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 * Portions Copyright (c) 1993 by Digital Equipment Corporation. 35 * 36 * Permission to use, copy, modify, and distribute this software for any 37 * purpose with or without fee is hereby granted, provided that the above 38 * copyright notice and this permission notice appear in all copies, and that 39 * the name of Digital Equipment Corporation not be used in advertising or 40 * publicity pertaining to distribution of the document or software without 41 * specific, written prior permission. 42 * 43 * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL 44 * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES 45 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT 46 * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL 47 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR 48 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS 49 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS 50 * SOFTWARE. 51 * - 52 * --Copyright-- 53 * 54 * @(#)resolv.h 8.1 (Berkeley) 6/2/93 55 * From Id: resolv.h,v 8.18 1997/06/01 20:34:32 vixie Exp 56 * $Id: resolv.h,v 1.13 1997/06/27 08:32:38 peter Exp $ 57 */ 58 59 #ifndef _RESOLV_H_ 60 #define _RESOLV_H_ 61 62 #include <sys/param.h> 63 #include <sys/types.h> 64 #include <sys/cdefs.h> 65 #include <stdio.h> 66 67 /* 68 * Revision information. This is the release date in YYYYMMDD format. 69 * It can change every day so the right thing to do with it is use it 70 * in preprocessor commands such as "#if (__RES > 19931104)". Do not 71 * compare for equality; rather, use it to determine whether your resolver 72 * is new enough to contain a certain feature. 73 */ 74 75 #define __RES 19960801 76 77 /* 78 * Resolver configuration file. 79 * Normally not present, but may contain the address of the 80 * inital name server(s) to query and the domain search list. 81 */ 82 83 #ifndef _PATH_RESCONF 84 #define _PATH_RESCONF "/etc/resolv.conf" 85 #endif 86 87 /* 88 * Global defines and variables for resolver stub. 89 */ 90 #define MAXNS 3 /* max # name servers we'll track */ 91 #define MAXDFLSRCH 3 /* # default domain levels to try */ 92 #define MAXDNSRCH 6 /* max # domains in search path */ 93 #define LOCALDOMAINPARTS 2 /* min levels in name that is "local" */ 94 95 #define RES_TIMEOUT 5 /* min. seconds between retries */ 96 #define MAXRESOLVSORT 10 /* number of net to sort on */ 97 #define RES_MAXNDOTS 15 /* should reflect bit field size */ 98 99 struct __res_state { 100 int retrans; /* retransmition time interval */ 101 int retry; /* number of times to retransmit */ 102 u_long options; /* option flags - see below. */ 103 int nscount; /* number of name servers */ 104 struct sockaddr_in 105 nsaddr_list[MAXNS]; /* address of name server */ 106 #define nsaddr nsaddr_list[0] /* for backward compatibility */ 107 u_short id; /* current message id */ 108 char *dnsrch[MAXDNSRCH+1]; /* components of domain to search */ 109 char defdname[256]; /* default domain (deprecated) */ 110 u_long pfcode; /* RES_PRF_ flags - see below. */ 111 unsigned ndots:4; /* threshold for initial abs. query */ 112 unsigned nsort:4; /* number of elements in sort_list[] */ 113 char unused[3]; 114 struct { 115 struct in_addr addr; 116 u_int32_t mask; 117 } sort_list[MAXRESOLVSORT]; 118 char pad[72]; /* on an i386 this means 512b total */ 119 }; 120 121 /* 122 * Resolver options (keep these in synch with res_debug.c, please) 123 */ 124 #define RES_INIT 0x00000001 /* address initialized */ 125 #define RES_DEBUG 0x00000002 /* print debug messages */ 126 #define RES_AAONLY 0x00000004 /* authoritative answers only (!IMPL)*/ 127 #define RES_USEVC 0x00000008 /* use virtual circuit */ 128 #define RES_PRIMARY 0x00000010 /* query primary server only (!IMPL) */ 129 #define RES_IGNTC 0x00000020 /* ignore truncation errors */ 130 #define RES_RECURSE 0x00000040 /* recursion desired */ 131 #define RES_DEFNAMES 0x00000080 /* use default domain name */ 132 #define RES_STAYOPEN 0x00000100 /* Keep TCP socket open */ 133 #define RES_DNSRCH 0x00000200 /* search up local domain tree */ 134 #define RES_INSECURE1 0x00000400 /* type 1 security disabled */ 135 #define RES_INSECURE2 0x00000800 /* type 2 security disabled */ 136 #define RES_NOALIASES 0x00001000 /* shuts off HOSTALIASES feature */ 137 #define RES_USE_INET6 0x00002000 /* use/map IPv6 in gethostbyname() */ 138 #define RES_NOTLDQUERY 0x00004000 /* Don't query TLD names */ 139 140 #define RES_DEFAULT (RES_RECURSE | RES_DEFNAMES | RES_DNSRCH) 141 142 /* 143 * Resolver "pfcode" values. Used by dig. 144 */ 145 #define RES_PRF_STATS 0x00000001 146 /* 0x00000002 */ 147 #define RES_PRF_CLASS 0x00000004 148 #define RES_PRF_CMD 0x00000008 149 #define RES_PRF_QUES 0x00000010 150 #define RES_PRF_ANS 0x00000020 151 #define RES_PRF_AUTH 0x00000040 152 #define RES_PRF_ADD 0x00000080 153 #define RES_PRF_HEAD1 0x00000100 154 #define RES_PRF_HEAD2 0x00000200 155 #define RES_PRF_TTLID 0x00000400 156 #define RES_PRF_HEADX 0x00000800 157 #define RES_PRF_QUERY 0x00001000 158 #define RES_PRF_REPLY 0x00002000 159 #define RES_PRF_INIT 0x00004000 160 /* 0x00008000 */ 161 162 /* hooks are still experimental as of 4.9.2 */ 163 typedef enum { res_goahead, res_nextns, res_modified, res_done, res_error } 164 res_sendhookact; 165 166 typedef res_sendhookact (*res_send_qhook)__P((struct sockaddr_in * const *ns, 167 const u_char **query, 168 int *querylen, 169 u_char *ans, 170 int anssiz, 171 int *resplen)); 172 173 typedef res_sendhookact (*res_send_rhook)__P((const struct sockaddr_in *ns, 174 const u_char *query, 175 int querylen, 176 u_char *ans, 177 int anssiz, 178 int *resplen)); 179 180 struct res_sym { 181 int number; /* Identifying number, like T_MX */ 182 char * name; /* Its symbolic name, like "MX" */ 183 char * humanname; /* Its fun name, like "mail exchanger" */ 184 }; 185 186 extern struct __res_state _res; 187 extern const struct res_sym __p_class_syms[]; 188 extern const struct res_sym __p_type_syms[]; 189 190 /* Private routines shared between libc/net, named, nslookup and others. */ 191 #define res_hnok __res_hnok 192 #define res_ownok __res_ownok 193 #define res_mailok __res_mailok 194 #define res_dnok __res_dnok 195 #define sym_ston __sym_ston 196 #define sym_ntos __sym_ntos 197 #define sym_ntop __sym_ntop 198 #define b64_ntop __b64_ntop 199 #define b64_pton __b64_pton 200 #define loc_ntoa __loc_ntoa 201 #define loc_aton __loc_aton 202 #define dn_skipname __dn_skipname 203 #define fp_resstat __fp_resstat 204 #define fp_query __fp_query 205 #define fp_nquery __fp_nquery 206 #define hostalias __hostalias 207 #define putlong __putlong 208 #define putshort __putshort 209 #define p_class __p_class 210 #define p_time __p_time 211 #define p_type __p_type 212 #define p_query __p_query 213 #define p_cdnname __p_cdnname 214 #define p_cdname __p_cdname 215 #define p_fqnname __p_fqnname 216 #define p_fqname __p_fqname 217 #define p_rr __p_rr 218 #define p_option __p_option 219 #define p_secstodate __p_secstodate 220 #define dn_count_labels __dn_count_labels 221 #define dn_comp __dn_comp 222 #define res_randomid __res_randomid 223 #define res_isourserver __res_isourserver 224 #define res_nameinquery __res_nameinquery 225 #define res_queriesmatch __res_queriesmatch 226 #define res_close __res_close 227 228 #ifdef BIND_RES_POSIX3 229 #define dn_expand __dn_expand 230 #define res_init __res_init 231 #define res_query __res_query 232 #define res_search __res_search 233 #define res_querydomain __res_querydomain 234 #define res_mkquery __res_mkquery 235 #define res_send __res_send 236 #endif 237 238 __BEGIN_DECLS 239 int res_hnok __P((const char *)); 240 int res_ownok __P((const char *)); 241 int res_mailok __P((const char *)); 242 int res_dnok __P((const char *)); 243 int sym_ston __P((const struct res_sym *, char *, int *)); 244 const char * sym_ntos __P((const struct res_sym *, int, int *)); 245 const char * sym_ntop __P((const struct res_sym *, int, int *)); 246 int b64_ntop __P((u_char const *, size_t, char *, size_t)); 247 int b64_pton __P((char const *, u_char *, size_t)); 248 int loc_aton __P((const char *, u_char *)); 249 const char * loc_ntoa __P((const u_char *, char *)); 250 int dn_skipname __P((const u_char *, const u_char *)); 251 void fp_resstat __P((struct __res_state *, FILE *)); 252 void fp_query __P((const u_char *, FILE *)); 253 void fp_nquery __P((const u_char *, int, FILE *)); 254 const char * hostalias __P((const char *)); 255 void putlong __P((u_int32_t, u_char *)); 256 void putshort __P((u_int16_t, u_char *)); 257 const char * p_class __P((int)); 258 const char * p_time __P((u_int32_t)); 259 const char * p_type __P((int)); 260 void p_query __P((const u_char *)); 261 const u_char * p_cdnname __P((const u_char *, const u_char *, int, FILE *)); 262 const u_char * p_cdname __P((const u_char *, const u_char *, FILE *)); 263 const u_char * p_fqnname __P((const u_char *, const u_char *, 264 int, char *, int)); 265 const u_char * p_fqname __P((const u_char *, const u_char *, FILE *)); 266 const u_char * p_rr __P((const u_char *, const u_char *, FILE *)); 267 const char * p_option __P((u_long)); 268 char * p_secstodate __P((u_long)); 269 int dn_count_labels __P((char *)); 270 int dn_comp __P((const char *, u_char *, int, 271 u_char **, u_char **)); 272 int dn_expand __P((const u_char *, const u_char *, const u_char *, 273 char *, int)); 274 int res_init __P((void)); 275 u_int res_randomid __P((void)); 276 int res_query __P((const char *, int, int, u_char *, int)); 277 int res_search __P((const char *, int, int, u_char *, int)); 278 int res_querydomain __P((const char *, const char *, int, int, 279 u_char *, int)); 280 int res_mkquery __P((int, const char *, int, int, const u_char *, 281 int, const u_char *, u_char *, int)); 282 int res_send __P((const u_char *, int, u_char *, int)); 283 int res_isourserver __P((const struct sockaddr_in *)); 284 int res_nameinquery __P((const char *, int, int, 285 const u_char *, const u_char *)); 286 int res_queriesmatch __P((const u_char *, const u_char *, 287 const u_char *, const u_char *)); 288 void res_close __P((void)); 289 __END_DECLS 290 291 #endif /* !_RESOLV_H_ */ 292