external/bsd/bind/dist/lib/dns/rdata/ch_3/a_1.c

   1 /*      $NetBSD: a_1.c,v 1.5 2014/12/10 04:37:58 christos Exp $ */
   2
   3 /*
   4  * Copyright (C) 2005, 2007, 2009, 2014  Internet Systems Consortium, Inc. ("ISC")
   5  *
   6  * Permission to use, copy, modify, and/or distribute this software for any
   7  * purpose with or without fee is hereby granted, provided that the above
   8  * copyright notice and this permission notice appear in all copies.
   9  *
  10  * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
  11  * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
  12  * AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
  13  * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
  14  * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
  15  * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
  16  * PERFORMANCE OF THIS SOFTWARE.
  17  */
  18
  19 /* Id: a_1.c,v 1.8 2009/12/04 22:06:37 tbox Exp  */
  20
  21 /* by Bjorn.Victor@it.uu.se, 2005-05-07 */
  22 /* Based on generic/soa_6.c and generic/mx_15.c */
  23
  24 #ifndef RDATA_CH_3_A_1_C
  25 #define RDATA_CH_3_A_1_C
  26
  27 #include <isc/net.h>
  28
  29 #define RRTYPE_A_ATTRIBUTES (0)
  30
  31 static inline isc_result_t
  32 fromtext_ch_a(ARGS_FROMTEXT) {
  33         isc_token_t token;
  34         dns_name_t name;
  35         isc_buffer_t buffer;
  36
  37         REQUIRE(type == 1);
  38         REQUIRE(rdclass == dns_rdataclass_ch); /* 3 */
  39
  40         UNUSED(type);
  41         UNUSED(callbacks);
  42
  43         RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_string,
  44                                       ISC_FALSE));
  45
  46         /* get domain name */
  47         dns_name_init(&name, NULL);
  48         buffer_fromregion(&buffer, &token.value.as_region);
  49         origin = (origin != NULL) ? origin : dns_rootname;
  50         RETTOK(dns_name_fromtext(&name, &buffer, origin, options, target));
  51         if ((options & DNS_RDATA_CHECKNAMES) != 0 &&
  52             (options & DNS_RDATA_CHECKREVERSE) != 0) {
  53                 isc_boolean_t ok;
  54                 ok = dns_name_ishostname(&name, ISC_FALSE);
  55                 if (!ok && (options & DNS_RDATA_CHECKNAMESFAIL) != 0)
  56                         RETTOK(DNS_R_BADNAME);
  57                 if (!ok && callbacks != NULL)
  58                         warn_badname(&name, lexer, callbacks);
  59         }
  60
  61         /* 16-bit octal address */
  62         RETERR(isc_lex_getoctaltoken(lexer, &token, ISC_FALSE));
  63         if (token.value.as_ulong > 0xffffU)
  64                 RETTOK(ISC_R_RANGE);
  65         return (uint16_tobuffer(token.value.as_ulong, target));
  66 }
  67
  68 static inline isc_result_t
  69 totext_ch_a(ARGS_TOTEXT) {
  70         isc_region_t region;
  71         dns_name_t name;
  72         dns_name_t prefix;
  73         isc_boolean_t sub;
  74         char buf[sizeof("0177777")];
  75         isc_uint16_t addr;
  76
  77         REQUIRE(rdata->type == 1);
  78         REQUIRE(rdata->rdclass == dns_rdataclass_ch); /* 3 */
  79         REQUIRE(rdata->length != 0);
  80
  81         dns_name_init(&name, NULL);
  82         dns_name_init(&prefix, NULL);
  83
  84         dns_rdata_toregion(rdata, &region);
  85         dns_name_fromregion(&name, &region);
  86         isc_region_consume(&region, name_length(&name));
  87         addr = uint16_fromregion(&region);
  88
  89         sub = name_prefix(&name, tctx->origin, &prefix);
  90         RETERR(dns_name_totext(&prefix, sub, target));
  91
  92         sprintf(buf, "%o", addr); /* note octal */
  93         RETERR(str_totext(" ", target));
  94         return (str_totext(buf, target));
  95 }
  96
  97 static inline isc_result_t
  98 fromwire_ch_a(ARGS_FROMWIRE) {
  99         isc_region_t sregion;
 100         isc_region_t tregion;
 101         dns_name_t name;
 102
 103         REQUIRE(type == 1);
 104         REQUIRE(rdclass == dns_rdataclass_ch);
 105
 106         UNUSED(type);
 107         UNUSED(rdclass);
 108
 109         dns_decompress_setmethods(dctx, DNS_COMPRESS_GLOBAL14);
 110
 111         dns_name_init(&name, NULL);
 112
 113         RETERR(dns_name_fromwire(&name, source, dctx, options, target));
 114
 115         isc_buffer_activeregion(source, &sregion);
 116         isc_buffer_availableregion(target, &tregion);
 117         if (sregion.length < 2)
 118                 return (ISC_R_UNEXPECTEDEND);
 119         if (tregion.length < 2)
 120                 return (ISC_R_NOSPACE);
 121
 122         memmove(tregion.base, sregion.base, 2);
 123         isc_buffer_forward(source, 2);
 124         isc_buffer_add(target, 2);
 125
 126         return (ISC_R_SUCCESS);
 127 }
 128
 129 static inline isc_result_t
 130 towire_ch_a(ARGS_TOWIRE) {
 131         dns_name_t name;
 132         dns_offsets_t offsets;
 133         isc_region_t sregion;
 134         isc_region_t tregion;
 135
 136         REQUIRE(rdata->type == 1);
 137         REQUIRE(rdata->rdclass == dns_rdataclass_ch);
 138         REQUIRE(rdata->length != 0);
 139
 140         dns_compress_setmethods(cctx, DNS_COMPRESS_GLOBAL14);
 141
 142         dns_name_init(&name, offsets);
 143
 144         dns_rdata_toregion(rdata, &sregion);
 145
 146         dns_name_fromregion(&name, &sregion);
 147         isc_region_consume(&sregion, name_length(&name));
 148         RETERR(dns_name_towire(&name, cctx, target));
 149
 150         isc_buffer_availableregion(target, &tregion);
 151         if (tregion.length < 2)
 152                 return (ISC_R_NOSPACE);
 153
 154         memmove(tregion.base, sregion.base, 2);
 155         isc_buffer_add(target, 2);
 156         return (ISC_R_SUCCESS);
 157 }
 158
 159 static inline int
 160 compare_ch_a(ARGS_COMPARE) {
 161         dns_name_t name1;
 162         dns_name_t name2;
 163         isc_region_t region1;
 164         isc_region_t region2;
 165         int order;
 166
 167         REQUIRE(rdata1->type == rdata2->type);
 168         REQUIRE(rdata1->rdclass == rdata2->rdclass);
 169         REQUIRE(rdata1->type == 1);
 170         REQUIRE(rdata1->rdclass == dns_rdataclass_ch);
 171         REQUIRE(rdata1->length != 0);
 172         REQUIRE(rdata2->length != 0);
 173
 174         dns_name_init(&name1, NULL);
 175         dns_name_init(&name2, NULL);
 176
 177         dns_rdata_toregion(rdata1, &region1);
 178         dns_rdata_toregion(rdata2, &region2);
 179
 180         dns_name_fromregion(&name1, &region1);
 181         dns_name_fromregion(&name2, &region2);
 182         isc_region_consume(&region1, name_length(&name1));
 183         isc_region_consume(&region2, name_length(&name2));
 184
 185         order = dns_name_rdatacompare(&name1, &name2);
 186         if (order != 0)
 187                 return (order);
 188
 189         order = memcmp(rdata1->data, rdata2->data, 2);
 190         if (order != 0)
 191                 order = (order < 0) ? -1 : 1;
 192         return (order);
 193 }
 194
 195 static inline isc_result_t
 196 fromstruct_ch_a(ARGS_FROMSTRUCT) {
 197         dns_rdata_ch_a_t *a = source;
 198         isc_region_t region;
 199
 200         REQUIRE(type == 1);
 201         REQUIRE(source != NULL);
 202         REQUIRE(a->common.rdtype == type);
 203         REQUIRE(a->common.rdclass == rdclass);
 204
 205         UNUSED(type);
 206         UNUSED(rdclass);
 207
 208         dns_name_toregion(&a->ch_addr_dom, &region);
 209         RETERR(isc_buffer_copyregion(target, &region));
 210
 211         return (uint16_tobuffer(ntohs(a->ch_addr), target));
 212 }
 213
 214 static inline isc_result_t
 215 tostruct_ch_a(ARGS_TOSTRUCT) {
 216         dns_rdata_ch_a_t *a = target;
 217         isc_region_t region;
 218         dns_name_t name;
 219
 220         REQUIRE(rdata->type == 1);
 221         REQUIRE(rdata->rdclass == dns_rdataclass_ch);
 222         REQUIRE(rdata->length != 0);
 223
 224         a->common.rdclass = rdata->rdclass;
 225         a->common.rdtype = rdata->type;
 226         ISC_LINK_INIT(&a->common, link);
 227
 228         dns_rdata_toregion(rdata, &region);
 229
 230         dns_name_init(&name, NULL);
 231         dns_name_fromregion(&name, &region);
 232         isc_region_consume(&region, name_length(&name));
 233
 234         dns_name_init(&a->ch_addr_dom, NULL);
 235         RETERR(name_duporclone(&name, mctx, &a->ch_addr_dom));
 236         a->ch_addr = htons(uint16_fromregion(&region));
 237         a->mctx = mctx;
 238         return (ISC_R_SUCCESS);
 239 }
 240
 241 static inline void
 242 freestruct_ch_a(ARGS_FREESTRUCT) {
 243         dns_rdata_ch_a_t *a = source;
 244
 245         REQUIRE(source != NULL);
 246         REQUIRE(a->common.rdtype == 1);
 247
 248         if (a->mctx == NULL)
 249                 return;
 250
 251         dns_name_free(&a->ch_addr_dom, a->mctx);
 252         a->mctx = NULL;
 253 }
 254
 255 static inline isc_result_t
 256 additionaldata_ch_a(ARGS_ADDLDATA) {
 257
 258         REQUIRE(rdata->type == 1);
 259         REQUIRE(rdata->rdclass == dns_rdataclass_ch);
 260
 261         UNUSED(rdata);
 262         UNUSED(add);
 263         UNUSED(arg);
 264
 265         return (ISC_R_SUCCESS);
 266 }
 267
 268 static inline isc_result_t
 269 digest_ch_a(ARGS_DIGEST) {
 270         isc_region_t r;
 271
 272         dns_name_t name;
 273
 274         REQUIRE(rdata->type == 1);
 275         REQUIRE(rdata->rdclass == dns_rdataclass_ch);
 276
 277         dns_rdata_toregion(rdata, &r);
 278         dns_name_init(&name, NULL);
 279         dns_name_fromregion(&name, &r);
 280         isc_region_consume(&r, name_length(&name));
 281         RETERR(dns_name_digest(&name, digest, arg));
 282         return ((digest)(arg, &r));
 283 }
 284
 285 static inline isc_boolean_t
 286 checkowner_ch_a(ARGS_CHECKOWNER) {
 287
 288         REQUIRE(type == 1);
 289         REQUIRE(rdclass == dns_rdataclass_ch);
 290
 291         UNUSED(type);
 292
 293         return (dns_name_ishostname(name, wildcard));
 294 }
 295
 296 static inline isc_boolean_t
 297 checknames_ch_a(ARGS_CHECKNAMES) {
 298         isc_region_t region;
 299         dns_name_t name;
 300
 301         REQUIRE(rdata->type == 1);
 302         REQUIRE(rdata->rdclass == dns_rdataclass_ch);
 303
 304         UNUSED(owner);
 305
 306         dns_rdata_toregion(rdata, &region);
 307         dns_name_init(&name, NULL);
 308         dns_name_fromregion(&name, &region);
 309         if (!dns_name_ishostname(&name, ISC_FALSE)) {
 310                 if (bad != NULL)
 311                         dns_name_clone(&name, bad);
 312                 return (ISC_FALSE);
 313         }
 314
 315         return (ISC_TRUE);
 316 }
 317
 318 static inline int
 319 casecompare_ch_a(ARGS_COMPARE) {
 320         return (compare_ch_a(rdata1, rdata2));
 321 }
 322 #endif  /* RDATA_CH_3_A_1_C */