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-rw-r--r--lib/dns/rdata/generic/nsec_47.c290
1 files changed, 290 insertions, 0 deletions
diff --git a/lib/dns/rdata/generic/nsec_47.c b/lib/dns/rdata/generic/nsec_47.c
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+++ b/lib/dns/rdata/generic/nsec_47.c
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+/*
+ * 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.
+ */
+
+/* RFC 3845 */
+
+#ifndef RDATA_GENERIC_NSEC_47_C
+#define RDATA_GENERIC_NSEC_47_C
+
+/*
+ * The attributes do not include DNS_RDATATYPEATTR_SINGLETON
+ * because we must be able to handle a parent/child NSEC pair.
+ */
+#define RRTYPE_NSEC_ATTRIBUTES \
+ (DNS_RDATATYPEATTR_DNSSEC | DNS_RDATATYPEATTR_ZONECUTAUTH | \
+ DNS_RDATATYPEATTR_ATCNAME)
+
+static isc_result_t
+fromtext_nsec(ARGS_FROMTEXT) {
+ isc_token_t token;
+ dns_name_t name;
+ isc_buffer_t buffer;
+
+ REQUIRE(type == dns_rdatatype_nsec);
+
+ UNUSED(type);
+ UNUSED(rdclass);
+ UNUSED(callbacks);
+
+ /*
+ * Next domain.
+ */
+ RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_string,
+ false));
+ dns_name_init(&name, NULL);
+ buffer_fromregion(&buffer, &token.value.as_region);
+ if (origin == NULL) {
+ origin = dns_rootname;
+ }
+ RETTOK(dns_name_fromtext(&name, &buffer, origin, options, target));
+
+ return (typemap_fromtext(lexer, target, false));
+}
+
+static isc_result_t
+totext_nsec(ARGS_TOTEXT) {
+ isc_region_t sr;
+ dns_name_t name;
+
+ REQUIRE(rdata->type == dns_rdatatype_nsec);
+ REQUIRE(rdata->length != 0);
+
+ UNUSED(tctx);
+
+ dns_name_init(&name, NULL);
+ dns_rdata_toregion(rdata, &sr);
+ dns_name_fromregion(&name, &sr);
+ isc_region_consume(&sr, name_length(&name));
+ RETERR(dns_name_totext(&name, false, target));
+ /*
+ * Don't leave a trailing space when there's no typemap present.
+ */
+ if (sr.length > 0) {
+ RETERR(str_totext(" ", target));
+ }
+ return (typemap_totext(&sr, NULL, target));
+}
+
+static isc_result_t
+fromwire_nsec(ARGS_FROMWIRE) {
+ isc_region_t sr;
+ dns_name_t name;
+
+ REQUIRE(type == dns_rdatatype_nsec);
+
+ UNUSED(type);
+ UNUSED(rdclass);
+
+ dns_decompress_setmethods(dctx, DNS_COMPRESS_NONE);
+
+ dns_name_init(&name, NULL);
+ RETERR(dns_name_fromwire(&name, source, dctx, options, target));
+
+ isc_buffer_activeregion(source, &sr);
+ RETERR(typemap_test(&sr, false));
+ RETERR(mem_tobuffer(target, sr.base, sr.length));
+ isc_buffer_forward(source, sr.length);
+ return (ISC_R_SUCCESS);
+}
+
+static isc_result_t
+towire_nsec(ARGS_TOWIRE) {
+ isc_region_t sr;
+ dns_name_t name;
+ dns_offsets_t offsets;
+
+ REQUIRE(rdata->type == dns_rdatatype_nsec);
+ REQUIRE(rdata->length != 0);
+
+ dns_compress_setmethods(cctx, DNS_COMPRESS_NONE);
+ dns_name_init(&name, offsets);
+ dns_rdata_toregion(rdata, &sr);
+ dns_name_fromregion(&name, &sr);
+ isc_region_consume(&sr, name_length(&name));
+ RETERR(dns_name_towire(&name, cctx, target));
+
+ return (mem_tobuffer(target, sr.base, sr.length));
+}
+
+static int
+compare_nsec(ARGS_COMPARE) {
+ isc_region_t r1;
+ isc_region_t r2;
+
+ REQUIRE(rdata1->type == rdata2->type);
+ REQUIRE(rdata1->rdclass == rdata2->rdclass);
+ REQUIRE(rdata1->type == dns_rdatatype_nsec);
+ REQUIRE(rdata1->length != 0);
+ REQUIRE(rdata2->length != 0);
+
+ dns_rdata_toregion(rdata1, &r1);
+ dns_rdata_toregion(rdata2, &r2);
+ return (isc_region_compare(&r1, &r2));
+}
+
+static isc_result_t
+fromstruct_nsec(ARGS_FROMSTRUCT) {
+ dns_rdata_nsec_t *nsec = source;
+ isc_region_t region;
+
+ REQUIRE(type == dns_rdatatype_nsec);
+ REQUIRE(nsec != NULL);
+ REQUIRE(nsec->common.rdtype == type);
+ REQUIRE(nsec->common.rdclass == rdclass);
+ REQUIRE(nsec->typebits != NULL || nsec->len == 0);
+
+ UNUSED(type);
+ UNUSED(rdclass);
+
+ dns_name_toregion(&nsec->next, &region);
+ RETERR(isc_buffer_copyregion(target, &region));
+
+ region.base = nsec->typebits;
+ region.length = nsec->len;
+ RETERR(typemap_test(&region, false));
+ return (mem_tobuffer(target, nsec->typebits, nsec->len));
+}
+
+static isc_result_t
+tostruct_nsec(ARGS_TOSTRUCT) {
+ isc_region_t region;
+ dns_rdata_nsec_t *nsec = target;
+ dns_name_t name;
+
+ REQUIRE(rdata->type == dns_rdatatype_nsec);
+ REQUIRE(nsec != NULL);
+ REQUIRE(rdata->length != 0);
+
+ nsec->common.rdclass = rdata->rdclass;
+ nsec->common.rdtype = rdata->type;
+ ISC_LINK_INIT(&nsec->common, link);
+
+ dns_name_init(&name, NULL);
+ dns_rdata_toregion(rdata, &region);
+ dns_name_fromregion(&name, &region);
+ isc_region_consume(&region, name_length(&name));
+ dns_name_init(&nsec->next, NULL);
+ RETERR(name_duporclone(&name, mctx, &nsec->next));
+
+ nsec->len = region.length;
+ nsec->typebits = mem_maybedup(mctx, region.base, region.length);
+ if (nsec->typebits == NULL) {
+ goto cleanup;
+ }
+
+ nsec->mctx = mctx;
+ return (ISC_R_SUCCESS);
+
+cleanup:
+ if (mctx != NULL) {
+ dns_name_free(&nsec->next, mctx);
+ }
+ return (ISC_R_NOMEMORY);
+}
+
+static void
+freestruct_nsec(ARGS_FREESTRUCT) {
+ dns_rdata_nsec_t *nsec = source;
+
+ REQUIRE(nsec != NULL);
+ REQUIRE(nsec->common.rdtype == dns_rdatatype_nsec);
+
+ if (nsec->mctx == NULL) {
+ return;
+ }
+
+ dns_name_free(&nsec->next, nsec->mctx);
+ if (nsec->typebits != NULL) {
+ isc_mem_free(nsec->mctx, nsec->typebits);
+ }
+ nsec->mctx = NULL;
+}
+
+static isc_result_t
+additionaldata_nsec(ARGS_ADDLDATA) {
+ REQUIRE(rdata->type == dns_rdatatype_nsec);
+
+ UNUSED(rdata);
+ UNUSED(add);
+ UNUSED(arg);
+
+ return (ISC_R_SUCCESS);
+}
+
+static isc_result_t
+digest_nsec(ARGS_DIGEST) {
+ isc_region_t r;
+
+ REQUIRE(rdata->type == dns_rdatatype_nsec);
+
+ dns_rdata_toregion(rdata, &r);
+ return ((digest)(arg, &r));
+}
+
+static bool
+checkowner_nsec(ARGS_CHECKOWNER) {
+ REQUIRE(type == dns_rdatatype_nsec);
+
+ UNUSED(name);
+ UNUSED(type);
+ UNUSED(rdclass);
+ UNUSED(wildcard);
+
+ return (true);
+}
+
+static bool
+checknames_nsec(ARGS_CHECKNAMES) {
+ REQUIRE(rdata->type == dns_rdatatype_nsec);
+
+ UNUSED(rdata);
+ UNUSED(owner);
+ UNUSED(bad);
+
+ return (true);
+}
+
+static int
+casecompare_nsec(ARGS_COMPARE) {
+ isc_region_t region1;
+ isc_region_t region2;
+ dns_name_t name1;
+ dns_name_t name2;
+ int order;
+
+ REQUIRE(rdata1->type == rdata2->type);
+ REQUIRE(rdata1->rdclass == rdata2->rdclass);
+ REQUIRE(rdata1->type == dns_rdatatype_nsec);
+ REQUIRE(rdata1->length != 0);
+ REQUIRE(rdata2->length != 0);
+
+ dns_name_init(&name1, NULL);
+ dns_name_init(&name2, NULL);
+
+ dns_rdata_toregion(rdata1, &region1);
+ dns_rdata_toregion(rdata2, &region2);
+
+ dns_name_fromregion(&name1, &region1);
+ dns_name_fromregion(&name2, &region2);
+
+ order = dns_name_rdatacompare(&name1, &name2);
+ if (order != 0) {
+ return (order);
+ }
+
+ isc_region_consume(&region1, name_length(&name1));
+ isc_region_consume(&region2, name_length(&name2));
+
+ return (isc_region_compare(&region1, &region2));
+}
+#endif /* RDATA_GENERIC_NSEC_47_C */