view.c 24.2 KB
Newer Older
Bob Halley's avatar
add  
Bob Halley committed
1
/*
Bob Halley's avatar
Bob Halley committed
2
 * Copyright (C) 1999, 2000  Internet Software Consortium.
Bob Halley's avatar
add  
Bob Halley committed
3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26
 * 
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
 * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
 * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
 * SOFTWARE.
 */

#include <config.h>

#include <string.h>

#include <isc/types.h>
#include <isc/result.h>
#include <isc/mem.h>
#include <isc/assertions.h>
#include <isc/error.h>
Michael Graff's avatar
Michael Graff committed
27
#include <isc/util.h>
Bob Halley's avatar
add  
Bob Halley committed
28 29

#include <dns/types.h>
30
#include <dns/acl.h>
Bob Halley's avatar
add adb  
Bob Halley committed
31
#include <dns/adb.h>
32
#include <dns/cache.h>
Bob Halley's avatar
add  
Bob Halley committed
33
#include <dns/dbtable.h>
Bob Halley's avatar
Bob Halley committed
34
#include <dns/db.h>
35
#include <dns/events.h>
Bob Halley's avatar
Bob Halley committed
36
#include <dns/fixedname.h>
37
#include <dns/keytable.h>
38
#include <dns/peer.h>
Bob Halley's avatar
Bob Halley committed
39
#include <dns/rbt.h>
Bob Halley's avatar
Bob Halley committed
40
#include <dns/rdataset.h>
Bob Halley's avatar
add  
Bob Halley committed
41
#include <dns/resolver.h>
Mark Andrews's avatar
Mark Andrews committed
42
#include <dns/request.h>
Brian Wellington's avatar
Brian Wellington committed
43
#include <dns/tsig.h>
Bob Halley's avatar
add  
Bob Halley committed
44
#include <dns/view.h>
45
#include <dns/zone.h>
46
#include <dns/zt.h>
Bob Halley's avatar
add  
Bob Halley committed
47

48 49
#define RESSHUTDOWN(v)	(((v)->attributes & DNS_VIEWATTR_RESSHUTDOWN) != 0)
#define ADBSHUTDOWN(v)	(((v)->attributes & DNS_VIEWATTR_ADBSHUTDOWN) != 0)
Mark Andrews's avatar
Mark Andrews committed
50
#define REQSHUTDOWN(v)	(((v)->attributes & DNS_VIEWATTR_REQSHUTDOWN) != 0)
51 52 53

static void resolver_shutdown(isc_task_t *task, isc_event_t *event);
static void adb_shutdown(isc_task_t *task, isc_event_t *event);
Mark Andrews's avatar
Mark Andrews committed
54
static void req_shutdown(isc_task_t *task, isc_event_t *event);
55

Bob Halley's avatar
add  
Bob Halley committed
56
isc_result_t
57 58
dns_view_create(isc_mem_t *mctx, dns_rdataclass_t rdclass,
		const char *name, dns_view_t **viewp)
Bob Halley's avatar
add  
Bob Halley committed
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
{
	dns_view_t *view;
	isc_result_t result;

	/*
	 * Create a view.
	 */

	REQUIRE(name != NULL);
	REQUIRE(viewp != NULL && *viewp == NULL);

	view = isc_mem_get(mctx, sizeof *view);
	if (view == NULL)
		return (ISC_R_NOMEMORY);
	view->name = isc_mem_strdup(mctx, name);
	if (view->name == NULL) {
		result = ISC_R_NOMEMORY;
		goto cleanup_view;
	}
	result = isc_mutex_init(&view->lock);
	if (result != ISC_R_SUCCESS) {
		UNEXPECTED_ERROR(__FILE__, __LINE__,
				 "isc_mutex_init() failed: %s",
				 isc_result_totext(result));
		result = ISC_R_UNEXPECTED;
		goto cleanup_name;
	}
86
	result = isc_rwlock_init(&view->conflock, 1, 1);
87 88 89 90 91 92 93
	if (result != ISC_R_SUCCESS) {
		UNEXPECTED_ERROR(__FILE__, __LINE__,
				 "isc_rwlock_init() failed: %s",
				 isc_result_totext(result));
		result = ISC_R_UNEXPECTED;
		goto cleanup_mutex;
	}
94 95
	view->zonetable = NULL;
	result = dns_zt_create(mctx, rdclass, &view->zonetable);
Bob Halley's avatar
add  
Bob Halley committed
96 97
	if (result != ISC_R_SUCCESS) {
		UNEXPECTED_ERROR(__FILE__, __LINE__,
98
				 "dns_zt_create() failed: %s",
Bob Halley's avatar
add  
Bob Halley committed
99 100
				 isc_result_totext(result));
		result = ISC_R_UNEXPECTED;
101
		goto cleanup_rwlock;
Bob Halley's avatar
add  
Bob Halley committed
102
	}
Bob Halley's avatar
Bob Halley committed
103
	view->secroots = NULL;
104
	result = dns_keytable_create(mctx, &view->secroots);
Bob Halley's avatar
Bob Halley committed
105 106
	if (result != ISC_R_SUCCESS) {
		UNEXPECTED_ERROR(__FILE__, __LINE__,
107
				 "dns_keytable_create() failed: %s",
Bob Halley's avatar
Bob Halley committed
108 109
				 isc_result_totext(result));
		result = ISC_R_UNEXPECTED;
110
		goto cleanup_zt;
Bob Halley's avatar
Bob Halley committed
111
	}
112 113 114 115 116 117 118 119 120
	view->trustedkeys = NULL;
	result = dns_keytable_create(mctx, &view->trustedkeys);
	if (result != ISC_R_SUCCESS) {
		UNEXPECTED_ERROR(__FILE__, __LINE__,
				 "dns_keytable_create() failed: %s",
				 isc_result_totext(result));
		result = ISC_R_UNEXPECTED;
		goto cleanup_secroots;
	}
121

122
	view->cache = NULL;
Bob Halley's avatar
Bob Halley committed
123
	view->cachedb = NULL;
Bob Halley's avatar
Bob Halley committed
124
	view->hints = NULL;
Bob Halley's avatar
add  
Bob Halley committed
125
	view->resolver = NULL;
Bob Halley's avatar
add adb  
Bob Halley committed
126
	view->adb = NULL;
Mark Andrews's avatar
Mark Andrews committed
127
	view->requestmgr = NULL;
Bob Halley's avatar
add  
Bob Halley committed
128 129
	view->mctx = mctx;
	view->rdclass = rdclass;
Bob Halley's avatar
Bob Halley committed
130
	view->frozen = ISC_FALSE;
131
	view->task = NULL;
Bob Halley's avatar
add  
Bob Halley committed
132
	view->references = 1;
Mark Andrews's avatar
Mark Andrews committed
133 134
	view->attributes = (DNS_VIEWATTR_RESSHUTDOWN|DNS_VIEWATTR_ADBSHUTDOWN|
			    DNS_VIEWATTR_REQSHUTDOWN);
Brian Wellington's avatar
Brian Wellington committed
135 136
	view->statickeys = NULL;
	view->dynamickeys = NULL;
137
	view->matchclients = NULL;
138
	result = dns_tsigkeyring_create(view->mctx, &view->dynamickeys);
139
	if (result != ISC_R_SUCCESS)
140
		goto cleanup_trustedkeys;
141
	view->peers = NULL;
142 143 144 145 146

	/* Initialize configuration data with default values. */	
	view->recursion = ISC_TRUE;
	view->auth_nxdomain = ISC_FALSE; /* Was true in BIND 8 */
	view->transfer_format = dns_one_answer;
147 148
	view->queryacl = NULL;
	view->recursionacl = NULL;
149 150
	view->requestixfr = ISC_TRUE;
	view->provideixfr = ISC_TRUE;
151

152
	result = dns_peerlist_new(view->mctx, &view->peers);
153
	if (result != ISC_R_SUCCESS)
154
		goto cleanup_dynkeys;
Michael Graff's avatar
Michael Graff committed
155
	ISC_LINK_INIT(view, link);
156 157 158 159 160 161
	ISC_EVENT_INIT(&view->resevent, sizeof view->resevent, 0, NULL,
		       DNS_EVENT_VIEWRESSHUTDOWN, resolver_shutdown,
		       view, NULL, NULL, NULL);
	ISC_EVENT_INIT(&view->adbevent, sizeof view->adbevent, 0, NULL,
		       DNS_EVENT_VIEWADBSHUTDOWN, adb_shutdown,
		       view, NULL, NULL, NULL);
Mark Andrews's avatar
Mark Andrews committed
162 163 164
	ISC_EVENT_INIT(&view->reqevent, sizeof view->reqevent, 0, NULL,
		       DNS_EVENT_VIEWREQSHUTDOWN, req_shutdown,
		       view, NULL, NULL, NULL);
Bob Halley's avatar
add  
Bob Halley committed
165 166 167 168 169 170
	view->magic = DNS_VIEW_MAGIC;
	
	*viewp = view;

	return (ISC_R_SUCCESS);

171 172 173
 cleanup_dynkeys:
	dns_tsigkeyring_destroy(&view->dynamickeys);	

174 175 176
 cleanup_trustedkeys:
	dns_keytable_detach(&view->trustedkeys);

177
 cleanup_secroots:
178
	dns_keytable_detach(&view->secroots);
179
	
180 181
 cleanup_zt:
	dns_zt_detach(&view->zonetable);
Bob Halley's avatar
Bob Halley committed
182

183 184 185
 cleanup_rwlock:
	isc_rwlock_destroy(&view->conflock);

Bob Halley's avatar
add  
Bob Halley committed
186 187 188 189 190 191 192 193 194 195 196 197 198 199
 cleanup_mutex:
	isc_mutex_destroy(&view->lock);

 cleanup_name:
	isc_mem_free(mctx, view->name);

 cleanup_view:
	isc_mem_put(mctx, view, sizeof *view);

	return (result);
}

void
dns_view_attach(dns_view_t *source, dns_view_t **targetp) {
Bob Halley's avatar
Bob Halley committed
200 201 202 203 204

	/*
	 * Attach '*targetp' to 'source'.
	 */

Bob Halley's avatar
add  
Bob Halley committed
205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221
	REQUIRE(DNS_VIEW_VALID(source));
	REQUIRE(targetp != NULL && *targetp == NULL);

	LOCK(&source->lock);

	INSIST(source->references > 0);
	source->references++;
	INSIST(source->references != 0);

	UNLOCK(&source->lock);

	*targetp = source;
}

static inline void
destroy(dns_view_t *view) {
	REQUIRE(!ISC_LINK_LINKED(view, link));
222 223 224
	REQUIRE(view->references == 0);
	REQUIRE(RESSHUTDOWN(view));
	REQUIRE(ADBSHUTDOWN(view));
Mark Andrews's avatar
Mark Andrews committed
225
	REQUIRE(REQSHUTDOWN(view));
Bob Halley's avatar
add  
Bob Halley committed
226

227 228
	if (view->peers != NULL)
		dns_peerlist_detach(&view->peers);
229
	if (view->dynamickeys != NULL)	
230
		dns_tsigkeyring_destroy(&view->dynamickeys);
231
	if (view->statickeys != NULL)	
232
		dns_tsigkeyring_destroy(&view->statickeys);
Bob Halley's avatar
add adb  
Bob Halley committed
233 234
	if (view->adb != NULL)
		dns_adb_detach(&view->adb);
Bob Halley's avatar
add  
Bob Halley committed
235 236
	if (view->resolver != NULL)
		dns_resolver_detach(&view->resolver);
Mark Andrews's avatar
Mark Andrews committed
237 238
	if (view->requestmgr != NULL)
		dns_requestmgr_detach(&view->requestmgr);
239 240
	if (view->task != NULL)
		isc_task_detach(&view->task);
Bob Halley's avatar
Bob Halley committed
241 242
	if (view->hints != NULL)
		dns_db_detach(&view->hints);
Bob Halley's avatar
Bob Halley committed
243 244
	if (view->cachedb != NULL)
		dns_db_detach(&view->cachedb);
245 246
	if (view->cache != NULL)
		dns_cache_detach(&view->cache);
247 248
	if (view->matchclients != NULL)
		dns_acl_detach(&view->matchclients);
249 250 251 252
	if (view->queryacl != NULL)
		dns_acl_detach(&view->queryacl);
	if (view->recursionacl != NULL)
		dns_acl_detach(&view->recursionacl);
253
	dns_zt_detach(&view->zonetable);
254 255
	dns_keytable_detach(&view->trustedkeys);
	dns_keytable_detach(&view->secroots);
Bob Halley's avatar
add  
Bob Halley committed
256 257 258 259 260
	isc_mutex_destroy(&view->lock);
	isc_mem_free(view->mctx, view->name);
	isc_mem_put(view->mctx, view, sizeof *view);
}

261 262 263 264 265 266
static isc_boolean_t
all_done(dns_view_t *view) {
	/*
	 * Caller must be holding the view lock.
	 */

Mark Andrews's avatar
Mark Andrews committed
267 268
	if (view->references == 0 && RESSHUTDOWN(view) &&
	    ADBSHUTDOWN(view) && REQSHUTDOWN(view))
269 270 271 272 273
		return (ISC_TRUE);

	return (ISC_FALSE);
}

Bob Halley's avatar
add  
Bob Halley committed
274 275 276
void
dns_view_detach(dns_view_t **viewp) {
	dns_view_t *view;
277
	isc_boolean_t done = ISC_FALSE;
Bob Halley's avatar
add  
Bob Halley committed
278

Bob Halley's avatar
Bob Halley committed
279 280 281 282
	/*
	 * Detach '*viewp' from its view.
	 */

Bob Halley's avatar
add  
Bob Halley committed
283 284 285 286 287 288 289 290
	REQUIRE(viewp != NULL);
	view = *viewp;
	REQUIRE(DNS_VIEW_VALID(view));

	LOCK(&view->lock);

	INSIST(view->references > 0);
	view->references--;
291 292 293 294 295
	if (view->references == 0) {
		if (!RESSHUTDOWN(view))
			dns_resolver_shutdown(view->resolver);
		if (!ADBSHUTDOWN(view))
			dns_adb_shutdown(view->adb);
Mark Andrews's avatar
Mark Andrews committed
296 297
		if (!REQSHUTDOWN(view))
			dns_requestmgr_shutdown(view->requestmgr);
298 299
		done = all_done(view);
	}
Bob Halley's avatar
add  
Bob Halley committed
300 301 302 303
	UNLOCK(&view->lock);

	*viewp = NULL;

304 305 306 307 308 309
	if (done)
		destroy(view);
}

static void
resolver_shutdown(isc_task_t *task, isc_event_t *event) {
310
	dns_view_t *view = event->ev_arg;
311 312
	isc_boolean_t done;
	
313
	REQUIRE(event->ev_type == DNS_EVENT_VIEWRESSHUTDOWN);
314 315 316
	REQUIRE(DNS_VIEW_VALID(view));
	REQUIRE(view->task == task);

317 318
	UNUSED(task);
	
319 320 321 322 323 324 325 326 327 328 329 330 331 332 333
	LOCK(&view->lock);

	view->attributes |= DNS_VIEWATTR_RESSHUTDOWN;
	done = all_done(view);

	UNLOCK(&view->lock);

	isc_event_free(&event);

	if (done)
		destroy(view);
}

static void
adb_shutdown(isc_task_t *task, isc_event_t *event) {
334
	dns_view_t *view = event->ev_arg;
335 336
	isc_boolean_t done;
	
337
	REQUIRE(event->ev_type == DNS_EVENT_VIEWADBSHUTDOWN);
338 339 340
	REQUIRE(DNS_VIEW_VALID(view));
	REQUIRE(view->task == task);

341 342
	UNUSED(task);
	
343 344 345 346 347 348 349 350 351 352
	LOCK(&view->lock);

	view->attributes |= DNS_VIEWATTR_ADBSHUTDOWN;
	done = all_done(view);

	UNLOCK(&view->lock);

	isc_event_free(&event);

	if (done)
Bob Halley's avatar
add  
Bob Halley committed
353 354
		destroy(view);
}
355

Mark Andrews's avatar
Mark Andrews committed
356 357 358 359 360 361 362 363 364
static void
req_shutdown(isc_task_t *task, isc_event_t *event) {
	dns_view_t *view = event->ev_arg;
	isc_boolean_t done;
	
	REQUIRE(event->ev_type == DNS_EVENT_VIEWREQSHUTDOWN);
	REQUIRE(DNS_VIEW_VALID(view));
	REQUIRE(view->task == task);

365 366
	UNUSED(task);
	
Mark Andrews's avatar
Mark Andrews committed
367 368 369 370 371 372 373 374 375 376 377 378 379
	LOCK(&view->lock);

	view->attributes |= DNS_VIEWATTR_REQSHUTDOWN;
	done = all_done(view);

	UNLOCK(&view->lock);

	isc_event_free(&event);

	if (done)
		destroy(view);
}

Bob Halley's avatar
Bob Halley committed
380
isc_result_t
Bob Halley's avatar
Bob Halley committed
381 382 383 384
dns_view_createresolver(dns_view_t *view,
			isc_taskmgr_t *taskmgr, unsigned int ntasks,
			isc_socketmgr_t *socketmgr,
			isc_timermgr_t *timermgr,
385 386 387
			unsigned int options,
			dns_dispatch_t *dispatchv4,
			dns_dispatch_t *dispatchv6)
Bob Halley's avatar
Bob Halley committed
388
{
Bob Halley's avatar
add adb  
Bob Halley committed
389
	isc_result_t result;
390
	isc_event_t *event;
Bob Halley's avatar
add adb  
Bob Halley committed
391

Bob Halley's avatar
Bob Halley committed
392
	/*
Bob Halley's avatar
add adb  
Bob Halley committed
393
	 * Create a resolver and address database for the view.
Bob Halley's avatar
Bob Halley committed
394 395
	 */

396
	REQUIRE(DNS_VIEW_VALID(view));
Bob Halley's avatar
Bob Halley committed
397
	REQUIRE(!view->frozen);
398
	REQUIRE(view->resolver == NULL);
399

Bob Halley's avatar
Bob Halley committed
400
	result = isc_task_create(taskmgr, 0, &view->task);
401 402
	if (result != ISC_R_SUCCESS)
		return (result);
Bob Halley's avatar
Bob Halley committed
403
	isc_task_setname(view->task, "view", view);
404

Bob Halley's avatar
add adb  
Bob Halley committed
405
	result = dns_resolver_create(view, taskmgr, ntasks, socketmgr,
406 407
				     timermgr, options, dispatchv4, dispatchv6,
				     &view->resolver);
408 409
	if (result != ISC_R_SUCCESS) {
		isc_task_detach(&view->task);
Bob Halley's avatar
add adb  
Bob Halley committed
410
		return (result);
411 412 413 414 415
	}
	event = &view->resevent;
	dns_resolver_whenshutdown(view->resolver, view->task, &event);
	view->attributes &= ~DNS_VIEWATTR_RESSHUTDOWN;

Bob Halley's avatar
add adb  
Bob Halley committed
416 417
	result = dns_adb_create(view->mctx, view, timermgr, taskmgr,
				&view->adb);
418 419 420 421 422 423 424
	if (result != ISC_R_SUCCESS) {
		dns_resolver_shutdown(view->resolver);
		return (result);
	}
	event = &view->adbevent;
	dns_adb_whenshutdown(view->adb, view->task, &event);
	view->attributes &= ~DNS_VIEWATTR_ADBSHUTDOWN;
Bob Halley's avatar
add adb  
Bob Halley committed
425

Mark Andrews's avatar
Mark Andrews committed
426 427 428 429 430 431 432 433 434 435 436 437 438
	result = dns_requestmgr_create(view->mctx, timermgr, socketmgr,
				       dns_resolver_dispatchv4(view->resolver),
				       dns_resolver_dispatchv6(view->resolver),
				       &view->requestmgr);
	if (result != ISC_R_SUCCESS) {
		dns_adb_shutdown(view->adb);
		dns_resolver_shutdown(view->resolver);
		return (result);
	}
	event = &view->reqevent;
	dns_requestmgr_whenshutdown(view->requestmgr, view->task, &event);
	view->attributes &= ~DNS_VIEWATTR_REQSHUTDOWN;

439
	return (ISC_R_SUCCESS);
440 441 442
}

void
443
dns_view_setcache(dns_view_t *view, dns_cache_t *cache) {
Bob Halley's avatar
Bob Halley committed
444 445

	/*
446
	 * Set the view's cache.
Bob Halley's avatar
Bob Halley committed
447 448
	 */

449
	REQUIRE(DNS_VIEW_VALID(view));
Bob Halley's avatar
Bob Halley committed
450
	REQUIRE(!view->frozen);
451

452
	if (view->cache != NULL) {
Bob Halley's avatar
add adb  
Bob Halley committed
453
		dns_db_detach(&view->cachedb);
454 455 456 457 458
		dns_cache_detach(&view->cache);
	}
	dns_cache_attach(cache, &view->cache);
	dns_cache_attachdb(cache, &view->cachedb);
	INSIST(DNS_DB_VALID(view->cachedb));
459 460
}

Bob Halley's avatar
Bob Halley committed
461 462 463 464 465 466 467 468 469 470 471 472 473 474 475
void
dns_view_sethints(dns_view_t *view, dns_db_t *hints) {

	/*
	 * Set the view's hints database.
	 */

	REQUIRE(DNS_VIEW_VALID(view));
	REQUIRE(!view->frozen);
	REQUIRE(view->hints == NULL);
	REQUIRE(dns_db_iszone(hints));

	dns_db_attach(hints, &view->hints);
}

Brian Wellington's avatar
Brian Wellington committed
476 477 478
void
dns_view_setkeyring(dns_view_t *view, dns_tsig_keyring_t *ring) {
	/*
479
	 * Set the view's static TSIG keyring.
Brian Wellington's avatar
Brian Wellington committed
480 481 482
	 */
	REQUIRE(DNS_VIEW_VALID(view));
	REQUIRE(ring != NULL);
483
	if (view->statickeys != NULL)
484
		dns_tsigkeyring_destroy(&view->statickeys);
Brian Wellington's avatar
Brian Wellington committed
485 486 487
	view->statickeys = ring;
}

488
isc_result_t
489
dns_view_addzone(dns_view_t *view, dns_zone_t *zone) {
Bob Halley's avatar
Bob Halley committed
490 491 492
	isc_result_t result;

	/*
493
	 * Add zone 'zone' to 'view'.
Bob Halley's avatar
Bob Halley committed
494 495
	 */

496
	REQUIRE(DNS_VIEW_VALID(view));
Bob Halley's avatar
Bob Halley committed
497 498
	REQUIRE(!view->frozen);

499
	result = dns_zt_mount(view->zonetable, zone);
500
	dns_zone_setview(zone, view);
501

Bob Halley's avatar
Bob Halley committed
502
	return (result);
503 504
}

Mark Andrews's avatar
Mark Andrews committed
505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522
static isc_result_t
set_resolver(dns_zone_t *zone, void *ptr) {
	dns_zone_setresolver(zone, ptr);
	return (ISC_R_SUCCESS);
}

static isc_result_t
set_requestmgr(dns_zone_t *zone, void *ptr) {
	dns_zone_setrequestmgr(zone, ptr);
	return (ISC_R_SUCCESS);
}

static isc_result_t
set_adb(dns_zone_t *zone, void *ptr) {
	dns_zone_setadb(zone, ptr);
	return (ISC_R_SUCCESS);
}

523 524
void
dns_view_freeze(dns_view_t *view) {
Bob Halley's avatar
Bob Halley committed
525 526 527 528 529 530 531 532
	
	/*
	 * Freeze view.
	 */

	REQUIRE(DNS_VIEW_VALID(view));
	REQUIRE(!view->frozen);

533 534
	if (view->resolver != NULL) {
		INSIST(view->cachedb != NULL);
Bob Halley's avatar
Bob Halley committed
535
		dns_resolver_freeze(view->resolver);
Mark Andrews's avatar
Mark Andrews committed
536 537 538 539 540 541 542 543 544 545
		(void)dns_zt_apply(view->zonetable, ISC_FALSE,
				   set_resolver, view->resolver);
	}
	if (view->requestmgr != NULL) {
		(void)dns_zt_apply(view->zonetable, ISC_FALSE,
				   set_requestmgr, view->requestmgr);
	}
	if (view->adb != NULL) {
		(void)dns_zt_apply(view->zonetable, ISC_FALSE,
				   set_adb, view->adb);
546
	}
Bob Halley's avatar
Bob Halley committed
547 548 549
	view->frozen = ISC_TRUE;
}

550
isc_result_t
551
dns_view_findzone(dns_view_t *view, dns_name_t *name, dns_zone_t **zonep) {
552 553 554 555
	isc_result_t result;

	REQUIRE(DNS_VIEW_VALID(view));

Bob Halley's avatar
Bob Halley committed
556
	result = dns_zt_find(view->zonetable, name, 0, NULL, zonep);
557
	if (result == DNS_R_PARTIALMATCH) {
558
		dns_zone_detach(zonep);
559
		result = ISC_R_NOTFOUND;
560
	}
561

562 563 564
	return (result);
}

Bob Halley's avatar
Bob Halley committed
565 566
isc_result_t
dns_view_find(dns_view_t *view, dns_name_t *name, dns_rdatatype_t type,
567 568
	      isc_stdtime_t now, unsigned int options,
	      isc_boolean_t use_hints, dns_name_t *foundname,
Bob Halley's avatar
Bob Halley committed
569 570 571 572 573 574 575
	      dns_rdataset_t *rdataset, dns_rdataset_t *sigrdataset)
{
	isc_result_t result;
	dns_db_t *db;
	dns_dbversion_t *version;
	isc_boolean_t is_zone;
	dns_rdataset_t zrdataset, zsigrdataset;
576
	dns_zone_t *zone;
Bob Halley's avatar
Bob Halley committed
577 578 579 580 581 582

	/*
	 * Find an rdataset whose owner name is 'name', and whose type is
	 * 'type'.
	 */

583
	REQUIRE(DNS_VIEW_VALID(view));
Bob Halley's avatar
Bob Halley committed
584 585 586 587 588 589 590 591 592 593 594 595
	REQUIRE(view->frozen);
	REQUIRE(type != dns_rdatatype_any && type != dns_rdatatype_sig);

	/*
	 * Initialize.
	 */
	dns_rdataset_init(&zrdataset);
	dns_rdataset_init(&zsigrdataset);

	/*
	 * Find a database to answer the query.
	 */
596
	zone = NULL;
Bob Halley's avatar
Bob Halley committed
597
	db = NULL;
Bob Halley's avatar
Bob Halley committed
598
	result = dns_zt_find(view->zonetable, name, 0, NULL, &zone);
599 600
	if (result == ISC_R_SUCCESS || result == DNS_R_PARTIALMATCH) {
		result = dns_zone_getdb(zone, &db);
601
		if (result != ISC_R_SUCCESS && view->cachedb != NULL)
602
			dns_db_attach(view->cachedb, &db);
603
		else if (result != ISC_R_SUCCESS)
604 605
			goto cleanup;
	} else if (result == ISC_R_NOTFOUND && view->cachedb != NULL)
Bob Halley's avatar
Bob Halley committed
606
		dns_db_attach(view->cachedb, &db);
607
	else
Bob Halley's avatar
Bob Halley committed
608 609 610
		goto cleanup;

	is_zone = dns_db_iszone(db);
611

Bob Halley's avatar
Bob Halley committed
612 613 614 615 616
 db_find:
	/*
	 * Now look for an answer in the database.
	 */
	result = dns_db_find(db, name, NULL, type, options,
617
			     now, NULL, foundname, rdataset, sigrdataset);
Bob Halley's avatar
Bob Halley committed
618 619

	if (result == DNS_R_DELEGATION ||
620
	    result == ISC_R_NOTFOUND) {
621
		if (dns_rdataset_isassociated(rdataset))
Bob Halley's avatar
Bob Halley committed
622
			dns_rdataset_disassociate(rdataset);
623 624
		if (sigrdataset != NULL &&
		    dns_rdataset_isassociated(sigrdataset))
Bob Halley's avatar
Bob Halley committed
625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642
			dns_rdataset_disassociate(sigrdataset);
		if (is_zone) {
			if (view->cachedb != NULL) {
				/*
				 * Either the answer is in the cache, or we
				 * don't know it.
				 */
				is_zone = ISC_FALSE;
				version = NULL;
				dns_db_detach(&db);
				dns_db_attach(view->cachedb, &db);
				goto db_find;
			}
		} else {
			/*
			 * We don't have the data in the cache.  If we've got
			 * glue from the zone, use it.
			 */
643
			if (dns_rdataset_isassociated(&zrdataset)) {
Bob Halley's avatar
Bob Halley committed
644
				dns_rdataset_clone(&zrdataset, rdataset);
Bob Halley's avatar
Bob Halley committed
645
				if (sigrdataset != NULL &&
646
				    dns_rdataset_isassociated(&zsigrdataset))
Bob Halley's avatar
Bob Halley committed
647 648 649 650 651 652 653 654 655
					dns_rdataset_clone(&zsigrdataset,
							   sigrdataset);
				result = DNS_R_GLUE;
				goto cleanup;
			}
		}
		/*
		 * We don't know the answer.
		 */
656
		result = ISC_R_NOTFOUND;
Bob Halley's avatar
Bob Halley committed
657 658 659 660 661 662 663 664 665 666
	} else if (result == DNS_R_GLUE) {
		if (view->cachedb != NULL) {
			/*
			 * We found an answer, but the cache may be better.
			 * Remember what we've got and go look in the cache.
			 */
			is_zone = ISC_FALSE;
			version = NULL;
			dns_rdataset_clone(rdataset, &zrdataset);
			dns_rdataset_disassociate(rdataset);
Bob Halley's avatar
Bob Halley committed
667
			if (sigrdataset != NULL &&
668
			    dns_rdataset_isassociated(sigrdataset)) {
Bob Halley's avatar
Bob Halley committed
669 670 671 672 673 674 675 676 677 678 679
				dns_rdataset_clone(sigrdataset, &zsigrdataset);
				dns_rdataset_disassociate(sigrdataset);
			}
			dns_db_detach(&db);
			dns_db_attach(view->cachedb, &db);
			goto db_find;
		}
		/*
		 * Otherwise, the glue is the best answer.
		 */
		result = ISC_R_SUCCESS;
Bob Halley's avatar
Bob Halley committed
680 681
	}

682
	if (result == ISC_R_NOTFOUND && use_hints && view->hints != NULL) {
683
		if (dns_rdataset_isassociated(rdataset))
Bob Halley's avatar
Bob Halley committed
684
			dns_rdataset_disassociate(rdataset);
685 686
		if (sigrdataset != NULL &&
		    dns_rdataset_isassociated(sigrdataset))
Bob Halley's avatar
Bob Halley committed
687 688
			dns_rdataset_disassociate(sigrdataset);
		result = dns_db_find(view->hints, name, NULL, type, options,
689
				     now, NULL, foundname,
Bob Halley's avatar
Bob Halley committed
690
				     rdataset, sigrdataset);
Bob Halley's avatar
Bob Halley committed
691 692 693 694 695 696
		if (result == ISC_R_SUCCESS || result == DNS_R_GLUE) {
			/*
			 * We just used a hint.  Let the resolver know it
			 * should consider priming.
			 */
			dns_resolver_prime(view->resolver);
Bob Halley's avatar
Bob Halley committed
697
			result = DNS_R_HINT;
Bob Halley's avatar
Bob Halley committed
698
		} else if (result == DNS_R_NXDOMAIN ||
699 700
			   result == DNS_R_NXRRSET)
			result = ISC_R_NOTFOUND;
Bob Halley's avatar
Bob Halley committed
701
	}
Bob Halley's avatar
Bob Halley committed
702 703

 cleanup:
704 705 706 707
	if (result == DNS_R_NXDOMAIN || result == DNS_R_NXRRSET) {
		/*
		 * We don't care about any DNSSEC proof data in these cases.
		 */
708
		if (dns_rdataset_isassociated(rdataset))
709
			dns_rdataset_disassociate(rdataset);
710 711
		if (sigrdataset != NULL &&
		    dns_rdataset_isassociated(sigrdataset))
712 713
			dns_rdataset_disassociate(sigrdataset);
	}
Bob Halley's avatar
Bob Halley committed
714

715
	if (dns_rdataset_isassociated(&zrdataset)) {
Bob Halley's avatar
Bob Halley committed
716
		dns_rdataset_disassociate(&zrdataset);
717
		if (dns_rdataset_isassociated(&zsigrdataset))
Bob Halley's avatar
Bob Halley committed
718 719 720 721
			dns_rdataset_disassociate(&zsigrdataset);
	}
	if (db != NULL)
		dns_db_detach(&db);
722 723
	if (zone != NULL)
		dns_zone_detach(&zone);
Bob Halley's avatar
Bob Halley committed
724 725

	return (result);
726
}
727

728 729 730 731 732 733 734 735 736 737 738 739 740
isc_result_t
dns_view_simplefind(dns_view_t *view, dns_name_t *name, dns_rdatatype_t type,
		    isc_stdtime_t now, unsigned int options,
		    isc_boolean_t use_hints,
		    dns_rdataset_t *rdataset, dns_rdataset_t *sigrdataset)
{
	isc_result_t result;
	dns_fixedname_t foundname;

	dns_fixedname_init(&foundname);
	result = dns_view_find(view, name, type, now, options, use_hints,
			       dns_fixedname_name(&foundname),
			       rdataset, sigrdataset);
741 742 743 744 745 746 747
	if (result == DNS_R_NXDOMAIN) {
		/*
		 * The rdataset and sigrdataset of the relevant NXT record
		 * may be returned, but the caller cannot use them because
		 * foundname is not returned by this simplified API.  We
		 * disassociate them here to prevent any misuse by the caller.
		 */
748
		if (dns_rdataset_isassociated(rdataset))
749
			dns_rdataset_disassociate(rdataset);
750 751
		if (sigrdataset != NULL &&
		    dns_rdataset_isassociated(sigrdataset))
752 753 754 755 756 757 758
			dns_rdataset_disassociate(sigrdataset);
	} else if (result != ISC_R_SUCCESS &&
		   result != DNS_R_GLUE &&
		   result != DNS_R_HINT &&
		   result != DNS_R_NCACHENXDOMAIN &&
		   result != DNS_R_NCACHENXRRSET &&
		   result != DNS_R_NXRRSET &&
759
		   result != ISC_R_NOTFOUND) {
760
		if (dns_rdataset_isassociated(rdataset))
761
			dns_rdataset_disassociate(rdataset);
762 763
		if (sigrdataset != NULL &&
		    dns_rdataset_isassociated(sigrdataset))
764
			dns_rdataset_disassociate(sigrdataset);
765
		result = ISC_R_NOTFOUND;
766 767 768 769 770
	}

	return (result);
}

Bob Halley's avatar
Bob Halley committed
771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807
isc_result_t
dns_view_findzonecut(dns_view_t *view, dns_name_t *name, dns_name_t *fname,
		     isc_stdtime_t now, unsigned int options,
		     isc_boolean_t use_hints,
		     dns_rdataset_t *rdataset, dns_rdataset_t *sigrdataset)
{
	isc_result_t result;
	dns_db_t *db;
	isc_boolean_t is_zone, use_zone, try_hints;
	dns_zone_t *zone;
	dns_name_t *zfname;
	dns_rdataset_t zrdataset, zsigrdataset;
	dns_fixedname_t zfixedname;

	/*
	 * Find the best known zonecut containing 'name'.
	 */

	REQUIRE(DNS_VIEW_VALID(view));
	REQUIRE(view->frozen);

	db = NULL;
	zone = NULL;
	use_zone = ISC_FALSE;
	try_hints = ISC_FALSE;
	zfname = NULL;

	/*
	 * Initialize.
	 */
	dns_fixedname_init(&zfixedname);
	dns_rdataset_init(&zrdataset);
	dns_rdataset_init(&zsigrdataset);

	/*
	 * Find the right database.
	 */
Bob Halley's avatar
Bob Halley committed
808
	result = dns_zt_find(view->zonetable, name, 0, NULL, &zone);
809
	if (result == ISC_R_SUCCESS || result == DNS_R_PARTIALMATCH)
Bob Halley's avatar
Bob Halley committed
810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859
		result = dns_zone_getdb(zone, &db);
	if (result == ISC_R_NOTFOUND) {
		/*
		 * We're not directly authoritative for this query name, nor
		 * is it a subdomain of any zone for which we're
		 * authoritative.
		 */
		if (view->cachedb != NULL) {
			/*
			 * We have a cache; try it.
			 */
			dns_db_attach(view->cachedb, &db);
		} else {
			/*
			 * Maybe we have hints...
			 */
			try_hints = ISC_TRUE;
			goto finish;
		}
	} else if (result != ISC_R_SUCCESS) {
		/*
		 * Something is broken.
		 */
		goto cleanup;
	}
	is_zone = dns_db_iszone(db);

 db_find:
	/*
	 * Look for the zonecut.
	 */
	if (is_zone) {
		result = dns_db_find(db, name, NULL, dns_rdatatype_ns, options,
				     now, NULL, fname, rdataset, sigrdataset);
		if (result == DNS_R_DELEGATION)
			result = ISC_R_SUCCESS;
		else if (result != ISC_R_SUCCESS)
			goto cleanup;
		if (view->cachedb != NULL && db != view->hints) {
			/*
			 * We found an answer, but the cache may be better.
			 */
			zfname = dns_fixedname_name(&zfixedname);
			result = dns_name_concatenate(fname, NULL, zfname,
						      NULL);
			if (result != ISC_R_SUCCESS)
				goto cleanup;
			dns_rdataset_clone(rdataset, &zrdataset);
			dns_rdataset_disassociate(rdataset);
			if (sigrdataset != NULL &&
860
			    dns_rdataset_isassociated(sigrdataset)) {
Bob Halley's avatar
Bob Halley committed
861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903
				dns_rdataset_clone(sigrdataset, &zsigrdataset);
				dns_rdataset_disassociate(sigrdataset);
			}
			dns_db_detach(&db);
			dns_db_attach(view->cachedb, &db);
			is_zone = ISC_FALSE;
			goto db_find;
		}
	} else {
		result = dns_db_findzonecut(db, name, options, now, NULL,
					    fname, rdataset, sigrdataset);
		if (result == ISC_R_SUCCESS) {
			if (zfname != NULL &&
			    !dns_name_issubdomain(fname, zfname)) {
				/*
				 * We found a zonecut in the cache, but our
				 * zone delegation is better.
				 */
				use_zone = ISC_TRUE;
			}
		} else if (result == ISC_R_NOTFOUND) {
			if (zfname != NULL) {
				/*
				 * We didn't find anything in the cache, but we
				 * have a zone delegation, so use it.
				 */
				use_zone = ISC_TRUE;
			} else {
				/*
				 * Maybe we have hints...
				 */
				try_hints = ISC_TRUE;
			}
		} else {
			/*
			 * Something bad happened.
			 */
			goto cleanup;
		}
	}

 finish:
	if (use_zone) {
904
		if (dns_rdataset_isassociated(rdataset)) {
Bob Halley's avatar
Bob Halley committed
905 906
			dns_rdataset_disassociate(rdataset);
			if (sigrdataset != NULL &&
907
			    dns_rdataset_isassociated(sigrdataset))
Bob Halley's avatar
Bob Halley committed
908 909 910 911 912 913
				dns_rdataset_disassociate(sigrdataset);
		}
		result = dns_name_concatenate(zfname, NULL, fname, NULL);
		if (result != ISC_R_SUCCESS)
			goto cleanup;
		dns_rdataset_clone(&zrdataset, rdataset);
914 915
		if (sigrdataset != NULL &&
		    dns_rdataset_isassociated(&zrdataset))
Bob Halley's avatar
Bob Halley committed
916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933
			dns_rdataset_clone(&zsigrdataset, sigrdataset);
	} else if (try_hints && use_hints && view->hints != NULL) {
		/*
		 * We've found nothing so far, but we have hints.
		 */
		result = dns_db_find(view->hints, dns_rootname, NULL,
				     dns_rdatatype_ns, 0, now, NULL, fname,
				     rdataset, NULL);
		if (result != ISC_R_SUCCESS) {
			/*
			 * We can't even find the hints for the root
			 * nameservers!
			 */
			result = ISC_R_NOTFOUND;
		}
	}

 cleanup:
934
	if (dns_rdataset_isassociated(&zrdataset)) {
Bob Halley's avatar
Bob Halley committed
935
		dns_rdataset_disassociate(&zrdataset);
936
		if (dns_rdataset_isassociated(&zsigrdataset))
Bob Halley's avatar
Bob Halley committed
937 938 939 940 941 942 943 944 945 946
			dns_rdataset_disassociate(&zsigrdataset);
	}
	if (db != NULL)
		dns_db_detach(&db);
	if (zone != NULL)
		dns_zone_detach(&zone);

	return (result);
}

947 948 949 950
isc_result_t
dns_viewlist_find(dns_viewlist_t *list, const char *name,
		  dns_rdataclass_t rdclass, dns_view_t **viewp)
{
951 952 953 954
	dns_view_t *view;

	REQUIRE(list != NULL);

955 956 957
	for (view = ISC_LIST_HEAD(*list);
	     view != NULL;
	     view = ISC_LIST_NEXT(view, link)) {
958 959 960
		if (strcmp(view->name, name) == 0 && view->rdclass == rdclass)
			break;
	}
961 962 963 964 965 966
	if (view == NULL)
		return (ISC_R_NOTFOUND);

	dns_view_attach(view, viewp);

	return (ISC_R_SUCCESS);
967
}
Mark Andrews's avatar
Mark Andrews committed
968

969 970
isc_result_t
dns_view_load(dns_view_t *view, isc_boolean_t stop) {
Mark Andrews's avatar
Mark Andrews committed
971 972 973

	REQUIRE(DNS_VIEW_VALID(view));

974
	return (dns_zt_load(view->zonetable, stop));
Mark Andrews's avatar
Mark Andrews committed
975
}
Brian Wellington's avatar
Brian Wellington committed
976 977 978 979 980 981 982 983 984 985

isc_result_t
dns_view_checksig(dns_view_t *view, isc_buffer_t *source, dns_message_t *msg) {
	REQUIRE(DNS_VIEW_VALID(view));
	REQUIRE(source != NULL);

	return dns_tsig_verify(source, msg, view->statickeys,
			       view->dynamickeys);
}