summaryrefslogtreecommitdiff
path: root/source3/libaddns/dns.h
blob: 51af9180d1548a9acaca7e49449a1b436f9d159b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
/*
  Linux DNS client library implementation

  Copyright (C) 2006 Krishna Ganugapati <krishnag@centeris.com>
  Copyright (C) 2006 Gerald Carter <jerry@samba.org>

     ** NOTE! The following LGPL license applies to the libaddns
     ** library. This does NOT imply that all of Samba is released
     ** under the LGPL

  This library is free software; you can redistribute it and/or
  modify it under the terms of the GNU Lesser General Public
  License as published by the Free Software Foundation; either
  version 2.1 of the License, or (at your option) any later version.

  This library is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  Lesser General Public License for more details.

  You should have received a copy of the GNU Lesser General Public
  License along with this library; if not, write to the Free Software
  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  
  02110-1301  USA
*/

#ifndef _DNS_H
#define _DNS_H

#include "config.h"

#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <time.h>
#include <string.h>
#include <errno.h>
#include <netdb.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <stdarg.h>

#ifdef HAVE_UUID_UUID_H
#include <uuid/uuid.h>
#endif

#ifdef HAVE_KRB5_H
#include <krb5.h>
#endif

#ifdef HAVE_INTTYPES_H
#include <inttypes.h>

#ifndef int16
#define int16 int16_t
#endif

#ifndef uint16
#define uint16 uint16_t
#endif

#ifndef int32
#define int32 int32_t
#endif

#ifndef uint32
#define uint32 uint32_t
#endif
#endif

#ifdef HAVE_KRB5_H
#include <krb5.h>
#endif

#if HAVE_GSSAPI_H
#include <gssapi.h>
#elif HAVE_GSSAPI_GSSAPI_H
#include <gssapi/gssapi.h>
#elif HAVE_GSSAPI_GSSAPI_GENERIC_H
#include <gssapi/gssapi_generic.h>
#endif

#if defined(HAVE_GSSAPI_H) || defined(HAVE_GSSAPI_GSSAPI_H) || defined(HAVE_GSSAPI_GSSAPI_GENERIC_H)
#define HAVE_GSSAPI_SUPPORT    1
#endif

#include <talloc.h>

#define TALLOC(ctx, size) talloc_named_const(ctx, size, __location__)
#define TALLOC_P(ctx, type) (type *)talloc_named_const(ctx, sizeof(type), #type)
#define TALLOC_ARRAY(ctx, type, count) (type *)_talloc_array(ctx, sizeof(type), count, #type)
#define TALLOC_MEMDUP(ctx, ptr, size) _talloc_memdup(ctx, ptr, size, __location__)
#define TALLOC_ZERO(ctx, size) _talloc_zero(ctx, size, __location__)
#define TALLOC_ZERO_P(ctx, type) (type *)_talloc_zero(ctx, sizeof(type), #type)
#define TALLOC_ZERO_ARRAY(ctx, type, count) (type *)_talloc_zero_array(ctx, sizeof(type), count, #type)
#define TALLOC_REALLOC(ctx, ptr, count) _talloc_realloc(ctx, ptr, count, __location__)
#define TALLOC_REALLOC_ARRAY(ctx, ptr, type, count) (type *)_talloc_realloc_array(ctx, ptr, sizeof(type), count, #type)
#define TALLOC_FREE(ctx) do { if ((ctx) != NULL) {talloc_free(ctx); ctx=NULL;} } while(0)

/*******************************************************************
   Type definitions for int16, int32, uint16 and uint32.  Needed
   for Samba coding style
*******************************************************************/

#ifndef uint8
#  define uint8 unsigned char
#endif

#if !defined(int16) && !defined(HAVE_INT16_FROM_RPC_RPC_H)
#  if (SIZEOF_SHORT == 4)
#    define int16 __ERROR___CANNOT_DETERMINE_TYPE_FOR_INT16;
#  else /* SIZEOF_SHORT != 4 */
#    define int16 short
#  endif /* SIZEOF_SHORT != 4 */
   /* needed to work around compile issue on HP-UX 11.x */
#  define _INT16        1
#endif

/*
 * Note we duplicate the size tests in the unsigned
 * case as int16 may be a typedef from rpc/rpc.h
 */

#if !defined(uint16) && !defined(HAVE_UINT16_FROM_RPC_RPC_H)
#  if (SIZEOF_SHORT == 4)
#    define uint16 __ERROR___CANNOT_DETERMINE_TYPE_FOR_INT16;
#  else /* SIZEOF_SHORT != 4 */
#    define uint16 unsigned short
#  endif /* SIZEOF_SHORT != 4 */
#endif

#if !defined(int32) && !defined(HAVE_INT32_FROM_RPC_RPC_H)
#  if (SIZEOF_INT == 4)
#    define int32 int
#  elif (SIZEOF_LONG == 4)
#    define int32 long
#  elif (SIZEOF_SHORT == 4)
#    define int32 short
#  else
     /* uggh - no 32 bit type?? probably a CRAY. just hope this works ... */
#    define int32 int
#  endif
   /* needed to work around compile issue on HP-UX 11.x */
#  define _INT32        1
#endif

/*
 * Note we duplicate the size tests in the unsigned
 * case as int32 may be a typedef from rpc/rpc.h
 */

#if !defined(uint32) && !defined(HAVE_UINT32_FROM_RPC_RPC_H)
#  if (SIZEOF_INT == 4)
#    define uint32 unsigned int
#  elif (SIZEOF_LONG == 4)
#    define uint32 unsigned long
#  elif (SIZEOF_SHORT == 4)
#    define uint32 unsigned short
#  else
      /* uggh - no 32 bit type?? probably a CRAY. just hope this works ... */
#    define uint32 unsigned
#  endif
#endif

/*
 * check for 8 byte long long
 */

#if !defined(uint64)
#  if (SIZEOF_LONG == 8)
#    define uint64 unsigned long
#  elif (SIZEOF_LONG_LONG == 8)
#    define uint64 unsigned long long
#  endif /* don't lie.  If we don't have it, then don't use it */
#endif

/* needed on Sun boxes */
#ifndef INADDR_NONE
#define INADDR_NONE          0xFFFFFFFF
#endif

#include "dnserr.h"


#define DNS_TCP			1
#define DNS_UDP			2

#define DNS_OPCODE_UPDATE	1

/* DNS Class Types */

#define DNS_CLASS_IN		1
#define DNS_CLASS_ANY		255
#define DNS_CLASS_NONE		254

/* DNS RR Types */

#define DNS_RR_A		1

#define DNS_TCP_PORT		53
#define DNS_UDP_PORT		53

#define QTYPE_A         1
#define QTYPE_NS        2
#define QTYPE_MD        3
#define QTYPE_CNAME	5
#define QTYPE_SOA	6
#define QTYPE_ANY	255
#define	QTYPE_TKEY	249
#define QTYPE_TSIG	250

/*
MF              4 a mail forwarder (Obsolete - use MX)
CNAME           5 the canonical name for an alias
SOA             6 marks the start of a zone of authority
MB              7 a mailbox domain name (EXPERIMENTAL)
MG              8 a mail group member (EXPERIMENTAL)
MR              9 a mail rename domain name (EXPERIMENTAL)
NULL            10 a null RR (EXPERIMENTAL)
WKS             11 a well known service description
PTR             12 a domain name pointer
HINFO           13 host information
MINFO           14 mailbox or mail list information
MX              15 mail exchange
TXT             16 text strings
*/

#define QR_QUERY	 0x0000
#define QR_RESPONSE	 0x0001

#define OPCODE_QUERY 0x00
#define OPCODE_IQUERY	0x01
#define OPCODE_STATUS	0x02

#define AA			1

#define RECURSION_DESIRED	0x01

#define RCODE_NOERROR          0
#define RCODE_FORMATERROR      1
#define RCODE_SERVER_FAILURE   2
#define RCODE_NAME_ERROR       3
#define RCODE_NOTIMPLEMENTED   4
#define RCODE_REFUSED          5

#define SENDBUFFER_SIZE		65536
#define RECVBUFFER_SIZE		65536

/*
 * TKEY Modes from rfc2930
 */

#define DNS_TKEY_MODE_SERVER   1
#define DNS_TKEY_MODE_DH       2
#define DNS_TKEY_MODE_GSSAPI   3
#define DNS_TKEY_MODE_RESOLVER 4
#define DNS_TKEY_MODE_DELETE   5


#define DNS_ONE_DAY_IN_SECS	86400
#define DNS_TEN_HOURS_IN_SECS	36000

#define SOCKET_ERROR 		-1
#define INVALID_SOCKET		-1

#define  DNS_NO_ERROR		0
#define  DNS_FORMAT_ERROR	1
#define  DNS_SERVER_FAILURE	2
#define  DNS_NAME_ERROR		3
#define  DNS_NOT_IMPLEMENTED	4
#define  DNS_REFUSED		5

typedef long HANDLE;

#ifndef _UPPER_BOOL
typedef int BOOL;
#define _UPPER_BOOL
#endif


struct dns_domain_label {
	struct dns_domain_label *next;
	char *label;
	size_t len;
};

struct dns_domain_name {
	struct dns_domain_label *pLabelList;
};

struct dns_question {
	struct dns_domain_name *name;
	uint16 q_type;
	uint16 q_class;
};

/*
 * Before changing the definition of dns_zone, look
 * dns_marshall_update_request(), we rely on this being the same as
 * dns_question right now.
 */

struct dns_zone {
	struct dns_domain_name *name;
	uint16 z_type;
	uint16 z_class;
};

struct dns_rrec {
	struct dns_domain_name *name;
	uint16 type;
	uint16 r_class;
	uint32 ttl;
	uint16 data_length;
	uint8 *data;
};

struct dns_tkey_record {
	struct dns_domain_name *algorithm;
	time_t inception;
	time_t expiration;
	uint16 mode;
	uint16 error;
	uint16 key_length;
	uint8 *key;
};

struct dns_request {
	uint16 id;
	uint16 flags;
	uint16 num_questions;
	uint16 num_answers;
	uint16 num_auths;
	uint16 num_additionals;
	struct dns_question **questions;
	struct dns_rrec **answers;
	struct dns_rrec **auths;
	struct dns_rrec **additionals;
};

/*
 * Before changing the definition of dns_update_request, look
 * dns_marshall_update_request(), we rely on this being the same as
 * dns_request right now.
 */

struct dns_update_request {
	uint16 id;
	uint16 flags;
	uint16 num_zones;
	uint16 num_preqs;
	uint16 num_updates;
	uint16 num_additionals;
	struct dns_zone **zones;
	struct dns_rrec **preqs;
	struct dns_rrec **updates;
	struct dns_rrec **additionals;
};

struct dns_connection {
	int32 hType;
	int s;
	struct sockaddr RecvAddr;
};

struct dns_buffer {
	uint8 *data;
	size_t size;
	size_t offset;
	DNS_ERROR error;
};

/* from dnsutils.c */

DNS_ERROR dns_domain_name_from_string( TALLOC_CTX *mem_ctx,
				       const char *pszDomainName,
				       struct dns_domain_name **presult );
char *dns_generate_keyname( TALLOC_CTX *mem_ctx );

/* from dnsrecord.c */

DNS_ERROR dns_create_query( TALLOC_CTX *mem_ctx, const char *name,
			    uint16 q_type, uint16 q_class,
			    struct dns_request **preq );
DNS_ERROR dns_create_update( TALLOC_CTX *mem_ctx, const char *name,
			     struct dns_update_request **preq );
DNS_ERROR dns_create_probe(TALLOC_CTX *mem_ctx, const char *zone,
			   const char *host, int num_ips,
			   const struct in_addr *iplist,
			   struct dns_update_request **preq);
DNS_ERROR dns_create_rrec(TALLOC_CTX *mem_ctx, const char *name,
			  uint16 type, uint16 r_class, uint32 ttl,
			  uint16 data_length, uint8 *data,
			  struct dns_rrec **prec);
DNS_ERROR dns_add_rrec(TALLOC_CTX *mem_ctx, struct dns_rrec *rec,
		       uint16 *num_records, struct dns_rrec ***records);
DNS_ERROR dns_create_tkey_record(TALLOC_CTX *mem_ctx, const char *keyname,
				 const char *algorithm_name, time_t inception,
				 time_t expiration, uint16 mode, uint16 error,
				 uint16 key_length, const uint8 *key,
				 struct dns_rrec **prec);
DNS_ERROR dns_create_name_in_use_record(TALLOC_CTX *mem_ctx,
					const char *name,
					const in_addr_t *ip,
					struct dns_rrec **prec);
DNS_ERROR dns_create_delete_record(TALLOC_CTX *mem_ctx, const char *name,
				   uint16 type, uint16 r_class,
				   struct dns_rrec **prec);
DNS_ERROR dns_create_a_record(TALLOC_CTX *mem_ctx, const char *host,
			      uint32 ttl, in_addr_t ip,
			      struct dns_rrec **prec);
DNS_ERROR dns_unmarshall_tkey_record(TALLOC_CTX *mem_ctx, struct dns_rrec *rec,
				     struct dns_tkey_record **ptkey);
DNS_ERROR dns_create_tsig_record(TALLOC_CTX *mem_ctx, const char *keyname,
				 const char *algorithm_name,
				 time_t time_signed, uint16 fudge,
				 uint16 mac_length, const uint8 *mac,
				 uint16 original_id, uint16 error,
				 struct dns_rrec **prec);
DNS_ERROR dns_add_rrec(TALLOC_CTX *mem_ctx, struct dns_rrec *rec,
		       uint16 *num_records, struct dns_rrec ***records);

/* from dnssock.c */

DNS_ERROR dns_open( const char *nameserver, int32 dwType,
		    TALLOC_CTX *mem_ctx,
		    struct dns_connection **conn );
DNS_ERROR dns_send(struct dns_connection *conn, const struct dns_buffer *buf);
DNS_ERROR dns_receive(TALLOC_CTX *mem_ctx, struct dns_connection *conn,
		      struct dns_buffer **presult);
DNS_ERROR dns_transaction(TALLOC_CTX *mem_ctx, struct dns_connection *conn,
			  const struct dns_request *req,
			  struct dns_request **resp);
DNS_ERROR dns_update_transaction(TALLOC_CTX *mem_ctx,
				 struct dns_connection *conn,
				 struct dns_update_request *up_req,
				 struct dns_update_request **up_resp);

/* from dnsmarshall.c */

struct dns_buffer *dns_create_buffer(TALLOC_CTX *mem_ctx);
void dns_marshall_buffer(struct dns_buffer *buf, const uint8 *data,
			 size_t len);
void dns_marshall_uint16(struct dns_buffer *buf, uint16 val);
void dns_marshall_uint32(struct dns_buffer *buf, uint32 val);
void dns_unmarshall_buffer(struct dns_buffer *buf, uint8 *data,
			   size_t len);
void dns_unmarshall_uint16(struct dns_buffer *buf, uint16 *val);
void dns_unmarshall_uint32(struct dns_buffer *buf, uint32 *val);
void dns_unmarshall_domain_name(TALLOC_CTX *mem_ctx,
				struct dns_buffer *buf,
				struct dns_domain_name **pname);
void dns_marshall_domain_name(struct dns_buffer *buf,
			      const struct dns_domain_name *name);
void dns_unmarshall_domain_name(TALLOC_CTX *mem_ctx,
				struct dns_buffer *buf,
				struct dns_domain_name **pname);
DNS_ERROR dns_marshall_request(TALLOC_CTX *mem_ctx,
			       const struct dns_request *req,
			       struct dns_buffer **pbuf);
DNS_ERROR dns_unmarshall_request(TALLOC_CTX *mem_ctx,
				 struct dns_buffer *buf,
				 struct dns_request **preq);
DNS_ERROR dns_marshall_update_request(TALLOC_CTX *mem_ctx,
				      struct dns_update_request *update,
				      struct dns_buffer **pbuf);
DNS_ERROR dns_unmarshall_update_request(TALLOC_CTX *mem_ctx,
					struct dns_buffer *buf,
					struct dns_update_request **pupreq);
struct dns_request *dns_update2request(struct dns_update_request *update);
struct dns_update_request *dns_request2update(struct dns_request *request);
uint16 dns_response_code(uint16 flags);

/* from dnsgss.c */

#ifdef HAVE_GSSAPI_SUPPORT

void display_status( const char *msg, OM_uint32 maj_stat, OM_uint32 min_stat ); 
DNS_ERROR dns_negotiate_sec_ctx( const char *target_realm,
				 const char *servername,
				 const char *keyname,
				 gss_ctx_id_t *gss_ctx );
DNS_ERROR dns_sign_update(struct dns_update_request *req,
			  gss_ctx_id_t gss_ctx,
			  const char *keyname,
			  const char *algorithmname,
			  time_t time_signed, uint16 fudge);
DNS_ERROR dns_create_update_request(TALLOC_CTX *mem_ctx,
				    const char *domainname,
				    const char *hostname,
				    in_addr_t ip_addr,
				    struct dns_update_request **preq);

#endif	/* HAVE_GSSAPI_SUPPORT */

#endif	/* _DNS_H */