/contrib/bind9/lib/dns/rdata/in_1/a6_38.c
C | 466 lines | 343 code | 74 blank | 49 comment | 98 complexity | 330897ecea8db0d868c86e8ab5939499 MD5 | raw file
1/* 2 * Copyright (C) 2004, 2007, 2009 Internet Systems Consortium, Inc. ("ISC") 3 * Copyright (C) 1999-2003 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: a6_38.c,v 1.56 2009/12/04 22:06:37 tbox Exp $ */ 19 20/* RFC2874 */ 21 22#ifndef RDATA_IN_1_A6_28_C 23#define RDATA_IN_1_A6_28_C 24 25#include <isc/net.h> 26 27#define RRTYPE_A6_ATTRIBUTES (0) 28 29static inline isc_result_t 30fromtext_in_a6(ARGS_FROMTEXT) { 31 isc_token_t token; 32 unsigned char addr[16]; 33 unsigned char prefixlen; 34 unsigned char octets; 35 unsigned char mask; 36 dns_name_t name; 37 isc_buffer_t buffer; 38 isc_boolean_t ok; 39 40 REQUIRE(type == 38); 41 REQUIRE(rdclass == 1); 42 43 UNUSED(type); 44 UNUSED(rdclass); 45 UNUSED(callbacks); 46 47 /* 48 * Prefix length. 49 */ 50 RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_number, 51 ISC_FALSE)); 52 if (token.value.as_ulong > 128U) 53 RETTOK(ISC_R_RANGE); 54 55 prefixlen = (unsigned char)token.value.as_ulong; 56 RETERR(mem_tobuffer(target, &prefixlen, 1)); 57 58 /* 59 * Suffix. 60 */ 61 if (prefixlen != 128) { 62 /* 63 * Prefix 0..127. 64 */ 65 octets = prefixlen/8; 66 /* 67 * Octets 0..15. 68 */ 69 RETERR(isc_lex_getmastertoken(lexer, &token, 70 isc_tokentype_string, 71 ISC_FALSE)); 72 if (inet_pton(AF_INET6, DNS_AS_STR(token), addr) != 1) 73 RETTOK(DNS_R_BADAAAA); 74 mask = 0xff >> (prefixlen % 8); 75 addr[octets] &= mask; 76 RETERR(mem_tobuffer(target, &addr[octets], 16 - octets)); 77 } 78 79 if (prefixlen == 0) 80 return (ISC_R_SUCCESS); 81 82 RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_string, 83 ISC_FALSE)); 84 dns_name_init(&name, NULL); 85 buffer_fromregion(&buffer, &token.value.as_region); 86 origin = (origin != NULL) ? origin : dns_rootname; 87 RETTOK(dns_name_fromtext(&name, &buffer, origin, options, target)); 88 ok = ISC_TRUE; 89 if ((options & DNS_RDATA_CHECKNAMES) != 0) 90 ok = dns_name_ishostname(&name, ISC_FALSE); 91 if (!ok && (options & DNS_RDATA_CHECKNAMESFAIL) != 0) 92 RETTOK(DNS_R_BADNAME); 93 if (!ok && callbacks != NULL) 94 warn_badname(&name, lexer, callbacks); 95 return (ISC_R_SUCCESS); 96} 97 98static inline isc_result_t 99totext_in_a6(ARGS_TOTEXT) { 100 isc_region_t sr, ar; 101 unsigned char addr[16]; 102 unsigned char prefixlen; 103 unsigned char octets; 104 unsigned char mask; 105 char buf[sizeof("128")]; 106 dns_name_t name; 107 dns_name_t prefix; 108 isc_boolean_t sub; 109 110 REQUIRE(rdata->type == 38); 111 REQUIRE(rdata->rdclass == 1); 112 REQUIRE(rdata->length != 0); 113 114 dns_rdata_toregion(rdata, &sr); 115 prefixlen = sr.base[0]; 116 INSIST(prefixlen <= 128); 117 isc_region_consume(&sr, 1); 118 sprintf(buf, "%u", prefixlen); 119 RETERR(str_totext(buf, target)); 120 RETERR(str_totext(" ", target)); 121 122 if (prefixlen != 128) { 123 octets = prefixlen/8; 124 memset(addr, 0, sizeof(addr)); 125 memcpy(&addr[octets], sr.base, 16 - octets); 126 mask = 0xff >> (prefixlen % 8); 127 addr[octets] &= mask; 128 ar.base = addr; 129 ar.length = sizeof(addr); 130 RETERR(inet_totext(AF_INET6, &ar, target)); 131 isc_region_consume(&sr, 16 - octets); 132 } 133 134 if (prefixlen == 0) 135 return (ISC_R_SUCCESS); 136 137 RETERR(str_totext(" ", target)); 138 dns_name_init(&name, NULL); 139 dns_name_init(&prefix, NULL); 140 dns_name_fromregion(&name, &sr); 141 sub = name_prefix(&name, tctx->origin, &prefix); 142 return (dns_name_totext(&prefix, sub, target)); 143} 144 145static inline isc_result_t 146fromwire_in_a6(ARGS_FROMWIRE) { 147 isc_region_t sr; 148 unsigned char prefixlen; 149 unsigned char octets; 150 unsigned char mask; 151 dns_name_t name; 152 153 REQUIRE(type == 38); 154 REQUIRE(rdclass == 1); 155 156 UNUSED(type); 157 UNUSED(rdclass); 158 159 dns_decompress_setmethods(dctx, DNS_COMPRESS_NONE); 160 161 isc_buffer_activeregion(source, &sr); 162 /* 163 * Prefix length. 164 */ 165 if (sr.length < 1) 166 return (ISC_R_UNEXPECTEDEND); 167 prefixlen = sr.base[0]; 168 if (prefixlen > 128) 169 return (ISC_R_RANGE); 170 isc_region_consume(&sr, 1); 171 RETERR(mem_tobuffer(target, &prefixlen, 1)); 172 isc_buffer_forward(source, 1); 173 174 /* 175 * Suffix. 176 */ 177 if (prefixlen != 128) { 178 octets = 16 - prefixlen / 8; 179 if (sr.length < octets) 180 return (ISC_R_UNEXPECTEDEND); 181 mask = 0xff >> (prefixlen % 8); 182 sr.base[0] &= mask; /* Ensure pad bits are zero. */ 183 RETERR(mem_tobuffer(target, sr.base, octets)); 184 isc_buffer_forward(source, octets); 185 } 186 187 if (prefixlen == 0) 188 return (ISC_R_SUCCESS); 189 190 dns_name_init(&name, NULL); 191 return (dns_name_fromwire(&name, source, dctx, options, target)); 192} 193 194static inline isc_result_t 195towire_in_a6(ARGS_TOWIRE) { 196 isc_region_t sr; 197 dns_name_t name; 198 dns_offsets_t offsets; 199 unsigned char prefixlen; 200 unsigned char octets; 201 202 REQUIRE(rdata->type == 38); 203 REQUIRE(rdata->rdclass == 1); 204 REQUIRE(rdata->length != 0); 205 206 dns_compress_setmethods(cctx, DNS_COMPRESS_NONE); 207 dns_rdata_toregion(rdata, &sr); 208 prefixlen = sr.base[0]; 209 INSIST(prefixlen <= 128); 210 211 octets = 1 + 16 - prefixlen / 8; 212 RETERR(mem_tobuffer(target, sr.base, octets)); 213 isc_region_consume(&sr, octets); 214 215 if (prefixlen == 0) 216 return (ISC_R_SUCCESS); 217 218 dns_name_init(&name, offsets); 219 dns_name_fromregion(&name, &sr); 220 return (dns_name_towire(&name, cctx, target)); 221} 222 223static inline int 224compare_in_a6(ARGS_COMPARE) { 225 int order; 226 unsigned char prefixlen1, prefixlen2; 227 unsigned char octets; 228 dns_name_t name1; 229 dns_name_t name2; 230 isc_region_t region1; 231 isc_region_t region2; 232 233 REQUIRE(rdata1->type == rdata2->type); 234 REQUIRE(rdata1->rdclass == rdata2->rdclass); 235 REQUIRE(rdata1->type == 38); 236 REQUIRE(rdata1->rdclass == 1); 237 REQUIRE(rdata1->length != 0); 238 REQUIRE(rdata2->length != 0); 239 240 dns_rdata_toregion(rdata1, ®ion1); 241 dns_rdata_toregion(rdata2, ®ion2); 242 prefixlen1 = region1.base[0]; 243 prefixlen2 = region2.base[0]; 244 isc_region_consume(®ion1, 1); 245 isc_region_consume(®ion2, 1); 246 if (prefixlen1 < prefixlen2) 247 return (-1); 248 else if (prefixlen1 > prefixlen2) 249 return (1); 250 /* 251 * Prefix lengths are equal. 252 */ 253 octets = 16 - prefixlen1 / 8; 254 255 if (octets > 0) { 256 order = memcmp(region1.base, region2.base, octets); 257 if (order < 0) 258 return (-1); 259 else if (order > 0) 260 return (1); 261 /* 262 * Address suffixes are equal. 263 */ 264 if (prefixlen1 == 0) 265 return (order); 266 isc_region_consume(®ion1, octets); 267 isc_region_consume(®ion2, octets); 268 } 269 270 dns_name_init(&name1, NULL); 271 dns_name_init(&name2, NULL); 272 dns_name_fromregion(&name1, ®ion1); 273 dns_name_fromregion(&name2, ®ion2); 274 return (dns_name_rdatacompare(&name1, &name2)); 275} 276 277static inline isc_result_t 278fromstruct_in_a6(ARGS_FROMSTRUCT) { 279 dns_rdata_in_a6_t *a6 = source; 280 isc_region_t region; 281 int octets; 282 isc_uint8_t bits; 283 isc_uint8_t first; 284 isc_uint8_t mask; 285 286 REQUIRE(type == 38); 287 REQUIRE(rdclass == 1); 288 REQUIRE(source != NULL); 289 REQUIRE(a6->common.rdtype == type); 290 REQUIRE(a6->common.rdclass == rdclass); 291 292 UNUSED(type); 293 UNUSED(rdclass); 294 295 if (a6->prefixlen > 128) 296 return (ISC_R_RANGE); 297 298 RETERR(uint8_tobuffer(a6->prefixlen, target)); 299 300 /* Suffix */ 301 if (a6->prefixlen != 128) { 302 octets = 16 - a6->prefixlen / 8; 303 bits = a6->prefixlen % 8; 304 if (bits != 0) { 305 mask = 0xffU >> bits; 306 first = a6->in6_addr.s6_addr[16 - octets] & mask; 307 RETERR(uint8_tobuffer(first, target)); 308 octets--; 309 } 310 if (octets > 0) 311 RETERR(mem_tobuffer(target, 312 a6->in6_addr.s6_addr + 16 - octets, 313 octets)); 314 } 315 316 if (a6->prefixlen == 0) 317 return (ISC_R_SUCCESS); 318 dns_name_toregion(&a6->prefix, ®ion); 319 return (isc_buffer_copyregion(target, ®ion)); 320} 321 322static inline isc_result_t 323tostruct_in_a6(ARGS_TOSTRUCT) { 324 dns_rdata_in_a6_t *a6 = target; 325 unsigned char octets; 326 dns_name_t name; 327 isc_region_t r; 328 329 REQUIRE(rdata->type == 38); 330 REQUIRE(rdata->rdclass == 1); 331 REQUIRE(target != NULL); 332 REQUIRE(rdata->length != 0); 333 334 a6->common.rdclass = rdata->rdclass; 335 a6->common.rdtype = rdata->type; 336 ISC_LINK_INIT(&a6->common, link); 337 338 dns_rdata_toregion(rdata, &r); 339 340 a6->prefixlen = uint8_fromregion(&r); 341 isc_region_consume(&r, 1); 342 memset(a6->in6_addr.s6_addr, 0, sizeof(a6->in6_addr.s6_addr)); 343 344 /* 345 * Suffix. 346 */ 347 if (a6->prefixlen != 128) { 348 octets = 16 - a6->prefixlen / 8; 349 INSIST(r.length >= octets); 350 memcpy(a6->in6_addr.s6_addr + 16 - octets, r.base, octets); 351 isc_region_consume(&r, octets); 352 } 353 354 /* 355 * Prefix. 356 */ 357 dns_name_init(&a6->prefix, NULL); 358 if (a6->prefixlen != 0) { 359 dns_name_init(&name, NULL); 360 dns_name_fromregion(&name, &r); 361 RETERR(name_duporclone(&name, mctx, &a6->prefix)); 362 } 363 a6->mctx = mctx; 364 return (ISC_R_SUCCESS); 365} 366 367static inline void 368freestruct_in_a6(ARGS_FREESTRUCT) { 369 dns_rdata_in_a6_t *a6 = source; 370 371 REQUIRE(source != NULL); 372 REQUIRE(a6->common.rdclass == 1); 373 REQUIRE(a6->common.rdtype == 38); 374 375 if (a6->mctx == NULL) 376 return; 377 378 if (dns_name_dynamic(&a6->prefix)) 379 dns_name_free(&a6->prefix, a6->mctx); 380 a6->mctx = NULL; 381} 382 383static inline isc_result_t 384additionaldata_in_a6(ARGS_ADDLDATA) { 385 REQUIRE(rdata->type == 38); 386 REQUIRE(rdata->rdclass == 1); 387 388 UNUSED(rdata); 389 UNUSED(add); 390 UNUSED(arg); 391 392 return (ISC_R_SUCCESS); 393} 394 395static inline isc_result_t 396digest_in_a6(ARGS_DIGEST) { 397 isc_region_t r1, r2; 398 unsigned char prefixlen, octets; 399 isc_result_t result; 400 dns_name_t name; 401 402 REQUIRE(rdata->type == 38); 403 REQUIRE(rdata->rdclass == 1); 404 405 dns_rdata_toregion(rdata, &r1); 406 r2 = r1; 407 prefixlen = r1.base[0]; 408 octets = 1 + 16 - prefixlen / 8; 409 410 r1.length = octets; 411 result = (digest)(arg, &r1); 412 if (result != ISC_R_SUCCESS) 413 return (result); 414 if (prefixlen == 0) 415 return (ISC_R_SUCCESS); 416 417 isc_region_consume(&r2, octets); 418 dns_name_init(&name, NULL); 419 dns_name_fromregion(&name, &r2); 420 return (dns_name_digest(&name, digest, arg)); 421} 422 423static inline isc_boolean_t 424checkowner_in_a6(ARGS_CHECKOWNER) { 425 426 REQUIRE(type == 38); 427 REQUIRE(rdclass == 1); 428 429 UNUSED(type); 430 UNUSED(rdclass); 431 432 return (dns_name_ishostname(name, wildcard)); 433} 434 435static inline isc_boolean_t 436checknames_in_a6(ARGS_CHECKNAMES) { 437 isc_region_t region; 438 dns_name_t name; 439 unsigned int prefixlen; 440 441 REQUIRE(rdata->type == 38); 442 REQUIRE(rdata->rdclass == 1); 443 444 UNUSED(owner); 445 446 dns_rdata_toregion(rdata, ®ion); 447 prefixlen = uint8_fromregion(®ion); 448 if (prefixlen == 0) 449 return (ISC_TRUE); 450 isc_region_consume(®ion, 1 + 16 - prefixlen / 8); 451 dns_name_init(&name, NULL); 452 dns_name_fromregion(&name, ®ion); 453 if (!dns_name_ishostname(&name, ISC_FALSE)) { 454 if (bad != NULL) 455 dns_name_clone(&name, bad); 456 return (ISC_FALSE); 457 } 458 return (ISC_TRUE); 459} 460 461static inline int 462casecompare_in_a6(ARGS_COMPARE) { 463 return (compare_in_a6(rdata1, rdata2)); 464} 465 466#endif /* RDATA_IN_1_A6_38_C */