resolv.h revision 13771
1250003Sadrian/*- 2250003Sadrian * Copyright (c) 1983, 1987, 1989, 1993 3250003Sadrian * The Regents of the University of California. All rights reserved. 4250003Sadrian * 5250003Sadrian * Redistribution and use in source and binary forms, with or without 6250003Sadrian * modification, are permitted provided that the following conditions 7250003Sadrian * are met: 8250003Sadrian * 1. Redistributions of source code must retain the above copyright 9250003Sadrian * notice, this list of conditions and the following disclaimer. 10250003Sadrian * 2. Redistributions in binary form must reproduce the above copyright 11250003Sadrian * notice, this list of conditions and the following disclaimer in the 12250003Sadrian * documentation and/or other materials provided with the distribution. 13250003Sadrian * 3. All advertising materials mentioning features or use of this software 14250003Sadrian * must display the following acknowledgement: 15250003Sadrian * This product includes software developed by the University of 16250003Sadrian * California, Berkeley and its contributors. 17250003Sadrian * 4. Neither the name of the University nor the names of its contributors 18250003Sadrian * may be used to endorse or promote products derived from this software 19250003Sadrian * without specific prior written permission. 20250003Sadrian * 21250003Sadrian * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22250003Sadrian * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23250003Sadrian * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24250003Sadrian * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25250003Sadrian * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26250003Sadrian * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27250003Sadrian * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28250003Sadrian * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29250003Sadrian * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30250003Sadrian * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31250003Sadrian * SUCH DAMAGE. 32250003Sadrian * 33250003Sadrian * - 34250003Sadrian * Portions Copyright (c) 1993 by Digital Equipment Corporation. 35250003Sadrian * 36250003Sadrian * Permission to use, copy, modify, and distribute this software for any 37250003Sadrian * purpose with or without fee is hereby granted, provided that the above 38250003Sadrian * copyright notice and this permission notice appear in all copies, and that 39250003Sadrian * the name of Digital Equipment Corporation not be used in advertising or 40250003Sadrian * publicity pertaining to distribution of the document or software without 41250003Sadrian * specific, written prior permission. 42250003Sadrian * 43250003Sadrian * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL 44250003Sadrian * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES 45250003Sadrian * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT 46250003Sadrian * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL 47250003Sadrian * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR 48250003Sadrian * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS 49250003Sadrian * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS 50250003Sadrian * SOFTWARE. 51250003Sadrian * - 52250003Sadrian * --Copyright-- 53250003Sadrian * 54250003Sadrian * @(#)resolv.h 8.1 (Berkeley) 6/2/93 55250003Sadrian * From Id: resolv.h,v 4.9.1.2 1993/05/17 09:59:01 vixie Exp 56250003Sadrian * $Id: resolv.h,v 1.5 1996/01/07 05:01:50 peter Exp $ 57250003Sadrian */ 58250003Sadrian 59250003Sadrian#ifndef _RESOLV_H_ 60250003Sadrian#define _RESOLV_H_ 61250003Sadrian 62250003Sadrian#include <sys/param.h> 63250003Sadrian#include <sys/types.h> 64250003Sadrian#include <sys/cdefs.h> 65250003Sadrian#include <stdio.h> 66250003Sadrian 67250003Sadrian/* 68250003Sadrian * revision information. this is the release date in YYYYMMDD format. 69250003Sadrian * it can change every day so the right thing to do with it is use it 70250003Sadrian * in preprocessor commands such as "#if (__RES > 19931104)". do not 71250003Sadrian * compare for equality; rather, use it to determine whether your resolver 72250003Sadrian * is new enough to contain a certain feature. 73250003Sadrian */ 74250003Sadrian 75250003Sadrian#define __RES 19951031 76250003Sadrian 77250003Sadrian/* 78250003Sadrian * Resolver configuration file. 79250003Sadrian * Normally not present, but may contain the address of the 80250003Sadrian * inital name server(s) to query and the domain search list. 81250003Sadrian */ 82250003Sadrian 83250003Sadrian#ifndef _PATH_RESCONF 84250003Sadrian#define _PATH_RESCONF "/etc/resolv.conf" 85250003Sadrian#endif 86250003Sadrian 87250003Sadrian/* 88250003Sadrian * Global defines and variables for resolver stub. 89250003Sadrian */ 90250003Sadrian#define MAXNS 3 /* max # name servers we'll track */ 91250003Sadrian#define MAXDFLSRCH 3 /* # default domain levels to try */ 92250003Sadrian#define MAXDNSRCH 6 /* max # domains in search path */ 93250003Sadrian#define LOCALDOMAINPARTS 2 /* min levels in name that is "local" */ 94250003Sadrian 95250003Sadrian#define RES_TIMEOUT 5 /* min. seconds between retries */ 96250003Sadrian#define MAXRESOLVSORT 10 /* number of net to sort on */ 97250003Sadrian#define RES_MAXNDOTS 15 /* should reflect bit field size */ 98250003Sadrian 99250003Sadrianstruct __res_state { 100250003Sadrian int retrans; /* retransmition time interval */ 101250003Sadrian int retry; /* number of times to retransmit */ 102250003Sadrian u_long options; /* option flags - see below. */ 103250003Sadrian int nscount; /* number of name servers */ 104250003Sadrian struct sockaddr_in 105250003Sadrian nsaddr_list[MAXNS]; /* address of name server */ 106250003Sadrian#define nsaddr nsaddr_list[0] /* for backward compatibility */ 107250003Sadrian u_short id; /* current packet id */ 108250003Sadrian char *dnsrch[MAXDNSRCH+1]; /* components of domain to search */ 109250003Sadrian char defdname[MAXDNAME]; /* default domain */ 110250003Sadrian u_long pfcode; /* RES_PRF_ flags - see below. */ 111250003Sadrian unsigned ndots:4; /* threshold for initial abs. query */ 112250003Sadrian unsigned nsort:4; /* number of elements in sort_list[] */ 113250003Sadrian char unused[3]; 114250003Sadrian struct { 115250003Sadrian struct in_addr addr; 116250003Sadrian u_int32_t mask; 117250003Sadrian } sort_list[MAXRESOLVSORT]; 118250003Sadrian char pad[72]; /* On an i386 this means 512b total. */ 119250003Sadrian}; 120250003Sadrian 121250003Sadrian/* 122250003Sadrian * Resolver options (keep these in synch with res_debug.c, please) 123250003Sadrian */ 124250003Sadrian#define RES_INIT 0x00000001 /* address initialized */ 125250003Sadrian#define RES_DEBUG 0x00000002 /* print debug messages */ 126250003Sadrian#define RES_AAONLY 0x00000004 /* authoritative answers only (!IMPL)*/ 127250003Sadrian#define RES_USEVC 0x00000008 /* use virtual circuit */ 128250003Sadrian#define RES_PRIMARY 0x00000010 /* query primary server only (!IMPL) */ 129250003Sadrian#define RES_IGNTC 0x00000020 /* ignore truncation errors */ 130250003Sadrian#define RES_RECURSE 0x00000040 /* recursion desired */ 131250003Sadrian#define RES_DEFNAMES 0x00000080 /* use default domain name */ 132250003Sadrian#define RES_STAYOPEN 0x00000100 /* Keep TCP socket open */ 133250003Sadrian#define RES_DNSRCH 0x00000200 /* search up local domain tree */ 134250003Sadrian#define RES_INSECURE1 0x00000400 /* type 1 security disabled */ 135250003Sadrian#define RES_INSECURE2 0x00000800 /* type 2 security disabled */ 136250003Sadrian#define RES_NOALIASES 0x00001000 /* shuts off HOSTALIASES feature */ 137250003Sadrian 138250003Sadrian#define RES_DEFAULT (RES_RECURSE | RES_DEFNAMES | RES_DNSRCH) 139250003Sadrian 140250003Sadrian/* 141250003Sadrian * Resolver "pfcode" values. Used by dig. 142250003Sadrian */ 143250003Sadrian#define RES_PRF_STATS 0x00000001 144250003Sadrian/* 0x00000002 */ 145250003Sadrian#define RES_PRF_CLASS 0x00000004 146250003Sadrian#define RES_PRF_CMD 0x00000008 147250003Sadrian#define RES_PRF_QUES 0x00000010 148250003Sadrian#define RES_PRF_ANS 0x00000020 149250003Sadrian#define RES_PRF_AUTH 0x00000040 150250003Sadrian#define RES_PRF_ADD 0x00000080 151250003Sadrian#define RES_PRF_HEAD1 0x00000100 152250003Sadrian#define RES_PRF_HEAD2 0x00000200 153250003Sadrian#define RES_PRF_TTLID 0x00000400 154250003Sadrian#define RES_PRF_HEADX 0x00000800 155250003Sadrian#define RES_PRF_QUERY 0x00001000 156250003Sadrian#define RES_PRF_REPLY 0x00002000 157250003Sadrian#define RES_PRF_INIT 0x00004000 158250003Sadrian/* 0x00008000 */ 159250003Sadrian 160250003Sadrian/* hooks are still experimental as of 4.9.2 */ 161250003Sadriantypedef enum { res_goahead, res_nextns, res_modified, res_done, res_error } 162250003Sadrian res_sendhookact; 163250003Sadrian 164250003Sadriantypedef res_sendhookact (*res_send_qhook)__P((struct sockaddr_in * const *ns, 165250003Sadrian const u_char **query, 166250003Sadrian int *querylen, 167250003Sadrian u_char *ans, 168250003Sadrian int anssiz, 169250003Sadrian int *resplen)); 170250003Sadrian 171250003Sadriantypedef res_sendhookact (*res_send_rhook)__P((const struct sockaddr_in *ns, 172250003Sadrian const u_char *query, 173250003Sadrian int querylen, 174250003Sadrian u_char *ans, 175250003Sadrian int anssiz, 176250003Sadrian int *resplen)); 177250003Sadrian 178250003Sadrianextern struct __res_state _res; 179250003Sadrian 180250003Sadrian/* Private routines shared between libc/net, named, nslookup and others. */ 181250003Sadrian#define dn_skipname __dn_skipname 182250003Sadrian#define fp_query __fp_query 183250003Sadrian#define fp_nquery __fp_nquery 184250003Sadrian#define hostalias __hostalias 185250003Sadrian#define putlong __putlong 186250003Sadrian#define putshort __putshort 187250003Sadrian#define p_class __p_class 188250003Sadrian#define p_time __p_time 189250003Sadrian#define p_type __p_type 190250003Sadrian#define p_cdnname __p_cdnname 191250003Sadrian#define p_cdname __p_cdname 192250003Sadrian#define p_fqname __p_fqname 193250003Sadrian#define p_rr __p_rr 194250003Sadrian#define p_option __p_option 195250003Sadrian#define res_randomid __res_randomid 196250003Sadrian#define res_isourserver __res_isourserver 197250003Sadrian#define res_nameinquery __res_nameinquery 198250003Sadrian#define res_queriesmatch __res_queriesmatch 199250003Sadrian 200250003Sadrian__BEGIN_DECLS 201250003Sadrianint __dn_skipname __P((const u_char *, const u_char *)); 202250003Sadrianvoid __fp_resstat __P((struct __res_state *, FILE *)); 203250003Sadrianvoid __fp_query __P((const u_char *, FILE *)); 204250003Sadrianvoid __fp_nquery __P((const u_char *, int, FILE *)); 205250003Sadrianchar *__hostalias __P((const char *)); 206250003Sadrianvoid __putlong __P((u_int32_t, u_char *)); 207250003Sadrianvoid __putshort __P((u_int16_t, u_char *)); 208250003Sadrianchar *__p_time __P((u_int32_t)); 209250003Sadrianvoid __p_query __P((const u_char *)); 210250003Sadrianconst u_char *__p_cdnname __P((const u_char *, const u_char *, int, FILE *)); 211250003Sadrianconst u_char *__p_cdname __P((const u_char *, const u_char *, FILE *)); 212250003Sadrianconst u_char *__p_fqname __P((const u_char *, const u_char *, FILE *)); 213250003Sadrianconst u_char *__p_rr __P((const u_char *, const u_char *, FILE *)); 214250003Sadrianconst char *__p_type __P((int)); 215250003Sadrianconst char *__p_class __P((int)); 216250003Sadrianconst char *__p_option __P((u_long option)); 217250003Sadrianint dn_comp __P((const char *, u_char *, int, u_char **, u_char **)); 218250003Sadrianint dn_expand __P((const u_char *, const u_char *, const u_char *, 219250003Sadrian char *, int)); 220250003Sadrianint res_init __P((void)); 221250003Sadrianu_int16_t res_randomid __P((void)); 222250003Sadrianint res_query __P((const char *, int, int, u_char *, int)); 223250003Sadrianint res_search __P((const char *, int, int, u_char *, int)); 224250003Sadrianint res_querydomain __P((const char *, const char *, int, int, 225250003Sadrian u_char *, int)); 226250003Sadrianint res_mkquery __P((int, const char *, int, int, const u_char *, int, 227250003Sadrian const u_char *, u_char *, int)); 228250003Sadrianint res_send __P((const u_char *, int, u_char *, int)); 229250003Sadrianint res_isourserver __P((const struct sockaddr_in *)); 230250003Sadrianint res_nameinquery __P((const char *, int, int, 231250003Sadrian const u_char *, const u_char *)); 232250003Sadrianint res_queriesmatch __P((const u_char *, const u_char *, 233250003Sadrian const u_char *, const u_char *)); 234250003Sadrian__END_DECLS 235250003Sadrian 236250003Sadrian#endif /* !_RESOLV_H_ */ 237250003Sadrian