/* $NetBSD: srv_33.c,v 1.7.2.1 2024/02/25 15:47:07 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. */ /* RFC2782 */ #ifndef RDATA_IN_1_SRV_33_C #define RDATA_IN_1_SRV_33_C #define RRTYPE_SRV_ATTRIBUTES (DNS_RDATATYPEATTR_FOLLOWADDITIONAL) static isc_result_t fromtext_in_srv(ARGS_FROMTEXT) { isc_token_t token; dns_name_t name; isc_buffer_t buffer; bool ok; REQUIRE(type == dns_rdatatype_srv); REQUIRE(rdclass == dns_rdataclass_in); UNUSED(type); UNUSED(rdclass); UNUSED(callbacks); /* * Priority. */ RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_number, false)); if (token.value.as_ulong > 0xffffU) { RETTOK(ISC_R_RANGE); } RETERR(uint16_tobuffer(token.value.as_ulong, target)); /* * Weight. */ RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_number, false)); if (token.value.as_ulong > 0xffffU) { RETTOK(ISC_R_RANGE); } RETERR(uint16_tobuffer(token.value.as_ulong, target)); /* * Port. */ RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_number, false)); if (token.value.as_ulong > 0xffffU) { RETTOK(ISC_R_RANGE); } RETERR(uint16_tobuffer(token.value.as_ulong, target)); /* * Target. */ 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)); ok = true; if ((options & DNS_RDATA_CHECKNAMES) != 0) { 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_in_srv(ARGS_TOTEXT) { isc_region_t region; dns_name_t name; dns_name_t prefix; bool sub; char buf[sizeof("64000")]; unsigned short num; REQUIRE(rdata->type == dns_rdatatype_srv); REQUIRE(rdata->rdclass == dns_rdataclass_in); REQUIRE(rdata->length != 0); dns_name_init(&name, NULL); dns_name_init(&prefix, NULL); /* * Priority. */ dns_rdata_toregion(rdata, ®ion); num = uint16_fromregion(®ion); isc_region_consume(®ion, 2); snprintf(buf, sizeof(buf), "%u", num); RETERR(str_totext(buf, target)); RETERR(str_totext(" ", target)); /* * Weight. */ num = uint16_fromregion(®ion); isc_region_consume(®ion, 2); snprintf(buf, sizeof(buf), "%u", num); RETERR(str_totext(buf, target)); RETERR(str_totext(" ", target)); /* * Port. */ num = uint16_fromregion(®ion); isc_region_consume(®ion, 2); snprintf(buf, sizeof(buf), "%u", num); RETERR(str_totext(buf, target)); RETERR(str_totext(" ", target)); /* * Target. */ dns_name_fromregion(&name, ®ion); sub = name_prefix(&name, tctx->origin, &prefix); return (dns_name_totext(&prefix, sub, target)); } static isc_result_t fromwire_in_srv(ARGS_FROMWIRE) { dns_name_t name; isc_region_t sr; REQUIRE(type == dns_rdatatype_srv); REQUIRE(rdclass == dns_rdataclass_in); UNUSED(type); UNUSED(rdclass); dns_decompress_setmethods(dctx, DNS_COMPRESS_NONE); dns_name_init(&name, NULL); /* * Priority, weight, port. */ isc_buffer_activeregion(source, &sr); if (sr.length < 6) { return (ISC_R_UNEXPECTEDEND); } RETERR(mem_tobuffer(target, sr.base, 6)); isc_buffer_forward(source, 6); /* * Target. */ return (dns_name_fromwire(&name, source, dctx, options, target)); } static isc_result_t towire_in_srv(ARGS_TOWIRE) { dns_name_t name; dns_offsets_t offsets; isc_region_t sr; REQUIRE(rdata->type == dns_rdatatype_srv); REQUIRE(rdata->length != 0); dns_compress_setmethods(cctx, DNS_COMPRESS_NONE); /* * Priority, weight, port. */ dns_rdata_toregion(rdata, &sr); RETERR(mem_tobuffer(target, sr.base, 6)); isc_region_consume(&sr, 6); /* * Target. */ dns_name_init(&name, offsets); dns_name_fromregion(&name, &sr); return (dns_name_towire(&name, cctx, target)); } static int compare_in_srv(ARGS_COMPARE) { dns_name_t name1; dns_name_t name2; isc_region_t region1; isc_region_t region2; int order; REQUIRE(rdata1->type == rdata2->type); REQUIRE(rdata1->rdclass == rdata2->rdclass); REQUIRE(rdata1->type == dns_rdatatype_srv); REQUIRE(rdata1->rdclass == dns_rdataclass_in); REQUIRE(rdata1->length != 0); REQUIRE(rdata2->length != 0); /* * Priority, weight, port. */ order = memcmp(rdata1->data, rdata2->data, 6); if (order != 0) { return (order < 0 ? -1 : 1); } /* * Target. */ dns_name_init(&name1, NULL); dns_name_init(&name2, NULL); dns_rdata_toregion(rdata1, ®ion1); dns_rdata_toregion(rdata2, ®ion2); isc_region_consume(®ion1, 6); isc_region_consume(®ion2, 6); dns_name_fromregion(&name1, ®ion1); dns_name_fromregion(&name2, ®ion2); return (dns_name_rdatacompare(&name1, &name2)); } static isc_result_t fromstruct_in_srv(ARGS_FROMSTRUCT) { dns_rdata_in_srv_t *srv = source; isc_region_t region; REQUIRE(type == dns_rdatatype_srv); REQUIRE(rdclass == dns_rdataclass_in); REQUIRE(srv != NULL); REQUIRE(srv->common.rdtype == type); REQUIRE(srv->common.rdclass == rdclass); UNUSED(type); UNUSED(rdclass); RETERR(uint16_tobuffer(srv->priority, target)); RETERR(uint16_tobuffer(srv->weight, target)); RETERR(uint16_tobuffer(srv->port, target)); dns_name_toregion(&srv->target, ®ion); return (isc_buffer_copyregion(target, ®ion)); } static isc_result_t tostruct_in_srv(ARGS_TOSTRUCT) { isc_region_t region; dns_rdata_in_srv_t *srv = target; dns_name_t name; REQUIRE(rdata->rdclass == dns_rdataclass_in); REQUIRE(rdata->type == dns_rdatatype_srv); REQUIRE(srv != NULL); REQUIRE(rdata->length != 0); srv->common.rdclass = rdata->rdclass; srv->common.rdtype = rdata->type; ISC_LINK_INIT(&srv->common, link); dns_name_init(&name, NULL); dns_rdata_toregion(rdata, ®ion); srv->priority = uint16_fromregion(®ion); isc_region_consume(®ion, 2); srv->weight = uint16_fromregion(®ion); isc_region_consume(®ion, 2); srv->port = uint16_fromregion(®ion); isc_region_consume(®ion, 2); dns_name_fromregion(&name, ®ion); dns_name_init(&srv->target, NULL); name_duporclone(&name, mctx, &srv->target); srv->mctx = mctx; return (ISC_R_SUCCESS); } static void freestruct_in_srv(ARGS_FREESTRUCT) { dns_rdata_in_srv_t *srv = source; REQUIRE(srv != NULL); REQUIRE(srv->common.rdclass == dns_rdataclass_in); REQUIRE(srv->common.rdtype == dns_rdatatype_srv); if (srv->mctx == NULL) { return; } dns_name_free(&srv->target, srv->mctx); srv->mctx = NULL; } static isc_result_t additionaldata_in_srv(ARGS_ADDLDATA) { char buf[sizeof("_65000._tcp")]; dns_fixedname_t fixed; dns_name_t name; dns_offsets_t offsets; isc_region_t region; uint16_t port; isc_result_t result; REQUIRE(rdata->type == dns_rdatatype_srv); REQUIRE(rdata->rdclass == dns_rdataclass_in); UNUSED(owner); dns_name_init(&name, offsets); dns_rdata_toregion(rdata, ®ion); isc_region_consume(®ion, 4); port = uint16_fromregion(®ion); isc_region_consume(®ion, 2); dns_name_fromregion(&name, ®ion); if (dns_name_equal(&name, dns_rootname)) { return (ISC_R_SUCCESS); } result = (add)(arg, &name, dns_rdatatype_a, NULL); if (result != ISC_R_SUCCESS) { return (result); } dns_fixedname_init(&fixed); snprintf(buf, sizeof(buf), "_%u._tcp", port); result = dns_name_fromstring2(dns_fixedname_name(&fixed), buf, NULL, 0, NULL); if (result != ISC_R_SUCCESS) { return (ISC_R_SUCCESS); } result = dns_name_concatenate(dns_fixedname_name(&fixed), &name, dns_fixedname_name(&fixed), NULL); if (result != ISC_R_SUCCESS) { return (ISC_R_SUCCESS); } return ((add)(arg, dns_fixedname_name(&fixed), dns_rdatatype_tlsa, NULL)); } static isc_result_t digest_in_srv(ARGS_DIGEST) { isc_region_t r1, r2; dns_name_t name; REQUIRE(rdata->type == dns_rdatatype_srv); REQUIRE(rdata->rdclass == dns_rdataclass_in); dns_rdata_toregion(rdata, &r1); r2 = r1; isc_region_consume(&r2, 6); r1.length = 6; RETERR((digest)(arg, &r1)); dns_name_init(&name, NULL); dns_name_fromregion(&name, &r2); return (dns_name_digest(&name, digest, arg)); } static bool checkowner_in_srv(ARGS_CHECKOWNER) { REQUIRE(type == dns_rdatatype_srv); REQUIRE(rdclass == dns_rdataclass_in); UNUSED(name); UNUSED(type); UNUSED(rdclass); UNUSED(wildcard); return (true); } static bool checknames_in_srv(ARGS_CHECKNAMES) { isc_region_t region; dns_name_t name; REQUIRE(rdata->type == dns_rdatatype_srv); REQUIRE(rdata->rdclass == dns_rdataclass_in); UNUSED(owner); dns_rdata_toregion(rdata, ®ion); isc_region_consume(®ion, 6); 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_in_srv(ARGS_COMPARE) { return (compare_in_srv(rdata1, rdata2)); } #endif /* RDATA_IN_1_SRV_33_C */