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 * $FreeBSD$ 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 #define RES_MAXRETRANS 30 /* only for resolv.conf/RES_OPTIONS */ 98 #define RES_MAXRETRY 5 /* only for resolv.conf/RES_OPTIONS */ 99 100 struct __res_state { 101 int retrans; /* retransmition time interval */ 102 int retry; /* number of times to retransmit */ 103 u_long options; /* option flags - see below. */ 104 int nscount; /* number of name servers */ 105 struct sockaddr_in 106 nsaddr_list[MAXNS]; /* address of name server */ 107 #define nsaddr nsaddr_list[0] /* for backward compatibility */ 108 u_short id; /* current message id */ 109 char *dnsrch[MAXDNSRCH+1]; /* components of domain to search */ 110 char defdname[256]; /* default domain (deprecated) */ 111 u_long pfcode; /* RES_PRF_ flags - see below. */ 112 unsigned ndots:4; /* threshold for initial abs. query */ 113 unsigned nsort:4; /* number of elements in sort_list[] */ 114 char unused[3]; 115 struct { 116 struct in_addr addr; 117 u_int32_t mask; 118 } sort_list[MAXRESOLVSORT]; 119 char pad[72]; /* on an i386 this means 512b total */ 120 }; 121 122 /* for INET6 */ 123 /* 124 * replacement of __res_state, separated to keep binary compatibility. 125 */ 126 struct __res_state_ext { 127 struct sockaddr_storage nsaddr_list[MAXNS]; 128 struct { 129 int af; /* address family for addr, mask */ 130 union { 131 struct in_addr ina; 132 struct in6_addr in6a; 133 } addr, mask; 134 } sort_list[MAXRESOLVSORT]; 135 }; 136 137 /* 138 * Resolver options (keep these in synch with res_debug.c, please) 139 */ 140 #define RES_INIT 0x00000001 /* address initialized */ 141 #define RES_DEBUG 0x00000002 /* print debug messages */ 142 #define RES_AAONLY 0x00000004 /* authoritative answers only (!IMPL)*/ 143 #define RES_USEVC 0x00000008 /* use virtual circuit */ 144 #define RES_PRIMARY 0x00000010 /* query primary server only (!IMPL) */ 145 #define RES_IGNTC 0x00000020 /* ignore truncation errors */ 146 #define RES_RECURSE 0x00000040 /* recursion desired */ 147 #define RES_DEFNAMES 0x00000080 /* use default domain name */ 148 #define RES_STAYOPEN 0x00000100 /* Keep TCP socket open */ 149 #define RES_DNSRCH 0x00000200 /* search up local domain tree */ 150 #define RES_INSECURE1 0x00000400 /* type 1 security disabled */ 151 #define RES_INSECURE2 0x00000800 /* type 2 security disabled */ 152 #define RES_NOALIASES 0x00001000 /* shuts off HOSTALIASES feature */ 153 #define RES_USE_INET6 0x00002000 /* use/map IPv6 in gethostbyname() */ 154 #define RES_NOTLDQUERY 0x00004000 /* Don't query TLD names */ 155 /* KAME extensions: use higher bit to avoid conflict with ISC use */ 156 #define RES_USE_EDNS0 0x40000000 /* use EDNS0 */ 157 158 #define RES_DEFAULT (RES_RECURSE | RES_DEFNAMES | RES_DNSRCH) 159 160 /* 161 * Resolver "pfcode" values. Used by dig. 162 */ 163 #define RES_PRF_STATS 0x00000001 164 #define RES_PRF_UPDATE 0x00000002 165 #define RES_PRF_CLASS 0x00000004 166 #define RES_PRF_CMD 0x00000008 167 #define RES_PRF_QUES 0x00000010 168 #define RES_PRF_ANS 0x00000020 169 #define RES_PRF_AUTH 0x00000040 170 #define RES_PRF_ADD 0x00000080 171 #define RES_PRF_HEAD1 0x00000100 172 #define RES_PRF_HEAD2 0x00000200 173 #define RES_PRF_TTLID 0x00000400 174 #define RES_PRF_HEADX 0x00000800 175 #define RES_PRF_QUERY 0x00001000 176 #define RES_PRF_REPLY 0x00002000 177 #define RES_PRF_INIT 0x00004000 178 /* 0x00008000 */ 179 180 typedef enum { res_goahead, res_nextns, res_modified, res_done, res_error } 181 res_sendhookact; 182 183 typedef res_sendhookact (*res_send_qhook)(struct sockaddr_in * const *ns, 184 const u_char **query, 185 int *querylen, 186 u_char *ans, 187 int anssiz, 188 int *resplen); 189 190 typedef res_sendhookact (*res_send_rhook)(const struct sockaddr_in *ns, 191 const u_char *query, 192 int querylen, 193 u_char *ans, 194 int anssiz, 195 int *resplen); 196 197 struct res_sym { 198 int number; /* Identifying number, like T_MX */ 199 char * name; /* Its symbolic name, like "MX" */ 200 char * humanname; /* Its fun name, like "mail exchanger" */ 201 }; 202 203 extern struct __res_state _res; 204 /* for INET6 */ 205 extern struct __res_state_ext _res_ext; 206 207 extern const struct res_sym __p_class_syms[]; 208 extern const struct res_sym __p_type_syms[]; 209 210 /* Private routines shared between libc/net, named, nslookup and others. */ 211 #define res_hnok __res_hnok 212 #define res_ownok __res_ownok 213 #define res_mailok __res_mailok 214 #define res_dnok __res_dnok 215 #define sym_ston __sym_ston 216 #define sym_ntos __sym_ntos 217 #define sym_ntop __sym_ntop 218 #define b64_ntop __b64_ntop 219 #define b64_pton __b64_pton 220 #define loc_ntoa __loc_ntoa 221 #define loc_aton __loc_aton 222 #define fp_resstat __fp_resstat 223 #define p_query __p_query 224 #define dn_skipname __dn_skipname 225 #define fp_resstat __fp_resstat 226 #define fp_query __fp_query 227 #define fp_nquery __fp_nquery 228 #define hostalias __hostalias 229 #define putlong __putlong 230 #define putshort __putshort 231 #define p_class __p_class 232 #define p_time __p_time 233 #define p_type __p_type 234 #define p_query __p_query 235 #define p_cdnname __p_cdnname 236 #define p_section __p_section 237 #define p_cdname __p_cdname 238 #define p_fqnname __p_fqnname 239 #define p_fqname __p_fqname 240 #define p_option __p_option 241 #define p_secstodate __p_secstodate 242 #define dn_count_labels __dn_count_labels 243 #define dn_comp __dn_comp 244 #define dn_expand __dn_expand 245 #define res_init __res_init 246 #define res_randomid __res_randomid 247 #define res_query __res_query 248 #define res_search __res_search 249 #define res_querydomain __res_querydomain 250 #define res_mkquery __res_mkquery 251 #define res_send __res_send 252 #define res_isourserver __res_isourserver 253 #define res_nameinquery __res_nameinquery 254 #define res_queriesmatch __res_queriesmatch 255 #define res_close __res_close 256 #define res_opt __res_opt 257 #define res_mkupdate __res_mkupdate 258 #define res_mkupdrec __res_mkupdrec 259 #define res_freeupdrec __res_freeupdrec 260 261 __BEGIN_DECLS 262 int res_hnok(const char *); 263 int res_ownok(const char *); 264 int res_mailok(const char *); 265 int res_dnok(const char *); 266 int sym_ston(const struct res_sym *, const char *, int *); 267 const char * sym_ntos(const struct res_sym *, int, int *); 268 const char * sym_ntop(const struct res_sym *, int, int *); 269 int b64_ntop(u_char const *, size_t, char *, size_t); 270 int b64_pton(char const *, u_char *, size_t); 271 int loc_aton(const char *, u_char *); 272 const char * loc_ntoa(const u_char *, char *); 273 int dn_skipname(const u_char *, const u_char *); 274 void fp_resstat(struct __res_state *, FILE *); 275 void fp_query(const u_char *, FILE *); 276 void fp_nquery(const u_char *, int, FILE *); 277 const char * hostalias(const char *); 278 void putlong(u_int32_t, u_char *); 279 void putshort(u_int16_t, u_char *); 280 const char * p_class(int); 281 const char * p_time(u_int32_t); 282 const char * p_type(int); 283 void p_query(const u_char *); 284 const u_char * p_cdnname(const u_char *, const u_char *, int, FILE *); 285 const u_char * p_cdname(const u_char *, const u_char *, FILE *); 286 const u_char * p_fqnname(const u_char *, const u_char *, 287 int, char *, int); 288 const u_char * p_fqname(const u_char *, const u_char *, FILE *); 289 const char * p_option(u_long); 290 char * p_secstodate(u_long); 291 int dn_count_labels(const char *); 292 int dn_comp(const char *, u_char *, int, u_char **, u_char **); 293 int dn_expand(const u_char *, const u_char *, const u_char *, 294 char *, int); 295 int res_init(void); 296 u_int res_randomid(void); 297 int res_query(const char *, int, int, u_char *, int); 298 int res_search(const char *, int, int, u_char *, int); 299 int res_querydomain(const char *, const char *, int, int, 300 u_char *, int); 301 int res_mkquery(int, const char *, int, int, const u_char *, 302 int, const u_char *, u_char *, int); 303 int res_send(const u_char *, int, u_char *, int); 304 int res_isourserver(const struct sockaddr_in *); 305 int res_nameinquery(const char *, int, int, 306 const u_char *, const u_char *); 307 int res_queriesmatch(const u_char *, const u_char *, 308 const u_char *, const u_char *); 309 void res_close(void); 310 int res_opt(int, u_char *, int, int); 311 const char * p_section(int, int); 312 /* XXX These must be exported for BIND4 compatibility. */ 313 void __putlong(u_int32_t, u_char *); 314 void __putshort(u_int16_t, u_char *); 315 u_int32_t _getlong(const u_char *); 316 u_int16_t _getshort(const u_char *); 317 /* XXX The following depend on the ns_updrec typedef in arpa/nameser.h */ 318 #ifdef _ARPA_NAMESER_H_ 319 int res_update(ns_updrec *); 320 int res_mkupdate(ns_updrec *, u_char *, int); 321 ns_updrec * res_mkupdrec(int, const char *, u_int, u_int, u_long); 322 void res_freeupdrec(ns_updrec *); 323 #endif 324 __END_DECLS 325 326 #endif /* !_RESOLV_H_ */ 327