1 /* $NetBSD: kx_36.c,v 1.9 2025/01/26 16:25:35 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 /* RFC2230 */ 17 18 #ifndef RDATA_IN_1_KX_36_C 19 #define RDATA_IN_1_KX_36_C 20 21 #define RRTYPE_KX_ATTRIBUTES (0) 22 23 static isc_result_t 24 fromtext_in_kx(ARGS_FROMTEXT) { 25 isc_token_t token; 26 dns_name_t name; 27 isc_buffer_t buffer; 28 29 REQUIRE(type == dns_rdatatype_kx); 30 REQUIRE(rdclass == dns_rdataclass_in); 31 32 UNUSED(type); 33 UNUSED(rdclass); 34 UNUSED(callbacks); 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 RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_string, 44 false)); 45 dns_name_init(&name, NULL); 46 buffer_fromregion(&buffer, &token.value.as_region); 47 if (origin == NULL) { 48 origin = dns_rootname; 49 } 50 RETTOK(dns_name_fromtext(&name, &buffer, origin, options, target)); 51 return ISC_R_SUCCESS; 52 } 53 54 static isc_result_t 55 totext_in_kx(ARGS_TOTEXT) { 56 isc_region_t region; 57 dns_name_t name; 58 dns_name_t prefix; 59 unsigned int opts; 60 char buf[sizeof("64000")]; 61 unsigned short num; 62 63 REQUIRE(rdata->type == dns_rdatatype_kx); 64 REQUIRE(rdata->rdclass == dns_rdataclass_in); 65 REQUIRE(rdata->length != 0); 66 67 dns_name_init(&name, NULL); 68 dns_name_init(&prefix, NULL); 69 70 dns_rdata_toregion(rdata, ®ion); 71 num = uint16_fromregion(®ion); 72 isc_region_consume(®ion, 2); 73 snprintf(buf, sizeof(buf), "%u", num); 74 RETERR(str_totext(buf, target)); 75 76 RETERR(str_totext(" ", target)); 77 78 dns_name_fromregion(&name, ®ion); 79 opts = name_prefix(&name, tctx->origin, &prefix) ? DNS_NAME_OMITFINALDOT 80 : 0; 81 return dns_name_totext(&prefix, opts, target); 82 } 83 84 static isc_result_t 85 fromwire_in_kx(ARGS_FROMWIRE) { 86 dns_name_t name; 87 isc_region_t sregion; 88 89 REQUIRE(type == dns_rdatatype_kx); 90 REQUIRE(rdclass == dns_rdataclass_in); 91 92 UNUSED(type); 93 UNUSED(rdclass); 94 95 dctx = dns_decompress_setpermitted(dctx, false); 96 97 dns_name_init(&name, NULL); 98 99 isc_buffer_activeregion(source, &sregion); 100 if (sregion.length < 2) { 101 return ISC_R_UNEXPECTEDEND; 102 } 103 RETERR(mem_tobuffer(target, sregion.base, 2)); 104 isc_buffer_forward(source, 2); 105 return dns_name_fromwire(&name, source, dctx, target); 106 } 107 108 static isc_result_t 109 towire_in_kx(ARGS_TOWIRE) { 110 dns_name_t name; 111 dns_offsets_t offsets; 112 isc_region_t region; 113 114 REQUIRE(rdata->type == dns_rdatatype_kx); 115 REQUIRE(rdata->rdclass == dns_rdataclass_in); 116 REQUIRE(rdata->length != 0); 117 118 dns_compress_setpermitted(cctx, false); 119 dns_rdata_toregion(rdata, ®ion); 120 RETERR(mem_tobuffer(target, region.base, 2)); 121 isc_region_consume(®ion, 2); 122 123 dns_name_init(&name, offsets); 124 dns_name_fromregion(&name, ®ion); 125 126 return dns_name_towire(&name, cctx, target, NULL); 127 } 128 129 static int 130 compare_in_kx(ARGS_COMPARE) { 131 dns_name_t name1; 132 dns_name_t name2; 133 isc_region_t region1; 134 isc_region_t region2; 135 int order; 136 137 REQUIRE(rdata1->type == rdata2->type); 138 REQUIRE(rdata1->rdclass == rdata2->rdclass); 139 REQUIRE(rdata1->type == dns_rdatatype_kx); 140 REQUIRE(rdata1->rdclass == dns_rdataclass_in); 141 REQUIRE(rdata1->length != 0); 142 REQUIRE(rdata2->length != 0); 143 144 order = memcmp(rdata1->data, rdata2->data, 2); 145 if (order != 0) { 146 return order < 0 ? -1 : 1; 147 } 148 149 dns_name_init(&name1, NULL); 150 dns_name_init(&name2, NULL); 151 152 dns_rdata_toregion(rdata1, ®ion1); 153 dns_rdata_toregion(rdata2, ®ion2); 154 155 isc_region_consume(®ion1, 2); 156 isc_region_consume(®ion2, 2); 157 158 dns_name_fromregion(&name1, ®ion1); 159 dns_name_fromregion(&name2, ®ion2); 160 161 return dns_name_rdatacompare(&name1, &name2); 162 } 163 164 static isc_result_t 165 fromstruct_in_kx(ARGS_FROMSTRUCT) { 166 dns_rdata_in_kx_t *kx = source; 167 isc_region_t region; 168 169 REQUIRE(type == dns_rdatatype_kx); 170 REQUIRE(rdclass == dns_rdataclass_in); 171 REQUIRE(kx != NULL); 172 REQUIRE(kx->common.rdtype == type); 173 REQUIRE(kx->common.rdclass == rdclass); 174 175 UNUSED(type); 176 UNUSED(rdclass); 177 178 RETERR(uint16_tobuffer(kx->preference, target)); 179 dns_name_toregion(&kx->exchange, ®ion); 180 return isc_buffer_copyregion(target, ®ion); 181 } 182 183 static isc_result_t 184 tostruct_in_kx(ARGS_TOSTRUCT) { 185 isc_region_t region; 186 dns_rdata_in_kx_t *kx = target; 187 dns_name_t name; 188 189 REQUIRE(rdata->type == dns_rdatatype_kx); 190 REQUIRE(rdata->rdclass == dns_rdataclass_in); 191 REQUIRE(kx != NULL); 192 REQUIRE(rdata->length != 0); 193 194 kx->common.rdclass = rdata->rdclass; 195 kx->common.rdtype = rdata->type; 196 ISC_LINK_INIT(&kx->common, link); 197 198 dns_name_init(&name, NULL); 199 dns_rdata_toregion(rdata, ®ion); 200 201 kx->preference = uint16_fromregion(®ion); 202 isc_region_consume(®ion, 2); 203 204 dns_name_fromregion(&name, ®ion); 205 dns_name_init(&kx->exchange, NULL); 206 name_duporclone(&name, mctx, &kx->exchange); 207 kx->mctx = mctx; 208 return ISC_R_SUCCESS; 209 } 210 211 static void 212 freestruct_in_kx(ARGS_FREESTRUCT) { 213 dns_rdata_in_kx_t *kx = source; 214 215 REQUIRE(kx != NULL); 216 REQUIRE(kx->common.rdclass == dns_rdataclass_in); 217 REQUIRE(kx->common.rdtype == dns_rdatatype_kx); 218 219 if (kx->mctx == NULL) { 220 return; 221 } 222 223 dns_name_free(&kx->exchange, kx->mctx); 224 kx->mctx = NULL; 225 } 226 227 static isc_result_t 228 additionaldata_in_kx(ARGS_ADDLDATA) { 229 dns_name_t name; 230 dns_offsets_t offsets; 231 isc_region_t region; 232 233 REQUIRE(rdata->type == dns_rdatatype_kx); 234 REQUIRE(rdata->rdclass == dns_rdataclass_in); 235 236 UNUSED(owner); 237 238 dns_name_init(&name, offsets); 239 dns_rdata_toregion(rdata, ®ion); 240 isc_region_consume(®ion, 2); 241 dns_name_fromregion(&name, ®ion); 242 243 return (add)(arg, &name, dns_rdatatype_a, NULL DNS__DB_FILELINE); 244 } 245 246 static isc_result_t 247 digest_in_kx(ARGS_DIGEST) { 248 isc_region_t r1, r2; 249 dns_name_t name; 250 251 REQUIRE(rdata->type == dns_rdatatype_kx); 252 REQUIRE(rdata->rdclass == dns_rdataclass_in); 253 254 dns_rdata_toregion(rdata, &r1); 255 r2 = r1; 256 isc_region_consume(&r2, 2); 257 r1.length = 2; 258 RETERR((digest)(arg, &r1)); 259 dns_name_init(&name, NULL); 260 dns_name_fromregion(&name, &r2); 261 return dns_name_digest(&name, digest, arg); 262 } 263 264 static bool 265 checkowner_in_kx(ARGS_CHECKOWNER) { 266 REQUIRE(type == dns_rdatatype_kx); 267 REQUIRE(rdclass == dns_rdataclass_in); 268 269 UNUSED(name); 270 UNUSED(type); 271 UNUSED(rdclass); 272 UNUSED(wildcard); 273 274 return true; 275 } 276 277 static bool 278 checknames_in_kx(ARGS_CHECKNAMES) { 279 REQUIRE(rdata->type == dns_rdatatype_kx); 280 REQUIRE(rdata->rdclass == dns_rdataclass_in); 281 282 UNUSED(rdata); 283 UNUSED(owner); 284 UNUSED(bad); 285 286 return true; 287 } 288 289 static int 290 casecompare_in_kx(ARGS_COMPARE) { 291 return compare_in_kx(rdata1, rdata2); 292 } 293 294 #endif /* RDATA_IN_1_KX_36_C */ 295