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5eef597e MP |
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 | ||
f47781d8 | 22 | #include "bus-common-errors.h" |
5eef597e MP |
23 | #include "bus-util.h" |
24 | ||
25 | #include "resolved-dns-domain.h" | |
26 | #include "resolved-bus.h" | |
27 | #include "resolved-def.h" | |
28 | ||
29 | static int reply_query_state(DnsQuery *q) { | |
30 | _cleanup_free_ char *ip = NULL; | |
31 | const char *name; | |
32 | int r; | |
33 | ||
34 | if (q->request_hostname) | |
35 | name = q->request_hostname; | |
36 | else { | |
37 | r = in_addr_to_string(q->request_family, &q->request_address, &ip); | |
38 | if (r < 0) | |
39 | return r; | |
40 | ||
41 | name = ip; | |
42 | } | |
43 | ||
44 | switch (q->state) { | |
45 | ||
46 | case DNS_TRANSACTION_NO_SERVERS: | |
47 | return sd_bus_reply_method_errorf(q->request, BUS_ERROR_NO_NAME_SERVERS, "No appropriate name servers or networks for name found"); | |
48 | ||
49 | case DNS_TRANSACTION_TIMEOUT: | |
50 | return sd_bus_reply_method_errorf(q->request, SD_BUS_ERROR_TIMEOUT, "Query timed out"); | |
51 | ||
52 | case DNS_TRANSACTION_ATTEMPTS_MAX_REACHED: | |
53 | return sd_bus_reply_method_errorf(q->request, SD_BUS_ERROR_TIMEOUT, "All attempts to contact name servers or networks failed"); | |
54 | ||
55 | case DNS_TRANSACTION_INVALID_REPLY: | |
56 | return sd_bus_reply_method_errorf(q->request, BUS_ERROR_INVALID_REPLY, "Received invalid reply"); | |
57 | ||
58 | case DNS_TRANSACTION_RESOURCES: | |
59 | return sd_bus_reply_method_errorf(q->request, BUS_ERROR_NO_RESOURCES, "Not enough resources"); | |
60 | ||
61 | case DNS_TRANSACTION_ABORTED: | |
62 | return sd_bus_reply_method_errorf(q->request, BUS_ERROR_ABORTED, "Query aborted"); | |
63 | ||
64 | case DNS_TRANSACTION_FAILURE: { | |
65 | _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; | |
66 | ||
67 | if (q->answer_rcode == DNS_RCODE_NXDOMAIN) | |
68 | sd_bus_error_setf(&error, _BUS_ERROR_DNS "NXDOMAIN", "'%s' not found", name); | |
69 | else { | |
70 | const char *rc, *n; | |
71 | char p[3]; /* the rcode is 4 bits long */ | |
72 | ||
73 | rc = dns_rcode_to_string(q->answer_rcode); | |
74 | if (!rc) { | |
75 | sprintf(p, "%i", q->answer_rcode); | |
76 | rc = p; | |
77 | } | |
78 | ||
e735f4d4 | 79 | n = strjoina(_BUS_ERROR_DNS, rc); |
5eef597e MP |
80 | sd_bus_error_setf(&error, n, "Could not resolve '%s', server or network returned error %s", name, rc); |
81 | } | |
82 | ||
83 | return sd_bus_reply_method_error(q->request, &error); | |
84 | } | |
85 | ||
86 | case DNS_TRANSACTION_NULL: | |
87 | case DNS_TRANSACTION_PENDING: | |
88 | case DNS_TRANSACTION_SUCCESS: | |
89 | default: | |
90 | assert_not_reached("Impossible state"); | |
91 | } | |
92 | } | |
93 | ||
94 | static int append_address(sd_bus_message *reply, DnsResourceRecord *rr) { | |
95 | int r; | |
96 | ||
97 | assert(reply); | |
98 | assert(rr); | |
99 | ||
100 | r = sd_bus_message_open_container(reply, 'r', "iay"); | |
101 | if (r < 0) | |
102 | return r; | |
103 | ||
104 | if (rr->key->type == DNS_TYPE_A) { | |
105 | r = sd_bus_message_append(reply, "i", AF_INET); | |
106 | if (r < 0) | |
107 | return r; | |
108 | ||
109 | r = sd_bus_message_append_array(reply, 'y', &rr->a.in_addr, sizeof(struct in_addr)); | |
110 | ||
111 | } else if (rr->key->type == DNS_TYPE_AAAA) { | |
112 | r = sd_bus_message_append(reply, "i", AF_INET6); | |
113 | if (r < 0) | |
114 | return r; | |
115 | ||
116 | r = sd_bus_message_append_array(reply, 'y', &rr->aaaa.in6_addr, sizeof(struct in6_addr)); | |
117 | } else | |
118 | return -EAFNOSUPPORT; | |
119 | ||
120 | if (r < 0) | |
121 | return r; | |
122 | ||
123 | r = sd_bus_message_close_container(reply); | |
124 | if (r < 0) | |
125 | return r; | |
126 | ||
127 | return 0; | |
128 | } | |
129 | ||
130 | static void bus_method_resolve_hostname_complete(DnsQuery *q) { | |
131 | _cleanup_(dns_resource_record_unrefp) DnsResourceRecord *cname = NULL, *canonical = NULL; | |
132 | _cleanup_bus_message_unref_ sd_bus_message *reply = NULL; | |
133 | _cleanup_(dns_answer_unrefp) DnsAnswer *answer = NULL; | |
134 | unsigned added = 0, i; | |
135 | int r; | |
136 | ||
137 | assert(q); | |
138 | ||
139 | if (q->state != DNS_TRANSACTION_SUCCESS) { | |
140 | r = reply_query_state(q); | |
141 | goto finish; | |
142 | } | |
143 | ||
144 | r = sd_bus_message_new_method_return(q->request, &reply); | |
145 | if (r < 0) | |
146 | goto finish; | |
147 | ||
148 | r = sd_bus_message_append(reply, "i", q->answer_ifindex); | |
149 | if (r < 0) | |
150 | goto finish; | |
151 | ||
152 | r = sd_bus_message_open_container(reply, 'a', "(iay)"); | |
153 | if (r < 0) | |
154 | goto finish; | |
155 | ||
156 | if (q->answer) { | |
157 | answer = dns_answer_ref(q->answer); | |
158 | ||
159 | for (i = 0; i < answer->n_rrs; i++) { | |
160 | r = dns_question_matches_rr(q->question, answer->rrs[i]); | |
161 | if (r < 0) | |
162 | goto finish; | |
163 | if (r == 0) { | |
164 | /* Hmm, if this is not an address record, | |
165 | maybe it's a cname? If so, remember this */ | |
166 | r = dns_question_matches_cname(q->question, answer->rrs[i]); | |
167 | if (r < 0) | |
168 | goto finish; | |
169 | if (r > 0) | |
170 | cname = dns_resource_record_ref(answer->rrs[i]); | |
171 | ||
172 | continue; | |
173 | } | |
174 | ||
175 | r = append_address(reply, answer->rrs[i]); | |
176 | if (r < 0) | |
177 | goto finish; | |
178 | ||
179 | if (!canonical) | |
180 | canonical = dns_resource_record_ref(answer->rrs[i]); | |
181 | ||
182 | added ++; | |
183 | } | |
184 | } | |
185 | ||
e3bff60a | 186 | if (added == 0) { |
5eef597e MP |
187 | if (!cname) { |
188 | r = sd_bus_reply_method_errorf(q->request, BUS_ERROR_NO_SUCH_RR, "'%s' does not have any RR of requested type", q->request_hostname); | |
189 | goto finish; | |
190 | } | |
191 | ||
192 | /* This has a cname? Then update the query with the | |
193 | * new cname. */ | |
194 | r = dns_query_cname_redirect(q, cname->cname.name); | |
195 | if (r < 0) { | |
196 | if (r == -ELOOP) | |
197 | r = sd_bus_reply_method_errorf(q->request, BUS_ERROR_CNAME_LOOP, "CNAME loop on '%s'", q->request_hostname); | |
198 | else | |
199 | r = sd_bus_reply_method_errno(q->request, -r, NULL); | |
200 | ||
201 | goto finish; | |
202 | } | |
203 | ||
204 | /* Before we restart the query, let's see if any of | |
205 | * the RRs we already got already answers our query */ | |
206 | for (i = 0; i < answer->n_rrs; i++) { | |
207 | r = dns_question_matches_rr(q->question, answer->rrs[i]); | |
208 | if (r < 0) | |
209 | goto finish; | |
210 | if (r == 0) | |
211 | continue; | |
212 | ||
213 | r = append_address(reply, answer->rrs[i]); | |
214 | if (r < 0) | |
215 | goto finish; | |
216 | ||
217 | if (!canonical) | |
218 | canonical = dns_resource_record_ref(answer->rrs[i]); | |
219 | ||
220 | added++; | |
221 | } | |
222 | ||
e3bff60a MP |
223 | // what about the cache? |
224 | ||
5eef597e MP |
225 | /* If we didn't find anything, then let's restart the |
226 | * query, this time with the cname */ | |
227 | if (added <= 0) { | |
228 | r = dns_query_go(q); | |
229 | if (r == -ESRCH) { | |
230 | r = sd_bus_reply_method_errorf(q->request, BUS_ERROR_NO_NAME_SERVERS, "No appropriate name servers or networks for name found"); | |
231 | goto finish; | |
232 | } | |
233 | if (r < 0) { | |
234 | r = sd_bus_reply_method_errno(q->request, -r, NULL); | |
235 | goto finish; | |
236 | } | |
237 | ||
238 | return; | |
239 | } | |
240 | } | |
241 | ||
242 | r = sd_bus_message_close_container(reply); | |
243 | if (r < 0) | |
244 | goto finish; | |
245 | ||
246 | /* Return the precise spelling and uppercasing reported by the server */ | |
247 | assert(canonical); | |
248 | r = sd_bus_message_append(reply, "st", DNS_RESOURCE_KEY_NAME(canonical->key), SD_RESOLVED_FLAGS_MAKE(q->answer_protocol, q->answer_family)); | |
249 | if (r < 0) | |
250 | goto finish; | |
251 | ||
252 | r = sd_bus_send(q->manager->bus, reply, NULL); | |
253 | ||
254 | finish: | |
255 | if (r < 0) { | |
f47781d8 | 256 | log_error_errno(r, "Failed to send hostname reply: %m"); |
5eef597e MP |
257 | sd_bus_reply_method_errno(q->request, -r, NULL); |
258 | } | |
259 | ||
260 | dns_query_free(q); | |
261 | } | |
262 | ||
263 | static int check_ifindex_flags(int ifindex, uint64_t *flags, sd_bus_error *error) { | |
264 | assert(flags); | |
265 | ||
266 | if (ifindex < 0) | |
267 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid interface index"); | |
268 | ||
269 | if (*flags & ~SD_RESOLVED_FLAGS_ALL) | |
270 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid flags parameter"); | |
271 | ||
272 | if (*flags == 0) | |
273 | *flags = SD_RESOLVED_FLAGS_DEFAULT; | |
274 | ||
275 | return 0; | |
276 | } | |
277 | ||
e3bff60a | 278 | static int bus_method_resolve_hostname(sd_bus_message *message, void *userdata, sd_bus_error *error) { |
5eef597e MP |
279 | _cleanup_(dns_question_unrefp) DnsQuestion *question = NULL; |
280 | Manager *m = userdata; | |
281 | const char *hostname; | |
282 | int family, ifindex; | |
283 | uint64_t flags; | |
284 | DnsQuery *q; | |
285 | int r; | |
286 | ||
5eef597e MP |
287 | assert(message); |
288 | assert(m); | |
289 | ||
290 | r = sd_bus_message_read(message, "isit", &ifindex, &hostname, &family, &flags); | |
291 | if (r < 0) | |
292 | return r; | |
293 | ||
294 | if (!IN_SET(family, AF_INET, AF_INET6, AF_UNSPEC)) | |
295 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Unknown address family %i", family); | |
296 | ||
297 | r = dns_name_normalize(hostname, NULL); | |
298 | if (r < 0) | |
299 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid hostname '%s'", hostname); | |
300 | ||
301 | r = check_ifindex_flags(ifindex, &flags, error); | |
302 | if (r < 0) | |
303 | return r; | |
304 | ||
305 | question = dns_question_new(family == AF_UNSPEC ? 2 : 1); | |
306 | if (!question) | |
307 | return -ENOMEM; | |
308 | ||
309 | if (family != AF_INET6) { | |
310 | _cleanup_(dns_resource_key_unrefp) DnsResourceKey *key = NULL; | |
311 | ||
312 | key = dns_resource_key_new(DNS_CLASS_IN, DNS_TYPE_A, hostname); | |
313 | if (!key) | |
314 | return -ENOMEM; | |
315 | ||
316 | r = dns_question_add(question, key); | |
317 | if (r < 0) | |
318 | return r; | |
319 | } | |
320 | ||
321 | if (family != AF_INET) { | |
322 | _cleanup_(dns_resource_key_unrefp) DnsResourceKey *key = NULL; | |
323 | ||
324 | key = dns_resource_key_new(DNS_CLASS_IN, DNS_TYPE_AAAA, hostname); | |
325 | if (!key) | |
326 | return -ENOMEM; | |
327 | ||
328 | r = dns_question_add(question, key); | |
329 | if (r < 0) | |
330 | return r; | |
331 | } | |
332 | ||
333 | r = dns_query_new(m, &q, question, ifindex, flags); | |
334 | if (r < 0) | |
335 | return r; | |
336 | ||
337 | q->request = sd_bus_message_ref(message); | |
338 | q->request_family = family; | |
339 | q->request_hostname = hostname; | |
340 | q->complete = bus_method_resolve_hostname_complete; | |
341 | ||
e3bff60a | 342 | r = dns_query_bus_track(q, message); |
5eef597e MP |
343 | if (r < 0) |
344 | return r; | |
345 | ||
346 | r = dns_query_go(q); | |
347 | if (r < 0) { | |
348 | dns_query_free(q); | |
349 | ||
350 | if (r == -ESRCH) | |
351 | sd_bus_error_setf(error, BUS_ERROR_NO_NAME_SERVERS, "No appropriate name servers or networks for name found"); | |
352 | ||
353 | return r; | |
354 | } | |
355 | ||
356 | return 1; | |
357 | } | |
358 | ||
359 | static void bus_method_resolve_address_complete(DnsQuery *q) { | |
360 | _cleanup_bus_message_unref_ sd_bus_message *reply = NULL; | |
361 | _cleanup_(dns_answer_unrefp) DnsAnswer *answer = NULL; | |
362 | unsigned added = 0, i; | |
363 | int r; | |
364 | ||
365 | assert(q); | |
366 | ||
367 | if (q->state != DNS_TRANSACTION_SUCCESS) { | |
368 | r = reply_query_state(q); | |
369 | goto finish; | |
370 | } | |
371 | ||
372 | r = sd_bus_message_new_method_return(q->request, &reply); | |
373 | if (r < 0) | |
374 | goto finish; | |
375 | ||
376 | r = sd_bus_message_append(reply, "i", q->answer_ifindex); | |
377 | if (r < 0) | |
378 | goto finish; | |
379 | ||
380 | r = sd_bus_message_open_container(reply, 'a', "s"); | |
381 | if (r < 0) | |
382 | goto finish; | |
383 | ||
384 | if (q->answer) { | |
385 | answer = dns_answer_ref(q->answer); | |
386 | ||
387 | for (i = 0; i < answer->n_rrs; i++) { | |
388 | r = dns_question_matches_rr(q->question, answer->rrs[i]); | |
389 | if (r < 0) | |
390 | goto finish; | |
391 | if (r == 0) | |
392 | continue; | |
393 | ||
394 | r = sd_bus_message_append(reply, "s", answer->rrs[i]->ptr.name); | |
395 | if (r < 0) | |
396 | goto finish; | |
397 | ||
398 | added ++; | |
399 | } | |
400 | } | |
401 | ||
e3bff60a | 402 | if (added == 0) { |
5eef597e MP |
403 | _cleanup_free_ char *ip = NULL; |
404 | ||
405 | in_addr_to_string(q->request_family, &q->request_address, &ip); | |
406 | ||
407 | r = sd_bus_reply_method_errorf(q->request, BUS_ERROR_NO_SUCH_RR, "Address '%s' does not have any RR of requested type", ip); | |
408 | goto finish; | |
409 | } | |
410 | ||
411 | r = sd_bus_message_close_container(reply); | |
412 | if (r < 0) | |
413 | goto finish; | |
414 | ||
415 | r = sd_bus_message_append(reply, "t", SD_RESOLVED_FLAGS_MAKE(q->answer_protocol, q->answer_family)); | |
416 | if (r < 0) | |
417 | goto finish; | |
418 | ||
419 | r = sd_bus_send(q->manager->bus, reply, NULL); | |
420 | ||
421 | finish: | |
422 | if (r < 0) { | |
f47781d8 | 423 | log_error_errno(r, "Failed to send address reply: %m"); |
5eef597e MP |
424 | sd_bus_reply_method_errno(q->request, -r, NULL); |
425 | } | |
426 | ||
427 | dns_query_free(q); | |
428 | } | |
429 | ||
e3bff60a | 430 | static int bus_method_resolve_address(sd_bus_message *message, void *userdata, sd_bus_error *error) { |
5eef597e MP |
431 | _cleanup_(dns_resource_key_unrefp) DnsResourceKey *key = NULL; |
432 | _cleanup_(dns_question_unrefp) DnsQuestion *question = NULL; | |
433 | _cleanup_free_ char *reverse = NULL; | |
434 | Manager *m = userdata; | |
435 | int family, ifindex; | |
436 | uint64_t flags; | |
437 | const void *d; | |
438 | DnsQuery *q; | |
439 | size_t sz; | |
440 | int r; | |
441 | ||
5eef597e MP |
442 | assert(message); |
443 | assert(m); | |
444 | ||
445 | r = sd_bus_message_read(message, "ii", &ifindex, &family); | |
446 | if (r < 0) | |
447 | return r; | |
448 | ||
449 | if (!IN_SET(family, AF_INET, AF_INET6)) | |
450 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Unknown address family %i", family); | |
451 | ||
452 | r = sd_bus_message_read_array(message, 'y', &d, &sz); | |
453 | if (r < 0) | |
454 | return r; | |
455 | ||
456 | if (sz != FAMILY_ADDRESS_SIZE(family)) | |
457 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid address size"); | |
458 | ||
459 | r = sd_bus_message_read(message, "t", &flags); | |
460 | if (r < 0) | |
461 | return r; | |
462 | ||
463 | r = check_ifindex_flags(ifindex, &flags, error); | |
464 | if (r < 0) | |
465 | return r; | |
466 | ||
467 | r = dns_name_reverse(family, d, &reverse); | |
468 | if (r < 0) | |
469 | return r; | |
470 | ||
471 | question = dns_question_new(1); | |
472 | if (!question) | |
473 | return -ENOMEM; | |
474 | ||
475 | key = dns_resource_key_new_consume(DNS_CLASS_IN, DNS_TYPE_PTR, reverse); | |
476 | if (!key) | |
477 | return -ENOMEM; | |
478 | ||
479 | reverse = NULL; | |
480 | ||
481 | r = dns_question_add(question, key); | |
482 | if (r < 0) | |
483 | return r; | |
484 | ||
485 | r = dns_query_new(m, &q, question, ifindex, flags); | |
486 | if (r < 0) | |
487 | return r; | |
488 | ||
489 | q->request = sd_bus_message_ref(message); | |
490 | q->request_family = family; | |
491 | memcpy(&q->request_address, d, sz); | |
492 | q->complete = bus_method_resolve_address_complete; | |
493 | ||
e3bff60a | 494 | r = dns_query_bus_track(q, message); |
5eef597e MP |
495 | if (r < 0) |
496 | return r; | |
497 | ||
498 | r = dns_query_go(q); | |
499 | if (r < 0) { | |
500 | dns_query_free(q); | |
501 | ||
502 | if (r == -ESRCH) | |
503 | sd_bus_error_setf(error, BUS_ERROR_NO_NAME_SERVERS, "No appropriate name servers or networks for name found"); | |
504 | ||
505 | return r; | |
506 | } | |
507 | ||
508 | return 1; | |
509 | } | |
510 | ||
511 | static void bus_method_resolve_record_complete(DnsQuery *q) { | |
512 | _cleanup_bus_message_unref_ sd_bus_message *reply = NULL; | |
513 | _cleanup_(dns_answer_unrefp) DnsAnswer *answer = NULL; | |
514 | unsigned added = 0, i; | |
515 | int r; | |
516 | ||
517 | assert(q); | |
518 | ||
519 | if (q->state != DNS_TRANSACTION_SUCCESS) { | |
520 | r = reply_query_state(q); | |
521 | goto finish; | |
522 | } | |
523 | ||
524 | r = sd_bus_message_new_method_return(q->request, &reply); | |
525 | if (r < 0) | |
526 | goto finish; | |
527 | ||
528 | r = sd_bus_message_append(reply, "i", q->answer_ifindex); | |
529 | if (r < 0) | |
530 | goto finish; | |
531 | ||
532 | r = sd_bus_message_open_container(reply, 'a', "(qqay)"); | |
533 | if (r < 0) | |
534 | goto finish; | |
535 | ||
536 | if (q->answer) { | |
537 | answer = dns_answer_ref(q->answer); | |
538 | ||
539 | for (i = 0; i < answer->n_rrs; i++) { | |
540 | _cleanup_(dns_packet_unrefp) DnsPacket *p = NULL; | |
541 | size_t start; | |
542 | ||
543 | r = dns_question_matches_rr(q->question, answer->rrs[i]); | |
544 | if (r < 0) | |
545 | goto finish; | |
546 | if (r == 0) | |
547 | continue; | |
548 | ||
549 | r = dns_packet_new(&p, DNS_PROTOCOL_DNS, 0); | |
550 | if (r < 0) | |
551 | goto finish; | |
552 | ||
553 | r = dns_packet_append_rr(p, answer->rrs[i], &start); | |
554 | if (r < 0) | |
555 | goto finish; | |
556 | ||
557 | r = sd_bus_message_open_container(reply, 'r', "qqay"); | |
558 | if (r < 0) | |
559 | goto finish; | |
560 | ||
561 | r = sd_bus_message_append(reply, "qq", answer->rrs[i]->key->class, answer->rrs[i]->key->type); | |
562 | if (r < 0) | |
563 | goto finish; | |
564 | ||
565 | r = sd_bus_message_append_array(reply, 'y', DNS_PACKET_DATA(p) + start, p->size - start); | |
566 | if (r < 0) | |
567 | goto finish; | |
568 | ||
569 | r = sd_bus_message_close_container(reply); | |
570 | if (r < 0) | |
571 | goto finish; | |
572 | ||
573 | added ++; | |
574 | } | |
575 | } | |
576 | ||
577 | if (added <= 0) { | |
578 | r = sd_bus_reply_method_errorf(q->request, BUS_ERROR_NO_SUCH_RR, "Name '%s' does not have any RR of the requested type", q->request_hostname); | |
579 | goto finish; | |
580 | } | |
581 | ||
582 | r = sd_bus_message_close_container(reply); | |
583 | if (r < 0) | |
584 | goto finish; | |
585 | ||
586 | r = sd_bus_message_append(reply, "t", SD_RESOLVED_FLAGS_MAKE(q->answer_protocol, q->answer_family)); | |
587 | if (r < 0) | |
588 | goto finish; | |
589 | ||
590 | r = sd_bus_send(q->manager->bus, reply, NULL); | |
591 | ||
592 | finish: | |
593 | if (r < 0) { | |
f47781d8 | 594 | log_error_errno(r, "Failed to send record reply: %m"); |
5eef597e MP |
595 | sd_bus_reply_method_errno(q->request, -r, NULL); |
596 | } | |
597 | ||
598 | dns_query_free(q); | |
599 | } | |
600 | ||
e3bff60a | 601 | static int bus_method_resolve_record(sd_bus_message *message, void *userdata, sd_bus_error *error) { |
5eef597e MP |
602 | _cleanup_(dns_resource_key_unrefp) DnsResourceKey *key = NULL; |
603 | _cleanup_(dns_question_unrefp) DnsQuestion *question = NULL; | |
604 | Manager *m = userdata; | |
605 | uint16_t class, type; | |
606 | const char *name; | |
607 | int r, ifindex; | |
608 | uint64_t flags; | |
609 | DnsQuery *q; | |
610 | ||
5eef597e MP |
611 | assert(message); |
612 | assert(m); | |
613 | ||
614 | r = sd_bus_message_read(message, "isqqt", &ifindex, &name, &class, &type, &flags); | |
615 | if (r < 0) | |
616 | return r; | |
617 | ||
618 | r = dns_name_normalize(name, NULL); | |
619 | if (r < 0) | |
620 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid name '%s'", name); | |
621 | ||
622 | r = check_ifindex_flags(ifindex, &flags, error); | |
623 | if (r < 0) | |
624 | return r; | |
625 | ||
626 | question = dns_question_new(1); | |
627 | if (!question) | |
628 | return -ENOMEM; | |
629 | ||
630 | key = dns_resource_key_new(class, type, name); | |
631 | if (!key) | |
632 | return -ENOMEM; | |
633 | ||
634 | r = dns_question_add(question, key); | |
635 | if (r < 0) | |
636 | return r; | |
637 | ||
638 | r = dns_query_new(m, &q, question, ifindex, flags); | |
639 | if (r < 0) | |
640 | return r; | |
641 | ||
642 | q->request = sd_bus_message_ref(message); | |
643 | q->request_hostname = name; | |
644 | q->complete = bus_method_resolve_record_complete; | |
645 | ||
e3bff60a | 646 | r = dns_query_bus_track(q, message); |
5eef597e MP |
647 | if (r < 0) |
648 | return r; | |
649 | ||
650 | r = dns_query_go(q); | |
651 | if (r < 0) { | |
652 | dns_query_free(q); | |
653 | ||
654 | if (r == -ESRCH) | |
655 | sd_bus_error_setf(error, BUS_ERROR_NO_NAME_SERVERS, "No appropriate name servers or networks for name found"); | |
656 | ||
657 | return r; | |
658 | } | |
659 | ||
660 | return 1; | |
661 | } | |
662 | ||
663 | static const sd_bus_vtable resolve_vtable[] = { | |
664 | SD_BUS_VTABLE_START(0), | |
665 | SD_BUS_METHOD("ResolveHostname", "isit", "ia(iay)st", bus_method_resolve_hostname, SD_BUS_VTABLE_UNPRIVILEGED), | |
666 | SD_BUS_METHOD("ResolveAddress", "iiayt", "iast", bus_method_resolve_address, SD_BUS_VTABLE_UNPRIVILEGED), | |
667 | SD_BUS_METHOD("ResolveRecord", "isqqt", "ia(qqay)t", bus_method_resolve_record, SD_BUS_VTABLE_UNPRIVILEGED), | |
668 | SD_BUS_VTABLE_END, | |
669 | }; | |
670 | ||
671 | static int on_bus_retry(sd_event_source *s, usec_t usec, void *userdata) { | |
672 | Manager *m = userdata; | |
673 | ||
674 | assert(s); | |
675 | assert(m); | |
676 | ||
677 | m->bus_retry_event_source = sd_event_source_unref(m->bus_retry_event_source); | |
678 | ||
679 | manager_connect_bus(m); | |
680 | return 0; | |
681 | } | |
682 | ||
e3bff60a | 683 | static int match_prepare_for_sleep(sd_bus_message *message, void *userdata, sd_bus_error *ret_error) { |
5eef597e MP |
684 | Manager *m = userdata; |
685 | int b, r; | |
686 | ||
e3bff60a MP |
687 | assert(message); |
688 | assert(m); | |
5eef597e MP |
689 | |
690 | r = sd_bus_message_read(message, "b", &b); | |
691 | if (r < 0) { | |
f47781d8 | 692 | log_debug_errno(r, "Failed to parse PrepareForSleep signal: %m"); |
5eef597e MP |
693 | return 0; |
694 | } | |
695 | ||
696 | if (b) | |
697 | return 0; | |
698 | ||
699 | log_debug("Coming back from suspend, verifying all RRs..."); | |
700 | ||
701 | manager_verify_all(m); | |
702 | return 0; | |
703 | } | |
704 | ||
705 | int manager_connect_bus(Manager *m) { | |
706 | int r; | |
707 | ||
708 | assert(m); | |
709 | ||
710 | if (m->bus) | |
711 | return 0; | |
712 | ||
713 | r = sd_bus_default_system(&m->bus); | |
714 | if (r < 0) { | |
715 | /* We failed to connect? Yuck, we must be in early | |
716 | * boot. Let's try in 5s again. As soon as we have | |
717 | * kdbus we can stop doing this... */ | |
718 | ||
f47781d8 | 719 | log_debug_errno(r, "Failed to connect to bus, trying again in 5s: %m"); |
5eef597e MP |
720 | |
721 | r = sd_event_add_time(m->event, &m->bus_retry_event_source, CLOCK_MONOTONIC, now(CLOCK_MONOTONIC) + 5*USEC_PER_SEC, 0, on_bus_retry, m); | |
f47781d8 MP |
722 | if (r < 0) |
723 | return log_error_errno(r, "Failed to install bus reconnect time event: %m"); | |
5eef597e MP |
724 | |
725 | return 0; | |
726 | } | |
727 | ||
728 | r = sd_bus_add_object_vtable(m->bus, NULL, "/org/freedesktop/resolve1", "org.freedesktop.resolve1.Manager", resolve_vtable, m); | |
f47781d8 MP |
729 | if (r < 0) |
730 | return log_error_errno(r, "Failed to register object: %m"); | |
5eef597e MP |
731 | |
732 | r = sd_bus_request_name(m->bus, "org.freedesktop.resolve1", 0); | |
f47781d8 MP |
733 | if (r < 0) |
734 | return log_error_errno(r, "Failed to register name: %m"); | |
5eef597e MP |
735 | |
736 | r = sd_bus_attach_event(m->bus, m->event, 0); | |
f47781d8 MP |
737 | if (r < 0) |
738 | return log_error_errno(r, "Failed to attach bus to event loop: %m"); | |
5eef597e MP |
739 | |
740 | r = sd_bus_add_match(m->bus, &m->prepare_for_sleep_slot, | |
741 | "type='signal'," | |
742 | "sender='org.freedesktop.login1'," | |
743 | "interface='org.freedesktop.login1.Manager'," | |
744 | "member='PrepareForSleep'," | |
745 | "path='/org/freedesktop/login1'", | |
746 | match_prepare_for_sleep, | |
747 | m); | |
748 | if (r < 0) | |
f47781d8 | 749 | log_error_errno(r, "Failed to add match for PrepareForSleep: %m"); |
5eef597e MP |
750 | |
751 | return 0; | |
752 | } |