1 /* $NetBSD: resolv.h,v 1.22 2003/08/07 09:44:11 agc Exp $ */ 2 3 /* 4 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the project nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 /*- 33 * Copyright (c) 1983, 1987, 1989, 1993 34 * The Regents of the University of California. All rights reserved. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 3. Neither the name of the University nor the names of its contributors 45 * may be used to endorse or promote products derived from this software 46 * without specific prior written permission. 47 * 48 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 49 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 50 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 51 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 52 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 53 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 54 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 55 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 56 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 57 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 58 * SUCH DAMAGE. 59 * 60 * @(#)resolv.h 8.1 (Berkeley) 6/2/93 61 * Id: resolv.h,v 4.9.1.2 1993/05/17 09:59:01 vixie Exp 62 * - 63 * Portions Copyright (c) 1993 by Digital Equipment Corporation. 64 * 65 * Permission to use, copy, modify, and distribute this software for any 66 * purpose with or without fee is hereby granted, provided that the above 67 * copyright notice and this permission notice appear in all copies, and that 68 * the name of Digital Equipment Corporation not be used in advertising or 69 * publicity pertaining to distribution of the document or software without 70 * specific, written prior permission. 71 * 72 * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL 73 * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES 74 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT 75 * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL 76 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR 77 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS 78 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS 79 * SOFTWARE. 80 * - 81 * --Copyright-- 82 */ 83 84 #ifndef _RESOLV_H_ 85 #define _RESOLV_H_ 86 87 #include <sys/param.h> 88 #include <sys/types.h> 89 #include <sys/cdefs.h> 90 #include <sys/socket.h> 91 #include <stdio.h> 92 93 /* 94 * Revision information. This is the release date in YYYYMMDD format. 95 * It can change every day so the right thing to do with it is use it 96 * in preprocessor commands such as "#if (__RES > 19931104)". Do not 97 * compare for equality; rather, use it to determine whether your resolver 98 * is new enough to contain a certain feature. 99 */ 100 101 #define __RES 19960801 102 103 /* 104 * Resolver configuration file. 105 * Normally not present, but may contain the address of the 106 * inital name server(s) to query and the domain search list. 107 */ 108 109 #ifndef _PATH_RESCONF 110 #define _PATH_RESCONF "/etc/resolv.conf" 111 #endif 112 113 /* 114 * Global defines and variables for resolver stub. 115 */ 116 #define MAXNS 3 /* max # name servers we'll track */ 117 #define MAXDFLSRCH 3 /* # default domain levels to try */ 118 #define MAXDNSRCH 6 /* max # domains in search path */ 119 #define LOCALDOMAINPARTS 2 /* min levels in name that is "local" */ 120 121 #define RES_TIMEOUT 5 /* min. seconds between retries */ 122 #define MAXRESOLVSORT 10 /* number of net to sort on */ 123 #define RES_MAXNDOTS 15 /* should reflect bit field size */ 124 125 struct __res_state { 126 int retrans; /* retransmission time interval */ 127 int retry; /* number of times to retransmit */ 128 u_long options; /* option flags - see below. */ 129 int nscount; /* number of name servers */ 130 struct sockaddr_in 131 nsaddr_list[MAXNS]; /* address of name server */ 132 #define nsaddr nsaddr_list[0] /* for backward compatibility */ 133 u_short id; /* current message id */ 134 char *dnsrch[MAXDNSRCH+1]; /* components of domain to search */ 135 char defdname[256]; /* default domain (deprecated) */ 136 u_long pfcode; /* RES_PRF_ flags - see below. */ 137 unsigned ndots:4; /* threshold for initial abs. query */ 138 unsigned nsort:4; /* number of elements in sort_list[] */ 139 char unused[3]; 140 struct { 141 struct in_addr addr; 142 u_int32_t mask; 143 } sort_list[MAXRESOLVSORT]; 144 char lookups[4]; 145 }; 146 147 #if 1 /* INET6 */ 148 /* 149 * replacement of __res_state, separated to keep binary compatibility. 150 */ 151 struct __res_state_ext { 152 struct sockaddr_storage nsaddr_list[MAXNS]; 153 struct { 154 int af; /* address family for addr, mask */ 155 union { 156 struct in_addr ina; 157 struct in6_addr in6a; 158 } addr, mask; 159 } sort_list[MAXRESOLVSORT]; 160 }; 161 #endif 162 163 164 /* 165 * Resolver options (keep these in synch with res_debug.c, please) 166 */ 167 #define RES_INIT 0x00000001 /* address initialized */ 168 #define RES_DEBUG 0x00000002 /* print debug messages */ 169 #define RES_AAONLY 0x00000004 /* authoritative answers only (!IMPL)*/ 170 #define RES_USEVC 0x00000008 /* use virtual circuit */ 171 #define RES_PRIMARY 0x00000010 /* query primary server only (!IMPL) */ 172 #define RES_IGNTC 0x00000020 /* ignore trucation errors */ 173 #define RES_RECURSE 0x00000040 /* recursion desired */ 174 #define RES_DEFNAMES 0x00000080 /* use default domain name */ 175 #define RES_STAYOPEN 0x00000100 /* Keep TCP socket open */ 176 #define RES_DNSRCH 0x00000200 /* search up local domain tree */ 177 #define RES_INSECURE1 0x00000400 /* type 1 security disabled */ 178 #define RES_INSECURE2 0x00000800 /* type 2 security disabled */ 179 #define RES_NOALIASES 0x00001000 /* shuts off HOSTALIASES feature */ 180 #define RES_USE_INET6 0x00002000 /* use/map IPv6 in gethostbyname() */ 181 /* KAME extensions: use higher bit to avoid conflict with ISC use */ 182 #define RES_USE_EDNS0 0x40000000 /* use EDNS0 */ 183 184 #define RES_DEFAULT (RES_RECURSE | RES_DEFNAMES | RES_DNSRCH) 185 186 /* 187 * Resolver "pfcode" values. Used by dig. 188 */ 189 #define RES_PRF_STATS 0x00000001 190 /* 0x00000002 */ 191 #define RES_PRF_CLASS 0x00000004 192 #define RES_PRF_CMD 0x00000008 193 #define RES_PRF_QUES 0x00000010 194 #define RES_PRF_ANS 0x00000020 195 #define RES_PRF_AUTH 0x00000040 196 #define RES_PRF_ADD 0x00000080 197 #define RES_PRF_HEAD1 0x00000100 198 #define RES_PRF_HEAD2 0x00000200 199 #define RES_PRF_TTLID 0x00000400 200 #define RES_PRF_HEADX 0x00000800 201 #define RES_PRF_QUERY 0x00001000 202 #define RES_PRF_REPLY 0x00002000 203 #define RES_PRF_INIT 0x00004000 204 /* 0x00008000 */ 205 206 /* hooks are still experimental as of 4.9.2 */ 207 typedef enum { res_goahead, res_nextns, res_modified, res_done, res_error } 208 res_sendhookact; 209 210 typedef res_sendhookact (*res_send_qhook)__P((struct sockaddr_in * const *, 211 const u_char **, 212 int *, 213 u_char *, 214 int, 215 int *)); 216 217 typedef res_sendhookact (*res_send_rhook)__P((const struct sockaddr_in *, 218 const u_char *, 219 int, 220 u_char *, 221 int, 222 int *)); 223 224 struct res_sym { 225 int number; /* Identifying number, like T_MX */ 226 __aconst char * name; /* Its symbolic name, like "MX" */ 227 __aconst char * humanname; /* Its fun name, like "mail exchanger" */ 228 }; 229 230 extern struct __res_state _res; 231 #if 1 /* INET6 */ 232 extern struct __res_state_ext _res_ext; 233 #endif 234 extern const struct res_sym __p_class_syms[]; 235 extern const struct res_sym __p_type_syms[]; 236 237 /* Private routines shared between libc/net, named, nslookup and others. */ 238 #define res_hnok __res_hnok 239 #define res_ownok __res_ownok 240 #define res_mailok __res_mailok 241 #define res_dnok __res_dnok 242 #define sym_ston __sym_ston 243 #define sym_ntos __sym_ntos 244 #define sym_ntop __sym_ntop 245 #define b64_ntop __b64_ntop 246 #define b64_pton __b64_pton 247 #define loc_ntoa __loc_ntoa 248 #define loc_aton __loc_aton 249 #define dn_skipname __dn_skipname 250 #define fp_resstat __fp_resstat 251 #define fp_query __fp_query 252 #define fp_nquery __fp_nquery 253 #define hostalias __hostalias 254 #define putlong __putlong 255 #define putshort __putshort 256 #define p_class __p_class 257 #define p_time __p_time 258 #define p_type __p_type 259 #define p_query __p_query 260 #define p_cdnname __p_cdnname 261 #define p_cdname __p_cdname 262 #define p_fqnname __p_fqnname 263 #define p_fqname __p_fqname 264 #define p_rr __p_rr 265 #define p_option __p_option 266 #define p_secstodate __p_secstodate 267 #define dn_count_labels __dn_count_labels 268 #define dn_comp __dn_comp 269 #define res_randomid __res_randomid 270 #define res_send __res_send 271 #define res_isourserver __res_isourserver 272 #define res_nameinquery __res_nameinquery 273 #define res_queriesmatch __res_queriesmatch 274 #define res_close __res_close 275 #define res_opt __res_opt 276 277 #ifdef BIND_RES_POSIX3 278 #define dn_expand __dn_expand 279 #define res_init __res_init 280 #define res_query __res_query 281 #define res_search __res_search 282 #define res_querydomain __res_querydomain 283 #define res_mkquery __res_mkquery 284 #endif 285 286 __BEGIN_DECLS 287 int res_hnok __P((const char *)); 288 int res_ownok __P((const char *)); 289 int res_mailok __P((const char *)); 290 int res_dnok __P((const char *)); 291 int sym_ston __P((const struct res_sym *, char *, int *)); 292 const char * sym_ntos __P((const struct res_sym *, int, int *)); 293 const char * sym_ntop __P((const struct res_sym *, int, int *)); 294 int b64_ntop __P((u_char const *, size_t, char *, size_t)); 295 int b64_pton __P((char const *, u_char *, size_t)); 296 int loc_aton __P((const char *, u_char *)); 297 const char * loc_ntoa __P((const u_char *, char *)); 298 int dn_skipname __P((const u_char *, const u_char *)); 299 void fp_resstat __P((struct __res_state *, FILE *)); 300 void fp_query __P((const u_char *, FILE *)); 301 void fp_nquery __P((const u_char *, int, FILE *)); 302 const char * hostalias __P((const char *)); 303 void putlong __P((u_int32_t, u_char *)); 304 void putshort __P((u_int16_t, u_char *)); 305 const char * p_class __P((int)); 306 const char * p_time __P((u_int32_t)); 307 const char * p_type __P((int)); 308 void p_query __P((const u_char *)); 309 const u_char * p_cdnname __P((const u_char *, const u_char *, int, FILE *)); 310 const u_char * p_cdname __P((const u_char *, const u_char *, FILE *)); 311 const u_char * p_fqnname __P((const u_char *cp, const u_char *msg, 312 int, char *, int)); 313 const u_char * p_fqname __P((const u_char *, const u_char *, FILE *)); 314 const u_char * p_rr __P((const u_char *, const u_char *, FILE *)); 315 const char * p_option __P((u_long option)); 316 char * p_secstodate __P((u_long)); 317 int dn_count_labels __P((char *)); 318 int dn_comp __P((const char *, u_char *, int, 319 u_char **, u_char **)); 320 int dn_expand __P((const u_char *, const u_char *, const u_char *, 321 char *, int)); 322 int res_init __P((void)); 323 u_int res_randomid __P((void)); 324 int res_query __P((const char *, int, int, u_char *, int)); 325 int res_search __P((const char *, int, int, u_char *, int)); 326 int res_querydomain __P((const char *, const char *, int, int, 327 u_char *, int)); 328 int res_mkquery __P((int, const char *, int, int, const u_char *, int, 329 const u_char *, u_char *, int)); 330 int res_send __P((const u_char *, int, u_char *, int)); 331 int res_isourserver __P((const struct sockaddr_in *)); 332 int res_nameinquery __P((const char *, int, int, 333 const u_char *, const u_char *)); 334 int res_queriesmatch __P((const u_char *, const u_char *, 335 const u_char *, const u_char *)); 336 void res_close __P((void)); 337 int res_opt __P((int, u_char *, int, int)); 338 __END_DECLS 339 340 #endif /* !_RESOLV_H_ */ 341