contrib/bind9/lib/dns/rdata/generic/nsec_47.c

   1 /*
   2  * Copyright (C) 2004, 2007-2009, 2011, 2015  Internet Systems Consortium, Inc. ("ISC")
   3  * Copyright (C) 2003  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: nsec_47.c,v 1.15 2011/01/13 04:59:26 tbox Exp $ */
  19
  20 /* reviewed: Wed Mar 15 18:21:15 PST 2000 by brister */
  21
  22 /* RFC 3845 */
  23
  24 #ifndef RDATA_GENERIC_NSEC_47_C
  25 #define RDATA_GENERIC_NSEC_47_C
  26
  27 /*
  28  * The attributes do not include DNS_RDATATYPEATTR_SINGLETON
  29  * because we must be able to handle a parent/child NSEC pair.
  30  */
  31 #define RRTYPE_NSEC_ATTRIBUTES (DNS_RDATATYPEATTR_DNSSEC)
  32
  33 static inline isc_result_t
  34 fromtext_nsec(ARGS_FROMTEXT) {
  35         isc_token_t token;
  36         dns_name_t name;
  37         isc_buffer_t buffer;
  38
  39         REQUIRE(type == dns_rdatatype_nsec);
  40
  41         UNUSED(type);
  42         UNUSED(rdclass);
  43         UNUSED(callbacks);
  44
  45         /*
  46          * Next domain.
  47          */
  48         RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_string,
  49                                       ISC_FALSE));
  50         dns_name_init(&name, NULL);
  51         buffer_fromregion(&buffer, &token.value.as_region);
  52         if (origin == NULL)
  53                 origin = dns_rootname;
  54         RETTOK(dns_name_fromtext(&name, &buffer, origin, options, target));
  55
  56         return (typemap_fromtext(lexer, target, ISC_FALSE));
  57 }
  58
  59 static inline isc_result_t
  60 totext_nsec(ARGS_TOTEXT) {
  61         isc_region_t sr;
  62         dns_name_t name;
  63
  64         REQUIRE(rdata->type == dns_rdatatype_nsec);
  65         REQUIRE(rdata->length != 0);
  66
  67         UNUSED(tctx);
  68
  69         dns_name_init(&name, NULL);
  70         dns_rdata_toregion(rdata, &sr);
  71         dns_name_fromregion(&name, &sr);
  72         isc_region_consume(&sr, name_length(&name));
  73         RETERR(dns_name_totext(&name, ISC_FALSE, target));
  74         return (typemap_totext(&sr, NULL, target));
  75 }
  76
  77 static /* inline */ isc_result_t
  78 fromwire_nsec(ARGS_FROMWIRE) {
  79         isc_region_t sr;
  80         dns_name_t name;
  81
  82         REQUIRE(type == dns_rdatatype_nsec);
  83
  84         UNUSED(type);
  85         UNUSED(rdclass);
  86
  87         dns_decompress_setmethods(dctx, DNS_COMPRESS_NONE);
  88
  89         dns_name_init(&name, NULL);
  90         RETERR(dns_name_fromwire(&name, source, dctx, options, target));
  91
  92         isc_buffer_activeregion(source, &sr);
  93         RETERR(typemap_test(&sr, ISC_FALSE));
  94         RETERR(mem_tobuffer(target, sr.base, sr.length));
  95         isc_buffer_forward(source, sr.length);
  96         return (ISC_R_SUCCESS);
  97 }
  98
  99 static inline isc_result_t
 100 towire_nsec(ARGS_TOWIRE) {
 101         isc_region_t sr;
 102         dns_name_t name;
 103         dns_offsets_t offsets;
 104
 105         REQUIRE(rdata->type == dns_rdatatype_nsec);
 106         REQUIRE(rdata->length != 0);
 107
 108         dns_compress_setmethods(cctx, DNS_COMPRESS_NONE);
 109         dns_name_init(&name, offsets);
 110         dns_rdata_toregion(rdata, &sr);
 111         dns_name_fromregion(&name, &sr);
 112         isc_region_consume(&sr, name_length(&name));
 113         RETERR(dns_name_towire(&name, cctx, target));
 114
 115         return (mem_tobuffer(target, sr.base, sr.length));
 116 }
 117
 118 static inline int
 119 compare_nsec(ARGS_COMPARE) {
 120         isc_region_t r1;
 121         isc_region_t r2;
 122
 123         REQUIRE(rdata1->type == rdata2->type);
 124         REQUIRE(rdata1->rdclass == rdata2->rdclass);
 125         REQUIRE(rdata1->type == dns_rdatatype_nsec);
 126         REQUIRE(rdata1->length != 0);
 127         REQUIRE(rdata2->length != 0);
 128
 129         dns_rdata_toregion(rdata1, &r1);
 130         dns_rdata_toregion(rdata2, &r2);
 131         return (isc_region_compare(&r1, &r2));
 132 }
 133
 134 static inline isc_result_t
 135 fromstruct_nsec(ARGS_FROMSTRUCT) {
 136         dns_rdata_nsec_t *nsec = source;
 137         isc_region_t region;
 138
 139         REQUIRE(type == dns_rdatatype_nsec);
 140         REQUIRE(source != NULL);
 141         REQUIRE(nsec->common.rdtype == type);
 142         REQUIRE(nsec->common.rdclass == rdclass);
 143         REQUIRE(nsec->typebits != NULL || nsec->len == 0);
 144
 145         UNUSED(type);
 146         UNUSED(rdclass);
 147
 148         dns_name_toregion(&nsec->next, &region);
 149         RETERR(isc_buffer_copyregion(target, &region));
 150
 151         region.base = nsec->typebits;
 152         region.length = nsec->len;
 153         RETERR(typemap_test(&region, ISC_FALSE));
 154         return (mem_tobuffer(target, nsec->typebits, nsec->len));
 155 }
 156
 157 static inline isc_result_t
 158 tostruct_nsec(ARGS_TOSTRUCT) {
 159         isc_region_t region;
 160         dns_rdata_nsec_t *nsec = target;
 161         dns_name_t name;
 162
 163         REQUIRE(rdata->type == dns_rdatatype_nsec);
 164         REQUIRE(target != NULL);
 165         REQUIRE(rdata->length != 0);
 166
 167         nsec->common.rdclass = rdata->rdclass;
 168         nsec->common.rdtype = rdata->type;
 169         ISC_LINK_INIT(&nsec->common, link);
 170
 171         dns_name_init(&name, NULL);
 172         dns_rdata_toregion(rdata, &region);
 173         dns_name_fromregion(&name, &region);
 174         isc_region_consume(&region, name_length(&name));
 175         dns_name_init(&nsec->next, NULL);
 176         RETERR(name_duporclone(&name, mctx, &nsec->next));
 177
 178         nsec->len = region.length;
 179         nsec->typebits = mem_maybedup(mctx, region.base, region.length);
 180         if (nsec->typebits == NULL)
 181                 goto cleanup;
 182
 183         nsec->mctx = mctx;
 184         return (ISC_R_SUCCESS);
 185
 186  cleanup:
 187         if (mctx != NULL)
 188                 dns_name_free(&nsec->next, mctx);
 189         return (ISC_R_NOMEMORY);
 190 }
 191
 192 static inline void
 193 freestruct_nsec(ARGS_FREESTRUCT) {
 194         dns_rdata_nsec_t *nsec = source;
 195
 196         REQUIRE(source != NULL);
 197         REQUIRE(nsec->common.rdtype == dns_rdatatype_nsec);
 198
 199         if (nsec->mctx == NULL)
 200                 return;
 201
 202         dns_name_free(&nsec->next, nsec->mctx);
 203         if (nsec->typebits != NULL)
 204                 isc_mem_free(nsec->mctx, nsec->typebits);
 205         nsec->mctx = NULL;
 206 }
 207
 208 static inline isc_result_t
 209 additionaldata_nsec(ARGS_ADDLDATA) {
 210         REQUIRE(rdata->type == dns_rdatatype_nsec);
 211
 212         UNUSED(rdata);
 213         UNUSED(add);
 214         UNUSED(arg);
 215
 216         return (ISC_R_SUCCESS);
 217 }
 218
 219 static inline isc_result_t
 220 digest_nsec(ARGS_DIGEST) {
 221         isc_region_t r;
 222
 223         REQUIRE(rdata->type == dns_rdatatype_nsec);
 224
 225         dns_rdata_toregion(rdata, &r);
 226         return ((digest)(arg, &r));
 227 }
 228
 229 static inline isc_boolean_t
 230 checkowner_nsec(ARGS_CHECKOWNER) {
 231
 232        REQUIRE(type == dns_rdatatype_nsec);
 233
 234        UNUSED(name);
 235        UNUSED(type);
 236        UNUSED(rdclass);
 237        UNUSED(wildcard);
 238
 239        return (ISC_TRUE);
 240 }
 241
 242 static inline isc_boolean_t
 243 checknames_nsec(ARGS_CHECKNAMES) {
 244
 245         REQUIRE(rdata->type == dns_rdatatype_nsec);
 246
 247         UNUSED(rdata);
 248         UNUSED(owner);
 249         UNUSED(bad);
 250
 251         return (ISC_TRUE);
 252 }
 253
 254 static inline int
 255 casecompare_nsec(ARGS_COMPARE) {
 256         isc_region_t region1;
 257         isc_region_t region2;
 258         dns_name_t name1;
 259         dns_name_t name2;
 260         int order;
 261
 262         REQUIRE(rdata1->type == rdata2->type);
 263         REQUIRE(rdata1->rdclass == rdata2->rdclass);
 264         REQUIRE(rdata1->type == dns_rdatatype_nsec);
 265         REQUIRE(rdata1->length != 0);
 266         REQUIRE(rdata2->length != 0);
 267
 268         dns_name_init(&name1, NULL);
 269         dns_name_init(&name2, NULL);
 270
 271         dns_rdata_toregion(rdata1, &region1);
 272         dns_rdata_toregion(rdata2, &region2);
 273
 274         dns_name_fromregion(&name1, &region1);
 275         dns_name_fromregion(&name2, &region2);
 276
 277         order = dns_name_rdatacompare(&name1, &name2);
 278         if (order != 0)
 279                 return (order);
 280
 281         isc_region_consume(&region1, name_length(&name1));
 282         isc_region_consume(&region2, name_length(&name2));
 283
 284         return (isc_region_compare(&region1, &region2));
 285 }
 286 #endif  /* RDATA_GENERIC_NSEC_47_C */