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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" | |
d7671a3e | 33 | #include "terminal-util.h" |
74b2466e | 34 | |
faa133f3 LP |
35 | DnsResourceKey* dns_resource_key_new(uint16_t class, uint16_t type, const char *name) { |
36 | DnsResourceKey *k; | |
37 | size_t l; | |
74b2466e | 38 | |
faa133f3 LP |
39 | assert(name); |
40 | ||
41 | l = strlen(name); | |
42 | k = malloc0(sizeof(DnsResourceKey) + l + 1); | |
43 | if (!k) | |
44 | return NULL; | |
45 | ||
46 | k->n_ref = 1; | |
47 | k->class = class; | |
48 | k->type = type; | |
49 | ||
50 | strcpy((char*) k + sizeof(DnsResourceKey), name); | |
51 | ||
52 | return k; | |
53 | } | |
54 | ||
36d9205d | 55 | DnsResourceKey* dns_resource_key_new_redirect(const DnsResourceKey *key, const DnsResourceRecord *cname) { |
58db254a LP |
56 | int r; |
57 | ||
36d9205d TG |
58 | assert(key); |
59 | assert(cname); | |
60 | ||
58db254a LP |
61 | assert(IN_SET(cname->key->type, DNS_TYPE_CNAME, DNS_TYPE_DNAME)); |
62 | ||
63 | if (cname->key->type == DNS_TYPE_CNAME) | |
64 | return dns_resource_key_new(key->class, key->type, cname->cname.name); | |
65 | else { | |
66 | DnsResourceKey *k; | |
67 | char *destination = NULL; | |
68 | ||
69 | r = dns_name_change_suffix(DNS_RESOURCE_KEY_NAME(key), DNS_RESOURCE_KEY_NAME(cname->key), cname->dname.name, &destination); | |
70 | if (r < 0) | |
71 | return NULL; | |
72 | if (r == 0) | |
73 | return dns_resource_key_ref((DnsResourceKey*) key); | |
74 | ||
75 | k = dns_resource_key_new_consume(key->class, key->type, destination); | |
76 | if (!k) { | |
77 | free(destination); | |
78 | return NULL; | |
79 | } | |
80 | ||
81 | return k; | |
82 | } | |
36d9205d TG |
83 | } |
84 | ||
801ad6a6 LP |
85 | int dns_resource_key_new_append_suffix(DnsResourceKey **ret, DnsResourceKey *key, char *name) { |
86 | DnsResourceKey *new_key; | |
87 | char *joined; | |
88 | int r; | |
89 | ||
90 | assert(ret); | |
91 | assert(key); | |
92 | assert(name); | |
93 | ||
dc477e73 | 94 | if (dns_name_is_root(name)) { |
801ad6a6 LP |
95 | *ret = dns_resource_key_ref(key); |
96 | return 0; | |
97 | } | |
98 | ||
99 | r = dns_name_concat(DNS_RESOURCE_KEY_NAME(key), name, &joined); | |
100 | if (r < 0) | |
101 | return r; | |
102 | ||
103 | new_key = dns_resource_key_new_consume(key->class, key->type, joined); | |
104 | if (!new_key) { | |
105 | free(joined); | |
106 | return -ENOMEM; | |
107 | } | |
108 | ||
109 | *ret = new_key; | |
110 | return 0; | |
111 | } | |
112 | ||
faa133f3 LP |
113 | DnsResourceKey* dns_resource_key_new_consume(uint16_t class, uint16_t type, char *name) { |
114 | DnsResourceKey *k; | |
115 | ||
116 | assert(name); | |
117 | ||
118 | k = new0(DnsResourceKey, 1); | |
119 | if (!k) | |
120 | return NULL; | |
121 | ||
122 | k->n_ref = 1; | |
123 | k->class = class; | |
124 | k->type = type; | |
125 | k->_name = name; | |
126 | ||
127 | return k; | |
128 | } | |
129 | ||
130 | DnsResourceKey* dns_resource_key_ref(DnsResourceKey *k) { | |
131 | ||
132 | if (!k) | |
133 | return NULL; | |
134 | ||
1b4f6e79 LP |
135 | /* Static/const keys created with DNS_RESOURCE_KEY_CONST will |
136 | * set this to -1, they should not be reffed/unreffed */ | |
137 | assert(k->n_ref != (unsigned) -1); | |
138 | ||
faa133f3 LP |
139 | assert(k->n_ref > 0); |
140 | k->n_ref++; | |
141 | ||
142 | return k; | |
143 | } | |
144 | ||
145 | DnsResourceKey* dns_resource_key_unref(DnsResourceKey *k) { | |
146 | if (!k) | |
147 | return NULL; | |
148 | ||
1b4f6e79 | 149 | assert(k->n_ref != (unsigned) -1); |
faa133f3 LP |
150 | assert(k->n_ref > 0); |
151 | ||
152 | if (k->n_ref == 1) { | |
153 | free(k->_name); | |
154 | free(k); | |
155 | } else | |
156 | k->n_ref--; | |
157 | ||
158 | return NULL; | |
159 | } | |
160 | ||
28b9b764 LP |
161 | bool dns_resource_key_is_address(const DnsResourceKey *key) { |
162 | assert(key); | |
163 | ||
164 | /* Check if this is an A or AAAA resource key */ | |
165 | ||
166 | return key->class == DNS_CLASS_IN && IN_SET(key->type, DNS_TYPE_A, DNS_TYPE_AAAA); | |
167 | } | |
168 | ||
faa133f3 LP |
169 | int dns_resource_key_equal(const DnsResourceKey *a, const DnsResourceKey *b) { |
170 | int r; | |
171 | ||
4d247a6c LP |
172 | if (a == b) |
173 | return 1; | |
174 | ||
faa133f3 LP |
175 | r = dns_name_equal(DNS_RESOURCE_KEY_NAME(a), DNS_RESOURCE_KEY_NAME(b)); |
176 | if (r <= 0) | |
177 | return r; | |
178 | ||
179 | if (a->class != b->class) | |
180 | return 0; | |
181 | ||
182 | if (a->type != b->type) | |
183 | return 0; | |
184 | ||
185 | return 1; | |
186 | } | |
187 | ||
105e1512 | 188 | int dns_resource_key_match_rr(const DnsResourceKey *key, DnsResourceRecord *rr, const char *search_domain) { |
801ad6a6 LP |
189 | int r; |
190 | ||
faa133f3 LP |
191 | assert(key); |
192 | assert(rr); | |
193 | ||
4d247a6c LP |
194 | if (key == rr->key) |
195 | return 1; | |
196 | ||
801ad6a6 LP |
197 | /* Checks if an rr matches the specified key. If a search |
198 | * domain is specified, it will also be checked if the key | |
199 | * with the search domain suffixed might match the RR. */ | |
200 | ||
faa133f3 LP |
201 | if (rr->key->class != key->class && key->class != DNS_CLASS_ANY) |
202 | return 0; | |
203 | ||
204 | if (rr->key->type != key->type && key->type != DNS_TYPE_ANY) | |
205 | return 0; | |
206 | ||
801ad6a6 LP |
207 | r = dns_name_equal(DNS_RESOURCE_KEY_NAME(rr->key), DNS_RESOURCE_KEY_NAME(key)); |
208 | if (r != 0) | |
209 | return r; | |
210 | ||
211 | if (search_domain) { | |
212 | _cleanup_free_ char *joined = NULL; | |
213 | ||
214 | r = dns_name_concat(DNS_RESOURCE_KEY_NAME(key), search_domain, &joined); | |
215 | if (r < 0) | |
216 | return r; | |
217 | ||
218 | return dns_name_equal(DNS_RESOURCE_KEY_NAME(rr->key), joined); | |
219 | } | |
220 | ||
221 | return 0; | |
faa133f3 LP |
222 | } |
223 | ||
5d27351f | 224 | int dns_resource_key_match_cname_or_dname(const DnsResourceKey *key, const DnsResourceKey *cname, const char *search_domain) { |
801ad6a6 LP |
225 | int r; |
226 | ||
faa133f3 | 227 | assert(key); |
5d27351f | 228 | assert(cname); |
faa133f3 | 229 | |
5d27351f | 230 | if (cname->class != key->class && key->class != DNS_CLASS_ANY) |
faa133f3 LP |
231 | return 0; |
232 | ||
5d27351f TG |
233 | if (cname->type == DNS_TYPE_CNAME) |
234 | r = dns_name_equal(DNS_RESOURCE_KEY_NAME(key), DNS_RESOURCE_KEY_NAME(cname)); | |
235 | else if (cname->type == DNS_TYPE_DNAME) | |
236 | r = dns_name_endswith(DNS_RESOURCE_KEY_NAME(key), DNS_RESOURCE_KEY_NAME(cname)); | |
58db254a | 237 | else |
faa133f3 | 238 | return 0; |
801ad6a6 LP |
239 | |
240 | if (r != 0) | |
241 | return r; | |
242 | ||
243 | if (search_domain) { | |
244 | _cleanup_free_ char *joined = NULL; | |
245 | ||
246 | r = dns_name_concat(DNS_RESOURCE_KEY_NAME(key), search_domain, &joined); | |
247 | if (r < 0) | |
248 | return r; | |
249 | ||
5d27351f TG |
250 | if (cname->type == DNS_TYPE_CNAME) |
251 | return dns_name_equal(joined, DNS_RESOURCE_KEY_NAME(cname)); | |
252 | else if (cname->type == DNS_TYPE_DNAME) | |
253 | return dns_name_endswith(joined, DNS_RESOURCE_KEY_NAME(cname)); | |
801ad6a6 LP |
254 | } |
255 | ||
256 | return 0; | |
547973de LP |
257 | } |
258 | ||
259 | int dns_resource_key_match_soa(const DnsResourceKey *key, const DnsResourceKey *soa) { | |
260 | assert(soa); | |
261 | assert(key); | |
262 | ||
263 | /* Checks whether 'soa' is a SOA record for the specified key. */ | |
264 | ||
65b200e7 | 265 | if (soa->class != key->class) |
547973de | 266 | return 0; |
801ad6a6 | 267 | |
547973de LP |
268 | if (soa->type != DNS_TYPE_SOA) |
269 | return 0; | |
270 | ||
0936416a | 271 | return dns_name_endswith(DNS_RESOURCE_KEY_NAME(key), DNS_RESOURCE_KEY_NAME(soa)); |
74b2466e LP |
272 | } |
273 | ||
b826ab58 | 274 | static void dns_resource_key_hash_func(const void *i, struct siphash *state) { |
322345fd | 275 | const DnsResourceKey *k = i; |
322345fd | 276 | |
b826ab58 | 277 | assert(k); |
322345fd | 278 | |
b826ab58 TG |
279 | dns_name_hash_func(DNS_RESOURCE_KEY_NAME(k), state); |
280 | siphash24_compress(&k->class, sizeof(k->class), state); | |
281 | siphash24_compress(&k->type, sizeof(k->type), state); | |
322345fd LP |
282 | } |
283 | ||
d5099efc | 284 | static int dns_resource_key_compare_func(const void *a, const void *b) { |
322345fd LP |
285 | const DnsResourceKey *x = a, *y = b; |
286 | int ret; | |
287 | ||
faa133f3 | 288 | ret = dns_name_compare_func(DNS_RESOURCE_KEY_NAME(x), DNS_RESOURCE_KEY_NAME(y)); |
322345fd LP |
289 | if (ret != 0) |
290 | return ret; | |
291 | ||
292 | if (x->type < y->type) | |
293 | return -1; | |
294 | if (x->type > y->type) | |
295 | return 1; | |
296 | ||
297 | if (x->class < y->class) | |
298 | return -1; | |
299 | if (x->class > y->class) | |
300 | return 1; | |
301 | ||
302 | return 0; | |
303 | } | |
304 | ||
d5099efc MS |
305 | const struct hash_ops dns_resource_key_hash_ops = { |
306 | .hash = dns_resource_key_hash_func, | |
307 | .compare = dns_resource_key_compare_func | |
308 | }; | |
309 | ||
2d4c5cbc | 310 | int dns_resource_key_to_string(const DnsResourceKey *key, char **ret) { |
d23a27a9 | 311 | char cbuf[strlen("CLASS") + DECIMAL_STR_MAX(uint16_t)], tbuf[strlen("TYPE") + DECIMAL_STR_MAX(uint16_t)]; |
f2af5ea3 | 312 | const char *c, *t, *n; |
2d4c5cbc LP |
313 | char *s; |
314 | ||
6af47493 LP |
315 | /* If we cannot convert the CLASS/TYPE into a known string, |
316 | use the format recommended by RFC 3597, Section 5. */ | |
317 | ||
2d4c5cbc LP |
318 | c = dns_class_to_string(key->class); |
319 | if (!c) { | |
d23a27a9 | 320 | sprintf(cbuf, "CLASS%u", key->class); |
2d4c5cbc LP |
321 | c = cbuf; |
322 | } | |
323 | ||
324 | t = dns_type_to_string(key->type); | |
325 | if (!t){ | |
d23a27a9 | 326 | sprintf(tbuf, "TYPE%u", key->type); |
2d4c5cbc LP |
327 | t = tbuf; |
328 | } | |
329 | ||
f2af5ea3 LP |
330 | n = DNS_RESOURCE_KEY_NAME(key); |
331 | if (asprintf(&s, "%s%s %s %-5s", n, endswith(n, ".") ? "" : ".", c, t) < 0) | |
2d4c5cbc LP |
332 | return -ENOMEM; |
333 | ||
334 | *ret = s; | |
335 | return 0; | |
336 | } | |
337 | ||
f57e3cd5 LP |
338 | bool dns_resource_key_reduce(DnsResourceKey **a, DnsResourceKey **b) { |
339 | assert(a); | |
340 | assert(b); | |
341 | ||
342 | /* Try to replace one RR key by another if they are identical, thus saving a bit of memory. Note that we do | |
343 | * this only for RR keys, not for RRs themselves, as they carry a lot of additional metadata (where they come | |
344 | * from, validity data, and suchlike), and cannot be replaced so easily by other RRs that have the same | |
345 | * superficial data. */ | |
346 | ||
347 | if (!*a) | |
348 | return false; | |
349 | if (!*b) | |
350 | return false; | |
351 | ||
352 | /* We refuse merging const keys */ | |
353 | if ((*a)->n_ref == (unsigned) -1) | |
354 | return false; | |
355 | if ((*b)->n_ref == (unsigned) -1) | |
356 | return false; | |
357 | ||
358 | /* Already the same? */ | |
359 | if (*a == *b) | |
360 | return true; | |
361 | ||
362 | /* Are they really identical? */ | |
363 | if (dns_resource_key_equal(*a, *b) <= 0) | |
364 | return false; | |
365 | ||
366 | /* Keep the one which already has more references. */ | |
367 | if ((*a)->n_ref > (*b)->n_ref) { | |
368 | dns_resource_key_unref(*b); | |
369 | *b = dns_resource_key_ref(*a); | |
370 | } else { | |
371 | dns_resource_key_unref(*a); | |
372 | *a = dns_resource_key_ref(*b); | |
373 | } | |
374 | ||
375 | return true; | |
376 | } | |
377 | ||
faa133f3 | 378 | DnsResourceRecord* dns_resource_record_new(DnsResourceKey *key) { |
74b2466e LP |
379 | DnsResourceRecord *rr; |
380 | ||
381 | rr = new0(DnsResourceRecord, 1); | |
382 | if (!rr) | |
383 | return NULL; | |
384 | ||
385 | rr->n_ref = 1; | |
faa133f3 | 386 | rr->key = dns_resource_key_ref(key); |
ee3d6aff | 387 | rr->expiry = USEC_INFINITY; |
97c67192 | 388 | rr->n_skip_labels_signer = rr->n_skip_labels_source = (unsigned) -1; |
faa133f3 | 389 | |
74b2466e LP |
390 | return rr; |
391 | } | |
392 | ||
8bf52d3d LP |
393 | DnsResourceRecord* dns_resource_record_new_full(uint16_t class, uint16_t type, const char *name) { |
394 | _cleanup_(dns_resource_key_unrefp) DnsResourceKey *key = NULL; | |
395 | ||
396 | key = dns_resource_key_new(class, type, name); | |
397 | if (!key) | |
398 | return NULL; | |
399 | ||
400 | return dns_resource_record_new(key); | |
401 | } | |
402 | ||
74b2466e LP |
403 | DnsResourceRecord* dns_resource_record_ref(DnsResourceRecord *rr) { |
404 | if (!rr) | |
405 | return NULL; | |
406 | ||
407 | assert(rr->n_ref > 0); | |
408 | rr->n_ref++; | |
409 | ||
410 | return rr; | |
411 | } | |
412 | ||
413 | DnsResourceRecord* dns_resource_record_unref(DnsResourceRecord *rr) { | |
414 | if (!rr) | |
415 | return NULL; | |
416 | ||
417 | assert(rr->n_ref > 0); | |
418 | ||
419 | if (rr->n_ref > 1) { | |
420 | rr->n_ref--; | |
421 | return NULL; | |
422 | } | |
423 | ||
faa133f3 | 424 | if (rr->key) { |
9de3e329 | 425 | switch(rr->key->type) { |
9c92ce6d LP |
426 | |
427 | case DNS_TYPE_SRV: | |
428 | free(rr->srv.name); | |
429 | break; | |
430 | ||
9de3e329 ZJS |
431 | case DNS_TYPE_PTR: |
432 | case DNS_TYPE_NS: | |
433 | case DNS_TYPE_CNAME: | |
8ac4e9e1 | 434 | case DNS_TYPE_DNAME: |
faa133f3 | 435 | free(rr->ptr.name); |
9de3e329 | 436 | break; |
9c92ce6d | 437 | |
9de3e329 | 438 | case DNS_TYPE_HINFO: |
faa133f3 LP |
439 | free(rr->hinfo.cpu); |
440 | free(rr->hinfo.os); | |
9de3e329 | 441 | break; |
9c92ce6d | 442 | |
9de3e329 | 443 | case DNS_TYPE_TXT: |
9c92ce6d | 444 | case DNS_TYPE_SPF: |
2001c805 | 445 | dns_txt_item_free_all(rr->txt.items); |
9de3e329 | 446 | break; |
9c92ce6d | 447 | |
9de3e329 | 448 | case DNS_TYPE_SOA: |
7e8e0422 LP |
449 | free(rr->soa.mname); |
450 | free(rr->soa.rname); | |
9de3e329 | 451 | break; |
9c92ce6d | 452 | |
9de3e329 | 453 | case DNS_TYPE_MX: |
946c7094 | 454 | free(rr->mx.exchange); |
9de3e329 | 455 | break; |
9c92ce6d | 456 | |
abf126a3 TG |
457 | case DNS_TYPE_DS: |
458 | free(rr->ds.digest); | |
459 | break; | |
460 | ||
42cc2eeb | 461 | case DNS_TYPE_SSHFP: |
549c1a25 | 462 | free(rr->sshfp.fingerprint); |
42cc2eeb LP |
463 | break; |
464 | ||
8db0d2f5 ZJS |
465 | case DNS_TYPE_DNSKEY: |
466 | free(rr->dnskey.key); | |
467 | break; | |
468 | ||
151226ab ZJS |
469 | case DNS_TYPE_RRSIG: |
470 | free(rr->rrsig.signer); | |
471 | free(rr->rrsig.signature); | |
472 | break; | |
473 | ||
50f1e641 TG |
474 | case DNS_TYPE_NSEC: |
475 | free(rr->nsec.next_domain_name); | |
476 | bitmap_free(rr->nsec.types); | |
477 | break; | |
478 | ||
5d45a880 TG |
479 | case DNS_TYPE_NSEC3: |
480 | free(rr->nsec3.next_hashed_name); | |
481 | free(rr->nsec3.salt); | |
482 | bitmap_free(rr->nsec3.types); | |
483 | break; | |
484 | ||
0dae31d4 | 485 | case DNS_TYPE_LOC: |
9de3e329 ZJS |
486 | case DNS_TYPE_A: |
487 | case DNS_TYPE_AAAA: | |
488 | break; | |
9c92ce6d | 489 | |
48d45d2b ZJS |
490 | case DNS_TYPE_TLSA: |
491 | free(rr->tlsa.data); | |
492 | break; | |
493 | ||
d93a16b8 | 494 | case DNS_TYPE_OPENPGPKEY: |
9de3e329 | 495 | default: |
faa133f3 | 496 | free(rr->generic.data); |
9de3e329 | 497 | } |
322345fd | 498 | |
a8812dd7 | 499 | free(rr->wire_format); |
faa133f3 LP |
500 | dns_resource_key_unref(rr->key); |
501 | } | |
322345fd | 502 | |
7b50eb2e | 503 | free(rr->to_string); |
faa133f3 | 504 | free(rr); |
322345fd | 505 | |
322345fd LP |
506 | return NULL; |
507 | } | |
508 | ||
623a4c97 LP |
509 | int dns_resource_record_new_reverse(DnsResourceRecord **ret, int family, const union in_addr_union *address, const char *hostname) { |
510 | _cleanup_(dns_resource_key_unrefp) DnsResourceKey *key = NULL; | |
511 | _cleanup_(dns_resource_record_unrefp) DnsResourceRecord *rr = NULL; | |
512 | _cleanup_free_ char *ptr = NULL; | |
513 | int r; | |
514 | ||
515 | assert(ret); | |
516 | assert(address); | |
517 | assert(hostname); | |
518 | ||
519 | r = dns_name_reverse(family, address, &ptr); | |
520 | if (r < 0) | |
521 | return r; | |
522 | ||
523 | key = dns_resource_key_new_consume(DNS_CLASS_IN, DNS_TYPE_PTR, ptr); | |
524 | if (!key) | |
525 | return -ENOMEM; | |
526 | ||
527 | ptr = NULL; | |
528 | ||
529 | rr = dns_resource_record_new(key); | |
530 | if (!rr) | |
531 | return -ENOMEM; | |
532 | ||
533 | rr->ptr.name = strdup(hostname); | |
534 | if (!rr->ptr.name) | |
535 | return -ENOMEM; | |
536 | ||
537 | *ret = rr; | |
538 | rr = NULL; | |
539 | ||
540 | return 0; | |
541 | } | |
542 | ||
78c6a153 LP |
543 | int dns_resource_record_new_address(DnsResourceRecord **ret, int family, const union in_addr_union *address, const char *name) { |
544 | DnsResourceRecord *rr; | |
545 | ||
546 | assert(ret); | |
547 | assert(address); | |
548 | assert(family); | |
549 | ||
550 | if (family == AF_INET) { | |
551 | ||
552 | rr = dns_resource_record_new_full(DNS_CLASS_IN, DNS_TYPE_A, name); | |
553 | if (!rr) | |
554 | return -ENOMEM; | |
555 | ||
556 | rr->a.in_addr = address->in; | |
557 | ||
558 | } else if (family == AF_INET6) { | |
559 | ||
560 | rr = dns_resource_record_new_full(DNS_CLASS_IN, DNS_TYPE_AAAA, name); | |
561 | if (!rr) | |
562 | return -ENOMEM; | |
563 | ||
564 | rr->aaaa.in6_addr = address->in6; | |
565 | } else | |
566 | return -EAFNOSUPPORT; | |
567 | ||
568 | *ret = rr; | |
569 | ||
570 | return 0; | |
571 | } | |
572 | ||
322345fd LP |
573 | int dns_resource_record_equal(const DnsResourceRecord *a, const DnsResourceRecord *b) { |
574 | int r; | |
575 | ||
576 | assert(a); | |
577 | assert(b); | |
578 | ||
4d247a6c LP |
579 | if (a == b) |
580 | return 1; | |
581 | ||
faa133f3 | 582 | r = dns_resource_key_equal(a->key, b->key); |
322345fd LP |
583 | if (r <= 0) |
584 | return r; | |
585 | ||
fd0b4602 LP |
586 | if (a->unparseable != b->unparseable) |
587 | return 0; | |
588 | ||
589 | switch (a->unparseable ? _DNS_TYPE_INVALID : a->key->type) { | |
2d4c5cbc | 590 | |
9c92ce6d LP |
591 | case DNS_TYPE_SRV: |
592 | r = dns_name_equal(a->srv.name, b->srv.name); | |
593 | if (r <= 0) | |
594 | return r; | |
595 | ||
596 | return a->srv.priority == b->srv.priority && | |
597 | a->srv.weight == b->srv.weight && | |
598 | a->srv.port == b->srv.port; | |
599 | ||
2d4c5cbc LP |
600 | case DNS_TYPE_PTR: |
601 | case DNS_TYPE_NS: | |
602 | case DNS_TYPE_CNAME: | |
8ac4e9e1 | 603 | case DNS_TYPE_DNAME: |
322345fd | 604 | return dns_name_equal(a->ptr.name, b->ptr.name); |
2d4c5cbc LP |
605 | |
606 | case DNS_TYPE_HINFO: | |
607 | return strcaseeq(a->hinfo.cpu, b->hinfo.cpu) && | |
608 | strcaseeq(a->hinfo.os, b->hinfo.os); | |
609 | ||
9de3e329 | 610 | case DNS_TYPE_SPF: /* exactly the same as TXT */ |
0f84a72e | 611 | case DNS_TYPE_TXT: |
2001c805 | 612 | return dns_txt_item_equal(a->txt.items, b->txt.items); |
2e276efc | 613 | |
2d4c5cbc | 614 | case DNS_TYPE_A: |
322345fd | 615 | return memcmp(&a->a.in_addr, &b->a.in_addr, sizeof(struct in_addr)) == 0; |
2d4c5cbc LP |
616 | |
617 | case DNS_TYPE_AAAA: | |
322345fd | 618 | return memcmp(&a->aaaa.in6_addr, &b->aaaa.in6_addr, sizeof(struct in6_addr)) == 0; |
2d4c5cbc LP |
619 | |
620 | case DNS_TYPE_SOA: | |
7e8e0422 LP |
621 | r = dns_name_equal(a->soa.mname, b->soa.mname); |
622 | if (r <= 0) | |
623 | return r; | |
624 | r = dns_name_equal(a->soa.rname, b->soa.rname); | |
625 | if (r <= 0) | |
626 | return r; | |
627 | ||
628 | return a->soa.serial == b->soa.serial && | |
629 | a->soa.refresh == b->soa.refresh && | |
630 | a->soa.retry == b->soa.retry && | |
631 | a->soa.expire == b->soa.expire && | |
632 | a->soa.minimum == b->soa.minimum; | |
9c92ce6d | 633 | |
946c7094 ZJS |
634 | case DNS_TYPE_MX: |
635 | if (a->mx.priority != b->mx.priority) | |
636 | return 0; | |
637 | ||
638 | return dns_name_equal(a->mx.exchange, b->mx.exchange); | |
639 | ||
0dae31d4 ZJS |
640 | case DNS_TYPE_LOC: |
641 | assert(a->loc.version == b->loc.version); | |
642 | ||
643 | return a->loc.size == b->loc.size && | |
644 | a->loc.horiz_pre == b->loc.horiz_pre && | |
645 | a->loc.vert_pre == b->loc.vert_pre && | |
646 | a->loc.latitude == b->loc.latitude && | |
647 | a->loc.longitude == b->loc.longitude && | |
648 | a->loc.altitude == b->loc.altitude; | |
649 | ||
abf126a3 TG |
650 | case DNS_TYPE_DS: |
651 | return a->ds.key_tag == b->ds.key_tag && | |
652 | a->ds.algorithm == b->ds.algorithm && | |
653 | a->ds.digest_type == b->ds.digest_type && | |
654 | a->ds.digest_size == b->ds.digest_size && | |
655 | memcmp(a->ds.digest, b->ds.digest, a->ds.digest_size) == 0; | |
656 | ||
42cc2eeb LP |
657 | case DNS_TYPE_SSHFP: |
658 | return a->sshfp.algorithm == b->sshfp.algorithm && | |
659 | a->sshfp.fptype == b->sshfp.fptype && | |
549c1a25 TG |
660 | a->sshfp.fingerprint_size == b->sshfp.fingerprint_size && |
661 | memcmp(a->sshfp.fingerprint, b->sshfp.fingerprint, a->sshfp.fingerprint_size) == 0; | |
42cc2eeb | 662 | |
8db0d2f5 | 663 | case DNS_TYPE_DNSKEY: |
f91dc240 LP |
664 | return a->dnskey.flags == b->dnskey.flags && |
665 | a->dnskey.protocol == b->dnskey.protocol && | |
8db0d2f5 ZJS |
666 | a->dnskey.algorithm == b->dnskey.algorithm && |
667 | a->dnskey.key_size == b->dnskey.key_size && | |
668 | memcmp(a->dnskey.key, b->dnskey.key, a->dnskey.key_size) == 0; | |
669 | ||
151226ab ZJS |
670 | case DNS_TYPE_RRSIG: |
671 | /* do the fast comparisons first */ | |
03664a62 LN |
672 | if (a->rrsig.type_covered != b->rrsig.type_covered || |
673 | a->rrsig.algorithm != b->rrsig.algorithm || | |
674 | a->rrsig.labels != b->rrsig.labels || | |
675 | a->rrsig.original_ttl != b->rrsig.original_ttl || | |
676 | a->rrsig.expiration != b->rrsig.expiration || | |
677 | a->rrsig.inception != b->rrsig.inception || | |
678 | a->rrsig.key_tag != b->rrsig.key_tag || | |
151226ab ZJS |
679 | a->rrsig.signature_size != b->rrsig.signature_size || |
680 | memcmp(a->rrsig.signature, b->rrsig.signature, a->rrsig.signature_size) != 0) | |
681 | return false; | |
682 | ||
683 | return dns_name_equal(a->rrsig.signer, b->rrsig.signer); | |
684 | ||
50f1e641 TG |
685 | case DNS_TYPE_NSEC: |
686 | return dns_name_equal(a->nsec.next_domain_name, b->nsec.next_domain_name) && | |
687 | bitmap_equal(a->nsec.types, b->nsec.types); | |
688 | ||
5d45a880 TG |
689 | case DNS_TYPE_NSEC3: |
690 | return a->nsec3.algorithm == b->nsec3.algorithm && | |
691 | a->nsec3.flags == b->nsec3.flags && | |
692 | a->nsec3.iterations == b->nsec3.iterations && | |
693 | a->nsec3.salt_size == b->nsec3.salt_size && | |
694 | memcmp(a->nsec3.salt, b->nsec3.salt, a->nsec3.salt_size) == 0 && | |
695 | memcmp(a->nsec3.next_hashed_name, b->nsec3.next_hashed_name, a->nsec3.next_hashed_name_size) == 0 && | |
696 | bitmap_equal(a->nsec3.types, b->nsec3.types); | |
697 | ||
48d45d2b ZJS |
698 | case DNS_TYPE_TLSA: |
699 | return a->tlsa.cert_usage == b->tlsa.cert_usage && | |
700 | a->tlsa.selector == b->tlsa.selector && | |
701 | a->tlsa.matching_type == b->tlsa.matching_type && | |
702 | a->tlsa.data_size == b->tlsa.data_size && | |
703 | memcmp(a->tlsa.data, b->tlsa.data, a->tlsa.data_size) == 0; | |
704 | ||
2d4c5cbc | 705 | default: |
322345fd LP |
706 | return a->generic.size == b->generic.size && |
707 | memcmp(a->generic.data, b->generic.data, a->generic.size) == 0; | |
2d4c5cbc | 708 | } |
322345fd LP |
709 | } |
710 | ||
0dae31d4 ZJS |
711 | static char* format_location(uint32_t latitude, uint32_t longitude, uint32_t altitude, |
712 | uint8_t size, uint8_t horiz_pre, uint8_t vert_pre) { | |
713 | char *s; | |
714 | char NS = latitude >= 1U<<31 ? 'N' : 'S'; | |
715 | char EW = longitude >= 1U<<31 ? 'E' : 'W'; | |
716 | ||
717 | int lat = latitude >= 1U<<31 ? (int) (latitude - (1U<<31)) : (int) ((1U<<31) - latitude); | |
718 | int lon = longitude >= 1U<<31 ? (int) (longitude - (1U<<31)) : (int) ((1U<<31) - longitude); | |
719 | double alt = altitude >= 10000000u ? altitude - 10000000u : -(double)(10000000u - altitude); | |
720 | double siz = (size >> 4) * exp10((double) (size & 0xF)); | |
721 | double hor = (horiz_pre >> 4) * exp10((double) (horiz_pre & 0xF)); | |
722 | double ver = (vert_pre >> 4) * exp10((double) (vert_pre & 0xF)); | |
723 | ||
724 | if (asprintf(&s, "%d %d %.3f %c %d %d %.3f %c %.2fm %.2fm %.2fm %.2fm", | |
725 | (lat / 60000 / 60), | |
726 | (lat / 60000) % 60, | |
727 | (lat % 60000) / 1000., | |
728 | NS, | |
729 | (lon / 60000 / 60), | |
730 | (lon / 60000) % 60, | |
731 | (lon % 60000) / 1000., | |
732 | EW, | |
733 | alt / 100., | |
734 | siz / 100., | |
735 | hor / 100., | |
736 | ver / 100.) < 0) | |
737 | return NULL; | |
738 | ||
739 | return s; | |
740 | } | |
741 | ||
7c6423e1 TG |
742 | static int format_timestamp_dns(char *buf, size_t l, time_t sec) { |
743 | struct tm tm; | |
744 | ||
745 | assert(buf); | |
746 | assert(l > strlen("YYYYMMDDHHmmSS")); | |
747 | ||
748 | if (!gmtime_r(&sec, &tm)) | |
749 | return -EINVAL; | |
750 | ||
751 | if (strftime(buf, l, "%Y%m%d%H%M%S", &tm) <= 0) | |
752 | return -EINVAL; | |
753 | ||
754 | return 0; | |
755 | } | |
756 | ||
50f1e641 TG |
757 | static char *format_types(Bitmap *types) { |
758 | _cleanup_strv_free_ char **strv = NULL; | |
759 | _cleanup_free_ char *str = NULL; | |
cb57dd41 | 760 | Iterator i; |
50f1e641 TG |
761 | unsigned type; |
762 | int r; | |
763 | ||
cb57dd41 | 764 | BITMAP_FOREACH(type, types, i) { |
50f1e641 | 765 | if (dns_type_to_string(type)) { |
2c1fb4f7 | 766 | r = strv_extend(&strv, dns_type_to_string(type)); |
50f1e641 TG |
767 | if (r < 0) |
768 | return NULL; | |
769 | } else { | |
770 | char *t; | |
771 | ||
772 | r = asprintf(&t, "TYPE%u", type); | |
773 | if (r < 0) | |
774 | return NULL; | |
775 | ||
2c1fb4f7 | 776 | r = strv_consume(&strv, t); |
50f1e641 TG |
777 | if (r < 0) |
778 | return NULL; | |
779 | } | |
780 | } | |
781 | ||
782 | str = strv_join(strv, " "); | |
783 | if (!str) | |
784 | return NULL; | |
785 | ||
786 | return strjoin("( ", str, " )", NULL); | |
787 | } | |
788 | ||
2001c805 LP |
789 | static char *format_txt(DnsTxtItem *first) { |
790 | DnsTxtItem *i; | |
791 | size_t c = 1; | |
792 | char *p, *s; | |
793 | ||
794 | LIST_FOREACH(items, i, first) | |
795 | c += i->length * 4 + 3; | |
796 | ||
797 | p = s = new(char, c); | |
798 | if (!s) | |
799 | return NULL; | |
800 | ||
801 | LIST_FOREACH(items, i, first) { | |
802 | size_t j; | |
803 | ||
804 | if (i != first) | |
805 | *(p++) = ' '; | |
806 | ||
807 | *(p++) = '"'; | |
808 | ||
809 | for (j = 0; j < i->length; j++) { | |
810 | if (i->data[j] < ' ' || i->data[j] == '"' || i->data[j] >= 127) { | |
811 | *(p++) = '\\'; | |
812 | *(p++) = '0' + (i->data[j] / 100); | |
813 | *(p++) = '0' + ((i->data[j] / 10) % 10); | |
814 | *(p++) = '0' + (i->data[j] % 10); | |
815 | } else | |
816 | *(p++) = i->data[j]; | |
817 | } | |
818 | ||
819 | *(p++) = '"'; | |
820 | } | |
821 | ||
822 | *p = 0; | |
823 | return s; | |
824 | } | |
825 | ||
7b50eb2e | 826 | const char *dns_resource_record_to_string(DnsResourceRecord *rr) { |
8db0d2f5 | 827 | _cleanup_free_ char *k = NULL, *t = NULL; |
2d4c5cbc LP |
828 | char *s; |
829 | int r; | |
322345fd | 830 | |
2d4c5cbc | 831 | assert(rr); |
322345fd | 832 | |
7b50eb2e LP |
833 | if (rr->to_string) |
834 | return rr->to_string; | |
835 | ||
2d4c5cbc LP |
836 | r = dns_resource_key_to_string(rr->key, &k); |
837 | if (r < 0) | |
7b50eb2e | 838 | return NULL; |
322345fd | 839 | |
0dae31d4 | 840 | switch (rr->unparseable ? _DNS_TYPE_INVALID : rr->key->type) { |
322345fd | 841 | |
9c92ce6d LP |
842 | case DNS_TYPE_SRV: |
843 | r = asprintf(&s, "%s %u %u %u %s", | |
844 | k, | |
845 | rr->srv.priority, | |
846 | rr->srv.weight, | |
847 | rr->srv.port, | |
848 | strna(rr->srv.name)); | |
849 | if (r < 0) | |
7b50eb2e | 850 | return NULL; |
9c92ce6d LP |
851 | break; |
852 | ||
2d4c5cbc LP |
853 | case DNS_TYPE_PTR: |
854 | case DNS_TYPE_NS: | |
855 | case DNS_TYPE_CNAME: | |
8ac4e9e1 | 856 | case DNS_TYPE_DNAME: |
2d4c5cbc LP |
857 | s = strjoin(k, " ", rr->ptr.name, NULL); |
858 | if (!s) | |
7b50eb2e | 859 | return NULL; |
322345fd | 860 | |
2d4c5cbc | 861 | break; |
322345fd | 862 | |
2d4c5cbc LP |
863 | case DNS_TYPE_HINFO: |
864 | s = strjoin(k, " ", rr->hinfo.cpu, " ", rr->hinfo.os, NULL); | |
865 | if (!s) | |
7b50eb2e | 866 | return NULL; |
2d4c5cbc | 867 | break; |
322345fd | 868 | |
9de3e329 | 869 | case DNS_TYPE_SPF: /* exactly the same as TXT */ |
8db0d2f5 | 870 | case DNS_TYPE_TXT: |
2001c805 | 871 | t = format_txt(rr->txt.items); |
2e276efc | 872 | if (!t) |
7b50eb2e | 873 | return NULL; |
2e276efc ZJS |
874 | |
875 | s = strjoin(k, " ", t, NULL); | |
876 | if (!s) | |
7b50eb2e | 877 | return NULL; |
2e276efc | 878 | break; |
2e276efc | 879 | |
2d4c5cbc LP |
880 | case DNS_TYPE_A: { |
881 | _cleanup_free_ char *x = NULL; | |
322345fd | 882 | |
2d4c5cbc LP |
883 | r = in_addr_to_string(AF_INET, (const union in_addr_union*) &rr->a.in_addr, &x); |
884 | if (r < 0) | |
7b50eb2e | 885 | return NULL; |
322345fd | 886 | |
2d4c5cbc LP |
887 | s = strjoin(k, " ", x, NULL); |
888 | if (!s) | |
7b50eb2e | 889 | return NULL; |
2d4c5cbc LP |
890 | break; |
891 | } | |
322345fd | 892 | |
8db0d2f5 ZJS |
893 | case DNS_TYPE_AAAA: |
894 | r = in_addr_to_string(AF_INET6, (const union in_addr_union*) &rr->aaaa.in6_addr, &t); | |
2d4c5cbc | 895 | if (r < 0) |
7b50eb2e | 896 | return NULL; |
322345fd | 897 | |
8db0d2f5 | 898 | s = strjoin(k, " ", t, NULL); |
2d4c5cbc | 899 | if (!s) |
7b50eb2e | 900 | return NULL; |
2d4c5cbc | 901 | break; |
322345fd | 902 | |
2d4c5cbc LP |
903 | case DNS_TYPE_SOA: |
904 | r = asprintf(&s, "%s %s %s %u %u %u %u %u", | |
905 | k, | |
906 | strna(rr->soa.mname), | |
907 | strna(rr->soa.rname), | |
908 | rr->soa.serial, | |
909 | rr->soa.refresh, | |
910 | rr->soa.retry, | |
911 | rr->soa.expire, | |
912 | rr->soa.minimum); | |
913 | if (r < 0) | |
7b50eb2e | 914 | return NULL; |
2d4c5cbc LP |
915 | break; |
916 | ||
946c7094 ZJS |
917 | case DNS_TYPE_MX: |
918 | r = asprintf(&s, "%s %u %s", | |
919 | k, | |
920 | rr->mx.priority, | |
921 | rr->mx.exchange); | |
922 | if (r < 0) | |
7b50eb2e | 923 | return NULL; |
946c7094 ZJS |
924 | break; |
925 | ||
8db0d2f5 | 926 | case DNS_TYPE_LOC: |
0dae31d4 ZJS |
927 | assert(rr->loc.version == 0); |
928 | ||
8db0d2f5 ZJS |
929 | t = format_location(rr->loc.latitude, |
930 | rr->loc.longitude, | |
931 | rr->loc.altitude, | |
932 | rr->loc.size, | |
933 | rr->loc.horiz_pre, | |
934 | rr->loc.vert_pre); | |
935 | if (!t) | |
7b50eb2e | 936 | return NULL; |
0dae31d4 | 937 | |
8db0d2f5 | 938 | s = strjoin(k, " ", t, NULL); |
0dae31d4 | 939 | if (!s) |
7b50eb2e | 940 | return NULL; |
0dae31d4 | 941 | break; |
0dae31d4 | 942 | |
abf126a3 TG |
943 | case DNS_TYPE_DS: |
944 | t = hexmem(rr->ds.digest, rr->ds.digest_size); | |
945 | if (!t) | |
7b50eb2e | 946 | return NULL; |
abf126a3 TG |
947 | |
948 | r = asprintf(&s, "%s %u %u %u %s", | |
949 | k, | |
950 | rr->ds.key_tag, | |
951 | rr->ds.algorithm, | |
952 | rr->ds.digest_type, | |
953 | t); | |
954 | if (r < 0) | |
7b50eb2e | 955 | return NULL; |
abf126a3 TG |
956 | break; |
957 | ||
8db0d2f5 | 958 | case DNS_TYPE_SSHFP: |
549c1a25 | 959 | t = hexmem(rr->sshfp.fingerprint, rr->sshfp.fingerprint_size); |
8db0d2f5 | 960 | if (!t) |
7b50eb2e | 961 | return NULL; |
42cc2eeb LP |
962 | |
963 | r = asprintf(&s, "%s %u %u %s", | |
964 | k, | |
965 | rr->sshfp.algorithm, | |
966 | rr->sshfp.fptype, | |
8db0d2f5 | 967 | t); |
42cc2eeb | 968 | if (r < 0) |
7b50eb2e | 969 | return NULL; |
42cc2eeb | 970 | break; |
42cc2eeb | 971 | |
ff3d6560 | 972 | case DNS_TYPE_DNSKEY: { |
8e54f5d9 | 973 | _cleanup_free_ char *alg = NULL; |
d7671a3e | 974 | int n; |
ff3d6560 | 975 | |
8e54f5d9 LP |
976 | r = dnssec_algorithm_to_string_alloc(rr->dnskey.algorithm, &alg); |
977 | if (r < 0) | |
978 | return NULL; | |
ff3d6560 | 979 | |
d7671a3e | 980 | r = asprintf(&s, "%s %u %u %s %n", |
8db0d2f5 | 981 | k, |
f91dc240 LP |
982 | rr->dnskey.flags, |
983 | rr->dnskey.protocol, | |
8e54f5d9 | 984 | alg, |
d7671a3e | 985 | &n); |
8db0d2f5 | 986 | if (r < 0) |
7b50eb2e | 987 | return NULL; |
d7671a3e ZJS |
988 | |
989 | r = base64_append(&s, n, | |
990 | rr->dnskey.key, rr->dnskey.key_size, | |
991 | 8, columns()); | |
992 | if (r < 0) | |
993 | return NULL; | |
994 | ||
8db0d2f5 | 995 | break; |
ff3d6560 | 996 | } |
2d4c5cbc | 997 | |
151226ab | 998 | case DNS_TYPE_RRSIG: { |
8e54f5d9 | 999 | _cleanup_free_ char *alg = NULL; |
7c6423e1 | 1000 | char expiration[strlen("YYYYMMDDHHmmSS") + 1], inception[strlen("YYYYMMDDHHmmSS") + 1]; |
8e54f5d9 | 1001 | const char *type; |
d7671a3e | 1002 | int n; |
151226ab ZJS |
1003 | |
1004 | type = dns_type_to_string(rr->rrsig.type_covered); | |
8e54f5d9 LP |
1005 | |
1006 | r = dnssec_algorithm_to_string_alloc(rr->rrsig.algorithm, &alg); | |
1007 | if (r < 0) | |
1008 | return NULL; | |
151226ab | 1009 | |
7c6423e1 TG |
1010 | r = format_timestamp_dns(expiration, sizeof(expiration), rr->rrsig.expiration); |
1011 | if (r < 0) | |
7b50eb2e | 1012 | return NULL; |
7c6423e1 TG |
1013 | |
1014 | r = format_timestamp_dns(inception, sizeof(inception), rr->rrsig.inception); | |
1015 | if (r < 0) | |
7b50eb2e | 1016 | return NULL; |
7c6423e1 | 1017 | |
151226ab ZJS |
1018 | /* TYPE?? follows |
1019 | * http://tools.ietf.org/html/rfc3597#section-5 */ | |
1020 | ||
d7671a3e | 1021 | r = asprintf(&s, "%s %s%.*u %s %u %u %s %s %u %s %n", |
151226ab ZJS |
1022 | k, |
1023 | type ?: "TYPE", | |
1024 | type ? 0 : 1, type ? 0u : (unsigned) rr->rrsig.type_covered, | |
8e54f5d9 | 1025 | alg, |
151226ab ZJS |
1026 | rr->rrsig.labels, |
1027 | rr->rrsig.original_ttl, | |
7c6423e1 TG |
1028 | expiration, |
1029 | inception, | |
151226ab ZJS |
1030 | rr->rrsig.key_tag, |
1031 | rr->rrsig.signer, | |
d7671a3e | 1032 | &n); |
151226ab | 1033 | if (r < 0) |
7b50eb2e | 1034 | return NULL; |
d7671a3e ZJS |
1035 | |
1036 | r = base64_append(&s, n, | |
1037 | rr->rrsig.signature, rr->rrsig.signature_size, | |
1038 | 8, columns()); | |
1039 | if (r < 0) | |
1040 | return NULL; | |
1041 | ||
151226ab ZJS |
1042 | break; |
1043 | } | |
1044 | ||
50f1e641 TG |
1045 | case DNS_TYPE_NSEC: |
1046 | t = format_types(rr->nsec.types); | |
1047 | if (!t) | |
7b50eb2e | 1048 | return NULL; |
50f1e641 TG |
1049 | |
1050 | r = asprintf(&s, "%s %s %s", | |
1051 | k, | |
1052 | rr->nsec.next_domain_name, | |
1053 | t); | |
1054 | if (r < 0) | |
7b50eb2e | 1055 | return NULL; |
50f1e641 TG |
1056 | break; |
1057 | ||
5d45a880 TG |
1058 | case DNS_TYPE_NSEC3: { |
1059 | _cleanup_free_ char *salt = NULL, *hash = NULL; | |
1060 | ||
f5430a3e | 1061 | if (rr->nsec3.salt_size > 0) { |
5d45a880 TG |
1062 | salt = hexmem(rr->nsec3.salt, rr->nsec3.salt_size); |
1063 | if (!salt) | |
7b50eb2e | 1064 | return NULL; |
5d45a880 TG |
1065 | } |
1066 | ||
1067 | hash = base32hexmem(rr->nsec3.next_hashed_name, rr->nsec3.next_hashed_name_size, false); | |
1068 | if (!hash) | |
7b50eb2e | 1069 | return NULL; |
5d45a880 TG |
1070 | |
1071 | t = format_types(rr->nsec3.types); | |
1072 | if (!t) | |
7b50eb2e | 1073 | return NULL; |
5d45a880 TG |
1074 | |
1075 | r = asprintf(&s, "%s %"PRIu8" %"PRIu8" %"PRIu16" %s %s %s", | |
1076 | k, | |
1077 | rr->nsec3.algorithm, | |
1078 | rr->nsec3.flags, | |
1079 | rr->nsec3.iterations, | |
f5430a3e | 1080 | rr->nsec3.salt_size > 0 ? salt : "-", |
5d45a880 TG |
1081 | hash, |
1082 | t); | |
1083 | if (r < 0) | |
7b50eb2e | 1084 | return NULL; |
5d45a880 TG |
1085 | |
1086 | break; | |
1087 | } | |
1088 | ||
48d45d2b ZJS |
1089 | case DNS_TYPE_TLSA: { |
1090 | int n; | |
1091 | ||
1092 | r = asprintf(&s, "%s %u %u %u %n", | |
1093 | k, | |
1094 | rr->tlsa.cert_usage, | |
1095 | rr->tlsa.selector, | |
1096 | rr->tlsa.matching_type, | |
1097 | &n); | |
1098 | if (r < 0) | |
1099 | return NULL; | |
1100 | ||
1101 | r = base64_append(&s, n, | |
1102 | rr->tlsa.data, rr->tlsa.data_size, | |
1103 | 8, columns()); | |
1104 | if (r < 0) | |
1105 | return NULL; | |
1106 | break; | |
1107 | } | |
1108 | ||
d93a16b8 ZJS |
1109 | case DNS_TYPE_OPENPGPKEY: { |
1110 | int n; | |
1111 | ||
1112 | r = asprintf(&s, "%s %n", | |
1113 | k, | |
1114 | &n); | |
1115 | if (r < 0) | |
1116 | return NULL; | |
1117 | ||
1118 | r = base64_append(&s, n, | |
1119 | rr->generic.data, rr->generic.size, | |
1120 | 8, columns()); | |
1121 | if (r < 0) | |
1122 | return NULL; | |
1123 | break; | |
1124 | } | |
1125 | ||
8db0d2f5 ZJS |
1126 | default: |
1127 | t = hexmem(rr->generic.data, rr->generic.size); | |
1128 | if (!t) | |
7b50eb2e | 1129 | return NULL; |
8db0d2f5 | 1130 | |
6af47493 | 1131 | /* Format as documented in RFC 3597, Section 5 */ |
f5430a3e | 1132 | r = asprintf(&s, "%s \\# %zu %s", k, rr->generic.size, t); |
d23a27a9 | 1133 | if (r < 0) |
7b50eb2e | 1134 | return NULL; |
2d4c5cbc | 1135 | break; |
8db0d2f5 | 1136 | } |
2d4c5cbc | 1137 | |
7b50eb2e LP |
1138 | rr->to_string = s; |
1139 | return s; | |
2d4c5cbc | 1140 | } |
322345fd | 1141 | |
a8812dd7 LP |
1142 | int dns_resource_record_to_wire_format(DnsResourceRecord *rr, bool canonical) { |
1143 | ||
1144 | DnsPacket packet = { | |
1145 | .n_ref = 1, | |
1146 | .protocol = DNS_PROTOCOL_DNS, | |
1147 | .on_stack = true, | |
1148 | .refuse_compression = true, | |
1149 | .canonical_form = canonical, | |
1150 | }; | |
1151 | ||
1152 | size_t start, rds; | |
1153 | int r; | |
1154 | ||
1155 | assert(rr); | |
1156 | ||
1157 | /* Generates the RR in wire-format, optionally in the | |
1158 | * canonical form as discussed in the DNSSEC RFC 4034, Section | |
1159 | * 6.2. We allocate a throw-away DnsPacket object on the stack | |
1160 | * here, because we need some book-keeping for memory | |
1161 | * management, and can reuse the DnsPacket serializer, that | |
1162 | * can generate the canonical form, too, but also knows label | |
1163 | * compression and suchlike. */ | |
1164 | ||
1165 | if (rr->wire_format && rr->wire_format_canonical == canonical) | |
1166 | return 0; | |
1167 | ||
1168 | r = dns_packet_append_rr(&packet, rr, &start, &rds); | |
1169 | if (r < 0) | |
1170 | return r; | |
1171 | ||
1172 | assert(start == 0); | |
1173 | assert(packet._data); | |
1174 | ||
1175 | free(rr->wire_format); | |
1176 | rr->wire_format = packet._data; | |
1177 | rr->wire_format_size = packet.size; | |
1178 | rr->wire_format_rdata_offset = rds; | |
1179 | rr->wire_format_canonical = canonical; | |
1180 | ||
1181 | packet._data = NULL; | |
1182 | dns_packet_unref(&packet); | |
1183 | ||
1184 | return 0; | |
1185 | } | |
1186 | ||
97c67192 LP |
1187 | int dns_resource_record_signer(DnsResourceRecord *rr, const char **ret) { |
1188 | const char *n; | |
1189 | int r; | |
1190 | ||
1191 | assert(rr); | |
1192 | assert(ret); | |
1193 | ||
1194 | /* Returns the RRset's signer, if it is known. */ | |
1195 | ||
1196 | if (rr->n_skip_labels_signer == (unsigned) -1) | |
1197 | return -ENODATA; | |
1198 | ||
1199 | n = DNS_RESOURCE_KEY_NAME(rr->key); | |
1200 | r = dns_name_skip(n, rr->n_skip_labels_signer, &n); | |
1201 | if (r < 0) | |
1202 | return r; | |
1203 | if (r == 0) | |
1204 | return -EINVAL; | |
1205 | ||
1206 | *ret = n; | |
1207 | return 0; | |
1208 | } | |
1209 | ||
1210 | int dns_resource_record_source(DnsResourceRecord *rr, const char **ret) { | |
1211 | const char *n; | |
1212 | int r; | |
1213 | ||
1214 | assert(rr); | |
1215 | assert(ret); | |
1216 | ||
1217 | /* Returns the RRset's synthesizing source, if it is known. */ | |
1218 | ||
1219 | if (rr->n_skip_labels_source == (unsigned) -1) | |
1220 | return -ENODATA; | |
1221 | ||
1222 | n = DNS_RESOURCE_KEY_NAME(rr->key); | |
1223 | r = dns_name_skip(n, rr->n_skip_labels_source, &n); | |
1224 | if (r < 0) | |
1225 | return r; | |
1226 | if (r == 0) | |
1227 | return -EINVAL; | |
1228 | ||
1229 | *ret = n; | |
1230 | return 0; | |
1231 | } | |
1232 | ||
1233 | int dns_resource_record_is_signer(DnsResourceRecord *rr, const char *zone) { | |
1234 | const char *signer; | |
1235 | int r; | |
1236 | ||
ab481675 LP |
1237 | assert(rr); |
1238 | ||
97c67192 LP |
1239 | r = dns_resource_record_signer(rr, &signer); |
1240 | if (r < 0) | |
1241 | return r; | |
1242 | ||
1243 | return dns_name_equal(zone, signer); | |
1244 | } | |
1245 | ||
ab481675 LP |
1246 | int dns_resource_record_is_synthetic(DnsResourceRecord *rr) { |
1247 | int r; | |
1248 | ||
1249 | assert(rr); | |
1250 | ||
1251 | /* Returns > 0 if the RR is generated from a wildcard, and is not the asterisk name itself */ | |
1252 | ||
1253 | if (rr->n_skip_labels_source == (unsigned) -1) | |
1254 | return -ENODATA; | |
1255 | ||
1256 | if (rr->n_skip_labels_source == 0) | |
1257 | return 0; | |
1258 | ||
1259 | if (rr->n_skip_labels_source > 1) | |
1260 | return 1; | |
1261 | ||
1262 | r = dns_name_startswith(DNS_RESOURCE_KEY_NAME(rr->key), "*"); | |
1263 | if (r < 0) | |
1264 | return r; | |
1265 | ||
1266 | return !r; | |
1267 | } | |
1268 | ||
c9c72065 LP |
1269 | static void dns_resource_record_hash_func(const void *i, struct siphash *state) { |
1270 | const DnsResourceRecord *rr = i; | |
1271 | ||
1272 | assert(rr); | |
1273 | ||
1274 | dns_resource_key_hash_func(rr->key, state); | |
1275 | ||
1276 | switch (rr->unparseable ? _DNS_TYPE_INVALID : rr->key->type) { | |
1277 | ||
1278 | case DNS_TYPE_SRV: | |
1279 | siphash24_compress(&rr->srv.priority, sizeof(rr->srv.priority), state); | |
1280 | siphash24_compress(&rr->srv.weight, sizeof(rr->srv.weight), state); | |
1281 | siphash24_compress(&rr->srv.port, sizeof(rr->srv.port), state); | |
1282 | dns_name_hash_func(rr->srv.name, state); | |
1283 | break; | |
1284 | ||
1285 | case DNS_TYPE_PTR: | |
1286 | case DNS_TYPE_NS: | |
1287 | case DNS_TYPE_CNAME: | |
1288 | case DNS_TYPE_DNAME: | |
1289 | dns_name_hash_func(rr->ptr.name, state); | |
1290 | break; | |
1291 | ||
1292 | case DNS_TYPE_HINFO: | |
1293 | string_hash_func(rr->hinfo.cpu, state); | |
1294 | string_hash_func(rr->hinfo.os, state); | |
1295 | break; | |
1296 | ||
1297 | case DNS_TYPE_TXT: | |
1298 | case DNS_TYPE_SPF: { | |
1299 | DnsTxtItem *j; | |
1300 | ||
1301 | LIST_FOREACH(items, j, rr->txt.items) { | |
1302 | siphash24_compress(j->data, j->length, state); | |
1303 | ||
d5115566 LP |
1304 | /* Add an extra NUL byte, so that "a" followed by "b" doesn't result in the same hash as "ab" |
1305 | * followed by "". */ | |
1306 | siphash24_compress_byte(0, state); | |
c9c72065 LP |
1307 | } |
1308 | break; | |
1309 | } | |
1310 | ||
1311 | case DNS_TYPE_A: | |
1312 | siphash24_compress(&rr->a.in_addr, sizeof(rr->a.in_addr), state); | |
1313 | break; | |
1314 | ||
1315 | case DNS_TYPE_AAAA: | |
1316 | siphash24_compress(&rr->aaaa.in6_addr, sizeof(rr->aaaa.in6_addr), state); | |
1317 | break; | |
1318 | ||
1319 | case DNS_TYPE_SOA: | |
1320 | dns_name_hash_func(rr->soa.mname, state); | |
1321 | dns_name_hash_func(rr->soa.rname, state); | |
1322 | siphash24_compress(&rr->soa.serial, sizeof(rr->soa.serial), state); | |
1323 | siphash24_compress(&rr->soa.refresh, sizeof(rr->soa.refresh), state); | |
1324 | siphash24_compress(&rr->soa.retry, sizeof(rr->soa.retry), state); | |
1325 | siphash24_compress(&rr->soa.expire, sizeof(rr->soa.expire), state); | |
1326 | siphash24_compress(&rr->soa.minimum, sizeof(rr->soa.minimum), state); | |
1327 | break; | |
1328 | ||
1329 | case DNS_TYPE_MX: | |
1330 | siphash24_compress(&rr->mx.priority, sizeof(rr->mx.priority), state); | |
1331 | dns_name_hash_func(rr->mx.exchange, state); | |
1332 | break; | |
1333 | ||
1334 | case DNS_TYPE_LOC: | |
1335 | siphash24_compress(&rr->loc.version, sizeof(rr->loc.version), state); | |
1336 | siphash24_compress(&rr->loc.size, sizeof(rr->loc.size), state); | |
1337 | siphash24_compress(&rr->loc.horiz_pre, sizeof(rr->loc.horiz_pre), state); | |
1338 | siphash24_compress(&rr->loc.vert_pre, sizeof(rr->loc.vert_pre), state); | |
1339 | siphash24_compress(&rr->loc.latitude, sizeof(rr->loc.latitude), state); | |
1340 | siphash24_compress(&rr->loc.longitude, sizeof(rr->loc.longitude), state); | |
1341 | siphash24_compress(&rr->loc.altitude, sizeof(rr->loc.altitude), state); | |
1342 | break; | |
1343 | ||
1344 | case DNS_TYPE_SSHFP: | |
1345 | siphash24_compress(&rr->sshfp.algorithm, sizeof(rr->sshfp.algorithm), state); | |
1346 | siphash24_compress(&rr->sshfp.fptype, sizeof(rr->sshfp.fptype), state); | |
1347 | siphash24_compress(rr->sshfp.fingerprint, rr->sshfp.fingerprint_size, state); | |
1348 | break; | |
1349 | ||
1350 | case DNS_TYPE_DNSKEY: | |
1351 | siphash24_compress(&rr->dnskey.flags, sizeof(rr->dnskey.flags), state); | |
1352 | siphash24_compress(&rr->dnskey.protocol, sizeof(rr->dnskey.protocol), state); | |
1353 | siphash24_compress(&rr->dnskey.algorithm, sizeof(rr->dnskey.algorithm), state); | |
1354 | siphash24_compress(rr->dnskey.key, rr->dnskey.key_size, state); | |
1355 | break; | |
1356 | ||
1357 | case DNS_TYPE_RRSIG: | |
1358 | siphash24_compress(&rr->rrsig.type_covered, sizeof(rr->rrsig.type_covered), state); | |
1359 | siphash24_compress(&rr->rrsig.algorithm, sizeof(rr->rrsig.algorithm), state); | |
1360 | siphash24_compress(&rr->rrsig.labels, sizeof(rr->rrsig.labels), state); | |
1361 | siphash24_compress(&rr->rrsig.original_ttl, sizeof(rr->rrsig.original_ttl), state); | |
1362 | siphash24_compress(&rr->rrsig.expiration, sizeof(rr->rrsig.expiration), state); | |
1363 | siphash24_compress(&rr->rrsig.inception, sizeof(rr->rrsig.inception), state); | |
1364 | siphash24_compress(&rr->rrsig.key_tag, sizeof(rr->rrsig.key_tag), state); | |
1365 | dns_name_hash_func(rr->rrsig.signer, state); | |
1366 | siphash24_compress(rr->rrsig.signature, rr->rrsig.signature_size, state); | |
1367 | break; | |
1368 | ||
1369 | case DNS_TYPE_NSEC: | |
1370 | dns_name_hash_func(rr->nsec.next_domain_name, state); | |
1371 | /* FIXME: we leave out the type bitmap here. Hash | |
1372 | * would be better if we'd take it into account | |
1373 | * too. */ | |
1374 | break; | |
1375 | ||
1376 | case DNS_TYPE_DS: | |
1377 | siphash24_compress(&rr->ds.key_tag, sizeof(rr->ds.key_tag), state); | |
1378 | siphash24_compress(&rr->ds.algorithm, sizeof(rr->ds.algorithm), state); | |
1379 | siphash24_compress(&rr->ds.digest_type, sizeof(rr->ds.digest_type), state); | |
1380 | siphash24_compress(rr->ds.digest, rr->ds.digest_size, state); | |
1381 | break; | |
1382 | ||
1383 | case DNS_TYPE_NSEC3: | |
1384 | siphash24_compress(&rr->nsec3.algorithm, sizeof(rr->nsec3.algorithm), state); | |
1385 | siphash24_compress(&rr->nsec3.flags, sizeof(rr->nsec3.flags), state); | |
1386 | siphash24_compress(&rr->nsec3.iterations, sizeof(rr->nsec3.iterations), state); | |
1387 | siphash24_compress(rr->nsec3.salt, rr->nsec3.salt_size, state); | |
1388 | siphash24_compress(rr->nsec3.next_hashed_name, rr->nsec3.next_hashed_name_size, state); | |
1389 | /* FIXME: We leave the bitmaps out */ | |
1390 | break; | |
48d45d2b ZJS |
1391 | |
1392 | case DNS_TYPE_TLSA: | |
1393 | siphash24_compress(&rr->tlsa.cert_usage, sizeof(rr->tlsa.cert_usage), state); | |
1394 | siphash24_compress(&rr->tlsa.selector, sizeof(rr->tlsa.selector), state); | |
1395 | siphash24_compress(&rr->tlsa.matching_type, sizeof(rr->tlsa.matching_type), state); | |
1396 | siphash24_compress(&rr->tlsa.data, rr->tlsa.data_size, state); | |
1397 | break; | |
c9c72065 | 1398 | |
d93a16b8 | 1399 | case DNS_TYPE_OPENPGPKEY: |
c9c72065 LP |
1400 | default: |
1401 | siphash24_compress(rr->generic.data, rr->generic.size, state); | |
1402 | break; | |
1403 | } | |
1404 | } | |
1405 | ||
1406 | static int dns_resource_record_compare_func(const void *a, const void *b) { | |
1407 | const DnsResourceRecord *x = a, *y = b; | |
1408 | int ret; | |
1409 | ||
1410 | ret = dns_resource_key_compare_func(x->key, y->key); | |
1411 | if (ret != 0) | |
1412 | return ret; | |
1413 | ||
1414 | if (dns_resource_record_equal(x, y)) | |
1415 | return 0; | |
1416 | ||
1417 | /* This is a bit dirty, we don't implement proper odering, but | |
1418 | * the hashtable doesn't need ordering anyway, hence we don't | |
1419 | * care. */ | |
1420 | return x < y ? -1 : 1; | |
1421 | } | |
1422 | ||
1423 | const struct hash_ops dns_resource_record_hash_ops = { | |
1424 | .hash = dns_resource_record_hash_func, | |
1425 | .compare = dns_resource_record_compare_func, | |
1426 | }; | |
1427 | ||
2001c805 LP |
1428 | DnsTxtItem *dns_txt_item_free_all(DnsTxtItem *i) { |
1429 | DnsTxtItem *n; | |
1430 | ||
1431 | if (!i) | |
1432 | return NULL; | |
1433 | ||
1434 | n = i->items_next; | |
1435 | ||
1436 | free(i); | |
1437 | return dns_txt_item_free_all(n); | |
1438 | } | |
1439 | ||
1440 | bool dns_txt_item_equal(DnsTxtItem *a, DnsTxtItem *b) { | |
1441 | ||
4d247a6c LP |
1442 | if (a == b) |
1443 | return true; | |
1444 | ||
2001c805 LP |
1445 | if (!a != !b) |
1446 | return false; | |
1447 | ||
1448 | if (!a) | |
1449 | return true; | |
1450 | ||
1451 | if (a->length != b->length) | |
1452 | return false; | |
1453 | ||
1454 | if (memcmp(a->data, b->data, a->length) != 0) | |
1455 | return false; | |
1456 | ||
1457 | return dns_txt_item_equal(a->items_next, b->items_next); | |
1458 | } | |
8730bccf LP |
1459 | |
1460 | static const char* const dnssec_algorithm_table[_DNSSEC_ALGORITHM_MAX_DEFINED] = { | |
6f717d08 | 1461 | /* Mnemonics as listed on https://www.iana.org/assignments/dns-sec-alg-numbers/dns-sec-alg-numbers.xhtml */ |
8730bccf LP |
1462 | [DNSSEC_ALGORITHM_RSAMD5] = "RSAMD5", |
1463 | [DNSSEC_ALGORITHM_DH] = "DH", | |
1464 | [DNSSEC_ALGORITHM_DSA] = "DSA", | |
1465 | [DNSSEC_ALGORITHM_ECC] = "ECC", | |
1466 | [DNSSEC_ALGORITHM_RSASHA1] = "RSASHA1", | |
1467 | [DNSSEC_ALGORITHM_DSA_NSEC3_SHA1] = "DSA-NSEC3-SHA1", | |
1468 | [DNSSEC_ALGORITHM_RSASHA1_NSEC3_SHA1] = "RSASHA1-NSEC3-SHA1", | |
1469 | [DNSSEC_ALGORITHM_RSASHA256] = "RSASHA256", | |
1470 | [DNSSEC_ALGORITHM_RSASHA512] = "RSASHA512", | |
6f717d08 LP |
1471 | [DNSSEC_ALGORITHM_ECC_GOST] = "ECC-GOST", |
1472 | [DNSSEC_ALGORITHM_ECDSAP256SHA256] = "ECDSAP256SHA256", | |
1473 | [DNSSEC_ALGORITHM_ECDSAP384SHA384] = "ECDSAP384SHA384", | |
8730bccf LP |
1474 | [DNSSEC_ALGORITHM_INDIRECT] = "INDIRECT", |
1475 | [DNSSEC_ALGORITHM_PRIVATEDNS] = "PRIVATEDNS", | |
1476 | [DNSSEC_ALGORITHM_PRIVATEOID] = "PRIVATEOID", | |
1477 | }; | |
8e54f5d9 | 1478 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(dnssec_algorithm, int, 255); |
8730bccf LP |
1479 | |
1480 | static const char* const dnssec_digest_table[_DNSSEC_DIGEST_MAX_DEFINED] = { | |
6f717d08 LP |
1481 | /* Names as listed on https://www.iana.org/assignments/ds-rr-types/ds-rr-types.xhtml */ |
1482 | [DNSSEC_DIGEST_SHA1] = "SHA-1", | |
1483 | [DNSSEC_DIGEST_SHA256] = "SHA-256", | |
1484 | [DNSSEC_DIGEST_GOST_R_34_11_94] = "GOST_R_34.11-94", | |
1485 | [DNSSEC_DIGEST_SHA384] = "SHA-384", | |
8730bccf | 1486 | }; |
8e54f5d9 | 1487 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(dnssec_digest, int, 255); |