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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 | ||
2d895038 | 209 | r = sd_netlink_attach_event(m->rtnl, m->event, SD_EVENT_PRIORITY_IMPORTANT); |
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) | |
77abf3c1 | 291 | log_warning_errno(r, "Could not update "PRIVATE_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) | |
2d895038 LP |
315 | return r; |
316 | ||
317 | r = sd_event_source_set_priority(m->network_event_source, SD_EVENT_PRIORITY_IMPORTANT+5); | |
318 | if (r < 0) | |
74b2466e LP |
319 | return r; |
320 | ||
aa4a9deb LP |
321 | (void) sd_event_source_set_description(m->network_event_source, "network-monitor"); |
322 | ||
74b2466e LP |
323 | return 0; |
324 | } | |
325 | ||
78c6a153 | 326 | static int determine_hostname(char **llmnr_hostname, char **mdns_hostname) { |
eb60f9cd | 327 | _cleanup_free_ char *h = NULL, *n = NULL; |
78c6a153 LP |
328 | char label[DNS_LABEL_MAX]; |
329 | const char *p; | |
330 | int r, k; | |
eb60f9cd | 331 | |
78c6a153 LP |
332 | assert(llmnr_hostname); |
333 | assert(mdns_hostname); | |
334 | ||
335 | /* Extract and normalize the first label of the locally | |
336 | * configured hostname, and check it's not "localhost". */ | |
eb60f9cd LP |
337 | |
338 | h = gethostname_malloc(); | |
339 | if (!h) | |
340 | return log_oom(); | |
341 | ||
78c6a153 LP |
342 | p = h; |
343 | r = dns_label_unescape(&p, label, sizeof(label)); | |
344 | if (r < 0) | |
345 | return log_error_errno(r, "Failed to unescape host name: %m"); | |
346 | if (r == 0) { | |
347 | log_error("Couldn't find a single label in hosntame."); | |
348 | return -EINVAL; | |
349 | } | |
350 | ||
351 | k = dns_label_undo_idna(label, r, label, sizeof(label)); | |
352 | if (k < 0) | |
353 | return log_error_errno(k, "Failed to undo IDNA: %m"); | |
354 | if (k > 0) | |
355 | r = k; | |
356 | ||
357 | if (!utf8_is_valid(label)) { | |
eb60f9cd LP |
358 | log_error("System hostname is not UTF-8 clean."); |
359 | return -EINVAL; | |
360 | } | |
361 | ||
422baca0 | 362 | r = dns_label_escape_new(label, r, &n); |
78c6a153 LP |
363 | if (r < 0) |
364 | return log_error_errno(r, "Failed to escape host name: %m"); | |
365 | ||
366 | if (is_localhost(n)) { | |
367 | log_debug("System hostname is 'localhost', ignoring."); | |
368 | return -EINVAL; | |
eb60f9cd LP |
369 | } |
370 | ||
78c6a153 LP |
371 | r = dns_name_concat(n, "local", mdns_hostname); |
372 | if (r < 0) | |
373 | return log_error_errno(r, "Failed to determine mDNS hostname: %m"); | |
374 | ||
375 | *llmnr_hostname = n; | |
eb60f9cd LP |
376 | n = NULL; |
377 | ||
378 | return 0; | |
379 | } | |
380 | ||
381 | static int on_hostname_change(sd_event_source *es, int fd, uint32_t revents, void *userdata) { | |
78c6a153 | 382 | _cleanup_free_ char *llmnr_hostname = NULL, *mdns_hostname = NULL; |
eb60f9cd LP |
383 | Manager *m = userdata; |
384 | int r; | |
385 | ||
386 | assert(m); | |
387 | ||
78c6a153 | 388 | r = determine_hostname(&llmnr_hostname, &mdns_hostname); |
eb60f9cd LP |
389 | if (r < 0) |
390 | return 0; /* ignore invalid hostnames */ | |
391 | ||
78c6a153 | 392 | if (streq(llmnr_hostname, m->llmnr_hostname) && streq(mdns_hostname, m->mdns_hostname)) |
eb60f9cd LP |
393 | return 0; |
394 | ||
78c6a153 LP |
395 | log_info("System hostname changed to '%s'.", llmnr_hostname); |
396 | ||
397 | free(m->llmnr_hostname); | |
398 | free(m->mdns_hostname); | |
399 | ||
400 | m->llmnr_hostname = llmnr_hostname; | |
401 | m->mdns_hostname = mdns_hostname; | |
402 | ||
403 | llmnr_hostname = mdns_hostname = NULL; | |
eb60f9cd LP |
404 | |
405 | manager_refresh_rrs(m); | |
406 | ||
407 | return 0; | |
408 | } | |
409 | ||
410 | static int manager_watch_hostname(Manager *m) { | |
eb60f9cd LP |
411 | int r; |
412 | ||
413 | assert(m); | |
414 | ||
415 | m->hostname_fd = open("/proc/sys/kernel/hostname", O_RDONLY|O_CLOEXEC|O_NDELAY|O_NOCTTY); | |
416 | if (m->hostname_fd < 0) { | |
56f64d95 | 417 | log_warning_errno(errno, "Failed to watch hostname: %m"); |
eb60f9cd LP |
418 | return 0; |
419 | } | |
420 | ||
421 | r = sd_event_add_io(m->event, &m->hostname_event_source, m->hostname_fd, 0, on_hostname_change, m); | |
422 | if (r < 0) { | |
423 | if (r == -EPERM) | |
424 | /* kernels prior to 3.2 don't support polling this file. Ignore the failure. */ | |
425 | m->hostname_fd = safe_close(m->hostname_fd); | |
8d3d7072 MS |
426 | else |
427 | return log_error_errno(r, "Failed to add hostname event source: %m"); | |
eb60f9cd LP |
428 | } |
429 | ||
aa4a9deb LP |
430 | (void) sd_event_source_set_description(m->hostname_event_source, "hostname"); |
431 | ||
78c6a153 | 432 | r = determine_hostname(&m->llmnr_hostname, &m->mdns_hostname); |
eb60f9cd LP |
433 | if (r < 0) { |
434 | log_info("Defaulting to hostname 'linux'."); | |
78c6a153 LP |
435 | m->llmnr_hostname = strdup("linux"); |
436 | if (!m->llmnr_hostname) | |
437 | return log_oom(); | |
438 | ||
439 | m->mdns_hostname = strdup("linux.local"); | |
440 | if (!m->mdns_hostname) | |
eb60f9cd LP |
441 | return log_oom(); |
442 | } else | |
78c6a153 | 443 | log_info("Using system hostname '%s'.", m->llmnr_hostname); |
eb60f9cd LP |
444 | |
445 | return 0; | |
446 | } | |
447 | ||
4d506d6b LP |
448 | static int manager_sigusr1(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) { |
449 | _cleanup_free_ char *buffer = NULL; | |
450 | _cleanup_fclose_ FILE *f = NULL; | |
451 | Manager *m = userdata; | |
452 | size_t size = 0; | |
453 | DnsScope *scope; | |
454 | ||
455 | assert(s); | |
456 | assert(si); | |
457 | assert(m); | |
458 | ||
459 | f = open_memstream(&buffer, &size); | |
460 | if (!f) | |
461 | return log_oom(); | |
462 | ||
463 | LIST_FOREACH(scopes, scope, m->dns_scopes) | |
464 | dns_scope_dump(scope, f); | |
465 | ||
466 | if (fflush_and_check(f) < 0) | |
467 | return log_oom(); | |
468 | ||
469 | log_dump(LOG_INFO, buffer); | |
470 | return 0; | |
471 | } | |
472 | ||
091a364c | 473 | int manager_new(Manager **ret) { |
74b2466e | 474 | _cleanup_(manager_freep) Manager *m = NULL; |
091a364c TG |
475 | int r; |
476 | ||
c92e531c LP |
477 | assert(ret); |
478 | ||
091a364c TG |
479 | m = new0(Manager, 1); |
480 | if (!m) | |
481 | return -ENOMEM; | |
482 | ||
1716f6dc | 483 | m->llmnr_ipv4_udp_fd = m->llmnr_ipv6_udp_fd = -1; |
623a4c97 | 484 | m->llmnr_ipv4_tcp_fd = m->llmnr_ipv6_tcp_fd = -1; |
bc7702b0 | 485 | m->mdns_ipv4_fd = m->mdns_ipv6_fd = -1; |
eb60f9cd | 486 | m->hostname_fd = -1; |
1716f6dc | 487 | |
af49ca27 | 488 | m->llmnr_support = RESOLVE_SUPPORT_YES; |
ad6c0475 LP |
489 | m->mdns_support = RESOLVE_SUPPORT_NO; |
490 | m->dnssec_mode = DNSSEC_NO; | |
5cb36f41 | 491 | m->read_resolv_conf = true; |
00fa60ae | 492 | m->need_builtin_fallbacks = true; |
dd0bc0f1 | 493 | m->etc_hosts_last = m->etc_hosts_mtime = USEC_INFINITY; |
091a364c | 494 | |
0d2cd476 LP |
495 | r = dns_trust_anchor_load(&m->trust_anchor); |
496 | if (r < 0) | |
497 | return r; | |
498 | ||
ad6c0475 LP |
499 | r = manager_parse_config_file(m); |
500 | if (r < 0) | |
501 | return r; | |
502 | ||
091a364c TG |
503 | r = sd_event_default(&m->event); |
504 | if (r < 0) | |
505 | return r; | |
506 | ||
507 | sd_event_add_signal(m->event, NULL, SIGTERM, NULL, NULL); | |
508 | sd_event_add_signal(m->event, NULL, SIGINT, NULL, NULL); | |
509 | ||
510 | sd_event_set_watchdog(m->event, true); | |
511 | ||
eb60f9cd LP |
512 | r = manager_watch_hostname(m); |
513 | if (r < 0) | |
514 | return r; | |
515 | ||
1716f6dc | 516 | r = dns_scope_new(m, &m->unicast_scope, NULL, DNS_PROTOCOL_DNS, AF_UNSPEC); |
74b2466e LP |
517 | if (r < 0) |
518 | return r; | |
519 | ||
520 | r = manager_network_monitor_listen(m); | |
521 | if (r < 0) | |
522 | return r; | |
523 | ||
524 | r = manager_rtnl_listen(m); | |
525 | if (r < 0) | |
526 | return r; | |
527 | ||
528 | r = manager_connect_bus(m); | |
529 | if (r < 0) | |
530 | return r; | |
531 | ||
4d506d6b LP |
532 | (void) sd_event_add_signal(m->event, &m->sigusr1_event_source, SIGUSR1, manager_sigusr1, m); |
533 | ||
091a364c TG |
534 | *ret = m; |
535 | m = NULL; | |
536 | ||
537 | return 0; | |
538 | } | |
539 | ||
edc501d4 LP |
540 | int manager_start(Manager *m) { |
541 | int r; | |
542 | ||
543 | assert(m); | |
544 | ||
545 | r = manager_llmnr_start(m); | |
546 | if (r < 0) | |
547 | return r; | |
548 | ||
bc7702b0 DM |
549 | r = manager_mdns_start(m); |
550 | if (r < 0) | |
551 | return r; | |
552 | ||
edc501d4 LP |
553 | return 0; |
554 | } | |
555 | ||
74b2466e LP |
556 | Manager *manager_free(Manager *m) { |
557 | Link *l; | |
091a364c TG |
558 | |
559 | if (!m) | |
74b2466e LP |
560 | return NULL; |
561 | ||
4b95f179 LP |
562 | dns_server_unlink_all(m->dns_servers); |
563 | dns_server_unlink_all(m->fallback_dns_servers); | |
a51c1048 LP |
564 | dns_search_domain_unlink_all(m->search_domains); |
565 | ||
74b2466e LP |
566 | while ((l = hashmap_first(m->links))) |
567 | link_free(l); | |
f0e15467 LP |
568 | |
569 | while (m->dns_queries) | |
570 | dns_query_free(m->dns_queries); | |
74b2466e | 571 | |
cab5b059 LP |
572 | dns_scope_free(m->unicast_scope); |
573 | ||
f0e15467 LP |
574 | hashmap_free(m->links); |
575 | hashmap_free(m->dns_transactions); | |
576 | ||
096b6773 LP |
577 | sd_event_source_unref(m->network_event_source); |
578 | sd_network_monitor_unref(m->network_monitor); | |
091a364c | 579 | |
a564ca2f LP |
580 | sd_netlink_unref(m->rtnl); |
581 | sd_event_source_unref(m->rtnl_event_source); | |
582 | ||
edc501d4 | 583 | manager_llmnr_stop(m); |
bc7702b0 | 584 | manager_mdns_stop(m); |
623a4c97 | 585 | |
902bb5d8 | 586 | sd_bus_slot_unref(m->prepare_for_sleep_slot); |
74b2466e LP |
587 | sd_event_source_unref(m->bus_retry_event_source); |
588 | sd_bus_unref(m->bus); | |
091a364c | 589 | |
4d506d6b LP |
590 | sd_event_source_unref(m->sigusr1_event_source); |
591 | ||
74b2466e | 592 | sd_event_unref(m->event); |
623a4c97 | 593 | |
78c6a153 LP |
594 | dns_resource_key_unref(m->llmnr_host_ipv4_key); |
595 | dns_resource_key_unref(m->llmnr_host_ipv6_key); | |
eb60f9cd | 596 | |
eb60f9cd | 597 | sd_event_source_unref(m->hostname_event_source); |
d9fcf2ba | 598 | safe_close(m->hostname_fd); |
78c6a153 LP |
599 | free(m->llmnr_hostname); |
600 | free(m->mdns_hostname); | |
eb60f9cd | 601 | |
0d2cd476 | 602 | dns_trust_anchor_flush(&m->trust_anchor); |
dd0bc0f1 | 603 | manager_etc_hosts_flush(m); |
0d2cd476 | 604 | |
091a364c | 605 | free(m); |
74b2466e LP |
606 | |
607 | return NULL; | |
091a364c TG |
608 | } |
609 | ||
1716f6dc | 610 | int manager_recv(Manager *m, int fd, DnsProtocol protocol, DnsPacket **ret) { |
74b2466e | 611 | _cleanup_(dns_packet_unrefp) DnsPacket *p = NULL; |
1716f6dc LP |
612 | union { |
613 | struct cmsghdr header; /* For alignment */ | |
40a1eebd | 614 | uint8_t buffer[CMSG_SPACE(MAXSIZE(struct in_pktinfo, struct in6_pktinfo)) |
1716f6dc | 615 | + CMSG_SPACE(int) /* ttl/hoplimit */ |
623a4c97 | 616 | + EXTRA_CMSG_SPACE /* kernel appears to require extra buffer space */]; |
1716f6dc LP |
617 | } control; |
618 | union sockaddr_union sa; | |
74b2466e | 619 | struct msghdr mh = {}; |
1716f6dc | 620 | struct cmsghdr *cmsg; |
74b2466e | 621 | struct iovec iov; |
1716f6dc | 622 | int ms = 0, r; |
74b2466e LP |
623 | ssize_t l; |
624 | ||
625 | assert(m); | |
1716f6dc | 626 | assert(fd >= 0); |
74b2466e LP |
627 | assert(ret); |
628 | ||
74b2466e LP |
629 | r = ioctl(fd, FIONREAD, &ms); |
630 | if (r < 0) | |
631 | return -errno; | |
632 | if (ms < 0) | |
633 | return -EIO; | |
634 | ||
1716f6dc | 635 | r = dns_packet_new(&p, protocol, ms); |
74b2466e LP |
636 | if (r < 0) |
637 | return r; | |
638 | ||
639 | iov.iov_base = DNS_PACKET_DATA(p); | |
640 | iov.iov_len = p->allocated; | |
641 | ||
1716f6dc LP |
642 | mh.msg_name = &sa.sa; |
643 | mh.msg_namelen = sizeof(sa); | |
74b2466e LP |
644 | mh.msg_iov = &iov; |
645 | mh.msg_iovlen = 1; | |
1716f6dc LP |
646 | mh.msg_control = &control; |
647 | mh.msg_controllen = sizeof(control); | |
74b2466e | 648 | |
a38d9945 | 649 | l = recvmsg(fd, &mh, 0); |
74b2466e | 650 | if (l < 0) { |
ad867662 | 651 | if (errno == EAGAIN || errno == EINTR) |
74b2466e LP |
652 | return 0; |
653 | ||
654 | return -errno; | |
091a364c TG |
655 | } |
656 | ||
74b2466e LP |
657 | if (l <= 0) |
658 | return -EIO; | |
091a364c | 659 | |
1716f6dc LP |
660 | assert(!(mh.msg_flags & MSG_CTRUNC)); |
661 | assert(!(mh.msg_flags & MSG_TRUNC)); | |
662 | ||
74b2466e | 663 | p->size = (size_t) l; |
091a364c | 664 | |
1716f6dc | 665 | p->family = sa.sa.sa_family; |
623a4c97 LP |
666 | p->ipproto = IPPROTO_UDP; |
667 | if (p->family == AF_INET) { | |
1716f6dc | 668 | p->sender.in = sa.in.sin_addr; |
623a4c97 LP |
669 | p->sender_port = be16toh(sa.in.sin_port); |
670 | } else if (p->family == AF_INET6) { | |
1716f6dc | 671 | p->sender.in6 = sa.in6.sin6_addr; |
623a4c97 LP |
672 | p->sender_port = be16toh(sa.in6.sin6_port); |
673 | p->ifindex = sa.in6.sin6_scope_id; | |
674 | } else | |
1716f6dc | 675 | return -EAFNOSUPPORT; |
74b2466e | 676 | |
2a1288ff | 677 | CMSG_FOREACH(cmsg, &mh) { |
74b2466e | 678 | |
1716f6dc LP |
679 | if (cmsg->cmsg_level == IPPROTO_IPV6) { |
680 | assert(p->family == AF_INET6); | |
74b2466e | 681 | |
1716f6dc | 682 | switch (cmsg->cmsg_type) { |
74b2466e | 683 | |
1716f6dc LP |
684 | case IPV6_PKTINFO: { |
685 | struct in6_pktinfo *i = (struct in6_pktinfo*) CMSG_DATA(cmsg); | |
74b2466e | 686 | |
623a4c97 LP |
687 | if (p->ifindex <= 0) |
688 | p->ifindex = i->ipi6_ifindex; | |
689 | ||
1716f6dc LP |
690 | p->destination.in6 = i->ipi6_addr; |
691 | break; | |
692 | } | |
74b2466e | 693 | |
1716f6dc LP |
694 | case IPV6_HOPLIMIT: |
695 | p->ttl = *(int *) CMSG_DATA(cmsg); | |
696 | break; | |
74b2466e | 697 | |
1716f6dc LP |
698 | } |
699 | } else if (cmsg->cmsg_level == IPPROTO_IP) { | |
700 | assert(p->family == AF_INET); | |
74b2466e | 701 | |
1716f6dc | 702 | switch (cmsg->cmsg_type) { |
74b2466e | 703 | |
1716f6dc LP |
704 | case IP_PKTINFO: { |
705 | struct in_pktinfo *i = (struct in_pktinfo*) CMSG_DATA(cmsg); | |
091a364c | 706 | |
623a4c97 LP |
707 | if (p->ifindex <= 0) |
708 | p->ifindex = i->ipi_ifindex; | |
709 | ||
1716f6dc LP |
710 | p->destination.in = i->ipi_addr; |
711 | break; | |
712 | } | |
74b2466e | 713 | |
623a4c97 | 714 | case IP_TTL: |
1716f6dc LP |
715 | p->ttl = *(int *) CMSG_DATA(cmsg); |
716 | break; | |
717 | } | |
718 | } | |
719 | } | |
74b2466e | 720 | |
623a4c97 LP |
721 | /* The Linux kernel sets the interface index to the loopback |
722 | * device if the packet came from the local host since it | |
723 | * avoids the routing table in such a case. Let's unset the | |
724 | * interface index in such a case. */ | |
a5f03596 | 725 | if (p->ifindex == LOOPBACK_IFINDEX) |
623a4c97 LP |
726 | p->ifindex = 0; |
727 | ||
86ad4cd7 TG |
728 | if (protocol != DNS_PROTOCOL_DNS) { |
729 | /* If we don't know the interface index still, we look for the | |
730 | * first local interface with a matching address. Yuck! */ | |
731 | if (p->ifindex <= 0) | |
732 | p->ifindex = manager_find_ifindex(m, p->family, &p->destination); | |
733 | } | |
623a4c97 | 734 | |
74b2466e LP |
735 | *ret = p; |
736 | p = NULL; | |
737 | ||
738 | return 1; | |
739 | } | |
740 | ||
74b2466e LP |
741 | static int sendmsg_loop(int fd, struct msghdr *mh, int flags) { |
742 | int r; | |
743 | ||
744 | assert(fd >= 0); | |
745 | assert(mh); | |
746 | ||
747 | for (;;) { | |
748 | if (sendmsg(fd, mh, flags) >= 0) | |
749 | return 0; | |
750 | ||
751 | if (errno == EINTR) | |
752 | continue; | |
753 | ||
754 | if (errno != EAGAIN) | |
755 | return -errno; | |
756 | ||
757 | r = fd_wait_for_event(fd, POLLOUT, SEND_TIMEOUT_USEC); | |
758 | if (r < 0) | |
759 | return r; | |
760 | if (r == 0) | |
761 | return -ETIMEDOUT; | |
762 | } | |
763 | } | |
764 | ||
72290734 TG |
765 | static int write_loop(int fd, void *message, size_t length) { |
766 | int r; | |
767 | ||
768 | assert(fd >= 0); | |
769 | assert(message); | |
770 | ||
771 | for (;;) { | |
772 | if (write(fd, message, length) >= 0) | |
773 | return 0; | |
774 | ||
775 | if (errno == EINTR) | |
776 | continue; | |
777 | ||
778 | if (errno != EAGAIN) | |
779 | return -errno; | |
780 | ||
781 | r = fd_wait_for_event(fd, POLLOUT, SEND_TIMEOUT_USEC); | |
782 | if (r < 0) | |
783 | return r; | |
784 | if (r == 0) | |
785 | return -ETIMEDOUT; | |
786 | } | |
787 | } | |
788 | ||
789 | int manager_write(Manager *m, int fd, DnsPacket *p) { | |
790 | int r; | |
791 | ||
deb3f3d3 | 792 | log_debug("Sending %s packet with id %" PRIu16 ".", DNS_PACKET_QR(p) ? "response" : "query", DNS_PACKET_ID(p)); |
72290734 TG |
793 | |
794 | r = write_loop(fd, DNS_PACKET_DATA(p), p->size); | |
795 | if (r < 0) | |
796 | return r; | |
797 | ||
798 | return 0; | |
799 | } | |
800 | ||
623a4c97 | 801 | static int manager_ipv4_send(Manager *m, int fd, int ifindex, const struct in_addr *addr, uint16_t port, DnsPacket *p) { |
74b2466e LP |
802 | union sockaddr_union sa = { |
803 | .in.sin_family = AF_INET, | |
74b2466e | 804 | }; |
1716f6dc LP |
805 | union { |
806 | struct cmsghdr header; /* For alignment */ | |
807 | uint8_t buffer[CMSG_SPACE(sizeof(struct in_pktinfo))]; | |
808 | } control; | |
74b2466e LP |
809 | struct msghdr mh = {}; |
810 | struct iovec iov; | |
74b2466e LP |
811 | |
812 | assert(m); | |
1716f6dc LP |
813 | assert(fd >= 0); |
814 | assert(addr); | |
815 | assert(port > 0); | |
74b2466e LP |
816 | assert(p); |
817 | ||
74b2466e LP |
818 | iov.iov_base = DNS_PACKET_DATA(p); |
819 | iov.iov_len = p->size; | |
091a364c | 820 | |
1716f6dc LP |
821 | sa.in.sin_addr = *addr; |
822 | sa.in.sin_port = htobe16(port), | |
091a364c | 823 | |
74b2466e LP |
824 | mh.msg_iov = &iov; |
825 | mh.msg_iovlen = 1; | |
826 | mh.msg_name = &sa.sa; | |
827 | mh.msg_namelen = sizeof(sa.in); | |
091a364c | 828 | |
74b2466e LP |
829 | if (ifindex > 0) { |
830 | struct cmsghdr *cmsg; | |
831 | struct in_pktinfo *pi; | |
832 | ||
833 | zero(control); | |
834 | ||
1716f6dc | 835 | mh.msg_control = &control; |
74b2466e LP |
836 | mh.msg_controllen = CMSG_LEN(sizeof(struct in_pktinfo)); |
837 | ||
838 | cmsg = CMSG_FIRSTHDR(&mh); | |
839 | cmsg->cmsg_len = mh.msg_controllen; | |
840 | cmsg->cmsg_level = IPPROTO_IP; | |
841 | cmsg->cmsg_type = IP_PKTINFO; | |
842 | ||
843 | pi = (struct in_pktinfo*) CMSG_DATA(cmsg); | |
844 | pi->ipi_ifindex = ifindex; | |
845 | } | |
846 | ||
847 | return sendmsg_loop(fd, &mh, 0); | |
848 | } | |
849 | ||
623a4c97 | 850 | static int manager_ipv6_send(Manager *m, int fd, int ifindex, const struct in6_addr *addr, uint16_t port, DnsPacket *p) { |
74b2466e LP |
851 | union sockaddr_union sa = { |
852 | .in6.sin6_family = AF_INET6, | |
74b2466e | 853 | }; |
1716f6dc LP |
854 | union { |
855 | struct cmsghdr header; /* For alignment */ | |
856 | uint8_t buffer[CMSG_SPACE(sizeof(struct in6_pktinfo))]; | |
857 | } control; | |
74b2466e LP |
858 | struct msghdr mh = {}; |
859 | struct iovec iov; | |
74b2466e LP |
860 | |
861 | assert(m); | |
1716f6dc LP |
862 | assert(fd >= 0); |
863 | assert(addr); | |
864 | assert(port > 0); | |
74b2466e LP |
865 | assert(p); |
866 | ||
74b2466e LP |
867 | iov.iov_base = DNS_PACKET_DATA(p); |
868 | iov.iov_len = p->size; | |
869 | ||
1716f6dc LP |
870 | sa.in6.sin6_addr = *addr; |
871 | sa.in6.sin6_port = htobe16(port), | |
74b2466e LP |
872 | sa.in6.sin6_scope_id = ifindex; |
873 | ||
874 | mh.msg_iov = &iov; | |
875 | mh.msg_iovlen = 1; | |
876 | mh.msg_name = &sa.sa; | |
877 | mh.msg_namelen = sizeof(sa.in6); | |
878 | ||
879 | if (ifindex > 0) { | |
880 | struct cmsghdr *cmsg; | |
881 | struct in6_pktinfo *pi; | |
882 | ||
883 | zero(control); | |
884 | ||
1716f6dc | 885 | mh.msg_control = &control; |
74b2466e LP |
886 | mh.msg_controllen = CMSG_LEN(sizeof(struct in6_pktinfo)); |
887 | ||
888 | cmsg = CMSG_FIRSTHDR(&mh); | |
889 | cmsg->cmsg_len = mh.msg_controllen; | |
890 | cmsg->cmsg_level = IPPROTO_IPV6; | |
891 | cmsg->cmsg_type = IPV6_PKTINFO; | |
892 | ||
893 | pi = (struct in6_pktinfo*) CMSG_DATA(cmsg); | |
894 | pi->ipi6_ifindex = ifindex; | |
895 | } | |
896 | ||
897 | return sendmsg_loop(fd, &mh, 0); | |
898 | } | |
899 | ||
623a4c97 | 900 | int manager_send(Manager *m, int fd, int ifindex, int family, const union in_addr_union *addr, uint16_t port, DnsPacket *p) { |
1716f6dc LP |
901 | assert(m); |
902 | assert(fd >= 0); | |
903 | assert(addr); | |
904 | assert(port > 0); | |
905 | assert(p); | |
906 | ||
deb3f3d3 | 907 | 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 | 908 | |
1716f6dc LP |
909 | if (family == AF_INET) |
910 | return manager_ipv4_send(m, fd, ifindex, &addr->in, port, p); | |
911 | else if (family == AF_INET6) | |
912 | return manager_ipv6_send(m, fd, ifindex, &addr->in6, port, p); | |
913 | ||
914 | return -EAFNOSUPPORT; | |
915 | } | |
916 | ||
e1c95994 LP |
917 | uint32_t manager_find_mtu(Manager *m) { |
918 | uint32_t mtu = 0; | |
919 | Link *l; | |
920 | Iterator i; | |
921 | ||
922 | /* If we don't know on which link a DNS packet would be | |
923 | * delivered, let's find the largest MTU that works on all | |
924 | * interfaces we know of */ | |
925 | ||
926 | HASHMAP_FOREACH(l, m->links, i) { | |
927 | if (l->mtu <= 0) | |
928 | continue; | |
929 | ||
930 | if (mtu <= 0 || l->mtu < mtu) | |
931 | mtu = l->mtu; | |
932 | } | |
933 | ||
934 | return mtu; | |
935 | } | |
1716f6dc | 936 | |
623a4c97 | 937 | int manager_find_ifindex(Manager *m, int family, const union in_addr_union *in_addr) { |
ec2c5e43 LP |
938 | LinkAddress *a; |
939 | ||
940 | assert(m); | |
941 | ||
4e945a6f | 942 | a = manager_find_link_address(m, family, in_addr); |
ec2c5e43 LP |
943 | if (a) |
944 | return a->link->ifindex; | |
945 | ||
946 | return 0; | |
947 | } | |
948 | ||
eb60f9cd LP |
949 | void manager_refresh_rrs(Manager *m) { |
950 | Iterator i; | |
951 | Link *l; | |
952 | ||
953 | assert(m); | |
954 | ||
78c6a153 LP |
955 | m->llmnr_host_ipv4_key = dns_resource_key_unref(m->llmnr_host_ipv4_key); |
956 | m->llmnr_host_ipv6_key = dns_resource_key_unref(m->llmnr_host_ipv6_key); | |
eb60f9cd LP |
957 | |
958 | HASHMAP_FOREACH(l, m->links, i) { | |
959 | link_add_rrs(l, true); | |
960 | link_add_rrs(l, false); | |
961 | } | |
962 | } | |
963 | ||
ec2c5e43 LP |
964 | int manager_next_hostname(Manager *m) { |
965 | const char *p; | |
556a2294 | 966 | uint64_t u, a; |
78c6a153 LP |
967 | char *h, *k; |
968 | int r; | |
623a4c97 LP |
969 | |
970 | assert(m); | |
971 | ||
78c6a153 | 972 | p = strchr(m->llmnr_hostname, 0); |
ec2c5e43 LP |
973 | assert(p); |
974 | ||
78c6a153 | 975 | while (p > m->llmnr_hostname) { |
ec2c5e43 LP |
976 | if (!strchr("0123456789", p[-1])) |
977 | break; | |
978 | ||
979 | p--; | |
980 | } | |
981 | ||
982 | if (*p == 0 || safe_atou64(p, &u) < 0 || u <= 0) | |
983 | u = 1; | |
984 | ||
556a2294 LP |
985 | /* Add a random number to the old value. This way we can avoid |
986 | * that two hosts pick the same hostname, win on IPv4 and lose | |
987 | * on IPv6 (or vice versa), and pick the same hostname | |
988 | * replacement hostname, ad infinitum. We still want the | |
989 | * numbers to go up monotonically, hence we just add a random | |
990 | * value 1..10 */ | |
991 | ||
992 | random_bytes(&a, sizeof(a)); | |
993 | u += 1 + a % 10; | |
ec2c5e43 | 994 | |
78c6a153 | 995 | if (asprintf(&h, "%.*s%" PRIu64, (int) (p - m->llmnr_hostname), m->llmnr_hostname, u) < 0) |
ec2c5e43 LP |
996 | return -ENOMEM; |
997 | ||
78c6a153 LP |
998 | r = dns_name_concat(h, "local", &k); |
999 | if (r < 0) { | |
1000 | free(h); | |
1001 | return r; | |
1002 | } | |
1003 | ||
1004 | log_info("Hostname conflict, changing published hostname from '%s' to '%s'.", m->llmnr_hostname, h); | |
1005 | ||
1006 | free(m->llmnr_hostname); | |
1007 | m->llmnr_hostname = h; | |
ec2c5e43 | 1008 | |
78c6a153 LP |
1009 | free(m->mdns_hostname); |
1010 | m->mdns_hostname = k; | |
ec2c5e43 | 1011 | |
eb60f9cd | 1012 | manager_refresh_rrs(m); |
623a4c97 LP |
1013 | |
1014 | return 0; | |
1015 | } | |
ec2c5e43 | 1016 | |
4e945a6f | 1017 | LinkAddress* manager_find_link_address(Manager *m, int family, const union in_addr_union *in_addr) { |
ec2c5e43 LP |
1018 | Iterator i; |
1019 | Link *l; | |
1020 | ||
1021 | assert(m); | |
1022 | ||
1023 | HASHMAP_FOREACH(l, m->links, i) { | |
1024 | LinkAddress *a; | |
1025 | ||
1026 | a = link_find_address(l, family, in_addr); | |
1027 | if (a) | |
1028 | return a; | |
1029 | } | |
1030 | ||
1031 | return NULL; | |
1032 | } | |
1033 | ||
a4076574 | 1034 | bool manager_our_packet(Manager *m, DnsPacket *p) { |
ec2c5e43 LP |
1035 | assert(m); |
1036 | assert(p); | |
1037 | ||
4e945a6f | 1038 | return !!manager_find_link_address(m, p->family, &p->sender); |
ec2c5e43 | 1039 | } |
4e945a6f | 1040 | |
a4076574 LP |
1041 | DnsScope* manager_find_scope(Manager *m, DnsPacket *p) { |
1042 | Link *l; | |
1043 | ||
1044 | assert(m); | |
1045 | assert(p); | |
1046 | ||
1047 | l = hashmap_get(m->links, INT_TO_PTR(p->ifindex)); | |
1048 | if (!l) | |
1049 | return NULL; | |
1050 | ||
b4f1862d DM |
1051 | switch (p->protocol) { |
1052 | case DNS_PROTOCOL_LLMNR: | |
a4076574 LP |
1053 | if (p->family == AF_INET) |
1054 | return l->llmnr_ipv4_scope; | |
1055 | else if (p->family == AF_INET6) | |
1056 | return l->llmnr_ipv6_scope; | |
b4f1862d DM |
1057 | |
1058 | break; | |
1059 | ||
1060 | case DNS_PROTOCOL_MDNS: | |
1061 | if (p->family == AF_INET) | |
1062 | return l->mdns_ipv4_scope; | |
1063 | else if (p->family == AF_INET6) | |
1064 | return l->mdns_ipv6_scope; | |
1065 | ||
1066 | break; | |
1067 | ||
1068 | default: | |
1069 | break; | |
a4076574 LP |
1070 | } |
1071 | ||
1072 | return NULL; | |
1073 | } | |
1074 | ||
902bb5d8 LP |
1075 | void manager_verify_all(Manager *m) { |
1076 | DnsScope *s; | |
1077 | ||
1078 | assert(m); | |
1079 | ||
1080 | LIST_FOREACH(scopes, s, m->dns_scopes) | |
1081 | dns_zone_verify_all(&s->zone); | |
1082 | } | |
1083 | ||
78c6a153 | 1084 | int manager_is_own_hostname(Manager *m, const char *name) { |
78c6a153 LP |
1085 | int r; |
1086 | ||
1087 | assert(m); | |
1088 | assert(name); | |
1089 | ||
1090 | if (m->llmnr_hostname) { | |
1091 | r = dns_name_equal(name, m->llmnr_hostname); | |
1092 | if (r != 0) | |
1093 | return r; | |
1094 | } | |
1095 | ||
1096 | if (m->mdns_hostname) | |
1097 | return dns_name_equal(name, m->mdns_hostname); | |
1098 | ||
1099 | return 0; | |
1100 | } | |
1101 | ||
9176a57c LP |
1102 | int manager_compile_dns_servers(Manager *m, OrderedSet **dns) { |
1103 | DnsServer *s; | |
1104 | Iterator i; | |
1105 | Link *l; | |
1106 | int r; | |
1107 | ||
1108 | assert(m); | |
1109 | assert(dns); | |
1110 | ||
1111 | r = ordered_set_ensure_allocated(dns, &dns_server_hash_ops); | |
1112 | if (r < 0) | |
1113 | return r; | |
1114 | ||
1115 | /* First add the system-wide servers and domains */ | |
1116 | LIST_FOREACH(servers, s, m->dns_servers) { | |
1117 | r = ordered_set_put(*dns, s); | |
1118 | if (r == -EEXIST) | |
1119 | continue; | |
1120 | if (r < 0) | |
1121 | return r; | |
1122 | } | |
1123 | ||
1124 | /* Then, add the per-link servers */ | |
1125 | HASHMAP_FOREACH(l, m->links, i) { | |
1126 | LIST_FOREACH(servers, s, l->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 | /* If we found nothing, add the fallback servers */ | |
1136 | if (ordered_set_isempty(*dns)) { | |
1137 | LIST_FOREACH(servers, s, m->fallback_dns_servers) { | |
1138 | r = ordered_set_put(*dns, s); | |
1139 | if (r == -EEXIST) | |
1140 | continue; | |
1141 | if (r < 0) | |
1142 | return r; | |
1143 | } | |
1144 | } | |
1145 | ||
1146 | return 0; | |
1147 | } | |
1148 | ||
1149 | int manager_compile_search_domains(Manager *m, OrderedSet **domains) { | |
1150 | DnsSearchDomain *d; | |
1151 | Iterator i; | |
1152 | Link *l; | |
1153 | int r; | |
1154 | ||
1155 | assert(m); | |
1156 | assert(domains); | |
1157 | ||
1158 | r = ordered_set_ensure_allocated(domains, &dns_name_hash_ops); | |
1159 | if (r < 0) | |
1160 | return r; | |
1161 | ||
1162 | LIST_FOREACH(domains, d, m->search_domains) { | |
1163 | r = ordered_set_put(*domains, d->name); | |
1164 | if (r == -EEXIST) | |
1165 | continue; | |
1166 | if (r < 0) | |
1167 | return r; | |
1168 | } | |
1169 | ||
1170 | HASHMAP_FOREACH(l, m->links, i) { | |
1171 | ||
1172 | LIST_FOREACH(domains, d, l->search_domains) { | |
1173 | r = ordered_set_put(*domains, d->name); | |
1174 | if (r == -EEXIST) | |
1175 | continue; | |
1176 | if (r < 0) | |
1177 | return r; | |
1178 | } | |
1179 | } | |
1180 | ||
1181 | return 0; | |
1182 | } | |
c69fa7e3 LP |
1183 | |
1184 | DnssecMode manager_get_dnssec_mode(Manager *m) { | |
1185 | assert(m); | |
1186 | ||
1187 | if (m->dnssec_mode != _DNSSEC_MODE_INVALID) | |
1188 | return m->dnssec_mode; | |
1189 | ||
1190 | return DNSSEC_NO; | |
1191 | } | |
1192 | ||
1193 | bool manager_dnssec_supported(Manager *m) { | |
1194 | DnsServer *server; | |
1195 | Iterator i; | |
1196 | Link *l; | |
1197 | ||
1198 | assert(m); | |
1199 | ||
1200 | if (manager_get_dnssec_mode(m) == DNSSEC_NO) | |
1201 | return false; | |
1202 | ||
1203 | server = manager_get_dns_server(m); | |
1204 | if (server && !dns_server_dnssec_supported(server)) | |
1205 | return false; | |
1206 | ||
1207 | HASHMAP_FOREACH(l, m->links, i) | |
1208 | if (!link_dnssec_supported(l)) | |
1209 | return false; | |
1210 | ||
1211 | return true; | |
1212 | } | |
59c5b597 LP |
1213 | |
1214 | void manager_dnssec_verdict(Manager *m, DnssecVerdict verdict, const DnsResourceKey *key) { | |
1215 | ||
1216 | assert(verdict >= 0); | |
1217 | assert(verdict < _DNSSEC_VERDICT_MAX); | |
1218 | ||
1219 | if (log_get_max_level() >= LOG_DEBUG) { | |
1220 | _cleanup_free_ char *s = NULL; | |
1221 | ||
1222 | (void) dns_resource_key_to_string(key, &s); | |
1223 | ||
1224 | log_debug("Found verdict for lookup %s: %s", s ? strstrip(s) : "n/a", dnssec_verdict_to_string(verdict)); | |
1225 | } | |
1226 | ||
1227 | m->n_dnssec_verdict[verdict]++; | |
1228 | } |