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091a364c TG |
1 | /*** |
2 | This file is part of systemd. | |
3 | ||
4 | Copyright 2014 Tom Gundersen <teg@jklm.no> | |
5 | ||
6 | systemd is free software; you can redistribute it and/or modify it | |
7 | under the terms of the GNU Lesser General Public License as published by | |
8 | the Free Software Foundation; either version 2.1 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | systemd is distributed in the hope that it will be useful, but | |
12 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | Lesser General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU Lesser General Public License | |
17 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
18 | ***/ | |
19 | ||
07630cea LP |
20 | #include <netinet/in.h> |
21 | #include <poll.h> | |
74b2466e | 22 | #include <sys/ioctl.h> |
091a364c | 23 | |
a2a416f7 | 24 | #include "af-list.h" |
b5efdb8a | 25 | #include "alloc-util.h" |
07630cea | 26 | #include "dns-domain.h" |
3ffd4af2 | 27 | #include "fd-util.h" |
a5a807e6 | 28 | #include "fileio-label.h" |
07630cea | 29 | #include "hostname-util.h" |
c004493c | 30 | #include "io-util.h" |
07630cea LP |
31 | #include "netlink-util.h" |
32 | #include "network-internal.h" | |
822db23c | 33 | #include "ordered-set.h" |
6bedfcbb | 34 | #include "parse-util.h" |
3df3e884 | 35 | #include "random-util.h" |
39d8db04 | 36 | #include "resolved-bus.h" |
07630cea | 37 | #include "resolved-conf.h" |
dd0bc0f1 | 38 | #include "resolved-etc-hosts.h" |
5f402ae8 | 39 | #include "resolved-llmnr.h" |
07630cea | 40 | #include "resolved-manager.h" |
bc7702b0 | 41 | #include "resolved-mdns.h" |
dd0bc0f1 | 42 | #include "resolved-resolv-conf.h" |
07630cea | 43 | #include "socket-util.h" |
8b43440b | 44 | #include "string-table.h" |
07630cea LP |
45 | #include "string-util.h" |
46 | #include "utf8.h" | |
74b2466e LP |
47 | |
48 | #define SEND_TIMEOUT_USEC (200 * USEC_PER_MSEC) | |
49 | ||
1c4baffc | 50 | static int manager_process_link(sd_netlink *rtnl, sd_netlink_message *mm, void *userdata) { |
74b2466e LP |
51 | Manager *m = userdata; |
52 | uint16_t type; | |
53 | Link *l; | |
54 | int ifindex, r; | |
55 | ||
56 | assert(rtnl); | |
57 | assert(m); | |
58 | assert(mm); | |
59 | ||
1c4baffc | 60 | r = sd_netlink_message_get_type(mm, &type); |
74b2466e LP |
61 | if (r < 0) |
62 | goto fail; | |
63 | ||
64 | r = sd_rtnl_message_link_get_ifindex(mm, &ifindex); | |
65 | if (r < 0) | |
66 | goto fail; | |
67 | ||
68 | l = hashmap_get(m->links, INT_TO_PTR(ifindex)); | |
69 | ||
70 | switch (type) { | |
71 | ||
a2a416f7 LP |
72 | case RTM_NEWLINK:{ |
73 | bool is_new = !l; | |
74b2466e | 74 | |
a2a416f7 | 75 | if (!l) { |
74b2466e LP |
76 | r = link_new(m, &l, ifindex); |
77 | if (r < 0) | |
78 | goto fail; | |
79 | } | |
80 | ||
81 | r = link_update_rtnl(l, mm); | |
82 | if (r < 0) | |
83 | goto fail; | |
84 | ||
21d73c87 LP |
85 | r = link_update_monitor(l); |
86 | if (r < 0) | |
87 | goto fail; | |
88 | ||
a2a416f7 LP |
89 | if (is_new) |
90 | log_debug("Found new link %i/%s", ifindex, l->name); | |
91 | ||
74b2466e | 92 | break; |
a2a416f7 | 93 | } |
74b2466e LP |
94 | |
95 | case RTM_DELLINK: | |
96 | if (l) { | |
a2a416f7 | 97 | log_debug("Removing link %i/%s", l->ifindex, l->name); |
74b2466e LP |
98 | link_free(l); |
99 | } | |
100 | ||
101 | break; | |
102 | } | |
103 | ||
104 | return 0; | |
105 | ||
106 | fail: | |
da927ba9 | 107 | log_warning_errno(r, "Failed to process RTNL link message: %m"); |
74b2466e LP |
108 | return 0; |
109 | } | |
110 | ||
1c4baffc | 111 | static int manager_process_address(sd_netlink *rtnl, sd_netlink_message *mm, void *userdata) { |
74b2466e LP |
112 | Manager *m = userdata; |
113 | union in_addr_union address; | |
74b2466e | 114 | uint16_t type; |
0dd25fb9 | 115 | int r, ifindex, family; |
74b2466e LP |
116 | LinkAddress *a; |
117 | Link *l; | |
118 | ||
119 | assert(rtnl); | |
120 | assert(mm); | |
121 | assert(m); | |
122 | ||
1c4baffc | 123 | r = sd_netlink_message_get_type(mm, &type); |
74b2466e LP |
124 | if (r < 0) |
125 | goto fail; | |
126 | ||
127 | r = sd_rtnl_message_addr_get_ifindex(mm, &ifindex); | |
128 | if (r < 0) | |
129 | goto fail; | |
130 | ||
131 | l = hashmap_get(m->links, INT_TO_PTR(ifindex)); | |
132 | if (!l) | |
133 | return 0; | |
134 | ||
135 | r = sd_rtnl_message_addr_get_family(mm, &family); | |
136 | if (r < 0) | |
137 | goto fail; | |
138 | ||
139 | switch (family) { | |
140 | ||
141 | case AF_INET: | |
1c4baffc | 142 | r = sd_netlink_message_read_in_addr(mm, IFA_LOCAL, &address.in); |
74b2466e | 143 | if (r < 0) { |
1c4baffc | 144 | r = sd_netlink_message_read_in_addr(mm, IFA_ADDRESS, &address.in); |
74b2466e LP |
145 | if (r < 0) |
146 | goto fail; | |
147 | } | |
148 | ||
149 | break; | |
150 | ||
151 | case AF_INET6: | |
1c4baffc | 152 | r = sd_netlink_message_read_in6_addr(mm, IFA_LOCAL, &address.in6); |
74b2466e | 153 | if (r < 0) { |
1c4baffc | 154 | r = sd_netlink_message_read_in6_addr(mm, IFA_ADDRESS, &address.in6); |
74b2466e LP |
155 | if (r < 0) |
156 | goto fail; | |
157 | } | |
158 | ||
159 | break; | |
160 | ||
161 | default: | |
162 | return 0; | |
163 | } | |
164 | ||
165 | a = link_find_address(l, family, &address); | |
166 | ||
167 | switch (type) { | |
168 | ||
169 | case RTM_NEWADDR: | |
170 | ||
171 | if (!a) { | |
172 | r = link_address_new(l, &a, family, &address); | |
173 | if (r < 0) | |
174 | return r; | |
175 | } | |
176 | ||
177 | r = link_address_update_rtnl(a, mm); | |
178 | if (r < 0) | |
179 | return r; | |
180 | ||
181 | break; | |
182 | ||
183 | case RTM_DELADDR: | |
3e044c49 | 184 | link_address_free(a); |
74b2466e LP |
185 | break; |
186 | } | |
187 | ||
188 | return 0; | |
189 | ||
190 | fail: | |
da927ba9 | 191 | log_warning_errno(r, "Failed to process RTNL address message: %m"); |
74b2466e LP |
192 | return 0; |
193 | } | |
194 | ||
74b2466e | 195 | static int manager_rtnl_listen(Manager *m) { |
4afd3348 | 196 | _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL; |
1c4baffc | 197 | sd_netlink_message *i; |
74b2466e LP |
198 | int r; |
199 | ||
200 | assert(m); | |
201 | ||
cc98b302 | 202 | /* First, subscribe to interfaces coming and going */ |
1c4baffc | 203 | r = sd_netlink_open(&m->rtnl); |
74b2466e LP |
204 | if (r < 0) |
205 | return r; | |
206 | ||
2d895038 | 207 | r = sd_netlink_attach_event(m->rtnl, m->event, SD_EVENT_PRIORITY_IMPORTANT); |
74b2466e LP |
208 | if (r < 0) |
209 | return r; | |
210 | ||
1c4baffc | 211 | r = sd_netlink_add_match(m->rtnl, RTM_NEWLINK, manager_process_link, m); |
74b2466e LP |
212 | if (r < 0) |
213 | return r; | |
214 | ||
1c4baffc | 215 | r = sd_netlink_add_match(m->rtnl, RTM_DELLINK, manager_process_link, m); |
74b2466e LP |
216 | if (r < 0) |
217 | return r; | |
218 | ||
1c4baffc | 219 | r = sd_netlink_add_match(m->rtnl, RTM_NEWADDR, manager_process_address, m); |
74b2466e LP |
220 | if (r < 0) |
221 | return r; | |
091a364c | 222 | |
1c4baffc | 223 | r = sd_netlink_add_match(m->rtnl, RTM_DELADDR, manager_process_address, m); |
74b2466e LP |
224 | if (r < 0) |
225 | return r; | |
226 | ||
227 | /* Then, enumerate all links */ | |
228 | r = sd_rtnl_message_new_link(m->rtnl, &req, RTM_GETLINK, 0); | |
229 | if (r < 0) | |
230 | return r; | |
231 | ||
1c4baffc | 232 | r = sd_netlink_message_request_dump(req, true); |
74b2466e LP |
233 | if (r < 0) |
234 | return r; | |
235 | ||
1c4baffc | 236 | r = sd_netlink_call(m->rtnl, req, 0, &reply); |
74b2466e LP |
237 | if (r < 0) |
238 | return r; | |
239 | ||
1c4baffc | 240 | for (i = reply; i; i = sd_netlink_message_next(i)) { |
74b2466e LP |
241 | r = manager_process_link(m->rtnl, i, m); |
242 | if (r < 0) | |
243 | return r; | |
244 | } | |
245 | ||
1c4baffc TG |
246 | req = sd_netlink_message_unref(req); |
247 | reply = sd_netlink_message_unref(reply); | |
74b2466e LP |
248 | |
249 | /* Finally, enumerate all addresses, too */ | |
250 | r = sd_rtnl_message_new_addr(m->rtnl, &req, RTM_GETADDR, 0, AF_UNSPEC); | |
251 | if (r < 0) | |
252 | return r; | |
253 | ||
1c4baffc | 254 | r = sd_netlink_message_request_dump(req, true); |
74b2466e LP |
255 | if (r < 0) |
256 | return r; | |
257 | ||
1c4baffc | 258 | r = sd_netlink_call(m->rtnl, req, 0, &reply); |
74b2466e LP |
259 | if (r < 0) |
260 | return r; | |
261 | ||
1c4baffc | 262 | for (i = reply; i; i = sd_netlink_message_next(i)) { |
74b2466e LP |
263 | r = manager_process_address(m->rtnl, i, m); |
264 | if (r < 0) | |
265 | return r; | |
266 | } | |
267 | ||
268 | return r; | |
269 | } | |
270 | ||
271 | static int on_network_event(sd_event_source *s, int fd, uint32_t revents, void *userdata) { | |
272 | Manager *m = userdata; | |
273 | Iterator i; | |
274 | Link *l; | |
275 | int r; | |
276 | ||
277 | assert(m); | |
278 | ||
279 | sd_network_monitor_flush(m->network_monitor); | |
280 | ||
281 | HASHMAP_FOREACH(l, m->links, i) { | |
282 | r = link_update_monitor(l); | |
283 | if (r < 0) | |
da927ba9 | 284 | log_warning_errno(r, "Failed to update monitor information for %i: %m", l->ifindex); |
74b2466e LP |
285 | } |
286 | ||
7207052d | 287 | (void) manager_write_resolv_conf(m); |
74b2466e LP |
288 | |
289 | return 0; | |
290 | } | |
291 | ||
292 | static int manager_network_monitor_listen(Manager *m) { | |
293 | int r, fd, events; | |
294 | ||
295 | assert(m); | |
296 | ||
0014a4ad | 297 | r = sd_network_monitor_new(&m->network_monitor, NULL); |
74b2466e LP |
298 | if (r < 0) |
299 | return r; | |
300 | ||
301 | fd = sd_network_monitor_get_fd(m->network_monitor); | |
302 | if (fd < 0) | |
303 | return fd; | |
304 | ||
305 | events = sd_network_monitor_get_events(m->network_monitor); | |
306 | if (events < 0) | |
307 | return events; | |
308 | ||
309 | r = sd_event_add_io(m->event, &m->network_event_source, fd, events, &on_network_event, m); | |
310 | if (r < 0) | |
2d895038 LP |
311 | return r; |
312 | ||
313 | r = sd_event_source_set_priority(m->network_event_source, SD_EVENT_PRIORITY_IMPORTANT+5); | |
314 | if (r < 0) | |
74b2466e LP |
315 | return r; |
316 | ||
aa4a9deb LP |
317 | (void) sd_event_source_set_description(m->network_event_source, "network-monitor"); |
318 | ||
74b2466e LP |
319 | return 0; |
320 | } | |
321 | ||
78c6a153 | 322 | static int determine_hostname(char **llmnr_hostname, char **mdns_hostname) { |
eb60f9cd | 323 | _cleanup_free_ char *h = NULL, *n = NULL; |
78c6a153 LP |
324 | char label[DNS_LABEL_MAX]; |
325 | const char *p; | |
326 | int r, k; | |
eb60f9cd | 327 | |
78c6a153 LP |
328 | assert(llmnr_hostname); |
329 | assert(mdns_hostname); | |
330 | ||
331 | /* Extract and normalize the first label of the locally | |
332 | * configured hostname, and check it's not "localhost". */ | |
eb60f9cd LP |
333 | |
334 | h = gethostname_malloc(); | |
335 | if (!h) | |
336 | return log_oom(); | |
337 | ||
78c6a153 LP |
338 | p = h; |
339 | r = dns_label_unescape(&p, label, sizeof(label)); | |
340 | if (r < 0) | |
341 | return log_error_errno(r, "Failed to unescape host name: %m"); | |
342 | if (r == 0) { | |
343 | log_error("Couldn't find a single label in hosntame."); | |
344 | return -EINVAL; | |
345 | } | |
346 | ||
347 | k = dns_label_undo_idna(label, r, label, sizeof(label)); | |
348 | if (k < 0) | |
349 | return log_error_errno(k, "Failed to undo IDNA: %m"); | |
350 | if (k > 0) | |
351 | r = k; | |
352 | ||
353 | if (!utf8_is_valid(label)) { | |
eb60f9cd LP |
354 | log_error("System hostname is not UTF-8 clean."); |
355 | return -EINVAL; | |
356 | } | |
357 | ||
422baca0 | 358 | r = dns_label_escape_new(label, r, &n); |
78c6a153 LP |
359 | if (r < 0) |
360 | return log_error_errno(r, "Failed to escape host name: %m"); | |
361 | ||
362 | if (is_localhost(n)) { | |
363 | log_debug("System hostname is 'localhost', ignoring."); | |
364 | return -EINVAL; | |
eb60f9cd LP |
365 | } |
366 | ||
78c6a153 LP |
367 | r = dns_name_concat(n, "local", mdns_hostname); |
368 | if (r < 0) | |
369 | return log_error_errno(r, "Failed to determine mDNS hostname: %m"); | |
370 | ||
371 | *llmnr_hostname = n; | |
eb60f9cd LP |
372 | n = NULL; |
373 | ||
374 | return 0; | |
375 | } | |
376 | ||
377 | static int on_hostname_change(sd_event_source *es, int fd, uint32_t revents, void *userdata) { | |
78c6a153 | 378 | _cleanup_free_ char *llmnr_hostname = NULL, *mdns_hostname = NULL; |
eb60f9cd LP |
379 | Manager *m = userdata; |
380 | int r; | |
381 | ||
382 | assert(m); | |
383 | ||
78c6a153 | 384 | r = determine_hostname(&llmnr_hostname, &mdns_hostname); |
eb60f9cd LP |
385 | if (r < 0) |
386 | return 0; /* ignore invalid hostnames */ | |
387 | ||
78c6a153 | 388 | if (streq(llmnr_hostname, m->llmnr_hostname) && streq(mdns_hostname, m->mdns_hostname)) |
eb60f9cd LP |
389 | return 0; |
390 | ||
78c6a153 LP |
391 | log_info("System hostname changed to '%s'.", llmnr_hostname); |
392 | ||
393 | free(m->llmnr_hostname); | |
394 | free(m->mdns_hostname); | |
395 | ||
396 | m->llmnr_hostname = llmnr_hostname; | |
397 | m->mdns_hostname = mdns_hostname; | |
398 | ||
399 | llmnr_hostname = mdns_hostname = NULL; | |
eb60f9cd LP |
400 | |
401 | manager_refresh_rrs(m); | |
402 | ||
403 | return 0; | |
404 | } | |
405 | ||
406 | static int manager_watch_hostname(Manager *m) { | |
eb60f9cd LP |
407 | int r; |
408 | ||
409 | assert(m); | |
410 | ||
411 | m->hostname_fd = open("/proc/sys/kernel/hostname", O_RDONLY|O_CLOEXEC|O_NDELAY|O_NOCTTY); | |
412 | if (m->hostname_fd < 0) { | |
56f64d95 | 413 | log_warning_errno(errno, "Failed to watch hostname: %m"); |
eb60f9cd LP |
414 | return 0; |
415 | } | |
416 | ||
417 | r = sd_event_add_io(m->event, &m->hostname_event_source, m->hostname_fd, 0, on_hostname_change, m); | |
418 | if (r < 0) { | |
419 | if (r == -EPERM) | |
420 | /* kernels prior to 3.2 don't support polling this file. Ignore the failure. */ | |
421 | m->hostname_fd = safe_close(m->hostname_fd); | |
8d3d7072 MS |
422 | else |
423 | return log_error_errno(r, "Failed to add hostname event source: %m"); | |
eb60f9cd LP |
424 | } |
425 | ||
aa4a9deb LP |
426 | (void) sd_event_source_set_description(m->hostname_event_source, "hostname"); |
427 | ||
78c6a153 | 428 | r = determine_hostname(&m->llmnr_hostname, &m->mdns_hostname); |
eb60f9cd LP |
429 | if (r < 0) { |
430 | log_info("Defaulting to hostname 'linux'."); | |
78c6a153 LP |
431 | m->llmnr_hostname = strdup("linux"); |
432 | if (!m->llmnr_hostname) | |
433 | return log_oom(); | |
434 | ||
435 | m->mdns_hostname = strdup("linux.local"); | |
436 | if (!m->mdns_hostname) | |
eb60f9cd LP |
437 | return log_oom(); |
438 | } else | |
78c6a153 | 439 | log_info("Using system hostname '%s'.", m->llmnr_hostname); |
eb60f9cd LP |
440 | |
441 | return 0; | |
442 | } | |
443 | ||
4d506d6b LP |
444 | static int manager_sigusr1(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) { |
445 | _cleanup_free_ char *buffer = NULL; | |
446 | _cleanup_fclose_ FILE *f = NULL; | |
447 | Manager *m = userdata; | |
448 | size_t size = 0; | |
449 | DnsScope *scope; | |
450 | ||
451 | assert(s); | |
452 | assert(si); | |
453 | assert(m); | |
454 | ||
455 | f = open_memstream(&buffer, &size); | |
456 | if (!f) | |
457 | return log_oom(); | |
458 | ||
459 | LIST_FOREACH(scopes, scope, m->dns_scopes) | |
460 | dns_scope_dump(scope, f); | |
461 | ||
462 | if (fflush_and_check(f) < 0) | |
463 | return log_oom(); | |
464 | ||
465 | log_dump(LOG_INFO, buffer); | |
466 | return 0; | |
467 | } | |
468 | ||
bc81447e LP |
469 | static int manager_sigusr2(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) { |
470 | Manager *m = userdata; | |
bc81447e LP |
471 | |
472 | assert(s); | |
473 | assert(si); | |
474 | assert(m); | |
475 | ||
ba35662f | 476 | manager_flush_caches(m); |
ba35662f | 477 | |
bc81447e LP |
478 | return 0; |
479 | } | |
480 | ||
091a364c | 481 | int manager_new(Manager **ret) { |
74b2466e | 482 | _cleanup_(manager_freep) Manager *m = NULL; |
091a364c TG |
483 | int r; |
484 | ||
c92e531c LP |
485 | assert(ret); |
486 | ||
091a364c TG |
487 | m = new0(Manager, 1); |
488 | if (!m) | |
489 | return -ENOMEM; | |
490 | ||
1716f6dc | 491 | m->llmnr_ipv4_udp_fd = m->llmnr_ipv6_udp_fd = -1; |
623a4c97 | 492 | m->llmnr_ipv4_tcp_fd = m->llmnr_ipv6_tcp_fd = -1; |
bc7702b0 | 493 | m->mdns_ipv4_fd = m->mdns_ipv6_fd = -1; |
eb60f9cd | 494 | m->hostname_fd = -1; |
1716f6dc | 495 | |
af49ca27 | 496 | m->llmnr_support = RESOLVE_SUPPORT_YES; |
ad6c0475 | 497 | m->mdns_support = RESOLVE_SUPPORT_NO; |
61ecb465 | 498 | m->dnssec_mode = DEFAULT_DNSSEC_MODE; |
5cb36f41 | 499 | m->read_resolv_conf = true; |
00fa60ae | 500 | m->need_builtin_fallbacks = true; |
dd0bc0f1 | 501 | m->etc_hosts_last = m->etc_hosts_mtime = USEC_INFINITY; |
091a364c | 502 | |
0d2cd476 LP |
503 | r = dns_trust_anchor_load(&m->trust_anchor); |
504 | if (r < 0) | |
505 | return r; | |
506 | ||
ad6c0475 LP |
507 | r = manager_parse_config_file(m); |
508 | if (r < 0) | |
509 | return r; | |
510 | ||
091a364c TG |
511 | r = sd_event_default(&m->event); |
512 | if (r < 0) | |
513 | return r; | |
514 | ||
515 | sd_event_add_signal(m->event, NULL, SIGTERM, NULL, NULL); | |
516 | sd_event_add_signal(m->event, NULL, SIGINT, NULL, NULL); | |
517 | ||
518 | sd_event_set_watchdog(m->event, true); | |
519 | ||
eb60f9cd LP |
520 | r = manager_watch_hostname(m); |
521 | if (r < 0) | |
522 | return r; | |
523 | ||
1716f6dc | 524 | r = dns_scope_new(m, &m->unicast_scope, NULL, DNS_PROTOCOL_DNS, AF_UNSPEC); |
74b2466e LP |
525 | if (r < 0) |
526 | return r; | |
527 | ||
528 | r = manager_network_monitor_listen(m); | |
529 | if (r < 0) | |
530 | return r; | |
531 | ||
532 | r = manager_rtnl_listen(m); | |
533 | if (r < 0) | |
534 | return r; | |
535 | ||
536 | r = manager_connect_bus(m); | |
537 | if (r < 0) | |
538 | return r; | |
539 | ||
4d506d6b | 540 | (void) sd_event_add_signal(m->event, &m->sigusr1_event_source, SIGUSR1, manager_sigusr1, m); |
bc81447e | 541 | (void) sd_event_add_signal(m->event, &m->sigusr2_event_source, SIGUSR2, manager_sigusr2, m); |
4d506d6b | 542 | |
091a364c TG |
543 | *ret = m; |
544 | m = NULL; | |
545 | ||
546 | return 0; | |
547 | } | |
548 | ||
edc501d4 LP |
549 | int manager_start(Manager *m) { |
550 | int r; | |
551 | ||
552 | assert(m); | |
553 | ||
554 | r = manager_llmnr_start(m); | |
555 | if (r < 0) | |
556 | return r; | |
557 | ||
bc7702b0 DM |
558 | r = manager_mdns_start(m); |
559 | if (r < 0) | |
560 | return r; | |
561 | ||
edc501d4 LP |
562 | return 0; |
563 | } | |
564 | ||
74b2466e LP |
565 | Manager *manager_free(Manager *m) { |
566 | Link *l; | |
091a364c TG |
567 | |
568 | if (!m) | |
74b2466e LP |
569 | return NULL; |
570 | ||
4b95f179 LP |
571 | dns_server_unlink_all(m->dns_servers); |
572 | dns_server_unlink_all(m->fallback_dns_servers); | |
a51c1048 LP |
573 | dns_search_domain_unlink_all(m->search_domains); |
574 | ||
74b2466e LP |
575 | while ((l = hashmap_first(m->links))) |
576 | link_free(l); | |
f0e15467 LP |
577 | |
578 | while (m->dns_queries) | |
579 | dns_query_free(m->dns_queries); | |
74b2466e | 580 | |
cab5b059 LP |
581 | dns_scope_free(m->unicast_scope); |
582 | ||
f0e15467 LP |
583 | hashmap_free(m->links); |
584 | hashmap_free(m->dns_transactions); | |
585 | ||
096b6773 LP |
586 | sd_event_source_unref(m->network_event_source); |
587 | sd_network_monitor_unref(m->network_monitor); | |
091a364c | 588 | |
a564ca2f LP |
589 | sd_netlink_unref(m->rtnl); |
590 | sd_event_source_unref(m->rtnl_event_source); | |
591 | ||
edc501d4 | 592 | manager_llmnr_stop(m); |
bc7702b0 | 593 | manager_mdns_stop(m); |
623a4c97 | 594 | |
902bb5d8 | 595 | sd_bus_slot_unref(m->prepare_for_sleep_slot); |
74b2466e LP |
596 | sd_event_source_unref(m->bus_retry_event_source); |
597 | sd_bus_unref(m->bus); | |
091a364c | 598 | |
4d506d6b | 599 | sd_event_source_unref(m->sigusr1_event_source); |
bc81447e | 600 | sd_event_source_unref(m->sigusr2_event_source); |
4d506d6b | 601 | |
74b2466e | 602 | sd_event_unref(m->event); |
623a4c97 | 603 | |
78c6a153 LP |
604 | dns_resource_key_unref(m->llmnr_host_ipv4_key); |
605 | dns_resource_key_unref(m->llmnr_host_ipv6_key); | |
eb60f9cd | 606 | |
eb60f9cd | 607 | sd_event_source_unref(m->hostname_event_source); |
d9fcf2ba | 608 | safe_close(m->hostname_fd); |
78c6a153 LP |
609 | free(m->llmnr_hostname); |
610 | free(m->mdns_hostname); | |
eb60f9cd | 611 | |
0d2cd476 | 612 | dns_trust_anchor_flush(&m->trust_anchor); |
dd0bc0f1 | 613 | manager_etc_hosts_flush(m); |
0d2cd476 | 614 | |
091a364c | 615 | free(m); |
74b2466e LP |
616 | |
617 | return NULL; | |
091a364c TG |
618 | } |
619 | ||
1716f6dc | 620 | int manager_recv(Manager *m, int fd, DnsProtocol protocol, DnsPacket **ret) { |
74b2466e | 621 | _cleanup_(dns_packet_unrefp) DnsPacket *p = NULL; |
1716f6dc LP |
622 | union { |
623 | struct cmsghdr header; /* For alignment */ | |
40a1eebd | 624 | uint8_t buffer[CMSG_SPACE(MAXSIZE(struct in_pktinfo, struct in6_pktinfo)) |
1716f6dc | 625 | + CMSG_SPACE(int) /* ttl/hoplimit */ |
623a4c97 | 626 | + EXTRA_CMSG_SPACE /* kernel appears to require extra buffer space */]; |
1716f6dc LP |
627 | } control; |
628 | union sockaddr_union sa; | |
74b2466e | 629 | struct msghdr mh = {}; |
1716f6dc | 630 | struct cmsghdr *cmsg; |
74b2466e | 631 | struct iovec iov; |
4edc2c9b LP |
632 | ssize_t ms, l; |
633 | int r; | |
74b2466e LP |
634 | |
635 | assert(m); | |
1716f6dc | 636 | assert(fd >= 0); |
74b2466e LP |
637 | assert(ret); |
638 | ||
4edc2c9b | 639 | ms = next_datagram_size_fd(fd); |
74b2466e | 640 | if (ms < 0) |
4edc2c9b | 641 | return ms; |
74b2466e | 642 | |
1716f6dc | 643 | r = dns_packet_new(&p, protocol, ms); |
74b2466e LP |
644 | if (r < 0) |
645 | return r; | |
646 | ||
647 | iov.iov_base = DNS_PACKET_DATA(p); | |
648 | iov.iov_len = p->allocated; | |
649 | ||
1716f6dc LP |
650 | mh.msg_name = &sa.sa; |
651 | mh.msg_namelen = sizeof(sa); | |
74b2466e LP |
652 | mh.msg_iov = &iov; |
653 | mh.msg_iovlen = 1; | |
1716f6dc LP |
654 | mh.msg_control = &control; |
655 | mh.msg_controllen = sizeof(control); | |
74b2466e | 656 | |
a38d9945 | 657 | l = recvmsg(fd, &mh, 0); |
f134289a EV |
658 | if (l == 0) |
659 | return 0; | |
74b2466e | 660 | if (l < 0) { |
ad867662 | 661 | if (errno == EAGAIN || errno == EINTR) |
74b2466e LP |
662 | return 0; |
663 | ||
664 | return -errno; | |
091a364c TG |
665 | } |
666 | ||
1716f6dc LP |
667 | assert(!(mh.msg_flags & MSG_CTRUNC)); |
668 | assert(!(mh.msg_flags & MSG_TRUNC)); | |
669 | ||
74b2466e | 670 | p->size = (size_t) l; |
091a364c | 671 | |
1716f6dc | 672 | p->family = sa.sa.sa_family; |
623a4c97 LP |
673 | p->ipproto = IPPROTO_UDP; |
674 | if (p->family == AF_INET) { | |
1716f6dc | 675 | p->sender.in = sa.in.sin_addr; |
623a4c97 LP |
676 | p->sender_port = be16toh(sa.in.sin_port); |
677 | } else if (p->family == AF_INET6) { | |
1716f6dc | 678 | p->sender.in6 = sa.in6.sin6_addr; |
623a4c97 LP |
679 | p->sender_port = be16toh(sa.in6.sin6_port); |
680 | p->ifindex = sa.in6.sin6_scope_id; | |
681 | } else | |
1716f6dc | 682 | return -EAFNOSUPPORT; |
74b2466e | 683 | |
2a1288ff | 684 | CMSG_FOREACH(cmsg, &mh) { |
74b2466e | 685 | |
1716f6dc LP |
686 | if (cmsg->cmsg_level == IPPROTO_IPV6) { |
687 | assert(p->family == AF_INET6); | |
74b2466e | 688 | |
1716f6dc | 689 | switch (cmsg->cmsg_type) { |
74b2466e | 690 | |
1716f6dc LP |
691 | case IPV6_PKTINFO: { |
692 | struct in6_pktinfo *i = (struct in6_pktinfo*) CMSG_DATA(cmsg); | |
74b2466e | 693 | |
623a4c97 LP |
694 | if (p->ifindex <= 0) |
695 | p->ifindex = i->ipi6_ifindex; | |
696 | ||
1716f6dc LP |
697 | p->destination.in6 = i->ipi6_addr; |
698 | break; | |
699 | } | |
74b2466e | 700 | |
1716f6dc LP |
701 | case IPV6_HOPLIMIT: |
702 | p->ttl = *(int *) CMSG_DATA(cmsg); | |
703 | break; | |
74b2466e | 704 | |
1716f6dc LP |
705 | } |
706 | } else if (cmsg->cmsg_level == IPPROTO_IP) { | |
707 | assert(p->family == AF_INET); | |
74b2466e | 708 | |
1716f6dc | 709 | switch (cmsg->cmsg_type) { |
74b2466e | 710 | |
1716f6dc LP |
711 | case IP_PKTINFO: { |
712 | struct in_pktinfo *i = (struct in_pktinfo*) CMSG_DATA(cmsg); | |
091a364c | 713 | |
623a4c97 LP |
714 | if (p->ifindex <= 0) |
715 | p->ifindex = i->ipi_ifindex; | |
716 | ||
1716f6dc LP |
717 | p->destination.in = i->ipi_addr; |
718 | break; | |
719 | } | |
74b2466e | 720 | |
623a4c97 | 721 | case IP_TTL: |
1716f6dc LP |
722 | p->ttl = *(int *) CMSG_DATA(cmsg); |
723 | break; | |
724 | } | |
725 | } | |
726 | } | |
74b2466e | 727 | |
623a4c97 LP |
728 | /* The Linux kernel sets the interface index to the loopback |
729 | * device if the packet came from the local host since it | |
730 | * avoids the routing table in such a case. Let's unset the | |
731 | * interface index in such a case. */ | |
a5f03596 | 732 | if (p->ifindex == LOOPBACK_IFINDEX) |
623a4c97 LP |
733 | p->ifindex = 0; |
734 | ||
86ad4cd7 TG |
735 | if (protocol != DNS_PROTOCOL_DNS) { |
736 | /* If we don't know the interface index still, we look for the | |
737 | * first local interface with a matching address. Yuck! */ | |
738 | if (p->ifindex <= 0) | |
739 | p->ifindex = manager_find_ifindex(m, p->family, &p->destination); | |
740 | } | |
623a4c97 | 741 | |
74b2466e LP |
742 | *ret = p; |
743 | p = NULL; | |
744 | ||
745 | return 1; | |
746 | } | |
747 | ||
74b2466e LP |
748 | static int sendmsg_loop(int fd, struct msghdr *mh, int flags) { |
749 | int r; | |
750 | ||
751 | assert(fd >= 0); | |
752 | assert(mh); | |
753 | ||
754 | for (;;) { | |
755 | if (sendmsg(fd, mh, flags) >= 0) | |
756 | return 0; | |
757 | ||
758 | if (errno == EINTR) | |
759 | continue; | |
760 | ||
761 | if (errno != EAGAIN) | |
762 | return -errno; | |
763 | ||
764 | r = fd_wait_for_event(fd, POLLOUT, SEND_TIMEOUT_USEC); | |
765 | if (r < 0) | |
766 | return r; | |
767 | if (r == 0) | |
768 | return -ETIMEDOUT; | |
769 | } | |
770 | } | |
771 | ||
72290734 TG |
772 | static int write_loop(int fd, void *message, size_t length) { |
773 | int r; | |
774 | ||
775 | assert(fd >= 0); | |
776 | assert(message); | |
777 | ||
778 | for (;;) { | |
779 | if (write(fd, message, length) >= 0) | |
780 | return 0; | |
781 | ||
782 | if (errno == EINTR) | |
783 | continue; | |
784 | ||
785 | if (errno != EAGAIN) | |
786 | return -errno; | |
787 | ||
788 | r = fd_wait_for_event(fd, POLLOUT, SEND_TIMEOUT_USEC); | |
789 | if (r < 0) | |
790 | return r; | |
791 | if (r == 0) | |
792 | return -ETIMEDOUT; | |
793 | } | |
794 | } | |
795 | ||
796 | int manager_write(Manager *m, int fd, DnsPacket *p) { | |
797 | int r; | |
798 | ||
deb3f3d3 | 799 | log_debug("Sending %s packet with id %" PRIu16 ".", DNS_PACKET_QR(p) ? "response" : "query", DNS_PACKET_ID(p)); |
72290734 TG |
800 | |
801 | r = write_loop(fd, DNS_PACKET_DATA(p), p->size); | |
802 | if (r < 0) | |
803 | return r; | |
804 | ||
805 | return 0; | |
806 | } | |
807 | ||
623a4c97 | 808 | static int manager_ipv4_send(Manager *m, int fd, int ifindex, const struct in_addr *addr, uint16_t port, DnsPacket *p) { |
74b2466e LP |
809 | union sockaddr_union sa = { |
810 | .in.sin_family = AF_INET, | |
74b2466e | 811 | }; |
1716f6dc LP |
812 | union { |
813 | struct cmsghdr header; /* For alignment */ | |
814 | uint8_t buffer[CMSG_SPACE(sizeof(struct in_pktinfo))]; | |
815 | } control; | |
74b2466e LP |
816 | struct msghdr mh = {}; |
817 | struct iovec iov; | |
74b2466e LP |
818 | |
819 | assert(m); | |
1716f6dc LP |
820 | assert(fd >= 0); |
821 | assert(addr); | |
822 | assert(port > 0); | |
74b2466e LP |
823 | assert(p); |
824 | ||
74b2466e LP |
825 | iov.iov_base = DNS_PACKET_DATA(p); |
826 | iov.iov_len = p->size; | |
091a364c | 827 | |
1716f6dc LP |
828 | sa.in.sin_addr = *addr; |
829 | sa.in.sin_port = htobe16(port), | |
091a364c | 830 | |
74b2466e LP |
831 | mh.msg_iov = &iov; |
832 | mh.msg_iovlen = 1; | |
833 | mh.msg_name = &sa.sa; | |
834 | mh.msg_namelen = sizeof(sa.in); | |
091a364c | 835 | |
74b2466e LP |
836 | if (ifindex > 0) { |
837 | struct cmsghdr *cmsg; | |
838 | struct in_pktinfo *pi; | |
839 | ||
840 | zero(control); | |
841 | ||
1716f6dc | 842 | mh.msg_control = &control; |
74b2466e LP |
843 | mh.msg_controllen = CMSG_LEN(sizeof(struct in_pktinfo)); |
844 | ||
845 | cmsg = CMSG_FIRSTHDR(&mh); | |
846 | cmsg->cmsg_len = mh.msg_controllen; | |
847 | cmsg->cmsg_level = IPPROTO_IP; | |
848 | cmsg->cmsg_type = IP_PKTINFO; | |
849 | ||
850 | pi = (struct in_pktinfo*) CMSG_DATA(cmsg); | |
851 | pi->ipi_ifindex = ifindex; | |
852 | } | |
853 | ||
854 | return sendmsg_loop(fd, &mh, 0); | |
855 | } | |
856 | ||
623a4c97 | 857 | static int manager_ipv6_send(Manager *m, int fd, int ifindex, const struct in6_addr *addr, uint16_t port, DnsPacket *p) { |
74b2466e LP |
858 | union sockaddr_union sa = { |
859 | .in6.sin6_family = AF_INET6, | |
74b2466e | 860 | }; |
1716f6dc LP |
861 | union { |
862 | struct cmsghdr header; /* For alignment */ | |
863 | uint8_t buffer[CMSG_SPACE(sizeof(struct in6_pktinfo))]; | |
864 | } control; | |
74b2466e LP |
865 | struct msghdr mh = {}; |
866 | struct iovec iov; | |
74b2466e LP |
867 | |
868 | assert(m); | |
1716f6dc LP |
869 | assert(fd >= 0); |
870 | assert(addr); | |
871 | assert(port > 0); | |
74b2466e LP |
872 | assert(p); |
873 | ||
74b2466e LP |
874 | iov.iov_base = DNS_PACKET_DATA(p); |
875 | iov.iov_len = p->size; | |
876 | ||
1716f6dc LP |
877 | sa.in6.sin6_addr = *addr; |
878 | sa.in6.sin6_port = htobe16(port), | |
74b2466e LP |
879 | sa.in6.sin6_scope_id = ifindex; |
880 | ||
881 | mh.msg_iov = &iov; | |
882 | mh.msg_iovlen = 1; | |
883 | mh.msg_name = &sa.sa; | |
884 | mh.msg_namelen = sizeof(sa.in6); | |
885 | ||
886 | if (ifindex > 0) { | |
887 | struct cmsghdr *cmsg; | |
888 | struct in6_pktinfo *pi; | |
889 | ||
890 | zero(control); | |
891 | ||
1716f6dc | 892 | mh.msg_control = &control; |
74b2466e LP |
893 | mh.msg_controllen = CMSG_LEN(sizeof(struct in6_pktinfo)); |
894 | ||
895 | cmsg = CMSG_FIRSTHDR(&mh); | |
896 | cmsg->cmsg_len = mh.msg_controllen; | |
897 | cmsg->cmsg_level = IPPROTO_IPV6; | |
898 | cmsg->cmsg_type = IPV6_PKTINFO; | |
899 | ||
900 | pi = (struct in6_pktinfo*) CMSG_DATA(cmsg); | |
901 | pi->ipi6_ifindex = ifindex; | |
902 | } | |
903 | ||
904 | return sendmsg_loop(fd, &mh, 0); | |
905 | } | |
906 | ||
623a4c97 | 907 | int manager_send(Manager *m, int fd, int ifindex, int family, const union in_addr_union *addr, uint16_t port, DnsPacket *p) { |
1716f6dc LP |
908 | assert(m); |
909 | assert(fd >= 0); | |
910 | assert(addr); | |
911 | assert(port > 0); | |
912 | assert(p); | |
913 | ||
deb3f3d3 | 914 | 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 | 915 | |
1716f6dc LP |
916 | if (family == AF_INET) |
917 | return manager_ipv4_send(m, fd, ifindex, &addr->in, port, p); | |
2817157b | 918 | if (family == AF_INET6) |
1716f6dc LP |
919 | return manager_ipv6_send(m, fd, ifindex, &addr->in6, port, p); |
920 | ||
921 | return -EAFNOSUPPORT; | |
922 | } | |
923 | ||
e1c95994 LP |
924 | uint32_t manager_find_mtu(Manager *m) { |
925 | uint32_t mtu = 0; | |
926 | Link *l; | |
927 | Iterator i; | |
928 | ||
929 | /* If we don't know on which link a DNS packet would be | |
930 | * delivered, let's find the largest MTU that works on all | |
931 | * interfaces we know of */ | |
932 | ||
933 | HASHMAP_FOREACH(l, m->links, i) { | |
934 | if (l->mtu <= 0) | |
935 | continue; | |
936 | ||
937 | if (mtu <= 0 || l->mtu < mtu) | |
938 | mtu = l->mtu; | |
939 | } | |
940 | ||
941 | return mtu; | |
942 | } | |
1716f6dc | 943 | |
623a4c97 | 944 | int manager_find_ifindex(Manager *m, int family, const union in_addr_union *in_addr) { |
ec2c5e43 LP |
945 | LinkAddress *a; |
946 | ||
947 | assert(m); | |
948 | ||
4e945a6f | 949 | a = manager_find_link_address(m, family, in_addr); |
ec2c5e43 LP |
950 | if (a) |
951 | return a->link->ifindex; | |
952 | ||
953 | return 0; | |
954 | } | |
955 | ||
eb60f9cd LP |
956 | void manager_refresh_rrs(Manager *m) { |
957 | Iterator i; | |
958 | Link *l; | |
959 | ||
960 | assert(m); | |
961 | ||
78c6a153 LP |
962 | m->llmnr_host_ipv4_key = dns_resource_key_unref(m->llmnr_host_ipv4_key); |
963 | m->llmnr_host_ipv6_key = dns_resource_key_unref(m->llmnr_host_ipv6_key); | |
eb60f9cd LP |
964 | |
965 | HASHMAP_FOREACH(l, m->links, i) { | |
966 | link_add_rrs(l, true); | |
967 | link_add_rrs(l, false); | |
968 | } | |
969 | } | |
970 | ||
ec2c5e43 LP |
971 | int manager_next_hostname(Manager *m) { |
972 | const char *p; | |
556a2294 | 973 | uint64_t u, a; |
78c6a153 LP |
974 | char *h, *k; |
975 | int r; | |
623a4c97 LP |
976 | |
977 | assert(m); | |
978 | ||
78c6a153 | 979 | p = strchr(m->llmnr_hostname, 0); |
ec2c5e43 LP |
980 | assert(p); |
981 | ||
78c6a153 | 982 | while (p > m->llmnr_hostname) { |
ec2c5e43 LP |
983 | if (!strchr("0123456789", p[-1])) |
984 | break; | |
985 | ||
986 | p--; | |
987 | } | |
988 | ||
989 | if (*p == 0 || safe_atou64(p, &u) < 0 || u <= 0) | |
990 | u = 1; | |
991 | ||
556a2294 LP |
992 | /* Add a random number to the old value. This way we can avoid |
993 | * that two hosts pick the same hostname, win on IPv4 and lose | |
994 | * on IPv6 (or vice versa), and pick the same hostname | |
995 | * replacement hostname, ad infinitum. We still want the | |
996 | * numbers to go up monotonically, hence we just add a random | |
997 | * value 1..10 */ | |
998 | ||
999 | random_bytes(&a, sizeof(a)); | |
1000 | u += 1 + a % 10; | |
ec2c5e43 | 1001 | |
78c6a153 | 1002 | if (asprintf(&h, "%.*s%" PRIu64, (int) (p - m->llmnr_hostname), m->llmnr_hostname, u) < 0) |
ec2c5e43 LP |
1003 | return -ENOMEM; |
1004 | ||
78c6a153 LP |
1005 | r = dns_name_concat(h, "local", &k); |
1006 | if (r < 0) { | |
1007 | free(h); | |
1008 | return r; | |
1009 | } | |
1010 | ||
1011 | log_info("Hostname conflict, changing published hostname from '%s' to '%s'.", m->llmnr_hostname, h); | |
1012 | ||
1013 | free(m->llmnr_hostname); | |
1014 | m->llmnr_hostname = h; | |
ec2c5e43 | 1015 | |
78c6a153 LP |
1016 | free(m->mdns_hostname); |
1017 | m->mdns_hostname = k; | |
ec2c5e43 | 1018 | |
eb60f9cd | 1019 | manager_refresh_rrs(m); |
623a4c97 LP |
1020 | |
1021 | return 0; | |
1022 | } | |
ec2c5e43 | 1023 | |
4e945a6f | 1024 | LinkAddress* manager_find_link_address(Manager *m, int family, const union in_addr_union *in_addr) { |
ec2c5e43 LP |
1025 | Iterator i; |
1026 | Link *l; | |
1027 | ||
1028 | assert(m); | |
1029 | ||
1030 | HASHMAP_FOREACH(l, m->links, i) { | |
1031 | LinkAddress *a; | |
1032 | ||
1033 | a = link_find_address(l, family, in_addr); | |
1034 | if (a) | |
1035 | return a; | |
1036 | } | |
1037 | ||
1038 | return NULL; | |
1039 | } | |
1040 | ||
a4076574 | 1041 | bool manager_our_packet(Manager *m, DnsPacket *p) { |
ec2c5e43 LP |
1042 | assert(m); |
1043 | assert(p); | |
1044 | ||
4e945a6f | 1045 | return !!manager_find_link_address(m, p->family, &p->sender); |
ec2c5e43 | 1046 | } |
4e945a6f | 1047 | |
a4076574 LP |
1048 | DnsScope* manager_find_scope(Manager *m, DnsPacket *p) { |
1049 | Link *l; | |
1050 | ||
1051 | assert(m); | |
1052 | assert(p); | |
1053 | ||
1054 | l = hashmap_get(m->links, INT_TO_PTR(p->ifindex)); | |
1055 | if (!l) | |
1056 | return NULL; | |
1057 | ||
b4f1862d DM |
1058 | switch (p->protocol) { |
1059 | case DNS_PROTOCOL_LLMNR: | |
a4076574 LP |
1060 | if (p->family == AF_INET) |
1061 | return l->llmnr_ipv4_scope; | |
1062 | else if (p->family == AF_INET6) | |
1063 | return l->llmnr_ipv6_scope; | |
b4f1862d DM |
1064 | |
1065 | break; | |
1066 | ||
1067 | case DNS_PROTOCOL_MDNS: | |
1068 | if (p->family == AF_INET) | |
1069 | return l->mdns_ipv4_scope; | |
1070 | else if (p->family == AF_INET6) | |
1071 | return l->mdns_ipv6_scope; | |
1072 | ||
1073 | break; | |
1074 | ||
1075 | default: | |
1076 | break; | |
a4076574 LP |
1077 | } |
1078 | ||
1079 | return NULL; | |
1080 | } | |
1081 | ||
902bb5d8 LP |
1082 | void manager_verify_all(Manager *m) { |
1083 | DnsScope *s; | |
1084 | ||
1085 | assert(m); | |
1086 | ||
1087 | LIST_FOREACH(scopes, s, m->dns_scopes) | |
1088 | dns_zone_verify_all(&s->zone); | |
1089 | } | |
1090 | ||
78c6a153 | 1091 | int manager_is_own_hostname(Manager *m, const char *name) { |
78c6a153 LP |
1092 | int r; |
1093 | ||
1094 | assert(m); | |
1095 | assert(name); | |
1096 | ||
1097 | if (m->llmnr_hostname) { | |
1098 | r = dns_name_equal(name, m->llmnr_hostname); | |
1099 | if (r != 0) | |
1100 | return r; | |
1101 | } | |
1102 | ||
1103 | if (m->mdns_hostname) | |
1104 | return dns_name_equal(name, m->mdns_hostname); | |
1105 | ||
1106 | return 0; | |
1107 | } | |
1108 | ||
9176a57c LP |
1109 | int manager_compile_dns_servers(Manager *m, OrderedSet **dns) { |
1110 | DnsServer *s; | |
1111 | Iterator i; | |
1112 | Link *l; | |
1113 | int r; | |
1114 | ||
1115 | assert(m); | |
1116 | assert(dns); | |
1117 | ||
1118 | r = ordered_set_ensure_allocated(dns, &dns_server_hash_ops); | |
1119 | if (r < 0) | |
1120 | return r; | |
1121 | ||
1122 | /* First add the system-wide servers and domains */ | |
1123 | LIST_FOREACH(servers, s, m->dns_servers) { | |
1124 | r = ordered_set_put(*dns, s); | |
1125 | if (r == -EEXIST) | |
1126 | continue; | |
1127 | if (r < 0) | |
1128 | return r; | |
1129 | } | |
1130 | ||
1131 | /* Then, add the per-link servers */ | |
1132 | HASHMAP_FOREACH(l, m->links, i) { | |
1133 | LIST_FOREACH(servers, s, l->dns_servers) { | |
1134 | r = ordered_set_put(*dns, s); | |
1135 | if (r == -EEXIST) | |
1136 | continue; | |
1137 | if (r < 0) | |
1138 | return r; | |
1139 | } | |
1140 | } | |
1141 | ||
1142 | /* If we found nothing, add the fallback servers */ | |
1143 | if (ordered_set_isempty(*dns)) { | |
1144 | LIST_FOREACH(servers, s, m->fallback_dns_servers) { | |
1145 | r = ordered_set_put(*dns, s); | |
1146 | if (r == -EEXIST) | |
1147 | continue; | |
1148 | if (r < 0) | |
1149 | return r; | |
1150 | } | |
1151 | } | |
1152 | ||
1153 | return 0; | |
1154 | } | |
1155 | ||
6f7da49d | 1156 | int manager_compile_search_domains(Manager *m, OrderedSet **domains, int filter_route) { |
9176a57c LP |
1157 | DnsSearchDomain *d; |
1158 | Iterator i; | |
1159 | Link *l; | |
1160 | int r; | |
1161 | ||
1162 | assert(m); | |
1163 | assert(domains); | |
1164 | ||
1165 | r = ordered_set_ensure_allocated(domains, &dns_name_hash_ops); | |
1166 | if (r < 0) | |
1167 | return r; | |
1168 | ||
1169 | LIST_FOREACH(domains, d, m->search_domains) { | |
6f7da49d LP |
1170 | |
1171 | if (filter_route >= 0 && | |
1172 | d->route_only != !!filter_route) | |
1173 | continue; | |
1174 | ||
9176a57c LP |
1175 | r = ordered_set_put(*domains, d->name); |
1176 | if (r == -EEXIST) | |
1177 | continue; | |
1178 | if (r < 0) | |
1179 | return r; | |
1180 | } | |
1181 | ||
1182 | HASHMAP_FOREACH(l, m->links, i) { | |
1183 | ||
1184 | LIST_FOREACH(domains, d, l->search_domains) { | |
6f7da49d LP |
1185 | |
1186 | if (filter_route >= 0 && | |
1187 | d->route_only != !!filter_route) | |
1188 | continue; | |
1189 | ||
9176a57c LP |
1190 | r = ordered_set_put(*domains, d->name); |
1191 | if (r == -EEXIST) | |
1192 | continue; | |
1193 | if (r < 0) | |
1194 | return r; | |
1195 | } | |
1196 | } | |
1197 | ||
1198 | return 0; | |
1199 | } | |
c69fa7e3 LP |
1200 | |
1201 | DnssecMode manager_get_dnssec_mode(Manager *m) { | |
1202 | assert(m); | |
1203 | ||
1204 | if (m->dnssec_mode != _DNSSEC_MODE_INVALID) | |
1205 | return m->dnssec_mode; | |
1206 | ||
1207 | return DNSSEC_NO; | |
1208 | } | |
1209 | ||
1210 | bool manager_dnssec_supported(Manager *m) { | |
1211 | DnsServer *server; | |
1212 | Iterator i; | |
1213 | Link *l; | |
1214 | ||
1215 | assert(m); | |
1216 | ||
1217 | if (manager_get_dnssec_mode(m) == DNSSEC_NO) | |
1218 | return false; | |
1219 | ||
1220 | server = manager_get_dns_server(m); | |
1221 | if (server && !dns_server_dnssec_supported(server)) | |
1222 | return false; | |
1223 | ||
1224 | HASHMAP_FOREACH(l, m->links, i) | |
1225 | if (!link_dnssec_supported(l)) | |
1226 | return false; | |
1227 | ||
1228 | return true; | |
1229 | } | |
59c5b597 LP |
1230 | |
1231 | void manager_dnssec_verdict(Manager *m, DnssecVerdict verdict, const DnsResourceKey *key) { | |
1232 | ||
1233 | assert(verdict >= 0); | |
1234 | assert(verdict < _DNSSEC_VERDICT_MAX); | |
1235 | ||
1236 | if (log_get_max_level() >= LOG_DEBUG) { | |
202b76ae | 1237 | char s[DNS_RESOURCE_KEY_STRING_MAX]; |
59c5b597 | 1238 | |
202b76ae ZJS |
1239 | log_debug("Found verdict for lookup %s: %s", |
1240 | dns_resource_key_to_string(key, s, sizeof s), | |
1241 | dnssec_verdict_to_string(verdict)); | |
59c5b597 LP |
1242 | } |
1243 | ||
1244 | m->n_dnssec_verdict[verdict]++; | |
1245 | } | |
011696f7 LP |
1246 | |
1247 | bool manager_routable(Manager *m, int family) { | |
1248 | Iterator i; | |
1249 | Link *l; | |
1250 | ||
1251 | assert(m); | |
1252 | ||
1253 | /* Returns true if the host has at least one interface with a routable address of the specified type */ | |
1254 | ||
1255 | HASHMAP_FOREACH(l, m->links, i) | |
1256 | if (link_relevant(l, family, false)) | |
1257 | return true; | |
1258 | ||
1259 | return false; | |
1260 | } | |
ba35662f LP |
1261 | |
1262 | void manager_flush_caches(Manager *m) { | |
1263 | DnsScope *scope; | |
1264 | ||
1265 | assert(m); | |
1266 | ||
1267 | LIST_FOREACH(scopes, scope, m->dns_scopes) | |
1268 | dns_cache_flush(&scope->cache); | |
aac57b35 ZJS |
1269 | |
1270 | log_info("Flushed all caches."); | |
ba35662f | 1271 | } |