external/bsd/bind/dist/lib/dns/rdata/generic/nxt_30.c

   1 /*      $NetBSD: nxt_30.c,v 1.4 2014/12/10 04:37:59 christos Exp $      */
   2
   3 /*
   4  * Copyright (C) 2004, 2005, 2007, 2009  Internet Systems Consortium, Inc. ("ISC")
   5  * Copyright (C) 1999-2003  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: nxt_30.c,v 1.65 2009/12/04 22:06:37 tbox Exp  */
  21
  22 /* reviewed: Wed Mar 15 18:21:15 PST 2000 by brister */
  23
  24 /* RFC2535 */
  25
  26 #ifndef RDATA_GENERIC_NXT_30_C
  27 #define RDATA_GENERIC_NXT_30_C
  28
  29 /*
  30  * The attributes do not include DNS_RDATATYPEATTR_SINGLETON
  31  * because we must be able to handle a parent/child NXT pair.
  32  */
  33 #define RRTYPE_NXT_ATTRIBUTES (0)
  34
  35 static inline isc_result_t
  36 fromtext_nxt(ARGS_FROMTEXT) {
  37         isc_token_t token;
  38         dns_name_t name;
  39         isc_buffer_t buffer;
  40         char *e;
  41         unsigned char bm[8*1024]; /* 64k bits */
  42         dns_rdatatype_t covered;
  43         dns_rdatatype_t maxcovered = 0;
  44         isc_boolean_t first = ISC_TRUE;
  45         long n;
  46
  47         REQUIRE(type == 30);
  48
  49         UNUSED(type);
  50         UNUSED(rdclass);
  51         UNUSED(callbacks);
  52
  53         /*
  54          * Next domain.
  55          */
  56         RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_string,
  57                                       ISC_FALSE));
  58         dns_name_init(&name, NULL);
  59         buffer_fromregion(&buffer, &token.value.as_region);
  60         origin = (origin != NULL) ? origin : dns_rootname;
  61         RETTOK(dns_name_fromtext(&name, &buffer, origin, options, target));
  62
  63         memset(bm, 0, sizeof(bm));
  64         do {
  65                 RETERR(isc_lex_getmastertoken(lexer, &token,
  66                                               isc_tokentype_string, ISC_TRUE));
  67                 if (token.type != isc_tokentype_string)
  68                         break;
  69                 n = strtol(DNS_AS_STR(token), &e, 10);
  70                 if (e != DNS_AS_STR(token) && *e == '\0') {
  71                         covered = (dns_rdatatype_t)n;
  72                 } else if (dns_rdatatype_fromtext(&covered,
  73                                 &token.value.as_textregion) == DNS_R_UNKNOWN)
  74                         RETTOK(DNS_R_UNKNOWN);
  75                 /*
  76                  * NXT is only specified for types 1..127.
  77                  */
  78                 if (covered < 1 || covered > 127)
  79                         return (ISC_R_RANGE);
  80                 if (first || covered > maxcovered)
  81                         maxcovered = covered;
  82                 first = ISC_FALSE;
  83                 bm[covered/8] |= (0x80>>(covered%8));
  84         } while (1);
  85         isc_lex_ungettoken(lexer, &token);
  86         if (first)
  87                 return (ISC_R_SUCCESS);
  88         n = (maxcovered + 8) / 8;
  89         return (mem_tobuffer(target, bm, n));
  90 }
  91
  92 static inline isc_result_t
  93 totext_nxt(ARGS_TOTEXT) {
  94         isc_region_t sr;
  95         unsigned int i, j;
  96         dns_name_t name;
  97         dns_name_t prefix;
  98         isc_boolean_t sub;
  99
 100         REQUIRE(rdata->type == 30);
 101         REQUIRE(rdata->length != 0);
 102
 103         dns_name_init(&name, NULL);
 104         dns_name_init(&prefix, NULL);
 105         dns_rdata_toregion(rdata, &sr);
 106         dns_name_fromregion(&name, &sr);
 107         isc_region_consume(&sr, name_length(&name));
 108         sub = name_prefix(&name, tctx->origin, &prefix);
 109         RETERR(dns_name_totext(&prefix, sub, target));
 110
 111         for (i = 0; i < sr.length; i++) {
 112                 if (sr.base[i] != 0)
 113                         for (j = 0; j < 8; j++)
 114                                 if ((sr.base[i] & (0x80 >> j)) != 0) {
 115                                         dns_rdatatype_t t = i * 8 + j;
 116                                         RETERR(str_totext(" ", target));
 117                                         if (dns_rdatatype_isknown(t)) {
 118                                                 RETERR(dns_rdatatype_totext(t,
 119                                                                       target));
 120                                         } else {
 121                                                 char buf[sizeof("65535")];
 122                                                 sprintf(buf, "%u", t);
 123                                                 RETERR(str_totext(buf,
 124                                                                   target));
 125                                         }
 126                                 }
 127         }
 128         return (ISC_R_SUCCESS);
 129 }
 130
 131 static inline isc_result_t
 132 fromwire_nxt(ARGS_FROMWIRE) {
 133         isc_region_t sr;
 134         dns_name_t name;
 135
 136         REQUIRE(type == 30);
 137
 138         UNUSED(type);
 139         UNUSED(rdclass);
 140
 141         dns_decompress_setmethods(dctx, DNS_COMPRESS_NONE);
 142
 143         dns_name_init(&name, NULL);
 144         RETERR(dns_name_fromwire(&name, source, dctx, options, target));
 145
 146         isc_buffer_activeregion(source, &sr);
 147         if (sr.length > 0 && (sr.base[0] & 0x80) == 0 &&
 148             ((sr.length > 16) || sr.base[sr.length - 1] == 0))
 149                 return (DNS_R_BADBITMAP);
 150         RETERR(mem_tobuffer(target, sr.base, sr.length));
 151         isc_buffer_forward(source, sr.length);
 152         return (ISC_R_SUCCESS);
 153 }
 154
 155 static inline isc_result_t
 156 towire_nxt(ARGS_TOWIRE) {
 157         isc_region_t sr;
 158         dns_name_t name;
 159         dns_offsets_t offsets;
 160
 161         REQUIRE(rdata->type == 30);
 162         REQUIRE(rdata->length != 0);
 163
 164         dns_compress_setmethods(cctx, DNS_COMPRESS_NONE);
 165         dns_name_init(&name, offsets);
 166         dns_rdata_toregion(rdata, &sr);
 167         dns_name_fromregion(&name, &sr);
 168         isc_region_consume(&sr, name_length(&name));
 169         RETERR(dns_name_towire(&name, cctx, target));
 170
 171         return (mem_tobuffer(target, sr.base, sr.length));
 172 }
 173
 174 static inline int
 175 compare_nxt(ARGS_COMPARE) {
 176         isc_region_t r1;
 177         isc_region_t r2;
 178         dns_name_t name1;
 179         dns_name_t name2;
 180         int order;
 181
 182         REQUIRE(rdata1->type == rdata2->type);
 183         REQUIRE(rdata1->rdclass == rdata2->rdclass);
 184         REQUIRE(rdata1->type == 30);
 185         REQUIRE(rdata1->length != 0);
 186         REQUIRE(rdata2->length != 0);
 187
 188         dns_name_init(&name1, NULL);
 189         dns_name_init(&name2, NULL);
 190         dns_rdata_toregion(rdata1, &r1);
 191         dns_rdata_toregion(rdata2, &r2);
 192         dns_name_fromregion(&name1, &r1);
 193         dns_name_fromregion(&name2, &r2);
 194         order = dns_name_rdatacompare(&name1, &name2);
 195         if (order != 0)
 196                 return (order);
 197
 198         return (isc_region_compare(&r1, &r2));
 199 }
 200
 201 static inline isc_result_t
 202 fromstruct_nxt(ARGS_FROMSTRUCT) {
 203         dns_rdata_nxt_t *nxt = source;
 204         isc_region_t region;
 205
 206         REQUIRE(type == 30);
 207         REQUIRE(source != NULL);
 208         REQUIRE(nxt->common.rdtype == type);
 209         REQUIRE(nxt->common.rdclass == rdclass);
 210         REQUIRE(nxt->typebits != NULL || nxt->len == 0);
 211         if (nxt->typebits != NULL && (nxt->typebits[0] & 0x80) == 0) {
 212                 REQUIRE(nxt->len <= 16);
 213                 REQUIRE(nxt->typebits[nxt->len - 1] != 0);
 214         }
 215
 216         UNUSED(type);
 217         UNUSED(rdclass);
 218
 219         dns_name_toregion(&nxt->next, &region);
 220         RETERR(isc_buffer_copyregion(target, &region));
 221
 222         return (mem_tobuffer(target, nxt->typebits, nxt->len));
 223 }
 224
 225 static inline isc_result_t
 226 tostruct_nxt(ARGS_TOSTRUCT) {
 227         isc_region_t region;
 228         dns_rdata_nxt_t *nxt = target;
 229         dns_name_t name;
 230
 231         REQUIRE(rdata->type == 30);
 232         REQUIRE(target != NULL);
 233         REQUIRE(rdata->length != 0);
 234
 235         nxt->common.rdclass = rdata->rdclass;
 236         nxt->common.rdtype = rdata->type;
 237         ISC_LINK_INIT(&nxt->common, link);
 238
 239         dns_name_init(&name, NULL);
 240         dns_rdata_toregion(rdata, &region);
 241         dns_name_fromregion(&name, &region);
 242         isc_region_consume(&region, name_length(&name));
 243         dns_name_init(&nxt->next, NULL);
 244         RETERR(name_duporclone(&name, mctx, &nxt->next));
 245
 246         nxt->len = region.length;
 247         nxt->typebits = mem_maybedup(mctx, region.base, region.length);
 248         if (nxt->typebits == NULL)
 249                 goto cleanup;
 250
 251         nxt->mctx = mctx;
 252         return (ISC_R_SUCCESS);
 253
 254  cleanup:
 255         if (mctx != NULL)
 256                 dns_name_free(&nxt->next, mctx);
 257         return (ISC_R_NOMEMORY);
 258 }
 259
 260 static inline void
 261 freestruct_nxt(ARGS_FREESTRUCT) {
 262         dns_rdata_nxt_t *nxt = source;
 263
 264         REQUIRE(source != NULL);
 265         REQUIRE(nxt->common.rdtype == 30);
 266
 267         if (nxt->mctx == NULL)
 268                 return;
 269
 270         dns_name_free(&nxt->next, nxt->mctx);
 271         if (nxt->typebits != NULL)
 272                 isc_mem_free(nxt->mctx, nxt->typebits);
 273         nxt->mctx = NULL;
 274 }
 275
 276 static inline isc_result_t
 277 additionaldata_nxt(ARGS_ADDLDATA) {
 278         REQUIRE(rdata->type == 30);
 279
 280         UNUSED(rdata);
 281         UNUSED(add);
 282         UNUSED(arg);
 283
 284         return (ISC_R_SUCCESS);
 285 }
 286
 287 static inline isc_result_t
 288 digest_nxt(ARGS_DIGEST) {
 289         isc_region_t r;
 290         dns_name_t name;
 291         isc_result_t result;
 292
 293         REQUIRE(rdata->type == 30);
 294
 295         dns_rdata_toregion(rdata, &r);
 296         dns_name_init(&name, NULL);
 297         dns_name_fromregion(&name, &r);
 298         result = dns_name_digest(&name, digest, arg);
 299         if (result != ISC_R_SUCCESS)
 300                 return (result);
 301         isc_region_consume(&r, name_length(&name));
 302
 303         return ((digest)(arg, &r));
 304 }
 305
 306 static inline isc_boolean_t
 307 checkowner_nxt(ARGS_CHECKOWNER) {
 308
 309         REQUIRE(type == 30);
 310
 311         UNUSED(name);
 312         UNUSED(type);
 313         UNUSED(rdclass);
 314         UNUSED(wildcard);
 315
 316         return (ISC_TRUE);
 317 }
 318
 319 static inline isc_boolean_t
 320 checknames_nxt(ARGS_CHECKNAMES) {
 321
 322         REQUIRE(rdata->type == 30);
 323
 324         UNUSED(rdata);
 325         UNUSED(owner);
 326         UNUSED(bad);
 327
 328         return (ISC_TRUE);
 329 }
 330
 331 static inline int
 332 casecompare_nxt(ARGS_COMPARE) {
 333         return (compare_nxt(rdata1, rdata2));
 334 }
 335 #endif  /* RDATA_GENERIC_NXT_30_C */