resolv.h revision 1.10
1 /* 2 * ++Copyright++ 1983, 1987, 1989, 1993 3 * - 4 * Copyright (c) 1983, 1987, 1989, 1993 5 * The Regents of the University of California. 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. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * - 35 * Portions Copyright (c) 1993 by Digital Equipment Corporation. 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, and that 40 * the name of Digital Equipment Corporation not be used in advertising or 41 * publicity pertaining to distribution of the document or software without 42 * specific, written prior permission. 43 * 44 * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL 45 * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES 46 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT 47 * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL 48 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR 49 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS 50 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS 51 * SOFTWARE. 52 * - 53 * --Copyright-- 54 */ 55 56 /* 57 * @(#)resolv.h 8.1 (Berkeley) 6/2/93 58 * $Id: resolv.h,v 1.10 1997/04/13 09:26:22 mrg Exp $ 59 */ 60 61 #ifndef _RESOLV_H_ 62 #define _RESOLV_H_ 63 64 #include <sys/param.h> 65 #if (!defined(BSD)) || (BSD < 199306) 66 # include <sys/bitypes.h> 67 #else 68 # include <sys/types.h> 69 #endif 70 #include <sys/cdefs.h> 71 #include <stdio.h> 72 73 /* 74 * Revision information. This is the release date in YYYYMMDD format. 75 * It can change every day so the right thing to do with it is use it 76 * in preprocessor commands such as "#if (__RES > 19931104)". Do not 77 * compare for equality; rather, use it to determine whether your resolver 78 * is new enough to contain a certain feature. 79 */ 80 81 #define __RES 19960801 82 83 /* 84 * Resolver configuration file. 85 * Normally not present, but may contain the address of the 86 * inital name server(s) to query and the domain search list. 87 */ 88 89 #ifndef _PATH_RESCONF 90 #define _PATH_RESCONF "/etc/resolv.conf" 91 #endif 92 93 /* 94 * Global defines and variables for resolver stub. 95 */ 96 #define MAXNS 3 /* max # name servers we'll track */ 97 #define MAXDFLSRCH 3 /* # default domain levels to try */ 98 #define MAXDNSRCH 6 /* max # domains in search path */ 99 #define LOCALDOMAINPARTS 2 /* min levels in name that is "local" */ 100 #define MAXDNSLUS 4 /* max # of host lookup types */ 101 102 #define RES_TIMEOUT 5 /* min. seconds between retries */ 103 #define MAXRESOLVSORT 10 /* number of net to sort on */ 104 #define RES_MAXNDOTS 15 /* should reflect bit field size */ 105 106 struct __res_state { 107 int retrans; /* retransmition time interval */ 108 int retry; /* number of times to retransmit */ 109 u_long options; /* option flags - see below. */ 110 int nscount; /* number of name servers */ 111 struct sockaddr_in 112 nsaddr_list[MAXNS]; /* address of name server */ 113 #define nsaddr nsaddr_list[0] /* for backward compatibility */ 114 u_short id; /* current message id */ 115 char *dnsrch[MAXDNSRCH+1]; /* components of domain to search */ 116 char defdname[256]; /* default domain (deprecated) */ 117 u_long pfcode; /* RES_PRF_ flags - see below. */ 118 unsigned ndots:4; /* threshold for initial abs. query */ 119 unsigned nsort:4; /* number of elements in sort_list[] */ 120 char unused[3]; 121 struct { 122 struct in_addr addr; 123 u_int32_t mask; 124 } sort_list[MAXRESOLVSORT]; 125 char lookups[MAXDNSLUS]; 126 }; 127 128 /* 129 * Resolver options (keep these in synch with res_debug.c, please) 130 */ 131 #define RES_INIT 0x00000001 /* address initialized */ 132 #define RES_DEBUG 0x00000002 /* print debug messages */ 133 #define RES_AAONLY 0x00000004 /* authoritative answers only (!IMPL)*/ 134 #define RES_USEVC 0x00000008 /* use virtual circuit */ 135 #define RES_PRIMARY 0x00000010 /* query primary server only (!IMPL) */ 136 #define RES_IGNTC 0x00000020 /* ignore trucation errors */ 137 #define RES_RECURSE 0x00000040 /* recursion desired */ 138 #define RES_DEFNAMES 0x00000080 /* use default domain name */ 139 #define RES_STAYOPEN 0x00000100 /* Keep TCP socket open */ 140 #define RES_DNSRCH 0x00000200 /* search up local domain tree */ 141 #define RES_INSECURE1 0x00000400 /* type 1 security disabled */ 142 #define RES_INSECURE2 0x00000800 /* type 2 security disabled */ 143 #define RES_NOALIASES 0x00001000 /* shuts off HOSTALIASES feature */ 144 #define RES_USE_INET6 0x00002000 /* use/map IPv6 in gethostbyname() */ 145 146 #define RES_DEFAULT (RES_RECURSE | RES_DEFNAMES | RES_DNSRCH) 147 148 /* 149 * Resolver "pfcode" values. Used by dig. 150 */ 151 #define RES_PRF_STATS 0x00000001 152 /* 0x00000002 */ 153 #define RES_PRF_CLASS 0x00000004 154 #define RES_PRF_CMD 0x00000008 155 #define RES_PRF_QUES 0x00000010 156 #define RES_PRF_ANS 0x00000020 157 #define RES_PRF_AUTH 0x00000040 158 #define RES_PRF_ADD 0x00000080 159 #define RES_PRF_HEAD1 0x00000100 160 #define RES_PRF_HEAD2 0x00000200 161 #define RES_PRF_TTLID 0x00000400 162 #define RES_PRF_HEADX 0x00000800 163 #define RES_PRF_QUERY 0x00001000 164 #define RES_PRF_REPLY 0x00002000 165 #define RES_PRF_INIT 0x00004000 166 /* 0x00008000 */ 167 168 /* hooks are still experimental as of 4.9.2 */ 169 typedef enum { res_goahead, res_nextns, res_modified, res_done, res_error } 170 res_sendhookact; 171 172 typedef res_sendhookact (*res_send_qhook)__P((struct sockaddr_in * const *ns, 173 const u_char **query, 174 int *querylen, 175 u_char *ans, 176 int anssiz, 177 int *resplen)); 178 179 typedef res_sendhookact (*res_send_rhook)__P((const struct sockaddr_in *ns, 180 const u_char *query, 181 int querylen, 182 u_char *ans, 183 int anssiz, 184 int *resplen)); 185 186 struct res_sym { 187 int number; /* Identifying number, like T_MX */ 188 char * name; /* Its symbolic name, like "MX" */ 189 char * humanname; /* Its fun name, like "mail exchanger" */ 190 }; 191 192 extern struct __res_state _res; 193 extern const struct res_sym __p_class_syms[]; 194 extern const struct res_sym __p_type_syms[]; 195 196 /* Private routines shared between libc/net, named, nslookup and others. */ 197 #define res_hnok __res_hnok 198 #define res_ownok __res_ownok 199 #define res_mailok __res_mailok 200 #define res_dnok __res_dnok 201 #define sym_ston __sym_ston 202 #define sym_ntos __sym_ntos 203 #define sym_ntop __sym_ntop 204 #define b64_ntop __b64_ntop 205 #define b64_pton __b64_pton 206 #define loc_ntoa __loc_ntoa 207 #define loc_aton __loc_aton 208 #define dn_skipname __dn_skipname 209 #define fp_resstat __fp_resstat 210 #define fp_query __fp_query 211 #define fp_nquery __fp_nquery 212 #define hostalias __hostalias 213 #define putlong __putlong 214 #define putshort __putshort 215 #define p_class __p_class 216 #define p_time __p_time 217 #define p_type __p_type 218 #define p_query __p_query 219 #define p_cdnname __p_cdnname 220 #define p_cdname __p_cdname 221 #define p_fqnname __p_fqnname 222 #define p_fqname __p_fqname 223 #define p_rr __p_rr 224 #define p_option __p_option 225 #define p_secstodate __p_secstodate 226 #define dn_count_labels __dn_count_labels 227 #define dn_comp __dn_comp 228 #define res_randomid __res_randomid 229 #define res_send __res_send 230 #define res_isourserver __res_isourserver 231 #define res_nameinquery __res_nameinquery 232 #define res_queriesmatch __res_queriesmatch 233 #define res_close __res_close 234 235 #ifdef BIND_RES_POSIX3 236 #define dn_expand __dn_expand 237 #define res_init __res_init 238 #define res_query __res_query 239 #define res_search __res_search 240 #define res_querydomain __res_querydomain 241 #define res_mkquery __res_mkquery 242 #endif 243 244 __BEGIN_DECLS 245 int res_hnok __P((const char *)); 246 int res_ownok __P((const char *)); 247 int res_mailok __P((const char *)); 248 int res_dnok __P((const char *)); 249 int sym_ston __P((const struct res_sym *, char *, int *)); 250 const char * sym_ntos __P((const struct res_sym *, int, int *)); 251 const char * sym_ntop __P((const struct res_sym *, int, int *)); 252 int b64_ntop __P((u_char const *, size_t, char *, size_t)); 253 int b64_pton __P((char const *, u_char *, size_t)); 254 int loc_aton __P((const char *, u_char *)); 255 const char * loc_ntoa __P((const u_char *, char *)); 256 int dn_skipname __P((const u_char *, const u_char *)); 257 void fp_resstat __P((struct __res_state *, FILE *)); 258 void fp_query __P((const u_char *, FILE *)); 259 void fp_nquery __P((const u_char *, int, FILE *)); 260 const char * hostalias __P((const char *)); 261 void putlong __P((u_int32_t, u_char *)); 262 void putshort __P((u_int16_t, u_char *)); 263 const char * p_class __P((int)); 264 const char * p_time __P((u_int32_t)); 265 const char * p_type __P((int)); 266 void p_query __P((const u_char *)); 267 const u_char * p_cdnname __P((const u_char *, const u_char *, int, FILE *)); 268 const u_char * p_cdname __P((const u_char *, const u_char *, FILE *)); 269 const u_char * p_fqnname __P((const u_char *cp, const u_char *msg, 270 int, char *, int)); 271 const u_char * p_fqname __P((const u_char *, const u_char *, FILE *)); 272 const u_char * p_rr __P((const u_char *, const u_char *, FILE *)); 273 const char * p_option __P((u_long option)); 274 char * p_secstodate __P((u_long)); 275 int dn_count_labels __P((char *)); 276 int dn_comp __P((const char *, u_char *, int, 277 u_char **, u_char **)); 278 int dn_expand __P((const u_char *, const u_char *, const u_char *, 279 char *, int)); 280 int res_init __P((void)); 281 u_int res_randomid __P((void)); 282 int res_query __P((const char *, int, int, u_char *, int)); 283 int res_search __P((const char *, int, int, u_char *, int)); 284 int res_querydomain __P((const char *, const char *, int, int, 285 u_char *, int)); 286 int res_mkquery __P((int, const char *, int, int, const u_char *, int, 287 const u_char *, u_char *, int)); 288 int res_send __P((const u_char *, int, u_char *, int)); 289 int res_isourserver __P((const struct sockaddr_in *)); 290 int res_nameinquery __P((const char *, int, int, 291 const u_char *, const u_char *)); 292 int res_queriesmatch __P((const u_char *, const u_char *, 293 const u_char *, const u_char *)); 294 void res_close __P((void)); 295 __END_DECLS 296 297 #endif /* !_RESOLV_H_ */ 298
Indexes created Mon Sep 22 05:09:51 GMT 2025