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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" |
07630cea LP |
30 | #include "string-util.h" |
31 | #include "strv.h" | |
74b2466e | 32 | |
faa133f3 LP |
33 | DnsResourceKey* dns_resource_key_new(uint16_t class, uint16_t type, const char *name) { |
34 | DnsResourceKey *k; | |
35 | size_t l; | |
74b2466e | 36 | |
faa133f3 LP |
37 | assert(name); |
38 | ||
39 | l = strlen(name); | |
40 | k = malloc0(sizeof(DnsResourceKey) + l + 1); | |
41 | if (!k) | |
42 | return NULL; | |
43 | ||
44 | k->n_ref = 1; | |
45 | k->class = class; | |
46 | k->type = type; | |
47 | ||
48 | strcpy((char*) k + sizeof(DnsResourceKey), name); | |
49 | ||
50 | return k; | |
51 | } | |
52 | ||
7c1ff6ac TG |
53 | DnsResourceKey* dns_resource_key_new_cname(const DnsResourceKey *key) { |
54 | assert(key); | |
55 | ||
56 | return dns_resource_key_new(key->class, DNS_TYPE_CNAME, DNS_RESOURCE_KEY_NAME(key)); | |
57 | } | |
58 | ||
36d9205d | 59 | DnsResourceKey* dns_resource_key_new_redirect(const DnsResourceKey *key, const DnsResourceRecord *cname) { |
58db254a LP |
60 | int r; |
61 | ||
36d9205d TG |
62 | assert(key); |
63 | assert(cname); | |
64 | ||
58db254a LP |
65 | assert(IN_SET(cname->key->type, DNS_TYPE_CNAME, DNS_TYPE_DNAME)); |
66 | ||
67 | if (cname->key->type == DNS_TYPE_CNAME) | |
68 | return dns_resource_key_new(key->class, key->type, cname->cname.name); | |
69 | else { | |
70 | DnsResourceKey *k; | |
71 | char *destination = NULL; | |
72 | ||
73 | r = dns_name_change_suffix(DNS_RESOURCE_KEY_NAME(key), DNS_RESOURCE_KEY_NAME(cname->key), cname->dname.name, &destination); | |
74 | if (r < 0) | |
75 | return NULL; | |
76 | if (r == 0) | |
77 | return dns_resource_key_ref((DnsResourceKey*) key); | |
78 | ||
79 | k = dns_resource_key_new_consume(key->class, key->type, destination); | |
80 | if (!k) { | |
81 | free(destination); | |
82 | return NULL; | |
83 | } | |
84 | ||
85 | return k; | |
86 | } | |
36d9205d TG |
87 | } |
88 | ||
801ad6a6 LP |
89 | int dns_resource_key_new_append_suffix(DnsResourceKey **ret, DnsResourceKey *key, char *name) { |
90 | DnsResourceKey *new_key; | |
91 | char *joined; | |
92 | int r; | |
93 | ||
94 | assert(ret); | |
95 | assert(key); | |
96 | assert(name); | |
97 | ||
98 | r = dns_name_root(name); | |
99 | if (r < 0) | |
100 | return r; | |
101 | if (r > 0) { | |
102 | *ret = dns_resource_key_ref(key); | |
103 | return 0; | |
104 | } | |
105 | ||
106 | r = dns_name_concat(DNS_RESOURCE_KEY_NAME(key), name, &joined); | |
107 | if (r < 0) | |
108 | return r; | |
109 | ||
110 | new_key = dns_resource_key_new_consume(key->class, key->type, joined); | |
111 | if (!new_key) { | |
112 | free(joined); | |
113 | return -ENOMEM; | |
114 | } | |
115 | ||
116 | *ret = new_key; | |
117 | return 0; | |
118 | } | |
119 | ||
faa133f3 LP |
120 | DnsResourceKey* dns_resource_key_new_consume(uint16_t class, uint16_t type, char *name) { |
121 | DnsResourceKey *k; | |
122 | ||
123 | assert(name); | |
124 | ||
125 | k = new0(DnsResourceKey, 1); | |
126 | if (!k) | |
127 | return NULL; | |
128 | ||
129 | k->n_ref = 1; | |
130 | k->class = class; | |
131 | k->type = type; | |
132 | k->_name = name; | |
133 | ||
134 | return k; | |
135 | } | |
136 | ||
137 | DnsResourceKey* dns_resource_key_ref(DnsResourceKey *k) { | |
138 | ||
139 | if (!k) | |
140 | return NULL; | |
141 | ||
142 | assert(k->n_ref > 0); | |
143 | k->n_ref++; | |
144 | ||
145 | return k; | |
146 | } | |
147 | ||
148 | DnsResourceKey* dns_resource_key_unref(DnsResourceKey *k) { | |
149 | if (!k) | |
150 | return NULL; | |
151 | ||
152 | assert(k->n_ref > 0); | |
153 | ||
154 | if (k->n_ref == 1) { | |
155 | free(k->_name); | |
156 | free(k); | |
157 | } else | |
158 | k->n_ref--; | |
159 | ||
160 | return NULL; | |
161 | } | |
162 | ||
163 | int dns_resource_key_equal(const DnsResourceKey *a, const DnsResourceKey *b) { | |
164 | int r; | |
165 | ||
166 | r = dns_name_equal(DNS_RESOURCE_KEY_NAME(a), DNS_RESOURCE_KEY_NAME(b)); | |
167 | if (r <= 0) | |
168 | return r; | |
169 | ||
170 | if (a->class != b->class) | |
171 | return 0; | |
172 | ||
173 | if (a->type != b->type) | |
174 | return 0; | |
175 | ||
176 | return 1; | |
177 | } | |
178 | ||
801ad6a6 LP |
179 | int dns_resource_key_match_rr(const DnsResourceKey *key, const DnsResourceRecord *rr, const char *search_domain) { |
180 | int r; | |
181 | ||
faa133f3 LP |
182 | assert(key); |
183 | assert(rr); | |
184 | ||
801ad6a6 LP |
185 | /* Checks if an rr matches the specified key. If a search |
186 | * domain is specified, it will also be checked if the key | |
187 | * with the search domain suffixed might match the RR. */ | |
188 | ||
faa133f3 LP |
189 | if (rr->key->class != key->class && key->class != DNS_CLASS_ANY) |
190 | return 0; | |
191 | ||
192 | if (rr->key->type != key->type && key->type != DNS_TYPE_ANY) | |
193 | return 0; | |
194 | ||
801ad6a6 LP |
195 | r = dns_name_equal(DNS_RESOURCE_KEY_NAME(rr->key), DNS_RESOURCE_KEY_NAME(key)); |
196 | if (r != 0) | |
197 | return r; | |
198 | ||
199 | if (search_domain) { | |
200 | _cleanup_free_ char *joined = NULL; | |
201 | ||
202 | r = dns_name_concat(DNS_RESOURCE_KEY_NAME(key), search_domain, &joined); | |
203 | if (r < 0) | |
204 | return r; | |
205 | ||
206 | return dns_name_equal(DNS_RESOURCE_KEY_NAME(rr->key), joined); | |
207 | } | |
208 | ||
209 | return 0; | |
faa133f3 LP |
210 | } |
211 | ||
801ad6a6 LP |
212 | int dns_resource_key_match_cname(const DnsResourceKey *key, const DnsResourceRecord *rr, const char *search_domain) { |
213 | int r; | |
214 | ||
faa133f3 LP |
215 | assert(key); |
216 | assert(rr); | |
217 | ||
218 | if (rr->key->class != key->class && key->class != DNS_CLASS_ANY) | |
219 | return 0; | |
220 | ||
58db254a | 221 | if (rr->key->type == DNS_TYPE_CNAME) |
801ad6a6 | 222 | r = dns_name_equal(DNS_RESOURCE_KEY_NAME(key), DNS_RESOURCE_KEY_NAME(rr->key)); |
58db254a | 223 | else if (rr->key->type == DNS_TYPE_DNAME) |
801ad6a6 | 224 | r = dns_name_endswith(DNS_RESOURCE_KEY_NAME(key), DNS_RESOURCE_KEY_NAME(rr->key)); |
58db254a | 225 | else |
faa133f3 | 226 | return 0; |
801ad6a6 LP |
227 | |
228 | if (r != 0) | |
229 | return r; | |
230 | ||
231 | if (search_domain) { | |
232 | _cleanup_free_ char *joined = NULL; | |
233 | ||
234 | r = dns_name_concat(DNS_RESOURCE_KEY_NAME(key), search_domain, &joined); | |
235 | if (r < 0) | |
236 | return r; | |
237 | ||
238 | if (rr->key->type == DNS_TYPE_CNAME) | |
239 | return dns_name_equal(joined, DNS_RESOURCE_KEY_NAME(rr->key)); | |
240 | else if (rr->key->type == DNS_TYPE_DNAME) | |
241 | return dns_name_endswith(joined, DNS_RESOURCE_KEY_NAME(rr->key)); | |
242 | } | |
243 | ||
244 | return 0; | |
245 | ||
74b2466e LP |
246 | } |
247 | ||
b826ab58 | 248 | static void dns_resource_key_hash_func(const void *i, struct siphash *state) { |
322345fd | 249 | const DnsResourceKey *k = i; |
322345fd | 250 | |
b826ab58 | 251 | assert(k); |
322345fd | 252 | |
b826ab58 TG |
253 | dns_name_hash_func(DNS_RESOURCE_KEY_NAME(k), state); |
254 | siphash24_compress(&k->class, sizeof(k->class), state); | |
255 | siphash24_compress(&k->type, sizeof(k->type), state); | |
322345fd LP |
256 | } |
257 | ||
d5099efc | 258 | static int dns_resource_key_compare_func(const void *a, const void *b) { |
322345fd LP |
259 | const DnsResourceKey *x = a, *y = b; |
260 | int ret; | |
261 | ||
faa133f3 | 262 | ret = dns_name_compare_func(DNS_RESOURCE_KEY_NAME(x), DNS_RESOURCE_KEY_NAME(y)); |
322345fd LP |
263 | if (ret != 0) |
264 | return ret; | |
265 | ||
266 | if (x->type < y->type) | |
267 | return -1; | |
268 | if (x->type > y->type) | |
269 | return 1; | |
270 | ||
271 | if (x->class < y->class) | |
272 | return -1; | |
273 | if (x->class > y->class) | |
274 | return 1; | |
275 | ||
276 | return 0; | |
277 | } | |
278 | ||
d5099efc MS |
279 | const struct hash_ops dns_resource_key_hash_ops = { |
280 | .hash = dns_resource_key_hash_func, | |
281 | .compare = dns_resource_key_compare_func | |
282 | }; | |
283 | ||
2d4c5cbc | 284 | int dns_resource_key_to_string(const DnsResourceKey *key, char **ret) { |
d23a27a9 | 285 | char cbuf[strlen("CLASS") + DECIMAL_STR_MAX(uint16_t)], tbuf[strlen("TYPE") + DECIMAL_STR_MAX(uint16_t)]; |
2d4c5cbc LP |
286 | const char *c, *t; |
287 | char *s; | |
288 | ||
289 | c = dns_class_to_string(key->class); | |
290 | if (!c) { | |
d23a27a9 | 291 | sprintf(cbuf, "CLASS%u", key->class); |
2d4c5cbc LP |
292 | c = cbuf; |
293 | } | |
294 | ||
295 | t = dns_type_to_string(key->type); | |
296 | if (!t){ | |
d23a27a9 | 297 | sprintf(tbuf, "TYPE%u", key->type); |
2d4c5cbc LP |
298 | t = tbuf; |
299 | } | |
300 | ||
23432a1c | 301 | if (asprintf(&s, "%s %s %-5s", DNS_RESOURCE_KEY_NAME(key), c, t) < 0) |
2d4c5cbc LP |
302 | return -ENOMEM; |
303 | ||
304 | *ret = s; | |
305 | return 0; | |
306 | } | |
307 | ||
faa133f3 | 308 | DnsResourceRecord* dns_resource_record_new(DnsResourceKey *key) { |
74b2466e LP |
309 | DnsResourceRecord *rr; |
310 | ||
311 | rr = new0(DnsResourceRecord, 1); | |
312 | if (!rr) | |
313 | return NULL; | |
314 | ||
315 | rr->n_ref = 1; | |
faa133f3 LP |
316 | rr->key = dns_resource_key_ref(key); |
317 | ||
74b2466e LP |
318 | return rr; |
319 | } | |
320 | ||
8bf52d3d LP |
321 | DnsResourceRecord* dns_resource_record_new_full(uint16_t class, uint16_t type, const char *name) { |
322 | _cleanup_(dns_resource_key_unrefp) DnsResourceKey *key = NULL; | |
323 | ||
324 | key = dns_resource_key_new(class, type, name); | |
325 | if (!key) | |
326 | return NULL; | |
327 | ||
328 | return dns_resource_record_new(key); | |
329 | } | |
330 | ||
74b2466e LP |
331 | DnsResourceRecord* dns_resource_record_ref(DnsResourceRecord *rr) { |
332 | if (!rr) | |
333 | return NULL; | |
334 | ||
335 | assert(rr->n_ref > 0); | |
336 | rr->n_ref++; | |
337 | ||
338 | return rr; | |
339 | } | |
340 | ||
341 | DnsResourceRecord* dns_resource_record_unref(DnsResourceRecord *rr) { | |
342 | if (!rr) | |
343 | return NULL; | |
344 | ||
345 | assert(rr->n_ref > 0); | |
346 | ||
347 | if (rr->n_ref > 1) { | |
348 | rr->n_ref--; | |
349 | return NULL; | |
350 | } | |
351 | ||
faa133f3 | 352 | if (rr->key) { |
9de3e329 | 353 | switch(rr->key->type) { |
9c92ce6d LP |
354 | |
355 | case DNS_TYPE_SRV: | |
356 | free(rr->srv.name); | |
357 | break; | |
358 | ||
9de3e329 ZJS |
359 | case DNS_TYPE_PTR: |
360 | case DNS_TYPE_NS: | |
361 | case DNS_TYPE_CNAME: | |
8ac4e9e1 | 362 | case DNS_TYPE_DNAME: |
faa133f3 | 363 | free(rr->ptr.name); |
9de3e329 | 364 | break; |
9c92ce6d | 365 | |
9de3e329 | 366 | case DNS_TYPE_HINFO: |
faa133f3 LP |
367 | free(rr->hinfo.cpu); |
368 | free(rr->hinfo.os); | |
9de3e329 | 369 | break; |
9c92ce6d | 370 | |
9de3e329 | 371 | case DNS_TYPE_TXT: |
9c92ce6d | 372 | case DNS_TYPE_SPF: |
2001c805 | 373 | dns_txt_item_free_all(rr->txt.items); |
9de3e329 | 374 | break; |
9c92ce6d | 375 | |
9de3e329 | 376 | case DNS_TYPE_SOA: |
7e8e0422 LP |
377 | free(rr->soa.mname); |
378 | free(rr->soa.rname); | |
9de3e329 | 379 | break; |
9c92ce6d | 380 | |
9de3e329 | 381 | case DNS_TYPE_MX: |
946c7094 | 382 | free(rr->mx.exchange); |
9de3e329 | 383 | break; |
9c92ce6d | 384 | |
abf126a3 TG |
385 | case DNS_TYPE_DS: |
386 | free(rr->ds.digest); | |
387 | break; | |
388 | ||
42cc2eeb | 389 | case DNS_TYPE_SSHFP: |
549c1a25 | 390 | free(rr->sshfp.fingerprint); |
42cc2eeb LP |
391 | break; |
392 | ||
8db0d2f5 ZJS |
393 | case DNS_TYPE_DNSKEY: |
394 | free(rr->dnskey.key); | |
395 | break; | |
396 | ||
151226ab ZJS |
397 | case DNS_TYPE_RRSIG: |
398 | free(rr->rrsig.signer); | |
399 | free(rr->rrsig.signature); | |
400 | break; | |
401 | ||
50f1e641 TG |
402 | case DNS_TYPE_NSEC: |
403 | free(rr->nsec.next_domain_name); | |
404 | bitmap_free(rr->nsec.types); | |
405 | break; | |
406 | ||
5d45a880 TG |
407 | case DNS_TYPE_NSEC3: |
408 | free(rr->nsec3.next_hashed_name); | |
409 | free(rr->nsec3.salt); | |
410 | bitmap_free(rr->nsec3.types); | |
411 | break; | |
412 | ||
0dae31d4 | 413 | case DNS_TYPE_LOC: |
9de3e329 ZJS |
414 | case DNS_TYPE_A: |
415 | case DNS_TYPE_AAAA: | |
416 | break; | |
9c92ce6d | 417 | |
9de3e329 | 418 | default: |
faa133f3 | 419 | free(rr->generic.data); |
9de3e329 | 420 | } |
322345fd | 421 | |
faa133f3 LP |
422 | dns_resource_key_unref(rr->key); |
423 | } | |
322345fd | 424 | |
faa133f3 | 425 | free(rr); |
322345fd | 426 | |
322345fd LP |
427 | return NULL; |
428 | } | |
429 | ||
623a4c97 LP |
430 | int dns_resource_record_new_reverse(DnsResourceRecord **ret, int family, const union in_addr_union *address, const char *hostname) { |
431 | _cleanup_(dns_resource_key_unrefp) DnsResourceKey *key = NULL; | |
432 | _cleanup_(dns_resource_record_unrefp) DnsResourceRecord *rr = NULL; | |
433 | _cleanup_free_ char *ptr = NULL; | |
434 | int r; | |
435 | ||
436 | assert(ret); | |
437 | assert(address); | |
438 | assert(hostname); | |
439 | ||
440 | r = dns_name_reverse(family, address, &ptr); | |
441 | if (r < 0) | |
442 | return r; | |
443 | ||
444 | key = dns_resource_key_new_consume(DNS_CLASS_IN, DNS_TYPE_PTR, ptr); | |
445 | if (!key) | |
446 | return -ENOMEM; | |
447 | ||
448 | ptr = NULL; | |
449 | ||
450 | rr = dns_resource_record_new(key); | |
451 | if (!rr) | |
452 | return -ENOMEM; | |
453 | ||
454 | rr->ptr.name = strdup(hostname); | |
455 | if (!rr->ptr.name) | |
456 | return -ENOMEM; | |
457 | ||
458 | *ret = rr; | |
459 | rr = NULL; | |
460 | ||
461 | return 0; | |
462 | } | |
463 | ||
78c6a153 LP |
464 | int dns_resource_record_new_address(DnsResourceRecord **ret, int family, const union in_addr_union *address, const char *name) { |
465 | DnsResourceRecord *rr; | |
466 | ||
467 | assert(ret); | |
468 | assert(address); | |
469 | assert(family); | |
470 | ||
471 | if (family == AF_INET) { | |
472 | ||
473 | rr = dns_resource_record_new_full(DNS_CLASS_IN, DNS_TYPE_A, name); | |
474 | if (!rr) | |
475 | return -ENOMEM; | |
476 | ||
477 | rr->a.in_addr = address->in; | |
478 | ||
479 | } else if (family == AF_INET6) { | |
480 | ||
481 | rr = dns_resource_record_new_full(DNS_CLASS_IN, DNS_TYPE_AAAA, name); | |
482 | if (!rr) | |
483 | return -ENOMEM; | |
484 | ||
485 | rr->aaaa.in6_addr = address->in6; | |
486 | } else | |
487 | return -EAFNOSUPPORT; | |
488 | ||
489 | *ret = rr; | |
490 | ||
491 | return 0; | |
492 | } | |
493 | ||
322345fd LP |
494 | int dns_resource_record_equal(const DnsResourceRecord *a, const DnsResourceRecord *b) { |
495 | int r; | |
496 | ||
497 | assert(a); | |
498 | assert(b); | |
499 | ||
faa133f3 | 500 | r = dns_resource_key_equal(a->key, b->key); |
322345fd LP |
501 | if (r <= 0) |
502 | return r; | |
503 | ||
fd0b4602 LP |
504 | if (a->unparseable != b->unparseable) |
505 | return 0; | |
506 | ||
507 | switch (a->unparseable ? _DNS_TYPE_INVALID : a->key->type) { | |
2d4c5cbc | 508 | |
9c92ce6d LP |
509 | case DNS_TYPE_SRV: |
510 | r = dns_name_equal(a->srv.name, b->srv.name); | |
511 | if (r <= 0) | |
512 | return r; | |
513 | ||
514 | return a->srv.priority == b->srv.priority && | |
515 | a->srv.weight == b->srv.weight && | |
516 | a->srv.port == b->srv.port; | |
517 | ||
2d4c5cbc LP |
518 | case DNS_TYPE_PTR: |
519 | case DNS_TYPE_NS: | |
520 | case DNS_TYPE_CNAME: | |
8ac4e9e1 | 521 | case DNS_TYPE_DNAME: |
322345fd | 522 | return dns_name_equal(a->ptr.name, b->ptr.name); |
2d4c5cbc LP |
523 | |
524 | case DNS_TYPE_HINFO: | |
525 | return strcaseeq(a->hinfo.cpu, b->hinfo.cpu) && | |
526 | strcaseeq(a->hinfo.os, b->hinfo.os); | |
527 | ||
9de3e329 | 528 | case DNS_TYPE_SPF: /* exactly the same as TXT */ |
0f84a72e | 529 | case DNS_TYPE_TXT: |
2001c805 | 530 | return dns_txt_item_equal(a->txt.items, b->txt.items); |
2e276efc | 531 | |
2d4c5cbc | 532 | case DNS_TYPE_A: |
322345fd | 533 | return memcmp(&a->a.in_addr, &b->a.in_addr, sizeof(struct in_addr)) == 0; |
2d4c5cbc LP |
534 | |
535 | case DNS_TYPE_AAAA: | |
322345fd | 536 | return memcmp(&a->aaaa.in6_addr, &b->aaaa.in6_addr, sizeof(struct in6_addr)) == 0; |
2d4c5cbc LP |
537 | |
538 | case DNS_TYPE_SOA: | |
7e8e0422 LP |
539 | r = dns_name_equal(a->soa.mname, b->soa.mname); |
540 | if (r <= 0) | |
541 | return r; | |
542 | r = dns_name_equal(a->soa.rname, b->soa.rname); | |
543 | if (r <= 0) | |
544 | return r; | |
545 | ||
546 | return a->soa.serial == b->soa.serial && | |
547 | a->soa.refresh == b->soa.refresh && | |
548 | a->soa.retry == b->soa.retry && | |
549 | a->soa.expire == b->soa.expire && | |
550 | a->soa.minimum == b->soa.minimum; | |
9c92ce6d | 551 | |
946c7094 ZJS |
552 | case DNS_TYPE_MX: |
553 | if (a->mx.priority != b->mx.priority) | |
554 | return 0; | |
555 | ||
556 | return dns_name_equal(a->mx.exchange, b->mx.exchange); | |
557 | ||
0dae31d4 ZJS |
558 | case DNS_TYPE_LOC: |
559 | assert(a->loc.version == b->loc.version); | |
560 | ||
561 | return a->loc.size == b->loc.size && | |
562 | a->loc.horiz_pre == b->loc.horiz_pre && | |
563 | a->loc.vert_pre == b->loc.vert_pre && | |
564 | a->loc.latitude == b->loc.latitude && | |
565 | a->loc.longitude == b->loc.longitude && | |
566 | a->loc.altitude == b->loc.altitude; | |
567 | ||
abf126a3 TG |
568 | case DNS_TYPE_DS: |
569 | return a->ds.key_tag == b->ds.key_tag && | |
570 | a->ds.algorithm == b->ds.algorithm && | |
571 | a->ds.digest_type == b->ds.digest_type && | |
572 | a->ds.digest_size == b->ds.digest_size && | |
573 | memcmp(a->ds.digest, b->ds.digest, a->ds.digest_size) == 0; | |
574 | ||
42cc2eeb LP |
575 | case DNS_TYPE_SSHFP: |
576 | return a->sshfp.algorithm == b->sshfp.algorithm && | |
577 | a->sshfp.fptype == b->sshfp.fptype && | |
549c1a25 TG |
578 | a->sshfp.fingerprint_size == b->sshfp.fingerprint_size && |
579 | memcmp(a->sshfp.fingerprint, b->sshfp.fingerprint, a->sshfp.fingerprint_size) == 0; | |
42cc2eeb | 580 | |
8db0d2f5 ZJS |
581 | case DNS_TYPE_DNSKEY: |
582 | return a->dnskey.zone_key_flag == b->dnskey.zone_key_flag && | |
583 | a->dnskey.sep_flag == b->dnskey.sep_flag && | |
584 | a->dnskey.algorithm == b->dnskey.algorithm && | |
585 | a->dnskey.key_size == b->dnskey.key_size && | |
586 | memcmp(a->dnskey.key, b->dnskey.key, a->dnskey.key_size) == 0; | |
587 | ||
151226ab ZJS |
588 | case DNS_TYPE_RRSIG: |
589 | /* do the fast comparisons first */ | |
03664a62 LN |
590 | if (a->rrsig.type_covered != b->rrsig.type_covered || |
591 | a->rrsig.algorithm != b->rrsig.algorithm || | |
592 | a->rrsig.labels != b->rrsig.labels || | |
593 | a->rrsig.original_ttl != b->rrsig.original_ttl || | |
594 | a->rrsig.expiration != b->rrsig.expiration || | |
595 | a->rrsig.inception != b->rrsig.inception || | |
596 | a->rrsig.key_tag != b->rrsig.key_tag || | |
151226ab ZJS |
597 | a->rrsig.signature_size != b->rrsig.signature_size || |
598 | memcmp(a->rrsig.signature, b->rrsig.signature, a->rrsig.signature_size) != 0) | |
599 | return false; | |
600 | ||
601 | return dns_name_equal(a->rrsig.signer, b->rrsig.signer); | |
602 | ||
50f1e641 TG |
603 | case DNS_TYPE_NSEC: |
604 | return dns_name_equal(a->nsec.next_domain_name, b->nsec.next_domain_name) && | |
605 | bitmap_equal(a->nsec.types, b->nsec.types); | |
606 | ||
5d45a880 TG |
607 | case DNS_TYPE_NSEC3: |
608 | return a->nsec3.algorithm == b->nsec3.algorithm && | |
609 | a->nsec3.flags == b->nsec3.flags && | |
610 | a->nsec3.iterations == b->nsec3.iterations && | |
611 | a->nsec3.salt_size == b->nsec3.salt_size && | |
612 | memcmp(a->nsec3.salt, b->nsec3.salt, a->nsec3.salt_size) == 0 && | |
613 | memcmp(a->nsec3.next_hashed_name, b->nsec3.next_hashed_name, a->nsec3.next_hashed_name_size) == 0 && | |
614 | bitmap_equal(a->nsec3.types, b->nsec3.types); | |
615 | ||
2d4c5cbc | 616 | default: |
322345fd LP |
617 | return a->generic.size == b->generic.size && |
618 | memcmp(a->generic.data, b->generic.data, a->generic.size) == 0; | |
2d4c5cbc | 619 | } |
322345fd LP |
620 | } |
621 | ||
0dae31d4 ZJS |
622 | static char* format_location(uint32_t latitude, uint32_t longitude, uint32_t altitude, |
623 | uint8_t size, uint8_t horiz_pre, uint8_t vert_pre) { | |
624 | char *s; | |
625 | char NS = latitude >= 1U<<31 ? 'N' : 'S'; | |
626 | char EW = longitude >= 1U<<31 ? 'E' : 'W'; | |
627 | ||
628 | int lat = latitude >= 1U<<31 ? (int) (latitude - (1U<<31)) : (int) ((1U<<31) - latitude); | |
629 | int lon = longitude >= 1U<<31 ? (int) (longitude - (1U<<31)) : (int) ((1U<<31) - longitude); | |
630 | double alt = altitude >= 10000000u ? altitude - 10000000u : -(double)(10000000u - altitude); | |
631 | double siz = (size >> 4) * exp10((double) (size & 0xF)); | |
632 | double hor = (horiz_pre >> 4) * exp10((double) (horiz_pre & 0xF)); | |
633 | double ver = (vert_pre >> 4) * exp10((double) (vert_pre & 0xF)); | |
634 | ||
635 | if (asprintf(&s, "%d %d %.3f %c %d %d %.3f %c %.2fm %.2fm %.2fm %.2fm", | |
636 | (lat / 60000 / 60), | |
637 | (lat / 60000) % 60, | |
638 | (lat % 60000) / 1000., | |
639 | NS, | |
640 | (lon / 60000 / 60), | |
641 | (lon / 60000) % 60, | |
642 | (lon % 60000) / 1000., | |
643 | EW, | |
644 | alt / 100., | |
645 | siz / 100., | |
646 | hor / 100., | |
647 | ver / 100.) < 0) | |
648 | return NULL; | |
649 | ||
650 | return s; | |
651 | } | |
652 | ||
7c6423e1 TG |
653 | static int format_timestamp_dns(char *buf, size_t l, time_t sec) { |
654 | struct tm tm; | |
655 | ||
656 | assert(buf); | |
657 | assert(l > strlen("YYYYMMDDHHmmSS")); | |
658 | ||
659 | if (!gmtime_r(&sec, &tm)) | |
660 | return -EINVAL; | |
661 | ||
662 | if (strftime(buf, l, "%Y%m%d%H%M%S", &tm) <= 0) | |
663 | return -EINVAL; | |
664 | ||
665 | return 0; | |
666 | } | |
667 | ||
50f1e641 TG |
668 | static char *format_types(Bitmap *types) { |
669 | _cleanup_strv_free_ char **strv = NULL; | |
670 | _cleanup_free_ char *str = NULL; | |
cb57dd41 | 671 | Iterator i; |
50f1e641 TG |
672 | unsigned type; |
673 | int r; | |
674 | ||
cb57dd41 | 675 | BITMAP_FOREACH(type, types, i) { |
50f1e641 | 676 | if (dns_type_to_string(type)) { |
2c1fb4f7 | 677 | r = strv_extend(&strv, dns_type_to_string(type)); |
50f1e641 TG |
678 | if (r < 0) |
679 | return NULL; | |
680 | } else { | |
681 | char *t; | |
682 | ||
683 | r = asprintf(&t, "TYPE%u", type); | |
684 | if (r < 0) | |
685 | return NULL; | |
686 | ||
2c1fb4f7 | 687 | r = strv_consume(&strv, t); |
50f1e641 TG |
688 | if (r < 0) |
689 | return NULL; | |
690 | } | |
691 | } | |
692 | ||
693 | str = strv_join(strv, " "); | |
694 | if (!str) | |
695 | return NULL; | |
696 | ||
697 | return strjoin("( ", str, " )", NULL); | |
698 | } | |
699 | ||
2001c805 LP |
700 | static char *format_txt(DnsTxtItem *first) { |
701 | DnsTxtItem *i; | |
702 | size_t c = 1; | |
703 | char *p, *s; | |
704 | ||
705 | LIST_FOREACH(items, i, first) | |
706 | c += i->length * 4 + 3; | |
707 | ||
708 | p = s = new(char, c); | |
709 | if (!s) | |
710 | return NULL; | |
711 | ||
712 | LIST_FOREACH(items, i, first) { | |
713 | size_t j; | |
714 | ||
715 | if (i != first) | |
716 | *(p++) = ' '; | |
717 | ||
718 | *(p++) = '"'; | |
719 | ||
720 | for (j = 0; j < i->length; j++) { | |
721 | if (i->data[j] < ' ' || i->data[j] == '"' || i->data[j] >= 127) { | |
722 | *(p++) = '\\'; | |
723 | *(p++) = '0' + (i->data[j] / 100); | |
724 | *(p++) = '0' + ((i->data[j] / 10) % 10); | |
725 | *(p++) = '0' + (i->data[j] % 10); | |
726 | } else | |
727 | *(p++) = i->data[j]; | |
728 | } | |
729 | ||
730 | *(p++) = '"'; | |
731 | } | |
732 | ||
733 | *p = 0; | |
734 | return s; | |
735 | } | |
736 | ||
2d4c5cbc | 737 | int dns_resource_record_to_string(const DnsResourceRecord *rr, char **ret) { |
8db0d2f5 | 738 | _cleanup_free_ char *k = NULL, *t = NULL; |
2d4c5cbc LP |
739 | char *s; |
740 | int r; | |
322345fd | 741 | |
2d4c5cbc | 742 | assert(rr); |
322345fd | 743 | |
2d4c5cbc LP |
744 | r = dns_resource_key_to_string(rr->key, &k); |
745 | if (r < 0) | |
746 | return r; | |
322345fd | 747 | |
0dae31d4 | 748 | switch (rr->unparseable ? _DNS_TYPE_INVALID : rr->key->type) { |
322345fd | 749 | |
9c92ce6d LP |
750 | case DNS_TYPE_SRV: |
751 | r = asprintf(&s, "%s %u %u %u %s", | |
752 | k, | |
753 | rr->srv.priority, | |
754 | rr->srv.weight, | |
755 | rr->srv.port, | |
756 | strna(rr->srv.name)); | |
757 | if (r < 0) | |
758 | return -ENOMEM; | |
759 | break; | |
760 | ||
2d4c5cbc LP |
761 | case DNS_TYPE_PTR: |
762 | case DNS_TYPE_NS: | |
763 | case DNS_TYPE_CNAME: | |
8ac4e9e1 | 764 | case DNS_TYPE_DNAME: |
2d4c5cbc LP |
765 | s = strjoin(k, " ", rr->ptr.name, NULL); |
766 | if (!s) | |
767 | return -ENOMEM; | |
322345fd | 768 | |
2d4c5cbc | 769 | break; |
322345fd | 770 | |
2d4c5cbc LP |
771 | case DNS_TYPE_HINFO: |
772 | s = strjoin(k, " ", rr->hinfo.cpu, " ", rr->hinfo.os, NULL); | |
773 | if (!s) | |
774 | return -ENOMEM; | |
775 | break; | |
322345fd | 776 | |
9de3e329 | 777 | case DNS_TYPE_SPF: /* exactly the same as TXT */ |
8db0d2f5 | 778 | case DNS_TYPE_TXT: |
2001c805 | 779 | t = format_txt(rr->txt.items); |
2e276efc ZJS |
780 | if (!t) |
781 | return -ENOMEM; | |
782 | ||
783 | s = strjoin(k, " ", t, NULL); | |
784 | if (!s) | |
785 | return -ENOMEM; | |
2e276efc | 786 | break; |
2e276efc | 787 | |
2d4c5cbc LP |
788 | case DNS_TYPE_A: { |
789 | _cleanup_free_ char *x = NULL; | |
322345fd | 790 | |
2d4c5cbc LP |
791 | r = in_addr_to_string(AF_INET, (const union in_addr_union*) &rr->a.in_addr, &x); |
792 | if (r < 0) | |
793 | return r; | |
322345fd | 794 | |
2d4c5cbc LP |
795 | s = strjoin(k, " ", x, NULL); |
796 | if (!s) | |
797 | return -ENOMEM; | |
798 | break; | |
799 | } | |
322345fd | 800 | |
8db0d2f5 ZJS |
801 | case DNS_TYPE_AAAA: |
802 | r = in_addr_to_string(AF_INET6, (const union in_addr_union*) &rr->aaaa.in6_addr, &t); | |
2d4c5cbc LP |
803 | if (r < 0) |
804 | return r; | |
322345fd | 805 | |
8db0d2f5 | 806 | s = strjoin(k, " ", t, NULL); |
2d4c5cbc LP |
807 | if (!s) |
808 | return -ENOMEM; | |
809 | break; | |
322345fd | 810 | |
2d4c5cbc LP |
811 | case DNS_TYPE_SOA: |
812 | r = asprintf(&s, "%s %s %s %u %u %u %u %u", | |
813 | k, | |
814 | strna(rr->soa.mname), | |
815 | strna(rr->soa.rname), | |
816 | rr->soa.serial, | |
817 | rr->soa.refresh, | |
818 | rr->soa.retry, | |
819 | rr->soa.expire, | |
820 | rr->soa.minimum); | |
821 | if (r < 0) | |
822 | return -ENOMEM; | |
823 | break; | |
824 | ||
946c7094 ZJS |
825 | case DNS_TYPE_MX: |
826 | r = asprintf(&s, "%s %u %s", | |
827 | k, | |
828 | rr->mx.priority, | |
829 | rr->mx.exchange); | |
830 | if (r < 0) | |
831 | return -ENOMEM; | |
832 | break; | |
833 | ||
8db0d2f5 | 834 | case DNS_TYPE_LOC: |
0dae31d4 ZJS |
835 | assert(rr->loc.version == 0); |
836 | ||
8db0d2f5 ZJS |
837 | t = format_location(rr->loc.latitude, |
838 | rr->loc.longitude, | |
839 | rr->loc.altitude, | |
840 | rr->loc.size, | |
841 | rr->loc.horiz_pre, | |
842 | rr->loc.vert_pre); | |
843 | if (!t) | |
0dae31d4 ZJS |
844 | return -ENOMEM; |
845 | ||
8db0d2f5 | 846 | s = strjoin(k, " ", t, NULL); |
0dae31d4 ZJS |
847 | if (!s) |
848 | return -ENOMEM; | |
0dae31d4 | 849 | break; |
0dae31d4 | 850 | |
abf126a3 TG |
851 | case DNS_TYPE_DS: |
852 | t = hexmem(rr->ds.digest, rr->ds.digest_size); | |
853 | if (!t) | |
854 | return -ENOMEM; | |
855 | ||
856 | r = asprintf(&s, "%s %u %u %u %s", | |
857 | k, | |
858 | rr->ds.key_tag, | |
859 | rr->ds.algorithm, | |
860 | rr->ds.digest_type, | |
861 | t); | |
862 | if (r < 0) | |
863 | return -ENOMEM; | |
864 | break; | |
865 | ||
8db0d2f5 | 866 | case DNS_TYPE_SSHFP: |
549c1a25 | 867 | t = hexmem(rr->sshfp.fingerprint, rr->sshfp.fingerprint_size); |
8db0d2f5 | 868 | if (!t) |
42cc2eeb LP |
869 | return -ENOMEM; |
870 | ||
871 | r = asprintf(&s, "%s %u %u %s", | |
872 | k, | |
873 | rr->sshfp.algorithm, | |
874 | rr->sshfp.fptype, | |
8db0d2f5 | 875 | t); |
42cc2eeb LP |
876 | if (r < 0) |
877 | return -ENOMEM; | |
878 | break; | |
42cc2eeb | 879 | |
ff3d6560 ZJS |
880 | case DNS_TYPE_DNSKEY: { |
881 | const char *alg; | |
882 | ||
883 | alg = dnssec_algorithm_to_string(rr->dnskey.algorithm); | |
884 | ||
1bf968f3 | 885 | t = base64mem(rr->dnskey.key, rr->dnskey.key_size); |
8db0d2f5 ZJS |
886 | if (!t) |
887 | return -ENOMEM; | |
2d4c5cbc | 888 | |
ff3d6560 | 889 | r = asprintf(&s, "%s %u 3 %.*s%.*u %s", |
8db0d2f5 ZJS |
890 | k, |
891 | dnskey_to_flags(rr), | |
ff3d6560 ZJS |
892 | alg ? -1 : 0, alg, |
893 | alg ? 0 : 1, alg ? 0u : (unsigned) rr->dnskey.algorithm, | |
8db0d2f5 ZJS |
894 | t); |
895 | if (r < 0) | |
2d4c5cbc | 896 | return -ENOMEM; |
8db0d2f5 | 897 | break; |
ff3d6560 | 898 | } |
2d4c5cbc | 899 | |
151226ab ZJS |
900 | case DNS_TYPE_RRSIG: { |
901 | const char *type, *alg; | |
7c6423e1 | 902 | char expiration[strlen("YYYYMMDDHHmmSS") + 1], inception[strlen("YYYYMMDDHHmmSS") + 1]; |
151226ab ZJS |
903 | |
904 | type = dns_type_to_string(rr->rrsig.type_covered); | |
905 | alg = dnssec_algorithm_to_string(rr->rrsig.algorithm); | |
906 | ||
1bf968f3 | 907 | t = base64mem(rr->rrsig.signature, rr->rrsig.signature_size); |
151226ab ZJS |
908 | if (!t) |
909 | return -ENOMEM; | |
910 | ||
7c6423e1 TG |
911 | r = format_timestamp_dns(expiration, sizeof(expiration), rr->rrsig.expiration); |
912 | if (r < 0) | |
913 | return r; | |
914 | ||
915 | r = format_timestamp_dns(inception, sizeof(inception), rr->rrsig.inception); | |
916 | if (r < 0) | |
917 | return r; | |
918 | ||
151226ab ZJS |
919 | /* TYPE?? follows |
920 | * http://tools.ietf.org/html/rfc3597#section-5 */ | |
921 | ||
7c6423e1 | 922 | r = asprintf(&s, "%s %s%.*u %.*s%.*u %u %u %s %s %u %s %s", |
151226ab ZJS |
923 | k, |
924 | type ?: "TYPE", | |
925 | type ? 0 : 1, type ? 0u : (unsigned) rr->rrsig.type_covered, | |
926 | alg ? -1 : 0, alg, | |
927 | alg ? 0 : 1, alg ? 0u : (unsigned) rr->rrsig.algorithm, | |
928 | rr->rrsig.labels, | |
929 | rr->rrsig.original_ttl, | |
7c6423e1 TG |
930 | expiration, |
931 | inception, | |
151226ab ZJS |
932 | rr->rrsig.key_tag, |
933 | rr->rrsig.signer, | |
934 | t); | |
935 | if (r < 0) | |
936 | return -ENOMEM; | |
937 | break; | |
938 | } | |
939 | ||
50f1e641 TG |
940 | case DNS_TYPE_NSEC: |
941 | t = format_types(rr->nsec.types); | |
942 | if (!t) | |
943 | return -ENOMEM; | |
944 | ||
945 | r = asprintf(&s, "%s %s %s", | |
946 | k, | |
947 | rr->nsec.next_domain_name, | |
948 | t); | |
949 | if (r < 0) | |
950 | return -ENOMEM; | |
951 | break; | |
952 | ||
5d45a880 TG |
953 | case DNS_TYPE_NSEC3: { |
954 | _cleanup_free_ char *salt = NULL, *hash = NULL; | |
955 | ||
f5430a3e | 956 | if (rr->nsec3.salt_size > 0) { |
5d45a880 TG |
957 | salt = hexmem(rr->nsec3.salt, rr->nsec3.salt_size); |
958 | if (!salt) | |
959 | return -ENOMEM; | |
960 | } | |
961 | ||
962 | hash = base32hexmem(rr->nsec3.next_hashed_name, rr->nsec3.next_hashed_name_size, false); | |
963 | if (!hash) | |
964 | return -ENOMEM; | |
965 | ||
966 | t = format_types(rr->nsec3.types); | |
967 | if (!t) | |
968 | return -ENOMEM; | |
969 | ||
970 | r = asprintf(&s, "%s %"PRIu8" %"PRIu8" %"PRIu16" %s %s %s", | |
971 | k, | |
972 | rr->nsec3.algorithm, | |
973 | rr->nsec3.flags, | |
974 | rr->nsec3.iterations, | |
f5430a3e | 975 | rr->nsec3.salt_size > 0 ? salt : "-", |
5d45a880 TG |
976 | hash, |
977 | t); | |
978 | if (r < 0) | |
979 | return -ENOMEM; | |
980 | ||
981 | break; | |
982 | } | |
983 | ||
8db0d2f5 ZJS |
984 | default: |
985 | t = hexmem(rr->generic.data, rr->generic.size); | |
986 | if (!t) | |
987 | return -ENOMEM; | |
988 | ||
f5430a3e | 989 | r = asprintf(&s, "%s \\# %zu %s", k, rr->generic.size, t); |
d23a27a9 | 990 | if (r < 0) |
2d4c5cbc LP |
991 | return -ENOMEM; |
992 | break; | |
8db0d2f5 | 993 | } |
2d4c5cbc LP |
994 | |
995 | *ret = s; | |
996 | return 0; | |
997 | } | |
322345fd | 998 | |
2d4c5cbc | 999 | const char *dns_class_to_string(uint16_t class) { |
322345fd | 1000 | |
2d4c5cbc | 1001 | switch (class) { |
322345fd | 1002 | |
2d4c5cbc LP |
1003 | case DNS_CLASS_IN: |
1004 | return "IN"; | |
322345fd | 1005 | |
2d4c5cbc LP |
1006 | case DNS_CLASS_ANY: |
1007 | return "ANY"; | |
1008 | } | |
322345fd | 1009 | |
2d4c5cbc LP |
1010 | return NULL; |
1011 | } | |
322345fd | 1012 | |
2d4c5cbc LP |
1013 | int dns_class_from_string(const char *s, uint16_t *class) { |
1014 | assert(s); | |
1015 | assert(class); | |
1016 | ||
1017 | if (strcaseeq(s, "IN")) | |
1018 | *class = DNS_CLASS_IN; | |
1019 | else if (strcaseeq(s, "ANY")) | |
816b4547 | 1020 | *class = DNS_CLASS_ANY; |
2d4c5cbc LP |
1021 | else |
1022 | return -EINVAL; | |
322345fd | 1023 | |
2d4c5cbc LP |
1024 | return 0; |
1025 | } | |
2001c805 LP |
1026 | |
1027 | DnsTxtItem *dns_txt_item_free_all(DnsTxtItem *i) { | |
1028 | DnsTxtItem *n; | |
1029 | ||
1030 | if (!i) | |
1031 | return NULL; | |
1032 | ||
1033 | n = i->items_next; | |
1034 | ||
1035 | free(i); | |
1036 | return dns_txt_item_free_all(n); | |
1037 | } | |
1038 | ||
1039 | bool dns_txt_item_equal(DnsTxtItem *a, DnsTxtItem *b) { | |
1040 | ||
1041 | if (!a != !b) | |
1042 | return false; | |
1043 | ||
1044 | if (!a) | |
1045 | return true; | |
1046 | ||
1047 | if (a->length != b->length) | |
1048 | return false; | |
1049 | ||
1050 | if (memcmp(a->data, b->data, a->length) != 0) | |
1051 | return false; | |
1052 | ||
1053 | return dns_txt_item_equal(a->items_next, b->items_next); | |
1054 | } |