1 /* $NetBSD: resolv.h,v 1.19 2000/08/09 14:40:52 itojun 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. All advertising materials mentioning features or use of this software 45 * must display the following acknowledgement: 46 * This product includes software developed by the University of 47 * California, Berkeley and its contributors. 48 * 4. Neither the name of the University nor the names of its contributors 49 * may be used to endorse or promote products derived from this software 50 * without specific prior written permission. 51 * 52 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 53 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 54 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 55 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 56 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 57 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 58 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 59 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 60 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 61 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 62 * SUCH DAMAGE. 63 * 64 * @(#)resolv.h 8.1 (Berkeley) 6/2/93 65 * Id: resolv.h,v 4.9.1.2 1993/05/17 09:59:01 vixie Exp 66 * - 67 * Portions Copyright (c) 1993 by Digital Equipment Corporation. 68 * 69 * Permission to use, copy, modify, and distribute this software for any 70 * purpose with or without fee is hereby granted, provided that the above 71 * copyright notice and this permission notice appear in all copies, and that 72 * the name of Digital Equipment Corporation not be used in advertising or 73 * publicity pertaining to distribution of the document or software without 74 * specific, written prior permission. 75 * 76 * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL 77 * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES 78 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT 79 * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL 80 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR 81 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS 82 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS 83 * SOFTWARE. 84 * - 85 * --Copyright-- 86 */ 87 88 #ifndef _RESOLV_H_ 89 #define _RESOLV_H_ 90 91 #include <sys/param.h> 92 #include <sys/types.h> 93 #include <sys/cdefs.h> 94 #include <sys/socket.h> 95 #include <stdio.h> 96 97 /* 98 * Revision information. This is the release date in YYYYMMDD format. 99 * It can change every day so the right thing to do with it is use it 100 * in preprocessor commands such as "#if (__RES > 19931104)". Do not 101 * compare for equality; rather, use it to determine whether your resolver 102 * is new enough to contain a certain feature. 103 */ 104 105 #define __RES 19960801 106 107 /* 108 * Resolver configuration file. 109 * Normally not present, but may contain the address of the 110 * inital name server(s) to query and the domain search list. 111 */ 112 113 #ifndef _PATH_RESCONF 114 #define _PATH_RESCONF "/etc/resolv.conf" 115 #endif 116 117 /* 118 * Global defines and variables for resolver stub. 119 */ 120 #define MAXNS 3 /* max # name servers we'll track */ 121 #define MAXDFLSRCH 3 /* # default domain levels to try */ 122 #define MAXDNSRCH 6 /* max # domains in search path */ 123 #define LOCALDOMAINPARTS 2 /* min levels in name that is "local" */ 124 125 #define RES_TIMEOUT 5 /* min. seconds between retries */ 126 #define MAXRESOLVSORT 10 /* number of net to sort on */ 127 #define RES_MAXNDOTS 15 /* should reflect bit field size */ 128 129 struct __res_state { 130 int retrans; /* retransmition time interval */ 131 int retry; /* number of times to retransmit */ 132 u_long options; /* option flags - see below. */ 133 int nscount; /* number of name servers */ 134 struct sockaddr_in 135 nsaddr_list[MAXNS]; /* address of name server */ 136 #define nsaddr nsaddr_list[0] /* for backward compatibility */ 137 u_short id; /* current message id */ 138 char *dnsrch[MAXDNSRCH+1]; /* components of domain to search */ 139 char defdname[256]; /* default domain (deprecated) */ 140 u_long pfcode; /* RES_PRF_ flags - see below. */ 141 unsigned ndots:4; /* threshold for initial abs. query */ 142 unsigned nsort:4; /* number of elements in sort_list[] */ 143 char unused[3]; 144 struct { 145 struct in_addr addr; 146 u_int32_t mask; 147 } sort_list[MAXRESOLVSORT]; 148 char lookups[4]; 149 }; 150 151 #if 1 /* INET6 */ 152 /* 153 * replacement of __res_state, separated to keep binary compatibility. 154 */ 155 struct __res_state_ext { 156 struct sockaddr_storage nsaddr_list[MAXNS]; 157 struct { 158 int af; /* address family for addr, mask */ 159 union { 160 struct in_addr ina; 161 struct in6_addr in6a; 162 } addr, mask; 163 } sort_list[MAXRESOLVSORT]; 164 }; 165 #endif 166 167 168 /* 169 * Resolver options (keep these in synch with res_debug.c, please) 170 */ 171 #define RES_INIT 0x00000001 /* address initialized */ 172 #define RES_DEBUG 0x00000002 /* print debug messages */ 173 #define RES_AAONLY 0x00000004 /* authoritative answers only (!IMPL)*/ 174 #define RES_USEVC 0x00000008 /* use virtual circuit */ 175 #define RES_PRIMARY 0x00000010 /* query primary server only (!IMPL) */ 176 #define RES_IGNTC 0x00000020 /* ignore trucation errors */ 177 #define RES_RECURSE 0x00000040 /* recursion desired */ 178 #define RES_DEFNAMES 0x00000080 /* use default domain name */ 179 #define RES_STAYOPEN 0x00000100 /* Keep TCP socket open */ 180 #define RES_DNSRCH 0x00000200 /* search up local domain tree */ 181 #define RES_INSECURE1 0x00000400 /* type 1 security disabled */ 182 #define RES_INSECURE2 0x00000800 /* type 2 security disabled */ 183 #define RES_NOALIASES 0x00001000 /* shuts off HOSTALIASES feature */ 184 #define RES_USE_INET6 0x00002000 /* use/map IPv6 in gethostbyname() */ 185 /* KAME extensions: use higher bit to avoid conflict with ISC use */ 186 #define RES_USE_EDNS0 0x40000000 /* use EDNS0 */ 187 188 #define RES_DEFAULT (RES_RECURSE | RES_DEFNAMES | RES_DNSRCH) 189 190 /* 191 * Resolver "pfcode" values. Used by dig. 192 */ 193 #define RES_PRF_STATS 0x00000001 194 /* 0x00000002 */ 195 #define RES_PRF_CLASS 0x00000004 196 #define RES_PRF_CMD 0x00000008 197 #define RES_PRF_QUES 0x00000010 198 #define RES_PRF_ANS 0x00000020 199 #define RES_PRF_AUTH 0x00000040 200 #define RES_PRF_ADD 0x00000080 201 #define RES_PRF_HEAD1 0x00000100 202 #define RES_PRF_HEAD2 0x00000200 203 #define RES_PRF_TTLID 0x00000400 204 #define RES_PRF_HEADX 0x00000800 205 #define RES_PRF_QUERY 0x00001000 206 #define RES_PRF_REPLY 0x00002000 207 #define RES_PRF_INIT 0x00004000 208 /* 0x00008000 */ 209 210 /* hooks are still experimental as of 4.9.2 */ 211 typedef enum { res_goahead, res_nextns, res_modified, res_done, res_error } 212 res_sendhookact; 213 214 typedef res_sendhookact (*res_send_qhook)__P((struct sockaddr_in * const *ns, 215 const u_char **query, 216 int *querylen, 217 u_char *ans, 218 int anssiz, 219 int *resplen)); 220 221 typedef res_sendhookact (*res_send_rhook)__P((const struct sockaddr_in *ns, 222 const u_char *query, 223 int querylen, 224 u_char *ans, 225 int anssiz, 226 int *resplen)); 227 228 struct res_sym { 229 int number; /* Identifying number, like T_MX */ 230 __aconst char * name; /* Its symbolic name, like "MX" */ 231 __aconst char * humanname; /* Its fun name, like "mail exchanger" */ 232 }; 233 234 extern struct __res_state _res; 235 #if 1 /* INET6 */ 236 extern struct __res_state_ext _res_ext; 237 #endif 238 extern const struct res_sym __p_class_syms[]; 239 extern const struct res_sym __p_type_syms[]; 240 241 /* Private routines shared between libc/net, named, nslookup and others. */ 242 #define res_hnok __res_hnok 243 #define res_ownok __res_ownok 244 #define res_mailok __res_mailok 245 #define res_dnok __res_dnok 246 #define sym_ston __sym_ston 247 #define sym_ntos __sym_ntos 248 #define sym_ntop __sym_ntop 249 #define b64_ntop __b64_ntop 250 #define b64_pton __b64_pton 251 #define loc_ntoa __loc_ntoa 252 #define loc_aton __loc_aton 253 #define dn_skipname __dn_skipname 254 #define fp_resstat __fp_resstat 255 #define fp_query __fp_query 256 #define fp_nquery __fp_nquery 257 #define hostalias __hostalias 258 #define putlong __putlong 259 #define putshort __putshort 260 #define p_class __p_class 261 #define p_time __p_time 262 #define p_type __p_type 263 #define p_query __p_query 264 #define p_cdnname __p_cdnname 265 #define p_cdname __p_cdname 266 #define p_fqnname __p_fqnname 267 #define p_fqname __p_fqname 268 #define p_rr __p_rr 269 #define p_option __p_option 270 #define p_secstodate __p_secstodate 271 #define dn_count_labels __dn_count_labels 272 #define dn_comp __dn_comp 273 #define res_randomid __res_randomid 274 #define res_send __res_send 275 #define res_isourserver __res_isourserver 276 #define res_nameinquery __res_nameinquery 277 #define res_queriesmatch __res_queriesmatch 278 #define res_close __res_close 279 #define res_opt __res_opt 280 281 #ifdef BIND_RES_POSIX3 282 #define dn_expand __dn_expand 283 #define res_init __res_init 284 #define res_query __res_query 285 #define res_search __res_search 286 #define res_querydomain __res_querydomain 287 #define res_mkquery __res_mkquery 288 #endif 289 290 __BEGIN_DECLS 291 int res_hnok __P((const char *)); 292 int res_ownok __P((const char *)); 293 int res_mailok __P((const char *)); 294 int res_dnok __P((const char *)); 295 int sym_ston __P((const struct res_sym *, char *, int *)); 296 const char * sym_ntos __P((const struct res_sym *, int, int *)); 297 const char * sym_ntop __P((const struct res_sym *, int, int *)); 298 int b64_ntop __P((u_char const *, size_t, char *, size_t)); 299 int b64_pton __P((char const *, u_char *, size_t)); 300 int loc_aton __P((const char *, u_char *)); 301 const char * loc_ntoa __P((const u_char *, char *)); 302 int dn_skipname __P((const u_char *, const u_char *)); 303 void fp_resstat __P((struct __res_state *, FILE *)); 304 void fp_query __P((const u_char *, FILE *)); 305 void fp_nquery __P((const u_char *, int, FILE *)); 306 const char * hostalias __P((const char *)); 307 void putlong __P((u_int32_t, u_char *)); 308 void putshort __P((u_int16_t, u_char *)); 309 const char * p_class __P((int)); 310 const char * p_time __P((u_int32_t)); 311 const char * p_type __P((int)); 312 void p_query __P((const u_char *)); 313 const u_char * p_cdnname __P((const u_char *, const u_char *, int, FILE *)); 314 const u_char * p_cdname __P((const u_char *, const u_char *, FILE *)); 315 const u_char * p_fqnname __P((const u_char *cp, const u_char *msg, 316 int, char *, int)); 317 const u_char * p_fqname __P((const u_char *, const u_char *, FILE *)); 318 const u_char * p_rr __P((const u_char *, const u_char *, FILE *)); 319 const char * p_option __P((u_long option)); 320 char * p_secstodate __P((u_long)); 321 int dn_count_labels __P((char *)); 322 int dn_comp __P((const char *, u_char *, int, 323 u_char **, u_char **)); 324 int dn_expand __P((const u_char *, const u_char *, const u_char *, 325 char *, int)); 326 int res_init __P((void)); 327 u_int res_randomid __P((void)); 328 int res_query __P((const char *, int, int, u_char *, int)); 329 int res_search __P((const char *, int, int, u_char *, int)); 330 int res_querydomain __P((const char *, const char *, int, int, 331 u_char *, int)); 332 int res_mkquery __P((int, const char *, int, int, const u_char *, int, 333 const u_char *, u_char *, int)); 334 int res_send __P((const u_char *, int, u_char *, int)); 335 int res_isourserver __P((const struct sockaddr_in *)); 336 int res_nameinquery __P((const char *, int, int, 337 const u_char *, const u_char *)); 338 int res_queriesmatch __P((const u_char *, const u_char *, 339 const u_char *, const u_char *)); 340 void res_close __P((void)); 341 int res_opt __P((int, u_char *, int, int)); 342 __END_DECLS 343 344 #endif /* !_RESOLV_H_ */ 345