nameser.h revision 10132
11539Srgrimes/* 21539Srgrimes * Copyright (c) 1983, 1989, 1993 31539Srgrimes * The Regents of the University of California. All rights reserved. 41539Srgrimes * 51539Srgrimes * Redistribution and use in source and binary forms, with or without 61539Srgrimes * modification, are permitted provided that the following conditions 71539Srgrimes * are met: 81539Srgrimes * 1. Redistributions of source code must retain the above copyright 91539Srgrimes * notice, this list of conditions and the following disclaimer. 101539Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 111539Srgrimes * notice, this list of conditions and the following disclaimer in the 121539Srgrimes * documentation and/or other materials provided with the distribution. 131539Srgrimes * 3. All advertising materials mentioning features or use of this software 141539Srgrimes * must display the following acknowledgement: 151539Srgrimes * This product includes software developed by the University of 161539Srgrimes * California, Berkeley and its contributors. 171539Srgrimes * 4. Neither the name of the University nor the names of its contributors 181539Srgrimes * may be used to endorse or promote products derived from this software 191539Srgrimes * without specific prior written permission. 201539Srgrimes * 211539Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 221539Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 231539Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 241539Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 251539Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 261539Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 271539Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 281539Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 291539Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 301539Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 311539Srgrimes * SUCH DAMAGE. 321539Srgrimes * 331539Srgrimes * - 341539Srgrimes * Portions Copyright (c) 1993 by Digital Equipment Corporation. 358858Srgrimes * 361539Srgrimes * Permission to use, copy, modify, and distribute this software for any 371539Srgrimes * purpose with or without fee is hereby granted, provided that the above 381539Srgrimes * copyright notice and this permission notice appear in all copies, and that 391539Srgrimes * the name of Digital Equipment Corporation not be used in advertising or 401539Srgrimes * publicity pertaining to distribution of the document or software without 411539Srgrimes * specific, written prior permission. 428858Srgrimes * 431539Srgrimes * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL 441539Srgrimes * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES 451539Srgrimes * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT 461539Srgrimes * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL 471539Srgrimes * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR 481539Srgrimes * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS 491539Srgrimes * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS 501539Srgrimes * SOFTWARE. 511539Srgrimes * - 521539Srgrimes * --Copyright-- 533070Spst * 543070Spst * @(#)nameser.h 8.2 (Berkeley) 2/16/94 553070Spst * From Id: nameser.h,v 4.9.1.15 1994/07/19 22:51:24 vixie Exp 561539Srgrimes */ 571539Srgrimes 5810132Speter#ifndef _ARPA_NAMESER_H_ 5910132Speter#define _ARPA_NAMESER_H_ 601539Srgrimes 613070Spst#include <sys/param.h> 621539Srgrimes#include <sys/types.h> 633070Spst#include <sys/cdefs.h> 643070Spst#include <machine/endian.h> 651539Srgrimes 663070Spst 671539Srgrimes/* 683070Spst * revision information. this is the release date in YYYYMMDD format. 693070Spst * it can change every day so the right thing to do with it is use it 703070Spst * in preprocessor commands such as "#if (__BIND > 19931104)". do not 713070Spst * compare for equality; rather, use it to determine whether your resolver 723070Spst * is new enough to contain a certain feature. 733070Spst */ 743070Spst 7510132Speter#define __BIND 19950621 /* interface version stamp */ 763070Spst 773070Spst/* 781539Srgrimes * Define constants based on rfc883 791539Srgrimes */ 803070Spst#define PACKETSZ 512 /* maximum packet size */ 813070Spst#define MAXDNAME 256 /* maximum domain name */ 823070Spst#define MAXCDNAME 255 /* maximum compressed domain name */ 833070Spst#define MAXLABEL 63 /* maximum length of domain label */ 843070Spst#define HFIXEDSZ 12 /* #/bytes of fixed data in header */ 853070Spst#define QFIXEDSZ 4 /* #/bytes of fixed data in query */ 863070Spst#define RRFIXEDSZ 10 /* #/bytes of fixed data in r record */ 873070Spst#define INT32SZ 4 /* for systems without 32-bit ints */ 883070Spst#define INT16SZ 2 /* for systems without 16-bit ints */ 893070Spst#define INADDRSZ 4 /* for sizeof(struct inaddr) != 4 */ 901539Srgrimes 911539Srgrimes/* 921539Srgrimes * Internet nameserver port number 931539Srgrimes */ 943070Spst#define NAMESERVER_PORT 53 951539Srgrimes 961539Srgrimes/* 9710132Speter * Currently defined opcodes 981539Srgrimes */ 993070Spst#define QUERY 0x0 /* standard query */ 1003070Spst#define IQUERY 0x1 /* inverse query */ 1013070Spst#define STATUS 0x2 /* nameserver status query */ 10210132Speter/*#define xxx 0x3 */ /* 0x3 reserved */ 10310132Speter#define NS_NOTIFY_OP 0x4 /* notify secondary of SOA change */ 10410132Speter#ifdef ALLOW_UPDATES 1051539Srgrimes /* non standard - supports ALLOW_UPDATES stuff from Mike Schwartz */ 10610132Speter# define UPDATEA 0x9 /* add resource record */ 10710132Speter# define UPDATED 0xa /* delete a specific resource record */ 10810132Speter# define UPDATEDA 0xb /* delete all named resource record */ 10910132Speter# define UPDATEM 0xc /* modify a specific resource record */ 11010132Speter# define UPDATEMA 0xd /* modify all named resource record */ 11110132Speter# define ZONEINIT 0xe /* initial zone transfer */ 11210132Speter# define ZONEREF 0xf /* incremental zone referesh */ 11310132Speter#endif 1141539Srgrimes 1151539Srgrimes/* 11610132Speter * Currently defined response codes 1171539Srgrimes */ 1183070Spst#define NOERROR 0 /* no error */ 1193070Spst#define FORMERR 1 /* format error */ 1203070Spst#define SERVFAIL 2 /* server failure */ 1213070Spst#define NXDOMAIN 3 /* non existent domain */ 1223070Spst#define NOTIMP 4 /* not implemented */ 1233070Spst#define REFUSED 5 /* query refused */ 12410132Speter#ifdef ALLOW_UPDATES 1251539Srgrimes /* non standard */ 12610132Speter# define NOCHANGE 0xf /* update failed to change db */ 12710132Speter#endif 1281539Srgrimes 1291539Srgrimes/* 1301539Srgrimes * Type values for resources and queries 1311539Srgrimes */ 1323070Spst#define T_A 1 /* host address */ 1333070Spst#define T_NS 2 /* authoritative server */ 1343070Spst#define T_MD 3 /* mail destination */ 1353070Spst#define T_MF 4 /* mail forwarder */ 13610132Speter#define T_CNAME 5 /* canonical name */ 1373070Spst#define T_SOA 6 /* start of authority zone */ 1383070Spst#define T_MB 7 /* mailbox domain name */ 1393070Spst#define T_MG 8 /* mail group member */ 1403070Spst#define T_MR 9 /* mail rename name */ 1413070Spst#define T_NULL 10 /* null resource record */ 1423070Spst#define T_WKS 11 /* well known service */ 1433070Spst#define T_PTR 12 /* domain name pointer */ 1443070Spst#define T_HINFO 13 /* host information */ 1453070Spst#define T_MINFO 14 /* mailbox information */ 1463070Spst#define T_MX 15 /* mail routing information */ 1473070Spst#define T_TXT 16 /* text strings */ 1481539Srgrimes#define T_RP 17 /* responsible person */ 1491539Srgrimes#define T_AFSDB 18 /* AFS cell database */ 1503070Spst#define T_X25 19 /* X_25 calling address */ 1513070Spst#define T_ISDN 20 /* ISDN calling address */ 1523070Spst#define T_RT 21 /* router */ 1531539Srgrimes#define T_NSAP 22 /* NSAP address */ 1543070Spst#define T_NSAP_PTR 23 /* reverse NSAP lookup (deprecated) */ 15510132Speter#define T_SIG 24 /* security signature */ 15610132Speter#define T_KEY 25 /* security key */ 15710132Speter#define T_PX 26 /* X.400 mail mapping */ 15810132Speter#define T_GPOS 27 /* geographical position (withdrawn) */ 15910132Speter#define T_AAAA 28 /* IP6 Address */ 16010132Speter#define T_LOC 29 /* Location Information */ 1611539Srgrimes /* non standard */ 1623070Spst#define T_UINFO 100 /* user (finger) information */ 1633070Spst#define T_UID 101 /* user ID */ 1643070Spst#define T_GID 102 /* group ID */ 1653070Spst#define T_UNSPEC 103 /* Unspecified format (binary data) */ 1661539Srgrimes /* Query type values which do not appear in resource records */ 1673070Spst#define T_AXFR 252 /* transfer zone of authority */ 1683070Spst#define T_MAILB 253 /* transfer mailbox records */ 1693070Spst#define T_MAILA 254 /* transfer mail agent records */ 1703070Spst#define T_ANY 255 /* wildcard match */ 1711539Srgrimes 1721539Srgrimes/* 1731539Srgrimes * Values for class field 1741539Srgrimes */ 1751539Srgrimes 1763070Spst#define C_IN 1 /* the arpa internet */ 1773070Spst#define C_CHAOS 3 /* for chaos net (MIT) */ 1783070Spst#define C_HS 4 /* for Hesiod name server (MIT) (XXX) */ 1791539Srgrimes /* Query class values which do not appear in resource records */ 1803070Spst#define C_ANY 255 /* wildcard match */ 1811539Srgrimes 1821539Srgrimes/* 1831539Srgrimes * Status return codes for T_UNSPEC conversion routines 1841539Srgrimes */ 1853070Spst#define CONV_SUCCESS 0 1863070Spst#define CONV_OVERFLOW (-1) 1873070Spst#define CONV_BADFMT (-2) 1883070Spst#define CONV_BADCKSUM (-3) 1893070Spst#define CONV_BADBUFLEN (-4) 1901539Srgrimes 1911539Srgrimes/* 1921539Srgrimes * Structure for query header. The order of the fields is machine- and 1931539Srgrimes * compiler-dependent, depending on the byte/bit order and the layout 1941539Srgrimes * of bit fields. We use bit fields only in int variables, as this 1951539Srgrimes * is all ANSI requires. This requires a somewhat confusing rearrangement. 1961539Srgrimes */ 1971539Srgrimes 1981539Srgrimestypedef struct { 1993070Spst unsigned id :16; /* query identification number */ 2001539Srgrimes#if BYTE_ORDER == BIG_ENDIAN 2011539Srgrimes /* fields in third byte */ 2023070Spst unsigned qr: 1; /* response flag */ 2033070Spst unsigned opcode: 4; /* purpose of message */ 2043070Spst unsigned aa: 1; /* authoritive answer */ 2053070Spst unsigned tc: 1; /* truncated message */ 2063070Spst unsigned rd: 1; /* recursion desired */ 2071539Srgrimes /* fields in fourth byte */ 2083070Spst unsigned ra: 1; /* recursion available */ 20910132Speter unsigned unused :3; /* unused bits (MBZ as of 4.9.3a3) */ 2103070Spst unsigned rcode :4; /* response code */ 2111539Srgrimes#endif 2121539Srgrimes#if BYTE_ORDER == LITTLE_ENDIAN || BYTE_ORDER == PDP_ENDIAN 2131539Srgrimes /* fields in third byte */ 2143070Spst unsigned rd :1; /* recursion desired */ 2153070Spst unsigned tc :1; /* truncated message */ 2163070Spst unsigned aa :1; /* authoritive answer */ 2173070Spst unsigned opcode :4; /* purpose of message */ 2183070Spst unsigned qr :1; /* response flag */ 2191539Srgrimes /* fields in fourth byte */ 2203070Spst unsigned rcode :4; /* response code */ 22110132Speter unsigned unused :3; /* unused bits (MBZ as of 4.9.3a3) */ 2223070Spst unsigned ra :1; /* recursion available */ 2231539Srgrimes#endif 2241539Srgrimes /* remaining bytes */ 2253070Spst unsigned qdcount :16; /* number of question entries */ 2263070Spst unsigned ancount :16; /* number of answer entries */ 2273070Spst unsigned nscount :16; /* number of authority entries */ 2283070Spst unsigned arcount :16; /* number of resource entries */ 2291539Srgrimes} HEADER; 2301539Srgrimes 2311539Srgrimes/* 2321539Srgrimes * Defines for handling compressed domain names 2331539Srgrimes */ 2343070Spst#define INDIR_MASK 0xc0 2351539Srgrimes 2361539Srgrimes/* 2371539Srgrimes * Structure for passing resource records around. 2381539Srgrimes */ 2391539Srgrimesstruct rrec { 2403070Spst int16_t r_zone; /* zone number */ 2413070Spst int16_t r_class; /* class number */ 2423070Spst int16_t r_type; /* type number */ 2431539Srgrimes u_int32_t r_ttl; /* time to live */ 2443070Spst int r_size; /* size of data area */ 2453070Spst char *r_data; /* pointer to data */ 2461539Srgrimes}; 2471539Srgrimes 2483070Spstextern u_int16_t _getshort __P((const u_char *)); 2493070Spstextern u_int32_t _getlong __P((const u_char *)); 2501539Srgrimes 2511539Srgrimes/* 2521539Srgrimes * Inline versions of get/put short/long. Pointer is advanced. 2531539Srgrimes * 2541539Srgrimes * These macros demonstrate the property of C whereby it can be 2553070Spst * portable or it can be elegant but rarely both. 2561539Srgrimes */ 2573070Spst#define GETSHORT(s, cp) { \ 2581539Srgrimes register u_char *t_cp = (u_char *)(cp); \ 2593070Spst (s) = ((u_int16_t)t_cp[0] << 8) \ 2603070Spst | ((u_int16_t)t_cp[1]) \ 2613070Spst ; \ 2623070Spst (cp) += INT16SZ; \ 2631539Srgrimes} 2641539Srgrimes 2653070Spst#define GETLONG(l, cp) { \ 2661539Srgrimes register u_char *t_cp = (u_char *)(cp); \ 2673070Spst (l) = ((u_int32_t)t_cp[0] << 24) \ 2683070Spst | ((u_int32_t)t_cp[1] << 16) \ 2693070Spst | ((u_int32_t)t_cp[2] << 8) \ 2703070Spst | ((u_int32_t)t_cp[3]) \ 2713070Spst ; \ 2723070Spst (cp) += INT32SZ; \ 2731539Srgrimes} 2741539Srgrimes 2753070Spst#define PUTSHORT(s, cp) { \ 2761539Srgrimes register u_int16_t t_s = (u_int16_t)(s); \ 2771539Srgrimes register u_char *t_cp = (u_char *)(cp); \ 2781539Srgrimes *t_cp++ = t_s >> 8; \ 2791539Srgrimes *t_cp = t_s; \ 2803070Spst (cp) += INT16SZ; \ 2811539Srgrimes} 2821539Srgrimes 2833070Spst#define PUTLONG(l, cp) { \ 2841539Srgrimes register u_int32_t t_l = (u_int32_t)(l); \ 2851539Srgrimes register u_char *t_cp = (u_char *)(cp); \ 2861539Srgrimes *t_cp++ = t_l >> 24; \ 2871539Srgrimes *t_cp++ = t_l >> 16; \ 2881539Srgrimes *t_cp++ = t_l >> 8; \ 2891539Srgrimes *t_cp = t_l; \ 2903070Spst (cp) += INT32SZ; \ 2911539Srgrimes} 2921539Srgrimes 29310132Speter#endif /* !_ARPA_NAMESER_H_ */ 294