/* $NetBSD: rt_21.c,v 1.3.4.1 2024/02/29 12:34:45 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. */ /* RFC1183 */ #ifndef RDATA_GENERIC_RT_21_C #define RDATA_GENERIC_RT_21_C #define RRTYPE_RT_ATTRIBUTES (0) static isc_result_t fromtext_rt(ARGS_FROMTEXT) { isc_token_t token; dns_name_t name; isc_buffer_t buffer; bool ok; REQUIRE(type == dns_rdatatype_rt); UNUSED(type); UNUSED(rdclass); UNUSED(callbacks); 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)); 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_rt(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_rt); REQUIRE(rdata->length != 0); dns_name_init(&name, NULL); dns_name_init(&prefix, NULL); 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)); dns_name_fromregion(&name, ®ion); sub = name_prefix(&name, tctx->origin, &prefix); return (dns_name_totext(&prefix, sub, target)); } static isc_result_t fromwire_rt(ARGS_FROMWIRE) { dns_name_t name; isc_region_t sregion; isc_region_t tregion; REQUIRE(type == dns_rdatatype_rt); UNUSED(type); UNUSED(rdclass); dns_decompress_setmethods(dctx, DNS_COMPRESS_NONE); dns_name_init(&name, NULL); isc_buffer_activeregion(source, &sregion); isc_buffer_availableregion(target, &tregion); if (tregion.length < 2) { return (ISC_R_NOSPACE); } if (sregion.length < 2) { return (ISC_R_UNEXPECTEDEND); } memmove(tregion.base, sregion.base, 2); isc_buffer_forward(source, 2); isc_buffer_add(target, 2); return (dns_name_fromwire(&name, source, dctx, options, target)); } static isc_result_t towire_rt(ARGS_TOWIRE) { dns_name_t name; dns_offsets_t offsets; isc_region_t region; isc_region_t tr; REQUIRE(rdata->type == dns_rdatatype_rt); REQUIRE(rdata->length != 0); dns_compress_setmethods(cctx, DNS_COMPRESS_NONE); isc_buffer_availableregion(target, &tr); dns_rdata_toregion(rdata, ®ion); if (tr.length < 2) { return (ISC_R_NOSPACE); } memmove(tr.base, region.base, 2); isc_region_consume(®ion, 2); isc_buffer_add(target, 2); dns_name_init(&name, offsets); dns_name_fromregion(&name, ®ion); return (dns_name_towire(&name, cctx, target)); } static int compare_rt(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_rt); REQUIRE(rdata1->length != 0); REQUIRE(rdata2->length != 0); order = memcmp(rdata1->data, rdata2->data, 2); if (order != 0) { return (order < 0 ? -1 : 1); } dns_name_init(&name1, NULL); dns_name_init(&name2, NULL); dns_rdata_toregion(rdata1, ®ion1); dns_rdata_toregion(rdata2, ®ion2); isc_region_consume(®ion1, 2); isc_region_consume(®ion2, 2); dns_name_fromregion(&name1, ®ion1); dns_name_fromregion(&name2, ®ion2); return (dns_name_rdatacompare(&name1, &name2)); } static isc_result_t fromstruct_rt(ARGS_FROMSTRUCT) { dns_rdata_rt_t *rt = source; isc_region_t region; REQUIRE(type == dns_rdatatype_rt); REQUIRE(rt != NULL); REQUIRE(rt->common.rdtype == type); REQUIRE(rt->common.rdclass == rdclass); UNUSED(type); UNUSED(rdclass); RETERR(uint16_tobuffer(rt->preference, target)); dns_name_toregion(&rt->host, ®ion); return (isc_buffer_copyregion(target, ®ion)); } static isc_result_t tostruct_rt(ARGS_TOSTRUCT) { isc_region_t region; dns_rdata_rt_t *rt = target; dns_name_t name; REQUIRE(rdata->type == dns_rdatatype_rt); REQUIRE(rt != NULL); REQUIRE(rdata->length != 0); rt->common.rdclass = rdata->rdclass; rt->common.rdtype = rdata->type; ISC_LINK_INIT(&rt->common, link); dns_name_init(&name, NULL); dns_rdata_toregion(rdata, ®ion); rt->preference = uint16_fromregion(®ion); isc_region_consume(®ion, 2); dns_name_fromregion(&name, ®ion); dns_name_init(&rt->host, NULL); name_duporclone(&name, mctx, &rt->host); rt->mctx = mctx; return (ISC_R_SUCCESS); } static void freestruct_rt(ARGS_FREESTRUCT) { dns_rdata_rt_t *rt = source; REQUIRE(rt != NULL); REQUIRE(rt->common.rdtype == dns_rdatatype_rt); if (rt->mctx == NULL) { return; } dns_name_free(&rt->host, rt->mctx); rt->mctx = NULL; } static isc_result_t additionaldata_rt(ARGS_ADDLDATA) { dns_name_t name; dns_offsets_t offsets; isc_region_t region; isc_result_t result; REQUIRE(rdata->type == dns_rdatatype_rt); UNUSED(owner); dns_name_init(&name, offsets); dns_rdata_toregion(rdata, ®ion); isc_region_consume(®ion, 2); dns_name_fromregion(&name, ®ion); result = (add)(arg, &name, dns_rdatatype_x25, NULL); if (result != ISC_R_SUCCESS) { return (result); } result = (add)(arg, &name, dns_rdatatype_isdn, NULL); if (result != ISC_R_SUCCESS) { return (result); } return ((add)(arg, &name, dns_rdatatype_a, NULL)); } static isc_result_t digest_rt(ARGS_DIGEST) { isc_region_t r1, r2; isc_result_t result; dns_name_t name; REQUIRE(rdata->type == dns_rdatatype_rt); dns_rdata_toregion(rdata, &r1); r2 = r1; isc_region_consume(&r2, 2); r1.length = 2; result = (digest)(arg, &r1); if (result != ISC_R_SUCCESS) { return (result); } dns_name_init(&name, NULL); dns_name_fromregion(&name, &r2); return (dns_name_digest(&name, digest, arg)); } static bool checkowner_rt(ARGS_CHECKOWNER) { REQUIRE(type == dns_rdatatype_rt); UNUSED(name); UNUSED(type); UNUSED(rdclass); UNUSED(wildcard); return (true); } static bool checknames_rt(ARGS_CHECKNAMES) { isc_region_t region; dns_name_t name; REQUIRE(rdata->type == dns_rdatatype_rt); UNUSED(owner); dns_rdata_toregion(rdata, ®ion); isc_region_consume(®ion, 2); 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_rt(ARGS_COMPARE) { return (compare_rt(rdata1, rdata2)); } #endif /* RDATA_GENERIC_RT_21_C */