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-rw-r--r--lib/dns/rdataset.c750
1 files changed, 750 insertions, 0 deletions
diff --git a/lib/dns/rdataset.c b/lib/dns/rdataset.c
new file mode 100644
index 0000000..221d7f8
--- /dev/null
+++ b/lib/dns/rdataset.c
@@ -0,0 +1,750 @@
+/*
+ * Copyright (C) Internet Systems Consortium, Inc. ("ISC")
+ *
+ * SPDX-License-Identifier: MPL-2.0
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, you can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See the COPYRIGHT file distributed with this work for additional
+ * information regarding copyright ownership.
+ */
+
+/*! \file */
+
+#include <inttypes.h>
+#include <stdbool.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/compress.h>
+#include <dns/fixedname.h>
+#include <dns/name.h>
+#include <dns/ncache.h>
+#include <dns/rdata.h>
+#include <dns/rdataset.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]);
+}
+
+#define DNS_RDATASET_COUNT_UNDEFINED UINT32_MAX
+
+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 = DNS_RDATASET_COUNT_UNDEFINED;
+ rdataset->private1 = NULL;
+ rdataset->private2 = NULL;
+ rdataset->private3 = NULL;
+ rdataset->privateuint4 = 0;
+ rdataset->private5 = NULL;
+ rdataset->private6 = NULL;
+ rdataset->private7 = 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 = DNS_RDATASET_COUNT_UNDEFINED;
+ 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 = DNS_RDATASET_COUNT_UNDEFINED;
+ rdataset->private1 = NULL;
+ rdataset->private2 = NULL;
+ rdataset->private3 = NULL;
+ rdataset->privateuint4 = 0;
+ rdataset->private5 = NULL;
+ rdataset->private6 = NULL;
+}
+
+bool
+dns_rdataset_isassociated(dns_rdataset_t *rdataset) {
+ /*
+ * Is 'rdataset' associated?
+ */
+
+ REQUIRE(DNS_RDATASET_VALID(rdataset));
+
+ if (rdataset->methods != NULL) {
+ return (true);
+ }
+
+ return (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, /* addnoqname */
+ NULL, /* getnoqname */
+ NULL, /* addclosest */
+ NULL, /* getclosest */
+ NULL, /* settrust */
+ NULL, /* expire */
+ NULL, /* clearprefetch */
+ NULL, /* setownercase */
+ NULL, /* getownercase */
+ NULL /* addglue */
+};
+
+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)
+#define WANT_CYCLIC(r) (((r)->attributes & DNS_RDATASETATTR_CYCLIC) != 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 void
+swap_rdata(dns_rdata_t *in, unsigned int a, unsigned int b) {
+ dns_rdata_t rdata = in[a];
+ in[a] = in[b];
+ in[b] = rdata;
+}
+
+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, bool partial,
+ unsigned int options, unsigned int *countp, void **state) {
+ isc_region_t r;
+ isc_result_t result;
+ unsigned int i, count = 0, added;
+ isc_buffer_t savedbuffer, rdlen, rrbuffer;
+ unsigned int headlen;
+ bool question = false;
+ bool shuffle = false, sort = false;
+ bool want_random, want_cyclic;
+ dns_rdata_t in_fixed[MAX_SHUFFLE];
+ dns_rdata_t *in = in_fixed;
+ struct towire_sort out_fixed[MAX_SHUFFLE];
+ struct towire_sort *out = out_fixed;
+ dns_fixedname_t fixed;
+ dns_name_t *name;
+ uint16_t offset;
+
+ 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(rdataset->methods != NULL);
+ REQUIRE(countp != NULL);
+ REQUIRE(cctx != NULL && cctx->mctx != NULL);
+
+ want_random = WANT_RANDOM(rdataset);
+ want_cyclic = WANT_CYCLIC(rdataset);
+
+ if ((rdataset->attributes & DNS_RDATASETATTR_QUESTION) != 0) {
+ question = 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 sort and/or shuffle this answer?
+ */
+ if (!question && count > 1 && rdataset->type != dns_rdatatype_rrsig) {
+ if (order != NULL) {
+ sort = true;
+ }
+ if (want_random || want_cyclic) {
+ shuffle = true;
+ }
+ }
+
+ if ((shuffle || sort)) {
+ if (count > MAX_SHUFFLE) {
+ in = isc_mem_get(cctx->mctx, count * sizeof(*in));
+ out = isc_mem_get(cctx->mctx, count * sizeof(*out));
+ if (in == NULL || out == NULL) {
+ shuffle = sort = false;
+ }
+ }
+ }
+
+ if ((shuffle || sort)) {
+ uint32_t seed = 0;
+ unsigned int j = 0;
+
+ /*
+ * First we get handles to all of the rdata.
+ */
+ i = 0;
+ do {
+ INSIST(i < count);
+ dns_rdata_init(&in[i]);
+ dns_rdataset_current(rdataset, &in[i]);
+ i++;
+ result = dns_rdataset_next(rdataset);
+ } while (result == ISC_R_SUCCESS);
+ if (result != ISC_R_NOMORE) {
+ goto cleanup;
+ }
+ INSIST(i == count);
+
+ if (ISC_LIKELY(want_random)) {
+ seed = isc_random32();
+ }
+
+ if (ISC_UNLIKELY(want_cyclic) &&
+ (rdataset->count != DNS_RDATASET_COUNT_UNDEFINED))
+ {
+ j = rdataset->count % count;
+ }
+
+ for (i = 0; i < count; i++) {
+ if (ISC_LIKELY(want_random)) {
+ swap_rdata(in, j, j + seed % (count - j));
+ }
+
+ out[i].key = (sort) ? (*order)(&in[j], order_arg) : 0;
+ out[i].rdata = &in[j];
+ if (++j == count) {
+ j = 0;
+ }
+ }
+ /*
+ * Sortlist order.
+ */
+ if (sort) {
+ qsort(out, count, sizeof(out[0]), towire_compare);
+ }
+ }
+
+ savedbuffer = *target;
+ i = 0;
+ added = 0;
+
+ name = dns_fixedname_initname(&fixed);
+ dns_name_copynf(owner_name, name);
+ dns_rdataset_getownercase(rdataset, name);
+ offset = 0xffff;
+
+ name->attributes |= owner_name->attributes & DNS_NAMEATTR_NOCOMPRESS;
+
+ do {
+ /*
+ * Copy out the name, type, class, ttl.
+ */
+
+ rrbuffer = *target;
+ dns_compress_setmethods(cctx, DNS_COMPRESS_GLOBAL14);
+ result = dns_name_towire2(name, cctx, target, &offset);
+ 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) {
+ dns_rdata_t rdata = DNS_RDATA_INIT;
+
+ isc_buffer_putuint32(target, rdataset->ttl);
+
+ /*
+ * Save space for rdlen.
+ */
+ rdlen = *target;
+ isc_buffer_add(target, 2);
+
+ /*
+ * Copy out the rdata
+ */
+ if (shuffle || sort) {
+ rdata = *(out[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,
+ (uint16_t)(target->used - rdlen.used - 2));
+ added++;
+ }
+
+ if (shuffle || sort) {
+ 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, (uint16_t)rrbuffer.used);
+ *countp += added;
+ *target = rrbuffer;
+ goto cleanup;
+ }
+ INSIST(savedbuffer.used < 65536);
+ dns_compress_rollback(cctx, (uint16_t)savedbuffer.used);
+ *countp = 0;
+ *target = savedbuffer;
+
+cleanup:
+ if (out != NULL && out != out_fixed) {
+ isc_mem_put(cctx->mctx, out, count * sizeof(*out));
+ }
+ if (in != NULL && in != in_fixed) {
+ isc_mem_put(cctx->mctx, in, count * sizeof(*in));
+ }
+ 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, 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, true, options, countp, state));
+}
+
+isc_result_t
+dns_rdataset_towire(dns_rdataset_t *rdataset, const 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,
+ 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, const 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));
+}
+
+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_clearprefetch(dns_rdataset_t *rdataset) {
+ REQUIRE(DNS_RDATASET_VALID(rdataset));
+ REQUIRE(rdataset->methods != NULL);
+
+ if (rdataset->methods->clearprefetch != NULL) {
+ (rdataset->methods->clearprefetch)(rdataset);
+ }
+}
+
+void
+dns_rdataset_setownercase(dns_rdataset_t *rdataset, const dns_name_t *name) {
+ REQUIRE(DNS_RDATASET_VALID(rdataset));
+ REQUIRE(rdataset->methods != NULL);
+
+ if (rdataset->methods->setownercase != NULL) {
+ (rdataset->methods->setownercase)(rdataset, name);
+ }
+}
+
+void
+dns_rdataset_getownercase(const dns_rdataset_t *rdataset, dns_name_t *name) {
+ REQUIRE(DNS_RDATASET_VALID(rdataset));
+ REQUIRE(rdataset->methods != NULL);
+
+ if (rdataset->methods->getownercase != NULL) {
+ (rdataset->methods->getownercase)(rdataset, name);
+ }
+}
+
+void
+dns_rdataset_trimttl(dns_rdataset_t *rdataset, dns_rdataset_t *sigrdataset,
+ dns_rdata_rrsig_t *rrsig, isc_stdtime_t now,
+ bool acceptexpired) {
+ 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;
+}
+
+isc_result_t
+dns_rdataset_addglue(dns_rdataset_t *rdataset, dns_dbversion_t *version,
+ dns_message_t *msg) {
+ REQUIRE(DNS_RDATASET_VALID(rdataset));
+ REQUIRE(rdataset->methods != NULL);
+ REQUIRE(rdataset->type == dns_rdatatype_ns);
+
+ if (rdataset->methods->addglue == NULL) {
+ return (ISC_R_NOTIMPLEMENTED);
+ }
+
+ return ((rdataset->methods->addglue)(rdataset, version, msg));
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-15 19:53:23 +0000