1 /* $NetBSD: mx_15.c,v 1.5 2014/12/10 04:37:59 christos Exp $ */ 2 3 /* 4 * Copyright (C) 2004, 2005, 2007, 2009, 2012 Internet Systems Consortium, Inc. ("ISC") 5 * Copyright (C) 1998-2001, 2003 Internet Software Consortium. 6 * 7 * Permission to use, copy, modify, and/or distribute this software for any 8 * purpose with or without fee is hereby granted, provided that the above 9 * copyright notice and this permission notice appear in all copies. 10 * 11 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH 12 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY 13 * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT, 14 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM 15 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE 16 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR 17 * PERFORMANCE OF THIS SOFTWARE. 18 */ 19 20 /* Id: mx_15.c,v 1.58 2009/12/04 22:06:37 tbox Exp */ 21 22 /* reviewed: Wed Mar 15 18:05:46 PST 2000 by brister */ 23 24 #ifndef RDATA_GENERIC_MX_15_C 25 #define RDATA_GENERIC_MX_15_C 26 27 #include <string.h> 28 29 #include <isc/net.h> 30 31 #define RRTYPE_MX_ATTRIBUTES (0) 32 33 static isc_boolean_t 34 check_mx(isc_token_t *token) { 35 char tmp[sizeof("xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:123.123.123.123.")]; 36 struct in_addr addr; 37 struct in6_addr addr6; 38 39 if (strlcpy(tmp, DNS_AS_STR(*token), sizeof(tmp)) >= sizeof(tmp)) 40 return (ISC_TRUE); 41 42 if (tmp[strlen(tmp) - 1] == '.') 43 tmp[strlen(tmp) - 1] = '\0'; 44 if (inet_aton(tmp, &addr) == 1 || 45 inet_pton(AF_INET6, tmp, &addr6) == 1) 46 return (ISC_FALSE); 47 48 return (ISC_TRUE); 49 } 50 51 static inline isc_result_t 52 fromtext_mx(ARGS_FROMTEXT) { 53 isc_token_t token; 54 dns_name_t name; 55 isc_buffer_t buffer; 56 isc_boolean_t ok; 57 58 REQUIRE(type == 15); 59 60 UNUSED(type); 61 UNUSED(rdclass); 62 63 RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_number, 64 ISC_FALSE)); 65 if (token.value.as_ulong > 0xffffU) 66 RETTOK(ISC_R_RANGE); 67 RETERR(uint16_tobuffer(token.value.as_ulong, target)); 68 69 RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_string, 70 ISC_FALSE)); 71 72 ok = ISC_TRUE; 73 if ((options & DNS_RDATA_CHECKMX) != 0) 74 ok = check_mx(&token); 75 if (!ok && (options & DNS_RDATA_CHECKMXFAIL) != 0) 76 RETTOK(DNS_R_MXISADDRESS); 77 if (!ok && callbacks != NULL) 78 warn_badmx(&token, lexer, callbacks); 79 80 dns_name_init(&name, NULL); 81 buffer_fromregion(&buffer, &token.value.as_region); 82 origin = (origin != NULL) ? origin : dns_rootname; 83 RETTOK(dns_name_fromtext(&name, &buffer, origin, options, target)); 84 ok = ISC_TRUE; 85 if ((options & DNS_RDATA_CHECKNAMES) != 0) 86 ok = dns_name_ishostname(&name, ISC_FALSE); 87 if (!ok && (options & DNS_RDATA_CHECKNAMESFAIL) != 0) 88 RETTOK(DNS_R_BADNAME); 89 if (!ok && callbacks != NULL) 90 warn_badname(&name, lexer, callbacks); 91 return (ISC_R_SUCCESS); 92 } 93 94 static inline isc_result_t 95 totext_mx(ARGS_TOTEXT) { 96 isc_region_t region; 97 dns_name_t name; 98 dns_name_t prefix; 99 isc_boolean_t sub; 100 char buf[sizeof("64000")]; 101 unsigned short num; 102 103 REQUIRE(rdata->type == 15); 104 REQUIRE(rdata->length != 0); 105 106 dns_name_init(&name, NULL); 107 dns_name_init(&prefix, NULL); 108 109 dns_rdata_toregion(rdata, ®ion); 110 num = uint16_fromregion(®ion); 111 isc_region_consume(®ion, 2); 112 sprintf(buf, "%u", num); 113 RETERR(str_totext(buf, target)); 114 115 RETERR(str_totext(" ", target)); 116 117 dns_name_fromregion(&name, ®ion); 118 sub = name_prefix(&name, tctx->origin, &prefix); 119 return (dns_name_totext(&prefix, sub, target)); 120 } 121 122 static inline isc_result_t 123 fromwire_mx(ARGS_FROMWIRE) { 124 dns_name_t name; 125 isc_region_t sregion; 126 127 REQUIRE(type == 15); 128 129 UNUSED(type); 130 UNUSED(rdclass); 131 132 dns_decompress_setmethods(dctx, DNS_COMPRESS_GLOBAL14); 133 134 dns_name_init(&name, NULL); 135 136 isc_buffer_activeregion(source, &sregion); 137 if (sregion.length < 2) 138 return (ISC_R_UNEXPECTEDEND); 139 RETERR(mem_tobuffer(target, sregion.base, 2)); 140 isc_buffer_forward(source, 2); 141 return (dns_name_fromwire(&name, source, dctx, options, target)); 142 } 143 144 static inline isc_result_t 145 towire_mx(ARGS_TOWIRE) { 146 dns_name_t name; 147 dns_offsets_t offsets; 148 isc_region_t region; 149 150 REQUIRE(rdata->type == 15); 151 REQUIRE(rdata->length != 0); 152 153 dns_compress_setmethods(cctx, DNS_COMPRESS_GLOBAL14); 154 155 dns_rdata_toregion(rdata, ®ion); 156 RETERR(mem_tobuffer(target, region.base, 2)); 157 isc_region_consume(®ion, 2); 158 159 dns_name_init(&name, offsets); 160 dns_name_fromregion(&name, ®ion); 161 162 return (dns_name_towire(&name, cctx, target)); 163 } 164 165 static inline int 166 compare_mx(ARGS_COMPARE) { 167 dns_name_t name1; 168 dns_name_t name2; 169 isc_region_t region1; 170 isc_region_t region2; 171 int order; 172 173 REQUIRE(rdata1->type == rdata2->type); 174 REQUIRE(rdata1->rdclass == rdata2->rdclass); 175 REQUIRE(rdata1->type == 15); 176 REQUIRE(rdata1->length != 0); 177 REQUIRE(rdata2->length != 0); 178 179 order = memcmp(rdata1->data, rdata2->data, 2); 180 if (order != 0) 181 return (order < 0 ? -1 : 1); 182 183 dns_name_init(&name1, NULL); 184 dns_name_init(&name2, NULL); 185 186 dns_rdata_toregion(rdata1, ®ion1); 187 dns_rdata_toregion(rdata2, ®ion2); 188 189 isc_region_consume(®ion1, 2); 190 isc_region_consume(®ion2, 2); 191 192 dns_name_fromregion(&name1, ®ion1); 193 dns_name_fromregion(&name2, ®ion2); 194 195 return (dns_name_rdatacompare(&name1, &name2)); 196 } 197 198 static inline isc_result_t 199 fromstruct_mx(ARGS_FROMSTRUCT) { 200 dns_rdata_mx_t *mx = source; 201 isc_region_t region; 202 203 REQUIRE(type == 15); 204 REQUIRE(source != NULL); 205 REQUIRE(mx->common.rdtype == type); 206 REQUIRE(mx->common.rdclass == rdclass); 207 208 UNUSED(type); 209 UNUSED(rdclass); 210 211 RETERR(uint16_tobuffer(mx->pref, target)); 212 dns_name_toregion(&mx->mx, ®ion); 213 return (isc_buffer_copyregion(target, ®ion)); 214 } 215 216 static inline isc_result_t 217 tostruct_mx(ARGS_TOSTRUCT) { 218 isc_region_t region; 219 dns_rdata_mx_t *mx = target; 220 dns_name_t name; 221 222 REQUIRE(rdata->type == 15); 223 REQUIRE(target != NULL); 224 REQUIRE(rdata->length != 0); 225 226 mx->common.rdclass = rdata->rdclass; 227 mx->common.rdtype = rdata->type; 228 ISC_LINK_INIT(&mx->common, link); 229 230 dns_name_init(&name, NULL); 231 dns_rdata_toregion(rdata, ®ion); 232 mx->pref = uint16_fromregion(®ion); 233 isc_region_consume(®ion, 2); 234 dns_name_fromregion(&name, ®ion); 235 dns_name_init(&mx->mx, NULL); 236 RETERR(name_duporclone(&name, mctx, &mx->mx)); 237 mx->mctx = mctx; 238 return (ISC_R_SUCCESS); 239 } 240 241 static inline void 242 freestruct_mx(ARGS_FREESTRUCT) { 243 dns_rdata_mx_t *mx = source; 244 245 REQUIRE(source != NULL); 246 REQUIRE(mx->common.rdtype == 15); 247 248 if (mx->mctx == NULL) 249 return; 250 251 dns_name_free(&mx->mx, mx->mctx); 252 mx->mctx = NULL; 253 } 254 255 static inline isc_result_t 256 additionaldata_mx(ARGS_ADDLDATA) { 257 dns_name_t name; 258 dns_offsets_t offsets; 259 isc_region_t region; 260 261 REQUIRE(rdata->type == 15); 262 263 dns_name_init(&name, offsets); 264 dns_rdata_toregion(rdata, ®ion); 265 isc_region_consume(®ion, 2); 266 dns_name_fromregion(&name, ®ion); 267 268 return ((add)(arg, &name, dns_rdatatype_a)); 269 } 270 271 static inline isc_result_t 272 digest_mx(ARGS_DIGEST) { 273 isc_region_t r1, r2; 274 dns_name_t name; 275 276 REQUIRE(rdata->type == 15); 277 278 dns_rdata_toregion(rdata, &r1); 279 r2 = r1; 280 isc_region_consume(&r2, 2); 281 r1.length = 2; 282 RETERR((digest)(arg, &r1)); 283 dns_name_init(&name, NULL); 284 dns_name_fromregion(&name, &r2); 285 return (dns_name_digest(&name, digest, arg)); 286 } 287 288 static inline isc_boolean_t 289 checkowner_mx(ARGS_CHECKOWNER) { 290 291 REQUIRE(type == 15); 292 293 UNUSED(type); 294 UNUSED(rdclass); 295 296 return (dns_name_ishostname(name, wildcard)); 297 } 298 299 static inline isc_boolean_t 300 checknames_mx(ARGS_CHECKNAMES) { 301 isc_region_t region; 302 dns_name_t name; 303 304 REQUIRE(rdata->type == 15); 305 306 UNUSED(owner); 307 308 dns_rdata_toregion(rdata, ®ion); 309 isc_region_consume(®ion, 2); 310 dns_name_init(&name, NULL); 311 dns_name_fromregion(&name, ®ion); 312 if (!dns_name_ishostname(&name, ISC_FALSE)) { 313 if (bad != NULL) 314 dns_name_clone(&name, bad); 315 return (ISC_FALSE); 316 } 317 return (ISC_TRUE); 318 } 319 320 static inline int 321 casecompare_mx(ARGS_COMPARE) { 322 return (compare_mx(rdata1, rdata2)); 323 } 324 325 #endif /* RDATA_GENERIC_MX_15_C */ 326