external/bsd/bind/dist/lib/dns/rdata/generic/cname_5.c

   1 /*      $NetBSD: cname_5.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: cname_5.c,v 1.49 2009/12/04 22:06:37 tbox Exp  */
  21
  22 /* reviewed: Wed Mar 15 16:48:45 PST 2000 by brister */
  23
  24 #ifndef RDATA_GENERIC_CNAME_5_C
  25 #define RDATA_GENERIC_CNAME_5_C
  26
  27 #define RRTYPE_CNAME_ATTRIBUTES \
  28         (DNS_RDATATYPEATTR_EXCLUSIVE | DNS_RDATATYPEATTR_SINGLETON)
  29
  30 static inline isc_result_t
  31 fromtext_cname(ARGS_FROMTEXT) {
  32         isc_token_t token;
  33         dns_name_t name;
  34         isc_buffer_t buffer;
  35
  36         REQUIRE(type == 5);
  37
  38         UNUSED(type);
  39         UNUSED(rdclass);
  40         UNUSED(callbacks);
  41
  42         RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_string,
  43                                       ISC_FALSE));
  44
  45         dns_name_init(&name, NULL);
  46         buffer_fromregion(&buffer, &token.value.as_region);
  47         origin = (origin != NULL) ? origin : dns_rootname;
  48         RETTOK(dns_name_fromtext(&name, &buffer, origin, options, target));
  49         return (ISC_R_SUCCESS);
  50 }
  51
  52 static inline isc_result_t
  53 totext_cname(ARGS_TOTEXT) {
  54         isc_region_t region;
  55         dns_name_t name;
  56         dns_name_t prefix;
  57         isc_boolean_t sub;
  58
  59         REQUIRE(rdata->type == 5);
  60         REQUIRE(rdata->length != 0);
  61
  62         dns_name_init(&name, NULL);
  63         dns_name_init(&prefix, NULL);
  64
  65         dns_rdata_toregion(rdata, &region);
  66         dns_name_fromregion(&name, &region);
  67
  68         sub = name_prefix(&name, tctx->origin, &prefix);
  69
  70         return (dns_name_totext(&prefix, sub, target));
  71 }
  72
  73 static inline isc_result_t
  74 fromwire_cname(ARGS_FROMWIRE) {
  75         dns_name_t name;
  76
  77         REQUIRE(type == 5);
  78
  79         UNUSED(type);
  80         UNUSED(rdclass);
  81
  82         dns_decompress_setmethods(dctx, DNS_COMPRESS_GLOBAL14);
  83
  84         dns_name_init(&name, NULL);
  85         return (dns_name_fromwire(&name, source, dctx, options, target));
  86 }
  87
  88 static inline isc_result_t
  89 towire_cname(ARGS_TOWIRE) {
  90         dns_name_t name;
  91         dns_offsets_t offsets;
  92         isc_region_t region;
  93
  94         REQUIRE(rdata->type == 5);
  95         REQUIRE(rdata->length != 0);
  96
  97         dns_compress_setmethods(cctx, DNS_COMPRESS_GLOBAL14);
  98
  99         dns_name_init(&name, offsets);
 100         dns_rdata_toregion(rdata, &region);
 101         dns_name_fromregion(&name, &region);
 102
 103         return (dns_name_towire(&name, cctx, target));
 104 }
 105
 106 static inline int
 107 compare_cname(ARGS_COMPARE) {
 108         dns_name_t name1;
 109         dns_name_t name2;
 110         isc_region_t region1;
 111         isc_region_t region2;
 112
 113         REQUIRE(rdata1->type == rdata2->type);
 114         REQUIRE(rdata1->rdclass == rdata2->rdclass);
 115         REQUIRE(rdata1->type == 5);
 116         REQUIRE(rdata1->length != 0);
 117         REQUIRE(rdata2->length != 0);
 118
 119         dns_name_init(&name1, NULL);
 120         dns_name_init(&name2, NULL);
 121
 122         dns_rdata_toregion(rdata1, &region1);
 123         dns_rdata_toregion(rdata2, &region2);
 124
 125         dns_name_fromregion(&name1, &region1);
 126         dns_name_fromregion(&name2, &region2);
 127
 128         return (dns_name_rdatacompare(&name1, &name2));
 129 }
 130
 131 static inline isc_result_t
 132 fromstruct_cname(ARGS_FROMSTRUCT) {
 133         dns_rdata_cname_t *cname = source;
 134         isc_region_t region;
 135
 136         REQUIRE(type == 5);
 137         REQUIRE(source != NULL);
 138         REQUIRE(cname->common.rdtype == type);
 139         REQUIRE(cname->common.rdclass == rdclass);
 140
 141         UNUSED(type);
 142         UNUSED(rdclass);
 143
 144         dns_name_toregion(&cname->cname, &region);
 145         return (isc_buffer_copyregion(target, &region));
 146 }
 147
 148 static inline isc_result_t
 149 tostruct_cname(ARGS_TOSTRUCT) {
 150         isc_region_t region;
 151         dns_rdata_cname_t *cname = target;
 152         dns_name_t name;
 153
 154         REQUIRE(rdata->type == 5);
 155         REQUIRE(target != NULL);
 156         REQUIRE(rdata->length != 0);
 157
 158         cname->common.rdclass = rdata->rdclass;
 159         cname->common.rdtype = rdata->type;
 160         ISC_LINK_INIT(&cname->common, link);
 161
 162         dns_name_init(&name, NULL);
 163         dns_rdata_toregion(rdata, &region);
 164         dns_name_fromregion(&name, &region);
 165         dns_name_init(&cname->cname, NULL);
 166         RETERR(name_duporclone(&name, mctx, &cname->cname));
 167         cname->mctx = mctx;
 168         return (ISC_R_SUCCESS);
 169 }
 170
 171 static inline void
 172 freestruct_cname(ARGS_FREESTRUCT) {
 173         dns_rdata_cname_t *cname = source;
 174
 175         REQUIRE(source != NULL);
 176
 177         if (cname->mctx == NULL)
 178                 return;
 179
 180         dns_name_free(&cname->cname, cname->mctx);
 181         cname->mctx = NULL;
 182 }
 183
 184 static inline isc_result_t
 185 additionaldata_cname(ARGS_ADDLDATA) {
 186         UNUSED(rdata);
 187         UNUSED(add);
 188         UNUSED(arg);
 189
 190         REQUIRE(rdata->type == 5);
 191
 192         return (ISC_R_SUCCESS);
 193 }
 194
 195 static inline isc_result_t
 196 digest_cname(ARGS_DIGEST) {
 197         isc_region_t r;
 198         dns_name_t name;
 199
 200         REQUIRE(rdata->type == 5);
 201
 202         dns_rdata_toregion(rdata, &r);
 203         dns_name_init(&name, NULL);
 204         dns_name_fromregion(&name, &r);
 205
 206         return (dns_name_digest(&name, digest, arg));
 207 }
 208
 209 static inline isc_boolean_t
 210 checkowner_cname(ARGS_CHECKOWNER) {
 211
 212         REQUIRE(type == 5);
 213
 214         UNUSED(name);
 215         UNUSED(type);
 216         UNUSED(rdclass);
 217         UNUSED(wildcard);
 218
 219         return (ISC_TRUE);
 220 }
 221
 222 static inline isc_boolean_t
 223 checknames_cname(ARGS_CHECKNAMES) {
 224
 225         REQUIRE(rdata->type == 5);
 226
 227         UNUSED(rdata);
 228         UNUSED(owner);
 229         UNUSED(bad);
 230
 231         return (ISC_TRUE);
 232 }
 233
 234 static inline int
 235 casecompare_cname(ARGS_COMPARE) {
 236         return (compare_cname(rdata1, rdata2));
 237 }
 238
 239 #endif  /* RDATA_GENERIC_CNAME_5_C */