resolve.h revision 55682 
1/*
2 * Copyright (c) 1995, 1996, 1997, 1998 Kungliga Tekniska H�gskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 *
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 *
17 * 3. Neither the name of the Institute 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 INSTITUTE 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 INSTITUTE 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
34/* $Id: resolve.h,v 1.8 1999/12/02 16:58:52 joda Exp $ */
35
36#ifndef __RESOLVE_H__
37#define __RESOLVE_H__
38
39/* We use these, but they are not always present in <arpa/nameser.h> */
40
41#ifndef T_TXT
42#define T_TXT		16
43#endif
44#ifndef T_AFSDB
45#define T_AFSDB		18
46#endif
47#ifndef T_SRV
48#define T_SRV		33
49#endif
50#ifndef T_NAPTR
51#define T_NAPTR		35
52#endif
53
54struct dns_query{
55    char *domain;
56    unsigned type;
57    unsigned class;
58};
59
60struct mx_record{
61    unsigned  preference;
62    char domain[1];
63};
64
65struct srv_record{
66    unsigned priority;
67    unsigned weight;
68    unsigned port;
69    char target[1];
70};
71
72struct resource_record{
73    char *domain;
74    unsigned type;
75    unsigned class;
76    unsigned ttl;
77    unsigned size;
78    union {
79	void *data;
80	struct mx_record *mx;
81	struct mx_record *afsdb; /* mx and afsdb are identical */
82	struct srv_record *srv;
83	struct in_addr *a;
84	char *txt;
85    }u;
86    struct resource_record *next;
87};
88
89#ifndef T_A /* XXX if <arpa/nameser.h> isn't included */
90typedef int HEADER; /* will never be used */
91#endif
92
93struct dns_reply{
94    HEADER h;
95    struct dns_query q;
96    struct resource_record *head;
97};
98
99
100struct dns_reply* dns_lookup(const char *, const char *);
101void dns_free_data(struct dns_reply *);
102
103#endif /* __RESOLVE_H__ */
104