/* $NetBSD: a_1.c,v 1.7.2.1 2024/02/25 15:47:00 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. */ /* by Bjorn.Victor@it.uu.se, 2005-05-07 */ /* Based on generic/soa_6.c and generic/mx_15.c */ #ifndef RDATA_CH_3_A_1_C #define RDATA_CH_3_A_1_C #include #define RRTYPE_A_ATTRIBUTES (0) static isc_result_t fromtext_ch_a(ARGS_FROMTEXT) { isc_token_t token; dns_name_t name; isc_buffer_t buffer; REQUIRE(type == dns_rdatatype_a); REQUIRE(rdclass == dns_rdataclass_ch); /* 3 */ UNUSED(type); UNUSED(callbacks); RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_string, false)); /* get domain name */ 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 ((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); } } /* 16-bit octal address */ RETERR(isc_lex_getoctaltoken(lexer, &token, false)); if (token.value.as_ulong > 0xffffU) { RETTOK(ISC_R_RANGE); } return (uint16_tobuffer(token.value.as_ulong, target)); } static isc_result_t totext_ch_a(ARGS_TOTEXT) { isc_region_t region; dns_name_t name; dns_name_t prefix; bool sub; char buf[sizeof("0177777")]; uint16_t addr; REQUIRE(rdata->type == dns_rdatatype_a); REQUIRE(rdata->rdclass == dns_rdataclass_ch); /* 3 */ REQUIRE(rdata->length != 0); dns_name_init(&name, NULL); dns_name_init(&prefix, NULL); dns_rdata_toregion(rdata, ®ion); dns_name_fromregion(&name, ®ion); isc_region_consume(®ion, name_length(&name)); addr = uint16_fromregion(®ion); sub = name_prefix(&name, tctx->origin, &prefix); RETERR(dns_name_totext(&prefix, sub, target)); snprintf(buf, sizeof(buf), "%o", addr); /* note octal */ RETERR(str_totext(" ", target)); return (str_totext(buf, target)); } static isc_result_t fromwire_ch_a(ARGS_FROMWIRE) { isc_region_t sregion; isc_region_t tregion; dns_name_t name; REQUIRE(type == dns_rdatatype_a); REQUIRE(rdclass == dns_rdataclass_ch); UNUSED(type); UNUSED(rdclass); dns_decompress_setmethods(dctx, DNS_COMPRESS_GLOBAL14); dns_name_init(&name, NULL); RETERR(dns_name_fromwire(&name, source, dctx, options, target)); isc_buffer_activeregion(source, &sregion); isc_buffer_availableregion(target, &tregion); if (sregion.length < 2) { return (ISC_R_UNEXPECTEDEND); } if (tregion.length < 2) { return (ISC_R_NOSPACE); } memmove(tregion.base, sregion.base, 2); isc_buffer_forward(source, 2); isc_buffer_add(target, 2); return (ISC_R_SUCCESS); } static isc_result_t towire_ch_a(ARGS_TOWIRE) { dns_name_t name; dns_offsets_t offsets; isc_region_t sregion; isc_region_t tregion; REQUIRE(rdata->type == dns_rdatatype_a); REQUIRE(rdata->rdclass == dns_rdataclass_ch); REQUIRE(rdata->length != 0); dns_compress_setmethods(cctx, DNS_COMPRESS_GLOBAL14); dns_name_init(&name, offsets); dns_rdata_toregion(rdata, &sregion); dns_name_fromregion(&name, &sregion); isc_region_consume(&sregion, name_length(&name)); RETERR(dns_name_towire(&name, cctx, target)); isc_buffer_availableregion(target, &tregion); if (tregion.length < 2) { return (ISC_R_NOSPACE); } memmove(tregion.base, sregion.base, 2); isc_buffer_add(target, 2); return (ISC_R_SUCCESS); } static int compare_ch_a(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_a); REQUIRE(rdata1->rdclass == dns_rdataclass_ch); 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); isc_region_consume(®ion1, name_length(&name1)); isc_region_consume(®ion2, name_length(&name2)); order = dns_name_rdatacompare(&name1, &name2); if (order != 0) { return (order); } order = memcmp(region1.base, region2.base, 2); if (order != 0) { order = (order < 0) ? -1 : 1; } return (order); } static isc_result_t fromstruct_ch_a(ARGS_FROMSTRUCT) { dns_rdata_ch_a_t *a = source; isc_region_t region; REQUIRE(type == dns_rdatatype_a); REQUIRE(a != NULL); REQUIRE(a->common.rdtype == type); REQUIRE(a->common.rdclass == rdclass); UNUSED(type); UNUSED(rdclass); dns_name_toregion(&a->ch_addr_dom, ®ion); RETERR(isc_buffer_copyregion(target, ®ion)); return (uint16_tobuffer(ntohs(a->ch_addr), target)); } static isc_result_t tostruct_ch_a(ARGS_TOSTRUCT) { dns_rdata_ch_a_t *a = target; isc_region_t region; dns_name_t name; REQUIRE(rdata->type == dns_rdatatype_a); REQUIRE(rdata->rdclass == dns_rdataclass_ch); REQUIRE(rdata->length != 0); a->common.rdclass = rdata->rdclass; a->common.rdtype = rdata->type; ISC_LINK_INIT(&a->common, link); dns_rdata_toregion(rdata, ®ion); dns_name_init(&name, NULL); dns_name_fromregion(&name, ®ion); isc_region_consume(®ion, name_length(&name)); dns_name_init(&a->ch_addr_dom, NULL); name_duporclone(&name, mctx, &a->ch_addr_dom); a->ch_addr = htons(uint16_fromregion(®ion)); a->mctx = mctx; return (ISC_R_SUCCESS); } static void freestruct_ch_a(ARGS_FREESTRUCT) { dns_rdata_ch_a_t *a = source; REQUIRE(a != NULL); REQUIRE(a->common.rdtype == dns_rdatatype_a); if (a->mctx == NULL) { return; } dns_name_free(&a->ch_addr_dom, a->mctx); a->mctx = NULL; } static isc_result_t additionaldata_ch_a(ARGS_ADDLDATA) { REQUIRE(rdata->type == dns_rdatatype_a); REQUIRE(rdata->rdclass == dns_rdataclass_ch); UNUSED(rdata); UNUSED(owner); UNUSED(add); UNUSED(arg); return (ISC_R_SUCCESS); } static isc_result_t digest_ch_a(ARGS_DIGEST) { isc_region_t r; dns_name_t name; REQUIRE(rdata->type == dns_rdatatype_a); REQUIRE(rdata->rdclass == dns_rdataclass_ch); dns_rdata_toregion(rdata, &r); dns_name_init(&name, NULL); dns_name_fromregion(&name, &r); isc_region_consume(&r, name_length(&name)); RETERR(dns_name_digest(&name, digest, arg)); return ((digest)(arg, &r)); } static bool checkowner_ch_a(ARGS_CHECKOWNER) { REQUIRE(type == dns_rdatatype_a); REQUIRE(rdclass == dns_rdataclass_ch); UNUSED(type); return (dns_name_ishostname(name, wildcard)); } static bool checknames_ch_a(ARGS_CHECKNAMES) { isc_region_t region; dns_name_t name; REQUIRE(rdata->type == dns_rdatatype_a); REQUIRE(rdata->rdclass == dns_rdataclass_ch); UNUSED(owner); 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_ch_a(ARGS_COMPARE) { return (compare_ch_a(rdata1, rdata2)); } #endif /* RDATA_CH_3_A_1_C */