Cronyx/Sigma sync/async serial driver with PPP support

from Serge Vakulenko

3 files changed, 1005 insertions, 0 deletions

diff --git a/sbin/cxconfig/Makefile b/sbin/cxconfig/Makefile
new file mode 100644
index 0000000..59c828d
--- /dev/null
+++ b/sbin/cxconfig/Makefile
@@ -0,0 +1,4 @@
+PROG = cxconfig
+MAN8 = cxconfig.8
+
+.include <bsd.prog.mk>
diff --git a/sbin/cxconfig/cxconfig.8 b/sbin/cxconfig/cxconfig.8
new file mode 100644
index 0000000..9907435
--- /dev/null
+++ b/sbin/cxconfig/cxconfig.8
@@ -0,0 +1,297 @@
+.TH Cronyx-Sigma 1
+.rm ES
+.rm EE
+.de ES
+.PP
+.nf
+.in +0.5i
+..
+.de EE
+.in -0.5i
+.fi
+..
+.na
+.SH NAME
+.B cxconfig
+\- channel options management utility for Cronyx-Sigma adapter
+.SH DESCRIPTION
+.PP
+The \fBcxconfig\fP utility is used for configuring the channel options of
+the Cronyx-Sigma adapter.
+.PP
+To change cha options the channel should be free: the corresponding
+network interface in ``down'' state, the asynchronous terminal device /dev/tty*
+closed.
+Generally, the channel options are set up during the operating
+system startup, for example from the \fI/etc/rc\fP file.
+.PP
+Note, that not all options have a sense for every particular
+case, and an attempt to set some of them can hang up the channel or
+the whole adapter.
+.SH "Usage"
+.IP "cxconfig"
+The brief information about all channels.
+.IP "cxconfig -a"
+The full information about all channels.
+.IP "cxconfig <channel>"
+The brief information about the channel.
+.IP "cxconfig -a <channel>"
+The full information about the channel.
+.IP "cxconfig <channel> <option>..."
+Setting the channel options.
+.SH "Channel options"
+.IP ispeed=#
+Set the receiver baud rate to the number given.
+The maximal value is 256000 bits/sec.
+In the synchronous mode the receiver baud rate is significant
+only when DPLL mode is used.
+.IP ospeed=#
+Set the transmitter baud rate to the number given.
+The maximal value is 256000 bits/sec.
+In the synchronous mode the transmitter baud rate is significant
+only in the case of the internal clock source.
+If receiver and transmitter have equal data rate, then it could
+be set by specifying only the numerical argument.
+.IP async
+Set the asynchronous channel mode.
+.IP "hdlc, bisync, bsc, x.21, x21
+Set the synchronous channel mode: HDLC, Bisync (BSC) or X.21.
+.IP ppp
+Set the link-level protocol: PPP/HDLC.  The built-in simplified synchronous PPP
+implementation is used (see RFC-1548, RFC-1549).
+.IP cisco
+Set the link-level protocol: Cisco/HDLC (see RFC-1547).
+This protocol is intended for compatibility with old models of Cisco routers,
+and with early versions of BSD/386 drivers.
+The extensive usage of this protocol is not recommended.
+.IP ext
+Use the external link-level protocol suite (for BSD/386 only).
+.IP "+keepalive, -keepalive"
+Enable the automatic line state control sub-protocol.
+This setting is not significant when the external link-level protocol is used.
+.IP "+autorts, -autorts"
+Enable the automatic RTS signal control.
+When enabled, the RTS signal goes up only when both halves of
+the receiver ring buffer are free and ready for receive,
+and goes down when one or both buffers are busy.
+.IP "port=rs232, port=rs449, port=v35
+Set the zero channel hardware interface type.
+.SH "Common options"
+.IP "nrz, nrzi, manchester
+Set the data line signal encoding.
+In the case of \fINRZ\fP encoding the zero bit is transmitted by the zero signal
+level, the one bit - by the positive signal level.
+In the case of \fINRZI\fP encoding the zero bit is transmitted by the change of
+the signal level, the one bit - by the constant signal level.
+In the case of \fIManchester\fP encoding the zero bit is encoded as 01 value,
+the one bit - as 10 value.
+.IP "+dpll, -dpll"
+Enable the digital phase locked loop mode (DPLL).
+When enabled, the receiver timing clock signal
+is derived from the received data.
+.IP "+lloop, -lloop"
+Set the local loopback mode.
+.IP "+extclock, -extclock"
+Set the timing clock source of synchronous channels.  There are
+two possible variants: \fIexternal clock\fP source or \fIinternal clock\fP
+generation.
+.br
+\fIExternal clock\fP mode is the most common method for connecting
+external modem hardware.  In this mode the external timing
+signal is received on TXCIN pin of the connector, and it is
+used as a synchronization clock for transmitting data (TXD).
+.br
+In the case of \fIinternal clock\fP mode the transmitted data (TXD)
+are synchronized using the internal on-board timing generator,
+the internally generated timing signal is driven on the TXCOUT
+pin, and the signal on the TXCIN pin is ignored.  This mode
+is used for direct terminal-to-terminal communication,
+e.g. for connecting two computers together in a synchronous mode
+via relatively short cable.  This method should also be used
+for testing channels with an external loopback connector.
+.IP fifo=#
+FIFO threshold level setup for receiver and transmitter.
+.IP rfifo=#
+Hardware RTS/CTS flow control FIFO threshold setup.
+.IP "+ctsup, -ctsup"
+Enable/disable interrupts on CTS (Clear To Send) signal setup (0 to 1 transition).
+.IP "+ctsdown, -ctsdown"
+Enable/disable interrupts on CTS (Clear To Send) signal clear (1 to 0 transition).
+.IP "+cdup, -cdup"
+Enable/disable interrupts on CD (Carrier Detect) signal setup (0 to 1 transition).
+.IP "+cddown, -cddown"
+Enable/disable interrupts on CD (Carrier Detect) signal clear (1 to 0 transition).
+.IP "+dsrup, -dsrup"
+Enable/disable interrupts on DSR (Data Set Ready) signal setup (0 to 1 transition).
+.IP "+dsrdown, -dsrdown"
+Enable/disable interrupts on DSR (Data Set Ready) signal clear (1 to 0 transition).
+.SH "Asynchronous mode options"
+.IP cs#
+Select character size: 5, 6, 7 or 8 bits.
+.IP "parodd, pareven
+Parity mode: odd or even.
+.IP "+ignpar, -ignpar
+Disable/enable parity detection.
+.IP nopar
+Disable parity bit generation.
+.IP forcepar
+Force parity: even - 0, odd - 1.
+.IP "stopb1, stopb1.5, stopb2
+Use 1 or 1.5 or 2 stop bits per character.
+.IP "+dsr, -dsr"
+Use the DSR input signal as receiver enable/disable.
+.IP "+cts, -cts"
+Use the CTS input signal as transmitter enable/disable.
+.IP "+rts, -rts"
+Drive the RTS output signal as transmitter ready.
+.IP "+rloop, -rloop"
+Set the remote loopback mode.
+.IP "+etc, -etc"
+Enable the embedded transmit commands mode.
+.IP "+ixon, -ixon"
+Enable the hardware XON/XOFF flow control support.
+.IP "+ixany, -ixany"
+Use the hardware IXANY mode support.
+.IP "+sdt, -sdt"
+Detect the spec. characters SCHR1 and SCHR2 in the receive data.
+.IP "+flowct, -flowct"
+Receive the flow control spec. characters as data.
+.IP "+rdt, -rdt"
+Detect the spec. characters in range SCRL..SCRH in the receive data.
+.IP "+exdt, -exdt"
+Detect the spec. characters SCHR3 and SCHR4 in the receive data.
+.IP "parintr, parnull, parign, pardisc, parffnull
+Action on parity errors:
+.ES
+  Mode       Action
+ -----------------------------------------------------
+  parintr    Generate the receiver error interrupt
+  parnull    Input the NULL character
+  parign     Ignore the error, receive as good data
+  pardisc    Ignore the character
+  parffnull  Input the sequence <0xFF, NULL, character>
+.EE
+.IP "brkintr, brknull, brkdisc
+Line break state action:
+.ES
+  Mode     Action
+ ---------------------------------------------------
+  brkintr  Generate the receiver error interrupt
+  brknull  Input the NULL character
+  brkdisc  Ignore the line break state
+.EE
+.IP "+inlcr, -inlcr"
+Translate received NL characters to CR.
+.IP "+icrnl, -icrnl"
+Translate received CR characters to NL.
+.IP "+igncr, -igncr"
+Ignore received CR characters.
+.IP "+ocrnl, -ocrnl"
+Translate transmitted CR characters to NL.
+.IP "+onlcr, -onlcr"
+Translate transmitted NL characters to CR.
+.IP "+fcerr, -fcerr"
+Process (don't process) the characters, received with errors,
+for special character/flow control matching.
+.IP "+lnext, -lnext"
+Enable the LNEXT character option: the character following
+the LNEXT character is not processed for special character/flow
+control matching.
+.IP "+istrip, -istrip"
+Strip input characters to seven bits.
+.IP schr1=#
+The XON flow control character value.
+.IP schr2=#
+The XOFF flow control character value.
+.IP schr3=#
+The SCHR3 spec. character value.
+.IP schr4=#
+The SCHR4 spec. character value.
+.IP "scrl=#, scrh=#
+The spec. character range (inclusive).
+.IP lnext=#
+The LNEXT spec. character value.
+.SH "HDLC mode options"
+.IP if#
+The minimum number of flags transmitted before a frame is started.
+.IP noaddr
+No frame address recognition.
+.IP "addrlen1, addrlen2"
+Address field length: 1 or 2 bytes.
+.IP "addr1, addr2"
+Addressing mode: 4x1 bytes or 2x2 bytes.
+Registers RFAR1..RFAR4 should contain the address to be matched.
+.IP "+clrdet, -clrdet"
+Enable/disable clear detect for X.21 protocol support.
+.IP "+dsr, -dsr"
+Use the DSR input signal as receiver enable/disable.
+.IP "+cts, -cts"
+Use the CTS input signal as transmitter enable/disable.
+.IP "+rts, -rts"
+Drive the RTS output signal as transmitter ready.
+.IP "+fcs, -fcs"
+Enable/disable the frame checksum generation and checking.
+.IP "crc-16, crc-v.41
+Select the CRC polynomial: CRC-16 (x^16+x^15+x^2+1)
+or CRC V.41 (x^16+x^12+x^5+1).
+.IP "fcs-crc-16, fcs-v.41
+Frame checksum preset: all zeros (CRC-16) or all ones (CRC V.41).
+.IP "+crcinv, -crcinv"
+Invert (ie. CRC V.41) or don't invert (ie. CRC-16) the transmitted frame checksum.
+.IP "+fcsapd, -fcsapd"
+Pass the received CRC to the host at the end of receiver data buffer.
+.IP "idlemark, idleflag
+Idle mode: idle in mark (transmit all ones) or idle in flag (transmit flag).
+.IP "+syn, -syn"
+Enable/disable sending pad characters before sending flag when coming out
+of the idle mode.
+.IP pad#
+The number of synchronous characters sent (0..4).
+.IP "syn=0xaa, syn=0x00
+Send sync pattern.
+.IP "rfar1=#, rfar2=#, rfar3=#, rfar4=#
+Frame address registers for address recognition.
+.SH EXAMPLES
+.PP
+Set up the channel 7 of the adapter Sigma-400 under FreeBSD.
+Physical 4-wire leased line with Zelax+ M115 short-range modems.
+Synchronous mode, 128000 bits/sec, interface RS-232,
+protocol PPP/HDLC without keepalive support, NRZI encoding,
+DPLL mode, no flow control:
+.ES
+cxconfig cx7 128000 hdlc ppp -keepalive nrzi -cts +dpll -extclock
+ifconfig cx7 158.250.244.2 158.250.244.1 up
+.EE
+.PP
+Set up the channel 0 of the adapter Sigma-100 under FreeBSD.
+Attachment to the near computer by short cable, internal clock source.
+Synchronous mode, 256000 bits/sec, interface RS-232,
+protocol Cisco/HDLC with keepalive support:
+.ES
+cxconfig cx0 hdlc 256000 cisco +keepalive -extclock
+ifconfig cx0 200.1.1.1 200.1.1.2 up
+.EE
+.PP
+Set up the channel 1 of the adapter Sigma-840 under BSD/386.
+Synchronous 64 kbit/sec leased line, external clock source.
+Synchronous mode, interface V.35, external protocol suite:
+.ES
+cxconfig cx1 hdlc ext
+ifconfig cx1 193.124.254.50 193.124.254.49 multicast up
+.EE
+.PP
+Set up the channel 0 of the adapter Sigma-840 under FreeBSD.
+Attachment to the Cisco-4000 router by null-modem cable, internal clock source.
+Synchronous mode, 64000 bits/sec, interface RS-232,
+protocol PPP/HDLC with keepalive support and flow control,
+LCP and IPCP protocols (see RFC-1548 and RFC-1332) debug tracing enabled:
+.ES
+cxconfig cx0 hdlc 64000 port=rs232 ppp +keepalive -extclock +cts
+ifconfig cx0 100.0.0.2 100.0.0.1 debug up
+.EE
+.SH FILES
+.IP /dev/cronyx
+The special device file for adapter options management.
+.SH SEE ALSO
+.PP
+cx(4)
diff --git a/sbin/cxconfig/cxconfig.c b/sbin/cxconfig/cxconfig.c
new file mode 100644
index 0000000..0a2391f
--- /dev/null
+++ b/sbin/cxconfig/cxconfig.c
@@ -0,0 +1,704 @@
+/*
+ * Cronyx-Sigma adapter configuration utility for Unix.
+ *
+ * Copyright (C) 1994 Cronyx Ltd.
+ * Author: Serge Vakulenko, <vak@zebub.msk.su>
+ *
+ * This software is distributed with NO WARRANTIES, not even the implied
+ * warranties for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * Authors grant any other persons or organisations permission to use
+ * or modify this software as long as this message is kept with the software,
+ * all derivative works or modified versions.
+ *
+ * Version 1.1, Wed Oct 26 16:08:09 MSK 1994
+ *
+ * Usage:
+ *      cxconfig [-a]
+ *              -- print status of all channels
+ *      cxconfig [-a] <channel>
+ *              -- print status of the channel
+ *      cxconfig <channel> <option>...
+ *              -- set channel options
+ */
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/ioctl.h>
+#include <sys/cronyx.h>
+#include <net/if.h>
+#include <stdio.h>
+
+#define CXDEV   "/dev/cronyx"
+#define atoi(a) strtol((a), (char**)0, 0)
+
+cx_options_t o;
+int aflag;
+
+char *symbol (unsigned char sym)
+{
+	static char buf[40];
+
+	if (sym < ' ')
+		sprintf (buf, "^%c", sym+0100);
+	else if (sym == '\\')
+		strcat (buf, "\\\\");
+	else if (sym < 127)
+		sprintf (buf, "%c", sym);
+	else
+		sprintf (buf, "\\%03o", sym);
+	return (buf);
+}
+
+unsigned char atosym (char *s)
+{
+	unsigned char c;
+
+	if (*s == '^')
+		return (*++s & 037);
+	if (*s == '\\')
+		return (strtol (++s, 0, 8));
+	return (*s);
+}
+
+void usage ()
+{
+	printf ("Cronyx-Sigma Adapter Configuration Utility, Version 1.0\n");
+	printf ("Copyright (C) 1994 Cronyx Ltd.\n");
+	printf ("Usage:\n");
+	printf ("\tcxconfig [-a]\n");
+	printf ("\t\t-- print status of all channels\n");
+	printf ("\tcxconfig [-a] <channel>\n");
+	printf ("\t\t-- print status of the channel\n");
+	printf ("\tcxconfig <channel> [async | hdlc | bisync | x.21] [ispeed #] [ospeed #]\n");
+	printf ("\t\t[+cts | -cts]\n");
+	printf ("\t\t-- set channel options\n");
+	exit (1);
+}
+
+char *chantype (int type)
+{
+	switch (type) {
+	case T_NONE:       return ("none");
+	case T_ASYNC:      return ("RS-232");
+	case T_UNIV_RS232: return ("RS-232");
+	case T_UNIV_RS449: return ("RS-232/RS-449");
+	case T_UNIV_V35:   return ("RS-232/V.35");
+	case T_SYNC_RS232: return ("RS-232");
+	case T_SYNC_V35:   return ("V.35");
+	case T_SYNC_RS449: return ("RS-449");
+	}
+}
+
+char *chanmode (int mode)
+{
+	switch (mode) {
+	case M_ASYNC:   return ("Async");
+	case M_HDLC:    return ("HDLC");
+	case M_BISYNC:  return ("Bisync");
+	case M_X21:     return ("X.21");
+	default:        return ("???");
+	}
+}
+
+void getchan (int channel)
+{
+	int s = open (CXDEV, 0);
+	if (s < 0) {
+		perror (CXDEV);
+		exit (1);
+	}
+	o.board = channel/NCHAN;
+	o.channel = channel%NCHAN;
+	if (ioctl (s, CXIOCGETMODE, (caddr_t)&o) < 0) {
+		perror ("cxconfig: CXIOCGETMODE");
+		exit (1);
+	}
+	close (s);
+	if (o.type == T_NONE) {
+		fprintf (stderr, "cx%d: channel %d not configured\n", o.board,
+			o.channel);
+		exit (1);
+	}
+}
+
+void setchan (int channel)
+{
+	int s = open (CXDEV, 0);
+	if (s < 0) {
+		perror (CXDEV);
+		exit (1);
+	}
+	o.board = channel/NCHAN;
+	o.channel = channel%NCHAN;
+	if (ioctl (s, CXIOCSETMODE, (caddr_t)&o) < 0) {
+		perror ("cxconfig: CXIOCSETMODE");
+		exit (1);
+	}
+	close (s);
+}
+
+void printopt ()
+{
+	/* Common channel options */
+	/* channel option register 4 */
+	printf ("\t");
+	printf ("fifo=%d ", o.opt.cor4.thr);    /* FIFO threshold */
+	printf ("%cctsdown ", o.opt.cor4.cts_zd ? '+' : '-');   /* detect 1 to 0 transition on the CTS */
+	printf ("%ccddown ", o.opt.cor4.cd_zd ? '+' : '-');     /* detect 1 to 0 transition on the CD */
+	printf ("%cdsrdown ", o.opt.cor4.dsr_zd ? '+' : '-');   /* detect 1 to 0 transition on the DSR */
+	printf ("\n");
+
+	/* channel option register 5 */
+	printf ("\t");
+	printf ("rfifo=%d ", o.opt.cor5.rx_thr);        /* receive flow control FIFO threshold */
+	printf ("%cctsup ", o.opt.cor5.cts_od ? '+' : '-');     /* detect 0 to 1 transition on the CTS */
+	printf ("%ccdup ", o.opt.cor5.cd_od ? '+' : '-');       /* detect 0 to 1 transition on the CD */
+	printf ("%cdsrup ", o.opt.cor5.dsr_od ? '+' : '-');     /* detect 0 to 1 transition on the DSR */
+	printf ("\n");
+
+	/* receive clock option register */
+	printf ("\t");
+	printf ("%s ", o.opt.rcor.encod == ENCOD_NRZ ? "nrz" :  /* signal encoding */
+		o.opt.rcor.encod == ENCOD_NRZI ? "nrzi" :
+		o.opt.rcor.encod == ENCOD_MANCHESTER ? "manchester" : "???");
+	printf ("%cdpll ", o.opt.rcor.dpll ? '+' : '-');        /* DPLL enable */
+
+	/* transmit clock option register */
+	printf ("%clloop ", o.opt.tcor.llm ? '+' : '-');        /* local loopback mode */
+	printf ("%cextclock ", o.opt.tcor.ext1x ? '+' : '-');   /* external 1x clock mode */
+	printf ("\n");
+
+	switch (o.mode) {
+	case M_ASYNC:                           /* async mode options */
+		/* channel option register 1 */
+		printf ("\t");
+		printf ("cs%d ", o.aopt.cor1.charlen+1);        /* character length, 5..8 */
+		printf ("par%s ", o.aopt.cor1.parity ? "odd" : "even"); /* parity */
+		printf ("%cignpar ", o.aopt.cor1.ignpar ? '+' : '-');   /* ignore parity */
+		if (o.aopt.cor1.parmode != PARM_NORMAL)                 /* parity mode */
+			printf ("%s ", o.aopt.cor1.parmode == PARM_NOPAR ? "nopar" :
+				o.aopt.cor1.parmode == PARM_FORCE ? "forcepar" : "???");
+		printf ("\n");
+
+		/* channel option register 2 */
+		printf ("\t");
+		printf ("%cdsr ", o.aopt.cor2.dsrae ? '+' : '-');  /* DSR automatic enable */
+		printf ("%ccts ", o.aopt.cor2.ctsae ? '+' : '-');  /* CTS automatic enable */
+		printf ("%crts ", o.aopt.cor2.rtsao ? '+' : '-');  /* RTS automatic output enable */
+		printf ("%crloop ", o.aopt.cor2.rlm ? '+' : '-');  /* remote loopback mode enable */
+		printf ("%cetc ", o.aopt.cor2.etc ? '+' : '-');    /* embedded transmitter cmd enable */
+		printf ("%cxon ", o.aopt.cor2.ixon ? '+' : '-');   /* in-band XON/XOFF enable */
+		printf ("%cxany ", o.aopt.cor2.ixany ? '+' : '-'); /* XON on any character */
+		printf ("\n");
+
+		/* option register 3 */
+		printf ("\t");
+		printf ("%s ", o.aopt.cor3.stopb == STOPB_1 ? "stopb1" : /* stop bit length */
+			o.aopt.cor3.stopb == STOPB_15 ? "stopb1.5" :
+			o.aopt.cor3.stopb == STOPB_2 ? "stopb2" : "???");
+		printf ("%csdt ", o.aopt.cor3.scde ? '+' : '-');        /* special char detection enable */
+		printf ("%cflowct ", o.aopt.cor3.flowct ? '+' : '-');   /* flow control transparency mode */
+		printf ("%crdt ", o.aopt.cor3.rngde ? '+' : '-');       /* range detect enable */
+		printf ("%cexdt ", o.aopt.cor3.escde ? '+' : '-');      /* extended spec. char detect enable */
+		printf ("\n");
+
+		/* channel option register 6 */
+		printf ("\t");
+		printf ("%s ", o.aopt.cor6.parerr == PERR_INTR ? "parintr" : /* parity/framing error actions */
+			o.aopt.cor6.parerr == PERR_NULL ? "parnull" :
+			o.aopt.cor6.parerr == PERR_IGNORE ? "parign" :
+			o.aopt.cor6.parerr == PERR_DISCARD ? "pardisc" :
+			o.aopt.cor6.parerr == PERR_FFNULL ? "parffnull" : "???");
+		printf ("%s ", o.aopt.cor6.brk == BRK_INTR ? "brkintr" : /* action on break condition */
+			o.aopt.cor6.brk == BRK_NULL ? "brknull" :
+			o.aopt.cor6.brk == BRK_DISCARD ? "brkdisc" : "???");
+		printf ("%cinlcr ", o.aopt.cor6.inlcr ? '+' : '-');     /* translate NL to CR on input */
+		printf ("%cicrnl ", o.aopt.cor6.icrnl ? '+' : '-');     /* translate CR to NL on input */
+		printf ("%cigncr ", o.aopt.cor6.igncr ? '+' : '-');     /* discard CR on input */
+		printf ("\n");
+
+		/* channel option register 7 */
+		printf ("\t");
+		printf ("%cocrnl ", o.aopt.cor7.ocrnl ? '+' : '-');     /* translate CR to NL on output */
+		printf ("%conlcr ", o.aopt.cor7.onlcr ? '+' : '-');     /* translate NL to CR on output */
+		printf ("%cfcerr ", o.aopt.cor7.fcerr ? '+' : '-');     /* process flow ctl err chars enable */
+		printf ("%clnext ", o.aopt.cor7.lnext ? '+' : '-');     /* LNext option enable */
+		printf ("%cistrip ", o.aopt.cor7.istrip ? '+' : '-');   /* strip 8-bit on input */
+		printf ("\n");
+
+		printf ("\t");
+		printf ("schr1=%s ", symbol (o.aopt.schr1));    /* special character register 1 (XON) */
+		printf ("schr2=%s ", symbol (o.aopt.schr2));    /* special character register 2 (XOFF) */
+		printf ("schr3=%s ", symbol (o.aopt.schr3));    /* special character register 3 */
+		printf ("schr4=%s ", symbol (o.aopt.schr4));    /* special character register 4 */
+		printf ("scrl=%s ", symbol (o.aopt.scrl));      /* special character range low */
+		printf ("scrh=%s ", symbol (o.aopt.scrh));      /* special character range high */
+		printf ("lnext=%s ", symbol (o.aopt.lnxt));     /* LNext character */
+		printf ("\n");
+		break;
+
+	case M_HDLC:                    /* hdlc mode options */
+		/* hdlc channel option register 1 */
+		printf ("\t");
+		printf ("if%d ", o.hopt.cor1.ifflags);  /* number of inter-frame flags sent */
+		printf ("%s ", o.hopt.cor1.admode == ADMODE_NOADDR ? "noaddr" : /* addressing mode */
+			o.hopt.cor1.admode == ADMODE_4_1 ? "addr1" :
+			o.hopt.cor1.admode == ADMODE_2_2 ? "addr2" : "???");
+		printf ("%cclrdet ", o.hopt.cor1.clrdet ? '+' : '-'); /* clear detect for X.21 data transfer phase */
+		printf ("addrlen%d ", o.hopt.cor1.aflo + 1);    /* address field length option */
+		printf ("\n");
+
+		/* hdlc channel option register 2 */
+		printf ("\t");
+		printf ("%cdsr ", o.hopt.cor2.dsrae ? '+' : '-'); /* DSR automatic enable */
+		printf ("%ccts ", o.hopt.cor2.ctsae ? '+' : '-'); /* CTS automatic enable */
+		printf ("%crts ", o.hopt.cor2.rtsao ? '+' : '-'); /* RTS automatic output enable */
+		printf ("%ccrcinv ", o.hopt.cor2.crcninv ? '-' : '+');  /* CRC invertion option */
+		printf ("%cfcsapd ", o.hopt.cor2.fcsapd ? '+' : '-');   /* FCS append */
+		printf ("\n");
+
+		/* hdlc channel option register 3 */
+		printf ("\t");
+		printf ("pad%d ", o.hopt.cor3.padcnt);  /* pad character count */
+		printf ("idle%s ", o.hopt.cor3.idle ? "mark" : "flag"); /* idle mode */
+		printf ("%cfcs ", o.hopt.cor3.nofcs ? '-' : '+');       /* FCS disable */
+		printf ("fcs-%s ", o.hopt.cor3.fcspre ? "crc-16" : "v.41"); /* FCS preset */
+		printf ("syn=%s ", o.hopt.cor3.syncpat ? "0xAA" : "0x00"); /* send sync pattern */
+		printf ("%csyn ", o.hopt.cor3.sndpad ? '+' : '-');     /* send pad characters before flag enable */
+		printf ("\n");
+
+		printf ("\t");
+		printf ("rfar1=0x%02x ", o.hopt.rfar1); /* receive frame address register 1 */
+		printf ("rfar2=0x%02x ", o.hopt.rfar2); /* receive frame address register 2 */
+		printf ("rfar3=0x%02x ", o.hopt.rfar3); /* receive frame address register 3 */
+		printf ("rfar4=0x%02x ", o.hopt.rfar4); /* receive frame address register 4 */
+		printf ("crc-%s ", o.hopt.cpsr ? "16" : "v.41"); /* CRC polynomial select */
+		printf ("\n");
+		break;
+
+	case M_BISYNC:                  /* bisync mode options */
+		/* channel option register 1 */
+		printf ("\t");
+		printf ("cs%d ", o.bopt.cor1.charlen+1);        /* character length, 5..8 */
+		printf ("par%s ", o.bopt.cor1.parity ? "odd" : "even"); /* parity */
+		printf ("%cignpar ", o.bopt.cor1.ignpar ? '+' : '-');   /* ignore parity */
+		if (o.bopt.cor1.parmode != PARM_NORMAL)                 /* parity mode */
+			printf ("%s ", o.bopt.cor1.parmode == PARM_NOPAR ? "nopar" :
+				o.bopt.cor1.parmode == PARM_FORCE ? "forcepar" : "???");
+		printf ("\n");
+
+		/* channel option register 2 */
+		printf ("\t");
+		printf ("syn%d ", o.bopt.cor2.syns+2);                  /* number of extra SYN chars before a frame */
+		printf ("%ccrcinv ", o.bopt.cor2.crcninv ? '-' : '+');  /* CRC invertion option */
+		printf ("%s ", o.bopt.cor2.ebcdic ? "ebcdic" : "ascii"); /* use EBCDIC as char set (instead of ASCII) */
+		printf ("%cbccapd ", o.bopt.cor2.bcc ? '+' : '-');      /* BCC append enable */
+		printf ("%s ", o.bopt.cor2.lrc ? "lrc" : "crc-16");     /* longitudinal redundancy check */
+		printf ("\n");
+
+		/* channel option register 3 */
+		printf ("\t");
+		printf ("pad%d ", o.bopt.cor3.padcnt);  /* pad character count */
+		printf ("idle%s ", o.bopt.cor3.idle ? "mark" : "syn"); /* idle mode */
+		printf ("%cfcs ", o.bopt.cor3.nofcs ? '-' : '+');       /* FCS disable */
+		printf ("fcs-%s ", o.bopt.cor3.fcspre ? "crc-16" : "v.41"); /* FCS preset */
+		printf ("syn=%s ", o.bopt.cor3.padpat ? "0x55" : "0xAA"); /* send sync pattern */
+		printf ("%csyn ", o.bopt.cor3.sndpad ? '+' : '-');     /* send pad characters before flag enable */
+		printf ("\n");
+
+		/* channel option register 6 */
+		printf ("\t");
+		printf ("specterm=%s ", symbol (o.bopt.cor6.specterm)); /* special termination character */
+
+		printf ("crc-%s ", o.bopt.cpsr ? "16" : "v.41"); /* CRC polynomial select */
+		printf ("\n");
+		break;
+
+	case M_X21:                     /* x.21 mode options */
+		/* channel option register 1 */
+		printf ("\t");
+		printf ("cs%d ", o.xopt.cor1.charlen+1);        /* character length, 5..8 */
+		printf ("par%s ", o.xopt.cor1.parity ? "odd" : "even"); /* parity */
+		printf ("%cignpar ", o.xopt.cor1.ignpar ? '+' : '-');   /* ignore parity */
+		if (o.xopt.cor1.parmode != PARM_NORMAL)                 /* parity mode */
+			printf ("%s ", o.xopt.cor1.parmode == PARM_NOPAR ? "nopar" :
+				o.xopt.cor1.parmode == PARM_FORCE ? "forcepar" : "???");
+		printf ("\n");
+
+		/* channel option register 2 */
+		printf ("\t");
+		printf ("%cetc ", o.xopt.cor2.etc ? '+' : '-'); /* embedded transmitter cmd enable */
+
+		/* channel option register 3 */
+		printf ("%csdt ", o.xopt.cor3.scde ? '+' : '-'); /* special char detection enable */
+		printf ("%cstripsyn ", o.xopt.cor3.stripsyn ? '+' : '-'); /* treat SYN chars as special condition */
+		printf ("%cssdt ", o.xopt.cor3.ssde ? '+' : '-'); /* steady state detect enable */
+		printf ("syn%c ", o.xopt.cor3.syn ? '1' : '2'); /* the number of SYN chars on receive */
+		printf ("\n");
+
+		/* channel option register 6 */
+		printf ("\t");
+		printf ("syn=%s ", symbol (o.xopt.cor6.synchar)); /* syn character */
+
+		printf ("schr1=%s ", symbol (o.xopt.schr1));    /* special character register 1 */
+		printf ("schr2=%s ", symbol (o.xopt.schr2));    /* special character register 2 */
+		printf ("schr3=%s ", symbol (o.xopt.schr3));    /* special character register 3 */
+		printf ("\n");
+		break;
+	}
+}
+
+void printchan (int channel)
+{
+	printf ("cx%d (%s) %s", channel, chantype (o.type), chanmode (o.mode));
+	if (o.txbaud == o.rxbaud)
+		printf (" %d", o.rxbaud);
+	else
+		printf (" ospeed=%d ispeed=%d", o.txbaud, o.rxbaud);
+	if ((o.channel == 0 || o.channel == 8) &&
+	    (o.type == T_UNIV_V35 || o.type == T_UNIV_RS449))
+		printf (" port=%s", o.iftype ? (o.type == T_UNIV_V35 ?
+			"v35" : "rs449") : "rs232");
+	printf (o.sopt.ext ? " ext" : o.sopt.cisco ? " cisco" : " ppp");
+	printf (" %ckeepalive", o.sopt.keepalive ? '+' : '-');
+	printf (" %cautorts", o.sopt.norts ? '-' : '+');
+	printf ("\n");
+	if (aflag)
+		printopt ();
+}
+
+void printall ()
+{
+	struct ifconf ifc;
+	struct ifreq *ifr;
+	char buf[BUFSIZ], *cp;
+	int s, c;
+
+	s = socket (AF_INET, SOCK_DGRAM, 0);
+	if (s < 0) {
+		perror ("cxconfig: socket");
+		exit (1);
+	}
+        ifc.ifc_len = sizeof (buf);
+        ifc.ifc_buf = buf;
+	if (ioctl (s, SIOCGIFCONF, (caddr_t)&ifc) < 0) {
+		perror ("cxconfig: SIOCGIFCONF");
+		exit (1);
+	}
+	close (s);
+	s = open (CXDEV, 0);
+	if (s < 0) {
+		perror (CXDEV);
+		exit (1);
+	}
+
+        ifr = ifc.ifc_req;
+#define max(a,b) ((a)>(b) ? (a) : (b))
+#define size(p)	max((p).sa_len, sizeof(p))
+	for (cp=buf; cp<buf+ifc.ifc_len; cp+=sizeof(ifr->ifr_name)+size(ifr->ifr_addr)) {
+		ifr = (struct ifreq*) cp;
+		if (ifr->ifr_addr.sa_family != AF_LINK)
+			continue;
+		if (strncmp (ifr->ifr_name, "cx", 2) != 0)
+			continue;
+		c = atoi (ifr->ifr_name + 2);
+		o.board = c/NCHAN;
+		o.channel = c%NCHAN;
+		if (ioctl (s, CXIOCGETMODE, (caddr_t)&o) < 0) {
+			perror ("cxconfig: CXIOCGETMODE");
+			exit (1);
+		}
+		printchan (c);
+	}
+	close (s);
+}
+
+void set_interface_type (char *type)
+{
+	if (o.channel != 0 && o.channel != 8) {
+		printf ("interface option is applicable only for channels 0 and 8\n");
+		exit (1);
+	}
+	if (o.type != T_UNIV_V35 && o.type != T_UNIV_RS449) {
+		printf ("interface option is applicable only for universal channels\n");
+		exit (1);
+	}
+	if (! strcasecmp (type, "port=rs232"))
+		o.iftype = 0;
+	else
+		o.iftype = 1;
+}
+
+void set_async_opt (char *opt)
+{
+	/* channel option register 1 */
+	if (! strncasecmp (opt, "cs", 2))        o.aopt.cor1.charlen = atoi (opt + 2) - 1;
+	else if (! strcasecmp (opt, "parodd"))   o.aopt.cor1.parity = 1;
+	else if (! strcasecmp (opt, "pareven"))  o.aopt.cor1.parity = 0;
+	else if (! strcasecmp (opt, "-ignpar"))  o.aopt.cor1.ignpar = 0;
+	else if (! strcasecmp (opt, "+ignpar"))  o.aopt.cor1.ignpar = 1;
+	else if (! strcasecmp (opt, "nopar"))    o.aopt.cor1.parmode = PARM_NOPAR;
+	else if (! strcasecmp (opt, "forcepar")) o.aopt.cor1.parmode = PARM_FORCE;
+
+	/* channel option register 2 */
+	else if (! strcasecmp (opt, "-dsr"))   o.aopt.cor2.dsrae = 0;
+	else if (! strcasecmp (opt, "+dsr"))   o.aopt.cor2.dsrae = 1;
+	else if (! strcasecmp (opt, "-cts"))   o.aopt.cor2.ctsae = 0;
+	else if (! strcasecmp (opt, "+cts"))   o.aopt.cor2.ctsae = 1;
+	else if (! strcasecmp (opt, "-rts"))   o.aopt.cor2.rtsao = 0;
+	else if (! strcasecmp (opt, "+rts"))   o.aopt.cor2.rtsao = 1;
+	else if (! strcasecmp (opt, "-rloop")) o.aopt.cor2.rlm = 0;
+	else if (! strcasecmp (opt, "+rloop")) o.aopt.cor2.rlm = 1;
+	else if (! strcasecmp (opt, "-etc"))   o.aopt.cor2.etc = 0;
+	else if (! strcasecmp (opt, "+etc"))   o.aopt.cor2.etc = 1;
+	else if (! strcasecmp (opt, "-ixon"))  o.aopt.cor2.ixon = 0;
+	else if (! strcasecmp (opt, "+ixon"))  o.aopt.cor2.ixon = 1;
+	else if (! strcasecmp (opt, "-ixany")) o.aopt.cor2.ixany = 0;
+	else if (! strcasecmp (opt, "+ixany")) o.aopt.cor2.ixany = 1;
+
+	/* option register 3 */
+	else if (! strcasecmp (opt, "stopb1"))   o.aopt.cor3.stopb = STOPB_1;
+	else if (! strcasecmp (opt, "stopb1.5")) o.aopt.cor3.stopb = STOPB_15;
+	else if (! strcasecmp (opt, "stopb2"))   o.aopt.cor3.stopb = STOPB_2;
+	else if (! strcasecmp (opt, "-sdt"))     o.aopt.cor3.scde = 0;
+	else if (! strcasecmp (opt, "+sdt"))     o.aopt.cor3.scde = 1;
+	else if (! strcasecmp (opt, "-flowct"))  o.aopt.cor3.flowct = 0;
+	else if (! strcasecmp (opt, "+flowct"))  o.aopt.cor3.flowct = 1;
+	else if (! strcasecmp (opt, "-rdt"))     o.aopt.cor3.rngde = 0;
+	else if (! strcasecmp (opt, "+rdt"))     o.aopt.cor3.rngde = 1;
+	else if (! strcasecmp (opt, "-exdt"))    o.aopt.cor3.escde = 0;
+	else if (! strcasecmp (opt, "+exdt"))    o.aopt.cor3.escde = 1;
+
+	/* channel option register 6 */
+	else if (! strcasecmp (opt, "parintr"))   o.aopt.cor6.parerr = PERR_INTR;
+	else if (! strcasecmp (opt, "parnull"))   o.aopt.cor6.parerr = PERR_NULL;
+	else if (! strcasecmp (opt, "parign"))    o.aopt.cor6.parerr = PERR_IGNORE;
+	else if (! strcasecmp (opt, "pardisc"))   o.aopt.cor6.parerr = PERR_DISCARD;
+	else if (! strcasecmp (opt, "parffnull")) o.aopt.cor6.parerr = PERR_FFNULL;
+	else if (! strcasecmp (opt, "brkintr"))   o.aopt.cor6.brk = BRK_INTR;
+	else if (! strcasecmp (opt, "brknull"))   o.aopt.cor6.brk = BRK_NULL;
+	else if (! strcasecmp (opt, "brkdisc"))   o.aopt.cor6.brk = BRK_DISCARD;
+	else if (! strcasecmp (opt, "-inlcr"))    o.aopt.cor6.inlcr = 0;
+	else if (! strcasecmp (opt, "+inlcr"))    o.aopt.cor6.inlcr = 1;
+	else if (! strcasecmp (opt, "-icrnl"))    o.aopt.cor6.icrnl = 0;
+	else if (! strcasecmp (opt, "+icrnl"))    o.aopt.cor6.icrnl = 1;
+	else if (! strcasecmp (opt, "-igncr"))    o.aopt.cor6.igncr = 0;
+	else if (! strcasecmp (opt, "+igncr"))    o.aopt.cor6.igncr = 1;
+
+	/* channel option register 7 */
+	else if (! strcasecmp (opt, "-ocrnl"))    o.aopt.cor7.ocrnl = 0;
+	else if (! strcasecmp (opt, "+ocrnl"))    o.aopt.cor7.ocrnl = 1;
+	else if (! strcasecmp (opt, "-onlcr"))    o.aopt.cor7.onlcr = 0;
+	else if (! strcasecmp (opt, "+onlcr"))    o.aopt.cor7.onlcr = 1;
+	else if (! strcasecmp (opt, "-fcerr"))    o.aopt.cor7.fcerr = 0;
+	else if (! strcasecmp (opt, "+fcerr"))    o.aopt.cor7.fcerr = 1;
+	else if (! strcasecmp (opt, "-lnext"))    o.aopt.cor7.lnext = 0;
+	else if (! strcasecmp (opt, "+lnext"))    o.aopt.cor7.lnext = 1;
+	else if (! strcasecmp (opt, "-istrip"))   o.aopt.cor7.istrip = 0;
+	else if (! strcasecmp (opt, "+istrip"))   o.aopt.cor7.istrip = 1;
+
+	else if (! strncasecmp (opt, "schr1=", 6)) o.aopt.schr1 = atosym (opt+6);
+	else if (! strncasecmp (opt, "schr2=", 6)) o.aopt.schr2 = atosym (opt+6);
+	else if (! strncasecmp (opt, "schr3=", 6)) o.aopt.schr3 = atosym (opt+6);
+	else if (! strncasecmp (opt, "schr4=", 6)) o.aopt.schr4 = atosym (opt+6);
+	else if (! strncasecmp (opt, "scrl=", 5))  o.aopt.scrl = atosym (opt+5);
+	else if (! strncasecmp (opt, "scrh=", 5))  o.aopt.scrh = atosym (opt+5);
+	else if (! strncasecmp (opt, "lnext=", 6)) o.aopt.lnxt = atosym (opt+6);
+	else
+		usage ();
+}
+
+void set_hdlc_opt (char *opt)
+{
+	/* hdlc channel option register 1 */
+	if (! strncasecmp (opt, "if", 2))        o.hopt.cor1.ifflags = atoi (opt + 2);
+	else if (! strcasecmp (opt, "noaddr"))   o.hopt.cor1.admode = ADMODE_NOADDR;
+	else if (! strcasecmp (opt, "addr1"))    o.hopt.cor1.admode = ADMODE_4_1;
+	else if (! strcasecmp (opt, "addr2"))    o.hopt.cor1.admode = ADMODE_2_2;
+	else if (! strcasecmp (opt, "-clrdet"))  o.hopt.cor1.clrdet = 0;
+	else if (! strcasecmp (opt, "+clrdet"))  o.hopt.cor1.clrdet = 1;
+	else if (! strcasecmp (opt, "addrlen1")) o.hopt.cor1.aflo = 0;
+	else if (! strcasecmp (opt, "addrlen2")) o.hopt.cor1.aflo = 1;
+
+	/* hdlc channel option register 2 */
+	else if (! strcasecmp (opt, "-dsr"))    o.hopt.cor2.dsrae = 0;
+	else if (! strcasecmp (opt, "+dsr"))    o.hopt.cor2.dsrae = 1;
+	else if (! strcasecmp (opt, "-cts"))    o.hopt.cor2.ctsae = 0;
+	else if (! strcasecmp (opt, "+cts"))    o.hopt.cor2.ctsae = 1;
+	else if (! strcasecmp (opt, "-rts"))    o.hopt.cor2.rtsao = 0;
+	else if (! strcasecmp (opt, "+rts"))    o.hopt.cor2.rtsao = 1;
+	else if (! strcasecmp (opt, "-fcsapd")) o.hopt.cor2.fcsapd = 0;
+	else if (! strcasecmp (opt, "+fcsapd")) o.hopt.cor2.fcsapd = 1;
+	else if (! strcasecmp (opt, "-crcinv")) o.hopt.cor2.crcninv = 1;
+	else if (! strcasecmp (opt, "+crcinv")) o.hopt.cor2.crcninv = 0;
+
+	/* hdlc channel option register 3 */
+	else if (! strncasecmp (opt, "pad", 3))    o.hopt.cor3.padcnt = atoi (opt + 3);
+	else if (! strcasecmp (opt, "idlemark"))   o.hopt.cor3.idle = 1;
+	else if (! strcasecmp (opt, "idleflag"))   o.hopt.cor3.idle = 0;
+	else if (! strcasecmp (opt, "-fcs"))       o.hopt.cor3.nofcs = 1;
+	else if (! strcasecmp (opt, "+fcs"))       o.hopt.cor3.nofcs = 0;
+	else if (! strcasecmp (opt, "fcs-crc-16")) o.hopt.cor3.fcspre = 1;
+	else if (! strcasecmp (opt, "fcs-v.41"))   o.hopt.cor3.fcspre = 0;
+	else if (! strcasecmp (opt, "syn=0xaa"))   o.hopt.cor3.syncpat = 1;
+	else if (! strcasecmp (opt, "syn=0x00"))   o.hopt.cor3.syncpat = 0;
+	else if (! strcasecmp (opt, "-syn"))       o.hopt.cor3.sndpad = 0;
+	else if (! strcasecmp (opt, "+syn"))       o.hopt.cor3.sndpad = 1;
+
+	else if (! strncasecmp (opt, "rfar1=", 6)) o.hopt.rfar1 = atoi (opt + 6);
+	else if (! strncasecmp (opt, "rfar2=", 6)) o.hopt.rfar2 = atoi (opt + 6);
+	else if (! strncasecmp (opt, "rfar3=", 6)) o.hopt.rfar3 = atoi (opt + 6);
+	else if (! strncasecmp (opt, "rfar4=", 6)) o.hopt.rfar4 = atoi (opt + 6);
+	else if (! strcasecmp (opt, "crc-16"))     o.hopt.cpsr = 1;
+	else if (! strcasecmp (opt, "crc-v.41"))   o.hopt.cpsr = 0;
+	else usage ();
+}
+
+void set_bisync_opt (char *opt)
+{
+	usage ();
+}
+
+void set_x21_opt (char *opt)
+{
+	usage ();
+}
+
+int main (int argc, char **argv)
+{
+	int channel;
+
+	for (--argc, ++argv; argc>0 && **argv=='-'; --argc, ++argv)
+		if (! strcasecmp (*argv, "-a"))
+			++aflag;
+		else
+			usage ();
+
+	if (argc <= 0) {
+		printall ();
+		return (0);
+	}
+
+	if (argv[0][0]=='c' && argv[0][1]=='x')
+		*argv += 2;
+	if (**argv<'0' || **argv>'9')
+		usage ();
+	channel = atoi (*argv);
+	--argc, ++argv;
+	getchan (channel);
+
+	if (argc <= 0) {
+		printchan (channel);
+		return (0);
+	}
+
+	for (; argc>0; --argc, ++argv)
+		if (**argv == '(')
+			continue;
+		else if (! strncasecmp (*argv, "ispeed=", 7))
+			o.rxbaud = atoi (*argv+7);
+		else if (! strncasecmp (*argv, "ospeed=", 7))
+			o.txbaud = atoi (*argv+7);
+		else if (! strcasecmp (*argv, "async"))
+			o.mode = M_ASYNC;
+		else if (! strcasecmp (*argv, "hdlc"))
+			o.mode = M_HDLC;
+		else if (! strcasecmp (*argv, "bisync") ||
+		    ! strcasecmp (*argv, "bsc"))
+			o.mode = M_BISYNC;
+		else if (! strcasecmp (*argv, "x.21") ||
+		    ! strcasecmp (*argv, "x21"))
+			o.mode = M_X21;
+		else if (**argv>='0' && **argv<='9')
+			o.txbaud = o.rxbaud = atoi (*argv);
+		else if (! strcasecmp (*argv, "cisco")) {
+			o.sopt.cisco = 1;
+			o.sopt.ext = 0;
+		} else if (! strcasecmp (*argv, "ppp")) {
+			o.sopt.cisco = 0;
+			o.sopt.ext = 0;
+		} else if (! strcasecmp (*argv, "ext"))
+			o.sopt.ext = 1;
+		else if (! strcasecmp (*argv, "+keepalive"))
+			o.sopt.keepalive = 1;
+		else if (! strcasecmp (*argv, "-keepalive"))
+			o.sopt.keepalive = 0;
+		else if (! strcasecmp (*argv, "+autorts"))
+			o.sopt.norts = 0;
+		else if (! strcasecmp (*argv, "-autorts"))
+			o.sopt.norts = 1;
+		else if (! strcasecmp (*argv, "port=rs232") ||
+		    ! strcasecmp (*argv, "port=rs449") ||
+		    ! strcasecmp (*argv, "port=v35"))
+			set_interface_type (*argv);
+
+		/*
+		 * Common channel options
+		 */
+		/* channel option register 4 */
+		else if (! strcasecmp (*argv, "-ctsdown"))
+			o.opt.cor4.cts_zd = 0;
+		else if (! strcasecmp (*argv, "+ctsdown"))
+			o.opt.cor4.cts_zd = 1;
+		else if (! strcasecmp (*argv, "-cddown"))
+			o.opt.cor4.cd_zd = 0;
+		else if (! strcasecmp (*argv, "+cddown"))
+			o.opt.cor4.cd_zd = 1;
+		else if (! strcasecmp (*argv, "-dsrdown"))
+			o.opt.cor4.dsr_zd = 0;
+		else if (! strcasecmp (*argv, "+dsrdown"))
+			o.opt.cor4.dsr_zd = 1;
+		else if (! strncasecmp (*argv, "fifo=", 5))
+			o.opt.cor4.thr = atoi (*argv + 5);
+
+		/* channel option register 5 */
+		else if (! strcasecmp (*argv, "-ctsup"))
+			o.opt.cor5.cts_od = 0;
+		else if (! strcasecmp (*argv, "+ctsup"))
+			o.opt.cor5.cts_od = 1;
+		else if (! strcasecmp (*argv, "-cdup"))
+			o.opt.cor5.cd_od = 0;
+		else if (! strcasecmp (*argv, "+cdup"))
+			o.opt.cor5.cd_od = 1;
+		else if (! strcasecmp (*argv, "-dsrup"))
+			o.opt.cor5.dsr_od = 0;
+		else if (! strcasecmp (*argv, "+dsrup"))
+			o.opt.cor5.dsr_od = 1;
+		else if (! strncasecmp (*argv, "rfifo=", 6))
+			o.opt.cor5.rx_thr = atoi (*argv + 6);
+
+		/* receive clock option register */
+		else if (! strcasecmp (*argv, "nrz"))
+			o.opt.rcor.encod = ENCOD_NRZ;
+		else if (! strcasecmp (*argv, "nrzi"))
+			o.opt.rcor.encod = ENCOD_NRZI;
+		else if (! strcasecmp (*argv, "manchester"))
+			o.opt.rcor.encod = ENCOD_MANCHESTER;
+		else if (! strcasecmp (*argv, "-dpll"))
+			o.opt.rcor.dpll = 0;
+		else if (! strcasecmp (*argv, "+dpll"))
+			o.opt.rcor.dpll = 1;
+
+		/* transmit clock option register */
+		else if (! strcasecmp (*argv, "-lloop"))
+			o.opt.tcor.llm = 0;
+		else if (! strcasecmp (*argv, "+lloop"))
+			o.opt.tcor.llm = 1;
+		else if (! strcasecmp (*argv, "-extclock"))
+			o.opt.tcor.ext1x = 0;
+		else if (! strcasecmp (*argv, "+extclock"))
+			o.opt.tcor.ext1x = 1;
+
+		/*
+		 * Mode dependent channel options
+		 */
+		else switch (o.mode) {
+		case M_ASYNC:  set_async_opt (*argv); break;
+		case M_HDLC:   set_hdlc_opt (*argv); break;
+		case M_BISYNC: set_bisync_opt (*argv); break;
+		case M_X21:    set_x21_opt (*argv); break;
+		}
+
+	setchan (channel);
+	return (0);
+}