1/* 2 * Copyright (C) 2004-2012 Internet Systems Consortium, Inc. ("ISC") 3 * Copyright (C) 1999-2003 Internet Software Consortium. 4 * 5 * Permission to use, copy, modify, and/or distribute this software for any 6 * purpose with or without fee is hereby granted, provided that the above 7 * copyright notice and this permission notice appear in all copies. 8 * 9 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH 10 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY 11 * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT, 12 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM 13 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE 14 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR 15 * PERFORMANCE OF THIS SOFTWARE. 16 */ 17 18/* $Id$ */ 19 20/*! \file */ 21 22#include <config.h> 23 24#include <stdlib.h> 25 26#include <isc/buffer.h> 27#include <isc/mem.h> 28#include <isc/random.h> 29#include <isc/serial.h> 30#include <isc/util.h> 31 32#include <dns/name.h> 33#include <dns/ncache.h> 34#include <dns/rdata.h> 35#include <dns/rdataset.h> 36#include <dns/compress.h> 37 38static const char *trustnames[] = { 39 "none", 40 "pending-additional", 41 "pending-answer", 42 "additional", 43 "glue", 44 "answer", 45 "authauthority", 46 "authanswer", 47 "secure", 48 "local" /* aka ultimate */ 49}; 50 51const char * 52dns_trust_totext(dns_trust_t trust) { 53 if (trust >= sizeof(trustnames)/sizeof(*trustnames)) 54 return ("bad"); 55 return (trustnames[trust]); 56} 57 58void 59dns_rdataset_init(dns_rdataset_t *rdataset) { 60 61 /* 62 * Make 'rdataset' a valid, disassociated rdataset. 63 */ 64 65 REQUIRE(rdataset != NULL); 66 67 rdataset->magic = DNS_RDATASET_MAGIC; 68 rdataset->methods = NULL; 69 ISC_LINK_INIT(rdataset, link); 70 rdataset->rdclass = 0; 71 rdataset->type = 0; 72 rdataset->ttl = 0; 73 rdataset->trust = 0; 74 rdataset->covers = 0; 75 rdataset->attributes = 0; 76 rdataset->count = ISC_UINT32_MAX; 77 rdataset->private1 = NULL; 78 rdataset->private2 = NULL; 79 rdataset->private3 = NULL; 80 rdataset->privateuint4 = 0; 81 rdataset->private5 = NULL; 82 rdataset->private6 = NULL; 83 rdataset->resign = 0; 84} 85 86void 87dns_rdataset_invalidate(dns_rdataset_t *rdataset) { 88 89 /* 90 * Invalidate 'rdataset'. 91 */ 92 93 REQUIRE(DNS_RDATASET_VALID(rdataset)); 94 REQUIRE(rdataset->methods == NULL); 95 96 rdataset->magic = 0; 97 ISC_LINK_INIT(rdataset, link); 98 rdataset->rdclass = 0; 99 rdataset->type = 0; 100 rdataset->ttl = 0; 101 rdataset->trust = 0; 102 rdataset->covers = 0; 103 rdataset->attributes = 0; 104 rdataset->count = ISC_UINT32_MAX; 105 rdataset->private1 = NULL; 106 rdataset->private2 = NULL; 107 rdataset->private3 = NULL; 108 rdataset->privateuint4 = 0; 109 rdataset->private5 = NULL; 110} 111 112void 113dns_rdataset_disassociate(dns_rdataset_t *rdataset) { 114 115 /* 116 * Disassociate 'rdataset' from its rdata, allowing it to be reused. 117 */ 118 119 REQUIRE(DNS_RDATASET_VALID(rdataset)); 120 REQUIRE(rdataset->methods != NULL); 121 122 (rdataset->methods->disassociate)(rdataset); 123 rdataset->methods = NULL; 124 ISC_LINK_INIT(rdataset, link); 125 rdataset->rdclass = 0; 126 rdataset->type = 0; 127 rdataset->ttl = 0; 128 rdataset->trust = 0; 129 rdataset->covers = 0; 130 rdataset->attributes = 0; 131 rdataset->count = ISC_UINT32_MAX; 132 rdataset->private1 = NULL; 133 rdataset->private2 = NULL; 134 rdataset->private3 = NULL; 135 rdataset->privateuint4 = 0; 136 rdataset->private5 = NULL; 137 rdataset->private6 = NULL; 138} 139 140isc_boolean_t 141dns_rdataset_isassociated(dns_rdataset_t *rdataset) { 142 /* 143 * Is 'rdataset' associated? 144 */ 145 146 REQUIRE(DNS_RDATASET_VALID(rdataset)); 147 148 if (rdataset->methods != NULL) 149 return (ISC_TRUE); 150 151 return (ISC_FALSE); 152} 153 154static void 155question_disassociate(dns_rdataset_t *rdataset) { 156 UNUSED(rdataset); 157} 158 159static isc_result_t 160question_cursor(dns_rdataset_t *rdataset) { 161 UNUSED(rdataset); 162 163 return (ISC_R_NOMORE); 164} 165 166static void 167question_current(dns_rdataset_t *rdataset, dns_rdata_t *rdata) { 168 /* 169 * This routine should never be called. 170 */ 171 UNUSED(rdataset); 172 UNUSED(rdata); 173 174 REQUIRE(0); 175} 176 177static void 178question_clone(dns_rdataset_t *source, dns_rdataset_t *target) { 179 *target = *source; 180} 181 182static unsigned int 183question_count(dns_rdataset_t *rdataset) { 184 /* 185 * This routine should never be called. 186 */ 187 UNUSED(rdataset); 188 REQUIRE(0); 189 190 return (0); 191} 192 193static dns_rdatasetmethods_t question_methods = { 194 question_disassociate, 195 question_cursor, 196 question_cursor, 197 question_current, 198 question_clone, 199 question_count, 200 NULL, 201 NULL, 202 NULL, 203 NULL, 204 NULL, 205 NULL, 206 NULL, 207 NULL, 208 NULL 209}; 210 211void 212dns_rdataset_makequestion(dns_rdataset_t *rdataset, dns_rdataclass_t rdclass, 213 dns_rdatatype_t type) 214{ 215 216 /* 217 * Make 'rdataset' a valid, associated, question rdataset, with a 218 * question class of 'rdclass' and type 'type'. 219 */ 220 221 REQUIRE(DNS_RDATASET_VALID(rdataset)); 222 REQUIRE(rdataset->methods == NULL); 223 224 rdataset->methods = &question_methods; 225 rdataset->rdclass = rdclass; 226 rdataset->type = type; 227 rdataset->attributes |= DNS_RDATASETATTR_QUESTION; 228} 229 230unsigned int 231dns_rdataset_count(dns_rdataset_t *rdataset) { 232 233 /* 234 * Return the number of records in 'rdataset'. 235 */ 236 237 REQUIRE(DNS_RDATASET_VALID(rdataset)); 238 REQUIRE(rdataset->methods != NULL); 239 240 return ((rdataset->methods->count)(rdataset)); 241} 242 243void 244dns_rdataset_clone(dns_rdataset_t *source, dns_rdataset_t *target) { 245 246 /* 247 * Make 'target' refer to the same rdataset as 'source'. 248 */ 249 250 REQUIRE(DNS_RDATASET_VALID(source)); 251 REQUIRE(source->methods != NULL); 252 REQUIRE(DNS_RDATASET_VALID(target)); 253 REQUIRE(target->methods == NULL); 254 255 (source->methods->clone)(source, target); 256} 257 258isc_result_t 259dns_rdataset_first(dns_rdataset_t *rdataset) { 260 261 /* 262 * Move the rdata cursor to the first rdata in the rdataset (if any). 263 */ 264 265 REQUIRE(DNS_RDATASET_VALID(rdataset)); 266 REQUIRE(rdataset->methods != NULL); 267 268 return ((rdataset->methods->first)(rdataset)); 269} 270 271isc_result_t 272dns_rdataset_next(dns_rdataset_t *rdataset) { 273 274 /* 275 * Move the rdata cursor to the next rdata in the rdataset (if any). 276 */ 277 278 REQUIRE(DNS_RDATASET_VALID(rdataset)); 279 REQUIRE(rdataset->methods != NULL); 280 281 return ((rdataset->methods->next)(rdataset)); 282} 283 284void 285dns_rdataset_current(dns_rdataset_t *rdataset, dns_rdata_t *rdata) { 286 287 /* 288 * Make 'rdata' refer to the current rdata. 289 */ 290 291 REQUIRE(DNS_RDATASET_VALID(rdataset)); 292 REQUIRE(rdataset->methods != NULL); 293 294 (rdataset->methods->current)(rdataset, rdata); 295} 296 297#define MAX_SHUFFLE 32 298#define WANT_FIXED(r) (((r)->attributes & DNS_RDATASETATTR_FIXEDORDER) != 0) 299#define WANT_RANDOM(r) (((r)->attributes & DNS_RDATASETATTR_RANDOMIZE) != 0) 300 301struct towire_sort { 302 int key; 303 dns_rdata_t *rdata; 304}; 305 306static int 307towire_compare(const void *av, const void *bv) { 308 const struct towire_sort *a = (const struct towire_sort *) av; 309 const struct towire_sort *b = (const struct towire_sort *) bv; 310 return (a->key - b->key); 311} 312 313static isc_result_t 314towiresorted(dns_rdataset_t *rdataset, const dns_name_t *owner_name, 315 dns_compress_t *cctx, isc_buffer_t *target, 316 dns_rdatasetorderfunc_t order, const void *order_arg, 317 isc_boolean_t partial, unsigned int options, 318 unsigned int *countp, void **state) 319{ 320 dns_rdata_t rdata = DNS_RDATA_INIT; 321 isc_region_t r; 322 isc_result_t result; 323 unsigned int i, count = 0, added, choice; 324 isc_buffer_t savedbuffer, rdlen, rrbuffer; 325 unsigned int headlen; 326 isc_boolean_t question = ISC_FALSE; 327 isc_boolean_t shuffle = ISC_FALSE; 328 dns_rdata_t *shuffled = NULL, shuffled_fixed[MAX_SHUFFLE]; 329 struct towire_sort *sorted = NULL, sorted_fixed[MAX_SHUFFLE]; 330 331 UNUSED(state); 332 333 /* 334 * Convert 'rdataset' to wire format, compressing names as specified 335 * in cctx, and storing the result in 'target'. 336 */ 337 338 REQUIRE(DNS_RDATASET_VALID(rdataset)); 339 REQUIRE(countp != NULL); 340 REQUIRE((order == NULL) == (order_arg == NULL)); 341 REQUIRE(cctx != NULL && cctx->mctx != NULL); 342 343 if ((rdataset->attributes & DNS_RDATASETATTR_QUESTION) != 0) { 344 question = ISC_TRUE; 345 count = 1; 346 result = dns_rdataset_first(rdataset); 347 INSIST(result == ISC_R_NOMORE); 348 } else if ((rdataset->attributes & DNS_RDATASETATTR_NEGATIVE) != 0) { 349 /* 350 * This is a negative caching rdataset. 351 */ 352 unsigned int ncache_opts = 0; 353 if ((options & DNS_RDATASETTOWIRE_OMITDNSSEC) != 0) 354 ncache_opts |= DNS_NCACHETOWIRE_OMITDNSSEC; 355 return (dns_ncache_towire(rdataset, cctx, target, ncache_opts, 356 countp)); 357 } else { 358 count = (rdataset->methods->count)(rdataset); 359 result = dns_rdataset_first(rdataset); 360 if (result == ISC_R_NOMORE) 361 return (ISC_R_SUCCESS); 362 if (result != ISC_R_SUCCESS) 363 return (result); 364 } 365 366 /* 367 * Do we want to shuffle this answer? 368 */ 369 if (!question && count > 1 && 370 (!WANT_FIXED(rdataset) || order != NULL) && 371 rdataset->type != dns_rdatatype_rrsig) 372 shuffle = ISC_TRUE; 373 374 if (shuffle && count > MAX_SHUFFLE) { 375 shuffled = isc_mem_get(cctx->mctx, count * sizeof(*shuffled)); 376 sorted = isc_mem_get(cctx->mctx, count * sizeof(*sorted)); 377 if (shuffled == NULL || sorted == NULL) 378 shuffle = ISC_FALSE; 379 } else { 380 shuffled = shuffled_fixed; 381 sorted = sorted_fixed; 382 } 383 384 if (shuffle) { 385 /* 386 * First we get handles to all of the rdata. 387 */ 388 i = 0; 389 do { 390 INSIST(i < count); 391 dns_rdata_init(&shuffled[i]); 392 dns_rdataset_current(rdataset, &shuffled[i]); 393 i++; 394 result = dns_rdataset_next(rdataset); 395 } while (result == ISC_R_SUCCESS); 396 if (result != ISC_R_NOMORE) 397 goto cleanup; 398 INSIST(i == count); 399 400 /* 401 * Now we shuffle. 402 */ 403 if (WANT_FIXED(rdataset)) { 404 /* 405 * 'Fixed' order. 406 */ 407 INSIST(order != NULL); 408 for (i = 0; i < count; i++) { 409 sorted[i].key = (*order)(&shuffled[i], 410 order_arg); 411 sorted[i].rdata = &shuffled[i]; 412 } 413 } else if (WANT_RANDOM(rdataset)) { 414 /* 415 * 'Random' order. 416 */ 417 for (i = 0; i < count; i++) { 418 dns_rdata_t rdata; 419 isc_uint32_t val; 420 421 isc_random_get(&val); 422 choice = i + (val % (count - i)); 423 rdata = shuffled[i]; 424 shuffled[i] = shuffled[choice]; 425 shuffled[choice] = rdata; 426 if (order != NULL) 427 sorted[i].key = (*order)(&shuffled[i], 428 order_arg); 429 else 430 sorted[i].key = 0; /* Unused */ 431 sorted[i].rdata = &shuffled[i]; 432 } 433 } else { 434 /* 435 * "Cyclic" order. 436 */ 437 isc_uint32_t val; 438 unsigned int j; 439 440 val = rdataset->count; 441 if (val == ISC_UINT32_MAX) 442 isc_random_get(&val); 443 j = val % count; 444 for (i = 0; i < count; i++) { 445 if (order != NULL) 446 sorted[i].key = (*order)(&shuffled[j], 447 order_arg); 448 else 449 sorted[i].key = 0; /* Unused */ 450 sorted[i].rdata = &shuffled[j]; 451 j++; 452 if (j == count) 453 j = 0; /* Wrap around. */ 454 } 455 } 456 457 /* 458 * Sorted order. 459 */ 460 if (order != NULL) 461 qsort(sorted, count, sizeof(sorted[0]), 462 towire_compare); 463 } 464 465 savedbuffer = *target; 466 i = 0; 467 added = 0; 468 469 do { 470 /* 471 * Copy out the name, type, class, ttl. 472 */ 473 474 rrbuffer = *target; 475 dns_compress_setmethods(cctx, DNS_COMPRESS_GLOBAL14); 476 result = dns_name_towire(owner_name, cctx, target); 477 if (result != ISC_R_SUCCESS) 478 goto rollback; 479 headlen = sizeof(dns_rdataclass_t) + sizeof(dns_rdatatype_t); 480 if (!question) 481 headlen += sizeof(dns_ttl_t) 482 + 2; /* XXX 2 for rdata len */ 483 isc_buffer_availableregion(target, &r); 484 if (r.length < headlen) { 485 result = ISC_R_NOSPACE; 486 goto rollback; 487 } 488 isc_buffer_putuint16(target, rdataset->type); 489 isc_buffer_putuint16(target, rdataset->rdclass); 490 if (!question) { 491 isc_buffer_putuint32(target, rdataset->ttl); 492 493 /* 494 * Save space for rdlen. 495 */ 496 rdlen = *target; 497 isc_buffer_add(target, 2); 498 499 /* 500 * Copy out the rdata 501 */ 502 if (shuffle) 503 rdata = *(sorted[i].rdata); 504 else { 505 dns_rdata_reset(&rdata); 506 dns_rdataset_current(rdataset, &rdata); 507 } 508 result = dns_rdata_towire(&rdata, cctx, target); 509 if (result != ISC_R_SUCCESS) 510 goto rollback; 511 INSIST((target->used >= rdlen.used + 2) && 512 (target->used - rdlen.used - 2 < 65536)); 513 isc_buffer_putuint16(&rdlen, 514 (isc_uint16_t)(target->used - 515 rdlen.used - 2)); 516 added++; 517 } 518 519 if (shuffle) { 520 i++; 521 if (i == count) 522 result = ISC_R_NOMORE; 523 else 524 result = ISC_R_SUCCESS; 525 } else { 526 result = dns_rdataset_next(rdataset); 527 } 528 } while (result == ISC_R_SUCCESS); 529 530 if (result != ISC_R_NOMORE) 531 goto rollback; 532 533 *countp += count; 534 535 result = ISC_R_SUCCESS; 536 goto cleanup; 537 538 rollback: 539 if (partial && result == ISC_R_NOSPACE) { 540 INSIST(rrbuffer.used < 65536); 541 dns_compress_rollback(cctx, (isc_uint16_t)rrbuffer.used); 542 *countp += added; 543 *target = rrbuffer; 544 goto cleanup; 545 } 546 INSIST(savedbuffer.used < 65536); 547 dns_compress_rollback(cctx, (isc_uint16_t)savedbuffer.used); 548 *countp = 0; 549 *target = savedbuffer; 550 551 cleanup: 552 if (sorted != NULL && sorted != sorted_fixed) 553 isc_mem_put(cctx->mctx, sorted, count * sizeof(*sorted)); 554 if (shuffled != NULL && shuffled != shuffled_fixed) 555 isc_mem_put(cctx->mctx, shuffled, count * sizeof(*shuffled)); 556 return (result); 557} 558 559isc_result_t 560dns_rdataset_towiresorted(dns_rdataset_t *rdataset, 561 const dns_name_t *owner_name, 562 dns_compress_t *cctx, 563 isc_buffer_t *target, 564 dns_rdatasetorderfunc_t order, 565 const void *order_arg, 566 unsigned int options, 567 unsigned int *countp) 568{ 569 return (towiresorted(rdataset, owner_name, cctx, target, 570 order, order_arg, ISC_FALSE, options, 571 countp, NULL)); 572} 573 574isc_result_t 575dns_rdataset_towirepartial(dns_rdataset_t *rdataset, 576 const dns_name_t *owner_name, 577 dns_compress_t *cctx, 578 isc_buffer_t *target, 579 dns_rdatasetorderfunc_t order, 580 const void *order_arg, 581 unsigned int options, 582 unsigned int *countp, 583 void **state) 584{ 585 REQUIRE(state == NULL); /* XXX remove when implemented */ 586 return (towiresorted(rdataset, owner_name, cctx, target, 587 order, order_arg, ISC_TRUE, options, 588 countp, state)); 589} 590 591isc_result_t 592dns_rdataset_towire(dns_rdataset_t *rdataset, 593 dns_name_t *owner_name, 594 dns_compress_t *cctx, 595 isc_buffer_t *target, 596 unsigned int options, 597 unsigned int *countp) 598{ 599 return (towiresorted(rdataset, owner_name, cctx, target, 600 NULL, NULL, ISC_FALSE, options, countp, NULL)); 601} 602 603isc_result_t 604dns_rdataset_additionaldata(dns_rdataset_t *rdataset, 605 dns_additionaldatafunc_t add, void *arg) 606{ 607 dns_rdata_t rdata = DNS_RDATA_INIT; 608 isc_result_t result; 609 610 /* 611 * For each rdata in rdataset, call 'add' for each name and type in the 612 * rdata which is subject to additional section processing. 613 */ 614 615 REQUIRE(DNS_RDATASET_VALID(rdataset)); 616 REQUIRE((rdataset->attributes & DNS_RDATASETATTR_QUESTION) == 0); 617 618 result = dns_rdataset_first(rdataset); 619 if (result != ISC_R_SUCCESS) 620 return (result); 621 622 do { 623 dns_rdataset_current(rdataset, &rdata); 624 result = dns_rdata_additionaldata(&rdata, add, arg); 625 if (result == ISC_R_SUCCESS) 626 result = dns_rdataset_next(rdataset); 627 dns_rdata_reset(&rdata); 628 } while (result == ISC_R_SUCCESS); 629 630 if (result != ISC_R_NOMORE) 631 return (result); 632 633 return (ISC_R_SUCCESS); 634} 635 636isc_result_t 637dns_rdataset_addnoqname(dns_rdataset_t *rdataset, dns_name_t *name) { 638 639 REQUIRE(DNS_RDATASET_VALID(rdataset)); 640 REQUIRE(rdataset->methods != NULL); 641 if (rdataset->methods->addnoqname == NULL) 642 return (ISC_R_NOTIMPLEMENTED); 643 return((rdataset->methods->addnoqname)(rdataset, name)); 644} 645 646isc_result_t 647dns_rdataset_getnoqname(dns_rdataset_t *rdataset, dns_name_t *name, 648 dns_rdataset_t *neg, dns_rdataset_t *negsig) 649{ 650 REQUIRE(DNS_RDATASET_VALID(rdataset)); 651 REQUIRE(rdataset->methods != NULL); 652 653 if (rdataset->methods->getnoqname == NULL) 654 return (ISC_R_NOTIMPLEMENTED); 655 return((rdataset->methods->getnoqname)(rdataset, name, neg, negsig)); 656} 657 658isc_result_t 659dns_rdataset_addclosest(dns_rdataset_t *rdataset, dns_name_t *name) { 660 661 REQUIRE(DNS_RDATASET_VALID(rdataset)); 662 REQUIRE(rdataset->methods != NULL); 663 if (rdataset->methods->addclosest == NULL) 664 return (ISC_R_NOTIMPLEMENTED); 665 return((rdataset->methods->addclosest)(rdataset, name)); 666} 667 668isc_result_t 669dns_rdataset_getclosest(dns_rdataset_t *rdataset, dns_name_t *name, 670 dns_rdataset_t *neg, dns_rdataset_t *negsig) 671{ 672 REQUIRE(DNS_RDATASET_VALID(rdataset)); 673 REQUIRE(rdataset->methods != NULL); 674 675 if (rdataset->methods->getclosest == NULL) 676 return (ISC_R_NOTIMPLEMENTED); 677 return((rdataset->methods->getclosest)(rdataset, name, neg, negsig)); 678} 679 680/* 681 * Additional cache stuff 682 */ 683isc_result_t 684dns_rdataset_getadditional(dns_rdataset_t *rdataset, 685 dns_rdatasetadditional_t type, 686 dns_rdatatype_t qtype, 687 dns_acache_t *acache, 688 dns_zone_t **zonep, 689 dns_db_t **dbp, 690 dns_dbversion_t **versionp, 691 dns_dbnode_t **nodep, 692 dns_name_t *fname, 693 dns_message_t *msg, 694 isc_stdtime_t now) 695{ 696 REQUIRE(DNS_RDATASET_VALID(rdataset)); 697 REQUIRE(rdataset->methods != NULL); 698 REQUIRE(zonep == NULL || *zonep == NULL); 699 REQUIRE(dbp != NULL && *dbp == NULL); 700 REQUIRE(versionp != NULL && *versionp == NULL); 701 REQUIRE(nodep != NULL && *nodep == NULL); 702 REQUIRE(fname != NULL); 703 REQUIRE(msg != NULL); 704 705 if (acache != NULL && rdataset->methods->getadditional != NULL) { 706 return ((rdataset->methods->getadditional)(rdataset, type, 707 qtype, acache, 708 zonep, dbp, 709 versionp, nodep, 710 fname, msg, now)); 711 } 712 713 return (ISC_R_FAILURE); 714} 715 716isc_result_t 717dns_rdataset_setadditional(dns_rdataset_t *rdataset, 718 dns_rdatasetadditional_t type, 719 dns_rdatatype_t qtype, 720 dns_acache_t *acache, 721 dns_zone_t *zone, 722 dns_db_t *db, 723 dns_dbversion_t *version, 724 dns_dbnode_t *node, 725 dns_name_t *fname) 726{ 727 REQUIRE(DNS_RDATASET_VALID(rdataset)); 728 REQUIRE(rdataset->methods != NULL); 729 730 if (acache != NULL && rdataset->methods->setadditional != NULL) { 731 return ((rdataset->methods->setadditional)(rdataset, type, 732 qtype, acache, zone, 733 db, version, 734 node, fname)); 735 } 736 737 return (ISC_R_FAILURE); 738} 739 740isc_result_t 741dns_rdataset_putadditional(dns_acache_t *acache, 742 dns_rdataset_t *rdataset, 743 dns_rdatasetadditional_t type, 744 dns_rdatatype_t qtype) 745{ 746 REQUIRE(DNS_RDATASET_VALID(rdataset)); 747 REQUIRE(rdataset->methods != NULL); 748 749 if (acache != NULL && rdataset->methods->putadditional != NULL) { 750 return ((rdataset->methods->putadditional)(acache, rdataset, 751 type, qtype)); 752 } 753 754 return (ISC_R_FAILURE); 755} 756 757void 758dns_rdataset_settrust(dns_rdataset_t *rdataset, dns_trust_t trust) { 759 REQUIRE(DNS_RDATASET_VALID(rdataset)); 760 REQUIRE(rdataset->methods != NULL); 761 762 if (rdataset->methods->settrust != NULL) 763 (rdataset->methods->settrust)(rdataset, trust); 764 else 765 rdataset->trust = trust; 766} 767 768void 769dns_rdataset_expire(dns_rdataset_t *rdataset) { 770 REQUIRE(DNS_RDATASET_VALID(rdataset)); 771 REQUIRE(rdataset->methods != NULL); 772 773 if (rdataset->methods->expire != NULL) 774 (rdataset->methods->expire)(rdataset); 775} 776 777void 778dns_rdataset_trimttl(dns_rdataset_t *rdataset, dns_rdataset_t *sigrdataset, 779 dns_rdata_rrsig_t *rrsig, isc_stdtime_t now, 780 isc_boolean_t acceptexpired) 781{ 782 isc_uint32_t ttl = 0; 783 784 REQUIRE(DNS_RDATASET_VALID(rdataset)); 785 REQUIRE(DNS_RDATASET_VALID(sigrdataset)); 786 REQUIRE(rrsig != NULL); 787 788 /* 789 * If we accept expired RRsets keep them for no more than 120 seconds. 790 */ 791 if (acceptexpired && 792 (isc_serial_le(rrsig->timeexpire, ((now + 120) & 0xffffffff)) || 793 isc_serial_le(rrsig->timeexpire, now))) 794 ttl = 120; 795 else if (isc_serial_ge(rrsig->timeexpire, now)) 796 ttl = rrsig->timeexpire - now; 797 798 ttl = ISC_MIN(ISC_MIN(rdataset->ttl, sigrdataset->ttl), 799 ISC_MIN(rrsig->originalttl, ttl)); 800 rdataset->ttl = ttl; 801 sigrdataset->ttl = ttl; 802} 803