source: vendor/3.5.4/source3/libaddns/dns.h

Last change on this file was 414, checked in by Herwig Bauernfeind, 16 years ago

Samba 3.5.0: Initial import
File size: 15.7 KB
Line 
1/*
2 Linux DNS client library implementation
3
4 Copyright (C) 2006 Krishna Ganugapati <krishnag@centeris.com>
5 Copyright (C) 2006 Gerald Carter <jerry@samba.org>
6
7 ** NOTE! The following LGPL license applies to the libaddns
8 ** library. This does NOT imply that all of Samba is released
9 ** under the LGPL
10
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.
15
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.
20
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/>.
23*/
24
25#ifndef _DNS_H
26#define _DNS_H
27
28#include "../replace/replace.h"
29#include "system/network.h"
30
31/* make sure we have included the correct config.h */
32#ifndef NO_CONFIG_H /* for some tests */
33#ifndef CONFIG_H_IS_FROM_SAMBA
34#error "make sure you have removed all config.h files from standalone builds!"
35#error "the included config.h isn't from samba!"
36#endif
37#endif /* NO_CONFIG_H */
38
39#include <stdio.h>
40#include <stdlib.h>
41#include <fcntl.h>
42#include <time.h>
43#include <string.h>
44#include <errno.h>
45#include <netdb.h>
46#include <sys/types.h>
47#include <sys/socket.h>
48#include <netinet/in.h>
49#include <arpa/inet.h>
50#include <stdarg.h>
51
52#ifdef HAVE_UUID_UUID_H
53#include <uuid/uuid.h>
54#endif
55
56#ifdef HAVE_KRB5_H
57#include <krb5.h>
58#endif
59
60#ifdef HAVE_INTTYPES_H
61#include <inttypes.h>
62
63#ifndef int16
64#define int16 int16_t
65#endif
66
67#ifndef uint16
68#define uint16 uint16_t
69#endif
70
71#ifndef int32
72#define int32 int32_t
73#endif
74
75#ifndef uint32
76#define uint32 uint32_t
77#endif
78#endif
79
80#ifdef HAVE_KRB5_H
81#include <krb5.h>
82#endif
83
84#if HAVE_GSSAPI_GSSAPI_H
85#include <gssapi/gssapi.h>
86#elif HAVE_GSSAPI_GSSAPI_GENERIC_H
87#include <gssapi/gssapi_generic.h>
88#elif HAVE_GSSAPI_H
89#include <gssapi.h>
90#endif
91
92#if defined(HAVE_GSSAPI_H) || defined(HAVE_GSSAPI_GSSAPI_H) || defined(HAVE_GSSAPI_GSSAPI_GENERIC_H)
93#define HAVE_GSSAPI_SUPPORT 1
94#endif
95
96#include <talloc.h>
97
98#if 0
99
100Disable these now we have checked all code paths and ensured
101NULL returns on zero request. JRA.
102
103void *_talloc_zero_zeronull(const void *ctx, size_t size, const char *name);
104void *_talloc_memdup_zeronull(const void *t, const void *p, size_t size, const char *name);
105void *_talloc_array_zeronull(const void *ctx, size_t el_size, unsigned count, const char *name);
106void *_talloc_zero_array_zeronull(const void *ctx, size_t el_size, unsigned count, const char *name);
107void *talloc_zeronull(const void *context, size_t size, const char *name);
108
109#define TALLOC(ctx, size) talloc_zeronull(ctx, size, __location__)
110#define TALLOC_P(ctx, type) (type *)talloc_zeronull(ctx, sizeof(type), #type)
111#define TALLOC_ARRAY(ctx, type, count) (type *)_talloc_array_zeronull(ctx, sizeof(type), count, #type)
112#define TALLOC_MEMDUP(ctx, ptr, size) _talloc_memdup_zeronull(ctx, ptr, size, __location__)
113#define TALLOC_ZERO(ctx, size) _talloc_zero_zeronull(ctx, size, __location__)
114#define TALLOC_ZERO_P(ctx, type) (type *)_talloc_zero_zeronull(ctx, sizeof(type), #type)
115#define TALLOC_ZERO_ARRAY(ctx, type, count) (type *)_talloc_zero_array_zeronull(ctx, sizeof(type), count, #type)
116#define TALLOC_SIZE(ctx, size) talloc_zeronull(ctx, size, __location__)
117#define TALLOC_ZERO_SIZE(ctx, size) _talloc_zero_zeronull(ctx, size, __location__)
118
119#else
120
121#define TALLOC(ctx, size) talloc_named_const(ctx, size, __location__)
122#define TALLOC_P(ctx, type) (type *)talloc_named_const(ctx, sizeof(type), #type)
123#define TALLOC_ARRAY(ctx, type, count) (type *)_talloc_array(ctx, sizeof(type), count, #type)
124#define TALLOC_MEMDUP(ctx, ptr, size) _talloc_memdup(ctx, ptr, size, __location__)
125#define TALLOC_ZERO(ctx, size) _talloc_zero(ctx, size, __location__)
126#define TALLOC_ZERO_P(ctx, type) (type *)_talloc_zero(ctx, sizeof(type), #type)
127#define TALLOC_ZERO_ARRAY(ctx, type, count) (type *)_talloc_zero_array(ctx, sizeof(type), count, #type)
128#define TALLOC_SIZE(ctx, size) talloc_named_const(ctx, size, __location__)
129#define TALLOC_ZERO_SIZE(ctx, size) _talloc_zero(ctx, size, __location__)
130
131#endif
132
133#define TALLOC_REALLOC(ctx, ptr, count) _talloc_realloc(ctx, ptr, count, __location__)
134#define TALLOC_REALLOC_ARRAY(ctx, ptr, type, count) (type *)_talloc_realloc_array(ctx, ptr, sizeof(type), count, #type)
135#define talloc_destroy(ctx) talloc_free(ctx)
136#ifndef TALLOC_FREE
137#define TALLOC_FREE(ctx) do { talloc_free(ctx); ctx=NULL; } while(0)
138#endif
139
140/*******************************************************************
141 Type definitions for int16, int32, uint16 and uint32. Needed
142 for Samba coding style
143*******************************************************************/
144
145#ifndef uint8
146# define uint8 unsigned char
147#endif
148
149#if !defined(int16) && !defined(HAVE_INT16_FROM_RPC_RPC_H)
150# if (SIZEOF_SHORT == 4)
151# define int16 __ERROR___CANNOT_DETERMINE_TYPE_FOR_INT16;
152# else /* SIZEOF_SHORT != 4 */
153# define int16 short
154# endif /* SIZEOF_SHORT != 4 */
155 /* needed to work around compile issue on HP-UX 11.x */
156# define _INT16 1
157#endif
158
159/*
160 * Note we duplicate the size tests in the unsigned
161 * case as int16 may be a typedef from rpc/rpc.h
162 */
163
164#if !defined(uint16) && !defined(HAVE_UINT16_FROM_RPC_RPC_H)
165# if (SIZEOF_SHORT == 4)
166# define uint16 __ERROR___CANNOT_DETERMINE_TYPE_FOR_INT16;
167# else /* SIZEOF_SHORT != 4 */
168# define uint16 unsigned short
169# endif /* SIZEOF_SHORT != 4 */
170#endif
171
172#if !defined(int32) && !defined(HAVE_INT32_FROM_RPC_RPC_H)
173# if (SIZEOF_INT == 4)
174# define int32 int
175# elif (SIZEOF_LONG == 4)
176# define int32 long
177# elif (SIZEOF_SHORT == 4)
178# define int32 short
179# else
180 /* uggh - no 32 bit type?? probably a CRAY. just hope this works ... */
181# define int32 int
182# endif
183# ifndef _INT32
184 /* needed to work around compile issue on HP-UX 11.x */
185# define _INT32 1
186# endif
187#endif
188
189/*
190 * Note we duplicate the size tests in the unsigned
191 * case as int32 may be a typedef from rpc/rpc.h
192 */
193
194#if !defined(uint32) && !defined(HAVE_UINT32_FROM_RPC_RPC_H)
195# if (SIZEOF_INT == 4)
196# define uint32 unsigned int
197# elif (SIZEOF_LONG == 4)
198# define uint32 unsigned long
199# elif (SIZEOF_SHORT == 4)
200# define uint32 unsigned short
201# else
202 /* uggh - no 32 bit type?? probably a CRAY. just hope this works ... */
203# define uint32 unsigned
204# endif
205#endif
206
207/*
208 * check for 8 byte long long
209 */
210
211#if !defined(uint64)
212# if (SIZEOF_LONG == 8)
213# define uint64 unsigned long
214# elif (SIZEOF_LONG_LONG == 8)
215# define uint64 unsigned long long
216# endif /* don't lie. If we don't have it, then don't use it */
217#endif
218
219/* needed on Sun boxes */
220#ifndef INADDR_NONE
221#define INADDR_NONE 0xFFFFFFFF
222#endif
223
224#include "dnserr.h"
225
226
227#define DNS_TCP 1
228#define DNS_UDP 2
229
230#define DNS_OPCODE_UPDATE 1
231
232/* DNS Class Types */
233
234#define DNS_CLASS_IN 1
235#define DNS_CLASS_ANY 255
236#define DNS_CLASS_NONE 254
237
238/* DNS RR Types */
239
240#define DNS_RR_A 1
241
242#define DNS_TCP_PORT 53
243#define DNS_UDP_PORT 53
244
245#define QTYPE_A 1
246#define QTYPE_NS 2
247#define QTYPE_MD 3
248#define QTYPE_CNAME 5
249#define QTYPE_SOA 6
250#define QTYPE_ANY 255
251#define QTYPE_TKEY 249
252#define QTYPE_TSIG 250
253
254/*
255MF 4 a mail forwarder (Obsolete - use MX)
256CNAME 5 the canonical name for an alias
257SOA 6 marks the start of a zone of authority
258MB 7 a mailbox domain name (EXPERIMENTAL)
259MG 8 a mail group member (EXPERIMENTAL)
260MR 9 a mail rename domain name (EXPERIMENTAL)
261NULL 10 a null RR (EXPERIMENTAL)
262WKS 11 a well known service description
263PTR 12 a domain name pointer
264HINFO 13 host information
265MINFO 14 mailbox or mail list information
266MX 15 mail exchange
267TXT 16 text strings
268*/
269
270#define QR_QUERY 0x0000
271#define QR_RESPONSE 0x0001
272
273#define OPCODE_QUERY 0x00
274#define OPCODE_IQUERY 0x01
275#define OPCODE_STATUS 0x02
276
277#define AA 1
278
279#define RECURSION_DESIRED 0x01
280
281#define RCODE_NOERROR 0
282#define RCODE_FORMATERROR 1
283#define RCODE_SERVER_FAILURE 2
284#define RCODE_NAME_ERROR 3
285#define RCODE_NOTIMPLEMENTED 4
286#define RCODE_REFUSED 5
287
288#define SENDBUFFER_SIZE 65536
289#define RECVBUFFER_SIZE 65536
290
291/*
292 * TKEY Modes from rfc2930
293 */
294
295#define DNS_TKEY_MODE_SERVER 1
296#define DNS_TKEY_MODE_DH 2
297#define DNS_TKEY_MODE_GSSAPI 3
298#define DNS_TKEY_MODE_RESOLVER 4
299#define DNS_TKEY_MODE_DELETE 5
300
301
302#define DNS_ONE_DAY_IN_SECS 86400
303#define DNS_TEN_HOURS_IN_SECS 36000
304
305#define SOCKET_ERROR -1
306#define INVALID_SOCKET -1
307
308#define DNS_NO_ERROR 0
309#define DNS_FORMAT_ERROR 1
310#define DNS_SERVER_FAILURE 2
311#define DNS_NAME_ERROR 3
312#define DNS_NOT_IMPLEMENTED 4
313#define DNS_REFUSED 5
314
315typedef long HANDLE;
316
317enum dns_ServerType { DNS_SRV_ANY, DNS_SRV_WIN2000, DNS_SRV_WIN2003 };
318
319struct dns_domain_label {
320 struct dns_domain_label *next;
321 char *label;
322 size_t len;
323};
324
325struct dns_domain_name {
326 struct dns_domain_label *pLabelList;
327};
328
329struct dns_question {
330 struct dns_domain_name *name;
331 uint16 q_type;
332 uint16 q_class;
333};
334
335/*
336 * Before changing the definition of dns_zone, look
337 * dns_marshall_update_request(), we rely on this being the same as
338 * dns_question right now.
339 */
340
341struct dns_zone {
342 struct dns_domain_name *name;
343 uint16 z_type;
344 uint16 z_class;
345};
346
347struct dns_rrec {
348 struct dns_domain_name *name;
349 uint16 type;
350 uint16 r_class;
351 uint32 ttl;
352 uint16 data_length;
353 uint8 *data;
354};
355
356struct dns_tkey_record {
357 struct dns_domain_name *algorithm;
358 time_t inception;
359 time_t expiration;
360 uint16 mode;
361 uint16 error;
362 uint16 key_length;
363 uint8 *key;
364};
365
366struct dns_request {
367 uint16 id;
368 uint16 flags;
369 uint16 num_questions;
370 uint16 num_answers;
371 uint16 num_auths;
372 uint16 num_additionals;
373 struct dns_question **questions;
374 struct dns_rrec **answers;
375 struct dns_rrec **auths;
376 struct dns_rrec **additionals;
377};
378
379/*
380 * Before changing the definition of dns_update_request, look
381 * dns_marshall_update_request(), we rely on this being the same as
382 * dns_request right now.
383 */
384
385struct dns_update_request {
386 uint16 id;
387 uint16 flags;
388 uint16 num_zones;
389 uint16 num_preqs;
390 uint16 num_updates;
391 uint16 num_additionals;
392 struct dns_zone **zones;
393 struct dns_rrec **preqs;
394 struct dns_rrec **updates;
395 struct dns_rrec **additionals;
396};
397
398struct dns_connection {
399 int32 hType;
400 int s;
401 struct sockaddr RecvAddr;
402};
403
404struct dns_buffer {
405 uint8 *data;
406 size_t size;
407 size_t offset;
408 DNS_ERROR error;
409};
410
411/* from dnsutils.c */
412
413DNS_ERROR dns_domain_name_from_string( TALLOC_CTX *mem_ctx,
414 const char *pszDomainName,
415 struct dns_domain_name **presult );
416char *dns_generate_keyname( TALLOC_CTX *mem_ctx );
417
418/* from dnsrecord.c */
419
420DNS_ERROR dns_create_query( TALLOC_CTX *mem_ctx, const char *name,
421 uint16 q_type, uint16 q_class,
422 struct dns_request **preq );
423DNS_ERROR dns_create_update( TALLOC_CTX *mem_ctx, const char *name,
424 struct dns_update_request **preq );
425DNS_ERROR dns_create_probe(TALLOC_CTX *mem_ctx, const char *zone,
426 const char *host, int num_ips,
427 const struct sockaddr_storage *sslist,
428 struct dns_update_request **preq);
429DNS_ERROR dns_create_rrec(TALLOC_CTX *mem_ctx, const char *name,
430 uint16 type, uint16 r_class, uint32 ttl,
431 uint16 data_length, uint8 *data,
432 struct dns_rrec **prec);
433DNS_ERROR dns_add_rrec(TALLOC_CTX *mem_ctx, struct dns_rrec *rec,
434 uint16 *num_records, struct dns_rrec ***records);
435DNS_ERROR dns_create_tkey_record(TALLOC_CTX *mem_ctx, const char *keyname,
436 const char *algorithm_name, time_t inception,
437 time_t expiration, uint16 mode, uint16 error,
438 uint16 key_length, const uint8 *key,
439 struct dns_rrec **prec);
440DNS_ERROR dns_create_name_in_use_record(TALLOC_CTX *mem_ctx,
441 const char *name,
442 const struct sockaddr_storage *ip,
443 struct dns_rrec **prec);
444DNS_ERROR dns_create_delete_record(TALLOC_CTX *mem_ctx, const char *name,
445 uint16 type, uint16 r_class,
446 struct dns_rrec **prec);
447DNS_ERROR dns_create_name_not_in_use_record(TALLOC_CTX *mem_ctx,
448 const char *name, uint32 type,
449 struct dns_rrec **prec);
450DNS_ERROR dns_create_a_record(TALLOC_CTX *mem_ctx, const char *host,
451 uint32 ttl, const struct sockaddr_storage *pss,
452 struct dns_rrec **prec);
453DNS_ERROR dns_unmarshall_tkey_record(TALLOC_CTX *mem_ctx, struct dns_rrec *rec,
454 struct dns_tkey_record **ptkey);
455DNS_ERROR dns_create_tsig_record(TALLOC_CTX *mem_ctx, const char *keyname,
456 const char *algorithm_name,
457 time_t time_signed, uint16 fudge,
458 uint16 mac_length, const uint8 *mac,
459 uint16 original_id, uint16 error,
460 struct dns_rrec **prec);
461DNS_ERROR dns_add_rrec(TALLOC_CTX *mem_ctx, struct dns_rrec *rec,
462 uint16 *num_records, struct dns_rrec ***records);
463DNS_ERROR dns_create_update_request(TALLOC_CTX *mem_ctx,
464 const char *domainname,
465 const char *hostname,
466 const struct sockaddr_storage *ip_addr,
467 size_t num_adds,
468 struct dns_update_request **preq);
469
470/* from dnssock.c */
471
472DNS_ERROR dns_open_connection( const char *nameserver, int32 dwType,
473 TALLOC_CTX *mem_ctx,
474 struct dns_connection **conn );
475DNS_ERROR dns_send(struct dns_connection *conn, const struct dns_buffer *buf);
476DNS_ERROR dns_receive(TALLOC_CTX *mem_ctx, struct dns_connection *conn,
477 struct dns_buffer **presult);
478DNS_ERROR dns_transaction(TALLOC_CTX *mem_ctx, struct dns_connection *conn,
479 const struct dns_request *req,
480 struct dns_request **resp);
481DNS_ERROR dns_update_transaction(TALLOC_CTX *mem_ctx,
482 struct dns_connection *conn,
483 struct dns_update_request *up_req,
484 struct dns_update_request **up_resp);
485
486/* from dnsmarshall.c */
487
488struct dns_buffer *dns_create_buffer(TALLOC_CTX *mem_ctx);
489void dns_marshall_buffer(struct dns_buffer *buf, const uint8 *data,
490 size_t len);
491void dns_marshall_uint16(struct dns_buffer *buf, uint16 val);
492void dns_marshall_uint32(struct dns_buffer *buf, uint32 val);
493void dns_unmarshall_buffer(struct dns_buffer *buf, uint8 *data,
494 size_t len);
495void dns_unmarshall_uint16(struct dns_buffer *buf, uint16 *val);
496void dns_unmarshall_uint32(struct dns_buffer *buf, uint32 *val);
497void dns_unmarshall_domain_name(TALLOC_CTX *mem_ctx,
498 struct dns_buffer *buf,
499 struct dns_domain_name **pname);
500void dns_marshall_domain_name(struct dns_buffer *buf,
501 const struct dns_domain_name *name);
502void dns_unmarshall_domain_name(TALLOC_CTX *mem_ctx,
503 struct dns_buffer *buf,
504 struct dns_domain_name **pname);
505DNS_ERROR dns_marshall_request(TALLOC_CTX *mem_ctx,
506 const struct dns_request *req,
507 struct dns_buffer **pbuf);
508DNS_ERROR dns_unmarshall_request(TALLOC_CTX *mem_ctx,
509 struct dns_buffer *buf,
510 struct dns_request **preq);
511DNS_ERROR dns_marshall_update_request(TALLOC_CTX *mem_ctx,
512 struct dns_update_request *update,
513 struct dns_buffer **pbuf);
514DNS_ERROR dns_unmarshall_update_request(TALLOC_CTX *mem_ctx,
515 struct dns_buffer *buf,
516 struct dns_update_request **pupreq);
517struct dns_request *dns_update2request(struct dns_update_request *update);
518struct dns_update_request *dns_request2update(struct dns_request *request);
519uint16 dns_response_code(uint16 flags);
520
521/* from dnsgss.c */
522
523#ifdef HAVE_GSSAPI_SUPPORT
524
525void display_status( const char *msg, OM_uint32 maj_stat, OM_uint32 min_stat );
526DNS_ERROR dns_negotiate_sec_ctx( const char *target_realm,
527 const char *servername,
528 const char *keyname,
529 gss_ctx_id_t *gss_ctx,
530 enum dns_ServerType srv_type );
531DNS_ERROR dns_sign_update(struct dns_update_request *req,
532 gss_ctx_id_t gss_ctx,
533 const char *keyname,
534 const char *algorithmname,
535 time_t time_signed, uint16 fudge);
536
537#endif /* HAVE_GSSAPI_SUPPORT */
538
539#endif /* _DNS_H */
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