San Mehat | 5658bcb | 2010-01-20 10:16:30 -0800 | [diff] [blame] | 1 | /* $OpenBSD: nameser.h,v 1.11 2005/12/20 02:06:56 millert Exp $ */ |
| 2 | |
| 3 | /* |
| 4 | * ++Copyright++ 1983, 1989, 1993 |
| 5 | * - |
| 6 | * Copyright (c) 1983, 1989, 1993 |
| 7 | * The Regents of the University of California. All rights reserved. |
| 8 | * |
| 9 | * Redistribution and use in source and binary forms, with or without |
| 10 | * modification, are permitted provided that the following conditions |
| 11 | * are met: |
| 12 | * 1. Redistributions of source code must retain the above copyright |
| 13 | * notice, this list of conditions and the following disclaimer. |
| 14 | * 2. Redistributions in binary form must reproduce the above copyright |
| 15 | * notice, this list of conditions and the following disclaimer in the |
| 16 | * documentation and/or other materials provided with the distribution. |
| 17 | * 3. Neither the name of the University nor the names of its contributors |
| 18 | * may be used to endorse or promote products derived from this software |
| 19 | * without specific prior written permission. |
| 20 | * |
| 21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 31 | * SUCH DAMAGE. |
| 32 | * - |
| 33 | * Portions Copyright (c) 1993 by Digital Equipment Corporation. |
| 34 | * |
| 35 | * Permission to use, copy, modify, and distribute this software for any |
| 36 | * purpose with or without fee is hereby granted, provided that the above |
| 37 | * copyright notice and this permission notice appear in all copies, and that |
| 38 | * the name of Digital Equipment Corporation not be used in advertising or |
| 39 | * publicity pertaining to distribution of the document or software without |
| 40 | * specific, written prior permission. |
| 41 | * |
| 42 | * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL |
| 43 | * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES |
| 44 | * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT |
| 45 | * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL |
| 46 | * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR |
| 47 | * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS |
| 48 | * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS |
| 49 | * SOFTWARE. |
| 50 | * - |
| 51 | * Portions Copyright (c) 1995 by International Business Machines, Inc. |
| 52 | * |
| 53 | * International Business Machines, Inc. (hereinafter called IBM) grants |
| 54 | * permission under its copyrights to use, copy, modify, and distribute this |
| 55 | * Software with or without fee, provided that the above copyright notice and |
| 56 | * all paragraphs of this notice appear in all copies, and that the name of IBM |
| 57 | * not be used in connection with the marketing of any product incorporating |
| 58 | * the Software or modifications thereof, without specific, written prior |
| 59 | * permission. |
| 60 | * |
| 61 | * To the extent it has a right to do so, IBM grants an immunity from suit |
| 62 | * under its patents, if any, for the use, sale or manufacture of products to |
| 63 | * the extent that such products are used for performing Domain Name System |
| 64 | * dynamic updates in TCP/IP networks by means of the Software. No immunity is |
| 65 | * granted for any product per se or for any other function of any product. |
| 66 | * |
| 67 | * THE SOFTWARE IS PROVIDED "AS IS", AND IBM DISCLAIMS ALL WARRANTIES, |
| 68 | * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A |
| 69 | * PARTICULAR PURPOSE. IN NO EVENT SHALL IBM BE LIABLE FOR ANY SPECIAL, |
| 70 | * DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER ARISING |
| 71 | * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE, EVEN |
| 72 | * IF IBM IS APPRISED OF THE POSSIBILITY OF SUCH DAMAGES. |
| 73 | * --Copyright-- |
| 74 | */ |
| 75 | |
| 76 | /* |
| 77 | * @(#)nameser.h 8.1 (Berkeley) 6/2/93 |
| 78 | * $From: nameser.h,v 8.11 1996/10/08 04:51:02 vixie Exp $ |
| 79 | */ |
| 80 | |
| 81 | #ifndef _NAMESER_H_ |
| 82 | #define _NAMESER_H_ |
| 83 | |
| 84 | #include <sys/cdefs.h> |
| 85 | #include <sys/param.h> |
| 86 | |
| 87 | /* |
| 88 | * revision information. this is the release date in YYYYMMDD format. |
| 89 | * it can change every day so the right thing to do with it is use it |
| 90 | * in preprocessor commands such as "#if (__BIND > 19931104)". do not |
| 91 | * compare for equality; rather, use it to determine whether your resolver |
| 92 | * is new enough to contain a certain feature. |
| 93 | */ |
| 94 | |
| 95 | #define __BIND 19960801 /* interface version stamp */ |
| 96 | |
| 97 | /* |
| 98 | * Define constants based on rfc883 |
| 99 | */ |
| 100 | #define PACKETSZ 512 /* maximum packet size */ |
| 101 | #define MAXDNAME 1025 /* maximum presentation domain name */ |
| 102 | #define MAXCDNAME 255 /* maximum compressed domain name */ |
| 103 | #define MAXLABEL 63 /* maximum length of domain label */ |
| 104 | #define HFIXEDSZ 12 /* #/bytes of fixed data in header */ |
| 105 | #define QFIXEDSZ 4 /* #/bytes of fixed data in query */ |
| 106 | #define RRFIXEDSZ 10 /* #/bytes of fixed data in r record */ |
| 107 | #define INT32SZ 4 /* for systems without 32-bit ints */ |
| 108 | #define INT16SZ 2 /* for systems without 16-bit ints */ |
| 109 | #define INADDRSZ 4 /* IPv4 T_A */ |
| 110 | #define IN6ADDRSZ 16 /* IPv6 T_AAAA */ |
| 111 | |
| 112 | /* |
| 113 | * Internet nameserver port number |
| 114 | */ |
| 115 | #define NAMESERVER_PORT 53 |
| 116 | |
| 117 | /* |
| 118 | * Currently defined opcodes |
| 119 | */ |
| 120 | #define QUERY 0x0 /* standard query */ |
| 121 | #define IQUERY 0x1 /* inverse query */ |
| 122 | #define STATUS 0x2 /* nameserver status query */ |
| 123 | /*#define xxx 0x3*/ /* 0x3 reserved */ |
| 124 | #define NS_NOTIFY_OP 0x4 /* notify secondary of SOA change */ |
| 125 | /* |
| 126 | * Currently defined response codes |
| 127 | */ |
| 128 | #define NOERROR 0 /* no error */ |
| 129 | #define FORMERR 1 /* format error */ |
| 130 | #define SERVFAIL 2 /* server failure */ |
| 131 | #define NXDOMAIN 3 /* non existent domain */ |
| 132 | #define NOTIMP 4 /* not implemented */ |
| 133 | #define REFUSED 5 /* query refused */ |
| 134 | |
| 135 | /* |
| 136 | * Type values for resources and queries |
| 137 | */ |
| 138 | #define T_A 1 /* host address */ |
| 139 | #define T_NS 2 /* authoritative server */ |
| 140 | #define T_MD 3 /* mail destination */ |
| 141 | #define T_MF 4 /* mail forwarder */ |
| 142 | #define T_CNAME 5 /* canonical name */ |
| 143 | #define T_SOA 6 /* start of authority zone */ |
| 144 | #define T_MB 7 /* mailbox domain name */ |
| 145 | #define T_MG 8 /* mail group member */ |
| 146 | #define T_MR 9 /* mail rename name */ |
| 147 | #define T_NULL 10 /* null resource record */ |
| 148 | #define T_WKS 11 /* well known service */ |
| 149 | #define T_PTR 12 /* domain name pointer */ |
| 150 | #define T_HINFO 13 /* host information */ |
| 151 | #define T_MINFO 14 /* mailbox information */ |
| 152 | #define T_MX 15 /* mail routing information */ |
| 153 | #define T_TXT 16 /* text strings */ |
| 154 | #define T_RP 17 /* responsible person */ |
| 155 | #define T_AFSDB 18 /* AFS cell database */ |
| 156 | #define T_X25 19 /* X_25 calling address */ |
| 157 | #define T_ISDN 20 /* ISDN calling address */ |
| 158 | #define T_RT 21 /* router */ |
| 159 | #define T_NSAP 22 /* NSAP address */ |
| 160 | #define T_NSAP_PTR 23 /* reverse NSAP lookup (deprecated) */ |
| 161 | #define T_SIG 24 /* security signature */ |
| 162 | #define T_KEY 25 /* security key */ |
| 163 | #define T_PX 26 /* X.400 mail mapping */ |
| 164 | #define T_GPOS 27 /* geographical position (withdrawn) */ |
| 165 | #define T_AAAA 28 /* IP6 Address */ |
| 166 | #define T_LOC 29 /* Location Information */ |
| 167 | #define T_NXT 30 /* Next Valid Name in Zone */ |
| 168 | #define T_EID 31 /* Endpoint identifier */ |
| 169 | #define T_NIMLOC 32 /* Nimrod locator */ |
| 170 | #define T_SRV 33 /* Server selection */ |
| 171 | #define T_ATMA 34 /* ATM Address */ |
| 172 | #define T_NAPTR 35 /* Naming Authority PoinTeR */ |
| 173 | #define T_KX 36 /* Key Exchanger */ |
| 174 | #define T_CERT 37 /* CERT */ |
| 175 | #define T_A6 38 /* A6 */ |
| 176 | #define T_DNAME 39 /* DNAME */ |
| 177 | #define T_SINK 40 /* SINK */ |
| 178 | #define T_OPT 41 /* OPT pseudo-RR, RFC2671 */ |
| 179 | #define T_APL 42 /* APL */ |
| 180 | #define T_DS 43 /* Delegation Signer */ |
| 181 | #define T_SSHFP 44 /* SSH Key Fingerprint */ |
| 182 | #define T_RRSIG 46 /* RRSIG */ |
| 183 | #define T_NSEC 47 /* NSEC */ |
| 184 | #define T_DNSKEY 48 /* DNSKEY */ |
| 185 | /* non standard */ |
| 186 | #define T_UINFO 100 /* user (finger) information */ |
| 187 | #define T_UID 101 /* user ID */ |
| 188 | #define T_GID 102 /* group ID */ |
| 189 | #define T_UNSPEC 103 /* Unspecified format (binary data) */ |
| 190 | /* Query type values which do not appear in resource records */ |
| 191 | #define T_TKEY 249 /* Transaction Key */ |
| 192 | #define T_TSIG 250 /* Transaction Signature */ |
| 193 | #define T_IXFR 251 /* incremental zone transfer */ |
| 194 | #define T_AXFR 252 /* transfer zone of authority */ |
| 195 | #define T_MAILB 253 /* transfer mailbox records */ |
| 196 | #define T_MAILA 254 /* transfer mail agent records */ |
| 197 | #define T_ANY 255 /* wildcard match */ |
| 198 | |
| 199 | /* |
| 200 | * Values for class field |
| 201 | */ |
| 202 | |
| 203 | #define C_IN 1 /* the arpa internet */ |
| 204 | #define C_CHAOS 3 /* for chaos net (MIT) */ |
| 205 | #define C_HS 4 /* for Hesiod name server (MIT) (XXX) */ |
| 206 | /* Query class values which do not appear in resource records */ |
| 207 | #define C_ANY 255 /* wildcard match */ |
| 208 | |
| 209 | /* |
| 210 | * Flags field of the KEY RR rdata |
| 211 | */ |
| 212 | #define KEYFLAG_TYPEMASK 0xC000 /* Mask for "type" bits */ |
| 213 | #define KEYFLAG_TYPE_AUTH_CONF 0x0000 /* Key usable for both */ |
| 214 | #define KEYFLAG_TYPE_CONF_ONLY 0x8000 /* Key usable for confidentiality */ |
| 215 | #define KEYFLAG_TYPE_AUTH_ONLY 0x4000 /* Key usable for authentication */ |
| 216 | #define KEYFLAG_TYPE_NO_KEY 0xC000 /* No key usable for either; no key */ |
| 217 | /* The type bits can also be interpreted independently, as single bits: */ |
| 218 | #define KEYFLAG_NO_AUTH 0x8000 /* Key not usable for authentication */ |
| 219 | #define KEYFLAG_NO_CONF 0x4000 /* Key not usable for confidentiality */ |
| 220 | |
| 221 | #define KEYFLAG_EXPERIMENTAL 0x2000 /* Security is *mandatory* if bit=0 */ |
| 222 | #define KEYFLAG_RESERVED3 0x1000 /* reserved - must be zero */ |
| 223 | #define KEYFLAG_RESERVED4 0x0800 /* reserved - must be zero */ |
| 224 | #define KEYFLAG_USERACCOUNT 0x0400 /* key is assoc. with a user acct */ |
| 225 | #define KEYFLAG_ENTITY 0x0200 /* key is assoc. with entity eg host */ |
| 226 | #define KEYFLAG_ZONEKEY 0x0100 /* key is zone key for the zone named */ |
| 227 | #define KEYFLAG_IPSEC 0x0080 /* key is for IPSEC use (host or user)*/ |
| 228 | #define KEYFLAG_EMAIL 0x0040 /* key is for email (MIME security) */ |
| 229 | #define KEYFLAG_RESERVED10 0x0020 /* reserved - must be zero */ |
| 230 | #define KEYFLAG_RESERVED11 0x0010 /* reserved - must be zero */ |
| 231 | #define KEYFLAG_SIGNATORYMASK 0x000F /* key can sign DNS RR's of same name */ |
| 232 | |
| 233 | #define KEYFLAG_RESERVED_BITMASK ( KEYFLAG_RESERVED3 | \ |
| 234 | KEYFLAG_RESERVED4 | \ |
| 235 | KEYFLAG_RESERVED10| KEYFLAG_RESERVED11) |
| 236 | |
| 237 | /* The Algorithm field of the KEY and SIG RR's is an integer, {1..254} */ |
| 238 | #define ALGORITHM_MD5RSA 1 /* MD5 with RSA */ |
| 239 | #define ALGORITHM_EXPIRE_ONLY 253 /* No alg, no security */ |
| 240 | #define ALGORITHM_PRIVATE_OID 254 /* Key begins with OID indicating alg */ |
| 241 | |
| 242 | /* Signatures */ |
| 243 | /* Size of a mod or exp in bits */ |
| 244 | #define MIN_MD5RSA_KEY_PART_BITS 512 |
| 245 | #define MAX_MD5RSA_KEY_PART_BITS 2552 |
| 246 | /* Total of binary mod and exp, bytes */ |
| 247 | #define MAX_MD5RSA_KEY_BYTES ((MAX_MD5RSA_KEY_PART_BITS+7/8)*2+3) |
| 248 | /* Max length of text sig block */ |
| 249 | #define MAX_KEY_BASE64 (((MAX_MD5RSA_KEY_BYTES+2)/3)*4) |
| 250 | |
| 251 | /* |
| 252 | * EDNS0 Z-field extended flags |
| 253 | */ |
| 254 | #define DNS_MESSAGEEXTFLAG_DO 0x8000U |
| 255 | |
| 256 | /* |
| 257 | * Status return codes for T_UNSPEC conversion routines |
| 258 | */ |
| 259 | #define CONV_SUCCESS 0 |
| 260 | #define CONV_OVERFLOW (-1) |
| 261 | #define CONV_BADFMT (-2) |
| 262 | #define CONV_BADCKSUM (-3) |
| 263 | #define CONV_BADBUFLEN (-4) |
| 264 | |
| 265 | #if !defined(_BYTE_ORDER) || \ |
| 266 | (_BYTE_ORDER != _BIG_ENDIAN && _BYTE_ORDER != _LITTLE_ENDIAN && \ |
| 267 | _BYTE_ORDER != _PDP_ENDIAN) |
| 268 | /* you must determine what the correct bit order is for |
| 269 | * your compiler - the next line is an intentional error |
| 270 | * which will force your compiles to bomb until you fix |
| 271 | * the above macros. |
| 272 | */ |
| 273 | #error "Undefined or invalid _BYTE_ORDER"; |
| 274 | #endif |
| 275 | |
| 276 | /* |
| 277 | * Structure for query header. The order of the fields is machine- and |
| 278 | * compiler-dependent, depending on the byte/bit order and the layout |
| 279 | * of bit fields. We use bit fields only in int variables, as this |
| 280 | * is all ANSI requires. This requires a somewhat confusing rearrangement. |
| 281 | */ |
| 282 | |
| 283 | typedef struct { |
| 284 | unsigned id :16; /* query identification number */ |
| 285 | #if _BYTE_ORDER == _BIG_ENDIAN |
| 286 | /* fields in third byte */ |
| 287 | unsigned qr: 1; /* response flag */ |
| 288 | unsigned opcode: 4; /* purpose of message */ |
| 289 | unsigned aa: 1; /* authoritive answer */ |
| 290 | unsigned tc: 1; /* truncated message */ |
| 291 | unsigned rd: 1; /* recursion desired */ |
| 292 | /* fields in fourth byte */ |
| 293 | unsigned ra: 1; /* recursion available */ |
| 294 | unsigned unused :1; /* unused bits (MBZ as of 4.9.3a3) */ |
| 295 | unsigned ad: 1; /* authentic data from named */ |
| 296 | unsigned cd: 1; /* checking disabled by resolver */ |
| 297 | unsigned rcode :4; /* response code */ |
| 298 | #endif |
| 299 | #if _BYTE_ORDER == _LITTLE_ENDIAN || _BYTE_ORDER == _PDP_ENDIAN |
| 300 | /* fields in third byte */ |
| 301 | unsigned rd :1; /* recursion desired */ |
| 302 | unsigned tc :1; /* truncated message */ |
| 303 | unsigned aa :1; /* authoritive answer */ |
| 304 | unsigned opcode :4; /* purpose of message */ |
| 305 | unsigned qr :1; /* response flag */ |
| 306 | /* fields in fourth byte */ |
| 307 | unsigned rcode :4; /* response code */ |
| 308 | unsigned cd: 1; /* checking disabled by resolver */ |
| 309 | unsigned ad: 1; /* authentic data from named */ |
| 310 | unsigned unused :1; /* unused bits (MBZ as of 4.9.3a3) */ |
| 311 | unsigned ra :1; /* recursion available */ |
| 312 | #endif |
| 313 | /* remaining bytes */ |
| 314 | unsigned qdcount :16; /* number of question entries */ |
| 315 | unsigned ancount :16; /* number of answer entries */ |
| 316 | unsigned nscount :16; /* number of authority entries */ |
| 317 | unsigned arcount :16; /* number of resource entries */ |
| 318 | } HEADER; |
| 319 | |
| 320 | /* |
| 321 | * Defines for handling compressed domain names |
| 322 | */ |
| 323 | #define INDIR_MASK 0xc0 |
| 324 | |
| 325 | extern u_int16_t _getshort(const unsigned char *); |
| 326 | extern u_int32_t _getlong(const unsigned char *); |
| 327 | |
| 328 | /* |
| 329 | * Inline versions of get/put short/long. Pointer is advanced. |
| 330 | * |
| 331 | * These macros demonstrate the property of C whereby it can be |
| 332 | * portable or it can be elegant but rarely both. |
| 333 | */ |
| 334 | #define GETSHORT(s, cp) { \ |
| 335 | unsigned char *t_cp = (unsigned char *)(cp); \ |
| 336 | (s) = ((u_int16_t)t_cp[0] << 8) \ |
| 337 | | ((u_int16_t)t_cp[1]) \ |
| 338 | ; \ |
| 339 | (cp) += INT16SZ; \ |
| 340 | } |
| 341 | |
| 342 | #define GETLONG(l, cp) { \ |
| 343 | unsigned char *t_cp = (unsigned char *)(cp); \ |
| 344 | (l) = ((u_int32_t)t_cp[0] << 24) \ |
| 345 | | ((u_int32_t)t_cp[1] << 16) \ |
| 346 | | ((u_int32_t)t_cp[2] << 8) \ |
| 347 | | ((u_int32_t)t_cp[3]) \ |
| 348 | ; \ |
| 349 | (cp) += INT32SZ; \ |
| 350 | } |
| 351 | |
| 352 | #define PUTSHORT(s, cp) { \ |
| 353 | u_int16_t t_s = (u_int16_t)(s); \ |
| 354 | unsigned char *t_cp = (unsigned char *)(cp); \ |
| 355 | *t_cp++ = t_s >> 8; \ |
| 356 | *t_cp = t_s; \ |
| 357 | (cp) += INT16SZ; \ |
| 358 | } |
| 359 | |
| 360 | #define PUTLONG(l, cp) { \ |
| 361 | u_int32_t t_l = (u_int32_t)(l); \ |
| 362 | unsigned char *t_cp = (unsigned char *)(cp); \ |
| 363 | *t_cp++ = t_l >> 24; \ |
| 364 | *t_cp++ = t_l >> 16; \ |
| 365 | *t_cp++ = t_l >> 8; \ |
| 366 | *t_cp = t_l; \ |
| 367 | (cp) += INT32SZ; \ |
| 368 | } |
| 369 | |
| 370 | #endif /* !_NAMESER_H_ */ |