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1 | /* SPDX-License-Identifier: LGPL-2.1+ */ | |
2 | ||
3 | #include "alloc-util.h" | |
4 | #include "dns-domain.h" | |
5 | #include "list.h" | |
6 | #include "resolved-dns-packet.h" | |
7 | #include "resolved-dns-zone.h" | |
8 | #include "resolved-dnssd.h" | |
9 | #include "resolved-manager.h" | |
10 | #include "string-util.h" | |
11 | ||
12 | /* Never allow more than 1K entries */ | |
13 | #define ZONE_MAX 1024 | |
14 | ||
15 | void dns_zone_item_probe_stop(DnsZoneItem *i) { | |
16 | DnsTransaction *t; | |
17 | assert(i); | |
18 | ||
19 | if (!i->probe_transaction) | |
20 | return; | |
21 | ||
22 | t = TAKE_PTR(i->probe_transaction); | |
23 | ||
24 | set_remove(t->notify_zone_items, i); | |
25 | set_remove(t->notify_zone_items_done, i); | |
26 | dns_transaction_gc(t); | |
27 | } | |
28 | ||
29 | static void dns_zone_item_free(DnsZoneItem *i) { | |
30 | if (!i) | |
31 | return; | |
32 | ||
33 | dns_zone_item_probe_stop(i); | |
34 | dns_resource_record_unref(i->rr); | |
35 | ||
36 | free(i); | |
37 | } | |
38 | ||
39 | DEFINE_TRIVIAL_CLEANUP_FUNC(DnsZoneItem*, dns_zone_item_free); | |
40 | ||
41 | static void dns_zone_item_remove_and_free(DnsZone *z, DnsZoneItem *i) { | |
42 | DnsZoneItem *first; | |
43 | ||
44 | assert(z); | |
45 | ||
46 | if (!i) | |
47 | return; | |
48 | ||
49 | first = hashmap_get(z->by_key, i->rr->key); | |
50 | LIST_REMOVE(by_key, first, i); | |
51 | if (first) | |
52 | assert_se(hashmap_replace(z->by_key, first->rr->key, first) >= 0); | |
53 | else | |
54 | hashmap_remove(z->by_key, i->rr->key); | |
55 | ||
56 | first = hashmap_get(z->by_name, dns_resource_key_name(i->rr->key)); | |
57 | LIST_REMOVE(by_name, first, i); | |
58 | if (first) | |
59 | assert_se(hashmap_replace(z->by_name, dns_resource_key_name(first->rr->key), first) >= 0); | |
60 | else | |
61 | hashmap_remove(z->by_name, dns_resource_key_name(i->rr->key)); | |
62 | ||
63 | dns_zone_item_free(i); | |
64 | } | |
65 | ||
66 | void dns_zone_flush(DnsZone *z) { | |
67 | DnsZoneItem *i; | |
68 | ||
69 | assert(z); | |
70 | ||
71 | while ((i = hashmap_first(z->by_key))) | |
72 | dns_zone_item_remove_and_free(z, i); | |
73 | ||
74 | assert(hashmap_size(z->by_key) == 0); | |
75 | assert(hashmap_size(z->by_name) == 0); | |
76 | ||
77 | z->by_key = hashmap_free(z->by_key); | |
78 | z->by_name = hashmap_free(z->by_name); | |
79 | } | |
80 | ||
81 | DnsZoneItem* dns_zone_get(DnsZone *z, DnsResourceRecord *rr) { | |
82 | DnsZoneItem *i; | |
83 | ||
84 | assert(z); | |
85 | assert(rr); | |
86 | ||
87 | LIST_FOREACH(by_key, i, hashmap_get(z->by_key, rr->key)) | |
88 | if (dns_resource_record_equal(i->rr, rr) > 0) | |
89 | return i; | |
90 | ||
91 | return NULL; | |
92 | } | |
93 | ||
94 | void dns_zone_remove_rr(DnsZone *z, DnsResourceRecord *rr) { | |
95 | DnsZoneItem *i; | |
96 | ||
97 | assert(z); | |
98 | assert(rr); | |
99 | ||
100 | i = dns_zone_get(z, rr); | |
101 | if (i) | |
102 | dns_zone_item_remove_and_free(z, i); | |
103 | } | |
104 | ||
105 | int dns_zone_remove_rrs_by_key(DnsZone *z, DnsResourceKey *key) { | |
106 | _cleanup_(dns_answer_unrefp) DnsAnswer *answer = NULL, *soa = NULL; | |
107 | DnsResourceRecord *rr; | |
108 | bool tentative; | |
109 | int r; | |
110 | ||
111 | r = dns_zone_lookup(z, key, 0, &answer, &soa, &tentative); | |
112 | if (r < 0) | |
113 | return r; | |
114 | ||
115 | DNS_ANSWER_FOREACH(rr, answer) | |
116 | dns_zone_remove_rr(z, rr); | |
117 | ||
118 | return 0; | |
119 | } | |
120 | ||
121 | static int dns_zone_init(DnsZone *z) { | |
122 | int r; | |
123 | ||
124 | assert(z); | |
125 | ||
126 | r = hashmap_ensure_allocated(&z->by_key, &dns_resource_key_hash_ops); | |
127 | if (r < 0) | |
128 | return r; | |
129 | ||
130 | r = hashmap_ensure_allocated(&z->by_name, &dns_name_hash_ops); | |
131 | if (r < 0) | |
132 | return r; | |
133 | ||
134 | return 0; | |
135 | } | |
136 | ||
137 | static int dns_zone_link_item(DnsZone *z, DnsZoneItem *i) { | |
138 | DnsZoneItem *first; | |
139 | int r; | |
140 | ||
141 | first = hashmap_get(z->by_key, i->rr->key); | |
142 | if (first) { | |
143 | LIST_PREPEND(by_key, first, i); | |
144 | assert_se(hashmap_replace(z->by_key, first->rr->key, first) >= 0); | |
145 | } else { | |
146 | r = hashmap_put(z->by_key, i->rr->key, i); | |
147 | if (r < 0) | |
148 | return r; | |
149 | } | |
150 | ||
151 | first = hashmap_get(z->by_name, dns_resource_key_name(i->rr->key)); | |
152 | if (first) { | |
153 | LIST_PREPEND(by_name, first, i); | |
154 | assert_se(hashmap_replace(z->by_name, dns_resource_key_name(first->rr->key), first) >= 0); | |
155 | } else { | |
156 | r = hashmap_put(z->by_name, dns_resource_key_name(i->rr->key), i); | |
157 | if (r < 0) | |
158 | return r; | |
159 | } | |
160 | ||
161 | return 0; | |
162 | } | |
163 | ||
164 | static int dns_zone_item_probe_start(DnsZoneItem *i) { | |
165 | _cleanup_(dns_transaction_gcp) DnsTransaction *t = NULL; | |
166 | int r; | |
167 | ||
168 | assert(i); | |
169 | ||
170 | if (i->probe_transaction) | |
171 | return 0; | |
172 | ||
173 | t = dns_scope_find_transaction(i->scope, &DNS_RESOURCE_KEY_CONST(i->rr->key->class, DNS_TYPE_ANY, dns_resource_key_name(i->rr->key)), false); | |
174 | if (!t) { | |
175 | _cleanup_(dns_resource_key_unrefp) DnsResourceKey *key = NULL; | |
176 | ||
177 | key = dns_resource_key_new(i->rr->key->class, DNS_TYPE_ANY, dns_resource_key_name(i->rr->key)); | |
178 | if (!key) | |
179 | return -ENOMEM; | |
180 | ||
181 | r = dns_transaction_new(&t, i->scope, key); | |
182 | if (r < 0) | |
183 | return r; | |
184 | } | |
185 | ||
186 | r = set_ensure_allocated(&t->notify_zone_items_done, NULL); | |
187 | if (r < 0) | |
188 | return r; | |
189 | ||
190 | r = set_ensure_put(&t->notify_zone_items, NULL, i); | |
191 | if (r < 0) | |
192 | return r; | |
193 | ||
194 | t->probing = true; | |
195 | i->probe_transaction = TAKE_PTR(t); | |
196 | ||
197 | if (i->probe_transaction->state == DNS_TRANSACTION_NULL) { | |
198 | i->block_ready++; | |
199 | r = dns_transaction_go(i->probe_transaction); | |
200 | i->block_ready--; | |
201 | ||
202 | if (r < 0) { | |
203 | dns_zone_item_probe_stop(i); | |
204 | return r; | |
205 | } | |
206 | } | |
207 | ||
208 | dns_zone_item_notify(i); | |
209 | return 0; | |
210 | } | |
211 | ||
212 | int dns_zone_put(DnsZone *z, DnsScope *s, DnsResourceRecord *rr, bool probe) { | |
213 | _cleanup_(dns_zone_item_freep) DnsZoneItem *i = NULL; | |
214 | DnsZoneItem *existing; | |
215 | int r; | |
216 | ||
217 | assert(z); | |
218 | assert(s); | |
219 | assert(rr); | |
220 | ||
221 | if (dns_class_is_pseudo(rr->key->class)) | |
222 | return -EINVAL; | |
223 | if (dns_type_is_pseudo(rr->key->type)) | |
224 | return -EINVAL; | |
225 | ||
226 | existing = dns_zone_get(z, rr); | |
227 | if (existing) | |
228 | return 0; | |
229 | ||
230 | r = dns_zone_init(z); | |
231 | if (r < 0) | |
232 | return r; | |
233 | ||
234 | i = new0(DnsZoneItem, 1); | |
235 | if (!i) | |
236 | return -ENOMEM; | |
237 | ||
238 | i->scope = s; | |
239 | i->rr = dns_resource_record_ref(rr); | |
240 | i->probing_enabled = probe; | |
241 | ||
242 | r = dns_zone_link_item(z, i); | |
243 | if (r < 0) | |
244 | return r; | |
245 | ||
246 | if (probe) { | |
247 | DnsZoneItem *first, *j; | |
248 | bool established = false; | |
249 | ||
250 | /* Check if there's already an RR with the same name | |
251 | * established. If so, it has been probed already, and | |
252 | * we don't need to probe again. */ | |
253 | ||
254 | LIST_FIND_HEAD(by_name, i, first); | |
255 | LIST_FOREACH(by_name, j, first) { | |
256 | if (i == j) | |
257 | continue; | |
258 | ||
259 | if (j->state == DNS_ZONE_ITEM_ESTABLISHED) | |
260 | established = true; | |
261 | } | |
262 | ||
263 | if (established) | |
264 | i->state = DNS_ZONE_ITEM_ESTABLISHED; | |
265 | else { | |
266 | i->state = DNS_ZONE_ITEM_PROBING; | |
267 | ||
268 | r = dns_zone_item_probe_start(i); | |
269 | if (r < 0) { | |
270 | dns_zone_item_remove_and_free(z, i); | |
271 | i = NULL; | |
272 | return r; | |
273 | } | |
274 | } | |
275 | } else | |
276 | i->state = DNS_ZONE_ITEM_ESTABLISHED; | |
277 | ||
278 | i = NULL; | |
279 | return 0; | |
280 | } | |
281 | ||
282 | static int dns_zone_add_authenticated_answer(DnsAnswer *a, DnsZoneItem *i, int ifindex) { | |
283 | DnsAnswerFlags flags; | |
284 | ||
285 | /* From RFC 6762, Section 10.2 | |
286 | * "They (the rules about when to set the cache-flush bit) apply to | |
287 | * startup announcements as described in Section 8.3, "Announcing", | |
288 | * and to responses generated as a result of receiving query messages." | |
289 | * So, set the cache-flush bit for mDNS answers except for DNS-SD | |
290 | * service enumeration PTRs described in RFC 6763, Section 4.1. */ | |
291 | if (i->scope->protocol == DNS_PROTOCOL_MDNS && | |
292 | !dns_resource_key_is_dnssd_ptr(i->rr->key)) | |
293 | flags = DNS_ANSWER_AUTHENTICATED|DNS_ANSWER_CACHE_FLUSH; | |
294 | else | |
295 | flags = DNS_ANSWER_AUTHENTICATED; | |
296 | ||
297 | return dns_answer_add(a, i->rr, ifindex, flags); | |
298 | } | |
299 | ||
300 | int dns_zone_lookup(DnsZone *z, DnsResourceKey *key, int ifindex, DnsAnswer **ret_answer, DnsAnswer **ret_soa, bool *ret_tentative) { | |
301 | _cleanup_(dns_answer_unrefp) DnsAnswer *answer = NULL, *soa = NULL; | |
302 | unsigned n_answer = 0; | |
303 | DnsZoneItem *j, *first; | |
304 | bool tentative = true, need_soa = false; | |
305 | int r; | |
306 | ||
307 | /* Note that we don't actually need the ifindex for anything. However when it is passed we'll initialize the | |
308 | * ifindex field in the answer with it */ | |
309 | ||
310 | assert(z); | |
311 | assert(key); | |
312 | assert(ret_answer); | |
313 | ||
314 | /* First iteration, count what we have */ | |
315 | ||
316 | if (key->type == DNS_TYPE_ANY || key->class == DNS_CLASS_ANY) { | |
317 | bool found = false, added = false; | |
318 | int k; | |
319 | ||
320 | /* If this is a generic match, then we have to | |
321 | * go through the list by the name and look | |
322 | * for everything manually */ | |
323 | ||
324 | first = hashmap_get(z->by_name, dns_resource_key_name(key)); | |
325 | LIST_FOREACH(by_name, j, first) { | |
326 | if (!IN_SET(j->state, DNS_ZONE_ITEM_PROBING, DNS_ZONE_ITEM_ESTABLISHED, DNS_ZONE_ITEM_VERIFYING)) | |
327 | continue; | |
328 | ||
329 | found = true; | |
330 | ||
331 | k = dns_resource_key_match_rr(key, j->rr, NULL); | |
332 | if (k < 0) | |
333 | return k; | |
334 | if (k > 0) { | |
335 | n_answer++; | |
336 | added = true; | |
337 | } | |
338 | ||
339 | } | |
340 | ||
341 | if (found && !added) | |
342 | need_soa = true; | |
343 | ||
344 | } else { | |
345 | bool found = false; | |
346 | ||
347 | /* If this is a specific match, then look for | |
348 | * the right key immediately */ | |
349 | ||
350 | first = hashmap_get(z->by_key, key); | |
351 | LIST_FOREACH(by_key, j, first) { | |
352 | if (!IN_SET(j->state, DNS_ZONE_ITEM_PROBING, DNS_ZONE_ITEM_ESTABLISHED, DNS_ZONE_ITEM_VERIFYING)) | |
353 | continue; | |
354 | ||
355 | found = true; | |
356 | n_answer++; | |
357 | } | |
358 | ||
359 | if (!found) { | |
360 | first = hashmap_get(z->by_name, dns_resource_key_name(key)); | |
361 | LIST_FOREACH(by_name, j, first) { | |
362 | if (!IN_SET(j->state, DNS_ZONE_ITEM_PROBING, DNS_ZONE_ITEM_ESTABLISHED, DNS_ZONE_ITEM_VERIFYING)) | |
363 | continue; | |
364 | ||
365 | need_soa = true; | |
366 | break; | |
367 | } | |
368 | } | |
369 | } | |
370 | ||
371 | if (n_answer <= 0 && !need_soa) | |
372 | goto return_empty; | |
373 | ||
374 | if (n_answer > 0) { | |
375 | answer = dns_answer_new(n_answer); | |
376 | if (!answer) | |
377 | return -ENOMEM; | |
378 | } | |
379 | ||
380 | if (need_soa) { | |
381 | soa = dns_answer_new(1); | |
382 | if (!soa) | |
383 | return -ENOMEM; | |
384 | } | |
385 | ||
386 | /* Second iteration, actually add the RRs to the answers */ | |
387 | if (key->type == DNS_TYPE_ANY || key->class == DNS_CLASS_ANY) { | |
388 | bool found = false, added = false; | |
389 | int k; | |
390 | ||
391 | first = hashmap_get(z->by_name, dns_resource_key_name(key)); | |
392 | LIST_FOREACH(by_name, j, first) { | |
393 | if (!IN_SET(j->state, DNS_ZONE_ITEM_PROBING, DNS_ZONE_ITEM_ESTABLISHED, DNS_ZONE_ITEM_VERIFYING)) | |
394 | continue; | |
395 | ||
396 | found = true; | |
397 | ||
398 | if (j->state != DNS_ZONE_ITEM_PROBING) | |
399 | tentative = false; | |
400 | ||
401 | k = dns_resource_key_match_rr(key, j->rr, NULL); | |
402 | if (k < 0) | |
403 | return k; | |
404 | if (k > 0) { | |
405 | r = dns_zone_add_authenticated_answer(answer, j, ifindex); | |
406 | if (r < 0) | |
407 | return r; | |
408 | ||
409 | added = true; | |
410 | } | |
411 | } | |
412 | ||
413 | if (found && !added) { | |
414 | r = dns_answer_add_soa(soa, dns_resource_key_name(key), LLMNR_DEFAULT_TTL, ifindex); | |
415 | if (r < 0) | |
416 | return r; | |
417 | } | |
418 | } else { | |
419 | bool found = false; | |
420 | ||
421 | first = hashmap_get(z->by_key, key); | |
422 | LIST_FOREACH(by_key, j, first) { | |
423 | if (!IN_SET(j->state, DNS_ZONE_ITEM_PROBING, DNS_ZONE_ITEM_ESTABLISHED, DNS_ZONE_ITEM_VERIFYING)) | |
424 | continue; | |
425 | ||
426 | found = true; | |
427 | ||
428 | if (j->state != DNS_ZONE_ITEM_PROBING) | |
429 | tentative = false; | |
430 | ||
431 | r = dns_zone_add_authenticated_answer(answer, j, ifindex); | |
432 | if (r < 0) | |
433 | return r; | |
434 | } | |
435 | ||
436 | if (!found) { | |
437 | bool add_soa = false; | |
438 | ||
439 | first = hashmap_get(z->by_name, dns_resource_key_name(key)); | |
440 | LIST_FOREACH(by_name, j, first) { | |
441 | if (!IN_SET(j->state, DNS_ZONE_ITEM_PROBING, DNS_ZONE_ITEM_ESTABLISHED, DNS_ZONE_ITEM_VERIFYING)) | |
442 | continue; | |
443 | ||
444 | if (j->state != DNS_ZONE_ITEM_PROBING) | |
445 | tentative = false; | |
446 | ||
447 | add_soa = true; | |
448 | } | |
449 | ||
450 | if (add_soa) { | |
451 | r = dns_answer_add_soa(soa, dns_resource_key_name(key), LLMNR_DEFAULT_TTL, ifindex); | |
452 | if (r < 0) | |
453 | return r; | |
454 | } | |
455 | } | |
456 | } | |
457 | ||
458 | /* If the caller sets ret_tentative to NULL, then use this as | |
459 | * indication to not return tentative entries */ | |
460 | ||
461 | if (!ret_tentative && tentative) | |
462 | goto return_empty; | |
463 | ||
464 | *ret_answer = TAKE_PTR(answer); | |
465 | ||
466 | if (ret_soa) | |
467 | *ret_soa = TAKE_PTR(soa); | |
468 | ||
469 | if (ret_tentative) | |
470 | *ret_tentative = tentative; | |
471 | ||
472 | return 1; | |
473 | ||
474 | return_empty: | |
475 | *ret_answer = NULL; | |
476 | ||
477 | if (ret_soa) | |
478 | *ret_soa = NULL; | |
479 | ||
480 | if (ret_tentative) | |
481 | *ret_tentative = false; | |
482 | ||
483 | return 0; | |
484 | } | |
485 | ||
486 | void dns_zone_item_conflict(DnsZoneItem *i) { | |
487 | assert(i); | |
488 | ||
489 | if (!IN_SET(i->state, DNS_ZONE_ITEM_PROBING, DNS_ZONE_ITEM_VERIFYING, DNS_ZONE_ITEM_ESTABLISHED)) | |
490 | return; | |
491 | ||
492 | log_info("Detected conflict on %s", strna(dns_resource_record_to_string(i->rr))); | |
493 | ||
494 | dns_zone_item_probe_stop(i); | |
495 | ||
496 | /* Withdraw the conflict item */ | |
497 | i->state = DNS_ZONE_ITEM_WITHDRAWN; | |
498 | ||
499 | dnssd_signal_conflict(i->scope->manager, dns_resource_key_name(i->rr->key)); | |
500 | ||
501 | /* Maybe change the hostname */ | |
502 | if (manager_is_own_hostname(i->scope->manager, dns_resource_key_name(i->rr->key)) > 0) | |
503 | manager_next_hostname(i->scope->manager); | |
504 | } | |
505 | ||
506 | void dns_zone_item_notify(DnsZoneItem *i) { | |
507 | assert(i); | |
508 | assert(i->probe_transaction); | |
509 | ||
510 | if (i->block_ready > 0) | |
511 | return; | |
512 | ||
513 | if (IN_SET(i->probe_transaction->state, DNS_TRANSACTION_NULL, DNS_TRANSACTION_PENDING, DNS_TRANSACTION_VALIDATING)) | |
514 | return; | |
515 | ||
516 | if (i->probe_transaction->state == DNS_TRANSACTION_SUCCESS) { | |
517 | bool we_lost = false; | |
518 | ||
519 | /* The probe got a successful reply. If we so far | |
520 | * weren't established we just give up. | |
521 | * | |
522 | * In LLMNR case if we already | |
523 | * were established, and the peer has the | |
524 | * lexicographically larger IP address we continue | |
525 | * and defend it. */ | |
526 | ||
527 | if (!IN_SET(i->state, DNS_ZONE_ITEM_ESTABLISHED, DNS_ZONE_ITEM_VERIFYING)) { | |
528 | log_debug("Got a successful probe for not yet established RR, we lost."); | |
529 | we_lost = true; | |
530 | } else if (i->probe_transaction->scope->protocol == DNS_PROTOCOL_LLMNR) { | |
531 | assert(i->probe_transaction->received); | |
532 | we_lost = memcmp(&i->probe_transaction->received->sender, &i->probe_transaction->received->destination, FAMILY_ADDRESS_SIZE(i->probe_transaction->received->family)) < 0; | |
533 | if (we_lost) | |
534 | log_debug("Got a successful probe reply for an established RR, and we have a lexicographically larger IP address and thus lost."); | |
535 | } | |
536 | ||
537 | if (we_lost) { | |
538 | dns_zone_item_conflict(i); | |
539 | return; | |
540 | } | |
541 | ||
542 | log_debug("Got a successful probe reply, but peer has lexicographically lower IP address and thus lost."); | |
543 | } | |
544 | ||
545 | log_debug("Record %s successfully probed.", strna(dns_resource_record_to_string(i->rr))); | |
546 | ||
547 | dns_zone_item_probe_stop(i); | |
548 | i->state = DNS_ZONE_ITEM_ESTABLISHED; | |
549 | } | |
550 | ||
551 | static int dns_zone_item_verify(DnsZoneItem *i) { | |
552 | int r; | |
553 | ||
554 | assert(i); | |
555 | ||
556 | if (i->state != DNS_ZONE_ITEM_ESTABLISHED) | |
557 | return 0; | |
558 | ||
559 | log_debug("Verifying RR %s", strna(dns_resource_record_to_string(i->rr))); | |
560 | ||
561 | i->state = DNS_ZONE_ITEM_VERIFYING; | |
562 | r = dns_zone_item_probe_start(i); | |
563 | if (r < 0) { | |
564 | log_error_errno(r, "Failed to start probing for verifying RR: %m"); | |
565 | i->state = DNS_ZONE_ITEM_ESTABLISHED; | |
566 | return r; | |
567 | } | |
568 | ||
569 | return 0; | |
570 | } | |
571 | ||
572 | int dns_zone_check_conflicts(DnsZone *zone, DnsResourceRecord *rr) { | |
573 | DnsZoneItem *i, *first; | |
574 | int c = 0; | |
575 | ||
576 | assert(zone); | |
577 | assert(rr); | |
578 | ||
579 | /* This checks whether a response RR we received from somebody | |
580 | * else is one that we actually thought was uniquely ours. If | |
581 | * so, we'll verify our RRs. */ | |
582 | ||
583 | /* No conflict if we don't have the name at all. */ | |
584 | first = hashmap_get(zone->by_name, dns_resource_key_name(rr->key)); | |
585 | if (!first) | |
586 | return 0; | |
587 | ||
588 | /* No conflict if we have the exact same RR */ | |
589 | if (dns_zone_get(zone, rr)) | |
590 | return 0; | |
591 | ||
592 | /* No conflict if it is DNS-SD RR used for service enumeration. */ | |
593 | if (dns_resource_key_is_dnssd_ptr(rr->key)) | |
594 | return 0; | |
595 | ||
596 | /* OK, somebody else has RRs for the same name. Yuck! Let's | |
597 | * start probing again */ | |
598 | ||
599 | LIST_FOREACH(by_name, i, first) { | |
600 | if (dns_resource_record_equal(i->rr, rr)) | |
601 | continue; | |
602 | ||
603 | dns_zone_item_verify(i); | |
604 | c++; | |
605 | } | |
606 | ||
607 | return c; | |
608 | } | |
609 | ||
610 | int dns_zone_verify_conflicts(DnsZone *zone, DnsResourceKey *key) { | |
611 | DnsZoneItem *i, *first; | |
612 | int c = 0; | |
613 | ||
614 | assert(zone); | |
615 | ||
616 | /* Somebody else notified us about a possible conflict. Let's | |
617 | * verify if that's true. */ | |
618 | ||
619 | first = hashmap_get(zone->by_name, dns_resource_key_name(key)); | |
620 | if (!first) | |
621 | return 0; | |
622 | ||
623 | LIST_FOREACH(by_name, i, first) { | |
624 | dns_zone_item_verify(i); | |
625 | c++; | |
626 | } | |
627 | ||
628 | return c; | |
629 | } | |
630 | ||
631 | void dns_zone_verify_all(DnsZone *zone) { | |
632 | DnsZoneItem *i; | |
633 | Iterator iterator; | |
634 | ||
635 | assert(zone); | |
636 | ||
637 | HASHMAP_FOREACH(i, zone->by_key, iterator) { | |
638 | DnsZoneItem *j; | |
639 | ||
640 | LIST_FOREACH(by_key, j, i) | |
641 | dns_zone_item_verify(j); | |
642 | } | |
643 | } | |
644 | ||
645 | void dns_zone_dump(DnsZone *zone, FILE *f) { | |
646 | Iterator iterator; | |
647 | DnsZoneItem *i; | |
648 | ||
649 | if (!zone) | |
650 | return; | |
651 | ||
652 | if (!f) | |
653 | f = stdout; | |
654 | ||
655 | HASHMAP_FOREACH(i, zone->by_key, iterator) { | |
656 | DnsZoneItem *j; | |
657 | ||
658 | LIST_FOREACH(by_key, j, i) { | |
659 | const char *t; | |
660 | ||
661 | t = dns_resource_record_to_string(j->rr); | |
662 | if (!t) { | |
663 | log_oom(); | |
664 | continue; | |
665 | } | |
666 | ||
667 | fputc('\t', f); | |
668 | fputs(t, f); | |
669 | fputc('\n', f); | |
670 | } | |
671 | } | |
672 | } | |
673 | ||
674 | bool dns_zone_is_empty(DnsZone *zone) { | |
675 | if (!zone) | |
676 | return true; | |
677 | ||
678 | return hashmap_isempty(zone->by_key); | |
679 | } | |
680 | ||
681 | bool dns_zone_contains_name(DnsZone *z, const char *name) { | |
682 | DnsZoneItem *i, *first; | |
683 | ||
684 | first = hashmap_get(z->by_name, name); | |
685 | if (!first) | |
686 | return false; | |
687 | ||
688 | LIST_FOREACH(by_name, i, first) { | |
689 | if (!IN_SET(i->state, DNS_ZONE_ITEM_PROBING, DNS_ZONE_ITEM_ESTABLISHED, DNS_ZONE_ITEM_VERIFYING)) | |
690 | continue; | |
691 | ||
692 | return true; | |
693 | } | |
694 | ||
695 | return false; | |
696 | } |