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Commit | Line | Data |
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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
74b2466e | 2 | |
b5efdb8a | 3 | #include "alloc-util.h" |
2a1037af | 4 | #include "dns-domain.h" |
011696f7 | 5 | #include "dns-type.h" |
b5efdb8a | 6 | #include "hostname-util.h" |
78c6a153 | 7 | #include "local-addresses.h" |
74b2466e | 8 | #include "resolved-dns-query.h" |
839a4a20 | 9 | #include "resolved-dns-synthesize.h" |
dd0bc0f1 | 10 | #include "resolved-etc-hosts.h" |
23b298bc | 11 | #include "string-util.h" |
74b2466e | 12 | |
8ba9fd9c | 13 | #define CNAME_MAX 8 |
39762fdf | 14 | #define QUERIES_MAX 2048 |
45ec7efb | 15 | #define AUXILIARY_QUERIES_MAX 64 |
8ba9fd9c | 16 | |
801ad6a6 LP |
17 | static int dns_query_candidate_new(DnsQueryCandidate **ret, DnsQuery *q, DnsScope *s) { |
18 | DnsQueryCandidate *c; | |
74b2466e | 19 | |
801ad6a6 | 20 | assert(ret); |
faa133f3 | 21 | assert(q); |
801ad6a6 | 22 | assert(s); |
74b2466e | 23 | |
801ad6a6 LP |
24 | c = new0(DnsQueryCandidate, 1); |
25 | if (!c) | |
26 | return -ENOMEM; | |
27 | ||
28 | c->query = q; | |
29 | c->scope = s; | |
30 | ||
31 | LIST_PREPEND(candidates_by_query, q->candidates, c); | |
32 | LIST_PREPEND(candidates_by_scope, s->query_candidates, c); | |
33 | ||
34 | *ret = c; | |
35 | return 0; | |
36 | } | |
37 | ||
38 | static void dns_query_candidate_stop(DnsQueryCandidate *c) { | |
39 | DnsTransaction *t; | |
74b2466e | 40 | |
801ad6a6 LP |
41 | assert(c); |
42 | ||
43 | while ((t = set_steal_first(c->transactions))) { | |
547973de | 44 | set_remove(t->notify_query_candidates, c); |
35aa04e9 | 45 | set_remove(t->notify_query_candidates_done, c); |
ec2c5e43 | 46 | dns_transaction_gc(t); |
74b2466e | 47 | } |
74b2466e LP |
48 | } |
49 | ||
801ad6a6 LP |
50 | DnsQueryCandidate* dns_query_candidate_free(DnsQueryCandidate *c) { |
51 | ||
52 | if (!c) | |
53 | return NULL; | |
54 | ||
55 | dns_query_candidate_stop(c); | |
56 | ||
57 | set_free(c->transactions); | |
58 | dns_search_domain_unref(c->search_domain); | |
59 | ||
60 | if (c->query) | |
61 | LIST_REMOVE(candidates_by_query, c->query->candidates, c); | |
62 | ||
63 | if (c->scope) | |
64 | LIST_REMOVE(candidates_by_scope, c->scope->query_candidates, c); | |
65 | ||
6b430fdb | 66 | return mfree(c); |
801ad6a6 LP |
67 | } |
68 | ||
69 | static int dns_query_candidate_next_search_domain(DnsQueryCandidate *c) { | |
801ad6a6 LP |
70 | DnsSearchDomain *next = NULL; |
71 | ||
72 | assert(c); | |
73 | ||
ad44b56b | 74 | if (c->search_domain && c->search_domain->linked) |
801ad6a6 | 75 | next = c->search_domain->domains_next; |
ad44b56b LP |
76 | else |
77 | next = dns_scope_get_search_domains(c->scope); | |
801ad6a6 | 78 | |
ad44b56b | 79 | for (;;) { |
6627b7e2 LP |
80 | if (!next) /* We hit the end of the list */ |
81 | return 0; | |
801ad6a6 | 82 | |
ad44b56b LP |
83 | if (!next->route_only) |
84 | break; | |
801ad6a6 | 85 | |
ad44b56b LP |
86 | /* Skip over route-only domains */ |
87 | next = next->domains_next; | |
801ad6a6 LP |
88 | } |
89 | ||
90 | dns_search_domain_unref(c->search_domain); | |
91 | c->search_domain = dns_search_domain_ref(next); | |
6627b7e2 | 92 | |
801ad6a6 LP |
93 | return 1; |
94 | } | |
95 | ||
96 | static int dns_query_candidate_add_transaction(DnsQueryCandidate *c, DnsResourceKey *key) { | |
29bd6012 | 97 | _cleanup_(dns_transaction_gcp) DnsTransaction *t = NULL; |
801ad6a6 LP |
98 | int r; |
99 | ||
100 | assert(c); | |
101 | assert(key); | |
102 | ||
801ad6a6 LP |
103 | t = dns_scope_find_transaction(c->scope, key, true); |
104 | if (!t) { | |
105 | r = dns_transaction_new(&t, c->scope, key); | |
106 | if (r < 0) | |
107 | return r; | |
29bd6012 ZJS |
108 | } else if (set_contains(c->transactions, t)) |
109 | return 0; | |
801ad6a6 | 110 | |
35aa04e9 LP |
111 | r = set_ensure_allocated(&t->notify_query_candidates_done, NULL); |
112 | if (r < 0) | |
29bd6012 | 113 | return r; |
35aa04e9 | 114 | |
de7fef4b | 115 | r = set_ensure_put(&t->notify_query_candidates, NULL, c); |
801ad6a6 | 116 | if (r < 0) |
29bd6012 | 117 | return r; |
801ad6a6 | 118 | |
de7fef4b | 119 | r = set_ensure_put(&c->transactions, NULL, t); |
801ad6a6 | 120 | if (r < 0) { |
547973de | 121 | (void) set_remove(t->notify_query_candidates, c); |
29bd6012 | 122 | return r; |
801ad6a6 LP |
123 | } |
124 | ||
17c8de63 | 125 | t->clamp_ttl = c->query->clamp_ttl; |
29bd6012 | 126 | TAKE_PTR(t); |
547973de | 127 | return 1; |
801ad6a6 LP |
128 | } |
129 | ||
130 | static int dns_query_candidate_go(DnsQueryCandidate *c) { | |
131 | DnsTransaction *t; | |
132 | Iterator i; | |
133 | int r; | |
011696f7 | 134 | unsigned n = 0; |
801ad6a6 LP |
135 | |
136 | assert(c); | |
137 | ||
138 | /* Start the transactions that are not started yet */ | |
139 | SET_FOREACH(t, c->transactions, i) { | |
140 | if (t->state != DNS_TRANSACTION_NULL) | |
141 | continue; | |
142 | ||
143 | r = dns_transaction_go(t); | |
144 | if (r < 0) | |
145 | return r; | |
011696f7 LP |
146 | |
147 | n++; | |
801ad6a6 LP |
148 | } |
149 | ||
011696f7 LP |
150 | /* If there was nothing to start, then let's proceed immediately */ |
151 | if (n == 0) | |
152 | dns_query_candidate_notify(c); | |
153 | ||
801ad6a6 LP |
154 | return 0; |
155 | } | |
156 | ||
157 | static DnsTransactionState dns_query_candidate_state(DnsQueryCandidate *c) { | |
158 | DnsTransactionState state = DNS_TRANSACTION_NO_SERVERS; | |
159 | DnsTransaction *t; | |
160 | Iterator i; | |
161 | ||
162 | assert(c); | |
163 | ||
164 | if (c->error_code != 0) | |
7cc6ed7b | 165 | return DNS_TRANSACTION_ERRNO; |
801ad6a6 LP |
166 | |
167 | SET_FOREACH(t, c->transactions, i) { | |
168 | ||
169 | switch (t->state) { | |
170 | ||
5264131a LP |
171 | case DNS_TRANSACTION_NULL: |
172 | /* If there's a NULL transaction pending, then | |
173 | * this means not all transactions where | |
174 | * started yet, and we were called from within | |
175 | * the stackframe that is supposed to start | |
176 | * remaining transactions. In this case, | |
177 | * simply claim the candidate is pending. */ | |
178 | ||
801ad6a6 | 179 | case DNS_TRANSACTION_PENDING: |
547973de LP |
180 | case DNS_TRANSACTION_VALIDATING: |
181 | /* If there's one transaction currently in | |
182 | * VALIDATING state, then this means there's | |
183 | * also one in PENDING state, hence we can | |
184 | * return PENDING immediately. */ | |
185 | return DNS_TRANSACTION_PENDING; | |
801ad6a6 LP |
186 | |
187 | case DNS_TRANSACTION_SUCCESS: | |
188 | state = t->state; | |
189 | break; | |
190 | ||
191 | default: | |
192 | if (state != DNS_TRANSACTION_SUCCESS) | |
193 | state = t->state; | |
194 | ||
195 | break; | |
196 | } | |
197 | } | |
198 | ||
199 | return state; | |
200 | } | |
201 | ||
202 | static int dns_query_candidate_setup_transactions(DnsQueryCandidate *c) { | |
23b298bc | 203 | DnsQuestion *question; |
801ad6a6 LP |
204 | DnsResourceKey *key; |
205 | int n = 0, r; | |
206 | ||
207 | assert(c); | |
208 | ||
209 | dns_query_candidate_stop(c); | |
210 | ||
23b298bc LP |
211 | question = dns_query_question_for_protocol(c->query, c->scope->protocol); |
212 | ||
801ad6a6 | 213 | /* Create one transaction per question key */ |
23b298bc | 214 | DNS_QUESTION_FOREACH(key, question) { |
801ad6a6 | 215 | _cleanup_(dns_resource_key_unrefp) DnsResourceKey *new_key = NULL; |
011696f7 LP |
216 | DnsResourceKey *qkey; |
217 | ||
801ad6a6 LP |
218 | if (c->search_domain) { |
219 | r = dns_resource_key_new_append_suffix(&new_key, key, c->search_domain->name); | |
220 | if (r < 0) | |
221 | goto fail; | |
801ad6a6 | 222 | |
011696f7 LP |
223 | qkey = new_key; |
224 | } else | |
225 | qkey = key; | |
226 | ||
227 | if (!dns_scope_good_key(c->scope, qkey)) | |
228 | continue; | |
229 | ||
230 | r = dns_query_candidate_add_transaction(c, qkey); | |
801ad6a6 LP |
231 | if (r < 0) |
232 | goto fail; | |
233 | ||
234 | n++; | |
235 | } | |
236 | ||
237 | return n; | |
238 | ||
239 | fail: | |
240 | dns_query_candidate_stop(c); | |
241 | return r; | |
242 | } | |
243 | ||
547973de | 244 | void dns_query_candidate_notify(DnsQueryCandidate *c) { |
801ad6a6 LP |
245 | DnsTransactionState state; |
246 | int r; | |
247 | ||
248 | assert(c); | |
249 | ||
250 | state = dns_query_candidate_state(c); | |
251 | ||
547973de | 252 | if (DNS_TRANSACTION_IS_LIVE(state)) |
801ad6a6 LP |
253 | return; |
254 | ||
255 | if (state != DNS_TRANSACTION_SUCCESS && c->search_domain) { | |
256 | ||
257 | r = dns_query_candidate_next_search_domain(c); | |
258 | if (r < 0) | |
259 | goto fail; | |
260 | ||
261 | if (r > 0) { | |
262 | /* OK, there's another search domain to try, let's do so. */ | |
263 | ||
264 | r = dns_query_candidate_setup_transactions(c); | |
265 | if (r < 0) | |
266 | goto fail; | |
267 | ||
268 | if (r > 0) { | |
269 | /* New transactions where queued. Start them and wait */ | |
270 | ||
271 | r = dns_query_candidate_go(c); | |
272 | if (r < 0) | |
273 | goto fail; | |
274 | ||
275 | return; | |
276 | } | |
277 | } | |
278 | ||
279 | } | |
280 | ||
281 | dns_query_ready(c->query); | |
282 | return; | |
283 | ||
284 | fail: | |
285 | log_warning_errno(r, "Failed to follow search domains: %m"); | |
286 | c->error_code = r; | |
287 | dns_query_ready(c->query); | |
288 | } | |
289 | ||
290 | static void dns_query_stop(DnsQuery *q) { | |
291 | DnsQueryCandidate *c; | |
292 | ||
293 | assert(q); | |
294 | ||
295 | q->timeout_event_source = sd_event_source_unref(q->timeout_event_source); | |
296 | ||
297 | LIST_FOREACH(candidates_by_query, c, q->candidates) | |
298 | dns_query_candidate_stop(c); | |
299 | } | |
300 | ||
7820b320 LP |
301 | static void dns_query_free_candidates(DnsQuery *q) { |
302 | assert(q); | |
303 | ||
304 | while (q->candidates) | |
305 | dns_query_candidate_free(q->candidates); | |
306 | } | |
307 | ||
308 | static void dns_query_reset_answer(DnsQuery *q) { | |
309 | assert(q); | |
310 | ||
311 | q->answer = dns_answer_unref(q->answer); | |
312 | q->answer_rcode = 0; | |
313 | q->answer_dnssec_result = _DNSSEC_RESULT_INVALID; | |
7cc6ed7b | 314 | q->answer_errno = 0; |
7820b320 LP |
315 | q->answer_authenticated = false; |
316 | q->answer_protocol = _DNS_PROTOCOL_INVALID; | |
317 | q->answer_family = AF_UNSPEC; | |
318 | q->answer_search_domain = dns_search_domain_unref(q->answer_search_domain); | |
319 | } | |
320 | ||
74b2466e | 321 | DnsQuery *dns_query_free(DnsQuery *q) { |
74b2466e LP |
322 | if (!q) |
323 | return NULL; | |
324 | ||
45ec7efb LP |
325 | while (q->auxiliary_queries) |
326 | dns_query_free(q->auxiliary_queries); | |
327 | ||
328 | if (q->auxiliary_for) { | |
329 | assert(q->auxiliary_for->n_auxiliary_queries > 0); | |
330 | q->auxiliary_for->n_auxiliary_queries--; | |
331 | LIST_REMOVE(auxiliary_queries, q->auxiliary_for->auxiliary_queries, q); | |
332 | } | |
333 | ||
7820b320 | 334 | dns_query_free_candidates(q); |
322345fd | 335 | |
23b298bc LP |
336 | dns_question_unref(q->question_idna); |
337 | dns_question_unref(q->question_utf8); | |
7820b320 LP |
338 | |
339 | dns_query_reset_answer(q); | |
322345fd | 340 | |
ec2c5e43 | 341 | sd_bus_message_unref(q->request); |
82bd6ddd | 342 | sd_bus_track_unref(q->bus_track); |
74b2466e | 343 | |
b30bf55d | 344 | dns_packet_unref(q->request_dns_packet); |
e8d23f92 | 345 | dns_packet_unref(q->reply_dns_packet); |
b30bf55d LP |
346 | |
347 | if (q->request_dns_stream) { | |
348 | /* Detach the stream from our query, in case something else keeps a reference to it. */ | |
b412af57 LP |
349 | (void) set_remove(q->request_dns_stream->queries, q); |
350 | q->request_dns_stream = dns_stream_unref(q->request_dns_stream); | |
b30bf55d LP |
351 | } |
352 | ||
23b298bc LP |
353 | free(q->request_address_string); |
354 | ||
39762fdf | 355 | if (q->manager) { |
74b2466e | 356 | LIST_REMOVE(queries, q->manager->dns_queries, q); |
39762fdf LP |
357 | q->manager->n_dns_queries--; |
358 | } | |
74b2466e | 359 | |
6b430fdb | 360 | return mfree(q); |
74b2466e LP |
361 | } |
362 | ||
23b298bc LP |
363 | int dns_query_new( |
364 | Manager *m, | |
365 | DnsQuery **ret, | |
366 | DnsQuestion *question_utf8, | |
367 | DnsQuestion *question_idna, | |
17c8de63 LP |
368 | int ifindex, |
369 | uint64_t flags) { | |
23b298bc | 370 | |
74b2466e | 371 | _cleanup_(dns_query_freep) DnsQuery *q = NULL; |
23b298bc LP |
372 | DnsResourceKey *key; |
373 | bool good = false; | |
faa133f3 | 374 | int r; |
202b76ae | 375 | char key_str[DNS_RESOURCE_KEY_STRING_MAX]; |
74b2466e LP |
376 | |
377 | assert(m); | |
378 | ||
23b298bc LP |
379 | if (dns_question_size(question_utf8) > 0) { |
380 | r = dns_question_is_valid_for_query(question_utf8); | |
381 | if (r < 0) | |
382 | return r; | |
383 | if (r == 0) | |
384 | return -EINVAL; | |
385 | ||
386 | good = true; | |
387 | } | |
388 | ||
389 | /* If the IDNA and UTF8 questions are the same, merge their references */ | |
390 | r = dns_question_is_equal(question_idna, question_utf8); | |
faa133f3 LP |
391 | if (r < 0) |
392 | return r; | |
23b298bc LP |
393 | if (r > 0) |
394 | question_idna = question_utf8; | |
395 | else { | |
396 | if (dns_question_size(question_idna) > 0) { | |
397 | r = dns_question_is_valid_for_query(question_idna); | |
398 | if (r < 0) | |
399 | return r; | |
400 | if (r == 0) | |
401 | return -EINVAL; | |
402 | ||
403 | good = true; | |
404 | } | |
405 | } | |
406 | ||
407 | if (!good) /* don't allow empty queries */ | |
408 | return -EINVAL; | |
74b2466e | 409 | |
39762fdf LP |
410 | if (m->n_dns_queries >= QUERIES_MAX) |
411 | return -EBUSY; | |
412 | ||
74b2466e LP |
413 | q = new0(DnsQuery, 1); |
414 | if (!q) | |
415 | return -ENOMEM; | |
416 | ||
23b298bc LP |
417 | q->question_utf8 = dns_question_ref(question_utf8); |
418 | q->question_idna = dns_question_ref(question_idna); | |
51323288 LP |
419 | q->ifindex = ifindex; |
420 | q->flags = flags; | |
7820b320 | 421 | q->answer_dnssec_result = _DNSSEC_RESULT_INVALID; |
801ad6a6 | 422 | q->answer_protocol = _DNS_PROTOCOL_INVALID; |
7820b320 | 423 | q->answer_family = AF_UNSPEC; |
322345fd | 424 | |
23b298bc | 425 | /* First dump UTF8 question */ |
202b76ae ZJS |
426 | DNS_QUESTION_FOREACH(key, question_utf8) |
427 | log_debug("Looking up RR for %s.", | |
428 | dns_resource_key_to_string(key, key_str, sizeof key_str)); | |
23b298bc LP |
429 | |
430 | /* And then dump the IDNA question, but only what hasn't been dumped already through the UTF8 question. */ | |
431 | DNS_QUESTION_FOREACH(key, question_idna) { | |
23b298bc LP |
432 | r = dns_question_contains(question_utf8, key); |
433 | if (r < 0) | |
434 | return r; | |
435 | if (r > 0) | |
436 | continue; | |
437 | ||
202b76ae ZJS |
438 | log_debug("Looking up IDNA RR for %s.", |
439 | dns_resource_key_to_string(key, key_str, sizeof key_str)); | |
74b2466e LP |
440 | } |
441 | ||
442 | LIST_PREPEND(queries, m->dns_queries, q); | |
39762fdf | 443 | m->n_dns_queries++; |
74b2466e LP |
444 | q->manager = m; |
445 | ||
8ba9fd9c LP |
446 | if (ret) |
447 | *ret = q; | |
448 | q = NULL; | |
449 | ||
450 | return 0; | |
451 | } | |
452 | ||
45ec7efb LP |
453 | int dns_query_make_auxiliary(DnsQuery *q, DnsQuery *auxiliary_for) { |
454 | assert(q); | |
455 | assert(auxiliary_for); | |
456 | ||
61233823 | 457 | /* Ensure that the query is not auxiliary yet, and |
45ec7efb LP |
458 | * nothing else is auxiliary to it either */ |
459 | assert(!q->auxiliary_for); | |
460 | assert(!q->auxiliary_queries); | |
461 | ||
462 | /* Ensure that the unit we shall be made auxiliary for isn't | |
463 | * auxiliary itself */ | |
464 | assert(!auxiliary_for->auxiliary_for); | |
465 | ||
466 | if (auxiliary_for->n_auxiliary_queries >= AUXILIARY_QUERIES_MAX) | |
467 | return -EAGAIN; | |
468 | ||
469 | LIST_PREPEND(auxiliary_queries, auxiliary_for->auxiliary_queries, q); | |
470 | q->auxiliary_for = auxiliary_for; | |
471 | ||
472 | auxiliary_for->n_auxiliary_queries++; | |
473 | return 0; | |
474 | } | |
475 | ||
ec2c5e43 | 476 | static void dns_query_complete(DnsQuery *q, DnsTransactionState state) { |
8ba9fd9c | 477 | assert(q); |
547973de LP |
478 | assert(!DNS_TRANSACTION_IS_LIVE(state)); |
479 | assert(DNS_TRANSACTION_IS_LIVE(q->state)); | |
8ba9fd9c | 480 | |
322345fd LP |
481 | /* Note that this call might invalidate the query. Callers |
482 | * should hence not attempt to access the query or transaction | |
483 | * after calling this function. */ | |
8ba9fd9c | 484 | |
8ba9fd9c LP |
485 | q->state = state; |
486 | ||
322345fd LP |
487 | dns_query_stop(q); |
488 | if (q->complete) | |
489 | q->complete(q); | |
8ba9fd9c LP |
490 | } |
491 | ||
492 | static int on_query_timeout(sd_event_source *s, usec_t usec, void *userdata) { | |
493 | DnsQuery *q = userdata; | |
494 | ||
495 | assert(s); | |
496 | assert(q); | |
497 | ||
ec2c5e43 | 498 | dns_query_complete(q, DNS_TRANSACTION_TIMEOUT); |
8ba9fd9c LP |
499 | return 0; |
500 | } | |
501 | ||
801ad6a6 | 502 | static int dns_query_add_candidate(DnsQuery *q, DnsScope *s) { |
7877e5ca | 503 | _cleanup_(dns_query_candidate_freep) DnsQueryCandidate *c = NULL; |
faa133f3 LP |
504 | int r; |
505 | ||
506 | assert(q); | |
ec2c5e43 | 507 | assert(s); |
faa133f3 | 508 | |
801ad6a6 | 509 | r = dns_query_candidate_new(&c, q, s); |
faa133f3 LP |
510 | if (r < 0) |
511 | return r; | |
512 | ||
801ad6a6 | 513 | /* If this a single-label domain on DNS, we might append a suitable search domain first. */ |
3b5bd7d6 ZJS |
514 | if (!FLAGS_SET(q->flags, SD_RESOLVED_NO_SEARCH) && |
515 | dns_scope_name_wants_search_domain(s, dns_question_first_name(q->question_idna))) { | |
516 | /* OK, we want a search domain now. Let's find one for this scope */ | |
22f711bb | 517 | |
6da95857 | 518 | r = dns_query_candidate_next_search_domain(c); |
3b5bd7d6 | 519 | if (r < 0) |
7877e5ca | 520 | return r; |
faa133f3 LP |
521 | } |
522 | ||
801ad6a6 LP |
523 | r = dns_query_candidate_setup_transactions(c); |
524 | if (r < 0) | |
7877e5ca | 525 | return r; |
801ad6a6 | 526 | |
7877e5ca | 527 | TAKE_PTR(c); |
faa133f3 | 528 | return 0; |
faa133f3 LP |
529 | } |
530 | ||
78c6a153 | 531 | static int dns_query_synthesize_reply(DnsQuery *q, DnsTransactionState *state) { |
2a1037af | 532 | _cleanup_(dns_answer_unrefp) DnsAnswer *answer = NULL; |
dd0bc0f1 | 533 | int r; |
2a1037af LP |
534 | |
535 | assert(q); | |
536 | assert(state); | |
537 | ||
dd0bc0f1 LP |
538 | /* Tries to synthesize localhost RR replies (and others) where appropriate. Note that this is done *after* the |
539 | * the normal lookup finished. The data from the network hence takes precedence over the data we | |
540 | * synthesize. (But note that many scopes refuse to resolve certain domain names) */ | |
2a1037af LP |
541 | |
542 | if (!IN_SET(*state, | |
3bbdc31d | 543 | DNS_TRANSACTION_RCODE_FAILURE, |
2a1037af LP |
544 | DNS_TRANSACTION_NO_SERVERS, |
545 | DNS_TRANSACTION_TIMEOUT, | |
edbcc1fd | 546 | DNS_TRANSACTION_ATTEMPTS_MAX_REACHED, |
0791110f LP |
547 | DNS_TRANSACTION_NETWORK_DOWN, |
548 | DNS_TRANSACTION_NOT_FOUND)) | |
78c6a153 | 549 | return 0; |
2a1037af | 550 | |
839a4a20 LP |
551 | r = dns_synthesize_answer( |
552 | q->manager, | |
553 | q->question_utf8, | |
554 | q->ifindex, | |
dd0bc0f1 | 555 | &answer); |
acf06088 LP |
556 | if (r == -ENXIO) { |
557 | /* If we get ENXIO this tells us to generate NXDOMAIN unconditionally. */ | |
2a1037af | 558 | |
acf06088 LP |
559 | dns_query_reset_answer(q); |
560 | q->answer_rcode = DNS_RCODE_NXDOMAIN; | |
561 | q->answer_protocol = dns_synthesize_protocol(q->flags); | |
562 | q->answer_family = dns_synthesize_family(q->flags); | |
563 | q->answer_authenticated = true; | |
564 | *state = DNS_TRANSACTION_RCODE_FAILURE; | |
565 | ||
566 | return 0; | |
567 | } | |
839a4a20 LP |
568 | if (r <= 0) |
569 | return r; | |
2a1037af | 570 | |
839a4a20 | 571 | dns_query_reset_answer(q); |
2a1037af | 572 | |
1cc6c93a | 573 | q->answer = TAKE_PTR(answer); |
2a1037af | 574 | q->answer_rcode = DNS_RCODE_SUCCESS; |
dd0bc0f1 LP |
575 | q->answer_protocol = dns_synthesize_protocol(q->flags); |
576 | q->answer_family = dns_synthesize_family(q->flags); | |
839a4a20 | 577 | q->answer_authenticated = true; |
2a1037af LP |
578 | |
579 | *state = DNS_TRANSACTION_SUCCESS; | |
78c6a153 LP |
580 | |
581 | return 1; | |
2a1037af LP |
582 | } |
583 | ||
dd0bc0f1 LP |
584 | static int dns_query_try_etc_hosts(DnsQuery *q) { |
585 | _cleanup_(dns_answer_unrefp) DnsAnswer *answer = NULL; | |
586 | int r; | |
587 | ||
588 | assert(q); | |
589 | ||
590 | /* Looks in /etc/hosts for matching entries. Note that this is done *before* the normal lookup is done. The | |
591 | * data from /etc/hosts hence takes precedence over the network. */ | |
592 | ||
593 | r = manager_etc_hosts_lookup( | |
594 | q->manager, | |
595 | q->question_utf8, | |
596 | &answer); | |
597 | if (r <= 0) | |
598 | return r; | |
599 | ||
600 | dns_query_reset_answer(q); | |
601 | ||
1cc6c93a | 602 | q->answer = TAKE_PTR(answer); |
dd0bc0f1 LP |
603 | q->answer_rcode = DNS_RCODE_SUCCESS; |
604 | q->answer_protocol = dns_synthesize_protocol(q->flags); | |
605 | q->answer_family = dns_synthesize_family(q->flags); | |
606 | q->answer_authenticated = true; | |
607 | ||
608 | return 1; | |
609 | } | |
610 | ||
322345fd | 611 | int dns_query_go(DnsQuery *q) { |
8ba9fd9c LP |
612 | DnsScopeMatch found = DNS_SCOPE_NO; |
613 | DnsScope *s, *first = NULL; | |
801ad6a6 | 614 | DnsQueryCandidate *c; |
8ba9fd9c LP |
615 | int r; |
616 | ||
617 | assert(q); | |
618 | ||
ec2c5e43 | 619 | if (q->state != DNS_TRANSACTION_NULL) |
8ba9fd9c LP |
620 | return 0; |
621 | ||
dd0bc0f1 LP |
622 | r = dns_query_try_etc_hosts(q); |
623 | if (r < 0) | |
624 | return r; | |
625 | if (r > 0) { | |
626 | dns_query_complete(q, DNS_TRANSACTION_SUCCESS); | |
627 | return 1; | |
628 | } | |
629 | ||
8ba9fd9c | 630 | LIST_FOREACH(scopes, s, q->manager->dns_scopes) { |
74b2466e | 631 | DnsScopeMatch match; |
23b298bc LP |
632 | const char *name; |
633 | ||
634 | name = dns_question_first_name(dns_query_question_for_protocol(q, s->protocol)); | |
635 | if (!name) | |
636 | continue; | |
74b2466e | 637 | |
51323288 | 638 | match = dns_scope_good_domain(s, q->ifindex, q->flags, name); |
a97a3b25 LP |
639 | if (match < 0) { |
640 | log_debug("Couldn't check if '%s' matches against scope, ignoring.", name); | |
74b2466e | 641 | continue; |
a97a3b25 | 642 | } |
74b2466e | 643 | |
a97a3b25 LP |
644 | if (match > found) { /* Does this match better? If so, remember how well it matched, and the first one |
645 | * that matches this well */ | |
646 | found = match; | |
74b2466e | 647 | first = s; |
74b2466e LP |
648 | } |
649 | } | |
650 | ||
2a1037af LP |
651 | if (found == DNS_SCOPE_NO) { |
652 | DnsTransactionState state = DNS_TRANSACTION_NO_SERVERS; | |
653 | ||
7cc6ed7b LP |
654 | r = dns_query_synthesize_reply(q, &state); |
655 | if (r < 0) | |
656 | return r; | |
657 | ||
d634711b LP |
658 | dns_query_complete(q, state); |
659 | return 1; | |
2a1037af | 660 | } |
74b2466e | 661 | |
801ad6a6 | 662 | r = dns_query_add_candidate(q, first); |
74b2466e | 663 | if (r < 0) |
ec2c5e43 | 664 | goto fail; |
74b2466e | 665 | |
74b2466e LP |
666 | LIST_FOREACH(scopes, s, first->scopes_next) { |
667 | DnsScopeMatch match; | |
23b298bc LP |
668 | const char *name; |
669 | ||
670 | name = dns_question_first_name(dns_query_question_for_protocol(q, s->protocol)); | |
671 | if (!name) | |
672 | continue; | |
74b2466e | 673 | |
51323288 | 674 | match = dns_scope_good_domain(s, q->ifindex, q->flags, name); |
a97a3b25 | 675 | if (match < 0) { |
4605de11 | 676 | log_debug("Couldn't check if '%s' matches against scope, ignoring.", name); |
a97a3b25 LP |
677 | continue; |
678 | } | |
74b2466e | 679 | |
a97a3b25 | 680 | if (match < found) |
74b2466e LP |
681 | continue; |
682 | ||
801ad6a6 | 683 | r = dns_query_add_candidate(q, s); |
74b2466e | 684 | if (r < 0) |
ec2c5e43 | 685 | goto fail; |
74b2466e LP |
686 | } |
687 | ||
ab88b6d0 | 688 | dns_query_reset_answer(q); |
74b2466e | 689 | |
39cf0351 | 690 | r = sd_event_add_time_relative( |
9a015429 LP |
691 | q->manager->event, |
692 | &q->timeout_event_source, | |
693 | clock_boottime_or_monotonic(), | |
39cf0351 | 694 | SD_RESOLVED_QUERY_TIMEOUT_USEC, |
4cbfd62b | 695 | 0, on_query_timeout, q); |
74b2466e LP |
696 | if (r < 0) |
697 | goto fail; | |
698 | ||
aa4a9deb LP |
699 | (void) sd_event_source_set_description(q->timeout_event_source, "query-timeout"); |
700 | ||
ec2c5e43 | 701 | q->state = DNS_TRANSACTION_PENDING; |
faa133f3 | 702 | q->block_ready++; |
74b2466e | 703 | |
801ad6a6 LP |
704 | /* Start the transactions */ |
705 | LIST_FOREACH(candidates_by_query, c, q->candidates) { | |
706 | r = dns_query_candidate_go(c); | |
707 | if (r < 0) { | |
708 | q->block_ready--; | |
ec2c5e43 | 709 | goto fail; |
801ad6a6 | 710 | } |
74b2466e LP |
711 | } |
712 | ||
faa133f3 LP |
713 | q->block_ready--; |
714 | dns_query_ready(q); | |
322345fd | 715 | |
8ba9fd9c | 716 | return 1; |
74b2466e LP |
717 | |
718 | fail: | |
8ba9fd9c | 719 | dns_query_stop(q); |
74b2466e LP |
720 | return r; |
721 | } | |
722 | ||
801ad6a6 | 723 | static void dns_query_accept(DnsQuery *q, DnsQueryCandidate *c) { |
ec2c5e43 | 724 | DnsTransactionState state = DNS_TRANSACTION_NO_SERVERS; |
547973de | 725 | bool has_authenticated = false, has_non_authenticated = false; |
019036a4 | 726 | DnssecResult dnssec_result_authenticated = _DNSSEC_RESULT_INVALID, dnssec_result_non_authenticated = _DNSSEC_RESULT_INVALID; |
801ad6a6 | 727 | DnsTransaction *t; |
faa133f3 | 728 | Iterator i; |
547973de | 729 | int r; |
74b2466e LP |
730 | |
731 | assert(q); | |
732 | ||
801ad6a6 | 733 | if (!c) { |
7cc6ed7b LP |
734 | r = dns_query_synthesize_reply(q, &state); |
735 | if (r < 0) | |
736 | goto fail; | |
737 | ||
801ad6a6 | 738 | dns_query_complete(q, state); |
74b2466e | 739 | return; |
801ad6a6 | 740 | } |
74b2466e | 741 | |
a7bf2ada LP |
742 | if (c->error_code != 0) { |
743 | /* If the candidate had an error condition of its own, start with that. */ | |
744 | state = DNS_TRANSACTION_ERRNO; | |
745 | q->answer = dns_answer_unref(q->answer); | |
746 | q->answer_rcode = 0; | |
747 | q->answer_dnssec_result = _DNSSEC_RESULT_INVALID; | |
cbb1aabb | 748 | q->answer_authenticated = false; |
a7bf2ada LP |
749 | q->answer_errno = c->error_code; |
750 | } | |
751 | ||
801ad6a6 | 752 | SET_FOREACH(t, c->transactions, i) { |
74b2466e | 753 | |
801ad6a6 | 754 | switch (t->state) { |
934e9b10 | 755 | |
801ad6a6 | 756 | case DNS_TRANSACTION_SUCCESS: { |
f8e2f4d6 | 757 | /* We found a successfully reply, merge it into the answer */ |
547973de | 758 | r = dns_answer_extend(&q->answer, t->answer); |
7cc6ed7b LP |
759 | if (r < 0) |
760 | goto fail; | |
019036a4 | 761 | |
ae6a4bbf | 762 | q->answer_rcode = t->answer_rcode; |
7cc6ed7b | 763 | q->answer_errno = 0; |
801ad6a6 | 764 | |
019036a4 | 765 | if (t->answer_authenticated) { |
931851e8 | 766 | has_authenticated = true; |
019036a4 LP |
767 | dnssec_result_authenticated = t->answer_dnssec_result; |
768 | } else { | |
931851e8 | 769 | has_non_authenticated = true; |
019036a4 LP |
770 | dnssec_result_non_authenticated = t->answer_dnssec_result; |
771 | } | |
931851e8 | 772 | |
801ad6a6 LP |
773 | state = DNS_TRANSACTION_SUCCESS; |
774 | break; | |
775 | } | |
776 | ||
801ad6a6 | 777 | case DNS_TRANSACTION_NULL: |
547973de LP |
778 | case DNS_TRANSACTION_PENDING: |
779 | case DNS_TRANSACTION_VALIDATING: | |
801ad6a6 LP |
780 | case DNS_TRANSACTION_ABORTED: |
781 | /* Ignore transactions that didn't complete */ | |
782 | continue; | |
783 | ||
784 | default: | |
cbb1aabb | 785 | /* Any kind of failure? Store the data away, if there's nothing stored yet. */ |
019036a4 LP |
786 | if (state == DNS_TRANSACTION_SUCCESS) |
787 | continue; | |
934e9b10 | 788 | |
cbb1aabb LP |
789 | /* If there's already an authenticated negative reply stored, then prefer that over any unauthenticated one */ |
790 | if (q->answer_authenticated && !t->answer_authenticated) | |
791 | continue; | |
792 | ||
d38d5ca6 | 793 | q->answer = dns_answer_unref(q->answer); |
019036a4 LP |
794 | q->answer_rcode = t->answer_rcode; |
795 | q->answer_dnssec_result = t->answer_dnssec_result; | |
cbb1aabb | 796 | q->answer_authenticated = t->answer_authenticated; |
7cc6ed7b | 797 | q->answer_errno = t->answer_errno; |
934e9b10 | 798 | |
019036a4 | 799 | state = t->state; |
801ad6a6 | 800 | break; |
74b2466e | 801 | } |
801ad6a6 | 802 | } |
74b2466e | 803 | |
019036a4 LP |
804 | if (state == DNS_TRANSACTION_SUCCESS) { |
805 | q->answer_authenticated = has_authenticated && !has_non_authenticated; | |
806 | q->answer_dnssec_result = q->answer_authenticated ? dnssec_result_authenticated : dnssec_result_non_authenticated; | |
807 | } | |
808 | ||
801ad6a6 LP |
809 | q->answer_protocol = c->scope->protocol; |
810 | q->answer_family = c->scope->family; | |
934e9b10 | 811 | |
801ad6a6 LP |
812 | dns_search_domain_unref(q->answer_search_domain); |
813 | q->answer_search_domain = dns_search_domain_ref(c->search_domain); | |
7e8e0422 | 814 | |
7cc6ed7b LP |
815 | r = dns_query_synthesize_reply(q, &state); |
816 | if (r < 0) | |
817 | goto fail; | |
818 | ||
801ad6a6 | 819 | dns_query_complete(q, state); |
7cc6ed7b LP |
820 | return; |
821 | ||
822 | fail: | |
823 | q->answer_errno = -r; | |
824 | dns_query_complete(q, DNS_TRANSACTION_ERRNO); | |
801ad6a6 | 825 | } |
934e9b10 | 826 | |
801ad6a6 | 827 | void dns_query_ready(DnsQuery *q) { |
74b2466e | 828 | |
801ad6a6 LP |
829 | DnsQueryCandidate *bad = NULL, *c; |
830 | bool pending = false; | |
74b2466e | 831 | |
801ad6a6 | 832 | assert(q); |
547973de | 833 | assert(DNS_TRANSACTION_IS_LIVE(q->state)); |
e4501ed4 | 834 | |
801ad6a6 LP |
835 | /* Note that this call might invalidate the query. Callers |
836 | * should hence not attempt to access the query or transaction | |
837 | * after calling this function, unless the block_ready | |
838 | * counter was explicitly bumped before doing so. */ | |
839 | ||
840 | if (q->block_ready > 0) | |
841 | return; | |
842 | ||
843 | LIST_FOREACH(candidates_by_query, c, q->candidates) { | |
844 | DnsTransactionState state; | |
845 | ||
846 | state = dns_query_candidate_state(c); | |
847 | switch (state) { | |
848 | ||
849 | case DNS_TRANSACTION_SUCCESS: | |
547973de | 850 | /* One of the candidates is successful, |
801ad6a6 LP |
851 | * let's use it, and copy its data out */ |
852 | dns_query_accept(q, c); | |
e4501ed4 LP |
853 | return; |
854 | ||
801ad6a6 | 855 | case DNS_TRANSACTION_NULL: |
547973de LP |
856 | case DNS_TRANSACTION_PENDING: |
857 | case DNS_TRANSACTION_VALIDATING: | |
858 | /* One of the candidates is still going on, | |
859 | * let's maybe wait for it */ | |
801ad6a6 LP |
860 | pending = true; |
861 | break; | |
e4501ed4 | 862 | |
801ad6a6 LP |
863 | default: |
864 | /* Any kind of failure */ | |
865 | bad = c; | |
866 | break; | |
867 | } | |
faa133f3 | 868 | } |
74b2466e | 869 | |
801ad6a6 LP |
870 | if (pending) |
871 | return; | |
2a1037af | 872 | |
801ad6a6 | 873 | dns_query_accept(q, bad); |
74b2466e | 874 | } |
8ba9fd9c | 875 | |
45ec7efb | 876 | static int dns_query_cname_redirect(DnsQuery *q, const DnsResourceRecord *cname) { |
23b298bc LP |
877 | _cleanup_(dns_question_unrefp) DnsQuestion *nq_idna = NULL, *nq_utf8 = NULL; |
878 | int r, k; | |
8ba9fd9c LP |
879 | |
880 | assert(q); | |
881 | ||
313cefa1 | 882 | q->n_cname_redirects++; |
faa133f3 | 883 | if (q->n_cname_redirects > CNAME_MAX) |
8ba9fd9c LP |
884 | return -ELOOP; |
885 | ||
23b298bc | 886 | r = dns_question_cname_redirect(q->question_idna, cname, &nq_idna); |
faa133f3 LP |
887 | if (r < 0) |
888 | return r; | |
23b298bc | 889 | else if (r > 0) |
8ec76e6a | 890 | log_debug("Following CNAME/DNAME %s → %s.", dns_question_first_name(q->question_idna), dns_question_first_name(nq_idna)); |
23b298bc LP |
891 | |
892 | k = dns_question_is_equal(q->question_idna, q->question_utf8); | |
893 | if (k < 0) | |
894 | return r; | |
895 | if (k > 0) { | |
896 | /* Same question? Shortcut new question generation */ | |
897 | nq_utf8 = dns_question_ref(nq_idna); | |
898 | k = r; | |
899 | } else { | |
900 | k = dns_question_cname_redirect(q->question_utf8, cname, &nq_utf8); | |
901 | if (k < 0) | |
902 | return k; | |
903 | else if (k > 0) | |
8ec76e6a | 904 | log_debug("Following UTF8 CNAME/DNAME %s → %s.", dns_question_first_name(q->question_utf8), dns_question_first_name(nq_utf8)); |
23b298bc | 905 | } |
8ba9fd9c | 906 | |
23b298bc LP |
907 | if (r == 0 && k == 0) /* No actual cname happened? */ |
908 | return -ELOOP; | |
909 | ||
8e5de09f LP |
910 | if (q->answer_protocol == DNS_PROTOCOL_DNS) { |
911 | /* Don't permit CNAME redirects from unicast DNS to LLMNR or MulticastDNS, so that global resources | |
912 | * cannot invade the local namespace. The opposite way we permit: local names may redirect to global | |
913 | * ones. */ | |
914 | ||
915 | q->flags &= ~(SD_RESOLVED_LLMNR|SD_RESOLVED_MDNS); /* mask away the local protocols */ | |
916 | } | |
917 | ||
918 | /* Turn off searching for the new name */ | |
919 | q->flags |= SD_RESOLVED_NO_SEARCH; | |
920 | ||
23b298bc | 921 | dns_question_unref(q->question_idna); |
1cc6c93a | 922 | q->question_idna = TAKE_PTR(nq_idna); |
bc7669cf | 923 | |
23b298bc | 924 | dns_question_unref(q->question_utf8); |
1cc6c93a | 925 | q->question_utf8 = TAKE_PTR(nq_utf8); |
8ba9fd9c | 926 | |
7820b320 LP |
927 | dns_query_free_candidates(q); |
928 | dns_query_reset_answer(q); | |
322345fd | 929 | |
8e5de09f | 930 | q->state = DNS_TRANSACTION_NULL; |
59a89990 | 931 | |
8ba9fd9c LP |
932 | return 0; |
933 | } | |
82bd6ddd | 934 | |
45ec7efb LP |
935 | int dns_query_process_cname(DnsQuery *q) { |
936 | _cleanup_(dns_resource_record_unrefp) DnsResourceRecord *cname = NULL; | |
23b298bc | 937 | DnsQuestion *question; |
45ec7efb LP |
938 | DnsResourceRecord *rr; |
939 | int r; | |
940 | ||
941 | assert(q); | |
942 | ||
7588460a TG |
943 | if (!IN_SET(q->state, DNS_TRANSACTION_SUCCESS, DNS_TRANSACTION_NULL)) |
944 | return DNS_QUERY_NOMATCH; | |
45ec7efb | 945 | |
23b298bc | 946 | question = dns_query_question_for_protocol(q, q->answer_protocol); |
45ec7efb | 947 | |
23b298bc LP |
948 | DNS_ANSWER_FOREACH(rr, q->answer) { |
949 | r = dns_question_matches_rr(question, rr, DNS_SEARCH_DOMAIN_NAME(q->answer_search_domain)); | |
45ec7efb LP |
950 | if (r < 0) |
951 | return r; | |
952 | if (r > 0) | |
7588460a | 953 | return DNS_QUERY_MATCH; /* The answer matches directly, no need to follow cnames */ |
45ec7efb | 954 | |
542e0c84 | 955 | r = dns_question_matches_cname_or_dname(question, rr, DNS_SEARCH_DOMAIN_NAME(q->answer_search_domain)); |
45ec7efb LP |
956 | if (r < 0) |
957 | return r; | |
958 | if (r > 0 && !cname) | |
959 | cname = dns_resource_record_ref(rr); | |
960 | } | |
961 | ||
962 | if (!cname) | |
7588460a | 963 | return DNS_QUERY_NOMATCH; /* No match and no cname to follow */ |
45ec7efb LP |
964 | |
965 | if (q->flags & SD_RESOLVED_NO_CNAME) | |
966 | return -ELOOP; | |
967 | ||
28830a64 LP |
968 | if (!q->answer_authenticated) |
969 | q->previous_redirect_unauthenticated = true; | |
970 | ||
45ec7efb LP |
971 | /* OK, let's actually follow the CNAME */ |
972 | r = dns_query_cname_redirect(q, cname); | |
973 | if (r < 0) | |
974 | return r; | |
975 | ||
976 | /* Let's see if the answer can already answer the new | |
977 | * redirected question */ | |
7588460a TG |
978 | r = dns_query_process_cname(q); |
979 | if (r != DNS_QUERY_NOMATCH) | |
980 | return r; | |
45ec7efb LP |
981 | |
982 | /* OK, it cannot, let's begin with the new query */ | |
983 | r = dns_query_go(q); | |
984 | if (r < 0) | |
985 | return r; | |
986 | ||
7588460a | 987 | return DNS_QUERY_RESTARTED; /* We restarted the query for a new cname */ |
45ec7efb LP |
988 | } |
989 | ||
82bd6ddd LP |
990 | static int on_bus_track(sd_bus_track *t, void *userdata) { |
991 | DnsQuery *q = userdata; | |
992 | ||
993 | assert(t); | |
994 | assert(q); | |
995 | ||
996 | log_debug("Client of active query vanished, aborting query."); | |
997 | dns_query_complete(q, DNS_TRANSACTION_ABORTED); | |
998 | return 0; | |
999 | } | |
1000 | ||
966c66e3 | 1001 | int dns_query_bus_track(DnsQuery *q, sd_bus_message *m) { |
82bd6ddd LP |
1002 | int r; |
1003 | ||
1004 | assert(q); | |
1005 | assert(m); | |
1006 | ||
1007 | if (!q->bus_track) { | |
966c66e3 | 1008 | r = sd_bus_track_new(sd_bus_message_get_bus(m), &q->bus_track, on_bus_track, q); |
82bd6ddd LP |
1009 | if (r < 0) |
1010 | return r; | |
1011 | } | |
1012 | ||
1013 | r = sd_bus_track_add_sender(q->bus_track, m); | |
1014 | if (r < 0) | |
1015 | return r; | |
1016 | ||
1017 | return 0; | |
1018 | } | |
23b298bc LP |
1019 | |
1020 | DnsQuestion* dns_query_question_for_protocol(DnsQuery *q, DnsProtocol protocol) { | |
1021 | assert(q); | |
1022 | ||
1023 | switch (protocol) { | |
1024 | ||
1025 | case DNS_PROTOCOL_DNS: | |
1026 | return q->question_idna; | |
1027 | ||
1028 | case DNS_PROTOCOL_MDNS: | |
1029 | case DNS_PROTOCOL_LLMNR: | |
1030 | return q->question_utf8; | |
1031 | ||
1032 | default: | |
1033 | return NULL; | |
1034 | } | |
1035 | } | |
1036 | ||
1037 | const char *dns_query_string(DnsQuery *q) { | |
1038 | const char *name; | |
1039 | int r; | |
1040 | ||
1041 | /* Returns a somewhat useful human-readable lookup key string for this query */ | |
1042 | ||
1043 | if (q->request_address_string) | |
1044 | return q->request_address_string; | |
1045 | ||
1046 | if (q->request_address_valid) { | |
1047 | r = in_addr_to_string(q->request_family, &q->request_address, &q->request_address_string); | |
1048 | if (r >= 0) | |
1049 | return q->request_address_string; | |
1050 | } | |
1051 | ||
1052 | name = dns_question_first_name(q->question_utf8); | |
1053 | if (name) | |
1054 | return name; | |
1055 | ||
1056 | return dns_question_first_name(q->question_idna); | |
1057 | } | |
28830a64 LP |
1058 | |
1059 | bool dns_query_fully_authenticated(DnsQuery *q) { | |
1060 | assert(q); | |
1061 | ||
1062 | return q->answer_authenticated && !q->previous_redirect_unauthenticated; | |
1063 | } |