1 /* 2 * Copyright (C) Internet Systems Consortium, Inc. ("ISC") 3 * 4 * Permission to use, copy, modify, and/or distribute this software for any 5 * purpose with or without fee is hereby granted, provided that the above 6 * copyright notice and this permission notice appear in all copies. 7 * 8 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH 9 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY 10 * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT, 11 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM 12 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE 13 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR 14 * PERFORMANCE OF THIS SOFTWARE. 15 */ 16 17 /* $Id: cname_5.c,v 1.8 2020/02/26 18:38:15 florian Exp $ */ 18 19 /* reviewed: Wed Mar 15 16:48:45 PST 2000 by brister */ 20 21 #ifndef RDATA_GENERIC_CNAME_5_C 22 #define RDATA_GENERIC_CNAME_5_C 23 24 static inline isc_result_t 25 totext_cname(ARGS_TOTEXT) { 26 isc_region_t region; 27 dns_name_t name; 28 dns_name_t prefix; 29 isc_boolean_t sub; 30 31 REQUIRE(rdata->type == dns_rdatatype_cname); 32 REQUIRE(rdata->length != 0); 33 34 dns_name_init(&name, NULL); 35 dns_name_init(&prefix, NULL); 36 37 dns_rdata_toregion(rdata, ®ion); 38 dns_name_fromregion(&name, ®ion); 39 40 sub = name_prefix(&name, tctx->origin, &prefix); 41 42 return (dns_name_totext(&prefix, sub, target)); 43 } 44 45 static inline isc_result_t 46 fromwire_cname(ARGS_FROMWIRE) { 47 dns_name_t name; 48 49 REQUIRE(type == dns_rdatatype_cname); 50 51 UNUSED(type); 52 UNUSED(rdclass); 53 54 dns_decompress_setmethods(dctx, DNS_COMPRESS_GLOBAL14); 55 56 dns_name_init(&name, NULL); 57 return (dns_name_fromwire(&name, source, dctx, options, target)); 58 } 59 60 static inline isc_result_t 61 towire_cname(ARGS_TOWIRE) { 62 dns_name_t name; 63 dns_offsets_t offsets; 64 isc_region_t region; 65 66 REQUIRE(rdata->type == dns_rdatatype_cname); 67 REQUIRE(rdata->length != 0); 68 69 dns_compress_setmethods(cctx, DNS_COMPRESS_GLOBAL14); 70 71 dns_name_init(&name, offsets); 72 dns_rdata_toregion(rdata, ®ion); 73 dns_name_fromregion(&name, ®ion); 74 75 return (dns_name_towire(&name, cctx, target)); 76 } 77 78 static inline isc_result_t 79 tostruct_cname(ARGS_TOSTRUCT) { 80 isc_region_t region; 81 dns_rdata_cname_t *cname = target; 82 dns_name_t name; 83 84 REQUIRE(rdata->type == dns_rdatatype_cname); 85 REQUIRE(target != NULL); 86 REQUIRE(rdata->length != 0); 87 88 cname->common.rdclass = rdata->rdclass; 89 cname->common.rdtype = rdata->type; 90 ISC_LINK_INIT(&cname->common, link); 91 92 dns_name_init(&name, NULL); 93 dns_rdata_toregion(rdata, ®ion); 94 dns_name_fromregion(&name, ®ion); 95 dns_name_init(&cname->cname, NULL); 96 RETERR(name_duporclone(&name, &cname->cname)); 97 return (ISC_R_SUCCESS); 98 } 99 100 static inline void 101 freestruct_cname(ARGS_FREESTRUCT) { 102 dns_rdata_cname_t *cname = source; 103 104 REQUIRE(source != NULL); 105 106 dns_name_free(&cname->cname); 107 } 108 109 #endif /* RDATA_GENERIC_CNAME_5_C */ 110