resolv.h revision 36888
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 * $Id: resolv.h,v 1.14 1997/09/01 01:19:10 brian 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 <stdio.h> 64 65/* 66 * Revision information. This is the release date in YYYYMMDD format. 67 * It can change every day so the right thing to do with it is use it 68 * in preprocessor commands such as "#if (__RES > 19931104)". Do not 69 * compare for equality; rather, use it to determine whether your resolver 70 * is new enough to contain a certain feature. 71 */ 72 73#define __RES 19960801 74 75/* 76 * This used to be defined in res_query.c, now it's in herror.c. It was 77 * never extern'd by any *.h file before it was placed here. herror.c is 78 * part of libresolv.a even though it might make more sense in libnetdb.a 79 * or even libnet.a. 80 */ 81 82extern int h_errno; 83 84/* 85 * Resolver configuration file. 86 * Normally not present, but may contain the address of the 87 * inital name server(s) to query and the domain search list. 88 */ 89 90#ifndef _PATH_RESCONF 91#define _PATH_RESCONF "/etc/resolv.conf" 92#endif 93 94/* 95 * Global defines and variables for resolver stub. 96 */ 97#define MAXNS 3 /* max # name servers we'll track */ 98#define MAXDFLSRCH 3 /* # default domain levels to try */ 99#define MAXDNSRCH 6 /* max # domains in search path */ 100#define LOCALDOMAINPARTS 2 /* min levels in name that is "local" */ 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 106struct __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 pad[72]; /* on an i386 this means 512b total */ 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 truncation 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#define RES_NOTLDQUERY 0x00004000 /* Don't query TLD names */ 146 147#define RES_DEFAULT (RES_RECURSE | RES_DEFNAMES | RES_DNSRCH) 148 149/* 150 * Resolver "pfcode" values. Used by dig. 151 */ 152#define RES_PRF_STATS 0x00000001 153#define RES_PRF_UPDATE 0x00000002 154#define RES_PRF_CLASS 0x00000004 155#define RES_PRF_CMD 0x00000008 156#define RES_PRF_QUES 0x00000010 157#define RES_PRF_ANS 0x00000020 158#define RES_PRF_AUTH 0x00000040 159#define RES_PRF_ADD 0x00000080 160#define RES_PRF_HEAD1 0x00000100 161#define RES_PRF_HEAD2 0x00000200 162#define RES_PRF_TTLID 0x00000400 163#define RES_PRF_HEADX 0x00000800 164#define RES_PRF_QUERY 0x00001000 165#define RES_PRF_REPLY 0x00002000 166#define RES_PRF_INIT 0x00004000 167/* 0x00008000 */ 168 169typedef enum { res_goahead, res_nextns, res_modified, res_done, res_error } 170 res_sendhookact; 171 172typedef 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 179typedef 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 186struct 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 192extern struct __res_state _res; 193extern const struct res_sym __p_class_syms[]; 194extern 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 fp_resstat __fp_resstat /* XXX new divert */ 209#define p_query __p_query /* XXX new divert */ 210#define dn_skipname __dn_skipname 211#define fp_resstat __fp_resstat 212#define fp_query __fp_query 213#define fp_nquery __fp_nquery 214#define hostalias __hostalias 215#define putlong __putlong 216#define putshort __putshort 217#define p_class __p_class 218#define p_time __p_time 219#define p_type __p_type 220#define p_query __p_query 221#define p_cdnname __p_cdnname 222#define p_section __p_section /* XXX new func in 8.1 */ 223#define p_cdname __p_cdname 224#define p_fqnname __p_fqnname 225#define p_fqname __p_fqname 226/* XXX p_rr gone */ 227#define p_option __p_option 228#define p_secstodate __p_secstodate 229#define dn_count_labels __dn_count_labels 230#define dn_comp __dn_comp 231#define dn_expand __dn_expand /* XXX unmasked */ 232#define res_init __res_init /* XXX unmasked */ 233#define res_randomid __res_randomid 234#define res_query __res_query /* XXX unmasked */ 235#define res_search __res_search /* XXX unmasked */ 236#define res_querydomain __res_querydomain /* XXX unmasked */ 237#define res_mkquery __res_mkquery /* XXX unmasked */ 238#define res_send __res_send /* XXX unmasked */ 239#define res_isourserver __res_isourserver 240#define res_nameinquery __res_nameinquery 241#define res_queriesmatch __res_queriesmatch 242#define res_close __res_close 243#define res_mkupdate __res_mkupdate /* XXX new func in 8.1 */ 244#define res_mkupdrec __res_mkupdrec /* XXX new func in 8.1 */ 245#define res_freeupdrec __res_freeupdrec /* XXX new func in 8.1 */ 246 247__BEGIN_DECLS 248int res_hnok __P((const char *)); 249int res_ownok __P((const char *)); 250int res_mailok __P((const char *)); 251int res_dnok __P((const char *)); 252int sym_ston __P((const struct res_sym *, const char *, int *)); 253const char * sym_ntos __P((const struct res_sym *, int, int *)); 254const char * sym_ntop __P((const struct res_sym *, int, int *)); 255int b64_ntop __P((u_char const *, size_t, char *, size_t)); 256int b64_pton __P((char const *, u_char *, size_t)); 257int loc_aton __P((const char *, u_char *)); 258const char * loc_ntoa __P((const u_char *, char *)); 259int dn_skipname __P((const u_char *, const u_char *)); 260void fp_resstat __P((struct __res_state *, FILE *)); 261void fp_query __P((const u_char *, FILE *)); 262void fp_nquery __P((const u_char *, int, FILE *)); 263const char * hostalias __P((const char *)); 264void putlong __P((u_int32_t, u_char *)); 265void putshort __P((u_int16_t, u_char *)); 266const char * p_class __P((int)); 267const char * p_time __P((u_int32_t)); 268const char * p_type __P((int)); 269void p_query __P((const u_char *)); 270const u_char * p_cdnname __P((const u_char *, const u_char *, int, FILE *)); 271const u_char * p_cdname __P((const u_char *, const u_char *, FILE *)); 272const u_char * p_fqnname __P((const u_char *, const u_char *, 273 int, char *, int)); 274const u_char * p_fqname __P((const u_char *, const u_char *, FILE *)); 275const char * p_option __P((u_long)); 276char * p_secstodate __P((u_long)); 277int dn_count_labels __P((const char *)); 278int dn_comp __P((const char *, u_char *, int, 279 u_char **, u_char **)); 280int dn_expand __P((const u_char *, const u_char *, const u_char *, 281 char *, int)); 282int res_init __P((void)); 283u_int res_randomid __P((void)); 284int res_query __P((const char *, int, int, u_char *, int)); 285int res_search __P((const char *, int, int, u_char *, int)); 286int res_querydomain __P((const char *, const char *, int, int, 287 u_char *, int)); 288int res_mkquery __P((int, const char *, int, int, const u_char *, 289 int, const u_char *, u_char *, int)); 290int res_send __P((const u_char *, int, u_char *, int)); 291int res_isourserver __P((const struct sockaddr_in *)); 292int res_nameinquery __P((const char *, int, int, 293 const u_char *, const u_char *)); 294int res_queriesmatch __P((const u_char *, const u_char *, 295 const u_char *, const u_char *)); 296void res_close __P((void)); 297const char * p_section __P((int, int)); 298int res_update __P((ns_updrec *)); 299int res_mkupdate __P((ns_updrec *, u_char *, int)); 300ns_updrec * res_mkupdrec __P((int, const char *, u_int, u_int, u_long)); 301void res_freeupdrec __P((ns_updrec *)); 302__END_DECLS 303 304#endif /* !_RESOLV_H_ */ 305