contrib/bind-9.3/lib/dns/rdata/generic/soa_6.c

   1 /*
   2  * Copyright (C) 2004  Internet Systems Consortium, Inc. ("ISC")
   3  * Copyright (C) 1998-2002  Internet Software Consortium.
   4  *
   5  * Permission to use, copy, modify, and 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: soa_6.c,v 1.53.12.6 2004/03/08 09:04:42 marka Exp $ */
  19
  20 /* Reviewed: Thu Mar 16 15:18:32 PST 2000 by explorer */
  21
  22 #ifndef RDATA_GENERIC_SOA_6_C
  23 #define RDATA_GENERIC_SOA_6_C
  24
  25 #define RRTYPE_SOA_ATTRIBUTES (DNS_RDATATYPEATTR_SINGLETON)
  26
  27 static inline isc_result_t
  28 fromtext_soa(ARGS_FROMTEXT) {
  29         isc_token_t token;
  30         dns_name_t name;
  31         isc_buffer_t buffer;
  32         int i;
  33         isc_uint32_t n;
  34         isc_boolean_t ok;
  35
  36         REQUIRE(type == 6);
  37
  38         UNUSED(type);
  39         UNUSED(rdclass);
  40         UNUSED(callbacks);
  41
  42         origin = (origin != NULL) ? origin : dns_rootname;
  43
  44         for (i = 0; i < 2; i++) {
  45                 RETERR(isc_lex_getmastertoken(lexer, &token,
  46                                               isc_tokentype_string,
  47                                               ISC_FALSE));
  48
  49                 dns_name_init(&name, NULL);
  50                 buffer_fromregion(&buffer, &token.value.as_region);
  51                 RETTOK(dns_name_fromtext(&name, &buffer, origin,
  52                                          options, target));
  53                 ok = ISC_TRUE;
  54                 if ((options & DNS_RDATA_CHECKNAMES) != 0)
  55                         switch (i) {
  56                         case 0:
  57                                 ok = dns_name_ishostname(&name, ISC_FALSE);
  58                                 break;
  59                         case 1:
  60                                 ok = dns_name_ismailbox(&name);
  61                                 break;
  62
  63                         }
  64                 if (!ok && (options & DNS_RDATA_CHECKNAMESFAIL) != 0)
  65                         RETTOK(DNS_R_BADNAME);
  66                 if (!ok && callbacks != NULL)
  67                         warn_badname(&name, lexer, callbacks);
  68         }
  69
  70         RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_number,
  71                                       ISC_FALSE));
  72         RETERR(uint32_tobuffer(token.value.as_ulong, target));
  73
  74         for (i = 0; i < 4; i++) {
  75                 RETERR(isc_lex_getmastertoken(lexer, &token,
  76                                               isc_tokentype_string,
  77                                               ISC_FALSE));
  78                 RETTOK(dns_counter_fromtext(&token.value.as_textregion, &n));
  79                 RETERR(uint32_tobuffer(n, target));
  80         }
  81
  82         return (ISC_R_SUCCESS);
  83 }
  84
  85 static const char *soa_fieldnames[5] = {
  86         "serial", "refresh", "retry", "expire", "minimum"
  87 };
  88
  89 static inline isc_result_t
  90 totext_soa(ARGS_TOTEXT) {
  91         isc_region_t dregion;
  92         dns_name_t mname;
  93         dns_name_t rname;
  94         dns_name_t prefix;
  95         isc_boolean_t sub;
  96         int i;
  97         isc_boolean_t multiline;
  98         isc_boolean_t comment;
  99
 100         REQUIRE(rdata->type == 6);
 101         REQUIRE(rdata->length != 0);
 102
 103         multiline = ISC_TF((tctx->flags & DNS_STYLEFLAG_MULTILINE) != 0);
 104         comment = ISC_TF((tctx->flags & DNS_STYLEFLAG_COMMENT) != 0);
 105
 106         dns_name_init(&mname, NULL);
 107         dns_name_init(&rname, NULL);
 108         dns_name_init(&prefix, NULL);
 109
 110         dns_rdata_toregion(rdata, &dregion);
 111
 112         dns_name_fromregion(&mname, &dregion);
 113         isc_region_consume(&dregion, name_length(&mname));
 114
 115         dns_name_fromregion(&rname, &dregion);
 116         isc_region_consume(&dregion, name_length(&rname));
 117
 118         sub = name_prefix(&mname, tctx->origin, &prefix);
 119         RETERR(dns_name_totext(&prefix, sub, target));
 120
 121         RETERR(str_totext(" ", target));
 122
 123         sub = name_prefix(&rname, tctx->origin, &prefix);
 124         RETERR(dns_name_totext(&prefix, sub, target));
 125
 126         if (multiline)
 127                 RETERR(str_totext(" (" , target));
 128         RETERR(str_totext(tctx->linebreak, target));
 129
 130         for (i = 0; i < 5; i++) {
 131                 char buf[sizeof("2147483647")];
 132                 unsigned long num;
 133                 unsigned int numlen;
 134                 num = uint32_fromregion(&dregion);
 135                 isc_region_consume(&dregion, 4);
 136                 numlen = sprintf(buf, "%lu", num);
 137                 INSIST(numlen > 0 && numlen < sizeof("2147483647"));
 138                 RETERR(str_totext(buf, target));
 139                 if (multiline && comment) {
 140                         RETERR(str_totext("           ; " + numlen, target));
 141                         RETERR(str_totext(soa_fieldnames[i], target));
 142                         /* Print times in week/day/hour/minute/second form */
 143                         if (i >= 1) {
 144                                 RETERR(str_totext(" (", target));
 145                                 RETERR(dns_ttl_totext(num, ISC_TRUE, target));
 146                                 RETERR(str_totext(")", target));
 147                         }
 148                         RETERR(str_totext(tctx->linebreak, target));
 149                 } else if (i < 4) {
 150                         RETERR(str_totext(tctx->linebreak, target));
 151                 }
 152         }
 153
 154         if (multiline)
 155                 RETERR(str_totext(")", target));
 156
 157         return (ISC_R_SUCCESS);
 158 }
 159
 160 static inline isc_result_t
 161 fromwire_soa(ARGS_FROMWIRE) {
 162         dns_name_t mname;
 163         dns_name_t rname;
 164         isc_region_t sregion;
 165         isc_region_t tregion;
 166
 167         REQUIRE(type == 6);
 168
 169         UNUSED(type);
 170         UNUSED(rdclass);
 171
 172         dns_decompress_setmethods(dctx, DNS_COMPRESS_GLOBAL14);
 173
 174         dns_name_init(&mname, NULL);
 175         dns_name_init(&rname, NULL);
 176
 177         RETERR(dns_name_fromwire(&mname, source, dctx, options, target));
 178         RETERR(dns_name_fromwire(&rname, source, dctx, options, target));
 179
 180         isc_buffer_activeregion(source, &sregion);
 181         isc_buffer_availableregion(target, &tregion);
 182
 183         if (sregion.length < 20)
 184                 return (ISC_R_UNEXPECTEDEND);
 185         if (tregion.length < 20)
 186                 return (ISC_R_NOSPACE);
 187
 188         memcpy(tregion.base, sregion.base, 20);
 189         isc_buffer_forward(source, 20);
 190         isc_buffer_add(target, 20);
 191
 192         return (ISC_R_SUCCESS);
 193 }
 194
 195 static inline isc_result_t
 196 towire_soa(ARGS_TOWIRE) {
 197         isc_region_t sregion;
 198         isc_region_t tregion;
 199         dns_name_t mname;
 200         dns_name_t rname;
 201         dns_offsets_t moffsets;
 202         dns_offsets_t roffsets;
 203
 204         REQUIRE(rdata->type == 6);
 205         REQUIRE(rdata->length != 0);
 206
 207         dns_compress_setmethods(cctx, DNS_COMPRESS_GLOBAL14);
 208
 209         dns_name_init(&mname, moffsets);
 210         dns_name_init(&rname, roffsets);
 211
 212         dns_rdata_toregion(rdata, &sregion);
 213
 214         dns_name_fromregion(&mname, &sregion);
 215         isc_region_consume(&sregion, name_length(&mname));
 216         RETERR(dns_name_towire(&mname, cctx, target));
 217
 218         dns_name_fromregion(&rname, &sregion);
 219         isc_region_consume(&sregion, name_length(&rname));
 220         RETERR(dns_name_towire(&rname, cctx, target));
 221
 222         isc_buffer_availableregion(target, &tregion);
 223         if (tregion.length < 20)
 224                 return (ISC_R_NOSPACE);
 225
 226         memcpy(tregion.base, sregion.base, 20);
 227         isc_buffer_add(target, 20);
 228         return (ISC_R_SUCCESS);
 229 }
 230
 231 static inline int
 232 compare_soa(ARGS_COMPARE) {
 233         isc_region_t region1;
 234         isc_region_t region2;
 235         dns_name_t name1;
 236         dns_name_t name2;
 237         int order;
 238
 239         REQUIRE(rdata1->type == rdata2->type);
 240         REQUIRE(rdata1->rdclass == rdata2->rdclass);
 241         REQUIRE(rdata1->type == 6);
 242         REQUIRE(rdata1->length != 0);
 243         REQUIRE(rdata2->length != 0);
 244
 245         dns_name_init(&name1, NULL);
 246         dns_name_init(&name2, NULL);
 247
 248         dns_rdata_toregion(rdata1, &region1);
 249         dns_rdata_toregion(rdata2, &region2);
 250
 251         dns_name_fromregion(&name1, &region1);
 252         dns_name_fromregion(&name2, &region2);
 253
 254         order = dns_name_rdatacompare(&name1, &name2);
 255         if (order != 0)
 256                 return (order);
 257
 258         isc_region_consume(&region1, name_length(&name1));
 259         isc_region_consume(&region2, name_length(&name2));
 260
 261         dns_name_init(&name1, NULL);
 262         dns_name_init(&name2, NULL);
 263
 264         dns_name_fromregion(&name1, &region1);
 265         dns_name_fromregion(&name2, &region2);
 266
 267         order = dns_name_rdatacompare(&name1, &name2);
 268         if (order != 0)
 269                 return (order);
 270
 271         isc_region_consume(&region1, name_length(&name1));
 272         isc_region_consume(&region2, name_length(&name2));
 273
 274         return (isc_region_compare(&region1, &region2));
 275 }
 276
 277 static inline isc_result_t
 278 fromstruct_soa(ARGS_FROMSTRUCT) {
 279         dns_rdata_soa_t *soa = source;
 280         isc_region_t region;
 281
 282         REQUIRE(type == 6);
 283         REQUIRE(source != NULL);
 284         REQUIRE(soa->common.rdtype == type);
 285         REQUIRE(soa->common.rdclass == rdclass);
 286
 287         UNUSED(type);
 288         UNUSED(rdclass);
 289
 290         dns_name_toregion(&soa->origin, &region);
 291         RETERR(isc_buffer_copyregion(target, &region));
 292         dns_name_toregion(&soa->contact, &region);
 293         RETERR(isc_buffer_copyregion(target, &region));
 294         RETERR(uint32_tobuffer(soa->serial, target));
 295         RETERR(uint32_tobuffer(soa->refresh, target));
 296         RETERR(uint32_tobuffer(soa->retry, target));
 297         RETERR(uint32_tobuffer(soa->expire, target));
 298         return (uint32_tobuffer(soa->minimum, target));
 299 }
 300
 301 static inline isc_result_t
 302 tostruct_soa(ARGS_TOSTRUCT) {
 303         isc_region_t region;
 304         dns_rdata_soa_t *soa = target;
 305         dns_name_t name;
 306         isc_result_t result;
 307
 308         REQUIRE(rdata->type == 6);
 309         REQUIRE(target != NULL);
 310         REQUIRE(rdata->length != 0);
 311
 312         soa->common.rdclass = rdata->rdclass;
 313         soa->common.rdtype = rdata->type;
 314         ISC_LINK_INIT(&soa->common, link);
 315
 316
 317         dns_rdata_toregion(rdata, &region);
 318
 319         dns_name_init(&name, NULL);
 320         dns_name_fromregion(&name, &region);
 321         isc_region_consume(&region, name_length(&name));
 322         dns_name_init(&soa->origin, NULL);
 323         RETERR(name_duporclone(&name, mctx, &soa->origin));
 324
 325         dns_name_fromregion(&name, &region);
 326         isc_region_consume(&region, name_length(&name));
 327         dns_name_init(&soa->contact, NULL);
 328         result = name_duporclone(&name, mctx, &soa->contact);
 329         if (result != ISC_R_SUCCESS)
 330                 goto cleanup;
 331
 332         soa->serial = uint32_fromregion(&region);
 333         isc_region_consume(&region, 4);
 334
 335         soa->refresh = uint32_fromregion(&region);
 336         isc_region_consume(&region, 4);
 337
 338         soa->retry = uint32_fromregion(&region);
 339         isc_region_consume(&region, 4);
 340
 341         soa->expire = uint32_fromregion(&region);
 342         isc_region_consume(&region, 4);
 343
 344         soa->minimum = uint32_fromregion(&region);
 345
 346         soa->mctx = mctx;
 347         return (ISC_R_SUCCESS);
 348
 349  cleanup:
 350         if (mctx != NULL)
 351                 dns_name_free(&soa->origin, mctx);
 352         return (ISC_R_NOMEMORY);
 353 }
 354
 355 static inline void
 356 freestruct_soa(ARGS_FREESTRUCT) {
 357         dns_rdata_soa_t *soa = source;
 358
 359         REQUIRE(source != NULL);
 360         REQUIRE(soa->common.rdtype == 6);
 361
 362         if (soa->mctx == NULL)
 363                 return;
 364
 365         dns_name_free(&soa->origin, soa->mctx);
 366         dns_name_free(&soa->contact, soa->mctx);
 367         soa->mctx = NULL;
 368 }
 369
 370 static inline isc_result_t
 371 additionaldata_soa(ARGS_ADDLDATA) {
 372         UNUSED(rdata);
 373         UNUSED(add);
 374         UNUSED(arg);
 375
 376         REQUIRE(rdata->type == 6);
 377
 378         return (ISC_R_SUCCESS);
 379 }
 380
 381 static inline isc_result_t
 382 digest_soa(ARGS_DIGEST) {
 383         isc_region_t r;
 384         dns_name_t name;
 385
 386         REQUIRE(rdata->type == 6);
 387
 388         dns_rdata_toregion(rdata, &r);
 389
 390         dns_name_init(&name, NULL);
 391         dns_name_fromregion(&name, &r);
 392         RETERR(dns_name_digest(&name, digest, arg));
 393         isc_region_consume(&r, name_length(&name));
 394
 395         dns_name_init(&name, NULL);
 396         dns_name_fromregion(&name, &r);
 397         RETERR(dns_name_digest(&name, digest, arg));
 398         isc_region_consume(&r, name_length(&name));
 399
 400         return ((digest)(arg, &r));
 401 }
 402
 403 static inline isc_boolean_t
 404 checkowner_soa(ARGS_CHECKOWNER) {
 405
 406         REQUIRE(type == 6);
 407
 408         UNUSED(name);
 409         UNUSED(type);
 410         UNUSED(rdclass);
 411         UNUSED(wildcard);
 412
 413         return (ISC_TRUE);
 414 }
 415
 416 static inline isc_boolean_t
 417 checknames_soa(ARGS_CHECKNAMES) {
 418         isc_region_t region;
 419         dns_name_t name;
 420
 421         REQUIRE(rdata->type == 6);
 422
 423         UNUSED(owner);
 424
 425         dns_rdata_toregion(rdata, &region);
 426         dns_name_init(&name, NULL);
 427         dns_name_fromregion(&name, &region);
 428         if (!dns_name_ishostname(&name, ISC_FALSE)) {
 429                 if (bad != NULL)
 430                         dns_name_clone(&name, bad);
 431                 return (ISC_FALSE);
 432         }
 433         isc_region_consume(&region, name_length(&name));
 434         dns_name_fromregion(&name, &region);
 435         if (!dns_name_ismailbox(&name)) {
 436                 if (bad != NULL)
 437                         dns_name_clone(&name, bad);
 438                 return (ISC_FALSE);
 439         }
 440         return (ISC_TRUE);
 441 }
 442
 443 #endif  /* RDATA_GENERIC_SOA_6_C */