1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 1994 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */ 28 /* All Rights Reserved */ 29 30 /* 31 * Portions of this source code were derived from Berkeley 4.3 BSD 32 * under license from the Regents of the University of California. 33 */ 34 35 #ifndef _ARPA_NAMESER_H 36 #define _ARPA_NAMESER_H 37 38 #include <sys/isa_defs.h> 39 40 #ifdef __cplusplus 41 extern "C" { 42 #endif 43 44 /* 45 * Define constants based on rfc883 46 */ 47 #define PACKETSZ 512 /* maximum packet size */ 48 #define MAXDNAME 256 /* maximum domain name */ 49 #define MAXCDNAME 255 /* maximum compressed domain name */ 50 #define MAXLABEL 63 /* maximum length of domain label */ 51 /* Number of bytes of fixed size data in query structure */ 52 #define QFIXEDSZ 4 53 /* number of bytes of fixed size data in resource record */ 54 #define RRFIXEDSZ 10 55 56 /* 57 * Internet nameserver port number 58 */ 59 #define NAMESERVER_PORT 53 60 61 /* 62 * Currently defined opcodes 63 */ 64 #define QUERY 0x0 /* standard query */ 65 #define IQUERY 0x1 /* inverse query */ 66 #define STATUS 0x2 /* nameserver status query */ 67 /* #define xxx 0x3 */ /* 0x3 reserved */ 68 /* non standard */ 69 #define UPDATEA 0x9 /* add resource record */ 70 #define UPDATED 0xa /* delete a specific resource record */ 71 #define UPDATEDA 0xb /* delete all nemed resource record */ 72 #define UPDATEM 0xc /* modify a specific resource record */ 73 #define UPDATEMA 0xd /* modify all named resource record */ 74 75 #define ZONEINIT 0xe /* initial zone transfer */ 76 #define ZONEREF 0xf /* incremental zone referesh */ 77 78 /* 79 * Currently defined response codes 80 */ 81 #define NOERROR 0 /* no error */ 82 #define FORMERR 1 /* format error */ 83 #define SERVFAIL 2 /* server failure */ 84 #define NXDOMAIN 3 /* non existent domain */ 85 #define NOTIMP 4 /* not implemented */ 86 #define REFUSED 5 /* query refused */ 87 /* non standard */ 88 #define NOCHANGE 0xf /* update failed to change db */ 89 90 /* 91 * Type values for resources and queries 92 */ 93 #define T_A 1 /* host address */ 94 #define T_NS 2 /* authoritative server */ 95 #define T_MD 3 /* mail destination */ 96 #define T_MF 4 /* mail forwarder */ 97 #define T_CNAME 5 /* connonical name */ 98 #define T_SOA 6 /* start of authority zone */ 99 #define T_MB 7 /* mailbox domain name */ 100 #define T_MG 8 /* mail group member */ 101 #define T_MR 9 /* mail rename name */ 102 #define T_NULL 10 /* null resource record */ 103 #define T_WKS 11 /* well known service */ 104 #define T_PTR 12 /* domain name pointer */ 105 #define T_HINFO 13 /* host information */ 106 #define T_MINFO 14 /* mailbox information */ 107 #define T_MX 15 /* mail routing information */ 108 #define T_TXT 16 /* text strings */ 109 /* non standard */ 110 #define T_UINFO 100 /* user (finger) information */ 111 #define T_UID 101 /* user ID */ 112 #define T_GID 102 /* group ID */ 113 #define T_UNSPEC 103 /* Unspecified format (binary data) */ 114 /* Query type values which do not appear in resource records */ 115 #define T_AXFR 252 /* transfer zone of authority */ 116 #define T_MAILB 253 /* transfer mailbox records */ 117 #define T_MAILA 254 /* transfer mail agent records */ 118 #define T_ANY 255 /* wildcard match */ 119 120 /* 121 * Values for class field 122 */ 123 124 #define C_IN 1 /* the arpa internet */ 125 #define C_CHAOS 3 /* for chaos net at MIT */ 126 #define C_HS 4 /* for Hesiod name server at MIT */ 127 /* Query class values which do not appear in resource records */ 128 #define C_ANY 255 /* wildcard match */ 129 130 /* 131 * Status return codes for T_UNSPEC conversion routines 132 */ 133 #define CONV_SUCCESS 0 134 #define CONV_OVERFLOW -1 135 #define CONV_BADFMT -2 136 #define CONV_BADCKSUM -3 137 #define CONV_BADBUFLEN -4 138 139 /* 140 * Structure for query header, the order of the fields is machine and 141 * compiler dependent, in our case, the bits within a byte are assignd 142 * least significant first, while the order of transmition is most 143 * significant first. This requires a somewhat confusing rearrangement. 144 */ 145 146 typedef struct { 147 u_short id; /* query identification number */ 148 #if defined(_BIT_FIELDS_HTOL) || defined(BIT_ZERO_ON_LEFT) 149 /* Bit zero on left: SPARC and similar architectures */ 150 /* fields in third byte */ 151 u_char qr:1; /* response flag */ 152 u_char opcode:4; /* purpose of message */ 153 u_char aa:1; /* authoritive answer */ 154 u_char tc:1; /* truncated message */ 155 u_char rd:1; /* recursion desired */ 156 /* fields in fourth byte */ 157 u_char ra:1; /* recursion available */ 158 u_char pr:1; /* primary server required (non standard) */ 159 u_char unused:2; /* unused bits */ 160 u_char rcode:4; /* response code */ 161 #else 162 #if defined(_BIT_FIELDS_LTOH) || defined(BIT_ZERO_ON_RIGHT) 163 /* Bit zero on right: Intel x86 and similar architectures */ 164 /* fields in third byte */ 165 u_char rd:1; /* recursion desired */ 166 u_char tc:1; /* truncated message */ 167 u_char aa:1; /* authoritive answer */ 168 u_char opcode:4; /* purpose of message */ 169 u_char qr:1; /* response flag */ 170 /* fields in fourth byte */ 171 u_char rcode:4; /* response code */ 172 u_char unused:2; /* unused bits */ 173 u_char pr:1; /* primary server required (non standard) */ 174 u_char ra:1; /* recursion available */ 175 #else 176 /* you must determine what the correct bit order is for your compiler */ 177 UNDEFINED_BIT_ORDER; 178 #endif 179 #endif 180 /* remaining bytes */ 181 u_short qdcount; /* number of question entries */ 182 u_short ancount; /* number of answer entries */ 183 u_short nscount; /* number of authority entries */ 184 u_short arcount; /* number of resource entries */ 185 } HEADER; 186 187 /* 188 * Defines for handling compressed domain names 189 */ 190 #define INDIR_MASK 0xc0 191 192 /* 193 * Structure for passing resource records around. 194 */ 195 struct rrec { 196 short r_zone; /* zone number */ 197 short r_class; /* class number */ 198 short r_type; /* type number */ 199 u_long r_ttl; /* time to live */ 200 int r_size; /* size of data area */ 201 char *r_data; /* pointer to data */ 202 }; 203 204 extern u_short _getshort(); 205 extern u_long _getlong(); 206 207 /* 208 * Inline versions of get/put short/long. 209 * Pointer is advanced; we assume that both arguments 210 * are lvalues and will already be in registers. 211 * cp MUST be u_char *. 212 */ 213 #define GETSHORT(s, cp) { \ 214 (s) = *(cp)++ << 8; \ 215 (s) |= *(cp)++; \ 216 } 217 218 #define GETLONG(l, cp) { \ 219 (l) = *(cp)++ << 8; \ 220 (l) |= *(cp)++; (l) <<= 8; \ 221 (l) |= *(cp)++; (l) <<= 8; \ 222 (l) |= *(cp)++; \ 223 } 224 225 226 #define PUTSHORT(s, cp) { \ 227 *(cp)++ = (s) >> 8; \ 228 *(cp)++ = (s); \ 229 } 230 231 /* 232 * Warning: PUTLONG destroys its first argument. 233 */ 234 #define PUTLONG(l, cp) { \ 235 (cp)[3] = l; \ 236 (cp)[2] = (l >>= 8); \ 237 (cp)[1] = (l >>= 8); \ 238 (cp)[0] = l >> 8; \ 239 (cp) += sizeof (u_long); \ 240 } 241 242 #ifdef __cplusplus 243 } 244 #endif 245 246 #endif /* _ARPA_NAMESER_H */ 247