1 /* $NetBSD: resolv.h,v 1.8 1994/10/26 00:56:16 cgd Exp $ */ 2 3 /* 4 * Copyright (c) 1983, 1987, 1989 The Regents of the University of California. 5 * 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 5.15 (Berkeley) 4/3/91 36 */ 37 38 #ifndef _RESOLV_H_ 39 #define _RESOLV_H_ 40 41 /* 42 * revision information. this is the release date in YYYYMMDD format. 43 * it can change every day so the right thing to do with it is use it 44 * in preprocessor commands such as "#if (__RES > 19931104)". do not 45 * compare for equality; rather, use it to determine whether your resolver 46 * is new enough to contain a certain feature. 47 */ 48 49 #define __RES 19931104 50 51 /* 52 * Resolver configuration file. 53 * Normally not present, but may contain the address of the 54 * inital name server(s) to query and the domain search list. 55 */ 56 57 #ifndef _PATH_RESCONF 58 #define _PATH_RESCONF "/etc/resolv.conf" 59 #endif 60 61 /* 62 * Global defines and variables for resolver stub. 63 */ 64 #define MAXNS 3 /* max # name servers we'll track */ 65 #define MAXDFLSRCH 3 /* # default domain levels to try */ 66 #define MAXDNSRCH 6 /* max # domains in search path */ 67 #define LOCALDOMAINPARTS 2 /* min levels in name that is "local" */ 68 #define MAXDNSLUS 4 /* max # of host lookup types */ 69 70 #define RES_TIMEOUT 5 /* min. seconds between retries */ 71 #define MAXRESOLVSORT 10 /* number of net to sort on */ 72 #define RES_MAXNDOTS 15 /* should reflect bit field size */ 73 74 struct __res_state { 75 int retrans; /* retransmition time interval */ 76 int retry; /* number of times to retransmit */ 77 long options; /* option flags - see below. */ 78 int nscount; /* number of name servers */ 79 struct sockaddr_in nsaddr_list[MAXNS]; /* address of name server */ 80 #define nsaddr nsaddr_list[0] /* for backward compatibility */ 81 u_short id; /* current packet id */ 82 char *dnsrch[MAXDNSRCH+1]; /* components of domain to search */ 83 char defdname[MAXDNAME]; /* default domain */ 84 long pfcode; /* RES_PRF_ flags - see below. */ 85 u_char ndots:4; /* threshold for initial abs. query */ 86 u_char nsort:4; /* number of elements in sort_list[] */ 87 char unused[3]; 88 struct { 89 struct in_addr addr; 90 u_int32_t mask; 91 } sort_list[MAXRESOLVSORT]; 92 char lookups[MAXDNSLUS]; 93 }; 94 95 /* 96 * Resolver options 97 */ 98 #define RES_INIT 0x0001 /* address initialized */ 99 #define RES_DEBUG 0x0002 /* print debug messages */ 100 #define RES_AAONLY 0x0004 /* authoritative answers only */ 101 #define RES_USEVC 0x0008 /* use virtual circuit */ 102 #define RES_PRIMARY 0x0010 /* query primary server only */ 103 #define RES_IGNTC 0x0020 /* ignore trucation errors */ 104 #define RES_RECURSE 0x0040 /* recursion desired */ 105 #define RES_DEFNAMES 0x0080 /* use default domain name */ 106 #define RES_STAYOPEN 0x0100 /* Keep TCP socket open */ 107 #define RES_DNSRCH 0x0200 /* search up local domain tree */ 108 109 #define RES_DEFAULT (RES_RECURSE | RES_DEFNAMES | RES_DNSRCH) 110 111 /* 112 * Resolver "pfcode" values. Used by dig. 113 */ 114 #define RES_PRF_STATS 0x0001 115 /* 0x0002 */ 116 #define RES_PRF_CLASS 0x0004 117 #define RES_PRF_CMD 0x0008 118 #define RES_PRF_QUES 0x0010 119 #define RES_PRF_ANS 0x0020 120 #define RES_PRF_AUTH 0x0040 121 #define RES_PRF_ADD 0x0080 122 #define RES_PRF_HEAD1 0x0100 123 #define RES_PRF_HEAD2 0x0200 124 #define RES_PRF_TTLID 0x0400 125 #define RES_PRF_HEADX 0x0800 126 #define RES_PRF_QUERY 0x1000 127 #define RES_PRF_REPLY 0x2000 128 #define RES_PRF_INIT 0x4000 129 /* 0x8000 */ 130 131 extern struct __res_state _res; 132 133 #include <sys/cdefs.h> 134 #include <stdio.h> 135 136 /* Private routines shared between libc/net, named, nslookup and others. */ 137 #define dn_skipname __dn_skipname 138 #define fp_query __fp_query 139 #define hostalias __hostalias 140 #define putlong __putlong 141 #define putshort __putshort 142 #define p_class __p_class 143 #define p_time __p_time 144 #define p_type __p_type 145 __BEGIN_DECLS 146 int __dn_skipname __P((const u_char *, const u_char *)); 147 void __fp_query __P((char *, FILE *)); 148 char *__hostalias __P((const char *)); 149 void __putlong __P((u_int32_t, u_char *)); 150 void __putshort __P((u_int16_t, u_char *)); 151 char *__p_class __P((int)); 152 char *__p_time __P((u_int32_t)); 153 char *__p_type __P((int)); 154 155 int dn_comp __P((const u_char *, u_char *, int, u_char **, u_char **)); 156 int dn_expand __P((const u_char *, const u_char *, const u_char *, 157 u_char *, int)); 158 int res_init __P((void)); 159 int res_query __P((char *, int, int, u_char *, int)); 160 int res_search __P((const char *, int, int, u_char *, int)); 161 int res_mkquery __P((int, const char *, int, int, const char *, int, 162 const char *, char *, int)); 163 int res_send __P((const char *, int, char *, int)); 164 __END_DECLS 165 166 #endif /* !_RESOLV_H_ */ 167