/* $NetBSD: ptr_12.c,v 1.7.2.1 2024/02/25 15:47:04 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. */ #ifndef RDATA_GENERIC_PTR_12_C #define RDATA_GENERIC_PTR_12_C #define RRTYPE_PTR_ATTRIBUTES (0) static isc_result_t fromtext_ptr(ARGS_FROMTEXT) { isc_token_t token; dns_name_t name; isc_buffer_t buffer; REQUIRE(type == dns_rdatatype_ptr); UNUSED(type); UNUSED(rdclass); UNUSED(callbacks); 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)); if (rdclass == dns_rdataclass_in && (options & DNS_RDATA_CHECKNAMES) != 0 && (options & DNS_RDATA_CHECKREVERSE) != 0) { bool ok; ok = dns_name_ishostname(&name, false); if (!ok && (options & DNS_RDATA_CHECKNAMESFAIL) != 0) { RETTOK(DNS_R_BADNAME); } if (!ok && callbacks != NULL) { warn_badname(&name, lexer, callbacks); } } return (ISC_R_SUCCESS); } static isc_result_t totext_ptr(ARGS_TOTEXT) { isc_region_t region; dns_name_t name; dns_name_t prefix; bool sub; REQUIRE(rdata->type == dns_rdatatype_ptr); REQUIRE(rdata->length != 0); dns_name_init(&name, NULL); dns_name_init(&prefix, NULL); dns_rdata_toregion(rdata, ®ion); dns_name_fromregion(&name, ®ion); sub = name_prefix(&name, tctx->origin, &prefix); return (dns_name_totext(&prefix, sub, target)); } static isc_result_t fromwire_ptr(ARGS_FROMWIRE) { dns_name_t name; REQUIRE(type == dns_rdatatype_ptr); UNUSED(type); UNUSED(rdclass); dns_decompress_setmethods(dctx, DNS_COMPRESS_GLOBAL14); dns_name_init(&name, NULL); return (dns_name_fromwire(&name, source, dctx, options, target)); } static isc_result_t towire_ptr(ARGS_TOWIRE) { dns_name_t name; dns_offsets_t offsets; isc_region_t region; REQUIRE(rdata->type == dns_rdatatype_ptr); REQUIRE(rdata->length != 0); dns_compress_setmethods(cctx, DNS_COMPRESS_GLOBAL14); dns_name_init(&name, offsets); dns_rdata_toregion(rdata, ®ion); dns_name_fromregion(&name, ®ion); return (dns_name_towire(&name, cctx, target)); } static int compare_ptr(ARGS_COMPARE) { dns_name_t name1; dns_name_t name2; isc_region_t region1; isc_region_t region2; REQUIRE(rdata1->type == rdata2->type); REQUIRE(rdata1->rdclass == rdata2->rdclass); REQUIRE(rdata1->type == dns_rdatatype_ptr); 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); return (dns_name_rdatacompare(&name1, &name2)); } static isc_result_t fromstruct_ptr(ARGS_FROMSTRUCT) { dns_rdata_ptr_t *ptr = source; isc_region_t region; REQUIRE(type == dns_rdatatype_ptr); REQUIRE(ptr != NULL); REQUIRE(ptr->common.rdtype == type); REQUIRE(ptr->common.rdclass == rdclass); UNUSED(type); UNUSED(rdclass); dns_name_toregion(&ptr->ptr, ®ion); return (isc_buffer_copyregion(target, ®ion)); } static isc_result_t tostruct_ptr(ARGS_TOSTRUCT) { isc_region_t region; dns_rdata_ptr_t *ptr = target; dns_name_t name; REQUIRE(rdata->type == dns_rdatatype_ptr); REQUIRE(ptr != NULL); REQUIRE(rdata->length != 0); ptr->common.rdclass = rdata->rdclass; ptr->common.rdtype = rdata->type; ISC_LINK_INIT(&ptr->common, link); dns_name_init(&name, NULL); dns_rdata_toregion(rdata, ®ion); dns_name_fromregion(&name, ®ion); dns_name_init(&ptr->ptr, NULL); name_duporclone(&name, mctx, &ptr->ptr); ptr->mctx = mctx; return (ISC_R_SUCCESS); } static void freestruct_ptr(ARGS_FREESTRUCT) { dns_rdata_ptr_t *ptr = source; REQUIRE(ptr != NULL); REQUIRE(ptr->common.rdtype == dns_rdatatype_ptr); if (ptr->mctx == NULL) { return; } dns_name_free(&ptr->ptr, ptr->mctx); ptr->mctx = NULL; } static isc_result_t additionaldata_ptr(ARGS_ADDLDATA) { REQUIRE(rdata->type == dns_rdatatype_ptr); UNUSED(rdata); UNUSED(owner); UNUSED(add); UNUSED(arg); return (ISC_R_SUCCESS); } static isc_result_t digest_ptr(ARGS_DIGEST) { isc_region_t r; dns_name_t name; REQUIRE(rdata->type == dns_rdatatype_ptr); dns_rdata_toregion(rdata, &r); dns_name_init(&name, NULL); dns_name_fromregion(&name, &r); return (dns_name_digest(&name, digest, arg)); } static bool checkowner_ptr(ARGS_CHECKOWNER) { REQUIRE(type == dns_rdatatype_ptr); UNUSED(name); UNUSED(type); UNUSED(rdclass); UNUSED(wildcard); return (true); } static unsigned char ip6_arpa_data[] = "\003IP6\004ARPA"; static unsigned char ip6_arpa_offsets[] = { 0, 4, 9 }; static const dns_name_t ip6_arpa = DNS_NAME_INITABSOLUTE(ip6_arpa_data, ip6_arpa_offsets); static unsigned char ip6_int_data[] = "\003IP6\003INT"; static unsigned char ip6_int_offsets[] = { 0, 4, 8 }; static const dns_name_t ip6_int = DNS_NAME_INITABSOLUTE(ip6_int_data, ip6_int_offsets); static unsigned char in_addr_arpa_data[] = "\007IN-ADDR\004ARPA"; static unsigned char in_addr_arpa_offsets[] = { 0, 8, 13 }; static const dns_name_t in_addr_arpa = DNS_NAME_INITABSOLUTE(in_addr_arpa_data, in_addr_arpa_offsets); static bool checknames_ptr(ARGS_CHECKNAMES) { isc_region_t region; dns_name_t name; REQUIRE(rdata->type == dns_rdatatype_ptr); if (rdata->rdclass != dns_rdataclass_in) { return (true); } if (dns_name_isdnssd(owner)) { return (true); } if (dns_name_issubdomain(owner, &in_addr_arpa) || dns_name_issubdomain(owner, &ip6_arpa) || dns_name_issubdomain(owner, &ip6_int)) { dns_rdata_toregion(rdata, ®ion); dns_name_init(&name, NULL); dns_name_fromregion(&name, ®ion); if (!dns_name_ishostname(&name, false)) { if (bad != NULL) { dns_name_clone(&name, bad); } return (false); } } return (true); } static int casecompare_ptr(ARGS_COMPARE) { return (compare_ptr(rdata1, rdata2)); } #endif /* RDATA_GENERIC_PTR_12_C */