contrib/bind-9.5.2/lib/dns/rdata/generic/ptr_12.c

   1 /*
   2  * Copyright (C) 2004, 2007  Internet Systems Consortium, Inc. ("ISC")
   3  * Copyright (C) 1998-2001  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: ptr_12.c,v 1.43 2007/06/19 23:47:17 tbox Exp $ */
  19
  20 /* Reviewed: Thu Mar 16 14:05:12 PST 2000 by explorer */
  21
  22 #ifndef RDATA_GENERIC_PTR_12_C
  23 #define RDATA_GENERIC_PTR_12_C
  24
  25 #define RRTYPE_PTR_ATTRIBUTES (0)
  26
  27 static inline isc_result_t
  28 fromtext_ptr(ARGS_FROMTEXT) {
  29         isc_token_t token;
  30         dns_name_t name;
  31         isc_buffer_t buffer;
  32
  33         REQUIRE(type == 12);
  34
  35         UNUSED(type);
  36         UNUSED(rdclass);
  37         UNUSED(callbacks);
  38
  39         RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_string,
  40                                       ISC_FALSE));
  41
  42         dns_name_init(&name, NULL);
  43         buffer_fromregion(&buffer, &token.value.as_region);
  44         origin = (origin != NULL) ? origin : dns_rootname;
  45         RETTOK(dns_name_fromtext(&name, &buffer, origin, options, target));
  46         if (rdclass == dns_rdataclass_in &&
  47             (options & DNS_RDATA_CHECKNAMES) != 0 &&
  48             (options & DNS_RDATA_CHECKREVERSE) != 0) {
  49                 isc_boolean_t ok;
  50                 ok = dns_name_ishostname(&name, ISC_FALSE);
  51                 if (!ok && (options & DNS_RDATA_CHECKNAMESFAIL) != 0)
  52                         RETTOK(DNS_R_BADNAME);
  53                 if (!ok && callbacks != NULL)
  54                         warn_badname(&name, lexer, callbacks);
  55         }
  56         return (ISC_R_SUCCESS);
  57 }
  58
  59 static inline isc_result_t
  60 totext_ptr(ARGS_TOTEXT) {
  61         isc_region_t region;
  62         dns_name_t name;
  63         dns_name_t prefix;
  64         isc_boolean_t sub;
  65
  66         REQUIRE(rdata->type == 12);
  67         REQUIRE(rdata->length != 0);
  68
  69         dns_name_init(&name, NULL);
  70         dns_name_init(&prefix, NULL);
  71
  72         dns_rdata_toregion(rdata, &region);
  73         dns_name_fromregion(&name, &region);
  74
  75         sub = name_prefix(&name, tctx->origin, &prefix);
  76
  77         return (dns_name_totext(&prefix, sub, target));
  78 }
  79
  80 static inline isc_result_t
  81 fromwire_ptr(ARGS_FROMWIRE) {
  82         dns_name_t name;
  83
  84         REQUIRE(type == 12);
  85
  86         UNUSED(type);
  87         UNUSED(rdclass);
  88
  89         dns_decompress_setmethods(dctx, DNS_COMPRESS_GLOBAL14);
  90
  91         dns_name_init(&name, NULL);
  92         return (dns_name_fromwire(&name, source, dctx, options, target));
  93 }
  94
  95 static inline isc_result_t
  96 towire_ptr(ARGS_TOWIRE) {
  97         dns_name_t name;
  98         dns_offsets_t offsets;
  99         isc_region_t region;
 100
 101         REQUIRE(rdata->type == 12);
 102         REQUIRE(rdata->length != 0);
 103
 104         dns_compress_setmethods(cctx, DNS_COMPRESS_GLOBAL14);
 105
 106         dns_name_init(&name, offsets);
 107         dns_rdata_toregion(rdata, &region);
 108         dns_name_fromregion(&name, &region);
 109
 110         return (dns_name_towire(&name, cctx, target));
 111 }
 112
 113 static inline int
 114 compare_ptr(ARGS_COMPARE) {
 115         dns_name_t name1;
 116         dns_name_t name2;
 117         isc_region_t region1;
 118         isc_region_t region2;
 119
 120         REQUIRE(rdata1->type == rdata2->type);
 121         REQUIRE(rdata1->rdclass == rdata2->rdclass);
 122         REQUIRE(rdata1->type == 12);
 123         REQUIRE(rdata1->length != 0);
 124         REQUIRE(rdata2->length != 0);
 125
 126         dns_name_init(&name1, NULL);
 127         dns_name_init(&name2, NULL);
 128
 129         dns_rdata_toregion(rdata1, &region1);
 130         dns_rdata_toregion(rdata2, &region2);
 131
 132         dns_name_fromregion(&name1, &region1);
 133         dns_name_fromregion(&name2, &region2);
 134
 135         return (dns_name_rdatacompare(&name1, &name2));
 136 }
 137
 138 static inline isc_result_t
 139 fromstruct_ptr(ARGS_FROMSTRUCT) {
 140         dns_rdata_ptr_t *ptr = source;
 141         isc_region_t region;
 142
 143         REQUIRE(type == 12);
 144         REQUIRE(source != NULL);
 145         REQUIRE(ptr->common.rdtype == type);
 146         REQUIRE(ptr->common.rdclass == rdclass);
 147
 148         UNUSED(type);
 149         UNUSED(rdclass);
 150
 151         dns_name_toregion(&ptr->ptr, &region);
 152         return (isc_buffer_copyregion(target, &region));
 153 }
 154
 155 static inline isc_result_t
 156 tostruct_ptr(ARGS_TOSTRUCT) {
 157         isc_region_t region;
 158         dns_rdata_ptr_t *ptr = target;
 159         dns_name_t name;
 160
 161         REQUIRE(rdata->type == 12);
 162         REQUIRE(target != NULL);
 163         REQUIRE(rdata->length != 0);
 164
 165         ptr->common.rdclass = rdata->rdclass;
 166         ptr->common.rdtype = rdata->type;
 167         ISC_LINK_INIT(&ptr->common, link);
 168
 169         dns_name_init(&name, NULL);
 170         dns_rdata_toregion(rdata, &region);
 171         dns_name_fromregion(&name, &region);
 172         dns_name_init(&ptr->ptr, NULL);
 173         RETERR(name_duporclone(&name, mctx, &ptr->ptr));
 174         ptr->mctx = mctx;
 175         return (ISC_R_SUCCESS);
 176 }
 177
 178 static inline void
 179 freestruct_ptr(ARGS_FREESTRUCT) {
 180         dns_rdata_ptr_t *ptr = source;
 181
 182         REQUIRE(source != NULL);
 183         REQUIRE(ptr->common.rdtype == 12);
 184
 185         if (ptr->mctx == NULL)
 186                 return;
 187
 188         dns_name_free(&ptr->ptr, ptr->mctx);
 189         ptr->mctx = NULL;
 190 }
 191
 192 static inline isc_result_t
 193 additionaldata_ptr(ARGS_ADDLDATA) {
 194         REQUIRE(rdata->type == 12);
 195
 196         UNUSED(rdata);
 197         UNUSED(add);
 198         UNUSED(arg);
 199
 200         return (ISC_R_SUCCESS);
 201 }
 202
 203 static inline isc_result_t
 204 digest_ptr(ARGS_DIGEST) {
 205         isc_region_t r;
 206         dns_name_t name;
 207
 208         REQUIRE(rdata->type == 12);
 209
 210         dns_rdata_toregion(rdata, &r);
 211         dns_name_init(&name, NULL);
 212         dns_name_fromregion(&name, &r);
 213
 214         return (dns_name_digest(&name, digest, arg));
 215 }
 216
 217 static inline isc_boolean_t
 218 checkowner_ptr(ARGS_CHECKOWNER) {
 219
 220         REQUIRE(type == 12);
 221
 222         UNUSED(name);
 223         UNUSED(type);
 224         UNUSED(rdclass);
 225         UNUSED(wildcard);
 226
 227         return (ISC_TRUE);
 228 }
 229
 230 static unsigned char ip6_arpa_data[]  = "\003IP6\004ARPA";
 231 static unsigned char ip6_arpa_offsets[] = { 0, 4, 9 };
 232 static const dns_name_t ip6_arpa =
 233 {
 234         DNS_NAME_MAGIC,
 235         ip6_arpa_data, 10, 3,
 236         DNS_NAMEATTR_READONLY | DNS_NAMEATTR_ABSOLUTE,
 237         ip6_arpa_offsets, NULL,
 238         {(void *)-1, (void *)-1},
 239         {NULL, NULL}
 240 };
 241
 242 static unsigned char ip6_int_data[]  = "\003IP6\003INT";
 243 static unsigned char ip6_int_offsets[] = { 0, 4, 8 };
 244 static const dns_name_t ip6_int =
 245 {
 246         DNS_NAME_MAGIC,
 247         ip6_int_data, 9, 3,
 248         DNS_NAMEATTR_READONLY | DNS_NAMEATTR_ABSOLUTE,
 249         ip6_int_offsets, NULL,
 250         {(void *)-1, (void *)-1},
 251         {NULL, NULL}
 252 };
 253
 254 static unsigned char in_addr_arpa_data[]  = "\007IN-ADDR\004ARPA";
 255 static unsigned char in_addr_arpa_offsets[] = { 0, 8, 13 };
 256 static const dns_name_t in_addr_arpa =
 257 {
 258         DNS_NAME_MAGIC,
 259         in_addr_arpa_data, 14, 3,
 260         DNS_NAMEATTR_READONLY | DNS_NAMEATTR_ABSOLUTE,
 261         in_addr_arpa_offsets, NULL,
 262         {(void *)-1, (void *)-1},
 263         {NULL, NULL}
 264 };
 265
 266 static inline isc_boolean_t
 267 checknames_ptr(ARGS_CHECKNAMES) {
 268         isc_region_t region;
 269         dns_name_t name;
 270
 271         REQUIRE(rdata->type == 12);
 272
 273         if (rdata->rdclass != dns_rdataclass_in)
 274             return (ISC_TRUE);
 275
 276         if (dns_name_issubdomain(owner, &in_addr_arpa) ||
 277             dns_name_issubdomain(owner, &ip6_arpa) ||
 278             dns_name_issubdomain(owner, &ip6_int)) {
 279                 dns_rdata_toregion(rdata, &region);
 280                 dns_name_init(&name, NULL);
 281                 dns_name_fromregion(&name, &region);
 282                 if (!dns_name_ishostname(&name, ISC_FALSE)) {
 283                         if (bad != NULL)
 284                                 dns_name_clone(&name, bad);
 285                         return (ISC_FALSE);
 286                 }
 287         }
 288         return (ISC_TRUE);
 289 }
 290
 291 #endif  /* RDATA_GENERIC_PTR_12_C */