1 /* 2 * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 3 * Use is subject to license terms. 4 * 5 * Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T 6 * All Rights Reserved 7 * 8 * Portions of this source code were derived from Berkeley 9 * 4.3 BSD under license from the regents of the University of 10 * California. 11 */ 12 13 /* 14 * BIND 4.9.4: 15 */ 16 17 /* 18 * Portions Copyright (c) 1993 by Digital Equipment Corporation. 19 * 20 * Permission to use, copy, modify, and distribute this software for any 21 * purpose with or without fee is hereby granted, provided that the above 22 * copyright notice and this permission notice appear in all copies, and that 23 * the name of Digital Equipment Corporation not be used in advertising or 24 * publicity pertaining to distribution of the document or software without 25 * specific, written prior permission. 26 * 27 * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL 28 * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES 29 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT 30 * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL 31 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR 32 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS 33 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS 34 * SOFTWARE. 35 * --Copyright-- 36 * 37 * End BIND 4.9.4 38 */ 39 40 /* 41 * Copyright (c) 1983, 1987, 1989 42 * The Regents of the University of California. All rights reserved. 43 * 44 * Redistribution and use in source and binary forms, with or without 45 * modification, are permitted provided that the following conditions 46 * are met: 47 * 1. Redistributions of source code must retain the above copyright 48 * notice, this list of conditions and the following disclaimer. 49 * 2. Redistributions in binary form must reproduce the above copyright 50 * notice, this list of conditions and the following disclaimer in the 51 * documentation and/or other materials provided with the distribution. 52 * 3. All advertising materials mentioning features or use of this software 53 * must display the following acknowledgement: 54 * This product includes software developed by the University of 55 * California, Berkeley and its contributors. 56 * 4. Neither the name of the University nor the names of its contributors 57 * may be used to endorse or promote products derived from this software 58 * without specific prior written permission. 59 * 60 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 61 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 62 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 63 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 64 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 65 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 66 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 67 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 68 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 69 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 70 * SUCH DAMAGE. 71 */ 72 73 /* 74 * Portions Copyright (c) 1996-1999 by Internet Software Consortium. 75 * 76 * Permission to use, copy, modify, and distribute this software for any 77 * purpose with or without fee is hereby granted, provided that the above 78 * copyright notice and this permission notice appear in all copies. 79 * 80 * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS 81 * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES 82 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE 83 * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL 84 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR 85 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS 86 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS 87 * SOFTWARE. 88 */ 89 90 /* 91 * @(#)resolv.h 8.1 (Berkeley) 6/2/93 92 * $Id: resolv.h,v 8.52 2003/04/29 02:27:03 marka Exp $ 93 */ 94 95 #ifndef _RESOLV_H_ 96 #define _RESOLV_H_ 97 98 #pragma ident "%Z%%M% %I% %E% SMI" 99 100 #include <sys/param.h> 101 102 #include <stdio.h> 103 #include <arpa/nameser.h> 104 #include <sys/socket.h> 105 106 #ifdef __cplusplus 107 extern "C" { 108 #endif 109 110 /* 111 * Revision information. This is the release date in YYYYMMDD format. 112 * It can change every day so the right thing to do with it is use it 113 * in preprocessor commands such as "#if (__RES > 19931104)". Do not 114 * compare for equality; rather, use it to determine whether your resolver 115 * is new enough to contain a certain feature. 116 */ 117 118 #define __RES 20030124 119 120 #define RES_SET_H_ERRNO(r, x) __h_errno_set(r, x) 121 struct __res_state; /* forward */ 122 123 void __h_errno_set(struct __res_state *res, int err); 124 125 /* 126 * Resolver configuration file. 127 * Normally not present, but may contain the address of the 128 * initial name server(s) to query and the domain search list. 129 */ 130 131 #ifndef _PATH_RESCONF 132 #define _PATH_RESCONF "/etc/resolv.conf" 133 #endif 134 135 #ifdef __STDC__ 136 #ifndef __P 137 #define __P(x) x 138 #endif 139 #else 140 #ifndef __P 141 #define __P(x) () 142 #endif 143 #endif /* __STDC__ */ 144 145 typedef enum { res_goahead, res_nextns, res_modified, res_done, res_error } 146 res_sendhookact; 147 148 typedef res_sendhookact (*res_send_qhook)__P((struct sockaddr * const *ns, 149 const uchar_t **query, 150 int *querylen, 151 uchar_t *ans, 152 int anssiz, 153 int *resplen)); 154 155 typedef res_sendhookact (*res_send_rhook)__P((const struct sockaddr *ns, 156 const uchar_t *query, 157 int querylen, 158 uchar_t *ans, 159 int anssiz, 160 int *resplen)); 161 162 struct res_sym { 163 int number; /* Identifying number, like T_MX */ 164 const char *name; /* Its symbolic name, like "MX" */ 165 const char *humanname; /* Its fun name, like "mail exchanger" */ 166 }; 167 168 /* 169 * Global defines and variables for resolver stub. 170 */ 171 /* ADDRSORT and MAXADDR retained for compatibility; not used */ 172 #define ADDRSORT 1 /* enable the address-sorting option */ 173 #define MAXADDR 10 /* max # addresses to sort by */ 174 175 #define MAXNS 3 /* max # name servers we'll track */ 176 #define MAXDFLSRCH 3 /* # default domain levels to try */ 177 #define MAXDNSRCH 6 /* max # domains in search path */ 178 #define LOCALDOMAINPARTS 2 /* min levels in name that is "local" */ 179 180 #define RES_TIMEOUT 5 /* min. seconds between retries */ 181 #define MAXRESOLVSORT 10 /* number of net to sort on */ 182 #define RES_MAXNDOTS 15 /* should reflect bit field size */ 183 #define RES_MAXRETRANS 30 /* only for resolv.conf/RES_OPTIONS */ 184 #define RES_MAXRETRY 5 /* only for resolv.conf/RES_OPTIONS */ 185 #define RES_DFLRETRY 2 /* Default #/tries. */ 186 #define RES_MAXTIME 65535 /* Infinity, in milliseconds. */ 187 188 struct __res_state_ext; 189 190 struct __res_state { 191 int retrans; /* retransmission time interval */ 192 int retry; /* number of times to retransmit */ 193 #ifdef __sun 194 uint_t options; /* option flags - see below. */ 195 #else 196 ulong_t options; /* option flags - see below. */ 197 #endif 198 int nscount; /* number of name servers */ 199 struct sockaddr_in 200 nsaddr_list[MAXNS]; /* address of name server */ 201 #define nsaddr nsaddr_list[0] /* for backward compatibility */ 202 ushort_t id; /* current packet id */ 203 char *dnsrch[MAXDNSRCH+1]; /* components of domain to search */ 204 char defdname[256]; /* default domain (deprecated) */ 205 #ifdef __sun 206 uint_t pfcode; /* RES_PRF_ flags - see below. */ 207 #else 208 ulong_t pfcode; /* RES_PRF_ flags - see below. */ 209 #endif 210 unsigned ndots:4; /* threshold for initial abs. query */ 211 unsigned nsort:4; /* number of elements in sort_list[] */ 212 char unused[3]; 213 struct { 214 struct in_addr addr; 215 unsigned int mask; 216 } sort_list[MAXRESOLVSORT]; 217 res_send_qhook qhook; /* query hook */ 218 res_send_rhook rhook; /* response hook */ 219 int res_h_errno; /* last one set for this context */ 220 int _vcsock; /* PRIVATE: for res_send VC i/o */ 221 uint_t _flags; /* PRIVATE: see below */ 222 uint_t _pad; /* make _u 64 bit aligned */ 223 union { 224 /* On an 32-bit arch this means 512b total. */ 225 char pad[72 - 4*sizeof (int) - 2*sizeof (void *)]; 226 struct { 227 uint16_t nscount; 228 uint16_t nstimes[MAXNS]; /* ms. */ 229 int nssocks[MAXNS]; 230 struct __res_state_ext *ext; /* extention for IPv6 */ 231 } _ext; 232 } _u; 233 }; 234 235 typedef struct __res_state *res_state; 236 237 union res_sockaddr_union { 238 struct sockaddr_in sin; 239 #ifdef IN6ADDR_ANY_INIT 240 struct sockaddr_in6 sin6; 241 #endif 242 #ifdef ISC_ALIGN64 243 int64_t __align64; /* 64bit alignment */ 244 #else 245 int32_t __align32; /* 32bit alignment */ 246 #endif 247 char __space[128]; /* max size */ 248 }; 249 250 /* 251 * Resolver flags (used to be discrete per-module statics ints). 252 */ 253 #define RES_F_VC 0x00000001 /* socket is TCP */ 254 #define RES_F_CONN 0x00000002 /* socket is connected */ 255 #define RES_F_EDNS0ERR 0x00000004 /* EDNS0 caused errors */ 256 #define RES_F__UNUSED 0x00000008 /* (unused) */ 257 #define RES_F_LASTMASK 0x000000F0 /* ordinal server of last res_nsend */ 258 #define RES_F_LASTSHIFT 4 /* bit position of LASTMASK "flag" */ 259 #define RES_GETLAST(res) (((res)._flags & RES_F_LASTMASK) >> RES_F_LASTSHIFT) 260 261 /* res_findzonecut2() options */ 262 #define RES_EXHAUSTIVE 0x00000001 /* always do all queries */ 263 #define RES_IPV4ONLY 0x00000002 /* IPv4 only */ 264 #define RES_IPV6ONLY 0x00000004 /* IPv6 only */ 265 266 /* 267 * Resolver options (keep these in synch with res_debug.c, please) 268 */ 269 #define RES_INIT 0x00000001 /* address initialized */ 270 #define RES_DEBUG 0x00000002 /* print debug messages */ 271 #define RES_AAONLY 0x00000004 /* authoritative answers only (!IMPL) */ 272 #define RES_USEVC 0x00000008 /* use virtual circuit */ 273 #define RES_PRIMARY 0x00000010 /* query primary server only (!IMPL) */ 274 #define RES_IGNTC 0x00000020 /* ignore trucation errors */ 275 #define RES_RECURSE 0x00000040 /* recursion desired */ 276 #define RES_DEFNAMES 0x00000080 /* use default domain name */ 277 #define RES_STAYOPEN 0x00000100 /* Keep TCP socket open */ 278 #define RES_DNSRCH 0x00000200 /* search up local domain tree */ 279 #define RES_INSECURE1 0x00000400 /* type 1 security disabled */ 280 #define RES_INSECURE2 0x00000800 /* type 2 security disabled */ 281 #define RES_NOALIASES 0x00001000 /* shuts off HOSTALIASES feature */ 282 #define RES_USE_INET6 0x00002000 /* use/map IPv6 in gethostbyname() */ 283 #define RES_ROTATE 0x00004000 /* rotate ns list after each query */ 284 #define RES_NOCHECKNAME 0x00008000 /* do not check names for sanity. */ 285 #define RES_KEEPTSIG 0x00010000 /* do not strip TSIG records */ 286 #define RES_BLAST 0x00020000 /* blast all recursive servers */ 287 #define RES_NO_NIBBLE 0x00040000 /* disable IPv6 nibble mode reverse */ 288 #define RES_NO_BITSTRING 0x00080000 /* disable IPv6 bitstring mode revrse */ 289 #define RES_NOTLDQUERY 0x00100000 /* don't unqualified name as a tld */ 290 #define RES_USE_DNSSEC 0x00200000 /* use DNSSEC using OK bit in OPT */ 291 /* KAME extensions: use higher bit to avoid conflict with ISC use */ 292 #define RES_USE_DNAME 0x10000000 /* use DNAME */ 293 #define RES_USE_EDNS0 0x40000000 /* use EDNS0 if configured */ 294 #define RES_NO_NIBBLE2 0x80000000 /* disable alternate nibble lookup */ 295 296 #define RES_DEFAULT (RES_RECURSE | RES_DEFNAMES | RES_DNSRCH) 297 298 /* 299 * Resolver "pfcode" values. Used by dig. 300 */ 301 #define RES_PRF_STATS 0x00000001 302 #define RES_PRF_UPDATE 0x00000002 303 #define RES_PRF_CLASS 0x00000004 304 #define RES_PRF_CMD 0x00000008 305 #define RES_PRF_QUES 0x00000010 306 #define RES_PRF_ANS 0x00000020 307 #define RES_PRF_AUTH 0x00000040 308 #define RES_PRF_ADD 0x00000080 309 #define RES_PRF_HEAD1 0x00000100 310 #define RES_PRF_HEAD2 0x00000200 311 #define RES_PRF_TTLID 0x00000400 312 #define RES_PRF_HEADX 0x00000800 313 #define RES_PRF_QUERY 0x00001000 314 #define RES_PRF_REPLY 0x00002000 315 #define RES_PRF_INIT 0x00004000 316 #define RES_PRF_TRUNC 0x00008000 317 /* 0x00010000 */ 318 319 /* Things involving an internal (static) resolver context. */ 320 #ifdef _REENTRANT 321 extern struct __res_state *__res_state(void); 322 #define _res (*__res_state()) 323 #else 324 #ifndef __BIND_NOSTATIC 325 extern struct __res_state _res; 326 #endif 327 #endif 328 329 #ifndef __BIND_NOSTATIC 330 void fp_nquery __P((const uchar_t *, int, FILE *)); 331 void fp_query __P((const uchar_t *, FILE *)); 332 const char *hostalias __P((const char *)); 333 void p_query __P((const uchar_t *)); 334 void res_close __P((void)); 335 int res_init __P((void)); 336 int res_isourserver __P((const struct sockaddr_in *)); 337 int res_mkquery __P((int, const char *, int, int, const uchar_t *, 338 int, const uchar_t *, uchar_t *, int)); 339 int res_query __P((const char *, int, int, uchar_t *, int)); 340 int res_querydomain __P((const char *, const char *, int, int, 341 uchar_t *, int)); 342 int res_search __P((const char *, int, int, uchar_t *, int)); 343 int res_send __P((const uchar_t *, int, uchar_t *, int)); 344 int res_sendsigned __P((const uchar_t *, int, ns_tsig_key *, 345 uchar_t *, int)); 346 #endif /* __BIND_NOSTATIC */ 347 348 extern const struct res_sym __p_key_syms[]; 349 extern const struct res_sym __p_cert_syms[]; 350 extern const struct res_sym __p_class_syms[]; 351 extern const struct res_sym __p_type_syms[]; 352 extern const struct res_sym __p_rcode_syms[]; 353 354 int res_hnok __P((const char *)); 355 int res_ownok __P((const char *)); 356 int res_mailok __P((const char *)); 357 int res_dnok __P((const char *)); 358 int sym_ston __P((const struct res_sym *, const char *, int *)); 359 const char *sym_ntos __P((const struct res_sym *, int, int *)); 360 const char *sym_ntop __P((const struct res_sym *, int, int *)); 361 int b64_ntop __P((uchar_t const *, size_t, char *, size_t)); 362 int b64_pton __P((char const *, uchar_t *, size_t)); 363 int loc_aton __P((const char *ascii, uchar_t *binary)); 364 const char *loc_ntoa __P((const uchar_t *binary, char *ascii)); 365 int dn_skipname __P((const uchar_t *, const uchar_t *)); 366 void putlong __P((unsigned int, uchar_t *)); 367 void putshort __P((unsigned short, uchar_t *)); 368 const char *p_class __P((int)); 369 const char *p_time __P((unsigned int)); 370 const char *p_type __P((int)); 371 const char *p_rcode __P((int)); 372 const char *p_sockun __P((union res_sockaddr_union, char *, size_t)); 373 const uchar_t *p_cdnname __P((const uchar_t *, const uchar_t *, int, 374 FILE *)); 375 const uchar_t *p_cdname __P((const uchar_t *, const uchar_t *, FILE *)); 376 const uchar_t *p_fqnname __P((const uchar_t *cp, const uchar_t *msg, 377 int, char *, int)); 378 const uchar_t *p_fqname __P((const uchar_t *, const uchar_t *, FILE *)); 379 const char *p_option __P((uint_t option)); 380 char *p_secstodate __P((uint_t)); 381 int dn_count_labels __P((const char *)); 382 int dn_comp __P((const char *, uchar_t *, int, 383 uchar_t **, uchar_t **)); 384 int dn_expand __P((const uchar_t *, const uchar_t *, 385 const uchar_t *, char *, int)); 386 uint_t res_randomid __P((void)); 387 int res_nameinquery __P((const char *, int, int, 388 const uchar_t *, const uchar_t *)); 389 int res_queriesmatch __P((const uchar_t *, const uchar_t *, 390 const uchar_t *, const uchar_t *)); 391 const char *p_section __P((int section, int opcode)); 392 393 394 /* Things involving a resolver context. */ 395 int res_ninit __P((res_state)); 396 int res_nisourserver __P((const res_state, 397 const struct sockaddr_in *)); 398 void fp_resstat __P((const res_state, FILE *)); 399 void res_pquery __P((const res_state, const uchar_t *, int, FILE *)); 400 const char *res_hostalias __P((const res_state, const char *, 401 char *, size_t)); 402 int res_nquery __P((res_state, 403 const char *, int, int, uchar_t *, int)); 404 int res_nsearch __P((res_state, const char *, int, 405 int, uchar_t *, int)); 406 int res_nquerydomain __P((res_state, 407 const char *, const char *, int, int, 408 uchar_t *, int)); 409 int res_nmkquery __P((res_state, 410 int, const char *, int, int, const uchar_t *, 411 int, const uchar_t *, uchar_t *, int)); 412 int res_nsend __P((res_state, const uchar_t *, int, uchar_t *, 413 int)); 414 int res_nsendsigned __P((res_state, const uchar_t *, int, 415 ns_tsig_key *, uchar_t *, int)); 416 int res_findzonecut __P((res_state, const char *, ns_class, int, 417 char *, size_t, struct in_addr *, int)); 418 int res_findzonecut2 __P((res_state, const char *, ns_class, int, 419 char *, size_t, union res_sockaddr_union *, 420 int)); 421 void res_nclose __P((res_state)); 422 int res_nopt __P((res_state, int, uchar_t *, int, int)); 423 void res_send_setqhook __P((res_send_qhook hook)); 424 void res_send_setrhook __P((res_send_rhook hook)); 425 int __res_vinit __P((res_state, int)); 426 void res_destroyservicelist __P((void)); 427 const char *res_servicename __P((uint16_t port, const char *proto)); 428 const char *res_protocolname __P((int num)); 429 void res_destroyprotolist __P((void)); 430 void res_buildprotolist __P((void)); 431 const char *res_get_nibblesuffix __P((res_state)); 432 const char *res_get_nibblesuffix2 __P((res_state)); 433 void res_ndestroy __P((res_state)); 434 uint16_t res_nametoclass __P((const char *buf, int *success)); 435 uint16_t res_nametotype __P((const char *buf, int *success)); 436 void res_setservers __P((res_state, 437 const union res_sockaddr_union *, int)); 438 int res_getservers __P((res_state, 439 union res_sockaddr_union *, int)); 440 441 442 #ifdef __cplusplus 443 } 444 #endif 445 446 #endif /* !_RESOLV_H_ */ 447