2 Linux DNS client library implementation
4 Copyright (C) 2006 Krishna Ganugapati <krishnag@centeris.com>
5 Copyright (C) 2006 Gerald Carter <jerry@samba.org>
7 ** NOTE! The following LGPL license applies to the libaddns
8 ** library. This does NOT imply that all of Samba is released
11 This library is free software; you can redistribute it and/or
12 modify it under the terms of the GNU Lesser General Public
13 License as published by the Free Software Foundation; either
14 version 2.1 of the License, or (at your option) any later version.
16 This library is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 Lesser General Public License for more details.
21 You should have received a copy of the GNU Lesser General Public
22 License along with this library; if not, see <http://www.gnu.org/licenses/>.
28 #include "../replace/replace.h"
29 #include "system/network.h"
30 #include "system/kerberos.h"
31 #include "system/gssapi.h"
33 /* make sure we have included the correct config.h */
34 #ifndef NO_CONFIG_H /* for some tests */
35 #ifndef CONFIG_H_IS_FROM_SAMBA
36 #error "make sure you have removed all config.h files from standalone builds!"
37 #error "the included config.h isn't from samba!"
39 #endif /* NO_CONFIG_H */
53 #define DNS_OPCODE_UPDATE 1
57 #define DNS_CLASS_IN 1
58 #define DNS_CLASS_ANY 255
59 #define DNS_CLASS_NONE 254
65 #define DNS_TCP_PORT 53
66 #define DNS_UDP_PORT 53
75 #define QTYPE_TKEY 249
76 #define QTYPE_TSIG 250
79 MF 4 a mail forwarder (Obsolete - use MX)
80 CNAME 5 the canonical name for an alias
81 SOA 6 marks the start of a zone of authority
82 MB 7 a mailbox domain name (EXPERIMENTAL)
83 MG 8 a mail group member (EXPERIMENTAL)
84 MR 9 a mail rename domain name (EXPERIMENTAL)
85 NULL 10 a null RR (EXPERIMENTAL)
86 WKS 11 a well known service description
87 PTR 12 a domain name pointer
88 HINFO 13 host information
89 MINFO 14 mailbox or mail list information
94 #define QR_QUERY 0x0000
95 #define QR_RESPONSE 0x0001
97 #define OPCODE_QUERY 0x00
98 #define OPCODE_IQUERY 0x01
99 #define OPCODE_STATUS 0x02
103 #define RECURSION_DESIRED 0x01
105 #define RCODE_NOERROR 0
106 #define RCODE_FORMATERROR 1
107 #define RCODE_SERVER_FAILURE 2
108 #define RCODE_NAME_ERROR 3
109 #define RCODE_NOTIMPLEMENTED 4
110 #define RCODE_REFUSED 5
112 #define SENDBUFFER_SIZE 65536
113 #define RECVBUFFER_SIZE 65536
116 * TKEY Modes from rfc2930
119 #define DNS_TKEY_MODE_SERVER 1
120 #define DNS_TKEY_MODE_DH 2
121 #define DNS_TKEY_MODE_GSSAPI 3
122 #define DNS_TKEY_MODE_RESOLVER 4
123 #define DNS_TKEY_MODE_DELETE 5
126 #define DNS_ONE_DAY_IN_SECS 86400
127 #define DNS_TEN_HOURS_IN_SECS 36000
129 #define SOCKET_ERROR -1
130 #define INVALID_SOCKET -1
132 #define DNS_NO_ERROR 0
133 #define DNS_FORMAT_ERROR 1
134 #define DNS_SERVER_FAILURE 2
135 #define DNS_NAME_ERROR 3
136 #define DNS_NOT_IMPLEMENTED 4
137 #define DNS_REFUSED 5
141 enum dns_ServerType
{ DNS_SRV_ANY
, DNS_SRV_WIN2000
, DNS_SRV_WIN2003
};
143 struct dns_domain_label
{
144 struct dns_domain_label
*next
;
149 struct dns_domain_name
{
150 struct dns_domain_label
*pLabelList
;
153 struct dns_question
{
154 struct dns_domain_name
*name
;
160 * Before changing the definition of dns_zone, look
161 * dns_marshall_update_request(), we rely on this being the same as
162 * dns_question right now.
166 struct dns_domain_name
*name
;
172 struct dns_domain_name
*name
;
176 uint16_t data_length
;
180 struct dns_tkey_record
{
181 struct dns_domain_name
*algorithm
;
193 uint16_t num_questions
;
194 uint16_t num_answers
;
196 uint16_t num_additionals
;
197 struct dns_question
**questions
;
198 struct dns_rrec
**answers
;
199 struct dns_rrec
**auths
;
200 struct dns_rrec
**additionals
;
204 * Before changing the definition of dns_update_request, look
205 * dns_marshall_update_request(), we rely on this being the same as
206 * dns_request right now.
209 struct dns_update_request
{
214 uint16_t num_updates
;
215 uint16_t num_additionals
;
216 struct dns_zone
**zones
;
217 struct dns_rrec
**preqs
;
218 struct dns_rrec
**updates
;
219 struct dns_rrec
**additionals
;
222 struct dns_connection
{
225 struct sockaddr RecvAddr
;
235 /* from dnsutils.c */
237 DNS_ERROR
dns_domain_name_from_string( TALLOC_CTX
*mem_ctx
,
238 const char *pszDomainName
,
239 struct dns_domain_name
**presult
);
240 char *dns_generate_keyname( TALLOC_CTX
*mem_ctx
);
242 /* from dnsrecord.c */
244 DNS_ERROR
dns_create_query( TALLOC_CTX
*mem_ctx
, const char *name
,
245 uint16_t q_type
, uint16_t q_class
,
246 struct dns_request
**preq
);
247 DNS_ERROR
dns_create_update( TALLOC_CTX
*mem_ctx
, const char *name
,
248 struct dns_update_request
**preq
);
249 DNS_ERROR
dns_create_probe(TALLOC_CTX
*mem_ctx
, const char *zone
,
250 const char *host
, int num_ips
,
251 const struct sockaddr_storage
*sslist
,
252 struct dns_update_request
**preq
);
253 DNS_ERROR
dns_create_rrec(TALLOC_CTX
*mem_ctx
, const char *name
,
254 uint16_t type
, uint16_t r_class
, uint32_t ttl
,
255 uint16_t data_length
, uint8_t *data
,
256 struct dns_rrec
**prec
);
257 DNS_ERROR
dns_add_rrec(TALLOC_CTX
*mem_ctx
, struct dns_rrec
*rec
,
258 uint16_t *num_records
, struct dns_rrec
***records
);
259 DNS_ERROR
dns_create_tkey_record(TALLOC_CTX
*mem_ctx
, const char *keyname
,
260 const char *algorithm_name
, time_t inception
,
261 time_t expiration
, uint16_t mode
, uint16_t error
,
262 uint16_t key_length
, const uint8_t *key
,
263 struct dns_rrec
**prec
);
264 DNS_ERROR
dns_create_name_in_use_record(TALLOC_CTX
*mem_ctx
,
266 const struct sockaddr_storage
*ip
,
267 struct dns_rrec
**prec
);
268 DNS_ERROR
dns_create_delete_record(TALLOC_CTX
*mem_ctx
, const char *name
,
269 uint16_t type
, uint16_t r_class
,
270 struct dns_rrec
**prec
);
271 DNS_ERROR
dns_create_name_not_in_use_record(TALLOC_CTX
*mem_ctx
,
272 const char *name
, uint32_t type
,
273 struct dns_rrec
**prec
);
274 DNS_ERROR
dns_create_a_record(TALLOC_CTX
*mem_ctx
, const char *host
,
275 uint32_t ttl
, const struct sockaddr_storage
*pss
,
276 struct dns_rrec
**prec
);
277 DNS_ERROR
dns_create_aaaa_record(TALLOC_CTX
*mem_ctx
, const char *host
,
278 uint32_t ttl
, const struct sockaddr_storage
*pss
,
279 struct dns_rrec
**prec
);
280 DNS_ERROR
dns_unmarshall_tkey_record(TALLOC_CTX
*mem_ctx
, struct dns_rrec
*rec
,
281 struct dns_tkey_record
**ptkey
);
282 DNS_ERROR
dns_create_tsig_record(TALLOC_CTX
*mem_ctx
, const char *keyname
,
283 const char *algorithm_name
,
284 time_t time_signed
, uint16_t fudge
,
285 uint16_t mac_length
, const uint8_t *mac
,
286 uint16_t original_id
, uint16_t error
,
287 struct dns_rrec
**prec
);
288 DNS_ERROR
dns_add_rrec(TALLOC_CTX
*mem_ctx
, struct dns_rrec
*rec
,
289 uint16_t *num_records
, struct dns_rrec
***records
);
290 DNS_ERROR
dns_create_update_request(TALLOC_CTX
*mem_ctx
,
291 const char *domainname
,
292 const char *hostname
,
293 const struct sockaddr_storage
*ip_addr
,
295 struct dns_update_request
**preq
);
299 DNS_ERROR
dns_open_connection( const char *nameserver
, int32_t dwType
,
301 struct dns_connection
**conn
);
302 DNS_ERROR
dns_send(struct dns_connection
*conn
, const struct dns_buffer
*buf
);
303 DNS_ERROR
dns_receive(TALLOC_CTX
*mem_ctx
, struct dns_connection
*conn
,
304 struct dns_buffer
**presult
);
305 DNS_ERROR
dns_transaction(TALLOC_CTX
*mem_ctx
, struct dns_connection
*conn
,
306 const struct dns_request
*req
,
307 struct dns_request
**resp
);
308 DNS_ERROR
dns_update_transaction(TALLOC_CTX
*mem_ctx
,
309 struct dns_connection
*conn
,
310 struct dns_update_request
*up_req
,
311 struct dns_update_request
**up_resp
);
313 /* from dnsmarshall.c */
315 struct dns_buffer
*dns_create_buffer(TALLOC_CTX
*mem_ctx
);
316 void dns_marshall_buffer(struct dns_buffer
*buf
, const uint8_t *data
,
318 void dns_marshall_uint16(struct dns_buffer
*buf
, uint16_t val
);
319 void dns_marshall_uint32(struct dns_buffer
*buf
, uint32_t val
);
320 void dns_unmarshall_buffer(struct dns_buffer
*buf
, uint8_t *data
,
322 void dns_unmarshall_uint16(struct dns_buffer
*buf
, uint16_t *val
);
323 void dns_unmarshall_uint32(struct dns_buffer
*buf
, uint32_t *val
);
324 void dns_unmarshall_domain_name(TALLOC_CTX
*mem_ctx
,
325 struct dns_buffer
*buf
,
326 struct dns_domain_name
**pname
);
327 void dns_marshall_domain_name(struct dns_buffer
*buf
,
328 const struct dns_domain_name
*name
);
329 void dns_unmarshall_domain_name(TALLOC_CTX
*mem_ctx
,
330 struct dns_buffer
*buf
,
331 struct dns_domain_name
**pname
);
332 DNS_ERROR
dns_marshall_request(TALLOC_CTX
*mem_ctx
,
333 const struct dns_request
*req
,
334 struct dns_buffer
**pbuf
);
335 DNS_ERROR
dns_unmarshall_request(TALLOC_CTX
*mem_ctx
,
336 struct dns_buffer
*buf
,
337 struct dns_request
**preq
);
338 DNS_ERROR
dns_marshall_update_request(TALLOC_CTX
*mem_ctx
,
339 struct dns_update_request
*update
,
340 struct dns_buffer
**pbuf
);
341 DNS_ERROR
dns_unmarshall_update_request(TALLOC_CTX
*mem_ctx
,
342 struct dns_buffer
*buf
,
343 struct dns_update_request
**pupreq
);
344 struct dns_request
*dns_update2request(struct dns_update_request
*update
);
345 struct dns_update_request
*dns_request2update(struct dns_request
*request
);
346 uint16_t dns_response_code(uint16_t flags
);
347 const char *dns_errstr(DNS_ERROR err
);
353 void display_status( const char *msg
, OM_uint32 maj_stat
, OM_uint32 min_stat
);
354 DNS_ERROR
dns_negotiate_sec_ctx( const char *target_realm
,
355 const char *servername
,
357 gss_ctx_id_t
*gss_ctx
,
358 enum dns_ServerType srv_type
);
359 DNS_ERROR
dns_sign_update(struct dns_update_request
*req
,
360 gss_ctx_id_t gss_ctx
,
362 const char *algorithmname
,
363 time_t time_signed
, uint16_t fudge
);
365 #endif /* HAVE_GSSAPI */