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
fromtext_nsec(ARGS_FROMTEXT)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
totext_nsec(ARGS_TOTEXT)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
fromwire_nsec(ARGS_FROMWIRE)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
towire_nsec(ARGS_TOWIRE)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
compare_nsec(ARGS_COMPARE)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
fromstruct_nsec(ARGS_FROMSTRUCT)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, ®ion);
149 RETERR(isc_buffer_copyregion(target, ®ion));
150
151 region.base = nsec->typebits;
152 region.length = nsec->len;
153 RETERR(typemap_test(®ion, ISC_FALSE));
154 return (mem_tobuffer(target, nsec->typebits, nsec->len));
155 }
156
157 static inline isc_result_t
tostruct_nsec(ARGS_TOSTRUCT)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, ®ion);
173 dns_name_fromregion(&name, ®ion);
174 isc_region_consume(®ion, 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
freestruct_nsec(ARGS_FREESTRUCT)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
additionaldata_nsec(ARGS_ADDLDATA)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
digest_nsec(ARGS_DIGEST)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
checkowner_nsec(ARGS_CHECKOWNER)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
checknames_nsec(ARGS_CHECKNAMES)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
casecompare_nsec(ARGS_COMPARE)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, ®ion1);
272 dns_rdata_toregion(rdata2, ®ion2);
273
274 dns_name_fromregion(&name1, ®ion1);
275 dns_name_fromregion(&name2, ®ion2);
276
277 order = dns_name_rdatacompare(&name1, &name2);
278 if (order != 0)
279 return (order);
280
281 isc_region_consume(®ion1, name_length(&name1));
282 isc_region_consume(®ion2, name_length(&name2));
283
284 return (isc_region_compare(®ion1, ®ion2));
285 }
286 #endif /* RDATA_GENERIC_NSEC_47_C */
287