| 1 | /*- |
| 2 | * Copyright (c) 1983, 1987, 1989, 1993 |
| 3 | * The Regents of the University of California. All rights reserved. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions |
| 7 | * are met: |
| 8 | * 1. Redistributions of source code must retain the above copyright |
| 9 | * notice, this list of conditions and the following disclaimer. |
| 10 | * 2. Redistributions in binary form must reproduce the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer in the |
| 12 | * documentation and/or other materials provided with the distribution. |
| 13 | * 3. All advertising materials mentioning features or use of this software |
| 14 | * must display the following acknowledgement: |
| 15 | * This product includes software developed by the University of |
| 16 | * California, Berkeley and its contributors. |
| 17 | * 4. 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 | |
| 34 | /* |
| 35 | * Portions Copyright (c) 1996 by Internet Software Consortium. |
| 36 | * |
| 37 | * Permission to use, copy, modify, and distribute this software for any |
| 38 | * purpose with or without fee is hereby granted, provided that the above |
| 39 | * copyright notice and this permission notice appear in all copies. |
| 40 | * |
| 41 | * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS |
| 42 | * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES |
| 43 | * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE |
| 44 | * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL |
| 45 | * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR |
| 46 | * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS |
| 47 | * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS |
| 48 | * SOFTWARE. |
| 49 | */ |
| 50 | |
| 51 | /* |
| 52 | * @(#)resolv.h 8.1 (Berkeley) 6/2/93 |
| 53 | * From Id: resolv.h,v 8.12 1998/04/28 19:36:46 halley Exp $ |
| 54 | * $FreeBSD: src/include/resolv.h,v 1.19.2.1 2001/06/15 22:08:26 ume Exp $ |
| 55 | */ |
| 56 | |
| 57 | #ifndef _RESOLV_H_ |
| 58 | #define _RESOLV_H_ |
| 59 | |
| 60 | #include <sys/param.h> |
| 61 | #include <sys/types.h> |
| 62 | #include <sys/cdefs.h> |
| 63 | #include <sys/socket.h> |
| 64 | #include <stdio.h> |
| 65 | |
| 66 | /* |
| 67 | * Revision information. This is the release date in YYYYMMDD format. |
| 68 | * It can change every day so the right thing to do with it is use it |
| 69 | * in preprocessor commands such as "#if (__RES > 19931104)". Do not |
| 70 | * compare for equality; rather, use it to determine whether your resolver |
| 71 | * is new enough to contain a certain feature. |
| 72 | */ |
| 73 | |
| 74 | #define __RES 19960801 |
| 75 | |
| 76 | /* |
| 77 | * Resolver configuration file. |
| 78 | * Normally not present, but may contain the address of the |
| 79 | * inital name server(s) to query and the domain search list. |
| 80 | */ |
| 81 | |
| 82 | #ifndef _PATH_RESCONF |
| 83 | #define _PATH_RESCONF "/etc/resolv.conf" |
| 84 | #endif |
| 85 | |
| 86 | /* |
| 87 | * Global defines and variables for resolver stub. |
| 88 | */ |
| 89 | #define MAXNS 3 /* max # name servers we'll track */ |
| 90 | #define MAXDFLSRCH 3 /* # default domain levels to try */ |
| 91 | #define MAXDNSRCH 6 /* max # domains in search path */ |
| 92 | #define LOCALDOMAINPARTS 2 /* min levels in name that is "local" */ |
| 93 | |
| 94 | #define RES_TIMEOUT 5 /* min. seconds between retries */ |
| 95 | #define MAXRESOLVSORT 10 /* number of net to sort on */ |
| 96 | #define RES_MAXNDOTS 15 /* should reflect bit field size */ |
| 97 | |
| 98 | struct __res_state { |
| 99 | int retrans; /* retransmition time interval */ |
| 100 | int retry; /* number of times to retransmit */ |
| 101 | u_long options; /* option flags - see below. */ |
| 102 | int nscount; /* number of name servers */ |
| 103 | struct sockaddr_in |
| 104 | nsaddr_list[MAXNS]; /* address of name server */ |
| 105 | #define nsaddr nsaddr_list[0] /* for backward compatibility */ |
| 106 | u_short id; /* current message id */ |
| 107 | char *dnsrch[MAXDNSRCH+1]; /* components of domain to search */ |
| 108 | char defdname[256]; /* default domain (deprecated) */ |
| 109 | u_long pfcode; /* RES_PRF_ flags - see below. */ |
| 110 | unsigned ndots:4; /* threshold for initial abs. query */ |
| 111 | unsigned nsort:4; /* number of elements in sort_list[] */ |
| 112 | char unused[3]; |
| 113 | struct { |
| 114 | struct in_addr addr; |
| 115 | u_int32_t mask; |
| 116 | } sort_list[MAXRESOLVSORT]; |
| 117 | char pad[72]; /* on an i386 this means 512b total */ |
| 118 | }; |
| 119 | |
| 120 | /* for INET6 */ |
| 121 | /* |
| 122 | * replacement of __res_state, separated to keep binary compatibility. |
| 123 | */ |
| 124 | struct __res_state_ext { |
| 125 | struct sockaddr_storage nsaddr_list[MAXNS]; |
| 126 | struct { |
| 127 | int af; /* address family for addr, mask */ |
| 128 | union { |
| 129 | struct in_addr ina; |
| 130 | struct in6_addr in6a; |
| 131 | } addr, mask; |
| 132 | } sort_list[MAXRESOLVSORT]; |
| 133 | }; |
| 134 | |
| 135 | /* |
| 136 | * Resolver options (keep these in synch with res_debug.c, please) |
| 137 | */ |
| 138 | #define RES_INIT 0x00000001 /* address initialized */ |
| 139 | #define RES_DEBUG 0x00000002 /* print debug messages */ |
| 140 | #define RES_AAONLY 0x00000004 /* authoritative answers only (!IMPL)*/ |
| 141 | #define RES_USEVC 0x00000008 /* use virtual circuit */ |
| 142 | #define RES_PRIMARY 0x00000010 /* query primary server only (!IMPL) */ |
| 143 | #define RES_IGNTC 0x00000020 /* ignore truncation errors */ |
| 144 | #define RES_RECURSE 0x00000040 /* recursion desired */ |
| 145 | #define RES_DEFNAMES 0x00000080 /* use default domain name */ |
| 146 | #define RES_STAYOPEN 0x00000100 /* Keep TCP socket open */ |
| 147 | #define RES_DNSRCH 0x00000200 /* search up local domain tree */ |
| 148 | #define RES_INSECURE1 0x00000400 /* type 1 security disabled */ |
| 149 | #define RES_INSECURE2 0x00000800 /* type 2 security disabled */ |
| 150 | #define RES_NOALIASES 0x00001000 /* shuts off HOSTALIASES feature */ |
| 151 | #define RES_USE_INET6 0x00002000 /* use/map IPv6 in gethostbyname() */ |
| 152 | #define RES_NOTLDQUERY 0x00004000 /* Don't query TLD names */ |
| 153 | /* KAME extensions: use higher bit to avoid conflict with ISC use */ |
| 154 | #define RES_USE_EDNS0 0x40000000 /* use EDNS0 */ |
| 155 | |
| 156 | #define RES_DEFAULT (RES_RECURSE | RES_DEFNAMES | RES_DNSRCH) |
| 157 | |
| 158 | /* |
| 159 | * Resolver "pfcode" values. Used by dig. |
| 160 | */ |
| 161 | #define RES_PRF_STATS 0x00000001 |
| 162 | #define RES_PRF_UPDATE 0x00000002 |
| 163 | #define RES_PRF_CLASS 0x00000004 |
| 164 | #define RES_PRF_CMD 0x00000008 |
| 165 | #define RES_PRF_QUES 0x00000010 |
| 166 | #define RES_PRF_ANS 0x00000020 |
| 167 | #define RES_PRF_AUTH 0x00000040 |
| 168 | #define RES_PRF_ADD 0x00000080 |
| 169 | #define RES_PRF_HEAD1 0x00000100 |
| 170 | #define RES_PRF_HEAD2 0x00000200 |
| 171 | #define RES_PRF_TTLID 0x00000400 |
| 172 | #define RES_PRF_HEADX 0x00000800 |
| 173 | #define RES_PRF_QUERY 0x00001000 |
| 174 | #define RES_PRF_REPLY 0x00002000 |
| 175 | #define RES_PRF_INIT 0x00004000 |
| 176 | /* 0x00008000 */ |
| 177 | |
| 178 | typedef enum { res_goahead, res_nextns, res_modified, res_done, res_error } |
| 179 | res_sendhookact; |
| 180 | |
| 181 | typedef res_sendhookact (*res_send_qhook)__P((struct sockaddr_in * const *ns, |
| 182 | const u_char **query, |
| 183 | int *querylen, |
| 184 | u_char *ans, |
| 185 | int anssiz, |
| 186 | int *resplen)); |
| 187 | |
| 188 | typedef res_sendhookact (*res_send_rhook)__P((const struct sockaddr_in *ns, |
| 189 | const u_char *query, |
| 190 | int querylen, |
| 191 | u_char *ans, |
| 192 | int anssiz, |
| 193 | int *resplen)); |
| 194 | |
| 195 | struct res_sym { |
| 196 | int number; /* Identifying number, like T_MX */ |
| 197 | char * name; /* Its symbolic name, like "MX" */ |
| 198 | char * humanname; /* Its fun name, like "mail exchanger" */ |
| 199 | }; |
| 200 | |
| 201 | extern struct __res_state _res; |
| 202 | /* for INET6 */ |
| 203 | extern struct __res_state_ext _res_ext; |
| 204 | |
| 205 | extern const struct res_sym __p_class_syms[]; |
| 206 | extern const struct res_sym __p_type_syms[]; |
| 207 | |
| 208 | /* Private routines shared between libc/net, named, nslookup and others. */ |
| 209 | #define res_hnok __res_hnok |
| 210 | #define res_ownok __res_ownok |
| 211 | #define res_mailok __res_mailok |
| 212 | #define res_dnok __res_dnok |
| 213 | #define sym_ston __sym_ston |
| 214 | #define sym_ntos __sym_ntos |
| 215 | #define sym_ntop __sym_ntop |
| 216 | #define b64_ntop __b64_ntop |
| 217 | #define b64_pton __b64_pton |
| 218 | #define loc_ntoa __loc_ntoa |
| 219 | #define loc_aton __loc_aton |
| 220 | #define fp_resstat __fp_resstat |
| 221 | #define p_query __p_query |
| 222 | #define dn_skipname __dn_skipname |
| 223 | #define fp_resstat __fp_resstat |
| 224 | #define fp_query __fp_query |
| 225 | #define fp_nquery __fp_nquery |
| 226 | #define hostalias __hostalias |
| 227 | #define putlong __putlong |
| 228 | #define putshort __putshort |
| 229 | #define p_class __p_class |
| 230 | #define p_time __p_time |
| 231 | #define p_type __p_type |
| 232 | #define p_query __p_query |
| 233 | #define p_cdnname __p_cdnname |
| 234 | #define p_section __p_section |
| 235 | #define p_cdname __p_cdname |
| 236 | #define p_fqnname __p_fqnname |
| 237 | #define p_fqname __p_fqname |
| 238 | #define p_option __p_option |
| 239 | #define p_secstodate __p_secstodate |
| 240 | #define dn_count_labels __dn_count_labels |
| 241 | #define dn_comp __dn_comp |
| 242 | #define dn_expand __dn_expand |
| 243 | #define res_init __res_init |
| 244 | #define res_randomid __res_randomid |
| 245 | #define res_query __res_query |
| 246 | #define res_search __res_search |
| 247 | #define res_querydomain __res_querydomain |
| 248 | #define res_mkquery __res_mkquery |
| 249 | #define res_send __res_send |
| 250 | #define res_isourserver __res_isourserver |
| 251 | #define res_nameinquery __res_nameinquery |
| 252 | #define res_queriesmatch __res_queriesmatch |
| 253 | #define res_close __res_close |
| 254 | #define res_opt __res_opt |
| 255 | #define res_mkupdate __res_mkupdate |
| 256 | #define res_mkupdrec __res_mkupdrec |
| 257 | #define res_freeupdrec __res_freeupdrec |
| 258 | |
| 259 | __BEGIN_DECLS |
| 260 | int res_hnok __P((const char *)); |
| 261 | int res_ownok __P((const char *)); |
| 262 | int res_mailok __P((const char *)); |
| 263 | int res_dnok __P((const char *)); |
| 264 | int sym_ston __P((const struct res_sym *, const char *, int *)); |
| 265 | const char * sym_ntos __P((const struct res_sym *, int, int *)); |
| 266 | const char * sym_ntop __P((const struct res_sym *, int, int *)); |
| 267 | int b64_ntop __P((u_char const *, size_t, char *, size_t)); |
| 268 | int b64_pton __P((char const *, u_char *, size_t)); |
| 269 | int loc_aton __P((const char *, u_char *)); |
| 270 | const char * loc_ntoa __P((const u_char *, char *)); |
| 271 | int dn_skipname __P((const u_char *, const u_char *)); |
| 272 | void fp_resstat __P((struct __res_state *, FILE *)); |
| 273 | void fp_query __P((const u_char *, FILE *)); |
| 274 | void fp_nquery __P((const u_char *, int, FILE *)); |
| 275 | const char * hostalias __P((const char *)); |
| 276 | void putlong __P((u_int32_t, u_char *)); |
| 277 | void putshort __P((u_int16_t, u_char *)); |
| 278 | const char * p_class __P((int)); |
| 279 | const char * p_time __P((u_int32_t)); |
| 280 | const char * p_type __P((int)); |
| 281 | void p_query __P((const u_char *)); |
| 282 | const u_char * p_cdnname __P((const u_char *, const u_char *, int, FILE *)); |
| 283 | const u_char * p_cdname __P((const u_char *, const u_char *, FILE *)); |
| 284 | const u_char * p_fqnname __P((const u_char *, const u_char *, |
| 285 | int, char *, int)); |
| 286 | const u_char * p_fqname __P((const u_char *, const u_char *, FILE *)); |
| 287 | const char * p_option __P((u_long)); |
| 288 | char * p_secstodate __P((u_long)); |
| 289 | int dn_count_labels __P((const char *)); |
| 290 | int dn_comp __P((const char *, u_char *, int, |
| 291 | u_char **, u_char **)); |
| 292 | int dn_expand __P((const u_char *, const u_char *, const u_char *, |
| 293 | char *, int)); |
| 294 | int res_init __P((void)); |
| 295 | u_int res_randomid __P((void)); |
| 296 | int res_query __P((const char *, int, int, u_char *, int)); |
| 297 | int res_search __P((const char *, int, int, u_char *, int)); |
| 298 | int res_querydomain __P((const char *, const char *, int, int, |
| 299 | u_char *, int)); |
| 300 | int res_mkquery __P((int, const char *, int, int, const u_char *, |
| 301 | int, const u_char *, u_char *, int)); |
| 302 | int res_send __P((const u_char *, int, u_char *, int)); |
| 303 | int res_isourserver __P((const struct sockaddr_in *)); |
| 304 | int res_nameinquery __P((const char *, int, int, |
| 305 | const u_char *, const u_char *)); |
| 306 | int res_queriesmatch __P((const u_char *, const u_char *, |
| 307 | const u_char *, const u_char *)); |
| 308 | void res_close __P((void)); |
| 309 | int res_opt __P((int, u_char *, int, int)); |
| 310 | const char * p_section __P((int, int)); |
| 311 | /* XXX The following depend on the ns_updrec typedef in arpa/nameser.h */ |
| 312 | #ifdef _ARPA_NAMESER_H_ |
| 313 | int res_update __P((ns_updrec *)); |
| 314 | int res_mkupdate __P((ns_updrec *, u_char *, int)); |
| 315 | ns_updrec * res_mkupdrec __P((int, const char *, u_int, u_int, u_long)); |
| 316 | void res_freeupdrec __P((ns_updrec *)); |
| 317 | #endif |
| 318 | __END_DECLS |
| 319 | |
| 320 | #endif /* !_RESOLV_H_ */ |