2 * Copyright (C) 2004-2009 Internet Systems Consortium, Inc. ("ISC")
3 * Copyright (C) 1999-2003 Internet Software Consortium.
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.
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.
18 /* $Id: message.c,v 1.245.50.3 2009/11/24 03:25:53 marka Exp $ */
29 #include <isc/buffer.h>
31 #include <isc/print.h>
32 #include <isc/string.h> /* Required for HP/UX (and others?) */
35 #include <dns/dnssec.h>
36 #include <dns/keyvalues.h>
38 #include <dns/masterdump.h>
39 #include <dns/message.h>
40 #include <dns/opcode.h>
41 #include <dns/rdata.h>
42 #include <dns/rdatalist.h>
43 #include <dns/rdataset.h>
44 #include <dns/rdatastruct.h>
45 #include <dns/result.h>
51 hexdump(const char *msg, const char *msg2, void *base, size_t len) {
58 printf("*** %s [%s] (%u bytes @ %p)\n", msg, msg2, len, base);
63 else if (cnt % 8 == 0)
65 printf(" %02x %c", *p, (isprint(*p) ? *p : ' '));
78 #define DNS_MESSAGE_OPCODE_MASK 0x7800U
79 #define DNS_MESSAGE_OPCODE_SHIFT 11
80 #define DNS_MESSAGE_RCODE_MASK 0x000fU
81 #define DNS_MESSAGE_FLAG_MASK 0x8ff0U
82 #define DNS_MESSAGE_EDNSRCODE_MASK 0xff000000U
83 #define DNS_MESSAGE_EDNSRCODE_SHIFT 24
84 #define DNS_MESSAGE_EDNSVERSION_MASK 0x00ff0000U
85 #define DNS_MESSAGE_EDNSVERSION_SHIFT 16
87 #define VALID_NAMED_SECTION(s) (((s) > DNS_SECTION_ANY) \
88 && ((s) < DNS_SECTION_MAX))
89 #define VALID_SECTION(s) (((s) >= DNS_SECTION_ANY) \
90 && ((s) < DNS_SECTION_MAX))
91 #define ADD_STRING(b, s) {if (strlen(s) >= \
92 isc_buffer_availablelength(b)) \
93 return(ISC_R_NOSPACE); else \
94 isc_buffer_putstr(b, s);}
95 #define VALID_PSEUDOSECTION(s) (((s) >= DNS_PSEUDOSECTION_ANY) \
96 && ((s) < DNS_PSEUDOSECTION_MAX))
98 #define OPTOUT(x) (((x)->attributes & DNS_RDATASETATTR_OPTOUT) != 0)
101 * This is the size of each individual scratchpad buffer, and the numbers
102 * of various block allocations used within the server.
103 * XXXMLG These should come from a config setting.
105 #define SCRATCHPAD_SIZE 512
107 #define OFFSET_COUNT 4
108 #define RDATA_COUNT 8
109 #define RDATALIST_COUNT 8
110 #define RDATASET_COUNT RDATALIST_COUNT
113 * Text representation of the different items, for message_totext
116 static const char *sectiontext[] = {
123 static const char *updsectiontext[] = {
130 static const char *opcodetext[] = {
149 static const char *rcodetext[] = {
171 * "helper" type, which consists of a block of some type, and is linkable.
172 * For it to work, sizeof(dns_msgblock_t) must be a multiple of the pointer
173 * size, or the allocated elements will not be aligned correctly.
175 struct dns_msgblock {
177 unsigned int remaining;
178 ISC_LINK(dns_msgblock_t) link;
179 }; /* dynamically sized */
181 static inline dns_msgblock_t *
182 msgblock_allocate(isc_mem_t *, unsigned int, unsigned int);
184 #define msgblock_get(block, type) \
185 ((type *)msgblock_internalget(block, sizeof(type)))
188 msgblock_internalget(dns_msgblock_t *, unsigned int);
191 msgblock_reset(dns_msgblock_t *);
194 msgblock_free(isc_mem_t *, dns_msgblock_t *, unsigned int);
197 * Allocate a new dns_msgblock_t, and return a pointer to it. If no memory
198 * is free, return NULL.
200 static inline dns_msgblock_t *
201 msgblock_allocate(isc_mem_t *mctx, unsigned int sizeof_type,
204 dns_msgblock_t *block;
207 length = sizeof(dns_msgblock_t) + (sizeof_type * count);
209 block = isc_mem_get(mctx, length);
213 block->count = count;
214 block->remaining = count;
216 ISC_LINK_INIT(block, link);
222 * Return an element from the msgblock. If no more are available, return
226 msgblock_internalget(dns_msgblock_t *block, unsigned int sizeof_type) {
229 if (block == NULL || block->remaining == 0)
234 ptr = (((unsigned char *)block)
235 + sizeof(dns_msgblock_t)
236 + (sizeof_type * block->remaining));
242 msgblock_reset(dns_msgblock_t *block) {
243 block->remaining = block->count;
247 * Release memory associated with a message block.
250 msgblock_free(isc_mem_t *mctx, dns_msgblock_t *block, unsigned int sizeof_type)
254 length = sizeof(dns_msgblock_t) + (sizeof_type * block->count);
256 isc_mem_put(mctx, block, length);
260 * Allocate a new dynamic buffer, and attach it to this message as the
261 * "current" buffer. (which is always the last on the list, for our
264 static inline isc_result_t
265 newbuffer(dns_message_t *msg, unsigned int size) {
267 isc_buffer_t *dynbuf;
270 result = isc_buffer_allocate(msg->mctx, &dynbuf, size);
271 if (result != ISC_R_SUCCESS)
272 return (ISC_R_NOMEMORY);
274 ISC_LIST_APPEND(msg->scratchpad, dynbuf, link);
275 return (ISC_R_SUCCESS);
278 static inline isc_buffer_t *
279 currentbuffer(dns_message_t *msg) {
280 isc_buffer_t *dynbuf;
282 dynbuf = ISC_LIST_TAIL(msg->scratchpad);
283 INSIST(dynbuf != NULL);
289 releaserdata(dns_message_t *msg, dns_rdata_t *rdata) {
290 ISC_LIST_PREPEND(msg->freerdata, rdata, link);
293 static inline dns_rdata_t *
294 newrdata(dns_message_t *msg) {
295 dns_msgblock_t *msgblock;
298 rdata = ISC_LIST_HEAD(msg->freerdata);
300 ISC_LIST_UNLINK(msg->freerdata, rdata, link);
304 msgblock = ISC_LIST_TAIL(msg->rdatas);
305 rdata = msgblock_get(msgblock, dns_rdata_t);
307 msgblock = msgblock_allocate(msg->mctx, sizeof(dns_rdata_t),
309 if (msgblock == NULL)
312 ISC_LIST_APPEND(msg->rdatas, msgblock, link);
314 rdata = msgblock_get(msgblock, dns_rdata_t);
317 dns_rdata_init(rdata);
322 releaserdatalist(dns_message_t *msg, dns_rdatalist_t *rdatalist) {
323 ISC_LIST_PREPEND(msg->freerdatalist, rdatalist, link);
326 static inline dns_rdatalist_t *
327 newrdatalist(dns_message_t *msg) {
328 dns_msgblock_t *msgblock;
329 dns_rdatalist_t *rdatalist;
331 rdatalist = ISC_LIST_HEAD(msg->freerdatalist);
332 if (rdatalist != NULL) {
333 ISC_LIST_UNLINK(msg->freerdatalist, rdatalist, link);
337 msgblock = ISC_LIST_TAIL(msg->rdatalists);
338 rdatalist = msgblock_get(msgblock, dns_rdatalist_t);
339 if (rdatalist == NULL) {
340 msgblock = msgblock_allocate(msg->mctx,
341 sizeof(dns_rdatalist_t),
343 if (msgblock == NULL)
346 ISC_LIST_APPEND(msg->rdatalists, msgblock, link);
348 rdatalist = msgblock_get(msgblock, dns_rdatalist_t);
354 static inline dns_offsets_t *
355 newoffsets(dns_message_t *msg) {
356 dns_msgblock_t *msgblock;
357 dns_offsets_t *offsets;
359 msgblock = ISC_LIST_TAIL(msg->offsets);
360 offsets = msgblock_get(msgblock, dns_offsets_t);
361 if (offsets == NULL) {
362 msgblock = msgblock_allocate(msg->mctx,
363 sizeof(dns_offsets_t),
365 if (msgblock == NULL)
368 ISC_LIST_APPEND(msg->offsets, msgblock, link);
370 offsets = msgblock_get(msgblock, dns_offsets_t);
377 msginitheader(dns_message_t *m) {
386 msginitprivate(dns_message_t *m) {
389 for (i = 0; i < DNS_SECTION_MAX; i++) {
390 m->cursors[i] = NULL;
398 m->state = DNS_SECTION_ANY; /* indicate nothing parsed or rendered */
406 msginittsig(dns_message_t *m) {
407 m->tsigstatus = dns_rcode_noerror;
408 m->querytsigstatus = dns_rcode_noerror;
413 m->sig0status = dns_rcode_noerror;
418 * Init elements to default state. Used both when allocating a new element
419 * and when resetting one.
422 msginit(dns_message_t *m) {
428 m->tcp_continuation = 0;
430 m->verify_attempted = 0;
433 m->query.base = NULL;
436 m->saved.base = NULL;
443 msgresetnames(dns_message_t *msg, unsigned int first_section) {
445 dns_name_t *name, *next_name;
446 dns_rdataset_t *rds, *next_rds;
449 * Clean up name lists by calling the rdataset disassociate function.
451 for (i = first_section; i < DNS_SECTION_MAX; i++) {
452 name = ISC_LIST_HEAD(msg->sections[i]);
453 while (name != NULL) {
454 next_name = ISC_LIST_NEXT(name, link);
455 ISC_LIST_UNLINK(msg->sections[i], name, link);
457 rds = ISC_LIST_HEAD(name->list);
458 while (rds != NULL) {
459 next_rds = ISC_LIST_NEXT(rds, link);
460 ISC_LIST_UNLINK(name->list, rds, link);
462 INSIST(dns_rdataset_isassociated(rds));
463 dns_rdataset_disassociate(rds);
464 isc_mempool_put(msg->rdspool, rds);
467 if (dns_name_dynamic(name))
468 dns_name_free(name, msg->mctx);
469 isc_mempool_put(msg->namepool, name);
476 msgresetopt(dns_message_t *msg)
478 if (msg->opt != NULL) {
479 if (msg->opt_reserved > 0) {
480 dns_message_renderrelease(msg, msg->opt_reserved);
481 msg->opt_reserved = 0;
483 INSIST(dns_rdataset_isassociated(msg->opt));
484 dns_rdataset_disassociate(msg->opt);
485 isc_mempool_put(msg->rdspool, msg->opt);
491 msgresetsigs(dns_message_t *msg, isc_boolean_t replying) {
492 if (msg->sig_reserved > 0) {
493 dns_message_renderrelease(msg, msg->sig_reserved);
494 msg->sig_reserved = 0;
496 if (msg->tsig != NULL) {
497 INSIST(dns_rdataset_isassociated(msg->tsig));
498 INSIST(msg->namepool != NULL);
500 INSIST(msg->querytsig == NULL);
501 msg->querytsig = msg->tsig;
503 dns_rdataset_disassociate(msg->tsig);
504 isc_mempool_put(msg->rdspool, msg->tsig);
505 if (msg->querytsig != NULL) {
506 dns_rdataset_disassociate(msg->querytsig);
507 isc_mempool_put(msg->rdspool, msg->querytsig);
510 if (dns_name_dynamic(msg->tsigname))
511 dns_name_free(msg->tsigname, msg->mctx);
512 isc_mempool_put(msg->namepool, msg->tsigname);
514 msg->tsigname = NULL;
515 } else if (msg->querytsig != NULL && !replying) {
516 dns_rdataset_disassociate(msg->querytsig);
517 isc_mempool_put(msg->rdspool, msg->querytsig);
518 msg->querytsig = NULL;
520 if (msg->sig0 != NULL) {
521 INSIST(dns_rdataset_isassociated(msg->sig0));
522 dns_rdataset_disassociate(msg->sig0);
523 isc_mempool_put(msg->rdspool, msg->sig0);
524 if (msg->sig0name != NULL) {
525 if (dns_name_dynamic(msg->sig0name))
526 dns_name_free(msg->sig0name, msg->mctx);
527 isc_mempool_put(msg->namepool, msg->sig0name);
530 msg->sig0name = NULL;
535 * Free all but one (or everything) for this message. This is used by
536 * both dns_message_reset() and dns_message_destroy().
539 msgreset(dns_message_t *msg, isc_boolean_t everything) {
540 dns_msgblock_t *msgblock, *next_msgblock;
541 isc_buffer_t *dynbuf, *next_dynbuf;
543 dns_rdatalist_t *rdatalist;
545 msgresetnames(msg, 0);
547 msgresetsigs(msg, ISC_FALSE);
550 * Clean up linked lists.
554 * Run through the free lists, and just unlink anything found there.
555 * The memory isn't lost since these are part of message blocks we
558 rdata = ISC_LIST_HEAD(msg->freerdata);
559 while (rdata != NULL) {
560 ISC_LIST_UNLINK(msg->freerdata, rdata, link);
561 rdata = ISC_LIST_HEAD(msg->freerdata);
563 rdatalist = ISC_LIST_HEAD(msg->freerdatalist);
564 while (rdatalist != NULL) {
565 ISC_LIST_UNLINK(msg->freerdatalist, rdatalist, link);
566 rdatalist = ISC_LIST_HEAD(msg->freerdatalist);
569 dynbuf = ISC_LIST_HEAD(msg->scratchpad);
570 INSIST(dynbuf != NULL);
572 isc_buffer_clear(dynbuf);
573 dynbuf = ISC_LIST_NEXT(dynbuf, link);
575 while (dynbuf != NULL) {
576 next_dynbuf = ISC_LIST_NEXT(dynbuf, link);
577 ISC_LIST_UNLINK(msg->scratchpad, dynbuf, link);
578 isc_buffer_free(&dynbuf);
579 dynbuf = next_dynbuf;
582 msgblock = ISC_LIST_HEAD(msg->rdatas);
583 if (!everything && msgblock != NULL) {
584 msgblock_reset(msgblock);
585 msgblock = ISC_LIST_NEXT(msgblock, link);
587 while (msgblock != NULL) {
588 next_msgblock = ISC_LIST_NEXT(msgblock, link);
589 ISC_LIST_UNLINK(msg->rdatas, msgblock, link);
590 msgblock_free(msg->mctx, msgblock, sizeof(dns_rdata_t));
591 msgblock = next_msgblock;
595 * rdatalists could be empty.
598 msgblock = ISC_LIST_HEAD(msg->rdatalists);
599 if (!everything && msgblock != NULL) {
600 msgblock_reset(msgblock);
601 msgblock = ISC_LIST_NEXT(msgblock, link);
603 while (msgblock != NULL) {
604 next_msgblock = ISC_LIST_NEXT(msgblock, link);
605 ISC_LIST_UNLINK(msg->rdatalists, msgblock, link);
606 msgblock_free(msg->mctx, msgblock, sizeof(dns_rdatalist_t));
607 msgblock = next_msgblock;
610 msgblock = ISC_LIST_HEAD(msg->offsets);
611 if (!everything && msgblock != NULL) {
612 msgblock_reset(msgblock);
613 msgblock = ISC_LIST_NEXT(msgblock, link);
615 while (msgblock != NULL) {
616 next_msgblock = ISC_LIST_NEXT(msgblock, link);
617 ISC_LIST_UNLINK(msg->offsets, msgblock, link);
618 msgblock_free(msg->mctx, msgblock, sizeof(dns_offsets_t));
619 msgblock = next_msgblock;
622 if (msg->tsigkey != NULL) {
623 dns_tsigkey_detach(&msg->tsigkey);
627 if (msg->tsigctx != NULL)
628 dst_context_destroy(&msg->tsigctx);
630 if (msg->query.base != NULL) {
631 if (msg->free_query != 0)
632 isc_mem_put(msg->mctx, msg->query.base,
634 msg->query.base = NULL;
635 msg->query.length = 0;
638 if (msg->saved.base != NULL) {
639 if (msg->free_saved != 0)
640 isc_mem_put(msg->mctx, msg->saved.base,
642 msg->saved.base = NULL;
643 msg->saved.length = 0;
647 * cleanup the buffer cleanup list
649 dynbuf = ISC_LIST_HEAD(msg->cleanup);
650 while (dynbuf != NULL) {
651 next_dynbuf = ISC_LIST_NEXT(dynbuf, link);
652 ISC_LIST_UNLINK(msg->cleanup, dynbuf, link);
653 isc_buffer_free(&dynbuf);
654 dynbuf = next_dynbuf;
658 * Set other bits to normal default values.
663 ENSURE(isc_mempool_getallocated(msg->namepool) == 0);
664 ENSURE(isc_mempool_getallocated(msg->rdspool) == 0);
668 spacefortsig(dns_tsigkey_t *key, int otherlen) {
674 * The space required for an TSIG record is:
676 * n1 bytes for the name
677 * 2 bytes for the type
678 * 2 bytes for the class
679 * 4 bytes for the ttl
680 * 2 bytes for the rdlength
681 * n2 bytes for the algorithm name
682 * 6 bytes for the time signed
683 * 2 bytes for the fudge
684 * 2 bytes for the MAC size
685 * x bytes for the MAC
686 * 2 bytes for the original id
687 * 2 bytes for the error
688 * 2 bytes for the other data length
689 * y bytes for the other data (at most)
690 * ---------------------------------
691 * 26 + n1 + n2 + x + y bytes
694 dns_name_toregion(&key->name, &r1);
695 dns_name_toregion(key->algorithm, &r2);
696 if (key->key == NULL)
699 result = dst_key_sigsize(key->key, &x);
700 if (result != ISC_R_SUCCESS)
703 return (26 + r1.length + r2.length + x + otherlen);
707 dns_message_create(isc_mem_t *mctx, unsigned int intent, dns_message_t **msgp)
711 isc_buffer_t *dynbuf;
714 REQUIRE(mctx != NULL);
715 REQUIRE(msgp != NULL);
716 REQUIRE(*msgp == NULL);
717 REQUIRE(intent == DNS_MESSAGE_INTENTPARSE
718 || intent == DNS_MESSAGE_INTENTRENDER);
720 m = isc_mem_get(mctx, sizeof(dns_message_t));
722 return (ISC_R_NOMEMORY);
725 * No allocations until further notice. Just initialize all lists
726 * and other members that are freed in the cleanup phase here.
729 m->magic = DNS_MESSAGE_MAGIC;
730 m->from_to_wire = intent;
733 for (i = 0; i < DNS_SECTION_MAX; i++)
734 ISC_LIST_INIT(m->sections[i]);
737 ISC_LIST_INIT(m->scratchpad);
738 ISC_LIST_INIT(m->cleanup);
741 ISC_LIST_INIT(m->rdatas);
742 ISC_LIST_INIT(m->rdatalists);
743 ISC_LIST_INIT(m->offsets);
744 ISC_LIST_INIT(m->freerdata);
745 ISC_LIST_INIT(m->freerdatalist);
748 * Ok, it is safe to allocate (and then "goto cleanup" if failure)
751 result = isc_mempool_create(m->mctx, sizeof(dns_name_t), &m->namepool);
752 if (result != ISC_R_SUCCESS)
754 isc_mempool_setfreemax(m->namepool, NAME_COUNT);
755 isc_mempool_setname(m->namepool, "msg:names");
757 result = isc_mempool_create(m->mctx, sizeof(dns_rdataset_t),
759 if (result != ISC_R_SUCCESS)
761 isc_mempool_setfreemax(m->rdspool, NAME_COUNT);
762 isc_mempool_setname(m->rdspool, "msg:rdataset");
765 result = isc_buffer_allocate(mctx, &dynbuf, SCRATCHPAD_SIZE);
766 if (result != ISC_R_SUCCESS)
768 ISC_LIST_APPEND(m->scratchpad, dynbuf, link);
773 return (ISC_R_SUCCESS);
776 * Cleanup for error returns.
779 dynbuf = ISC_LIST_HEAD(m->scratchpad);
780 if (dynbuf != NULL) {
781 ISC_LIST_UNLINK(m->scratchpad, dynbuf, link);
782 isc_buffer_free(&dynbuf);
784 if (m->namepool != NULL)
785 isc_mempool_destroy(&m->namepool);
786 if (m->rdspool != NULL)
787 isc_mempool_destroy(&m->rdspool);
789 isc_mem_put(mctx, m, sizeof(dns_message_t));
791 return (ISC_R_NOMEMORY);
795 dns_message_reset(dns_message_t *msg, unsigned int intent) {
796 REQUIRE(DNS_MESSAGE_VALID(msg));
797 REQUIRE(intent == DNS_MESSAGE_INTENTPARSE
798 || intent == DNS_MESSAGE_INTENTRENDER);
800 msgreset(msg, ISC_FALSE);
801 msg->from_to_wire = intent;
805 dns_message_destroy(dns_message_t **msgp) {
808 REQUIRE(msgp != NULL);
809 REQUIRE(DNS_MESSAGE_VALID(*msgp));
814 msgreset(msg, ISC_TRUE);
815 isc_mempool_destroy(&msg->namepool);
816 isc_mempool_destroy(&msg->rdspool);
818 isc_mem_put(msg->mctx, msg, sizeof(dns_message_t));
822 findname(dns_name_t **foundname, dns_name_t *target,
823 dns_namelist_t *section)
827 for (curr = ISC_LIST_TAIL(*section);
829 curr = ISC_LIST_PREV(curr, link)) {
830 if (dns_name_equal(curr, target)) {
831 if (foundname != NULL)
833 return (ISC_R_SUCCESS);
837 return (ISC_R_NOTFOUND);
841 dns_message_find(dns_name_t *name, dns_rdataclass_t rdclass,
842 dns_rdatatype_t type, dns_rdatatype_t covers,
843 dns_rdataset_t **rdataset)
845 dns_rdataset_t *curr;
847 if (rdataset != NULL) {
848 REQUIRE(*rdataset == NULL);
851 for (curr = ISC_LIST_TAIL(name->list);
853 curr = ISC_LIST_PREV(curr, link)) {
854 if (curr->rdclass == rdclass &&
855 curr->type == type && curr->covers == covers) {
856 if (rdataset != NULL)
858 return (ISC_R_SUCCESS);
862 return (ISC_R_NOTFOUND);
866 dns_message_findtype(dns_name_t *name, dns_rdatatype_t type,
867 dns_rdatatype_t covers, dns_rdataset_t **rdataset)
869 dns_rdataset_t *curr;
871 REQUIRE(name != NULL);
872 if (rdataset != NULL) {
873 REQUIRE(*rdataset == NULL);
876 for (curr = ISC_LIST_TAIL(name->list);
878 curr = ISC_LIST_PREV(curr, link)) {
879 if (curr->type == type && curr->covers == covers) {
880 if (rdataset != NULL)
882 return (ISC_R_SUCCESS);
886 return (ISC_R_NOTFOUND);
890 * Read a name from buffer "source".
893 getname(dns_name_t *name, isc_buffer_t *source, dns_message_t *msg,
894 dns_decompress_t *dctx)
896 isc_buffer_t *scratch;
900 scratch = currentbuffer(msg);
903 * First try: use current buffer.
904 * Second try: allocate a new buffer and use that.
908 result = dns_name_fromwire(name, source, dctx, ISC_FALSE,
911 if (result == ISC_R_NOSPACE) {
914 result = newbuffer(msg, SCRATCHPAD_SIZE);
915 if (result != ISC_R_SUCCESS)
918 scratch = currentbuffer(msg);
919 dns_name_reset(name);
925 INSIST(0); /* Cannot get here... */
926 return (ISC_R_UNEXPECTED);
930 getrdata(isc_buffer_t *source, dns_message_t *msg, dns_decompress_t *dctx,
931 dns_rdataclass_t rdclass, dns_rdatatype_t rdtype,
932 unsigned int rdatalen, dns_rdata_t *rdata)
934 isc_buffer_t *scratch;
937 unsigned int trysize;
939 scratch = currentbuffer(msg);
941 isc_buffer_setactive(source, rdatalen);
944 * First try: use current buffer.
945 * Second try: allocate a new buffer of size
946 * max(SCRATCHPAD_SIZE, 2 * compressed_rdatalen)
947 * (the data will fit if it was not more than 50% compressed)
948 * Subsequent tries: double buffer size on each try.
952 /* XXX possibly change this to a while (tries < 2) loop */
954 result = dns_rdata_fromwire(rdata, rdclass, rdtype,
958 if (result == ISC_R_NOSPACE) {
960 trysize = 2 * rdatalen;
961 if (trysize < SCRATCHPAD_SIZE)
962 trysize = SCRATCHPAD_SIZE;
964 INSIST(trysize != 0);
965 if (trysize >= 65535)
966 return (ISC_R_NOSPACE);
967 /* XXX DNS_R_RRTOOLONG? */
971 result = newbuffer(msg, trysize);
972 if (result != ISC_R_SUCCESS)
975 scratch = currentbuffer(msg);
985 seen_problem = ISC_TRUE; \
987 result = DNS_R_FORMERR; \
993 getquestions(isc_buffer_t *source, dns_message_t *msg, dns_decompress_t *dctx,
994 unsigned int options)
1000 dns_offsets_t *offsets;
1001 dns_rdataset_t *rdataset;
1002 dns_rdatalist_t *rdatalist;
1003 isc_result_t result;
1004 dns_rdatatype_t rdtype;
1005 dns_rdataclass_t rdclass;
1006 dns_namelist_t *section;
1007 isc_boolean_t free_name;
1008 isc_boolean_t best_effort;
1009 isc_boolean_t seen_problem;
1011 section = &msg->sections[DNS_SECTION_QUESTION];
1013 best_effort = ISC_TF(options & DNS_MESSAGEPARSE_BESTEFFORT);
1014 seen_problem = ISC_FALSE;
1020 for (count = 0; count < msg->counts[DNS_SECTION_QUESTION]; count++) {
1021 name = isc_mempool_get(msg->namepool);
1023 return (ISC_R_NOMEMORY);
1024 free_name = ISC_TRUE;
1026 offsets = newoffsets(msg);
1027 if (offsets == NULL) {
1028 result = ISC_R_NOMEMORY;
1031 dns_name_init(name, *offsets);
1034 * Parse the name out of this packet.
1036 isc_buffer_remainingregion(source, &r);
1037 isc_buffer_setactive(source, r.length);
1038 result = getname(name, source, msg, dctx);
1039 if (result != ISC_R_SUCCESS)
1043 * Run through the section, looking to see if this name
1044 * is already there. If it is found, put back the allocated
1045 * name since we no longer need it, and set our name pointer
1046 * to point to the name we found.
1048 result = findname(&name2, name, section);
1051 * If it is the first name in the section, accept it.
1053 * If it is not, but is not the same as the name already
1054 * in the question section, append to the section. Note that
1055 * here in the question section this is illegal, so return
1056 * FORMERR. In the future, check the opcode to see if
1057 * this should be legal or not. In either case we no longer
1058 * need this name pointer.
1060 if (result != ISC_R_SUCCESS) {
1061 if (!ISC_LIST_EMPTY(*section))
1063 ISC_LIST_APPEND(*section, name, link);
1064 free_name = ISC_FALSE;
1066 isc_mempool_put(msg->namepool, name);
1069 free_name = ISC_FALSE;
1073 * Get type and class.
1075 isc_buffer_remainingregion(source, &r);
1077 result = ISC_R_UNEXPECTEDEND;
1080 rdtype = isc_buffer_getuint16(source);
1081 rdclass = isc_buffer_getuint16(source);
1084 * If this class is different than the one we already read,
1087 if (msg->state == DNS_SECTION_ANY) {
1088 msg->state = DNS_SECTION_QUESTION;
1089 msg->rdclass = rdclass;
1090 } else if (msg->rdclass != rdclass)
1094 * Can't ask the same question twice.
1096 result = dns_message_find(name, rdclass, rdtype, 0, NULL);
1097 if (result == ISC_R_SUCCESS)
1101 * Allocate a new rdatalist.
1103 rdatalist = newrdatalist(msg);
1104 if (rdatalist == NULL) {
1105 result = ISC_R_NOMEMORY;
1108 rdataset = isc_mempool_get(msg->rdspool);
1109 if (rdataset == NULL) {
1110 result = ISC_R_NOMEMORY;
1115 * Convert rdatalist to rdataset, and attach the latter to
1118 rdatalist->type = rdtype;
1119 rdatalist->covers = 0;
1120 rdatalist->rdclass = rdclass;
1122 ISC_LIST_INIT(rdatalist->rdata);
1124 dns_rdataset_init(rdataset);
1125 result = dns_rdatalist_tordataset(rdatalist, rdataset);
1126 if (result != ISC_R_SUCCESS)
1129 rdataset->attributes |= DNS_RDATASETATTR_QUESTION;
1131 ISC_LIST_APPEND(name->list, rdataset, link);
1136 return (DNS_R_RECOVERABLE);
1137 return (ISC_R_SUCCESS);
1140 if (rdataset != NULL) {
1141 INSIST(!dns_rdataset_isassociated(rdataset));
1142 isc_mempool_put(msg->rdspool, rdataset);
1145 if (rdatalist != NULL)
1146 isc_mempool_put(msg->rdlpool, rdatalist);
1149 isc_mempool_put(msg->namepool, name);
1154 static isc_boolean_t
1155 update(dns_section_t section, dns_rdataclass_t rdclass) {
1156 if (section == DNS_SECTION_PREREQUISITE)
1157 return (ISC_TF(rdclass == dns_rdataclass_any ||
1158 rdclass == dns_rdataclass_none));
1159 if (section == DNS_SECTION_UPDATE)
1160 return (ISC_TF(rdclass == dns_rdataclass_any));
1165 getsection(isc_buffer_t *source, dns_message_t *msg, dns_decompress_t *dctx,
1166 dns_section_t sectionid, unsigned int options)
1169 unsigned int count, rdatalen;
1172 dns_offsets_t *offsets;
1173 dns_rdataset_t *rdataset;
1174 dns_rdatalist_t *rdatalist;
1175 isc_result_t result;
1176 dns_rdatatype_t rdtype, covers;
1177 dns_rdataclass_t rdclass;
1180 dns_namelist_t *section;
1181 isc_boolean_t free_name, free_rdataset;
1182 isc_boolean_t preserve_order, best_effort, seen_problem;
1183 isc_boolean_t issigzero;
1185 preserve_order = ISC_TF(options & DNS_MESSAGEPARSE_PRESERVEORDER);
1186 best_effort = ISC_TF(options & DNS_MESSAGEPARSE_BESTEFFORT);
1187 seen_problem = ISC_FALSE;
1189 for (count = 0; count < msg->counts[sectionid]; count++) {
1190 int recstart = source->current;
1191 isc_boolean_t skip_name_search, skip_type_search;
1193 section = &msg->sections[sectionid];
1195 skip_name_search = ISC_FALSE;
1196 skip_type_search = ISC_FALSE;
1197 free_name = ISC_FALSE;
1198 free_rdataset = ISC_FALSE;
1200 name = isc_mempool_get(msg->namepool);
1202 return (ISC_R_NOMEMORY);
1203 free_name = ISC_TRUE;
1205 offsets = newoffsets(msg);
1206 if (offsets == NULL) {
1207 result = ISC_R_NOMEMORY;
1210 dns_name_init(name, *offsets);
1213 * Parse the name out of this packet.
1215 isc_buffer_remainingregion(source, &r);
1216 isc_buffer_setactive(source, r.length);
1217 result = getname(name, source, msg, dctx);
1218 if (result != ISC_R_SUCCESS)
1222 * Get type, class, ttl, and rdatalen. Verify that at least
1223 * rdatalen bytes remain. (Some of this is deferred to
1226 isc_buffer_remainingregion(source, &r);
1227 if (r.length < 2 + 2 + 4 + 2) {
1228 result = ISC_R_UNEXPECTEDEND;
1231 rdtype = isc_buffer_getuint16(source);
1232 rdclass = isc_buffer_getuint16(source);
1235 * If there was no question section, we may not yet have
1236 * established a class. Do so now.
1238 if (msg->state == DNS_SECTION_ANY &&
1239 rdtype != dns_rdatatype_opt && /* class is UDP SIZE */
1240 rdtype != dns_rdatatype_tsig && /* class is ANY */
1241 rdtype != dns_rdatatype_tkey) { /* class is undefined */
1242 msg->rdclass = rdclass;
1243 msg->state = DNS_SECTION_QUESTION;
1247 * If this class is different than the one in the question
1250 if (msg->opcode != dns_opcode_update
1251 && rdtype != dns_rdatatype_tsig
1252 && rdtype != dns_rdatatype_opt
1253 && rdtype != dns_rdatatype_dnskey /* in a TKEY query */
1254 && rdtype != dns_rdatatype_sig /* SIG(0) */
1255 && rdtype != dns_rdatatype_tkey /* Win2000 TKEY */
1256 && msg->rdclass != dns_rdataclass_any
1257 && msg->rdclass != rdclass)
1261 * Special type handling for TSIG, OPT, and TKEY.
1263 if (rdtype == dns_rdatatype_tsig) {
1265 * If it is a tsig, verify that it is in the
1266 * additional data section.
1268 if (sectionid != DNS_SECTION_ADDITIONAL ||
1269 rdclass != dns_rdataclass_any ||
1270 count != msg->counts[sectionid] - 1)
1272 msg->sigstart = recstart;
1273 skip_name_search = ISC_TRUE;
1274 skip_type_search = ISC_TRUE;
1275 } else if (rdtype == dns_rdatatype_opt) {
1277 * The name of an OPT record must be ".", it
1278 * must be in the additional data section, and
1279 * it must be the first OPT we've seen.
1281 if (!dns_name_equal(dns_rootname, name) ||
1284 skip_name_search = ISC_TRUE;
1285 skip_type_search = ISC_TRUE;
1286 } else if (rdtype == dns_rdatatype_tkey) {
1288 * A TKEY must be in the additional section if this
1289 * is a query, and the answer section if this is a
1290 * response. Unless it's a Win2000 client.
1292 * Its class is ignored.
1294 dns_section_t tkeysection;
1296 if ((msg->flags & DNS_MESSAGEFLAG_QR) == 0)
1297 tkeysection = DNS_SECTION_ADDITIONAL;
1299 tkeysection = DNS_SECTION_ANSWER;
1300 if (sectionid != tkeysection &&
1301 sectionid != DNS_SECTION_ANSWER)
1306 * ... now get ttl and rdatalen, and check buffer.
1308 ttl = isc_buffer_getuint32(source);
1309 rdatalen = isc_buffer_getuint16(source);
1310 r.length -= (2 + 2 + 4 + 2);
1311 if (r.length < rdatalen) {
1312 result = ISC_R_UNEXPECTEDEND;
1317 * Read the rdata from the wire format. Interpret the
1318 * rdata according to its actual class, even if it had a
1319 * DynDNS meta-class in the packet (unless this is a TSIG).
1320 * Then put the meta-class back into the finished rdata.
1322 rdata = newrdata(msg);
1323 if (rdata == NULL) {
1324 result = ISC_R_NOMEMORY;
1327 if (msg->opcode == dns_opcode_update &&
1328 update(sectionid, rdclass)) {
1329 if (rdatalen != 0) {
1330 result = DNS_R_FORMERR;
1334 * When the rdata is empty, the data pointer is
1335 * never dereferenced, but it must still be non-NULL.
1336 * Casting 1 rather than "" avoids warnings about
1337 * discarding the const attribute of a string,
1338 * for compilers that would warn about such things.
1340 rdata->data = (unsigned char *)1;
1342 rdata->rdclass = rdclass;
1343 rdata->type = rdtype;
1344 rdata->flags = DNS_RDATA_UPDATE;
1345 result = ISC_R_SUCCESS;
1346 } else if (rdclass == dns_rdataclass_none &&
1347 msg->opcode == dns_opcode_update &&
1348 sectionid == DNS_SECTION_UPDATE) {
1349 result = getrdata(source, msg, dctx, msg->rdclass,
1350 rdtype, rdatalen, rdata);
1352 result = getrdata(source, msg, dctx, rdclass,
1353 rdtype, rdatalen, rdata);
1354 if (result != ISC_R_SUCCESS)
1356 rdata->rdclass = rdclass;
1357 issigzero = ISC_FALSE;
1358 if (rdtype == dns_rdatatype_rrsig &&
1359 rdata->flags == 0) {
1360 covers = dns_rdata_covers(rdata);
1363 } else if (rdtype == dns_rdatatype_sig /* SIG(0) */ &&
1364 rdata->flags == 0) {
1365 covers = dns_rdata_covers(rdata);
1367 if (sectionid != DNS_SECTION_ADDITIONAL ||
1368 count != msg->counts[sectionid] - 1)
1370 msg->sigstart = recstart;
1371 skip_name_search = ISC_TRUE;
1372 skip_type_search = ISC_TRUE;
1373 issigzero = ISC_TRUE;
1379 * If we are doing a dynamic update or this is a meta-type,
1380 * don't bother searching for a name, just append this one
1381 * to the end of the message.
1383 if (preserve_order || msg->opcode == dns_opcode_update ||
1385 if (rdtype != dns_rdatatype_opt &&
1386 rdtype != dns_rdatatype_tsig &&
1389 ISC_LIST_APPEND(*section, name, link);
1390 free_name = ISC_FALSE;
1394 * Run through the section, looking to see if this name
1395 * is already there. If it is found, put back the
1396 * allocated name since we no longer need it, and set
1397 * our name pointer to point to the name we found.
1399 result = findname(&name2, name, section);
1402 * If it is a new name, append to the section.
1404 if (result == ISC_R_SUCCESS) {
1405 isc_mempool_put(msg->namepool, name);
1408 ISC_LIST_APPEND(*section, name, link);
1410 free_name = ISC_FALSE;
1414 * Search name for the particular type and class.
1415 * Skip this stage if in update mode or this is a meta-type.
1417 if (preserve_order || msg->opcode == dns_opcode_update ||
1419 result = ISC_R_NOTFOUND;
1422 * If this is a type that can only occur in
1423 * the question section, fail.
1425 if (dns_rdatatype_questiononly(rdtype))
1429 result = dns_message_find(name, rdclass, rdtype,
1434 * If we found an rdataset that matches, we need to
1435 * append this rdata to that set. If we did not, we need
1436 * to create a new rdatalist, store the important bits there,
1437 * convert it to an rdataset, and link the latter to the name.
1438 * Yuck. When appending, make certain that the type isn't
1439 * a singleton type, such as SOA or CNAME.
1441 * Note that this check will be bypassed when preserving order,
1442 * the opcode is an update, or the type search is skipped.
1444 if (result == ISC_R_SUCCESS) {
1445 if (dns_rdatatype_issingleton(rdtype))
1449 if (result == ISC_R_NOTFOUND) {
1450 rdataset = isc_mempool_get(msg->rdspool);
1451 if (rdataset == NULL) {
1452 result = ISC_R_NOMEMORY;
1455 free_rdataset = ISC_TRUE;
1457 rdatalist = newrdatalist(msg);
1458 if (rdatalist == NULL) {
1459 result = ISC_R_NOMEMORY;
1463 rdatalist->type = rdtype;
1464 rdatalist->covers = covers;
1465 rdatalist->rdclass = rdclass;
1466 rdatalist->ttl = ttl;
1467 ISC_LIST_INIT(rdatalist->rdata);
1469 dns_rdataset_init(rdataset);
1470 RUNTIME_CHECK(dns_rdatalist_tordataset(rdatalist,
1474 if (rdtype != dns_rdatatype_opt &&
1475 rdtype != dns_rdatatype_tsig &&
1478 ISC_LIST_APPEND(name->list, rdataset, link);
1479 free_rdataset = ISC_FALSE;
1486 * Section 5.2 of RFC2181 says we should drop
1487 * nonauthoritative rrsets where the TTLs differ, but we
1488 * currently treat them the as if they were authoritative and
1491 if (ttl != rdataset->ttl) {
1492 rdataset->attributes |= DNS_RDATASETATTR_TTLADJUSTED;
1493 if (ttl < rdataset->ttl)
1494 rdataset->ttl = ttl;
1497 /* Append this rdata to the rdataset. */
1498 dns_rdatalist_fromrdataset(rdataset, &rdatalist);
1499 ISC_LIST_APPEND(rdatalist->rdata, rdata, link);
1502 * If this is an OPT record, remember it. Also, set
1503 * the extended rcode. Note that msg->opt will only be set
1504 * if best-effort parsing is enabled.
1506 if (rdtype == dns_rdatatype_opt && msg->opt == NULL) {
1509 msg->opt = rdataset;
1511 free_rdataset = ISC_FALSE;
1512 ercode = (dns_rcode_t)
1513 ((msg->opt->ttl & DNS_MESSAGE_EDNSRCODE_MASK)
1515 msg->rcode |= ercode;
1516 isc_mempool_put(msg->namepool, name);
1517 free_name = ISC_FALSE;
1521 * If this is an SIG(0) or TSIG record, remember it. Note
1522 * that msg->sig0 or msg->tsig will only be set if best-effort
1523 * parsing is enabled.
1525 if (issigzero && msg->sig0 == NULL) {
1526 msg->sig0 = rdataset;
1527 msg->sig0name = name;
1529 free_rdataset = ISC_FALSE;
1530 free_name = ISC_FALSE;
1531 } else if (rdtype == dns_rdatatype_tsig && msg->tsig == NULL) {
1532 msg->tsig = rdataset;
1533 msg->tsigname = name;
1535 free_rdataset = ISC_FALSE;
1536 free_name = ISC_FALSE;
1541 isc_mempool_put(msg->namepool, name);
1543 isc_mempool_put(msg->rdspool, rdataset);
1544 free_name = free_rdataset = ISC_FALSE;
1546 INSIST(free_name == ISC_FALSE);
1547 INSIST(free_rdataset == ISC_FALSE);
1551 return (DNS_R_RECOVERABLE);
1552 return (ISC_R_SUCCESS);
1556 isc_mempool_put(msg->namepool, name);
1558 isc_mempool_put(msg->rdspool, rdataset);
1564 dns_message_parse(dns_message_t *msg, isc_buffer_t *source,
1565 unsigned int options)
1568 dns_decompress_t dctx;
1570 isc_uint16_t tmpflags;
1571 isc_buffer_t origsource;
1572 isc_boolean_t seen_problem;
1573 isc_boolean_t ignore_tc;
1575 REQUIRE(DNS_MESSAGE_VALID(msg));
1576 REQUIRE(source != NULL);
1577 REQUIRE(msg->from_to_wire == DNS_MESSAGE_INTENTPARSE);
1579 seen_problem = ISC_FALSE;
1580 ignore_tc = ISC_TF(options & DNS_MESSAGEPARSE_IGNORETRUNCATION);
1582 origsource = *source;
1585 msg->question_ok = 0;
1587 isc_buffer_remainingregion(source, &r);
1588 if (r.length < DNS_MESSAGE_HEADERLEN)
1589 return (ISC_R_UNEXPECTEDEND);
1591 msg->id = isc_buffer_getuint16(source);
1592 tmpflags = isc_buffer_getuint16(source);
1593 msg->opcode = ((tmpflags & DNS_MESSAGE_OPCODE_MASK)
1594 >> DNS_MESSAGE_OPCODE_SHIFT);
1595 msg->rcode = (dns_rcode_t)(tmpflags & DNS_MESSAGE_RCODE_MASK);
1596 msg->flags = (tmpflags & DNS_MESSAGE_FLAG_MASK);
1597 msg->counts[DNS_SECTION_QUESTION] = isc_buffer_getuint16(source);
1598 msg->counts[DNS_SECTION_ANSWER] = isc_buffer_getuint16(source);
1599 msg->counts[DNS_SECTION_AUTHORITY] = isc_buffer_getuint16(source);
1600 msg->counts[DNS_SECTION_ADDITIONAL] = isc_buffer_getuint16(source);
1607 dns_decompress_init(&dctx, -1, DNS_DECOMPRESS_ANY);
1609 dns_decompress_setmethods(&dctx, DNS_COMPRESS_GLOBAL14);
1611 ret = getquestions(source, msg, &dctx, options);
1612 if (ret == ISC_R_UNEXPECTEDEND && ignore_tc)
1614 if (ret == DNS_R_RECOVERABLE) {
1615 seen_problem = ISC_TRUE;
1616 ret = ISC_R_SUCCESS;
1618 if (ret != ISC_R_SUCCESS)
1620 msg->question_ok = 1;
1622 ret = getsection(source, msg, &dctx, DNS_SECTION_ANSWER, options);
1623 if (ret == ISC_R_UNEXPECTEDEND && ignore_tc)
1625 if (ret == DNS_R_RECOVERABLE) {
1626 seen_problem = ISC_TRUE;
1627 ret = ISC_R_SUCCESS;
1629 if (ret != ISC_R_SUCCESS)
1632 ret = getsection(source, msg, &dctx, DNS_SECTION_AUTHORITY, options);
1633 if (ret == ISC_R_UNEXPECTEDEND && ignore_tc)
1635 if (ret == DNS_R_RECOVERABLE) {
1636 seen_problem = ISC_TRUE;
1637 ret = ISC_R_SUCCESS;
1639 if (ret != ISC_R_SUCCESS)
1642 ret = getsection(source, msg, &dctx, DNS_SECTION_ADDITIONAL, options);
1643 if (ret == ISC_R_UNEXPECTEDEND && ignore_tc)
1645 if (ret == DNS_R_RECOVERABLE) {
1646 seen_problem = ISC_TRUE;
1647 ret = ISC_R_SUCCESS;
1649 if (ret != ISC_R_SUCCESS)
1652 isc_buffer_remainingregion(source, &r);
1653 if (r.length != 0) {
1654 isc_log_write(dns_lctx, ISC_LOGCATEGORY_GENERAL,
1655 DNS_LOGMODULE_MESSAGE, ISC_LOG_DEBUG(3),
1656 "message has %u byte(s) of trailing garbage",
1661 if ((options & DNS_MESSAGEPARSE_CLONEBUFFER) == 0)
1662 isc_buffer_usedregion(&origsource, &msg->saved);
1664 msg->saved.length = isc_buffer_usedlength(&origsource);
1665 msg->saved.base = isc_mem_get(msg->mctx, msg->saved.length);
1666 if (msg->saved.base == NULL)
1667 return (ISC_R_NOMEMORY);
1668 memcpy(msg->saved.base, isc_buffer_base(&origsource),
1670 msg->free_saved = 1;
1673 if (ret == ISC_R_UNEXPECTEDEND && ignore_tc)
1674 return (DNS_R_RECOVERABLE);
1675 if (seen_problem == ISC_TRUE)
1676 return (DNS_R_RECOVERABLE);
1677 return (ISC_R_SUCCESS);
1681 dns_message_renderbegin(dns_message_t *msg, dns_compress_t *cctx,
1682 isc_buffer_t *buffer)
1686 REQUIRE(DNS_MESSAGE_VALID(msg));
1687 REQUIRE(buffer != NULL);
1688 REQUIRE(msg->buffer == NULL);
1689 REQUIRE(msg->from_to_wire == DNS_MESSAGE_INTENTRENDER);
1694 * Erase the contents of this buffer.
1696 isc_buffer_clear(buffer);
1699 * Make certain there is enough for at least the header in this
1702 isc_buffer_availableregion(buffer, &r);
1703 if (r.length < DNS_MESSAGE_HEADERLEN)
1704 return (ISC_R_NOSPACE);
1706 if (r.length < msg->reserved)
1707 return (ISC_R_NOSPACE);
1710 * Reserve enough space for the header in this buffer.
1712 isc_buffer_add(buffer, DNS_MESSAGE_HEADERLEN);
1714 msg->buffer = buffer;
1716 return (ISC_R_SUCCESS);
1720 dns_message_renderchangebuffer(dns_message_t *msg, isc_buffer_t *buffer) {
1723 REQUIRE(DNS_MESSAGE_VALID(msg));
1724 REQUIRE(buffer != NULL);
1725 REQUIRE(msg->buffer != NULL);
1728 * Ensure that the new buffer is empty, and has enough space to
1729 * hold the current contents.
1731 isc_buffer_clear(buffer);
1733 isc_buffer_availableregion(buffer, &rn);
1734 isc_buffer_usedregion(msg->buffer, &r);
1735 REQUIRE(rn.length > r.length);
1738 * Copy the contents from the old to the new buffer.
1740 isc_buffer_add(buffer, r.length);
1741 memcpy(rn.base, r.base, r.length);
1743 msg->buffer = buffer;
1745 return (ISC_R_SUCCESS);
1749 dns_message_renderrelease(dns_message_t *msg, unsigned int space) {
1750 REQUIRE(DNS_MESSAGE_VALID(msg));
1751 REQUIRE(space <= msg->reserved);
1753 msg->reserved -= space;
1757 dns_message_renderreserve(dns_message_t *msg, unsigned int space) {
1760 REQUIRE(DNS_MESSAGE_VALID(msg));
1762 if (msg->buffer != NULL) {
1763 isc_buffer_availableregion(msg->buffer, &r);
1764 if (r.length < (space + msg->reserved))
1765 return (ISC_R_NOSPACE);
1768 msg->reserved += space;
1770 return (ISC_R_SUCCESS);
1773 static inline isc_boolean_t
1774 wrong_priority(dns_rdataset_t *rds, int pass, dns_rdatatype_t preferred_glue) {
1778 * If we are not rendering class IN, this ordering is bogus.
1780 if (rds->rdclass != dns_rdataclass_in)
1783 switch (rds->type) {
1784 case dns_rdatatype_a:
1785 case dns_rdatatype_aaaa:
1786 if (preferred_glue == rds->type)
1791 case dns_rdatatype_rrsig:
1792 case dns_rdatatype_dnskey:
1799 if (pass_needed >= pass)
1806 dns_message_rendersection(dns_message_t *msg, dns_section_t sectionid,
1807 unsigned int options)
1809 dns_namelist_t *section;
1810 dns_name_t *name, *next_name;
1811 dns_rdataset_t *rdataset, *next_rdataset;
1812 unsigned int count, total;
1813 isc_result_t result;
1814 isc_buffer_t st; /* for rollbacks */
1816 isc_boolean_t partial = ISC_FALSE;
1817 unsigned int rd_options;
1818 dns_rdatatype_t preferred_glue = 0;
1820 REQUIRE(DNS_MESSAGE_VALID(msg));
1821 REQUIRE(msg->buffer != NULL);
1822 REQUIRE(VALID_NAMED_SECTION(sectionid));
1824 section = &msg->sections[sectionid];
1826 if ((sectionid == DNS_SECTION_ADDITIONAL)
1827 && (options & DNS_MESSAGERENDER_ORDERED) == 0) {
1828 if ((options & DNS_MESSAGERENDER_PREFER_A) != 0) {
1829 preferred_glue = dns_rdatatype_a;
1831 } else if ((options & DNS_MESSAGERENDER_PREFER_AAAA) != 0) {
1832 preferred_glue = dns_rdatatype_aaaa;
1839 if ((options & DNS_MESSAGERENDER_OMITDNSSEC) == 0)
1842 rd_options = DNS_RDATASETTOWIRE_OMITDNSSEC;
1845 * Shrink the space in the buffer by the reserved amount.
1847 msg->buffer->length -= msg->reserved;
1850 if (msg->reserved == 0 && (options & DNS_MESSAGERENDER_PARTIAL) != 0)
1854 * Render required glue first. Set TC if it won't fit.
1856 name = ISC_LIST_HEAD(*section);
1858 rdataset = ISC_LIST_HEAD(name->list);
1859 if (rdataset != NULL &&
1860 (rdataset->attributes & DNS_RDATASETATTR_REQUIREDGLUE) != 0 &&
1861 (rdataset->attributes & DNS_RDATASETATTR_RENDERED) == 0) {
1862 const void *order_arg = msg->order_arg;
1863 st = *(msg->buffer);
1866 result = dns_rdataset_towirepartial(rdataset,
1876 result = dns_rdataset_towiresorted(rdataset,
1885 if (partial && result == ISC_R_NOSPACE) {
1886 msg->flags |= DNS_MESSAGEFLAG_TC;
1887 msg->buffer->length += msg->reserved;
1888 msg->counts[sectionid] += total;
1891 if (result == ISC_R_NOSPACE)
1892 msg->flags |= DNS_MESSAGEFLAG_TC;
1893 if (result != ISC_R_SUCCESS) {
1894 INSIST(st.used < 65536);
1895 dns_compress_rollback(msg->cctx,
1896 (isc_uint16_t)st.used);
1897 *(msg->buffer) = st; /* rollback */
1898 msg->buffer->length += msg->reserved;
1899 msg->counts[sectionid] += total;
1902 rdataset->attributes |= DNS_RDATASETATTR_RENDERED;
1907 name = ISC_LIST_HEAD(*section);
1909 msg->buffer->length += msg->reserved;
1910 msg->counts[sectionid] += total;
1911 return (ISC_R_SUCCESS);
1914 while (name != NULL) {
1915 next_name = ISC_LIST_NEXT(name, link);
1917 rdataset = ISC_LIST_HEAD(name->list);
1918 while (rdataset != NULL) {
1919 next_rdataset = ISC_LIST_NEXT(rdataset, link);
1921 if ((rdataset->attributes &
1922 DNS_RDATASETATTR_RENDERED) != 0)
1925 if (((options & DNS_MESSAGERENDER_ORDERED)
1927 && (sectionid == DNS_SECTION_ADDITIONAL)
1928 && wrong_priority(rdataset, pass,
1932 st = *(msg->buffer);
1936 result = dns_rdataset_towirepartial(
1947 result = dns_rdataset_towiresorted(
1960 * If out of space, record stats on what we
1961 * rendered so far, and return that status.
1963 * XXXMLG Need to change this when
1964 * dns_rdataset_towire() can render partial
1965 * sets starting at some arbitrary point in the
1966 * set. This will include setting a bit in the
1967 * rdataset to indicate that a partial
1968 * rendering was done, and some state saved
1969 * somewhere (probably in the message struct)
1970 * to indicate where to continue from.
1972 if (partial && result == ISC_R_NOSPACE) {
1973 msg->buffer->length += msg->reserved;
1974 msg->counts[sectionid] += total;
1977 if (result != ISC_R_SUCCESS) {
1978 INSIST(st.used < 65536);
1979 dns_compress_rollback(msg->cctx,
1980 (isc_uint16_t)st.used);
1981 *(msg->buffer) = st; /* rollback */
1982 msg->buffer->length += msg->reserved;
1983 msg->counts[sectionid] += total;
1988 * If we have rendered non-validated data,
1989 * ensure that the AD bit is not set.
1991 if (rdataset->trust != dns_trust_secure &&
1992 (sectionid == DNS_SECTION_ANSWER ||
1993 sectionid == DNS_SECTION_AUTHORITY))
1994 msg->flags &= ~DNS_MESSAGEFLAG_AD;
1995 if (OPTOUT(rdataset))
1996 msg->flags &= ~DNS_MESSAGEFLAG_AD;
1998 rdataset->attributes |=
1999 DNS_RDATASETATTR_RENDERED;
2002 rdataset = next_rdataset;
2007 } while (--pass != 0);
2009 msg->buffer->length += msg->reserved;
2010 msg->counts[sectionid] += total;
2012 return (ISC_R_SUCCESS);
2016 dns_message_renderheader(dns_message_t *msg, isc_buffer_t *target) {
2020 REQUIRE(DNS_MESSAGE_VALID(msg));
2021 REQUIRE(target != NULL);
2023 isc_buffer_availableregion(target, &r);
2024 REQUIRE(r.length >= DNS_MESSAGE_HEADERLEN);
2026 isc_buffer_putuint16(target, msg->id);
2028 tmp = ((msg->opcode << DNS_MESSAGE_OPCODE_SHIFT)
2029 & DNS_MESSAGE_OPCODE_MASK);
2030 tmp |= (msg->rcode & DNS_MESSAGE_RCODE_MASK);
2031 tmp |= (msg->flags & DNS_MESSAGE_FLAG_MASK);
2033 INSIST(msg->counts[DNS_SECTION_QUESTION] < 65536 &&
2034 msg->counts[DNS_SECTION_ANSWER] < 65536 &&
2035 msg->counts[DNS_SECTION_AUTHORITY] < 65536 &&
2036 msg->counts[DNS_SECTION_ADDITIONAL] < 65536);
2038 isc_buffer_putuint16(target, tmp);
2039 isc_buffer_putuint16(target,
2040 (isc_uint16_t)msg->counts[DNS_SECTION_QUESTION]);
2041 isc_buffer_putuint16(target,
2042 (isc_uint16_t)msg->counts[DNS_SECTION_ANSWER]);
2043 isc_buffer_putuint16(target,
2044 (isc_uint16_t)msg->counts[DNS_SECTION_AUTHORITY]);
2045 isc_buffer_putuint16(target,
2046 (isc_uint16_t)msg->counts[DNS_SECTION_ADDITIONAL]);
2050 dns_message_renderend(dns_message_t *msg) {
2051 isc_buffer_t tmpbuf;
2056 REQUIRE(DNS_MESSAGE_VALID(msg));
2057 REQUIRE(msg->buffer != NULL);
2059 if ((msg->rcode & ~DNS_MESSAGE_RCODE_MASK) != 0 && msg->opt == NULL) {
2061 * We have an extended rcode but are not using EDNS.
2063 return (DNS_R_FORMERR);
2067 * If we've got an OPT record, render it.
2069 if (msg->opt != NULL) {
2070 dns_message_renderrelease(msg, msg->opt_reserved);
2071 msg->opt_reserved = 0;
2073 * Set the extended rcode.
2075 msg->opt->ttl &= ~DNS_MESSAGE_EDNSRCODE_MASK;
2076 msg->opt->ttl |= ((msg->rcode << 20) &
2077 DNS_MESSAGE_EDNSRCODE_MASK);
2082 result = dns_rdataset_towire(msg->opt, dns_rootname,
2083 msg->cctx, msg->buffer, 0,
2085 msg->counts[DNS_SECTION_ADDITIONAL] += count;
2086 if (result != ISC_R_SUCCESS)
2091 * If we're adding a TSIG or SIG(0) to a truncated message,
2092 * clear all rdatasets from the message except for the question
2093 * before adding the TSIG or SIG(0). If the question doesn't fit,
2096 if ((msg->tsigkey != NULL || msg->sig0key != NULL) &&
2097 (msg->flags & DNS_MESSAGEFLAG_TC) != 0)
2101 msgresetnames(msg, DNS_SECTION_ANSWER);
2103 dns_message_renderreset(msg);
2105 isc_buffer_clear(msg->buffer);
2106 isc_buffer_add(msg->buffer, DNS_MESSAGE_HEADERLEN);
2107 dns_compress_rollback(msg->cctx, 0);
2108 result = dns_message_rendersection(msg, DNS_SECTION_QUESTION,
2110 if (result != ISC_R_SUCCESS && result != ISC_R_NOSPACE)
2115 * If we're adding a TSIG record, generate and render it.
2117 if (msg->tsigkey != NULL) {
2118 dns_message_renderrelease(msg, msg->sig_reserved);
2119 msg->sig_reserved = 0;
2120 result = dns_tsig_sign(msg);
2121 if (result != ISC_R_SUCCESS)
2124 result = dns_rdataset_towire(msg->tsig, msg->tsigname,
2125 msg->cctx, msg->buffer, 0,
2127 msg->counts[DNS_SECTION_ADDITIONAL] += count;
2128 if (result != ISC_R_SUCCESS)
2133 * If we're adding a SIG(0) record, generate and render it.
2135 if (msg->sig0key != NULL) {
2136 dns_message_renderrelease(msg, msg->sig_reserved);
2137 msg->sig_reserved = 0;
2138 result = dns_dnssec_signmessage(msg, msg->sig0key);
2139 if (result != ISC_R_SUCCESS)
2143 * Note: dns_rootname is used here, not msg->sig0name, since
2144 * the owner name of a SIG(0) is irrelevant, and will not
2145 * be set in a message being rendered.
2147 result = dns_rdataset_towire(msg->sig0, dns_rootname,
2148 msg->cctx, msg->buffer, 0,
2150 msg->counts[DNS_SECTION_ADDITIONAL] += count;
2151 if (result != ISC_R_SUCCESS)
2155 isc_buffer_usedregion(msg->buffer, &r);
2156 isc_buffer_init(&tmpbuf, r.base, r.length);
2158 dns_message_renderheader(msg, &tmpbuf);
2160 msg->buffer = NULL; /* forget about this buffer only on success XXX */
2162 return (ISC_R_SUCCESS);
2166 dns_message_renderreset(dns_message_t *msg) {
2169 dns_rdataset_t *rds;
2172 * Reset the message so that it may be rendered again.
2175 REQUIRE(DNS_MESSAGE_VALID(msg));
2176 REQUIRE(msg->from_to_wire == DNS_MESSAGE_INTENTRENDER);
2180 for (i = 0; i < DNS_SECTION_MAX; i++) {
2181 msg->cursors[i] = NULL;
2183 for (name = ISC_LIST_HEAD(msg->sections[i]);
2185 name = ISC_LIST_NEXT(name, link)) {
2186 for (rds = ISC_LIST_HEAD(name->list);
2188 rds = ISC_LIST_NEXT(rds, link)) {
2189 rds->attributes &= ~DNS_RDATASETATTR_RENDERED;
2193 if (msg->tsigname != NULL)
2194 dns_message_puttempname(msg, &msg->tsigname);
2195 if (msg->tsig != NULL) {
2196 dns_rdataset_disassociate(msg->tsig);
2197 dns_message_puttemprdataset(msg, &msg->tsig);
2199 if (msg->sig0 != NULL) {
2200 dns_rdataset_disassociate(msg->sig0);
2201 dns_message_puttemprdataset(msg, &msg->sig0);
2206 dns_message_firstname(dns_message_t *msg, dns_section_t section) {
2207 REQUIRE(DNS_MESSAGE_VALID(msg));
2208 REQUIRE(VALID_NAMED_SECTION(section));
2210 msg->cursors[section] = ISC_LIST_HEAD(msg->sections[section]);
2212 if (msg->cursors[section] == NULL)
2213 return (ISC_R_NOMORE);
2215 return (ISC_R_SUCCESS);
2219 dns_message_nextname(dns_message_t *msg, dns_section_t section) {
2220 REQUIRE(DNS_MESSAGE_VALID(msg));
2221 REQUIRE(VALID_NAMED_SECTION(section));
2222 REQUIRE(msg->cursors[section] != NULL);
2224 msg->cursors[section] = ISC_LIST_NEXT(msg->cursors[section], link);
2226 if (msg->cursors[section] == NULL)
2227 return (ISC_R_NOMORE);
2229 return (ISC_R_SUCCESS);
2233 dns_message_currentname(dns_message_t *msg, dns_section_t section,
2236 REQUIRE(DNS_MESSAGE_VALID(msg));
2237 REQUIRE(VALID_NAMED_SECTION(section));
2238 REQUIRE(name != NULL && *name == NULL);
2239 REQUIRE(msg->cursors[section] != NULL);
2241 *name = msg->cursors[section];
2245 dns_message_findname(dns_message_t *msg, dns_section_t section,
2246 dns_name_t *target, dns_rdatatype_t type,
2247 dns_rdatatype_t covers, dns_name_t **name,
2248 dns_rdataset_t **rdataset)
2250 dns_name_t *foundname;
2251 isc_result_t result;
2254 * XXX These requirements are probably too intensive, especially
2255 * where things can be NULL, but as they are they ensure that if
2256 * something is NON-NULL, indicating that the caller expects it
2257 * to be filled in, that we can in fact fill it in.
2259 REQUIRE(msg != NULL);
2260 REQUIRE(VALID_SECTION(section));
2261 REQUIRE(target != NULL);
2263 REQUIRE(*name == NULL);
2264 if (type == dns_rdatatype_any) {
2265 REQUIRE(rdataset == NULL);
2267 if (rdataset != NULL)
2268 REQUIRE(*rdataset == NULL);
2271 result = findname(&foundname, target,
2272 &msg->sections[section]);
2274 if (result == ISC_R_NOTFOUND)
2275 return (DNS_R_NXDOMAIN);
2276 else if (result != ISC_R_SUCCESS)
2283 * And now look for the type.
2285 if (type == dns_rdatatype_any)
2286 return (ISC_R_SUCCESS);
2288 result = dns_message_findtype(foundname, type, covers, rdataset);
2289 if (result == ISC_R_NOTFOUND)
2290 return (DNS_R_NXRRSET);
2296 dns_message_movename(dns_message_t *msg, dns_name_t *name,
2297 dns_section_t fromsection,
2298 dns_section_t tosection)
2300 REQUIRE(msg != NULL);
2301 REQUIRE(msg->from_to_wire == DNS_MESSAGE_INTENTRENDER);
2302 REQUIRE(name != NULL);
2303 REQUIRE(VALID_NAMED_SECTION(fromsection));
2304 REQUIRE(VALID_NAMED_SECTION(tosection));
2307 * Unlink the name from the old section
2309 ISC_LIST_UNLINK(msg->sections[fromsection], name, link);
2310 ISC_LIST_APPEND(msg->sections[tosection], name, link);
2314 dns_message_addname(dns_message_t *msg, dns_name_t *name,
2315 dns_section_t section)
2317 REQUIRE(msg != NULL);
2318 REQUIRE(msg->from_to_wire == DNS_MESSAGE_INTENTRENDER);
2319 REQUIRE(name != NULL);
2320 REQUIRE(VALID_NAMED_SECTION(section));
2322 ISC_LIST_APPEND(msg->sections[section], name, link);
2326 dns_message_removename(dns_message_t *msg, dns_name_t *name,
2327 dns_section_t section)
2329 REQUIRE(msg != NULL);
2330 REQUIRE(msg->from_to_wire == DNS_MESSAGE_INTENTRENDER);
2331 REQUIRE(name != NULL);
2332 REQUIRE(VALID_NAMED_SECTION(section));
2334 ISC_LIST_UNLINK(msg->sections[section], name, link);
2338 dns_message_gettempname(dns_message_t *msg, dns_name_t **item) {
2339 REQUIRE(DNS_MESSAGE_VALID(msg));
2340 REQUIRE(item != NULL && *item == NULL);
2342 *item = isc_mempool_get(msg->namepool);
2344 return (ISC_R_NOMEMORY);
2345 dns_name_init(*item, NULL);
2347 return (ISC_R_SUCCESS);
2351 dns_message_gettempoffsets(dns_message_t *msg, dns_offsets_t **item) {
2352 REQUIRE(DNS_MESSAGE_VALID(msg));
2353 REQUIRE(item != NULL && *item == NULL);
2355 *item = newoffsets(msg);
2357 return (ISC_R_NOMEMORY);
2359 return (ISC_R_SUCCESS);
2363 dns_message_gettemprdata(dns_message_t *msg, dns_rdata_t **item) {
2364 REQUIRE(DNS_MESSAGE_VALID(msg));
2365 REQUIRE(item != NULL && *item == NULL);
2367 *item = newrdata(msg);
2369 return (ISC_R_NOMEMORY);
2371 return (ISC_R_SUCCESS);
2375 dns_message_gettemprdataset(dns_message_t *msg, dns_rdataset_t **item) {
2376 REQUIRE(DNS_MESSAGE_VALID(msg));
2377 REQUIRE(item != NULL && *item == NULL);
2379 *item = isc_mempool_get(msg->rdspool);
2381 return (ISC_R_NOMEMORY);
2383 dns_rdataset_init(*item);
2385 return (ISC_R_SUCCESS);
2389 dns_message_gettemprdatalist(dns_message_t *msg, dns_rdatalist_t **item) {
2390 REQUIRE(DNS_MESSAGE_VALID(msg));
2391 REQUIRE(item != NULL && *item == NULL);
2393 *item = newrdatalist(msg);
2395 return (ISC_R_NOMEMORY);
2397 return (ISC_R_SUCCESS);
2401 dns_message_puttempname(dns_message_t *msg, dns_name_t **item) {
2402 REQUIRE(DNS_MESSAGE_VALID(msg));
2403 REQUIRE(item != NULL && *item != NULL);
2405 if (dns_name_dynamic(*item))
2406 dns_name_free(*item, msg->mctx);
2407 isc_mempool_put(msg->namepool, *item);
2412 dns_message_puttemprdata(dns_message_t *msg, dns_rdata_t **item) {
2413 REQUIRE(DNS_MESSAGE_VALID(msg));
2414 REQUIRE(item != NULL && *item != NULL);
2416 releaserdata(msg, *item);
2421 dns_message_puttemprdataset(dns_message_t *msg, dns_rdataset_t **item) {
2422 REQUIRE(DNS_MESSAGE_VALID(msg));
2423 REQUIRE(item != NULL && *item != NULL);
2425 REQUIRE(!dns_rdataset_isassociated(*item));
2426 isc_mempool_put(msg->rdspool, *item);
2431 dns_message_puttemprdatalist(dns_message_t *msg, dns_rdatalist_t **item) {
2432 REQUIRE(DNS_MESSAGE_VALID(msg));
2433 REQUIRE(item != NULL && *item != NULL);
2435 releaserdatalist(msg, *item);
2440 dns_message_peekheader(isc_buffer_t *source, dns_messageid_t *idp,
2441 unsigned int *flagsp)
2444 isc_buffer_t buffer;
2448 REQUIRE(source != NULL);
2452 isc_buffer_remainingregion(&buffer, &r);
2453 if (r.length < DNS_MESSAGE_HEADERLEN)
2454 return (ISC_R_UNEXPECTEDEND);
2456 id = isc_buffer_getuint16(&buffer);
2457 flags = isc_buffer_getuint16(&buffer);
2458 flags &= DNS_MESSAGE_FLAG_MASK;
2465 return (ISC_R_SUCCESS);
2469 dns_message_reply(dns_message_t *msg, isc_boolean_t want_question_section) {
2470 unsigned int first_section;
2471 isc_result_t result;
2473 REQUIRE(DNS_MESSAGE_VALID(msg));
2474 REQUIRE((msg->flags & DNS_MESSAGEFLAG_QR) == 0);
2476 if (!msg->header_ok)
2477 return (DNS_R_FORMERR);
2478 if (msg->opcode != dns_opcode_query &&
2479 msg->opcode != dns_opcode_notify)
2480 want_question_section = ISC_FALSE;
2481 if (want_question_section) {
2482 if (!msg->question_ok)
2483 return (DNS_R_FORMERR);
2484 first_section = DNS_SECTION_ANSWER;
2486 first_section = DNS_SECTION_QUESTION;
2487 msg->from_to_wire = DNS_MESSAGE_INTENTRENDER;
2488 msgresetnames(msg, first_section);
2490 msgresetsigs(msg, ISC_TRUE);
2491 msginitprivate(msg);
2493 * We now clear most flags and then set QR, ensuring that the
2494 * reply's flags will be in a reasonable state.
2496 msg->flags &= DNS_MESSAGE_REPLYPRESERVE;
2497 msg->flags |= DNS_MESSAGEFLAG_QR;
2500 * This saves the query TSIG status, if the query was signed, and
2501 * reserves space in the reply for the TSIG.
2503 if (msg->tsigkey != NULL) {
2504 unsigned int otherlen = 0;
2505 msg->querytsigstatus = msg->tsigstatus;
2506 msg->tsigstatus = dns_rcode_noerror;
2507 if (msg->querytsigstatus == dns_tsigerror_badtime)
2509 msg->sig_reserved = spacefortsig(msg->tsigkey, otherlen);
2510 result = dns_message_renderreserve(msg, msg->sig_reserved);
2511 if (result != ISC_R_SUCCESS) {
2512 msg->sig_reserved = 0;
2516 if (msg->saved.base != NULL) {
2517 msg->query.base = msg->saved.base;
2518 msg->query.length = msg->saved.length;
2519 msg->free_query = msg->free_saved;
2520 msg->saved.base = NULL;
2521 msg->saved.length = 0;
2522 msg->free_saved = 0;
2525 return (ISC_R_SUCCESS);
2529 dns_message_getopt(dns_message_t *msg) {
2532 * Get the OPT record for 'msg'.
2535 REQUIRE(DNS_MESSAGE_VALID(msg));
2541 dns_message_setopt(dns_message_t *msg, dns_rdataset_t *opt) {
2542 isc_result_t result;
2543 dns_rdata_t rdata = DNS_RDATA_INIT;
2546 * Set the OPT record for 'msg'.
2550 * The space required for an OPT record is:
2552 * 1 byte for the name
2553 * 2 bytes for the type
2554 * 2 bytes for the class
2555 * 4 bytes for the ttl
2556 * 2 bytes for the rdata length
2557 * ---------------------------------
2560 * plus the length of the rdata.
2563 REQUIRE(DNS_MESSAGE_VALID(msg));
2564 REQUIRE(opt->type == dns_rdatatype_opt);
2565 REQUIRE(msg->from_to_wire == DNS_MESSAGE_INTENTRENDER);
2566 REQUIRE(msg->state == DNS_SECTION_ANY);
2570 result = dns_rdataset_first(opt);
2571 if (result != ISC_R_SUCCESS)
2573 dns_rdataset_current(opt, &rdata);
2574 msg->opt_reserved = 11 + rdata.length;
2575 result = dns_message_renderreserve(msg, msg->opt_reserved);
2576 if (result != ISC_R_SUCCESS) {
2577 msg->opt_reserved = 0;
2583 return (ISC_R_SUCCESS);
2586 dns_message_puttemprdataset(msg, &opt);
2592 dns_message_gettsig(dns_message_t *msg, dns_name_t **owner) {
2595 * Get the TSIG record and owner for 'msg'.
2598 REQUIRE(DNS_MESSAGE_VALID(msg));
2599 REQUIRE(owner == NULL || *owner == NULL);
2602 *owner = msg->tsigname;
2607 dns_message_settsigkey(dns_message_t *msg, dns_tsigkey_t *key) {
2608 isc_result_t result;
2611 * Set the TSIG key for 'msg'
2614 REQUIRE(DNS_MESSAGE_VALID(msg));
2615 REQUIRE(msg->state == DNS_SECTION_ANY);
2617 if (key == NULL && msg->tsigkey != NULL) {
2618 if (msg->sig_reserved != 0) {
2619 dns_message_renderrelease(msg, msg->sig_reserved);
2620 msg->sig_reserved = 0;
2622 dns_tsigkey_detach(&msg->tsigkey);
2625 REQUIRE(msg->tsigkey == NULL && msg->sig0key == NULL);
2626 dns_tsigkey_attach(key, &msg->tsigkey);
2627 if (msg->from_to_wire == DNS_MESSAGE_INTENTRENDER) {
2628 msg->sig_reserved = spacefortsig(msg->tsigkey, 0);
2629 result = dns_message_renderreserve(msg,
2631 if (result != ISC_R_SUCCESS) {
2632 dns_tsigkey_detach(&msg->tsigkey);
2633 msg->sig_reserved = 0;
2638 return (ISC_R_SUCCESS);
2642 dns_message_gettsigkey(dns_message_t *msg) {
2645 * Get the TSIG key for 'msg'
2648 REQUIRE(DNS_MESSAGE_VALID(msg));
2650 return (msg->tsigkey);
2654 dns_message_setquerytsig(dns_message_t *msg, isc_buffer_t *querytsig) {
2655 dns_rdata_t *rdata = NULL;
2656 dns_rdatalist_t *list = NULL;
2657 dns_rdataset_t *set = NULL;
2658 isc_buffer_t *buf = NULL;
2660 isc_result_t result;
2662 REQUIRE(DNS_MESSAGE_VALID(msg));
2663 REQUIRE(msg->querytsig == NULL);
2665 if (querytsig == NULL)
2666 return (ISC_R_SUCCESS);
2668 result = dns_message_gettemprdata(msg, &rdata);
2669 if (result != ISC_R_SUCCESS)
2672 result = dns_message_gettemprdatalist(msg, &list);
2673 if (result != ISC_R_SUCCESS)
2675 result = dns_message_gettemprdataset(msg, &set);
2676 if (result != ISC_R_SUCCESS)
2679 isc_buffer_usedregion(querytsig, &r);
2680 result = isc_buffer_allocate(msg->mctx, &buf, r.length);
2681 if (result != ISC_R_SUCCESS)
2683 isc_buffer_putmem(buf, r.base, r.length);
2684 isc_buffer_usedregion(buf, &r);
2685 dns_rdata_init(rdata);
2686 dns_rdata_fromregion(rdata, dns_rdataclass_any, dns_rdatatype_tsig, &r);
2687 dns_message_takebuffer(msg, &buf);
2688 ISC_LIST_INIT(list->rdata);
2689 ISC_LIST_APPEND(list->rdata, rdata, link);
2690 result = dns_rdatalist_tordataset(list, set);
2691 if (result != ISC_R_SUCCESS)
2694 msg->querytsig = set;
2700 dns_message_puttemprdata(msg, &rdata);
2702 dns_message_puttemprdatalist(msg, &list);
2704 dns_message_puttemprdataset(msg, &set);
2705 return (ISC_R_NOMEMORY);
2709 dns_message_getquerytsig(dns_message_t *msg, isc_mem_t *mctx,
2710 isc_buffer_t **querytsig) {
2711 isc_result_t result;
2712 dns_rdata_t rdata = DNS_RDATA_INIT;
2715 REQUIRE(DNS_MESSAGE_VALID(msg));
2716 REQUIRE(mctx != NULL);
2717 REQUIRE(querytsig != NULL && *querytsig == NULL);
2719 if (msg->tsig == NULL)
2720 return (ISC_R_SUCCESS);
2722 result = dns_rdataset_first(msg->tsig);
2723 if (result != ISC_R_SUCCESS)
2725 dns_rdataset_current(msg->tsig, &rdata);
2726 dns_rdata_toregion(&rdata, &r);
2728 result = isc_buffer_allocate(mctx, querytsig, r.length);
2729 if (result != ISC_R_SUCCESS)
2731 isc_buffer_putmem(*querytsig, r.base, r.length);
2732 return (ISC_R_SUCCESS);
2736 dns_message_getsig0(dns_message_t *msg, dns_name_t **owner) {
2739 * Get the SIG(0) record for 'msg'.
2742 REQUIRE(DNS_MESSAGE_VALID(msg));
2743 REQUIRE(owner == NULL || *owner == NULL);
2745 if (msg->sig0 != NULL && owner != NULL) {
2746 /* If dns_message_getsig0 is called on a rendered message
2747 * after the SIG(0) has been applied, we need to return the
2748 * root name, not NULL.
2750 if (msg->sig0name == NULL)
2751 *owner = dns_rootname;
2753 *owner = msg->sig0name;
2759 dns_message_setsig0key(dns_message_t *msg, dst_key_t *key) {
2762 isc_result_t result;
2765 * Set the SIG(0) key for 'msg'
2769 * The space required for an SIG(0) record is:
2771 * 1 byte for the name
2772 * 2 bytes for the type
2773 * 2 bytes for the class
2774 * 4 bytes for the ttl
2775 * 2 bytes for the type covered
2776 * 1 byte for the algorithm
2777 * 1 bytes for the labels
2778 * 4 bytes for the original ttl
2779 * 4 bytes for the signature expiration
2780 * 4 bytes for the signature inception
2781 * 2 bytes for the key tag
2782 * n bytes for the signer's name
2783 * x bytes for the signature
2784 * ---------------------------------
2787 REQUIRE(DNS_MESSAGE_VALID(msg));
2788 REQUIRE(msg->from_to_wire == DNS_MESSAGE_INTENTRENDER);
2789 REQUIRE(msg->state == DNS_SECTION_ANY);
2792 REQUIRE(msg->sig0key == NULL && msg->tsigkey == NULL);
2793 dns_name_toregion(dst_key_name(key), &r);
2794 result = dst_key_sigsize(key, &x);
2795 if (result != ISC_R_SUCCESS) {
2796 msg->sig_reserved = 0;
2799 msg->sig_reserved = 27 + r.length + x;
2800 result = dns_message_renderreserve(msg, msg->sig_reserved);
2801 if (result != ISC_R_SUCCESS) {
2802 msg->sig_reserved = 0;
2807 return (ISC_R_SUCCESS);
2811 dns_message_getsig0key(dns_message_t *msg) {
2814 * Get the SIG(0) key for 'msg'
2817 REQUIRE(DNS_MESSAGE_VALID(msg));
2819 return (msg->sig0key);
2823 dns_message_takebuffer(dns_message_t *msg, isc_buffer_t **buffer) {
2824 REQUIRE(DNS_MESSAGE_VALID(msg));
2825 REQUIRE(buffer != NULL);
2826 REQUIRE(ISC_BUFFER_VALID(*buffer));
2828 ISC_LIST_APPEND(msg->cleanup, *buffer, link);
2833 dns_message_signer(dns_message_t *msg, dns_name_t *signer) {
2834 isc_result_t result = ISC_R_SUCCESS;
2835 dns_rdata_t rdata = DNS_RDATA_INIT;
2837 REQUIRE(DNS_MESSAGE_VALID(msg));
2838 REQUIRE(signer != NULL);
2839 REQUIRE(msg->from_to_wire == DNS_MESSAGE_INTENTPARSE);
2841 if (msg->tsig == NULL && msg->sig0 == NULL)
2842 return (ISC_R_NOTFOUND);
2844 if (msg->verify_attempted == 0)
2845 return (DNS_R_NOTVERIFIEDYET);
2847 if (!dns_name_hasbuffer(signer)) {
2848 isc_buffer_t *dynbuf = NULL;
2849 result = isc_buffer_allocate(msg->mctx, &dynbuf, 512);
2850 if (result != ISC_R_SUCCESS)
2852 dns_name_setbuffer(signer, dynbuf);
2853 dns_message_takebuffer(msg, &dynbuf);
2856 if (msg->sig0 != NULL) {
2857 dns_rdata_sig_t sig;
2859 result = dns_rdataset_first(msg->sig0);
2860 INSIST(result == ISC_R_SUCCESS);
2861 dns_rdataset_current(msg->sig0, &rdata);
2863 result = dns_rdata_tostruct(&rdata, &sig, NULL);
2864 if (result != ISC_R_SUCCESS)
2867 if (msg->verified_sig && msg->sig0status == dns_rcode_noerror)
2868 result = ISC_R_SUCCESS;
2870 result = DNS_R_SIGINVALID;
2871 dns_name_clone(&sig.signer, signer);
2872 dns_rdata_freestruct(&sig);
2874 dns_name_t *identity;
2875 dns_rdata_any_tsig_t tsig;
2877 result = dns_rdataset_first(msg->tsig);
2878 INSIST(result == ISC_R_SUCCESS);
2879 dns_rdataset_current(msg->tsig, &rdata);
2881 result = dns_rdata_tostruct(&rdata, &tsig, NULL);
2882 if (msg->tsigstatus != dns_rcode_noerror)
2883 result = DNS_R_TSIGVERIFYFAILURE;
2884 else if (tsig.error != dns_rcode_noerror)
2885 result = DNS_R_TSIGERRORSET;
2887 result = ISC_R_SUCCESS;
2888 dns_rdata_freestruct(&tsig);
2890 if (msg->tsigkey == NULL) {
2892 * If msg->tsigstatus & tsig.error are both
2893 * dns_rcode_noerror, the message must have been
2894 * verified, which means msg->tsigkey will be
2897 INSIST(result != ISC_R_SUCCESS);
2899 identity = dns_tsigkey_identity(msg->tsigkey);
2900 if (identity == NULL) {
2901 if (result == ISC_R_SUCCESS)
2902 result = DNS_R_NOIDENTITY;
2903 identity = &msg->tsigkey->name;
2905 dns_name_clone(identity, signer);
2913 dns_message_resetsig(dns_message_t *msg) {
2914 REQUIRE(DNS_MESSAGE_VALID(msg));
2915 msg->verified_sig = 0;
2916 msg->verify_attempted = 0;
2917 msg->tsigstatus = dns_rcode_noerror;
2918 msg->sig0status = dns_rcode_noerror;
2919 msg->timeadjust = 0;
2920 if (msg->tsigkey != NULL) {
2921 dns_tsigkey_detach(&msg->tsigkey);
2922 msg->tsigkey = NULL;
2927 dns_message_rechecksig(dns_message_t *msg, dns_view_t *view) {
2928 dns_message_resetsig(msg);
2929 return (dns_message_checksig(msg, view));
2932 #ifdef SKAN_MSG_DEBUG
2934 dns_message_dumpsig(dns_message_t *msg, char *txt1) {
2935 dns_rdata_t querytsigrdata = DNS_RDATA_INIT;
2936 dns_rdata_any_tsig_t querytsig;
2937 isc_result_t result;
2939 if (msg->tsig != NULL) {
2940 result = dns_rdataset_first(msg->tsig);
2941 RUNTIME_CHECK(result == ISC_R_SUCCESS);
2942 dns_rdataset_current(msg->tsig, &querytsigrdata);
2943 result = dns_rdata_tostruct(&querytsigrdata, &querytsig, NULL);
2944 RUNTIME_CHECK(result == ISC_R_SUCCESS);
2945 hexdump(txt1, "TSIG", querytsig.signature,
2949 if (msg->querytsig != NULL) {
2950 result = dns_rdataset_first(msg->querytsig);
2951 RUNTIME_CHECK(result == ISC_R_SUCCESS);
2952 dns_rdataset_current(msg->querytsig, &querytsigrdata);
2953 result = dns_rdata_tostruct(&querytsigrdata, &querytsig, NULL);
2954 RUNTIME_CHECK(result == ISC_R_SUCCESS);
2955 hexdump(txt1, "QUERYTSIG", querytsig.signature,
2962 dns_message_checksig(dns_message_t *msg, dns_view_t *view) {
2963 isc_buffer_t b, msgb;
2965 REQUIRE(DNS_MESSAGE_VALID(msg));
2967 if (msg->tsigkey == NULL && msg->tsig == NULL && msg->sig0 == NULL)
2968 return (ISC_R_SUCCESS);
2970 INSIST(msg->saved.base != NULL);
2971 isc_buffer_init(&msgb, msg->saved.base, msg->saved.length);
2972 isc_buffer_add(&msgb, msg->saved.length);
2973 if (msg->tsigkey != NULL || msg->tsig != NULL) {
2974 #ifdef SKAN_MSG_DEBUG
2975 dns_message_dumpsig(msg, "dns_message_checksig#1");
2978 return (dns_view_checksig(view, &msgb, msg));
2980 return (dns_tsig_verify(&msgb, msg, NULL, NULL));
2982 dns_rdata_t rdata = DNS_RDATA_INIT;
2983 dns_rdata_sig_t sig;
2984 dns_rdataset_t keyset;
2985 isc_result_t result;
2987 result = dns_rdataset_first(msg->sig0);
2988 INSIST(result == ISC_R_SUCCESS);
2989 dns_rdataset_current(msg->sig0, &rdata);
2992 * This can occur when the message is a dynamic update, since
2993 * the rdata length checking is relaxed. This should not
2994 * happen in a well-formed message, since the SIG(0) is only
2995 * looked for in the additional section, and the dynamic update
2996 * meta-records are in the prerequisite and update sections.
2998 if (rdata.length == 0)
2999 return (ISC_R_UNEXPECTEDEND);
3001 result = dns_rdata_tostruct(&rdata, &sig, msg->mctx);
3002 if (result != ISC_R_SUCCESS)
3005 dns_rdataset_init(&keyset);
3007 return (DNS_R_KEYUNAUTHORIZED);
3008 result = dns_view_simplefind(view, &sig.signer,
3009 dns_rdatatype_key /* SIG(0) */,
3010 0, 0, ISC_FALSE, &keyset, NULL);
3012 if (result != ISC_R_SUCCESS) {
3013 /* XXXBEW Should possibly create a fetch here */
3014 result = DNS_R_KEYUNAUTHORIZED;
3016 } else if (keyset.trust < dns_trust_secure) {
3017 /* XXXBEW Should call a validator here */
3018 result = DNS_R_KEYUNAUTHORIZED;
3021 result = dns_rdataset_first(&keyset);
3022 INSIST(result == ISC_R_SUCCESS);
3024 result == ISC_R_SUCCESS;
3025 result = dns_rdataset_next(&keyset))
3027 dst_key_t *key = NULL;
3029 dns_rdata_reset(&rdata);
3030 dns_rdataset_current(&keyset, &rdata);
3031 isc_buffer_init(&b, rdata.data, rdata.length);
3032 isc_buffer_add(&b, rdata.length);
3034 result = dst_key_fromdns(&sig.signer, rdata.rdclass,
3035 &b, view->mctx, &key);
3036 if (result != ISC_R_SUCCESS)
3038 if (dst_key_alg(key) != sig.algorithm ||
3039 dst_key_id(key) != sig.keyid ||
3040 !(dst_key_proto(key) == DNS_KEYPROTO_DNSSEC ||
3041 dst_key_proto(key) == DNS_KEYPROTO_ANY))
3046 result = dns_dnssec_verifymessage(&msgb, msg, key);
3048 if (result == ISC_R_SUCCESS)
3051 if (result == ISC_R_NOMORE)
3052 result = DNS_R_KEYUNAUTHORIZED;
3055 if (dns_rdataset_isassociated(&keyset))
3056 dns_rdataset_disassociate(&keyset);
3057 dns_rdata_freestruct(&sig);
3063 dns_message_sectiontotext(dns_message_t *msg, dns_section_t section,
3064 const dns_master_style_t *style,
3065 dns_messagetextflag_t flags,
3066 isc_buffer_t *target) {
3067 dns_name_t *name, empty_name;
3068 dns_rdataset_t *rdataset;
3069 isc_result_t result;
3071 REQUIRE(DNS_MESSAGE_VALID(msg));
3072 REQUIRE(target != NULL);
3073 REQUIRE(VALID_SECTION(section));
3075 if (ISC_LIST_EMPTY(msg->sections[section]))
3076 return (ISC_R_SUCCESS);
3078 if ((flags & DNS_MESSAGETEXTFLAG_NOCOMMENTS) == 0) {
3079 ADD_STRING(target, ";; ");
3080 if (msg->opcode != dns_opcode_update) {
3081 ADD_STRING(target, sectiontext[section]);
3083 ADD_STRING(target, updsectiontext[section]);
3085 ADD_STRING(target, " SECTION:\n");
3088 dns_name_init(&empty_name, NULL);
3089 result = dns_message_firstname(msg, section);
3090 if (result != ISC_R_SUCCESS) {
3095 dns_message_currentname(msg, section, &name);
3096 for (rdataset = ISC_LIST_HEAD(name->list);
3098 rdataset = ISC_LIST_NEXT(rdataset, link)) {
3099 if (section == DNS_SECTION_QUESTION) {
3100 ADD_STRING(target, ";");
3101 result = dns_master_questiontotext(name,
3106 result = dns_master_rdatasettotext(name,
3111 if (result != ISC_R_SUCCESS)
3114 result = dns_message_nextname(msg, section);
3115 } while (result == ISC_R_SUCCESS);
3116 if ((flags & DNS_MESSAGETEXTFLAG_NOHEADERS) == 0 &&
3117 (flags & DNS_MESSAGETEXTFLAG_NOCOMMENTS) == 0)
3118 ADD_STRING(target, "\n");
3119 if (result == ISC_R_NOMORE)
3120 result = ISC_R_SUCCESS;
3125 dns_message_pseudosectiontotext(dns_message_t *msg,
3126 dns_pseudosection_t section,
3127 const dns_master_style_t *style,
3128 dns_messagetextflag_t flags,
3129 isc_buffer_t *target) {
3130 dns_rdataset_t *ps = NULL;
3131 dns_name_t *name = NULL;
3132 isc_result_t result;
3133 char buf[sizeof("1234567890")];
3136 isc_buffer_t optbuf;
3137 isc_uint16_t optcode, optlen;
3138 unsigned char *optdata;
3140 REQUIRE(DNS_MESSAGE_VALID(msg));
3141 REQUIRE(target != NULL);
3142 REQUIRE(VALID_PSEUDOSECTION(section));
3145 case DNS_PSEUDOSECTION_OPT:
3146 ps = dns_message_getopt(msg);
3148 return (ISC_R_SUCCESS);
3149 if ((flags & DNS_MESSAGETEXTFLAG_NOCOMMENTS) == 0)
3150 ADD_STRING(target, ";; OPT PSEUDOSECTION:\n");
3151 ADD_STRING(target, "; EDNS: version: ");
3152 snprintf(buf, sizeof(buf), "%u",
3153 (unsigned int)((ps->ttl & 0x00ff0000) >> 16));
3154 ADD_STRING(target, buf);
3155 ADD_STRING(target, ", flags:");
3156 if ((ps->ttl & DNS_MESSAGEEXTFLAG_DO) != 0)
3157 ADD_STRING(target, " do");
3158 mbz = ps->ttl & ~DNS_MESSAGEEXTFLAG_DO & 0xffff;
3160 ADD_STRING(target, "; MBZ: ");
3161 snprintf(buf, sizeof(buf), "%.4x ", mbz);
3162 ADD_STRING(target, buf);
3163 ADD_STRING(target, ", udp: ");
3165 ADD_STRING(target, "; udp: ");
3166 snprintf(buf, sizeof(buf), "%u\n", (unsigned int)ps->rdclass);
3167 ADD_STRING(target, buf);
3169 result = dns_rdataset_first(ps);
3170 if (result != ISC_R_SUCCESS)
3171 return (ISC_R_SUCCESS);
3173 /* Print EDNS info, if any */
3174 dns_rdata_init(&rdata);
3175 dns_rdataset_current(ps, &rdata);
3176 if (rdata.length < 4)
3177 return (ISC_R_SUCCESS);
3179 isc_buffer_init(&optbuf, rdata.data, rdata.length);
3180 isc_buffer_add(&optbuf, rdata.length);
3181 optcode = isc_buffer_getuint16(&optbuf);
3182 optlen = isc_buffer_getuint16(&optbuf);
3184 if (optcode == DNS_OPT_NSID) {
3185 ADD_STRING(target, "; NSID");
3187 ADD_STRING(target, "; OPT=");
3188 sprintf(buf, "%u", optcode);
3189 ADD_STRING(target, buf);
3194 ADD_STRING(target, ": ");
3196 optdata = rdata.data + 4;
3197 for (i = 0; i < optlen; i++) {
3198 sprintf(buf, "%02x ", optdata[i]);
3199 ADD_STRING(target, buf);
3201 for (i = 0; i < optlen; i++) {
3202 ADD_STRING(target, " (");
3203 if (isprint(optdata[i]))
3204 isc_buffer_putmem(target, &optdata[i],
3207 isc_buffer_putstr(target, ".");
3208 ADD_STRING(target, ")");
3211 ADD_STRING(target, "\n");
3212 return (ISC_R_SUCCESS);
3213 case DNS_PSEUDOSECTION_TSIG:
3214 ps = dns_message_gettsig(msg, &name);
3216 return (ISC_R_SUCCESS);
3217 if ((flags & DNS_MESSAGETEXTFLAG_NOCOMMENTS) == 0)
3218 ADD_STRING(target, ";; TSIG PSEUDOSECTION:\n");
3219 result = dns_master_rdatasettotext(name, ps, style, target);
3220 if ((flags & DNS_MESSAGETEXTFLAG_NOHEADERS) == 0 &&
3221 (flags & DNS_MESSAGETEXTFLAG_NOCOMMENTS) == 0)
3222 ADD_STRING(target, "\n");
3224 case DNS_PSEUDOSECTION_SIG0:
3225 ps = dns_message_getsig0(msg, &name);
3227 return (ISC_R_SUCCESS);
3228 if ((flags & DNS_MESSAGETEXTFLAG_NOCOMMENTS) == 0)
3229 ADD_STRING(target, ";; SIG0 PSEUDOSECTION:\n");
3230 result = dns_master_rdatasettotext(name, ps, style, target);
3231 if ((flags & DNS_MESSAGETEXTFLAG_NOHEADERS) == 0 &&
3232 (flags & DNS_MESSAGETEXTFLAG_NOCOMMENTS) == 0)
3233 ADD_STRING(target, "\n");
3236 return (ISC_R_UNEXPECTED);
3240 dns_message_totext(dns_message_t *msg, const dns_master_style_t *style,
3241 dns_messagetextflag_t flags, isc_buffer_t *target) {
3242 char buf[sizeof("1234567890")];
3243 isc_result_t result;
3245 REQUIRE(DNS_MESSAGE_VALID(msg));
3246 REQUIRE(target != NULL);
3248 if ((flags & DNS_MESSAGETEXTFLAG_NOHEADERS) == 0) {
3249 ADD_STRING(target, ";; ->>HEADER<<- opcode: ");
3250 ADD_STRING(target, opcodetext[msg->opcode]);
3251 ADD_STRING(target, ", status: ");
3252 if (msg->rcode < (sizeof(rcodetext)/sizeof(rcodetext[0]))) {
3253 ADD_STRING(target, rcodetext[msg->rcode]);
3255 snprintf(buf, sizeof(buf), "%4u", msg->rcode);
3256 ADD_STRING(target, buf);
3258 ADD_STRING(target, ", id: ");
3259 snprintf(buf, sizeof(buf), "%6u", msg->id);
3260 ADD_STRING(target, buf);
3261 ADD_STRING(target, "\n;; flags: ");
3262 if ((msg->flags & DNS_MESSAGEFLAG_QR) != 0)
3263 ADD_STRING(target, "qr ");
3264 if ((msg->flags & DNS_MESSAGEFLAG_AA) != 0)
3265 ADD_STRING(target, "aa ");
3266 if ((msg->flags & DNS_MESSAGEFLAG_TC) != 0)
3267 ADD_STRING(target, "tc ");
3268 if ((msg->flags & DNS_MESSAGEFLAG_RD) != 0)
3269 ADD_STRING(target, "rd ");
3270 if ((msg->flags & DNS_MESSAGEFLAG_RA) != 0)
3271 ADD_STRING(target, "ra ");
3272 if ((msg->flags & DNS_MESSAGEFLAG_AD) != 0)
3273 ADD_STRING(target, "ad ");
3274 if ((msg->flags & DNS_MESSAGEFLAG_CD) != 0)
3275 ADD_STRING(target, "cd ");
3276 if (msg->opcode != dns_opcode_update) {
3277 ADD_STRING(target, "; QUESTION: ");
3279 ADD_STRING(target, "; ZONE: ");
3281 snprintf(buf, sizeof(buf), "%1u",
3282 msg->counts[DNS_SECTION_QUESTION]);
3283 ADD_STRING(target, buf);
3284 if (msg->opcode != dns_opcode_update) {
3285 ADD_STRING(target, ", ANSWER: ");
3287 ADD_STRING(target, ", PREREQ: ");
3289 snprintf(buf, sizeof(buf), "%1u",
3290 msg->counts[DNS_SECTION_ANSWER]);
3291 ADD_STRING(target, buf);
3292 if (msg->opcode != dns_opcode_update) {
3293 ADD_STRING(target, ", AUTHORITY: ");
3295 ADD_STRING(target, ", UPDATE: ");
3297 snprintf(buf, sizeof(buf), "%1u",
3298 msg->counts[DNS_SECTION_AUTHORITY]);
3299 ADD_STRING(target, buf);
3300 ADD_STRING(target, ", ADDITIONAL: ");
3301 snprintf(buf, sizeof(buf), "%1u",
3302 msg->counts[DNS_SECTION_ADDITIONAL]);
3303 ADD_STRING(target, buf);
3304 ADD_STRING(target, "\n");
3306 result = dns_message_pseudosectiontotext(msg,
3307 DNS_PSEUDOSECTION_OPT,
3308 style, flags, target);
3309 if (result != ISC_R_SUCCESS)
3312 result = dns_message_sectiontotext(msg, DNS_SECTION_QUESTION,
3313 style, flags, target);
3314 if (result != ISC_R_SUCCESS)
3316 result = dns_message_sectiontotext(msg, DNS_SECTION_ANSWER,
3317 style, flags, target);
3318 if (result != ISC_R_SUCCESS)
3320 result = dns_message_sectiontotext(msg, DNS_SECTION_AUTHORITY,
3321 style, flags, target);
3322 if (result != ISC_R_SUCCESS)
3324 result = dns_message_sectiontotext(msg, DNS_SECTION_ADDITIONAL,
3325 style, flags, target);
3326 if (result != ISC_R_SUCCESS)
3329 result = dns_message_pseudosectiontotext(msg,
3330 DNS_PSEUDOSECTION_TSIG,
3331 style, flags, target);
3332 if (result != ISC_R_SUCCESS)
3335 result = dns_message_pseudosectiontotext(msg,
3336 DNS_PSEUDOSECTION_SIG0,
3337 style, flags, target);
3338 if (result != ISC_R_SUCCESS)
3341 return (ISC_R_SUCCESS);
3345 dns_message_getrawmessage(dns_message_t *msg) {
3346 REQUIRE(DNS_MESSAGE_VALID(msg));
3347 return (&msg->saved);
3351 dns_message_setsortorder(dns_message_t *msg, dns_rdatasetorderfunc_t order,
3352 const void *order_arg)
3354 REQUIRE(DNS_MESSAGE_VALID(msg));
3356 msg->order_arg = order_arg;
3360 dns_message_settimeadjust(dns_message_t *msg, int timeadjust) {
3361 REQUIRE(DNS_MESSAGE_VALID(msg));
3362 msg->timeadjust = timeadjust;
3366 dns_message_gettimeadjust(dns_message_t *msg) {
3367 REQUIRE(DNS_MESSAGE_VALID(msg));
3368 return (msg->timeadjust);
3372 dns_opcode_totext(dns_opcode_t opcode, isc_buffer_t *target) {
3374 REQUIRE(opcode < 16);
3376 if (isc_buffer_availablelength(target) < strlen(opcodetext[opcode]))
3377 return (ISC_R_NOSPACE);
3378 isc_buffer_putstr(target, opcodetext[opcode]);
3379 return (ISC_R_SUCCESS);