diff options
Diffstat (limited to 'lib/dns/rdata/generic/ptr_12.c')
| -rw-r--r-- | lib/dns/rdata/generic/ptr_12.c | 278 |
1 files changed, 278 insertions, 0 deletions
diff --git a/lib/dns/rdata/generic/ptr_12.c b/lib/dns/rdata/generic/ptr_12.c new file mode 100644 index 0000000..5d39300 --- /dev/null +++ b/lib/dns/rdata/generic/ptr_12.c @@ -0,0 +1,278 @@ +/* + * 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); + RETERR(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(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 */ |