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author | fenner <fenner@FreeBSD.org> | 2001-04-03 07:45:48 +0000 |
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committer | fenner <fenner@FreeBSD.org> | 2001-04-03 07:45:48 +0000 |
commit | f7d9a5e270bfcbb075a637a52416185441d33d8d (patch) | |
tree | e79d9e6f58638911260708c956a0d44069782cda /contrib/tcpdump/nameser.h | |
parent | 04f715925eb0f85e1b7d21424cdbb3f6f1fa0b41 (diff) | |
parent | ace14a2b50f2cc05c079d0b9137b49066dbb1206 (diff) | |
download | FreeBSD-src-f7d9a5e270bfcbb075a637a52416185441d33d8d.zip FreeBSD-src-f7d9a5e270bfcbb075a637a52416185441d33d8d.tar.gz |
This commit was generated by cvs2svn to compensate for changes in r75115,
which included commits to RCS files with non-trunk default branches.
Diffstat (limited to 'contrib/tcpdump/nameser.h')
-rw-r--r-- | contrib/tcpdump/nameser.h | 254 |
1 files changed, 254 insertions, 0 deletions
diff --git a/contrib/tcpdump/nameser.h b/contrib/tcpdump/nameser.h new file mode 100644 index 0000000..9963dd0 --- /dev/null +++ b/contrib/tcpdump/nameser.h @@ -0,0 +1,254 @@ +/* @(#) $Header: /tcpdump/master/tcpdump/nameser.h,v 1.5 2000/12/28 20:30:41 itojun Exp $ (LBL) */ +/* + * Copyright (c) 1983, 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. + * + * @(#)nameser.h 8.2 (Berkeley) 2/16/94 + * - + * Portions Copyright (c) 1993 by Digital Equipment Corporation. + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies, and that + * the name of Digital Equipment Corporation not be used in advertising or + * publicity pertaining to distribution of the document or software without + * specific, written prior permission. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL + * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT + * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL + * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR + * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS + * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS + * SOFTWARE. + * - + * --Copyright-- + */ + +#ifndef _NAMESER_H_ +#define _NAMESER_H_ + +#include <sys/types.h> + +/* + * Define constants based on rfc883 + */ +#define PACKETSZ 512 /* maximum packet size */ +#define MAXDNAME 256 /* maximum domain name */ +#define MAXCDNAME 255 /* maximum compressed domain name */ +#define MAXLABEL 63 /* maximum length of domain label */ + /* Number of bytes of fixed size data in query structure */ +#define QFIXEDSZ 4 + /* number of bytes of fixed size data in resource record */ +#define RRFIXEDSZ 10 + +/* + * Internet nameserver port number + */ +#define NAMESERVER_PORT 53 + +/* + * Currently defined opcodes + */ +#define QUERY 0x0 /* standard query */ +#define IQUERY 0x1 /* inverse query */ +#define STATUS 0x2 /* nameserver status query */ +#if 0 +#define xxx 0x3 /* 0x3 reserved */ +#endif + /* non standard - supports ALLOW_UPDATES stuff from Mike Schwartz */ +#define UPDATEA 0x9 /* add resource record */ +#define UPDATED 0xa /* delete a specific resource record */ +#define UPDATEDA 0xb /* delete all named resource record */ +#define UPDATEM 0xc /* modify a specific resource record */ +#define UPDATEMA 0xd /* modify all named resource record */ + +#define ZONEINIT 0xe /* initial zone transfer */ +#define ZONEREF 0xf /* incremental zone referesh */ + +/* + * Currently defined response codes + */ +#define NOERROR 0 /* no error */ +#define FORMERR 1 /* format error */ +#define SERVFAIL 2 /* server failure */ +#define NXDOMAIN 3 /* non existent domain */ +#define NOTIMP 4 /* not implemented */ +#define REFUSED 5 /* query refused */ + /* non standard */ +#define NOCHANGE 0xf /* update failed to change db */ + +/* + * Type values for resources and queries + */ +#define T_A 1 /* host address */ +#define T_NS 2 /* authoritative server */ +#define T_MD 3 /* mail destination */ +#define T_MF 4 /* mail forwarder */ +#define T_CNAME 5 /* connonical name */ +#define T_SOA 6 /* start of authority zone */ +#define T_MB 7 /* mailbox domain name */ +#define T_MG 8 /* mail group member */ +#define T_MR 9 /* mail rename name */ +#define T_NULL 10 /* null resource record */ +#define T_WKS 11 /* well known service */ +#define T_PTR 12 /* domain name pointer */ +#define T_HINFO 13 /* host information */ +#define T_MINFO 14 /* mailbox information */ +#define T_MX 15 /* mail routing information */ +#define T_TXT 16 /* text strings */ +#define T_RP 17 /* responsible person */ +#define T_AFSDB 18 /* AFS cell database */ +#define T_NSAP 22 /* NSAP address */ +#define T_NSAP_PTR 23 /* reverse lookup for NSAP */ + /* non standard */ +#define T_UINFO 100 /* user (finger) information */ +#define T_UID 101 /* user ID */ +#define T_GID 102 /* group ID */ +#define T_UNSPEC 103 /* Unspecified format (binary data) */ + /* Query type values which do not appear in resource records */ +#define T_AXFR 252 /* transfer zone of authority */ +#define T_MAILB 253 /* transfer mailbox records */ +#define T_MAILA 254 /* transfer mail agent records */ +#define T_ANY 255 /* wildcard match */ + +/* + * Values for class field + */ + +#define C_IN 1 /* the arpa internet */ +#define C_CHAOS 3 /* for chaos net (MIT) */ +#define C_HS 4 /* for Hesiod name server (MIT) (XXX) */ + /* Query class values which do not appear in resource records */ +#define C_ANY 255 /* wildcard match */ + +/* + * Status return codes for T_UNSPEC conversion routines + */ +#define CONV_SUCCESS 0 +#define CONV_OVERFLOW -1 +#define CONV_BADFMT -2 +#define CONV_BADCKSUM -3 +#define CONV_BADBUFLEN -4 + +/* + * Structure for query header. + */ +typedef struct { + u_int16_t id; /* query identification number */ + u_int8_t flags1; /* first byte of flags */ + u_int8_t flags2; /* second byte of flags */ + u_int16_t qdcount; /* number of question entries */ + u_int16_t ancount; /* number of answer entries */ + u_int16_t nscount; /* number of authority entries */ + u_int16_t arcount; /* number of resource entries */ +} HEADER; + +/* + * Macros for subfields of flag fields. + */ +#define DNS_QR(np) ((np)->flags1 & 0x80) /* response flag */ +#define DNS_OPCODE(np) ((((np)->flags1) >> 3) & 0xF) /* purpose of message */ +#define DNS_AA(np) ((np)->flags1 & 0x04) /* authoritative answer */ +#define DNS_TC(np) ((np)->flags1 & 0x02) /* truncated message */ +#define DNS_RD(np) ((np)->flags1 & 0x01) /* recursion desired */ + +#define DNS_RA(np) ((np)->flags2 & 0x80) /* recursion available */ +#define DNS_AD(np) ((np)->flags2 & 0x20) /* authentic data from named */ +#define DNS_CD(np) ((np)->flags2 & 0x10) /* checking disabled by resolver */ +#define DNS_RCODE(np) ((np)->flags2 & 0xF) /* response code */ + +/* + * Defines for handling compressed domain names, EDNS0 labels, etc. + */ +#define INDIR_MASK 0xc0 /* 11.... */ +#define EDNS0_MASK 0x40 /* 01.... */ +# define EDNS0_ELT_BITLABEL 0x01 + +/* + * Structure for passing resource records around. + */ +struct rrec { + int16_t r_zone; /* zone number */ + int16_t r_class; /* class number */ + int16_t r_type; /* type number */ + u_int32_t r_ttl; /* time to live */ + int r_size; /* size of data area */ + char *r_data; /* pointer to data */ +}; + +/* + * Inline versions of get/put short/long. Pointer is advanced. + * We also assume that a "u_int16_t" holds 2 "chars" + * and that a "u_int32_t" holds 4 "chars". + * + * These macros demonstrate the property of C whereby it can be + * portable or it can be elegant but never both. + */ +#define GETSHORT(s, cp) { \ + register u_char *t_cp = (u_char *)(cp); \ + (s) = ((u_int16_t)t_cp[0] << 8) | (u_int16_t)t_cp[1]; \ + (cp) += 2; \ +} + +#define GETLONG(l, cp) { \ + register u_char *t_cp = (u_char *)(cp); \ + (l) = (((u_int32_t)t_cp[0]) << 24) \ + | (((u_int32_t)t_cp[1]) << 16) \ + | (((u_int32_t)t_cp[2]) << 8) \ + | (((u_int32_t)t_cp[3])); \ + (cp) += 4; \ +} + +#define PUTSHORT(s, cp) { \ + register u_int16_t t_s = (u_int16_t)(s); \ + register u_char *t_cp = (u_char *)(cp); \ + *t_cp++ = t_s >> 8; \ + *t_cp = t_s; \ + (cp) += 2; \ +} + +/* + * Warning: PUTLONG --no-longer-- destroys its first argument. if you + * were depending on this "feature", you will lose. + */ +#define PUTLONG(l, cp) { \ + register u_int32_t t_l = (u_int32_t)(l); \ + register u_char *t_cp = (u_char *)(cp); \ + *t_cp++ = t_l >> 24; \ + *t_cp++ = t_l >> 16; \ + *t_cp++ = t_l >> 8; \ + *t_cp = t_l; \ + (cp) += 4; \ +} + +#endif /* !_NAMESER_H_ */ |