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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_ */ |