resolve.h revision 72445 
1/*
2 * Copyright (c) 1995 - 2000 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 1.12 2000/10/15 21:28:56 assar 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_SIG
48#define T_SIG		24
49#endif
50#ifndef T_KEY
51#define T_KEY		25
52#endif
53#ifndef T_SRV
54#define T_SRV		33
55#endif
56#ifndef T_NAPTR
57#define T_NAPTR		35
58#endif
59#ifndef T_CERT
60#define T_CERT		37
61#endif
62
63struct dns_query{
64    char *domain;
65    unsigned type;
66    unsigned class;
67};
68
69struct mx_record{
70    unsigned  preference;
71    char domain[1];
72};
73
74struct srv_record{
75    unsigned priority;
76    unsigned weight;
77    unsigned port;
78    char target[1];
79};
80
81struct key_record {
82    unsigned flags;
83    unsigned protocol;
84    unsigned algorithm;
85    size_t   key_len;
86    u_char   key_data[1];
87};
88
89struct sig_record {
90    unsigned type;
91    unsigned algorithm;
92    unsigned labels;
93    unsigned orig_ttl;
94    unsigned sig_expiration;
95    unsigned sig_inception;
96    unsigned key_tag;
97    char     *signer;
98    unsigned sig_len;
99    char     sig_data[1];	/* also includes signer */
100};
101
102struct cert_record {
103    unsigned type;
104    unsigned tag;
105    unsigned algorithm;
106    size_t   cert_len;
107    u_char   cert_data[1];
108};
109
110struct resource_record{
111    char *domain;
112    unsigned type;
113    unsigned class;
114    unsigned ttl;
115    unsigned size;
116    union {
117	void *data;
118	struct mx_record *mx;
119	struct mx_record *afsdb; /* mx and afsdb are identical */
120	struct srv_record *srv;
121	struct in_addr *a;
122	char *txt;
123	struct key_record *key;
124	struct cert_record *cert;
125	struct sig_record *sig;
126    }u;
127    struct resource_record *next;
128};
129
130#ifndef T_A /* XXX if <arpa/nameser.h> isn't included */
131typedef int HEADER; /* will never be used */
132#endif
133
134struct dns_reply{
135    HEADER h;
136    struct dns_query q;
137    struct resource_record *head;
138};
139
140
141struct dns_reply* dns_lookup(const char *, const char *);
142void dns_free_data(struct dns_reply *);
143int dns_string_to_type(const char *name);
144const char *dns_type_to_string(int type);
145
146#endif /* __RESOLVE_H__ */
147