contrib/bind-9.2.4rc7/lib/dns/rdata/generic/rt_21.c

   1 /*
   2  * Copyright (C) 2004  Internet Systems Consortium, Inc. ("ISC")
   3  * Copyright (C) 1999-2001, 2003  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: rt_21.c,v 1.37.2.3 2004/03/09 06:11:33 marka Exp $ */
  19
  20 /* reviewed: Thu Mar 16 15:02:31 PST 2000 by brister */
  21
  22 /* RFC 1183 */
  23
  24 #ifndef RDATA_GENERIC_RT_21_C
  25 #define RDATA_GENERIC_RT_21_C
  26
  27 #define RRTYPE_RT_ATTRIBUTES (0)
  28
  29 static inline isc_result_t
  30 fromtext_rt(ARGS_FROMTEXT) {
  31         isc_token_t token;
  32         dns_name_t name;
  33         isc_buffer_t buffer;
  34
  35         REQUIRE(type == 21);
  36
  37         UNUSED(type);
  38         UNUSED(rdclass);
  39         UNUSED(callbacks);
  40
  41         RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_number,
  42                                       ISC_FALSE));
  43         if (token.value.as_ulong > 0xffffU)
  44                 RETTOK(ISC_R_RANGE);
  45         RETERR(uint16_tobuffer(token.value.as_ulong, target));
  46
  47         RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_string,
  48                                       ISC_FALSE));
  49
  50         dns_name_init(&name, NULL);
  51         buffer_fromregion(&buffer, &token.value.as_region);
  52         origin = (origin != NULL) ? origin : dns_rootname;
  53         RETTOK(dns_name_fromtext(&name, &buffer, origin, downcase, target));
  54         return (ISC_R_SUCCESS);
  55 }
  56
  57 static inline isc_result_t
  58 totext_rt(ARGS_TOTEXT) {
  59         isc_region_t region;
  60         dns_name_t name;
  61         dns_name_t prefix;
  62         isc_boolean_t sub;
  63         char buf[sizeof "64000"];
  64         unsigned short num;
  65
  66         REQUIRE(rdata->type == 21);
  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         num = uint16_fromregion(&region);
  74         isc_region_consume(&region, 2);
  75         sprintf(buf, "%u", num);
  76         RETERR(str_totext(buf, target));
  77         RETERR(str_totext(" ", target));
  78         dns_name_fromregion(&name, &region);
  79         sub = name_prefix(&name, tctx->origin, &prefix);
  80         return (dns_name_totext(&prefix, sub, target));
  81 }
  82
  83 static inline isc_result_t
  84 fromwire_rt(ARGS_FROMWIRE) {
  85         dns_name_t name;
  86         isc_region_t sregion;
  87         isc_region_t tregion;
  88
  89         REQUIRE(type == 21);
  90
  91         UNUSED(type);
  92         UNUSED(rdclass);
  93
  94         dns_decompress_setmethods(dctx, DNS_COMPRESS_NONE);
  95
  96         dns_name_init(&name, NULL);
  97
  98         isc_buffer_activeregion(source, &sregion);
  99         isc_buffer_availableregion(target, &tregion);
 100         if (tregion.length < 2)
 101                 return (ISC_R_NOSPACE);
 102         if (sregion.length < 2)
 103                 return (ISC_R_UNEXPECTEDEND);
 104         memcpy(tregion.base, sregion.base, 2);
 105         isc_buffer_forward(source, 2);
 106         isc_buffer_add(target, 2);
 107         return (dns_name_fromwire(&name, source, dctx, downcase, target));
 108 }
 109
 110 static inline isc_result_t
 111 towire_rt(ARGS_TOWIRE) {
 112         dns_name_t name;
 113         dns_offsets_t offsets;
 114         isc_region_t region;
 115         isc_region_t tr;
 116
 117         REQUIRE(rdata->type == 21);
 118         REQUIRE(rdata->length != 0);
 119
 120         dns_compress_setmethods(cctx, DNS_COMPRESS_NONE);
 121         isc_buffer_availableregion(target, &tr);
 122         dns_rdata_toregion(rdata, &region);
 123         if (tr.length < 2)
 124                 return (ISC_R_NOSPACE);
 125         memcpy(tr.base, region.base, 2);
 126         isc_region_consume(&region, 2);
 127         isc_buffer_add(target, 2);
 128
 129         dns_name_init(&name, offsets);
 130         dns_name_fromregion(&name, &region);
 131
 132         return (dns_name_towire(&name, cctx, target));
 133 }
 134
 135 static inline int
 136 compare_rt(ARGS_COMPARE) {
 137         dns_name_t name1;
 138         dns_name_t name2;
 139         isc_region_t region1;
 140         isc_region_t region2;
 141         int order;
 142
 143         REQUIRE(rdata1->type == rdata2->type);
 144         REQUIRE(rdata1->rdclass == rdata2->rdclass);
 145         REQUIRE(rdata1->type == 21);
 146         REQUIRE(rdata1->length != 0);
 147         REQUIRE(rdata2->length != 0);
 148
 149         order = memcmp(rdata1->data, rdata2->data, 2);
 150         if (order != 0)
 151                 return (order < 0 ? -1 : 1);
 152
 153         dns_name_init(&name1, NULL);
 154         dns_name_init(&name2, NULL);
 155
 156         dns_rdata_toregion(rdata1, &region1);
 157         dns_rdata_toregion(rdata2, &region2);
 158
 159         isc_region_consume(&region1, 2);
 160         isc_region_consume(&region2, 2);
 161
 162         dns_name_fromregion(&name1, &region1);
 163         dns_name_fromregion(&name2, &region2);
 164
 165         return (dns_name_rdatacompare(&name1, &name2));
 166 }
 167
 168 static inline isc_result_t
 169 fromstruct_rt(ARGS_FROMSTRUCT) {
 170         dns_rdata_rt_t *rt = source;
 171         isc_region_t region;
 172
 173         REQUIRE(type == 21);
 174         REQUIRE(source != NULL);
 175         REQUIRE(rt->common.rdtype == type);
 176         REQUIRE(rt->common.rdclass == rdclass);
 177
 178         UNUSED(type);
 179         UNUSED(rdclass);
 180
 181         RETERR(uint16_tobuffer(rt->preference, target));
 182         dns_name_toregion(&rt->host, &region);
 183         return (isc_buffer_copyregion(target, &region));
 184 }
 185
 186 static inline isc_result_t
 187 tostruct_rt(ARGS_TOSTRUCT) {
 188         isc_region_t region;
 189         dns_rdata_rt_t *rt = target;
 190         dns_name_t name;
 191
 192         REQUIRE(rdata->type == 21);
 193         REQUIRE(target != NULL);
 194         REQUIRE(rdata->length != 0);
 195
 196         rt->common.rdclass = rdata->rdclass;
 197         rt->common.rdtype = rdata->type;
 198         ISC_LINK_INIT(&rt->common, link);
 199
 200         dns_name_init(&name, NULL);
 201         dns_rdata_toregion(rdata, &region);
 202         rt->preference = uint16_fromregion(&region);
 203         isc_region_consume(&region, 2);
 204         dns_name_fromregion(&name, &region);
 205         dns_name_init(&rt->host, NULL);
 206         RETERR(name_duporclone(&name, mctx, &rt->host));
 207
 208         rt->mctx = mctx;
 209         return (ISC_R_SUCCESS);
 210 }
 211
 212 static inline void
 213 freestruct_rt(ARGS_FREESTRUCT) {
 214         dns_rdata_rt_t *rt = source;
 215
 216         REQUIRE(source != NULL);
 217         REQUIRE(rt->common.rdtype == 21);
 218
 219         if (rt->mctx == NULL)
 220                 return;
 221
 222         dns_name_free(&rt->host, rt->mctx);
 223         rt->mctx = NULL;
 224 }
 225
 226 static inline isc_result_t
 227 additionaldata_rt(ARGS_ADDLDATA) {
 228         dns_name_t name;
 229         dns_offsets_t offsets;
 230         isc_region_t region;
 231         isc_result_t result;
 232
 233         REQUIRE(rdata->type == 21);
 234
 235         dns_name_init(&name, offsets);
 236         dns_rdata_toregion(rdata, &region);
 237         isc_region_consume(&region, 2);
 238         dns_name_fromregion(&name, &region);
 239
 240         result = (add)(arg, &name, dns_rdatatype_x25);
 241         if (result != ISC_R_SUCCESS)
 242                 return (result);
 243         result = (add)(arg, &name, dns_rdatatype_isdn);
 244         if (result != ISC_R_SUCCESS)
 245                 return (result);
 246         return ((add)(arg, &name, dns_rdatatype_a));
 247 }
 248
 249 static inline isc_result_t
 250 digest_rt(ARGS_DIGEST) {
 251         isc_region_t r1, r2;
 252         isc_result_t result;
 253         dns_name_t name;
 254
 255         REQUIRE(rdata->type == 21);
 256
 257         dns_rdata_toregion(rdata, &r1);
 258         r2 = r1;
 259         isc_region_consume(&r2, 2);
 260         r1.length = 2;
 261         result = (digest)(arg, &r1);
 262         if (result != ISC_R_SUCCESS)
 263                 return (result);
 264         dns_name_init(&name, NULL);
 265         dns_name_fromregion(&name, &r2);
 266         return (dns_name_digest(&name, digest, arg));
 267 }
 268
 269 #endif  /* RDATA_GENERIC_RT_21_C */