external/bsd/bind/dist/lib/dns/rdata/generic/mx_15.c

   1 /*      $NetBSD$        */
   2
   3 /*
   4  * Copyright (C) 2004, 2005, 2007, 2009  Internet Systems Consortium, Inc. ("ISC")
   5  * Copyright (C) 1998-2001, 2003  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: mx_15.c,v 1.58 2009/12/04 22:06:37 tbox Exp */
  21
  22 /* reviewed: Wed Mar 15 18:05:46 PST 2000 by brister */
  23
  24 #ifndef RDATA_GENERIC_MX_15_C
  25 #define RDATA_GENERIC_MX_15_C
  26
  27 #include <string.h>
  28
  29 #include <isc/net.h>
  30
  31 #define RRTYPE_MX_ATTRIBUTES (0)
  32
  33 static isc_boolean_t
  34 check_mx(isc_token_t *token) {
  35         char tmp[sizeof("xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:123.123.123.123.")];
  36         struct in_addr addr;
  37         struct in6_addr addr6;
  38
  39         if (strlcpy(tmp, DNS_AS_STR(*token), sizeof(tmp)) >= sizeof(tmp))
  40                 return (ISC_TRUE);
  41
  42         if (tmp[strlen(tmp) - 1] == '.')
  43                 tmp[strlen(tmp) - 1] = '\0';
  44         if (inet_aton(tmp, &addr) == 1 ||
  45             inet_pton(AF_INET6, tmp, &addr6) == 1)
  46                 return (ISC_FALSE);
  47
  48         return (ISC_TRUE);
  49 }
  50
  51 static inline isc_result_t
  52 fromtext_mx(ARGS_FROMTEXT) {
  53         isc_token_t token;
  54         dns_name_t name;
  55         isc_buffer_t buffer;
  56         isc_boolean_t ok;
  57
  58         REQUIRE(type == 15);
  59
  60         UNUSED(type);
  61         UNUSED(rdclass);
  62         UNUSED(callbacks);
  63
  64         RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_number,
  65                                       ISC_FALSE));
  66         if (token.value.as_ulong > 0xffffU)
  67                 RETTOK(ISC_R_RANGE);
  68         RETERR(uint16_tobuffer(token.value.as_ulong, target));
  69
  70         RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_string,
  71                                       ISC_FALSE));
  72
  73         ok = ISC_TRUE;
  74         if ((options & DNS_RDATA_CHECKMX) != 0)
  75                 ok = check_mx(&token);
  76         if (!ok && (options & DNS_RDATA_CHECKMXFAIL) != 0)
  77                 RETTOK(DNS_R_MXISADDRESS);
  78         if (!ok && callbacks != NULL)
  79                 warn_badmx(&token, lexer, callbacks);
  80
  81         dns_name_init(&name, NULL);
  82         buffer_fromregion(&buffer, &token.value.as_region);
  83         origin = (origin != NULL) ? origin : dns_rootname;
  84         RETTOK(dns_name_fromtext(&name, &buffer, origin, options, target));
  85         ok = ISC_TRUE;
  86         if ((options & DNS_RDATA_CHECKNAMES) != 0)
  87                 ok = dns_name_ishostname(&name, ISC_FALSE);
  88         if (!ok && (options & DNS_RDATA_CHECKNAMESFAIL) != 0)
  89                 RETTOK(DNS_R_BADNAME);
  90         if (!ok && callbacks != NULL)
  91                 warn_badname(&name, lexer, callbacks);
  92         return (ISC_R_SUCCESS);
  93 }
  94
  95 static inline isc_result_t
  96 totext_mx(ARGS_TOTEXT) {
  97         isc_region_t region;
  98         dns_name_t name;
  99         dns_name_t prefix;
 100         isc_boolean_t sub;
 101         char buf[sizeof("64000")];
 102         unsigned short num;
 103
 104         REQUIRE(rdata->type == 15);
 105         REQUIRE(rdata->length != 0);
 106
 107         dns_name_init(&name, NULL);
 108         dns_name_init(&prefix, NULL);
 109
 110         dns_rdata_toregion(rdata, &region);
 111         num = uint16_fromregion(&region);
 112         isc_region_consume(&region, 2);
 113         sprintf(buf, "%u", num);
 114         RETERR(str_totext(buf, target));
 115
 116         RETERR(str_totext(" ", target));
 117
 118         dns_name_fromregion(&name, &region);
 119         sub = name_prefix(&name, tctx->origin, &prefix);
 120         return (dns_name_totext(&prefix, sub, target));
 121 }
 122
 123 static inline isc_result_t
 124 fromwire_mx(ARGS_FROMWIRE) {
 125         dns_name_t name;
 126         isc_region_t sregion;
 127
 128         REQUIRE(type == 15);
 129
 130         UNUSED(type);
 131         UNUSED(rdclass);
 132
 133         dns_decompress_setmethods(dctx, DNS_COMPRESS_GLOBAL14);
 134
 135         dns_name_init(&name, NULL);
 136
 137         isc_buffer_activeregion(source, &sregion);
 138         if (sregion.length < 2)
 139                 return (ISC_R_UNEXPECTEDEND);
 140         RETERR(mem_tobuffer(target, sregion.base, 2));
 141         isc_buffer_forward(source, 2);
 142         return (dns_name_fromwire(&name, source, dctx, options, target));
 143 }
 144
 145 static inline isc_result_t
 146 towire_mx(ARGS_TOWIRE) {
 147         dns_name_t name;
 148         dns_offsets_t offsets;
 149         isc_region_t region;
 150
 151         REQUIRE(rdata->type == 15);
 152         REQUIRE(rdata->length != 0);
 153
 154         dns_compress_setmethods(cctx, DNS_COMPRESS_GLOBAL14);
 155
 156         dns_rdata_toregion(rdata, &region);
 157         RETERR(mem_tobuffer(target, region.base, 2));
 158         isc_region_consume(&region, 2);
 159
 160         dns_name_init(&name, offsets);
 161         dns_name_fromregion(&name, &region);
 162
 163         return (dns_name_towire(&name, cctx, target));
 164 }
 165
 166 static inline int
 167 compare_mx(ARGS_COMPARE) {
 168         dns_name_t name1;
 169         dns_name_t name2;
 170         isc_region_t region1;
 171         isc_region_t region2;
 172         int order;
 173
 174         REQUIRE(rdata1->type == rdata2->type);
 175         REQUIRE(rdata1->rdclass == rdata2->rdclass);
 176         REQUIRE(rdata1->type == 15);
 177         REQUIRE(rdata1->length != 0);
 178         REQUIRE(rdata2->length != 0);
 179
 180         order = memcmp(rdata1->data, rdata2->data, 2);
 181         if (order != 0)
 182                 return (order < 0 ? -1 : 1);
 183
 184         dns_name_init(&name1, NULL);
 185         dns_name_init(&name2, NULL);
 186
 187         dns_rdata_toregion(rdata1, &region1);
 188         dns_rdata_toregion(rdata2, &region2);
 189
 190         isc_region_consume(&region1, 2);
 191         isc_region_consume(&region2, 2);
 192
 193         dns_name_fromregion(&name1, &region1);
 194         dns_name_fromregion(&name2, &region2);
 195
 196         return (dns_name_rdatacompare(&name1, &name2));
 197 }
 198
 199 static inline isc_result_t
 200 fromstruct_mx(ARGS_FROMSTRUCT) {
 201         dns_rdata_mx_t *mx = source;
 202         isc_region_t region;
 203
 204         REQUIRE(type == 15);
 205         REQUIRE(source != NULL);
 206         REQUIRE(mx->common.rdtype == type);
 207         REQUIRE(mx->common.rdclass == rdclass);
 208
 209         UNUSED(type);
 210         UNUSED(rdclass);
 211
 212         RETERR(uint16_tobuffer(mx->pref, target));
 213         dns_name_toregion(&mx->mx, &region);
 214         return (isc_buffer_copyregion(target, &region));
 215 }
 216
 217 static inline isc_result_t
 218 tostruct_mx(ARGS_TOSTRUCT) {
 219         isc_region_t region;
 220         dns_rdata_mx_t *mx = target;
 221         dns_name_t name;
 222
 223         REQUIRE(rdata->type == 15);
 224         REQUIRE(target != NULL);
 225         REQUIRE(rdata->length != 0);
 226
 227         mx->common.rdclass = rdata->rdclass;
 228         mx->common.rdtype = rdata->type;
 229         ISC_LINK_INIT(&mx->common, link);
 230
 231         dns_name_init(&name, NULL);
 232         dns_rdata_toregion(rdata, &region);
 233         mx->pref = uint16_fromregion(&region);
 234         isc_region_consume(&region, 2);
 235         dns_name_fromregion(&name, &region);
 236         dns_name_init(&mx->mx, NULL);
 237         RETERR(name_duporclone(&name, mctx, &mx->mx));
 238         mx->mctx = mctx;
 239         return (ISC_R_SUCCESS);
 240 }
 241
 242 static inline void
 243 freestruct_mx(ARGS_FREESTRUCT) {
 244         dns_rdata_mx_t *mx = source;
 245
 246         REQUIRE(source != NULL);
 247         REQUIRE(mx->common.rdtype == 15);
 248
 249         if (mx->mctx == NULL)
 250                 return;
 251
 252         dns_name_free(&mx->mx, mx->mctx);
 253         mx->mctx = NULL;
 254 }
 255
 256 static inline isc_result_t
 257 additionaldata_mx(ARGS_ADDLDATA) {
 258         dns_name_t name;
 259         dns_offsets_t offsets;
 260         isc_region_t region;
 261
 262         REQUIRE(rdata->type == 15);
 263
 264         dns_name_init(&name, offsets);
 265         dns_rdata_toregion(rdata, &region);
 266         isc_region_consume(&region, 2);
 267         dns_name_fromregion(&name, &region);
 268
 269         return ((add)(arg, &name, dns_rdatatype_a));
 270 }
 271
 272 static inline isc_result_t
 273 digest_mx(ARGS_DIGEST) {
 274         isc_region_t r1, r2;
 275         dns_name_t name;
 276
 277         REQUIRE(rdata->type == 15);
 278
 279         dns_rdata_toregion(rdata, &r1);
 280         r2 = r1;
 281         isc_region_consume(&r2, 2);
 282         r1.length = 2;
 283         RETERR((digest)(arg, &r1));
 284         dns_name_init(&name, NULL);
 285         dns_name_fromregion(&name, &r2);
 286         return (dns_name_digest(&name, digest, arg));
 287 }
 288
 289 static inline isc_boolean_t
 290 checkowner_mx(ARGS_CHECKOWNER) {
 291
 292         REQUIRE(type == 15);
 293
 294         UNUSED(type);
 295         UNUSED(rdclass);
 296
 297         return (dns_name_ishostname(name, wildcard));
 298 }
 299
 300 static inline isc_boolean_t
 301 checknames_mx(ARGS_CHECKNAMES) {
 302         isc_region_t region;
 303         dns_name_t name;
 304
 305         REQUIRE(rdata->type == 15);
 306
 307         UNUSED(owner);
 308
 309         dns_rdata_toregion(rdata, &region);
 310         isc_region_consume(&region, 2);
 311         dns_name_init(&name, NULL);
 312         dns_name_fromregion(&name, &region);
 313         if (!dns_name_ishostname(&name, ISC_FALSE)) {
 314                 if (bad != NULL)
 315                         dns_name_clone(&name, bad);
 316                 return (ISC_FALSE);
 317         }
 318         return (ISC_TRUE);
 319 }
 320
 321 static inline int
 322 casecompare_mx(ARGS_COMPARE) {
 323         return (compare_mx(rdata1, rdata2));
 324 }
 325
 326 #endif  /* RDATA_GENERIC_MX_15_C */