/*++ Copyright (c) 1991 Microsoft Corporation Module Name: nameser.h Abstract: Definitions for the DNS resolver and nameserver. Author: Mike Massa (mikemas) Jan 31, 1992 Revision History: Who When What -------- -------- ---------------------------------------------- mikemas 01-31-92 created Notes: --*/ /****************************************************************** * * SpiderTCP BIND * * Copyright 1990 Spider Systems Limited * * NAMESER.H * ******************************************************************/ /* * /usr/projects/tcp/SCCS.rel3/rel/src/include/arpa/0/s.nameser.h * @(#)nameser.h 5.3 * * Last delta created 14:06:04 3/4/91 * This file extracted 11:19:28 3/8/91 * * Modifications: * * GSS 20 Jul 90 New File */ /* * Copyright (c) 1983, 1989 Regents of the University of California. * All rights reserved. * * Redistribution and use in source and binary forms are permitted * provided that: (1) source distributions retain this entire copyright * notice and comment, and (2) distributions including binaries display * the following acknowledgement: ``This product includes software * developed by the University of California, Berkeley and its contributors'' * in the documentation or other materials provided with the distribution * and in all advertising materials mentioning features or use of this * software. 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 ``AS IS'' AND WITHOUT ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. * * @(#)nameser.h 5.24 (Berkeley) 6/1/90 */ #ifndef _NAMESER_INCLUDED #define _NAMESER_INCLUDED /* * 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 */ /*#define xxx 0x3 /* 0x3 reserved */ /* non standard */ #define UPDATEA 0x9 /* add resource record */ #define UPDATED 0xa /* delete a specific resource record */ #define UPDATEDA 0xb /* delete all nemed 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 */ #ifndef NOERROR #define NOERROR 0 /* no error */ #endif #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_AFSDB 18 /* AFS database servers */ /* 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 at MIT */ #define C_HS 4 /* for Hesiod name server at MIT */ /* 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 #ifndef BYTE_ORDER #define LITTLE_ENDIAN 1234 /* least-significant byte first (vax) */ #define BIG_ENDIAN 4321 /* most-significant byte first (IBM, net) */ #define PDP_ENDIAN 3412 /* LSB first in word, MSW first in long (pdp) */ #if defined(vax) || defined(ns32000) || defined(sun386) || defined(MIPSEL) || \ defined(BIT_ZERO_ON_RIGHT) #define BYTE_ORDER LITTLE_ENDIAN #endif #if defined(sel) || defined(pyr) || defined(mc68000) || defined(sparc) || \ defined(is68k) || defined(tahoe) || defined(ibm032) || defined(ibm370) || \ defined(MIPSEB) || defined (BIT_ZERO_ON_LEFT) #define BYTE_ORDER BIG_ENDIAN #endif #ifndef BYTE_ORDER /* still not defined */ #if defined(u3b2) || defined(m68k) #define BYTE_ORDER BIG_ENDIAN #endif #if defined(i286) || defined(i386) || defined(_MIPS_) || defined(_ALPHA_) || defined(_PPC_) #define BYTE_ORDER LITTLE_ENDIAN #endif #endif /* ~BYTE_ORDER */ #endif /* BYTE_ORDER */ #ifndef BYTE_ORDER /* you must determine what the correct bit order is for your compiler */ UNDEFINED_BIT_ORDER; #endif /* * Structure for query header, the order of the fields is machine and * compiler dependent, in our case, the bits within a byte are assignd * least significant first, while the order of transmition is most * significant first. This requires a somewhat confusing rearrangement. */ typedef struct { unsigned short id; /* query identification number */ #if BYTE_ORDER == BIG_ENDIAN /* fields in third byte */ unsigned char qr:1; /* response flag */ unsigned char opcode:4; /* purpose of message */ unsigned char aa:1; /* authoritive answer */ unsigned char tc:1; /* truncated message */ unsigned char rd:1; /* recursion desired */ /* fields in fourth byte */ unsigned char ra:1; /* recursion available */ unsigned char pr:1; /* primary server required (non standard) */ unsigned char unused:2; /* unused bits */ unsigned char rcode:4; /* response code */ #endif #if BYTE_ORDER == LITTLE_ENDIAN || BYTE_ORDER == PDP_ENDIAN /* fields in third byte */ unsigned char rd:1; /* recursion desired */ unsigned char tc:1; /* truncated message */ unsigned char aa:1; /* authoritive answer */ unsigned char opcode:4; /* purpose of message */ unsigned char qr:1; /* response flag */ /* fields in fourth byte */ unsigned char rcode:4; /* response code */ unsigned char unused:2; /* unused bits */ unsigned char pr:1; /* primary server required (non standard) */ unsigned char ra:1; /* recursion available */ #endif /* remaining bytes */ unsigned short qdcount; /* number of question entries */ unsigned short ancount; /* number of answer entries */ unsigned short nscount; /* number of authority entries */ unsigned short arcount; /* number of resource entries */ } HEADER; /* * Defines for handling compressed domain names */ #define INDIR_MASK 0xc0 /* * Structure for passing resource records around. */ struct rrec { short r_zone; /* zone number */ short r_class; /* class number */ short r_type; /* type number */ unsigned long r_ttl; /* time to live */ int r_size; /* size of data area */ char *r_data; /* pointer to data */ }; extern unsigned short _getshort(); extern unsigned long _getlong(); /* * Inline versions of get/put short/long. * Pointer is advanced; we assume that both arguments * are lvalues and will already be in registers. * cp MUST be unsigned char *. */ #define GETSHORT(s, cp) { \ (s) = *(cp)++ << 8; \ (s) |= *(cp)++; \ } #define GETLONG(l, cp) { \ (l) = *(cp)++ << 8; \ (l) |= *(cp)++; (l) <<= 8; \ (l) |= *(cp)++; (l) <<= 8; \ (l) |= *(cp)++; \ } #define PUTSHORT(s, cp) { \ *(cp)++ = (s) >> 8; \ *(cp)++ = (s); \ } /* * Warning: PUTLONG destroys its first argument. */ #define PUTLONG(l, cp) { \ (cp)[3] = l; \ (cp)[2] = (l >>= 8); \ (cp)[1] = (l >>= 8); \ (cp)[0] = l >> 8; \ (cp) += sizeof(unsigned long); \ } #endif // _NAMESER_INCLUDED