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74b2466e LP |
1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2014 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
9 | under the terms of the GNU Lesser General Public License as published by | |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | Lesser General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU Lesser General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
0dae31d4 ZJS |
22 | #include <math.h> |
23 | ||
b5efdb8a | 24 | #include "alloc-util.h" |
4ad7f276 | 25 | #include "dns-domain.h" |
7263f724 | 26 | #include "dns-type.h" |
e4e73a63 | 27 | #include "hexdecoct.h" |
07630cea | 28 | #include "resolved-dns-packet.h" |
e4e73a63 | 29 | #include "resolved-dns-rr.h" |
8730bccf | 30 | #include "string-table.h" |
07630cea LP |
31 | #include "string-util.h" |
32 | #include "strv.h" | |
74b2466e | 33 | |
faa133f3 LP |
34 | DnsResourceKey* dns_resource_key_new(uint16_t class, uint16_t type, const char *name) { |
35 | DnsResourceKey *k; | |
36 | size_t l; | |
74b2466e | 37 | |
faa133f3 LP |
38 | assert(name); |
39 | ||
40 | l = strlen(name); | |
41 | k = malloc0(sizeof(DnsResourceKey) + l + 1); | |
42 | if (!k) | |
43 | return NULL; | |
44 | ||
45 | k->n_ref = 1; | |
46 | k->class = class; | |
47 | k->type = type; | |
48 | ||
49 | strcpy((char*) k + sizeof(DnsResourceKey), name); | |
50 | ||
51 | return k; | |
52 | } | |
53 | ||
36d9205d | 54 | DnsResourceKey* dns_resource_key_new_redirect(const DnsResourceKey *key, const DnsResourceRecord *cname) { |
58db254a LP |
55 | int r; |
56 | ||
36d9205d TG |
57 | assert(key); |
58 | assert(cname); | |
59 | ||
58db254a LP |
60 | assert(IN_SET(cname->key->type, DNS_TYPE_CNAME, DNS_TYPE_DNAME)); |
61 | ||
62 | if (cname->key->type == DNS_TYPE_CNAME) | |
63 | return dns_resource_key_new(key->class, key->type, cname->cname.name); | |
64 | else { | |
65 | DnsResourceKey *k; | |
66 | char *destination = NULL; | |
67 | ||
68 | r = dns_name_change_suffix(DNS_RESOURCE_KEY_NAME(key), DNS_RESOURCE_KEY_NAME(cname->key), cname->dname.name, &destination); | |
69 | if (r < 0) | |
70 | return NULL; | |
71 | if (r == 0) | |
72 | return dns_resource_key_ref((DnsResourceKey*) key); | |
73 | ||
74 | k = dns_resource_key_new_consume(key->class, key->type, destination); | |
75 | if (!k) { | |
76 | free(destination); | |
77 | return NULL; | |
78 | } | |
79 | ||
80 | return k; | |
81 | } | |
36d9205d TG |
82 | } |
83 | ||
801ad6a6 LP |
84 | int dns_resource_key_new_append_suffix(DnsResourceKey **ret, DnsResourceKey *key, char *name) { |
85 | DnsResourceKey *new_key; | |
86 | char *joined; | |
87 | int r; | |
88 | ||
89 | assert(ret); | |
90 | assert(key); | |
91 | assert(name); | |
92 | ||
dc477e73 | 93 | if (dns_name_is_root(name)) { |
801ad6a6 LP |
94 | *ret = dns_resource_key_ref(key); |
95 | return 0; | |
96 | } | |
97 | ||
98 | r = dns_name_concat(DNS_RESOURCE_KEY_NAME(key), name, &joined); | |
99 | if (r < 0) | |
100 | return r; | |
101 | ||
102 | new_key = dns_resource_key_new_consume(key->class, key->type, joined); | |
103 | if (!new_key) { | |
104 | free(joined); | |
105 | return -ENOMEM; | |
106 | } | |
107 | ||
108 | *ret = new_key; | |
109 | return 0; | |
110 | } | |
111 | ||
faa133f3 LP |
112 | DnsResourceKey* dns_resource_key_new_consume(uint16_t class, uint16_t type, char *name) { |
113 | DnsResourceKey *k; | |
114 | ||
115 | assert(name); | |
116 | ||
117 | k = new0(DnsResourceKey, 1); | |
118 | if (!k) | |
119 | return NULL; | |
120 | ||
121 | k->n_ref = 1; | |
122 | k->class = class; | |
123 | k->type = type; | |
124 | k->_name = name; | |
125 | ||
126 | return k; | |
127 | } | |
128 | ||
129 | DnsResourceKey* dns_resource_key_ref(DnsResourceKey *k) { | |
130 | ||
131 | if (!k) | |
132 | return NULL; | |
133 | ||
1b4f6e79 LP |
134 | /* Static/const keys created with DNS_RESOURCE_KEY_CONST will |
135 | * set this to -1, they should not be reffed/unreffed */ | |
136 | assert(k->n_ref != (unsigned) -1); | |
137 | ||
faa133f3 LP |
138 | assert(k->n_ref > 0); |
139 | k->n_ref++; | |
140 | ||
141 | return k; | |
142 | } | |
143 | ||
144 | DnsResourceKey* dns_resource_key_unref(DnsResourceKey *k) { | |
145 | if (!k) | |
146 | return NULL; | |
147 | ||
1b4f6e79 | 148 | assert(k->n_ref != (unsigned) -1); |
faa133f3 LP |
149 | assert(k->n_ref > 0); |
150 | ||
151 | if (k->n_ref == 1) { | |
152 | free(k->_name); | |
153 | free(k); | |
154 | } else | |
155 | k->n_ref--; | |
156 | ||
157 | return NULL; | |
158 | } | |
159 | ||
28b9b764 LP |
160 | bool dns_resource_key_is_address(const DnsResourceKey *key) { |
161 | assert(key); | |
162 | ||
163 | /* Check if this is an A or AAAA resource key */ | |
164 | ||
165 | return key->class == DNS_CLASS_IN && IN_SET(key->type, DNS_TYPE_A, DNS_TYPE_AAAA); | |
166 | } | |
167 | ||
faa133f3 LP |
168 | int dns_resource_key_equal(const DnsResourceKey *a, const DnsResourceKey *b) { |
169 | int r; | |
170 | ||
4d247a6c LP |
171 | if (a == b) |
172 | return 1; | |
173 | ||
faa133f3 LP |
174 | r = dns_name_equal(DNS_RESOURCE_KEY_NAME(a), DNS_RESOURCE_KEY_NAME(b)); |
175 | if (r <= 0) | |
176 | return r; | |
177 | ||
178 | if (a->class != b->class) | |
179 | return 0; | |
180 | ||
181 | if (a->type != b->type) | |
182 | return 0; | |
183 | ||
184 | return 1; | |
185 | } | |
186 | ||
105e1512 | 187 | int dns_resource_key_match_rr(const DnsResourceKey *key, DnsResourceRecord *rr, const char *search_domain) { |
801ad6a6 LP |
188 | int r; |
189 | ||
faa133f3 LP |
190 | assert(key); |
191 | assert(rr); | |
192 | ||
4d247a6c LP |
193 | if (key == rr->key) |
194 | return 1; | |
195 | ||
801ad6a6 LP |
196 | /* Checks if an rr matches the specified key. If a search |
197 | * domain is specified, it will also be checked if the key | |
198 | * with the search domain suffixed might match the RR. */ | |
199 | ||
faa133f3 LP |
200 | if (rr->key->class != key->class && key->class != DNS_CLASS_ANY) |
201 | return 0; | |
202 | ||
203 | if (rr->key->type != key->type && key->type != DNS_TYPE_ANY) | |
204 | return 0; | |
205 | ||
801ad6a6 LP |
206 | r = dns_name_equal(DNS_RESOURCE_KEY_NAME(rr->key), DNS_RESOURCE_KEY_NAME(key)); |
207 | if (r != 0) | |
208 | return r; | |
209 | ||
210 | if (search_domain) { | |
211 | _cleanup_free_ char *joined = NULL; | |
212 | ||
213 | r = dns_name_concat(DNS_RESOURCE_KEY_NAME(key), search_domain, &joined); | |
214 | if (r < 0) | |
215 | return r; | |
216 | ||
217 | return dns_name_equal(DNS_RESOURCE_KEY_NAME(rr->key), joined); | |
218 | } | |
219 | ||
220 | return 0; | |
faa133f3 LP |
221 | } |
222 | ||
5d27351f | 223 | int dns_resource_key_match_cname_or_dname(const DnsResourceKey *key, const DnsResourceKey *cname, const char *search_domain) { |
801ad6a6 LP |
224 | int r; |
225 | ||
faa133f3 | 226 | assert(key); |
5d27351f | 227 | assert(cname); |
faa133f3 | 228 | |
5d27351f | 229 | if (cname->class != key->class && key->class != DNS_CLASS_ANY) |
faa133f3 LP |
230 | return 0; |
231 | ||
5d27351f TG |
232 | if (cname->type == DNS_TYPE_CNAME) |
233 | r = dns_name_equal(DNS_RESOURCE_KEY_NAME(key), DNS_RESOURCE_KEY_NAME(cname)); | |
234 | else if (cname->type == DNS_TYPE_DNAME) | |
235 | r = dns_name_endswith(DNS_RESOURCE_KEY_NAME(key), DNS_RESOURCE_KEY_NAME(cname)); | |
58db254a | 236 | else |
faa133f3 | 237 | return 0; |
801ad6a6 LP |
238 | |
239 | if (r != 0) | |
240 | return r; | |
241 | ||
242 | if (search_domain) { | |
243 | _cleanup_free_ char *joined = NULL; | |
244 | ||
245 | r = dns_name_concat(DNS_RESOURCE_KEY_NAME(key), search_domain, &joined); | |
246 | if (r < 0) | |
247 | return r; | |
248 | ||
5d27351f TG |
249 | if (cname->type == DNS_TYPE_CNAME) |
250 | return dns_name_equal(joined, DNS_RESOURCE_KEY_NAME(cname)); | |
251 | else if (cname->type == DNS_TYPE_DNAME) | |
252 | return dns_name_endswith(joined, DNS_RESOURCE_KEY_NAME(cname)); | |
801ad6a6 LP |
253 | } |
254 | ||
255 | return 0; | |
547973de LP |
256 | } |
257 | ||
258 | int dns_resource_key_match_soa(const DnsResourceKey *key, const DnsResourceKey *soa) { | |
259 | assert(soa); | |
260 | assert(key); | |
261 | ||
262 | /* Checks whether 'soa' is a SOA record for the specified key. */ | |
263 | ||
65b200e7 | 264 | if (soa->class != key->class) |
547973de | 265 | return 0; |
801ad6a6 | 266 | |
547973de LP |
267 | if (soa->type != DNS_TYPE_SOA) |
268 | return 0; | |
269 | ||
0936416a | 270 | return dns_name_endswith(DNS_RESOURCE_KEY_NAME(key), DNS_RESOURCE_KEY_NAME(soa)); |
74b2466e LP |
271 | } |
272 | ||
b826ab58 | 273 | static void dns_resource_key_hash_func(const void *i, struct siphash *state) { |
322345fd | 274 | const DnsResourceKey *k = i; |
322345fd | 275 | |
b826ab58 | 276 | assert(k); |
322345fd | 277 | |
b826ab58 TG |
278 | dns_name_hash_func(DNS_RESOURCE_KEY_NAME(k), state); |
279 | siphash24_compress(&k->class, sizeof(k->class), state); | |
280 | siphash24_compress(&k->type, sizeof(k->type), state); | |
322345fd LP |
281 | } |
282 | ||
d5099efc | 283 | static int dns_resource_key_compare_func(const void *a, const void *b) { |
322345fd LP |
284 | const DnsResourceKey *x = a, *y = b; |
285 | int ret; | |
286 | ||
faa133f3 | 287 | ret = dns_name_compare_func(DNS_RESOURCE_KEY_NAME(x), DNS_RESOURCE_KEY_NAME(y)); |
322345fd LP |
288 | if (ret != 0) |
289 | return ret; | |
290 | ||
291 | if (x->type < y->type) | |
292 | return -1; | |
293 | if (x->type > y->type) | |
294 | return 1; | |
295 | ||
296 | if (x->class < y->class) | |
297 | return -1; | |
298 | if (x->class > y->class) | |
299 | return 1; | |
300 | ||
301 | return 0; | |
302 | } | |
303 | ||
d5099efc MS |
304 | const struct hash_ops dns_resource_key_hash_ops = { |
305 | .hash = dns_resource_key_hash_func, | |
306 | .compare = dns_resource_key_compare_func | |
307 | }; | |
308 | ||
2d4c5cbc | 309 | int dns_resource_key_to_string(const DnsResourceKey *key, char **ret) { |
d23a27a9 | 310 | char cbuf[strlen("CLASS") + DECIMAL_STR_MAX(uint16_t)], tbuf[strlen("TYPE") + DECIMAL_STR_MAX(uint16_t)]; |
f2af5ea3 | 311 | const char *c, *t, *n; |
2d4c5cbc LP |
312 | char *s; |
313 | ||
6af47493 LP |
314 | /* If we cannot convert the CLASS/TYPE into a known string, |
315 | use the format recommended by RFC 3597, Section 5. */ | |
316 | ||
2d4c5cbc LP |
317 | c = dns_class_to_string(key->class); |
318 | if (!c) { | |
d23a27a9 | 319 | sprintf(cbuf, "CLASS%u", key->class); |
2d4c5cbc LP |
320 | c = cbuf; |
321 | } | |
322 | ||
323 | t = dns_type_to_string(key->type); | |
324 | if (!t){ | |
d23a27a9 | 325 | sprintf(tbuf, "TYPE%u", key->type); |
2d4c5cbc LP |
326 | t = tbuf; |
327 | } | |
328 | ||
f2af5ea3 LP |
329 | n = DNS_RESOURCE_KEY_NAME(key); |
330 | if (asprintf(&s, "%s%s %s %-5s", n, endswith(n, ".") ? "" : ".", c, t) < 0) | |
2d4c5cbc LP |
331 | return -ENOMEM; |
332 | ||
333 | *ret = s; | |
334 | return 0; | |
335 | } | |
336 | ||
faa133f3 | 337 | DnsResourceRecord* dns_resource_record_new(DnsResourceKey *key) { |
74b2466e LP |
338 | DnsResourceRecord *rr; |
339 | ||
340 | rr = new0(DnsResourceRecord, 1); | |
341 | if (!rr) | |
342 | return NULL; | |
343 | ||
344 | rr->n_ref = 1; | |
faa133f3 | 345 | rr->key = dns_resource_key_ref(key); |
ee3d6aff | 346 | rr->expiry = USEC_INFINITY; |
97c67192 | 347 | rr->n_skip_labels_signer = rr->n_skip_labels_source = (unsigned) -1; |
faa133f3 | 348 | |
74b2466e LP |
349 | return rr; |
350 | } | |
351 | ||
8bf52d3d LP |
352 | DnsResourceRecord* dns_resource_record_new_full(uint16_t class, uint16_t type, const char *name) { |
353 | _cleanup_(dns_resource_key_unrefp) DnsResourceKey *key = NULL; | |
354 | ||
355 | key = dns_resource_key_new(class, type, name); | |
356 | if (!key) | |
357 | return NULL; | |
358 | ||
359 | return dns_resource_record_new(key); | |
360 | } | |
361 | ||
74b2466e LP |
362 | DnsResourceRecord* dns_resource_record_ref(DnsResourceRecord *rr) { |
363 | if (!rr) | |
364 | return NULL; | |
365 | ||
366 | assert(rr->n_ref > 0); | |
367 | rr->n_ref++; | |
368 | ||
369 | return rr; | |
370 | } | |
371 | ||
372 | DnsResourceRecord* dns_resource_record_unref(DnsResourceRecord *rr) { | |
373 | if (!rr) | |
374 | return NULL; | |
375 | ||
376 | assert(rr->n_ref > 0); | |
377 | ||
378 | if (rr->n_ref > 1) { | |
379 | rr->n_ref--; | |
380 | return NULL; | |
381 | } | |
382 | ||
faa133f3 | 383 | if (rr->key) { |
9de3e329 | 384 | switch(rr->key->type) { |
9c92ce6d LP |
385 | |
386 | case DNS_TYPE_SRV: | |
387 | free(rr->srv.name); | |
388 | break; | |
389 | ||
9de3e329 ZJS |
390 | case DNS_TYPE_PTR: |
391 | case DNS_TYPE_NS: | |
392 | case DNS_TYPE_CNAME: | |
8ac4e9e1 | 393 | case DNS_TYPE_DNAME: |
faa133f3 | 394 | free(rr->ptr.name); |
9de3e329 | 395 | break; |
9c92ce6d | 396 | |
9de3e329 | 397 | case DNS_TYPE_HINFO: |
faa133f3 LP |
398 | free(rr->hinfo.cpu); |
399 | free(rr->hinfo.os); | |
9de3e329 | 400 | break; |
9c92ce6d | 401 | |
9de3e329 | 402 | case DNS_TYPE_TXT: |
9c92ce6d | 403 | case DNS_TYPE_SPF: |
2001c805 | 404 | dns_txt_item_free_all(rr->txt.items); |
9de3e329 | 405 | break; |
9c92ce6d | 406 | |
9de3e329 | 407 | case DNS_TYPE_SOA: |
7e8e0422 LP |
408 | free(rr->soa.mname); |
409 | free(rr->soa.rname); | |
9de3e329 | 410 | break; |
9c92ce6d | 411 | |
9de3e329 | 412 | case DNS_TYPE_MX: |
946c7094 | 413 | free(rr->mx.exchange); |
9de3e329 | 414 | break; |
9c92ce6d | 415 | |
abf126a3 TG |
416 | case DNS_TYPE_DS: |
417 | free(rr->ds.digest); | |
418 | break; | |
419 | ||
42cc2eeb | 420 | case DNS_TYPE_SSHFP: |
549c1a25 | 421 | free(rr->sshfp.fingerprint); |
42cc2eeb LP |
422 | break; |
423 | ||
8db0d2f5 ZJS |
424 | case DNS_TYPE_DNSKEY: |
425 | free(rr->dnskey.key); | |
426 | break; | |
427 | ||
151226ab ZJS |
428 | case DNS_TYPE_RRSIG: |
429 | free(rr->rrsig.signer); | |
430 | free(rr->rrsig.signature); | |
431 | break; | |
432 | ||
50f1e641 TG |
433 | case DNS_TYPE_NSEC: |
434 | free(rr->nsec.next_domain_name); | |
435 | bitmap_free(rr->nsec.types); | |
436 | break; | |
437 | ||
5d45a880 TG |
438 | case DNS_TYPE_NSEC3: |
439 | free(rr->nsec3.next_hashed_name); | |
440 | free(rr->nsec3.salt); | |
441 | bitmap_free(rr->nsec3.types); | |
442 | break; | |
443 | ||
0dae31d4 | 444 | case DNS_TYPE_LOC: |
9de3e329 ZJS |
445 | case DNS_TYPE_A: |
446 | case DNS_TYPE_AAAA: | |
447 | break; | |
9c92ce6d | 448 | |
9de3e329 | 449 | default: |
faa133f3 | 450 | free(rr->generic.data); |
9de3e329 | 451 | } |
322345fd | 452 | |
a8812dd7 | 453 | free(rr->wire_format); |
faa133f3 LP |
454 | dns_resource_key_unref(rr->key); |
455 | } | |
322345fd | 456 | |
7b50eb2e | 457 | free(rr->to_string); |
faa133f3 | 458 | free(rr); |
322345fd | 459 | |
322345fd LP |
460 | return NULL; |
461 | } | |
462 | ||
623a4c97 LP |
463 | int dns_resource_record_new_reverse(DnsResourceRecord **ret, int family, const union in_addr_union *address, const char *hostname) { |
464 | _cleanup_(dns_resource_key_unrefp) DnsResourceKey *key = NULL; | |
465 | _cleanup_(dns_resource_record_unrefp) DnsResourceRecord *rr = NULL; | |
466 | _cleanup_free_ char *ptr = NULL; | |
467 | int r; | |
468 | ||
469 | assert(ret); | |
470 | assert(address); | |
471 | assert(hostname); | |
472 | ||
473 | r = dns_name_reverse(family, address, &ptr); | |
474 | if (r < 0) | |
475 | return r; | |
476 | ||
477 | key = dns_resource_key_new_consume(DNS_CLASS_IN, DNS_TYPE_PTR, ptr); | |
478 | if (!key) | |
479 | return -ENOMEM; | |
480 | ||
481 | ptr = NULL; | |
482 | ||
483 | rr = dns_resource_record_new(key); | |
484 | if (!rr) | |
485 | return -ENOMEM; | |
486 | ||
487 | rr->ptr.name = strdup(hostname); | |
488 | if (!rr->ptr.name) | |
489 | return -ENOMEM; | |
490 | ||
491 | *ret = rr; | |
492 | rr = NULL; | |
493 | ||
494 | return 0; | |
495 | } | |
496 | ||
78c6a153 LP |
497 | int dns_resource_record_new_address(DnsResourceRecord **ret, int family, const union in_addr_union *address, const char *name) { |
498 | DnsResourceRecord *rr; | |
499 | ||
500 | assert(ret); | |
501 | assert(address); | |
502 | assert(family); | |
503 | ||
504 | if (family == AF_INET) { | |
505 | ||
506 | rr = dns_resource_record_new_full(DNS_CLASS_IN, DNS_TYPE_A, name); | |
507 | if (!rr) | |
508 | return -ENOMEM; | |
509 | ||
510 | rr->a.in_addr = address->in; | |
511 | ||
512 | } else if (family == AF_INET6) { | |
513 | ||
514 | rr = dns_resource_record_new_full(DNS_CLASS_IN, DNS_TYPE_AAAA, name); | |
515 | if (!rr) | |
516 | return -ENOMEM; | |
517 | ||
518 | rr->aaaa.in6_addr = address->in6; | |
519 | } else | |
520 | return -EAFNOSUPPORT; | |
521 | ||
522 | *ret = rr; | |
523 | ||
524 | return 0; | |
525 | } | |
526 | ||
322345fd LP |
527 | int dns_resource_record_equal(const DnsResourceRecord *a, const DnsResourceRecord *b) { |
528 | int r; | |
529 | ||
530 | assert(a); | |
531 | assert(b); | |
532 | ||
4d247a6c LP |
533 | if (a == b) |
534 | return 1; | |
535 | ||
faa133f3 | 536 | r = dns_resource_key_equal(a->key, b->key); |
322345fd LP |
537 | if (r <= 0) |
538 | return r; | |
539 | ||
fd0b4602 LP |
540 | if (a->unparseable != b->unparseable) |
541 | return 0; | |
542 | ||
543 | switch (a->unparseable ? _DNS_TYPE_INVALID : a->key->type) { | |
2d4c5cbc | 544 | |
9c92ce6d LP |
545 | case DNS_TYPE_SRV: |
546 | r = dns_name_equal(a->srv.name, b->srv.name); | |
547 | if (r <= 0) | |
548 | return r; | |
549 | ||
550 | return a->srv.priority == b->srv.priority && | |
551 | a->srv.weight == b->srv.weight && | |
552 | a->srv.port == b->srv.port; | |
553 | ||
2d4c5cbc LP |
554 | case DNS_TYPE_PTR: |
555 | case DNS_TYPE_NS: | |
556 | case DNS_TYPE_CNAME: | |
8ac4e9e1 | 557 | case DNS_TYPE_DNAME: |
322345fd | 558 | return dns_name_equal(a->ptr.name, b->ptr.name); |
2d4c5cbc LP |
559 | |
560 | case DNS_TYPE_HINFO: | |
561 | return strcaseeq(a->hinfo.cpu, b->hinfo.cpu) && | |
562 | strcaseeq(a->hinfo.os, b->hinfo.os); | |
563 | ||
9de3e329 | 564 | case DNS_TYPE_SPF: /* exactly the same as TXT */ |
0f84a72e | 565 | case DNS_TYPE_TXT: |
2001c805 | 566 | return dns_txt_item_equal(a->txt.items, b->txt.items); |
2e276efc | 567 | |
2d4c5cbc | 568 | case DNS_TYPE_A: |
322345fd | 569 | return memcmp(&a->a.in_addr, &b->a.in_addr, sizeof(struct in_addr)) == 0; |
2d4c5cbc LP |
570 | |
571 | case DNS_TYPE_AAAA: | |
322345fd | 572 | return memcmp(&a->aaaa.in6_addr, &b->aaaa.in6_addr, sizeof(struct in6_addr)) == 0; |
2d4c5cbc LP |
573 | |
574 | case DNS_TYPE_SOA: | |
7e8e0422 LP |
575 | r = dns_name_equal(a->soa.mname, b->soa.mname); |
576 | if (r <= 0) | |
577 | return r; | |
578 | r = dns_name_equal(a->soa.rname, b->soa.rname); | |
579 | if (r <= 0) | |
580 | return r; | |
581 | ||
582 | return a->soa.serial == b->soa.serial && | |
583 | a->soa.refresh == b->soa.refresh && | |
584 | a->soa.retry == b->soa.retry && | |
585 | a->soa.expire == b->soa.expire && | |
586 | a->soa.minimum == b->soa.minimum; | |
9c92ce6d | 587 | |
946c7094 ZJS |
588 | case DNS_TYPE_MX: |
589 | if (a->mx.priority != b->mx.priority) | |
590 | return 0; | |
591 | ||
592 | return dns_name_equal(a->mx.exchange, b->mx.exchange); | |
593 | ||
0dae31d4 ZJS |
594 | case DNS_TYPE_LOC: |
595 | assert(a->loc.version == b->loc.version); | |
596 | ||
597 | return a->loc.size == b->loc.size && | |
598 | a->loc.horiz_pre == b->loc.horiz_pre && | |
599 | a->loc.vert_pre == b->loc.vert_pre && | |
600 | a->loc.latitude == b->loc.latitude && | |
601 | a->loc.longitude == b->loc.longitude && | |
602 | a->loc.altitude == b->loc.altitude; | |
603 | ||
abf126a3 TG |
604 | case DNS_TYPE_DS: |
605 | return a->ds.key_tag == b->ds.key_tag && | |
606 | a->ds.algorithm == b->ds.algorithm && | |
607 | a->ds.digest_type == b->ds.digest_type && | |
608 | a->ds.digest_size == b->ds.digest_size && | |
609 | memcmp(a->ds.digest, b->ds.digest, a->ds.digest_size) == 0; | |
610 | ||
42cc2eeb LP |
611 | case DNS_TYPE_SSHFP: |
612 | return a->sshfp.algorithm == b->sshfp.algorithm && | |
613 | a->sshfp.fptype == b->sshfp.fptype && | |
549c1a25 TG |
614 | a->sshfp.fingerprint_size == b->sshfp.fingerprint_size && |
615 | memcmp(a->sshfp.fingerprint, b->sshfp.fingerprint, a->sshfp.fingerprint_size) == 0; | |
42cc2eeb | 616 | |
8db0d2f5 | 617 | case DNS_TYPE_DNSKEY: |
f91dc240 LP |
618 | return a->dnskey.flags == b->dnskey.flags && |
619 | a->dnskey.protocol == b->dnskey.protocol && | |
8db0d2f5 ZJS |
620 | a->dnskey.algorithm == b->dnskey.algorithm && |
621 | a->dnskey.key_size == b->dnskey.key_size && | |
622 | memcmp(a->dnskey.key, b->dnskey.key, a->dnskey.key_size) == 0; | |
623 | ||
151226ab ZJS |
624 | case DNS_TYPE_RRSIG: |
625 | /* do the fast comparisons first */ | |
03664a62 LN |
626 | if (a->rrsig.type_covered != b->rrsig.type_covered || |
627 | a->rrsig.algorithm != b->rrsig.algorithm || | |
628 | a->rrsig.labels != b->rrsig.labels || | |
629 | a->rrsig.original_ttl != b->rrsig.original_ttl || | |
630 | a->rrsig.expiration != b->rrsig.expiration || | |
631 | a->rrsig.inception != b->rrsig.inception || | |
632 | a->rrsig.key_tag != b->rrsig.key_tag || | |
151226ab ZJS |
633 | a->rrsig.signature_size != b->rrsig.signature_size || |
634 | memcmp(a->rrsig.signature, b->rrsig.signature, a->rrsig.signature_size) != 0) | |
635 | return false; | |
636 | ||
637 | return dns_name_equal(a->rrsig.signer, b->rrsig.signer); | |
638 | ||
50f1e641 TG |
639 | case DNS_TYPE_NSEC: |
640 | return dns_name_equal(a->nsec.next_domain_name, b->nsec.next_domain_name) && | |
641 | bitmap_equal(a->nsec.types, b->nsec.types); | |
642 | ||
5d45a880 TG |
643 | case DNS_TYPE_NSEC3: |
644 | return a->nsec3.algorithm == b->nsec3.algorithm && | |
645 | a->nsec3.flags == b->nsec3.flags && | |
646 | a->nsec3.iterations == b->nsec3.iterations && | |
647 | a->nsec3.salt_size == b->nsec3.salt_size && | |
648 | memcmp(a->nsec3.salt, b->nsec3.salt, a->nsec3.salt_size) == 0 && | |
649 | memcmp(a->nsec3.next_hashed_name, b->nsec3.next_hashed_name, a->nsec3.next_hashed_name_size) == 0 && | |
650 | bitmap_equal(a->nsec3.types, b->nsec3.types); | |
651 | ||
2d4c5cbc | 652 | default: |
322345fd LP |
653 | return a->generic.size == b->generic.size && |
654 | memcmp(a->generic.data, b->generic.data, a->generic.size) == 0; | |
2d4c5cbc | 655 | } |
322345fd LP |
656 | } |
657 | ||
0dae31d4 ZJS |
658 | static char* format_location(uint32_t latitude, uint32_t longitude, uint32_t altitude, |
659 | uint8_t size, uint8_t horiz_pre, uint8_t vert_pre) { | |
660 | char *s; | |
661 | char NS = latitude >= 1U<<31 ? 'N' : 'S'; | |
662 | char EW = longitude >= 1U<<31 ? 'E' : 'W'; | |
663 | ||
664 | int lat = latitude >= 1U<<31 ? (int) (latitude - (1U<<31)) : (int) ((1U<<31) - latitude); | |
665 | int lon = longitude >= 1U<<31 ? (int) (longitude - (1U<<31)) : (int) ((1U<<31) - longitude); | |
666 | double alt = altitude >= 10000000u ? altitude - 10000000u : -(double)(10000000u - altitude); | |
667 | double siz = (size >> 4) * exp10((double) (size & 0xF)); | |
668 | double hor = (horiz_pre >> 4) * exp10((double) (horiz_pre & 0xF)); | |
669 | double ver = (vert_pre >> 4) * exp10((double) (vert_pre & 0xF)); | |
670 | ||
671 | if (asprintf(&s, "%d %d %.3f %c %d %d %.3f %c %.2fm %.2fm %.2fm %.2fm", | |
672 | (lat / 60000 / 60), | |
673 | (lat / 60000) % 60, | |
674 | (lat % 60000) / 1000., | |
675 | NS, | |
676 | (lon / 60000 / 60), | |
677 | (lon / 60000) % 60, | |
678 | (lon % 60000) / 1000., | |
679 | EW, | |
680 | alt / 100., | |
681 | siz / 100., | |
682 | hor / 100., | |
683 | ver / 100.) < 0) | |
684 | return NULL; | |
685 | ||
686 | return s; | |
687 | } | |
688 | ||
7c6423e1 TG |
689 | static int format_timestamp_dns(char *buf, size_t l, time_t sec) { |
690 | struct tm tm; | |
691 | ||
692 | assert(buf); | |
693 | assert(l > strlen("YYYYMMDDHHmmSS")); | |
694 | ||
695 | if (!gmtime_r(&sec, &tm)) | |
696 | return -EINVAL; | |
697 | ||
698 | if (strftime(buf, l, "%Y%m%d%H%M%S", &tm) <= 0) | |
699 | return -EINVAL; | |
700 | ||
701 | return 0; | |
702 | } | |
703 | ||
50f1e641 TG |
704 | static char *format_types(Bitmap *types) { |
705 | _cleanup_strv_free_ char **strv = NULL; | |
706 | _cleanup_free_ char *str = NULL; | |
cb57dd41 | 707 | Iterator i; |
50f1e641 TG |
708 | unsigned type; |
709 | int r; | |
710 | ||
cb57dd41 | 711 | BITMAP_FOREACH(type, types, i) { |
50f1e641 | 712 | if (dns_type_to_string(type)) { |
2c1fb4f7 | 713 | r = strv_extend(&strv, dns_type_to_string(type)); |
50f1e641 TG |
714 | if (r < 0) |
715 | return NULL; | |
716 | } else { | |
717 | char *t; | |
718 | ||
719 | r = asprintf(&t, "TYPE%u", type); | |
720 | if (r < 0) | |
721 | return NULL; | |
722 | ||
2c1fb4f7 | 723 | r = strv_consume(&strv, t); |
50f1e641 TG |
724 | if (r < 0) |
725 | return NULL; | |
726 | } | |
727 | } | |
728 | ||
729 | str = strv_join(strv, " "); | |
730 | if (!str) | |
731 | return NULL; | |
732 | ||
733 | return strjoin("( ", str, " )", NULL); | |
734 | } | |
735 | ||
2001c805 LP |
736 | static char *format_txt(DnsTxtItem *first) { |
737 | DnsTxtItem *i; | |
738 | size_t c = 1; | |
739 | char *p, *s; | |
740 | ||
741 | LIST_FOREACH(items, i, first) | |
742 | c += i->length * 4 + 3; | |
743 | ||
744 | p = s = new(char, c); | |
745 | if (!s) | |
746 | return NULL; | |
747 | ||
748 | LIST_FOREACH(items, i, first) { | |
749 | size_t j; | |
750 | ||
751 | if (i != first) | |
752 | *(p++) = ' '; | |
753 | ||
754 | *(p++) = '"'; | |
755 | ||
756 | for (j = 0; j < i->length; j++) { | |
757 | if (i->data[j] < ' ' || i->data[j] == '"' || i->data[j] >= 127) { | |
758 | *(p++) = '\\'; | |
759 | *(p++) = '0' + (i->data[j] / 100); | |
760 | *(p++) = '0' + ((i->data[j] / 10) % 10); | |
761 | *(p++) = '0' + (i->data[j] % 10); | |
762 | } else | |
763 | *(p++) = i->data[j]; | |
764 | } | |
765 | ||
766 | *(p++) = '"'; | |
767 | } | |
768 | ||
769 | *p = 0; | |
770 | return s; | |
771 | } | |
772 | ||
7b50eb2e | 773 | const char *dns_resource_record_to_string(DnsResourceRecord *rr) { |
8db0d2f5 | 774 | _cleanup_free_ char *k = NULL, *t = NULL; |
2d4c5cbc LP |
775 | char *s; |
776 | int r; | |
322345fd | 777 | |
2d4c5cbc | 778 | assert(rr); |
322345fd | 779 | |
7b50eb2e LP |
780 | if (rr->to_string) |
781 | return rr->to_string; | |
782 | ||
2d4c5cbc LP |
783 | r = dns_resource_key_to_string(rr->key, &k); |
784 | if (r < 0) | |
7b50eb2e | 785 | return NULL; |
322345fd | 786 | |
0dae31d4 | 787 | switch (rr->unparseable ? _DNS_TYPE_INVALID : rr->key->type) { |
322345fd | 788 | |
9c92ce6d LP |
789 | case DNS_TYPE_SRV: |
790 | r = asprintf(&s, "%s %u %u %u %s", | |
791 | k, | |
792 | rr->srv.priority, | |
793 | rr->srv.weight, | |
794 | rr->srv.port, | |
795 | strna(rr->srv.name)); | |
796 | if (r < 0) | |
7b50eb2e | 797 | return NULL; |
9c92ce6d LP |
798 | break; |
799 | ||
2d4c5cbc LP |
800 | case DNS_TYPE_PTR: |
801 | case DNS_TYPE_NS: | |
802 | case DNS_TYPE_CNAME: | |
8ac4e9e1 | 803 | case DNS_TYPE_DNAME: |
2d4c5cbc LP |
804 | s = strjoin(k, " ", rr->ptr.name, NULL); |
805 | if (!s) | |
7b50eb2e | 806 | return NULL; |
322345fd | 807 | |
2d4c5cbc | 808 | break; |
322345fd | 809 | |
2d4c5cbc LP |
810 | case DNS_TYPE_HINFO: |
811 | s = strjoin(k, " ", rr->hinfo.cpu, " ", rr->hinfo.os, NULL); | |
812 | if (!s) | |
7b50eb2e | 813 | return NULL; |
2d4c5cbc | 814 | break; |
322345fd | 815 | |
9de3e329 | 816 | case DNS_TYPE_SPF: /* exactly the same as TXT */ |
8db0d2f5 | 817 | case DNS_TYPE_TXT: |
2001c805 | 818 | t = format_txt(rr->txt.items); |
2e276efc | 819 | if (!t) |
7b50eb2e | 820 | return NULL; |
2e276efc ZJS |
821 | |
822 | s = strjoin(k, " ", t, NULL); | |
823 | if (!s) | |
7b50eb2e | 824 | return NULL; |
2e276efc | 825 | break; |
2e276efc | 826 | |
2d4c5cbc LP |
827 | case DNS_TYPE_A: { |
828 | _cleanup_free_ char *x = NULL; | |
322345fd | 829 | |
2d4c5cbc LP |
830 | r = in_addr_to_string(AF_INET, (const union in_addr_union*) &rr->a.in_addr, &x); |
831 | if (r < 0) | |
7b50eb2e | 832 | return NULL; |
322345fd | 833 | |
2d4c5cbc LP |
834 | s = strjoin(k, " ", x, NULL); |
835 | if (!s) | |
7b50eb2e | 836 | return NULL; |
2d4c5cbc LP |
837 | break; |
838 | } | |
322345fd | 839 | |
8db0d2f5 ZJS |
840 | case DNS_TYPE_AAAA: |
841 | r = in_addr_to_string(AF_INET6, (const union in_addr_union*) &rr->aaaa.in6_addr, &t); | |
2d4c5cbc | 842 | if (r < 0) |
7b50eb2e | 843 | return NULL; |
322345fd | 844 | |
8db0d2f5 | 845 | s = strjoin(k, " ", t, NULL); |
2d4c5cbc | 846 | if (!s) |
7b50eb2e | 847 | return NULL; |
2d4c5cbc | 848 | break; |
322345fd | 849 | |
2d4c5cbc LP |
850 | case DNS_TYPE_SOA: |
851 | r = asprintf(&s, "%s %s %s %u %u %u %u %u", | |
852 | k, | |
853 | strna(rr->soa.mname), | |
854 | strna(rr->soa.rname), | |
855 | rr->soa.serial, | |
856 | rr->soa.refresh, | |
857 | rr->soa.retry, | |
858 | rr->soa.expire, | |
859 | rr->soa.minimum); | |
860 | if (r < 0) | |
7b50eb2e | 861 | return NULL; |
2d4c5cbc LP |
862 | break; |
863 | ||
946c7094 ZJS |
864 | case DNS_TYPE_MX: |
865 | r = asprintf(&s, "%s %u %s", | |
866 | k, | |
867 | rr->mx.priority, | |
868 | rr->mx.exchange); | |
869 | if (r < 0) | |
7b50eb2e | 870 | return NULL; |
946c7094 ZJS |
871 | break; |
872 | ||
8db0d2f5 | 873 | case DNS_TYPE_LOC: |
0dae31d4 ZJS |
874 | assert(rr->loc.version == 0); |
875 | ||
8db0d2f5 ZJS |
876 | t = format_location(rr->loc.latitude, |
877 | rr->loc.longitude, | |
878 | rr->loc.altitude, | |
879 | rr->loc.size, | |
880 | rr->loc.horiz_pre, | |
881 | rr->loc.vert_pre); | |
882 | if (!t) | |
7b50eb2e | 883 | return NULL; |
0dae31d4 | 884 | |
8db0d2f5 | 885 | s = strjoin(k, " ", t, NULL); |
0dae31d4 | 886 | if (!s) |
7b50eb2e | 887 | return NULL; |
0dae31d4 | 888 | break; |
0dae31d4 | 889 | |
abf126a3 TG |
890 | case DNS_TYPE_DS: |
891 | t = hexmem(rr->ds.digest, rr->ds.digest_size); | |
892 | if (!t) | |
7b50eb2e | 893 | return NULL; |
abf126a3 TG |
894 | |
895 | r = asprintf(&s, "%s %u %u %u %s", | |
896 | k, | |
897 | rr->ds.key_tag, | |
898 | rr->ds.algorithm, | |
899 | rr->ds.digest_type, | |
900 | t); | |
901 | if (r < 0) | |
7b50eb2e | 902 | return NULL; |
abf126a3 TG |
903 | break; |
904 | ||
8db0d2f5 | 905 | case DNS_TYPE_SSHFP: |
549c1a25 | 906 | t = hexmem(rr->sshfp.fingerprint, rr->sshfp.fingerprint_size); |
8db0d2f5 | 907 | if (!t) |
7b50eb2e | 908 | return NULL; |
42cc2eeb LP |
909 | |
910 | r = asprintf(&s, "%s %u %u %s", | |
911 | k, | |
912 | rr->sshfp.algorithm, | |
913 | rr->sshfp.fptype, | |
8db0d2f5 | 914 | t); |
42cc2eeb | 915 | if (r < 0) |
7b50eb2e | 916 | return NULL; |
42cc2eeb | 917 | break; |
42cc2eeb | 918 | |
ff3d6560 | 919 | case DNS_TYPE_DNSKEY: { |
8e54f5d9 | 920 | _cleanup_free_ char *alg = NULL; |
ff3d6560 | 921 | |
8e54f5d9 LP |
922 | r = dnssec_algorithm_to_string_alloc(rr->dnskey.algorithm, &alg); |
923 | if (r < 0) | |
924 | return NULL; | |
ff3d6560 | 925 | |
1bf968f3 | 926 | t = base64mem(rr->dnskey.key, rr->dnskey.key_size); |
8db0d2f5 | 927 | if (!t) |
7b50eb2e | 928 | return NULL; |
2d4c5cbc | 929 | |
8e54f5d9 | 930 | r = asprintf(&s, "%s %u %u %s %s", |
8db0d2f5 | 931 | k, |
f91dc240 LP |
932 | rr->dnskey.flags, |
933 | rr->dnskey.protocol, | |
8e54f5d9 | 934 | alg, |
8db0d2f5 ZJS |
935 | t); |
936 | if (r < 0) | |
7b50eb2e | 937 | return NULL; |
8db0d2f5 | 938 | break; |
ff3d6560 | 939 | } |
2d4c5cbc | 940 | |
151226ab | 941 | case DNS_TYPE_RRSIG: { |
8e54f5d9 | 942 | _cleanup_free_ char *alg = NULL; |
7c6423e1 | 943 | char expiration[strlen("YYYYMMDDHHmmSS") + 1], inception[strlen("YYYYMMDDHHmmSS") + 1]; |
8e54f5d9 | 944 | const char *type; |
151226ab ZJS |
945 | |
946 | type = dns_type_to_string(rr->rrsig.type_covered); | |
8e54f5d9 LP |
947 | |
948 | r = dnssec_algorithm_to_string_alloc(rr->rrsig.algorithm, &alg); | |
949 | if (r < 0) | |
950 | return NULL; | |
151226ab | 951 | |
1bf968f3 | 952 | t = base64mem(rr->rrsig.signature, rr->rrsig.signature_size); |
151226ab | 953 | if (!t) |
7b50eb2e | 954 | return NULL; |
151226ab | 955 | |
7c6423e1 TG |
956 | r = format_timestamp_dns(expiration, sizeof(expiration), rr->rrsig.expiration); |
957 | if (r < 0) | |
7b50eb2e | 958 | return NULL; |
7c6423e1 TG |
959 | |
960 | r = format_timestamp_dns(inception, sizeof(inception), rr->rrsig.inception); | |
961 | if (r < 0) | |
7b50eb2e | 962 | return NULL; |
7c6423e1 | 963 | |
151226ab ZJS |
964 | /* TYPE?? follows |
965 | * http://tools.ietf.org/html/rfc3597#section-5 */ | |
966 | ||
8e54f5d9 | 967 | r = asprintf(&s, "%s %s%.*u %s %u %u %s %s %u %s %s", |
151226ab ZJS |
968 | k, |
969 | type ?: "TYPE", | |
970 | type ? 0 : 1, type ? 0u : (unsigned) rr->rrsig.type_covered, | |
8e54f5d9 | 971 | alg, |
151226ab ZJS |
972 | rr->rrsig.labels, |
973 | rr->rrsig.original_ttl, | |
7c6423e1 TG |
974 | expiration, |
975 | inception, | |
151226ab ZJS |
976 | rr->rrsig.key_tag, |
977 | rr->rrsig.signer, | |
978 | t); | |
979 | if (r < 0) | |
7b50eb2e | 980 | return NULL; |
151226ab ZJS |
981 | break; |
982 | } | |
983 | ||
50f1e641 TG |
984 | case DNS_TYPE_NSEC: |
985 | t = format_types(rr->nsec.types); | |
986 | if (!t) | |
7b50eb2e | 987 | return NULL; |
50f1e641 TG |
988 | |
989 | r = asprintf(&s, "%s %s %s", | |
990 | k, | |
991 | rr->nsec.next_domain_name, | |
992 | t); | |
993 | if (r < 0) | |
7b50eb2e | 994 | return NULL; |
50f1e641 TG |
995 | break; |
996 | ||
5d45a880 TG |
997 | case DNS_TYPE_NSEC3: { |
998 | _cleanup_free_ char *salt = NULL, *hash = NULL; | |
999 | ||
f5430a3e | 1000 | if (rr->nsec3.salt_size > 0) { |
5d45a880 TG |
1001 | salt = hexmem(rr->nsec3.salt, rr->nsec3.salt_size); |
1002 | if (!salt) | |
7b50eb2e | 1003 | return NULL; |
5d45a880 TG |
1004 | } |
1005 | ||
1006 | hash = base32hexmem(rr->nsec3.next_hashed_name, rr->nsec3.next_hashed_name_size, false); | |
1007 | if (!hash) | |
7b50eb2e | 1008 | return NULL; |
5d45a880 TG |
1009 | |
1010 | t = format_types(rr->nsec3.types); | |
1011 | if (!t) | |
7b50eb2e | 1012 | return NULL; |
5d45a880 TG |
1013 | |
1014 | r = asprintf(&s, "%s %"PRIu8" %"PRIu8" %"PRIu16" %s %s %s", | |
1015 | k, | |
1016 | rr->nsec3.algorithm, | |
1017 | rr->nsec3.flags, | |
1018 | rr->nsec3.iterations, | |
f5430a3e | 1019 | rr->nsec3.salt_size > 0 ? salt : "-", |
5d45a880 TG |
1020 | hash, |
1021 | t); | |
1022 | if (r < 0) | |
7b50eb2e | 1023 | return NULL; |
5d45a880 TG |
1024 | |
1025 | break; | |
1026 | } | |
1027 | ||
8db0d2f5 ZJS |
1028 | default: |
1029 | t = hexmem(rr->generic.data, rr->generic.size); | |
1030 | if (!t) | |
7b50eb2e | 1031 | return NULL; |
8db0d2f5 | 1032 | |
6af47493 | 1033 | /* Format as documented in RFC 3597, Section 5 */ |
f5430a3e | 1034 | r = asprintf(&s, "%s \\# %zu %s", k, rr->generic.size, t); |
d23a27a9 | 1035 | if (r < 0) |
7b50eb2e | 1036 | return NULL; |
2d4c5cbc | 1037 | break; |
8db0d2f5 | 1038 | } |
2d4c5cbc | 1039 | |
7b50eb2e LP |
1040 | rr->to_string = s; |
1041 | return s; | |
2d4c5cbc | 1042 | } |
322345fd | 1043 | |
a8812dd7 LP |
1044 | int dns_resource_record_to_wire_format(DnsResourceRecord *rr, bool canonical) { |
1045 | ||
1046 | DnsPacket packet = { | |
1047 | .n_ref = 1, | |
1048 | .protocol = DNS_PROTOCOL_DNS, | |
1049 | .on_stack = true, | |
1050 | .refuse_compression = true, | |
1051 | .canonical_form = canonical, | |
1052 | }; | |
1053 | ||
1054 | size_t start, rds; | |
1055 | int r; | |
1056 | ||
1057 | assert(rr); | |
1058 | ||
1059 | /* Generates the RR in wire-format, optionally in the | |
1060 | * canonical form as discussed in the DNSSEC RFC 4034, Section | |
1061 | * 6.2. We allocate a throw-away DnsPacket object on the stack | |
1062 | * here, because we need some book-keeping for memory | |
1063 | * management, and can reuse the DnsPacket serializer, that | |
1064 | * can generate the canonical form, too, but also knows label | |
1065 | * compression and suchlike. */ | |
1066 | ||
1067 | if (rr->wire_format && rr->wire_format_canonical == canonical) | |
1068 | return 0; | |
1069 | ||
1070 | r = dns_packet_append_rr(&packet, rr, &start, &rds); | |
1071 | if (r < 0) | |
1072 | return r; | |
1073 | ||
1074 | assert(start == 0); | |
1075 | assert(packet._data); | |
1076 | ||
1077 | free(rr->wire_format); | |
1078 | rr->wire_format = packet._data; | |
1079 | rr->wire_format_size = packet.size; | |
1080 | rr->wire_format_rdata_offset = rds; | |
1081 | rr->wire_format_canonical = canonical; | |
1082 | ||
1083 | packet._data = NULL; | |
1084 | dns_packet_unref(&packet); | |
1085 | ||
1086 | return 0; | |
1087 | } | |
1088 | ||
97c67192 LP |
1089 | int dns_resource_record_signer(DnsResourceRecord *rr, const char **ret) { |
1090 | const char *n; | |
1091 | int r; | |
1092 | ||
1093 | assert(rr); | |
1094 | assert(ret); | |
1095 | ||
1096 | /* Returns the RRset's signer, if it is known. */ | |
1097 | ||
1098 | if (rr->n_skip_labels_signer == (unsigned) -1) | |
1099 | return -ENODATA; | |
1100 | ||
1101 | n = DNS_RESOURCE_KEY_NAME(rr->key); | |
1102 | r = dns_name_skip(n, rr->n_skip_labels_signer, &n); | |
1103 | if (r < 0) | |
1104 | return r; | |
1105 | if (r == 0) | |
1106 | return -EINVAL; | |
1107 | ||
1108 | *ret = n; | |
1109 | return 0; | |
1110 | } | |
1111 | ||
1112 | int dns_resource_record_source(DnsResourceRecord *rr, const char **ret) { | |
1113 | const char *n; | |
1114 | int r; | |
1115 | ||
1116 | assert(rr); | |
1117 | assert(ret); | |
1118 | ||
1119 | /* Returns the RRset's synthesizing source, if it is known. */ | |
1120 | ||
1121 | if (rr->n_skip_labels_source == (unsigned) -1) | |
1122 | return -ENODATA; | |
1123 | ||
1124 | n = DNS_RESOURCE_KEY_NAME(rr->key); | |
1125 | r = dns_name_skip(n, rr->n_skip_labels_source, &n); | |
1126 | if (r < 0) | |
1127 | return r; | |
1128 | if (r == 0) | |
1129 | return -EINVAL; | |
1130 | ||
1131 | *ret = n; | |
1132 | return 0; | |
1133 | } | |
1134 | ||
1135 | int dns_resource_record_is_signer(DnsResourceRecord *rr, const char *zone) { | |
1136 | const char *signer; | |
1137 | int r; | |
1138 | ||
ab481675 LP |
1139 | assert(rr); |
1140 | ||
97c67192 LP |
1141 | r = dns_resource_record_signer(rr, &signer); |
1142 | if (r < 0) | |
1143 | return r; | |
1144 | ||
1145 | return dns_name_equal(zone, signer); | |
1146 | } | |
1147 | ||
ab481675 LP |
1148 | int dns_resource_record_is_synthetic(DnsResourceRecord *rr) { |
1149 | int r; | |
1150 | ||
1151 | assert(rr); | |
1152 | ||
1153 | /* Returns > 0 if the RR is generated from a wildcard, and is not the asterisk name itself */ | |
1154 | ||
1155 | if (rr->n_skip_labels_source == (unsigned) -1) | |
1156 | return -ENODATA; | |
1157 | ||
1158 | if (rr->n_skip_labels_source == 0) | |
1159 | return 0; | |
1160 | ||
1161 | if (rr->n_skip_labels_source > 1) | |
1162 | return 1; | |
1163 | ||
1164 | r = dns_name_startswith(DNS_RESOURCE_KEY_NAME(rr->key), "*"); | |
1165 | if (r < 0) | |
1166 | return r; | |
1167 | ||
1168 | return !r; | |
1169 | } | |
1170 | ||
c9c72065 LP |
1171 | static void dns_resource_record_hash_func(const void *i, struct siphash *state) { |
1172 | const DnsResourceRecord *rr = i; | |
1173 | ||
1174 | assert(rr); | |
1175 | ||
1176 | dns_resource_key_hash_func(rr->key, state); | |
1177 | ||
1178 | switch (rr->unparseable ? _DNS_TYPE_INVALID : rr->key->type) { | |
1179 | ||
1180 | case DNS_TYPE_SRV: | |
1181 | siphash24_compress(&rr->srv.priority, sizeof(rr->srv.priority), state); | |
1182 | siphash24_compress(&rr->srv.weight, sizeof(rr->srv.weight), state); | |
1183 | siphash24_compress(&rr->srv.port, sizeof(rr->srv.port), state); | |
1184 | dns_name_hash_func(rr->srv.name, state); | |
1185 | break; | |
1186 | ||
1187 | case DNS_TYPE_PTR: | |
1188 | case DNS_TYPE_NS: | |
1189 | case DNS_TYPE_CNAME: | |
1190 | case DNS_TYPE_DNAME: | |
1191 | dns_name_hash_func(rr->ptr.name, state); | |
1192 | break; | |
1193 | ||
1194 | case DNS_TYPE_HINFO: | |
1195 | string_hash_func(rr->hinfo.cpu, state); | |
1196 | string_hash_func(rr->hinfo.os, state); | |
1197 | break; | |
1198 | ||
1199 | case DNS_TYPE_TXT: | |
1200 | case DNS_TYPE_SPF: { | |
1201 | DnsTxtItem *j; | |
1202 | ||
1203 | LIST_FOREACH(items, j, rr->txt.items) { | |
1204 | siphash24_compress(j->data, j->length, state); | |
1205 | ||
d5115566 LP |
1206 | /* Add an extra NUL byte, so that "a" followed by "b" doesn't result in the same hash as "ab" |
1207 | * followed by "". */ | |
1208 | siphash24_compress_byte(0, state); | |
c9c72065 LP |
1209 | } |
1210 | break; | |
1211 | } | |
1212 | ||
1213 | case DNS_TYPE_A: | |
1214 | siphash24_compress(&rr->a.in_addr, sizeof(rr->a.in_addr), state); | |
1215 | break; | |
1216 | ||
1217 | case DNS_TYPE_AAAA: | |
1218 | siphash24_compress(&rr->aaaa.in6_addr, sizeof(rr->aaaa.in6_addr), state); | |
1219 | break; | |
1220 | ||
1221 | case DNS_TYPE_SOA: | |
1222 | dns_name_hash_func(rr->soa.mname, state); | |
1223 | dns_name_hash_func(rr->soa.rname, state); | |
1224 | siphash24_compress(&rr->soa.serial, sizeof(rr->soa.serial), state); | |
1225 | siphash24_compress(&rr->soa.refresh, sizeof(rr->soa.refresh), state); | |
1226 | siphash24_compress(&rr->soa.retry, sizeof(rr->soa.retry), state); | |
1227 | siphash24_compress(&rr->soa.expire, sizeof(rr->soa.expire), state); | |
1228 | siphash24_compress(&rr->soa.minimum, sizeof(rr->soa.minimum), state); | |
1229 | break; | |
1230 | ||
1231 | case DNS_TYPE_MX: | |
1232 | siphash24_compress(&rr->mx.priority, sizeof(rr->mx.priority), state); | |
1233 | dns_name_hash_func(rr->mx.exchange, state); | |
1234 | break; | |
1235 | ||
1236 | case DNS_TYPE_LOC: | |
1237 | siphash24_compress(&rr->loc.version, sizeof(rr->loc.version), state); | |
1238 | siphash24_compress(&rr->loc.size, sizeof(rr->loc.size), state); | |
1239 | siphash24_compress(&rr->loc.horiz_pre, sizeof(rr->loc.horiz_pre), state); | |
1240 | siphash24_compress(&rr->loc.vert_pre, sizeof(rr->loc.vert_pre), state); | |
1241 | siphash24_compress(&rr->loc.latitude, sizeof(rr->loc.latitude), state); | |
1242 | siphash24_compress(&rr->loc.longitude, sizeof(rr->loc.longitude), state); | |
1243 | siphash24_compress(&rr->loc.altitude, sizeof(rr->loc.altitude), state); | |
1244 | break; | |
1245 | ||
1246 | case DNS_TYPE_SSHFP: | |
1247 | siphash24_compress(&rr->sshfp.algorithm, sizeof(rr->sshfp.algorithm), state); | |
1248 | siphash24_compress(&rr->sshfp.fptype, sizeof(rr->sshfp.fptype), state); | |
1249 | siphash24_compress(rr->sshfp.fingerprint, rr->sshfp.fingerprint_size, state); | |
1250 | break; | |
1251 | ||
1252 | case DNS_TYPE_DNSKEY: | |
1253 | siphash24_compress(&rr->dnskey.flags, sizeof(rr->dnskey.flags), state); | |
1254 | siphash24_compress(&rr->dnskey.protocol, sizeof(rr->dnskey.protocol), state); | |
1255 | siphash24_compress(&rr->dnskey.algorithm, sizeof(rr->dnskey.algorithm), state); | |
1256 | siphash24_compress(rr->dnskey.key, rr->dnskey.key_size, state); | |
1257 | break; | |
1258 | ||
1259 | case DNS_TYPE_RRSIG: | |
1260 | siphash24_compress(&rr->rrsig.type_covered, sizeof(rr->rrsig.type_covered), state); | |
1261 | siphash24_compress(&rr->rrsig.algorithm, sizeof(rr->rrsig.algorithm), state); | |
1262 | siphash24_compress(&rr->rrsig.labels, sizeof(rr->rrsig.labels), state); | |
1263 | siphash24_compress(&rr->rrsig.original_ttl, sizeof(rr->rrsig.original_ttl), state); | |
1264 | siphash24_compress(&rr->rrsig.expiration, sizeof(rr->rrsig.expiration), state); | |
1265 | siphash24_compress(&rr->rrsig.inception, sizeof(rr->rrsig.inception), state); | |
1266 | siphash24_compress(&rr->rrsig.key_tag, sizeof(rr->rrsig.key_tag), state); | |
1267 | dns_name_hash_func(rr->rrsig.signer, state); | |
1268 | siphash24_compress(rr->rrsig.signature, rr->rrsig.signature_size, state); | |
1269 | break; | |
1270 | ||
1271 | case DNS_TYPE_NSEC: | |
1272 | dns_name_hash_func(rr->nsec.next_domain_name, state); | |
1273 | /* FIXME: we leave out the type bitmap here. Hash | |
1274 | * would be better if we'd take it into account | |
1275 | * too. */ | |
1276 | break; | |
1277 | ||
1278 | case DNS_TYPE_DS: | |
1279 | siphash24_compress(&rr->ds.key_tag, sizeof(rr->ds.key_tag), state); | |
1280 | siphash24_compress(&rr->ds.algorithm, sizeof(rr->ds.algorithm), state); | |
1281 | siphash24_compress(&rr->ds.digest_type, sizeof(rr->ds.digest_type), state); | |
1282 | siphash24_compress(rr->ds.digest, rr->ds.digest_size, state); | |
1283 | break; | |
1284 | ||
1285 | case DNS_TYPE_NSEC3: | |
1286 | siphash24_compress(&rr->nsec3.algorithm, sizeof(rr->nsec3.algorithm), state); | |
1287 | siphash24_compress(&rr->nsec3.flags, sizeof(rr->nsec3.flags), state); | |
1288 | siphash24_compress(&rr->nsec3.iterations, sizeof(rr->nsec3.iterations), state); | |
1289 | siphash24_compress(rr->nsec3.salt, rr->nsec3.salt_size, state); | |
1290 | siphash24_compress(rr->nsec3.next_hashed_name, rr->nsec3.next_hashed_name_size, state); | |
1291 | /* FIXME: We leave the bitmaps out */ | |
1292 | break; | |
1293 | ||
1294 | default: | |
1295 | siphash24_compress(rr->generic.data, rr->generic.size, state); | |
1296 | break; | |
1297 | } | |
1298 | } | |
1299 | ||
1300 | static int dns_resource_record_compare_func(const void *a, const void *b) { | |
1301 | const DnsResourceRecord *x = a, *y = b; | |
1302 | int ret; | |
1303 | ||
1304 | ret = dns_resource_key_compare_func(x->key, y->key); | |
1305 | if (ret != 0) | |
1306 | return ret; | |
1307 | ||
1308 | if (dns_resource_record_equal(x, y)) | |
1309 | return 0; | |
1310 | ||
1311 | /* This is a bit dirty, we don't implement proper odering, but | |
1312 | * the hashtable doesn't need ordering anyway, hence we don't | |
1313 | * care. */ | |
1314 | return x < y ? -1 : 1; | |
1315 | } | |
1316 | ||
1317 | const struct hash_ops dns_resource_record_hash_ops = { | |
1318 | .hash = dns_resource_record_hash_func, | |
1319 | .compare = dns_resource_record_compare_func, | |
1320 | }; | |
1321 | ||
2001c805 LP |
1322 | DnsTxtItem *dns_txt_item_free_all(DnsTxtItem *i) { |
1323 | DnsTxtItem *n; | |
1324 | ||
1325 | if (!i) | |
1326 | return NULL; | |
1327 | ||
1328 | n = i->items_next; | |
1329 | ||
1330 | free(i); | |
1331 | return dns_txt_item_free_all(n); | |
1332 | } | |
1333 | ||
1334 | bool dns_txt_item_equal(DnsTxtItem *a, DnsTxtItem *b) { | |
1335 | ||
4d247a6c LP |
1336 | if (a == b) |
1337 | return true; | |
1338 | ||
2001c805 LP |
1339 | if (!a != !b) |
1340 | return false; | |
1341 | ||
1342 | if (!a) | |
1343 | return true; | |
1344 | ||
1345 | if (a->length != b->length) | |
1346 | return false; | |
1347 | ||
1348 | if (memcmp(a->data, b->data, a->length) != 0) | |
1349 | return false; | |
1350 | ||
1351 | return dns_txt_item_equal(a->items_next, b->items_next); | |
1352 | } | |
8730bccf LP |
1353 | |
1354 | static const char* const dnssec_algorithm_table[_DNSSEC_ALGORITHM_MAX_DEFINED] = { | |
6f717d08 | 1355 | /* Mnemonics as listed on https://www.iana.org/assignments/dns-sec-alg-numbers/dns-sec-alg-numbers.xhtml */ |
8730bccf LP |
1356 | [DNSSEC_ALGORITHM_RSAMD5] = "RSAMD5", |
1357 | [DNSSEC_ALGORITHM_DH] = "DH", | |
1358 | [DNSSEC_ALGORITHM_DSA] = "DSA", | |
1359 | [DNSSEC_ALGORITHM_ECC] = "ECC", | |
1360 | [DNSSEC_ALGORITHM_RSASHA1] = "RSASHA1", | |
1361 | [DNSSEC_ALGORITHM_DSA_NSEC3_SHA1] = "DSA-NSEC3-SHA1", | |
1362 | [DNSSEC_ALGORITHM_RSASHA1_NSEC3_SHA1] = "RSASHA1-NSEC3-SHA1", | |
1363 | [DNSSEC_ALGORITHM_RSASHA256] = "RSASHA256", | |
1364 | [DNSSEC_ALGORITHM_RSASHA512] = "RSASHA512", | |
6f717d08 LP |
1365 | [DNSSEC_ALGORITHM_ECC_GOST] = "ECC-GOST", |
1366 | [DNSSEC_ALGORITHM_ECDSAP256SHA256] = "ECDSAP256SHA256", | |
1367 | [DNSSEC_ALGORITHM_ECDSAP384SHA384] = "ECDSAP384SHA384", | |
8730bccf LP |
1368 | [DNSSEC_ALGORITHM_INDIRECT] = "INDIRECT", |
1369 | [DNSSEC_ALGORITHM_PRIVATEDNS] = "PRIVATEDNS", | |
1370 | [DNSSEC_ALGORITHM_PRIVATEOID] = "PRIVATEOID", | |
1371 | }; | |
8e54f5d9 | 1372 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(dnssec_algorithm, int, 255); |
8730bccf LP |
1373 | |
1374 | static const char* const dnssec_digest_table[_DNSSEC_DIGEST_MAX_DEFINED] = { | |
6f717d08 LP |
1375 | /* Names as listed on https://www.iana.org/assignments/ds-rr-types/ds-rr-types.xhtml */ |
1376 | [DNSSEC_DIGEST_SHA1] = "SHA-1", | |
1377 | [DNSSEC_DIGEST_SHA256] = "SHA-256", | |
1378 | [DNSSEC_DIGEST_GOST_R_34_11_94] = "GOST_R_34.11-94", | |
1379 | [DNSSEC_DIGEST_SHA384] = "SHA-384", | |
8730bccf | 1380 | }; |
8e54f5d9 | 1381 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(dnssec_digest, int, 255); |