view.c 29.2 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 1.116 2003/07/25 02:22:24 marka 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/hash.h>
23
#include <isc/task.h>
24
#include <isc/string.h>		/* Required for HP/UX (and others?) */
Michael Graff's avatar
Michael Graff committed
25
#include <isc/util.h>
Bob Halley's avatar
add  
Bob Halley committed
26

27
#include <dns/acl.h>
Bob Halley's avatar
add adb  
Bob Halley committed
28
#include <dns/adb.h>
29
#include <dns/cache.h>
Bob Halley's avatar
Bob Halley committed
30
#include <dns/db.h>
31
#include <dns/events.h>
32
#include <dns/forward.h>
33
#include <dns/keytable.h>
34
#include <dns/master.h>
35
#include <dns/masterdump.h>
36
#include <dns/order.h>
37
#include <dns/peer.h>
Bob Halley's avatar
Bob Halley committed
38
#include <dns/rdataset.h>
Mark Andrews's avatar
Mark Andrews committed
39
#include <dns/request.h>
40 41
#include <dns/resolver.h>
#include <dns/result.h>
Brian Wellington's avatar
Brian Wellington committed
42
#include <dns/tsig.h>
43
#include <dns/zone.h>
44
#include <dns/zt.h>
Bob Halley's avatar
add  
Bob Halley committed
45

46 47
#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
48
#define REQSHUTDOWN(v)	(((v)->attributes & DNS_VIEWATTR_REQSHUTDOWN) != 0)
49 50 51

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
52
static void req_shutdown(isc_task_t *task, isc_event_t *event);
53

Bob Halley's avatar
add  
Bob Halley committed
54
isc_result_t
55 56
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
57 58 59 60 61 62 63 64 65 66 67
{
	dns_view_t *view;
	isc_result_t result;

	/*
	 * Create a view.
	 */

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

Andreas Gustafsson's avatar
Andreas Gustafsson committed
68
	view = isc_mem_get(mctx, sizeof(*view));
Bob Halley's avatar
add  
Bob Halley committed
69 70 71 72 73 74 75 76 77 78 79 80 81 82 83
	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;
	}
84 85
	view->zonetable = NULL;
	result = dns_zt_create(mctx, rdclass, &view->zonetable);
Bob Halley's avatar
add  
Bob Halley committed
86 87
	if (result != ISC_R_SUCCESS) {
		UNEXPECTED_ERROR(__FILE__, __LINE__,
88
				 "dns_zt_create() failed: %s",
Bob Halley's avatar
add  
Bob Halley committed
89 90
				 isc_result_totext(result));
		result = ISC_R_UNEXPECTED;
91
		goto cleanup_mutex;
Bob Halley's avatar
add  
Bob Halley committed
92
	}
Bob Halley's avatar
Bob Halley committed
93
	view->secroots = NULL;
94
	result = dns_keytable_create(mctx, &view->secroots);
Bob Halley's avatar
Bob Halley committed
95 96
	if (result != ISC_R_SUCCESS) {
		UNEXPECTED_ERROR(__FILE__, __LINE__,
97
				 "dns_keytable_create() failed: %s",
Bob Halley's avatar
Bob Halley committed
98 99
				 isc_result_totext(result));
		result = ISC_R_UNEXPECTED;
100
		goto cleanup_zt;
Bob Halley's avatar
Bob Halley committed
101
	}
102 103 104 105 106 107 108 109 110
	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;
	}
111 112 113 114 115 116 117 118 119
	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;
	}
120

121
	view->cache = NULL;
Bob Halley's avatar
Bob Halley committed
122
	view->cachedb = NULL;
Bob Halley's avatar
Bob Halley committed
123
	view->hints = NULL;
Bob Halley's avatar
add  
Bob Halley committed
124
	view->resolver = NULL;
Bob Halley's avatar
add adb  
Bob Halley committed
125
	view->adb = NULL;
Mark Andrews's avatar
Mark Andrews committed
126
	view->requestmgr = NULL;
Bob Halley's avatar
add  
Bob Halley committed
127 128
	view->mctx = mctx;
	view->rdclass = rdclass;
Bob Halley's avatar
Bob Halley committed
129
	view->frozen = ISC_FALSE;
130
	view->task = NULL;
131
	isc_refcount_init(&view->references, 1);
132
	view->weakrefs = 0;
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;
138 139
	view->matchdestinations = NULL;
	view->matchrecursiveonly = ISC_FALSE;
140
	result = dns_tsigkeyring_create(view->mctx, &view->dynamickeys);
141
	if (result != ISC_R_SUCCESS)
142
		goto cleanup_fwdtable;
143
	view->peers = NULL;
144
	view->order = NULL;
145

146 147
	/*
	 * Initialize configuration data with default values.
148
	 */
149 150
	view->recursion = ISC_TRUE;
	view->auth_nxdomain = ISC_FALSE; /* Was true in BIND 8 */
Michael Graff's avatar
 
Michael Graff committed
151 152
	view->additionalfromcache = ISC_TRUE;
	view->additionalfromauth = ISC_TRUE;
Bob Halley's avatar
Bob Halley committed
153
	view->minimalresponses = ISC_FALSE;
154
	view->transfer_format = dns_one_answer;
155 156
	view->queryacl = NULL;
	view->recursionacl = NULL;
157
	view->sortlist = NULL;
158 159
	view->requestixfr = ISC_TRUE;
	view->provideixfr = ISC_TRUE;
160 161
	view->maxcachettl = 7 * 24 * 3600;
	view->maxncachettl = 3 * 3600;
162
	view->dstport = 53;
163
	view->preferred_glue = 0;
164
	view->flush = ISC_FALSE;
165

166
	result = dns_order_create(view->mctx, &view->order);
167
	if (result != ISC_R_SUCCESS)
168
		goto cleanup_dynkeys;
169

170 171 172 173
	result = dns_peerlist_new(view->mctx, &view->peers);
	if (result != ISC_R_SUCCESS)
		goto cleanup_order;

174 175 176 177
	result = dns_aclenv_init(view->mctx, &view->aclenv);
	if (result != ISC_R_SUCCESS)
		goto cleanup_peerlist;

Michael Graff's avatar
Michael Graff committed
178
	ISC_LINK_INIT(view, link);
Andreas Gustafsson's avatar
Andreas Gustafsson committed
179
	ISC_EVENT_INIT(&view->resevent, sizeof(view->resevent), 0, NULL,
180 181
		       DNS_EVENT_VIEWRESSHUTDOWN, resolver_shutdown,
		       view, NULL, NULL, NULL);
Andreas Gustafsson's avatar
Andreas Gustafsson committed
182
	ISC_EVENT_INIT(&view->adbevent, sizeof(view->adbevent), 0, NULL,
183 184
		       DNS_EVENT_VIEWADBSHUTDOWN, adb_shutdown,
		       view, NULL, NULL, NULL);
Andreas Gustafsson's avatar
Andreas Gustafsson committed
185
	ISC_EVENT_INIT(&view->reqevent, sizeof(view->reqevent), 0, NULL,
Mark Andrews's avatar
Mark Andrews committed
186 187
		       DNS_EVENT_VIEWREQSHUTDOWN, req_shutdown,
		       view, NULL, NULL, NULL);
Bob Halley's avatar
add  
Bob Halley committed
188
	view->magic = DNS_VIEW_MAGIC;
189

Bob Halley's avatar
add  
Bob Halley committed
190 191 192 193
	*viewp = view;

	return (ISC_R_SUCCESS);

194 195 196
 cleanup_peerlist:
	dns_peerlist_detach(&view->peers);

197 198 199
 cleanup_order:
	dns_order_detach(&view->order);

200
 cleanup_dynkeys:
201
	dns_tsigkeyring_destroy(&view->dynamickeys);
202

203 204 205
 cleanup_fwdtable:
	dns_fwdtable_destroy(&view->fwdtable);

206 207 208
 cleanup_trustedkeys:
	dns_keytable_detach(&view->trustedkeys);

209
 cleanup_secroots:
210
	dns_keytable_detach(&view->secroots);
211

212 213
 cleanup_zt:
	dns_zt_detach(&view->zonetable);
Bob Halley's avatar
Bob Halley committed
214

Bob Halley's avatar
add  
Bob Halley committed
215
 cleanup_mutex:
216
	DESTROYLOCK(&view->lock);
Bob Halley's avatar
add  
Bob Halley committed
217 218 219 220 221

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

 cleanup_view:
Andreas Gustafsson's avatar
Andreas Gustafsson committed
222
	isc_mem_put(mctx, view, sizeof(*view));
Bob Halley's avatar
add  
Bob Halley committed
223 224 225 226 227 228 229

	return (result);
}

static inline void
destroy(dns_view_t *view) {
	REQUIRE(!ISC_LINK_LINKED(view, link));
230
	REQUIRE(isc_refcount_current(&view->references) == 0);
231
	REQUIRE(view->weakrefs == 0);
232 233
	REQUIRE(RESSHUTDOWN(view));
	REQUIRE(ADBSHUTDOWN(view));
Mark Andrews's avatar
Mark Andrews committed
234
	REQUIRE(REQSHUTDOWN(view));
Bob Halley's avatar
add  
Bob Halley committed
235

236 237
	if (view->order != NULL)
		dns_order_detach(&view->order);
238 239
	if (view->peers != NULL)
		dns_peerlist_detach(&view->peers);
240
	if (view->dynamickeys != NULL)
241
		dns_tsigkeyring_destroy(&view->dynamickeys);
242
	if (view->statickeys != NULL)
243
		dns_tsigkeyring_destroy(&view->statickeys);
Bob Halley's avatar
add adb  
Bob Halley committed
244 245
	if (view->adb != NULL)
		dns_adb_detach(&view->adb);
Bob Halley's avatar
add  
Bob Halley committed
246 247
	if (view->resolver != NULL)
		dns_resolver_detach(&view->resolver);
Mark Andrews's avatar
Mark Andrews committed
248 249
	if (view->requestmgr != NULL)
		dns_requestmgr_detach(&view->requestmgr);
250 251
	if (view->task != NULL)
		isc_task_detach(&view->task);
Bob Halley's avatar
Bob Halley committed
252 253
	if (view->hints != NULL)
		dns_db_detach(&view->hints);
Bob Halley's avatar
Bob Halley committed
254 255
	if (view->cachedb != NULL)
		dns_db_detach(&view->cachedb);
256 257
	if (view->cache != NULL)
		dns_cache_detach(&view->cache);
258 259
	if (view->matchclients != NULL)
		dns_acl_detach(&view->matchclients);
260 261
	if (view->matchdestinations != NULL)
		dns_acl_detach(&view->matchdestinations);
262 263 264 265
	if (view->queryacl != NULL)
		dns_acl_detach(&view->queryacl);
	if (view->recursionacl != NULL)
		dns_acl_detach(&view->recursionacl);
266 267
	if (view->sortlist != NULL)
		dns_acl_detach(&view->sortlist);
268 269
	dns_keytable_detach(&view->trustedkeys);
	dns_keytable_detach(&view->secroots);
270
	dns_fwdtable_destroy(&view->fwdtable);
271
	dns_aclenv_destroy(&view->aclenv);
272
	DESTROYLOCK(&view->lock);
273
	isc_refcount_destroy(&view->references);
Bob Halley's avatar
add  
Bob Halley committed
274
	isc_mem_free(view->mctx, view->name);
Andreas Gustafsson's avatar
Andreas Gustafsson committed
275
	isc_mem_put(view->mctx, view, sizeof(*view));
Bob Halley's avatar
add  
Bob Halley committed
276 277
}

278 279 280 281
/*
 * Return true iff 'view' may be freed.
 * The caller must be holding the view lock.
 */
282 283 284
static isc_boolean_t
all_done(dns_view_t *view) {

285 286
	if (isc_refcount_current(&view->references) == 0 &&
	    view->weakrefs == 0 &&
287
	    RESSHUTDOWN(view) && ADBSHUTDOWN(view) && REQSHUTDOWN(view))
288 289 290 291 292
		return (ISC_TRUE);

	return (ISC_FALSE);
}

293 294 295 296 297 298
void
dns_view_attach(dns_view_t *source, dns_view_t **targetp) {

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

299
	isc_refcount_increment(&source->references, NULL);
300 301 302 303

	*targetp = source;
}

304 305
static void
view_flushanddetach(dns_view_t **viewp, isc_boolean_t flush) {
Bob Halley's avatar
add  
Bob Halley committed
306
	dns_view_t *view;
307
	unsigned int refs;
308
	isc_boolean_t done = ISC_FALSE;
Bob Halley's avatar
add  
Bob Halley committed
309 310 311 312 313

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

314 315
	if (flush)
		view->flush = ISC_TRUE;
316 317 318
	isc_refcount_decrement(&view->references, &refs);
	if (refs == 0) {
		LOCK(&view->lock);
319 320 321 322
		if (!RESSHUTDOWN(view))
			dns_resolver_shutdown(view->resolver);
		if (!ADBSHUTDOWN(view))
			dns_adb_shutdown(view->adb);
Mark Andrews's avatar
Mark Andrews committed
323 324
		if (!REQSHUTDOWN(view))
			dns_requestmgr_shutdown(view->requestmgr);
325
		if (view->flush)
326 327 328
			dns_zt_flushanddetach(&view->zonetable);
		else
			dns_zt_detach(&view->zonetable);
329
		done = all_done(view);
330
		UNLOCK(&view->lock);
331
	}
Bob Halley's avatar
add  
Bob Halley committed
332 333 334

	*viewp = NULL;

335 336 337 338
	if (done)
		destroy(view);
}

339
void
340 341 342 343 344 345 346 347 348
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
349
static isc_result_t
350 351
dialup(dns_zone_t *zone, void *dummy) {
	UNUSED(dummy);
Mark Andrews's avatar
Mark Andrews committed
352 353 354 355 356 357 358
	dns_zone_dialup(zone);
	return (ISC_R_SUCCESS);
}

void
dns_view_dialup(dns_view_t *view) {
	REQUIRE(DNS_VIEW_VALID(view));
359
	(void)dns_zt_apply(view->zonetable, ISC_FALSE, dialup, NULL);
Mark Andrews's avatar
Mark Andrews committed
360 361
}

362
void
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
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);
}

398 399
static void
resolver_shutdown(isc_task_t *task, isc_event_t *event) {
400
	dns_view_t *view = event->ev_arg;
401
	isc_boolean_t done;
402

403
	REQUIRE(event->ev_type == DNS_EVENT_VIEWRESSHUTDOWN);
404 405 406
	REQUIRE(DNS_VIEW_VALID(view));
	REQUIRE(view->task == task);

407
	UNUSED(task);
408

409 410 411 412 413 414 415 416 417 418 419 420 421 422 423
	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) {
424
	dns_view_t *view = event->ev_arg;
425
	isc_boolean_t done;
426

427
	REQUIRE(event->ev_type == DNS_EVENT_VIEWADBSHUTDOWN);
428 429 430
	REQUIRE(DNS_VIEW_VALID(view));
	REQUIRE(view->task == task);

431
	UNUSED(task);
432

433 434 435 436 437 438 439 440 441 442
	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
443 444
		destroy(view);
}
445

Mark Andrews's avatar
Mark Andrews committed
446 447 448 449
static void
req_shutdown(isc_task_t *task, isc_event_t *event) {
	dns_view_t *view = event->ev_arg;
	isc_boolean_t done;
450

Mark Andrews's avatar
Mark Andrews committed
451 452 453 454
	REQUIRE(event->ev_type == DNS_EVENT_VIEWREQSHUTDOWN);
	REQUIRE(DNS_VIEW_VALID(view));
	REQUIRE(view->task == task);

455
	UNUSED(task);
456

Mark Andrews's avatar
Mark Andrews committed
457 458 459 460 461 462 463 464 465 466 467 468 469
	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
470
isc_result_t
Bob Halley's avatar
Bob Halley committed
471 472 473 474
dns_view_createresolver(dns_view_t *view,
			isc_taskmgr_t *taskmgr, unsigned int ntasks,
			isc_socketmgr_t *socketmgr,
			isc_timermgr_t *timermgr,
475
			unsigned int options,
476
			dns_dispatchmgr_t *dispatchmgr,
477 478
			dns_dispatch_t *dispatchv4,
			dns_dispatch_t *dispatchv6)
Bob Halley's avatar
Bob Halley committed
479
{
Bob Halley's avatar
add adb  
Bob Halley committed
480
	isc_result_t result;
481
	isc_event_t *event;
482
	isc_mem_t *mctx = NULL;
Bob Halley's avatar
add adb  
Bob Halley committed
483

484
	REQUIRE(DNS_VIEW_VALID(view));
Bob Halley's avatar
Bob Halley committed
485
	REQUIRE(!view->frozen);
486
	REQUIRE(view->resolver == NULL);
487

Bob Halley's avatar
Bob Halley committed
488
	result = isc_task_create(taskmgr, 0, &view->task);
489 490
	if (result != ISC_R_SUCCESS)
		return (result);
Bob Halley's avatar
Bob Halley committed
491
	isc_task_setname(view->task, "view", view);
492

Bob Halley's avatar
add adb  
Bob Halley committed
493
	result = dns_resolver_create(view, taskmgr, ntasks, socketmgr,
494 495
				     timermgr, options, dispatchmgr,
				     dispatchv4, dispatchv6,
496
				     &view->resolver);
497 498
	if (result != ISC_R_SUCCESS) {
		isc_task_detach(&view->task);
Bob Halley's avatar
add adb  
Bob Halley committed
499
		return (result);
500 501 502 503 504
	}
	event = &view->resevent;
	dns_resolver_whenshutdown(view->resolver, view->task, &event);
	view->attributes &= ~DNS_VIEWATTR_RESSHUTDOWN;

505 506 507
	isc_mem_create(0, 0, &mctx);
	result = dns_adb_create(mctx, view, timermgr, taskmgr, &view->adb);
	isc_mem_detach(&mctx);
508 509 510 511 512 513 514
	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
515

Mark Andrews's avatar
Mark Andrews committed
516
	result = dns_requestmgr_create(view->mctx, timermgr, socketmgr,
David Lawrence's avatar
David Lawrence committed
517 518 519 520 521
				      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
522 523 524 525 526 527 528 529 530
	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;

531
	return (ISC_R_SUCCESS);
532 533 534
}

void
535
dns_view_setcache(dns_view_t *view, dns_cache_t *cache) {
536
	REQUIRE(DNS_VIEW_VALID(view));
Bob Halley's avatar
Bob Halley committed
537
	REQUIRE(!view->frozen);
538

539
	if (view->cache != NULL) {
Bob Halley's avatar
add adb  
Bob Halley committed
540
		dns_db_detach(&view->cachedb);
541 542 543 544 545
		dns_cache_detach(&view->cache);
	}
	dns_cache_attach(cache, &view->cache);
	dns_cache_attachdb(cache, &view->cachedb);
	INSIST(DNS_DB_VALID(view->cachedb));
546 547
}

Bob Halley's avatar
Bob Halley committed
548 549 550 551 552 553 554 555 556 557
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
558 559 560 561
void
dns_view_setkeyring(dns_view_t *view, dns_tsig_keyring_t *ring) {
	REQUIRE(DNS_VIEW_VALID(view));
	REQUIRE(ring != NULL);
562
	if (view->statickeys != NULL)
563
		dns_tsigkeyring_destroy(&view->statickeys);
Brian Wellington's avatar
Brian Wellington committed
564 565 566
	view->statickeys = ring;
}

567 568 569 570 571 572
void
dns_view_setdstport(dns_view_t *view, in_port_t dstport) {
	REQUIRE(DNS_VIEW_VALID(view));
	view->dstport = dstport;
}

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;
767 768 769 770 771 772

		/*
		 * Cleanup if non-standard hints are used.
		 */
		if (db == NULL && node != NULL)
			dns_db_detachnode(view->hints, &node);
Bob Halley's avatar
Bob Halley committed
773
	}
Bob Halley's avatar
Bob Halley committed
774 775

 cleanup:
776 777 778 779
	if (result == DNS_R_NXDOMAIN || result == DNS_R_NXRRSET) {
		/*
		 * We don't care about any DNSSEC proof data in these cases.
		 */
780
		if (dns_rdataset_isassociated(rdataset))
781
			dns_rdataset_disassociate(rdataset);
782 783
		if (sigrdataset != NULL &&
		    dns_rdataset_isassociated(sigrdataset))
784 785
			dns_rdataset_disassociate(sigrdataset);
	}
Bob Halley's avatar
Bob Halley committed
786

787
	if (dns_rdataset_isassociated(&zrdataset)) {
Bob Halley's avatar
Bob Halley committed
788
		dns_rdataset_disassociate(&zrdataset);
789
		if (dns_rdataset_isassociated(&zsigrdataset))
Bob Halley's avatar
Bob Halley committed
790 791
			dns_rdataset_disassociate(&zsigrdataset);
	}
792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809

	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);
810 811
	} else
		INSIST(node == NULL);
812

813 814
	if (zone != NULL)
		dns_zone_detach(&zone);
Bob Halley's avatar
Bob Halley committed
815 816

	return (result);
817
}
818

819 820 821 822 823 824 825 826 827 828 829
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,
830
			       NULL, NULL, dns_fixedname_name(&foundname),
831
			       rdataset, sigrdataset);
832 833 834 835 836 837 838
	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.
		 */
839
		if (dns_rdataset_isassociated(rdataset))
840
			dns_rdataset_disassociate(rdataset);
841 842
		if (sigrdataset != NULL &&
		    dns_rdataset_isassociated(sigrdataset))
843 844 845 846 847 848 849
			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 &&
850
		   result != DNS_R_HINTNXRRSET &&
851
		   result != ISC_R_NOTFOUND) {
852
		if (dns_rdataset_isassociated(rdataset))
853
			dns_rdataset_disassociate(rdataset);
854 855
		if (sigrdataset != NULL &&
		    dns_rdataset_isassociated(sigrdataset))
856
			dns_rdataset_disassociate(sigrdataset);
857
		result = ISC_R_NOTFOUND;
858 859 860 861 862