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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 | ||
dc477e73 | 98 | if (dns_name_is_root(name)) { |
801ad6a6 LP |
99 | *ret = dns_resource_key_ref(key); |
100 | return 0; | |
101 | } | |
102 | ||
103 | r = dns_name_concat(DNS_RESOURCE_KEY_NAME(key), name, &joined); | |
104 | if (r < 0) | |
105 | return r; | |
106 | ||
107 | new_key = dns_resource_key_new_consume(key->class, key->type, joined); | |
108 | if (!new_key) { | |
109 | free(joined); | |
110 | return -ENOMEM; | |
111 | } | |
112 | ||
113 | *ret = new_key; | |
114 | return 0; | |
115 | } | |
116 | ||
faa133f3 LP |
117 | DnsResourceKey* dns_resource_key_new_consume(uint16_t class, uint16_t type, char *name) { |
118 | DnsResourceKey *k; | |
119 | ||
120 | assert(name); | |
121 | ||
122 | k = new0(DnsResourceKey, 1); | |
123 | if (!k) | |
124 | return NULL; | |
125 | ||
126 | k->n_ref = 1; | |
127 | k->class = class; | |
128 | k->type = type; | |
129 | k->_name = name; | |
130 | ||
131 | return k; | |
132 | } | |
133 | ||
134 | DnsResourceKey* dns_resource_key_ref(DnsResourceKey *k) { | |
135 | ||
136 | if (!k) | |
137 | return NULL; | |
138 | ||
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 | ||
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 | ||
160 | int dns_resource_key_equal(const DnsResourceKey *a, const DnsResourceKey *b) { | |
161 | int r; | |
162 | ||
163 | r = dns_name_equal(DNS_RESOURCE_KEY_NAME(a), DNS_RESOURCE_KEY_NAME(b)); | |
164 | if (r <= 0) | |
165 | return r; | |
166 | ||
167 | if (a->class != b->class) | |
168 | return 0; | |
169 | ||
170 | if (a->type != b->type) | |
171 | return 0; | |
172 | ||
173 | return 1; | |
174 | } | |
175 | ||
801ad6a6 LP |
176 | int dns_resource_key_match_rr(const DnsResourceKey *key, const DnsResourceRecord *rr, const char *search_domain) { |
177 | int r; | |
178 | ||
faa133f3 LP |
179 | assert(key); |
180 | assert(rr); | |
181 | ||
801ad6a6 LP |
182 | /* Checks if an rr matches the specified key. If a search |
183 | * domain is specified, it will also be checked if the key | |
184 | * with the search domain suffixed might match the RR. */ | |
185 | ||
faa133f3 LP |
186 | if (rr->key->class != key->class && key->class != DNS_CLASS_ANY) |
187 | return 0; | |
188 | ||
189 | if (rr->key->type != key->type && key->type != DNS_TYPE_ANY) | |
190 | return 0; | |
191 | ||
801ad6a6 LP |
192 | r = dns_name_equal(DNS_RESOURCE_KEY_NAME(rr->key), DNS_RESOURCE_KEY_NAME(key)); |
193 | if (r != 0) | |
194 | return r; | |
195 | ||
196 | if (search_domain) { | |
197 | _cleanup_free_ char *joined = NULL; | |
198 | ||
199 | r = dns_name_concat(DNS_RESOURCE_KEY_NAME(key), search_domain, &joined); | |
200 | if (r < 0) | |
201 | return r; | |
202 | ||
203 | return dns_name_equal(DNS_RESOURCE_KEY_NAME(rr->key), joined); | |
204 | } | |
205 | ||
206 | return 0; | |
faa133f3 LP |
207 | } |
208 | ||
801ad6a6 LP |
209 | int dns_resource_key_match_cname(const DnsResourceKey *key, const DnsResourceRecord *rr, const char *search_domain) { |
210 | int r; | |
211 | ||
faa133f3 LP |
212 | assert(key); |
213 | assert(rr); | |
214 | ||
215 | if (rr->key->class != key->class && key->class != DNS_CLASS_ANY) | |
216 | return 0; | |
217 | ||
58db254a | 218 | if (rr->key->type == DNS_TYPE_CNAME) |
801ad6a6 | 219 | r = dns_name_equal(DNS_RESOURCE_KEY_NAME(key), DNS_RESOURCE_KEY_NAME(rr->key)); |
58db254a | 220 | else if (rr->key->type == DNS_TYPE_DNAME) |
801ad6a6 | 221 | r = dns_name_endswith(DNS_RESOURCE_KEY_NAME(key), DNS_RESOURCE_KEY_NAME(rr->key)); |
58db254a | 222 | else |
faa133f3 | 223 | return 0; |
801ad6a6 LP |
224 | |
225 | if (r != 0) | |
226 | return r; | |
227 | ||
228 | if (search_domain) { | |
229 | _cleanup_free_ char *joined = NULL; | |
230 | ||
231 | r = dns_name_concat(DNS_RESOURCE_KEY_NAME(key), search_domain, &joined); | |
232 | if (r < 0) | |
233 | return r; | |
234 | ||
235 | if (rr->key->type == DNS_TYPE_CNAME) | |
236 | return dns_name_equal(joined, DNS_RESOURCE_KEY_NAME(rr->key)); | |
237 | else if (rr->key->type == DNS_TYPE_DNAME) | |
238 | return dns_name_endswith(joined, DNS_RESOURCE_KEY_NAME(rr->key)); | |
239 | } | |
240 | ||
241 | return 0; | |
242 | ||
74b2466e LP |
243 | } |
244 | ||
b826ab58 | 245 | static void dns_resource_key_hash_func(const void *i, struct siphash *state) { |
322345fd | 246 | const DnsResourceKey *k = i; |
322345fd | 247 | |
b826ab58 | 248 | assert(k); |
322345fd | 249 | |
b826ab58 TG |
250 | dns_name_hash_func(DNS_RESOURCE_KEY_NAME(k), state); |
251 | siphash24_compress(&k->class, sizeof(k->class), state); | |
252 | siphash24_compress(&k->type, sizeof(k->type), state); | |
322345fd LP |
253 | } |
254 | ||
d5099efc | 255 | static int dns_resource_key_compare_func(const void *a, const void *b) { |
322345fd LP |
256 | const DnsResourceKey *x = a, *y = b; |
257 | int ret; | |
258 | ||
faa133f3 | 259 | ret = dns_name_compare_func(DNS_RESOURCE_KEY_NAME(x), DNS_RESOURCE_KEY_NAME(y)); |
322345fd LP |
260 | if (ret != 0) |
261 | return ret; | |
262 | ||
263 | if (x->type < y->type) | |
264 | return -1; | |
265 | if (x->type > y->type) | |
266 | return 1; | |
267 | ||
268 | if (x->class < y->class) | |
269 | return -1; | |
270 | if (x->class > y->class) | |
271 | return 1; | |
272 | ||
273 | return 0; | |
274 | } | |
275 | ||
d5099efc MS |
276 | const struct hash_ops dns_resource_key_hash_ops = { |
277 | .hash = dns_resource_key_hash_func, | |
278 | .compare = dns_resource_key_compare_func | |
279 | }; | |
280 | ||
2d4c5cbc | 281 | int dns_resource_key_to_string(const DnsResourceKey *key, char **ret) { |
d23a27a9 | 282 | char cbuf[strlen("CLASS") + DECIMAL_STR_MAX(uint16_t)], tbuf[strlen("TYPE") + DECIMAL_STR_MAX(uint16_t)]; |
2d4c5cbc LP |
283 | const char *c, *t; |
284 | char *s; | |
285 | ||
286 | c = dns_class_to_string(key->class); | |
287 | if (!c) { | |
d23a27a9 | 288 | sprintf(cbuf, "CLASS%u", key->class); |
2d4c5cbc LP |
289 | c = cbuf; |
290 | } | |
291 | ||
292 | t = dns_type_to_string(key->type); | |
293 | if (!t){ | |
d23a27a9 | 294 | sprintf(tbuf, "TYPE%u", key->type); |
2d4c5cbc LP |
295 | t = tbuf; |
296 | } | |
297 | ||
23432a1c | 298 | if (asprintf(&s, "%s %s %-5s", DNS_RESOURCE_KEY_NAME(key), c, t) < 0) |
2d4c5cbc LP |
299 | return -ENOMEM; |
300 | ||
301 | *ret = s; | |
302 | return 0; | |
303 | } | |
304 | ||
faa133f3 | 305 | DnsResourceRecord* dns_resource_record_new(DnsResourceKey *key) { |
74b2466e LP |
306 | DnsResourceRecord *rr; |
307 | ||
308 | rr = new0(DnsResourceRecord, 1); | |
309 | if (!rr) | |
310 | return NULL; | |
311 | ||
312 | rr->n_ref = 1; | |
faa133f3 LP |
313 | rr->key = dns_resource_key_ref(key); |
314 | ||
74b2466e LP |
315 | return rr; |
316 | } | |
317 | ||
8bf52d3d LP |
318 | DnsResourceRecord* dns_resource_record_new_full(uint16_t class, uint16_t type, const char *name) { |
319 | _cleanup_(dns_resource_key_unrefp) DnsResourceKey *key = NULL; | |
320 | ||
321 | key = dns_resource_key_new(class, type, name); | |
322 | if (!key) | |
323 | return NULL; | |
324 | ||
325 | return dns_resource_record_new(key); | |
326 | } | |
327 | ||
74b2466e LP |
328 | DnsResourceRecord* dns_resource_record_ref(DnsResourceRecord *rr) { |
329 | if (!rr) | |
330 | return NULL; | |
331 | ||
332 | assert(rr->n_ref > 0); | |
333 | rr->n_ref++; | |
334 | ||
335 | return rr; | |
336 | } | |
337 | ||
338 | DnsResourceRecord* dns_resource_record_unref(DnsResourceRecord *rr) { | |
339 | if (!rr) | |
340 | return NULL; | |
341 | ||
342 | assert(rr->n_ref > 0); | |
343 | ||
344 | if (rr->n_ref > 1) { | |
345 | rr->n_ref--; | |
346 | return NULL; | |
347 | } | |
348 | ||
faa133f3 | 349 | if (rr->key) { |
9de3e329 | 350 | switch(rr->key->type) { |
9c92ce6d LP |
351 | |
352 | case DNS_TYPE_SRV: | |
353 | free(rr->srv.name); | |
354 | break; | |
355 | ||
9de3e329 ZJS |
356 | case DNS_TYPE_PTR: |
357 | case DNS_TYPE_NS: | |
358 | case DNS_TYPE_CNAME: | |
8ac4e9e1 | 359 | case DNS_TYPE_DNAME: |
faa133f3 | 360 | free(rr->ptr.name); |
9de3e329 | 361 | break; |
9c92ce6d | 362 | |
9de3e329 | 363 | case DNS_TYPE_HINFO: |
faa133f3 LP |
364 | free(rr->hinfo.cpu); |
365 | free(rr->hinfo.os); | |
9de3e329 | 366 | break; |
9c92ce6d | 367 | |
9de3e329 | 368 | case DNS_TYPE_TXT: |
9c92ce6d | 369 | case DNS_TYPE_SPF: |
2001c805 | 370 | dns_txt_item_free_all(rr->txt.items); |
9de3e329 | 371 | break; |
9c92ce6d | 372 | |
9de3e329 | 373 | case DNS_TYPE_SOA: |
7e8e0422 LP |
374 | free(rr->soa.mname); |
375 | free(rr->soa.rname); | |
9de3e329 | 376 | break; |
9c92ce6d | 377 | |
9de3e329 | 378 | case DNS_TYPE_MX: |
946c7094 | 379 | free(rr->mx.exchange); |
9de3e329 | 380 | break; |
9c92ce6d | 381 | |
abf126a3 TG |
382 | case DNS_TYPE_DS: |
383 | free(rr->ds.digest); | |
384 | break; | |
385 | ||
42cc2eeb | 386 | case DNS_TYPE_SSHFP: |
549c1a25 | 387 | free(rr->sshfp.fingerprint); |
42cc2eeb LP |
388 | break; |
389 | ||
8db0d2f5 ZJS |
390 | case DNS_TYPE_DNSKEY: |
391 | free(rr->dnskey.key); | |
392 | break; | |
393 | ||
151226ab ZJS |
394 | case DNS_TYPE_RRSIG: |
395 | free(rr->rrsig.signer); | |
396 | free(rr->rrsig.signature); | |
397 | break; | |
398 | ||
50f1e641 TG |
399 | case DNS_TYPE_NSEC: |
400 | free(rr->nsec.next_domain_name); | |
401 | bitmap_free(rr->nsec.types); | |
402 | break; | |
403 | ||
5d45a880 TG |
404 | case DNS_TYPE_NSEC3: |
405 | free(rr->nsec3.next_hashed_name); | |
406 | free(rr->nsec3.salt); | |
407 | bitmap_free(rr->nsec3.types); | |
408 | break; | |
409 | ||
0dae31d4 | 410 | case DNS_TYPE_LOC: |
9de3e329 ZJS |
411 | case DNS_TYPE_A: |
412 | case DNS_TYPE_AAAA: | |
413 | break; | |
9c92ce6d | 414 | |
9de3e329 | 415 | default: |
faa133f3 | 416 | free(rr->generic.data); |
9de3e329 | 417 | } |
322345fd | 418 | |
faa133f3 LP |
419 | dns_resource_key_unref(rr->key); |
420 | } | |
322345fd | 421 | |
faa133f3 | 422 | free(rr); |
322345fd | 423 | |
322345fd LP |
424 | return NULL; |
425 | } | |
426 | ||
623a4c97 LP |
427 | int dns_resource_record_new_reverse(DnsResourceRecord **ret, int family, const union in_addr_union *address, const char *hostname) { |
428 | _cleanup_(dns_resource_key_unrefp) DnsResourceKey *key = NULL; | |
429 | _cleanup_(dns_resource_record_unrefp) DnsResourceRecord *rr = NULL; | |
430 | _cleanup_free_ char *ptr = NULL; | |
431 | int r; | |
432 | ||
433 | assert(ret); | |
434 | assert(address); | |
435 | assert(hostname); | |
436 | ||
437 | r = dns_name_reverse(family, address, &ptr); | |
438 | if (r < 0) | |
439 | return r; | |
440 | ||
441 | key = dns_resource_key_new_consume(DNS_CLASS_IN, DNS_TYPE_PTR, ptr); | |
442 | if (!key) | |
443 | return -ENOMEM; | |
444 | ||
445 | ptr = NULL; | |
446 | ||
447 | rr = dns_resource_record_new(key); | |
448 | if (!rr) | |
449 | return -ENOMEM; | |
450 | ||
451 | rr->ptr.name = strdup(hostname); | |
452 | if (!rr->ptr.name) | |
453 | return -ENOMEM; | |
454 | ||
455 | *ret = rr; | |
456 | rr = NULL; | |
457 | ||
458 | return 0; | |
459 | } | |
460 | ||
78c6a153 LP |
461 | int dns_resource_record_new_address(DnsResourceRecord **ret, int family, const union in_addr_union *address, const char *name) { |
462 | DnsResourceRecord *rr; | |
463 | ||
464 | assert(ret); | |
465 | assert(address); | |
466 | assert(family); | |
467 | ||
468 | if (family == AF_INET) { | |
469 | ||
470 | rr = dns_resource_record_new_full(DNS_CLASS_IN, DNS_TYPE_A, name); | |
471 | if (!rr) | |
472 | return -ENOMEM; | |
473 | ||
474 | rr->a.in_addr = address->in; | |
475 | ||
476 | } else if (family == AF_INET6) { | |
477 | ||
478 | rr = dns_resource_record_new_full(DNS_CLASS_IN, DNS_TYPE_AAAA, name); | |
479 | if (!rr) | |
480 | return -ENOMEM; | |
481 | ||
482 | rr->aaaa.in6_addr = address->in6; | |
483 | } else | |
484 | return -EAFNOSUPPORT; | |
485 | ||
486 | *ret = rr; | |
487 | ||
488 | return 0; | |
489 | } | |
490 | ||
322345fd LP |
491 | int dns_resource_record_equal(const DnsResourceRecord *a, const DnsResourceRecord *b) { |
492 | int r; | |
493 | ||
494 | assert(a); | |
495 | assert(b); | |
496 | ||
faa133f3 | 497 | r = dns_resource_key_equal(a->key, b->key); |
322345fd LP |
498 | if (r <= 0) |
499 | return r; | |
500 | ||
fd0b4602 LP |
501 | if (a->unparseable != b->unparseable) |
502 | return 0; | |
503 | ||
504 | switch (a->unparseable ? _DNS_TYPE_INVALID : a->key->type) { | |
2d4c5cbc | 505 | |
9c92ce6d LP |
506 | case DNS_TYPE_SRV: |
507 | r = dns_name_equal(a->srv.name, b->srv.name); | |
508 | if (r <= 0) | |
509 | return r; | |
510 | ||
511 | return a->srv.priority == b->srv.priority && | |
512 | a->srv.weight == b->srv.weight && | |
513 | a->srv.port == b->srv.port; | |
514 | ||
2d4c5cbc LP |
515 | case DNS_TYPE_PTR: |
516 | case DNS_TYPE_NS: | |
517 | case DNS_TYPE_CNAME: | |
8ac4e9e1 | 518 | case DNS_TYPE_DNAME: |
322345fd | 519 | return dns_name_equal(a->ptr.name, b->ptr.name); |
2d4c5cbc LP |
520 | |
521 | case DNS_TYPE_HINFO: | |
522 | return strcaseeq(a->hinfo.cpu, b->hinfo.cpu) && | |
523 | strcaseeq(a->hinfo.os, b->hinfo.os); | |
524 | ||
9de3e329 | 525 | case DNS_TYPE_SPF: /* exactly the same as TXT */ |
0f84a72e | 526 | case DNS_TYPE_TXT: |
2001c805 | 527 | return dns_txt_item_equal(a->txt.items, b->txt.items); |
2e276efc | 528 | |
2d4c5cbc | 529 | case DNS_TYPE_A: |
322345fd | 530 | return memcmp(&a->a.in_addr, &b->a.in_addr, sizeof(struct in_addr)) == 0; |
2d4c5cbc LP |
531 | |
532 | case DNS_TYPE_AAAA: | |
322345fd | 533 | return memcmp(&a->aaaa.in6_addr, &b->aaaa.in6_addr, sizeof(struct in6_addr)) == 0; |
2d4c5cbc LP |
534 | |
535 | case DNS_TYPE_SOA: | |
7e8e0422 LP |
536 | r = dns_name_equal(a->soa.mname, b->soa.mname); |
537 | if (r <= 0) | |
538 | return r; | |
539 | r = dns_name_equal(a->soa.rname, b->soa.rname); | |
540 | if (r <= 0) | |
541 | return r; | |
542 | ||
543 | return a->soa.serial == b->soa.serial && | |
544 | a->soa.refresh == b->soa.refresh && | |
545 | a->soa.retry == b->soa.retry && | |
546 | a->soa.expire == b->soa.expire && | |
547 | a->soa.minimum == b->soa.minimum; | |
9c92ce6d | 548 | |
946c7094 ZJS |
549 | case DNS_TYPE_MX: |
550 | if (a->mx.priority != b->mx.priority) | |
551 | return 0; | |
552 | ||
553 | return dns_name_equal(a->mx.exchange, b->mx.exchange); | |
554 | ||
0dae31d4 ZJS |
555 | case DNS_TYPE_LOC: |
556 | assert(a->loc.version == b->loc.version); | |
557 | ||
558 | return a->loc.size == b->loc.size && | |
559 | a->loc.horiz_pre == b->loc.horiz_pre && | |
560 | a->loc.vert_pre == b->loc.vert_pre && | |
561 | a->loc.latitude == b->loc.latitude && | |
562 | a->loc.longitude == b->loc.longitude && | |
563 | a->loc.altitude == b->loc.altitude; | |
564 | ||
abf126a3 TG |
565 | case DNS_TYPE_DS: |
566 | return a->ds.key_tag == b->ds.key_tag && | |
567 | a->ds.algorithm == b->ds.algorithm && | |
568 | a->ds.digest_type == b->ds.digest_type && | |
569 | a->ds.digest_size == b->ds.digest_size && | |
570 | memcmp(a->ds.digest, b->ds.digest, a->ds.digest_size) == 0; | |
571 | ||
42cc2eeb LP |
572 | case DNS_TYPE_SSHFP: |
573 | return a->sshfp.algorithm == b->sshfp.algorithm && | |
574 | a->sshfp.fptype == b->sshfp.fptype && | |
549c1a25 TG |
575 | a->sshfp.fingerprint_size == b->sshfp.fingerprint_size && |
576 | memcmp(a->sshfp.fingerprint, b->sshfp.fingerprint, a->sshfp.fingerprint_size) == 0; | |
42cc2eeb | 577 | |
8db0d2f5 ZJS |
578 | case DNS_TYPE_DNSKEY: |
579 | return a->dnskey.zone_key_flag == b->dnskey.zone_key_flag && | |
580 | a->dnskey.sep_flag == b->dnskey.sep_flag && | |
581 | a->dnskey.algorithm == b->dnskey.algorithm && | |
582 | a->dnskey.key_size == b->dnskey.key_size && | |
583 | memcmp(a->dnskey.key, b->dnskey.key, a->dnskey.key_size) == 0; | |
584 | ||
151226ab ZJS |
585 | case DNS_TYPE_RRSIG: |
586 | /* do the fast comparisons first */ | |
03664a62 LN |
587 | if (a->rrsig.type_covered != b->rrsig.type_covered || |
588 | a->rrsig.algorithm != b->rrsig.algorithm || | |
589 | a->rrsig.labels != b->rrsig.labels || | |
590 | a->rrsig.original_ttl != b->rrsig.original_ttl || | |
591 | a->rrsig.expiration != b->rrsig.expiration || | |
592 | a->rrsig.inception != b->rrsig.inception || | |
593 | a->rrsig.key_tag != b->rrsig.key_tag || | |
151226ab ZJS |
594 | a->rrsig.signature_size != b->rrsig.signature_size || |
595 | memcmp(a->rrsig.signature, b->rrsig.signature, a->rrsig.signature_size) != 0) | |
596 | return false; | |
597 | ||
598 | return dns_name_equal(a->rrsig.signer, b->rrsig.signer); | |
599 | ||
50f1e641 TG |
600 | case DNS_TYPE_NSEC: |
601 | return dns_name_equal(a->nsec.next_domain_name, b->nsec.next_domain_name) && | |
602 | bitmap_equal(a->nsec.types, b->nsec.types); | |
603 | ||
5d45a880 TG |
604 | case DNS_TYPE_NSEC3: |
605 | return a->nsec3.algorithm == b->nsec3.algorithm && | |
606 | a->nsec3.flags == b->nsec3.flags && | |
607 | a->nsec3.iterations == b->nsec3.iterations && | |
608 | a->nsec3.salt_size == b->nsec3.salt_size && | |
609 | memcmp(a->nsec3.salt, b->nsec3.salt, a->nsec3.salt_size) == 0 && | |
610 | memcmp(a->nsec3.next_hashed_name, b->nsec3.next_hashed_name, a->nsec3.next_hashed_name_size) == 0 && | |
611 | bitmap_equal(a->nsec3.types, b->nsec3.types); | |
612 | ||
2d4c5cbc | 613 | default: |
322345fd LP |
614 | return a->generic.size == b->generic.size && |
615 | memcmp(a->generic.data, b->generic.data, a->generic.size) == 0; | |
2d4c5cbc | 616 | } |
322345fd LP |
617 | } |
618 | ||
0dae31d4 ZJS |
619 | static char* format_location(uint32_t latitude, uint32_t longitude, uint32_t altitude, |
620 | uint8_t size, uint8_t horiz_pre, uint8_t vert_pre) { | |
621 | char *s; | |
622 | char NS = latitude >= 1U<<31 ? 'N' : 'S'; | |
623 | char EW = longitude >= 1U<<31 ? 'E' : 'W'; | |
624 | ||
625 | int lat = latitude >= 1U<<31 ? (int) (latitude - (1U<<31)) : (int) ((1U<<31) - latitude); | |
626 | int lon = longitude >= 1U<<31 ? (int) (longitude - (1U<<31)) : (int) ((1U<<31) - longitude); | |
627 | double alt = altitude >= 10000000u ? altitude - 10000000u : -(double)(10000000u - altitude); | |
628 | double siz = (size >> 4) * exp10((double) (size & 0xF)); | |
629 | double hor = (horiz_pre >> 4) * exp10((double) (horiz_pre & 0xF)); | |
630 | double ver = (vert_pre >> 4) * exp10((double) (vert_pre & 0xF)); | |
631 | ||
632 | if (asprintf(&s, "%d %d %.3f %c %d %d %.3f %c %.2fm %.2fm %.2fm %.2fm", | |
633 | (lat / 60000 / 60), | |
634 | (lat / 60000) % 60, | |
635 | (lat % 60000) / 1000., | |
636 | NS, | |
637 | (lon / 60000 / 60), | |
638 | (lon / 60000) % 60, | |
639 | (lon % 60000) / 1000., | |
640 | EW, | |
641 | alt / 100., | |
642 | siz / 100., | |
643 | hor / 100., | |
644 | ver / 100.) < 0) | |
645 | return NULL; | |
646 | ||
647 | return s; | |
648 | } | |
649 | ||
7c6423e1 TG |
650 | static int format_timestamp_dns(char *buf, size_t l, time_t sec) { |
651 | struct tm tm; | |
652 | ||
653 | assert(buf); | |
654 | assert(l > strlen("YYYYMMDDHHmmSS")); | |
655 | ||
656 | if (!gmtime_r(&sec, &tm)) | |
657 | return -EINVAL; | |
658 | ||
659 | if (strftime(buf, l, "%Y%m%d%H%M%S", &tm) <= 0) | |
660 | return -EINVAL; | |
661 | ||
662 | return 0; | |
663 | } | |
664 | ||
50f1e641 TG |
665 | static char *format_types(Bitmap *types) { |
666 | _cleanup_strv_free_ char **strv = NULL; | |
667 | _cleanup_free_ char *str = NULL; | |
cb57dd41 | 668 | Iterator i; |
50f1e641 TG |
669 | unsigned type; |
670 | int r; | |
671 | ||
cb57dd41 | 672 | BITMAP_FOREACH(type, types, i) { |
50f1e641 | 673 | if (dns_type_to_string(type)) { |
2c1fb4f7 | 674 | r = strv_extend(&strv, dns_type_to_string(type)); |
50f1e641 TG |
675 | if (r < 0) |
676 | return NULL; | |
677 | } else { | |
678 | char *t; | |
679 | ||
680 | r = asprintf(&t, "TYPE%u", type); | |
681 | if (r < 0) | |
682 | return NULL; | |
683 | ||
2c1fb4f7 | 684 | r = strv_consume(&strv, t); |
50f1e641 TG |
685 | if (r < 0) |
686 | return NULL; | |
687 | } | |
688 | } | |
689 | ||
690 | str = strv_join(strv, " "); | |
691 | if (!str) | |
692 | return NULL; | |
693 | ||
694 | return strjoin("( ", str, " )", NULL); | |
695 | } | |
696 | ||
2001c805 LP |
697 | static char *format_txt(DnsTxtItem *first) { |
698 | DnsTxtItem *i; | |
699 | size_t c = 1; | |
700 | char *p, *s; | |
701 | ||
702 | LIST_FOREACH(items, i, first) | |
703 | c += i->length * 4 + 3; | |
704 | ||
705 | p = s = new(char, c); | |
706 | if (!s) | |
707 | return NULL; | |
708 | ||
709 | LIST_FOREACH(items, i, first) { | |
710 | size_t j; | |
711 | ||
712 | if (i != first) | |
713 | *(p++) = ' '; | |
714 | ||
715 | *(p++) = '"'; | |
716 | ||
717 | for (j = 0; j < i->length; j++) { | |
718 | if (i->data[j] < ' ' || i->data[j] == '"' || i->data[j] >= 127) { | |
719 | *(p++) = '\\'; | |
720 | *(p++) = '0' + (i->data[j] / 100); | |
721 | *(p++) = '0' + ((i->data[j] / 10) % 10); | |
722 | *(p++) = '0' + (i->data[j] % 10); | |
723 | } else | |
724 | *(p++) = i->data[j]; | |
725 | } | |
726 | ||
727 | *(p++) = '"'; | |
728 | } | |
729 | ||
730 | *p = 0; | |
731 | return s; | |
732 | } | |
733 | ||
2d4c5cbc | 734 | int dns_resource_record_to_string(const DnsResourceRecord *rr, char **ret) { |
8db0d2f5 | 735 | _cleanup_free_ char *k = NULL, *t = NULL; |
2d4c5cbc LP |
736 | char *s; |
737 | int r; | |
322345fd | 738 | |
2d4c5cbc | 739 | assert(rr); |
322345fd | 740 | |
2d4c5cbc LP |
741 | r = dns_resource_key_to_string(rr->key, &k); |
742 | if (r < 0) | |
743 | return r; | |
322345fd | 744 | |
0dae31d4 | 745 | switch (rr->unparseable ? _DNS_TYPE_INVALID : rr->key->type) { |
322345fd | 746 | |
9c92ce6d LP |
747 | case DNS_TYPE_SRV: |
748 | r = asprintf(&s, "%s %u %u %u %s", | |
749 | k, | |
750 | rr->srv.priority, | |
751 | rr->srv.weight, | |
752 | rr->srv.port, | |
753 | strna(rr->srv.name)); | |
754 | if (r < 0) | |
755 | return -ENOMEM; | |
756 | break; | |
757 | ||
2d4c5cbc LP |
758 | case DNS_TYPE_PTR: |
759 | case DNS_TYPE_NS: | |
760 | case DNS_TYPE_CNAME: | |
8ac4e9e1 | 761 | case DNS_TYPE_DNAME: |
2d4c5cbc LP |
762 | s = strjoin(k, " ", rr->ptr.name, NULL); |
763 | if (!s) | |
764 | return -ENOMEM; | |
322345fd | 765 | |
2d4c5cbc | 766 | break; |
322345fd | 767 | |
2d4c5cbc LP |
768 | case DNS_TYPE_HINFO: |
769 | s = strjoin(k, " ", rr->hinfo.cpu, " ", rr->hinfo.os, NULL); | |
770 | if (!s) | |
771 | return -ENOMEM; | |
772 | break; | |
322345fd | 773 | |
9de3e329 | 774 | case DNS_TYPE_SPF: /* exactly the same as TXT */ |
8db0d2f5 | 775 | case DNS_TYPE_TXT: |
2001c805 | 776 | t = format_txt(rr->txt.items); |
2e276efc ZJS |
777 | if (!t) |
778 | return -ENOMEM; | |
779 | ||
780 | s = strjoin(k, " ", t, NULL); | |
781 | if (!s) | |
782 | return -ENOMEM; | |
2e276efc | 783 | break; |
2e276efc | 784 | |
2d4c5cbc LP |
785 | case DNS_TYPE_A: { |
786 | _cleanup_free_ char *x = NULL; | |
322345fd | 787 | |
2d4c5cbc LP |
788 | r = in_addr_to_string(AF_INET, (const union in_addr_union*) &rr->a.in_addr, &x); |
789 | if (r < 0) | |
790 | return r; | |
322345fd | 791 | |
2d4c5cbc LP |
792 | s = strjoin(k, " ", x, NULL); |
793 | if (!s) | |
794 | return -ENOMEM; | |
795 | break; | |
796 | } | |
322345fd | 797 | |
8db0d2f5 ZJS |
798 | case DNS_TYPE_AAAA: |
799 | r = in_addr_to_string(AF_INET6, (const union in_addr_union*) &rr->aaaa.in6_addr, &t); | |
2d4c5cbc LP |
800 | if (r < 0) |
801 | return r; | |
322345fd | 802 | |
8db0d2f5 | 803 | s = strjoin(k, " ", t, NULL); |
2d4c5cbc LP |
804 | if (!s) |
805 | return -ENOMEM; | |
806 | break; | |
322345fd | 807 | |
2d4c5cbc LP |
808 | case DNS_TYPE_SOA: |
809 | r = asprintf(&s, "%s %s %s %u %u %u %u %u", | |
810 | k, | |
811 | strna(rr->soa.mname), | |
812 | strna(rr->soa.rname), | |
813 | rr->soa.serial, | |
814 | rr->soa.refresh, | |
815 | rr->soa.retry, | |
816 | rr->soa.expire, | |
817 | rr->soa.minimum); | |
818 | if (r < 0) | |
819 | return -ENOMEM; | |
820 | break; | |
821 | ||
946c7094 ZJS |
822 | case DNS_TYPE_MX: |
823 | r = asprintf(&s, "%s %u %s", | |
824 | k, | |
825 | rr->mx.priority, | |
826 | rr->mx.exchange); | |
827 | if (r < 0) | |
828 | return -ENOMEM; | |
829 | break; | |
830 | ||
8db0d2f5 | 831 | case DNS_TYPE_LOC: |
0dae31d4 ZJS |
832 | assert(rr->loc.version == 0); |
833 | ||
8db0d2f5 ZJS |
834 | t = format_location(rr->loc.latitude, |
835 | rr->loc.longitude, | |
836 | rr->loc.altitude, | |
837 | rr->loc.size, | |
838 | rr->loc.horiz_pre, | |
839 | rr->loc.vert_pre); | |
840 | if (!t) | |
0dae31d4 ZJS |
841 | return -ENOMEM; |
842 | ||
8db0d2f5 | 843 | s = strjoin(k, " ", t, NULL); |
0dae31d4 ZJS |
844 | if (!s) |
845 | return -ENOMEM; | |
0dae31d4 | 846 | break; |
0dae31d4 | 847 | |
abf126a3 TG |
848 | case DNS_TYPE_DS: |
849 | t = hexmem(rr->ds.digest, rr->ds.digest_size); | |
850 | if (!t) | |
851 | return -ENOMEM; | |
852 | ||
853 | r = asprintf(&s, "%s %u %u %u %s", | |
854 | k, | |
855 | rr->ds.key_tag, | |
856 | rr->ds.algorithm, | |
857 | rr->ds.digest_type, | |
858 | t); | |
859 | if (r < 0) | |
860 | return -ENOMEM; | |
861 | break; | |
862 | ||
8db0d2f5 | 863 | case DNS_TYPE_SSHFP: |
549c1a25 | 864 | t = hexmem(rr->sshfp.fingerprint, rr->sshfp.fingerprint_size); |
8db0d2f5 | 865 | if (!t) |
42cc2eeb LP |
866 | return -ENOMEM; |
867 | ||
868 | r = asprintf(&s, "%s %u %u %s", | |
869 | k, | |
870 | rr->sshfp.algorithm, | |
871 | rr->sshfp.fptype, | |
8db0d2f5 | 872 | t); |
42cc2eeb LP |
873 | if (r < 0) |
874 | return -ENOMEM; | |
875 | break; | |
42cc2eeb | 876 | |
ff3d6560 ZJS |
877 | case DNS_TYPE_DNSKEY: { |
878 | const char *alg; | |
879 | ||
880 | alg = dnssec_algorithm_to_string(rr->dnskey.algorithm); | |
881 | ||
1bf968f3 | 882 | t = base64mem(rr->dnskey.key, rr->dnskey.key_size); |
8db0d2f5 ZJS |
883 | if (!t) |
884 | return -ENOMEM; | |
2d4c5cbc | 885 | |
ff3d6560 | 886 | r = asprintf(&s, "%s %u 3 %.*s%.*u %s", |
8db0d2f5 ZJS |
887 | k, |
888 | dnskey_to_flags(rr), | |
ff3d6560 ZJS |
889 | alg ? -1 : 0, alg, |
890 | alg ? 0 : 1, alg ? 0u : (unsigned) rr->dnskey.algorithm, | |
8db0d2f5 ZJS |
891 | t); |
892 | if (r < 0) | |
2d4c5cbc | 893 | return -ENOMEM; |
8db0d2f5 | 894 | break; |
ff3d6560 | 895 | } |
2d4c5cbc | 896 | |
151226ab ZJS |
897 | case DNS_TYPE_RRSIG: { |
898 | const char *type, *alg; | |
7c6423e1 | 899 | char expiration[strlen("YYYYMMDDHHmmSS") + 1], inception[strlen("YYYYMMDDHHmmSS") + 1]; |
151226ab ZJS |
900 | |
901 | type = dns_type_to_string(rr->rrsig.type_covered); | |
902 | alg = dnssec_algorithm_to_string(rr->rrsig.algorithm); | |
903 | ||
1bf968f3 | 904 | t = base64mem(rr->rrsig.signature, rr->rrsig.signature_size); |
151226ab ZJS |
905 | if (!t) |
906 | return -ENOMEM; | |
907 | ||
7c6423e1 TG |
908 | r = format_timestamp_dns(expiration, sizeof(expiration), rr->rrsig.expiration); |
909 | if (r < 0) | |
910 | return r; | |
911 | ||
912 | r = format_timestamp_dns(inception, sizeof(inception), rr->rrsig.inception); | |
913 | if (r < 0) | |
914 | return r; | |
915 | ||
151226ab ZJS |
916 | /* TYPE?? follows |
917 | * http://tools.ietf.org/html/rfc3597#section-5 */ | |
918 | ||
7c6423e1 | 919 | r = asprintf(&s, "%s %s%.*u %.*s%.*u %u %u %s %s %u %s %s", |
151226ab ZJS |
920 | k, |
921 | type ?: "TYPE", | |
922 | type ? 0 : 1, type ? 0u : (unsigned) rr->rrsig.type_covered, | |
923 | alg ? -1 : 0, alg, | |
924 | alg ? 0 : 1, alg ? 0u : (unsigned) rr->rrsig.algorithm, | |
925 | rr->rrsig.labels, | |
926 | rr->rrsig.original_ttl, | |
7c6423e1 TG |
927 | expiration, |
928 | inception, | |
151226ab ZJS |
929 | rr->rrsig.key_tag, |
930 | rr->rrsig.signer, | |
931 | t); | |
932 | if (r < 0) | |
933 | return -ENOMEM; | |
934 | break; | |
935 | } | |
936 | ||
50f1e641 TG |
937 | case DNS_TYPE_NSEC: |
938 | t = format_types(rr->nsec.types); | |
939 | if (!t) | |
940 | return -ENOMEM; | |
941 | ||
942 | r = asprintf(&s, "%s %s %s", | |
943 | k, | |
944 | rr->nsec.next_domain_name, | |
945 | t); | |
946 | if (r < 0) | |
947 | return -ENOMEM; | |
948 | break; | |
949 | ||
5d45a880 TG |
950 | case DNS_TYPE_NSEC3: { |
951 | _cleanup_free_ char *salt = NULL, *hash = NULL; | |
952 | ||
f5430a3e | 953 | if (rr->nsec3.salt_size > 0) { |
5d45a880 TG |
954 | salt = hexmem(rr->nsec3.salt, rr->nsec3.salt_size); |
955 | if (!salt) | |
956 | return -ENOMEM; | |
957 | } | |
958 | ||
959 | hash = base32hexmem(rr->nsec3.next_hashed_name, rr->nsec3.next_hashed_name_size, false); | |
960 | if (!hash) | |
961 | return -ENOMEM; | |
962 | ||
963 | t = format_types(rr->nsec3.types); | |
964 | if (!t) | |
965 | return -ENOMEM; | |
966 | ||
967 | r = asprintf(&s, "%s %"PRIu8" %"PRIu8" %"PRIu16" %s %s %s", | |
968 | k, | |
969 | rr->nsec3.algorithm, | |
970 | rr->nsec3.flags, | |
971 | rr->nsec3.iterations, | |
f5430a3e | 972 | rr->nsec3.salt_size > 0 ? salt : "-", |
5d45a880 TG |
973 | hash, |
974 | t); | |
975 | if (r < 0) | |
976 | return -ENOMEM; | |
977 | ||
978 | break; | |
979 | } | |
980 | ||
8db0d2f5 ZJS |
981 | default: |
982 | t = hexmem(rr->generic.data, rr->generic.size); | |
983 | if (!t) | |
984 | return -ENOMEM; | |
985 | ||
f5430a3e | 986 | r = asprintf(&s, "%s \\# %zu %s", k, rr->generic.size, t); |
d23a27a9 | 987 | if (r < 0) |
2d4c5cbc LP |
988 | return -ENOMEM; |
989 | break; | |
8db0d2f5 | 990 | } |
2d4c5cbc LP |
991 | |
992 | *ret = s; | |
993 | return 0; | |
994 | } | |
322345fd | 995 | |
2d4c5cbc | 996 | const char *dns_class_to_string(uint16_t class) { |
322345fd | 997 | |
2d4c5cbc | 998 | switch (class) { |
322345fd | 999 | |
2d4c5cbc LP |
1000 | case DNS_CLASS_IN: |
1001 | return "IN"; | |
322345fd | 1002 | |
2d4c5cbc LP |
1003 | case DNS_CLASS_ANY: |
1004 | return "ANY"; | |
1005 | } | |
322345fd | 1006 | |
2d4c5cbc LP |
1007 | return NULL; |
1008 | } | |
322345fd | 1009 | |
2d4c5cbc LP |
1010 | int dns_class_from_string(const char *s, uint16_t *class) { |
1011 | assert(s); | |
1012 | assert(class); | |
1013 | ||
1014 | if (strcaseeq(s, "IN")) | |
1015 | *class = DNS_CLASS_IN; | |
1016 | else if (strcaseeq(s, "ANY")) | |
816b4547 | 1017 | *class = DNS_CLASS_ANY; |
2d4c5cbc LP |
1018 | else |
1019 | return -EINVAL; | |
322345fd | 1020 | |
2d4c5cbc LP |
1021 | return 0; |
1022 | } | |
2001c805 LP |
1023 | |
1024 | DnsTxtItem *dns_txt_item_free_all(DnsTxtItem *i) { | |
1025 | DnsTxtItem *n; | |
1026 | ||
1027 | if (!i) | |
1028 | return NULL; | |
1029 | ||
1030 | n = i->items_next; | |
1031 | ||
1032 | free(i); | |
1033 | return dns_txt_item_free_all(n); | |
1034 | } | |
1035 | ||
1036 | bool dns_txt_item_equal(DnsTxtItem *a, DnsTxtItem *b) { | |
1037 | ||
1038 | if (!a != !b) | |
1039 | return false; | |
1040 | ||
1041 | if (!a) | |
1042 | return true; | |
1043 | ||
1044 | if (a->length != b->length) | |
1045 | return false; | |
1046 | ||
1047 | if (memcmp(a->data, b->data, a->length) != 0) | |
1048 | return false; | |
1049 | ||
1050 | return dns_txt_item_equal(a->items_next, b->items_next); | |
1051 | } |