1/* $NetBSD: resolve.h,v 1.2 2017/01/28 21:31:50 christos Exp $ */
2
3/*
4 * Copyright (c) 1995 - 2002 Kungliga Tekniska Högskolan
5 * (Royal Institute of Technology, Stockholm, Sweden).
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 *
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * 3. Neither the name of the Institute 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 INSTITUTE 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 INSTITUTE 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
36/* Id */
37
38#ifndef __RESOLVE_H__
39#define __RESOLVE_H__
40
41#ifndef ROKEN_LIB_FUNCTION
42#ifdef _WIN32
43#define ROKEN_LIB_FUNCTION
44#define ROKEN_LIB_CALL __cdecl
45#else
46#define ROKEN_LIB_FUNCTION
47#define ROKEN_LIB_CALL
48#endif
49#endif
50
51enum {
52 rk_ns_c_in = 1
53};
54
55enum {
56 rk_ns_t_invalid = 0, /* Cookie. */
57 rk_ns_t_a = 1, /* Host address. */
58 rk_ns_t_ns = 2, /* Authoritative server. */
59 rk_ns_t_md = 3, /* Mail destination. */
60 rk_ns_t_mf = 4, /* Mail forwarder. */
61 rk_ns_t_cname = 5, /* Canonical name. */
62 rk_ns_t_soa = 6, /* Start of authority zone. */
63 rk_ns_t_mb = 7, /* Mailbox domain name. */
64 rk_ns_t_mg = 8, /* Mail group member. */
65 rk_ns_t_mr = 9, /* Mail rename name. */
66 rk_ns_t_null = 10, /* Null resource record. */
67 rk_ns_t_wks = 11, /* Well known service. */
68 rk_ns_t_ptr = 12, /* Domain name pointer. */
69 rk_ns_t_hinfo = 13, /* Host information. */
70 rk_ns_t_minfo = 14, /* Mailbox information. */
71 rk_ns_t_mx = 15, /* Mail routing information. */
72 rk_ns_t_txt = 16, /* Text strings. */
73 rk_ns_t_rp = 17, /* Responsible person. */
74 rk_ns_t_afsdb = 18, /* AFS cell database. */
75 rk_ns_t_x25 = 19, /* X_25 calling address. */
76 rk_ns_t_isdn = 20, /* ISDN calling address. */
77 rk_ns_t_rt = 21, /* Router. */
78 rk_ns_t_nsap = 22, /* NSAP address. */
79 rk_ns_t_nsap_ptr = 23, /* Reverse NSAP lookup (deprecated). */
80 rk_ns_t_sig = 24, /* Security signature. */
81 rk_ns_t_key = 25, /* Security key. */
82 rk_ns_t_px = 26, /* X.400 mail mapping. */
83 rk_ns_t_gpos = 27, /* Geographical position (withdrawn). */
84 rk_ns_t_aaaa = 28, /* Ip6 Address. */
85 rk_ns_t_loc = 29, /* Location Information. */
86 rk_ns_t_nxt = 30, /* Next domain (security). */
87 rk_ns_t_eid = 31, /* Endpoint identifier. */
88 rk_ns_t_nimloc = 32, /* Nimrod Locator. */
89 rk_ns_t_srv = 33, /* Server Selection. */
90 rk_ns_t_atma = 34, /* ATM Address */
91 rk_ns_t_naptr = 35, /* Naming Authority PoinTeR */
92 rk_ns_t_kx = 36, /* Key Exchange */
93 rk_ns_t_cert = 37, /* Certification record */
94 rk_ns_t_a6 = 38, /* IPv6 address (deprecates AAAA) */
95 rk_ns_t_dname = 39, /* Non-terminal DNAME (for IPv6) */
96 rk_ns_t_sink = 40, /* Kitchen sink (experimentatl) */
97 rk_ns_t_opt = 41, /* EDNS0 option (meta-RR) */
98 rk_ns_t_apl = 42, /* Address prefix list (RFC 3123) */
99 rk_ns_t_ds = 43, /* Delegation Signer (RFC 3658) */
100 rk_ns_t_sshfp = 44, /* SSH fingerprint */
101 rk_ns_t_tkey = 249, /* Transaction key */
102 rk_ns_t_tsig = 250, /* Transaction signature. */
103 rk_ns_t_ixfr = 251, /* Incremental zone transfer. */
104 rk_ns_t_axfr = 252, /* Transfer zone of authority. */
105 rk_ns_t_mailb = 253, /* Transfer mailbox records. */
106 rk_ns_t_maila = 254, /* Transfer mail agent records. */
107 rk_ns_t_any = 255, /* Wildcard match. */
108 rk_ns_t_zxfr = 256, /* BIND-specific, nonstandard. */
109 rk_ns_t_max = 65536
110};
111
112#ifndef MAXDNAME
113#define MAXDNAME 1025
114#endif
115
116#define mx_record rk_mx_record
117#define srv_record rk_srv_record
118#define key_record rk_key_record
119#define sig_record rk_sig_record
120#define cert_record rk_cert_record
121#define sshfp_record rk_sshfp_record
122
123struct rk_dns_query{
124 char *domain;
125 unsigned type;
126 unsigned class;
127};
128
129struct rk_mx_record{
130 unsigned preference;
131 char domain[1];
132};
133
134struct rk_srv_record{
135 unsigned priority;
136 unsigned weight;
137 unsigned port;
138 char target[1];
139};
140
141struct rk_key_record {
142 unsigned flags;
143 unsigned protocol;
144 unsigned algorithm;
145 size_t key_len;
146 u_char key_data[1];
147};
148
149struct rk_sig_record {
150 unsigned type;
151 unsigned algorithm;
152 unsigned labels;
153 unsigned orig_ttl;
154 unsigned sig_expiration;
155 unsigned sig_inception;
156 unsigned key_tag;
157 char *signer;
158 size_t sig_len;
159 char sig_data[1]; /* also includes signer */
160};
161
162struct rk_cert_record {
163 unsigned type;
164 unsigned tag;
165 unsigned algorithm;
166 size_t cert_len;
167 u_char cert_data[1];
168};
169
170struct rk_sshfp_record {
171 unsigned algorithm;
172 unsigned type;
173 size_t sshfp_len;
174 u_char sshfp_data[1];
175};
176
177struct rk_ds_record {
178 unsigned key_tag;
179 unsigned algorithm;
180 unsigned digest_type;
181 size_t digest_len;
182 u_char digest_data[1];
183};
184
185struct rk_resource_record{
186 char *domain;
187 unsigned type;
188 unsigned class;
189 unsigned ttl;
190 unsigned size;
191 union {
192 void *data;
193 struct rk_mx_record *mx;
194 struct rk_mx_record *afsdb; /* mx and afsdb are identical */
195 struct rk_srv_record *srv;
196 struct in_addr *a;
197 char *txt;
198 struct rk_key_record *key;
199 struct rk_cert_record *cert;
200 struct rk_sig_record *sig;
201 struct rk_sshfp_record *sshfp;
202 struct rk_ds_record *ds;
203 }u;
204 struct rk_resource_record *next;
205};
206
207#define rk_DNS_MAX_PACKET_SIZE 0xffff
208
209struct rk_dns_header {
210 unsigned id;
211 unsigned flags;
212#define rk_DNS_HEADER_RESPONSE_FLAG 1
213#define rk_DNS_HEADER_AUTHORITIVE_ANSWER 2
214#define rk_DNS_HEADER_TRUNCATED_MESSAGE 4
215#define rk_DNS_HEADER_RECURSION_DESIRED 8
216#define rk_DNS_HEADER_RECURSION_AVAILABLE 16
217#define rk_DNS_HEADER_AUTHENTIC_DATA 32
218#define rk_DNS_HEADER_CHECKING_DISABLED 64
219 unsigned opcode;
220 unsigned response_code;
221 unsigned qdcount;
222 unsigned ancount;
223 unsigned nscount;
224 unsigned arcount;
225};
226
227struct rk_dns_reply{
228 struct rk_dns_header h;
229 struct rk_dns_query q;
230 struct rk_resource_record *head;
231};
232
233
234#ifdef __cplusplus
235extern "C" {
236#endif
237
238ROKEN_LIB_FUNCTION struct rk_dns_reply* ROKEN_LIB_CALL
239 rk_dns_lookup(const char *, const char *);
240ROKEN_LIB_FUNCTION void ROKEN_LIB_CALL
241 rk_dns_free_data(struct rk_dns_reply *);
242ROKEN_LIB_FUNCTION int ROKEN_LIB_CALL
243 rk_dns_string_to_type(const char *name);
244ROKEN_LIB_FUNCTION const char * ROKEN_LIB_CALL
245 rk_dns_type_to_string(int type);
246ROKEN_LIB_FUNCTION void ROKEN_LIB_CALL
247 rk_dns_srv_order(struct rk_dns_reply*);
248
249#ifdef __cplusplus
250}
251#endif
252
253#endif /* __RESOLVE_H__ */
254