Annotation of src/include/resolv.h, Revision 1.1.1.1
1.1 deraadt 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_ */
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