resolv.h revision 25520
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 8.17 1996/11/26 10:11:20 vixie Exp 56 * $Id: resolv.h,v 1.10 1997/02/23 09:17:15 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 <sys/socket.h> 66#include <netinet/in.h> 67#include <stdio.h> 68 69/* 70 * Revision information. This is the release date in YYYYMMDD format. 71 * It can change every day so the right thing to do with it is use it 72 * in preprocessor commands such as "#if (__RES > 19931104)". Do not 73 * compare for equality; rather, use it to determine whether your resolver 74 * is new enough to contain a certain feature. 75 */ 76 77#define __RES 19960801 78 79/* 80 * Resolver configuration file. 81 * Normally not present, but may contain the address of the 82 * inital name server(s) to query and the domain search list. 83 */ 84 85#ifndef _PATH_RESCONF 86#define _PATH_RESCONF "/etc/resolv.conf" 87#endif 88 89/* 90 * Global defines and variables for resolver stub. 91 */ 92#define MAXNS 3 /* max # name servers we'll track */ 93#define MAXDFLSRCH 3 /* # default domain levels to try */ 94#define MAXDNSRCH 6 /* max # domains in search path */ 95#define LOCALDOMAINPARTS 2 /* min levels in name that is "local" */ 96 97#define RES_TIMEOUT 5 /* min. seconds between retries */ 98#define MAXRESOLVSORT 10 /* number of net to sort on */ 99#define RES_MAXNDOTS 15 /* should reflect bit field size */ 100 101struct __res_state { 102 int retrans; /* retransmition time interval */ 103 int retry; /* number of times to retransmit */ 104 u_long options; /* option flags - see below. */ 105 int nscount; /* number of name servers */ 106 struct sockaddr_in 107 nsaddr_list[MAXNS]; /* address of name server */ 108#define nsaddr nsaddr_list[0] /* for backward compatibility */ 109 u_short id; /* current message id */ 110 char *dnsrch[MAXDNSRCH+1]; /* components of domain to search */ 111 char defdname[256]; /* default domain (deprecated) */ 112 u_long pfcode; /* RES_PRF_ flags - see below. */ 113 unsigned ndots:4; /* threshold for initial abs. query */ 114 unsigned nsort:4; /* number of elements in sort_list[] */ 115 char unused[3]; 116 struct { 117 struct in_addr addr; 118 u_int32_t mask; 119 } sort_list[MAXRESOLVSORT]; 120 char pad[72]; /* on an i386 this means 512b total */ 121}; 122 123/* 124 * Resolver options (keep these in synch with res_debug.c, please) 125 */ 126#define RES_INIT 0x00000001 /* address initialized */ 127#define RES_DEBUG 0x00000002 /* print debug messages */ 128#define RES_AAONLY 0x00000004 /* authoritative answers only (!IMPL)*/ 129#define RES_USEVC 0x00000008 /* use virtual circuit */ 130#define RES_PRIMARY 0x00000010 /* query primary server only (!IMPL) */ 131#define RES_IGNTC 0x00000020 /* ignore truncation errors */ 132#define RES_RECURSE 0x00000040 /* recursion desired */ 133#define RES_DEFNAMES 0x00000080 /* use default domain name */ 134#define RES_STAYOPEN 0x00000100 /* Keep TCP socket open */ 135#define RES_DNSRCH 0x00000200 /* search up local domain tree */ 136#define RES_INSECURE1 0x00000400 /* type 1 security disabled */ 137#define RES_INSECURE2 0x00000800 /* type 2 security disabled */ 138#define RES_NOALIASES 0x00001000 /* shuts off HOSTALIASES feature */ 139#define RES_USE_INET6 0x00002000 /* use/map IPv6 in gethostbyname() */ 140 141#define RES_DEFAULT (RES_RECURSE | RES_DEFNAMES | RES_DNSRCH) 142 143/* 144 * Resolver "pfcode" values. Used by dig. 145 */ 146#define RES_PRF_STATS 0x00000001 147/* 0x00000002 */ 148#define RES_PRF_CLASS 0x00000004 149#define RES_PRF_CMD 0x00000008 150#define RES_PRF_QUES 0x00000010 151#define RES_PRF_ANS 0x00000020 152#define RES_PRF_AUTH 0x00000040 153#define RES_PRF_ADD 0x00000080 154#define RES_PRF_HEAD1 0x00000100 155#define RES_PRF_HEAD2 0x00000200 156#define RES_PRF_TTLID 0x00000400 157#define RES_PRF_HEADX 0x00000800 158#define RES_PRF_QUERY 0x00001000 159#define RES_PRF_REPLY 0x00002000 160#define RES_PRF_INIT 0x00004000 161/* 0x00008000 */ 162 163/* hooks are still experimental as of 4.9.2 */ 164typedef enum { res_goahead, res_nextns, res_modified, res_done, res_error } 165 res_sendhookact; 166 167typedef res_sendhookact (*res_send_qhook)__P((struct sockaddr_in * const *ns, 168 const u_char **query, 169 int *querylen, 170 u_char *ans, 171 int anssiz, 172 int *resplen)); 173 174typedef res_sendhookact (*res_send_rhook)__P((const struct sockaddr_in *ns, 175 const u_char *query, 176 int querylen, 177 u_char *ans, 178 int anssiz, 179 int *resplen)); 180 181struct res_sym { 182 int number; /* Identifying number, like T_MX */ 183 char * name; /* Its symbolic name, like "MX" */ 184 char * humanname; /* Its fun name, like "mail exchanger" */ 185}; 186 187extern struct __res_state _res; 188extern const struct res_sym __p_class_syms[]; 189extern const struct res_sym __p_type_syms[]; 190 191/* Private routines shared between libc/net, named, nslookup and others. */ 192#define res_hnok __res_hnok 193#define res_ownok __res_ownok 194#define res_mailok __res_mailok 195#define res_dnok __res_dnok 196#define sym_ston __sym_ston 197#define sym_ntos __sym_ntos 198#define sym_ntop __sym_ntop 199#define b64_ntop __b64_ntop 200#define b64_pton __b64_pton 201#define loc_ntoa __loc_ntoa 202#define loc_aton __loc_aton 203#define dn_skipname __dn_skipname 204#define fp_resstat __fp_resstat 205#define fp_query __fp_query 206#define fp_nquery __fp_nquery 207#define hostalias __hostalias 208#define putlong __putlong 209#define putshort __putshort 210#define p_class __p_class 211#define p_time __p_time 212#define p_type __p_type 213#define p_query __p_query 214#define p_cdnname __p_cdnname 215#define p_cdname __p_cdname 216#define p_fqnname __p_fqnname 217#define p_fqname __p_fqname 218#define p_rr __p_rr 219#define p_option __p_option 220#define p_secstodate __p_secstodate 221#define dn_count_labels __dn_count_labels 222#define dn_comp __dn_comp 223#define res_randomid __res_randomid 224#define res_send __res_send 225#define res_isourserver __res_isourserver 226#define res_nameinquery __res_nameinquery 227#define res_queriesmatch __res_queriesmatch 228#define res_close __res_close 229 230#ifdef BIND_RES_POSIX3 231#define dn_expand __dn_expand 232#define res_init __res_init 233#define res_query __res_query 234#define res_search __res_search 235#define res_querydomain __res_querydomain 236#define res_mkquery __res_mkquery 237#endif 238 239__BEGIN_DECLS 240int res_hnok __P((const char *)); 241int res_ownok __P((const char *)); 242int res_mailok __P((const char *)); 243int res_dnok __P((const char *)); 244int sym_ston __P((const struct res_sym *, char *, int *)); 245const char * sym_ntos __P((const struct res_sym *, int, int *)); 246const char * sym_ntop __P((const struct res_sym *, int, int *)); 247int b64_ntop __P((u_char const *, size_t, char *, size_t)); 248int b64_pton __P((char const *, u_char *, size_t)); 249int loc_aton __P((const char *, u_char *)); 250const char * loc_ntoa __P((const u_char *, char *)); 251int dn_skipname __P((const u_char *, const u_char *)); 252void fp_resstat __P((struct __res_state *, FILE *)); 253void fp_query __P((const u_char *, FILE *)); 254void fp_nquery __P((const u_char *, int, FILE *)); 255const char * hostalias __P((const char *)); 256void putlong __P((u_int32_t, u_char *)); 257void putshort __P((u_int16_t, u_char *)); 258const char * p_class __P((int)); 259const char * p_time __P((u_int32_t)); 260const char * p_type __P((int)); 261void p_query __P((const u_char *)); 262const u_char * p_cdnname __P((const u_char *, const u_char *, int, FILE *)); 263const u_char * p_cdname __P((const u_char *, const u_char *, FILE *)); 264const u_char * p_fqnname __P((const u_char *, const u_char *, 265 int, char *, int)); 266const u_char * p_fqname __P((const u_char *, const u_char *, FILE *)); 267const u_char * p_rr __P((const u_char *, const u_char *, FILE *)); 268const char * p_option __P((u_long)); 269char * p_secstodate __P((u_long)); 270int dn_count_labels __P((char *)); 271int dn_comp __P((const char *, u_char *, int, 272 u_char **, u_char **)); 273int dn_expand __P((const u_char *, const u_char *, const u_char *, 274 char *, int)); 275int res_init __P((void)); 276u_int res_randomid __P((void)); 277int res_query __P((const char *, int, int, u_char *, int)); 278int res_search __P((const char *, int, int, u_char *, int)); 279int res_querydomain __P((const char *, const char *, int, int, 280 u_char *, int)); 281int res_mkquery __P((int, const char *, int, int, const u_char *, 282 int, const u_char *, u_char *, int)); 283int res_send __P((const u_char *, int, u_char *, int)); 284int res_isourserver __P((const struct sockaddr_in *)); 285int res_nameinquery __P((const char *, int, int, 286 const u_char *, const u_char *)); 287int res_queriesmatch __P((const u_char *, const u_char *, 288 const u_char *, const u_char *)); 289void res_close __P((void)); 290__END_DECLS 291 292#endif /* !_RESOLV_H_ */ 293