1/* 2 * Copyright (C) 2004, 2007, 2009 Internet Systems Consortium, Inc. ("ISC") 3 * Copyright (C) 1998-2001 Internet Software Consortium. 4 * 5 * Permission to use, copy, modify, and/or distribute this software for any 6 * purpose with or without fee is hereby granted, provided that the above 7 * copyright notice and this permission notice appear in all copies. 8 * 9 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH 10 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY 11 * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT, 12 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM 13 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE 14 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR 15 * PERFORMANCE OF THIS SOFTWARE. 16 */ 17 18/* $Id: cname_5.c,v 1.49 2009/12/04 22:06:37 tbox Exp $ */ 19 20/* reviewed: Wed Mar 15 16:48:45 PST 2000 by brister */ 21 22#ifndef RDATA_GENERIC_CNAME_5_C 23#define RDATA_GENERIC_CNAME_5_C 24 25#define RRTYPE_CNAME_ATTRIBUTES \ 26 (DNS_RDATATYPEATTR_EXCLUSIVE | DNS_RDATATYPEATTR_SINGLETON) 27 28static inline isc_result_t 29fromtext_cname(ARGS_FROMTEXT) { 30 isc_token_t token; 31 dns_name_t name; 32 isc_buffer_t buffer; 33 34 REQUIRE(type == 5); 35 36 UNUSED(type); 37 UNUSED(rdclass); 38 UNUSED(callbacks); 39 40 RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_string, 41 ISC_FALSE)); 42 43 dns_name_init(&name, NULL); 44 buffer_fromregion(&buffer, &token.value.as_region); 45 origin = (origin != NULL) ? origin : dns_rootname; 46 RETTOK(dns_name_fromtext(&name, &buffer, origin, options, target)); 47 return (ISC_R_SUCCESS); 48} 49 50static inline isc_result_t 51totext_cname(ARGS_TOTEXT) { 52 isc_region_t region; 53 dns_name_t name; 54 dns_name_t prefix; 55 isc_boolean_t sub; 56 57 REQUIRE(rdata->type == 5); 58 REQUIRE(rdata->length != 0); 59 60 dns_name_init(&name, NULL); 61 dns_name_init(&prefix, NULL); 62 63 dns_rdata_toregion(rdata, ®ion); 64 dns_name_fromregion(&name, ®ion); 65 66 sub = name_prefix(&name, tctx->origin, &prefix); 67 68 return (dns_name_totext(&prefix, sub, target)); 69} 70 71static inline isc_result_t 72fromwire_cname(ARGS_FROMWIRE) { 73 dns_name_t name; 74 75 REQUIRE(type == 5); 76 77 UNUSED(type); 78 UNUSED(rdclass); 79 80 dns_decompress_setmethods(dctx, DNS_COMPRESS_GLOBAL14); 81 82 dns_name_init(&name, NULL); 83 return (dns_name_fromwire(&name, source, dctx, options, target)); 84} 85 86static inline isc_result_t 87towire_cname(ARGS_TOWIRE) { 88 dns_name_t name; 89 dns_offsets_t offsets; 90 isc_region_t region; 91 92 REQUIRE(rdata->type == 5); 93 REQUIRE(rdata->length != 0); 94 95 dns_compress_setmethods(cctx, DNS_COMPRESS_GLOBAL14); 96 97 dns_name_init(&name, offsets); 98 dns_rdata_toregion(rdata, ®ion); 99 dns_name_fromregion(&name, ®ion); 100 101 return (dns_name_towire(&name, cctx, target)); 102} 103 104static inline int 105compare_cname(ARGS_COMPARE) { 106 dns_name_t name1; 107 dns_name_t name2; 108 isc_region_t region1; 109 isc_region_t region2; 110 111 REQUIRE(rdata1->type == rdata2->type); 112 REQUIRE(rdata1->rdclass == rdata2->rdclass); 113 REQUIRE(rdata1->type == 5); 114 REQUIRE(rdata1->length != 0); 115 REQUIRE(rdata2->length != 0); 116 117 dns_name_init(&name1, NULL); 118 dns_name_init(&name2, NULL); 119 120 dns_rdata_toregion(rdata1, ®ion1); 121 dns_rdata_toregion(rdata2, ®ion2); 122 123 dns_name_fromregion(&name1, ®ion1); 124 dns_name_fromregion(&name2, ®ion2); 125 126 return (dns_name_rdatacompare(&name1, &name2)); 127} 128 129static inline isc_result_t 130fromstruct_cname(ARGS_FROMSTRUCT) { 131 dns_rdata_cname_t *cname = source; 132 isc_region_t region; 133 134 REQUIRE(type == 5); 135 REQUIRE(source != NULL); 136 REQUIRE(cname->common.rdtype == type); 137 REQUIRE(cname->common.rdclass == rdclass); 138 139 UNUSED(type); 140 UNUSED(rdclass); 141 142 dns_name_toregion(&cname->cname, ®ion); 143 return (isc_buffer_copyregion(target, ®ion)); 144} 145 146static inline isc_result_t 147tostruct_cname(ARGS_TOSTRUCT) { 148 isc_region_t region; 149 dns_rdata_cname_t *cname = target; 150 dns_name_t name; 151 152 REQUIRE(rdata->type == 5); 153 REQUIRE(target != NULL); 154 REQUIRE(rdata->length != 0); 155 156 cname->common.rdclass = rdata->rdclass; 157 cname->common.rdtype = rdata->type; 158 ISC_LINK_INIT(&cname->common, link); 159 160 dns_name_init(&name, NULL); 161 dns_rdata_toregion(rdata, ®ion); 162 dns_name_fromregion(&name, ®ion); 163 dns_name_init(&cname->cname, NULL); 164 RETERR(name_duporclone(&name, mctx, &cname->cname)); 165 cname->mctx = mctx; 166 return (ISC_R_SUCCESS); 167} 168 169static inline void 170freestruct_cname(ARGS_FREESTRUCT) { 171 dns_rdata_cname_t *cname = source; 172 173 REQUIRE(source != NULL); 174 175 if (cname->mctx == NULL) 176 return; 177 178 dns_name_free(&cname->cname, cname->mctx); 179 cname->mctx = NULL; 180} 181 182static inline isc_result_t 183additionaldata_cname(ARGS_ADDLDATA) { 184 UNUSED(rdata); 185 UNUSED(add); 186 UNUSED(arg); 187 188 REQUIRE(rdata->type == 5); 189 190 return (ISC_R_SUCCESS); 191} 192 193static inline isc_result_t 194digest_cname(ARGS_DIGEST) { 195 isc_region_t r; 196 dns_name_t name; 197 198 REQUIRE(rdata->type == 5); 199 200 dns_rdata_toregion(rdata, &r); 201 dns_name_init(&name, NULL); 202 dns_name_fromregion(&name, &r); 203 204 return (dns_name_digest(&name, digest, arg)); 205} 206 207static inline isc_boolean_t 208checkowner_cname(ARGS_CHECKOWNER) { 209 210 REQUIRE(type == 5); 211 212 UNUSED(name); 213 UNUSED(type); 214 UNUSED(rdclass); 215 UNUSED(wildcard); 216 217 return (ISC_TRUE); 218} 219 220static inline isc_boolean_t 221checknames_cname(ARGS_CHECKNAMES) { 222 223 REQUIRE(rdata->type == 5); 224 225 UNUSED(rdata); 226 UNUSED(owner); 227 UNUSED(bad); 228 229 return (ISC_TRUE); 230} 231 232static inline int 233casecompare_cname(ARGS_COMPARE) { 234 return (compare_cname(rdata1, rdata2)); 235} 236 237#endif /* RDATA_GENERIC_CNAME_5_C */ 238