diff options
Diffstat (limited to 'contrib/bind9/lib/dns/rdataset.c')
| -rw-r--r-- | contrib/bind9/lib/dns/rdataset.c | 802 |
1 files changed, 0 insertions, 802 deletions
diff --git a/contrib/bind9/lib/dns/rdataset.c b/contrib/bind9/lib/dns/rdataset.c deleted file mode 100644 index 026d771..0000000 --- a/contrib/bind9/lib/dns/rdataset.c +++ /dev/null @@ -1,802 +0,0 @@ -/* - * Copyright (C) 2004-2012 Internet Systems Consortium, Inc. ("ISC") - * Copyright (C) 1999-2003 Internet Software Consortium. - * - * Permission to use, copy, modify, and/or distribute this software for any - * purpose with or without fee is hereby granted, provided that the above - * copyright notice and this permission notice appear in all copies. - * - * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH - * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY - * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT, - * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM - * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE - * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR - * PERFORMANCE OF THIS SOFTWARE. - */ - -/* $Id$ */ - -/*! \file */ - -#include <config.h> - -#include <stdlib.h> - -#include <isc/buffer.h> -#include <isc/mem.h> -#include <isc/random.h> -#include <isc/serial.h> -#include <isc/util.h> - -#include <dns/name.h> -#include <dns/ncache.h> -#include <dns/rdata.h> -#include <dns/rdataset.h> -#include <dns/compress.h> - -static const char *trustnames[] = { - "none", - "pending-additional", - "pending-answer", - "additional", - "glue", - "answer", - "authauthority", - "authanswer", - "secure", - "local" /* aka ultimate */ -}; - -const char * -dns_trust_totext(dns_trust_t trust) { - if (trust >= sizeof(trustnames)/sizeof(*trustnames)) - return ("bad"); - return (trustnames[trust]); -} - -void -dns_rdataset_init(dns_rdataset_t *rdataset) { - - /* - * Make 'rdataset' a valid, disassociated rdataset. - */ - - REQUIRE(rdataset != NULL); - - rdataset->magic = DNS_RDATASET_MAGIC; - rdataset->methods = NULL; - ISC_LINK_INIT(rdataset, link); - rdataset->rdclass = 0; - rdataset->type = 0; - rdataset->ttl = 0; - rdataset->trust = 0; - rdataset->covers = 0; - rdataset->attributes = 0; - rdataset->count = ISC_UINT32_MAX; - rdataset->private1 = NULL; - rdataset->private2 = NULL; - rdataset->private3 = NULL; - rdataset->privateuint4 = 0; - rdataset->private5 = NULL; - rdataset->private6 = NULL; - rdataset->resign = 0; -} - -void -dns_rdataset_invalidate(dns_rdataset_t *rdataset) { - - /* - * Invalidate 'rdataset'. - */ - - REQUIRE(DNS_RDATASET_VALID(rdataset)); - REQUIRE(rdataset->methods == NULL); - - rdataset->magic = 0; - ISC_LINK_INIT(rdataset, link); - rdataset->rdclass = 0; - rdataset->type = 0; - rdataset->ttl = 0; - rdataset->trust = 0; - rdataset->covers = 0; - rdataset->attributes = 0; - rdataset->count = ISC_UINT32_MAX; - rdataset->private1 = NULL; - rdataset->private2 = NULL; - rdataset->private3 = NULL; - rdataset->privateuint4 = 0; - rdataset->private5 = NULL; -} - -void -dns_rdataset_disassociate(dns_rdataset_t *rdataset) { - - /* - * Disassociate 'rdataset' from its rdata, allowing it to be reused. - */ - - REQUIRE(DNS_RDATASET_VALID(rdataset)); - REQUIRE(rdataset->methods != NULL); - - (rdataset->methods->disassociate)(rdataset); - rdataset->methods = NULL; - ISC_LINK_INIT(rdataset, link); - rdataset->rdclass = 0; - rdataset->type = 0; - rdataset->ttl = 0; - rdataset->trust = 0; - rdataset->covers = 0; - rdataset->attributes = 0; - rdataset->count = ISC_UINT32_MAX; - rdataset->private1 = NULL; - rdataset->private2 = NULL; - rdataset->private3 = NULL; - rdataset->privateuint4 = 0; - rdataset->private5 = NULL; - rdataset->private6 = NULL; -} - -isc_boolean_t -dns_rdataset_isassociated(dns_rdataset_t *rdataset) { - /* - * Is 'rdataset' associated? - */ - - REQUIRE(DNS_RDATASET_VALID(rdataset)); - - if (rdataset->methods != NULL) - return (ISC_TRUE); - - return (ISC_FALSE); -} - -static void -question_disassociate(dns_rdataset_t *rdataset) { - UNUSED(rdataset); -} - -static isc_result_t -question_cursor(dns_rdataset_t *rdataset) { - UNUSED(rdataset); - - return (ISC_R_NOMORE); -} - -static void -question_current(dns_rdataset_t *rdataset, dns_rdata_t *rdata) { - /* - * This routine should never be called. - */ - UNUSED(rdataset); - UNUSED(rdata); - - REQUIRE(0); -} - -static void -question_clone(dns_rdataset_t *source, dns_rdataset_t *target) { - *target = *source; -} - -static unsigned int -question_count(dns_rdataset_t *rdataset) { - /* - * This routine should never be called. - */ - UNUSED(rdataset); - REQUIRE(0); - - return (0); -} - -static dns_rdatasetmethods_t question_methods = { - question_disassociate, - question_cursor, - question_cursor, - question_current, - question_clone, - question_count, - NULL, - NULL, - NULL, - NULL, - NULL, - NULL, - NULL, - NULL, - NULL -}; - -void -dns_rdataset_makequestion(dns_rdataset_t *rdataset, dns_rdataclass_t rdclass, - dns_rdatatype_t type) -{ - - /* - * Make 'rdataset' a valid, associated, question rdataset, with a - * question class of 'rdclass' and type 'type'. - */ - - REQUIRE(DNS_RDATASET_VALID(rdataset)); - REQUIRE(rdataset->methods == NULL); - - rdataset->methods = &question_methods; - rdataset->rdclass = rdclass; - rdataset->type = type; - rdataset->attributes |= DNS_RDATASETATTR_QUESTION; -} - -unsigned int -dns_rdataset_count(dns_rdataset_t *rdataset) { - - /* - * Return the number of records in 'rdataset'. - */ - - REQUIRE(DNS_RDATASET_VALID(rdataset)); - REQUIRE(rdataset->methods != NULL); - - return ((rdataset->methods->count)(rdataset)); -} - -void -dns_rdataset_clone(dns_rdataset_t *source, dns_rdataset_t *target) { - - /* - * Make 'target' refer to the same rdataset as 'source'. - */ - - REQUIRE(DNS_RDATASET_VALID(source)); - REQUIRE(source->methods != NULL); - REQUIRE(DNS_RDATASET_VALID(target)); - REQUIRE(target->methods == NULL); - - (source->methods->clone)(source, target); -} - -isc_result_t -dns_rdataset_first(dns_rdataset_t *rdataset) { - - /* - * Move the rdata cursor to the first rdata in the rdataset (if any). - */ - - REQUIRE(DNS_RDATASET_VALID(rdataset)); - REQUIRE(rdataset->methods != NULL); - - return ((rdataset->methods->first)(rdataset)); -} - -isc_result_t -dns_rdataset_next(dns_rdataset_t *rdataset) { - - /* - * Move the rdata cursor to the next rdata in the rdataset (if any). - */ - - REQUIRE(DNS_RDATASET_VALID(rdataset)); - REQUIRE(rdataset->methods != NULL); - - return ((rdataset->methods->next)(rdataset)); -} - -void -dns_rdataset_current(dns_rdataset_t *rdataset, dns_rdata_t *rdata) { - - /* - * Make 'rdata' refer to the current rdata. - */ - - REQUIRE(DNS_RDATASET_VALID(rdataset)); - REQUIRE(rdataset->methods != NULL); - - (rdataset->methods->current)(rdataset, rdata); -} - -#define MAX_SHUFFLE 32 -#define WANT_FIXED(r) (((r)->attributes & DNS_RDATASETATTR_FIXEDORDER) != 0) -#define WANT_RANDOM(r) (((r)->attributes & DNS_RDATASETATTR_RANDOMIZE) != 0) - -struct towire_sort { - int key; - dns_rdata_t *rdata; -}; - -static int -towire_compare(const void *av, const void *bv) { - const struct towire_sort *a = (const struct towire_sort *) av; - const struct towire_sort *b = (const struct towire_sort *) bv; - return (a->key - b->key); -} - -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) -{ - dns_rdata_t rdata = DNS_RDATA_INIT; - isc_region_t r; - isc_result_t result; - unsigned int i, count = 0, added, choice; - isc_buffer_t savedbuffer, rdlen, rrbuffer; - unsigned int headlen; - isc_boolean_t question = ISC_FALSE; - isc_boolean_t shuffle = ISC_FALSE; - dns_rdata_t *shuffled = NULL, shuffled_fixed[MAX_SHUFFLE]; - struct towire_sort *sorted = NULL, sorted_fixed[MAX_SHUFFLE]; - - UNUSED(state); - - /* - * Convert 'rdataset' to wire format, compressing names as specified - * in cctx, and storing the result in 'target'. - */ - - REQUIRE(DNS_RDATASET_VALID(rdataset)); - REQUIRE(countp != NULL); - REQUIRE((order == NULL) == (order_arg == NULL)); - REQUIRE(cctx != NULL && cctx->mctx != NULL); - - if ((rdataset->attributes & DNS_RDATASETATTR_QUESTION) != 0) { - question = ISC_TRUE; - count = 1; - result = dns_rdataset_first(rdataset); - INSIST(result == ISC_R_NOMORE); - } else if ((rdataset->attributes & DNS_RDATASETATTR_NEGATIVE) != 0) { - /* - * This is a negative caching rdataset. - */ - unsigned int ncache_opts = 0; - if ((options & DNS_RDATASETTOWIRE_OMITDNSSEC) != 0) - ncache_opts |= DNS_NCACHETOWIRE_OMITDNSSEC; - return (dns_ncache_towire(rdataset, cctx, target, ncache_opts, - countp)); - } else { - count = (rdataset->methods->count)(rdataset); - result = dns_rdataset_first(rdataset); - if (result == ISC_R_NOMORE) - return (ISC_R_SUCCESS); - if (result != ISC_R_SUCCESS) - return (result); - } - - /* - * Do we want to shuffle this answer? - */ - if (!question && count > 1 && - (!WANT_FIXED(rdataset) || order != NULL) && - rdataset->type != dns_rdatatype_rrsig) - shuffle = ISC_TRUE; - - if (shuffle && count > MAX_SHUFFLE) { - shuffled = isc_mem_get(cctx->mctx, count * sizeof(*shuffled)); - sorted = isc_mem_get(cctx->mctx, count * sizeof(*sorted)); - if (shuffled == NULL || sorted == NULL) - shuffle = ISC_FALSE; - } else { - shuffled = shuffled_fixed; - sorted = sorted_fixed; - } - - if (shuffle) { - /* - * First we get handles to all of the rdata. - */ - i = 0; - do { - INSIST(i < count); - dns_rdata_init(&shuffled[i]); - dns_rdataset_current(rdataset, &shuffled[i]); - i++; - result = dns_rdataset_next(rdataset); - } while (result == ISC_R_SUCCESS); - if (result != ISC_R_NOMORE) - goto cleanup; - INSIST(i == count); - - /* - * Now we shuffle. - */ - if (WANT_FIXED(rdataset)) { - /* - * 'Fixed' order. - */ - INSIST(order != NULL); - for (i = 0; i < count; i++) { - sorted[i].key = (*order)(&shuffled[i], - order_arg); - sorted[i].rdata = &shuffled[i]; - } - } else if (WANT_RANDOM(rdataset)) { - /* - * 'Random' order. - */ - for (i = 0; i < count; i++) { - dns_rdata_t rdata; - isc_uint32_t val; - - isc_random_get(&val); - choice = i + (val % (count - i)); - rdata = shuffled[i]; - shuffled[i] = shuffled[choice]; - shuffled[choice] = rdata; - if (order != NULL) - sorted[i].key = (*order)(&shuffled[i], - order_arg); - else - sorted[i].key = 0; /* Unused */ - sorted[i].rdata = &shuffled[i]; - } - } else { - /* - * "Cyclic" order. - */ - isc_uint32_t val; - unsigned int j; - - val = rdataset->count; - if (val == ISC_UINT32_MAX) - isc_random_get(&val); - j = val % count; - for (i = 0; i < count; i++) { - if (order != NULL) - sorted[i].key = (*order)(&shuffled[j], - order_arg); - else - sorted[i].key = 0; /* Unused */ - sorted[i].rdata = &shuffled[j]; - j++; - if (j == count) - j = 0; /* Wrap around. */ - } - } - - /* - * Sorted order. - */ - if (order != NULL) - qsort(sorted, count, sizeof(sorted[0]), - towire_compare); - } - - savedbuffer = *target; - i = 0; - added = 0; - - do { - /* - * Copy out the name, type, class, ttl. - */ - - rrbuffer = *target; - dns_compress_setmethods(cctx, DNS_COMPRESS_GLOBAL14); - result = dns_name_towire(owner_name, cctx, target); - if (result != ISC_R_SUCCESS) - goto rollback; - headlen = sizeof(dns_rdataclass_t) + sizeof(dns_rdatatype_t); - if (!question) - headlen += sizeof(dns_ttl_t) - + 2; /* XXX 2 for rdata len */ - isc_buffer_availableregion(target, &r); - if (r.length < headlen) { - result = ISC_R_NOSPACE; - goto rollback; - } - isc_buffer_putuint16(target, rdataset->type); - isc_buffer_putuint16(target, rdataset->rdclass); - if (!question) { - isc_buffer_putuint32(target, rdataset->ttl); - - /* - * Save space for rdlen. - */ - rdlen = *target; - isc_buffer_add(target, 2); - - /* - * Copy out the rdata - */ - if (shuffle) - rdata = *(sorted[i].rdata); - else { - dns_rdata_reset(&rdata); - dns_rdataset_current(rdataset, &rdata); - } - result = dns_rdata_towire(&rdata, cctx, target); - if (result != ISC_R_SUCCESS) - goto rollback; - INSIST((target->used >= rdlen.used + 2) && - (target->used - rdlen.used - 2 < 65536)); - isc_buffer_putuint16(&rdlen, - (isc_uint16_t)(target->used - - rdlen.used - 2)); - added++; - } - - if (shuffle) { - i++; - if (i == count) - result = ISC_R_NOMORE; - else - result = ISC_R_SUCCESS; - } else { - result = dns_rdataset_next(rdataset); - } - } while (result == ISC_R_SUCCESS); - - if (result != ISC_R_NOMORE) - goto rollback; - - *countp += count; - - result = ISC_R_SUCCESS; - goto cleanup; - - rollback: - if (partial && result == ISC_R_NOSPACE) { - INSIST(rrbuffer.used < 65536); - dns_compress_rollback(cctx, (isc_uint16_t)rrbuffer.used); - *countp += added; - *target = rrbuffer; - goto cleanup; - } - INSIST(savedbuffer.used < 65536); - dns_compress_rollback(cctx, (isc_uint16_t)savedbuffer.used); - *countp = 0; - *target = savedbuffer; - - cleanup: - if (sorted != NULL && sorted != sorted_fixed) - isc_mem_put(cctx->mctx, sorted, count * sizeof(*sorted)); - if (shuffled != NULL && shuffled != shuffled_fixed) - isc_mem_put(cctx->mctx, shuffled, count * sizeof(*shuffled)); - return (result); -} - -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) -{ - return (towiresorted(rdataset, owner_name, cctx, target, - order, order_arg, ISC_FALSE, options, - countp, NULL)); -} - -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) -{ - REQUIRE(state == NULL); /* XXX remove when implemented */ - return (towiresorted(rdataset, owner_name, cctx, target, - order, order_arg, ISC_TRUE, options, - countp, state)); -} - -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) -{ - return (towiresorted(rdataset, owner_name, cctx, target, - NULL, NULL, ISC_FALSE, options, countp, NULL)); -} - -isc_result_t -dns_rdataset_additionaldata(dns_rdataset_t *rdataset, - dns_additionaldatafunc_t add, void *arg) -{ - dns_rdata_t rdata = DNS_RDATA_INIT; - isc_result_t result; - - /* - * For each rdata in rdataset, call 'add' for each name and type in the - * rdata which is subject to additional section processing. - */ - - REQUIRE(DNS_RDATASET_VALID(rdataset)); - REQUIRE((rdataset->attributes & DNS_RDATASETATTR_QUESTION) == 0); - - result = dns_rdataset_first(rdataset); - if (result != ISC_R_SUCCESS) - return (result); - - do { - dns_rdataset_current(rdataset, &rdata); - result = dns_rdata_additionaldata(&rdata, add, arg); - if (result == ISC_R_SUCCESS) - result = dns_rdataset_next(rdataset); - dns_rdata_reset(&rdata); - } while (result == ISC_R_SUCCESS); - - if (result != ISC_R_NOMORE) - return (result); - - return (ISC_R_SUCCESS); -} - -isc_result_t -dns_rdataset_addnoqname(dns_rdataset_t *rdataset, dns_name_t *name) { - - REQUIRE(DNS_RDATASET_VALID(rdataset)); - REQUIRE(rdataset->methods != NULL); - if (rdataset->methods->addnoqname == NULL) - return (ISC_R_NOTIMPLEMENTED); - return((rdataset->methods->addnoqname)(rdataset, name)); -} - -isc_result_t -dns_rdataset_getnoqname(dns_rdataset_t *rdataset, dns_name_t *name, - dns_rdataset_t *neg, dns_rdataset_t *negsig) -{ - REQUIRE(DNS_RDATASET_VALID(rdataset)); - REQUIRE(rdataset->methods != NULL); - - if (rdataset->methods->getnoqname == NULL) - return (ISC_R_NOTIMPLEMENTED); - return((rdataset->methods->getnoqname)(rdataset, name, neg, negsig)); -} - -isc_result_t -dns_rdataset_addclosest(dns_rdataset_t *rdataset, dns_name_t *name) { - - REQUIRE(DNS_RDATASET_VALID(rdataset)); - REQUIRE(rdataset->methods != NULL); - if (rdataset->methods->addclosest == NULL) - return (ISC_R_NOTIMPLEMENTED); - return((rdataset->methods->addclosest)(rdataset, name)); -} - -isc_result_t -dns_rdataset_getclosest(dns_rdataset_t *rdataset, dns_name_t *name, - dns_rdataset_t *neg, dns_rdataset_t *negsig) -{ - REQUIRE(DNS_RDATASET_VALID(rdataset)); - REQUIRE(rdataset->methods != NULL); - - if (rdataset->methods->getclosest == NULL) - return (ISC_R_NOTIMPLEMENTED); - return((rdataset->methods->getclosest)(rdataset, name, neg, negsig)); -} - -/* - * Additional cache stuff - */ -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) -{ - REQUIRE(DNS_RDATASET_VALID(rdataset)); - REQUIRE(rdataset->methods != NULL); - REQUIRE(zonep == NULL || *zonep == NULL); - REQUIRE(dbp != NULL && *dbp == NULL); - REQUIRE(versionp != NULL && *versionp == NULL); - REQUIRE(nodep != NULL && *nodep == NULL); - REQUIRE(fname != NULL); - REQUIRE(msg != NULL); - - if (acache != NULL && rdataset->methods->getadditional != NULL) { - return ((rdataset->methods->getadditional)(rdataset, type, - qtype, acache, - zonep, dbp, - versionp, nodep, - fname, msg, now)); - } - - return (ISC_R_FAILURE); -} - -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) -{ - REQUIRE(DNS_RDATASET_VALID(rdataset)); - REQUIRE(rdataset->methods != NULL); - - if (acache != NULL && rdataset->methods->setadditional != NULL) { - return ((rdataset->methods->setadditional)(rdataset, type, - qtype, acache, zone, - db, version, - node, fname)); - } - - return (ISC_R_FAILURE); -} - -isc_result_t -dns_rdataset_putadditional(dns_acache_t *acache, - dns_rdataset_t *rdataset, - dns_rdatasetadditional_t type, - dns_rdatatype_t qtype) -{ - REQUIRE(DNS_RDATASET_VALID(rdataset)); - REQUIRE(rdataset->methods != NULL); - - if (acache != NULL && rdataset->methods->putadditional != NULL) { - return ((rdataset->methods->putadditional)(acache, rdataset, - type, qtype)); - } - - return (ISC_R_FAILURE); -} - -void -dns_rdataset_settrust(dns_rdataset_t *rdataset, dns_trust_t trust) { - REQUIRE(DNS_RDATASET_VALID(rdataset)); - REQUIRE(rdataset->methods != NULL); - - if (rdataset->methods->settrust != NULL) - (rdataset->methods->settrust)(rdataset, trust); - else - rdataset->trust = trust; -} - -void -dns_rdataset_expire(dns_rdataset_t *rdataset) { - REQUIRE(DNS_RDATASET_VALID(rdataset)); - REQUIRE(rdataset->methods != NULL); - - if (rdataset->methods->expire != NULL) - (rdataset->methods->expire)(rdataset); -} - -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) -{ - isc_uint32_t ttl = 0; - - REQUIRE(DNS_RDATASET_VALID(rdataset)); - REQUIRE(DNS_RDATASET_VALID(sigrdataset)); - REQUIRE(rrsig != NULL); - - /* - * If we accept expired RRsets keep them for no more than 120 seconds. - */ - if (acceptexpired && - (isc_serial_le(rrsig->timeexpire, ((now + 120) & 0xffffffff)) || - isc_serial_le(rrsig->timeexpire, now))) - ttl = 120; - else if (isc_serial_ge(rrsig->timeexpire, now)) - ttl = rrsig->timeexpire - now; - - ttl = ISC_MIN(ISC_MIN(rdataset->ttl, sigrdataset->ttl), - ISC_MIN(rrsig->originalttl, ttl)); - rdataset->ttl = ttl; - sigrdataset->ttl = ttl; -} |
