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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" |
dd0bc0f1 | 40 | #include "resolved-etc-hosts.h" |
5f402ae8 | 41 | #include "resolved-llmnr.h" |
07630cea | 42 | #include "resolved-manager.h" |
bc7702b0 | 43 | #include "resolved-mdns.h" |
dd0bc0f1 | 44 | #include "resolved-resolv-conf.h" |
07630cea | 45 | #include "socket-util.h" |
8b43440b | 46 | #include "string-table.h" |
07630cea LP |
47 | #include "string-util.h" |
48 | #include "utf8.h" | |
74b2466e LP |
49 | |
50 | #define SEND_TIMEOUT_USEC (200 * USEC_PER_MSEC) | |
51 | ||
1c4baffc | 52 | static int manager_process_link(sd_netlink *rtnl, sd_netlink_message *mm, void *userdata) { |
74b2466e LP |
53 | Manager *m = userdata; |
54 | uint16_t type; | |
55 | Link *l; | |
56 | int ifindex, r; | |
57 | ||
58 | assert(rtnl); | |
59 | assert(m); | |
60 | assert(mm); | |
61 | ||
1c4baffc | 62 | r = sd_netlink_message_get_type(mm, &type); |
74b2466e LP |
63 | if (r < 0) |
64 | goto fail; | |
65 | ||
66 | r = sd_rtnl_message_link_get_ifindex(mm, &ifindex); | |
67 | if (r < 0) | |
68 | goto fail; | |
69 | ||
70 | l = hashmap_get(m->links, INT_TO_PTR(ifindex)); | |
71 | ||
72 | switch (type) { | |
73 | ||
a2a416f7 LP |
74 | case RTM_NEWLINK:{ |
75 | bool is_new = !l; | |
74b2466e | 76 | |
a2a416f7 | 77 | if (!l) { |
74b2466e LP |
78 | r = link_new(m, &l, ifindex); |
79 | if (r < 0) | |
80 | goto fail; | |
81 | } | |
82 | ||
83 | r = link_update_rtnl(l, mm); | |
84 | if (r < 0) | |
85 | goto fail; | |
86 | ||
21d73c87 LP |
87 | r = link_update_monitor(l); |
88 | if (r < 0) | |
89 | goto fail; | |
90 | ||
a2a416f7 LP |
91 | if (is_new) |
92 | log_debug("Found new link %i/%s", ifindex, l->name); | |
93 | ||
74b2466e | 94 | break; |
a2a416f7 | 95 | } |
74b2466e LP |
96 | |
97 | case RTM_DELLINK: | |
98 | if (l) { | |
a2a416f7 | 99 | log_debug("Removing link %i/%s", l->ifindex, l->name); |
74b2466e LP |
100 | link_free(l); |
101 | } | |
102 | ||
103 | break; | |
104 | } | |
105 | ||
106 | return 0; | |
107 | ||
108 | fail: | |
da927ba9 | 109 | log_warning_errno(r, "Failed to process RTNL link message: %m"); |
74b2466e LP |
110 | return 0; |
111 | } | |
112 | ||
1c4baffc | 113 | static int manager_process_address(sd_netlink *rtnl, sd_netlink_message *mm, void *userdata) { |
74b2466e LP |
114 | Manager *m = userdata; |
115 | union in_addr_union address; | |
74b2466e | 116 | uint16_t type; |
0dd25fb9 | 117 | int r, ifindex, family; |
74b2466e LP |
118 | LinkAddress *a; |
119 | Link *l; | |
120 | ||
121 | assert(rtnl); | |
122 | assert(mm); | |
123 | assert(m); | |
124 | ||
1c4baffc | 125 | r = sd_netlink_message_get_type(mm, &type); |
74b2466e LP |
126 | if (r < 0) |
127 | goto fail; | |
128 | ||
129 | r = sd_rtnl_message_addr_get_ifindex(mm, &ifindex); | |
130 | if (r < 0) | |
131 | goto fail; | |
132 | ||
133 | l = hashmap_get(m->links, INT_TO_PTR(ifindex)); | |
134 | if (!l) | |
135 | return 0; | |
136 | ||
137 | r = sd_rtnl_message_addr_get_family(mm, &family); | |
138 | if (r < 0) | |
139 | goto fail; | |
140 | ||
141 | switch (family) { | |
142 | ||
143 | case AF_INET: | |
1c4baffc | 144 | r = sd_netlink_message_read_in_addr(mm, IFA_LOCAL, &address.in); |
74b2466e | 145 | if (r < 0) { |
1c4baffc | 146 | r = sd_netlink_message_read_in_addr(mm, IFA_ADDRESS, &address.in); |
74b2466e LP |
147 | if (r < 0) |
148 | goto fail; | |
149 | } | |
150 | ||
151 | break; | |
152 | ||
153 | case AF_INET6: | |
1c4baffc | 154 | r = sd_netlink_message_read_in6_addr(mm, IFA_LOCAL, &address.in6); |
74b2466e | 155 | if (r < 0) { |
1c4baffc | 156 | r = sd_netlink_message_read_in6_addr(mm, IFA_ADDRESS, &address.in6); |
74b2466e LP |
157 | if (r < 0) |
158 | goto fail; | |
159 | } | |
160 | ||
161 | break; | |
162 | ||
163 | default: | |
164 | return 0; | |
165 | } | |
166 | ||
167 | a = link_find_address(l, family, &address); | |
168 | ||
169 | switch (type) { | |
170 | ||
171 | case RTM_NEWADDR: | |
172 | ||
173 | if (!a) { | |
174 | r = link_address_new(l, &a, family, &address); | |
175 | if (r < 0) | |
176 | return r; | |
177 | } | |
178 | ||
179 | r = link_address_update_rtnl(a, mm); | |
180 | if (r < 0) | |
181 | return r; | |
182 | ||
183 | break; | |
184 | ||
185 | case RTM_DELADDR: | |
3e044c49 | 186 | link_address_free(a); |
74b2466e LP |
187 | break; |
188 | } | |
189 | ||
190 | return 0; | |
191 | ||
192 | fail: | |
da927ba9 | 193 | log_warning_errno(r, "Failed to process RTNL address message: %m"); |
74b2466e LP |
194 | return 0; |
195 | } | |
196 | ||
74b2466e | 197 | static int manager_rtnl_listen(Manager *m) { |
4afd3348 | 198 | _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL; |
1c4baffc | 199 | sd_netlink_message *i; |
74b2466e LP |
200 | int r; |
201 | ||
202 | assert(m); | |
203 | ||
cc98b302 | 204 | /* First, subscribe to interfaces coming and going */ |
1c4baffc | 205 | r = sd_netlink_open(&m->rtnl); |
74b2466e LP |
206 | if (r < 0) |
207 | return r; | |
208 | ||
1c4baffc | 209 | r = sd_netlink_attach_event(m->rtnl, m->event, 0); |
74b2466e LP |
210 | if (r < 0) |
211 | return r; | |
212 | ||
1c4baffc | 213 | r = sd_netlink_add_match(m->rtnl, RTM_NEWLINK, manager_process_link, m); |
74b2466e LP |
214 | if (r < 0) |
215 | return r; | |
216 | ||
1c4baffc | 217 | r = sd_netlink_add_match(m->rtnl, RTM_DELLINK, manager_process_link, m); |
74b2466e LP |
218 | if (r < 0) |
219 | return r; | |
220 | ||
1c4baffc | 221 | r = sd_netlink_add_match(m->rtnl, RTM_NEWADDR, manager_process_address, m); |
74b2466e LP |
222 | if (r < 0) |
223 | return r; | |
091a364c | 224 | |
1c4baffc | 225 | r = sd_netlink_add_match(m->rtnl, RTM_DELADDR, manager_process_address, m); |
74b2466e LP |
226 | if (r < 0) |
227 | return r; | |
228 | ||
229 | /* Then, enumerate all links */ | |
230 | r = sd_rtnl_message_new_link(m->rtnl, &req, RTM_GETLINK, 0); | |
231 | if (r < 0) | |
232 | return r; | |
233 | ||
1c4baffc | 234 | r = sd_netlink_message_request_dump(req, true); |
74b2466e LP |
235 | if (r < 0) |
236 | return r; | |
237 | ||
1c4baffc | 238 | r = sd_netlink_call(m->rtnl, req, 0, &reply); |
74b2466e LP |
239 | if (r < 0) |
240 | return r; | |
241 | ||
1c4baffc | 242 | for (i = reply; i; i = sd_netlink_message_next(i)) { |
74b2466e LP |
243 | r = manager_process_link(m->rtnl, i, m); |
244 | if (r < 0) | |
245 | return r; | |
246 | } | |
247 | ||
1c4baffc TG |
248 | req = sd_netlink_message_unref(req); |
249 | reply = sd_netlink_message_unref(reply); | |
74b2466e LP |
250 | |
251 | /* Finally, enumerate all addresses, too */ | |
252 | r = sd_rtnl_message_new_addr(m->rtnl, &req, RTM_GETADDR, 0, AF_UNSPEC); | |
253 | if (r < 0) | |
254 | return r; | |
255 | ||
1c4baffc | 256 | r = sd_netlink_message_request_dump(req, true); |
74b2466e LP |
257 | if (r < 0) |
258 | return r; | |
259 | ||
1c4baffc | 260 | r = sd_netlink_call(m->rtnl, req, 0, &reply); |
74b2466e LP |
261 | if (r < 0) |
262 | return r; | |
263 | ||
1c4baffc | 264 | for (i = reply; i; i = sd_netlink_message_next(i)) { |
74b2466e LP |
265 | r = manager_process_address(m->rtnl, i, m); |
266 | if (r < 0) | |
267 | return r; | |
268 | } | |
269 | ||
270 | return r; | |
271 | } | |
272 | ||
273 | static int on_network_event(sd_event_source *s, int fd, uint32_t revents, void *userdata) { | |
274 | Manager *m = userdata; | |
275 | Iterator i; | |
276 | Link *l; | |
277 | int r; | |
278 | ||
279 | assert(m); | |
280 | ||
281 | sd_network_monitor_flush(m->network_monitor); | |
282 | ||
283 | HASHMAP_FOREACH(l, m->links, i) { | |
284 | r = link_update_monitor(l); | |
285 | if (r < 0) | |
da927ba9 | 286 | log_warning_errno(r, "Failed to update monitor information for %i: %m", l->ifindex); |
74b2466e LP |
287 | } |
288 | ||
289 | r = manager_write_resolv_conf(m); | |
290 | if (r < 0) | |
da927ba9 | 291 | log_warning_errno(r, "Could not update resolv.conf: %m"); |
74b2466e LP |
292 | |
293 | return 0; | |
294 | } | |
295 | ||
296 | static int manager_network_monitor_listen(Manager *m) { | |
297 | int r, fd, events; | |
298 | ||
299 | assert(m); | |
300 | ||
0014a4ad | 301 | r = sd_network_monitor_new(&m->network_monitor, NULL); |
74b2466e LP |
302 | if (r < 0) |
303 | return r; | |
304 | ||
305 | fd = sd_network_monitor_get_fd(m->network_monitor); | |
306 | if (fd < 0) | |
307 | return fd; | |
308 | ||
309 | events = sd_network_monitor_get_events(m->network_monitor); | |
310 | if (events < 0) | |
311 | return events; | |
312 | ||
313 | r = sd_event_add_io(m->event, &m->network_event_source, fd, events, &on_network_event, m); | |
314 | if (r < 0) | |
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 | ||
091a364c | 469 | int manager_new(Manager **ret) { |
74b2466e | 470 | _cleanup_(manager_freep) Manager *m = NULL; |
091a364c TG |
471 | int r; |
472 | ||
c92e531c LP |
473 | assert(ret); |
474 | ||
091a364c TG |
475 | m = new0(Manager, 1); |
476 | if (!m) | |
477 | return -ENOMEM; | |
478 | ||
1716f6dc | 479 | m->llmnr_ipv4_udp_fd = m->llmnr_ipv6_udp_fd = -1; |
623a4c97 | 480 | m->llmnr_ipv4_tcp_fd = m->llmnr_ipv6_tcp_fd = -1; |
bc7702b0 | 481 | m->mdns_ipv4_fd = m->mdns_ipv6_fd = -1; |
eb60f9cd | 482 | m->hostname_fd = -1; |
1716f6dc | 483 | |
af49ca27 | 484 | m->llmnr_support = RESOLVE_SUPPORT_YES; |
ad6c0475 LP |
485 | m->mdns_support = RESOLVE_SUPPORT_NO; |
486 | m->dnssec_mode = DNSSEC_NO; | |
5cb36f41 | 487 | m->read_resolv_conf = true; |
00fa60ae | 488 | m->need_builtin_fallbacks = true; |
dd0bc0f1 | 489 | m->etc_hosts_last = m->etc_hosts_mtime = USEC_INFINITY; |
091a364c | 490 | |
0d2cd476 LP |
491 | r = dns_trust_anchor_load(&m->trust_anchor); |
492 | if (r < 0) | |
493 | return r; | |
494 | ||
ad6c0475 LP |
495 | r = manager_parse_config_file(m); |
496 | if (r < 0) | |
497 | return r; | |
498 | ||
091a364c TG |
499 | r = sd_event_default(&m->event); |
500 | if (r < 0) | |
501 | return r; | |
502 | ||
503 | sd_event_add_signal(m->event, NULL, SIGTERM, NULL, NULL); | |
504 | sd_event_add_signal(m->event, NULL, SIGINT, NULL, NULL); | |
505 | ||
506 | sd_event_set_watchdog(m->event, true); | |
507 | ||
eb60f9cd LP |
508 | r = manager_watch_hostname(m); |
509 | if (r < 0) | |
510 | return r; | |
511 | ||
1716f6dc | 512 | r = dns_scope_new(m, &m->unicast_scope, NULL, DNS_PROTOCOL_DNS, AF_UNSPEC); |
74b2466e LP |
513 | if (r < 0) |
514 | return r; | |
515 | ||
516 | r = manager_network_monitor_listen(m); | |
517 | if (r < 0) | |
518 | return r; | |
519 | ||
520 | r = manager_rtnl_listen(m); | |
521 | if (r < 0) | |
522 | return r; | |
523 | ||
524 | r = manager_connect_bus(m); | |
525 | if (r < 0) | |
526 | return r; | |
527 | ||
4d506d6b LP |
528 | (void) sd_event_add_signal(m->event, &m->sigusr1_event_source, SIGUSR1, manager_sigusr1, m); |
529 | ||
091a364c TG |
530 | *ret = m; |
531 | m = NULL; | |
532 | ||
533 | return 0; | |
534 | } | |
535 | ||
edc501d4 LP |
536 | int manager_start(Manager *m) { |
537 | int r; | |
538 | ||
539 | assert(m); | |
540 | ||
541 | r = manager_llmnr_start(m); | |
542 | if (r < 0) | |
543 | return r; | |
544 | ||
bc7702b0 DM |
545 | r = manager_mdns_start(m); |
546 | if (r < 0) | |
547 | return r; | |
548 | ||
edc501d4 LP |
549 | return 0; |
550 | } | |
551 | ||
74b2466e LP |
552 | Manager *manager_free(Manager *m) { |
553 | Link *l; | |
091a364c TG |
554 | |
555 | if (!m) | |
74b2466e LP |
556 | return NULL; |
557 | ||
4b95f179 LP |
558 | dns_server_unlink_all(m->dns_servers); |
559 | dns_server_unlink_all(m->fallback_dns_servers); | |
a51c1048 LP |
560 | dns_search_domain_unlink_all(m->search_domains); |
561 | ||
74b2466e LP |
562 | while ((l = hashmap_first(m->links))) |
563 | link_free(l); | |
f0e15467 LP |
564 | |
565 | while (m->dns_queries) | |
566 | dns_query_free(m->dns_queries); | |
74b2466e | 567 | |
cab5b059 LP |
568 | dns_scope_free(m->unicast_scope); |
569 | ||
f0e15467 LP |
570 | hashmap_free(m->links); |
571 | hashmap_free(m->dns_transactions); | |
572 | ||
096b6773 LP |
573 | sd_event_source_unref(m->network_event_source); |
574 | sd_network_monitor_unref(m->network_monitor); | |
091a364c | 575 | |
a564ca2f LP |
576 | sd_netlink_unref(m->rtnl); |
577 | sd_event_source_unref(m->rtnl_event_source); | |
578 | ||
edc501d4 | 579 | manager_llmnr_stop(m); |
bc7702b0 | 580 | manager_mdns_stop(m); |
623a4c97 | 581 | |
902bb5d8 | 582 | sd_bus_slot_unref(m->prepare_for_sleep_slot); |
74b2466e LP |
583 | sd_event_source_unref(m->bus_retry_event_source); |
584 | sd_bus_unref(m->bus); | |
091a364c | 585 | |
4d506d6b LP |
586 | sd_event_source_unref(m->sigusr1_event_source); |
587 | ||
74b2466e | 588 | sd_event_unref(m->event); |
623a4c97 | 589 | |
78c6a153 LP |
590 | dns_resource_key_unref(m->llmnr_host_ipv4_key); |
591 | dns_resource_key_unref(m->llmnr_host_ipv6_key); | |
eb60f9cd | 592 | |
eb60f9cd | 593 | sd_event_source_unref(m->hostname_event_source); |
d9fcf2ba | 594 | safe_close(m->hostname_fd); |
78c6a153 LP |
595 | free(m->llmnr_hostname); |
596 | free(m->mdns_hostname); | |
eb60f9cd | 597 | |
0d2cd476 | 598 | dns_trust_anchor_flush(&m->trust_anchor); |
dd0bc0f1 | 599 | manager_etc_hosts_flush(m); |
0d2cd476 | 600 | |
091a364c | 601 | free(m); |
74b2466e LP |
602 | |
603 | return NULL; | |
091a364c TG |
604 | } |
605 | ||
1716f6dc | 606 | int manager_recv(Manager *m, int fd, DnsProtocol protocol, DnsPacket **ret) { |
74b2466e | 607 | _cleanup_(dns_packet_unrefp) DnsPacket *p = NULL; |
1716f6dc LP |
608 | union { |
609 | struct cmsghdr header; /* For alignment */ | |
40a1eebd | 610 | uint8_t buffer[CMSG_SPACE(MAXSIZE(struct in_pktinfo, struct in6_pktinfo)) |
1716f6dc | 611 | + CMSG_SPACE(int) /* ttl/hoplimit */ |
623a4c97 | 612 | + EXTRA_CMSG_SPACE /* kernel appears to require extra buffer space */]; |
1716f6dc LP |
613 | } control; |
614 | union sockaddr_union sa; | |
74b2466e | 615 | struct msghdr mh = {}; |
1716f6dc | 616 | struct cmsghdr *cmsg; |
74b2466e | 617 | struct iovec iov; |
1716f6dc | 618 | int ms = 0, r; |
74b2466e LP |
619 | ssize_t l; |
620 | ||
621 | assert(m); | |
1716f6dc | 622 | assert(fd >= 0); |
74b2466e LP |
623 | assert(ret); |
624 | ||
74b2466e LP |
625 | r = ioctl(fd, FIONREAD, &ms); |
626 | if (r < 0) | |
627 | return -errno; | |
628 | if (ms < 0) | |
629 | return -EIO; | |
630 | ||
1716f6dc | 631 | r = dns_packet_new(&p, protocol, ms); |
74b2466e LP |
632 | if (r < 0) |
633 | return r; | |
634 | ||
635 | iov.iov_base = DNS_PACKET_DATA(p); | |
636 | iov.iov_len = p->allocated; | |
637 | ||
1716f6dc LP |
638 | mh.msg_name = &sa.sa; |
639 | mh.msg_namelen = sizeof(sa); | |
74b2466e LP |
640 | mh.msg_iov = &iov; |
641 | mh.msg_iovlen = 1; | |
1716f6dc LP |
642 | mh.msg_control = &control; |
643 | mh.msg_controllen = sizeof(control); | |
74b2466e | 644 | |
a38d9945 | 645 | l = recvmsg(fd, &mh, 0); |
74b2466e | 646 | if (l < 0) { |
ad867662 | 647 | if (errno == EAGAIN || errno == EINTR) |
74b2466e LP |
648 | return 0; |
649 | ||
650 | return -errno; | |
091a364c TG |
651 | } |
652 | ||
74b2466e LP |
653 | if (l <= 0) |
654 | return -EIO; | |
091a364c | 655 | |
1716f6dc LP |
656 | assert(!(mh.msg_flags & MSG_CTRUNC)); |
657 | assert(!(mh.msg_flags & MSG_TRUNC)); | |
658 | ||
74b2466e | 659 | p->size = (size_t) l; |
091a364c | 660 | |
1716f6dc | 661 | p->family = sa.sa.sa_family; |
623a4c97 LP |
662 | p->ipproto = IPPROTO_UDP; |
663 | if (p->family == AF_INET) { | |
1716f6dc | 664 | p->sender.in = sa.in.sin_addr; |
623a4c97 LP |
665 | p->sender_port = be16toh(sa.in.sin_port); |
666 | } else if (p->family == AF_INET6) { | |
1716f6dc | 667 | p->sender.in6 = sa.in6.sin6_addr; |
623a4c97 LP |
668 | p->sender_port = be16toh(sa.in6.sin6_port); |
669 | p->ifindex = sa.in6.sin6_scope_id; | |
670 | } else | |
1716f6dc | 671 | return -EAFNOSUPPORT; |
74b2466e | 672 | |
2a1288ff | 673 | CMSG_FOREACH(cmsg, &mh) { |
74b2466e | 674 | |
1716f6dc LP |
675 | if (cmsg->cmsg_level == IPPROTO_IPV6) { |
676 | assert(p->family == AF_INET6); | |
74b2466e | 677 | |
1716f6dc | 678 | switch (cmsg->cmsg_type) { |
74b2466e | 679 | |
1716f6dc LP |
680 | case IPV6_PKTINFO: { |
681 | struct in6_pktinfo *i = (struct in6_pktinfo*) CMSG_DATA(cmsg); | |
74b2466e | 682 | |
623a4c97 LP |
683 | if (p->ifindex <= 0) |
684 | p->ifindex = i->ipi6_ifindex; | |
685 | ||
1716f6dc LP |
686 | p->destination.in6 = i->ipi6_addr; |
687 | break; | |
688 | } | |
74b2466e | 689 | |
1716f6dc LP |
690 | case IPV6_HOPLIMIT: |
691 | p->ttl = *(int *) CMSG_DATA(cmsg); | |
692 | break; | |
74b2466e | 693 | |
1716f6dc LP |
694 | } |
695 | } else if (cmsg->cmsg_level == IPPROTO_IP) { | |
696 | assert(p->family == AF_INET); | |
74b2466e | 697 | |
1716f6dc | 698 | switch (cmsg->cmsg_type) { |
74b2466e | 699 | |
1716f6dc LP |
700 | case IP_PKTINFO: { |
701 | struct in_pktinfo *i = (struct in_pktinfo*) CMSG_DATA(cmsg); | |
091a364c | 702 | |
623a4c97 LP |
703 | if (p->ifindex <= 0) |
704 | p->ifindex = i->ipi_ifindex; | |
705 | ||
1716f6dc LP |
706 | p->destination.in = i->ipi_addr; |
707 | break; | |
708 | } | |
74b2466e | 709 | |
623a4c97 | 710 | case IP_TTL: |
1716f6dc LP |
711 | p->ttl = *(int *) CMSG_DATA(cmsg); |
712 | break; | |
713 | } | |
714 | } | |
715 | } | |
74b2466e | 716 | |
623a4c97 LP |
717 | /* The Linux kernel sets the interface index to the loopback |
718 | * device if the packet came from the local host since it | |
719 | * avoids the routing table in such a case. Let's unset the | |
720 | * interface index in such a case. */ | |
a5f03596 | 721 | if (p->ifindex == LOOPBACK_IFINDEX) |
623a4c97 LP |
722 | p->ifindex = 0; |
723 | ||
86ad4cd7 TG |
724 | if (protocol != DNS_PROTOCOL_DNS) { |
725 | /* If we don't know the interface index still, we look for the | |
726 | * first local interface with a matching address. Yuck! */ | |
727 | if (p->ifindex <= 0) | |
728 | p->ifindex = manager_find_ifindex(m, p->family, &p->destination); | |
729 | } | |
623a4c97 | 730 | |
74b2466e LP |
731 | *ret = p; |
732 | p = NULL; | |
733 | ||
734 | return 1; | |
735 | } | |
736 | ||
74b2466e LP |
737 | static int sendmsg_loop(int fd, struct msghdr *mh, int flags) { |
738 | int r; | |
739 | ||
740 | assert(fd >= 0); | |
741 | assert(mh); | |
742 | ||
743 | for (;;) { | |
744 | if (sendmsg(fd, mh, flags) >= 0) | |
745 | return 0; | |
746 | ||
747 | if (errno == EINTR) | |
748 | continue; | |
749 | ||
750 | if (errno != EAGAIN) | |
751 | return -errno; | |
752 | ||
753 | r = fd_wait_for_event(fd, POLLOUT, SEND_TIMEOUT_USEC); | |
754 | if (r < 0) | |
755 | return r; | |
756 | if (r == 0) | |
757 | return -ETIMEDOUT; | |
758 | } | |
759 | } | |
760 | ||
72290734 TG |
761 | static int write_loop(int fd, void *message, size_t length) { |
762 | int r; | |
763 | ||
764 | assert(fd >= 0); | |
765 | assert(message); | |
766 | ||
767 | for (;;) { | |
768 | if (write(fd, message, length) >= 0) | |
769 | return 0; | |
770 | ||
771 | if (errno == EINTR) | |
772 | continue; | |
773 | ||
774 | if (errno != EAGAIN) | |
775 | return -errno; | |
776 | ||
777 | r = fd_wait_for_event(fd, POLLOUT, SEND_TIMEOUT_USEC); | |
778 | if (r < 0) | |
779 | return r; | |
780 | if (r == 0) | |
781 | return -ETIMEDOUT; | |
782 | } | |
783 | } | |
784 | ||
785 | int manager_write(Manager *m, int fd, DnsPacket *p) { | |
786 | int r; | |
787 | ||
deb3f3d3 | 788 | log_debug("Sending %s packet with id %" PRIu16 ".", DNS_PACKET_QR(p) ? "response" : "query", DNS_PACKET_ID(p)); |
72290734 TG |
789 | |
790 | r = write_loop(fd, DNS_PACKET_DATA(p), p->size); | |
791 | if (r < 0) | |
792 | return r; | |
793 | ||
794 | return 0; | |
795 | } | |
796 | ||
623a4c97 | 797 | static int manager_ipv4_send(Manager *m, int fd, int ifindex, const struct in_addr *addr, uint16_t port, DnsPacket *p) { |
74b2466e LP |
798 | union sockaddr_union sa = { |
799 | .in.sin_family = AF_INET, | |
74b2466e | 800 | }; |
1716f6dc LP |
801 | union { |
802 | struct cmsghdr header; /* For alignment */ | |
803 | uint8_t buffer[CMSG_SPACE(sizeof(struct in_pktinfo))]; | |
804 | } control; | |
74b2466e LP |
805 | struct msghdr mh = {}; |
806 | struct iovec iov; | |
74b2466e LP |
807 | |
808 | assert(m); | |
1716f6dc LP |
809 | assert(fd >= 0); |
810 | assert(addr); | |
811 | assert(port > 0); | |
74b2466e LP |
812 | assert(p); |
813 | ||
74b2466e LP |
814 | iov.iov_base = DNS_PACKET_DATA(p); |
815 | iov.iov_len = p->size; | |
091a364c | 816 | |
1716f6dc LP |
817 | sa.in.sin_addr = *addr; |
818 | sa.in.sin_port = htobe16(port), | |
091a364c | 819 | |
74b2466e LP |
820 | mh.msg_iov = &iov; |
821 | mh.msg_iovlen = 1; | |
822 | mh.msg_name = &sa.sa; | |
823 | mh.msg_namelen = sizeof(sa.in); | |
091a364c | 824 | |
74b2466e LP |
825 | if (ifindex > 0) { |
826 | struct cmsghdr *cmsg; | |
827 | struct in_pktinfo *pi; | |
828 | ||
829 | zero(control); | |
830 | ||
1716f6dc | 831 | mh.msg_control = &control; |
74b2466e LP |
832 | mh.msg_controllen = CMSG_LEN(sizeof(struct in_pktinfo)); |
833 | ||
834 | cmsg = CMSG_FIRSTHDR(&mh); | |
835 | cmsg->cmsg_len = mh.msg_controllen; | |
836 | cmsg->cmsg_level = IPPROTO_IP; | |
837 | cmsg->cmsg_type = IP_PKTINFO; | |
838 | ||
839 | pi = (struct in_pktinfo*) CMSG_DATA(cmsg); | |
840 | pi->ipi_ifindex = ifindex; | |
841 | } | |
842 | ||
843 | return sendmsg_loop(fd, &mh, 0); | |
844 | } | |
845 | ||
623a4c97 | 846 | static int manager_ipv6_send(Manager *m, int fd, int ifindex, const struct in6_addr *addr, uint16_t port, DnsPacket *p) { |
74b2466e LP |
847 | union sockaddr_union sa = { |
848 | .in6.sin6_family = AF_INET6, | |
74b2466e | 849 | }; |
1716f6dc LP |
850 | union { |
851 | struct cmsghdr header; /* For alignment */ | |
852 | uint8_t buffer[CMSG_SPACE(sizeof(struct in6_pktinfo))]; | |
853 | } control; | |
74b2466e LP |
854 | struct msghdr mh = {}; |
855 | struct iovec iov; | |
74b2466e LP |
856 | |
857 | assert(m); | |
1716f6dc LP |
858 | assert(fd >= 0); |
859 | assert(addr); | |
860 | assert(port > 0); | |
74b2466e LP |
861 | assert(p); |
862 | ||
74b2466e LP |
863 | iov.iov_base = DNS_PACKET_DATA(p); |
864 | iov.iov_len = p->size; | |
865 | ||
1716f6dc LP |
866 | sa.in6.sin6_addr = *addr; |
867 | sa.in6.sin6_port = htobe16(port), | |
74b2466e LP |
868 | sa.in6.sin6_scope_id = ifindex; |
869 | ||
870 | mh.msg_iov = &iov; | |
871 | mh.msg_iovlen = 1; | |
872 | mh.msg_name = &sa.sa; | |
873 | mh.msg_namelen = sizeof(sa.in6); | |
874 | ||
875 | if (ifindex > 0) { | |
876 | struct cmsghdr *cmsg; | |
877 | struct in6_pktinfo *pi; | |
878 | ||
879 | zero(control); | |
880 | ||
1716f6dc | 881 | mh.msg_control = &control; |
74b2466e LP |
882 | mh.msg_controllen = CMSG_LEN(sizeof(struct in6_pktinfo)); |
883 | ||
884 | cmsg = CMSG_FIRSTHDR(&mh); | |
885 | cmsg->cmsg_len = mh.msg_controllen; | |
886 | cmsg->cmsg_level = IPPROTO_IPV6; | |
887 | cmsg->cmsg_type = IPV6_PKTINFO; | |
888 | ||
889 | pi = (struct in6_pktinfo*) CMSG_DATA(cmsg); | |
890 | pi->ipi6_ifindex = ifindex; | |
891 | } | |
892 | ||
893 | return sendmsg_loop(fd, &mh, 0); | |
894 | } | |
895 | ||
623a4c97 | 896 | int manager_send(Manager *m, int fd, int ifindex, int family, const union in_addr_union *addr, uint16_t port, DnsPacket *p) { |
1716f6dc LP |
897 | assert(m); |
898 | assert(fd >= 0); | |
899 | assert(addr); | |
900 | assert(port > 0); | |
901 | assert(p); | |
902 | ||
deb3f3d3 | 903 | 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 | 904 | |
1716f6dc LP |
905 | if (family == AF_INET) |
906 | return manager_ipv4_send(m, fd, ifindex, &addr->in, port, p); | |
907 | else if (family == AF_INET6) | |
908 | return manager_ipv6_send(m, fd, ifindex, &addr->in6, port, p); | |
909 | ||
910 | return -EAFNOSUPPORT; | |
911 | } | |
912 | ||
e1c95994 LP |
913 | uint32_t manager_find_mtu(Manager *m) { |
914 | uint32_t mtu = 0; | |
915 | Link *l; | |
916 | Iterator i; | |
917 | ||
918 | /* If we don't know on which link a DNS packet would be | |
919 | * delivered, let's find the largest MTU that works on all | |
920 | * interfaces we know of */ | |
921 | ||
922 | HASHMAP_FOREACH(l, m->links, i) { | |
923 | if (l->mtu <= 0) | |
924 | continue; | |
925 | ||
926 | if (mtu <= 0 || l->mtu < mtu) | |
927 | mtu = l->mtu; | |
928 | } | |
929 | ||
930 | return mtu; | |
931 | } | |
1716f6dc | 932 | |
623a4c97 | 933 | int manager_find_ifindex(Manager *m, int family, const union in_addr_union *in_addr) { |
ec2c5e43 LP |
934 | LinkAddress *a; |
935 | ||
936 | assert(m); | |
937 | ||
4e945a6f | 938 | a = manager_find_link_address(m, family, in_addr); |
ec2c5e43 LP |
939 | if (a) |
940 | return a->link->ifindex; | |
941 | ||
942 | return 0; | |
943 | } | |
944 | ||
eb60f9cd LP |
945 | void manager_refresh_rrs(Manager *m) { |
946 | Iterator i; | |
947 | Link *l; | |
948 | ||
949 | assert(m); | |
950 | ||
78c6a153 LP |
951 | m->llmnr_host_ipv4_key = dns_resource_key_unref(m->llmnr_host_ipv4_key); |
952 | m->llmnr_host_ipv6_key = dns_resource_key_unref(m->llmnr_host_ipv6_key); | |
eb60f9cd LP |
953 | |
954 | HASHMAP_FOREACH(l, m->links, i) { | |
955 | link_add_rrs(l, true); | |
956 | link_add_rrs(l, false); | |
957 | } | |
958 | } | |
959 | ||
ec2c5e43 LP |
960 | int manager_next_hostname(Manager *m) { |
961 | const char *p; | |
556a2294 | 962 | uint64_t u, a; |
78c6a153 LP |
963 | char *h, *k; |
964 | int r; | |
623a4c97 LP |
965 | |
966 | assert(m); | |
967 | ||
78c6a153 | 968 | p = strchr(m->llmnr_hostname, 0); |
ec2c5e43 LP |
969 | assert(p); |
970 | ||
78c6a153 | 971 | while (p > m->llmnr_hostname) { |
ec2c5e43 LP |
972 | if (!strchr("0123456789", p[-1])) |
973 | break; | |
974 | ||
975 | p--; | |
976 | } | |
977 | ||
978 | if (*p == 0 || safe_atou64(p, &u) < 0 || u <= 0) | |
979 | u = 1; | |
980 | ||
556a2294 LP |
981 | /* Add a random number to the old value. This way we can avoid |
982 | * that two hosts pick the same hostname, win on IPv4 and lose | |
983 | * on IPv6 (or vice versa), and pick the same hostname | |
984 | * replacement hostname, ad infinitum. We still want the | |
985 | * numbers to go up monotonically, hence we just add a random | |
986 | * value 1..10 */ | |
987 | ||
988 | random_bytes(&a, sizeof(a)); | |
989 | u += 1 + a % 10; | |
ec2c5e43 | 990 | |
78c6a153 | 991 | if (asprintf(&h, "%.*s%" PRIu64, (int) (p - m->llmnr_hostname), m->llmnr_hostname, u) < 0) |
ec2c5e43 LP |
992 | return -ENOMEM; |
993 | ||
78c6a153 LP |
994 | r = dns_name_concat(h, "local", &k); |
995 | if (r < 0) { | |
996 | free(h); | |
997 | return r; | |
998 | } | |
999 | ||
1000 | log_info("Hostname conflict, changing published hostname from '%s' to '%s'.", m->llmnr_hostname, h); | |
1001 | ||
1002 | free(m->llmnr_hostname); | |
1003 | m->llmnr_hostname = h; | |
ec2c5e43 | 1004 | |
78c6a153 LP |
1005 | free(m->mdns_hostname); |
1006 | m->mdns_hostname = k; | |
ec2c5e43 | 1007 | |
eb60f9cd | 1008 | manager_refresh_rrs(m); |
623a4c97 LP |
1009 | |
1010 | return 0; | |
1011 | } | |
ec2c5e43 | 1012 | |
4e945a6f | 1013 | LinkAddress* manager_find_link_address(Manager *m, int family, const union in_addr_union *in_addr) { |
ec2c5e43 LP |
1014 | Iterator i; |
1015 | Link *l; | |
1016 | ||
1017 | assert(m); | |
1018 | ||
1019 | HASHMAP_FOREACH(l, m->links, i) { | |
1020 | LinkAddress *a; | |
1021 | ||
1022 | a = link_find_address(l, family, in_addr); | |
1023 | if (a) | |
1024 | return a; | |
1025 | } | |
1026 | ||
1027 | return NULL; | |
1028 | } | |
1029 | ||
a4076574 | 1030 | bool manager_our_packet(Manager *m, DnsPacket *p) { |
ec2c5e43 LP |
1031 | assert(m); |
1032 | assert(p); | |
1033 | ||
4e945a6f | 1034 | return !!manager_find_link_address(m, p->family, &p->sender); |
ec2c5e43 | 1035 | } |
4e945a6f | 1036 | |
a4076574 LP |
1037 | DnsScope* manager_find_scope(Manager *m, DnsPacket *p) { |
1038 | Link *l; | |
1039 | ||
1040 | assert(m); | |
1041 | assert(p); | |
1042 | ||
1043 | l = hashmap_get(m->links, INT_TO_PTR(p->ifindex)); | |
1044 | if (!l) | |
1045 | return NULL; | |
1046 | ||
b4f1862d DM |
1047 | switch (p->protocol) { |
1048 | case DNS_PROTOCOL_LLMNR: | |
a4076574 LP |
1049 | if (p->family == AF_INET) |
1050 | return l->llmnr_ipv4_scope; | |
1051 | else if (p->family == AF_INET6) | |
1052 | return l->llmnr_ipv6_scope; | |
b4f1862d DM |
1053 | |
1054 | break; | |
1055 | ||
1056 | case DNS_PROTOCOL_MDNS: | |
1057 | if (p->family == AF_INET) | |
1058 | return l->mdns_ipv4_scope; | |
1059 | else if (p->family == AF_INET6) | |
1060 | return l->mdns_ipv6_scope; | |
1061 | ||
1062 | break; | |
1063 | ||
1064 | default: | |
1065 | break; | |
a4076574 LP |
1066 | } |
1067 | ||
1068 | return NULL; | |
1069 | } | |
1070 | ||
902bb5d8 LP |
1071 | void manager_verify_all(Manager *m) { |
1072 | DnsScope *s; | |
1073 | ||
1074 | assert(m); | |
1075 | ||
1076 | LIST_FOREACH(scopes, s, m->dns_scopes) | |
1077 | dns_zone_verify_all(&s->zone); | |
1078 | } | |
1079 | ||
78c6a153 | 1080 | int manager_is_own_hostname(Manager *m, const char *name) { |
78c6a153 LP |
1081 | int r; |
1082 | ||
1083 | assert(m); | |
1084 | assert(name); | |
1085 | ||
1086 | if (m->llmnr_hostname) { | |
1087 | r = dns_name_equal(name, m->llmnr_hostname); | |
1088 | if (r != 0) | |
1089 | return r; | |
1090 | } | |
1091 | ||
1092 | if (m->mdns_hostname) | |
1093 | return dns_name_equal(name, m->mdns_hostname); | |
1094 | ||
1095 | return 0; | |
1096 | } | |
1097 | ||
9176a57c LP |
1098 | int manager_compile_dns_servers(Manager *m, OrderedSet **dns) { |
1099 | DnsServer *s; | |
1100 | Iterator i; | |
1101 | Link *l; | |
1102 | int r; | |
1103 | ||
1104 | assert(m); | |
1105 | assert(dns); | |
1106 | ||
1107 | r = ordered_set_ensure_allocated(dns, &dns_server_hash_ops); | |
1108 | if (r < 0) | |
1109 | return r; | |
1110 | ||
1111 | /* First add the system-wide servers and domains */ | |
1112 | LIST_FOREACH(servers, s, m->dns_servers) { | |
1113 | r = ordered_set_put(*dns, s); | |
1114 | if (r == -EEXIST) | |
1115 | continue; | |
1116 | if (r < 0) | |
1117 | return r; | |
1118 | } | |
1119 | ||
1120 | /* Then, add the per-link servers */ | |
1121 | HASHMAP_FOREACH(l, m->links, i) { | |
1122 | LIST_FOREACH(servers, s, l->dns_servers) { | |
1123 | r = ordered_set_put(*dns, s); | |
1124 | if (r == -EEXIST) | |
1125 | continue; | |
1126 | if (r < 0) | |
1127 | return r; | |
1128 | } | |
1129 | } | |
1130 | ||
1131 | /* If we found nothing, add the fallback servers */ | |
1132 | if (ordered_set_isempty(*dns)) { | |
1133 | LIST_FOREACH(servers, s, m->fallback_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 | return 0; | |
1143 | } | |
1144 | ||
1145 | int manager_compile_search_domains(Manager *m, OrderedSet **domains) { | |
1146 | DnsSearchDomain *d; | |
1147 | Iterator i; | |
1148 | Link *l; | |
1149 | int r; | |
1150 | ||
1151 | assert(m); | |
1152 | assert(domains); | |
1153 | ||
1154 | r = ordered_set_ensure_allocated(domains, &dns_name_hash_ops); | |
1155 | if (r < 0) | |
1156 | return r; | |
1157 | ||
1158 | LIST_FOREACH(domains, d, m->search_domains) { | |
1159 | r = ordered_set_put(*domains, d->name); | |
1160 | if (r == -EEXIST) | |
1161 | continue; | |
1162 | if (r < 0) | |
1163 | return r; | |
1164 | } | |
1165 | ||
1166 | HASHMAP_FOREACH(l, m->links, i) { | |
1167 | ||
1168 | LIST_FOREACH(domains, d, l->search_domains) { | |
1169 | r = ordered_set_put(*domains, d->name); | |
1170 | if (r == -EEXIST) | |
1171 | continue; | |
1172 | if (r < 0) | |
1173 | return r; | |
1174 | } | |
1175 | } | |
1176 | ||
1177 | return 0; | |
1178 | } | |
c69fa7e3 LP |
1179 | |
1180 | DnssecMode manager_get_dnssec_mode(Manager *m) { | |
1181 | assert(m); | |
1182 | ||
1183 | if (m->dnssec_mode != _DNSSEC_MODE_INVALID) | |
1184 | return m->dnssec_mode; | |
1185 | ||
1186 | return DNSSEC_NO; | |
1187 | } | |
1188 | ||
1189 | bool manager_dnssec_supported(Manager *m) { | |
1190 | DnsServer *server; | |
1191 | Iterator i; | |
1192 | Link *l; | |
1193 | ||
1194 | assert(m); | |
1195 | ||
1196 | if (manager_get_dnssec_mode(m) == DNSSEC_NO) | |
1197 | return false; | |
1198 | ||
1199 | server = manager_get_dns_server(m); | |
1200 | if (server && !dns_server_dnssec_supported(server)) | |
1201 | return false; | |
1202 | ||
1203 | HASHMAP_FOREACH(l, m->links, i) | |
1204 | if (!link_dnssec_supported(l)) | |
1205 | return false; | |
1206 | ||
1207 | return true; | |
1208 | } | |
59c5b597 LP |
1209 | |
1210 | void manager_dnssec_verdict(Manager *m, DnssecVerdict verdict, const DnsResourceKey *key) { | |
1211 | ||
1212 | assert(verdict >= 0); | |
1213 | assert(verdict < _DNSSEC_VERDICT_MAX); | |
1214 | ||
1215 | if (log_get_max_level() >= LOG_DEBUG) { | |
1216 | _cleanup_free_ char *s = NULL; | |
1217 | ||
1218 | (void) dns_resource_key_to_string(key, &s); | |
1219 | ||
1220 | log_debug("Found verdict for lookup %s: %s", s ? strstrip(s) : "n/a", dnssec_verdict_to_string(verdict)); | |
1221 | } | |
1222 | ||
1223 | m->n_dnssec_verdict[verdict]++; | |
1224 | } |