1 /* $NetBSD: uri_256.c,v 1.9 2025/01/26 16:25:34 christos Exp $ */ 2 3 /* 4 * Copyright (C) Internet Systems Consortium, Inc. ("ISC") 5 * 6 * SPDX-License-Identifier: MPL-2.0 7 * 8 * This Source Code Form is subject to the terms of the Mozilla Public 9 * License, v. 2.0. If a copy of the MPL was not distributed with this 10 * file, you can obtain one at https://mozilla.org/MPL/2.0/. 11 * 12 * See the COPYRIGHT file distributed with this work for additional 13 * information regarding copyright ownership. 14 */ 15 16 #ifndef GENERIC_URI_256_C 17 #define GENERIC_URI_256_C 1 18 19 #define RRTYPE_URI_ATTRIBUTES (0) 20 21 static isc_result_t 22 fromtext_uri(ARGS_FROMTEXT) { 23 isc_token_t token; 24 25 REQUIRE(type == dns_rdatatype_uri); 26 27 UNUSED(type); 28 UNUSED(rdclass); 29 UNUSED(origin); 30 UNUSED(options); 31 UNUSED(callbacks); 32 33 /* 34 * Priority 35 */ 36 RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_number, 37 false)); 38 if (token.value.as_ulong > 0xffffU) { 39 RETTOK(ISC_R_RANGE); 40 } 41 RETERR(uint16_tobuffer(token.value.as_ulong, target)); 42 43 /* 44 * Weight 45 */ 46 RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_number, 47 false)); 48 if (token.value.as_ulong > 0xffffU) { 49 RETTOK(ISC_R_RANGE); 50 } 51 RETERR(uint16_tobuffer(token.value.as_ulong, target)); 52 53 /* 54 * Target URI 55 */ 56 RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_qstring, 57 false)); 58 if (token.type != isc_tokentype_qstring) { 59 RETTOK(DNS_R_SYNTAX); 60 } 61 RETTOK(multitxt_fromtext(&token.value.as_textregion, target)); 62 return ISC_R_SUCCESS; 63 } 64 65 static isc_result_t 66 totext_uri(ARGS_TOTEXT) { 67 isc_region_t region; 68 unsigned short priority, weight; 69 char buf[sizeof("65000 ")]; 70 71 UNUSED(tctx); 72 73 REQUIRE(rdata->type == dns_rdatatype_uri); 74 REQUIRE(rdata->length != 0); 75 76 dns_rdata_toregion(rdata, ®ion); 77 78 /* 79 * Priority 80 */ 81 priority = uint16_fromregion(®ion); 82 isc_region_consume(®ion, 2); 83 snprintf(buf, sizeof(buf), "%u ", priority); 84 RETERR(str_totext(buf, target)); 85 86 /* 87 * Weight 88 */ 89 weight = uint16_fromregion(®ion); 90 isc_region_consume(®ion, 2); 91 snprintf(buf, sizeof(buf), "%u ", weight); 92 RETERR(str_totext(buf, target)); 93 94 /* 95 * Target URI 96 */ 97 RETERR(multitxt_totext(®ion, target)); 98 return ISC_R_SUCCESS; 99 } 100 101 static isc_result_t 102 fromwire_uri(ARGS_FROMWIRE) { 103 isc_region_t region; 104 105 REQUIRE(type == dns_rdatatype_uri); 106 107 UNUSED(type); 108 UNUSED(rdclass); 109 UNUSED(dctx); 110 111 /* 112 * Priority, weight 113 */ 114 isc_buffer_activeregion(source, ®ion); 115 if (region.length < 4) { 116 return ISC_R_UNEXPECTEDEND; 117 } 118 119 /* 120 * Priority, weight and target URI 121 */ 122 isc_buffer_forward(source, region.length); 123 return mem_tobuffer(target, region.base, region.length); 124 } 125 126 static isc_result_t 127 towire_uri(ARGS_TOWIRE) { 128 isc_region_t region; 129 130 REQUIRE(rdata->type == dns_rdatatype_uri); 131 REQUIRE(rdata->length != 0); 132 133 UNUSED(cctx); 134 135 dns_rdata_toregion(rdata, ®ion); 136 return mem_tobuffer(target, region.base, region.length); 137 } 138 139 static int 140 compare_uri(ARGS_COMPARE) { 141 isc_region_t r1; 142 isc_region_t r2; 143 int order; 144 145 REQUIRE(rdata1->type == rdata2->type); 146 REQUIRE(rdata1->rdclass == rdata2->rdclass); 147 REQUIRE(rdata1->type == dns_rdatatype_uri); 148 REQUIRE(rdata1->length != 0); 149 REQUIRE(rdata2->length != 0); 150 151 dns_rdata_toregion(rdata1, &r1); 152 dns_rdata_toregion(rdata2, &r2); 153 154 /* 155 * Priority 156 */ 157 order = memcmp(r1.base, r2.base, 2); 158 if (order != 0) { 159 return order < 0 ? -1 : 1; 160 } 161 isc_region_consume(&r1, 2); 162 isc_region_consume(&r2, 2); 163 164 /* 165 * Weight 166 */ 167 order = memcmp(r1.base, r2.base, 2); 168 if (order != 0) { 169 return order < 0 ? -1 : 1; 170 } 171 isc_region_consume(&r1, 2); 172 isc_region_consume(&r2, 2); 173 174 return isc_region_compare(&r1, &r2); 175 } 176 177 static isc_result_t 178 fromstruct_uri(ARGS_FROMSTRUCT) { 179 dns_rdata_uri_t *uri = source; 180 181 REQUIRE(type == dns_rdatatype_uri); 182 REQUIRE(uri != NULL); 183 REQUIRE(uri->common.rdtype == type); 184 REQUIRE(uri->common.rdclass == rdclass); 185 REQUIRE(uri->target != NULL && uri->tgt_len != 0); 186 187 UNUSED(type); 188 UNUSED(rdclass); 189 190 /* 191 * Priority 192 */ 193 RETERR(uint16_tobuffer(uri->priority, target)); 194 195 /* 196 * Weight 197 */ 198 RETERR(uint16_tobuffer(uri->weight, target)); 199 200 /* 201 * Target URI 202 */ 203 return mem_tobuffer(target, uri->target, uri->tgt_len); 204 } 205 206 static isc_result_t 207 tostruct_uri(ARGS_TOSTRUCT) { 208 dns_rdata_uri_t *uri = target; 209 isc_region_t sr; 210 211 REQUIRE(rdata->type == dns_rdatatype_uri); 212 REQUIRE(uri != NULL); 213 REQUIRE(rdata->length >= 4); 214 215 uri->common.rdclass = rdata->rdclass; 216 uri->common.rdtype = rdata->type; 217 ISC_LINK_INIT(&uri->common, link); 218 219 dns_rdata_toregion(rdata, &sr); 220 221 /* 222 * Priority 223 */ 224 uri->priority = uint16_fromregion(&sr); 225 isc_region_consume(&sr, 2); 226 227 /* 228 * Weight 229 */ 230 uri->weight = uint16_fromregion(&sr); 231 isc_region_consume(&sr, 2); 232 233 /* 234 * Target URI 235 */ 236 uri->tgt_len = sr.length; 237 uri->target = mem_maybedup(mctx, sr.base, sr.length); 238 uri->mctx = mctx; 239 return ISC_R_SUCCESS; 240 } 241 242 static void 243 freestruct_uri(ARGS_FREESTRUCT) { 244 dns_rdata_uri_t *uri = (dns_rdata_uri_t *)source; 245 246 REQUIRE(uri != NULL); 247 REQUIRE(uri->common.rdtype == dns_rdatatype_uri); 248 249 if (uri->mctx == NULL) { 250 return; 251 } 252 253 if (uri->target != NULL) { 254 isc_mem_free(uri->mctx, uri->target); 255 } 256 uri->mctx = NULL; 257 } 258 259 static isc_result_t 260 additionaldata_uri(ARGS_ADDLDATA) { 261 REQUIRE(rdata->type == dns_rdatatype_uri); 262 263 UNUSED(rdata); 264 UNUSED(owner); 265 UNUSED(add); 266 UNUSED(arg); 267 268 return ISC_R_SUCCESS; 269 } 270 271 static isc_result_t 272 digest_uri(ARGS_DIGEST) { 273 isc_region_t r; 274 275 REQUIRE(rdata->type == dns_rdatatype_uri); 276 277 dns_rdata_toregion(rdata, &r); 278 279 return (digest)(arg, &r); 280 } 281 282 static bool 283 checkowner_uri(ARGS_CHECKOWNER) { 284 REQUIRE(type == dns_rdatatype_uri); 285 286 UNUSED(name); 287 UNUSED(type); 288 UNUSED(rdclass); 289 UNUSED(wildcard); 290 291 return true; 292 } 293 294 static bool 295 checknames_uri(ARGS_CHECKNAMES) { 296 REQUIRE(rdata->type == dns_rdatatype_uri); 297 298 UNUSED(rdata); 299 UNUSED(owner); 300 UNUSED(bad); 301 302 return true; 303 } 304 305 static int 306 casecompare_uri(ARGS_COMPARE) { 307 return compare_uri(rdata1, rdata2); 308 } 309 310 #endif /* GENERIC_URI_256_C */ 311