| 1 | /* |
| 2 | * Copyright (c) 1983, 1987, 1989 The Regents of the University of California. |
| 3 | * 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 | * @(#)resolv.h 5.15 (Berkeley) 4/3/91 |
| 34 | */ |
| 35 | |
| 36 | #ifndef _RESOLV_H_ |
| 37 | #define _RESOLV_H_ |
| 38 | |
| 39 | /* |
| 40 | * Resolver configuration file. |
| 41 | * Normally not present, but may contain the address of the |
| 42 | * inital name server(s) to query and the domain search list. |
| 43 | */ |
| 44 | |
| 45 | #ifndef _PATH_RESCONF |
| 46 | #define _PATH_RESCONF "/etc/resolv.conf" |
| 47 | #endif |
| 48 | |
| 49 | /* |
| 50 | * Global defines and variables for resolver stub. |
| 51 | */ |
| 52 | #define MAXNS 3 /* max # name servers we'll track */ |
| 53 | #define MAXDFLSRCH 3 /* # default domain levels to try */ |
| 54 | #define MAXDNSRCH 6 /* max # domains in search path */ |
| 55 | #define LOCALDOMAINPARTS 2 /* min levels in name that is "local" */ |
| 56 | |
| 57 | #define RES_TIMEOUT 5 /* min. seconds between retries */ |
| 58 | |
| 59 | struct state { |
| 60 | int retrans; /* retransmition time interval */ |
| 61 | int retry; /* number of times to retransmit */ |
| 62 | long options; /* option flags - see below. */ |
| 63 | int nscount; /* number of name servers */ |
| 64 | struct sockaddr_in nsaddr_list[MAXNS]; /* address of name server */ |
| 65 | #define nsaddr nsaddr_list[0] /* for backward compatibility */ |
| 66 | u_short id; /* current packet id */ |
| 67 | char defdname[MAXDNAME]; /* default domain */ |
| 68 | char *dnsrch[MAXDNSRCH+1]; /* components of domain to search */ |
| 69 | }; |
| 70 | |
| 71 | /* |
| 72 | * Resolver options |
| 73 | */ |
| 74 | #define RES_INIT 0x0001 /* address initialized */ |
| 75 | #define RES_DEBUG 0x0002 /* print debug messages */ |
| 76 | #define RES_AAONLY 0x0004 /* authoritative answers only */ |
| 77 | #define RES_USEVC 0x0008 /* use virtual circuit */ |
| 78 | #define RES_PRIMARY 0x0010 /* query primary server only */ |
| 79 | #define RES_IGNTC 0x0020 /* ignore trucation errors */ |
| 80 | #define RES_RECURSE 0x0040 /* recursion desired */ |
| 81 | #define RES_DEFNAMES 0x0080 /* use default domain name */ |
| 82 | #define RES_STAYOPEN 0x0100 /* Keep TCP socket open */ |
| 83 | #define RES_DNSRCH 0x0200 /* search up local domain tree */ |
| 84 | |
| 85 | #define RES_DEFAULT (RES_RECURSE | RES_DEFNAMES | RES_DNSRCH) |
| 86 | |
| 87 | extern struct state _res; |
| 88 | |
| 89 | #include <sys/cdefs.h> |
| 90 | #include <stdio.h> |
| 91 | |
| 92 | /* Private routines shared between libc/net, named, nslookup and others. */ |
| 93 | #define dn_skipname __dn_skipname |
| 94 | #define fp_query __fp_query |
| 95 | #define hostalias __hostalias |
| 96 | #define putlong __putlong |
| 97 | #define putshort __putshort |
| 98 | #define p_class __p_class |
| 99 | #define p_time __p_time |
| 100 | #define p_type __p_type |
| 101 | __BEGIN_DECLS |
| 102 | int __dn_skipname __P((const u_char *, const u_char *)); |
| 103 | void __fp_query __P((char *, FILE *)); |
| 104 | char *__hostalias __P((const char *)); |
| 105 | void __putlong __P((u_long, u_char *)); |
| 106 | void __putshort __P((u_short, u_char *)); |
| 107 | char *__p_class __P((int)); |
| 108 | char *__p_time __P((u_long)); |
| 109 | char *__p_type __P((int)); |
| 110 | |
| 111 | int dn_comp __P((const u_char *, u_char *, int, u_char **, u_char **)); |
| 112 | int dn_expand __P((const u_char *, const u_char *, const u_char *, |
| 113 | u_char *, int)); |
| 114 | int res_init __P((void)); |
| 115 | int res_mkquery __P((int, const char *, int, int, const char *, int, |
| 116 | const struct rrec *, char *, int)); |
| 117 | int res_send __P((const char *, int, char *, int)); |
| 118 | __END_DECLS |
| 119 | |
| 120 | #endif /* !_RESOLV_H_ */ |