1 /*
2  * Copyright (c) 2000-2001 Sendmail, Inc. and its suppliers.
3  *	All rights reserved.
4  *
5  * By using this file, you agree to the terms and conditions set
6  * forth in the LICENSE file which can be found at the top level of
7  * the sendmail distribution.
8  *
9  */
10 
11 /*
12  * Copyright (c) 1995, 1996, 1997, 1998, 1999 Kungliga Tekniska H�gskolan
13  * (Royal Institute of Technology, Stockholm, Sweden).
14  * All rights reserved.
15  *
16  * Redistribution and use in source and binary forms, with or without
17  * modification, are permitted provided that the following conditions
18  * are met:
19  *
20  * 1. Redistributions of source code must retain the above copyright
21  *    notice, this list of conditions and the following disclaimer.
22  *
23  * 2. Redistributions in binary form must reproduce the above copyright
24  *    notice, this list of conditions and the following disclaimer in the
25  *    documentation and/or other materials provided with the distribution.
26  *
27  * 3. Neither the name of the Institute nor the names of its contributors
28  *    may be used to endorse or promote products derived from this software
29  *    without specific prior written permission.
30  *
31  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
32  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
33  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
34  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
35  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
36  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
37  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
38  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
39  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
40  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
41  * SUCH DAMAGE.
42  */
43 
44 /* $Id: sm_resolve.h,v 8.8 2001/09/01 00:06:02 gshapiro Exp $ */
45 
46 #if DNSMAP
47 # ifndef __ROKEN_RESOLVE_H__
48 #  define __ROKEN_RESOLVE_H__
49 
50 /* We use these, but they are not always present in <arpa/nameser.h> */
51 
52 #  ifndef T_TXT
53 #   define T_TXT		16
54 #  endif /* ! T_TXT */
55 #  ifndef T_AFSDB
56 #   define T_AFSDB		18
57 #  endif /* ! T_AFSDB */
58 #  ifndef T_SRV
59 #   define T_SRV		33
60 #  endif /* ! T_SRV */
61 #  ifndef T_NAPTR
62 #   define T_NAPTR		35
63 #  endif /* ! T_NAPTR */
64 
65 typedef struct
66 {
67 	char		*dns_q_domain;
68 	unsigned int	dns_q_type;
69 	unsigned int	dns_q_class;
70 } DNS_QUERY_T;
71 
72 typedef struct
73 {
74 	unsigned int	mx_r_preference;
75 	char		mx_r_domain[1];
76 } MX_RECORD_T;
77 
78 typedef struct
79 {
80 	unsigned int	srv_r_priority;
81 	unsigned int	srv_r_weight;
82 	unsigned int	srv_r_port;
83 	char		srv_r_target[1];
84 } SRV_RECORDT_T;
85 
86 
87 typedef struct resource_record RESOURCE_RECORD_T;
88 
89 struct resource_record
90 {
91 	char			*rr_domain;
92 	unsigned int		rr_type;
93 	unsigned int		rr_class;
94 	unsigned int		rr_ttl;
95 	unsigned int		rr_size;
96 	union
97 	{
98 		void		*rr_data;
99 		MX_RECORD_T	*rr_mx;
100 		MX_RECORD_T	*rr_afsdb; /* mx and afsdb are identical */
101 		SRV_RECORDT_T	*rr_srv;
102 #  if NETINET
103 		struct in_addr	*rr_a;
104 #  endif /* NETINET */
105 #  if NETINET6
106 		struct in6_addr *rr_aaaa;
107 #  endif /* NETINET6 */
108 		char		*rr_txt;
109 	} rr_u;
110 	RESOURCE_RECORD_T *rr_next;
111 };
112 
113 #  if !defined(T_A) && !defined(T_AAAA)
114 /* XXX if <arpa/nameser.h> isn't included */
115 typedef int HEADER; /* will never be used */
116 #  endif /* !defined(T_A) && !defined(T_AAAA)  */
117 
118 typedef struct
119 {
120 	HEADER			dns_r_h;
121 	DNS_QUERY_T		dns_r_q;
122 	RESOURCE_RECORD_T	*dns_r_head;
123 } DNS_REPLY_T;
124 
125 
126 extern void		dns_free_data __P((DNS_REPLY_T *));
127 extern int		dns_string_to_type __P((const char *));
128 extern const char	*dns_type_to_string __P((int));
129 extern DNS_REPLY_T	*dns_lookup_int __P((const char *,
130 				int,
131 				int,
132 				time_t,
133 				int));
134 #  if 0
135 extern DNS_REPLY_T	*dns_lookup __P((const char *domain,
136 				const char *type_name,
137 				time_t retrans,
138 				int retry));
139 #  endif /* 0 */
140 
141 # endif /* ! __ROKEN_RESOLVE_H__ */
142 #endif /* DNSMAP */
143