1 /*
2 * Copyright (C) 2004-2012, 2014, 2015 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
38 static 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
51 const char *
dns_trust_totext(dns_trust_t trust)52 dns_trust_totext(dns_trust_t trust) {
53 if (trust >= sizeof(trustnames)/sizeof(*trustnames))
54 return ("bad");
55 return (trustnames[trust]);
56 }
57
58 void
dns_rdataset_init(dns_rdataset_t * rdataset)59 dns_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->private7 = NULL;
84 rdataset->resign = 0;
85 }
86
87 void
dns_rdataset_invalidate(dns_rdataset_t * rdataset)88 dns_rdataset_invalidate(dns_rdataset_t *rdataset) {
89
90 /*
91 * Invalidate 'rdataset'.
92 */
93
94 REQUIRE(DNS_RDATASET_VALID(rdataset));
95 REQUIRE(rdataset->methods == NULL);
96
97 rdataset->magic = 0;
98 ISC_LINK_INIT(rdataset, link);
99 rdataset->rdclass = 0;
100 rdataset->type = 0;
101 rdataset->ttl = 0;
102 rdataset->trust = 0;
103 rdataset->covers = 0;
104 rdataset->attributes = 0;
105 rdataset->count = ISC_UINT32_MAX;
106 rdataset->private1 = NULL;
107 rdataset->private2 = NULL;
108 rdataset->private3 = NULL;
109 rdataset->privateuint4 = 0;
110 rdataset->private5 = NULL;
111 }
112
113 void
dns_rdataset_disassociate(dns_rdataset_t * rdataset)114 dns_rdataset_disassociate(dns_rdataset_t *rdataset) {
115
116 /*
117 * Disassociate 'rdataset' from its rdata, allowing it to be reused.
118 */
119
120 REQUIRE(DNS_RDATASET_VALID(rdataset));
121 REQUIRE(rdataset->methods != NULL);
122
123 (rdataset->methods->disassociate)(rdataset);
124 rdataset->methods = NULL;
125 ISC_LINK_INIT(rdataset, link);
126 rdataset->rdclass = 0;
127 rdataset->type = 0;
128 rdataset->ttl = 0;
129 rdataset->trust = 0;
130 rdataset->covers = 0;
131 rdataset->attributes = 0;
132 rdataset->count = ISC_UINT32_MAX;
133 rdataset->private1 = NULL;
134 rdataset->private2 = NULL;
135 rdataset->private3 = NULL;
136 rdataset->privateuint4 = 0;
137 rdataset->private5 = NULL;
138 rdataset->private6 = NULL;
139 }
140
141 isc_boolean_t
dns_rdataset_isassociated(dns_rdataset_t * rdataset)142 dns_rdataset_isassociated(dns_rdataset_t *rdataset) {
143 /*
144 * Is 'rdataset' associated?
145 */
146
147 REQUIRE(DNS_RDATASET_VALID(rdataset));
148
149 if (rdataset->methods != NULL)
150 return (ISC_TRUE);
151
152 return (ISC_FALSE);
153 }
154
155 static void
question_disassociate(dns_rdataset_t * rdataset)156 question_disassociate(dns_rdataset_t *rdataset) {
157 UNUSED(rdataset);
158 }
159
160 static isc_result_t
question_cursor(dns_rdataset_t * rdataset)161 question_cursor(dns_rdataset_t *rdataset) {
162 UNUSED(rdataset);
163
164 return (ISC_R_NOMORE);
165 }
166
167 static void
question_current(dns_rdataset_t * rdataset,dns_rdata_t * rdata)168 question_current(dns_rdataset_t *rdataset, dns_rdata_t *rdata) {
169 /*
170 * This routine should never be called.
171 */
172 UNUSED(rdataset);
173 UNUSED(rdata);
174
175 REQUIRE(0);
176 }
177
178 static void
question_clone(dns_rdataset_t * source,dns_rdataset_t * target)179 question_clone(dns_rdataset_t *source, dns_rdataset_t *target) {
180 *target = *source;
181 }
182
183 static unsigned int
question_count(dns_rdataset_t * rdataset)184 question_count(dns_rdataset_t *rdataset) {
185 /*
186 * This routine should never be called.
187 */
188 UNUSED(rdataset);
189 REQUIRE(0);
190
191 return (0);
192 }
193
194 static dns_rdatasetmethods_t question_methods = {
195 question_disassociate,
196 question_cursor,
197 question_cursor,
198 question_current,
199 question_clone,
200 question_count,
201 NULL,
202 NULL,
203 NULL,
204 NULL,
205 NULL,
206 NULL,
207 NULL,
208 NULL,
209 NULL
210 };
211
212 void
dns_rdataset_makequestion(dns_rdataset_t * rdataset,dns_rdataclass_t rdclass,dns_rdatatype_t type)213 dns_rdataset_makequestion(dns_rdataset_t *rdataset, dns_rdataclass_t rdclass,
214 dns_rdatatype_t type)
215 {
216
217 /*
218 * Make 'rdataset' a valid, associated, question rdataset, with a
219 * question class of 'rdclass' and type 'type'.
220 */
221
222 REQUIRE(DNS_RDATASET_VALID(rdataset));
223 REQUIRE(rdataset->methods == NULL);
224
225 rdataset->methods = &question_methods;
226 rdataset->rdclass = rdclass;
227 rdataset->type = type;
228 rdataset->attributes |= DNS_RDATASETATTR_QUESTION;
229 }
230
231 unsigned int
dns_rdataset_count(dns_rdataset_t * rdataset)232 dns_rdataset_count(dns_rdataset_t *rdataset) {
233
234 /*
235 * Return the number of records in 'rdataset'.
236 */
237
238 REQUIRE(DNS_RDATASET_VALID(rdataset));
239 REQUIRE(rdataset->methods != NULL);
240
241 return ((rdataset->methods->count)(rdataset));
242 }
243
244 void
dns_rdataset_clone(dns_rdataset_t * source,dns_rdataset_t * target)245 dns_rdataset_clone(dns_rdataset_t *source, dns_rdataset_t *target) {
246
247 /*
248 * Make 'target' refer to the same rdataset as 'source'.
249 */
250
251 REQUIRE(DNS_RDATASET_VALID(source));
252 REQUIRE(source->methods != NULL);
253 REQUIRE(DNS_RDATASET_VALID(target));
254 REQUIRE(target->methods == NULL);
255
256 (source->methods->clone)(source, target);
257 }
258
259 isc_result_t
dns_rdataset_first(dns_rdataset_t * rdataset)260 dns_rdataset_first(dns_rdataset_t *rdataset) {
261
262 /*
263 * Move the rdata cursor to the first rdata in the rdataset (if any).
264 */
265
266 REQUIRE(DNS_RDATASET_VALID(rdataset));
267 REQUIRE(rdataset->methods != NULL);
268
269 return ((rdataset->methods->first)(rdataset));
270 }
271
272 isc_result_t
dns_rdataset_next(dns_rdataset_t * rdataset)273 dns_rdataset_next(dns_rdataset_t *rdataset) {
274
275 /*
276 * Move the rdata cursor to the next rdata in the rdataset (if any).
277 */
278
279 REQUIRE(DNS_RDATASET_VALID(rdataset));
280 REQUIRE(rdataset->methods != NULL);
281
282 return ((rdataset->methods->next)(rdataset));
283 }
284
285 void
dns_rdataset_current(dns_rdataset_t * rdataset,dns_rdata_t * rdata)286 dns_rdataset_current(dns_rdataset_t *rdataset, dns_rdata_t *rdata) {
287
288 /*
289 * Make 'rdata' refer to the current rdata.
290 */
291
292 REQUIRE(DNS_RDATASET_VALID(rdataset));
293 REQUIRE(rdataset->methods != NULL);
294
295 (rdataset->methods->current)(rdataset, rdata);
296 }
297
298 #define MAX_SHUFFLE 32
299 #define WANT_FIXED(r) (((r)->attributes & DNS_RDATASETATTR_FIXEDORDER) != 0)
300 #define WANT_RANDOM(r) (((r)->attributes & DNS_RDATASETATTR_RANDOMIZE) != 0)
301
302 struct towire_sort {
303 int key;
304 dns_rdata_t *rdata;
305 };
306
307 static int
towire_compare(const void * av,const void * bv)308 towire_compare(const void *av, const void *bv) {
309 const struct towire_sort *a = (const struct towire_sort *) av;
310 const struct towire_sort *b = (const struct towire_sort *) bv;
311 return (a->key - b->key);
312 }
313
314 static isc_result_t
towiresorted(dns_rdataset_t * rdataset,const dns_name_t * owner_name,dns_compress_t * cctx,isc_buffer_t * target,dns_rdatasetorderfunc_t order,const void * order_arg,isc_boolean_t partial,unsigned int options,unsigned int * countp,void ** state)315 towiresorted(dns_rdataset_t *rdataset, const dns_name_t *owner_name,
316 dns_compress_t *cctx, isc_buffer_t *target,
317 dns_rdatasetorderfunc_t order, const void *order_arg,
318 isc_boolean_t partial, unsigned int options,
319 unsigned int *countp, void **state)
320 {
321 dns_rdata_t rdata = DNS_RDATA_INIT;
322 isc_region_t r;
323 isc_result_t result;
324 unsigned int i, count = 0, added, choice;
325 isc_buffer_t savedbuffer, rdlen, rrbuffer;
326 unsigned int headlen;
327 isc_boolean_t question = ISC_FALSE;
328 isc_boolean_t shuffle = ISC_FALSE;
329 dns_rdata_t *shuffled = NULL, shuffled_fixed[MAX_SHUFFLE];
330 struct towire_sort *sorted = NULL, sorted_fixed[MAX_SHUFFLE];
331
332 UNUSED(state);
333
334 /*
335 * Convert 'rdataset' to wire format, compressing names as specified
336 * in cctx, and storing the result in 'target'.
337 */
338
339 REQUIRE(DNS_RDATASET_VALID(rdataset));
340 REQUIRE(countp != NULL);
341 REQUIRE((order == NULL) == (order_arg == NULL));
342 REQUIRE(cctx != NULL && cctx->mctx != NULL);
343
344 if ((rdataset->attributes & DNS_RDATASETATTR_QUESTION) != 0) {
345 question = ISC_TRUE;
346 count = 1;
347 result = dns_rdataset_first(rdataset);
348 INSIST(result == ISC_R_NOMORE);
349 } else if ((rdataset->attributes & DNS_RDATASETATTR_NEGATIVE) != 0) {
350 /*
351 * This is a negative caching rdataset.
352 */
353 unsigned int ncache_opts = 0;
354 if ((options & DNS_RDATASETTOWIRE_OMITDNSSEC) != 0)
355 ncache_opts |= DNS_NCACHETOWIRE_OMITDNSSEC;
356 return (dns_ncache_towire(rdataset, cctx, target, ncache_opts,
357 countp));
358 } else {
359 count = (rdataset->methods->count)(rdataset);
360 result = dns_rdataset_first(rdataset);
361 if (result == ISC_R_NOMORE)
362 return (ISC_R_SUCCESS);
363 if (result != ISC_R_SUCCESS)
364 return (result);
365 }
366
367 /*
368 * Do we want to shuffle this answer?
369 */
370 if (!question && count > 1 &&
371 (!WANT_FIXED(rdataset) || order != NULL) &&
372 rdataset->type != dns_rdatatype_rrsig)
373 shuffle = ISC_TRUE;
374
375 if (shuffle && count > MAX_SHUFFLE) {
376 shuffled = isc_mem_get(cctx->mctx, count * sizeof(*shuffled));
377 sorted = isc_mem_get(cctx->mctx, count * sizeof(*sorted));
378 if (shuffled == NULL || sorted == NULL)
379 shuffle = ISC_FALSE;
380 } else {
381 shuffled = shuffled_fixed;
382 sorted = sorted_fixed;
383 }
384
385 if (shuffle) {
386 /*
387 * First we get handles to all of the rdata.
388 */
389 i = 0;
390 do {
391 INSIST(i < count);
392 dns_rdata_init(&shuffled[i]);
393 dns_rdataset_current(rdataset, &shuffled[i]);
394 i++;
395 result = dns_rdataset_next(rdataset);
396 } while (result == ISC_R_SUCCESS);
397 if (result != ISC_R_NOMORE)
398 goto cleanup;
399 INSIST(i == count);
400
401 /*
402 * Now we shuffle.
403 */
404 if (WANT_FIXED(rdataset)) {
405 /*
406 * 'Fixed' order.
407 */
408 INSIST(order != NULL);
409 for (i = 0; i < count; i++) {
410 sorted[i].key = (*order)(&shuffled[i],
411 order_arg);
412 sorted[i].rdata = &shuffled[i];
413 }
414 } else if (WANT_RANDOM(rdataset)) {
415 /*
416 * 'Random' order.
417 */
418 for (i = 0; i < count; i++) {
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
559 isc_result_t
dns_rdataset_towiresorted(dns_rdataset_t * rdataset,const dns_name_t * owner_name,dns_compress_t * cctx,isc_buffer_t * target,dns_rdatasetorderfunc_t order,const void * order_arg,unsigned int options,unsigned int * countp)560 dns_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
574 isc_result_t
dns_rdataset_towirepartial(dns_rdataset_t * rdataset,const dns_name_t * owner_name,dns_compress_t * cctx,isc_buffer_t * target,dns_rdatasetorderfunc_t order,const void * order_arg,unsigned int options,unsigned int * countp,void ** state)575 dns_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
591 isc_result_t
dns_rdataset_towire(dns_rdataset_t * rdataset,dns_name_t * owner_name,dns_compress_t * cctx,isc_buffer_t * target,unsigned int options,unsigned int * countp)592 dns_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
603 isc_result_t
dns_rdataset_additionaldata(dns_rdataset_t * rdataset,dns_additionaldatafunc_t add,void * arg)604 dns_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
636 isc_result_t
dns_rdataset_addnoqname(dns_rdataset_t * rdataset,dns_name_t * name)637 dns_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
646 isc_result_t
dns_rdataset_getnoqname(dns_rdataset_t * rdataset,dns_name_t * name,dns_rdataset_t * neg,dns_rdataset_t * negsig)647 dns_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
658 isc_result_t
dns_rdataset_addclosest(dns_rdataset_t * rdataset,dns_name_t * name)659 dns_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
668 isc_result_t
dns_rdataset_getclosest(dns_rdataset_t * rdataset,dns_name_t * name,dns_rdataset_t * neg,dns_rdataset_t * negsig)669 dns_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 */
683 isc_result_t
dns_rdataset_getadditional(dns_rdataset_t * rdataset,dns_rdatasetadditional_t type,dns_rdatatype_t qtype,dns_acache_t * acache,dns_zone_t ** zonep,dns_db_t ** dbp,dns_dbversion_t ** versionp,dns_dbnode_t ** nodep,dns_name_t * fname,dns_message_t * msg,isc_stdtime_t now)684 dns_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
716 isc_result_t
dns_rdataset_setadditional(dns_rdataset_t * rdataset,dns_rdatasetadditional_t type,dns_rdatatype_t qtype,dns_acache_t * acache,dns_zone_t * zone,dns_db_t * db,dns_dbversion_t * version,dns_dbnode_t * node,dns_name_t * fname)717 dns_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
740 isc_result_t
dns_rdataset_putadditional(dns_acache_t * acache,dns_rdataset_t * rdataset,dns_rdatasetadditional_t type,dns_rdatatype_t qtype)741 dns_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
757 void
dns_rdataset_settrust(dns_rdataset_t * rdataset,dns_trust_t trust)758 dns_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
768 void
dns_rdataset_expire(dns_rdataset_t * rdataset)769 dns_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
777 void
dns_rdataset_trimttl(dns_rdataset_t * rdataset,dns_rdataset_t * sigrdataset,dns_rdata_rrsig_t * rrsig,isc_stdtime_t now,isc_boolean_t acceptexpired)778 dns_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