resolv.h revision 1.17
1/* $NetBSD: resolv.h,v 1.17 1999/01/17 05:08:10 lukem Exp $ */ 2 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 * @(#)resolv.h 8.1 (Berkeley) 6/2/93 36 * Id: resolv.h,v 4.9.1.2 1993/05/17 09:59:01 vixie Exp 37 * - 38 * Portions Copyright (c) 1993 by Digital Equipment Corporation. 39 * 40 * Permission to use, copy, modify, and distribute this software for any 41 * purpose with or without fee is hereby granted, provided that the above 42 * copyright notice and this permission notice appear in all copies, and that 43 * the name of Digital Equipment Corporation not be used in advertising or 44 * publicity pertaining to distribution of the document or software without 45 * specific, written prior permission. 46 * 47 * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL 48 * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES 49 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT 50 * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL 51 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR 52 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS 53 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS 54 * SOFTWARE. 55 * - 56 * --Copyright-- 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 99struct __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 lookups[4]; 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 trucation 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() */ 138 139#define RES_DEFAULT (RES_RECURSE | RES_DEFNAMES | RES_DNSRCH) 140 141/* 142 * Resolver "pfcode" values. Used by dig. 143 */ 144#define RES_PRF_STATS 0x00000001 145/* 0x00000002 */ 146#define RES_PRF_CLASS 0x00000004 147#define RES_PRF_CMD 0x00000008 148#define RES_PRF_QUES 0x00000010 149#define RES_PRF_ANS 0x00000020 150#define RES_PRF_AUTH 0x00000040 151#define RES_PRF_ADD 0x00000080 152#define RES_PRF_HEAD1 0x00000100 153#define RES_PRF_HEAD2 0x00000200 154#define RES_PRF_TTLID 0x00000400 155#define RES_PRF_HEADX 0x00000800 156#define RES_PRF_QUERY 0x00001000 157#define RES_PRF_REPLY 0x00002000 158#define RES_PRF_INIT 0x00004000 159/* 0x00008000 */ 160 161/* hooks are still experimental as of 4.9.2 */ 162typedef enum { res_goahead, res_nextns, res_modified, res_done, res_error } 163 res_sendhookact; 164 165typedef res_sendhookact (*res_send_qhook)__P((struct sockaddr_in * const *ns, 166 const u_char **query, 167 int *querylen, 168 u_char *ans, 169 int anssiz, 170 int *resplen)); 171 172typedef res_sendhookact (*res_send_rhook)__P((const struct sockaddr_in *ns, 173 const u_char *query, 174 int querylen, 175 u_char *ans, 176 int anssiz, 177 int *resplen)); 178 179struct res_sym { 180 int number; /* Identifying number, like T_MX */ 181 __aconst char * name; /* Its symbolic name, like "MX" */ 182 __aconst char * humanname; /* Its fun name, like "mail exchanger" */ 183}; 184 185extern struct __res_state _res; 186extern const struct res_sym __p_class_syms[]; 187extern const struct res_sym __p_type_syms[]; 188 189/* Private routines shared between libc/net, named, nslookup and others. */ 190#define res_hnok __res_hnok 191#define res_ownok __res_ownok 192#define res_mailok __res_mailok 193#define res_dnok __res_dnok 194#define sym_ston __sym_ston 195#define sym_ntos __sym_ntos 196#define sym_ntop __sym_ntop 197#define b64_ntop __b64_ntop 198#define b64_pton __b64_pton 199#define loc_ntoa __loc_ntoa 200#define loc_aton __loc_aton 201#define dn_skipname __dn_skipname 202#define fp_resstat __fp_resstat 203#define fp_query __fp_query 204#define fp_nquery __fp_nquery 205#define hostalias __hostalias 206#define putlong __putlong 207#define putshort __putshort 208#define p_class __p_class 209#define p_time __p_time 210#define p_type __p_type 211#define p_query __p_query 212#define p_cdnname __p_cdnname 213#define p_cdname __p_cdname 214#define p_fqnname __p_fqnname 215#define p_fqname __p_fqname 216#define p_rr __p_rr 217#define p_option __p_option 218#define p_secstodate __p_secstodate 219#define dn_count_labels __dn_count_labels 220#define dn_comp __dn_comp 221#define res_randomid __res_randomid 222#define res_send __res_send 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#endif 236 237__BEGIN_DECLS 238int res_hnok __P((const char *)); 239int res_ownok __P((const char *)); 240int res_mailok __P((const char *)); 241int res_dnok __P((const char *)); 242int sym_ston __P((const struct res_sym *, char *, int *)); 243const char * sym_ntos __P((const struct res_sym *, int, int *)); 244const char * sym_ntop __P((const struct res_sym *, int, int *)); 245int b64_ntop __P((u_char const *, size_t, char *, size_t)); 246int b64_pton __P((char const *, u_char *, size_t)); 247int loc_aton __P((const char *, u_char *)); 248const char * loc_ntoa __P((const u_char *, char *)); 249int dn_skipname __P((const u_char *, const u_char *)); 250void fp_resstat __P((struct __res_state *, FILE *)); 251void fp_query __P((const u_char *, FILE *)); 252void fp_nquery __P((const u_char *, int, FILE *)); 253const char * hostalias __P((const char *)); 254void putlong __P((u_int32_t, u_char *)); 255void putshort __P((u_int16_t, u_char *)); 256const char * p_class __P((int)); 257const char * p_time __P((u_int32_t)); 258const char * p_type __P((int)); 259void p_query __P((const u_char *)); 260const u_char * p_cdnname __P((const u_char *, const u_char *, int, FILE *)); 261const u_char * p_cdname __P((const u_char *, const u_char *, FILE *)); 262const u_char * p_fqnname __P((const u_char *cp, const u_char *msg, 263 int, char *, int)); 264const u_char * p_fqname __P((const u_char *, const u_char *, FILE *)); 265const u_char * p_rr __P((const u_char *, const u_char *, FILE *)); 266const char * p_option __P((u_long option)); 267char * p_secstodate __P((u_long)); 268int dn_count_labels __P((char *)); 269int dn_comp __P((const char *, u_char *, int, 270 u_char **, u_char **)); 271int dn_expand __P((const u_char *, const u_char *, const u_char *, 272 char *, int)); 273int res_init __P((void)); 274u_int res_randomid __P((void)); 275int res_query __P((const char *, int, int, u_char *, int)); 276int res_search __P((const char *, int, int, u_char *, int)); 277int res_querydomain __P((const char *, const char *, int, int, 278 u_char *, int)); 279int res_mkquery __P((int, const char *, int, int, const u_char *, int, 280 const u_char *, u_char *, int)); 281int res_send __P((const u_char *, int, u_char *, int)); 282int res_isourserver __P((const struct sockaddr_in *)); 283int res_nameinquery __P((const char *, int, int, 284 const u_char *, const u_char *)); 285int res_queriesmatch __P((const u_char *, const u_char *, 286 const u_char *, const u_char *)); 287void res_close __P((void)); 288__END_DECLS 289 290#endif /* !_RESOLV_H_ */ 291