1 /* 2 * Copyright 2014 Garrett D'Amore <garrett@damore.org> 3 * 4 * Copyright 2009 Sun Microsystems, Inc. All rights reserved. 5 * Use is subject to license terms. 6 * 7 * Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T 8 * All Rights Reserved 9 * 10 * Portions of this source code were derived from Berkeley 11 * 4.3 BSD under license from the regents of the University of 12 * California. 13 */ 14 15 /* 16 * BIND 4.9.4: 17 */ 18 19 /* 20 * Portions Copyright (c) 1993 by Digital Equipment Corporation. 21 * 22 * Permission to use, copy, modify, and distribute this software for any 23 * purpose with or without fee is hereby granted, provided that the above 24 * copyright notice and this permission notice appear in all copies, and that 25 * the name of Digital Equipment Corporation not be used in advertising or 26 * publicity pertaining to distribution of the document or software without 27 * specific, written prior permission. 28 * 29 * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL 30 * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES 31 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT 32 * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL 33 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR 34 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS 35 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS 36 * SOFTWARE. 37 * --Copyright-- 38 * 39 * End BIND 4.9.4 40 */ 41 42 /* 43 * Copyright (c) 1983, 1987, 1989 44 * The Regents of the University of California. All rights reserved. 45 * 46 * Redistribution and use in source and binary forms, with or without 47 * modification, are permitted provided that the following conditions 48 * are met: 49 * 1. Redistributions of source code must retain the above copyright 50 * notice, this list of conditions and the following disclaimer. 51 * 2. Redistributions in binary form must reproduce the above copyright 52 * notice, this list of conditions and the following disclaimer in the 53 * documentation and/or other materials provided with the distribution. 54 * 3. All advertising materials mentioning features or use of this software 55 * must display the following acknowledgement: 56 * This product includes software developed by the University of 57 * California, Berkeley and its contributors. 58 * 4. Neither the name of the University nor the names of its contributors 59 * may be used to endorse or promote products derived from this software 60 * without specific prior written permission. 61 * 62 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 63 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 64 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 65 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 66 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 67 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 68 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 69 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 70 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 71 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 72 * SUCH DAMAGE. 73 */ 74 75 /* 76 * Portions Copyright (c) 1996-1999 by Internet Software Consortium. 77 * 78 * Permission to use, copy, modify, and distribute this software for any 79 * purpose with or without fee is hereby granted, provided that the above 80 * copyright notice and this permission notice appear in all copies. 81 * 82 * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS 83 * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES 84 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE 85 * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL 86 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR 87 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS 88 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS 89 * SOFTWARE. 90 */ 91 92 /* 93 * @(#)resolv.h 8.1 (Berkeley) 6/2/93 94 * $Id: resolv.h,v 8.52 2003/04/29 02:27:03 marka Exp $ 95 */ 96 97 #ifndef _RESOLV_H_ 98 #define _RESOLV_H_ 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 20090302 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 #ifndef __P 136 #define __P(x) x 137 #endif 138 139 typedef enum { res_goahead, res_nextns, res_modified, res_done, res_error } 140 res_sendhookact; 141 142 typedef res_sendhookact (*res_send_qhook)__P((struct sockaddr * const *ns, 143 const uchar_t **query, 144 int *querylen, 145 uchar_t *ans, 146 int anssiz, 147 int *resplen)); 148 149 typedef res_sendhookact (*res_send_rhook)__P((const struct sockaddr *ns, 150 const uchar_t *query, 151 int querylen, 152 uchar_t *ans, 153 int anssiz, 154 int *resplen)); 155 156 struct res_sym { 157 int number; /* Identifying number, like T_MX */ 158 const char *name; /* Its symbolic name, like "MX" */ 159 const char *humanname; /* Its fun name, like "mail exchanger" */ 160 }; 161 162 /* 163 * Global defines and variables for resolver stub. 164 */ 165 /* ADDRSORT and MAXADDR retained for compatibility; not used */ 166 #define ADDRSORT 1 /* enable the address-sorting option */ 167 #define MAXADDR 10 /* max # addresses to sort by */ 168 169 #define MAXNS 3 /* max # name servers we'll track */ 170 #define MAXDFLSRCH 3 /* # default domain levels to try */ 171 #define MAXDNSRCH 6 /* max # domains in search path */ 172 #define LOCALDOMAINPARTS 2 /* min levels in name that is "local" */ 173 174 #define RES_TIMEOUT 5 /* min. seconds between retries */ 175 #define MAXRESOLVSORT 10 /* number of net to sort on */ 176 #define RES_MAXNDOTS 15 /* should reflect bit field size */ 177 #define RES_MAXRETRANS 30 /* only for resolv.conf/RES_OPTIONS */ 178 #define RES_MAXRETRY 5 /* only for resolv.conf/RES_OPTIONS */ 179 #define RES_DFLRETRY 2 /* Default #/tries. */ 180 #define RES_MAXTIME 65535 /* Infinity, in milliseconds. */ 181 182 struct __res_state_ext; 183 184 struct __res_state { 185 int retrans; /* retransmission time interval */ 186 int retry; /* number of times to retransmit */ 187 #ifdef __sun 188 uint_t options; /* option flags - see below. */ 189 #else 190 ulong_t options; /* option flags - see below. */ 191 #endif 192 int nscount; /* number of name servers */ 193 struct sockaddr_in 194 nsaddr_list[MAXNS]; /* address of name server */ 195 #define nsaddr nsaddr_list[0] /* for backward compatibility */ 196 ushort_t id; /* current packet id */ 197 char *dnsrch[MAXDNSRCH+1]; /* components of domain to search */ 198 char defdname[256]; /* default domain (deprecated) */ 199 #ifdef __sun 200 uint_t pfcode; /* RES_PRF_ flags - see below. */ 201 #else 202 ulong_t pfcode; /* RES_PRF_ flags - see below. */ 203 #endif 204 unsigned ndots:4; /* threshold for initial abs. query */ 205 unsigned nsort:4; /* number of elements in sort_list[] */ 206 char unused[3]; 207 struct { 208 struct in_addr addr; 209 unsigned int mask; 210 } sort_list[MAXRESOLVSORT]; 211 res_send_qhook qhook; /* query hook */ 212 res_send_rhook rhook; /* response hook */ 213 int res_h_errno; /* last one set for this context */ 214 int _vcsock; /* PRIVATE: for res_send VC i/o */ 215 uint_t _flags; /* PRIVATE: see below */ 216 uint_t _pad; /* make _u 64 bit aligned */ 217 union { 218 /* On an 32-bit arch this means 512b total. */ 219 char pad[72 - 4*sizeof (int) - 2*sizeof (void *)]; 220 struct { 221 uint16_t nscount; 222 uint16_t nstimes[MAXNS]; /* ms. */ 223 int nssocks[MAXNS]; 224 struct __res_state_ext *ext; /* extention for IPv6 */ 225 uchar_t _rnd[16]; /* PRIVATE: random state */ 226 } _ext; 227 } _u; 228 }; 229 230 typedef struct __res_state *res_state; 231 232 union res_sockaddr_union { 233 struct sockaddr_in sin; 234 #ifdef IN6ADDR_ANY_INIT 235 struct sockaddr_in6 sin6; 236 #endif 237 #ifdef ISC_ALIGN64 238 int64_t __align64; /* 64bit alignment */ 239 #else 240 int32_t __align32; /* 32bit alignment */ 241 #endif 242 char __space[128]; /* max size */ 243 }; 244 245 /* 246 * Resolver flags (used to be discrete per-module statics ints). 247 */ 248 #define RES_F_VC 0x00000001 /* socket is TCP */ 249 #define RES_F_CONN 0x00000002 /* socket is connected */ 250 #define RES_F_EDNS0ERR 0x00000004 /* EDNS0 caused errors */ 251 #define RES_F__UNUSED 0x00000008 /* (unused) */ 252 #define RES_F_LASTMASK 0x000000F0 /* ordinal server of last res_nsend */ 253 #define RES_F_LASTSHIFT 4 /* bit position of LASTMASK "flag" */ 254 #define RES_GETLAST(res) (((res)._flags & RES_F_LASTMASK) >> RES_F_LASTSHIFT) 255 256 /* res_findzonecut2() options */ 257 #define RES_EXHAUSTIVE 0x00000001 /* always do all queries */ 258 #define RES_IPV4ONLY 0x00000002 /* IPv4 only */ 259 #define RES_IPV6ONLY 0x00000004 /* IPv6 only */ 260 261 /* 262 * Resolver options (keep these in synch with res_debug.c, please) 263 */ 264 #define RES_INIT 0x00000001 /* address initialized */ 265 #define RES_DEBUG 0x00000002 /* print debug messages */ 266 #define RES_AAONLY 0x00000004 /* authoritative answers only (!IMPL) */ 267 #define RES_USEVC 0x00000008 /* use virtual circuit */ 268 #define RES_PRIMARY 0x00000010 /* query primary server only (!IMPL) */ 269 #define RES_IGNTC 0x00000020 /* ignore trucation errors */ 270 #define RES_RECURSE 0x00000040 /* recursion desired */ 271 #define RES_DEFNAMES 0x00000080 /* use default domain name */ 272 #define RES_STAYOPEN 0x00000100 /* Keep TCP socket open */ 273 #define RES_DNSRCH 0x00000200 /* search up local domain tree */ 274 #define RES_INSECURE1 0x00000400 /* type 1 security disabled */ 275 #define RES_INSECURE2 0x00000800 /* type 2 security disabled */ 276 #define RES_NOALIASES 0x00001000 /* shuts off HOSTALIASES feature */ 277 #define RES_USE_INET6 0x00002000 /* use/map IPv6 in gethostbyname() */ 278 #define RES_ROTATE 0x00004000 /* rotate ns list after each query */ 279 #define RES_NOCHECKNAME 0x00008000 /* do not check names for sanity. */ 280 #define RES_KEEPTSIG 0x00010000 /* do not strip TSIG records */ 281 #define RES_BLAST 0x00020000 /* blast all recursive servers */ 282 #define RES_NO_NIBBLE 0x00040000 /* disable IPv6 nibble mode reverse */ 283 #define RES_NO_BITSTRING 0x00080000 /* disable IPv6 bitstring mode revrse */ 284 #define RES_NOTLDQUERY 0x00100000 /* don't unqualified name as a tld */ 285 #define RES_USE_DNSSEC 0x00200000 /* use DNSSEC using OK bit in OPT */ 286 /* KAME extensions: use higher bit to avoid conflict with ISC use */ 287 #define RES_USE_DNAME 0x10000000 /* use DNAME */ 288 #define RES_USE_EDNS0 0x40000000 /* use EDNS0 if configured */ 289 #define RES_NO_NIBBLE2 0x80000000 /* disable alternate nibble lookup */ 290 291 #define RES_DEFAULT (RES_RECURSE | RES_DEFNAMES | RES_DNSRCH) 292 293 /* 294 * Resolver "pfcode" values. Used by dig. 295 */ 296 #define RES_PRF_STATS 0x00000001 297 #define RES_PRF_UPDATE 0x00000002 298 #define RES_PRF_CLASS 0x00000004 299 #define RES_PRF_CMD 0x00000008 300 #define RES_PRF_QUES 0x00000010 301 #define RES_PRF_ANS 0x00000020 302 #define RES_PRF_AUTH 0x00000040 303 #define RES_PRF_ADD 0x00000080 304 #define RES_PRF_HEAD1 0x00000100 305 #define RES_PRF_HEAD2 0x00000200 306 #define RES_PRF_TTLID 0x00000400 307 #define RES_PRF_HEADX 0x00000800 308 #define RES_PRF_QUERY 0x00001000 309 #define RES_PRF_REPLY 0x00002000 310 #define RES_PRF_INIT 0x00004000 311 #define RES_PRF_TRUNC 0x00008000 312 /* 0x00010000 */ 313 314 /* Things involving an internal (static) resolver context. */ 315 #ifdef _REENTRANT 316 extern struct __res_state *__res_state(void); 317 #define _res (*__res_state()) 318 #else 319 #ifndef __BIND_NOSTATIC 320 extern struct __res_state _res; 321 #endif 322 #endif 323 324 #ifndef __BIND_NOSTATIC 325 void fp_nquery __P((const uchar_t *, int, FILE *)); 326 void fp_query __P((const uchar_t *, FILE *)); 327 const char *hostalias __P((const char *)); 328 void p_query __P((const uchar_t *)); 329 void res_close __P((void)); 330 int res_init __P((void)); 331 int res_isourserver __P((const struct sockaddr_in *)); 332 int res_mkquery __P((int, const char *, int, int, const uchar_t *, 333 int, const uchar_t *, uchar_t *, int)); 334 int res_query __P((const char *, int, int, uchar_t *, int)); 335 int res_querydomain __P((const char *, const char *, int, int, 336 uchar_t *, int)); 337 int res_search __P((const char *, int, int, uchar_t *, int)); 338 int res_send __P((const uchar_t *, int, uchar_t *, int)); 339 int res_sendsigned __P((const uchar_t *, int, ns_tsig_key *, 340 uchar_t *, int)); 341 #endif /* __BIND_NOSTATIC */ 342 343 extern const struct res_sym __p_key_syms[]; 344 extern const struct res_sym __p_cert_syms[]; 345 extern const struct res_sym __p_class_syms[]; 346 extern const struct res_sym __p_type_syms[]; 347 extern const struct res_sym __p_rcode_syms[]; 348 349 int res_hnok __P((const char *)); 350 int res_ownok __P((const char *)); 351 int res_mailok __P((const char *)); 352 int res_dnok __P((const char *)); 353 int sym_ston __P((const struct res_sym *, const char *, int *)); 354 const char *sym_ntos __P((const struct res_sym *, int, int *)); 355 const char *sym_ntop __P((const struct res_sym *, int, int *)); 356 int b64_ntop __P((uchar_t const *, size_t, char *, size_t)); 357 int b64_pton __P((char const *, uchar_t *, size_t)); 358 int loc_aton __P((const char *ascii, uchar_t *binary)); 359 const char *loc_ntoa __P((const uchar_t *binary, char *ascii)); 360 int dn_skipname __P((const uchar_t *, const uchar_t *)); 361 void putlong __P((unsigned int, uchar_t *)); 362 void putshort __P((unsigned short, uchar_t *)); 363 const char *p_class __P((int)); 364 const char *p_time __P((unsigned int)); 365 const char *p_type __P((int)); 366 const char *p_rcode __P((int)); 367 const char *p_sockun __P((union res_sockaddr_union, char *, size_t)); 368 const uchar_t *p_cdnname __P((const uchar_t *, const uchar_t *, int, 369 FILE *)); 370 const uchar_t *p_cdname __P((const uchar_t *, const uchar_t *, FILE *)); 371 const uchar_t *p_fqnname __P((const uchar_t *cp, const uchar_t *msg, 372 int, char *, int)); 373 const uchar_t *p_fqname __P((const uchar_t *, const uchar_t *, FILE *)); 374 const char *p_option __P((uint_t option)); 375 char *p_secstodate __P((uint_t)); 376 int dn_count_labels __P((const char *)); 377 int dn_comp __P((const char *, uchar_t *, int, 378 uchar_t **, uchar_t **)); 379 int dn_expand __P((const uchar_t *, const uchar_t *, 380 const uchar_t *, char *, int)); 381 void res_rndinit __P((res_state)); 382 uint_t res_randomid __P((void)); 383 uint_t res_nrandomid __P((res_state)); 384 int res_nameinquery __P((const char *, int, int, 385 const uchar_t *, const uchar_t *)); 386 int res_queriesmatch __P((const uchar_t *, const uchar_t *, 387 const uchar_t *, const uchar_t *)); 388 const char *p_section __P((int section, int opcode)); 389 390 391 /* Things involving a resolver context. */ 392 int res_ninit __P((res_state)); 393 int res_nisourserver __P((const res_state, 394 const struct sockaddr_in *)); 395 void fp_resstat __P((const res_state, FILE *)); 396 void res_pquery __P((const res_state, const uchar_t *, int, FILE *)); 397 const char *res_hostalias __P((const res_state, const char *, 398 char *, size_t)); 399 int res_nquery __P((res_state, 400 const char *, int, int, uchar_t *, int)); 401 int res_nsearch __P((res_state, const char *, int, 402 int, uchar_t *, int)); 403 int res_nquerydomain __P((res_state, 404 const char *, const char *, int, int, 405 uchar_t *, int)); 406 int res_nmkquery __P((res_state, 407 int, const char *, int, int, const uchar_t *, 408 int, const uchar_t *, uchar_t *, int)); 409 int res_nsend __P((res_state, const uchar_t *, int, uchar_t *, 410 int)); 411 int res_nsendsigned __P((res_state, const uchar_t *, int, 412 ns_tsig_key *, uchar_t *, int)); 413 int res_findzonecut __P((res_state, const char *, ns_class, int, 414 char *, size_t, struct in_addr *, int)); 415 int res_findzonecut2 __P((res_state, const char *, ns_class, int, 416 char *, size_t, union res_sockaddr_union *, 417 int)); 418 void res_nclose __P((res_state)); 419 int res_nopt __P((res_state, int, uchar_t *, int, int)); 420 int res_nopt_rdata __P((res_state, int, uchar_t *, int, uchar_t *, 421 ushort_t, ushort_t, uchar_t *)); 422 void res_send_setqhook __P((res_send_qhook hook)); 423 void res_send_setrhook __P((res_send_rhook hook)); 424 int __res_vinit __P((res_state, int)); 425 void res_destroyservicelist __P((void)); 426 const char *res_servicename __P((uint16_t port, const char *proto)); 427 const char *res_protocolname __P((int num)); 428 void res_destroyprotolist __P((void)); 429 void res_buildprotolist __P((void)); 430 const char *res_get_nibblesuffix __P((res_state)); 431 const char *res_get_nibblesuffix2 __P((res_state)); 432 void res_ndestroy __P((res_state)); 433 uint16_t res_nametoclass __P((const char *buf, int *success)); 434 uint16_t res_nametotype __P((const char *buf, int *success)); 435 void res_setservers __P((res_state, 436 const union res_sockaddr_union *, int)); 437 int res_getservers __P((res_state, 438 union res_sockaddr_union *, int)); 439 440 441 #ifdef __cplusplus 442 } 443 #endif 444 445 #endif /* !_RESOLV_H_ */ 446