external/bsd/bind/dist/lib/dns/rdata/generic/ptr_12.c

   1 /*      $NetBSD: ptr_12.c,v 1.4 2014/12/10 04:37:59 christos Exp $      */
   2
   3 /*
   4  * Copyright (C) 2004, 2007, 2009  Internet Systems Consortium, Inc. ("ISC")
   5  * Copyright (C) 1998-2001  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: ptr_12.c,v 1.45 2009/12/04 22:06:37 tbox Exp  */
  21
  22 /* Reviewed: Thu Mar 16 14:05:12 PST 2000 by explorer */
  23
  24 #ifndef RDATA_GENERIC_PTR_12_C
  25 #define RDATA_GENERIC_PTR_12_C
  26
  27 #define RRTYPE_PTR_ATTRIBUTES (0)
  28
  29 static inline isc_result_t
  30 fromtext_ptr(ARGS_FROMTEXT) {
  31         isc_token_t token;
  32         dns_name_t name;
  33         isc_buffer_t buffer;
  34
  35         REQUIRE(type == 12);
  36
  37         UNUSED(type);
  38         UNUSED(rdclass);
  39         UNUSED(callbacks);
  40
  41         RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_string,
  42                                       ISC_FALSE));
  43
  44         dns_name_init(&name, NULL);
  45         buffer_fromregion(&buffer, &token.value.as_region);
  46         origin = (origin != NULL) ? origin : dns_rootname;
  47         RETTOK(dns_name_fromtext(&name, &buffer, origin, options, target));
  48         if (rdclass == dns_rdataclass_in &&
  49             (options & DNS_RDATA_CHECKNAMES) != 0 &&
  50             (options & DNS_RDATA_CHECKREVERSE) != 0) {
  51                 isc_boolean_t ok;
  52                 ok = dns_name_ishostname(&name, ISC_FALSE);
  53                 if (!ok && (options & DNS_RDATA_CHECKNAMESFAIL) != 0)
  54                         RETTOK(DNS_R_BADNAME);
  55                 if (!ok && callbacks != NULL)
  56                         warn_badname(&name, lexer, callbacks);
  57         }
  58         return (ISC_R_SUCCESS);
  59 }
  60
  61 static inline isc_result_t
  62 totext_ptr(ARGS_TOTEXT) {
  63         isc_region_t region;
  64         dns_name_t name;
  65         dns_name_t prefix;
  66         isc_boolean_t sub;
  67
  68         REQUIRE(rdata->type == 12);
  69         REQUIRE(rdata->length != 0);
  70
  71         dns_name_init(&name, NULL);
  72         dns_name_init(&prefix, NULL);
  73
  74         dns_rdata_toregion(rdata, &region);
  75         dns_name_fromregion(&name, &region);
  76
  77         sub = name_prefix(&name, tctx->origin, &prefix);
  78
  79         return (dns_name_totext(&prefix, sub, target));
  80 }
  81
  82 static inline isc_result_t
  83 fromwire_ptr(ARGS_FROMWIRE) {
  84         dns_name_t name;
  85
  86         REQUIRE(type == 12);
  87
  88         UNUSED(type);
  89         UNUSED(rdclass);
  90
  91         dns_decompress_setmethods(dctx, DNS_COMPRESS_GLOBAL14);
  92
  93         dns_name_init(&name, NULL);
  94         return (dns_name_fromwire(&name, source, dctx, options, target));
  95 }
  96
  97 static inline isc_result_t
  98 towire_ptr(ARGS_TOWIRE) {
  99         dns_name_t name;
 100         dns_offsets_t offsets;
 101         isc_region_t region;
 102
 103         REQUIRE(rdata->type == 12);
 104         REQUIRE(rdata->length != 0);
 105
 106         dns_compress_setmethods(cctx, DNS_COMPRESS_GLOBAL14);
 107
 108         dns_name_init(&name, offsets);
 109         dns_rdata_toregion(rdata, &region);
 110         dns_name_fromregion(&name, &region);
 111
 112         return (dns_name_towire(&name, cctx, target));
 113 }
 114
 115 static inline int
 116 compare_ptr(ARGS_COMPARE) {
 117         dns_name_t name1;
 118         dns_name_t name2;
 119         isc_region_t region1;
 120         isc_region_t region2;
 121
 122         REQUIRE(rdata1->type == rdata2->type);
 123         REQUIRE(rdata1->rdclass == rdata2->rdclass);
 124         REQUIRE(rdata1->type == 12);
 125         REQUIRE(rdata1->length != 0);
 126         REQUIRE(rdata2->length != 0);
 127
 128         dns_name_init(&name1, NULL);
 129         dns_name_init(&name2, NULL);
 130
 131         dns_rdata_toregion(rdata1, &region1);
 132         dns_rdata_toregion(rdata2, &region2);
 133
 134         dns_name_fromregion(&name1, &region1);
 135         dns_name_fromregion(&name2, &region2);
 136
 137         return (dns_name_rdatacompare(&name1, &name2));
 138 }
 139
 140 static inline isc_result_t
 141 fromstruct_ptr(ARGS_FROMSTRUCT) {
 142         dns_rdata_ptr_t *ptr = source;
 143         isc_region_t region;
 144
 145         REQUIRE(type == 12);
 146         REQUIRE(source != NULL);
 147         REQUIRE(ptr->common.rdtype == type);
 148         REQUIRE(ptr->common.rdclass == rdclass);
 149
 150         UNUSED(type);
 151         UNUSED(rdclass);
 152
 153         dns_name_toregion(&ptr->ptr, &region);
 154         return (isc_buffer_copyregion(target, &region));
 155 }
 156
 157 static inline isc_result_t
 158 tostruct_ptr(ARGS_TOSTRUCT) {
 159         isc_region_t region;
 160         dns_rdata_ptr_t *ptr = target;
 161         dns_name_t name;
 162
 163         REQUIRE(rdata->type == 12);
 164         REQUIRE(target != NULL);
 165         REQUIRE(rdata->length != 0);
 166
 167         ptr->common.rdclass = rdata->rdclass;
 168         ptr->common.rdtype = rdata->type;
 169         ISC_LINK_INIT(&ptr->common, link);
 170
 171         dns_name_init(&name, NULL);
 172         dns_rdata_toregion(rdata, &region);
 173         dns_name_fromregion(&name, &region);
 174         dns_name_init(&ptr->ptr, NULL);
 175         RETERR(name_duporclone(&name, mctx, &ptr->ptr));
 176         ptr->mctx = mctx;
 177         return (ISC_R_SUCCESS);
 178 }
 179
 180 static inline void
 181 freestruct_ptr(ARGS_FREESTRUCT) {
 182         dns_rdata_ptr_t *ptr = source;
 183
 184         REQUIRE(source != NULL);
 185         REQUIRE(ptr->common.rdtype == 12);
 186
 187         if (ptr->mctx == NULL)
 188                 return;
 189
 190         dns_name_free(&ptr->ptr, ptr->mctx);
 191         ptr->mctx = NULL;
 192 }
 193
 194 static inline isc_result_t
 195 additionaldata_ptr(ARGS_ADDLDATA) {
 196         REQUIRE(rdata->type == 12);
 197
 198         UNUSED(rdata);
 199         UNUSED(add);
 200         UNUSED(arg);
 201
 202         return (ISC_R_SUCCESS);
 203 }
 204
 205 static inline isc_result_t
 206 digest_ptr(ARGS_DIGEST) {
 207         isc_region_t r;
 208         dns_name_t name;
 209
 210         REQUIRE(rdata->type == 12);
 211
 212         dns_rdata_toregion(rdata, &r);
 213         dns_name_init(&name, NULL);
 214         dns_name_fromregion(&name, &r);
 215
 216         return (dns_name_digest(&name, digest, arg));
 217 }
 218
 219 static inline isc_boolean_t
 220 checkowner_ptr(ARGS_CHECKOWNER) {
 221
 222         REQUIRE(type == 12);
 223
 224         UNUSED(name);
 225         UNUSED(type);
 226         UNUSED(rdclass);
 227         UNUSED(wildcard);
 228
 229         return (ISC_TRUE);
 230 }
 231
 232 static unsigned char ip6_arpa_data[]  = "\003IP6\004ARPA";
 233 static unsigned char ip6_arpa_offsets[] = { 0, 4, 9 };
 234 static const dns_name_t ip6_arpa =
 235 {
 236         DNS_NAME_MAGIC,
 237         ip6_arpa_data, 10, 3,
 238         DNS_NAMEATTR_READONLY | DNS_NAMEATTR_ABSOLUTE,
 239         ip6_arpa_offsets, NULL,
 240         {(void *)-1, (void *)-1},
 241         {NULL, NULL}
 242 };
 243
 244 static unsigned char ip6_int_data[]  = "\003IP6\003INT";
 245 static unsigned char ip6_int_offsets[] = { 0, 4, 8 };
 246 static const dns_name_t ip6_int =
 247 {
 248         DNS_NAME_MAGIC,
 249         ip6_int_data, 9, 3,
 250         DNS_NAMEATTR_READONLY | DNS_NAMEATTR_ABSOLUTE,
 251         ip6_int_offsets, NULL,
 252         {(void *)-1, (void *)-1},
 253         {NULL, NULL}
 254 };
 255
 256 static unsigned char in_addr_arpa_data[]  = "\007IN-ADDR\004ARPA";
 257 static unsigned char in_addr_arpa_offsets[] = { 0, 8, 13 };
 258 static const dns_name_t in_addr_arpa =
 259 {
 260         DNS_NAME_MAGIC,
 261         in_addr_arpa_data, 14, 3,
 262         DNS_NAMEATTR_READONLY | DNS_NAMEATTR_ABSOLUTE,
 263         in_addr_arpa_offsets, NULL,
 264         {(void *)-1, (void *)-1},
 265         {NULL, NULL}
 266 };
 267
 268 static inline isc_boolean_t
 269 checknames_ptr(ARGS_CHECKNAMES) {
 270         isc_region_t region;
 271         dns_name_t name;
 272
 273         REQUIRE(rdata->type == 12);
 274
 275         if (rdata->rdclass != dns_rdataclass_in)
 276             return (ISC_TRUE);
 277
 278         if (dns_name_issubdomain(owner, &in_addr_arpa) ||
 279             dns_name_issubdomain(owner, &ip6_arpa) ||
 280             dns_name_issubdomain(owner, &ip6_int)) {
 281                 dns_rdata_toregion(rdata, &region);
 282                 dns_name_init(&name, NULL);
 283                 dns_name_fromregion(&name, &region);
 284                 if (!dns_name_ishostname(&name, ISC_FALSE)) {
 285                         if (bad != NULL)
 286                                 dns_name_clone(&name, bad);
 287                         return (ISC_FALSE);
 288                 }
 289         }
 290         return (ISC_TRUE);
 291 }
 292
 293 static inline int
 294 casecompare_ptr(ARGS_COMPARE) {
 295         return (compare_ptr(rdata1, rdata2));
 296 }
 297 #endif  /* RDATA_GENERIC_PTR_12_C */