contrib/bind-9.5.2/lib/dns/rdata/generic/cname_5.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: cname_5.c,v 1.47 2007/06/19 23:47:17 tbox Exp $ */
  19
  20 /* reviewed: Wed Mar 15 16:48:45 PST 2000 by brister */
  21
  22 #ifndef RDATA_GENERIC_CNAME_5_C
  23 #define RDATA_GENERIC_CNAME_5_C
  24
  25 #define RRTYPE_CNAME_ATTRIBUTES \
  26         (DNS_RDATATYPEATTR_EXCLUSIVE | DNS_RDATATYPEATTR_SINGLETON)
  27
  28 static inline isc_result_t
  29 fromtext_cname(ARGS_FROMTEXT) {
  30         isc_token_t token;
  31         dns_name_t name;
  32         isc_buffer_t buffer;
  33
  34         REQUIRE(type == 5);
  35
  36         UNUSED(type);
  37         UNUSED(rdclass);
  38         UNUSED(callbacks);
  39
  40         RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_string,
  41                                       ISC_FALSE));
  42
  43         dns_name_init(&name, NULL);
  44         buffer_fromregion(&buffer, &token.value.as_region);
  45         origin = (origin != NULL) ? origin : dns_rootname;
  46         RETTOK(dns_name_fromtext(&name, &buffer, origin, options, target));
  47         return (ISC_R_SUCCESS);
  48 }
  49
  50 static inline isc_result_t
  51 totext_cname(ARGS_TOTEXT) {
  52         isc_region_t region;
  53         dns_name_t name;
  54         dns_name_t prefix;
  55         isc_boolean_t sub;
  56
  57         REQUIRE(rdata->type == 5);
  58         REQUIRE(rdata->length != 0);
  59
  60         dns_name_init(&name, NULL);
  61         dns_name_init(&prefix, NULL);
  62
  63         dns_rdata_toregion(rdata, &region);
  64         dns_name_fromregion(&name, &region);
  65
  66         sub = name_prefix(&name, tctx->origin, &prefix);
  67
  68         return (dns_name_totext(&prefix, sub, target));
  69 }
  70
  71 static inline isc_result_t
  72 fromwire_cname(ARGS_FROMWIRE) {
  73         dns_name_t name;
  74
  75         REQUIRE(type == 5);
  76
  77         UNUSED(type);
  78         UNUSED(rdclass);
  79
  80         dns_decompress_setmethods(dctx, DNS_COMPRESS_GLOBAL14);
  81
  82         dns_name_init(&name, NULL);
  83         return (dns_name_fromwire(&name, source, dctx, options, target));
  84 }
  85
  86 static inline isc_result_t
  87 towire_cname(ARGS_TOWIRE) {
  88         dns_name_t name;
  89         dns_offsets_t offsets;
  90         isc_region_t region;
  91
  92         REQUIRE(rdata->type == 5);
  93         REQUIRE(rdata->length != 0);
  94
  95         dns_compress_setmethods(cctx, DNS_COMPRESS_GLOBAL14);
  96
  97         dns_name_init(&name, offsets);
  98         dns_rdata_toregion(rdata, &region);
  99         dns_name_fromregion(&name, &region);
 100
 101         return (dns_name_towire(&name, cctx, target));
 102 }
 103
 104 static inline int
 105 compare_cname(ARGS_COMPARE) {
 106         dns_name_t name1;
 107         dns_name_t name2;
 108         isc_region_t region1;
 109         isc_region_t region2;
 110
 111         REQUIRE(rdata1->type == rdata2->type);
 112         REQUIRE(rdata1->rdclass == rdata2->rdclass);
 113         REQUIRE(rdata1->type == 5);
 114         REQUIRE(rdata1->length != 0);
 115         REQUIRE(rdata2->length != 0);
 116
 117         dns_name_init(&name1, NULL);
 118         dns_name_init(&name2, NULL);
 119
 120         dns_rdata_toregion(rdata1, &region1);
 121         dns_rdata_toregion(rdata2, &region2);
 122
 123         dns_name_fromregion(&name1, &region1);
 124         dns_name_fromregion(&name2, &region2);
 125
 126         return (dns_name_rdatacompare(&name1, &name2));
 127 }
 128
 129 static inline isc_result_t
 130 fromstruct_cname(ARGS_FROMSTRUCT) {
 131         dns_rdata_cname_t *cname = source;
 132         isc_region_t region;
 133
 134         REQUIRE(type == 5);
 135         REQUIRE(source != NULL);
 136         REQUIRE(cname->common.rdtype == type);
 137         REQUIRE(cname->common.rdclass == rdclass);
 138
 139         UNUSED(type);
 140         UNUSED(rdclass);
 141
 142         dns_name_toregion(&cname->cname, &region);
 143         return (isc_buffer_copyregion(target, &region));
 144 }
 145
 146 static inline isc_result_t
 147 tostruct_cname(ARGS_TOSTRUCT) {
 148         isc_region_t region;
 149         dns_rdata_cname_t *cname = target;
 150         dns_name_t name;
 151
 152         REQUIRE(rdata->type == 5);
 153         REQUIRE(target != NULL);
 154         REQUIRE(rdata->length != 0);
 155
 156         cname->common.rdclass = rdata->rdclass;
 157         cname->common.rdtype = rdata->type;
 158         ISC_LINK_INIT(&cname->common, link);
 159
 160         dns_name_init(&name, NULL);
 161         dns_rdata_toregion(rdata, &region);
 162         dns_name_fromregion(&name, &region);
 163         dns_name_init(&cname->cname, NULL);
 164         RETERR(name_duporclone(&name, mctx, &cname->cname));
 165         cname->mctx = mctx;
 166         return (ISC_R_SUCCESS);
 167 }
 168
 169 static inline void
 170 freestruct_cname(ARGS_FREESTRUCT) {
 171         dns_rdata_cname_t *cname = source;
 172
 173         REQUIRE(source != NULL);
 174
 175         if (cname->mctx == NULL)
 176                 return;
 177
 178         dns_name_free(&cname->cname, cname->mctx);
 179         cname->mctx = NULL;
 180 }
 181
 182 static inline isc_result_t
 183 additionaldata_cname(ARGS_ADDLDATA) {
 184         UNUSED(rdata);
 185         UNUSED(add);
 186         UNUSED(arg);
 187
 188         REQUIRE(rdata->type == 5);
 189
 190         return (ISC_R_SUCCESS);
 191 }
 192
 193 static inline isc_result_t
 194 digest_cname(ARGS_DIGEST) {
 195         isc_region_t r;
 196         dns_name_t name;
 197
 198         REQUIRE(rdata->type == 5);
 199
 200         dns_rdata_toregion(rdata, &r);
 201         dns_name_init(&name, NULL);
 202         dns_name_fromregion(&name, &r);
 203
 204         return (dns_name_digest(&name, digest, arg));
 205 }
 206
 207 static inline isc_boolean_t
 208 checkowner_cname(ARGS_CHECKOWNER) {
 209
 210         REQUIRE(type == 5);
 211
 212         UNUSED(name);
 213         UNUSED(type);
 214         UNUSED(rdclass);
 215         UNUSED(wildcard);
 216
 217         return (ISC_TRUE);
 218 }
 219
 220 static inline isc_boolean_t
 221 checknames_cname(ARGS_CHECKNAMES) {
 222
 223         REQUIRE(rdata->type == 5);
 224
 225         UNUSED(rdata);
 226         UNUSED(owner);
 227         UNUSED(bad);
 228
 229         return (ISC_TRUE);
 230 }
 231
 232 #endif  /* RDATA_GENERIC_CNAME_5_C */