Commit | Line | Data |
---|---|---|
825eb42b JL |
1 | /* |
2 | * rr_function.c | |
3 | * | |
4 | * function that operate on specific rr types | |
5 | * | |
6 | * (c) NLnet Labs, 2004-2006 | |
7 | * See the file LICENSE for the license | |
8 | */ | |
9 | ||
10 | /* | |
11 | * These come strait from perldoc Net::DNS::RR::xxx | |
12 | * first the read variant, then the write. This is | |
13 | * not complete. | |
14 | */ | |
15 | ||
16 | #include <ldns/config.h> | |
17 | ||
18 | #include <ldns/ldns.h> | |
19 | ||
20 | #include <limits.h> | |
21 | #include <strings.h> | |
22 | ||
23 | /** | |
24 | * return a specific rdf | |
25 | * \param[in] type type of RR | |
26 | * \param[in] rr the rr itself | |
27 | * \param[in] pos at which postion to get it | |
28 | * \return the rdf sought | |
29 | */ | |
30 | static ldns_rdf * | |
31 | ldns_rr_function(ldns_rr_type type, const ldns_rr *rr, size_t pos) | |
32 | { | |
33 | if (!rr || ldns_rr_get_type(rr) != type) { | |
34 | return NULL; | |
35 | } | |
36 | return ldns_rr_rdf(rr, pos); | |
37 | } | |
38 | ||
39 | /** | |
40 | * set a specific rdf | |
41 | * \param[in] type type of RR | |
42 | * \param[in] rr the rr itself | |
43 | * \param[in] rdf the rdf to set | |
44 | * \param[in] pos at which postion to set it | |
45 | * \return true or false | |
46 | */ | |
47 | static bool | |
48 | ldns_rr_set_function(ldns_rr_type type, ldns_rr *rr, ldns_rdf *rdf, size_t pos) | |
49 | { | |
50 | ldns_rdf *pop; | |
51 | if (!rr || ldns_rr_get_type(rr) != type) { | |
52 | return false; | |
53 | } | |
54 | pop = ldns_rr_set_rdf(rr, rdf, pos); | |
55 | ldns_rdf_deep_free(pop); | |
56 | return true; | |
57 | } | |
58 | ||
59 | /* A/AAAA records */ | |
60 | ldns_rdf * | |
61 | ldns_rr_a_address(const ldns_rr *r) | |
62 | { | |
63 | /* 2 types to check, cannot use the macro */ | |
64 | if (!r || (ldns_rr_get_type(r) != LDNS_RR_TYPE_A && | |
65 | ldns_rr_get_type(r) != LDNS_RR_TYPE_AAAA)) { | |
66 | return NULL; | |
67 | } | |
68 | return ldns_rr_rdf(r, 0); | |
69 | } | |
70 | ||
71 | bool | |
72 | ldns_rr_a_set_address(ldns_rr *r, ldns_rdf *f) | |
73 | { | |
74 | /* 2 types to check, cannot use the macro... */ | |
75 | ldns_rdf *pop; | |
76 | if (!r || (ldns_rr_get_type(r) != LDNS_RR_TYPE_A && | |
77 | ldns_rr_get_type(r) != LDNS_RR_TYPE_AAAA)) { | |
78 | return false; | |
79 | } | |
80 | pop = ldns_rr_set_rdf(r, f, 0); | |
81 | if (pop) { | |
82 | LDNS_FREE(pop); | |
83 | return true; | |
84 | } else { | |
85 | return false; | |
86 | } | |
87 | } | |
88 | ||
89 | /* NS record */ | |
90 | ldns_rdf * | |
91 | ldns_rr_ns_nsdname(const ldns_rr *r) | |
92 | { | |
93 | return ldns_rr_function(LDNS_RR_TYPE_NS, r, 0); | |
94 | } | |
95 | ||
96 | /* MX record */ | |
97 | ldns_rdf * | |
98 | ldns_rr_mx_preference(const ldns_rr *r) | |
99 | { | |
100 | return ldns_rr_function(LDNS_RR_TYPE_MX, r, 0); | |
101 | } | |
102 | ||
103 | ldns_rdf * | |
104 | ldns_rr_mx_exchange(const ldns_rr *r) | |
105 | { | |
106 | return ldns_rr_function(LDNS_RR_TYPE_MX, r, 1); | |
107 | } | |
108 | ||
109 | /* RRSIG record */ | |
110 | ldns_rdf * | |
111 | ldns_rr_rrsig_typecovered(const ldns_rr *r) | |
112 | { | |
113 | return ldns_rr_function(LDNS_RR_TYPE_RRSIG, r, 0); | |
114 | } | |
115 | ||
116 | bool | |
117 | ldns_rr_rrsig_set_typecovered(ldns_rr *r, ldns_rdf *f) | |
118 | { | |
119 | return ldns_rr_set_function(LDNS_RR_TYPE_RRSIG, r, f, 0); | |
120 | } | |
121 | ||
122 | ldns_rdf * | |
123 | ldns_rr_rrsig_algorithm(const ldns_rr *r) | |
124 | { | |
125 | return ldns_rr_function(LDNS_RR_TYPE_RRSIG, r, 1); | |
126 | } | |
127 | ||
128 | bool | |
129 | ldns_rr_rrsig_set_algorithm(ldns_rr *r, ldns_rdf *f) | |
130 | { | |
131 | return ldns_rr_set_function(LDNS_RR_TYPE_RRSIG, r, f, 1); | |
132 | } | |
133 | ||
134 | ldns_rdf * | |
135 | ldns_rr_rrsig_labels(const ldns_rr *r) | |
136 | { | |
137 | return ldns_rr_function(LDNS_RR_TYPE_RRSIG, r, 2); | |
138 | } | |
139 | ||
140 | bool | |
141 | ldns_rr_rrsig_set_labels(ldns_rr *r, ldns_rdf *f) | |
142 | { | |
143 | return ldns_rr_set_function(LDNS_RR_TYPE_RRSIG, r, f, 2); | |
144 | } | |
145 | ||
146 | ldns_rdf * | |
147 | ldns_rr_rrsig_origttl(const ldns_rr *r) | |
148 | { | |
149 | return ldns_rr_function(LDNS_RR_TYPE_RRSIG, r, 3); | |
150 | } | |
151 | ||
152 | bool | |
153 | ldns_rr_rrsig_set_origttl(ldns_rr *r, ldns_rdf *f) | |
154 | { | |
155 | return ldns_rr_set_function(LDNS_RR_TYPE_RRSIG, r, f, 3); | |
156 | } | |
157 | ||
158 | ldns_rdf * | |
159 | ldns_rr_rrsig_expiration(const ldns_rr *r) | |
160 | { | |
161 | return ldns_rr_function(LDNS_RR_TYPE_RRSIG, r, 4); | |
162 | } | |
163 | ||
164 | bool | |
165 | ldns_rr_rrsig_set_expiration(ldns_rr *r, ldns_rdf *f) | |
166 | { | |
167 | return ldns_rr_set_function(LDNS_RR_TYPE_RRSIG, r, f, 4); | |
168 | } | |
169 | ||
170 | ldns_rdf * | |
171 | ldns_rr_rrsig_inception(const ldns_rr *r) | |
172 | { | |
173 | return ldns_rr_function(LDNS_RR_TYPE_RRSIG, r, 5); | |
174 | } | |
175 | ||
176 | bool | |
177 | ldns_rr_rrsig_set_inception(ldns_rr *r, ldns_rdf *f) | |
178 | { | |
179 | return ldns_rr_set_function(LDNS_RR_TYPE_RRSIG, r, f, 5); | |
180 | } | |
181 | ||
182 | ldns_rdf * | |
183 | ldns_rr_rrsig_keytag(const ldns_rr *r) | |
184 | { | |
185 | return ldns_rr_function(LDNS_RR_TYPE_RRSIG, r, 6); | |
186 | } | |
187 | ||
188 | bool | |
189 | ldns_rr_rrsig_set_keytag(ldns_rr *r, ldns_rdf *f) | |
190 | { | |
191 | return ldns_rr_set_function(LDNS_RR_TYPE_RRSIG, r, f, 6); | |
192 | } | |
193 | ||
194 | ldns_rdf * | |
195 | ldns_rr_rrsig_signame(const ldns_rr *r) | |
196 | { | |
197 | return ldns_rr_function(LDNS_RR_TYPE_RRSIG, r, 7); | |
198 | } | |
199 | ||
200 | bool | |
201 | ldns_rr_rrsig_set_signame(ldns_rr *r, ldns_rdf *f) | |
202 | { | |
203 | return ldns_rr_set_function(LDNS_RR_TYPE_RRSIG, r, f, 7); | |
204 | } | |
205 | ||
206 | ldns_rdf * | |
207 | ldns_rr_rrsig_sig(const ldns_rr *r) | |
208 | { | |
209 | return ldns_rr_function(LDNS_RR_TYPE_RRSIG, r, 8); | |
210 | } | |
211 | ||
212 | bool | |
213 | ldns_rr_rrsig_set_sig(ldns_rr *r, ldns_rdf *f) | |
214 | { | |
215 | return ldns_rr_set_function(LDNS_RR_TYPE_RRSIG, r, f, 8); | |
216 | } | |
217 | ||
218 | /* DNSKEY record */ | |
219 | ldns_rdf * | |
220 | ldns_rr_dnskey_flags(const ldns_rr *r) | |
221 | { | |
222 | return ldns_rr_function(LDNS_RR_TYPE_DNSKEY, r, 0); | |
223 | } | |
224 | ||
225 | bool | |
226 | ldns_rr_dnskey_set_flags(ldns_rr *r, ldns_rdf *f) | |
227 | { | |
228 | return ldns_rr_set_function(LDNS_RR_TYPE_DNSKEY, r, f, 0); | |
229 | } | |
230 | ||
231 | ldns_rdf * | |
232 | ldns_rr_dnskey_protocol(const ldns_rr *r) | |
233 | { | |
234 | return ldns_rr_function(LDNS_RR_TYPE_DNSKEY, r, 1); | |
235 | } | |
236 | ||
237 | bool | |
238 | ldns_rr_dnskey_set_protocol(ldns_rr *r, ldns_rdf *f) | |
239 | { | |
240 | return ldns_rr_set_function(LDNS_RR_TYPE_DNSKEY, r, f, 1); | |
241 | } | |
242 | ||
243 | ldns_rdf * | |
244 | ldns_rr_dnskey_algorithm(const ldns_rr *r) | |
245 | { | |
246 | return ldns_rr_function(LDNS_RR_TYPE_DNSKEY, r, 2); | |
247 | } | |
248 | ||
249 | bool | |
250 | ldns_rr_dnskey_set_algorithm(ldns_rr *r, ldns_rdf *f) | |
251 | { | |
252 | return ldns_rr_set_function(LDNS_RR_TYPE_DNSKEY, r, f, 2); | |
253 | } | |
254 | ||
255 | ldns_rdf * | |
256 | ldns_rr_dnskey_key(const ldns_rr *r) | |
257 | { | |
258 | return ldns_rr_function(LDNS_RR_TYPE_DNSKEY, r, 3); | |
259 | } | |
260 | ||
261 | bool | |
262 | ldns_rr_dnskey_set_key(ldns_rr *r, ldns_rdf *f) | |
263 | { | |
264 | return ldns_rr_set_function(LDNS_RR_TYPE_DNSKEY, r, f, 3); | |
265 | } | |
266 | ||
267 | size_t | |
268 | ldns_rr_dnskey_key_size_raw(const unsigned char* keydata, | |
269 | const size_t len, | |
270 | const ldns_algorithm alg) | |
271 | { | |
272 | /* for DSA keys */ | |
273 | uint8_t t; | |
274 | ||
275 | /* for RSA keys */ | |
276 | uint16_t exp; | |
277 | uint16_t int16; | |
278 | ||
fd185f4d | 279 | switch ((ldns_signing_algorithm)alg) { |
825eb42b JL |
280 | case LDNS_SIGN_DSA: |
281 | case LDNS_SIGN_DSA_NSEC3: | |
282 | if (len > 0) { | |
283 | t = keydata[0]; | |
284 | return (64 + t*8)*8; | |
285 | } else { | |
286 | return 0; | |
287 | } | |
288 | break; | |
289 | case LDNS_SIGN_RSAMD5: | |
290 | case LDNS_SIGN_RSASHA1: | |
291 | case LDNS_SIGN_RSASHA1_NSEC3: | |
292 | #ifdef USE_SHA2 | |
293 | case LDNS_SIGN_RSASHA256: | |
294 | case LDNS_SIGN_RSASHA512: | |
295 | #endif | |
296 | if (len > 0) { | |
297 | if (keydata[0] == 0) { | |
298 | /* big exponent */ | |
299 | if (len > 3) { | |
300 | memmove(&int16, keydata + 1, 2); | |
301 | exp = ntohs(int16); | |
302 | return (len - exp - 3)*8; | |
303 | } else { | |
304 | return 0; | |
305 | } | |
306 | } else { | |
307 | exp = keydata[0]; | |
308 | return (len-exp-1)*8; | |
309 | } | |
310 | } else { | |
311 | return 0; | |
312 | } | |
313 | break; | |
314 | #ifdef USE_GOST | |
ac996e71 | 315 | case LDNS_SIGN_ECC_GOST: |
825eb42b | 316 | return 512; |
ac996e71 JL |
317 | #endif |
318 | #ifdef USE_ECDSA | |
319 | case LDNS_SIGN_ECDSAP256SHA256: | |
320 | return 256; | |
321 | case LDNS_SIGN_ECDSAP384SHA384: | |
322 | return 384; | |
825eb42b JL |
323 | #endif |
324 | case LDNS_SIGN_HMACMD5: | |
325 | return len; | |
825eb42b JL |
326 | default: |
327 | return 0; | |
328 | } | |
329 | } | |
330 | ||
331 | size_t | |
332 | ldns_rr_dnskey_key_size(const ldns_rr *key) | |
333 | { | |
b5dedcca JL |
334 | if (!key || !ldns_rr_dnskey_key(key) |
335 | || !ldns_rr_dnskey_algorithm(key)) { | |
825eb42b JL |
336 | return 0; |
337 | } | |
fd185f4d | 338 | return ldns_rr_dnskey_key_size_raw((unsigned char*)ldns_rdf_data(ldns_rr_dnskey_key(key)), |
825eb42b JL |
339 | ldns_rdf_size(ldns_rr_dnskey_key(key)), |
340 | ldns_rdf2native_int8(ldns_rr_dnskey_algorithm(key)) | |
341 | ); | |
342 | } | |
d1b2b5ca JM |
343 | |
344 | uint32_t ldns_soa_serial_identity(uint32_t ATTR_UNUSED(unused), void *data) | |
345 | { | |
346 | return (uint32_t) (intptr_t) data; | |
347 | } | |
348 | ||
349 | uint32_t ldns_soa_serial_increment(uint32_t s, void *ATTR_UNUSED(unused)) | |
350 | { | |
351 | return ldns_soa_serial_increment_by(s, (void *)1); | |
352 | } | |
353 | ||
354 | uint32_t ldns_soa_serial_increment_by(uint32_t s, void *data) | |
355 | { | |
356 | return s + (intptr_t) data; | |
357 | } | |
358 | ||
359 | uint32_t ldns_soa_serial_datecounter(uint32_t s, void *data) | |
360 | { | |
361 | struct tm tm; | |
362 | char s_str[11]; | |
363 | int32_t new_s; | |
364 | time_t t = data ? (time_t) (intptr_t) data : ldns_time(NULL); | |
365 | ||
366 | (void) strftime(s_str, 11, "%Y%m%d00", localtime_r(&t, &tm)); | |
367 | new_s = (int32_t) atoi(s_str); | |
368 | return new_s - ((int32_t) s) <= 0 ? s+1 : ((uint32_t) new_s); | |
369 | } | |
370 | ||
371 | uint32_t ldns_soa_serial_unixtime(uint32_t s, void *data) | |
372 | { | |
373 | int32_t new_s = data ? (int32_t) (intptr_t) data | |
374 | : (int32_t) ldns_time(NULL); | |
375 | return new_s - ((int32_t) s) <= 0 ? s+1 : ((uint32_t) new_s); | |
376 | } | |
377 | ||
378 | void | |
379 | ldns_rr_soa_increment(ldns_rr *soa) | |
380 | { | |
381 | ldns_rr_soa_increment_func_data(soa, ldns_soa_serial_increment, NULL); | |
382 | } | |
383 | ||
384 | void | |
385 | ldns_rr_soa_increment_func(ldns_rr *soa, ldns_soa_serial_increment_func_t f) | |
386 | { | |
387 | ldns_rr_soa_increment_func_data(soa, f, NULL); | |
388 | } | |
389 | ||
390 | void | |
391 | ldns_rr_soa_increment_func_data(ldns_rr *soa, | |
392 | ldns_soa_serial_increment_func_t f, void *data) | |
393 | { | |
394 | ldns_rdf *prev_soa_serial_rdf; | |
395 | if ( !soa || !f || ldns_rr_get_type(soa) != LDNS_RR_TYPE_SOA | |
396 | || !ldns_rr_rdf(soa, 2)) { | |
397 | return; | |
398 | } | |
399 | prev_soa_serial_rdf = ldns_rr_set_rdf( | |
400 | soa | |
401 | , ldns_native2rdf_int32( | |
402 | LDNS_RDF_TYPE_INT32 | |
403 | , (*f)( ldns_rdf2native_int32( | |
404 | ldns_rr_rdf(soa, 2)) | |
405 | , data | |
406 | ) | |
407 | ) | |
408 | , 2 | |
409 | ); | |
410 | LDNS_FREE(prev_soa_serial_rdf); | |
411 | } | |
412 | ||
413 | void | |
414 | ldns_rr_soa_increment_func_int(ldns_rr *soa, | |
415 | ldns_soa_serial_increment_func_t f, int data) | |
416 | { | |
417 | ldns_rr_soa_increment_func_data(soa, f, (void *) (intptr_t) data); | |
418 | } | |
419 |