view.c 27.7 KB
Newer Older
Bob Halley's avatar
add  
Bob Halley committed
1
/*
Brian Wellington's avatar
Brian Wellington committed
2
 * Copyright (C) 1999-2001  Internet Software Consortium.
3
 *
Bob Halley's avatar
add  
Bob Halley committed
4 5 6
 * 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.
7
 *
8 9 10 11 12 13 14 15
 * 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.
Bob Halley's avatar
add  
Bob Halley committed
16 17
 */

18
/* $Id: view.c,v 1.92 2001/01/12 22:22:16 bwelling Exp $ */
David Lawrence's avatar
David Lawrence committed
19

Bob Halley's avatar
add  
Bob Halley committed
20 21
#include <config.h>

22
#include <isc/task.h>
23
#include <isc/string.h>		/* Required for HP/UX (and others?) */
Michael Graff's avatar
Michael Graff committed
24
#include <isc/util.h>
Bob Halley's avatar
add  
Bob Halley committed
25

26
#include <dns/acl.h>
Bob Halley's avatar
add adb  
Bob Halley committed
27
#include <dns/adb.h>
28
#include <dns/cache.h>
Bob Halley's avatar
Bob Halley committed
29
#include <dns/db.h>
30
#include <dns/events.h>
31
#include <dns/forward.h>
32
#include <dns/keytable.h>
33
#include <dns/master.h>
34
#include <dns/masterdump.h>
35
#include <dns/peer.h>
Bob Halley's avatar
Bob Halley committed
36
#include <dns/rdataset.h>
Mark Andrews's avatar
Mark Andrews committed
37
#include <dns/request.h>
38 39
#include <dns/resolver.h>
#include <dns/result.h>
Brian Wellington's avatar
Brian Wellington committed
40
#include <dns/tsig.h>
41
#include <dns/zone.h>
42
#include <dns/zt.h>
Bob Halley's avatar
add  
Bob Halley committed
43

44 45
#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
46
#define REQSHUTDOWN(v)	(((v)->attributes & DNS_VIEWATTR_REQSHUTDOWN) != 0)
47 48 49

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
50
static void req_shutdown(isc_task_t *task, isc_event_t *event);
51

Bob Halley's avatar
add  
Bob Halley committed
52
isc_result_t
53 54
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
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
{
	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;
	}
82
	result = isc_rwlock_init(&view->conflock, 1, 1);
83 84 85 86 87 88 89
	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;
	}
90 91
	view->zonetable = NULL;
	result = dns_zt_create(mctx, rdclass, &view->zonetable);
Bob Halley's avatar
add  
Bob Halley committed
92 93
	if (result != ISC_R_SUCCESS) {
		UNEXPECTED_ERROR(__FILE__, __LINE__,
94
				 "dns_zt_create() failed: %s",
Bob Halley's avatar
add  
Bob Halley committed
95 96
				 isc_result_totext(result));
		result = ISC_R_UNEXPECTED;
97
		goto cleanup_rwlock;
Bob Halley's avatar
add  
Bob Halley committed
98
	}
Bob Halley's avatar
Bob Halley committed
99
	view->secroots = NULL;
100
	result = dns_keytable_create(mctx, &view->secroots);
Bob Halley's avatar
Bob Halley committed
101 102
	if (result != ISC_R_SUCCESS) {
		UNEXPECTED_ERROR(__FILE__, __LINE__,
103
				 "dns_keytable_create() failed: %s",
Bob Halley's avatar
Bob Halley committed
104 105
				 isc_result_totext(result));
		result = ISC_R_UNEXPECTED;
106
		goto cleanup_zt;
Bob Halley's avatar
Bob Halley committed
107
	}
108 109 110 111 112 113 114 115 116
	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;
	}
117 118 119 120 121 122 123 124 125
	view->fwdtable = NULL;
	result = dns_fwdtable_create(mctx, &view->fwdtable);
	if (result != ISC_R_SUCCESS) {
		UNEXPECTED_ERROR(__FILE__, __LINE__,
				 "dns_fwdtable_create() failed: %s",
				 isc_result_totext(result));
		result = ISC_R_UNEXPECTED;
		goto cleanup_trustedkeys;
	}
126

127
	view->cache = NULL;
Bob Halley's avatar
Bob Halley committed
128
	view->cachedb = NULL;
Bob Halley's avatar
Bob Halley committed
129
	view->hints = NULL;
Bob Halley's avatar
add  
Bob Halley committed
130
	view->resolver = NULL;
Bob Halley's avatar
add adb  
Bob Halley committed
131
	view->adb = NULL;
132
	view->loadmgr = NULL;
Mark Andrews's avatar
Mark Andrews committed
133
	view->requestmgr = NULL;
Bob Halley's avatar
add  
Bob Halley committed
134 135
	view->mctx = mctx;
	view->rdclass = rdclass;
Bob Halley's avatar
Bob Halley committed
136
	view->frozen = ISC_FALSE;
137
	view->task = NULL;
Bob Halley's avatar
add  
Bob Halley committed
138
	view->references = 1;
139
	view->weakrefs = 0;
Mark Andrews's avatar
Mark Andrews committed
140 141
	view->attributes = (DNS_VIEWATTR_RESSHUTDOWN|DNS_VIEWATTR_ADBSHUTDOWN|
			    DNS_VIEWATTR_REQSHUTDOWN);
Brian Wellington's avatar
Brian Wellington committed
142 143
	view->statickeys = NULL;
	view->dynamickeys = NULL;
144
	view->matchclients = NULL;
145
	result = dns_tsigkeyring_create(view->mctx, &view->dynamickeys);
146
	if (result != ISC_R_SUCCESS)
147
		goto cleanup_fwdtable;
148
	view->peers = NULL;
149

150 151
	/*
	 * Initialize configuration data with default values.
152
	 */
153 154
	view->recursion = ISC_TRUE;
	view->auth_nxdomain = ISC_FALSE; /* Was true in BIND 8 */
Michael Graff's avatar
 
Michael Graff committed
155 156
	view->additionalfromcache = ISC_TRUE;
	view->additionalfromauth = ISC_TRUE;
157
	view->transfer_format = dns_one_answer;
158 159
	view->queryacl = NULL;
	view->recursionacl = NULL;
160
	view->v6synthesisacl = NULL;
161
	view->sortlist = NULL;
162 163
	view->requestixfr = ISC_TRUE;
	view->provideixfr = ISC_TRUE;
164 165
	view->maxcachettl = 7 * 24 * 3600;
	view->maxncachettl = 3 * 3600;
166
	view->dstport = 53;
167

168
	result = dns_peerlist_new(view->mctx, &view->peers);
169
	if (result != ISC_R_SUCCESS)
170
		goto cleanup_dynkeys;
Michael Graff's avatar
Michael Graff committed
171
	ISC_LINK_INIT(view, link);
172 173 174 175 176 177
	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
178 179 180
	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
181
	view->magic = DNS_VIEW_MAGIC;
182

Bob Halley's avatar
add  
Bob Halley committed
183 184 185 186
	*viewp = view;

	return (ISC_R_SUCCESS);

187
 cleanup_dynkeys:
188
	dns_tsigkeyring_destroy(&view->dynamickeys);
189

190 191 192
 cleanup_fwdtable:
	dns_fwdtable_destroy(&view->fwdtable);

193 194 195
 cleanup_trustedkeys:
	dns_keytable_detach(&view->trustedkeys);

196
 cleanup_secroots:
197
	dns_keytable_detach(&view->secroots);
198

199 200
 cleanup_zt:
	dns_zt_detach(&view->zonetable);
Bob Halley's avatar
Bob Halley committed
201

202 203 204
 cleanup_rwlock:
	isc_rwlock_destroy(&view->conflock);

Bob Halley's avatar
add  
Bob Halley committed
205
 cleanup_mutex:
206
	DESTROYLOCK(&view->lock);
Bob Halley's avatar
add  
Bob Halley committed
207 208 209 210 211 212 213 214 215 216 217 218 219

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

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

	return (result);
}

static inline void
destroy(dns_view_t *view) {
	REQUIRE(!ISC_LINK_LINKED(view, link));
220
	REQUIRE(view->references == 0);
221
	REQUIRE(view->weakrefs == 0);
222 223
	REQUIRE(RESSHUTDOWN(view));
	REQUIRE(ADBSHUTDOWN(view));
Mark Andrews's avatar
Mark Andrews committed
224
	REQUIRE(REQSHUTDOWN(view));
Bob Halley's avatar
add  
Bob Halley committed
225

226 227
	if (view->peers != NULL)
		dns_peerlist_detach(&view->peers);
228
	if (view->dynamickeys != NULL)
229
		dns_tsigkeyring_destroy(&view->dynamickeys);
230
	if (view->statickeys != NULL)
231
		dns_tsigkeyring_destroy(&view->statickeys);
Bob Halley's avatar
add adb  
Bob Halley committed
232 233
	if (view->adb != NULL)
		dns_adb_detach(&view->adb);
Bob Halley's avatar
add  
Bob Halley committed
234 235
	if (view->resolver != NULL)
		dns_resolver_detach(&view->resolver);
236 237
	if (view->loadmgr != NULL)
		dns_loadmgr_detach(&view->loadmgr);
Mark Andrews's avatar
Mark Andrews committed
238 239
	if (view->requestmgr != NULL)
		dns_requestmgr_detach(&view->requestmgr);
240 241
	if (view->task != NULL)
		isc_task_detach(&view->task);
Bob Halley's avatar
Bob Halley committed
242 243
	if (view->hints != NULL)
		dns_db_detach(&view->hints);
Bob Halley's avatar
Bob Halley committed
244 245
	if (view->cachedb != NULL)
		dns_db_detach(&view->cachedb);
246 247
	if (view->cache != NULL)
		dns_cache_detach(&view->cache);
248 249
	if (view->matchclients != NULL)
		dns_acl_detach(&view->matchclients);
250 251 252 253
	if (view->queryacl != NULL)
		dns_acl_detach(&view->queryacl);
	if (view->recursionacl != NULL)
		dns_acl_detach(&view->recursionacl);
254 255
	if (view->v6synthesisacl != NULL)
		dns_acl_detach(&view->v6synthesisacl);
256 257
	if (view->sortlist != NULL)
		dns_acl_detach(&view->sortlist);
258 259
	dns_keytable_detach(&view->trustedkeys);
	dns_keytable_detach(&view->secroots);
260
	dns_fwdtable_destroy(&view->fwdtable);
261
	isc_rwlock_destroy(&view->conflock);
262
	DESTROYLOCK(&view->lock);
Bob Halley's avatar
add  
Bob Halley committed
263 264 265 266
	isc_mem_free(view->mctx, view->name);
	isc_mem_put(view->mctx, view, sizeof *view);
}

267 268 269 270
/*
 * Return true iff 'view' may be freed.
 * The caller must be holding the view lock.
 */
271 272 273
static isc_boolean_t
all_done(dns_view_t *view) {

274 275
	if (view->references == 0 && view->weakrefs == 0 &&
	    RESSHUTDOWN(view) && ADBSHUTDOWN(view) && REQSHUTDOWN(view))
276 277 278 279 280
		return (ISC_TRUE);

	return (ISC_FALSE);
}

281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297
void
dns_view_attach(dns_view_t *source, dns_view_t **targetp) {

	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;
}

298 299
static void
view_flushanddetach(dns_view_t **viewp, isc_boolean_t flush) {
Bob Halley's avatar
add  
Bob Halley committed
300
	dns_view_t *view;
301
	isc_boolean_t done = ISC_FALSE;
Bob Halley's avatar
add  
Bob Halley committed
302 303 304 305 306 307 308 309 310

	REQUIRE(viewp != NULL);
	view = *viewp;
	REQUIRE(DNS_VIEW_VALID(view));

	LOCK(&view->lock);

	INSIST(view->references > 0);
	view->references--;
311 312 313 314 315
	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
316 317
		if (!REQSHUTDOWN(view))
			dns_requestmgr_shutdown(view->requestmgr);
318 319 320 321
		if (flush)
			dns_zt_flushanddetach(&view->zonetable);
		else
			dns_zt_detach(&view->zonetable);
322 323
		done = all_done(view);
	}
Bob Halley's avatar
add  
Bob Halley committed
324 325 326 327
	UNLOCK(&view->lock);

	*viewp = NULL;

328 329 330 331
	if (done)
		destroy(view);
}

332
void
333 334 335 336 337 338 339 340 341
dns_view_flushanddetach(dns_view_t **viewp) {
	view_flushanddetach(viewp, ISC_TRUE);
}

void
dns_view_detach(dns_view_t **viewp) {
	view_flushanddetach(viewp, ISC_FALSE);
}

Mark Andrews's avatar
Mark Andrews committed
342
static isc_result_t
343 344
dialup(dns_zone_t *zone, void *dummy) {
	UNUSED(dummy);
Mark Andrews's avatar
Mark Andrews committed
345 346 347 348 349 350 351 352 353 354
	dns_zone_dialup(zone);
	return (ISC_R_SUCCESS);
}

void
dns_view_dialup(dns_view_t *view) {
	REQUIRE(DNS_VIEW_VALID(view));
	dns_zt_apply(view->zonetable, ISC_FALSE, dialup, NULL);
}

355
void
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
dns_view_weakattach(dns_view_t *source, dns_view_t **targetp) {

	REQUIRE(DNS_VIEW_VALID(source));
	REQUIRE(targetp != NULL && *targetp == NULL);

	LOCK(&source->lock);
	source->weakrefs++;
	UNLOCK(&source->lock);

	*targetp = source;
}

void
dns_view_weakdetach(dns_view_t **viewp) {
	dns_view_t *view;
	isc_boolean_t done = ISC_FALSE;

	REQUIRE(viewp != NULL);
	view = *viewp;
	REQUIRE(DNS_VIEW_VALID(view));

	LOCK(&view->lock);

	INSIST(view->weakrefs > 0);
	view->weakrefs--;
	done = all_done(view);

	UNLOCK(&view->lock);

	*viewp = NULL;

	if (done)
		destroy(view);
}

391 392
static void
resolver_shutdown(isc_task_t *task, isc_event_t *event) {
393
	dns_view_t *view = event->ev_arg;
394
	isc_boolean_t done;
395

396
	REQUIRE(event->ev_type == DNS_EVENT_VIEWRESSHUTDOWN);
397 398 399
	REQUIRE(DNS_VIEW_VALID(view));
	REQUIRE(view->task == task);

400
	UNUSED(task);
401

402 403 404 405 406 407 408 409 410 411 412 413 414 415 416
	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) {
417
	dns_view_t *view = event->ev_arg;
418
	isc_boolean_t done;
419

420
	REQUIRE(event->ev_type == DNS_EVENT_VIEWADBSHUTDOWN);
421 422 423
	REQUIRE(DNS_VIEW_VALID(view));
	REQUIRE(view->task == task);

424
	UNUSED(task);
425

426 427 428 429 430 431 432 433 434 435
	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
436 437
		destroy(view);
}
438

Mark Andrews's avatar
Mark Andrews committed
439 440 441 442
static void
req_shutdown(isc_task_t *task, isc_event_t *event) {
	dns_view_t *view = event->ev_arg;
	isc_boolean_t done;
443

Mark Andrews's avatar
Mark Andrews committed
444 445 446 447
	REQUIRE(event->ev_type == DNS_EVENT_VIEWREQSHUTDOWN);
	REQUIRE(DNS_VIEW_VALID(view));
	REQUIRE(view->task == task);

448
	UNUSED(task);
449

Mark Andrews's avatar
Mark Andrews committed
450 451 452 453 454 455 456 457 458 459 460 461 462
	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
463
isc_result_t
Bob Halley's avatar
Bob Halley committed
464 465 466 467
dns_view_createresolver(dns_view_t *view,
			isc_taskmgr_t *taskmgr, unsigned int ntasks,
			isc_socketmgr_t *socketmgr,
			isc_timermgr_t *timermgr,
468
			unsigned int options,
469
			dns_dispatchmgr_t *dispatchmgr,
470 471
			dns_dispatch_t *dispatchv4,
			dns_dispatch_t *dispatchv6)
Bob Halley's avatar
Bob Halley committed
472
{
Bob Halley's avatar
add adb  
Bob Halley committed
473
	isc_result_t result;
474
	isc_event_t *event;
Bob Halley's avatar
add adb  
Bob Halley committed
475

476
	REQUIRE(DNS_VIEW_VALID(view));
Bob Halley's avatar
Bob Halley committed
477
	REQUIRE(!view->frozen);
478
	REQUIRE(view->resolver == NULL);
479

Bob Halley's avatar
Bob Halley committed
480
	result = isc_task_create(taskmgr, 0, &view->task);
481 482
	if (result != ISC_R_SUCCESS)
		return (result);
Bob Halley's avatar
Bob Halley committed
483
	isc_task_setname(view->task, "view", view);
484

Bob Halley's avatar
add adb  
Bob Halley committed
485
	result = dns_resolver_create(view, taskmgr, ntasks, socketmgr,
486 487
				     timermgr, options, dispatchmgr,
				     dispatchv4, dispatchv6,
488
				     &view->resolver);
489 490
	if (result != ISC_R_SUCCESS) {
		isc_task_detach(&view->task);
Bob Halley's avatar
add adb  
Bob Halley committed
491
		return (result);
492 493 494 495 496
	}
	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
497 498
	result = dns_adb_create(view->mctx, view, timermgr, taskmgr,
				&view->adb);
499 500 501 502 503 504 505
	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
506

Mark Andrews's avatar
Mark Andrews committed
507
	result = dns_requestmgr_create(view->mctx, timermgr, socketmgr,
David Lawrence's avatar
David Lawrence committed
508 509 510 511 512
				      dns_resolver_taskmgr(view->resolver),
				      dns_resolver_dispatchmgr(view->resolver),
				      dns_resolver_dispatchv4(view->resolver),
				      dns_resolver_dispatchv6(view->resolver),
				      &view->requestmgr);
Mark Andrews's avatar
Mark Andrews committed
513 514 515 516 517 518 519 520 521
	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;

522
	return (ISC_R_SUCCESS);
523 524 525
}

void
526
dns_view_setcache(dns_view_t *view, dns_cache_t *cache) {
527
	REQUIRE(DNS_VIEW_VALID(view));
Bob Halley's avatar
Bob Halley committed
528
	REQUIRE(!view->frozen);
529

530
	if (view->cache != NULL) {
Bob Halley's avatar
add adb  
Bob Halley committed
531
		dns_db_detach(&view->cachedb);
532 533 534 535 536
		dns_cache_detach(&view->cache);
	}
	dns_cache_attach(cache, &view->cache);
	dns_cache_attachdb(cache, &view->cachedb);
	INSIST(DNS_DB_VALID(view->cachedb));
537 538
}

Bob Halley's avatar
Bob Halley committed
539 540 541 542 543 544 545 546 547 548
void
dns_view_sethints(dns_view_t *view, dns_db_t *hints) {
	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
549 550 551 552
void
dns_view_setkeyring(dns_view_t *view, dns_tsig_keyring_t *ring) {
	REQUIRE(DNS_VIEW_VALID(view));
	REQUIRE(ring != NULL);
553
	if (view->statickeys != NULL)
554
		dns_tsigkeyring_destroy(&view->statickeys);
Brian Wellington's avatar
Brian Wellington committed
555 556 557
	view->statickeys = ring;
}

558 559 560 561 562 563
void
dns_view_setdstport(dns_view_t *view, in_port_t dstport) {
	REQUIRE(DNS_VIEW_VALID(view));
	view->dstport = dstport;
}

564 565 566 567 568 569 570 571 572
void
dns_view_setloadmgr(dns_view_t *view, dns_loadmgr_t *loadmgr) {
	REQUIRE(DNS_VIEW_VALID(view));

	if (view->loadmgr != NULL)
		dns_loadmgr_detach(&view->loadmgr);
	dns_loadmgr_attach(loadmgr, &view->loadmgr);
}

573
isc_result_t
574
dns_view_addzone(dns_view_t *view, dns_zone_t *zone) {
Bob Halley's avatar
Bob Halley committed
575 576
	isc_result_t result;

577
	REQUIRE(DNS_VIEW_VALID(view));
Bob Halley's avatar
Bob Halley committed
578 579
	REQUIRE(!view->frozen);

580
	result = dns_zt_mount(view->zonetable, zone);
581

Bob Halley's avatar
Bob Halley committed
582
	return (result);
583 584 585 586
}

void
dns_view_freeze(dns_view_t *view) {
Bob Halley's avatar
Bob Halley committed
587 588 589
	REQUIRE(DNS_VIEW_VALID(view));
	REQUIRE(!view->frozen);

590 591
	if (view->resolver != NULL) {
		INSIST(view->cachedb != NULL);
Bob Halley's avatar
Bob Halley committed
592
		dns_resolver_freeze(view->resolver);
593
	}
Bob Halley's avatar
Bob Halley committed
594 595 596
	view->frozen = ISC_TRUE;
}

597
isc_result_t
598
dns_view_findzone(dns_view_t *view, dns_name_t *name, dns_zone_t **zonep) {
599 600 601 602
	isc_result_t result;

	REQUIRE(DNS_VIEW_VALID(view));

Bob Halley's avatar
Bob Halley committed
603
	result = dns_zt_find(view->zonetable, name, 0, NULL, zonep);
604
	if (result == DNS_R_PARTIALMATCH) {
605
		dns_zone_detach(zonep);
606
		result = ISC_R_NOTFOUND;
607
	}
608

609 610 611
	return (result);
}

Bob Halley's avatar
Bob Halley committed
612 613
isc_result_t
dns_view_find(dns_view_t *view, dns_name_t *name, dns_rdatatype_t type,
614 615
	      isc_stdtime_t now, unsigned int options, isc_boolean_t use_hints,
	      dns_db_t **dbp, dns_dbnode_t **nodep, dns_name_t *foundname,
Bob Halley's avatar
Bob Halley committed
616 617 618
	      dns_rdataset_t *rdataset, dns_rdataset_t *sigrdataset)
{
	isc_result_t result;
619 620
	dns_db_t *db, *zdb;
	dns_dbnode_t *node, *znode;
621
	isc_boolean_t is_cache;
Bob Halley's avatar
Bob Halley committed
622
	dns_rdataset_t zrdataset, zsigrdataset;
623
	dns_zone_t *zone;
Bob Halley's avatar
Bob Halley committed
624 625 626 627 628 629

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

630
	REQUIRE(DNS_VIEW_VALID(view));
Bob Halley's avatar
Bob Halley committed
631
	REQUIRE(view->frozen);
632 633
	REQUIRE(type != dns_rdatatype_sig);
	REQUIRE(rdataset != NULL);  /* XXXBEW - remove this */
Bob Halley's avatar
Bob Halley committed
634 635 636 637 638 639

	/*
	 * Initialize.
	 */
	dns_rdataset_init(&zrdataset);
	dns_rdataset_init(&zsigrdataset);
640 641
	zdb = NULL;
	znode = NULL;
Bob Halley's avatar
Bob Halley committed
642 643 644 645

	/*
	 * Find a database to answer the query.
	 */
646
	zone = NULL;
Bob Halley's avatar
Bob Halley committed
647
	db = NULL;
648
	node = NULL;
Bob Halley's avatar
Bob Halley committed
649
	result = dns_zt_find(view->zonetable, name, 0, NULL, &zone);
650 651
	if (result == ISC_R_SUCCESS || result == DNS_R_PARTIALMATCH) {
		result = dns_zone_getdb(zone, &db);
652
		if (result != ISC_R_SUCCESS && view->cachedb != NULL)
653
			dns_db_attach(view->cachedb, &db);
654
		else if (result != ISC_R_SUCCESS)
655 656
			goto cleanup;
	} else if (result == ISC_R_NOTFOUND && view->cachedb != NULL)
Bob Halley's avatar
Bob Halley committed
657
		dns_db_attach(view->cachedb, &db);
658
	else
Bob Halley's avatar
Bob Halley committed
659 660
		goto cleanup;

661
	is_cache = dns_db_iscache(db);
662

Bob Halley's avatar
Bob Halley committed
663 664 665 666 667
 db_find:
	/*
	 * Now look for an answer in the database.
	 */
	result = dns_db_find(db, name, NULL, type, options,
668
			     now, &node, foundname, rdataset, sigrdataset);
Bob Halley's avatar
Bob Halley committed
669 670

	if (result == DNS_R_DELEGATION ||
671
	    result == ISC_R_NOTFOUND) {
672
		if (dns_rdataset_isassociated(rdataset))
Bob Halley's avatar
Bob Halley committed
673
			dns_rdataset_disassociate(rdataset);
674 675
		if (sigrdataset != NULL &&
		    dns_rdataset_isassociated(sigrdataset))
Bob Halley's avatar
Bob Halley committed
676
			dns_rdataset_disassociate(sigrdataset);
677 678
		if (node != NULL)
			dns_db_detachnode(db, &node);
679
		if (!is_cache) {
680
			dns_db_detach(&db);
Bob Halley's avatar
Bob Halley committed
681 682 683 684 685
			if (view->cachedb != NULL) {
				/*
				 * Either the answer is in the cache, or we
				 * don't know it.
				 */
686
				is_cache = ISC_TRUE;
Bob Halley's avatar
Bob Halley committed
687 688 689 690 691 692 693 694
				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.
			 */
695
			if (dns_rdataset_isassociated(&zrdataset)) {
Bob Halley's avatar
Bob Halley committed
696
				dns_rdataset_clone(&zrdataset, rdataset);
Bob Halley's avatar
Bob Halley committed
697
				if (sigrdataset != NULL &&
698
				    dns_rdataset_isassociated(&zsigrdataset))
Bob Halley's avatar
Bob Halley committed
699 700 701
					dns_rdataset_clone(&zsigrdataset,
							   sigrdataset);
				result = DNS_R_GLUE;
702 703 704 705
				if (db != NULL)
					dns_db_detach(&db);
				dns_db_attach(zdb, &db);
				dns_db_attachnode(db, znode, &node);
Bob Halley's avatar
Bob Halley committed
706 707 708 709 710 711
				goto cleanup;
			}
		}
		/*
		 * We don't know the answer.
		 */
712
		result = ISC_R_NOTFOUND;
Bob Halley's avatar
Bob Halley committed
713 714 715 716 717 718
	} 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.
			 */
719
			is_cache = ISC_TRUE;
Bob Halley's avatar
Bob Halley committed
720 721
			dns_rdataset_clone(rdataset, &zrdataset);
			dns_rdataset_disassociate(rdataset);
Bob Halley's avatar
Bob Halley committed
722
			if (sigrdataset != NULL &&
723
			    dns_rdataset_isassociated(sigrdataset)) {
Bob Halley's avatar
Bob Halley committed
724 725 726
				dns_rdataset_clone(sigrdataset, &zsigrdataset);
				dns_rdataset_disassociate(sigrdataset);
			}
727 728 729
			dns_db_attach(db, &zdb);
			dns_db_attachnode(zdb, node, &znode);
			dns_db_detachnode(db, &node);
Bob Halley's avatar
Bob Halley committed
730 731 732 733 734 735 736 737
			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
738 739
	}

740
	if (result == ISC_R_NOTFOUND && use_hints && view->hints != NULL) {
741
		if (dns_rdataset_isassociated(rdataset))
Bob Halley's avatar
Bob Halley committed
742
			dns_rdataset_disassociate(rdataset);
743 744
		if (sigrdataset != NULL &&
		    dns_rdataset_isassociated(sigrdataset))
Bob Halley's avatar
Bob Halley committed
745
			dns_rdataset_disassociate(sigrdataset);
746 747 748 749 750
		if (db != NULL) {
			if (node != NULL)
				dns_db_detachnode(db, &node);
			dns_db_detach(&db);
		}
Bob Halley's avatar
Bob Halley committed
751
		result = dns_db_find(view->hints, name, NULL, type, options,
752
				     now, &node, foundname,
Bob Halley's avatar
Bob Halley committed
753
				     rdataset, sigrdataset);
Bob Halley's avatar
Bob Halley committed
754 755 756 757 758 759
		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);
760
			dns_db_attach(view->hints, &db);
Bob Halley's avatar
Bob Halley committed
761
			result = DNS_R_HINT;
762 763 764 765
		} else if (result == DNS_R_NXRRSET) {
			dns_db_attach(view->hints, &db);
			result = DNS_R_HINTNXRRSET;
		} else if (result == DNS_R_NXDOMAIN)
766
			result = ISC_R_NOTFOUND;
Bob Halley's avatar
Bob Halley committed
767
	}
Bob Halley's avatar
Bob Halley committed
768 769

 cleanup:
770 771 772 773
	if (result == DNS_R_NXDOMAIN || result == DNS_R_NXRRSET) {
		/*
		 * We don't care about any DNSSEC proof data in these cases.
		 */
774
		if (dns_rdataset_isassociated(rdataset))
775
			dns_rdataset_disassociate(rdataset);
776 777
		if (sigrdataset != NULL &&
		    dns_rdataset_isassociated(sigrdataset))
778 779
			dns_rdataset_disassociate(sigrdataset);
	}
Bob Halley's avatar
Bob Halley committed
780

781
	if (dns_rdataset_isassociated(&zrdataset)) {
Bob Halley's avatar
Bob Halley committed
782
		dns_rdataset_disassociate(&zrdataset);
783
		if (dns_rdataset_isassociated(&zsigrdataset))
Bob Halley's avatar
Bob Halley committed
784 785
			dns_rdataset_disassociate(&zsigrdataset);
	}
786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805

	if (zdb != NULL) {
		if (znode != NULL)
			dns_db_detachnode(zdb, &znode);
		dns_db_detach(&zdb);
	}

	if (db != NULL) {
		if (node != NULL) {
			if (nodep != NULL)
				*nodep = node;
			else
				dns_db_detachnode(db, &node);
		}
		if (dbp != NULL)
			*dbp = db;
		else
			dns_db_detach(&db);
	}

806 807
	if (zone != NULL)
		dns_zone_detach(&zone);
Bob Halley's avatar
Bob Halley committed
808 809

	return (result);
810
}
811

812 813 814 815 816 817 818 819 820 821 822
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,
823
			       NULL, NULL, dns_fixedname_name(&foundname),
824
			       rdataset, sigrdataset);
825 826 827 828 829 830 831
	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.
		 */
832
		if (dns_rdataset_isassociated(rdataset))
833
			dns_rdataset_disassociate(rdataset);
834 835
		if (sigrdataset != NULL &&
		    dns_rdataset_isassociated(sigrdataset))
836 837 838 839 840 841 842
			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 &&
843
		   result != DNS_R_HINTNXRRSET &&
844
		   result != ISC_R_NOTFOUND) {
845
		if (dns_rdataset_isassociated(rdataset))
846
			dns_rdataset_disassociate(rdataset);
847 848
		if (sigrdataset != NULL &&
		    dns_rdataset_isassociated(sigrdataset))
849
			dns_rdataset_disassociate(sigrdataset);
850
		result = ISC_R_NOTFOUND;
851 852 853 854 855
	}

	return (result);
}

Bob Halley's avatar
Bob Halley committed
856 857 858 859 860 861 862 863
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;
864
	isc_boolean_t is_cache, use_zone, try_hints;
Bob Halley's avatar
Bob Halley committed
865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888
	dns_zone_t *zone;
	dns_name_t *zfname;
	dns_rdataset_t zrdataset, zsigrdataset;
	dns_fixedname_t zfixedname;

	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
889
	result = dns_zt_find(view->zonetable, name, 0, NULL, &zone);
890
	if (result == ISC_R_SUCCESS || result == DNS_R_PARTIALMATCH)
Bob Halley's avatar
Bob Halley committed
891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915
		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;
	}
916
	is_cache = dns_db_iscache(db);
Bob Halley's avatar
Bob Halley committed
917 918 919 920 921

 db_find:
	/*
	 * Look for the zonecut.
	 */
922
	if (!is_cache) {
Bob Halley's avatar
Bob Halley committed
923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940
		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)