/* $NetBSD: nsec_47.c,v 1.1.4.2 2024/02/29 11:38:54 martin Exp $ */ /* * 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, ®ion); RETERR(isc_buffer_copyregion(target, ®ion)); region.base = nsec->typebits; region.length = nsec->len; RETERR(typemap_test(®ion, 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, ®ion); dns_name_fromregion(&name, ®ion); isc_region_consume(®ion, 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, ®ion1); dns_rdata_toregion(rdata2, ®ion2); dns_name_fromregion(&name1, ®ion1); dns_name_fromregion(&name2, ®ion2); order = dns_name_rdatacompare(&name1, &name2); if (order != 0) { return (order); } isc_region_consume(®ion1, name_length(&name1)); isc_region_consume(®ion2, name_length(&name2)); return (isc_region_compare(®ion1, ®ion2)); } #endif /* RDATA_GENERIC_NSEC_47_C */