1 /* $NetBSD: ptr_12.c,v 1.5 2020/05/24 19:46:24 christos Exp $ */ 2 3 /* 4 * Copyright (C) Internet Systems Consortium, Inc. ("ISC") 5 * 6 * This Source Code Form is subject to the terms of the Mozilla Public 7 * License, v. 2.0. If a copy of the MPL was not distributed with this 8 * file, You can obtain one at http://mozilla.org/MPL/2.0/. 9 * 10 * See the COPYRIGHT file distributed with this work for additional 11 * information regarding copyright ownership. 12 */ 13 14 #ifndef RDATA_GENERIC_PTR_12_C 15 #define RDATA_GENERIC_PTR_12_C 16 17 #define RRTYPE_PTR_ATTRIBUTES (0) 18 19 static inline isc_result_t 20 fromtext_ptr(ARGS_FROMTEXT) { 21 isc_token_t token; 22 dns_name_t name; 23 isc_buffer_t buffer; 24 25 REQUIRE(type == dns_rdatatype_ptr); 26 27 UNUSED(type); 28 UNUSED(rdclass); 29 UNUSED(callbacks); 30 31 RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_string, 32 false)); 33 34 dns_name_init(&name, NULL); 35 buffer_fromregion(&buffer, &token.value.as_region); 36 if (origin == NULL) { 37 origin = dns_rootname; 38 } 39 RETTOK(dns_name_fromtext(&name, &buffer, origin, options, target)); 40 if (rdclass == dns_rdataclass_in && 41 (options & DNS_RDATA_CHECKNAMES) != 0 && 42 (options & DNS_RDATA_CHECKREVERSE) != 0) 43 { 44 bool ok; 45 ok = dns_name_ishostname(&name, false); 46 if (!ok && (options & DNS_RDATA_CHECKNAMESFAIL) != 0) { 47 RETTOK(DNS_R_BADNAME); 48 } 49 if (!ok && callbacks != NULL) { 50 warn_badname(&name, lexer, callbacks); 51 } 52 } 53 return (ISC_R_SUCCESS); 54 } 55 56 static inline isc_result_t 57 totext_ptr(ARGS_TOTEXT) { 58 isc_region_t region; 59 dns_name_t name; 60 dns_name_t prefix; 61 bool sub; 62 63 REQUIRE(rdata->type == dns_rdatatype_ptr); 64 REQUIRE(rdata->length != 0); 65 66 dns_name_init(&name, NULL); 67 dns_name_init(&prefix, NULL); 68 69 dns_rdata_toregion(rdata, ®ion); 70 dns_name_fromregion(&name, ®ion); 71 72 sub = name_prefix(&name, tctx->origin, &prefix); 73 74 return (dns_name_totext(&prefix, sub, target)); 75 } 76 77 static inline isc_result_t 78 fromwire_ptr(ARGS_FROMWIRE) { 79 dns_name_t name; 80 81 REQUIRE(type == dns_rdatatype_ptr); 82 83 UNUSED(type); 84 UNUSED(rdclass); 85 86 dns_decompress_setmethods(dctx, DNS_COMPRESS_GLOBAL14); 87 88 dns_name_init(&name, NULL); 89 return (dns_name_fromwire(&name, source, dctx, options, target)); 90 } 91 92 static inline isc_result_t 93 towire_ptr(ARGS_TOWIRE) { 94 dns_name_t name; 95 dns_offsets_t offsets; 96 isc_region_t region; 97 98 REQUIRE(rdata->type == dns_rdatatype_ptr); 99 REQUIRE(rdata->length != 0); 100 101 dns_compress_setmethods(cctx, DNS_COMPRESS_GLOBAL14); 102 103 dns_name_init(&name, offsets); 104 dns_rdata_toregion(rdata, ®ion); 105 dns_name_fromregion(&name, ®ion); 106 107 return (dns_name_towire(&name, cctx, target)); 108 } 109 110 static inline int 111 compare_ptr(ARGS_COMPARE) { 112 dns_name_t name1; 113 dns_name_t name2; 114 isc_region_t region1; 115 isc_region_t region2; 116 117 REQUIRE(rdata1->type == rdata2->type); 118 REQUIRE(rdata1->rdclass == rdata2->rdclass); 119 REQUIRE(rdata1->type == dns_rdatatype_ptr); 120 REQUIRE(rdata1->length != 0); 121 REQUIRE(rdata2->length != 0); 122 123 dns_name_init(&name1, NULL); 124 dns_name_init(&name2, NULL); 125 126 dns_rdata_toregion(rdata1, ®ion1); 127 dns_rdata_toregion(rdata2, ®ion2); 128 129 dns_name_fromregion(&name1, ®ion1); 130 dns_name_fromregion(&name2, ®ion2); 131 132 return (dns_name_rdatacompare(&name1, &name2)); 133 } 134 135 static inline isc_result_t 136 fromstruct_ptr(ARGS_FROMSTRUCT) { 137 dns_rdata_ptr_t *ptr = source; 138 isc_region_t region; 139 140 REQUIRE(type == dns_rdatatype_ptr); 141 REQUIRE(ptr != NULL); 142 REQUIRE(ptr->common.rdtype == type); 143 REQUIRE(ptr->common.rdclass == rdclass); 144 145 UNUSED(type); 146 UNUSED(rdclass); 147 148 dns_name_toregion(&ptr->ptr, ®ion); 149 return (isc_buffer_copyregion(target, ®ion)); 150 } 151 152 static inline isc_result_t 153 tostruct_ptr(ARGS_TOSTRUCT) { 154 isc_region_t region; 155 dns_rdata_ptr_t *ptr = target; 156 dns_name_t name; 157 158 REQUIRE(rdata->type == dns_rdatatype_ptr); 159 REQUIRE(ptr != NULL); 160 REQUIRE(rdata->length != 0); 161 162 ptr->common.rdclass = rdata->rdclass; 163 ptr->common.rdtype = rdata->type; 164 ISC_LINK_INIT(&ptr->common, link); 165 166 dns_name_init(&name, NULL); 167 dns_rdata_toregion(rdata, ®ion); 168 dns_name_fromregion(&name, ®ion); 169 dns_name_init(&ptr->ptr, NULL); 170 RETERR(name_duporclone(&name, mctx, &ptr->ptr)); 171 ptr->mctx = mctx; 172 return (ISC_R_SUCCESS); 173 } 174 175 static inline void 176 freestruct_ptr(ARGS_FREESTRUCT) { 177 dns_rdata_ptr_t *ptr = source; 178 179 REQUIRE(ptr != NULL); 180 REQUIRE(ptr->common.rdtype == dns_rdatatype_ptr); 181 182 if (ptr->mctx == NULL) { 183 return; 184 } 185 186 dns_name_free(&ptr->ptr, ptr->mctx); 187 ptr->mctx = NULL; 188 } 189 190 static inline isc_result_t 191 additionaldata_ptr(ARGS_ADDLDATA) { 192 REQUIRE(rdata->type == dns_rdatatype_ptr); 193 194 UNUSED(rdata); 195 UNUSED(add); 196 UNUSED(arg); 197 198 return (ISC_R_SUCCESS); 199 } 200 201 static inline isc_result_t 202 digest_ptr(ARGS_DIGEST) { 203 isc_region_t r; 204 dns_name_t name; 205 206 REQUIRE(rdata->type == dns_rdatatype_ptr); 207 208 dns_rdata_toregion(rdata, &r); 209 dns_name_init(&name, NULL); 210 dns_name_fromregion(&name, &r); 211 212 return (dns_name_digest(&name, digest, arg)); 213 } 214 215 static inline bool 216 checkowner_ptr(ARGS_CHECKOWNER) { 217 REQUIRE(type == dns_rdatatype_ptr); 218 219 UNUSED(name); 220 UNUSED(type); 221 UNUSED(rdclass); 222 UNUSED(wildcard); 223 224 return (true); 225 } 226 227 static unsigned char ip6_arpa_data[] = "\003IP6\004ARPA"; 228 static unsigned char ip6_arpa_offsets[] = { 0, 4, 9 }; 229 static const dns_name_t ip6_arpa = DNS_NAME_INITABSOLUTE(ip6_arpa_data, 230 ip6_arpa_offsets); 231 232 static unsigned char ip6_int_data[] = "\003IP6\003INT"; 233 static unsigned char ip6_int_offsets[] = { 0, 4, 8 }; 234 static const dns_name_t ip6_int = DNS_NAME_INITABSOLUTE(ip6_int_data, 235 ip6_int_offsets); 236 237 static unsigned char in_addr_arpa_data[] = "\007IN-ADDR\004ARPA"; 238 static unsigned char in_addr_arpa_offsets[] = { 0, 8, 13 }; 239 static const dns_name_t in_addr_arpa = 240 DNS_NAME_INITABSOLUTE(in_addr_arpa_data, in_addr_arpa_offsets); 241 242 static inline bool 243 checknames_ptr(ARGS_CHECKNAMES) { 244 isc_region_t region; 245 dns_name_t name; 246 247 REQUIRE(rdata->type == dns_rdatatype_ptr); 248 249 if (rdata->rdclass != dns_rdataclass_in) { 250 return (true); 251 } 252 253 if (dns_name_isdnssd(owner)) { 254 return (true); 255 } 256 257 if (dns_name_issubdomain(owner, &in_addr_arpa) || 258 dns_name_issubdomain(owner, &ip6_arpa) || 259 dns_name_issubdomain(owner, &ip6_int)) 260 { 261 dns_rdata_toregion(rdata, ®ion); 262 dns_name_init(&name, NULL); 263 dns_name_fromregion(&name, ®ion); 264 if (!dns_name_ishostname(&name, false)) { 265 if (bad != NULL) { 266 dns_name_clone(&name, bad); 267 } 268 return (false); 269 } 270 } 271 return (true); 272 } 273 274 static inline int 275 casecompare_ptr(ARGS_COMPARE) { 276 return (compare_ptr(rdata1, rdata2)); 277 } 278 #endif /* RDATA_GENERIC_PTR_12_C */ 279