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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" |
943ef07c | 26 | #include "dirent-util.h" |
07630cea | 27 | #include "dns-domain.h" |
3ffd4af2 | 28 | #include "fd-util.h" |
a5a807e6 | 29 | #include "fileio-label.h" |
07630cea | 30 | #include "hostname-util.h" |
c004493c | 31 | #include "io-util.h" |
07630cea LP |
32 | #include "netlink-util.h" |
33 | #include "network-internal.h" | |
822db23c | 34 | #include "ordered-set.h" |
6bedfcbb | 35 | #include "parse-util.h" |
3df3e884 | 36 | #include "random-util.h" |
39d8db04 | 37 | #include "resolved-bus.h" |
07630cea | 38 | #include "resolved-conf.h" |
b30bf55d | 39 | #include "resolved-dns-stub.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 | ||
943ef07c | 83 | r = link_process_rtnl(l, mm); |
74b2466e LP |
84 | if (r < 0) |
85 | goto fail; | |
86 | ||
943ef07c | 87 | r = link_update(l); |
21d73c87 LP |
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); |
943ef07c | 100 | link_remove_user(l); |
74b2466e LP |
101 | link_free(l); |
102 | } | |
103 | ||
104 | break; | |
105 | } | |
106 | ||
107 | return 0; | |
108 | ||
109 | fail: | |
da927ba9 | 110 | log_warning_errno(r, "Failed to process RTNL link message: %m"); |
74b2466e LP |
111 | return 0; |
112 | } | |
113 | ||
1c4baffc | 114 | static int manager_process_address(sd_netlink *rtnl, sd_netlink_message *mm, void *userdata) { |
74b2466e LP |
115 | Manager *m = userdata; |
116 | union in_addr_union address; | |
74b2466e | 117 | uint16_t type; |
0dd25fb9 | 118 | int r, ifindex, family; |
74b2466e LP |
119 | LinkAddress *a; |
120 | Link *l; | |
121 | ||
122 | assert(rtnl); | |
123 | assert(mm); | |
124 | assert(m); | |
125 | ||
1c4baffc | 126 | r = sd_netlink_message_get_type(mm, &type); |
74b2466e LP |
127 | if (r < 0) |
128 | goto fail; | |
129 | ||
130 | r = sd_rtnl_message_addr_get_ifindex(mm, &ifindex); | |
131 | if (r < 0) | |
132 | goto fail; | |
133 | ||
134 | l = hashmap_get(m->links, INT_TO_PTR(ifindex)); | |
135 | if (!l) | |
136 | return 0; | |
137 | ||
138 | r = sd_rtnl_message_addr_get_family(mm, &family); | |
139 | if (r < 0) | |
140 | goto fail; | |
141 | ||
142 | switch (family) { | |
143 | ||
144 | case AF_INET: | |
1c4baffc | 145 | r = sd_netlink_message_read_in_addr(mm, IFA_LOCAL, &address.in); |
74b2466e | 146 | if (r < 0) { |
1c4baffc | 147 | r = sd_netlink_message_read_in_addr(mm, IFA_ADDRESS, &address.in); |
74b2466e LP |
148 | if (r < 0) |
149 | goto fail; | |
150 | } | |
151 | ||
152 | break; | |
153 | ||
154 | case AF_INET6: | |
1c4baffc | 155 | r = sd_netlink_message_read_in6_addr(mm, IFA_LOCAL, &address.in6); |
74b2466e | 156 | if (r < 0) { |
1c4baffc | 157 | r = sd_netlink_message_read_in6_addr(mm, IFA_ADDRESS, &address.in6); |
74b2466e LP |
158 | if (r < 0) |
159 | goto fail; | |
160 | } | |
161 | ||
162 | break; | |
163 | ||
164 | default: | |
165 | return 0; | |
166 | } | |
167 | ||
168 | a = link_find_address(l, family, &address); | |
169 | ||
170 | switch (type) { | |
171 | ||
172 | case RTM_NEWADDR: | |
173 | ||
174 | if (!a) { | |
175 | r = link_address_new(l, &a, family, &address); | |
176 | if (r < 0) | |
177 | return r; | |
178 | } | |
179 | ||
180 | r = link_address_update_rtnl(a, mm); | |
181 | if (r < 0) | |
182 | return r; | |
183 | ||
184 | break; | |
185 | ||
186 | case RTM_DELADDR: | |
3e044c49 | 187 | link_address_free(a); |
74b2466e LP |
188 | break; |
189 | } | |
190 | ||
191 | return 0; | |
192 | ||
193 | fail: | |
da927ba9 | 194 | log_warning_errno(r, "Failed to process RTNL address message: %m"); |
74b2466e LP |
195 | return 0; |
196 | } | |
197 | ||
74b2466e | 198 | static int manager_rtnl_listen(Manager *m) { |
4afd3348 | 199 | _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL; |
1c4baffc | 200 | sd_netlink_message *i; |
74b2466e LP |
201 | int r; |
202 | ||
203 | assert(m); | |
204 | ||
cc98b302 | 205 | /* First, subscribe to interfaces coming and going */ |
1c4baffc | 206 | r = sd_netlink_open(&m->rtnl); |
74b2466e LP |
207 | if (r < 0) |
208 | return r; | |
209 | ||
2d895038 | 210 | r = sd_netlink_attach_event(m->rtnl, m->event, SD_EVENT_PRIORITY_IMPORTANT); |
74b2466e LP |
211 | if (r < 0) |
212 | return r; | |
213 | ||
1c4baffc | 214 | r = sd_netlink_add_match(m->rtnl, RTM_NEWLINK, manager_process_link, m); |
74b2466e LP |
215 | if (r < 0) |
216 | return r; | |
217 | ||
1c4baffc | 218 | r = sd_netlink_add_match(m->rtnl, RTM_DELLINK, manager_process_link, m); |
74b2466e LP |
219 | if (r < 0) |
220 | return r; | |
221 | ||
1c4baffc | 222 | r = sd_netlink_add_match(m->rtnl, RTM_NEWADDR, manager_process_address, m); |
74b2466e LP |
223 | if (r < 0) |
224 | return r; | |
091a364c | 225 | |
1c4baffc | 226 | r = sd_netlink_add_match(m->rtnl, RTM_DELADDR, manager_process_address, m); |
74b2466e LP |
227 | if (r < 0) |
228 | return r; | |
229 | ||
230 | /* Then, enumerate all links */ | |
231 | r = sd_rtnl_message_new_link(m->rtnl, &req, RTM_GETLINK, 0); | |
232 | if (r < 0) | |
233 | return r; | |
234 | ||
1c4baffc | 235 | r = sd_netlink_message_request_dump(req, true); |
74b2466e LP |
236 | if (r < 0) |
237 | return r; | |
238 | ||
1c4baffc | 239 | r = sd_netlink_call(m->rtnl, req, 0, &reply); |
74b2466e LP |
240 | if (r < 0) |
241 | return r; | |
242 | ||
1c4baffc | 243 | for (i = reply; i; i = sd_netlink_message_next(i)) { |
74b2466e LP |
244 | r = manager_process_link(m->rtnl, i, m); |
245 | if (r < 0) | |
246 | return r; | |
247 | } | |
248 | ||
1c4baffc TG |
249 | req = sd_netlink_message_unref(req); |
250 | reply = sd_netlink_message_unref(reply); | |
74b2466e LP |
251 | |
252 | /* Finally, enumerate all addresses, too */ | |
253 | r = sd_rtnl_message_new_addr(m->rtnl, &req, RTM_GETADDR, 0, AF_UNSPEC); | |
254 | if (r < 0) | |
255 | return r; | |
256 | ||
1c4baffc | 257 | r = sd_netlink_message_request_dump(req, true); |
74b2466e LP |
258 | if (r < 0) |
259 | return r; | |
260 | ||
1c4baffc | 261 | r = sd_netlink_call(m->rtnl, req, 0, &reply); |
74b2466e LP |
262 | if (r < 0) |
263 | return r; | |
264 | ||
1c4baffc | 265 | for (i = reply; i; i = sd_netlink_message_next(i)) { |
74b2466e LP |
266 | r = manager_process_address(m->rtnl, i, m); |
267 | if (r < 0) | |
268 | return r; | |
269 | } | |
270 | ||
271 | return r; | |
272 | } | |
273 | ||
274 | static int on_network_event(sd_event_source *s, int fd, uint32_t revents, void *userdata) { | |
275 | Manager *m = userdata; | |
276 | Iterator i; | |
277 | Link *l; | |
278 | int r; | |
279 | ||
280 | assert(m); | |
281 | ||
282 | sd_network_monitor_flush(m->network_monitor); | |
283 | ||
284 | HASHMAP_FOREACH(l, m->links, i) { | |
943ef07c | 285 | r = link_update(l); |
74b2466e | 286 | if (r < 0) |
da927ba9 | 287 | log_warning_errno(r, "Failed to update monitor information for %i: %m", l->ifindex); |
74b2466e LP |
288 | } |
289 | ||
7207052d | 290 | (void) manager_write_resolv_conf(m); |
74b2466e LP |
291 | |
292 | return 0; | |
293 | } | |
294 | ||
295 | static int manager_network_monitor_listen(Manager *m) { | |
296 | int r, fd, events; | |
297 | ||
298 | assert(m); | |
299 | ||
0014a4ad | 300 | r = sd_network_monitor_new(&m->network_monitor, NULL); |
74b2466e LP |
301 | if (r < 0) |
302 | return r; | |
303 | ||
304 | fd = sd_network_monitor_get_fd(m->network_monitor); | |
305 | if (fd < 0) | |
306 | return fd; | |
307 | ||
308 | events = sd_network_monitor_get_events(m->network_monitor); | |
309 | if (events < 0) | |
310 | return events; | |
311 | ||
312 | r = sd_event_add_io(m->event, &m->network_event_source, fd, events, &on_network_event, m); | |
313 | if (r < 0) | |
2d895038 LP |
314 | return r; |
315 | ||
316 | r = sd_event_source_set_priority(m->network_event_source, SD_EVENT_PRIORITY_IMPORTANT+5); | |
317 | if (r < 0) | |
74b2466e LP |
318 | return r; |
319 | ||
aa4a9deb LP |
320 | (void) sd_event_source_set_description(m->network_event_source, "network-monitor"); |
321 | ||
74b2466e LP |
322 | return 0; |
323 | } | |
324 | ||
78c6a153 | 325 | static int determine_hostname(char **llmnr_hostname, char **mdns_hostname) { |
eb60f9cd | 326 | _cleanup_free_ char *h = NULL, *n = NULL; |
78c6a153 LP |
327 | char label[DNS_LABEL_MAX]; |
328 | const char *p; | |
329 | int r, k; | |
eb60f9cd | 330 | |
78c6a153 LP |
331 | assert(llmnr_hostname); |
332 | assert(mdns_hostname); | |
333 | ||
334 | /* Extract and normalize the first label of the locally | |
335 | * configured hostname, and check it's not "localhost". */ | |
eb60f9cd LP |
336 | |
337 | h = gethostname_malloc(); | |
338 | if (!h) | |
339 | return log_oom(); | |
340 | ||
78c6a153 LP |
341 | p = h; |
342 | r = dns_label_unescape(&p, label, sizeof(label)); | |
343 | if (r < 0) | |
344 | return log_error_errno(r, "Failed to unescape host name: %m"); | |
345 | if (r == 0) { | |
346 | log_error("Couldn't find a single label in hosntame."); | |
347 | return -EINVAL; | |
348 | } | |
349 | ||
350 | k = dns_label_undo_idna(label, r, label, sizeof(label)); | |
351 | if (k < 0) | |
352 | return log_error_errno(k, "Failed to undo IDNA: %m"); | |
353 | if (k > 0) | |
354 | r = k; | |
355 | ||
356 | if (!utf8_is_valid(label)) { | |
eb60f9cd LP |
357 | log_error("System hostname is not UTF-8 clean."); |
358 | return -EINVAL; | |
359 | } | |
360 | ||
422baca0 | 361 | r = dns_label_escape_new(label, r, &n); |
78c6a153 LP |
362 | if (r < 0) |
363 | return log_error_errno(r, "Failed to escape host name: %m"); | |
364 | ||
365 | if (is_localhost(n)) { | |
366 | log_debug("System hostname is 'localhost', ignoring."); | |
367 | return -EINVAL; | |
eb60f9cd LP |
368 | } |
369 | ||
78c6a153 LP |
370 | r = dns_name_concat(n, "local", mdns_hostname); |
371 | if (r < 0) | |
372 | return log_error_errno(r, "Failed to determine mDNS hostname: %m"); | |
373 | ||
374 | *llmnr_hostname = n; | |
eb60f9cd LP |
375 | n = NULL; |
376 | ||
377 | return 0; | |
378 | } | |
379 | ||
380 | static int on_hostname_change(sd_event_source *es, int fd, uint32_t revents, void *userdata) { | |
78c6a153 | 381 | _cleanup_free_ char *llmnr_hostname = NULL, *mdns_hostname = NULL; |
eb60f9cd LP |
382 | Manager *m = userdata; |
383 | int r; | |
384 | ||
385 | assert(m); | |
386 | ||
78c6a153 | 387 | r = determine_hostname(&llmnr_hostname, &mdns_hostname); |
eb60f9cd LP |
388 | if (r < 0) |
389 | return 0; /* ignore invalid hostnames */ | |
390 | ||
78c6a153 | 391 | if (streq(llmnr_hostname, m->llmnr_hostname) && streq(mdns_hostname, m->mdns_hostname)) |
eb60f9cd LP |
392 | return 0; |
393 | ||
78c6a153 LP |
394 | log_info("System hostname changed to '%s'.", llmnr_hostname); |
395 | ||
396 | free(m->llmnr_hostname); | |
397 | free(m->mdns_hostname); | |
398 | ||
399 | m->llmnr_hostname = llmnr_hostname; | |
400 | m->mdns_hostname = mdns_hostname; | |
401 | ||
402 | llmnr_hostname = mdns_hostname = NULL; | |
eb60f9cd LP |
403 | |
404 | manager_refresh_rrs(m); | |
405 | ||
406 | return 0; | |
407 | } | |
408 | ||
409 | static int manager_watch_hostname(Manager *m) { | |
eb60f9cd LP |
410 | int r; |
411 | ||
412 | assert(m); | |
413 | ||
414 | m->hostname_fd = open("/proc/sys/kernel/hostname", O_RDONLY|O_CLOEXEC|O_NDELAY|O_NOCTTY); | |
415 | if (m->hostname_fd < 0) { | |
56f64d95 | 416 | log_warning_errno(errno, "Failed to watch hostname: %m"); |
eb60f9cd LP |
417 | return 0; |
418 | } | |
419 | ||
420 | r = sd_event_add_io(m->event, &m->hostname_event_source, m->hostname_fd, 0, on_hostname_change, m); | |
421 | if (r < 0) { | |
422 | if (r == -EPERM) | |
423 | /* kernels prior to 3.2 don't support polling this file. Ignore the failure. */ | |
424 | m->hostname_fd = safe_close(m->hostname_fd); | |
8d3d7072 MS |
425 | else |
426 | return log_error_errno(r, "Failed to add hostname event source: %m"); | |
eb60f9cd LP |
427 | } |
428 | ||
aa4a9deb LP |
429 | (void) sd_event_source_set_description(m->hostname_event_source, "hostname"); |
430 | ||
78c6a153 | 431 | r = determine_hostname(&m->llmnr_hostname, &m->mdns_hostname); |
eb60f9cd LP |
432 | if (r < 0) { |
433 | log_info("Defaulting to hostname 'linux'."); | |
78c6a153 LP |
434 | m->llmnr_hostname = strdup("linux"); |
435 | if (!m->llmnr_hostname) | |
436 | return log_oom(); | |
437 | ||
438 | m->mdns_hostname = strdup("linux.local"); | |
439 | if (!m->mdns_hostname) | |
eb60f9cd LP |
440 | return log_oom(); |
441 | } else | |
78c6a153 | 442 | log_info("Using system hostname '%s'.", m->llmnr_hostname); |
eb60f9cd LP |
443 | |
444 | return 0; | |
445 | } | |
446 | ||
4d506d6b LP |
447 | static int manager_sigusr1(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) { |
448 | _cleanup_free_ char *buffer = NULL; | |
449 | _cleanup_fclose_ FILE *f = NULL; | |
450 | Manager *m = userdata; | |
451 | size_t size = 0; | |
452 | DnsScope *scope; | |
453 | ||
454 | assert(s); | |
455 | assert(si); | |
456 | assert(m); | |
457 | ||
458 | f = open_memstream(&buffer, &size); | |
459 | if (!f) | |
460 | return log_oom(); | |
461 | ||
462 | LIST_FOREACH(scopes, scope, m->dns_scopes) | |
463 | dns_scope_dump(scope, f); | |
464 | ||
465 | if (fflush_and_check(f) < 0) | |
466 | return log_oom(); | |
467 | ||
468 | log_dump(LOG_INFO, buffer); | |
469 | return 0; | |
470 | } | |
471 | ||
bc81447e LP |
472 | static int manager_sigusr2(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) { |
473 | Manager *m = userdata; | |
bc81447e LP |
474 | |
475 | assert(s); | |
476 | assert(si); | |
477 | assert(m); | |
478 | ||
ba35662f | 479 | manager_flush_caches(m); |
ba35662f | 480 | |
bc81447e LP |
481 | return 0; |
482 | } | |
483 | ||
091a364c | 484 | int manager_new(Manager **ret) { |
74b2466e | 485 | _cleanup_(manager_freep) Manager *m = NULL; |
091a364c TG |
486 | int r; |
487 | ||
c92e531c LP |
488 | assert(ret); |
489 | ||
091a364c TG |
490 | m = new0(Manager, 1); |
491 | if (!m) | |
492 | return -ENOMEM; | |
493 | ||
1716f6dc | 494 | m->llmnr_ipv4_udp_fd = m->llmnr_ipv6_udp_fd = -1; |
623a4c97 | 495 | m->llmnr_ipv4_tcp_fd = m->llmnr_ipv6_tcp_fd = -1; |
bc7702b0 | 496 | m->mdns_ipv4_fd = m->mdns_ipv6_fd = -1; |
b30bf55d | 497 | m->dns_stub_udp_fd = m->dns_stub_tcp_fd = -1; |
eb60f9cd | 498 | m->hostname_fd = -1; |
1716f6dc | 499 | |
af49ca27 | 500 | m->llmnr_support = RESOLVE_SUPPORT_YES; |
ad6c0475 | 501 | m->mdns_support = RESOLVE_SUPPORT_NO; |
61ecb465 | 502 | m->dnssec_mode = DEFAULT_DNSSEC_MODE; |
ceeddf79 | 503 | m->enable_cache = true; |
1ae43295 | 504 | m->dns_stub_listener_mode = DNS_STUB_LISTENER_UDP; |
5cb36f41 | 505 | m->read_resolv_conf = true; |
00fa60ae | 506 | m->need_builtin_fallbacks = true; |
dd0bc0f1 | 507 | m->etc_hosts_last = m->etc_hosts_mtime = USEC_INFINITY; |
091a364c | 508 | |
0d2cd476 LP |
509 | r = dns_trust_anchor_load(&m->trust_anchor); |
510 | if (r < 0) | |
511 | return r; | |
512 | ||
ad6c0475 LP |
513 | r = manager_parse_config_file(m); |
514 | if (r < 0) | |
515 | return r; | |
516 | ||
091a364c TG |
517 | r = sd_event_default(&m->event); |
518 | if (r < 0) | |
519 | return r; | |
520 | ||
521 | sd_event_add_signal(m->event, NULL, SIGTERM, NULL, NULL); | |
522 | sd_event_add_signal(m->event, NULL, SIGINT, NULL, NULL); | |
523 | ||
524 | sd_event_set_watchdog(m->event, true); | |
525 | ||
eb60f9cd LP |
526 | r = manager_watch_hostname(m); |
527 | if (r < 0) | |
528 | return r; | |
529 | ||
1716f6dc | 530 | r = dns_scope_new(m, &m->unicast_scope, NULL, DNS_PROTOCOL_DNS, AF_UNSPEC); |
74b2466e LP |
531 | if (r < 0) |
532 | return r; | |
533 | ||
534 | r = manager_network_monitor_listen(m); | |
535 | if (r < 0) | |
536 | return r; | |
537 | ||
538 | r = manager_rtnl_listen(m); | |
539 | if (r < 0) | |
540 | return r; | |
541 | ||
542 | r = manager_connect_bus(m); | |
543 | if (r < 0) | |
544 | return r; | |
545 | ||
4d506d6b | 546 | (void) sd_event_add_signal(m->event, &m->sigusr1_event_source, SIGUSR1, manager_sigusr1, m); |
bc81447e | 547 | (void) sd_event_add_signal(m->event, &m->sigusr2_event_source, SIGUSR2, manager_sigusr2, m); |
4d506d6b | 548 | |
943ef07c LP |
549 | manager_cleanup_saved_user(m); |
550 | ||
091a364c TG |
551 | *ret = m; |
552 | m = NULL; | |
553 | ||
554 | return 0; | |
555 | } | |
556 | ||
edc501d4 LP |
557 | int manager_start(Manager *m) { |
558 | int r; | |
559 | ||
560 | assert(m); | |
561 | ||
b30bf55d LP |
562 | r = manager_dns_stub_start(m); |
563 | if (r < 0) | |
564 | return r; | |
565 | ||
edc501d4 LP |
566 | r = manager_llmnr_start(m); |
567 | if (r < 0) | |
568 | return r; | |
569 | ||
bc7702b0 DM |
570 | r = manager_mdns_start(m); |
571 | if (r < 0) | |
572 | return r; | |
573 | ||
edc501d4 LP |
574 | return 0; |
575 | } | |
576 | ||
74b2466e LP |
577 | Manager *manager_free(Manager *m) { |
578 | Link *l; | |
091a364c TG |
579 | |
580 | if (!m) | |
74b2466e LP |
581 | return NULL; |
582 | ||
4b95f179 LP |
583 | dns_server_unlink_all(m->dns_servers); |
584 | dns_server_unlink_all(m->fallback_dns_servers); | |
a51c1048 LP |
585 | dns_search_domain_unlink_all(m->search_domains); |
586 | ||
74b2466e LP |
587 | while ((l = hashmap_first(m->links))) |
588 | link_free(l); | |
f0e15467 LP |
589 | |
590 | while (m->dns_queries) | |
591 | dns_query_free(m->dns_queries); | |
74b2466e | 592 | |
cab5b059 LP |
593 | dns_scope_free(m->unicast_scope); |
594 | ||
b30bf55d LP |
595 | /* At this point only orphaned streams should remain. All others should have been freed already by their |
596 | * owners */ | |
597 | while (m->dns_streams) | |
598 | dns_stream_unref(m->dns_streams); | |
599 | ||
f0e15467 LP |
600 | hashmap_free(m->links); |
601 | hashmap_free(m->dns_transactions); | |
602 | ||
096b6773 LP |
603 | sd_event_source_unref(m->network_event_source); |
604 | sd_network_monitor_unref(m->network_monitor); | |
091a364c | 605 | |
a564ca2f LP |
606 | sd_netlink_unref(m->rtnl); |
607 | sd_event_source_unref(m->rtnl_event_source); | |
608 | ||
edc501d4 | 609 | manager_llmnr_stop(m); |
bc7702b0 | 610 | manager_mdns_stop(m); |
b30bf55d | 611 | manager_dns_stub_stop(m); |
623a4c97 | 612 | |
902bb5d8 | 613 | sd_bus_slot_unref(m->prepare_for_sleep_slot); |
74b2466e LP |
614 | sd_event_source_unref(m->bus_retry_event_source); |
615 | sd_bus_unref(m->bus); | |
091a364c | 616 | |
4d506d6b | 617 | sd_event_source_unref(m->sigusr1_event_source); |
bc81447e | 618 | sd_event_source_unref(m->sigusr2_event_source); |
4d506d6b | 619 | |
74b2466e | 620 | sd_event_unref(m->event); |
623a4c97 | 621 | |
78c6a153 LP |
622 | dns_resource_key_unref(m->llmnr_host_ipv4_key); |
623 | dns_resource_key_unref(m->llmnr_host_ipv6_key); | |
400cb36e DR |
624 | dns_resource_key_unref(m->mdns_host_ipv4_key); |
625 | dns_resource_key_unref(m->mdns_host_ipv6_key); | |
eb60f9cd | 626 | |
eb60f9cd | 627 | sd_event_source_unref(m->hostname_event_source); |
d9fcf2ba | 628 | safe_close(m->hostname_fd); |
78c6a153 LP |
629 | free(m->llmnr_hostname); |
630 | free(m->mdns_hostname); | |
eb60f9cd | 631 | |
0d2cd476 | 632 | dns_trust_anchor_flush(&m->trust_anchor); |
dd0bc0f1 | 633 | manager_etc_hosts_flush(m); |
0d2cd476 | 634 | |
6b430fdb | 635 | return mfree(m); |
091a364c TG |
636 | } |
637 | ||
1716f6dc | 638 | int manager_recv(Manager *m, int fd, DnsProtocol protocol, DnsPacket **ret) { |
74b2466e | 639 | _cleanup_(dns_packet_unrefp) DnsPacket *p = NULL; |
1716f6dc LP |
640 | union { |
641 | struct cmsghdr header; /* For alignment */ | |
40a1eebd | 642 | uint8_t buffer[CMSG_SPACE(MAXSIZE(struct in_pktinfo, struct in6_pktinfo)) |
1716f6dc | 643 | + CMSG_SPACE(int) /* ttl/hoplimit */ |
623a4c97 | 644 | + EXTRA_CMSG_SPACE /* kernel appears to require extra buffer space */]; |
1716f6dc LP |
645 | } control; |
646 | union sockaddr_union sa; | |
74b2466e | 647 | struct msghdr mh = {}; |
1716f6dc | 648 | struct cmsghdr *cmsg; |
74b2466e | 649 | struct iovec iov; |
4edc2c9b LP |
650 | ssize_t ms, l; |
651 | int r; | |
74b2466e LP |
652 | |
653 | assert(m); | |
1716f6dc | 654 | assert(fd >= 0); |
74b2466e LP |
655 | assert(ret); |
656 | ||
4edc2c9b | 657 | ms = next_datagram_size_fd(fd); |
74b2466e | 658 | if (ms < 0) |
4edc2c9b | 659 | return ms; |
74b2466e | 660 | |
1716f6dc | 661 | r = dns_packet_new(&p, protocol, ms); |
74b2466e LP |
662 | if (r < 0) |
663 | return r; | |
664 | ||
665 | iov.iov_base = DNS_PACKET_DATA(p); | |
666 | iov.iov_len = p->allocated; | |
667 | ||
1716f6dc LP |
668 | mh.msg_name = &sa.sa; |
669 | mh.msg_namelen = sizeof(sa); | |
74b2466e LP |
670 | mh.msg_iov = &iov; |
671 | mh.msg_iovlen = 1; | |
1716f6dc LP |
672 | mh.msg_control = &control; |
673 | mh.msg_controllen = sizeof(control); | |
74b2466e | 674 | |
a38d9945 | 675 | l = recvmsg(fd, &mh, 0); |
f134289a EV |
676 | if (l == 0) |
677 | return 0; | |
74b2466e | 678 | if (l < 0) { |
ad867662 | 679 | if (errno == EAGAIN || errno == EINTR) |
74b2466e LP |
680 | return 0; |
681 | ||
682 | return -errno; | |
091a364c TG |
683 | } |
684 | ||
1716f6dc LP |
685 | assert(!(mh.msg_flags & MSG_CTRUNC)); |
686 | assert(!(mh.msg_flags & MSG_TRUNC)); | |
687 | ||
74b2466e | 688 | p->size = (size_t) l; |
091a364c | 689 | |
1716f6dc | 690 | p->family = sa.sa.sa_family; |
623a4c97 LP |
691 | p->ipproto = IPPROTO_UDP; |
692 | if (p->family == AF_INET) { | |
1716f6dc | 693 | p->sender.in = sa.in.sin_addr; |
623a4c97 LP |
694 | p->sender_port = be16toh(sa.in.sin_port); |
695 | } else if (p->family == AF_INET6) { | |
1716f6dc | 696 | p->sender.in6 = sa.in6.sin6_addr; |
623a4c97 LP |
697 | p->sender_port = be16toh(sa.in6.sin6_port); |
698 | p->ifindex = sa.in6.sin6_scope_id; | |
699 | } else | |
1716f6dc | 700 | return -EAFNOSUPPORT; |
74b2466e | 701 | |
2a1288ff | 702 | CMSG_FOREACH(cmsg, &mh) { |
74b2466e | 703 | |
1716f6dc LP |
704 | if (cmsg->cmsg_level == IPPROTO_IPV6) { |
705 | assert(p->family == AF_INET6); | |
74b2466e | 706 | |
1716f6dc | 707 | switch (cmsg->cmsg_type) { |
74b2466e | 708 | |
1716f6dc LP |
709 | case IPV6_PKTINFO: { |
710 | struct in6_pktinfo *i = (struct in6_pktinfo*) CMSG_DATA(cmsg); | |
74b2466e | 711 | |
623a4c97 LP |
712 | if (p->ifindex <= 0) |
713 | p->ifindex = i->ipi6_ifindex; | |
714 | ||
1716f6dc LP |
715 | p->destination.in6 = i->ipi6_addr; |
716 | break; | |
717 | } | |
74b2466e | 718 | |
1716f6dc LP |
719 | case IPV6_HOPLIMIT: |
720 | p->ttl = *(int *) CMSG_DATA(cmsg); | |
721 | break; | |
74b2466e | 722 | |
1716f6dc LP |
723 | } |
724 | } else if (cmsg->cmsg_level == IPPROTO_IP) { | |
725 | assert(p->family == AF_INET); | |
74b2466e | 726 | |
1716f6dc | 727 | switch (cmsg->cmsg_type) { |
74b2466e | 728 | |
1716f6dc LP |
729 | case IP_PKTINFO: { |
730 | struct in_pktinfo *i = (struct in_pktinfo*) CMSG_DATA(cmsg); | |
091a364c | 731 | |
623a4c97 LP |
732 | if (p->ifindex <= 0) |
733 | p->ifindex = i->ipi_ifindex; | |
734 | ||
1716f6dc LP |
735 | p->destination.in = i->ipi_addr; |
736 | break; | |
737 | } | |
74b2466e | 738 | |
623a4c97 | 739 | case IP_TTL: |
1716f6dc LP |
740 | p->ttl = *(int *) CMSG_DATA(cmsg); |
741 | break; | |
742 | } | |
743 | } | |
744 | } | |
74b2466e | 745 | |
623a4c97 LP |
746 | /* The Linux kernel sets the interface index to the loopback |
747 | * device if the packet came from the local host since it | |
748 | * avoids the routing table in such a case. Let's unset the | |
749 | * interface index in such a case. */ | |
a5f03596 | 750 | if (p->ifindex == LOOPBACK_IFINDEX) |
623a4c97 LP |
751 | p->ifindex = 0; |
752 | ||
86ad4cd7 TG |
753 | if (protocol != DNS_PROTOCOL_DNS) { |
754 | /* If we don't know the interface index still, we look for the | |
755 | * first local interface with a matching address. Yuck! */ | |
756 | if (p->ifindex <= 0) | |
757 | p->ifindex = manager_find_ifindex(m, p->family, &p->destination); | |
758 | } | |
623a4c97 | 759 | |
74b2466e LP |
760 | *ret = p; |
761 | p = NULL; | |
762 | ||
763 | return 1; | |
764 | } | |
765 | ||
74b2466e LP |
766 | static int sendmsg_loop(int fd, struct msghdr *mh, int flags) { |
767 | int r; | |
768 | ||
769 | assert(fd >= 0); | |
770 | assert(mh); | |
771 | ||
772 | for (;;) { | |
773 | if (sendmsg(fd, mh, flags) >= 0) | |
774 | return 0; | |
775 | ||
776 | if (errno == EINTR) | |
777 | continue; | |
778 | ||
779 | if (errno != EAGAIN) | |
780 | return -errno; | |
781 | ||
782 | r = fd_wait_for_event(fd, POLLOUT, SEND_TIMEOUT_USEC); | |
783 | if (r < 0) | |
784 | return r; | |
785 | if (r == 0) | |
786 | return -ETIMEDOUT; | |
787 | } | |
788 | } | |
789 | ||
72290734 TG |
790 | static int write_loop(int fd, void *message, size_t length) { |
791 | int r; | |
792 | ||
793 | assert(fd >= 0); | |
794 | assert(message); | |
795 | ||
796 | for (;;) { | |
797 | if (write(fd, message, length) >= 0) | |
798 | return 0; | |
799 | ||
800 | if (errno == EINTR) | |
801 | continue; | |
802 | ||
803 | if (errno != EAGAIN) | |
804 | return -errno; | |
805 | ||
806 | r = fd_wait_for_event(fd, POLLOUT, SEND_TIMEOUT_USEC); | |
807 | if (r < 0) | |
808 | return r; | |
809 | if (r == 0) | |
810 | return -ETIMEDOUT; | |
811 | } | |
812 | } | |
813 | ||
814 | int manager_write(Manager *m, int fd, DnsPacket *p) { | |
815 | int r; | |
816 | ||
deb3f3d3 | 817 | log_debug("Sending %s packet with id %" PRIu16 ".", DNS_PACKET_QR(p) ? "response" : "query", DNS_PACKET_ID(p)); |
72290734 TG |
818 | |
819 | r = write_loop(fd, DNS_PACKET_DATA(p), p->size); | |
820 | if (r < 0) | |
821 | return r; | |
822 | ||
823 | return 0; | |
824 | } | |
825 | ||
b30bf55d LP |
826 | static int manager_ipv4_send( |
827 | Manager *m, | |
828 | int fd, | |
829 | int ifindex, | |
830 | const struct in_addr *destination, | |
831 | uint16_t port, | |
832 | const struct in_addr *source, | |
833 | DnsPacket *p) { | |
74b2466e LP |
834 | union sockaddr_union sa = { |
835 | .in.sin_family = AF_INET, | |
74b2466e | 836 | }; |
1716f6dc LP |
837 | union { |
838 | struct cmsghdr header; /* For alignment */ | |
839 | uint8_t buffer[CMSG_SPACE(sizeof(struct in_pktinfo))]; | |
840 | } control; | |
74b2466e LP |
841 | struct msghdr mh = {}; |
842 | struct iovec iov; | |
74b2466e LP |
843 | |
844 | assert(m); | |
1716f6dc | 845 | assert(fd >= 0); |
b30bf55d | 846 | assert(destination); |
1716f6dc | 847 | assert(port > 0); |
74b2466e LP |
848 | assert(p); |
849 | ||
74b2466e LP |
850 | iov.iov_base = DNS_PACKET_DATA(p); |
851 | iov.iov_len = p->size; | |
091a364c | 852 | |
b30bf55d | 853 | sa.in.sin_addr = *destination; |
1716f6dc | 854 | sa.in.sin_port = htobe16(port), |
091a364c | 855 | |
74b2466e LP |
856 | mh.msg_iov = &iov; |
857 | mh.msg_iovlen = 1; | |
858 | mh.msg_name = &sa.sa; | |
859 | mh.msg_namelen = sizeof(sa.in); | |
091a364c | 860 | |
74b2466e LP |
861 | if (ifindex > 0) { |
862 | struct cmsghdr *cmsg; | |
863 | struct in_pktinfo *pi; | |
864 | ||
865 | zero(control); | |
866 | ||
1716f6dc | 867 | mh.msg_control = &control; |
74b2466e LP |
868 | mh.msg_controllen = CMSG_LEN(sizeof(struct in_pktinfo)); |
869 | ||
870 | cmsg = CMSG_FIRSTHDR(&mh); | |
871 | cmsg->cmsg_len = mh.msg_controllen; | |
872 | cmsg->cmsg_level = IPPROTO_IP; | |
873 | cmsg->cmsg_type = IP_PKTINFO; | |
874 | ||
875 | pi = (struct in_pktinfo*) CMSG_DATA(cmsg); | |
876 | pi->ipi_ifindex = ifindex; | |
b30bf55d LP |
877 | |
878 | if (source) | |
879 | pi->ipi_spec_dst = *source; | |
74b2466e LP |
880 | } |
881 | ||
882 | return sendmsg_loop(fd, &mh, 0); | |
883 | } | |
884 | ||
b30bf55d LP |
885 | static int manager_ipv6_send( |
886 | Manager *m, | |
887 | int fd, | |
888 | int ifindex, | |
889 | const struct in6_addr *destination, | |
890 | uint16_t port, | |
891 | const struct in6_addr *source, | |
892 | DnsPacket *p) { | |
893 | ||
74b2466e LP |
894 | union sockaddr_union sa = { |
895 | .in6.sin6_family = AF_INET6, | |
74b2466e | 896 | }; |
1716f6dc LP |
897 | union { |
898 | struct cmsghdr header; /* For alignment */ | |
899 | uint8_t buffer[CMSG_SPACE(sizeof(struct in6_pktinfo))]; | |
900 | } control; | |
74b2466e LP |
901 | struct msghdr mh = {}; |
902 | struct iovec iov; | |
74b2466e LP |
903 | |
904 | assert(m); | |
1716f6dc | 905 | assert(fd >= 0); |
b30bf55d | 906 | assert(destination); |
1716f6dc | 907 | assert(port > 0); |
74b2466e LP |
908 | assert(p); |
909 | ||
74b2466e LP |
910 | iov.iov_base = DNS_PACKET_DATA(p); |
911 | iov.iov_len = p->size; | |
912 | ||
b30bf55d | 913 | sa.in6.sin6_addr = *destination; |
1716f6dc | 914 | sa.in6.sin6_port = htobe16(port), |
74b2466e LP |
915 | sa.in6.sin6_scope_id = ifindex; |
916 | ||
917 | mh.msg_iov = &iov; | |
918 | mh.msg_iovlen = 1; | |
919 | mh.msg_name = &sa.sa; | |
920 | mh.msg_namelen = sizeof(sa.in6); | |
921 | ||
922 | if (ifindex > 0) { | |
923 | struct cmsghdr *cmsg; | |
924 | struct in6_pktinfo *pi; | |
925 | ||
926 | zero(control); | |
927 | ||
1716f6dc | 928 | mh.msg_control = &control; |
74b2466e LP |
929 | mh.msg_controllen = CMSG_LEN(sizeof(struct in6_pktinfo)); |
930 | ||
931 | cmsg = CMSG_FIRSTHDR(&mh); | |
932 | cmsg->cmsg_len = mh.msg_controllen; | |
933 | cmsg->cmsg_level = IPPROTO_IPV6; | |
934 | cmsg->cmsg_type = IPV6_PKTINFO; | |
935 | ||
936 | pi = (struct in6_pktinfo*) CMSG_DATA(cmsg); | |
937 | pi->ipi6_ifindex = ifindex; | |
b30bf55d LP |
938 | |
939 | if (source) | |
940 | pi->ipi6_addr = *source; | |
74b2466e LP |
941 | } |
942 | ||
943 | return sendmsg_loop(fd, &mh, 0); | |
944 | } | |
945 | ||
b30bf55d LP |
946 | int manager_send( |
947 | Manager *m, | |
948 | int fd, | |
949 | int ifindex, | |
950 | int family, | |
951 | const union in_addr_union *destination, | |
952 | uint16_t port, | |
953 | const union in_addr_union *source, | |
954 | DnsPacket *p) { | |
955 | ||
1716f6dc LP |
956 | assert(m); |
957 | assert(fd >= 0); | |
b30bf55d | 958 | assert(destination); |
1716f6dc LP |
959 | assert(port > 0); |
960 | assert(p); | |
961 | ||
deb3f3d3 | 962 | 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 | 963 | |
1716f6dc | 964 | if (family == AF_INET) |
b30bf55d | 965 | return manager_ipv4_send(m, fd, ifindex, &destination->in, port, &source->in, p); |
2817157b | 966 | if (family == AF_INET6) |
b30bf55d | 967 | return manager_ipv6_send(m, fd, ifindex, &destination->in6, port, &source->in6, p); |
1716f6dc LP |
968 | |
969 | return -EAFNOSUPPORT; | |
970 | } | |
971 | ||
e1c95994 LP |
972 | uint32_t manager_find_mtu(Manager *m) { |
973 | uint32_t mtu = 0; | |
974 | Link *l; | |
975 | Iterator i; | |
976 | ||
977 | /* If we don't know on which link a DNS packet would be | |
978 | * delivered, let's find the largest MTU that works on all | |
979 | * interfaces we know of */ | |
980 | ||
981 | HASHMAP_FOREACH(l, m->links, i) { | |
982 | if (l->mtu <= 0) | |
983 | continue; | |
984 | ||
985 | if (mtu <= 0 || l->mtu < mtu) | |
986 | mtu = l->mtu; | |
987 | } | |
988 | ||
989 | return mtu; | |
990 | } | |
1716f6dc | 991 | |
623a4c97 | 992 | int manager_find_ifindex(Manager *m, int family, const union in_addr_union *in_addr) { |
ec2c5e43 LP |
993 | LinkAddress *a; |
994 | ||
995 | assert(m); | |
996 | ||
4e945a6f | 997 | a = manager_find_link_address(m, family, in_addr); |
ec2c5e43 LP |
998 | if (a) |
999 | return a->link->ifindex; | |
1000 | ||
1001 | return 0; | |
1002 | } | |
1003 | ||
eb60f9cd LP |
1004 | void manager_refresh_rrs(Manager *m) { |
1005 | Iterator i; | |
1006 | Link *l; | |
1007 | ||
1008 | assert(m); | |
1009 | ||
78c6a153 LP |
1010 | m->llmnr_host_ipv4_key = dns_resource_key_unref(m->llmnr_host_ipv4_key); |
1011 | m->llmnr_host_ipv6_key = dns_resource_key_unref(m->llmnr_host_ipv6_key); | |
400cb36e DR |
1012 | m->mdns_host_ipv4_key = dns_resource_key_unref(m->mdns_host_ipv4_key); |
1013 | m->mdns_host_ipv6_key = dns_resource_key_unref(m->mdns_host_ipv6_key); | |
eb60f9cd LP |
1014 | |
1015 | HASHMAP_FOREACH(l, m->links, i) { | |
1016 | link_add_rrs(l, true); | |
1017 | link_add_rrs(l, false); | |
1018 | } | |
1019 | } | |
1020 | ||
ec2c5e43 LP |
1021 | int manager_next_hostname(Manager *m) { |
1022 | const char *p; | |
556a2294 | 1023 | uint64_t u, a; |
78c6a153 LP |
1024 | char *h, *k; |
1025 | int r; | |
623a4c97 LP |
1026 | |
1027 | assert(m); | |
1028 | ||
78c6a153 | 1029 | p = strchr(m->llmnr_hostname, 0); |
ec2c5e43 LP |
1030 | assert(p); |
1031 | ||
78c6a153 | 1032 | while (p > m->llmnr_hostname) { |
ec2c5e43 LP |
1033 | if (!strchr("0123456789", p[-1])) |
1034 | break; | |
1035 | ||
1036 | p--; | |
1037 | } | |
1038 | ||
1039 | if (*p == 0 || safe_atou64(p, &u) < 0 || u <= 0) | |
1040 | u = 1; | |
1041 | ||
556a2294 LP |
1042 | /* Add a random number to the old value. This way we can avoid |
1043 | * that two hosts pick the same hostname, win on IPv4 and lose | |
1044 | * on IPv6 (or vice versa), and pick the same hostname | |
1045 | * replacement hostname, ad infinitum. We still want the | |
1046 | * numbers to go up monotonically, hence we just add a random | |
1047 | * value 1..10 */ | |
1048 | ||
1049 | random_bytes(&a, sizeof(a)); | |
1050 | u += 1 + a % 10; | |
ec2c5e43 | 1051 | |
78c6a153 | 1052 | if (asprintf(&h, "%.*s%" PRIu64, (int) (p - m->llmnr_hostname), m->llmnr_hostname, u) < 0) |
ec2c5e43 LP |
1053 | return -ENOMEM; |
1054 | ||
78c6a153 LP |
1055 | r = dns_name_concat(h, "local", &k); |
1056 | if (r < 0) { | |
1057 | free(h); | |
1058 | return r; | |
1059 | } | |
1060 | ||
1061 | log_info("Hostname conflict, changing published hostname from '%s' to '%s'.", m->llmnr_hostname, h); | |
1062 | ||
1063 | free(m->llmnr_hostname); | |
1064 | m->llmnr_hostname = h; | |
ec2c5e43 | 1065 | |
78c6a153 LP |
1066 | free(m->mdns_hostname); |
1067 | m->mdns_hostname = k; | |
ec2c5e43 | 1068 | |
eb60f9cd | 1069 | manager_refresh_rrs(m); |
623a4c97 LP |
1070 | |
1071 | return 0; | |
1072 | } | |
ec2c5e43 | 1073 | |
4e945a6f | 1074 | LinkAddress* manager_find_link_address(Manager *m, int family, const union in_addr_union *in_addr) { |
ec2c5e43 LP |
1075 | Iterator i; |
1076 | Link *l; | |
1077 | ||
1078 | assert(m); | |
1079 | ||
1080 | HASHMAP_FOREACH(l, m->links, i) { | |
1081 | LinkAddress *a; | |
1082 | ||
1083 | a = link_find_address(l, family, in_addr); | |
1084 | if (a) | |
1085 | return a; | |
1086 | } | |
1087 | ||
1088 | return NULL; | |
1089 | } | |
1090 | ||
a4076574 | 1091 | bool manager_our_packet(Manager *m, DnsPacket *p) { |
ec2c5e43 LP |
1092 | assert(m); |
1093 | assert(p); | |
1094 | ||
4e945a6f | 1095 | return !!manager_find_link_address(m, p->family, &p->sender); |
ec2c5e43 | 1096 | } |
4e945a6f | 1097 | |
a4076574 LP |
1098 | DnsScope* manager_find_scope(Manager *m, DnsPacket *p) { |
1099 | Link *l; | |
1100 | ||
1101 | assert(m); | |
1102 | assert(p); | |
1103 | ||
1104 | l = hashmap_get(m->links, INT_TO_PTR(p->ifindex)); | |
1105 | if (!l) | |
1106 | return NULL; | |
1107 | ||
b4f1862d DM |
1108 | switch (p->protocol) { |
1109 | case DNS_PROTOCOL_LLMNR: | |
a4076574 LP |
1110 | if (p->family == AF_INET) |
1111 | return l->llmnr_ipv4_scope; | |
1112 | else if (p->family == AF_INET6) | |
1113 | return l->llmnr_ipv6_scope; | |
b4f1862d DM |
1114 | |
1115 | break; | |
1116 | ||
1117 | case DNS_PROTOCOL_MDNS: | |
1118 | if (p->family == AF_INET) | |
1119 | return l->mdns_ipv4_scope; | |
1120 | else if (p->family == AF_INET6) | |
1121 | return l->mdns_ipv6_scope; | |
1122 | ||
1123 | break; | |
1124 | ||
1125 | default: | |
1126 | break; | |
a4076574 LP |
1127 | } |
1128 | ||
1129 | return NULL; | |
1130 | } | |
1131 | ||
902bb5d8 LP |
1132 | void manager_verify_all(Manager *m) { |
1133 | DnsScope *s; | |
1134 | ||
1135 | assert(m); | |
1136 | ||
1137 | LIST_FOREACH(scopes, s, m->dns_scopes) | |
1138 | dns_zone_verify_all(&s->zone); | |
1139 | } | |
1140 | ||
78c6a153 | 1141 | int manager_is_own_hostname(Manager *m, const char *name) { |
78c6a153 LP |
1142 | int r; |
1143 | ||
1144 | assert(m); | |
1145 | assert(name); | |
1146 | ||
1147 | if (m->llmnr_hostname) { | |
1148 | r = dns_name_equal(name, m->llmnr_hostname); | |
1149 | if (r != 0) | |
1150 | return r; | |
1151 | } | |
1152 | ||
1153 | if (m->mdns_hostname) | |
1154 | return dns_name_equal(name, m->mdns_hostname); | |
1155 | ||
1156 | return 0; | |
1157 | } | |
1158 | ||
9176a57c LP |
1159 | int manager_compile_dns_servers(Manager *m, OrderedSet **dns) { |
1160 | DnsServer *s; | |
1161 | Iterator i; | |
1162 | Link *l; | |
1163 | int r; | |
1164 | ||
1165 | assert(m); | |
1166 | assert(dns); | |
1167 | ||
1168 | r = ordered_set_ensure_allocated(dns, &dns_server_hash_ops); | |
1169 | if (r < 0) | |
1170 | return r; | |
1171 | ||
1172 | /* First add the system-wide servers and domains */ | |
1173 | LIST_FOREACH(servers, s, m->dns_servers) { | |
1174 | r = ordered_set_put(*dns, s); | |
1175 | if (r == -EEXIST) | |
1176 | continue; | |
1177 | if (r < 0) | |
1178 | return r; | |
1179 | } | |
1180 | ||
1181 | /* Then, add the per-link servers */ | |
1182 | HASHMAP_FOREACH(l, m->links, i) { | |
1183 | LIST_FOREACH(servers, s, l->dns_servers) { | |
1184 | r = ordered_set_put(*dns, s); | |
1185 | if (r == -EEXIST) | |
1186 | continue; | |
1187 | if (r < 0) | |
1188 | return r; | |
1189 | } | |
1190 | } | |
1191 | ||
1192 | /* If we found nothing, add the fallback servers */ | |
1193 | if (ordered_set_isempty(*dns)) { | |
1194 | LIST_FOREACH(servers, s, m->fallback_dns_servers) { | |
1195 | r = ordered_set_put(*dns, s); | |
1196 | if (r == -EEXIST) | |
1197 | continue; | |
1198 | if (r < 0) | |
1199 | return r; | |
1200 | } | |
1201 | } | |
1202 | ||
1203 | return 0; | |
1204 | } | |
1205 | ||
94363cbb MP |
1206 | /* filter_route is a tri-state: |
1207 | * < 0: no filtering | |
1208 | * = 0 or false: return only domains which should be used for searching | |
1209 | * > 0 or true: return only domains which are for routing only | |
1210 | */ | |
6f7da49d | 1211 | int manager_compile_search_domains(Manager *m, OrderedSet **domains, int filter_route) { |
9176a57c LP |
1212 | DnsSearchDomain *d; |
1213 | Iterator i; | |
1214 | Link *l; | |
1215 | int r; | |
1216 | ||
1217 | assert(m); | |
1218 | assert(domains); | |
1219 | ||
1220 | r = ordered_set_ensure_allocated(domains, &dns_name_hash_ops); | |
1221 | if (r < 0) | |
1222 | return r; | |
1223 | ||
1224 | LIST_FOREACH(domains, d, m->search_domains) { | |
6f7da49d LP |
1225 | |
1226 | if (filter_route >= 0 && | |
1227 | d->route_only != !!filter_route) | |
1228 | continue; | |
1229 | ||
9176a57c LP |
1230 | r = ordered_set_put(*domains, d->name); |
1231 | if (r == -EEXIST) | |
1232 | continue; | |
1233 | if (r < 0) | |
1234 | return r; | |
1235 | } | |
1236 | ||
1237 | HASHMAP_FOREACH(l, m->links, i) { | |
1238 | ||
1239 | LIST_FOREACH(domains, d, l->search_domains) { | |
6f7da49d LP |
1240 | |
1241 | if (filter_route >= 0 && | |
1242 | d->route_only != !!filter_route) | |
1243 | continue; | |
1244 | ||
9176a57c LP |
1245 | r = ordered_set_put(*domains, d->name); |
1246 | if (r == -EEXIST) | |
1247 | continue; | |
1248 | if (r < 0) | |
1249 | return r; | |
1250 | } | |
1251 | } | |
1252 | ||
1253 | return 0; | |
1254 | } | |
c69fa7e3 LP |
1255 | |
1256 | DnssecMode manager_get_dnssec_mode(Manager *m) { | |
1257 | assert(m); | |
1258 | ||
1259 | if (m->dnssec_mode != _DNSSEC_MODE_INVALID) | |
1260 | return m->dnssec_mode; | |
1261 | ||
1262 | return DNSSEC_NO; | |
1263 | } | |
1264 | ||
1265 | bool manager_dnssec_supported(Manager *m) { | |
1266 | DnsServer *server; | |
1267 | Iterator i; | |
1268 | Link *l; | |
1269 | ||
1270 | assert(m); | |
1271 | ||
1272 | if (manager_get_dnssec_mode(m) == DNSSEC_NO) | |
1273 | return false; | |
1274 | ||
1275 | server = manager_get_dns_server(m); | |
1276 | if (server && !dns_server_dnssec_supported(server)) | |
1277 | return false; | |
1278 | ||
1279 | HASHMAP_FOREACH(l, m->links, i) | |
1280 | if (!link_dnssec_supported(l)) | |
1281 | return false; | |
1282 | ||
1283 | return true; | |
1284 | } | |
59c5b597 LP |
1285 | |
1286 | void manager_dnssec_verdict(Manager *m, DnssecVerdict verdict, const DnsResourceKey *key) { | |
1287 | ||
1288 | assert(verdict >= 0); | |
1289 | assert(verdict < _DNSSEC_VERDICT_MAX); | |
1290 | ||
1291 | if (log_get_max_level() >= LOG_DEBUG) { | |
202b76ae | 1292 | char s[DNS_RESOURCE_KEY_STRING_MAX]; |
59c5b597 | 1293 | |
202b76ae ZJS |
1294 | log_debug("Found verdict for lookup %s: %s", |
1295 | dns_resource_key_to_string(key, s, sizeof s), | |
1296 | dnssec_verdict_to_string(verdict)); | |
59c5b597 LP |
1297 | } |
1298 | ||
1299 | m->n_dnssec_verdict[verdict]++; | |
1300 | } | |
011696f7 LP |
1301 | |
1302 | bool manager_routable(Manager *m, int family) { | |
1303 | Iterator i; | |
1304 | Link *l; | |
1305 | ||
1306 | assert(m); | |
1307 | ||
1308 | /* Returns true if the host has at least one interface with a routable address of the specified type */ | |
1309 | ||
1310 | HASHMAP_FOREACH(l, m->links, i) | |
1311 | if (link_relevant(l, family, false)) | |
1312 | return true; | |
1313 | ||
1314 | return false; | |
1315 | } | |
ba35662f LP |
1316 | |
1317 | void manager_flush_caches(Manager *m) { | |
1318 | DnsScope *scope; | |
1319 | ||
1320 | assert(m); | |
1321 | ||
1322 | LIST_FOREACH(scopes, scope, m->dns_scopes) | |
1323 | dns_cache_flush(&scope->cache); | |
aac57b35 ZJS |
1324 | |
1325 | log_info("Flushed all caches."); | |
ba35662f | 1326 | } |
943ef07c LP |
1327 | |
1328 | void manager_cleanup_saved_user(Manager *m) { | |
1329 | _cleanup_closedir_ DIR *d = NULL; | |
1330 | struct dirent *de; | |
1331 | int r; | |
1332 | ||
1333 | assert(m); | |
1334 | ||
1335 | /* Clean up all saved per-link files in /run/systemd/resolve/netif/ that don't have a matching interface | |
1336 | * anymore. These files are created to persist settings pushed in by the user via the bus, so that resolved can | |
1337 | * be restarted without losing this data. */ | |
1338 | ||
1339 | d = opendir("/run/systemd/resolve/netif/"); | |
1340 | if (!d) { | |
1341 | if (errno == ENOENT) | |
1342 | return; | |
1343 | ||
1344 | log_warning_errno(errno, "Failed to open interface directory: %m"); | |
1345 | return; | |
1346 | } | |
1347 | ||
1348 | FOREACH_DIRENT_ALL(de, d, log_error_errno(errno, "Failed to read interface directory: %m")) { | |
1349 | _cleanup_free_ char *p = NULL; | |
1350 | int ifindex; | |
1351 | Link *l; | |
1352 | ||
1353 | if (!IN_SET(de->d_type, DT_UNKNOWN, DT_REG)) | |
1354 | continue; | |
1355 | ||
1356 | if (STR_IN_SET(de->d_name, ".", "..")) | |
1357 | continue; | |
1358 | ||
1359 | r = parse_ifindex(de->d_name, &ifindex); | |
1360 | if (r < 0) /* Probably some temporary file from a previous run. Delete it */ | |
1361 | goto rm; | |
1362 | ||
1363 | l = hashmap_get(m->links, INT_TO_PTR(ifindex)); | |
1364 | if (!l) /* link vanished */ | |
1365 | goto rm; | |
1366 | ||
1367 | if (l->is_managed) /* now managed by networkd, hence the bus settings are useless */ | |
1368 | goto rm; | |
1369 | ||
1370 | continue; | |
1371 | ||
1372 | rm: | |
1373 | p = strappend("/run/systemd/resolve/netif/", de->d_name); | |
1374 | if (!p) { | |
1375 | log_oom(); | |
1376 | return; | |
1377 | } | |
1378 | ||
1379 | (void) unlink(p); | |
1380 | } | |
1381 | } |