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091a364c TG |
1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2014 Tom Gundersen <teg@jklm.no> | |
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 | ||
07630cea LP |
22 | #include <netinet/in.h> |
23 | #include <poll.h> | |
74b2466e | 24 | #include <sys/ioctl.h> |
091a364c | 25 | |
a2a416f7 | 26 | #include "af-list.h" |
b5efdb8a | 27 | #include "alloc-util.h" |
07630cea | 28 | #include "dns-domain.h" |
3ffd4af2 | 29 | #include "fd-util.h" |
a5a807e6 | 30 | #include "fileio-label.h" |
07630cea | 31 | #include "hostname-util.h" |
c004493c | 32 | #include "io-util.h" |
07630cea LP |
33 | #include "netlink-util.h" |
34 | #include "network-internal.h" | |
822db23c | 35 | #include "ordered-set.h" |
6bedfcbb | 36 | #include "parse-util.h" |
3df3e884 | 37 | #include "random-util.h" |
39d8db04 | 38 | #include "resolved-bus.h" |
07630cea | 39 | #include "resolved-conf.h" |
5f402ae8 | 40 | #include "resolved-llmnr.h" |
07630cea | 41 | #include "resolved-manager.h" |
f8dc7e34 | 42 | #include "resolved-resolv-conf.h" |
bc7702b0 | 43 | #include "resolved-mdns.h" |
07630cea | 44 | #include "socket-util.h" |
8b43440b | 45 | #include "string-table.h" |
07630cea LP |
46 | #include "string-util.h" |
47 | #include "utf8.h" | |
74b2466e LP |
48 | |
49 | #define SEND_TIMEOUT_USEC (200 * USEC_PER_MSEC) | |
50 | ||
1c4baffc | 51 | static int manager_process_link(sd_netlink *rtnl, sd_netlink_message *mm, void *userdata) { |
74b2466e LP |
52 | Manager *m = userdata; |
53 | uint16_t type; | |
54 | Link *l; | |
55 | int ifindex, r; | |
56 | ||
57 | assert(rtnl); | |
58 | assert(m); | |
59 | assert(mm); | |
60 | ||
1c4baffc | 61 | r = sd_netlink_message_get_type(mm, &type); |
74b2466e LP |
62 | if (r < 0) |
63 | goto fail; | |
64 | ||
65 | r = sd_rtnl_message_link_get_ifindex(mm, &ifindex); | |
66 | if (r < 0) | |
67 | goto fail; | |
68 | ||
69 | l = hashmap_get(m->links, INT_TO_PTR(ifindex)); | |
70 | ||
71 | switch (type) { | |
72 | ||
a2a416f7 LP |
73 | case RTM_NEWLINK:{ |
74 | bool is_new = !l; | |
74b2466e | 75 | |
a2a416f7 | 76 | if (!l) { |
74b2466e LP |
77 | r = link_new(m, &l, ifindex); |
78 | if (r < 0) | |
79 | goto fail; | |
80 | } | |
81 | ||
82 | r = link_update_rtnl(l, mm); | |
83 | if (r < 0) | |
84 | goto fail; | |
85 | ||
21d73c87 LP |
86 | r = link_update_monitor(l); |
87 | if (r < 0) | |
88 | goto fail; | |
89 | ||
a2a416f7 LP |
90 | if (is_new) |
91 | log_debug("Found new link %i/%s", ifindex, l->name); | |
92 | ||
74b2466e | 93 | break; |
a2a416f7 | 94 | } |
74b2466e LP |
95 | |
96 | case RTM_DELLINK: | |
97 | if (l) { | |
a2a416f7 | 98 | log_debug("Removing link %i/%s", l->ifindex, l->name); |
74b2466e LP |
99 | link_free(l); |
100 | } | |
101 | ||
102 | break; | |
103 | } | |
104 | ||
105 | return 0; | |
106 | ||
107 | fail: | |
da927ba9 | 108 | log_warning_errno(r, "Failed to process RTNL link message: %m"); |
74b2466e LP |
109 | return 0; |
110 | } | |
111 | ||
1c4baffc | 112 | static int manager_process_address(sd_netlink *rtnl, sd_netlink_message *mm, void *userdata) { |
74b2466e LP |
113 | Manager *m = userdata; |
114 | union in_addr_union address; | |
74b2466e | 115 | uint16_t type; |
0dd25fb9 | 116 | int r, ifindex, family; |
74b2466e LP |
117 | LinkAddress *a; |
118 | Link *l; | |
119 | ||
120 | assert(rtnl); | |
121 | assert(mm); | |
122 | assert(m); | |
123 | ||
1c4baffc | 124 | r = sd_netlink_message_get_type(mm, &type); |
74b2466e LP |
125 | if (r < 0) |
126 | goto fail; | |
127 | ||
128 | r = sd_rtnl_message_addr_get_ifindex(mm, &ifindex); | |
129 | if (r < 0) | |
130 | goto fail; | |
131 | ||
132 | l = hashmap_get(m->links, INT_TO_PTR(ifindex)); | |
133 | if (!l) | |
134 | return 0; | |
135 | ||
136 | r = sd_rtnl_message_addr_get_family(mm, &family); | |
137 | if (r < 0) | |
138 | goto fail; | |
139 | ||
140 | switch (family) { | |
141 | ||
142 | case AF_INET: | |
1c4baffc | 143 | r = sd_netlink_message_read_in_addr(mm, IFA_LOCAL, &address.in); |
74b2466e | 144 | if (r < 0) { |
1c4baffc | 145 | r = sd_netlink_message_read_in_addr(mm, IFA_ADDRESS, &address.in); |
74b2466e LP |
146 | if (r < 0) |
147 | goto fail; | |
148 | } | |
149 | ||
150 | break; | |
151 | ||
152 | case AF_INET6: | |
1c4baffc | 153 | r = sd_netlink_message_read_in6_addr(mm, IFA_LOCAL, &address.in6); |
74b2466e | 154 | if (r < 0) { |
1c4baffc | 155 | r = sd_netlink_message_read_in6_addr(mm, IFA_ADDRESS, &address.in6); |
74b2466e LP |
156 | if (r < 0) |
157 | goto fail; | |
158 | } | |
159 | ||
160 | break; | |
161 | ||
162 | default: | |
163 | return 0; | |
164 | } | |
165 | ||
166 | a = link_find_address(l, family, &address); | |
167 | ||
168 | switch (type) { | |
169 | ||
170 | case RTM_NEWADDR: | |
171 | ||
172 | if (!a) { | |
173 | r = link_address_new(l, &a, family, &address); | |
174 | if (r < 0) | |
175 | return r; | |
176 | } | |
177 | ||
178 | r = link_address_update_rtnl(a, mm); | |
179 | if (r < 0) | |
180 | return r; | |
181 | ||
182 | break; | |
183 | ||
184 | case RTM_DELADDR: | |
3e044c49 | 185 | link_address_free(a); |
74b2466e LP |
186 | break; |
187 | } | |
188 | ||
189 | return 0; | |
190 | ||
191 | fail: | |
da927ba9 | 192 | log_warning_errno(r, "Failed to process RTNL address message: %m"); |
74b2466e LP |
193 | return 0; |
194 | } | |
195 | ||
74b2466e | 196 | static int manager_rtnl_listen(Manager *m) { |
4afd3348 | 197 | _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL; |
1c4baffc | 198 | sd_netlink_message *i; |
74b2466e LP |
199 | int r; |
200 | ||
201 | assert(m); | |
202 | ||
cc98b302 | 203 | /* First, subscribe to interfaces coming and going */ |
1c4baffc | 204 | r = sd_netlink_open(&m->rtnl); |
74b2466e LP |
205 | if (r < 0) |
206 | return r; | |
207 | ||
1c4baffc | 208 | r = sd_netlink_attach_event(m->rtnl, m->event, 0); |
74b2466e LP |
209 | if (r < 0) |
210 | return r; | |
211 | ||
1c4baffc | 212 | r = sd_netlink_add_match(m->rtnl, RTM_NEWLINK, manager_process_link, m); |
74b2466e LP |
213 | if (r < 0) |
214 | return r; | |
215 | ||
1c4baffc | 216 | r = sd_netlink_add_match(m->rtnl, RTM_DELLINK, manager_process_link, m); |
74b2466e LP |
217 | if (r < 0) |
218 | return r; | |
219 | ||
1c4baffc | 220 | r = sd_netlink_add_match(m->rtnl, RTM_NEWADDR, manager_process_address, m); |
74b2466e LP |
221 | if (r < 0) |
222 | return r; | |
091a364c | 223 | |
1c4baffc | 224 | r = sd_netlink_add_match(m->rtnl, RTM_DELADDR, manager_process_address, m); |
74b2466e LP |
225 | if (r < 0) |
226 | return r; | |
227 | ||
228 | /* Then, enumerate all links */ | |
229 | r = sd_rtnl_message_new_link(m->rtnl, &req, RTM_GETLINK, 0); | |
230 | if (r < 0) | |
231 | return r; | |
232 | ||
1c4baffc | 233 | r = sd_netlink_message_request_dump(req, true); |
74b2466e LP |
234 | if (r < 0) |
235 | return r; | |
236 | ||
1c4baffc | 237 | r = sd_netlink_call(m->rtnl, req, 0, &reply); |
74b2466e LP |
238 | if (r < 0) |
239 | return r; | |
240 | ||
1c4baffc | 241 | for (i = reply; i; i = sd_netlink_message_next(i)) { |
74b2466e LP |
242 | r = manager_process_link(m->rtnl, i, m); |
243 | if (r < 0) | |
244 | return r; | |
245 | } | |
246 | ||
1c4baffc TG |
247 | req = sd_netlink_message_unref(req); |
248 | reply = sd_netlink_message_unref(reply); | |
74b2466e LP |
249 | |
250 | /* Finally, enumerate all addresses, too */ | |
251 | r = sd_rtnl_message_new_addr(m->rtnl, &req, RTM_GETADDR, 0, AF_UNSPEC); | |
252 | if (r < 0) | |
253 | return r; | |
254 | ||
1c4baffc | 255 | r = sd_netlink_message_request_dump(req, true); |
74b2466e LP |
256 | if (r < 0) |
257 | return r; | |
258 | ||
1c4baffc | 259 | r = sd_netlink_call(m->rtnl, req, 0, &reply); |
74b2466e LP |
260 | if (r < 0) |
261 | return r; | |
262 | ||
1c4baffc | 263 | for (i = reply; i; i = sd_netlink_message_next(i)) { |
74b2466e LP |
264 | r = manager_process_address(m->rtnl, i, m); |
265 | if (r < 0) | |
266 | return r; | |
267 | } | |
268 | ||
269 | return r; | |
270 | } | |
271 | ||
272 | static int on_network_event(sd_event_source *s, int fd, uint32_t revents, void *userdata) { | |
273 | Manager *m = userdata; | |
274 | Iterator i; | |
275 | Link *l; | |
276 | int r; | |
277 | ||
278 | assert(m); | |
279 | ||
280 | sd_network_monitor_flush(m->network_monitor); | |
281 | ||
282 | HASHMAP_FOREACH(l, m->links, i) { | |
283 | r = link_update_monitor(l); | |
284 | if (r < 0) | |
da927ba9 | 285 | log_warning_errno(r, "Failed to update monitor information for %i: %m", l->ifindex); |
74b2466e LP |
286 | } |
287 | ||
288 | r = manager_write_resolv_conf(m); | |
289 | if (r < 0) | |
da927ba9 | 290 | log_warning_errno(r, "Could not update resolv.conf: %m"); |
74b2466e LP |
291 | |
292 | return 0; | |
293 | } | |
294 | ||
295 | static int manager_network_monitor_listen(Manager *m) { | |
296 | int r, fd, events; | |
297 | ||
298 | assert(m); | |
299 | ||
0014a4ad | 300 | r = sd_network_monitor_new(&m->network_monitor, NULL); |
74b2466e LP |
301 | if (r < 0) |
302 | return r; | |
303 | ||
304 | fd = sd_network_monitor_get_fd(m->network_monitor); | |
305 | if (fd < 0) | |
306 | return fd; | |
307 | ||
308 | events = sd_network_monitor_get_events(m->network_monitor); | |
309 | if (events < 0) | |
310 | return events; | |
311 | ||
312 | r = sd_event_add_io(m->event, &m->network_event_source, fd, events, &on_network_event, m); | |
313 | if (r < 0) | |
314 | return r; | |
315 | ||
316 | return 0; | |
317 | } | |
318 | ||
78c6a153 | 319 | static int determine_hostname(char **llmnr_hostname, char **mdns_hostname) { |
eb60f9cd | 320 | _cleanup_free_ char *h = NULL, *n = NULL; |
78c6a153 LP |
321 | char label[DNS_LABEL_MAX]; |
322 | const char *p; | |
323 | int r, k; | |
eb60f9cd | 324 | |
78c6a153 LP |
325 | assert(llmnr_hostname); |
326 | assert(mdns_hostname); | |
327 | ||
328 | /* Extract and normalize the first label of the locally | |
329 | * configured hostname, and check it's not "localhost". */ | |
eb60f9cd LP |
330 | |
331 | h = gethostname_malloc(); | |
332 | if (!h) | |
333 | return log_oom(); | |
334 | ||
78c6a153 LP |
335 | p = h; |
336 | r = dns_label_unescape(&p, label, sizeof(label)); | |
337 | if (r < 0) | |
338 | return log_error_errno(r, "Failed to unescape host name: %m"); | |
339 | if (r == 0) { | |
340 | log_error("Couldn't find a single label in hosntame."); | |
341 | return -EINVAL; | |
342 | } | |
343 | ||
344 | k = dns_label_undo_idna(label, r, label, sizeof(label)); | |
345 | if (k < 0) | |
346 | return log_error_errno(k, "Failed to undo IDNA: %m"); | |
347 | if (k > 0) | |
348 | r = k; | |
349 | ||
350 | if (!utf8_is_valid(label)) { | |
eb60f9cd LP |
351 | log_error("System hostname is not UTF-8 clean."); |
352 | return -EINVAL; | |
353 | } | |
354 | ||
422baca0 | 355 | r = dns_label_escape_new(label, r, &n); |
78c6a153 LP |
356 | if (r < 0) |
357 | return log_error_errno(r, "Failed to escape host name: %m"); | |
358 | ||
359 | if (is_localhost(n)) { | |
360 | log_debug("System hostname is 'localhost', ignoring."); | |
361 | return -EINVAL; | |
eb60f9cd LP |
362 | } |
363 | ||
78c6a153 LP |
364 | r = dns_name_concat(n, "local", mdns_hostname); |
365 | if (r < 0) | |
366 | return log_error_errno(r, "Failed to determine mDNS hostname: %m"); | |
367 | ||
368 | *llmnr_hostname = n; | |
eb60f9cd LP |
369 | n = NULL; |
370 | ||
371 | return 0; | |
372 | } | |
373 | ||
374 | static int on_hostname_change(sd_event_source *es, int fd, uint32_t revents, void *userdata) { | |
78c6a153 | 375 | _cleanup_free_ char *llmnr_hostname = NULL, *mdns_hostname = NULL; |
eb60f9cd LP |
376 | Manager *m = userdata; |
377 | int r; | |
378 | ||
379 | assert(m); | |
380 | ||
78c6a153 | 381 | r = determine_hostname(&llmnr_hostname, &mdns_hostname); |
eb60f9cd LP |
382 | if (r < 0) |
383 | return 0; /* ignore invalid hostnames */ | |
384 | ||
78c6a153 | 385 | if (streq(llmnr_hostname, m->llmnr_hostname) && streq(mdns_hostname, m->mdns_hostname)) |
eb60f9cd LP |
386 | return 0; |
387 | ||
78c6a153 LP |
388 | log_info("System hostname changed to '%s'.", llmnr_hostname); |
389 | ||
390 | free(m->llmnr_hostname); | |
391 | free(m->mdns_hostname); | |
392 | ||
393 | m->llmnr_hostname = llmnr_hostname; | |
394 | m->mdns_hostname = mdns_hostname; | |
395 | ||
396 | llmnr_hostname = mdns_hostname = NULL; | |
eb60f9cd LP |
397 | |
398 | manager_refresh_rrs(m); | |
399 | ||
400 | return 0; | |
401 | } | |
402 | ||
403 | static int manager_watch_hostname(Manager *m) { | |
eb60f9cd LP |
404 | int r; |
405 | ||
406 | assert(m); | |
407 | ||
408 | m->hostname_fd = open("/proc/sys/kernel/hostname", O_RDONLY|O_CLOEXEC|O_NDELAY|O_NOCTTY); | |
409 | if (m->hostname_fd < 0) { | |
56f64d95 | 410 | log_warning_errno(errno, "Failed to watch hostname: %m"); |
eb60f9cd LP |
411 | return 0; |
412 | } | |
413 | ||
414 | r = sd_event_add_io(m->event, &m->hostname_event_source, m->hostname_fd, 0, on_hostname_change, m); | |
415 | if (r < 0) { | |
416 | if (r == -EPERM) | |
417 | /* kernels prior to 3.2 don't support polling this file. Ignore the failure. */ | |
418 | m->hostname_fd = safe_close(m->hostname_fd); | |
8d3d7072 MS |
419 | else |
420 | return log_error_errno(r, "Failed to add hostname event source: %m"); | |
eb60f9cd LP |
421 | } |
422 | ||
78c6a153 | 423 | r = determine_hostname(&m->llmnr_hostname, &m->mdns_hostname); |
eb60f9cd LP |
424 | if (r < 0) { |
425 | log_info("Defaulting to hostname 'linux'."); | |
78c6a153 LP |
426 | m->llmnr_hostname = strdup("linux"); |
427 | if (!m->llmnr_hostname) | |
428 | return log_oom(); | |
429 | ||
430 | m->mdns_hostname = strdup("linux.local"); | |
431 | if (!m->mdns_hostname) | |
eb60f9cd LP |
432 | return log_oom(); |
433 | } else | |
78c6a153 | 434 | log_info("Using system hostname '%s'.", m->llmnr_hostname); |
eb60f9cd LP |
435 | |
436 | return 0; | |
437 | } | |
438 | ||
4d506d6b LP |
439 | static int manager_sigusr1(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) { |
440 | _cleanup_free_ char *buffer = NULL; | |
441 | _cleanup_fclose_ FILE *f = NULL; | |
442 | Manager *m = userdata; | |
443 | size_t size = 0; | |
444 | DnsScope *scope; | |
445 | ||
446 | assert(s); | |
447 | assert(si); | |
448 | assert(m); | |
449 | ||
450 | f = open_memstream(&buffer, &size); | |
451 | if (!f) | |
452 | return log_oom(); | |
453 | ||
454 | LIST_FOREACH(scopes, scope, m->dns_scopes) | |
455 | dns_scope_dump(scope, f); | |
456 | ||
457 | if (fflush_and_check(f) < 0) | |
458 | return log_oom(); | |
459 | ||
460 | log_dump(LOG_INFO, buffer); | |
461 | return 0; | |
462 | } | |
463 | ||
091a364c | 464 | int manager_new(Manager **ret) { |
74b2466e | 465 | _cleanup_(manager_freep) Manager *m = NULL; |
091a364c TG |
466 | int r; |
467 | ||
c92e531c LP |
468 | assert(ret); |
469 | ||
091a364c TG |
470 | m = new0(Manager, 1); |
471 | if (!m) | |
472 | return -ENOMEM; | |
473 | ||
1716f6dc | 474 | m->llmnr_ipv4_udp_fd = m->llmnr_ipv6_udp_fd = -1; |
623a4c97 | 475 | m->llmnr_ipv4_tcp_fd = m->llmnr_ipv6_tcp_fd = -1; |
bc7702b0 | 476 | m->mdns_ipv4_fd = m->mdns_ipv6_fd = -1; |
eb60f9cd | 477 | m->hostname_fd = -1; |
1716f6dc | 478 | |
af49ca27 | 479 | m->llmnr_support = RESOLVE_SUPPORT_YES; |
ad6c0475 LP |
480 | m->mdns_support = RESOLVE_SUPPORT_NO; |
481 | m->dnssec_mode = DNSSEC_NO; | |
5cb36f41 | 482 | m->read_resolv_conf = true; |
00fa60ae | 483 | m->need_builtin_fallbacks = true; |
091a364c | 484 | |
0d2cd476 LP |
485 | r = dns_trust_anchor_load(&m->trust_anchor); |
486 | if (r < 0) | |
487 | return r; | |
488 | ||
ad6c0475 LP |
489 | r = manager_parse_config_file(m); |
490 | if (r < 0) | |
491 | return r; | |
492 | ||
091a364c TG |
493 | r = sd_event_default(&m->event); |
494 | if (r < 0) | |
495 | return r; | |
496 | ||
497 | sd_event_add_signal(m->event, NULL, SIGTERM, NULL, NULL); | |
498 | sd_event_add_signal(m->event, NULL, SIGINT, NULL, NULL); | |
499 | ||
500 | sd_event_set_watchdog(m->event, true); | |
501 | ||
eb60f9cd LP |
502 | r = manager_watch_hostname(m); |
503 | if (r < 0) | |
504 | return r; | |
505 | ||
1716f6dc | 506 | r = dns_scope_new(m, &m->unicast_scope, NULL, DNS_PROTOCOL_DNS, AF_UNSPEC); |
74b2466e LP |
507 | if (r < 0) |
508 | return r; | |
509 | ||
510 | r = manager_network_monitor_listen(m); | |
511 | if (r < 0) | |
512 | return r; | |
513 | ||
514 | r = manager_rtnl_listen(m); | |
515 | if (r < 0) | |
516 | return r; | |
517 | ||
518 | r = manager_connect_bus(m); | |
519 | if (r < 0) | |
520 | return r; | |
521 | ||
4d506d6b LP |
522 | (void) sd_event_add_signal(m->event, &m->sigusr1_event_source, SIGUSR1, manager_sigusr1, m); |
523 | ||
091a364c TG |
524 | *ret = m; |
525 | m = NULL; | |
526 | ||
527 | return 0; | |
528 | } | |
529 | ||
edc501d4 LP |
530 | int manager_start(Manager *m) { |
531 | int r; | |
532 | ||
533 | assert(m); | |
534 | ||
535 | r = manager_llmnr_start(m); | |
536 | if (r < 0) | |
537 | return r; | |
538 | ||
bc7702b0 DM |
539 | r = manager_mdns_start(m); |
540 | if (r < 0) | |
541 | return r; | |
542 | ||
edc501d4 LP |
543 | return 0; |
544 | } | |
545 | ||
74b2466e LP |
546 | Manager *manager_free(Manager *m) { |
547 | Link *l; | |
091a364c TG |
548 | |
549 | if (!m) | |
74b2466e LP |
550 | return NULL; |
551 | ||
4b95f179 LP |
552 | dns_server_unlink_all(m->dns_servers); |
553 | dns_server_unlink_all(m->fallback_dns_servers); | |
a51c1048 LP |
554 | dns_search_domain_unlink_all(m->search_domains); |
555 | ||
74b2466e LP |
556 | while ((l = hashmap_first(m->links))) |
557 | link_free(l); | |
f0e15467 LP |
558 | |
559 | while (m->dns_queries) | |
560 | dns_query_free(m->dns_queries); | |
74b2466e | 561 | |
cab5b059 LP |
562 | dns_scope_free(m->unicast_scope); |
563 | ||
f0e15467 LP |
564 | hashmap_free(m->links); |
565 | hashmap_free(m->dns_transactions); | |
566 | ||
096b6773 LP |
567 | sd_event_source_unref(m->network_event_source); |
568 | sd_network_monitor_unref(m->network_monitor); | |
091a364c | 569 | |
a564ca2f LP |
570 | sd_netlink_unref(m->rtnl); |
571 | sd_event_source_unref(m->rtnl_event_source); | |
572 | ||
edc501d4 | 573 | manager_llmnr_stop(m); |
bc7702b0 | 574 | manager_mdns_stop(m); |
623a4c97 | 575 | |
902bb5d8 | 576 | sd_bus_slot_unref(m->prepare_for_sleep_slot); |
74b2466e LP |
577 | sd_event_source_unref(m->bus_retry_event_source); |
578 | sd_bus_unref(m->bus); | |
091a364c | 579 | |
4d506d6b LP |
580 | sd_event_source_unref(m->sigusr1_event_source); |
581 | ||
74b2466e | 582 | sd_event_unref(m->event); |
623a4c97 | 583 | |
78c6a153 LP |
584 | dns_resource_key_unref(m->llmnr_host_ipv4_key); |
585 | dns_resource_key_unref(m->llmnr_host_ipv6_key); | |
eb60f9cd | 586 | |
eb60f9cd | 587 | sd_event_source_unref(m->hostname_event_source); |
d9fcf2ba | 588 | safe_close(m->hostname_fd); |
78c6a153 LP |
589 | free(m->llmnr_hostname); |
590 | free(m->mdns_hostname); | |
eb60f9cd | 591 | |
0d2cd476 LP |
592 | dns_trust_anchor_flush(&m->trust_anchor); |
593 | ||
091a364c | 594 | free(m); |
74b2466e LP |
595 | |
596 | return NULL; | |
091a364c TG |
597 | } |
598 | ||
1716f6dc | 599 | int manager_recv(Manager *m, int fd, DnsProtocol protocol, DnsPacket **ret) { |
74b2466e | 600 | _cleanup_(dns_packet_unrefp) DnsPacket *p = NULL; |
1716f6dc LP |
601 | union { |
602 | struct cmsghdr header; /* For alignment */ | |
40a1eebd | 603 | uint8_t buffer[CMSG_SPACE(MAXSIZE(struct in_pktinfo, struct in6_pktinfo)) |
1716f6dc | 604 | + CMSG_SPACE(int) /* ttl/hoplimit */ |
623a4c97 | 605 | + EXTRA_CMSG_SPACE /* kernel appears to require extra buffer space */]; |
1716f6dc LP |
606 | } control; |
607 | union sockaddr_union sa; | |
74b2466e | 608 | struct msghdr mh = {}; |
1716f6dc | 609 | struct cmsghdr *cmsg; |
74b2466e | 610 | struct iovec iov; |
1716f6dc | 611 | int ms = 0, r; |
74b2466e LP |
612 | ssize_t l; |
613 | ||
614 | assert(m); | |
1716f6dc | 615 | assert(fd >= 0); |
74b2466e LP |
616 | assert(ret); |
617 | ||
74b2466e LP |
618 | r = ioctl(fd, FIONREAD, &ms); |
619 | if (r < 0) | |
620 | return -errno; | |
621 | if (ms < 0) | |
622 | return -EIO; | |
623 | ||
1716f6dc | 624 | r = dns_packet_new(&p, protocol, ms); |
74b2466e LP |
625 | if (r < 0) |
626 | return r; | |
627 | ||
628 | iov.iov_base = DNS_PACKET_DATA(p); | |
629 | iov.iov_len = p->allocated; | |
630 | ||
1716f6dc LP |
631 | mh.msg_name = &sa.sa; |
632 | mh.msg_namelen = sizeof(sa); | |
74b2466e LP |
633 | mh.msg_iov = &iov; |
634 | mh.msg_iovlen = 1; | |
1716f6dc LP |
635 | mh.msg_control = &control; |
636 | mh.msg_controllen = sizeof(control); | |
74b2466e | 637 | |
a38d9945 | 638 | l = recvmsg(fd, &mh, 0); |
74b2466e | 639 | if (l < 0) { |
ad867662 | 640 | if (errno == EAGAIN || errno == EINTR) |
74b2466e LP |
641 | return 0; |
642 | ||
643 | return -errno; | |
091a364c TG |
644 | } |
645 | ||
74b2466e LP |
646 | if (l <= 0) |
647 | return -EIO; | |
091a364c | 648 | |
1716f6dc LP |
649 | assert(!(mh.msg_flags & MSG_CTRUNC)); |
650 | assert(!(mh.msg_flags & MSG_TRUNC)); | |
651 | ||
74b2466e | 652 | p->size = (size_t) l; |
091a364c | 653 | |
1716f6dc | 654 | p->family = sa.sa.sa_family; |
623a4c97 LP |
655 | p->ipproto = IPPROTO_UDP; |
656 | if (p->family == AF_INET) { | |
1716f6dc | 657 | p->sender.in = sa.in.sin_addr; |
623a4c97 LP |
658 | p->sender_port = be16toh(sa.in.sin_port); |
659 | } else if (p->family == AF_INET6) { | |
1716f6dc | 660 | p->sender.in6 = sa.in6.sin6_addr; |
623a4c97 LP |
661 | p->sender_port = be16toh(sa.in6.sin6_port); |
662 | p->ifindex = sa.in6.sin6_scope_id; | |
663 | } else | |
1716f6dc | 664 | return -EAFNOSUPPORT; |
74b2466e | 665 | |
2a1288ff | 666 | CMSG_FOREACH(cmsg, &mh) { |
74b2466e | 667 | |
1716f6dc LP |
668 | if (cmsg->cmsg_level == IPPROTO_IPV6) { |
669 | assert(p->family == AF_INET6); | |
74b2466e | 670 | |
1716f6dc | 671 | switch (cmsg->cmsg_type) { |
74b2466e | 672 | |
1716f6dc LP |
673 | case IPV6_PKTINFO: { |
674 | struct in6_pktinfo *i = (struct in6_pktinfo*) CMSG_DATA(cmsg); | |
74b2466e | 675 | |
623a4c97 LP |
676 | if (p->ifindex <= 0) |
677 | p->ifindex = i->ipi6_ifindex; | |
678 | ||
1716f6dc LP |
679 | p->destination.in6 = i->ipi6_addr; |
680 | break; | |
681 | } | |
74b2466e | 682 | |
1716f6dc LP |
683 | case IPV6_HOPLIMIT: |
684 | p->ttl = *(int *) CMSG_DATA(cmsg); | |
685 | break; | |
74b2466e | 686 | |
1716f6dc LP |
687 | } |
688 | } else if (cmsg->cmsg_level == IPPROTO_IP) { | |
689 | assert(p->family == AF_INET); | |
74b2466e | 690 | |
1716f6dc | 691 | switch (cmsg->cmsg_type) { |
74b2466e | 692 | |
1716f6dc LP |
693 | case IP_PKTINFO: { |
694 | struct in_pktinfo *i = (struct in_pktinfo*) CMSG_DATA(cmsg); | |
091a364c | 695 | |
623a4c97 LP |
696 | if (p->ifindex <= 0) |
697 | p->ifindex = i->ipi_ifindex; | |
698 | ||
1716f6dc LP |
699 | p->destination.in = i->ipi_addr; |
700 | break; | |
701 | } | |
74b2466e | 702 | |
623a4c97 | 703 | case IP_TTL: |
1716f6dc LP |
704 | p->ttl = *(int *) CMSG_DATA(cmsg); |
705 | break; | |
706 | } | |
707 | } | |
708 | } | |
74b2466e | 709 | |
623a4c97 LP |
710 | /* The Linux kernel sets the interface index to the loopback |
711 | * device if the packet came from the local host since it | |
712 | * avoids the routing table in such a case. Let's unset the | |
713 | * interface index in such a case. */ | |
a5f03596 | 714 | if (p->ifindex == LOOPBACK_IFINDEX) |
623a4c97 LP |
715 | p->ifindex = 0; |
716 | ||
86ad4cd7 TG |
717 | if (protocol != DNS_PROTOCOL_DNS) { |
718 | /* If we don't know the interface index still, we look for the | |
719 | * first local interface with a matching address. Yuck! */ | |
720 | if (p->ifindex <= 0) | |
721 | p->ifindex = manager_find_ifindex(m, p->family, &p->destination); | |
722 | } | |
623a4c97 | 723 | |
74b2466e LP |
724 | *ret = p; |
725 | p = NULL; | |
726 | ||
727 | return 1; | |
728 | } | |
729 | ||
74b2466e LP |
730 | static int sendmsg_loop(int fd, struct msghdr *mh, int flags) { |
731 | int r; | |
732 | ||
733 | assert(fd >= 0); | |
734 | assert(mh); | |
735 | ||
736 | for (;;) { | |
737 | if (sendmsg(fd, mh, flags) >= 0) | |
738 | return 0; | |
739 | ||
740 | if (errno == EINTR) | |
741 | continue; | |
742 | ||
743 | if (errno != EAGAIN) | |
744 | return -errno; | |
745 | ||
746 | r = fd_wait_for_event(fd, POLLOUT, SEND_TIMEOUT_USEC); | |
747 | if (r < 0) | |
748 | return r; | |
749 | if (r == 0) | |
750 | return -ETIMEDOUT; | |
751 | } | |
752 | } | |
753 | ||
72290734 TG |
754 | static int write_loop(int fd, void *message, size_t length) { |
755 | int r; | |
756 | ||
757 | assert(fd >= 0); | |
758 | assert(message); | |
759 | ||
760 | for (;;) { | |
761 | if (write(fd, message, length) >= 0) | |
762 | return 0; | |
763 | ||
764 | if (errno == EINTR) | |
765 | continue; | |
766 | ||
767 | if (errno != EAGAIN) | |
768 | return -errno; | |
769 | ||
770 | r = fd_wait_for_event(fd, POLLOUT, SEND_TIMEOUT_USEC); | |
771 | if (r < 0) | |
772 | return r; | |
773 | if (r == 0) | |
774 | return -ETIMEDOUT; | |
775 | } | |
776 | } | |
777 | ||
778 | int manager_write(Manager *m, int fd, DnsPacket *p) { | |
779 | int r; | |
780 | ||
deb3f3d3 | 781 | log_debug("Sending %s packet with id %" PRIu16 ".", DNS_PACKET_QR(p) ? "response" : "query", DNS_PACKET_ID(p)); |
72290734 TG |
782 | |
783 | r = write_loop(fd, DNS_PACKET_DATA(p), p->size); | |
784 | if (r < 0) | |
785 | return r; | |
786 | ||
787 | return 0; | |
788 | } | |
789 | ||
623a4c97 | 790 | static int manager_ipv4_send(Manager *m, int fd, int ifindex, const struct in_addr *addr, uint16_t port, DnsPacket *p) { |
74b2466e LP |
791 | union sockaddr_union sa = { |
792 | .in.sin_family = AF_INET, | |
74b2466e | 793 | }; |
1716f6dc LP |
794 | union { |
795 | struct cmsghdr header; /* For alignment */ | |
796 | uint8_t buffer[CMSG_SPACE(sizeof(struct in_pktinfo))]; | |
797 | } control; | |
74b2466e LP |
798 | struct msghdr mh = {}; |
799 | struct iovec iov; | |
74b2466e LP |
800 | |
801 | assert(m); | |
1716f6dc LP |
802 | assert(fd >= 0); |
803 | assert(addr); | |
804 | assert(port > 0); | |
74b2466e LP |
805 | assert(p); |
806 | ||
74b2466e LP |
807 | iov.iov_base = DNS_PACKET_DATA(p); |
808 | iov.iov_len = p->size; | |
091a364c | 809 | |
1716f6dc LP |
810 | sa.in.sin_addr = *addr; |
811 | sa.in.sin_port = htobe16(port), | |
091a364c | 812 | |
74b2466e LP |
813 | mh.msg_iov = &iov; |
814 | mh.msg_iovlen = 1; | |
815 | mh.msg_name = &sa.sa; | |
816 | mh.msg_namelen = sizeof(sa.in); | |
091a364c | 817 | |
74b2466e LP |
818 | if (ifindex > 0) { |
819 | struct cmsghdr *cmsg; | |
820 | struct in_pktinfo *pi; | |
821 | ||
822 | zero(control); | |
823 | ||
1716f6dc | 824 | mh.msg_control = &control; |
74b2466e LP |
825 | mh.msg_controllen = CMSG_LEN(sizeof(struct in_pktinfo)); |
826 | ||
827 | cmsg = CMSG_FIRSTHDR(&mh); | |
828 | cmsg->cmsg_len = mh.msg_controllen; | |
829 | cmsg->cmsg_level = IPPROTO_IP; | |
830 | cmsg->cmsg_type = IP_PKTINFO; | |
831 | ||
832 | pi = (struct in_pktinfo*) CMSG_DATA(cmsg); | |
833 | pi->ipi_ifindex = ifindex; | |
834 | } | |
835 | ||
836 | return sendmsg_loop(fd, &mh, 0); | |
837 | } | |
838 | ||
623a4c97 | 839 | static int manager_ipv6_send(Manager *m, int fd, int ifindex, const struct in6_addr *addr, uint16_t port, DnsPacket *p) { |
74b2466e LP |
840 | union sockaddr_union sa = { |
841 | .in6.sin6_family = AF_INET6, | |
74b2466e | 842 | }; |
1716f6dc LP |
843 | union { |
844 | struct cmsghdr header; /* For alignment */ | |
845 | uint8_t buffer[CMSG_SPACE(sizeof(struct in6_pktinfo))]; | |
846 | } control; | |
74b2466e LP |
847 | struct msghdr mh = {}; |
848 | struct iovec iov; | |
74b2466e LP |
849 | |
850 | assert(m); | |
1716f6dc LP |
851 | assert(fd >= 0); |
852 | assert(addr); | |
853 | assert(port > 0); | |
74b2466e LP |
854 | assert(p); |
855 | ||
74b2466e LP |
856 | iov.iov_base = DNS_PACKET_DATA(p); |
857 | iov.iov_len = p->size; | |
858 | ||
1716f6dc LP |
859 | sa.in6.sin6_addr = *addr; |
860 | sa.in6.sin6_port = htobe16(port), | |
74b2466e LP |
861 | sa.in6.sin6_scope_id = ifindex; |
862 | ||
863 | mh.msg_iov = &iov; | |
864 | mh.msg_iovlen = 1; | |
865 | mh.msg_name = &sa.sa; | |
866 | mh.msg_namelen = sizeof(sa.in6); | |
867 | ||
868 | if (ifindex > 0) { | |
869 | struct cmsghdr *cmsg; | |
870 | struct in6_pktinfo *pi; | |
871 | ||
872 | zero(control); | |
873 | ||
1716f6dc | 874 | mh.msg_control = &control; |
74b2466e LP |
875 | mh.msg_controllen = CMSG_LEN(sizeof(struct in6_pktinfo)); |
876 | ||
877 | cmsg = CMSG_FIRSTHDR(&mh); | |
878 | cmsg->cmsg_len = mh.msg_controllen; | |
879 | cmsg->cmsg_level = IPPROTO_IPV6; | |
880 | cmsg->cmsg_type = IPV6_PKTINFO; | |
881 | ||
882 | pi = (struct in6_pktinfo*) CMSG_DATA(cmsg); | |
883 | pi->ipi6_ifindex = ifindex; | |
884 | } | |
885 | ||
886 | return sendmsg_loop(fd, &mh, 0); | |
887 | } | |
888 | ||
623a4c97 | 889 | int manager_send(Manager *m, int fd, int ifindex, int family, const union in_addr_union *addr, uint16_t port, DnsPacket *p) { |
1716f6dc LP |
890 | assert(m); |
891 | assert(fd >= 0); | |
892 | assert(addr); | |
893 | assert(port > 0); | |
894 | assert(p); | |
895 | ||
deb3f3d3 | 896 | log_debug("Sending %s packet with id %" PRIu16 " on interface %i/%s.", DNS_PACKET_QR(p) ? "response" : "query", DNS_PACKET_ID(p), ifindex, af_to_name(family)); |
a2a416f7 | 897 | |
1716f6dc LP |
898 | if (family == AF_INET) |
899 | return manager_ipv4_send(m, fd, ifindex, &addr->in, port, p); | |
900 | else if (family == AF_INET6) | |
901 | return manager_ipv6_send(m, fd, ifindex, &addr->in6, port, p); | |
902 | ||
903 | return -EAFNOSUPPORT; | |
904 | } | |
905 | ||
e1c95994 LP |
906 | uint32_t manager_find_mtu(Manager *m) { |
907 | uint32_t mtu = 0; | |
908 | Link *l; | |
909 | Iterator i; | |
910 | ||
911 | /* If we don't know on which link a DNS packet would be | |
912 | * delivered, let's find the largest MTU that works on all | |
913 | * interfaces we know of */ | |
914 | ||
915 | HASHMAP_FOREACH(l, m->links, i) { | |
916 | if (l->mtu <= 0) | |
917 | continue; | |
918 | ||
919 | if (mtu <= 0 || l->mtu < mtu) | |
920 | mtu = l->mtu; | |
921 | } | |
922 | ||
923 | return mtu; | |
924 | } | |
1716f6dc | 925 | |
623a4c97 | 926 | int manager_find_ifindex(Manager *m, int family, const union in_addr_union *in_addr) { |
ec2c5e43 LP |
927 | LinkAddress *a; |
928 | ||
929 | assert(m); | |
930 | ||
4e945a6f | 931 | a = manager_find_link_address(m, family, in_addr); |
ec2c5e43 LP |
932 | if (a) |
933 | return a->link->ifindex; | |
934 | ||
935 | return 0; | |
936 | } | |
937 | ||
eb60f9cd LP |
938 | void manager_refresh_rrs(Manager *m) { |
939 | Iterator i; | |
940 | Link *l; | |
941 | ||
942 | assert(m); | |
943 | ||
78c6a153 LP |
944 | m->llmnr_host_ipv4_key = dns_resource_key_unref(m->llmnr_host_ipv4_key); |
945 | m->llmnr_host_ipv6_key = dns_resource_key_unref(m->llmnr_host_ipv6_key); | |
eb60f9cd LP |
946 | |
947 | HASHMAP_FOREACH(l, m->links, i) { | |
948 | link_add_rrs(l, true); | |
949 | link_add_rrs(l, false); | |
950 | } | |
951 | } | |
952 | ||
ec2c5e43 LP |
953 | int manager_next_hostname(Manager *m) { |
954 | const char *p; | |
556a2294 | 955 | uint64_t u, a; |
78c6a153 LP |
956 | char *h, *k; |
957 | int r; | |
623a4c97 LP |
958 | |
959 | assert(m); | |
960 | ||
78c6a153 | 961 | p = strchr(m->llmnr_hostname, 0); |
ec2c5e43 LP |
962 | assert(p); |
963 | ||
78c6a153 | 964 | while (p > m->llmnr_hostname) { |
ec2c5e43 LP |
965 | if (!strchr("0123456789", p[-1])) |
966 | break; | |
967 | ||
968 | p--; | |
969 | } | |
970 | ||
971 | if (*p == 0 || safe_atou64(p, &u) < 0 || u <= 0) | |
972 | u = 1; | |
973 | ||
556a2294 LP |
974 | /* Add a random number to the old value. This way we can avoid |
975 | * that two hosts pick the same hostname, win on IPv4 and lose | |
976 | * on IPv6 (or vice versa), and pick the same hostname | |
977 | * replacement hostname, ad infinitum. We still want the | |
978 | * numbers to go up monotonically, hence we just add a random | |
979 | * value 1..10 */ | |
980 | ||
981 | random_bytes(&a, sizeof(a)); | |
982 | u += 1 + a % 10; | |
ec2c5e43 | 983 | |
78c6a153 | 984 | if (asprintf(&h, "%.*s%" PRIu64, (int) (p - m->llmnr_hostname), m->llmnr_hostname, u) < 0) |
ec2c5e43 LP |
985 | return -ENOMEM; |
986 | ||
78c6a153 LP |
987 | r = dns_name_concat(h, "local", &k); |
988 | if (r < 0) { | |
989 | free(h); | |
990 | return r; | |
991 | } | |
992 | ||
993 | log_info("Hostname conflict, changing published hostname from '%s' to '%s'.", m->llmnr_hostname, h); | |
994 | ||
995 | free(m->llmnr_hostname); | |
996 | m->llmnr_hostname = h; | |
ec2c5e43 | 997 | |
78c6a153 LP |
998 | free(m->mdns_hostname); |
999 | m->mdns_hostname = k; | |
ec2c5e43 | 1000 | |
eb60f9cd | 1001 | manager_refresh_rrs(m); |
623a4c97 LP |
1002 | |
1003 | return 0; | |
1004 | } | |
ec2c5e43 | 1005 | |
4e945a6f | 1006 | LinkAddress* manager_find_link_address(Manager *m, int family, const union in_addr_union *in_addr) { |
ec2c5e43 LP |
1007 | Iterator i; |
1008 | Link *l; | |
1009 | ||
1010 | assert(m); | |
1011 | ||
1012 | HASHMAP_FOREACH(l, m->links, i) { | |
1013 | LinkAddress *a; | |
1014 | ||
1015 | a = link_find_address(l, family, in_addr); | |
1016 | if (a) | |
1017 | return a; | |
1018 | } | |
1019 | ||
1020 | return NULL; | |
1021 | } | |
1022 | ||
a4076574 | 1023 | bool manager_our_packet(Manager *m, DnsPacket *p) { |
ec2c5e43 LP |
1024 | assert(m); |
1025 | assert(p); | |
1026 | ||
4e945a6f | 1027 | return !!manager_find_link_address(m, p->family, &p->sender); |
ec2c5e43 | 1028 | } |
4e945a6f | 1029 | |
a4076574 LP |
1030 | DnsScope* manager_find_scope(Manager *m, DnsPacket *p) { |
1031 | Link *l; | |
1032 | ||
1033 | assert(m); | |
1034 | assert(p); | |
1035 | ||
1036 | l = hashmap_get(m->links, INT_TO_PTR(p->ifindex)); | |
1037 | if (!l) | |
1038 | return NULL; | |
1039 | ||
b4f1862d DM |
1040 | switch (p->protocol) { |
1041 | case DNS_PROTOCOL_LLMNR: | |
a4076574 LP |
1042 | if (p->family == AF_INET) |
1043 | return l->llmnr_ipv4_scope; | |
1044 | else if (p->family == AF_INET6) | |
1045 | return l->llmnr_ipv6_scope; | |
b4f1862d DM |
1046 | |
1047 | break; | |
1048 | ||
1049 | case DNS_PROTOCOL_MDNS: | |
1050 | if (p->family == AF_INET) | |
1051 | return l->mdns_ipv4_scope; | |
1052 | else if (p->family == AF_INET6) | |
1053 | return l->mdns_ipv6_scope; | |
1054 | ||
1055 | break; | |
1056 | ||
1057 | default: | |
1058 | break; | |
a4076574 LP |
1059 | } |
1060 | ||
1061 | return NULL; | |
1062 | } | |
1063 | ||
902bb5d8 LP |
1064 | void manager_verify_all(Manager *m) { |
1065 | DnsScope *s; | |
1066 | ||
1067 | assert(m); | |
1068 | ||
1069 | LIST_FOREACH(scopes, s, m->dns_scopes) | |
1070 | dns_zone_verify_all(&s->zone); | |
1071 | } | |
1072 | ||
78c6a153 | 1073 | int manager_is_own_hostname(Manager *m, const char *name) { |
78c6a153 LP |
1074 | int r; |
1075 | ||
1076 | assert(m); | |
1077 | assert(name); | |
1078 | ||
1079 | if (m->llmnr_hostname) { | |
1080 | r = dns_name_equal(name, m->llmnr_hostname); | |
1081 | if (r != 0) | |
1082 | return r; | |
1083 | } | |
1084 | ||
1085 | if (m->mdns_hostname) | |
1086 | return dns_name_equal(name, m->mdns_hostname); | |
1087 | ||
1088 | return 0; | |
1089 | } | |
1090 | ||
9176a57c LP |
1091 | int manager_compile_dns_servers(Manager *m, OrderedSet **dns) { |
1092 | DnsServer *s; | |
1093 | Iterator i; | |
1094 | Link *l; | |
1095 | int r; | |
1096 | ||
1097 | assert(m); | |
1098 | assert(dns); | |
1099 | ||
1100 | r = ordered_set_ensure_allocated(dns, &dns_server_hash_ops); | |
1101 | if (r < 0) | |
1102 | return r; | |
1103 | ||
1104 | /* First add the system-wide servers and domains */ | |
1105 | LIST_FOREACH(servers, s, m->dns_servers) { | |
1106 | r = ordered_set_put(*dns, s); | |
1107 | if (r == -EEXIST) | |
1108 | continue; | |
1109 | if (r < 0) | |
1110 | return r; | |
1111 | } | |
1112 | ||
1113 | /* Then, add the per-link servers */ | |
1114 | HASHMAP_FOREACH(l, m->links, i) { | |
1115 | LIST_FOREACH(servers, s, l->dns_servers) { | |
1116 | r = ordered_set_put(*dns, s); | |
1117 | if (r == -EEXIST) | |
1118 | continue; | |
1119 | if (r < 0) | |
1120 | return r; | |
1121 | } | |
1122 | } | |
1123 | ||
1124 | /* If we found nothing, add the fallback servers */ | |
1125 | if (ordered_set_isempty(*dns)) { | |
1126 | LIST_FOREACH(servers, s, m->fallback_dns_servers) { | |
1127 | r = ordered_set_put(*dns, s); | |
1128 | if (r == -EEXIST) | |
1129 | continue; | |
1130 | if (r < 0) | |
1131 | return r; | |
1132 | } | |
1133 | } | |
1134 | ||
1135 | return 0; | |
1136 | } | |
1137 | ||
1138 | int manager_compile_search_domains(Manager *m, OrderedSet **domains) { | |
1139 | DnsSearchDomain *d; | |
1140 | Iterator i; | |
1141 | Link *l; | |
1142 | int r; | |
1143 | ||
1144 | assert(m); | |
1145 | assert(domains); | |
1146 | ||
1147 | r = ordered_set_ensure_allocated(domains, &dns_name_hash_ops); | |
1148 | if (r < 0) | |
1149 | return r; | |
1150 | ||
1151 | LIST_FOREACH(domains, d, m->search_domains) { | |
1152 | r = ordered_set_put(*domains, d->name); | |
1153 | if (r == -EEXIST) | |
1154 | continue; | |
1155 | if (r < 0) | |
1156 | return r; | |
1157 | } | |
1158 | ||
1159 | HASHMAP_FOREACH(l, m->links, i) { | |
1160 | ||
1161 | LIST_FOREACH(domains, d, l->search_domains) { | |
1162 | r = ordered_set_put(*domains, d->name); | |
1163 | if (r == -EEXIST) | |
1164 | continue; | |
1165 | if (r < 0) | |
1166 | return r; | |
1167 | } | |
1168 | } | |
1169 | ||
1170 | return 0; | |
1171 | } |