option]) {
+		do_dont_resp[option]--;
+		if (do_dont_resp[option] && his_state_is_will(option))
+			do_dont_resp[option]--;
+	}
+	if (do_dont_resp[option] == 0) {
+	    if (his_want_state_is_wont(option)) {
+		switch (option) {
+
+		case TELOPT_BINARY:
+			init_termbuf();
+			tty_binaryin(1);
+			set_termbuf();
+			changeok++;
+			break;
+
+		case TELOPT_ECHO:
+			/*
+			 * See comments below for more info.
+			 */
+			not42 = 0;	/* looks like a 4.2 system */
+			break;
+
+		case TELOPT_TM:
+#if	defined(LINEMODE) && defined(KLUDGELINEMODE)
+			/*
+			 * This telnetd implementation does not really
+			 * support timing marks, it just uses them to
+			 * support the kludge linemode stuff.  If we
+			 * receive a will or wont TM in response to our
+			 * do TM request that may have been sent to
+			 * determine kludge linemode support, process
+			 * it, otherwise TM should get a negative
+			 * response back.
+			 */
+			/*
+			 * Handle the linemode kludge stuff.
+			 * If we are not currently supporting any
+			 * linemode at all, then we assume that this
+			 * is the client telling us to use kludge
+			 * linemode in response to our query.  Set the
+			 * linemode type that is to be supported, note
+			 * that the client wishes to use linemode, and
+			 * eat the will TM as though it never arrived.
+			 */
+			if (lmodetype < KLUDGE_LINEMODE) {
+				lmodetype = KLUDGE_LINEMODE;
+				clientstat(TELOPT_LINEMODE, WILL, 0);
+				send_wont(TELOPT_SGA, 1);
+			} else if (lmodetype == NO_AUTOKLUDGE) {
+				lmodetype = KLUDGE_OK;
+			}
+#endif	/* defined(LINEMODE) && defined(KLUDGELINEMODE) */
+			/*
+			 * We never respond to a WILL TM, and
+			 * we leave the state WONT.
+			 */
+			return;
+
+		case TELOPT_LFLOW:
+			/*
+			 * If we are going to support flow control
+			 * option, then don't worry peer that we can't
+			 * change the flow control characters.
+			 */
+			slctab[SLC_XON].defset.flag &= ~SLC_LEVELBITS;
+			slctab[SLC_XON].defset.flag |= SLC_DEFAULT;
+			slctab[SLC_XOFF].defset.flag &= ~SLC_LEVELBITS;
+			slctab[SLC_XOFF].defset.flag |= SLC_DEFAULT;
+		case TELOPT_TTYPE:
+		case TELOPT_SGA:
+		case TELOPT_NAWS:
+		case TELOPT_TSPEED:
+		case TELOPT_XDISPLOC:
+		case TELOPT_NEW_ENVIRON:
+		case TELOPT_OLD_ENVIRON:
+			changeok++;
+			break;
+
+#ifdef	LINEMODE
+		case TELOPT_LINEMODE:
+# ifdef	KLUDGELINEMODE
+			/*
+			 * Note client's desire to use linemode.
+			 */
+			lmodetype = REAL_LINEMODE;
+# endif	/* KLUDGELINEMODE */
+			func = doclientstat;
+			changeok++;
+			break;
+#endif	/* LINEMODE */
+
+#ifdef	AUTHENTICATION
+		case TELOPT_AUTHENTICATION:
+			func = auth_request;
+			changeok++;
+			break;
+#endif
+
+#ifdef	ENCRYPTION
+		case TELOPT_ENCRYPT:
+			func = encrypt_send_support;
+			changeok++;
+			break;
+#endif	/* ENCRYPTION */
+
+		default:
+			break;
+		}
+		if (changeok) {
+			set_his_want_state_will(option);
+			send_do(option, 0);
+		} else {
+			do_dont_resp[option]++;
+			send_dont(option, 0);
+		}
+	    } else {
+		/*
+		 * Option processing that should happen when
+		 * we receive conformation of a change in
+		 * state that we had requested.
+		 */
+		switch (option) {
+		case TELOPT_ECHO:
+			not42 = 0;	/* looks like a 4.2 system */
+			/*
+			 * Egads, he responded "WILL ECHO".  Turn
+			 * it off right now!
+			 */
+			send_dont(option, 1);
+			/*
+			 * "WILL ECHO".  Kludge upon kludge!
+			 * A 4.2 client is now echoing user input at
+			 * the tty.  This is probably undesireable and
+			 * it should be stopped.  The client will
+			 * respond WONT TM to the DO TM that we send to
+			 * check for kludge linemode.  When the WONT TM
+			 * arrives, linemode will be turned off and a
+			 * change propogated to the pty.  This change
+			 * will cause us to process the new pty state
+			 * in localstat(), which will notice that
+			 * linemode is off and send a WILL ECHO
+			 * so that we are properly in character mode and
+			 * all is well.
+			 */
+			break;
+#ifdef	LINEMODE
+		case TELOPT_LINEMODE:
+# ifdef	KLUDGELINEMODE
+			/*
+			 * Note client's desire to use linemode.
+			 */
+			lmodetype = REAL_LINEMODE;
+# endif	/* KLUDGELINEMODE */
+			func = doclientstat;
+			break;
+#endif	/* LINEMODE */
+
+#ifdef	AUTHENTICATION
+		case TELOPT_AUTHENTICATION:
+			func = auth_request;
+			break;
+#endif
+
+#ifdef	ENCRYPTION
+		case TELOPT_ENCRYPT:
+			func = encrypt_send_support;
+			break;
+#endif	/* ENCRYPTION */
+		case TELOPT_LFLOW:
+			func = flowstat;
+			break;
+		}
+	    }
+	}
+	set_his_state_will(option);
+	if (func)
+		(*func)();
+}  /* end of willoption */
+
+	void
+send_dont(option, init)
+	int option, init;
+{
+	if (init) {
+		if ((do_dont_resp[option] == 0 && his_state_is_wont(option)) ||
+		    his_want_state_is_wont(option))
+			return;
+		set_his_want_state_wont(option);
+		do_dont_resp[option]++;
+	}
+	(void) sprintf(nfrontp, (char *)dont, option);
+	nfrontp += sizeof (doopt) - 2;
+
+	DIAG(TD_OPTIONS, printoption("td: send dont", option));
+}
+
+	void
+wontoption(option)
+	int option;
+{
+	/*
+	 * Process client input.
+	 */
+
+	DIAG(TD_OPTIONS, printoption("td: recv wont", option));
+
+	if (do_dont_resp[option]) {
+		do_dont_resp[option]--;
+		if (do_dont_resp[option] && his_state_is_wont(option))
+			do_dont_resp[option]--;
+	}
+	if (do_dont_resp[option] == 0) {
+	    if (his_want_state_is_will(option)) {
+		/* it is always ok to change to negative state */
+		switch (option) {
+		case TELOPT_ECHO:
+			not42 = 1; /* doesn't seem to be a 4.2 system */
+			break;
+
+		case TELOPT_BINARY:
+			init_termbuf();
+			tty_binaryin(0);
+			set_termbuf();
+			break;
+
+#ifdef	LINEMODE
+		case TELOPT_LINEMODE:
+# ifdef	KLUDGELINEMODE
+			/*
+			 * If real linemode is supported, then client is
+			 * asking to turn linemode off.
+			 */
+			if (lmodetype != REAL_LINEMODE)
+				break;
+# endif	/* KLUDGELINEMODE */
+			clientstat(TELOPT_LINEMODE, WONT, 0);
+			break;
+#endif	/* LINEMODE */
+
+		case TELOPT_TM:
+			/*
+			 * If we get a WONT TM, and had sent a DO TM,
+			 * don't respond with a DONT TM, just leave it
+			 * as is.  Short circut the state machine to
+			 * achive this.
+			 */
+			set_his_want_state_wont(TELOPT_TM);
+			return;
+
+		case TELOPT_LFLOW:
+			/*
+			 * If we are not going to support flow control
+			 * option, then let peer know that we can't
+			 * change the flow control characters.
+			 */
+			slctab[SLC_XON].defset.flag &= ~SLC_LEVELBITS;
+			slctab[SLC_XON].defset.flag |= SLC_CANTCHANGE;
+			slctab[SLC_XOFF].defset.flag &= ~SLC_LEVELBITS;
+			slctab[SLC_XOFF].defset.flag |= SLC_CANTCHANGE;
+			break;
+
+#if	defined(AUTHENTICATION)
+		case TELOPT_AUTHENTICATION:
+			auth_finished(0, AUTH_REJECT);
+			break;
+#endif
+
+		/*
+		 * For options that we might spin waiting for
+		 * sub-negotiation, if the client turns off the
+		 * option rather than responding to the request,
+		 * we have to treat it here as if we got a response
+		 * to the sub-negotiation, (by updating the timers)
+		 * so that we'll break out of the loop.
+		 */
+		case TELOPT_TTYPE:
+			settimer(ttypesubopt);
+			break;
+
+		case TELOPT_TSPEED:
+			settimer(tspeedsubopt);
+			break;
+
+		case TELOPT_XDISPLOC:
+			settimer(xdisplocsubopt);
+			break;
+
+		case TELOPT_OLD_ENVIRON:
+			settimer(oenvironsubopt);
+			break;
+
+		case TELOPT_NEW_ENVIRON:
+			settimer(environsubopt);
+			break;
+
+		default:
+			break;
+		}
+		set_his_want_state_wont(option);
+		if (his_state_is_will(option))
+			send_dont(option, 0);
+	    } else {
+		switch (option) {
+		case TELOPT_TM:
+#if	defined(LINEMODE) && defined(KLUDGELINEMODE)
+			if (lmodetype < NO_AUTOKLUDGE) {
+				lmodetype = NO_LINEMODE;
+				clientstat(TELOPT_LINEMODE, WONT, 0);
+				send_will(TELOPT_SGA, 1);
+				send_will(TELOPT_ECHO, 1);
+			}
+#endif	/* defined(LINEMODE) && defined(KLUDGELINEMODE) */
+			break;
+
+#if	defined(AUTHENTICATION)
+		case TELOPT_AUTHENTICATION:
+			auth_finished(0, AUTH_REJECT);
+			break;
+#endif
+		default:
+			break;
+		}
+	    }
+	}
+	set_his_state_wont(option);
+
+}  /* end of wontoption */
+
+	void
+send_will(option, init)
+	int option, init;
+{
+	if (init) {
+		if ((will_wont_resp[option] == 0 && my_state_is_will(option))||
+		    my_want_state_is_will(option))
+			return;
+		set_my_want_state_will(option);
+		will_wont_resp[option]++;
+	}
+	(void) sprintf(nfrontp, (char *)will, option);
+	nfrontp += sizeof (doopt) - 2;
+
+	DIAG(TD_OPTIONS, printoption("td: send will", option));
+}
+
+#if	!defined(LINEMODE) || !defined(KLUDGELINEMODE)
+/*
+ * When we get a DONT SGA, we will try once to turn it
+ * back on.  If the other side responds DONT SGA, we
+ * leave it at that.  This is so that when we talk to
+ * clients that understand KLUDGELINEMODE but not LINEMODE,
+ * we'll keep them in char-at-a-time mode.
+ */
+int turn_on_sga = 0;
+#endif
+
+	void
+dooption(option)
+	int option;
+{
+	int changeok = 0;
+
+	/*
+	 * Process client input.
+	 */
+
+	DIAG(TD_OPTIONS, printoption("td: recv do", option));
+
+	if (will_wont_resp[option]) {
+		will_wont_resp[option]--;
+		if (will_wont_resp[option] && my_state_is_will(option))
+			will_wont_resp[option]--;
+	}
+	if ((will_wont_resp[option] == 0) && (my_want_state_is_wont(option))) {
+		switch (option) {
+		case TELOPT_ECHO:
+#ifdef	LINEMODE
+# ifdef	KLUDGELINEMODE
+			if (lmodetype == NO_LINEMODE)
+# else
+			if (his_state_is_wont(TELOPT_LINEMODE))
+# endif
+#endif
+			{
+				init_termbuf();
+				tty_setecho(1);
+				set_termbuf();
+			}
+			changeok++;
+			break;
+
+		case TELOPT_BINARY:
+			init_termbuf();
+			tty_binaryout(1);
+			set_termbuf();
+			changeok++;
+			break;
+
+		case TELOPT_SGA:
+#if	defined(LINEMODE) && defined(KLUDGELINEMODE)
+			/*
+			 * If kludge linemode is in use, then we must
+			 * process an incoming do SGA for linemode
+			 * purposes.
+			 */
+			if (lmodetype == KLUDGE_LINEMODE) {
+				/*
+				 * Receipt of "do SGA" in kludge
+				 * linemode is the peer asking us to
+				 * turn off linemode.  Make note of
+				 * the request.
+				 */
+				clientstat(TELOPT_LINEMODE, WONT, 0);
+				/*
+				 * If linemode did not get turned off
+				 * then don't tell peer that we did.
+				 * Breaking here forces a wont SGA to
+				 * be returned.
+				 */
+				if (linemode)
+					break;
+			}
+#else
+			turn_on_sga = 0;
+#endif	/* defined(LINEMODE) && defined(KLUDGELINEMODE) */
+			changeok++;
+			break;
+
+		case TELOPT_STATUS:
+			changeok++;
+			break;
+
+		case TELOPT_TM:
+			/*
+			 * Special case for TM.  We send a WILL, but
+			 * pretend we sent a WONT.
+			 */
+			send_will(option, 0);
+			set_my_want_state_wont(option);
+			set_my_state_wont(option);
+			return;
+
+		case TELOPT_LOGOUT:
+			/*
+			 * When we get a LOGOUT option, respond
+			 * with a WILL LOGOUT, make sure that
+			 * it gets written out to the network,
+			 * and then just go away...
+			 */
+			set_my_want_state_will(TELOPT_LOGOUT);
+			send_will(TELOPT_LOGOUT, 0);
+			set_my_state_will(TELOPT_LOGOUT);
+			(void)netflush();
+			cleanup(0);
+			/* NOT REACHED */
+			break;
+
+#ifdef	ENCRYPTION
+		case TELOPT_ENCRYPT:
+			changeok++;
+			break;
+#endif	/* ENCRYPTION */
+		case TELOPT_LINEMODE:
+		case TELOPT_TTYPE:
+		case TELOPT_NAWS:
+		case TELOPT_TSPEED:
+		case TELOPT_LFLOW:
+		case TELOPT_XDISPLOC:
+#ifdef	TELOPT_ENVIRON
+		case TELOPT_NEW_ENVIRON:
+#endif
+		case TELOPT_OLD_ENVIRON:
+		default:
+			break;
+		}
+		if (changeok) {
+			set_my_want_state_will(option);
+			send_will(option, 0);
+		} else {
+			will_wont_resp[option]++;
+			send_wont(option, 0);
+		}
+	}
+	set_my_state_will(option);
+
+}  /* end of dooption */
+
+	void
+send_wont(option, init)
+	int option, init;
+{
+	if (init) {
+		if ((will_wont_resp[option] == 0 && my_state_is_wont(option)) ||
+		    my_want_state_is_wont(option))
+			return;
+		set_my_want_state_wont(option);
+		will_wont_resp[option]++;
+	}
+	(void) sprintf(nfrontp, (char *)wont, option);
+	nfrontp += sizeof (wont) - 2;
+
+	DIAG(TD_OPTIONS, printoption("td: send wont", option));
+}
+
+	void
+dontoption(option)
+	int option;
+{
+	/*
+	 * Process client input.
+	 */
+
+
+	DIAG(TD_OPTIONS, printoption("td: recv dont", option));
+
+	if (will_wont_resp[option]) {
+		will_wont_resp[option]--;
+		if (will_wont_resp[option] && my_state_is_wont(option))
+			will_wont_resp[option]--;
+	}
+	if ((will_wont_resp[option] == 0) && (my_want_state_is_will(option))) {
+		switch (option) {
+		case TELOPT_BINARY:
+			init_termbuf();
+			tty_binaryout(0);
+			set_termbuf();
+			break;
+
+		case TELOPT_ECHO:	/* we should stop echoing */
+#ifdef	LINEMODE
+# ifdef	KLUDGELINEMODE
+			if ((lmodetype != REAL_LINEMODE) &&
+			    (lmodetype != KLUDGE_LINEMODE))
+# else
+			if (his_state_is_wont(TELOPT_LINEMODE))
+# endif
+#endif
+			{
+				init_termbuf();
+				tty_setecho(0);
+				set_termbuf();
+			}
+			break;
+
+		case TELOPT_SGA:
+#if	defined(LINEMODE) && defined(KLUDGELINEMODE)
+			/*
+			 * If kludge linemode is in use, then we
+			 * must process an incoming do SGA for
+			 * linemode purposes.
+			 */
+			if ((lmodetype == KLUDGE_LINEMODE) ||
+			    (lmodetype == KLUDGE_OK)) {
+				/*
+				 * The client is asking us to turn
+				 * linemode on.
+				 */
+				lmodetype = KLUDGE_LINEMODE;
+				clientstat(TELOPT_LINEMODE, WILL, 0);
+				/*
+				 * If we did not turn line mode on,
+				 * then what do we say?  Will SGA?
+				 * This violates design of telnet.
+				 * Gross.  Very Gross.
+				 */
+			}
+			break;
+#else
+			set_my_want_state_wont(option);
+			if (my_state_is_will(option))
+				send_wont(option, 0);
+			set_my_state_wont(option);
+			if (turn_on_sga ^= 1)
+				send_will(option, 1);
+			return;
+#endif	/* defined(LINEMODE) && defined(KLUDGELINEMODE) */
+
+		default:
+			break;
+		}
+
+		set_my_want_state_wont(option);
+		if (my_state_is_will(option))
+			send_wont(option, 0);
+	}
+	set_my_state_wont(option);
+
+}  /* end of dontoption */
+
+#ifdef	ENV_HACK
+int env_ovar = -1;
+int env_ovalue = -1;
+#else	/* ENV_HACK */
+# define env_ovar OLD_ENV_VAR
+# define env_ovalue OLD_ENV_VALUE
+#endif	/* ENV_HACK */
+
+/*
+ * suboption()
+ *
+ *	Look at the sub-option buffer, and try to be helpful to the other
+ * side.
+ *
+ *	Currently we recognize:
+ *
+ *	Terminal type is
+ *	Linemode
+ *	Window size
+ *	Terminal speed
+ */
+	void
+suboption()
+{
+    register int subchar;
+
+    DIAG(TD_OPTIONS, {netflush(); printsub('<', subpointer, SB_LEN()+2);});
+
+    subchar = SB_GET();
+    switch (subchar) {
+    case TELOPT_TSPEED: {
+	register int xspeed, rspeed;
+
+	if (his_state_is_wont(TELOPT_TSPEED))	/* Ignore if option disabled */
+		break;
+
+	settimer(tspeedsubopt);
+
+	if (SB_EOF() || SB_GET() != TELQUAL_IS)
+		return;
+
+	xspeed = atoi((char *)subpointer);
+
+	while (SB_GET() != ',' && !SB_EOF());
+	if (SB_EOF())
+		return;
+
+	rspeed = atoi((char *)subpointer);
+	clientstat(TELOPT_TSPEED, xspeed, rspeed);
+
+	break;
+
+    }  /* end of case TELOPT_TSPEED */
+
+    case TELOPT_TTYPE: {		/* Yaaaay! */
+	static char terminalname[41];
+
+	if (his_state_is_wont(TELOPT_TTYPE))	/* Ignore if option disabled */
+		break;
+	settimer(ttypesubopt);
+
+	if (SB_EOF() || SB_GET() != TELQUAL_IS) {
+	    return;		/* ??? XXX but, this is the most robust */
+	}
+
+	terminaltype = terminalname;
+
+	while ((terminaltype < (terminalname + sizeof terminalname-1)) &&
+								    !SB_EOF()) {
+	    register int c;
+
+	    c = SB_GET();
+	    if (isupper(c)) {
+		c = tolower(c);
+	    }
+	    *terminaltype++ = c;    /* accumulate name */
+	}
+	*terminaltype = 0;
+	terminaltype = terminalname;
+	break;
+    }  /* end of case TELOPT_TTYPE */
+
+    case TELOPT_NAWS: {
+	register int xwinsize, ywinsize;
+
+	if (his_state_is_wont(TELOPT_NAWS))	/* Ignore if option disabled */
+		break;
+
+	if (SB_EOF())
+		return;
+	xwinsize = SB_GET() << 8;
+	if (SB_EOF())
+		return;
+	xwinsize |= SB_GET();
+	if (SB_EOF())
+		return;
+	ywinsize = SB_GET() << 8;
+	if (SB_EOF())
+		return;
+	ywinsize |= SB_GET();
+	clientstat(TELOPT_NAWS, xwinsize, ywinsize);
+
+	break;
+
+    }  /* end of case TELOPT_NAWS */
+
+#ifdef	LINEMODE
+    case TELOPT_LINEMODE: {
+	register int request;
+
+	if (his_state_is_wont(TELOPT_LINEMODE))	/* Ignore if option disabled */
+		break;
+	/*
+	 * Process linemode suboptions.
+	 */
+	if (SB_EOF())
+	    break;		/* garbage was sent */
+	request = SB_GET();	/* get will/wont */
+
+	if (SB_EOF())
+	    break;		/* another garbage check */
+
+	if (request == LM_SLC) {  /* SLC is not preceeded by WILL or WONT */
+		/*
+		 * Process suboption buffer of slc's
+		 */
+		start_slc(1);
+		do_opt_slc(subpointer, subend - subpointer);
+		(void) end_slc(0);
+		break;
+	} else if (request == LM_MODE) {
+		if (SB_EOF())
+		    return;
+		useeditmode = SB_GET();  /* get mode flag */
+		clientstat(LM_MODE, 0, 0);
+		break;
+	}
+
+	if (SB_EOF())
+	    break;
+	switch (SB_GET()) {  /* what suboption? */
+	case LM_FORWARDMASK:
+		/*
+		 * According to spec, only server can send request for
+		 * forwardmask, and client can only return a positive response.
+		 * So don't worry about it.
+		 */
+
+	default:
+		break;
+	}
+	break;
+    }  /* end of case TELOPT_LINEMODE */
+#endif
+    case TELOPT_STATUS: {
+	int mode;
+
+	if (SB_EOF())
+	    break;
+	mode = SB_GET();
+	switch (mode) {
+	case TELQUAL_SEND:
+	    if (my_state_is_will(TELOPT_STATUS))
+		send_status();
+	    break;
+
+	case TELQUAL_IS:
+	    break;
+
+	default:
+	    break;
+	}
+	break;
+    }  /* end of case TELOPT_STATUS */
+
+    case TELOPT_XDISPLOC: {
+	if (SB_EOF() || SB_GET() != TELQUAL_IS)
+		return;
+	settimer(xdisplocsubopt);
+	subpointer[SB_LEN()] = '\0';
+	(void)setenv("DISPLAY", (char *)subpointer, 1);
+	break;
+    }  /* end of case TELOPT_XDISPLOC */
+
+#ifdef	TELOPT_NEW_ENVIRON
+    case TELOPT_NEW_ENVIRON:
+#endif
+    case TELOPT_OLD_ENVIRON: {
+	register int c;
+	register char *cp, *varp, *valp;
+
+	if (SB_EOF())
+		return;
+	c = SB_GET();
+	if (c == TELQUAL_IS) {
+		if (subchar == TELOPT_OLD_ENVIRON)
+			settimer(oenvironsubopt);
+		else
+			settimer(environsubopt);
+	} else if (c != TELQUAL_INFO) {
+		return;
+	}
+
+#ifdef	TELOPT_NEW_ENVIRON
+	if (subchar == TELOPT_NEW_ENVIRON) {
+	    while (!SB_EOF()) {
+		c = SB_GET();
+		if ((c == NEW_ENV_VAR) || (c == ENV_USERVAR))
+			break;
+	    }
+	} else
+#endif
+	{
+#ifdef	ENV_HACK
+	    /*
+	     * We only want to do this if we haven't already decided
+	     * whether or not the other side has its VALUE and VAR
+	     * reversed.
+	     */
+	    if (env_ovar < 0) {
+		register int last = -1;		/* invalid value */
+		int empty = 0;
+		int got_var = 0, got_value = 0, got_uservar = 0;
+
+		/*
+		 * The other side might have its VALUE and VAR values
+		 * reversed.  To be interoperable, we need to determine
+		 * which way it is.  If the first recognized character
+		 * is a VAR or VALUE, then that will tell us what
+		 * type of client it is.  If the fist recognized
+		 * character is a USERVAR, then we continue scanning
+		 * the suboption looking for two consecutive
+		 * VAR or VALUE fields.  We should not get two
+		 * consecutive VALUE fields, so finding two
+		 * consecutive VALUE or VAR fields will tell us
+		 * what the client is.
+		 */
+		SB_SAVE();
+		while (!SB_EOF()) {
+			c = SB_GET();
+			switch(c) {
+			case OLD_ENV_VAR:
+				if (last < 0 || last == OLD_ENV_VAR
+				    || (empty && (last == OLD_ENV_VALUE)))
+					goto env_ovar_ok;
+				got_var++;
+				last = OLD_ENV_VAR;
+				break;
+			case OLD_ENV_VALUE:
+				if (last < 0 || last == OLD_ENV_VALUE
+				    || (empty && (last == OLD_ENV_VAR)))
+					goto env_ovar_wrong;
+				got_value++;
+				last = OLD_ENV_VALUE;
+				break;
+			case ENV_USERVAR:
+				/* count strings of USERVAR as one */
+				if (last != ENV_USERVAR)
+					got_uservar++;
+				if (empty) {
+					if (last == OLD_ENV_VALUE)
+						goto env_ovar_ok;
+					if (last == OLD_ENV_VAR)
+						goto env_ovar_wrong;
+				}
+				last = ENV_USERVAR;
+				break;
+			case ENV_ESC:
+				if (!SB_EOF())
+					c = SB_GET();
+				/* FALL THROUGH */
+			default:
+				empty = 0;
+				continue;
+			}
+			empty = 1;
+		}
+		if (empty) {
+			if (last == OLD_ENV_VALUE)
+				goto env_ovar_ok;
+			if (last == OLD_ENV_VAR)
+				goto env_ovar_wrong;
+		}
+		/*
+		 * Ok, the first thing was a USERVAR, and there
+		 * are not two consecutive VAR or VALUE commands,
+		 * and none of the VAR or VALUE commands are empty.
+		 * If the client has sent us a well-formed option,
+		 * then the number of VALUEs received should always
+		 * be less than or equal to the number of VARs and
+		 * USERVARs received.
+		 *
+		 * If we got exactly as many VALUEs as VARs and
+		 * USERVARs, the client has the same definitions.
+		 *
+		 * If we got exactly as many VARs as VALUEs and
+		 * USERVARS, the client has reversed definitions.
+		 */
+		if (got_uservar + got_var == got_value) {
+	    env_ovar_ok:
+			env_ovar = OLD_ENV_VAR;
+			env_ovalue = OLD_ENV_VALUE;
+		} else if (got_uservar + got_value == got_var) {
+	    env_ovar_wrong:
+			env_ovar = OLD_ENV_VALUE;
+			env_ovalue = OLD_ENV_VAR;
+			DIAG(TD_OPTIONS, {sprintf(nfrontp,
+				"ENVIRON VALUE and VAR are reversed!\r\n");
+				nfrontp += strlen(nfrontp);});
+
+		}
+	    }
+	    SB_RESTORE();
+#endif
+
+	    while (!SB_EOF()) {
+		c = SB_GET();
+		if ((c == env_ovar) || (c == ENV_USERVAR))
+			break;
+	    }
+	}
+
+	if (SB_EOF())
+		return;
+
+	cp = varp = (char *)subpointer;
+	valp = 0;
+
+	while (!SB_EOF()) {
+		c = SB_GET();
+		if (subchar == TELOPT_OLD_ENVIRON) {
+			if (c == env_ovar)
+				c = NEW_ENV_VAR;
+			else if (c == env_ovalue)
+				c = NEW_ENV_VALUE;
+		}
+		switch (c) {
+
+		case NEW_ENV_VALUE:
+			*cp = '\0';
+			cp = valp = (char *)subpointer;
+			break;
+
+		case NEW_ENV_VAR:
+		case ENV_USERVAR:
+			*cp = '\0';
+			if (valp)
+				(void)setenv(varp, valp, 1);
+			else
+				unsetenv(varp);
+			cp = varp = (char *)subpointer;
+			valp = 0;
+			break;
+
+		case ENV_ESC:
+			if (SB_EOF())
+				break;
+			c = SB_GET();
+			/* FALL THROUGH */
+		default:
+			*cp++ = c;
+			break;
+		}
+	}
+	*cp = '\0';
+	if (valp)
+		(void)setenv(varp, valp, 1);
+	else
+		unsetenv(varp);
+	break;
+    }  /* end of case TELOPT_NEW_ENVIRON */
+#if	defined(AUTHENTICATION)
+    case TELOPT_AUTHENTICATION:
+	if (SB_EOF())
+		break;
+	switch(SB_GET()) {
+	case TELQUAL_SEND:
+	case TELQUAL_REPLY:
+		/*
+		 * These are sent by us and cannot be sent by
+		 * the client.
+		 */
+		break;
+	case TELQUAL_IS:
+		auth_is(subpointer, SB_LEN());
+		break;
+	case TELQUAL_NAME:
+		auth_name(subpointer, SB_LEN());
+		break;
+	}
+	break;
+#endif
+#ifdef	ENCRYPTION
+    case TELOPT_ENCRYPT:
+	if (SB_EOF())
+		break;
+	switch(SB_GET()) {
+	case ENCRYPT_SUPPORT:
+		encrypt_support(subpointer, SB_LEN());
+		break;
+	case ENCRYPT_IS:
+		encrypt_is(subpointer, SB_LEN());
+		break;
+	case ENCRYPT_REPLY:
+		encrypt_reply(subpointer, SB_LEN());
+		break;
+	case ENCRYPT_START:
+		encrypt_start(subpointer, SB_LEN());
+		break;
+	case ENCRYPT_END:
+		encrypt_end();
+		break;
+	case ENCRYPT_REQSTART:
+		encrypt_request_start(subpointer, SB_LEN());
+		break;
+	case ENCRYPT_REQEND:
+		/*
+		 * We can always send an REQEND so that we cannot
+		 * get stuck encrypting.  We should only get this
+		 * if we have been able to get in the correct mode
+		 * anyhow.
+		 */
+		encrypt_request_end();
+		break;
+	case ENCRYPT_ENC_KEYID:
+		encrypt_enc_keyid(subpointer, SB_LEN());
+		break;
+	case ENCRYPT_DEC_KEYID:
+		encrypt_dec_keyid(subpointer, SB_LEN());
+		break;
+	default:
+		break;
+	}
+	break;
+#endif	/* ENCRYPTION */
+
+    default:
+	break;
+    }  /* end of switch */
+
+}  /* end of suboption */
+
+	void
+doclientstat()
+{
+	clientstat(TELOPT_LINEMODE, WILL, 0);
+}
+
+#define	ADD(c)	 *ncp++ = c
+#define	ADD_DATA(c) { *ncp++ = c; if (c == SE || c == IAC) *ncp++ = c; }
+	void
+send_status()
+{
+	unsigned char statusbuf[256];
+	register unsigned char *ncp;
+	register unsigned char i;
+
+	ncp = statusbuf;
+
+	netflush();	/* get rid of anything waiting to go out */
+
+	ADD(IAC);
+	ADD(SB);
+	ADD(TELOPT_STATUS);
+	ADD(TELQUAL_IS);
+
+	/*
+	 * We check the want_state rather than the current state,
+	 * because if we received a DO/WILL for an option that we
+	 * don't support, and the other side didn't send a DONT/WONT
+	 * in response to our WONT/DONT, then the "state" will be
+	 * WILL/DO, and the "want_state" will be WONT/DONT.  We
+	 * need to go by the latter.
+	 */
+	for (i = 0; i < (unsigned char)NTELOPTS; i++) {
+		if (my_want_state_is_will(i)) {
+			ADD(WILL);
+			ADD_DATA(i);
+		}
+		if (his_want_state_is_will(i)) {
+			ADD(DO);
+			ADD_DATA(i);
+		}
+	}
+
+	if (his_want_state_is_will(TELOPT_LFLOW)) {
+		ADD(SB);
+		ADD(TELOPT_LFLOW);
+		if (flowmode) {
+			ADD(LFLOW_ON);
+		} else {
+			ADD(LFLOW_OFF);
+		}
+		ADD(SE);
+
+		if (restartany >= 0) {
+			ADD(SB);
+			ADD(TELOPT_LFLOW);
+			if (restartany) {
+				ADD(LFLOW_RESTART_ANY);
+			} else {
+				ADD(LFLOW_RESTART_XON);
+			}
+			ADD(SE);
+		}
+	}
+
+#ifdef	LINEMODE
+	if (his_want_state_is_will(TELOPT_LINEMODE)) {
+		unsigned char *cp, *cpe;
+		int len;
+
+		ADD(SB);
+		ADD(TELOPT_LINEMODE);
+		ADD(LM_MODE);
+		ADD_DATA(editmode);
+		ADD(SE);
+
+		ADD(SB);
+		ADD(TELOPT_LINEMODE);
+		ADD(LM_SLC);
+		start_slc(0);
+		send_slc();
+		len = end_slc(&cp);
+		for (cpe = cp + len; cp < cpe; cp++)
+			ADD_DATA(*cp);
+		ADD(SE);
+	}
+#endif	/* LINEMODE */
+
+	ADD(IAC);
+	ADD(SE);
+
+	writenet(statusbuf, ncp - statusbuf);
+	netflush();	/* Send it on its way */
+
+	DIAG(TD_OPTIONS,
+		{printsub('>', statusbuf, ncp - statusbuf); netflush();});
+}
diff --git a/contrib/telnet/telnetd/sys_term.c b/contrib/telnet/telnetd/sys_term.c
new file mode 100644
index 0000000..67a2f94
--- /dev/null
+++ b/contrib/telnet/telnetd/sys_term.c
@@ -0,0 +1,2303 @@
+/*
+ * Copyright (c) 1989, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef lint
+static char sccsid[] = "@(#)sys_term.c	8.4+1 (Berkeley) 5/30/95";
+#endif /* not lint */
+
+#include "telnetd.h"
+#include "pathnames.h"
+
+#if	defined(AUTHENTICATION)
+#include <libtelnet/auth.h>
+#endif
+
+#if defined(CRAY) || defined(__hpux)
+# define PARENT_DOES_UTMP
+#endif
+
+#ifdef	NEWINIT
+#include <initreq.h>
+int	utmp_len = MAXHOSTNAMELEN;	/* sizeof(init_request.host) */
+#else	/* NEWINIT*/
+# ifdef	UTMPX
+# include <utmpx.h>
+struct	utmpx wtmp;
+# else
+# include <utmp.h>
+struct	utmp wtmp;
+# endif /* UTMPX */
+
+int	utmp_len = sizeof(wtmp.ut_host);
+# ifndef PARENT_DOES_UTMP
+char	wtmpf[]	= "/usr/adm/wtmp";
+char	utmpf[] = "/etc/utmp";
+# else /* PARENT_DOES_UTMP */
+char	wtmpf[]	= "/etc/wtmp";
+# endif /* PARENT_DOES_UTMP */
+
+# ifdef CRAY
+#include <tmpdir.h>
+#include <sys/wait.h>
+#  if (UNICOS_LVL == '7.0') || (UNICOS_LVL == '7.1')
+#   define UNICOS7x
+#  endif
+
+#  ifdef UNICOS7x
+#include <sys/sysv.h>
+#include <sys/secstat.h>
+extern int secflag;
+extern struct sysv sysv;
+#  endif /* UNICOS7x */
+# endif	/* CRAY */
+#endif	/* NEWINIT */
+
+#ifdef	STREAMSPTY
+#include <sac.h>
+#include <sys/stropts.h>
+#endif
+
+#define SCPYN(a, b)	(void) strncpy(a, b, sizeof(a))
+#define SCMPN(a, b)	strncmp(a, b, sizeof(a))
+
+#ifdef	STREAMS
+#include <sys/stream.h>
+#endif
+#ifdef __hpux
+#include <sys/resource.h>
+#include <sys/proc.h>
+#endif
+#include <sys/tty.h>
+#ifdef	t_erase
+#undef	t_erase
+#undef	t_kill
+#undef	t_intrc
+#undef	t_quitc
+#undef	t_startc
+#undef	t_stopc
+#undef	t_eofc
+#undef	t_brkc
+#undef	t_suspc
+#undef	t_dsuspc
+#undef	t_rprntc
+#undef	t_flushc
+#undef	t_werasc
+#undef	t_lnextc
+#endif
+
+#if defined(UNICOS5) && defined(CRAY2) && !defined(EXTPROC)
+# define EXTPROC 0400
+#endif
+
+#ifndef	USE_TERMIO
+struct termbuf {
+	struct sgttyb sg;
+	struct tchars tc;
+	struct ltchars ltc;
+	int state;
+	int lflags;
+} termbuf, termbuf2;
+# define	cfsetospeed(tp, val)	(tp)->sg.sg_ospeed = (val)
+# define	cfsetispeed(tp, val)	(tp)->sg.sg_ispeed = (val)
+# define	cfgetospeed(tp)		(tp)->sg.sg_ospeed
+# define	cfgetispeed(tp)		(tp)->sg.sg_ispeed
+#else	/* USE_TERMIO */
+# ifdef	SYSV_TERMIO
+#	define termios termio
+# endif
+# ifndef	TCSANOW
+#  ifdef TCSETS
+#   define	TCSANOW		TCSETS
+#   define	TCSADRAIN	TCSETSW
+#   define	tcgetattr(f, t)	ioctl(f, TCGETS, (char *)t)
+#  else
+#   ifdef TCSETA
+#    define	TCSANOW		TCSETA
+#    define	TCSADRAIN	TCSETAW
+#    define	tcgetattr(f, t)	ioctl(f, TCGETA, (char *)t)
+#   else
+#    define	TCSANOW		TIOCSETA
+#    define	TCSADRAIN	TIOCSETAW
+#    define	tcgetattr(f, t)	ioctl(f, TIOCGETA, (char *)t)
+#   endif
+#  endif
+#  define	tcsetattr(f, a, t)	ioctl(f, a, t)
+#  define	cfsetospeed(tp, val)	(tp)->c_cflag &= ~CBAUD; \
+					(tp)->c_cflag |= (val)
+#  define	cfgetospeed(tp)		((tp)->c_cflag & CBAUD)
+#  ifdef CIBAUD
+#   define	cfsetispeed(tp, val)	(tp)->c_cflag &= ~CIBAUD; \
+					(tp)->c_cflag |= ((val)<<IBSHIFT)
+#   define	cfgetispeed(tp)		(((tp)->c_cflag & CIBAUD)>>IBSHIFT)
+#  else
+#   define	cfsetispeed(tp, val)	(tp)->c_cflag &= ~CBAUD; \
+					(tp)->c_cflag |= (val)
+#   define	cfgetispeed(tp)		((tp)->c_cflag & CBAUD)
+#  endif
+# endif /* TCSANOW */
+struct termios termbuf, termbuf2;	/* pty control structure */
+# ifdef  STREAMSPTY
+int ttyfd = -1;
+# endif
+#endif	/* USE_TERMIO */
+
+/*
+ * init_termbuf()
+ * copy_termbuf(cp)
+ * set_termbuf()
+ *
+ * These three routines are used to get and set the "termbuf" structure
+ * to and from the kernel.  init_termbuf() gets the current settings.
+ * copy_termbuf() hands in a new "termbuf" to write to the kernel, and
+ * set_termbuf() writes the structure into the kernel.
+ */
+
+	void
+init_termbuf()
+{
+#ifndef	USE_TERMIO
+	(void) ioctl(pty, TIOCGETP, (char *)&termbuf.sg);
+	(void) ioctl(pty, TIOCGETC, (char *)&termbuf.tc);
+	(void) ioctl(pty, TIOCGLTC, (char *)&termbuf.ltc);
+# ifdef	TIOCGSTATE
+	(void) ioctl(pty, TIOCGSTATE, (char *)&termbuf.state);
+# endif
+#else
+# ifdef  STREAMSPTY
+	(void) tcgetattr(ttyfd, &termbuf);
+# else
+	(void) tcgetattr(pty, &termbuf);
+# endif
+#endif
+	termbuf2 = termbuf;
+}
+
+#if	defined(LINEMODE) && defined(TIOCPKT_IOCTL)
+	void
+copy_termbuf(cp, len)
+	char *cp;
+	int len;
+{
+	if (len > sizeof(termbuf))
+		len = sizeof(termbuf);
+	memmove((char *)&termbuf, cp, len);
+	termbuf2 = termbuf;
+}
+#endif	/* defined(LINEMODE) && defined(TIOCPKT_IOCTL) */
+
+	void
+set_termbuf()
+{
+	/*
+	 * Only make the necessary changes.
+	 */
+#ifndef	USE_TERMIO
+	if (memcmp((char *)&termbuf.sg, (char *)&termbuf2.sg,
+							sizeof(termbuf.sg)))
+		(void) ioctl(pty, TIOCSETN, (char *)&termbuf.sg);
+	if (memcmp((char *)&termbuf.tc, (char *)&termbuf2.tc,
+							sizeof(termbuf.tc)))
+		(void) ioctl(pty, TIOCSETC, (char *)&termbuf.tc);
+	if (memcmp((char *)&termbuf.ltc, (char *)&termbuf2.ltc,
+							sizeof(termbuf.ltc)))
+		(void) ioctl(pty, TIOCSLTC, (char *)&termbuf.ltc);
+	if (termbuf.lflags != termbuf2.lflags)
+		(void) ioctl(pty, TIOCLSET, (char *)&termbuf.lflags);
+#else	/* USE_TERMIO */
+	if (memcmp((char *)&termbuf, (char *)&termbuf2, sizeof(termbuf)))
+# ifdef  STREAMSPTY
+		(void) tcsetattr(ttyfd, TCSANOW, &termbuf);
+# else
+		(void) tcsetattr(pty, TCSANOW, &termbuf);
+# endif
+# if	defined(CRAY2) && defined(UNICOS5)
+	needtermstat = 1;
+# endif
+#endif	/* USE_TERMIO */
+}
+
+
+/*
+ * spcset(func, valp, valpp)
+ *
+ * This function takes various special characters (func), and
+ * sets *valp to the current value of that character, and
+ * *valpp to point to where in the "termbuf" structure that
+ * value is kept.
+ *
+ * It returns the SLC_ level of support for this function.
+ */
+
+#ifndef	USE_TERMIO
+	int
+spcset(func, valp, valpp)
+	int func;
+	cc_t *valp;
+	cc_t **valpp;
+{
+	switch(func) {
+	case SLC_EOF:
+		*valp = termbuf.tc.t_eofc;
+		*valpp = (cc_t *)&termbuf.tc.t_eofc;
+		return(SLC_VARIABLE);
+	case SLC_EC:
+		*valp = termbuf.sg.sg_erase;
+		*valpp = (cc_t *)&termbuf.sg.sg_erase;
+		return(SLC_VARIABLE);
+	case SLC_EL:
+		*valp = termbuf.sg.sg_kill;
+		*valpp = (cc_t *)&termbuf.sg.sg_kill;
+		return(SLC_VARIABLE);
+	case SLC_IP:
+		*valp = termbuf.tc.t_intrc;
+		*valpp = (cc_t *)&termbuf.tc.t_intrc;
+		return(SLC_VARIABLE|SLC_FLUSHIN|SLC_FLUSHOUT);
+	case SLC_ABORT:
+		*valp = termbuf.tc.t_quitc;
+		*valpp = (cc_t *)&termbuf.tc.t_quitc;
+		return(SLC_VARIABLE|SLC_FLUSHIN|SLC_FLUSHOUT);
+	case SLC_XON:
+		*valp = termbuf.tc.t_startc;
+		*valpp = (cc_t *)&termbuf.tc.t_startc;
+		return(SLC_VARIABLE);
+	case SLC_XOFF:
+		*valp = termbuf.tc.t_stopc;
+		*valpp = (cc_t *)&termbuf.tc.t_stopc;
+		return(SLC_VARIABLE);
+	case SLC_AO:
+		*valp = termbuf.ltc.t_flushc;
+		*valpp = (cc_t *)&termbuf.ltc.t_flushc;
+		return(SLC_VARIABLE);
+	case SLC_SUSP:
+		*valp = termbuf.ltc.t_suspc;
+		*valpp = (cc_t *)&termbuf.ltc.t_suspc;
+		return(SLC_VARIABLE);
+	case SLC_EW:
+		*valp = termbuf.ltc.t_werasc;
+		*valpp = (cc_t *)&termbuf.ltc.t_werasc;
+		return(SLC_VARIABLE);
+	case SLC_RP:
+		*valp = termbuf.ltc.t_rprntc;
+		*valpp = (cc_t *)&termbuf.ltc.t_rprntc;
+		return(SLC_VARIABLE);
+	case SLC_LNEXT:
+		*valp = termbuf.ltc.t_lnextc;
+		*valpp = (cc_t *)&termbuf.ltc.t_lnextc;
+		return(SLC_VARIABLE);
+	case SLC_FORW1:
+		*valp = termbuf.tc.t_brkc;
+		*valpp = (cc_t *)&termbuf.ltc.t_lnextc;
+		return(SLC_VARIABLE);
+	case SLC_BRK:
+	case SLC_SYNCH:
+	case SLC_AYT:
+	case SLC_EOR:
+		*valp = (cc_t)0;
+		*valpp = (cc_t *)0;
+		return(SLC_DEFAULT);
+	default:
+		*valp = (cc_t)0;
+		*valpp = (cc_t *)0;
+		return(SLC_NOSUPPORT);
+	}
+}
+
+#else	/* USE_TERMIO */
+
+	int
+spcset(func, valp, valpp)
+	int func;
+	cc_t *valp;
+	cc_t **valpp;
+{
+
+#define	setval(a, b)	*valp = termbuf.c_cc[a]; \
+			*valpp = &termbuf.c_cc[a]; \
+			return(b);
+#define	defval(a) *valp = ((cc_t)a); *valpp = (cc_t *)0; return(SLC_DEFAULT);
+
+	switch(func) {
+	case SLC_EOF:
+		setval(VEOF, SLC_VARIABLE);
+	case SLC_EC:
+		setval(VERASE, SLC_VARIABLE);
+	case SLC_EL:
+		setval(VKILL, SLC_VARIABLE);
+	case SLC_IP:
+		setval(VINTR, SLC_VARIABLE|SLC_FLUSHIN|SLC_FLUSHOUT);
+	case SLC_ABORT:
+		setval(VQUIT, SLC_VARIABLE|SLC_FLUSHIN|SLC_FLUSHOUT);
+	case SLC_XON:
+#ifdef	VSTART
+		setval(VSTART, SLC_VARIABLE);
+#else
+		defval(0x13);
+#endif
+	case SLC_XOFF:
+#ifdef	VSTOP
+		setval(VSTOP, SLC_VARIABLE);
+#else
+		defval(0x11);
+#endif
+	case SLC_EW:
+#ifdef	VWERASE
+		setval(VWERASE, SLC_VARIABLE);
+#else
+		defval(0);
+#endif
+	case SLC_RP:
+#ifdef	VREPRINT
+		setval(VREPRINT, SLC_VARIABLE);
+#else
+		defval(0);
+#endif
+	case SLC_LNEXT:
+#ifdef	VLNEXT
+		setval(VLNEXT, SLC_VARIABLE);
+#else
+		defval(0);
+#endif
+	case SLC_AO:
+#if	!defined(VDISCARD) && defined(VFLUSHO)
+# define VDISCARD VFLUSHO
+#endif
+#ifdef	VDISCARD
+		setval(VDISCARD, SLC_VARIABLE|SLC_FLUSHOUT);
+#else
+		defval(0);
+#endif
+	case SLC_SUSP:
+#ifdef	VSUSP
+		setval(VSUSP, SLC_VARIABLE|SLC_FLUSHIN);
+#else
+		defval(0);
+#endif
+#ifdef	VEOL
+	case SLC_FORW1:
+		setval(VEOL, SLC_VARIABLE);
+#endif
+#ifdef	VEOL2
+	case SLC_FORW2:
+		setval(VEOL2, SLC_VARIABLE);
+#endif
+	case SLC_AYT:
+#ifdef	VSTATUS
+		setval(VSTATUS, SLC_VARIABLE);
+#else
+		defval(0);
+#endif
+
+	case SLC_BRK:
+	case SLC_SYNCH:
+	case SLC_EOR:
+		defval(0);
+
+	default:
+		*valp = 0;
+		*valpp = 0;
+		return(SLC_NOSUPPORT);
+	}
+}
+#endif	/* USE_TERMIO */
+
+#ifdef CRAY
+/*
+ * getnpty()
+ *
+ * Return the number of pty's configured into the system.
+ */
+	int
+getnpty()
+{
+#ifdef _SC_CRAY_NPTY
+	int numptys;
+
+	if ((numptys = sysconf(_SC_CRAY_NPTY)) != -1)
+		return numptys;
+	else
+#endif /* _SC_CRAY_NPTY */
+		return 128;
+}
+#endif /* CRAY */
+
+#ifndef	convex
+/*
+ * getpty()
+ *
+ * Allocate a pty.  As a side effect, the external character
+ * array "line" contains the name of the slave side.
+ *
+ * Returns the file descriptor of the opened pty.
+ */
+#ifndef	__GNUC__
+char *line = "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0";
+#else
+static char Xline[] = "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0";
+char *line = Xline;
+#endif
+#ifdef	CRAY
+char *myline = "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0";
+#endif	/* CRAY */
+
+	int
+getpty(ptynum)
+int *ptynum;
+{
+	register int p;
+#ifdef	STREAMSPTY
+	int t;
+	char *ptsname();
+
+	p = open("/dev/ptmx", 2);
+	if (p > 0) {
+		grantpt(p);
+		unlockpt(p);
+		strcpy(line, ptsname(p));
+		return(p);
+	}
+
+#else	/* ! STREAMSPTY */
+#ifndef CRAY
+	register char *cp, *p1, *p2;
+	register int i;
+#if defined(sun) && defined(TIOCGPGRP) && BSD < 199207
+	int dummy;
+#endif
+
+#ifndef	__hpux
+	(void) sprintf(line, "/dev/ptyXX");
+	p1 = &line[8];
+	p2 = &line[9];
+#else
+	(void) sprintf(line, "/dev/ptym/ptyXX");
+	p1 = &line[13];
+	p2 = &line[14];
+#endif
+
+	for (cp = "pqrstuvwxyzPQRST"; *cp; cp++) {
+		struct stat stb;
+
+		*p1 = *cp;
+		*p2 = '0';
+		/*
+		 * This stat() check is just to keep us from
+		 * looping through all 256 combinations if there
+		 * aren't that many ptys available.
+		 */
+		if (stat(line, &stb) < 0)
+			break;
+		for (i = 0; i < 16; i++) {
+			*p2 = "0123456789abcdef"[i];
+			p = open(line, 2);
+			if (p > 0) {
+#ifndef	__hpux
+				line[5] = 't';
+#else
+				for (p1 = &line[8]; *p1; p1++)
+					*p1 = *(p1+1);
+				line[9] = 't';
+#endif
+				chown(line, 0, 0);
+				chmod(line, 0600);
+#if defined(sun) && defined(TIOCGPGRP) && BSD < 199207
+				if (ioctl(p, TIOCGPGRP, &dummy) == 0
+				    || errno != EIO) {
+					chmod(line, 0666);
+					close(p);
+					line[5] = 'p';
+				} else
+#endif /* defined(sun) && defined(TIOCGPGRP) && BSD < 199207 */
+					return(p);
+			}
+		}
+	}
+#else	/* CRAY */
+	extern lowpty, highpty;
+	struct stat sb;
+
+	for (*ptynum = lowpty; *ptynum <= highpty; (*ptynum)++) {
+		(void) sprintf(myline, "/dev/pty/%03d", *ptynum);
+		p = open(myline, 2);
+		if (p < 0)
+			continue;
+		(void) sprintf(line, "/dev/ttyp%03d", *ptynum);
+		/*
+		 * Here are some shenanigans to make sure that there
+		 * are no listeners lurking on the line.
+		 */
+		if(stat(line, &sb) < 0) {
+			(void) close(p);
+			continue;
+		}
+		if(sb.st_uid || sb.st_gid || sb.st_mode != 0600) {
+			chown(line, 0, 0);
+			chmod(line, 0600);
+			(void)close(p);
+			p = open(myline, 2);
+			if (p < 0)
+				continue;
+		}
+		/*
+		 * Now it should be safe...check for accessability.
+		 */
+		if (access(line, 6) == 0)
+			return(p);
+		else {
+			/* no tty side to pty so skip it */
+			(void) close(p);
+		}
+	}
+#endif	/* CRAY */
+#endif	/* STREAMSPTY */
+	return(-1);
+}
+#endif	/* convex */
+
+#ifdef	LINEMODE
+/*
+ * tty_flowmode()	Find out if flow control is enabled or disabled.
+ * tty_linemode()	Find out if linemode (external processing) is enabled.
+ * tty_setlinemod(on)	Turn on/off linemode.
+ * tty_isecho()		Find out if echoing is turned on.
+ * tty_setecho(on)	Enable/disable character echoing.
+ * tty_israw()		Find out if terminal is in RAW mode.
+ * tty_binaryin(on)	Turn on/off BINARY on input.
+ * tty_binaryout(on)	Turn on/off BINARY on output.
+ * tty_isediting()	Find out if line editing is enabled.
+ * tty_istrapsig()	Find out if signal trapping is enabled.
+ * tty_setedit(on)	Turn on/off line editing.
+ * tty_setsig(on)	Turn on/off signal trapping.
+ * tty_issofttab()	Find out if tab expansion is enabled.
+ * tty_setsofttab(on)	Turn on/off soft tab expansion.
+ * tty_islitecho()	Find out if typed control chars are echoed literally
+ * tty_setlitecho()	Turn on/off literal echo of control chars
+ * tty_tspeed(val)	Set transmit speed to val.
+ * tty_rspeed(val)	Set receive speed to val.
+ */
+
+#ifdef convex
+static int linestate;
+#endif
+
+	int
+tty_linemode()
+{
+#ifndef convex
+#ifndef	USE_TERMIO
+	return(termbuf.state & TS_EXTPROC);
+#else
+	return(termbuf.c_lflag & EXTPROC);
+#endif
+#else
+	return(linestate);
+#endif
+}
+
+	void
+tty_setlinemode(on)
+	int on;
+{
+#ifdef	TIOCEXT
+# ifndef convex
+	set_termbuf();
+# else
+	linestate = on;
+# endif
+	(void) ioctl(pty, TIOCEXT, (char *)&on);
+# ifndef convex
+	init_termbuf();
+# endif
+#else	/* !TIOCEXT */
+# ifdef	EXTPROC
+	if (on)
+		termbuf.c_lflag |= EXTPROC;
+	else
+		termbuf.c_lflag &= ~EXTPROC;
+# endif
+#endif	/* TIOCEXT */
+}
+#endif	/* LINEMODE */
+
+	int
+tty_isecho()
+{
+#ifndef USE_TERMIO
+	return (termbuf.sg.sg_flags & ECHO);
+#else
+	return (termbuf.c_lflag & ECHO);
+#endif
+}
+
+	int
+tty_flowmode()
+{
+#ifndef USE_TERMIO
+	return(((termbuf.tc.t_startc) > 0 && (termbuf.tc.t_stopc) > 0) ? 1 : 0);
+#else
+	return((termbuf.c_iflag & IXON) ? 1 : 0);
+#endif
+}
+
+	int
+tty_restartany()
+{
+#ifndef USE_TERMIO
+# ifdef	DECCTQ
+	return((termbuf.lflags & DECCTQ) ? 0 : 1);
+# else
+	return(-1);
+# endif
+#else
+	return((termbuf.c_iflag & IXANY) ? 1 : 0);
+#endif
+}
+
+	void
+tty_setecho(on)
+	int on;
+{
+#ifndef	USE_TERMIO
+	if (on)
+		termbuf.sg.sg_flags |= ECHO|CRMOD;
+	else
+		termbuf.sg.sg_flags &= ~(ECHO|CRMOD);
+#else
+	if (on)
+		termbuf.c_lflag |= ECHO;
+	else
+		termbuf.c_lflag &= ~ECHO;
+#endif
+}
+
+	int
+tty_israw()
+{
+#ifndef USE_TERMIO
+	return(termbuf.sg.sg_flags & RAW);
+#else
+	return(!(termbuf.c_lflag & ICANON));
+#endif
+}
+
+#if	defined (AUTHENTICATION) && defined(NO_LOGIN_F) && defined(LOGIN_R)
+	int
+tty_setraw(on)
+{
+#  ifndef USE_TERMIO
+	if (on)
+		termbuf.sg.sg_flags |= RAW;
+	else
+		termbuf.sg.sg_flags &= ~RAW;
+#  else
+	if (on)
+		termbuf.c_lflag &= ~ICANON;
+	else
+		termbuf.c_lflag |= ICANON;
+#  endif
+}
+#endif
+
+	void
+tty_binaryin(on)
+	int on;
+{
+#ifndef	USE_TERMIO
+	if (on)
+		termbuf.lflags |= LPASS8;
+	else
+		termbuf.lflags &= ~LPASS8;
+#else
+	if (on) {
+		termbuf.c_iflag &= ~ISTRIP;
+	} else {
+		termbuf.c_iflag |= ISTRIP;
+	}
+#endif
+}
+
+	void
+tty_binaryout(on)
+	int on;
+{
+#ifndef	USE_TERMIO
+	if (on)
+		termbuf.lflags |= LLITOUT;
+	else
+		termbuf.lflags &= ~LLITOUT;
+#else
+	if (on) {
+		termbuf.c_cflag &= ~(CSIZE|PARENB);
+		termbuf.c_cflag |= CS8;
+		termbuf.c_oflag &= ~OPOST;
+	} else {
+		termbuf.c_cflag &= ~CSIZE;
+		termbuf.c_cflag |= CS7|PARENB;
+		termbuf.c_oflag |= OPOST;
+	}
+#endif
+}
+
+	int
+tty_isbinaryin()
+{
+#ifndef	USE_TERMIO
+	return(termbuf.lflags & LPASS8);
+#else
+	return(!(termbuf.c_iflag & ISTRIP));
+#endif
+}
+
+	int
+tty_isbinaryout()
+{
+#ifndef	USE_TERMIO
+	return(termbuf.lflags & LLITOUT);
+#else
+	return(!(termbuf.c_oflag&OPOST));
+#endif
+}
+
+#ifdef	LINEMODE
+	int
+tty_isediting()
+{
+#ifndef USE_TERMIO
+	return(!(termbuf.sg.sg_flags & (CBREAK|RAW)));
+#else
+	return(termbuf.c_lflag & ICANON);
+#endif
+}
+
+	int
+tty_istrapsig()
+{
+#ifndef USE_TERMIO
+	return(!(termbuf.sg.sg_flags&RAW));
+#else
+	return(termbuf.c_lflag & ISIG);
+#endif
+}
+
+	void
+tty_setedit(on)
+	int on;
+{
+#ifndef USE_TERMIO
+	if (on)
+		termbuf.sg.sg_flags &= ~CBREAK;
+	else
+		termbuf.sg.sg_flags |= CBREAK;
+#else
+	if (on)
+		termbuf.c_lflag |= ICANON;
+	else
+		termbuf.c_lflag &= ~ICANON;
+#endif
+}
+
+	void
+tty_setsig(on)
+	int on;
+{
+#ifndef	USE_TERMIO
+	if (on)
+		;
+#else
+	if (on)
+		termbuf.c_lflag |= ISIG;
+	else
+		termbuf.c_lflag &= ~ISIG;
+#endif
+}
+#endif	/* LINEMODE */
+
+	int
+tty_issofttab()
+{
+#ifndef	USE_TERMIO
+	return (termbuf.sg.sg_flags & XTABS);
+#else
+# ifdef	OXTABS
+	return (termbuf.c_oflag & OXTABS);
+# endif
+# ifdef	TABDLY
+	return ((termbuf.c_oflag & TABDLY) == TAB3);
+# endif
+#endif
+}
+
+	void
+tty_setsofttab(on)
+	int on;
+{
+#ifndef	USE_TERMIO
+	if (on)
+		termbuf.sg.sg_flags |= XTABS;
+	else
+		termbuf.sg.sg_flags &= ~XTABS;
+#else
+	if (on) {
+# ifdef	OXTABS
+		termbuf.c_oflag |= OXTABS;
+# endif
+# ifdef	TABDLY
+		termbuf.c_oflag &= ~TABDLY;
+		termbuf.c_oflag |= TAB3;
+# endif
+	} else {
+# ifdef	OXTABS
+		termbuf.c_oflag &= ~OXTABS;
+# endif
+# ifdef	TABDLY
+		termbuf.c_oflag &= ~TABDLY;
+		termbuf.c_oflag |= TAB0;
+# endif
+	}
+#endif
+}
+
+	int
+tty_islitecho()
+{
+#ifndef	USE_TERMIO
+	return (!(termbuf.lflags & LCTLECH));
+#else
+# ifdef	ECHOCTL
+	return (!(termbuf.c_lflag & ECHOCTL));
+# endif
+# ifdef	TCTLECH
+	return (!(termbuf.c_lflag & TCTLECH));
+# endif
+# if	!defined(ECHOCTL) && !defined(TCTLECH)
+	return (0);	/* assumes ctl chars are echoed '^x' */
+# endif
+#endif
+}
+
+	void
+tty_setlitecho(on)
+	int on;
+{
+#ifndef	USE_TERMIO
+	if (on)
+		termbuf.lflags &= ~LCTLECH;
+	else
+		termbuf.lflags |= LCTLECH;
+#else
+# ifdef	ECHOCTL
+	if (on)
+		termbuf.c_lflag &= ~ECHOCTL;
+	else
+		termbuf.c_lflag |= ECHOCTL;
+# endif
+# ifdef	TCTLECH
+	if (on)
+		termbuf.c_lflag &= ~TCTLECH;
+	else
+		termbuf.c_lflag |= TCTLECH;
+# endif
+#endif
+}
+
+	int
+tty_iscrnl()
+{
+#ifndef	USE_TERMIO
+	return (termbuf.sg.sg_flags & CRMOD);
+#else
+	return (termbuf.c_iflag & ICRNL);
+#endif
+}
+
+/*
+ * Try to guess whether speeds are "encoded" (4.2BSD) or just numeric (4.4BSD).
+ */
+#if B4800 != 4800
+#define	DECODE_BAUD
+#endif
+
+#ifdef	DECODE_BAUD
+
+/*
+ * A table of available terminal speeds
+ */
+struct termspeeds {
+	int	speed;
+	int	value;
+} termspeeds[] = {
+	{ 0,      B0 },      { 50,    B50 },    { 75,     B75 },
+	{ 110,    B110 },    { 134,   B134 },   { 150,    B150 },
+	{ 200,    B200 },    { 300,   B300 },   { 600,    B600 },
+	{ 1200,   B1200 },   { 1800,  B1800 },  { 2400,   B2400 },
+	{ 4800,   B4800 },
+#ifdef	B7200
+	{ 7200,  B7200 },
+#endif
+	{ 9600,   B9600 },
+#ifdef	B14400
+	{ 14400,  B14400 },
+#endif
+#ifdef	B19200
+	{ 19200,  B19200 },
+#endif
+#ifdef	B28800
+	{ 28800,  B28800 },
+#endif
+#ifdef	B38400
+	{ 38400,  B38400 },
+#endif
+#ifdef	B57600
+	{ 57600,  B57600 },
+#endif
+#ifdef	B115200
+	{ 115200, B115200 },
+#endif
+#ifdef	B230400
+	{ 230400, B230400 },
+#endif
+	{ -1,     0 }
+};
+#endif	/* DECODE_BUAD */
+
+	void
+tty_tspeed(val)
+	int val;
+{
+#ifdef	DECODE_BAUD
+	register struct termspeeds *tp;
+
+	for (tp = termspeeds; (tp->speed != -1) && (val > tp->speed); tp++)
+		;
+	if (tp->speed == -1)	/* back up to last valid value */
+		--tp;
+	cfsetospeed(&termbuf, tp->value);
+#else	/* DECODE_BUAD */
+	cfsetospeed(&termbuf, val);
+#endif	/* DECODE_BUAD */
+}
+
+	void
+tty_rspeed(val)
+	int val;
+{
+#ifdef	DECODE_BAUD
+	register struct termspeeds *tp;
+
+	for (tp = termspeeds; (tp->speed != -1) && (val > tp->speed); tp++)
+		;
+	if (tp->speed == -1)	/* back up to last valid value */
+		--tp;
+	cfsetispeed(&termbuf, tp->value);
+#else	/* DECODE_BAUD */
+	cfsetispeed(&termbuf, val);
+#endif	/* DECODE_BAUD */
+}
+
+#if	defined(CRAY2) && defined(UNICOS5)
+	int
+tty_isnewmap()
+{
+	return((termbuf.c_oflag & OPOST) && (termbuf.c_oflag & ONLCR) &&
+			!(termbuf.c_oflag & ONLRET));
+}
+#endif
+
+#ifdef PARENT_DOES_UTMP
+# ifndef NEWINIT
+extern	struct utmp wtmp;
+extern char wtmpf[];
+# else	/* NEWINIT */
+int	gotalarm;
+
+	/* ARGSUSED */
+	void
+nologinproc(sig)
+	int sig;
+{
+	gotalarm++;
+}
+# endif	/* NEWINIT */
+#endif /* PARENT_DOES_UTMP */
+
+#ifndef	NEWINIT
+# ifdef PARENT_DOES_UTMP
+extern void utmp_sig_init P((void));
+extern void utmp_sig_reset P((void));
+extern void utmp_sig_wait P((void));
+extern void utmp_sig_notify P((int));
+# endif /* PARENT_DOES_UTMP */
+#endif
+
+/*
+ * getptyslave()
+ *
+ * Open the slave side of the pty, and do any initialization
+ * that is necessary.  The return value is a file descriptor
+ * for the slave side.
+ */
+	int
+getptyslave()
+{
+	register int t = -1;
+
+#if	!defined(CRAY) || !defined(NEWINIT)
+# ifdef	LINEMODE
+	int waslm;
+# endif
+# ifdef	TIOCGWINSZ
+	struct winsize ws;
+	extern int def_row, def_col;
+# endif
+	extern int def_tspeed, def_rspeed;
+	/*
+	 * Opening the slave side may cause initilization of the
+	 * kernel tty structure.  We need remember the state of
+	 * 	if linemode was turned on
+	 *	terminal window size
+	 *	terminal speed
+	 * so that we can re-set them if we need to.
+	 */
+# ifdef	LINEMODE
+	waslm = tty_linemode();
+# endif
+
+
+	/*
+	 * Make sure that we don't have a controlling tty, and
+	 * that we are the session (process group) leader.
+	 */
+# ifdef	TIOCNOTTY
+	t = open(_PATH_TTY, O_RDWR);
+	if (t >= 0) {
+		(void) ioctl(t, TIOCNOTTY, (char *)0);
+		(void) close(t);
+	}
+# endif
+
+
+# ifdef PARENT_DOES_UTMP
+	/*
+	 * Wait for our parent to get the utmp stuff to get done.
+	 */
+	utmp_sig_wait();
+# endif
+
+	t = cleanopen(line);
+	if (t < 0)
+		fatalperror(net, line);
+
+#ifdef  STREAMSPTY
+#ifdef	USE_TERMIO
+	ttyfd = t;
+#endif
+	if (ioctl(t, I_PUSH, "ptem") < 0)
+		fatal(net, "I_PUSH ptem");
+	if (ioctl(t, I_PUSH, "ldterm") < 0)
+		fatal(net, "I_PUSH ldterm");
+	if (ioctl(t, I_PUSH, "ttcompat") < 0)
+		fatal(net, "I_PUSH ttcompat");
+	if (ioctl(pty, I_PUSH, "pckt") < 0)
+		fatal(net, "I_PUSH pckt");
+#endif
+
+	/*
+	 * set up the tty modes as we like them to be.
+	 */
+	init_termbuf();
+# ifdef	TIOCGWINSZ
+	if (def_row || def_col) {
+		memset((char *)&ws, 0, sizeof(ws));
+		ws.ws_col = def_col;
+		ws.ws_row = def_row;
+		(void)ioctl(t, TIOCSWINSZ, (char *)&ws);
+	}
+# endif
+
+	/*
+	 * Settings for sgtty based systems
+	 */
+# ifndef	USE_TERMIO
+	termbuf.sg.sg_flags |= CRMOD|ANYP|ECHO|XTABS;
+# endif	/* USE_TERMIO */
+
+	/*
+	 * Settings for UNICOS (and HPUX)
+	 */
+# if defined(CRAY) || defined(__hpux)
+	termbuf.c_oflag = OPOST|ONLCR|TAB3;
+	termbuf.c_iflag = IGNPAR|ISTRIP|ICRNL|IXON;
+	termbuf.c_lflag = ISIG|ICANON|ECHO|ECHOE|ECHOK;
+	termbuf.c_cflag = EXTB|HUPCL|CS8;
+# endif
+
+	/*
+	 * Settings for all other termios/termio based
+	 * systems, other than 4.4BSD.  In 4.4BSD the
+	 * kernel does the initial terminal setup.
+	 */
+# if defined(USE_TERMIO) && !(defined(CRAY) || defined(__hpux)) && (BSD <= 43)
+#  ifndef	OXTABS
+#   define OXTABS	0
+#  endif
+	termbuf.c_lflag |= ECHO;
+	termbuf.c_oflag |= ONLCR|OXTABS;
+	termbuf.c_iflag |= ICRNL;
+	termbuf.c_iflag &= ~IXOFF;
+# endif /* defined(USE_TERMIO) && !defined(CRAY) && (BSD <= 43) */
+	tty_rspeed((def_rspeed > 0) ? def_rspeed : 9600);
+	tty_tspeed((def_tspeed > 0) ? def_tspeed : 9600);
+# ifdef	LINEMODE
+	if (waslm)
+		tty_setlinemode(1);
+# endif	/* LINEMODE */
+
+	/*
+	 * Set the tty modes, and make this our controlling tty.
+	 */
+	set_termbuf();
+	if (login_tty(t) == -1)
+		fatalperror(net, "login_tty");
+#endif	/* !defined(CRAY) || !defined(NEWINIT) */
+	if (net > 2)
+		(void) close(net);
+#if	defined(AUTHENTICATION) && defined(NO_LOGIN_F) && defined(LOGIN_R)
+	/*
+	 * Leave the pty open so that we can write out the rlogin
+	 * protocol for /bin/login, if the authentication works.
+	 */
+#else
+	if (pty > 2) {
+		(void) close(pty);
+		pty = -1;
+	}
+#endif
+}
+
+#if	!defined(CRAY) || !defined(NEWINIT)
+#ifndef	O_NOCTTY
+#define	O_NOCTTY	0
+#endif
+/*
+ * Open the specified slave side of the pty,
+ * making sure that we have a clean tty.
+ */
+	int
+cleanopen(line)
+	char *line;
+{
+	register int t;
+#ifdef	UNICOS7x
+	struct secstat secbuf;
+#endif	/* UNICOS7x */
+
+#ifndef STREAMSPTY
+	/*
+	 * Make sure that other people can't open the
+	 * slave side of the connection.
+	 */
+	(void) chown(line, 0, 0);
+	(void) chmod(line, 0600);
+#endif
+
+# if !defined(CRAY) && (BSD > 43)
+	(void) revoke(line);
+# endif
+#ifdef	UNICOS7x
+	if (secflag) {
+		if (secstat(line, &secbuf) < 0)
+			return(-1);
+		if (setulvl(secbuf.st_slevel) < 0)
+			return(-1);
+		if (setucmp(secbuf.st_compart) < 0)
+			return(-1);
+	}
+#endif	/* UNICOS7x */
+
+	t = open(line, O_RDWR|O_NOCTTY);
+
+#ifdef	UNICOS7x
+	if (secflag) {
+		if (setulvl(sysv.sy_minlvl) < 0)
+			return(-1);
+		if (setucmp(0) < 0)
+			return(-1);
+	}
+#endif	/* UNICOS7x */
+
+	if (t < 0)
+		return(-1);
+
+	/*
+	 * Hangup anybody else using this ttyp, then reopen it for
+	 * ourselves.
+	 */
+# if !(defined(CRAY) || defined(__hpux)) && (BSD <= 43) && !defined(STREAMSPTY)
+	(void) signal(SIGHUP, SIG_IGN);
+	vhangup();
+	(void) signal(SIGHUP, SIG_DFL);
+	t = open(line, O_RDWR|O_NOCTTY);
+	if (t < 0)
+		return(-1);
+# endif
+# if	defined(CRAY) && defined(TCVHUP)
+	{
+		register int i;
+		(void) signal(SIGHUP, SIG_IGN);
+		(void) ioctl(t, TCVHUP, (char *)0);
+		(void) signal(SIGHUP, SIG_DFL);
+
+#ifdef	UNICOS7x
+		if (secflag) {
+			if (secstat(line, &secbuf) < 0)
+				return(-1);
+			if (setulvl(secbuf.st_slevel) < 0)
+				return(-1);
+			if (setucmp(secbuf.st_compart) < 0)
+				return(-1);
+		}
+#endif	/* UNICOS7x */
+
+		i = open(line, O_RDWR);
+
+#ifdef	UNICOS7x
+		if (secflag) {
+			if (setulvl(sysv.sy_minlvl) < 0)
+				return(-1);
+			if (setucmp(0) < 0)
+				return(-1);
+		}
+#endif	/* UNICOS7x */
+
+		if (i < 0)
+			return(-1);
+		(void) close(t);
+		t = i;
+	}
+# endif	/* defined(CRAY) && defined(TCVHUP) */
+	return(t);
+}
+#endif	/* !defined(CRAY) || !defined(NEWINIT) */
+
+#if BSD <= 43
+
+	int
+login_tty(t)
+	int t;
+{
+	if (setsid() < 0) {
+#ifdef ultrix
+		/*
+		 * The setsid() may have failed because we
+		 * already have a pgrp == pid.  Zero out
+		 * our pgrp and try again...
+		 */
+		if ((setpgrp(0, 0) < 0) || (setsid() < 0))
+#endif
+			fatalperror(net, "setsid()");
+	}
+# ifdef	TIOCSCTTY
+	if (ioctl(t, TIOCSCTTY, (char *)0) < 0)
+		fatalperror(net, "ioctl(sctty)");
+#  if defined(CRAY)
+	/*
+	 * Close the hard fd to /dev/ttypXXX, and re-open through
+	 * the indirect /dev/tty interface.
+	 */
+	close(t);
+	if ((t = open("/dev/tty", O_RDWR)) < 0)
+		fatalperror(net, "open(/dev/tty)");
+#  endif
+# else
+	/*
+	 * We get our controlling tty assigned as a side-effect
+	 * of opening up a tty device.  But on BSD based systems,
+	 * this only happens if our process group is zero.  The
+	 * setsid() call above may have set our pgrp, so clear
+	 * it out before opening the tty...
+	 */
+#  ifndef SOLARIS
+	(void) setpgrp(0, 0);
+#  else
+	(void) setpgrp();
+#  endif
+	close(open(line, O_RDWR));
+# endif
+	if (t != 0)
+		(void) dup2(t, 0);
+	if (t != 1)
+		(void) dup2(t, 1);
+	if (t != 2)
+		(void) dup2(t, 2);
+	if (t > 2)
+		close(t);
+	return(0);
+}
+#endif	/* BSD <= 43 */
+
+#ifdef	NEWINIT
+char *gen_id = "fe";
+#endif
+
+/*
+ * startslave(host)
+ *
+ * Given a hostname, do whatever
+ * is necessary to startup the login process on the slave side of the pty.
+ */
+
+/* ARGSUSED */
+	void
+startslave(host, autologin, autoname)
+	char *host;
+	int autologin;
+	char *autoname;
+{
+	register int i;
+	long time();
+	char name[256];
+#ifdef	NEWINIT
+	extern char *ptyip;
+	struct init_request request;
+	void nologinproc();
+	register int n;
+#endif	/* NEWINIT */
+
+#if	defined(AUTHENTICATION)
+	if (!autoname || !autoname[0])
+		autologin = 0;
+
+	if (autologin < auth_level) {
+		fatal(net, "Authorization failed");
+		exit(1);
+	}
+#endif
+
+#ifndef	NEWINIT
+# ifdef	PARENT_DOES_UTMP
+	utmp_sig_init();
+# endif	/* PARENT_DOES_UTMP */
+
+	if ((i = fork()) < 0)
+		fatalperror(net, "fork");
+	if (i) {
+# ifdef PARENT_DOES_UTMP
+		/*
+		 * Cray parent will create utmp entry for child and send
+		 * signal to child to tell when done.  Child waits for signal
+		 * before doing anything important.
+		 */
+		register int pid = i;
+		void sigjob P((int));
+
+		setpgrp();
+		utmp_sig_reset();		/* reset handler to default */
+		/*
+		 * Create utmp entry for child
+		 */
+		(void) time(&wtmp.ut_time);
+		wtmp.ut_type = LOGIN_PROCESS;
+		wtmp.ut_pid = pid;
+		SCPYN(wtmp.ut_user, "LOGIN");
+		SCPYN(wtmp.ut_host, host);
+		SCPYN(wtmp.ut_line, line + sizeof("/dev/") - 1);
+#ifndef	__hpux
+		SCPYN(wtmp.ut_id, wtmp.ut_line+3);
+#else
+		SCPYN(wtmp.ut_id, wtmp.ut_line+7);
+#endif
+		pututline(&wtmp);
+		endutent();
+		if ((i = open(wtmpf, O_WRONLY|O_APPEND)) >= 0) {
+			(void) write(i, (char *)&wtmp, sizeof(struct utmp));
+			(void) close(i);
+		}
+#ifdef	CRAY
+		(void) signal(WJSIGNAL, sigjob);
+#endif
+		utmp_sig_notify(pid);
+# endif	/* PARENT_DOES_UTMP */
+	} else {
+		getptyslave(autologin);
+		start_login(host, autologin, autoname);
+		/*NOTREACHED*/
+	}
+#else	/* NEWINIT */
+
+	/*
+	 * Init will start up login process if we ask nicely.  We only wait
+	 * for it to start up and begin normal telnet operation.
+	 */
+	if ((i = open(INIT_FIFO, O_WRONLY)) < 0) {
+		char tbuf[128];
+		(void) sprintf(tbuf, "Can't open %s\n", INIT_FIFO);
+		fatalperror(net, tbuf);
+	}
+	memset((char *)&request, 0, sizeof(request));
+	request.magic = INIT_MAGIC;
+	SCPYN(request.gen_id, gen_id);
+	SCPYN(request.tty_id, &line[8]);
+	SCPYN(request.host, host);
+	SCPYN(request.term_type, terminaltype ? terminaltype : "network");
+#if	!defined(UNICOS5)
+	request.signal = SIGCLD;
+	request.pid = getpid();
+#endif
+#ifdef BFTPDAEMON
+	/*
+	 * Are we working as the bftp daemon?
+	 */
+	if (bftpd) {
+		SCPYN(request.exec_name, BFTPPATH);
+	}
+#endif /* BFTPDAEMON */
+	if (write(i, (char *)&request, sizeof(request)) < 0) {
+		char tbuf[128];
+		(void) sprintf(tbuf, "Can't write to %s\n", INIT_FIFO);
+		fatalperror(net, tbuf);
+	}
+	(void) close(i);
+	(void) signal(SIGALRM, nologinproc);
+	for (i = 0; ; i++) {
+		char tbuf[128];
+		alarm(15);
+		n = read(pty, ptyip, BUFSIZ);
+		if (i == 3 || n >= 0 || !gotalarm)
+			break;
+		gotalarm = 0;
+		sprintf(tbuf, "telnetd: waiting for /etc/init to start login process on %s\r\n", line);
+		(void) write(net, tbuf, strlen(tbuf));
+	}
+	if (n < 0 && gotalarm)
+		fatal(net, "/etc/init didn't start login process");
+	pcc += n;
+	alarm(0);
+	(void) signal(SIGALRM, SIG_DFL);
+
+	return;
+#endif	/* NEWINIT */
+}
+
+char	*envinit[3];
+extern char **environ;
+
+	void
+init_env()
+{
+	extern char *getenv();
+	char **envp;
+
+	envp = envinit;
+	if (*envp = getenv("TZ"))
+		*envp++ -= 3;
+#if	defined(CRAY) || defined(__hpux)
+	else
+		*envp++ = "TZ=GMT0";
+#endif
+	*envp = 0;
+	environ = envinit;
+}
+
+#ifndef	NEWINIT
+
+/*
+ * start_login(host)
+ *
+ * Assuming that we are now running as a child processes, this
+ * function will turn us into the login process.
+ */
+
+	void
+start_login(host, autologin, name)
+	char *host;
+	int autologin;
+	char *name;
+{
+	register char *cp;
+	register char **argv;
+	char **addarg();
+	extern char *getenv();
+#ifdef	UTMPX
+	register int pid = getpid();
+	struct utmpx utmpx;
+#endif
+#ifdef SOLARIS
+	char *term;
+	char termbuf[64];
+#endif
+
+#ifdef	UTMPX
+	/*
+	 * Create utmp entry for child
+	 */
+
+	memset(&utmpx, 0, sizeof(utmpx));
+	SCPYN(utmpx.ut_user, ".telnet");
+	SCPYN(utmpx.ut_line, line + sizeof("/dev/") - 1);
+	utmpx.ut_pid = pid;
+	utmpx.ut_id[0] = 't';
+	utmpx.ut_id[1] = 'n';
+	utmpx.ut_id[2] = SC_WILDC;
+	utmpx.ut_id[3] = SC_WILDC;
+	utmpx.ut_type = LOGIN_PROCESS;
+	(void) time(&utmpx.ut_tv.tv_sec);
+	if (makeutx(&utmpx) == NULL)
+		fatal(net, "makeutx failed");
+#endif
+
+	scrub_env();
+
+	/*
+	 * -h : pass on name of host.
+	 *		WARNING:  -h is accepted by login if and only if
+	 *			getuid() == 0.
+	 * -p : don't clobber the environment (so terminal type stays set).
+	 *
+	 * -f : force this login, he has already been authenticated
+	 */
+	argv = addarg(0, "login");
+
+#if	!defined(NO_LOGIN_H)
+
+# if	defined (AUTHENTICATION) && defined(NO_LOGIN_F) && defined(LOGIN_R)
+	/*
+	 * Don't add the "-h host" option if we are going
+	 * to be adding the "-r host" option down below...
+	 */
+	if ((auth_level < 0) || (autologin != AUTH_VALID))
+# endif
+	{
+		argv = addarg(argv, "-h");
+		argv = addarg(argv, host);
+#ifdef	SOLARIS
+		/*
+		 * SVR4 version of -h takes TERM= as second arg, or -
+		 */
+		term = getenv("TERM");
+		if (term == NULL || term[0] == 0) {
+			term = "-";
+		} else {
+			strcpy(termbuf, "TERM=");
+			strncat(termbuf, term, sizeof(termbuf) - 6);
+			term = termbuf;
+		}
+		argv = addarg(argv, term);
+#endif
+	}
+#endif
+#if	!defined(NO_LOGIN_P)
+	argv = addarg(argv, "-p");
+#endif
+#ifdef	LINEMODE
+	/*
+	 * Set the environment variable "LINEMODE" to either
+	 * "real" or "kludge" if we are operating in either
+	 * real or kludge linemode.
+	 */
+	if (lmodetype == REAL_LINEMODE)
+		setenv("LINEMODE", "real", 1);
+# ifdef KLUDGELINEMODE
+	else if (lmodetype == KLUDGE_LINEMODE || lmodetype == KLUDGE_OK)
+		setenv("LINEMODE", "kludge", 1);
+# endif
+#endif
+#ifdef	BFTPDAEMON
+	/*
+	 * Are we working as the bftp daemon?  If so, then ask login
+	 * to start bftp instead of shell.
+	 */
+	if (bftpd) {
+		argv = addarg(argv, "-e");
+		argv = addarg(argv, BFTPPATH);
+	} else
+#endif
+#if	defined (SecurID)
+	/*
+	 * don't worry about the -f that might get sent.
+	 * A -s is supposed to override it anyhow.
+	 */
+	if (require_SecurID)
+		argv = addarg(argv, "-s");
+#endif
+#if	defined (AUTHENTICATION)
+	if (auth_level >= 0 && autologin == AUTH_VALID) {
+# if	!defined(NO_LOGIN_F)
+		argv = addarg(argv, "-f");
+		argv = addarg(argv, name);
+# else
+#  if defined(LOGIN_R)
+		/*
+		 * We don't have support for "login -f", but we
+		 * can fool /bin/login into thinking that we are
+		 * rlogind, and allow us to log in without a
+		 * password.  The rlogin protocol expects
+		 *	local-user\0remote-user\0term/speed\0
+		 */
+
+		if (pty > 2) {
+			register char *cp;
+			char speed[128];
+			int isecho, israw, xpty, len;
+			extern int def_rspeed;
+#  ifndef LOGIN_HOST
+			/*
+			 * Tell login that we are coming from "localhost".
+			 * If we passed in the real host name, then the
+			 * user would have to allow .rhost access from
+			 * every machine that they want authenticated
+			 * access to work from, which sort of defeats
+			 * the purpose of an authenticated login...
+			 * So, we tell login that the session is coming
+			 * from "localhost", and the user will only have
+			 * to have "localhost" in their .rhost file.
+			 */
+#			define LOGIN_HOST "localhost"
+#  endif
+			argv = addarg(argv, "-r");
+			argv = addarg(argv, LOGIN_HOST);
+
+			xpty = pty;
+# ifndef  STREAMSPTY
+			pty = 0;
+# else
+			ttyfd = 0;
+# endif
+			init_termbuf();
+			isecho = tty_isecho();
+			israw = tty_israw();
+			if (isecho || !israw) {
+				tty_setecho(0);		/* Turn off echo */
+				tty_setraw(1);		/* Turn on raw */
+				set_termbuf();
+			}
+			len = strlen(name)+1;
+			write(xpty, name, len);
+			write(xpty, name, len);
+			sprintf(speed, "%s/%d", (cp = getenv("TERM")) ? cp : "",
+				(def_rspeed > 0) ? def_rspeed : 9600);
+			len = strlen(speed)+1;
+			write(xpty, speed, len);
+
+			if (isecho || !israw) {
+				init_termbuf();
+				tty_setecho(isecho);
+				tty_setraw(israw);
+				set_termbuf();
+				if (!israw) {
+					/*
+					 * Write a newline to ensure
+					 * that login will be able to
+					 * read the line...
+					 */
+					write(xpty, "\n", 1);
+				}
+			}
+			pty = xpty;
+		}
+#  else
+		argv = addarg(argv, name);
+#  endif
+# endif
+	} else
+#endif
+	if (getenv("USER")) {
+		argv = addarg(argv, getenv("USER"));
+#if	defined(LOGIN_ARGS) && defined(NO_LOGIN_P)
+		{
+			register char **cpp;
+			for (cpp = environ; *cpp; cpp++)
+				argv = addarg(argv, *cpp);
+		}
+#endif
+		/*
+		 * Assume that login will set the USER variable
+		 * correctly.  For SysV systems, this means that
+		 * USER will no longer be set, just LOGNAME by
+		 * login.  (The problem is that if the auto-login
+		 * fails, and the user then specifies a different
+		 * account name, he can get logged in with both
+		 * LOGNAME and USER in his environment, but the
+		 * USER value will be wrong.
+		 */
+		unsetenv("USER");
+	}
+#ifdef	SOLARIS
+	else {
+		char **p;
+
+		argv = addarg(argv, "");	/* no login name */
+		for (p = environ; *p; p++) {
+			argv = addarg(argv, *p);
+		}
+	}
+#endif	/* SOLARIS */
+#if	defined(AUTHENTICATION) && defined(NO_LOGIN_F) && defined(LOGIN_R)
+	if (pty > 2)
+		close(pty);
+#endif
+	closelog();
+	/*
+	 * This sleep(1) is in here so that telnetd can
+	 * finish up with the tty.  There's a race condition
+	 * the login banner message gets lost...
+	 */
+	sleep(1);
+	execv(_PATH_LOGIN, argv);
+
+	syslog(LOG_ERR, "%s: %m\n", _PATH_LOGIN);
+	fatalperror(net, _PATH_LOGIN);
+	/*NOTREACHED*/
+}
+
+	char **
+addarg(argv, val)
+	register char **argv;
+	register char *val;
+{
+	register char **cpp;
+
+	if (argv == NULL) {
+		/*
+		 * 10 entries, a leading length, and a null
+		 */
+		argv = (char **)malloc(sizeof(*argv) * 12);
+		if (argv == NULL)
+			return(NULL);
+		*argv++ = (char *)10;
+		*argv = (char *)0;
+	}
+	for (cpp = argv; *cpp; cpp++)
+		;
+	if (cpp == &argv[(int)argv[-1]]) {
+		--argv;
+		*argv = (char *)((int)(*argv) + 10);
+		argv = (char **)realloc(argv, sizeof(*argv)*((int)(*argv) + 2));
+		if (argv == NULL)
+			return(NULL);
+		argv++;
+		cpp = &argv[(int)argv[-1] - 10];
+	}
+	*cpp++ = val;
+	*cpp = 0;
+	return(argv);
+}
+#endif	/* NEWINIT */
+
+/*
+ * scrub_env()
+ *
+ * Remove a few things from the environment that
+ * don't need to be there.
+ */
+scrub_env()
+{
+	register char **cpp, **cpp2;
+
+	for (cpp2 = cpp = environ; *cpp; cpp++) {
+		if (strncmp(*cpp, "LD_", 3) &&
+		    strncmp(*cpp, "_RLD_", 5) &&
+		    strncmp(*cpp, "LIBPATH=", 8) &&
+		    strncmp(*cpp, "IFS=", 4))
+			*cpp2++ = *cpp;
+	}
+	*cpp2 = 0;
+}
+
+/*
+ * cleanup()
+ *
+ * This is the routine to call when we are all through, to
+ * clean up anything that needs to be cleaned up.
+ */
+	/* ARGSUSED */
+	void
+cleanup(sig)
+	int sig;
+{
+#ifndef	PARENT_DOES_UTMP
+# if (BSD > 43) || defined(convex)
+	char *p;
+
+	p = line + sizeof("/dev/") - 1;
+	if (logout(p))
+		logwtmp(p, "", "");
+	(void)chmod(line, 0666);
+	(void)chown(line, 0, 0);
+	*p = 'p';
+	(void)chmod(line, 0666);
+	(void)chown(line, 0, 0);
+	(void) shutdown(net, 2);
+	exit(1);
+# else
+	void rmut();
+
+	rmut();
+	vhangup();	/* XXX */
+	(void) shutdown(net, 2);
+	exit(1);
+# endif
+#else	/* PARENT_DOES_UTMP */
+# ifdef	NEWINIT
+	(void) shutdown(net, 2);
+	exit(1);
+# else	/* NEWINIT */
+#  ifdef CRAY
+	static int incleanup = 0;
+	register int t;
+	int child_status; /* status of child process as returned by waitpid */
+	int flags = WNOHANG|WUNTRACED;
+
+	/*
+	 * 1: Pick up the zombie, if we are being called
+	 *    as the signal handler.
+	 * 2: If we are a nested cleanup(), return.
+	 * 3: Try to clean up TMPDIR.
+	 * 4: Fill in utmp with shutdown of process.
+	 * 5: Close down the network and pty connections.
+	 * 6: Finish up the TMPDIR cleanup, if needed.
+	 */
+	if (sig == SIGCHLD) {
+		while (waitpid(-1, &child_status, flags) > 0)
+			;	/* VOID */
+		/* Check if the child process was stopped
+		 * rather than exited.  We want cleanup only if
+		 * the child has died.
+		 */
+		if (WIFSTOPPED(child_status)) {
+			return;
+		}
+	}
+	t = sigblock(sigmask(SIGCHLD));
+	if (incleanup) {
+		sigsetmask(t);
+		return;
+	}
+	incleanup = 1;
+	sigsetmask(t);
+#ifdef	UNICOS7x
+	if (secflag) {
+		/*
+		 *	We need to set ourselves back to a null
+		 *	label to clean up.
+		 */
+
+		setulvl(sysv.sy_minlvl);
+		setucmp((long)0);
+	}
+#endif	/* UNICOS7x */
+
+	t = cleantmp(&wtmp);
+	setutent();	/* just to make sure */
+#  endif /* CRAY */
+	rmut(line);
+	close(pty);
+	(void) shutdown(net, 2);
+#  ifdef CRAY
+	if (t == 0)
+		cleantmp(&wtmp);
+#  endif /* CRAY */
+	exit(1);
+# endif	/* NEWINT */
+#endif	/* PARENT_DOES_UTMP */
+}
+
+#if defined(PARENT_DOES_UTMP) && !defined(NEWINIT)
+/*
+ * _utmp_sig_rcv
+ * utmp_sig_init
+ * utmp_sig_wait
+ *	These three functions are used to coordinate the handling of
+ *	the utmp file between the server and the soon-to-be-login shell.
+ *	The server actually creates the utmp structure, the child calls
+ *	utmp_sig_wait(), until the server calls utmp_sig_notify() and
+ *	signals the future-login shell to proceed.
+ */
+static int caught=0;		/* NZ when signal intercepted */
+static void (*func)();		/* address of previous handler */
+
+	void
+_utmp_sig_rcv(sig)
+	int sig;
+{
+	caught = 1;
+	(void) signal(SIGUSR1, func);
+}
+
+	void
+utmp_sig_init()
+{
+	/*
+	 * register signal handler for UTMP creation
+	 */
+	if ((int)(func = signal(SIGUSR1, _utmp_sig_rcv)) == -1)
+		fatalperror(net, "telnetd/signal");
+}
+
+	void
+utmp_sig_reset()
+{
+	(void) signal(SIGUSR1, func);	/* reset handler to default */
+}
+
+# ifdef __hpux
+# define sigoff() /* do nothing */
+# define sigon() /* do nothing */
+# endif
+
+	void
+utmp_sig_wait()
+{
+	/*
+	 * Wait for parent to write our utmp entry.
+	 */
+	sigoff();
+	while (caught == 0) {
+		pause();	/* wait until we get a signal (sigon) */
+		sigoff();	/* turn off signals while we check caught */
+	}
+	sigon();		/* turn on signals again */
+}
+
+	void
+utmp_sig_notify(pid)
+{
+	kill(pid, SIGUSR1);
+}
+
+# ifdef CRAY
+static int gotsigjob = 0;
+
+	/*ARGSUSED*/
+	void
+sigjob(sig)
+	int sig;
+{
+	register int jid;
+	register struct jobtemp *jp;
+
+	while ((jid = waitjob(NULL)) != -1) {
+		if (jid == 0) {
+			return;
+		}
+		gotsigjob++;
+		jobend(jid, NULL, NULL);
+	}
+}
+
+/*
+ *	jid_getutid:
+ *		called by jobend() before calling cleantmp()
+ *		to find the correct $TMPDIR to cleanup.
+ */
+
+	struct utmp *
+jid_getutid(jid)
+	int jid;
+{
+	struct utmp *cur = NULL;
+
+	setutent();	/* just to make sure */
+	while (cur = getutent()) {
+		if ( (cur->ut_type != NULL) && (jid == cur->ut_jid) ) {
+			return(cur);
+		}
+	}
+
+	return(0);
+}
+
+/*
+ * Clean up the TMPDIR that login created.
+ * The first time this is called we pick up the info
+ * from the utmp.  If the job has already gone away,
+ * then we'll clean up and be done.  If not, then
+ * when this is called the second time it will wait
+ * for the signal that the job is done.
+ */
+	int
+cleantmp(wtp)
+	register struct utmp *wtp;
+{
+	struct utmp *utp;
+	static int first = 1;
+	register int mask, omask, ret;
+	extern struct utmp *getutid P((const struct utmp *_Id));
+
+
+	mask = sigmask(WJSIGNAL);
+
+	if (first == 0) {
+		omask = sigblock(mask);
+		while (gotsigjob == 0)
+			sigpause(omask);
+		return(1);
+	}
+	first = 0;
+	setutent();	/* just to make sure */
+
+	utp = getutid(wtp);
+	if (utp == 0) {
+		syslog(LOG_ERR, "Can't get /etc/utmp entry to clean TMPDIR");
+		return(-1);
+	}
+	/*
+	 * Nothing to clean up if the user shell was never started.
+	 */
+	if (utp->ut_type != USER_PROCESS || utp->ut_jid == 0)
+		return(1);
+
+	/*
+	 * Block the WJSIGNAL while we are in jobend().
+	 */
+	omask = sigblock(mask);
+	ret = jobend(utp->ut_jid, utp->ut_tpath, utp->ut_user);
+	sigsetmask(omask);
+	return(ret);
+}
+
+	int
+jobend(jid, path, user)
+	register int jid;
+	register char *path;
+	register char *user;
+{
+	static int saved_jid = 0;
+	static int pty_saved_jid = 0;
+	static char saved_path[sizeof(wtmp.ut_tpath)+1];
+	static char saved_user[sizeof(wtmp.ut_user)+1];
+
+	/*
+	 * this little piece of code comes into play
+	 * only when ptyreconnect is used to reconnect
+	 * to an previous session.
+	 *
+	 * this is the only time when the
+	 * "saved_jid != jid" code is executed.
+	 */
+
+	if ( saved_jid && saved_jid != jid ) {
+		if (!path) {	/* called from signal handler */
+			pty_saved_jid = jid;
+		} else {
+			pty_saved_jid = saved_jid;
+		}
+	}
+
+	if (path) {
+		strncpy(saved_path, path, sizeof(wtmp.ut_tpath));
+		strncpy(saved_user, user, sizeof(wtmp.ut_user));
+		saved_path[sizeof(saved_path)] = '\0';
+		saved_user[sizeof(saved_user)] = '\0';
+	}
+	if (saved_jid == 0) {
+		saved_jid = jid;
+		return(0);
+	}
+
+	/* if the jid has changed, get the correct entry from the utmp file */
+
+	if ( saved_jid != jid ) {
+		struct utmp *utp = NULL;
+		struct utmp *jid_getutid();
+
+		utp = jid_getutid(pty_saved_jid);
+
+		if (utp == 0) {
+			syslog(LOG_ERR, "Can't get /etc/utmp entry to clean TMPDIR");
+			return(-1);
+		}
+
+		cleantmpdir(jid, utp->ut_tpath, utp->ut_user);
+		return(1);
+	}
+
+	cleantmpdir(jid, saved_path, saved_user);
+	return(1);
+}
+
+/*
+ * Fork a child process to clean up the TMPDIR
+ */
+cleantmpdir(jid, tpath, user)
+	register int jid;
+	register char *tpath;
+	register char *user;
+{
+	switch(fork()) {
+	case -1:
+		syslog(LOG_ERR, "TMPDIR cleanup(%s): fork() failed: %m\n",
+							tpath);
+		break;
+	case 0:
+		execl(CLEANTMPCMD, CLEANTMPCMD, user, tpath, 0);
+		syslog(LOG_ERR, "TMPDIR cleanup(%s): execl(%s) failed: %m\n",
+							tpath, CLEANTMPCMD);
+		exit(1);
+	default:
+		/*
+		 * Forget about child.  We will exit, and
+		 * /etc/init will pick it up.
+		 */
+		break;
+	}
+}
+# endif /* CRAY */
+#endif	/* defined(PARENT_DOES_UTMP) && !defined(NEWINIT) */
+
+/*
+ * rmut()
+ *
+ * This is the function called by cleanup() to
+ * remove the utmp entry for this person.
+ */
+
+#ifdef	UTMPX
+	void
+rmut()
+{
+	register f;
+	int found = 0;
+	struct utmp *u, *utmp;
+	int nutmp;
+	struct stat statbf;
+
+	struct utmpx *utxp, utmpx;
+
+	/*
+	 * This updates the utmpx and utmp entries and make a wtmp/x entry
+	 */
+
+	SCPYN(utmpx.ut_line, line + sizeof("/dev/") - 1);
+	utxp = getutxline(&utmpx);
+	if (utxp) {
+		utxp->ut_type = DEAD_PROCESS;
+		utxp->ut_exit.e_termination = 0;
+		utxp->ut_exit.e_exit = 0;
+		(void) time(&utmpx.ut_tv.tv_sec);
+		utmpx.ut_tv.tv_usec = 0;
+		modutx(utxp);
+	}
+	endutxent();
+}  /* end of rmut */
+#endif
+
+#if	!defined(UTMPX) && !(defined(CRAY) || defined(__hpux)) && BSD <= 43
+	void
+rmut()
+{
+	register f;
+	int found = 0;
+	struct utmp *u, *utmp;
+	int nutmp;
+	struct stat statbf;
+
+	f = open(utmpf, O_RDWR);
+	if (f >= 0) {
+		(void) fstat(f, &statbf);
+		utmp = (struct utmp *)malloc((unsigned)statbf.st_size);
+		if (!utmp)
+			syslog(LOG_ERR, "utmp malloc failed");
+		if (statbf.st_size && utmp) {
+			nutmp = read(f, (char *)utmp, (int)statbf.st_size);
+			nutmp /= sizeof(struct utmp);
+
+			for (u = utmp ; u < &utmp[nutmp] ; u++) {
+				if (SCMPN(u->ut_line, line+5) ||
+				    u->ut_name[0]==0)
+					continue;
+				(void) lseek(f, ((long)u)-((long)utmp), L_SET);
+				SCPYN(u->ut_name, "");
+				SCPYN(u->ut_host, "");
+				(void) time(&u->ut_time);
+				(void) write(f, (char *)u, sizeof(wtmp));
+				found++;
+			}
+		}
+		(void) close(f);
+	}
+	if (found) {
+		f = open(wtmpf, O_WRONLY|O_APPEND);
+		if (f >= 0) {
+			SCPYN(wtmp.ut_line, line+5);
+			SCPYN(wtmp.ut_name, "");
+			SCPYN(wtmp.ut_host, "");
+			(void) time(&wtmp.ut_time);
+			(void) write(f, (char *)&wtmp, sizeof(wtmp));
+			(void) close(f);
+		}
+	}
+	(void) chmod(line, 0666);
+	(void) chown(line, 0, 0);
+	line[strlen("/dev/")] = 'p';
+	(void) chmod(line, 0666);
+	(void) chown(line, 0, 0);
+}  /* end of rmut */
+#endif	/* CRAY */
+
+#ifdef __hpux
+rmut (line)
+char *line;
+{
+	struct utmp utmp;
+	struct utmp *utptr;
+	int fd;			/* for /etc/wtmp */
+
+	utmp.ut_type = USER_PROCESS;
+	(void) strncpy(utmp.ut_id, line+12, sizeof(utmp.ut_id));
+	(void) setutent();
+	utptr = getutid(&utmp);
+	/* write it out only if it exists */
+	if (utptr) {
+		utptr->ut_type = DEAD_PROCESS;
+		utptr->ut_time = time((long *) 0);
+		(void) pututline(utptr);
+		/* set wtmp entry if wtmp file exists */
+		if ((fd = open(wtmpf, O_WRONLY | O_APPEND)) >= 0) {
+			(void) write(fd, utptr, sizeof(utmp));
+			(void) close(fd);
+		}
+	}
+	(void) endutent();
+
+	(void) chmod(line, 0666);
+	(void) chown(line, 0, 0);
+	line[14] = line[13];
+	line[13] = line[12];
+	line[8] = 'm';
+	line[9] = '/';
+	line[10] = 'p';
+	line[11] = 't';
+	line[12] = 'y';
+	(void) chmod(line, 0666);
+	(void) chown(line, 0, 0);
+}
+#endif
diff --git a/contrib/telnet/telnetd/telnetd.8 b/contrib/telnet/telnetd/telnetd.8
new file mode 100644
index 0000000..f618385
--- /dev/null
+++ b/contrib/telnet/telnetd/telnetd.8
@@ -0,0 +1,607 @@
+.\" Copyright (c) 1983, 1993
+.\"	The Regents of the University of California.  All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"	This product includes software developed by the University of
+.\"	California, Berkeley and its contributors.
+.\" 4. Neither the name of the University nor the names of its contributors
+.\"    may be used to endorse or promote products derived from this software
+.\"    without specific prior written permission.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\"	@(#)telnetd.8	8.4 (Berkeley) 6/1/94
+.\"
+.Dd June 1, 1994
+.Dt TELNETD 8
+.Os BSD 4.2
+.Sh NAME
+.Nm telnetd
+.Nd DARPA
+.Tn TELNET
+protocol server
+.Sh SYNOPSIS
+.Nm /usr/libexec/telnetd
+.Op Fl BUhlkns
+.Op Fl D Ar debugmode
+.Op Fl I Ns Ar initid
+.Op Fl S Ar tos
+.Op Fl X Ar authtype
+.Op Fl a Ar authmode
+.Op Fl edebug
+.Op Fl r Ns Ar lowpty-highpty
+.Op Fl u Ar len
+.Op Fl debug Op Ar port
+.Sh DESCRIPTION
+The
+.Nm telnetd
+command is a server which supports the
+.Tn DARPA
+standard
+.Tn TELNET
+virtual terminal protocol.
+.Nm Telnetd
+is normally invoked by the internet server (see
+.Xr inetd 8 )
+for requests to connect to the
+.Tn TELNET
+port as indicated by the
+.Pa /etc/services
+file (see
+.Xr services 5 ) .
+The
+.Fl debug
+option may be used to start up
+.Nm telnetd
+manually, instead of through
+.Xr inetd 8 .
+If started up this way, 
+.Ar port
+may be specified to run
+.Nm telnetd
+on an alternate
+.Tn TCP
+port number.
+.Pp
+The
+.Nm telnetd
+command accepts the following options:
+.Bl -tag -width "-a authmode"
+.It Fl a Ar authmode
+This option may be used for specifying what mode should
+be used for authentication.
+Note that this option is only useful if
+.Nm telnetd
+has been compiled with support for the
+.Dv AUTHENTICATION
+option.
+There are several valid values for
+.Ar authmode:
+.Bl -tag -width debug
+.It debug
+Turns on authentication debugging code.
+.It user
+Only allow connections when the remote user
+can provide valid authentication information
+to identify the remote user,
+and is allowed access to the specified account
+without providing a password.
+.It valid
+Only allow connections when the remote user
+can provide valid authentication information
+to identify the remote user.
+The
+.Xr login 1
+command will provide any additional user verification
+needed if the remote user is not allowed automatic
+access to the specified account.
+.It other
+Only allow connections that supply some authentication information.
+This option is currently not supported
+by any of the existing authentication mechanisms,
+and is thus the same as specifying
+.Fl a
+.Cm valid .
+.It none
+This is the default state.
+Authentication information is not required.
+If no or insufficient authentication information
+is provided, then the
+.Xr login 1
+program will provide the necessary user
+verification.
+.It off
+This disables the authentication code.
+All user verification will happen through the
+.Xr login 1
+program.
+.El
+.It Fl B
+Specifies bftp server mode.  In this mode,
+.Nm telnetd
+causes login to start a
+.Xr bftp 1
+session rather than the user's
+normal shell.  In bftp daemon mode normal
+logins are not supported, and it must be used
+on a port other than the normal
+.Tn TELNET
+port.
+.It Fl D Ar debugmode
+This option may be used for debugging purposes.
+This allows
+.Nm telnetd
+to print out debugging information
+to the connection, allowing the user to see what
+.Nm telnetd
+is doing.
+There are several possible values for 
+.Ar debugmode:
+.Bl -tag -width exercise
+.It Cm options
+Prints information about the negotiation of
+.Tn TELNET
+options.
+.It Cm report
+Prints the 
+.Cm options
+information, plus some additional information
+about what processing is going on.
+.It Cm netdata
+Displays the data stream received by
+.Nm telnetd.
+.It Cm ptydata
+Displays data written to the pty.
+.It Cm exercise
+Has not been implemented yet.
+.El
+.It Fl debug
+Enables debugging on each socket created by
+.Nm telnetd
+(see
+.Dv SO_DEBUG
+in
+.Xr socket 2 ) .
+.It Fl edebug
+If
+.Nm telnetd
+has been compiled with support for data encryption, then the
+.Fl edebug
+option may be used to enable encryption debugging code.
+.It Fl h
+Disables the printing of host-specific information before
+login has been completed.
+.It Fl I Ar initid
+This option is only applicable to
+.Tn UNICOS
+systems prior to 7.0.
+It specifies the
+.Dv ID
+from
+.Pa /etc/inittab
+to use when init starts login sessions.  The default
+.Dv ID
+is
+.Dv fe.
+.It Fl k
+This option is only useful if
+.Nm telnetd
+has been compiled with both linemode and kludge linemode
+support.  If the
+.Fl k
+option is specified, then if the remote client does not
+support the
+.Dv LINEMODE
+option, then
+.Nm telnetd
+will operate in character at a time mode.
+It will still support kludge linemode, but will only
+go into kludge linemode if the remote client requests
+it.
+(This is done by by the client sending
+.Dv DONT SUPPRESS-GO-AHEAD
+and
+.Dv DONT ECHO . )
+The
+.Fl k
+option is most useful when there are remote clients
+that do not support kludge linemode, but pass the heuristic
+(if they respond with
+.Dv WILL TIMING-MARK
+in response to a
+.Dv DO TIMING-MARK)
+for kludge linemode support.
+.It Fl l
+Specifies line mode.  Tries to force clients to use line-
+at-a-time mode.
+If the
+.Dv LINEMODE
+option is not supported, it will go
+into kludge linemode.
+.It Fl n
+Disable
+.Dv TCP
+keep-alives.  Normally
+.Nm telnetd
+enables the
+.Tn TCP
+keep-alive mechanism to probe connections that
+have been idle for some period of time to determine
+if the client is still there, so that idle connections
+from machines that have crashed or can no longer
+be reached may be cleaned up.
+.It Fl r Ar lowpty-highpty
+This option is only enabled when
+.Nm telnetd
+is compiled for
+.Dv UNICOS.
+It specifies an inclusive range of pseudo-terminal devices to
+use.  If the system has sysconf variable
+.Dv _SC_CRAY_NPTY
+configured, the default pty search range is 0 to
+.Dv _SC_CRAY_NPTY;
+otherwise, the default range is 0 to 128.  Either
+.Ar lowpty
+or
+.Ar highpty
+may be omitted to allow changing
+either end of the search range.  If
+.Ar lowpty
+is omitted, the - character is still required so that
+.Nm telnetd
+can differentiate
+.Ar highpty
+from
+.Ar lowpty .
+.It Fl s
+This option is only enabled if
+.Nm telnetd
+is compiled with support for
+.Tn SecurID
+cards.
+It causes the
+.Fl s
+option to be passed on to
+.Xr login 1 ,
+and thus is only useful if
+.Xr login 1
+supports the
+.Fl s
+flag to indicate that only
+.Tn SecurID
+validated logins are allowed, and is
+usually useful for controlling remote logins
+from outside of a firewall.
+.It Fl S Ar tos
+.It Fl u Ar len
+This option is used to specify the size of the field
+in the
+.Dv utmp
+structure that holds the remote host name.
+If the resolved host name is longer than
+.Ar len ,
+the dotted decimal value will be used instead.
+This allows hosts with very long host names that
+overflow this field to still be uniquely identified.
+Specifying
+.Fl u0
+indicates that only dotted decimal addresses
+should be put into the
+.Pa utmp
+file.
+.ne 1i
+.It Fl U
+This option causes
+.Nm telnetd
+to refuse connections from addresses that
+cannot be mapped back into a symbolic name
+via the
+.Xr gethostbyaddr 3
+routine.
+.It Fl X Ar authtype
+This option is only valid if
+.Nm telnetd
+has been built with support for the authentication option.
+It disables the use of
+.Ar authtype
+authentication, and
+can be used to temporarily disable
+a specific authentication type without having to recompile
+.Nm telnetd .
+.El
+.Pp
+.Nm Telnetd
+operates by allocating a pseudo-terminal device (see
+.Xr pty 4 )
+for a client, then creating a login process which has
+the slave side of the pseudo-terminal as 
+.Dv stdin ,
+.Dv stdout
+and
+.Dv stderr .
+.Nm Telnetd
+manipulates the master side of the pseudo-terminal,
+implementing the
+.Tn TELNET
+protocol and passing characters
+between the remote client and the login process.
+.Pp
+When a
+.Tn TELNET
+session is started up, 
+.Nm telnetd
+sends
+.Tn TELNET
+options to the client side indicating
+a willingness to do the
+following
+.Tn TELNET
+options, which are described in more detail below:
+.Bd -literal -offset indent
+DO AUTHENTICATION
+WILL ENCRYPT
+DO TERMINAL TYPE
+DO TSPEED
+DO XDISPLOC
+DO NEW-ENVIRON
+DO ENVIRON
+WILL SUPPRESS GO AHEAD
+DO ECHO
+DO LINEMODE
+DO NAWS
+WILL STATUS
+DO LFLOW
+DO TIMING-MARK
+.Ed
+.Pp
+The pseudo-terminal allocated to the client is configured
+to operate in \*(lqcooked\*(rq mode, and with
+.Dv XTABS and
+.Dv CRMOD
+enabled (see
+.Xr tty 4 ) .
+.Pp
+.Nm Telnetd
+has support for enabling locally the following
+.Tn TELNET
+options:
+.Bl -tag -width "DO AUTHENTICATION"
+.It "WILL ECHO"
+When the
+.Dv LINEMODE
+option is enabled, a
+.Dv WILL ECHO
+or
+.Dv WONT ECHO
+will be sent to the client to indicate the
+current state of terminal echoing.
+When terminal echo is not desired, a
+.Dv WILL ECHO
+is sent to indicate that
+.Tn telnetd
+will take care of echoing any data that needs to be
+echoed to the terminal, and then nothing is echoed.
+When terminal echo is desired, a
+.Dv WONT ECHO
+is sent to indicate that
+.Tn telnetd
+will not be doing any terminal echoing, so the
+client should do any terminal echoing that is needed.
+.It "WILL BINARY"
+Indicates that the client is willing to send a
+8 bits of data, rather than the normal 7 bits
+of the Network Virtual Terminal.
+.It "WILL SGA"
+Indicates that it will not be sending
+.Dv IAC GA,
+go ahead, commands.
+.It "WILL STATUS"
+Indicates a willingness to send the client, upon
+request, of the current status of all
+.Tn TELNET
+options.
+.It "WILL TIMING-MARK"
+Whenever a
+.Dv DO TIMING-MARK
+command is received, it is always responded
+to with a
+.Dv WILL TIMING-MARK
+.ne 1i
+.It "WILL LOGOUT"
+When a
+.Dv DO LOGOUT
+is received, a
+.Dv WILL LOGOUT
+is sent in response, and the
+.Tn TELNET
+session is shut down.
+.It "WILL ENCRYPT"
+Only sent if
+.Nm telnetd
+is compiled with support for data encryption, and
+indicates a willingness to decrypt
+the data stream.
+.El
+.Pp
+.Nm Telnetd
+has support for enabling remotely the following
+.Tn TELNET
+options:
+.Bl -tag -width "DO AUTHENTICATION"
+.It "DO BINARY"
+Sent to indicate that
+.Tn telnetd
+is willing to receive an 8 bit data stream.
+.It "DO LFLOW"
+Requests that the client handle flow control
+characters remotely.
+.It "DO ECHO"
+This is not really supported, but is sent to identify a 4.2BSD
+.Xr telnet 1
+client, which will improperly respond with
+.Dv WILL ECHO.
+If a
+.Dv WILL ECHO
+is received, a
+.Dv DONT ECHO
+will be sent in response.
+.It "DO TERMINAL-TYPE"
+Indicates a desire to be able to request the
+name of the type of terminal that is attached
+to the client side of the connection.
+.It "DO SGA"
+Indicates that it does not need to receive
+.Dv IAC GA,
+the go ahead command.
+.It "DO NAWS"
+Requests that the client inform the server when
+the window (display) size changes.
+.It "DO TERMINAL-SPEED"
+Indicates a desire to be able to request information
+about the speed of the serial line to which
+the client is attached.
+.It "DO XDISPLOC"
+Indicates a desire to be able to request the name
+of the X windows display that is associated with
+the telnet client.
+.It "DO NEW-ENVIRON"
+Indicates a desire to be able to request environment
+variable information, as described in RFC 1572.
+.It "DO ENVIRON"
+Indicates a desire to be able to request environment
+variable information, as described in RFC 1408.
+.It "DO LINEMODE"
+Only sent if
+.Nm telnetd
+is compiled with support for linemode, and
+requests that the client do line by line processing.
+.It "DO TIMING-MARK"
+Only sent if
+.Nm telnetd
+is compiled with support for both linemode and
+kludge linemode, and the client responded with
+.Dv WONT LINEMODE.
+If the client responds with
+.Dv WILL TM,
+the it is assumed that the client supports
+kludge linemode.
+Note that the
+.Op Fl k
+option can be used to disable this.
+.It "DO AUTHENTICATION"
+Only sent if
+.Nm telnetd
+is compiled with support for authentication, and
+indicates a willingness to receive authentication
+information for automatic login.
+.It "DO ENCRYPT"
+Only sent if
+.Nm telnetd
+is compiled with support for data encryption, and
+indicates a willingness to decrypt
+the data stream.
+.Sh ENVIRONMENT
+.Sh FILES
+.Pa /etc/services
+.br
+.Pa /etc/inittab
+(UNICOS systems only)
+.br
+.Pa /etc/iptos
+(if supported)
+.br
+.Pa /usr/ucb/bftp
+(if supported)
+.Sh "SEE ALSO"
+.Xr telnet 1 ,
+.Xr login 1 ,
+.Xr bftp 1
+(if supported)
+.Sh STANDARDS
+.Bl -tag -compact -width RFC-1572
+.It Cm RFC-854
+.Tn TELNET
+PROTOCOL SPECIFICATION
+.It Cm RFC-855
+TELNET OPTION SPECIFICATIONS
+.It Cm RFC-856
+TELNET BINARY TRANSMISSION
+.It Cm RFC-857
+TELNET ECHO OPTION
+.It Cm RFC-858
+TELNET SUPPRESS GO AHEAD OPTION
+.It Cm RFC-859
+TELNET STATUS OPTION
+.It Cm RFC-860
+TELNET TIMING MARK OPTION
+.It Cm RFC-861
+TELNET EXTENDED OPTIONS - LIST OPTION
+.It Cm RFC-885
+TELNET END OF RECORD OPTION
+.It Cm RFC-1073
+Telnet Window Size Option
+.It Cm RFC-1079
+Telnet Terminal Speed Option
+.It Cm RFC-1091
+Telnet Terminal-Type Option
+.It Cm RFC-1096
+Telnet X Display Location Option
+.It Cm RFC-1123
+Requirements for Internet Hosts -- Application and Support
+.It Cm RFC-1184
+Telnet Linemode Option
+.It Cm RFC-1372
+Telnet Remote Flow Control Option
+.It Cm RFC-1416
+Telnet Authentication Option
+.It Cm RFC-1411
+Telnet Authentication: Kerberos Version 4
+.It Cm RFC-1412
+Telnet Authentication: SPX
+.It Cm RFC-1571
+Telnet Environment Option Interoperability Issues
+.It Cm RFC-1572
+Telnet Environment Option
+.Sh BUGS
+Some
+.Tn TELNET
+commands are only partially implemented.
+.Pp
+Because of bugs in the original 4.2 BSD
+.Xr telnet 1 ,
+.Nm telnetd
+performs some dubious protocol exchanges to try to discover if the remote
+client is, in fact, a 4.2 BSD
+.Xr telnet 1 .
+.Pp
+Binary mode
+has no common interpretation except between similar operating systems
+(Unix in this case).
+.Pp
+The terminal type name received from the remote client is converted to
+lower case.
+.Pp
+.Nm Telnetd
+never sends
+.Tn TELNET
+.Dv IAC GA
+(go ahead) commands.
diff --git a/contrib/telnet/telnetd/telnetd.c b/contrib/telnet/telnetd/telnetd.c
new file mode 100644
index 0000000..70c0fc0
--- /dev/null
+++ b/contrib/telnet/telnetd/telnetd.c
@@ -0,0 +1,1608 @@
+/*
+ * Copyright (c) 1989, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef lint
+static char copyright[] =
+"@(#) Copyright (c) 1989, 1993\n\
+	The Regents of the University of California.  All rights reserved.\n";
+#endif /* not lint */
+
+#ifndef lint
+static char sccsid[] = "@(#)telnetd.c	8.4 (Berkeley) 5/30/95";
+#endif /* not lint */
+
+#include "telnetd.h"
+#include "pathnames.h"
+
+#if	defined(_SC_CRAY_SECURE_SYS) && !defined(SCM_SECURITY)
+/*
+ * UNICOS 6.0/6.1 do not have SCM_SECURITY defined, so we can
+ * use it to tell us to turn off all the socket security code,
+ * since that is only used in UNICOS 7.0 and later.
+ */
+# undef _SC_CRAY_SECURE_SYS
+#endif
+
+#if	defined(_SC_CRAY_SECURE_SYS)
+#include <sys/sysv.h>
+#include <sys/secdev.h>
+# ifdef SO_SEC_MULTI		/* 8.0 code */
+#include <sys/secparm.h>
+#include <sys/usrv.h>
+# endif /* SO_SEC_MULTI */
+int	secflag;
+char	tty_dev[16];
+struct	secdev dv;
+struct	sysv sysv;
+# ifdef SO_SEC_MULTI		/* 8.0 code */
+struct	socksec ss;
+# else /* SO_SEC_MULTI */	/* 7.0 code */
+struct	socket_security ss;
+# endif /* SO_SEC_MULTI */
+#endif	/* _SC_CRAY_SECURE_SYS */
+
+#if	defined(AUTHENTICATION)
+#include <libtelnet/auth.h>
+int	auth_level = 0;
+#endif
+#if	defined(SecurID)
+int	require_SecurID = 0;
+#endif
+
+extern	int utmp_len;
+int	registerd_host_only = 0;
+
+#ifdef	STREAMSPTY
+# include <stropts.h>
+# include <termio.h>
+/* make sure we don't get the bsd version */
+# include "/usr/include/sys/tty.h"
+# include <sys/ptyvar.h>
+
+/*
+ * Because of the way ptyibuf is used with streams messages, we need
+ * ptyibuf+1 to be on a full-word boundary.  The following wierdness
+ * is simply to make that happen.
+ */
+long	ptyibufbuf[BUFSIZ/sizeof(long)+1];
+char	*ptyibuf = ((char *)&ptyibufbuf[1])-1;
+char	*ptyip = ((char *)&ptyibufbuf[1])-1;
+char	ptyibuf2[BUFSIZ];
+unsigned char ctlbuf[BUFSIZ];
+struct	strbuf strbufc, strbufd;
+
+int readstream();
+
+#else	/* ! STREAMPTY */
+
+/*
+ * I/O data buffers,
+ * pointers, and counters.
+ */
+char	ptyibuf[BUFSIZ], *ptyip = ptyibuf;
+char	ptyibuf2[BUFSIZ];
+
+#endif /* ! STREAMPTY */
+
+int	hostinfo = 1;			/* do we print login banner? */
+
+#ifdef	CRAY
+extern int      newmap; /* nonzero if \n maps to ^M^J */
+int	lowpty = 0, highpty;	/* low, high pty numbers */
+#endif /* CRAY */
+
+int debug = 0;
+int keepalive = 1;
+char *progname;
+
+extern void usage P((void));
+
+/*
+ * The string to pass to getopt().  We do it this way so
+ * that only the actual options that we support will be
+ * passed off to getopt().
+ */
+char valid_opts[] = {
+	'd', ':', 'h', 'k', 'n', 'S', ':', 'u', ':', 'U',
+#ifdef	AUTHENTICATION
+	'a', ':', 'X', ':',
+#endif
+#ifdef BFTPDAEMON
+	'B',
+#endif
+#ifdef DIAGNOSTICS
+	'D', ':',
+#endif
+#ifdef	ENCRYPTION
+	'e', ':',
+#endif
+#if	defined(CRAY) && defined(NEWINIT)
+	'I', ':',
+#endif
+#ifdef	LINEMODE
+	'l',
+#endif
+#ifdef CRAY
+	'r', ':',
+#endif
+#ifdef	SecurID
+	's',
+#endif
+	'\0'
+};
+
+main(argc, argv)
+	char *argv[];
+{
+	struct sockaddr_in from;
+	int on = 1, fromlen;
+	register int ch;
+	extern char *optarg;
+	extern int optind;
+#if	defined(IPPROTO_IP) && defined(IP_TOS)
+	int tos = -1;
+#endif
+
+	pfrontp = pbackp = ptyobuf;
+	netip = netibuf;
+	nfrontp = nbackp = netobuf;
+#ifdef	ENCRYPTION
+	nclearto = 0;
+#endif	/* ENCRYPTION */
+
+	progname = *argv;
+
+#ifdef CRAY
+	/*
+	 * Get number of pty's before trying to process options,
+	 * which may include changing pty range.
+	 */
+	highpty = getnpty();
+#endif /* CRAY */
+
+	while ((ch = getopt(argc, argv, valid_opts)) != EOF) {
+		switch(ch) {
+
+#ifdef	AUTHENTICATION
+		case 'a':
+			/*
+			 * Check for required authentication level
+			 */
+			if (strcmp(optarg, "debug") == 0) {
+				extern int auth_debug_mode;
+				auth_debug_mode = 1;
+			} else if (strcasecmp(optarg, "none") == 0) {
+				auth_level = 0;
+			} else if (strcasecmp(optarg, "other") == 0) {
+				auth_level = AUTH_OTHER;
+			} else if (strcasecmp(optarg, "user") == 0) {
+				auth_level = AUTH_USER;
+			} else if (strcasecmp(optarg, "valid") == 0) {
+				auth_level = AUTH_VALID;
+			} else if (strcasecmp(optarg, "off") == 0) {
+				/*
+				 * This hack turns off authentication
+				 */
+				auth_level = -1;
+			} else {
+				fprintf(stderr,
+			    "telnetd: unknown authorization level for -a\n");
+			}
+			break;
+#endif	/* AUTHENTICATION */
+
+#ifdef BFTPDAEMON
+		case 'B':
+			bftpd++;
+			break;
+#endif /* BFTPDAEMON */
+
+		case 'd':
+			if (strcmp(optarg, "ebug") == 0) {
+				debug++;
+				break;
+			}
+			usage();
+			/* NOTREACHED */
+			break;
+
+#ifdef DIAGNOSTICS
+		case 'D':
+			/*
+			 * Check for desired diagnostics capabilities.
+			 */
+			if (!strcmp(optarg, "report")) {
+				diagnostic |= TD_REPORT|TD_OPTIONS;
+			} else if (!strcmp(optarg, "exercise")) {
+				diagnostic |= TD_EXERCISE;
+			} else if (!strcmp(optarg, "netdata")) {
+				diagnostic |= TD_NETDATA;
+			} else if (!strcmp(optarg, "ptydata")) {
+				diagnostic |= TD_PTYDATA;
+			} else if (!strcmp(optarg, "options")) {
+				diagnostic |= TD_OPTIONS;
+			} else {
+				usage();
+				/* NOT REACHED */
+			}
+			break;
+#endif /* DIAGNOSTICS */
+
+#ifdef	ENCRYPTION
+		case 'e':
+			if (strcmp(optarg, "debug") == 0) {
+				extern int encrypt_debug_mode;
+				encrypt_debug_mode = 1;
+				break;
+			}
+			usage();
+			/* NOTREACHED */
+			break;
+#endif	/* ENCRYPTION */
+
+		case 'h':
+			hostinfo = 0;
+			break;
+
+#if	defined(CRAY) && defined(NEWINIT)
+		case 'I':
+		    {
+			extern char *gen_id;
+			gen_id = optarg;
+			break;
+		    }
+#endif	/* defined(CRAY) && defined(NEWINIT) */
+
+#ifdef	LINEMODE
+		case 'l':
+			alwayslinemode = 1;
+			break;
+#endif	/* LINEMODE */
+
+		case 'k':
+#if	defined(LINEMODE) && defined(KLUDGELINEMODE)
+			lmodetype = NO_AUTOKLUDGE;
+#else
+			/* ignore -k option if built without kludge linemode */
+#endif	/* defined(LINEMODE) && defined(KLUDGELINEMODE) */
+			break;
+
+		case 'n':
+			keepalive = 0;
+			break;
+
+#ifdef CRAY
+		case 'r':
+		    {
+			char *strchr();
+			char *c;
+
+			/*
+			 * Allow the specification of alterations
+			 * to the pty search range.  It is legal to
+			 * specify only one, and not change the
+			 * other from its default.
+			 */
+			c = strchr(optarg, '-');
+			if (c) {
+				*c++ = '\0';
+				highpty = atoi(c);
+			}
+			if (*optarg != '\0')
+				lowpty = atoi(optarg);
+			if ((lowpty > highpty) || (lowpty < 0) ||
+							(highpty > 32767)) {
+				usage();
+				/* NOT REACHED */
+			}
+			break;
+		    }
+#endif	/* CRAY */
+
+#ifdef	SecurID
+		case 's':
+			/* SecurID required */
+			require_SecurID = 1;
+			break;
+#endif	/* SecurID */
+		case 'S':
+#ifdef	HAS_GETTOS
+			if ((tos = parsetos(optarg, "tcp")) < 0)
+				fprintf(stderr, "%s%s%s\n",
+					"telnetd: Bad TOS argument '", optarg,
+					"'; will try to use default TOS");
+#else
+			fprintf(stderr, "%s%s\n", "TOS option unavailable; ",
+						"-S flag not supported\n");
+#endif
+			break;
+
+		case 'u':
+			utmp_len = atoi(optarg);
+			break;
+
+		case 'U':
+			registerd_host_only = 1;
+			break;
+
+#ifdef	AUTHENTICATION
+		case 'X':
+			/*
+			 * Check for invalid authentication types
+			 */
+			auth_disable_name(optarg);
+			break;
+#endif	/* AUTHENTICATION */
+
+		default:
+			fprintf(stderr, "telnetd: %c: unknown option\n", ch);
+			/* FALLTHROUGH */
+		case '?':
+			usage();
+			/* NOTREACHED */
+		}
+	}
+
+	argc -= optind;
+	argv += optind;
+
+	if (debug) {
+	    int s, ns, foo;
+	    struct servent *sp;
+	    static struct sockaddr_in sin = { AF_INET };
+
+	    if (argc > 1) {
+		usage();
+		/* NOT REACHED */
+	    } else if (argc == 1) {
+		    if (sp = getservbyname(*argv, "tcp")) {
+			sin.sin_port = sp->s_port;
+		    } else {
+			sin.sin_port = atoi(*argv);
+			if ((int)sin.sin_port <= 0) {
+			    fprintf(stderr, "telnetd: %s: bad port #\n", *argv);
+			    usage();
+			    /* NOT REACHED */
+			}
+			sin.sin_port = htons((u_short)sin.sin_port);
+		   }
+	    } else {
+		sp = getservbyname("telnet", "tcp");
+		if (sp == 0) {
+		    fprintf(stderr, "telnetd: tcp/telnet: unknown service\n");
+		    exit(1);
+		}
+		sin.sin_port = sp->s_port;
+	    }
+
+	    s = socket(AF_INET, SOCK_STREAM, 0);
+	    if (s < 0) {
+		    perror("telnetd: socket");;
+		    exit(1);
+	    }
+	    (void) setsockopt(s, SOL_SOCKET, SO_REUSEADDR,
+				(char *)&on, sizeof(on));
+	    if (bind(s, (struct sockaddr *)&sin, sizeof sin) < 0) {
+		perror("bind");
+		exit(1);
+	    }
+	    if (listen(s, 1) < 0) {
+		perror("listen");
+		exit(1);
+	    }
+	    foo = sizeof sin;
+	    ns = accept(s, (struct sockaddr *)&sin, &foo);
+	    if (ns < 0) {
+		perror("accept");
+		exit(1);
+	    }
+	    (void) dup2(ns, 0);
+	    (void) close(ns);
+	    (void) close(s);
+#ifdef convex
+	} else if (argc == 1) {
+		; /* VOID*/		/* Just ignore the host/port name */
+#endif
+	} else if (argc > 0) {
+		usage();
+		/* NOT REACHED */
+	}
+
+#if	defined(_SC_CRAY_SECURE_SYS)
+	secflag = sysconf(_SC_CRAY_SECURE_SYS);
+
+	/*
+	 *	Get socket's security label
+	 */
+	if (secflag)  {
+		int szss = sizeof(ss);
+#ifdef SO_SEC_MULTI			/* 8.0 code */
+		int sock_multi;
+		int szi = sizeof(int);
+#endif /* SO_SEC_MULTI */
+
+		memset((char *)&dv, 0, sizeof(dv));
+
+		if (getsysv(&sysv, sizeof(struct sysv)) != 0) {
+			perror("getsysv");
+			exit(1);
+		}
+
+		/*
+		 *	Get socket security label and set device values
+		 *	   {security label to be set on ttyp device}
+		 */
+#ifdef SO_SEC_MULTI			/* 8.0 code */
+		if ((getsockopt(0, SOL_SOCKET, SO_SECURITY,
+			       (char *)&ss, &szss) < 0) ||
+		    (getsockopt(0, SOL_SOCKET, SO_SEC_MULTI,
+				(char *)&sock_multi, &szi) < 0)) {
+			perror("getsockopt");
+			exit(1);
+		} else {
+			dv.dv_actlvl = ss.ss_actlabel.lt_level;
+			dv.dv_actcmp = ss.ss_actlabel.lt_compart;
+			if (!sock_multi) {
+				dv.dv_minlvl = dv.dv_maxlvl = dv.dv_actlvl;
+				dv.dv_valcmp = dv.dv_actcmp;
+			} else {
+				dv.dv_minlvl = ss.ss_minlabel.lt_level;
+				dv.dv_maxlvl = ss.ss_maxlabel.lt_level;
+				dv.dv_valcmp = ss.ss_maxlabel.lt_compart;
+			}
+			dv.dv_devflg = 0;
+		}
+#else /* SO_SEC_MULTI */		/* 7.0 code */
+		if (getsockopt(0, SOL_SOCKET, SO_SECURITY,
+				(char *)&ss, &szss) >= 0) {
+			dv.dv_actlvl = ss.ss_slevel;
+			dv.dv_actcmp = ss.ss_compart;
+			dv.dv_minlvl = ss.ss_minlvl;
+			dv.dv_maxlvl = ss.ss_maxlvl;
+			dv.dv_valcmp = ss.ss_maxcmp;
+		}
+#endif /* SO_SEC_MULTI */
+	}
+#endif	/* _SC_CRAY_SECURE_SYS */
+
+	openlog("telnetd", LOG_PID | LOG_ODELAY, LOG_DAEMON);
+	fromlen = sizeof (from);
+	if (getpeername(0, (struct sockaddr *)&from, &fromlen) < 0) {
+		fprintf(stderr, "%s: ", progname);
+		perror("getpeername");
+		_exit(1);
+	}
+	if (keepalive &&
+	    setsockopt(0, SOL_SOCKET, SO_KEEPALIVE,
+			(char *)&on, sizeof (on)) < 0) {
+		syslog(LOG_WARNING, "setsockopt (SO_KEEPALIVE): %m");
+	}
+
+#if	defined(IPPROTO_IP) && defined(IP_TOS)
+	{
+# if	defined(HAS_GETTOS)
+		struct tosent *tp;
+		if (tos < 0 && (tp = gettosbyname("telnet", "tcp")))
+			tos = tp->t_tos;
+# endif
+		if (tos < 0)
+			tos = 020;	/* Low Delay bit */
+		if (tos
+		   && (setsockopt(0, IPPROTO_IP, IP_TOS,
+				  (char *)&tos, sizeof(tos)) < 0)
+		   && (errno != ENOPROTOOPT) )
+			syslog(LOG_WARNING, "setsockopt (IP_TOS): %m");
+	}
+#endif	/* defined(IPPROTO_IP) && defined(IP_TOS) */
+	net = 0;
+	doit(&from);
+	/* NOTREACHED */
+}  /* end of main */
+
+	void
+usage()
+{
+	fprintf(stderr, "Usage: telnetd");
+#ifdef	AUTHENTICATION
+	fprintf(stderr, " [-a (debug|other|user|valid|off|none)]\n\t");
+#endif
+#ifdef BFTPDAEMON
+	fprintf(stderr, " [-B]");
+#endif
+	fprintf(stderr, " [-debug]");
+#ifdef DIAGNOSTICS
+	fprintf(stderr, " [-D (options|report|exercise|netdata|ptydata)]\n\t");
+#endif
+#ifdef	AUTHENTICATION
+	fprintf(stderr, " [-edebug]");
+#endif
+	fprintf(stderr, " [-h]");
+#if	defined(CRAY) && defined(NEWINIT)
+	fprintf(stderr, " [-Iinitid]");
+#endif
+#if	defined(LINEMODE) && defined(KLUDGELINEMODE)
+	fprintf(stderr, " [-k]");
+#endif
+#ifdef LINEMODE
+	fprintf(stderr, " [-l]");
+#endif
+	fprintf(stderr, " [-n]");
+#ifdef	CRAY
+	fprintf(stderr, " [-r[lowpty]-[highpty]]");
+#endif
+	fprintf(stderr, "\n\t");
+#ifdef	SecurID
+	fprintf(stderr, " [-s]");
+#endif
+#ifdef	HAS_GETTOS
+	fprintf(stderr, " [-S tos]");
+#endif
+#ifdef	AUTHENTICATION
+	fprintf(stderr, " [-X auth-type]");
+#endif
+	fprintf(stderr, " [-u utmp_hostname_length] [-U]");
+	fprintf(stderr, " [port]\n");
+	exit(1);
+}
+
+/*
+ * getterminaltype
+ *
+ *	Ask the other end to send along its terminal type and speed.
+ * Output is the variable terminaltype filled in.
+ */
+static unsigned char ttytype_sbbuf[] = {
+	IAC, SB, TELOPT_TTYPE, TELQUAL_SEND, IAC, SE
+};
+
+    int
+getterminaltype(name)
+    char *name;
+{
+    int retval = -1;
+    void _gettermname();
+
+    settimer(baseline);
+#if	defined(AUTHENTICATION)
+    /*
+     * Handle the Authentication option before we do anything else.
+     */
+    send_do(TELOPT_AUTHENTICATION, 1);
+    while (his_will_wont_is_changing(TELOPT_AUTHENTICATION))
+	ttloop();
+    if (his_state_is_will(TELOPT_AUTHENTICATION)) {
+	retval = auth_wait(name);
+    }
+#endif
+
+#ifdef	ENCRYPTION
+    send_will(TELOPT_ENCRYPT, 1);
+#endif	/* ENCRYPTION */
+    send_do(TELOPT_TTYPE, 1);
+    send_do(TELOPT_TSPEED, 1);
+    send_do(TELOPT_XDISPLOC, 1);
+    send_do(TELOPT_NEW_ENVIRON, 1);
+    send_do(TELOPT_OLD_ENVIRON, 1);
+    while (
+#ifdef	ENCRYPTION
+	   his_do_dont_is_changing(TELOPT_ENCRYPT) ||
+#endif	/* ENCRYPTION */
+	   his_will_wont_is_changing(TELOPT_TTYPE) ||
+	   his_will_wont_is_changing(TELOPT_TSPEED) ||
+	   his_will_wont_is_changing(TELOPT_XDISPLOC) ||
+	   his_will_wont_is_changing(TELOPT_NEW_ENVIRON) ||
+	   his_will_wont_is_changing(TELOPT_OLD_ENVIRON)) {
+	ttloop();
+    }
+#ifdef	ENCRYPTION
+    /*
+     * Wait for the negotiation of what type of encryption we can
+     * send with.  If autoencrypt is not set, this will just return.
+     */
+    if (his_state_is_will(TELOPT_ENCRYPT)) {
+	encrypt_wait();
+    }
+#endif	/* ENCRYPTION */
+    if (his_state_is_will(TELOPT_TSPEED)) {
+	static unsigned char sb[] =
+			{ IAC, SB, TELOPT_TSPEED, TELQUAL_SEND, IAC, SE };
+
+	memmove(nfrontp, sb, sizeof sb);
+	nfrontp += sizeof sb;
+	DIAG(TD_OPTIONS, printsub('>', sb + 2, sizeof sb - 2););
+    }
+    if (his_state_is_will(TELOPT_XDISPLOC)) {
+	static unsigned char sb[] =
+			{ IAC, SB, TELOPT_XDISPLOC, TELQUAL_SEND, IAC, SE };
+
+	memmove(nfrontp, sb, sizeof sb);
+	nfrontp += sizeof sb;
+	DIAG(TD_OPTIONS, printsub('>', sb + 2, sizeof sb - 2););
+    }
+    if (his_state_is_will(TELOPT_NEW_ENVIRON)) {
+	static unsigned char sb[] =
+			{ IAC, SB, TELOPT_NEW_ENVIRON, TELQUAL_SEND, IAC, SE };
+
+	memmove(nfrontp, sb, sizeof sb);
+	nfrontp += sizeof sb;
+	DIAG(TD_OPTIONS, printsub('>', sb + 2, sizeof sb - 2););
+    }
+    else if (his_state_is_will(TELOPT_OLD_ENVIRON)) {
+	static unsigned char sb[] =
+			{ IAC, SB, TELOPT_OLD_ENVIRON, TELQUAL_SEND, IAC, SE };
+
+	memmove(nfrontp, sb, sizeof sb);
+	nfrontp += sizeof sb;
+	DIAG(TD_OPTIONS, printsub('>', sb + 2, sizeof sb - 2););
+    }
+    if (his_state_is_will(TELOPT_TTYPE)) {
+
+	memmove(nfrontp, ttytype_sbbuf, sizeof ttytype_sbbuf);
+	nfrontp += sizeof ttytype_sbbuf;
+	DIAG(TD_OPTIONS, printsub('>', ttytype_sbbuf + 2,
+					sizeof ttytype_sbbuf - 2););
+    }
+    if (his_state_is_will(TELOPT_TSPEED)) {
+	while (sequenceIs(tspeedsubopt, baseline))
+	    ttloop();
+    }
+    if (his_state_is_will(TELOPT_XDISPLOC)) {
+	while (sequenceIs(xdisplocsubopt, baseline))
+	    ttloop();
+    }
+    if (his_state_is_will(TELOPT_NEW_ENVIRON)) {
+	while (sequenceIs(environsubopt, baseline))
+	    ttloop();
+    }
+    if (his_state_is_will(TELOPT_OLD_ENVIRON)) {
+	while (sequenceIs(oenvironsubopt, baseline))
+	    ttloop();
+    }
+    if (his_state_is_will(TELOPT_TTYPE)) {
+	char first[256], last[256];
+
+	while (sequenceIs(ttypesubopt, baseline))
+	    ttloop();
+
+	/*
+	 * If the other side has already disabled the option, then
+	 * we have to just go with what we (might) have already gotten.
+	 */
+	if (his_state_is_will(TELOPT_TTYPE) && !terminaltypeok(terminaltype)) {
+	    (void) strncpy(first, terminaltype, sizeof(first));
+	    for(;;) {
+		/*
+		 * Save the unknown name, and request the next name.
+		 */
+		(void) strncpy(last, terminaltype, sizeof(last));
+		_gettermname();
+		if (terminaltypeok(terminaltype))
+		    break;
+		if ((strncmp(last, terminaltype, sizeof(last)) == 0) ||
+		    his_state_is_wont(TELOPT_TTYPE)) {
+		    /*
+		     * We've hit the end.  If this is the same as
+		     * the first name, just go with it.
+		     */
+		    if (strncmp(first, terminaltype, sizeof(first)) == 0)
+			break;
+		    /*
+		     * Get the terminal name one more time, so that
+		     * RFC1091 compliant telnets will cycle back to
+		     * the start of the list.
+		     */
+		     _gettermname();
+		    if (strncmp(first, terminaltype, sizeof(first)) != 0)
+			(void) strncpy(terminaltype, first, sizeof(first));
+		    break;
+		}
+	    }
+	}
+    }
+    return(retval);
+}  /* end of getterminaltype */
+
+    void
+_gettermname()
+{
+    /*
+     * If the client turned off the option,
+     * we can't send another request, so we
+     * just return.
+     */
+    if (his_state_is_wont(TELOPT_TTYPE))
+	return;
+    settimer(baseline);
+    memmove(nfrontp, ttytype_sbbuf, sizeof ttytype_sbbuf);
+    nfrontp += sizeof ttytype_sbbuf;
+    DIAG(TD_OPTIONS, printsub('>', ttytype_sbbuf + 2,
+					sizeof ttytype_sbbuf - 2););
+    while (sequenceIs(ttypesubopt, baseline))
+	ttloop();
+}
+
+    int
+terminaltypeok(s)
+    char *s;
+{
+    char buf[1024];
+
+    if (terminaltype == NULL)
+	return(1);
+
+    /*
+     * tgetent() will return 1 if the type is known, and
+     * 0 if it is not known.  If it returns -1, it couldn't
+     * open the database.  But if we can't open the database,
+     * it won't help to say we failed, because we won't be
+     * able to verify anything else.  So, we treat -1 like 1.
+     */
+    if (tgetent(buf, s) == 0)
+	return(0);
+    return(1);
+}
+
+#ifndef	MAXHOSTNAMELEN
+#define	MAXHOSTNAMELEN 64
+#endif	/* MAXHOSTNAMELEN */
+
+char *hostname;
+char host_name[MAXHOSTNAMELEN];
+char remote_host_name[MAXHOSTNAMELEN];
+
+#ifndef	convex
+extern void telnet P((int, int));
+#else
+extern void telnet P((int, int, char *));
+#endif
+
+/*
+ * Get a pty, scan input lines.
+ */
+doit(who)
+	struct sockaddr_in *who;
+{
+	char *host, *inet_ntoa();
+	int t;
+	struct hostent *hp;
+	int level;
+	int ptynum;
+	char user_name[256];
+
+	/*
+	 * Find an available pty to use.
+	 */
+#ifndef	convex
+	pty = getpty(&ptynum);
+	if (pty < 0)
+		fatal(net, "All network ports in use");
+#else
+	for (;;) {
+		char *lp;
+		extern char *line, *getpty();
+
+		if ((lp = getpty()) == NULL)
+			fatal(net, "Out of ptys");
+
+		if ((pty = open(lp, 2)) >= 0) {
+			strcpy(line,lp);
+			line[5] = 't';
+			break;
+		}
+	}
+#endif
+
+#if	defined(_SC_CRAY_SECURE_SYS)
+	/*
+	 *	set ttyp line security label
+	 */
+	if (secflag) {
+		char slave_dev[16];
+
+		sprintf(tty_dev, "/dev/pty/%03d", ptynum);
+		if (setdevs(tty_dev, &dv) < 0)
+		 	fatal(net, "cannot set pty security");
+		sprintf(slave_dev, "/dev/ttyp%03d", ptynum);
+		if (setdevs(slave_dev, &dv) < 0)
+		 	fatal(net, "cannot set tty security");
+	}
+#endif	/* _SC_CRAY_SECURE_SYS */
+
+	/* get name of connected client */
+	hp = gethostbyaddr((char *)&who->sin_addr, sizeof (struct in_addr),
+		who->sin_family);
+
+	if (hp == NULL && registerd_host_only) {
+		fatal(net, "Couldn't resolve your address into a host name.\r\n\
+	 Please contact your net administrator");
+	} else if (hp &&
+	    (strlen(hp->h_name) <= (unsigned int)((utmp_len < 0) ? -utmp_len
+								 : utmp_len))) {
+		host = hp->h_name;
+	} else {
+		host = inet_ntoa(who->sin_addr);
+	}
+	/*
+	 * We must make a copy because Kerberos is probably going
+	 * to also do a gethost* and overwrite the static data...
+	 */
+	strncpy(remote_host_name, host, sizeof(remote_host_name)-1);
+	remote_host_name[sizeof(remote_host_name)-1] = 0;
+	host = remote_host_name;
+
+	(void) gethostname(host_name, sizeof (host_name));
+	hostname = host_name;
+
+#if	defined(AUTHENTICATION) || defined(ENCRYPTION)
+	auth_encrypt_init(hostname, host, "TELNETD", 1);
+#endif
+
+	init_env();
+	/*
+	 * get terminal type.
+	 */
+	*user_name = 0;
+	level = getterminaltype(user_name);
+	setenv("TERM", terminaltype ? terminaltype : "network", 1);
+
+	/*
+	 * Start up the login process on the slave side of the terminal
+	 */
+#ifndef	convex
+	startslave(host, level, user_name);
+
+#if	defined(_SC_CRAY_SECURE_SYS)
+	if (secflag) {
+		if (setulvl(dv.dv_actlvl) < 0)
+			fatal(net,"cannot setulvl()");
+		if (setucmp(dv.dv_actcmp) < 0)
+			fatal(net, "cannot setucmp()");
+	}
+#endif	/* _SC_CRAY_SECURE_SYS */
+
+	telnet(net, pty);  /* begin server processing */
+#else
+	telnet(net, pty, host);
+#endif
+	/*NOTREACHED*/
+}  /* end of doit */
+
+#if	defined(CRAY2) && defined(UNICOS5) && defined(UNICOS50)
+	int
+Xterm_output(ibufp, obuf, icountp, ocount)
+	char **ibufp, *obuf;
+	int *icountp, ocount;
+{
+	int ret;
+	ret = term_output(*ibufp, obuf, *icountp, ocount);
+	*ibufp += *icountp;
+	*icountp = 0;
+	return(ret);
+}
+#define	term_output	Xterm_output
+#endif	/* defined(CRAY2) && defined(UNICOS5) && defined(UNICOS50) */
+
+/*
+ * Main loop.  Select from pty and network, and
+ * hand data to telnet receiver finite state machine.
+ */
+	void
+#ifndef	convex
+telnet(f, p)
+#else
+telnet(f, p, host)
+#endif
+	int f, p;
+#ifdef convex
+	char *host;
+#endif
+{
+	int on = 1;
+#define	TABBUFSIZ	512
+	char	defent[TABBUFSIZ];
+	char	defstrs[TABBUFSIZ];
+#undef	TABBUFSIZ
+	char *HE;
+	char *HN;
+	char *IM;
+	void netflush();
+	int nfd;
+
+	/*
+	 * Initialize the slc mapping table.
+	 */
+	get_slc_defaults();
+
+	/*
+	 * Do some tests where it is desireable to wait for a response.
+	 * Rather than doing them slowly, one at a time, do them all
+	 * at once.
+	 */
+	if (my_state_is_wont(TELOPT_SGA))
+		send_will(TELOPT_SGA, 1);
+	/*
+	 * Is the client side a 4.2 (NOT 4.3) system?  We need to know this
+	 * because 4.2 clients are unable to deal with TCP urgent data.
+	 *
+	 * To find out, we send out a "DO ECHO".  If the remote system
+	 * answers "WILL ECHO" it is probably a 4.2 client, and we note
+	 * that fact ("WILL ECHO" ==> that the client will echo what
+	 * WE, the server, sends it; it does NOT mean that the client will
+	 * echo the terminal input).
+	 */
+	send_do(TELOPT_ECHO, 1);
+
+#ifdef	LINEMODE
+	if (his_state_is_wont(TELOPT_LINEMODE)) {
+		/* Query the peer for linemode support by trying to negotiate
+		 * the linemode option.
+		 */
+		linemode = 0;
+		editmode = 0;
+		send_do(TELOPT_LINEMODE, 1);  /* send do linemode */
+	}
+#endif	/* LINEMODE */
+
+	/*
+	 * Send along a couple of other options that we wish to negotiate.
+	 */
+	send_do(TELOPT_NAWS, 1);
+	send_will(TELOPT_STATUS, 1);
+	flowmode = 1;		/* default flow control state */
+	restartany = -1;	/* uninitialized... */
+	send_do(TELOPT_LFLOW, 1);
+
+	/*
+	 * Spin, waiting for a response from the DO ECHO.  However,
+	 * some REALLY DUMB telnets out there might not respond
+	 * to the DO ECHO.  So, we spin looking for NAWS, (most dumb
+	 * telnets so far seem to respond with WONT for a DO that
+	 * they don't understand...) because by the time we get the
+	 * response, it will already have processed the DO ECHO.
+	 * Kludge upon kludge.
+	 */
+	while (his_will_wont_is_changing(TELOPT_NAWS))
+		ttloop();
+
+	/*
+	 * But...
+	 * The client might have sent a WILL NAWS as part of its
+	 * startup code; if so, we'll be here before we get the
+	 * response to the DO ECHO.  We'll make the assumption
+	 * that any implementation that understands about NAWS
+	 * is a modern enough implementation that it will respond
+	 * to our DO ECHO request; hence we'll do another spin
+	 * waiting for the ECHO option to settle down, which is
+	 * what we wanted to do in the first place...
+	 */
+	if (his_want_state_is_will(TELOPT_ECHO) &&
+	    his_state_is_will(TELOPT_NAWS)) {
+		while (his_will_wont_is_changing(TELOPT_ECHO))
+			ttloop();
+	}
+	/*
+	 * On the off chance that the telnet client is broken and does not
+	 * respond to the DO ECHO we sent, (after all, we did send the
+	 * DO NAWS negotiation after the DO ECHO, and we won't get here
+	 * until a response to the DO NAWS comes back) simulate the
+	 * receipt of a will echo.  This will also send a WONT ECHO
+	 * to the client, since we assume that the client failed to
+	 * respond because it believes that it is already in DO ECHO
+	 * mode, which we do not want.
+	 */
+	if (his_want_state_is_will(TELOPT_ECHO)) {
+		DIAG(TD_OPTIONS,
+			{sprintf(nfrontp, "td: simulating recv\r\n");
+			 nfrontp += strlen(nfrontp);});
+		willoption(TELOPT_ECHO);
+	}
+
+	/*
+	 * Finally, to clean things up, we turn on our echo.  This
+	 * will break stupid 4.2 telnets out of local terminal echo.
+	 */
+
+	if (my_state_is_wont(TELOPT_ECHO))
+		send_will(TELOPT_ECHO, 1);
+
+#ifndef	STREAMSPTY
+	/*
+	 * Turn on packet mode
+	 */
+	(void) ioctl(p, TIOCPKT, (char *)&on);
+#endif
+
+#if	defined(LINEMODE) && defined(KLUDGELINEMODE)
+	/*
+	 * Continuing line mode support.  If client does not support
+	 * real linemode, attempt to negotiate kludge linemode by sending
+	 * the do timing mark sequence.
+	 */
+	if (lmodetype < REAL_LINEMODE)
+		send_do(TELOPT_TM, 1);
+#endif	/* defined(LINEMODE) && defined(KLUDGELINEMODE) */
+
+	/*
+	 * Call telrcv() once to pick up anything received during
+	 * terminal type negotiation, 4.2/4.3 determination, and
+	 * linemode negotiation.
+	 */
+	telrcv();
+
+	(void) ioctl(f, FIONBIO, (char *)&on);
+	(void) ioctl(p, FIONBIO, (char *)&on);
+#if	defined(CRAY2) && defined(UNICOS5)
+	init_termdriver(f, p, interrupt, sendbrk);
+#endif
+
+#if	defined(SO_OOBINLINE)
+	(void) setsockopt(net, SOL_SOCKET, SO_OOBINLINE,
+				(char *)&on, sizeof on);
+#endif	/* defined(SO_OOBINLINE) */
+
+#ifdef	SIGTSTP
+	(void) signal(SIGTSTP, SIG_IGN);
+#endif
+#ifdef	SIGTTOU
+	/*
+	 * Ignoring SIGTTOU keeps the kernel from blocking us
+	 * in ttioct() in /sys/tty.c.
+	 */
+	(void) signal(SIGTTOU, SIG_IGN);
+#endif
+
+	(void) signal(SIGCHLD, cleanup);
+
+#if	defined(CRAY2) && defined(UNICOS5)
+	/*
+	 * Cray-2 will send a signal when pty modes are changed by slave
+	 * side.  Set up signal handler now.
+	 */
+	if ((int)signal(SIGUSR1, termstat) < 0)
+		perror("signal");
+	else if (ioctl(p, TCSIGME, (char *)SIGUSR1) < 0)
+		perror("ioctl:TCSIGME");
+	/*
+	 * Make processing loop check terminal characteristics early on.
+	 */
+	termstat();
+#endif
+
+#ifdef  TIOCNOTTY
+	{
+		register int t;
+		t = open(_PATH_TTY, O_RDWR);
+		if (t >= 0) {
+			(void) ioctl(t, TIOCNOTTY, (char *)0);
+			(void) close(t);
+		}
+	}
+#endif
+
+#if	defined(CRAY) && defined(NEWINIT) && defined(TIOCSCTTY)
+	(void) setsid();
+	ioctl(p, TIOCSCTTY, 0);
+#endif
+
+	/*
+	 * Show banner that getty never gave.
+	 *
+	 * We put the banner in the pty input buffer.  This way, it
+	 * gets carriage return null processing, etc., just like all
+	 * other pty --> client data.
+	 */
+
+#if	!defined(CRAY) || !defined(NEWINIT)
+	if (getenv("USER"))
+		hostinfo = 0;
+#endif
+
+	if (getent(defent, "default") == 1) {
+		char *getstr();
+		char *cp=defstrs;
+
+		HE = getstr("he", &cp);
+		HN = getstr("hn", &cp);
+		IM = getstr("im", &cp);
+		if (HN && *HN)
+			(void) strcpy(host_name, HN);
+		if (IM == 0)
+			IM = "";
+	} else {
+		IM = DEFAULT_IM;
+		HE = 0;
+	}
+	edithost(HE, host_name);
+	if (hostinfo && *IM)
+		putf(IM, ptyibuf2);
+
+	if (pcc)
+		(void) strncat(ptyibuf2, ptyip, pcc+1);
+	ptyip = ptyibuf2;
+	pcc = strlen(ptyip);
+#ifdef	LINEMODE
+	/*
+	 * Last check to make sure all our states are correct.
+	 */
+	init_termbuf();
+	localstat();
+#endif	/* LINEMODE */
+
+	DIAG(TD_REPORT,
+		{sprintf(nfrontp, "td: Entering processing loop\r\n");
+		 nfrontp += strlen(nfrontp);});
+
+#ifdef	convex
+	startslave(host);
+#endif
+
+	nfd = ((f > p) ? f : p) + 1;
+	for (;;) {
+		fd_set ibits, obits, xbits;
+		register int c;
+
+		if (ncc < 0 && pcc < 0)
+			break;
+
+#if	defined(CRAY2) && defined(UNICOS5)
+		if (needtermstat)
+			_termstat();
+#endif	/* defined(CRAY2) && defined(UNICOS5) */
+		FD_ZERO(&ibits);
+		FD_ZERO(&obits);
+		FD_ZERO(&xbits);
+		/*
+		 * Never look for input if there's still
+		 * stuff in the corresponding output buffer
+		 */
+		if (nfrontp - nbackp || pcc > 0) {
+			FD_SET(f, &obits);
+		} else {
+			FD_SET(p, &ibits);
+		}
+		if (pfrontp - pbackp || ncc > 0) {
+			FD_SET(p, &obits);
+		} else {
+			FD_SET(f, &ibits);
+		}
+		if (!SYNCHing) {
+			FD_SET(f, &xbits);
+		}
+		if ((c = select(nfd, &ibits, &obits, &xbits,
+						(struct timeval *)0)) < 1) {
+			if (c == -1) {
+				if (errno == EINTR) {
+					continue;
+				}
+			}
+			sleep(5);
+			continue;
+		}
+
+		/*
+		 * Any urgent data?
+		 */
+		if (FD_ISSET(net, &xbits)) {
+		    SYNCHing = 1;
+		}
+
+		/*
+		 * Something to read from the network...
+		 */
+		if (FD_ISSET(net, &ibits)) {
+#if	!defined(SO_OOBINLINE)
+			/*
+			 * In 4.2 (and 4.3 beta) systems, the
+			 * OOB indication and data handling in the kernel
+			 * is such that if two separate TCP Urgent requests
+			 * come in, one byte of TCP data will be overlaid.
+			 * This is fatal for Telnet, but we try to live
+			 * with it.
+			 *
+			 * In addition, in 4.2 (and...), a special protocol
+			 * is needed to pick up the TCP Urgent data in
+			 * the correct sequence.
+			 *
+			 * What we do is:  if we think we are in urgent
+			 * mode, we look to see if we are "at the mark".
+			 * If we are, we do an OOB receive.  If we run
+			 * this twice, we will do the OOB receive twice,
+			 * but the second will fail, since the second
+			 * time we were "at the mark", but there wasn't
+			 * any data there (the kernel doesn't reset
+			 * "at the mark" until we do a normal read).
+			 * Once we've read the OOB data, we go ahead
+			 * and do normal reads.
+			 *
+			 * There is also another problem, which is that
+			 * since the OOB byte we read doesn't put us
+			 * out of OOB state, and since that byte is most
+			 * likely the TELNET DM (data mark), we would
+			 * stay in the TELNET SYNCH (SYNCHing) state.
+			 * So, clocks to the rescue.  If we've "just"
+			 * received a DM, then we test for the
+			 * presence of OOB data when the receive OOB
+			 * fails (and AFTER we did the normal mode read
+			 * to clear "at the mark").
+			 */
+		    if (SYNCHing) {
+			int atmark;
+
+			(void) ioctl(net, SIOCATMARK, (char *)&atmark);
+			if (atmark) {
+			    ncc = recv(net, netibuf, sizeof (netibuf), MSG_OOB);
+			    if ((ncc == -1) && (errno == EINVAL)) {
+				ncc = read(net, netibuf, sizeof (netibuf));
+				if (sequenceIs(didnetreceive, gotDM)) {
+				    SYNCHing = stilloob(net);
+				}
+			    }
+			} else {
+			    ncc = read(net, netibuf, sizeof (netibuf));
+			}
+		    } else {
+			ncc = read(net, netibuf, sizeof (netibuf));
+		    }
+		    settimer(didnetreceive);
+#else	/* !defined(SO_OOBINLINE)) */
+		    ncc = read(net, netibuf, sizeof (netibuf));
+#endif	/* !defined(SO_OOBINLINE)) */
+		    if (ncc < 0 && errno == EWOULDBLOCK)
+			ncc = 0;
+		    else {
+			if (ncc <= 0) {
+			    break;
+			}
+			netip = netibuf;
+		    }
+		    DIAG((TD_REPORT | TD_NETDATA),
+			    {sprintf(nfrontp, "td: netread %d chars\r\n", ncc);
+			     nfrontp += strlen(nfrontp);});
+		    DIAG(TD_NETDATA, printdata("nd", netip, ncc));
+		}
+
+		/*
+		 * Something to read from the pty...
+		 */
+		if (FD_ISSET(p, &ibits)) {
+#ifndef	STREAMSPTY
+			pcc = read(p, ptyibuf, BUFSIZ);
+#else
+			pcc = readstream(p, ptyibuf, BUFSIZ);
+#endif
+			/*
+			 * On some systems, if we try to read something
+			 * off the master side before the slave side is
+			 * opened, we get EIO.
+			 */
+			if (pcc < 0 && (errno == EWOULDBLOCK ||
+#ifdef	EAGAIN
+					errno == EAGAIN ||
+#endif
+					errno == EIO)) {
+				pcc = 0;
+			} else {
+				if (pcc <= 0)
+					break;
+#if	!defined(CRAY2) || !defined(UNICOS5)
+#ifdef	LINEMODE
+				/*
+				 * If ioctl from pty, pass it through net
+				 */
+				if (ptyibuf[0] & TIOCPKT_IOCTL) {
+					copy_termbuf(ptyibuf+1, pcc-1);
+					localstat();
+					pcc = 1;
+				}
+#endif	/* LINEMODE */
+				if (ptyibuf[0] & TIOCPKT_FLUSHWRITE) {
+					netclear();	/* clear buffer back */
+#ifndef	NO_URGENT
+					/*
+					 * There are client telnets on some
+					 * operating systems get screwed up
+					 * royally if we send them urgent
+					 * mode data.
+					 */
+					*nfrontp++ = IAC;
+					*nfrontp++ = DM;
+					neturg = nfrontp-1; /* off by one XXX */
+					DIAG(TD_OPTIONS,
+					    printoption("td: send IAC", DM));
+
+#endif
+				}
+				if (his_state_is_will(TELOPT_LFLOW) &&
+				    (ptyibuf[0] &
+				     (TIOCPKT_NOSTOP|TIOCPKT_DOSTOP))) {
+					int newflow =
+					    ptyibuf[0] & TIOCPKT_DOSTOP ? 1 : 0;
+					if (newflow != flowmode) {
+						flowmode = newflow;
+						(void) sprintf(nfrontp,
+							"%c%c%c%c%c%c",
+							IAC, SB, TELOPT_LFLOW,
+							flowmode ? LFLOW_ON
+								 : LFLOW_OFF,
+							IAC, SE);
+						nfrontp += 6;
+						DIAG(TD_OPTIONS, printsub('>',
+						    (unsigned char *)nfrontp-4,
+						    4););
+					}
+				}
+				pcc--;
+				ptyip = ptyibuf+1;
+#else	/* defined(CRAY2) && defined(UNICOS5) */
+				if (!uselinemode) {
+					unpcc = pcc;
+					unptyip = ptyibuf;
+					pcc = term_output(&unptyip, ptyibuf2,
+								&unpcc, BUFSIZ);
+					ptyip = ptyibuf2;
+				} else
+					ptyip = ptyibuf;
+#endif	/* defined(CRAY2) && defined(UNICOS5) */
+			}
+		}
+
+		while (pcc > 0) {
+			if ((&netobuf[BUFSIZ] - nfrontp) < 2)
+				break;
+			c = *ptyip++ & 0377, pcc--;
+			if (c == IAC)
+				*nfrontp++ = c;
+#if	defined(CRAY2) && defined(UNICOS5)
+			else if (c == '\n' &&
+				     my_state_is_wont(TELOPT_BINARY) && newmap)
+				*nfrontp++ = '\r';
+#endif	/* defined(CRAY2) && defined(UNICOS5) */
+			*nfrontp++ = c;
+			if ((c == '\r') && (my_state_is_wont(TELOPT_BINARY))) {
+				if (pcc > 0 && ((*ptyip & 0377) == '\n')) {
+					*nfrontp++ = *ptyip++ & 0377;
+					pcc--;
+				} else
+					*nfrontp++ = '\0';
+			}
+		}
+#if	defined(CRAY2) && defined(UNICOS5)
+		/*
+		 * If chars were left over from the terminal driver,
+		 * note their existence.
+		 */
+		if (!uselinemode && unpcc) {
+			pcc = unpcc;
+			unpcc = 0;
+			ptyip = unptyip;
+		}
+#endif	/* defined(CRAY2) && defined(UNICOS5) */
+
+		if (FD_ISSET(f, &obits) && (nfrontp - nbackp) > 0)
+			netflush();
+		if (ncc > 0)
+			telrcv();
+		if (FD_ISSET(p, &obits) && (pfrontp - pbackp) > 0)
+			ptyflush();
+	}
+	cleanup(0);
+}  /* end of telnet */
+
+#ifndef	TCSIG
+# ifdef	TIOCSIG
+#  define TCSIG TIOCSIG
+# endif
+#endif
+
+#ifdef	STREAMSPTY
+
+int flowison = -1;  /* current state of flow: -1 is unknown */
+
+int readstream(p, ibuf, bufsize)
+	int p;
+	char *ibuf;
+	int bufsize;
+{
+	int flags = 0;
+	int ret = 0;
+	struct termios *tsp;
+	struct termio *tp;
+	struct iocblk *ip;
+	char vstop, vstart;
+	int ixon;
+	int newflow;
+
+	strbufc.maxlen = BUFSIZ;
+	strbufc.buf = (char *)ctlbuf;
+	strbufd.maxlen = bufsize-1;
+	strbufd.len = 0;
+	strbufd.buf = ibuf+1;
+	ibuf[0] = 0;
+
+	ret = getmsg(p, &strbufc, &strbufd, &flags);
+	if (ret < 0)  /* error of some sort -- probably EAGAIN */
+		return(-1);
+
+	if (strbufc.len <= 0 || ctlbuf[0] == M_DATA) {
+		/* data message */
+		if (strbufd.len > 0) {			/* real data */
+			return(strbufd.len + 1);	/* count header char */
+		} else {
+			/* nothing there */
+			errno = EAGAIN;
+			return(-1);
+		}
+	}
+
+	/*
+	 * It's a control message.  Return 1, to look at the flag we set
+	 */
+
+	switch (ctlbuf[0]) {
+	case M_FLUSH:
+		if (ibuf[1] & FLUSHW)
+			ibuf[0] = TIOCPKT_FLUSHWRITE;
+		return(1);
+
+	case M_IOCTL:
+		ip = (struct iocblk *) (ibuf+1);
+
+		switch (ip->ioc_cmd) {
+		case TCSETS:
+		case TCSETSW:
+		case TCSETSF:
+			tsp = (struct termios *)
+					(ibuf+1 + sizeof(struct iocblk));
+			vstop = tsp->c_cc[VSTOP];
+			vstart = tsp->c_cc[VSTART];
+			ixon = tsp->c_iflag & IXON;
+			break;
+		case TCSETA:
+		case TCSETAW:
+		case TCSETAF:
+			tp = (struct termio *) (ibuf+1 + sizeof(struct iocblk));
+			vstop = tp->c_cc[VSTOP];
+			vstart = tp->c_cc[VSTART];
+			ixon = tp->c_iflag & IXON;
+			break;
+		default:
+			errno = EAGAIN;
+			return(-1);
+		}
+
+		newflow =  (ixon && (vstart == 021) && (vstop == 023)) ? 1 : 0;
+		if (newflow != flowison) {  /* it's a change */
+			flowison = newflow;
+			ibuf[0] = newflow ? TIOCPKT_DOSTOP : TIOCPKT_NOSTOP;
+			return(1);
+		}
+	}
+
+	/* nothing worth doing anything about */
+	errno = EAGAIN;
+	return(-1);
+}
+#endif /* STREAMSPTY */
+
+/*
+ * Send interrupt to process on other side of pty.
+ * If it is in raw mode, just write NULL;
+ * otherwise, write intr char.
+ */
+	void
+interrupt()
+{
+	ptyflush();	/* half-hearted */
+
+#if defined(STREAMSPTY) && defined(TIOCSIGNAL)
+	/* Streams PTY style ioctl to post a signal */
+	{
+		int sig = SIGINT;
+		(void) ioctl(pty, TIOCSIGNAL, &sig);
+		(void) ioctl(pty, I_FLUSH, FLUSHR);
+	}
+#else
+#ifdef	TCSIG
+	(void) ioctl(pty, TCSIG, (char *)SIGINT);
+#else	/* TCSIG */
+	init_termbuf();
+	*pfrontp++ = slctab[SLC_IP].sptr ?
+			(unsigned char)*slctab[SLC_IP].sptr : '\177';
+#endif	/* TCSIG */
+#endif
+}
+
+/*
+ * Send quit to process on other side of pty.
+ * If it is in raw mode, just write NULL;
+ * otherwise, write quit char.
+ */
+	void
+sendbrk()
+{
+	ptyflush();	/* half-hearted */
+#ifdef	TCSIG
+	(void) ioctl(pty, TCSIG, (char *)SIGQUIT);
+#else	/* TCSIG */
+	init_termbuf();
+	*pfrontp++ = slctab[SLC_ABORT].sptr ?
+			(unsigned char)*slctab[SLC_ABORT].sptr : '\034';
+#endif	/* TCSIG */
+}
+
+	void
+sendsusp()
+{
+#ifdef	SIGTSTP
+	ptyflush();	/* half-hearted */
+# ifdef	TCSIG
+	(void) ioctl(pty, TCSIG, (char *)SIGTSTP);
+# else	/* TCSIG */
+	*pfrontp++ = slctab[SLC_SUSP].sptr ?
+			(unsigned char)*slctab[SLC_SUSP].sptr : '\032';
+# endif	/* TCSIG */
+#endif	/* SIGTSTP */
+}
+
+/*
+ * When we get an AYT, if ^T is enabled, use that.  Otherwise,
+ * just send back "[Yes]".
+ */
+	void
+recv_ayt()
+{
+#if	defined(SIGINFO) && defined(TCSIG)
+	if (slctab[SLC_AYT].sptr && *slctab[SLC_AYT].sptr != _POSIX_VDISABLE) {
+		(void) ioctl(pty, TCSIG, (char *)SIGINFO);
+		return;
+	}
+#endif
+	(void) strcpy(nfrontp, "\r\n[Yes]\r\n");
+	nfrontp += 9;
+}
+
+	void
+doeof()
+{
+	init_termbuf();
+
+#if	defined(LINEMODE) && defined(USE_TERMIO) && (VEOF == VMIN)
+	if (!tty_isediting()) {
+		extern char oldeofc;
+		*pfrontp++ = oldeofc;
+		return;
+	}
+#endif
+	*pfrontp++ = slctab[SLC_EOF].sptr ?
+			(unsigned char)*slctab[SLC_EOF].sptr : '\004';
+}
diff --git a/contrib/telnet/telnetd/telnetd.h b/contrib/telnet/telnetd/telnetd.h
new file mode 100644
index 0000000..234b973
--- /dev/null
+++ b/contrib/telnet/telnetd/telnetd.h
@@ -0,0 +1,49 @@
+/*
+ * Copyright (c) 1989, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *	@(#)telnetd.h	8.1 (Berkeley) 6/4/93
+ */
+
+
+#include "defs.h"
+#include "ext.h"
+
+#ifdef	DIAGNOSTICS
+#define	DIAG(a,b)	if (diagnostic & (a)) b
+#else
+#define	DIAG(a,b)
+#endif
+
+/* other external variables */
+extern	char **environ;
+extern	int errno;
+
diff --git a/contrib/telnet/telnetd/termstat.c b/contrib/telnet/telnetd/termstat.c
new file mode 100644
index 0000000..ebc843a
--- /dev/null
+++ b/contrib/telnet/telnetd/termstat.c
@@ -0,0 +1,660 @@
+/*
+ * Copyright (c) 1989, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef lint
+static char sccsid[] = "@(#)termstat.c	8.2 (Berkeley) 5/30/95";
+#endif /* not lint */
+
+#include "telnetd.h"
+
+/*
+ * local variables
+ */
+int def_tspeed = -1, def_rspeed = -1;
+#ifdef	TIOCSWINSZ
+int def_row = 0, def_col = 0;
+#endif
+#ifdef	LINEMODE
+static int _terminit = 0;
+#endif	/* LINEMODE */
+
+#if	defined(CRAY2) && defined(UNICOS5)
+int	newmap = 1;	/* nonzero if \n maps to ^M^J */
+#endif
+
+#ifdef	LINEMODE
+/*
+ * localstat
+ *
+ * This function handles all management of linemode.
+ *
+ * Linemode allows the client to do the local editing of data
+ * and send only complete lines to the server.  Linemode state is
+ * based on the state of the pty driver.  If the pty is set for
+ * external processing, then we can use linemode.  Further, if we
+ * can use real linemode, then we can look at the edit control bits
+ * in the pty to determine what editing the client should do.
+ *
+ * Linemode support uses the following state flags to keep track of
+ * current and desired linemode state.
+ *	alwayslinemode : true if -l was specified on the telnetd
+ * 	command line.  It means to have linemode on as much as
+ *	possible.
+ *
+ * 	lmodetype: signifies whether the client can
+ *	handle real linemode, or if use of kludgeomatic linemode
+ *	is preferred.  It will be set to one of the following:
+ *		REAL_LINEMODE : use linemode option
+ *		NO_KLUDGE : don't initiate kludge linemode.
+ *		KLUDGE_LINEMODE : use kludge linemode
+ *		NO_LINEMODE : client is ignorant of linemode
+ *
+ *	linemode, uselinemode : linemode is true if linemode
+ *	is currently on, uselinemode is the state that we wish
+ *	to be in.  If another function wishes to turn linemode
+ *	on or off, it sets or clears uselinemode.
+ *
+ *	editmode, useeditmode : like linemode/uselinemode, but
+ *	these contain the edit mode states (edit and trapsig).
+ *
+ * The state variables correspond to some of the state information
+ * in the pty.
+ *	linemode:
+ *		In real linemode, this corresponds to whether the pty
+ *		expects external processing of incoming data.
+ *		In kludge linemode, this more closely corresponds to the
+ *		whether normal processing is on or not.  (ICANON in
+ *		system V, or COOKED mode in BSD.)
+ *		If the -l option was specified (alwayslinemode), then
+ *		an attempt is made to force external processing on at
+ *		all times.
+ *
+ * The following heuristics are applied to determine linemode
+ * handling within the server.
+ *	1) Early on in starting up the server, an attempt is made
+ *	   to negotiate the linemode option.  If this succeeds
+ *	   then lmodetype is set to REAL_LINEMODE and all linemode
+ *	   processing occurs in the context of the linemode option.
+ *	2) If the attempt to negotiate the linemode option failed,
+ *	   and the "-k" (don't initiate kludge linemode) isn't set,
+ *	   then we try to use kludge linemode.  We test for this
+ *	   capability by sending "do Timing Mark".  If a positive
+ *	   response comes back, then we assume that the client
+ *	   understands kludge linemode (ech!) and the
+ *	   lmodetype flag is set to KLUDGE_LINEMODE.
+ *	3) Otherwise, linemode is not supported at all and
+ *	   lmodetype remains set to NO_LINEMODE (which happens
+ *	   to be 0 for convenience).
+ *	4) At any time a command arrives that implies a higher
+ *	   state of linemode support in the client, we move to that
+ *	   linemode support.
+ *
+ * A short explanation of kludge linemode is in order here.
+ *	1) The heuristic to determine support for kludge linemode
+ *	   is to send a do timing mark.  We assume that a client
+ *	   that supports timing marks also supports kludge linemode.
+ *	   A risky proposition at best.
+ *	2) Further negotiation of linemode is done by changing the
+ *	   the server's state regarding SGA.  If server will SGA,
+ *	   then linemode is off, if server won't SGA, then linemode
+ *	   is on.
+ */
+	void
+localstat()
+{
+	void netflush();
+	int need_will_echo = 0;
+
+#if	defined(CRAY2) && defined(UNICOS5)
+	/*
+	 * Keep track of that ol' CR/NL mapping while we're in the
+	 * neighborhood.
+	 */
+	newmap = tty_isnewmap();
+#endif	/* defined(CRAY2) && defined(UNICOS5) */
+
+	/*
+	 * Check for state of BINARY options.
+	 */
+	if (tty_isbinaryin()) {
+		if (his_want_state_is_wont(TELOPT_BINARY))
+			send_do(TELOPT_BINARY, 1);
+	} else {
+		if (his_want_state_is_will(TELOPT_BINARY))
+			send_dont(TELOPT_BINARY, 1);
+	}
+
+	if (tty_isbinaryout()) {
+		if (my_want_state_is_wont(TELOPT_BINARY))
+			send_will(TELOPT_BINARY, 1);
+	} else {
+		if (my_want_state_is_will(TELOPT_BINARY))
+			send_wont(TELOPT_BINARY, 1);
+	}
+
+	/*
+	 * Check for changes to flow control if client supports it.
+	 */
+	flowstat();
+
+	/*
+	 * Check linemode on/off state
+	 */
+	uselinemode = tty_linemode();
+
+	/*
+	 * If alwayslinemode is on, and pty is changing to turn it off, then
+	 * force linemode back on.
+	 */
+	if (alwayslinemode && linemode && !uselinemode) {
+		uselinemode = 1;
+		tty_setlinemode(uselinemode);
+	}
+
+#ifdef	ENCRYPTION
+	/*
+	 * If the terminal is not echoing, but editing is enabled,
+	 * something like password input is going to happen, so
+	 * if we the other side is not currently sending encrypted
+	 * data, ask the other side to start encrypting.
+	 */
+	if (his_state_is_will(TELOPT_ENCRYPT)) {
+		static int enc_passwd = 0;
+		if (uselinemode && !tty_isecho() && tty_isediting()
+		    && (enc_passwd == 0) && !decrypt_input) {
+			encrypt_send_request_start();
+			enc_passwd = 1;
+		} else if (enc_passwd) {
+			encrypt_send_request_end();
+			enc_passwd = 0;
+		}
+	}
+#endif	/* ENCRYPTION */
+
+	/*
+	 * Do echo mode handling as soon as we know what the
+	 * linemode is going to be.
+	 * If the pty has echo turned off, then tell the client that
+	 * the server will echo.  If echo is on, then the server
+	 * will echo if in character mode, but in linemode the
+	 * client should do local echoing.  The state machine will
+	 * not send anything if it is unnecessary, so don't worry
+	 * about that here.
+	 *
+	 * If we need to send the WILL ECHO (because echo is off),
+	 * then delay that until after we have changed the MODE.
+	 * This way, when the user is turning off both editing
+	 * and echo, the client will get editing turned off first.
+	 * This keeps the client from going into encryption mode
+	 * and then right back out if it is doing auto-encryption
+	 * when passwords are being typed.
+	 */
+	if (uselinemode) {
+		if (tty_isecho())
+			send_wont(TELOPT_ECHO, 1);
+		else
+			need_will_echo = 1;
+#ifdef	KLUDGELINEMODE
+		if (lmodetype == KLUDGE_OK)
+			lmodetype = KLUDGE_LINEMODE;
+#endif
+	}
+
+	/*
+	 * If linemode is being turned off, send appropriate
+	 * command and then we're all done.
+	 */
+	 if (!uselinemode && linemode) {
+# ifdef	KLUDGELINEMODE
+		if (lmodetype == REAL_LINEMODE) {
+# endif	/* KLUDGELINEMODE */
+			send_dont(TELOPT_LINEMODE, 1);
+# ifdef	KLUDGELINEMODE
+		} else if (lmodetype == KLUDGE_LINEMODE)
+			send_will(TELOPT_SGA, 1);
+# endif	/* KLUDGELINEMODE */
+		send_will(TELOPT_ECHO, 1);
+		linemode = uselinemode;
+		goto done;
+	}
+
+# ifdef	KLUDGELINEMODE
+	/*
+	 * If using real linemode check edit modes for possible later use.
+	 * If we are in kludge linemode, do the SGA negotiation.
+	 */
+	if (lmodetype == REAL_LINEMODE) {
+# endif	/* KLUDGELINEMODE */
+		useeditmode = 0;
+		if (tty_isediting())
+			useeditmode |= MODE_EDIT;
+		if (tty_istrapsig())
+			useeditmode |= MODE_TRAPSIG;
+		if (tty_issofttab())
+			useeditmode |= MODE_SOFT_TAB;
+		if (tty_islitecho())
+			useeditmode |= MODE_LIT_ECHO;
+# ifdef	KLUDGELINEMODE
+	} else if (lmodetype == KLUDGE_LINEMODE) {
+		if (tty_isediting() && uselinemode)
+			send_wont(TELOPT_SGA, 1);
+		else
+			send_will(TELOPT_SGA, 1);
+	}
+# endif	/* KLUDGELINEMODE */
+
+	/*
+	 * Negotiate linemode on if pty state has changed to turn it on.
+	 * Send appropriate command and send along edit mode, then all done.
+	 */
+	if (uselinemode && !linemode) {
+# ifdef	KLUDGELINEMODE
+		if (lmodetype == KLUDGE_LINEMODE) {
+			send_wont(TELOPT_SGA, 1);
+		} else if (lmodetype == REAL_LINEMODE) {
+# endif	/* KLUDGELINEMODE */
+			send_do(TELOPT_LINEMODE, 1);
+			/* send along edit modes */
+			(void) sprintf(nfrontp, "%c%c%c%c%c%c%c", IAC, SB,
+				TELOPT_LINEMODE, LM_MODE, useeditmode,
+				IAC, SE);
+			nfrontp += 7;
+			editmode = useeditmode;
+# ifdef	KLUDGELINEMODE
+		}
+# endif	/* KLUDGELINEMODE */
+		linemode = uselinemode;
+		goto done;
+	}
+
+# ifdef	KLUDGELINEMODE
+	/*
+	 * None of what follows is of any value if not using
+	 * real linemode.
+	 */
+	if (lmodetype < REAL_LINEMODE)
+		goto done;
+# endif	/* KLUDGELINEMODE */
+
+	if (linemode && his_state_is_will(TELOPT_LINEMODE)) {
+		/*
+		 * If edit mode changed, send edit mode.
+		 */
+		 if (useeditmode != editmode) {
+			/*
+			 * Send along appropriate edit mode mask.
+			 */
+			(void) sprintf(nfrontp, "%c%c%c%c%c%c%c", IAC, SB,
+				TELOPT_LINEMODE, LM_MODE, useeditmode,
+				IAC, SE);
+			nfrontp += 7;
+			editmode = useeditmode;
+		}
+
+
+		/*
+		 * Check for changes to special characters in use.
+		 */
+		start_slc(0);
+		check_slc();
+		(void) end_slc(0);
+	}
+
+done:
+	if (need_will_echo)
+		send_will(TELOPT_ECHO, 1);
+	/*
+	 * Some things should be deferred until after the pty state has
+	 * been set by the local process.  Do those things that have been
+	 * deferred now.  This only happens once.
+	 */
+	if (_terminit == 0) {
+		_terminit = 1;
+		defer_terminit();
+	}
+
+	netflush();
+	set_termbuf();
+	return;
+
+}  /* end of localstat */
+#endif	/* LINEMODE */
+
+/*
+ * flowstat
+ *
+ * Check for changes to flow control
+ */
+	void
+flowstat()
+{
+	if (his_state_is_will(TELOPT_LFLOW)) {
+		if (tty_flowmode() != flowmode) {
+			flowmode = tty_flowmode();
+			(void) sprintf(nfrontp, "%c%c%c%c%c%c",
+					IAC, SB, TELOPT_LFLOW,
+					flowmode ? LFLOW_ON : LFLOW_OFF,
+					IAC, SE);
+			nfrontp += 6;
+		}
+		if (tty_restartany() != restartany) {
+			restartany = tty_restartany();
+			(void) sprintf(nfrontp, "%c%c%c%c%c%c",
+					IAC, SB, TELOPT_LFLOW,
+					restartany ? LFLOW_RESTART_ANY
+						   : LFLOW_RESTART_XON,
+					IAC, SE);
+			nfrontp += 6;
+		}
+	}
+}
+
+/*
+ * clientstat
+ *
+ * Process linemode related requests from the client.
+ * Client can request a change to only one of linemode, editmode or slc's
+ * at a time, and if using kludge linemode, then only linemode may be
+ * affected.
+ */
+	void
+clientstat(code, parm1, parm2)
+	register int code, parm1, parm2;
+{
+	void netflush();
+
+	/*
+	 * Get a copy of terminal characteristics.
+	 */
+	init_termbuf();
+
+	/*
+	 * Process request from client. code tells what it is.
+	 */
+	switch (code) {
+#ifdef	LINEMODE
+	case TELOPT_LINEMODE:
+		/*
+		 * Don't do anything unless client is asking us to change
+		 * modes.
+		 */
+		uselinemode = (parm1 == WILL);
+		if (uselinemode != linemode) {
+# ifdef	KLUDGELINEMODE
+			/*
+			 * If using kludge linemode, make sure that
+			 * we can do what the client asks.
+			 * We can not turn off linemode if alwayslinemode
+			 * and the ICANON bit is set.
+			 */
+			if (lmodetype == KLUDGE_LINEMODE) {
+				if (alwayslinemode && tty_isediting()) {
+					uselinemode = 1;
+				}
+			}
+
+			/*
+			 * Quit now if we can't do it.
+			 */
+			if (uselinemode == linemode)
+				return;
+
+			/*
+			 * If using real linemode and linemode is being
+			 * turned on, send along the edit mode mask.
+			 */
+			if (lmodetype == REAL_LINEMODE && uselinemode)
+# else	/* KLUDGELINEMODE */
+			if (uselinemode)
+# endif	/* KLUDGELINEMODE */
+			{
+				useeditmode = 0;
+				if (tty_isediting())
+					useeditmode |= MODE_EDIT;
+				if (tty_istrapsig)
+					useeditmode |= MODE_TRAPSIG;
+				if (tty_issofttab())
+					useeditmode |= MODE_SOFT_TAB;
+				if (tty_islitecho())
+					useeditmode |= MODE_LIT_ECHO;
+				(void) sprintf(nfrontp, "%c%c%c%c%c%c%c", IAC,
+					SB, TELOPT_LINEMODE, LM_MODE,
+							useeditmode, IAC, SE);
+				nfrontp += 7;
+				editmode = useeditmode;
+			}
+
+
+			tty_setlinemode(uselinemode);
+
+			linemode = uselinemode;
+
+			if (!linemode)
+				send_will(TELOPT_ECHO, 1);
+		}
+		break;
+
+	case LM_MODE:
+	    {
+		register int ack, changed;
+
+		/*
+		 * Client has sent along a mode mask.  If it agrees with
+		 * what we are currently doing, ignore it; if not, it could
+		 * be viewed as a request to change.  Note that the server
+		 * will change to the modes in an ack if it is different from
+		 * what we currently have, but we will not ack the ack.
+		 */
+		 useeditmode &= MODE_MASK;
+		 ack = (useeditmode & MODE_ACK);
+		 useeditmode &= ~MODE_ACK;
+
+		 if (changed = (useeditmode ^ editmode)) {
+			/*
+			 * This check is for a timing problem.  If the
+			 * state of the tty has changed (due to the user
+			 * application) we need to process that info
+			 * before we write in the state contained in the
+			 * ack!!!  This gets out the new MODE request,
+			 * and when the ack to that command comes back
+			 * we'll set it and be in the right mode.
+			 */
+			if (ack)
+				localstat();
+			if (changed & MODE_EDIT)
+				tty_setedit(useeditmode & MODE_EDIT);
+
+			if (changed & MODE_TRAPSIG)
+				tty_setsig(useeditmode & MODE_TRAPSIG);
+
+			if (changed & MODE_SOFT_TAB)
+				tty_setsofttab(useeditmode & MODE_SOFT_TAB);
+
+			if (changed & MODE_LIT_ECHO)
+				tty_setlitecho(useeditmode & MODE_LIT_ECHO);
+
+			set_termbuf();
+
+ 			if (!ack) {
+ 				(void) sprintf(nfrontp, "%c%c%c%c%c%c%c", IAC,
+					SB, TELOPT_LINEMODE, LM_MODE,
+ 					useeditmode|MODE_ACK,
+ 					IAC, SE);
+ 				nfrontp += 7;
+ 			}
+
+			editmode = useeditmode;
+		}
+
+		break;
+
+	    }  /* end of case LM_MODE */
+#endif	/* LINEMODE */
+
+	case TELOPT_NAWS:
+#ifdef	TIOCSWINSZ
+	    {
+		struct winsize ws;
+
+		def_col = parm1;
+		def_row = parm2;
+#ifdef	LINEMODE
+		/*
+		 * Defer changing window size until after terminal is
+		 * initialized.
+		 */
+		if (terminit() == 0)
+			return;
+#endif	/* LINEMODE */
+
+		/*
+		 * Change window size as requested by client.
+		 */
+
+		ws.ws_col = parm1;
+		ws.ws_row = parm2;
+		(void) ioctl(pty, TIOCSWINSZ, (char *)&ws);
+	    }
+#endif	/* TIOCSWINSZ */
+
+		break;
+
+	case TELOPT_TSPEED:
+	    {
+		def_tspeed = parm1;
+		def_rspeed = parm2;
+#ifdef	LINEMODE
+		/*
+		 * Defer changing the terminal speed.
+		 */
+		if (terminit() == 0)
+			return;
+#endif	/* LINEMODE */
+		/*
+		 * Change terminal speed as requested by client.
+		 * We set the receive speed first, so that if we can't
+		 * store seperate receive and transmit speeds, the transmit
+		 * speed will take precedence.
+		 */
+		tty_rspeed(parm2);
+		tty_tspeed(parm1);
+		set_termbuf();
+
+		break;
+
+	    }  /* end of case TELOPT_TSPEED */
+
+	default:
+		/* What? */
+		break;
+	}  /* end of switch */
+
+#if	defined(CRAY2) && defined(UNICOS5)
+	/*
+	 * Just in case of the likely event that we changed the pty state.
+	 */
+	rcv_ioctl();
+#endif	/* defined(CRAY2) && defined(UNICOS5) */
+
+	netflush();
+
+}  /* end of clientstat */
+
+#if	defined(CRAY2) && defined(UNICOS5)
+	void
+termstat()
+{
+	needtermstat = 1;
+}
+
+	void
+_termstat()
+{
+	needtermstat = 0;
+	init_termbuf();
+	localstat();
+	rcv_ioctl();
+}
+#endif	/* defined(CRAY2) && defined(UNICOS5) */
+
+#ifdef	LINEMODE
+/*
+ * defer_terminit
+ *
+ * Some things should not be done until after the login process has started
+ * and all the pty modes are set to what they are supposed to be.  This
+ * function is called when the pty state has been processed for the first time.
+ * It calls other functions that do things that were deferred in each module.
+ */
+	void
+defer_terminit()
+{
+
+	/*
+	 * local stuff that got deferred.
+	 */
+	if (def_tspeed != -1) {
+		clientstat(TELOPT_TSPEED, def_tspeed, def_rspeed);
+		def_tspeed = def_rspeed = 0;
+	}
+
+#ifdef	TIOCSWINSZ
+	if (def_col || def_row) {
+		struct winsize ws;
+
+		memset((char *)&ws, 0, sizeof(ws));
+		ws.ws_col = def_col;
+		ws.ws_row = def_row;
+		(void) ioctl(pty, TIOCSWINSZ, (char *)&ws);
+	}
+#endif
+
+	/*
+	 * The only other module that currently defers anything.
+	 */
+	deferslc();
+
+}  /* end of defer_terminit */
+
+/*
+ * terminit
+ *
+ * Returns true if the pty state has been processed yet.
+ */
+	int
+terminit()
+{
+	return(_terminit);
+
+}  /* end of terminit */
+#endif	/* LINEMODE */
diff --git a/contrib/telnet/telnetd/utility.c b/contrib/telnet/telnetd/utility.c
new file mode 100644
index 0000000..9553d58
--- /dev/null
+++ b/contrib/telnet/telnetd/utility.c
@@ -0,0 +1,1192 @@
+/*
+ * Copyright (c) 1989, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef lint
+static char sccsid[] = "@(#)utility.c	8.4 (Berkeley) 5/30/95";
+#endif /* not lint */
+
+#define PRINTOPTIONS
+#include "telnetd.h"
+
+/*
+ * utility functions performing io related tasks
+ */
+
+/*
+ * ttloop
+ *
+ *	A small subroutine to flush the network output buffer, get some data
+ * from the network, and pass it through the telnet state machine.  We
+ * also flush the pty input buffer (by dropping its data) if it becomes
+ * too full.
+ */
+
+    void
+ttloop()
+{
+    void netflush();
+
+    DIAG(TD_REPORT, {sprintf(nfrontp, "td: ttloop\r\n");
+		     nfrontp += strlen(nfrontp);});
+    if (nfrontp-nbackp) {
+	netflush();
+    }
+    ncc = read(net, netibuf, sizeof netibuf);
+    if (ncc < 0) {
+	syslog(LOG_INFO, "ttloop:  read: %m\n");
+	exit(1);
+    } else if (ncc == 0) {
+	syslog(LOG_INFO, "ttloop:  peer died: %m\n");
+	exit(1);
+    }
+    DIAG(TD_REPORT, {sprintf(nfrontp, "td: ttloop read %d chars\r\n", ncc);
+		     nfrontp += strlen(nfrontp);});
+    netip = netibuf;
+    telrcv();			/* state machine */
+    if (ncc > 0) {
+	pfrontp = pbackp = ptyobuf;
+	telrcv();
+    }
+}  /* end of ttloop */
+
+/*
+ * Check a descriptor to see if out of band data exists on it.
+ */
+    int
+stilloob(s)
+    int	s;		/* socket number */
+{
+    static struct timeval timeout = { 0 };
+    fd_set	excepts;
+    int value;
+
+    do {
+	FD_ZERO(&excepts);
+	FD_SET(s, &excepts);
+	value = select(s+1, (fd_set *)0, (fd_set *)0, &excepts, &timeout);
+    } while ((value == -1) && (errno == EINTR));
+
+    if (value < 0) {
+	fatalperror(pty, "select");
+    }
+    if (FD_ISSET(s, &excepts)) {
+	return 1;
+    } else {
+	return 0;
+    }
+}
+
+	void
+ptyflush()
+{
+	int n;
+
+	if ((n = pfrontp - pbackp) > 0) {
+		DIAG((TD_REPORT | TD_PTYDATA),
+			{ sprintf(nfrontp, "td: ptyflush %d chars\r\n", n);
+			  nfrontp += strlen(nfrontp); });
+		DIAG(TD_PTYDATA, printdata("pd", pbackp, n));
+		n = write(pty, pbackp, n);
+	}
+	if (n < 0) {
+		if (errno == EWOULDBLOCK || errno == EINTR)
+			return;
+		cleanup(0);
+	}
+	pbackp += n;
+	if (pbackp == pfrontp)
+		pbackp = pfrontp = ptyobuf;
+}
+
+/*
+ * nextitem()
+ *
+ *	Return the address of the next "item" in the TELNET data
+ * stream.  This will be the address of the next character if
+ * the current address is a user data character, or it will
+ * be the address of the character following the TELNET command
+ * if the current address is a TELNET IAC ("I Am a Command")
+ * character.
+ */
+    char *
+nextitem(current)
+    char	*current;
+{
+    if ((*current&0xff) != IAC) {
+	return current+1;
+    }
+    switch (*(current+1)&0xff) {
+    case DO:
+    case DONT:
+    case WILL:
+    case WONT:
+	return current+3;
+    case SB:		/* loop forever looking for the SE */
+	{
+	    register char *look = current+2;
+
+	    for (;;) {
+		if ((*look++&0xff) == IAC) {
+		    if ((*look++&0xff) == SE) {
+			return look;
+		    }
+		}
+	    }
+	}
+    default:
+	return current+2;
+    }
+}  /* end of nextitem */
+
+
+/*
+ * netclear()
+ *
+ *	We are about to do a TELNET SYNCH operation.  Clear
+ * the path to the network.
+ *
+ *	Things are a bit tricky since we may have sent the first
+ * byte or so of a previous TELNET command into the network.
+ * So, we have to scan the network buffer from the beginning
+ * until we are up to where we want to be.
+ *
+ *	A side effect of what we do, just to keep things
+ * simple, is to clear the urgent data pointer.  The principal
+ * caller should be setting the urgent data pointer AFTER calling
+ * us in any case.
+ */
+    void
+netclear()
+{
+    register char *thisitem, *next;
+    char *good;
+#define	wewant(p)	((nfrontp > p) && ((*p&0xff) == IAC) && \
+				((*(p+1)&0xff) != EC) && ((*(p+1)&0xff) != EL))
+
+#ifdef	ENCRYPTION
+    thisitem = nclearto > netobuf ? nclearto : netobuf;
+#else	/* ENCRYPTION */
+    thisitem = netobuf;
+#endif	/* ENCRYPTION */
+
+    while ((next = nextitem(thisitem)) <= nbackp) {
+	thisitem = next;
+    }
+
+    /* Now, thisitem is first before/at boundary. */
+
+#ifdef	ENCRYPTION
+    good = nclearto > netobuf ? nclearto : netobuf;
+#else	/* ENCRYPTION */
+    good = netobuf;	/* where the good bytes go */
+#endif	/* ENCRYPTION */
+
+    while (nfrontp > thisitem) {
+	if (wewant(thisitem)) {
+	    int length;
+
+	    next = thisitem;
+	    do {
+		next = nextitem(next);
+	    } while (wewant(next) && (nfrontp > next));
+	    length = next-thisitem;
+	    memmove(good, thisitem, length);
+	    good += length;
+	    thisitem = next;
+	} else {
+	    thisitem = nextitem(thisitem);
+	}
+    }
+
+    nbackp = netobuf;
+    nfrontp = good;		/* next byte to be sent */
+    neturg = 0;
+}  /* end of netclear */
+
+/*
+ *  netflush
+ *		Send as much data as possible to the network,
+ *	handling requests for urgent data.
+ */
+    void
+netflush()
+{
+    int n;
+    extern int not42;
+
+    if ((n = nfrontp - nbackp) > 0) {
+	DIAG(TD_REPORT,
+	    { sprintf(nfrontp, "td: netflush %d chars\r\n", n);
+	      n += strlen(nfrontp);  /* get count first */
+	      nfrontp += strlen(nfrontp);  /* then move pointer */
+	    });
+#ifdef	ENCRYPTION
+	if (encrypt_output) {
+		char *s = nclearto ? nclearto : nbackp;
+		if (nfrontp - s > 0) {
+			(*encrypt_output)((unsigned char *)s, nfrontp-s);
+			nclearto = nfrontp;
+		}
+	}
+#endif	/* ENCRYPTION */
+	/*
+	 * if no urgent data, or if the other side appears to be an
+	 * old 4.2 client (and thus unable to survive TCP urgent data),
+	 * write the entire buffer in non-OOB mode.
+	 */
+	if ((neturg == 0) || (not42 == 0)) {
+	    n = write(net, nbackp, n);	/* normal write */
+	} else {
+	    n = neturg - nbackp;
+	    /*
+	     * In 4.2 (and 4.3) systems, there is some question about
+	     * what byte in a sendOOB operation is the "OOB" data.
+	     * To make ourselves compatible, we only send ONE byte
+	     * out of band, the one WE THINK should be OOB (though
+	     * we really have more the TCP philosophy of urgent data
+	     * rather than the Unix philosophy of OOB data).
+	     */
+	    if (n > 1) {
+		n = send(net, nbackp, n-1, 0);	/* send URGENT all by itself */
+	    } else {
+		n = send(net, nbackp, n, MSG_OOB);	/* URGENT data */
+	    }
+	}
+    }
+    if (n < 0) {
+	if (errno == EWOULDBLOCK || errno == EINTR)
+		return;
+	cleanup(0);
+    }
+    nbackp += n;
+#ifdef	ENCRYPTION
+    if (nbackp > nclearto)
+	nclearto = 0;
+#endif	/* ENCRYPTION */
+    if (nbackp >= neturg) {
+	neturg = 0;
+    }
+    if (nbackp == nfrontp) {
+	nbackp = nfrontp = netobuf;
+#ifdef	ENCRYPTION
+	nclearto = 0;
+#endif	/* ENCRYPTION */
+    }
+    return;
+}  /* end of netflush */
+
+
+/*
+ * writenet
+ *
+ * Just a handy little function to write a bit of raw data to the net.
+ * It will force a transmit of the buffer if necessary
+ *
+ * arguments
+ *    ptr - A pointer to a character string to write
+ *    len - How many bytes to write
+ */
+	void
+writenet(ptr, len)
+	register unsigned char *ptr;
+	register int len;
+{
+	/* flush buffer if no room for new data) */
+	if ((&netobuf[BUFSIZ] - nfrontp) < len) {
+		/* if this fails, don't worry, buffer is a little big */
+		netflush();
+	}
+
+	memmove(nfrontp, ptr, len);
+	nfrontp += len;
+
+}  /* end of writenet */
+
+
+/*
+ * miscellaneous functions doing a variety of little jobs follow ...
+ */
+
+
+	void
+fatal(f, msg)
+	int f;
+	char *msg;
+{
+	char buf[BUFSIZ];
+
+	(void) sprintf(buf, "telnetd: %s.\r\n", msg);
+#ifdef	ENCRYPTION
+	if (encrypt_output) {
+		/*
+		 * Better turn off encryption first....
+		 * Hope it flushes...
+		 */
+		encrypt_send_end();
+		netflush();
+	}
+#endif	/* ENCRYPTION */
+	(void) write(f, buf, (int)strlen(buf));
+	sleep(1);	/*XXX*/
+	exit(1);
+}
+
+	void
+fatalperror(f, msg)
+	int f;
+	char *msg;
+{
+	char buf[BUFSIZ], *strerror();
+
+	(void) sprintf(buf, "%s: %s", msg, strerror(errno));
+	fatal(f, buf);
+}
+
+char editedhost[32];
+
+	void
+edithost(pat, host)
+	register char *pat;
+	register char *host;
+{
+	register char *res = editedhost;
+	char *strncpy();
+
+	if (!pat)
+		pat = "";
+	while (*pat) {
+		switch (*pat) {
+
+		case '#':
+			if (*host)
+				host++;
+			break;
+
+		case '@':
+			if (*host)
+				*res++ = *host++;
+			break;
+
+		default:
+			*res++ = *pat;
+			break;
+		}
+		if (res == &editedhost[sizeof editedhost - 1]) {
+			*res = '\0';
+			return;
+		}
+		pat++;
+	}
+	if (*host)
+		(void) strncpy(res, host,
+				sizeof editedhost - (res - editedhost) -1);
+	else
+		*res = '\0';
+	editedhost[sizeof editedhost - 1] = '\0';
+}
+
+static char *putlocation;
+
+	void
+putstr(s)
+	register char *s;
+{
+
+	while (*s)
+		putchr(*s++);
+}
+
+	void
+putchr(cc)
+	int cc;
+{
+	*putlocation++ = cc;
+}
+
+/*
+ * This is split on two lines so that SCCS will not see the M
+ * between two % signs and expand it...
+ */
+static char fmtstr[] = { "%l:%M\
+%P on %A, %d %B %Y" };
+
+	void
+putf(cp, where)
+	register char *cp;
+	char *where;
+{
+	char *slash;
+	time_t t;
+	char db[100];
+#ifdef	STREAMSPTY
+	extern char *strchr();
+#else
+	extern char *strrchr();
+#endif
+
+	putlocation = where;
+
+	while (*cp) {
+		if (*cp != '%') {
+			putchr(*cp++);
+			continue;
+		}
+		switch (*++cp) {
+
+		case 't':
+#ifdef	STREAMSPTY
+			/* names are like /dev/pts/2 -- we want pts/2 */
+			slash = strchr(line+1, '/');
+#else
+			slash = strrchr(line, '/');
+#endif
+			if (slash == (char *) 0)
+				putstr(line);
+			else
+				putstr(&slash[1]);
+			break;
+
+		case 'h':
+			putstr(editedhost);
+			break;
+
+		case 'd':
+			(void)time(&t);
+			(void)strftime(db, sizeof(db), fmtstr, localtime(&t));
+			putstr(db);
+			break;
+
+		case '%':
+			putchr('%');
+			break;
+		}
+		cp++;
+	}
+}
+
+#ifdef DIAGNOSTICS
+/*
+ * Print telnet options and commands in plain text, if possible.
+ */
+	void
+printoption(fmt, option)
+	register char *fmt;
+	register int option;
+{
+	if (TELOPT_OK(option))
+		sprintf(nfrontp, "%s %s\r\n", fmt, TELOPT(option));
+	else if (TELCMD_OK(option))
+		sprintf(nfrontp, "%s %s\r\n", fmt, TELCMD(option));
+	else
+		sprintf(nfrontp, "%s %d\r\n", fmt, option);
+	nfrontp += strlen(nfrontp);
+	return;
+}
+
+    void
+printsub(direction, pointer, length)
+    char		direction;	/* '<' or '>' */
+    unsigned char	*pointer;	/* where suboption data sits */
+    int			length;		/* length of suboption data */
+{
+    register int i;
+    char buf[512];
+
+	if (!(diagnostic & TD_OPTIONS))
+		return;
+
+	if (direction) {
+	    sprintf(nfrontp, "td: %s suboption ",
+					direction == '<' ? "recv" : "send");
+	    nfrontp += strlen(nfrontp);
+	    if (length >= 3) {
+		register int j;
+
+		i = pointer[length-2];
+		j = pointer[length-1];
+
+		if (i != IAC || j != SE) {
+		    sprintf(nfrontp, "(terminated by ");
+		    nfrontp += strlen(nfrontp);
+		    if (TELOPT_OK(i))
+			sprintf(nfrontp, "%s ", TELOPT(i));
+		    else if (TELCMD_OK(i))
+			sprintf(nfrontp, "%s ", TELCMD(i));
+		    else
+			sprintf(nfrontp, "%d ", i);
+		    nfrontp += strlen(nfrontp);
+		    if (TELOPT_OK(j))
+			sprintf(nfrontp, "%s", TELOPT(j));
+		    else if (TELCMD_OK(j))
+			sprintf(nfrontp, "%s", TELCMD(j));
+		    else
+			sprintf(nfrontp, "%d", j);
+		    nfrontp += strlen(nfrontp);
+		    sprintf(nfrontp, ", not IAC SE!) ");
+		    nfrontp += strlen(nfrontp);
+		}
+	    }
+	    length -= 2;
+	}
+	if (length < 1) {
+	    sprintf(nfrontp, "(Empty suboption??\?)");
+	    nfrontp += strlen(nfrontp);
+	    return;
+	}
+	switch (pointer[0]) {
+	case TELOPT_TTYPE:
+	    sprintf(nfrontp, "TERMINAL-TYPE ");
+	    nfrontp += strlen(nfrontp);
+	    switch (pointer[1]) {
+	    case TELQUAL_IS:
+		sprintf(nfrontp, "IS \"%.*s\"", length-2, (char *)pointer+2);
+		break;
+	    case TELQUAL_SEND:
+		sprintf(nfrontp, "SEND");
+		break;
+	    default:
+		sprintf(nfrontp,
+				"- unknown qualifier %d (0x%x).",
+				pointer[1], pointer[1]);
+	    }
+	    nfrontp += strlen(nfrontp);
+	    break;
+	case TELOPT_TSPEED:
+	    sprintf(nfrontp, "TERMINAL-SPEED");
+	    nfrontp += strlen(nfrontp);
+	    if (length < 2) {
+		sprintf(nfrontp, " (empty suboption??\?)");
+		nfrontp += strlen(nfrontp);
+		break;
+	    }
+	    switch (pointer[1]) {
+	    case TELQUAL_IS:
+		sprintf(nfrontp, " IS %.*s", length-2, (char *)pointer+2);
+		nfrontp += strlen(nfrontp);
+		break;
+	    default:
+		if (pointer[1] == 1)
+		    sprintf(nfrontp, " SEND");
+		else
+		    sprintf(nfrontp, " %d (unknown)", pointer[1]);
+		nfrontp += strlen(nfrontp);
+		for (i = 2; i < length; i++) {
+		    sprintf(nfrontp, " ?%d?", pointer[i]);
+		    nfrontp += strlen(nfrontp);
+		}
+		break;
+	    }
+	    break;
+
+	case TELOPT_LFLOW:
+	    sprintf(nfrontp, "TOGGLE-FLOW-CONTROL");
+	    nfrontp += strlen(nfrontp);
+	    if (length < 2) {
+		sprintf(nfrontp, " (empty suboption??\?)");
+		nfrontp += strlen(nfrontp);
+		break;
+	    }
+	    switch (pointer[1]) {
+	    case LFLOW_OFF:
+		sprintf(nfrontp, " OFF"); break;
+	    case LFLOW_ON:
+		sprintf(nfrontp, " ON"); break;
+	    case LFLOW_RESTART_ANY:
+		sprintf(nfrontp, " RESTART-ANY"); break;
+	    case LFLOW_RESTART_XON:
+		sprintf(nfrontp, " RESTART-XON"); break;
+	    default:
+		sprintf(nfrontp, " %d (unknown)", pointer[1]);
+	    }
+	    nfrontp += strlen(nfrontp);
+	    for (i = 2; i < length; i++) {
+		sprintf(nfrontp, " ?%d?", pointer[i]);
+		nfrontp += strlen(nfrontp);
+	    }
+	    break;
+
+	case TELOPT_NAWS:
+	    sprintf(nfrontp, "NAWS");
+	    nfrontp += strlen(nfrontp);
+	    if (length < 2) {
+		sprintf(nfrontp, " (empty suboption??\?)");
+		nfrontp += strlen(nfrontp);
+		break;
+	    }
+	    if (length == 2) {
+		sprintf(nfrontp, " ?%d?", pointer[1]);
+		nfrontp += strlen(nfrontp);
+		break;
+	    }
+	    sprintf(nfrontp, " %d %d (%d)",
+		pointer[1], pointer[2],
+		(int)((((unsigned int)pointer[1])<<8)|((unsigned int)pointer[2])));
+	    nfrontp += strlen(nfrontp);
+	    if (length == 4) {
+		sprintf(nfrontp, " ?%d?", pointer[3]);
+		nfrontp += strlen(nfrontp);
+		break;
+	    }
+	    sprintf(nfrontp, " %d %d (%d)",
+		pointer[3], pointer[4],
+		(int)((((unsigned int)pointer[3])<<8)|((unsigned int)pointer[4])));
+	    nfrontp += strlen(nfrontp);
+	    for (i = 5; i < length; i++) {
+		sprintf(nfrontp, " ?%d?", pointer[i]);
+		nfrontp += strlen(nfrontp);
+	    }
+	    break;
+
+	case TELOPT_LINEMODE:
+	    sprintf(nfrontp, "LINEMODE ");
+	    nfrontp += strlen(nfrontp);
+	    if (length < 2) {
+		sprintf(nfrontp, " (empty suboption??\?)");
+		nfrontp += strlen(nfrontp);
+		break;
+	    }
+	    switch (pointer[1]) {
+	    case WILL:
+		sprintf(nfrontp, "WILL ");
+		goto common;
+	    case WONT:
+		sprintf(nfrontp, "WONT ");
+		goto common;
+	    case DO:
+		sprintf(nfrontp, "DO ");
+		goto common;
+	    case DONT:
+		sprintf(nfrontp, "DONT ");
+	    common:
+		nfrontp += strlen(nfrontp);
+		if (length < 3) {
+		    sprintf(nfrontp, "(no option??\?)");
+		    nfrontp += strlen(nfrontp);
+		    break;
+		}
+		switch (pointer[2]) {
+		case LM_FORWARDMASK:
+		    sprintf(nfrontp, "Forward Mask");
+		    nfrontp += strlen(nfrontp);
+		    for (i = 3; i < length; i++) {
+			sprintf(nfrontp, " %x", pointer[i]);
+			nfrontp += strlen(nfrontp);
+		    }
+		    break;
+		default:
+		    sprintf(nfrontp, "%d (unknown)", pointer[2]);
+		    nfrontp += strlen(nfrontp);
+		    for (i = 3; i < length; i++) {
+			sprintf(nfrontp, " %d", pointer[i]);
+			nfrontp += strlen(nfrontp);
+		    }
+		    break;
+		}
+		break;
+
+	    case LM_SLC:
+		sprintf(nfrontp, "SLC");
+		nfrontp += strlen(nfrontp);
+		for (i = 2; i < length - 2; i += 3) {
+		    if (SLC_NAME_OK(pointer[i+SLC_FUNC]))
+			sprintf(nfrontp, " %s", SLC_NAME(pointer[i+SLC_FUNC]));
+		    else
+			sprintf(nfrontp, " %d", pointer[i+SLC_FUNC]);
+		    nfrontp += strlen(nfrontp);
+		    switch (pointer[i+SLC_FLAGS]&SLC_LEVELBITS) {
+		    case SLC_NOSUPPORT:
+			sprintf(nfrontp, " NOSUPPORT"); break;
+		    case SLC_CANTCHANGE:
+			sprintf(nfrontp, " CANTCHANGE"); break;
+		    case SLC_VARIABLE:
+			sprintf(nfrontp, " VARIABLE"); break;
+		    case SLC_DEFAULT:
+			sprintf(nfrontp, " DEFAULT"); break;
+		    }
+		    nfrontp += strlen(nfrontp);
+		    sprintf(nfrontp, "%s%s%s",
+			pointer[i+SLC_FLAGS]&SLC_ACK ? "|ACK" : "",
+			pointer[i+SLC_FLAGS]&SLC_FLUSHIN ? "|FLUSHIN" : "",
+			pointer[i+SLC_FLAGS]&SLC_FLUSHOUT ? "|FLUSHOUT" : "");
+		    nfrontp += strlen(nfrontp);
+		    if (pointer[i+SLC_FLAGS]& ~(SLC_ACK|SLC_FLUSHIN|
+						SLC_FLUSHOUT| SLC_LEVELBITS)) {
+			sprintf(nfrontp, "(0x%x)", pointer[i+SLC_FLAGS]);
+			nfrontp += strlen(nfrontp);
+		    }
+		    sprintf(nfrontp, " %d;", pointer[i+SLC_VALUE]);
+		    nfrontp += strlen(nfrontp);
+		    if ((pointer[i+SLC_VALUE] == IAC) &&
+			(pointer[i+SLC_VALUE+1] == IAC))
+				i++;
+		}
+		for (; i < length; i++) {
+		    sprintf(nfrontp, " ?%d?", pointer[i]);
+		    nfrontp += strlen(nfrontp);
+		}
+		break;
+
+	    case LM_MODE:
+		sprintf(nfrontp, "MODE ");
+		nfrontp += strlen(nfrontp);
+		if (length < 3) {
+		    sprintf(nfrontp, "(no mode??\?)");
+		    nfrontp += strlen(nfrontp);
+		    break;
+		}
+		{
+		    char tbuf[32];
+		    sprintf(tbuf, "%s%s%s%s%s",
+			pointer[2]&MODE_EDIT ? "|EDIT" : "",
+			pointer[2]&MODE_TRAPSIG ? "|TRAPSIG" : "",
+			pointer[2]&MODE_SOFT_TAB ? "|SOFT_TAB" : "",
+			pointer[2]&MODE_LIT_ECHO ? "|LIT_ECHO" : "",
+			pointer[2]&MODE_ACK ? "|ACK" : "");
+		    sprintf(nfrontp, "%s", tbuf[1] ? &tbuf[1] : "0");
+		    nfrontp += strlen(nfrontp);
+		}
+		if (pointer[2]&~(MODE_EDIT|MODE_TRAPSIG|MODE_ACK)) {
+		    sprintf(nfrontp, " (0x%x)", pointer[2]);
+		    nfrontp += strlen(nfrontp);
+		}
+		for (i = 3; i < length; i++) {
+		    sprintf(nfrontp, " ?0x%x?", pointer[i]);
+		    nfrontp += strlen(nfrontp);
+		}
+		break;
+	    default:
+		sprintf(nfrontp, "%d (unknown)", pointer[1]);
+		nfrontp += strlen(nfrontp);
+		for (i = 2; i < length; i++) {
+		    sprintf(nfrontp, " %d", pointer[i]);
+		    nfrontp += strlen(nfrontp);
+		}
+	    }
+	    break;
+
+	case TELOPT_STATUS: {
+	    register char *cp;
+	    register int j, k;
+
+	    sprintf(nfrontp, "STATUS");
+	    nfrontp += strlen(nfrontp);
+
+	    switch (pointer[1]) {
+	    default:
+		if (pointer[1] == TELQUAL_SEND)
+		    sprintf(nfrontp, " SEND");
+		else
+		    sprintf(nfrontp, " %d (unknown)", pointer[1]);
+		nfrontp += strlen(nfrontp);
+		for (i = 2; i < length; i++) {
+		    sprintf(nfrontp, " ?%d?", pointer[i]);
+		    nfrontp += strlen(nfrontp);
+		}
+		break;
+	    case TELQUAL_IS:
+		sprintf(nfrontp, " IS\r\n");
+		nfrontp += strlen(nfrontp);
+
+		for (i = 2; i < length; i++) {
+		    switch(pointer[i]) {
+		    case DO:	cp = "DO"; goto common2;
+		    case DONT:	cp = "DONT"; goto common2;
+		    case WILL:	cp = "WILL"; goto common2;
+		    case WONT:	cp = "WONT"; goto common2;
+		    common2:
+			i++;
+			if (TELOPT_OK(pointer[i]))
+			    sprintf(nfrontp, " %s %s", cp, TELOPT(pointer[i]));
+			else
+			    sprintf(nfrontp, " %s %d", cp, pointer[i]);
+			nfrontp += strlen(nfrontp);
+
+			sprintf(nfrontp, "\r\n");
+			nfrontp += strlen(nfrontp);
+			break;
+
+		    case SB:
+			sprintf(nfrontp, " SB ");
+			nfrontp += strlen(nfrontp);
+			i++;
+			j = k = i;
+			while (j < length) {
+			    if (pointer[j] == SE) {
+				if (j+1 == length)
+				    break;
+				if (pointer[j+1] == SE)
+				    j++;
+				else
+				    break;
+			    }
+			    pointer[k++] = pointer[j++];
+			}
+			printsub(0, &pointer[i], k - i);
+			if (i < length) {
+			    sprintf(nfrontp, " SE");
+			    nfrontp += strlen(nfrontp);
+			    i = j;
+			} else
+			    i = j - 1;
+
+			sprintf(nfrontp, "\r\n");
+			nfrontp += strlen(nfrontp);
+
+			break;
+
+		    default:
+			sprintf(nfrontp, " %d", pointer[i]);
+			nfrontp += strlen(nfrontp);
+			break;
+		    }
+		}
+		break;
+	    }
+	    break;
+	  }
+
+	case TELOPT_XDISPLOC:
+	    sprintf(nfrontp, "X-DISPLAY-LOCATION ");
+	    nfrontp += strlen(nfrontp);
+	    switch (pointer[1]) {
+	    case TELQUAL_IS:
+		sprintf(nfrontp, "IS \"%.*s\"", length-2, (char *)pointer+2);
+		break;
+	    case TELQUAL_SEND:
+		sprintf(nfrontp, "SEND");
+		break;
+	    default:
+		sprintf(nfrontp, "- unknown qualifier %d (0x%x).",
+				pointer[1], pointer[1]);
+	    }
+	    nfrontp += strlen(nfrontp);
+	    break;
+
+	case TELOPT_NEW_ENVIRON:
+	    sprintf(nfrontp, "NEW-ENVIRON ");
+	    goto env_common1;
+	case TELOPT_OLD_ENVIRON:
+	    sprintf(nfrontp, "OLD-ENVIRON");
+	env_common1:
+	    nfrontp += strlen(nfrontp);
+	    switch (pointer[1]) {
+	    case TELQUAL_IS:
+		sprintf(nfrontp, "IS ");
+		goto env_common;
+	    case TELQUAL_SEND:
+		sprintf(nfrontp, "SEND ");
+		goto env_common;
+	    case TELQUAL_INFO:
+		sprintf(nfrontp, "INFO ");
+	    env_common:
+		nfrontp += strlen(nfrontp);
+		{
+		    register int noquote = 2;
+		    for (i = 2; i < length; i++ ) {
+			switch (pointer[i]) {
+			case NEW_ENV_VAR:
+			    sprintf(nfrontp, "\" VAR " + noquote);
+			    nfrontp += strlen(nfrontp);
+			    noquote = 2;
+			    break;
+
+			case NEW_ENV_VALUE:
+			    sprintf(nfrontp, "\" VALUE " + noquote);
+			    nfrontp += strlen(nfrontp);
+			    noquote = 2;
+			    break;
+
+			case ENV_ESC:
+			    sprintf(nfrontp, "\" ESC " + noquote);
+			    nfrontp += strlen(nfrontp);
+			    noquote = 2;
+			    break;
+
+			case ENV_USERVAR:
+			    sprintf(nfrontp, "\" USERVAR " + noquote);
+			    nfrontp += strlen(nfrontp);
+			    noquote = 2;
+			    break;
+
+			default:
+			def_case:
+			    if (isprint(pointer[i]) && pointer[i] != '"') {
+				if (noquote) {
+				    *nfrontp++ = '"';
+				    noquote = 0;
+				}
+				*nfrontp++ = pointer[i];
+			    } else {
+				sprintf(nfrontp, "\" %03o " + noquote,
+							pointer[i]);
+				nfrontp += strlen(nfrontp);
+				noquote = 2;
+			    }
+			    break;
+			}
+		    }
+		    if (!noquote)
+			*nfrontp++ = '"';
+		    break;
+		}
+	    }
+	    break;
+
+#if	defined(AUTHENTICATION)
+	case TELOPT_AUTHENTICATION:
+	    sprintf(nfrontp, "AUTHENTICATION");
+	    nfrontp += strlen(nfrontp);
+
+	    if (length < 2) {
+		sprintf(nfrontp, " (empty suboption??\?)");
+		nfrontp += strlen(nfrontp);
+		break;
+	    }
+	    switch (pointer[1]) {
+	    case TELQUAL_REPLY:
+	    case TELQUAL_IS:
+		sprintf(nfrontp, " %s ", (pointer[1] == TELQUAL_IS) ?
+							"IS" : "REPLY");
+		nfrontp += strlen(nfrontp);
+		if (AUTHTYPE_NAME_OK(pointer[2]))
+		    sprintf(nfrontp, "%s ", AUTHTYPE_NAME(pointer[2]));
+		else
+		    sprintf(nfrontp, "%d ", pointer[2]);
+		nfrontp += strlen(nfrontp);
+		if (length < 3) {
+		    sprintf(nfrontp, "(partial suboption??\?)");
+		    nfrontp += strlen(nfrontp);
+		    break;
+		}
+		sprintf(nfrontp, "%s|%s",
+			((pointer[3] & AUTH_WHO_MASK) == AUTH_WHO_CLIENT) ?
+			"CLIENT" : "SERVER",
+			((pointer[3] & AUTH_HOW_MASK) == AUTH_HOW_MUTUAL) ?
+			"MUTUAL" : "ONE-WAY");
+		nfrontp += strlen(nfrontp);
+
+		auth_printsub(&pointer[1], length - 1, buf, sizeof(buf));
+		sprintf(nfrontp, "%s", buf);
+		nfrontp += strlen(nfrontp);
+		break;
+
+	    case TELQUAL_SEND:
+		i = 2;
+		sprintf(nfrontp, " SEND ");
+		nfrontp += strlen(nfrontp);
+		while (i < length) {
+		    if (AUTHTYPE_NAME_OK(pointer[i]))
+			sprintf(nfrontp, "%s ", AUTHTYPE_NAME(pointer[i]));
+		    else
+			sprintf(nfrontp, "%d ", pointer[i]);
+		    nfrontp += strlen(nfrontp);
+		    if (++i >= length) {
+			sprintf(nfrontp, "(partial suboption??\?)");
+			nfrontp += strlen(nfrontp);
+			break;
+		    }
+		    sprintf(nfrontp, "%s|%s ",
+			((pointer[i] & AUTH_WHO_MASK) == AUTH_WHO_CLIENT) ?
+							"CLIENT" : "SERVER",
+			((pointer[i] & AUTH_HOW_MASK) == AUTH_HOW_MUTUAL) ?
+							"MUTUAL" : "ONE-WAY");
+		    nfrontp += strlen(nfrontp);
+		    ++i;
+		}
+		break;
+
+	    case TELQUAL_NAME:
+		i = 2;
+		sprintf(nfrontp, " NAME \"");
+		nfrontp += strlen(nfrontp);
+		while (i < length)
+		    *nfrontp += pointer[i++];
+		*nfrontp += '"';
+		break;
+
+	    default:
+		    for (i = 2; i < length; i++) {
+			sprintf(nfrontp, " ?%d?", pointer[i]);
+			nfrontp += strlen(nfrontp);
+		    }
+		    break;
+	    }
+	    break;
+#endif
+
+#ifdef	ENCRYPTION
+	case TELOPT_ENCRYPT:
+	    sprintf(nfrontp, "ENCRYPT");
+	    nfrontp += strlen(nfrontp);
+	    if (length < 2) {
+		sprintf(nfrontp, " (empty suboption??\?)");
+		nfrontp += strlen(nfrontp);
+		break;
+	    }
+	    switch (pointer[1]) {
+	    case ENCRYPT_START:
+		sprintf(nfrontp, " START");
+		nfrontp += strlen(nfrontp);
+		break;
+
+	    case ENCRYPT_END:
+		sprintf(nfrontp, " END");
+		nfrontp += strlen(nfrontp);
+		break;
+
+	    case ENCRYPT_REQSTART:
+		sprintf(nfrontp, " REQUEST-START");
+		nfrontp += strlen(nfrontp);
+		break;
+
+	    case ENCRYPT_REQEND:
+		sprintf(nfrontp, " REQUEST-END");
+		nfrontp += strlen(nfrontp);
+		break;
+
+	    case ENCRYPT_IS:
+	    case ENCRYPT_REPLY:
+		sprintf(nfrontp, " %s ", (pointer[1] == ENCRYPT_IS) ?
+							"IS" : "REPLY");
+		nfrontp += strlen(nfrontp);
+		if (length < 3) {
+		    sprintf(nfrontp, " (partial suboption??\?)");
+		    nfrontp += strlen(nfrontp);
+		    break;
+		}
+		if (ENCTYPE_NAME_OK(pointer[2]))
+		    sprintf(nfrontp, "%s ", ENCTYPE_NAME(pointer[2]));
+		else
+		    sprintf(nfrontp, " %d (unknown)", pointer[2]);
+		nfrontp += strlen(nfrontp);
+
+		encrypt_printsub(&pointer[1], length - 1, buf, sizeof(buf));
+		sprintf(nfrontp, "%s", buf);
+		nfrontp += strlen(nfrontp);
+		break;
+
+	    case ENCRYPT_SUPPORT:
+		i = 2;
+		sprintf(nfrontp, " SUPPORT ");
+		nfrontp += strlen(nfrontp);
+		while (i < length) {
+		    if (ENCTYPE_NAME_OK(pointer[i]))
+			sprintf(nfrontp, "%s ", ENCTYPE_NAME(pointer[i]));
+		    else
+			sprintf(nfrontp, "%d ", pointer[i]);
+		    nfrontp += strlen(nfrontp);
+		    i++;
+		}
+		break;
+
+	    case ENCRYPT_ENC_KEYID:
+		sprintf(nfrontp, " ENC_KEYID", pointer[1]);
+		nfrontp += strlen(nfrontp);
+		goto encommon;
+
+	    case ENCRYPT_DEC_KEYID:
+		sprintf(nfrontp, " DEC_KEYID", pointer[1]);
+		nfrontp += strlen(nfrontp);
+		goto encommon;
+
+	    default:
+		sprintf(nfrontp, " %d (unknown)", pointer[1]);
+		nfrontp += strlen(nfrontp);
+	    encommon:
+		for (i = 2; i < length; i++) {
+		    sprintf(nfrontp, " %d", pointer[i]);
+		    nfrontp += strlen(nfrontp);
+		}
+		break;
+	    }
+	    break;
+#endif	/* ENCRYPTION */
+
+	default:
+	    if (TELOPT_OK(pointer[0]))
+		sprintf(nfrontp, "%s (unknown)", TELOPT(pointer[0]));
+	    else
+		sprintf(nfrontp, "%d (unknown)", pointer[i]);
+	    nfrontp += strlen(nfrontp);
+	    for (i = 1; i < length; i++) {
+		sprintf(nfrontp, " %d", pointer[i]);
+		nfrontp += strlen(nfrontp);
+	    }
+	    break;
+	}
+	sprintf(nfrontp, "\r\n");
+	nfrontp += strlen(nfrontp);
+}
+
+/*
+ * Dump a data buffer in hex and ascii to the output data stream.
+ */
+	void
+printdata(tag, ptr, cnt)
+	register char *tag;
+	register char *ptr;
+	register int cnt;
+{
+	register int i;
+	char xbuf[30];
+
+	while (cnt) {
+		/* flush net output buffer if no room for new data) */
+		if ((&netobuf[BUFSIZ] - nfrontp) < 80) {
+			netflush();
+		}
+
+		/* add a line of output */
+		sprintf(nfrontp, "%s: ", tag);
+		nfrontp += strlen(nfrontp);
+		for (i = 0; i < 20 && cnt; i++) {
+			sprintf(nfrontp, "%02x", *ptr);
+			nfrontp += strlen(nfrontp);
+			if (isprint(*ptr)) {
+				xbuf[i] = *ptr;
+			} else {
+				xbuf[i] = '.';
+			}
+			if (i % 2) {
+				*nfrontp = ' ';
+				nfrontp++;
+			}
+			cnt--;
+			ptr++;
+		}
+		xbuf[i] = '\0';
+		sprintf(nfrontp, " %s\r\n", xbuf );
+		nfrontp += strlen(nfrontp);
+	}
+}
+#endif /* DIAGNOSTICS */