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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 | ||
e96de0ce | 325 | static int determine_hostname(char **full_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 | |
e96de0ce | 331 | assert(full_hostname); |
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 | ||
e96de0ce LP |
378 | *full_hostname = h; |
379 | h = NULL; | |
380 | ||
eb60f9cd LP |
381 | return 0; |
382 | } | |
383 | ||
384 | static int on_hostname_change(sd_event_source *es, int fd, uint32_t revents, void *userdata) { | |
e96de0ce | 385 | _cleanup_free_ char *full_hostname = NULL, *llmnr_hostname = NULL, *mdns_hostname = NULL; |
eb60f9cd LP |
386 | Manager *m = userdata; |
387 | int r; | |
388 | ||
389 | assert(m); | |
390 | ||
e96de0ce | 391 | r = determine_hostname(&full_hostname, &llmnr_hostname, &mdns_hostname); |
eb60f9cd LP |
392 | if (r < 0) |
393 | return 0; /* ignore invalid hostnames */ | |
394 | ||
e96de0ce LP |
395 | if (streq(full_hostname, m->full_hostname) && |
396 | streq(llmnr_hostname, m->llmnr_hostname) && | |
397 | streq(mdns_hostname, m->mdns_hostname)) | |
eb60f9cd LP |
398 | return 0; |
399 | ||
e96de0ce | 400 | log_info("System hostname changed to '%s'.", full_hostname); |
78c6a153 | 401 | |
e96de0ce LP |
402 | free_and_replace(m->full_hostname, full_hostname); |
403 | free_and_replace(m->llmnr_hostname, llmnr_hostname); | |
404 | free_and_replace(m->mdns_hostname, mdns_hostname); | |
eb60f9cd LP |
405 | |
406 | manager_refresh_rrs(m); | |
407 | ||
408 | return 0; | |
409 | } | |
410 | ||
411 | static int manager_watch_hostname(Manager *m) { | |
eb60f9cd LP |
412 | int r; |
413 | ||
414 | assert(m); | |
415 | ||
416 | m->hostname_fd = open("/proc/sys/kernel/hostname", O_RDONLY|O_CLOEXEC|O_NDELAY|O_NOCTTY); | |
417 | if (m->hostname_fd < 0) { | |
56f64d95 | 418 | log_warning_errno(errno, "Failed to watch hostname: %m"); |
eb60f9cd LP |
419 | return 0; |
420 | } | |
421 | ||
422 | r = sd_event_add_io(m->event, &m->hostname_event_source, m->hostname_fd, 0, on_hostname_change, m); | |
423 | if (r < 0) { | |
424 | if (r == -EPERM) | |
425 | /* kernels prior to 3.2 don't support polling this file. Ignore the failure. */ | |
426 | m->hostname_fd = safe_close(m->hostname_fd); | |
8d3d7072 MS |
427 | else |
428 | return log_error_errno(r, "Failed to add hostname event source: %m"); | |
eb60f9cd LP |
429 | } |
430 | ||
aa4a9deb LP |
431 | (void) sd_event_source_set_description(m->hostname_event_source, "hostname"); |
432 | ||
e96de0ce | 433 | r = determine_hostname(&m->full_hostname, &m->llmnr_hostname, &m->mdns_hostname); |
eb60f9cd LP |
434 | if (r < 0) { |
435 | log_info("Defaulting to hostname 'linux'."); | |
e96de0ce LP |
436 | |
437 | m->full_hostname = strdup("linux"); | |
438 | if (!m->full_hostname) | |
439 | return log_oom(); | |
440 | ||
78c6a153 LP |
441 | m->llmnr_hostname = strdup("linux"); |
442 | if (!m->llmnr_hostname) | |
443 | return log_oom(); | |
444 | ||
445 | m->mdns_hostname = strdup("linux.local"); | |
446 | if (!m->mdns_hostname) | |
eb60f9cd LP |
447 | return log_oom(); |
448 | } else | |
e96de0ce | 449 | log_info("Using system hostname '%s'.", m->full_hostname); |
eb60f9cd LP |
450 | |
451 | return 0; | |
452 | } | |
453 | ||
4d506d6b LP |
454 | static int manager_sigusr1(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) { |
455 | _cleanup_free_ char *buffer = NULL; | |
456 | _cleanup_fclose_ FILE *f = NULL; | |
457 | Manager *m = userdata; | |
458 | size_t size = 0; | |
459 | DnsScope *scope; | |
460 | ||
461 | assert(s); | |
462 | assert(si); | |
463 | assert(m); | |
464 | ||
465 | f = open_memstream(&buffer, &size); | |
466 | if (!f) | |
467 | return log_oom(); | |
468 | ||
469 | LIST_FOREACH(scopes, scope, m->dns_scopes) | |
470 | dns_scope_dump(scope, f); | |
471 | ||
472 | if (fflush_and_check(f) < 0) | |
473 | return log_oom(); | |
474 | ||
475 | log_dump(LOG_INFO, buffer); | |
476 | return 0; | |
477 | } | |
478 | ||
bc81447e LP |
479 | static int manager_sigusr2(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) { |
480 | Manager *m = userdata; | |
bc81447e LP |
481 | |
482 | assert(s); | |
483 | assert(si); | |
484 | assert(m); | |
485 | ||
ba35662f | 486 | manager_flush_caches(m); |
ba35662f | 487 | |
bc81447e LP |
488 | return 0; |
489 | } | |
490 | ||
091a364c | 491 | int manager_new(Manager **ret) { |
74b2466e | 492 | _cleanup_(manager_freep) Manager *m = NULL; |
091a364c TG |
493 | int r; |
494 | ||
c92e531c LP |
495 | assert(ret); |
496 | ||
091a364c TG |
497 | m = new0(Manager, 1); |
498 | if (!m) | |
499 | return -ENOMEM; | |
500 | ||
1716f6dc | 501 | m->llmnr_ipv4_udp_fd = m->llmnr_ipv6_udp_fd = -1; |
623a4c97 | 502 | m->llmnr_ipv4_tcp_fd = m->llmnr_ipv6_tcp_fd = -1; |
bc7702b0 | 503 | m->mdns_ipv4_fd = m->mdns_ipv6_fd = -1; |
b30bf55d | 504 | m->dns_stub_udp_fd = m->dns_stub_tcp_fd = -1; |
eb60f9cd | 505 | m->hostname_fd = -1; |
1716f6dc | 506 | |
af49ca27 | 507 | m->llmnr_support = RESOLVE_SUPPORT_YES; |
7bef8e8e | 508 | m->mdns_support = RESOLVE_SUPPORT_YES; |
61ecb465 | 509 | m->dnssec_mode = DEFAULT_DNSSEC_MODE; |
ceeddf79 | 510 | m->enable_cache = true; |
1ae43295 | 511 | m->dns_stub_listener_mode = DNS_STUB_LISTENER_UDP; |
5cb36f41 | 512 | m->read_resolv_conf = true; |
00fa60ae | 513 | m->need_builtin_fallbacks = true; |
dd0bc0f1 | 514 | m->etc_hosts_last = m->etc_hosts_mtime = USEC_INFINITY; |
091a364c | 515 | |
0d2cd476 LP |
516 | r = dns_trust_anchor_load(&m->trust_anchor); |
517 | if (r < 0) | |
518 | return r; | |
519 | ||
ad6c0475 LP |
520 | r = manager_parse_config_file(m); |
521 | if (r < 0) | |
522 | return r; | |
523 | ||
091a364c TG |
524 | r = sd_event_default(&m->event); |
525 | if (r < 0) | |
526 | return r; | |
527 | ||
528 | sd_event_add_signal(m->event, NULL, SIGTERM, NULL, NULL); | |
529 | sd_event_add_signal(m->event, NULL, SIGINT, NULL, NULL); | |
530 | ||
531 | sd_event_set_watchdog(m->event, true); | |
532 | ||
eb60f9cd LP |
533 | r = manager_watch_hostname(m); |
534 | if (r < 0) | |
535 | return r; | |
536 | ||
1716f6dc | 537 | r = dns_scope_new(m, &m->unicast_scope, NULL, DNS_PROTOCOL_DNS, AF_UNSPEC); |
74b2466e LP |
538 | if (r < 0) |
539 | return r; | |
540 | ||
541 | r = manager_network_monitor_listen(m); | |
542 | if (r < 0) | |
543 | return r; | |
544 | ||
545 | r = manager_rtnl_listen(m); | |
546 | if (r < 0) | |
547 | return r; | |
548 | ||
549 | r = manager_connect_bus(m); | |
550 | if (r < 0) | |
551 | return r; | |
552 | ||
4d506d6b | 553 | (void) sd_event_add_signal(m->event, &m->sigusr1_event_source, SIGUSR1, manager_sigusr1, m); |
bc81447e | 554 | (void) sd_event_add_signal(m->event, &m->sigusr2_event_source, SIGUSR2, manager_sigusr2, m); |
4d506d6b | 555 | |
943ef07c LP |
556 | manager_cleanup_saved_user(m); |
557 | ||
091a364c TG |
558 | *ret = m; |
559 | m = NULL; | |
560 | ||
561 | return 0; | |
562 | } | |
563 | ||
edc501d4 LP |
564 | int manager_start(Manager *m) { |
565 | int r; | |
566 | ||
567 | assert(m); | |
568 | ||
b30bf55d LP |
569 | r = manager_dns_stub_start(m); |
570 | if (r < 0) | |
571 | return r; | |
572 | ||
edc501d4 LP |
573 | r = manager_llmnr_start(m); |
574 | if (r < 0) | |
575 | return r; | |
576 | ||
bc7702b0 DM |
577 | r = manager_mdns_start(m); |
578 | if (r < 0) | |
579 | return r; | |
580 | ||
edc501d4 LP |
581 | return 0; |
582 | } | |
583 | ||
74b2466e LP |
584 | Manager *manager_free(Manager *m) { |
585 | Link *l; | |
091a364c TG |
586 | |
587 | if (!m) | |
74b2466e LP |
588 | return NULL; |
589 | ||
4b95f179 LP |
590 | dns_server_unlink_all(m->dns_servers); |
591 | dns_server_unlink_all(m->fallback_dns_servers); | |
a51c1048 LP |
592 | dns_search_domain_unlink_all(m->search_domains); |
593 | ||
74b2466e LP |
594 | while ((l = hashmap_first(m->links))) |
595 | link_free(l); | |
f0e15467 LP |
596 | |
597 | while (m->dns_queries) | |
598 | dns_query_free(m->dns_queries); | |
74b2466e | 599 | |
cab5b059 LP |
600 | dns_scope_free(m->unicast_scope); |
601 | ||
b30bf55d LP |
602 | /* At this point only orphaned streams should remain. All others should have been freed already by their |
603 | * owners */ | |
604 | while (m->dns_streams) | |
605 | dns_stream_unref(m->dns_streams); | |
606 | ||
f0e15467 LP |
607 | hashmap_free(m->links); |
608 | hashmap_free(m->dns_transactions); | |
609 | ||
096b6773 LP |
610 | sd_event_source_unref(m->network_event_source); |
611 | sd_network_monitor_unref(m->network_monitor); | |
091a364c | 612 | |
a564ca2f LP |
613 | sd_netlink_unref(m->rtnl); |
614 | sd_event_source_unref(m->rtnl_event_source); | |
615 | ||
edc501d4 | 616 | manager_llmnr_stop(m); |
bc7702b0 | 617 | manager_mdns_stop(m); |
b30bf55d | 618 | manager_dns_stub_stop(m); |
623a4c97 | 619 | |
902bb5d8 | 620 | sd_bus_slot_unref(m->prepare_for_sleep_slot); |
74b2466e LP |
621 | sd_event_source_unref(m->bus_retry_event_source); |
622 | sd_bus_unref(m->bus); | |
091a364c | 623 | |
4d506d6b | 624 | sd_event_source_unref(m->sigusr1_event_source); |
bc81447e | 625 | sd_event_source_unref(m->sigusr2_event_source); |
4d506d6b | 626 | |
74b2466e | 627 | sd_event_unref(m->event); |
623a4c97 | 628 | |
78c6a153 LP |
629 | dns_resource_key_unref(m->llmnr_host_ipv4_key); |
630 | dns_resource_key_unref(m->llmnr_host_ipv6_key); | |
400cb36e DR |
631 | dns_resource_key_unref(m->mdns_host_ipv4_key); |
632 | dns_resource_key_unref(m->mdns_host_ipv6_key); | |
eb60f9cd | 633 | |
eb60f9cd | 634 | sd_event_source_unref(m->hostname_event_source); |
d9fcf2ba | 635 | safe_close(m->hostname_fd); |
e96de0ce LP |
636 | |
637 | free(m->full_hostname); | |
78c6a153 LP |
638 | free(m->llmnr_hostname); |
639 | free(m->mdns_hostname); | |
eb60f9cd | 640 | |
0d2cd476 | 641 | dns_trust_anchor_flush(&m->trust_anchor); |
dd0bc0f1 | 642 | manager_etc_hosts_flush(m); |
0d2cd476 | 643 | |
6b430fdb | 644 | return mfree(m); |
091a364c TG |
645 | } |
646 | ||
1716f6dc | 647 | int manager_recv(Manager *m, int fd, DnsProtocol protocol, DnsPacket **ret) { |
74b2466e | 648 | _cleanup_(dns_packet_unrefp) DnsPacket *p = NULL; |
1716f6dc LP |
649 | union { |
650 | struct cmsghdr header; /* For alignment */ | |
40a1eebd | 651 | uint8_t buffer[CMSG_SPACE(MAXSIZE(struct in_pktinfo, struct in6_pktinfo)) |
1716f6dc | 652 | + CMSG_SPACE(int) /* ttl/hoplimit */ |
623a4c97 | 653 | + EXTRA_CMSG_SPACE /* kernel appears to require extra buffer space */]; |
1716f6dc LP |
654 | } control; |
655 | union sockaddr_union sa; | |
74b2466e | 656 | struct msghdr mh = {}; |
1716f6dc | 657 | struct cmsghdr *cmsg; |
74b2466e | 658 | struct iovec iov; |
4edc2c9b LP |
659 | ssize_t ms, l; |
660 | int r; | |
74b2466e LP |
661 | |
662 | assert(m); | |
1716f6dc | 663 | assert(fd >= 0); |
74b2466e LP |
664 | assert(ret); |
665 | ||
4edc2c9b | 666 | ms = next_datagram_size_fd(fd); |
74b2466e | 667 | if (ms < 0) |
4edc2c9b | 668 | return ms; |
74b2466e | 669 | |
1716f6dc | 670 | r = dns_packet_new(&p, protocol, ms); |
74b2466e LP |
671 | if (r < 0) |
672 | return r; | |
673 | ||
674 | iov.iov_base = DNS_PACKET_DATA(p); | |
675 | iov.iov_len = p->allocated; | |
676 | ||
1716f6dc LP |
677 | mh.msg_name = &sa.sa; |
678 | mh.msg_namelen = sizeof(sa); | |
74b2466e LP |
679 | mh.msg_iov = &iov; |
680 | mh.msg_iovlen = 1; | |
1716f6dc LP |
681 | mh.msg_control = &control; |
682 | mh.msg_controllen = sizeof(control); | |
74b2466e | 683 | |
a38d9945 | 684 | l = recvmsg(fd, &mh, 0); |
f134289a EV |
685 | if (l == 0) |
686 | return 0; | |
74b2466e | 687 | if (l < 0) { |
ad867662 | 688 | if (errno == EAGAIN || errno == EINTR) |
74b2466e LP |
689 | return 0; |
690 | ||
691 | return -errno; | |
091a364c TG |
692 | } |
693 | ||
1716f6dc LP |
694 | assert(!(mh.msg_flags & MSG_CTRUNC)); |
695 | assert(!(mh.msg_flags & MSG_TRUNC)); | |
696 | ||
74b2466e | 697 | p->size = (size_t) l; |
091a364c | 698 | |
1716f6dc | 699 | p->family = sa.sa.sa_family; |
623a4c97 LP |
700 | p->ipproto = IPPROTO_UDP; |
701 | if (p->family == AF_INET) { | |
1716f6dc | 702 | p->sender.in = sa.in.sin_addr; |
623a4c97 LP |
703 | p->sender_port = be16toh(sa.in.sin_port); |
704 | } else if (p->family == AF_INET6) { | |
1716f6dc | 705 | p->sender.in6 = sa.in6.sin6_addr; |
623a4c97 LP |
706 | p->sender_port = be16toh(sa.in6.sin6_port); |
707 | p->ifindex = sa.in6.sin6_scope_id; | |
708 | } else | |
1716f6dc | 709 | return -EAFNOSUPPORT; |
74b2466e | 710 | |
2a1288ff | 711 | CMSG_FOREACH(cmsg, &mh) { |
74b2466e | 712 | |
1716f6dc LP |
713 | if (cmsg->cmsg_level == IPPROTO_IPV6) { |
714 | assert(p->family == AF_INET6); | |
74b2466e | 715 | |
1716f6dc | 716 | switch (cmsg->cmsg_type) { |
74b2466e | 717 | |
1716f6dc LP |
718 | case IPV6_PKTINFO: { |
719 | struct in6_pktinfo *i = (struct in6_pktinfo*) CMSG_DATA(cmsg); | |
74b2466e | 720 | |
623a4c97 LP |
721 | if (p->ifindex <= 0) |
722 | p->ifindex = i->ipi6_ifindex; | |
723 | ||
1716f6dc LP |
724 | p->destination.in6 = i->ipi6_addr; |
725 | break; | |
726 | } | |
74b2466e | 727 | |
1716f6dc LP |
728 | case IPV6_HOPLIMIT: |
729 | p->ttl = *(int *) CMSG_DATA(cmsg); | |
730 | break; | |
74b2466e | 731 | |
1716f6dc LP |
732 | } |
733 | } else if (cmsg->cmsg_level == IPPROTO_IP) { | |
734 | assert(p->family == AF_INET); | |
74b2466e | 735 | |
1716f6dc | 736 | switch (cmsg->cmsg_type) { |
74b2466e | 737 | |
1716f6dc LP |
738 | case IP_PKTINFO: { |
739 | struct in_pktinfo *i = (struct in_pktinfo*) CMSG_DATA(cmsg); | |
091a364c | 740 | |
623a4c97 LP |
741 | if (p->ifindex <= 0) |
742 | p->ifindex = i->ipi_ifindex; | |
743 | ||
1716f6dc LP |
744 | p->destination.in = i->ipi_addr; |
745 | break; | |
746 | } | |
74b2466e | 747 | |
623a4c97 | 748 | case IP_TTL: |
1716f6dc LP |
749 | p->ttl = *(int *) CMSG_DATA(cmsg); |
750 | break; | |
751 | } | |
752 | } | |
753 | } | |
74b2466e | 754 | |
623a4c97 LP |
755 | /* The Linux kernel sets the interface index to the loopback |
756 | * device if the packet came from the local host since it | |
757 | * avoids the routing table in such a case. Let's unset the | |
758 | * interface index in such a case. */ | |
a5f03596 | 759 | if (p->ifindex == LOOPBACK_IFINDEX) |
623a4c97 LP |
760 | p->ifindex = 0; |
761 | ||
86ad4cd7 TG |
762 | if (protocol != DNS_PROTOCOL_DNS) { |
763 | /* If we don't know the interface index still, we look for the | |
764 | * first local interface with a matching address. Yuck! */ | |
765 | if (p->ifindex <= 0) | |
766 | p->ifindex = manager_find_ifindex(m, p->family, &p->destination); | |
767 | } | |
623a4c97 | 768 | |
74b2466e LP |
769 | *ret = p; |
770 | p = NULL; | |
771 | ||
772 | return 1; | |
773 | } | |
774 | ||
74b2466e LP |
775 | static int sendmsg_loop(int fd, struct msghdr *mh, int flags) { |
776 | int r; | |
777 | ||
778 | assert(fd >= 0); | |
779 | assert(mh); | |
780 | ||
781 | for (;;) { | |
782 | if (sendmsg(fd, mh, flags) >= 0) | |
783 | return 0; | |
784 | ||
785 | if (errno == EINTR) | |
786 | continue; | |
787 | ||
788 | if (errno != EAGAIN) | |
789 | return -errno; | |
790 | ||
791 | r = fd_wait_for_event(fd, POLLOUT, SEND_TIMEOUT_USEC); | |
792 | if (r < 0) | |
793 | return r; | |
794 | if (r == 0) | |
795 | return -ETIMEDOUT; | |
796 | } | |
797 | } | |
798 | ||
72290734 TG |
799 | static int write_loop(int fd, void *message, size_t length) { |
800 | int r; | |
801 | ||
802 | assert(fd >= 0); | |
803 | assert(message); | |
804 | ||
805 | for (;;) { | |
806 | if (write(fd, message, length) >= 0) | |
807 | return 0; | |
808 | ||
809 | if (errno == EINTR) | |
810 | continue; | |
811 | ||
812 | if (errno != EAGAIN) | |
813 | return -errno; | |
814 | ||
815 | r = fd_wait_for_event(fd, POLLOUT, SEND_TIMEOUT_USEC); | |
816 | if (r < 0) | |
817 | return r; | |
818 | if (r == 0) | |
819 | return -ETIMEDOUT; | |
820 | } | |
821 | } | |
822 | ||
823 | int manager_write(Manager *m, int fd, DnsPacket *p) { | |
824 | int r; | |
825 | ||
deb3f3d3 | 826 | log_debug("Sending %s packet with id %" PRIu16 ".", DNS_PACKET_QR(p) ? "response" : "query", DNS_PACKET_ID(p)); |
72290734 TG |
827 | |
828 | r = write_loop(fd, DNS_PACKET_DATA(p), p->size); | |
829 | if (r < 0) | |
830 | return r; | |
831 | ||
832 | return 0; | |
833 | } | |
834 | ||
b30bf55d LP |
835 | static int manager_ipv4_send( |
836 | Manager *m, | |
837 | int fd, | |
838 | int ifindex, | |
839 | const struct in_addr *destination, | |
840 | uint16_t port, | |
841 | const struct in_addr *source, | |
842 | DnsPacket *p) { | |
74b2466e LP |
843 | union sockaddr_union sa = { |
844 | .in.sin_family = AF_INET, | |
74b2466e | 845 | }; |
1716f6dc LP |
846 | union { |
847 | struct cmsghdr header; /* For alignment */ | |
848 | uint8_t buffer[CMSG_SPACE(sizeof(struct in_pktinfo))]; | |
849 | } control; | |
74b2466e LP |
850 | struct msghdr mh = {}; |
851 | struct iovec iov; | |
74b2466e LP |
852 | |
853 | assert(m); | |
1716f6dc | 854 | assert(fd >= 0); |
b30bf55d | 855 | assert(destination); |
1716f6dc | 856 | assert(port > 0); |
74b2466e LP |
857 | assert(p); |
858 | ||
74b2466e LP |
859 | iov.iov_base = DNS_PACKET_DATA(p); |
860 | iov.iov_len = p->size; | |
091a364c | 861 | |
b30bf55d | 862 | sa.in.sin_addr = *destination; |
1716f6dc | 863 | sa.in.sin_port = htobe16(port), |
091a364c | 864 | |
74b2466e LP |
865 | mh.msg_iov = &iov; |
866 | mh.msg_iovlen = 1; | |
867 | mh.msg_name = &sa.sa; | |
868 | mh.msg_namelen = sizeof(sa.in); | |
091a364c | 869 | |
74b2466e LP |
870 | if (ifindex > 0) { |
871 | struct cmsghdr *cmsg; | |
872 | struct in_pktinfo *pi; | |
873 | ||
874 | zero(control); | |
875 | ||
1716f6dc | 876 | mh.msg_control = &control; |
74b2466e LP |
877 | mh.msg_controllen = CMSG_LEN(sizeof(struct in_pktinfo)); |
878 | ||
879 | cmsg = CMSG_FIRSTHDR(&mh); | |
880 | cmsg->cmsg_len = mh.msg_controllen; | |
881 | cmsg->cmsg_level = IPPROTO_IP; | |
882 | cmsg->cmsg_type = IP_PKTINFO; | |
883 | ||
884 | pi = (struct in_pktinfo*) CMSG_DATA(cmsg); | |
885 | pi->ipi_ifindex = ifindex; | |
b30bf55d LP |
886 | |
887 | if (source) | |
888 | pi->ipi_spec_dst = *source; | |
74b2466e LP |
889 | } |
890 | ||
891 | return sendmsg_loop(fd, &mh, 0); | |
892 | } | |
893 | ||
b30bf55d LP |
894 | static int manager_ipv6_send( |
895 | Manager *m, | |
896 | int fd, | |
897 | int ifindex, | |
898 | const struct in6_addr *destination, | |
899 | uint16_t port, | |
900 | const struct in6_addr *source, | |
901 | DnsPacket *p) { | |
902 | ||
74b2466e LP |
903 | union sockaddr_union sa = { |
904 | .in6.sin6_family = AF_INET6, | |
74b2466e | 905 | }; |
1716f6dc LP |
906 | union { |
907 | struct cmsghdr header; /* For alignment */ | |
908 | uint8_t buffer[CMSG_SPACE(sizeof(struct in6_pktinfo))]; | |
909 | } control; | |
74b2466e LP |
910 | struct msghdr mh = {}; |
911 | struct iovec iov; | |
74b2466e LP |
912 | |
913 | assert(m); | |
1716f6dc | 914 | assert(fd >= 0); |
b30bf55d | 915 | assert(destination); |
1716f6dc | 916 | assert(port > 0); |
74b2466e LP |
917 | assert(p); |
918 | ||
74b2466e LP |
919 | iov.iov_base = DNS_PACKET_DATA(p); |
920 | iov.iov_len = p->size; | |
921 | ||
b30bf55d | 922 | sa.in6.sin6_addr = *destination; |
1716f6dc | 923 | sa.in6.sin6_port = htobe16(port), |
74b2466e LP |
924 | sa.in6.sin6_scope_id = ifindex; |
925 | ||
926 | mh.msg_iov = &iov; | |
927 | mh.msg_iovlen = 1; | |
928 | mh.msg_name = &sa.sa; | |
929 | mh.msg_namelen = sizeof(sa.in6); | |
930 | ||
931 | if (ifindex > 0) { | |
932 | struct cmsghdr *cmsg; | |
933 | struct in6_pktinfo *pi; | |
934 | ||
935 | zero(control); | |
936 | ||
1716f6dc | 937 | mh.msg_control = &control; |
74b2466e LP |
938 | mh.msg_controllen = CMSG_LEN(sizeof(struct in6_pktinfo)); |
939 | ||
940 | cmsg = CMSG_FIRSTHDR(&mh); | |
941 | cmsg->cmsg_len = mh.msg_controllen; | |
942 | cmsg->cmsg_level = IPPROTO_IPV6; | |
943 | cmsg->cmsg_type = IPV6_PKTINFO; | |
944 | ||
945 | pi = (struct in6_pktinfo*) CMSG_DATA(cmsg); | |
946 | pi->ipi6_ifindex = ifindex; | |
b30bf55d LP |
947 | |
948 | if (source) | |
949 | pi->ipi6_addr = *source; | |
74b2466e LP |
950 | } |
951 | ||
952 | return sendmsg_loop(fd, &mh, 0); | |
953 | } | |
954 | ||
b30bf55d LP |
955 | int manager_send( |
956 | Manager *m, | |
957 | int fd, | |
958 | int ifindex, | |
959 | int family, | |
960 | const union in_addr_union *destination, | |
961 | uint16_t port, | |
962 | const union in_addr_union *source, | |
963 | DnsPacket *p) { | |
964 | ||
1716f6dc LP |
965 | assert(m); |
966 | assert(fd >= 0); | |
b30bf55d | 967 | assert(destination); |
1716f6dc LP |
968 | assert(port > 0); |
969 | assert(p); | |
970 | ||
deb3f3d3 | 971 | 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 | 972 | |
1716f6dc | 973 | if (family == AF_INET) |
b30bf55d | 974 | return manager_ipv4_send(m, fd, ifindex, &destination->in, port, &source->in, p); |
2817157b | 975 | if (family == AF_INET6) |
b30bf55d | 976 | return manager_ipv6_send(m, fd, ifindex, &destination->in6, port, &source->in6, p); |
1716f6dc LP |
977 | |
978 | return -EAFNOSUPPORT; | |
979 | } | |
980 | ||
e1c95994 LP |
981 | uint32_t manager_find_mtu(Manager *m) { |
982 | uint32_t mtu = 0; | |
983 | Link *l; | |
984 | Iterator i; | |
985 | ||
986 | /* If we don't know on which link a DNS packet would be | |
987 | * delivered, let's find the largest MTU that works on all | |
988 | * interfaces we know of */ | |
989 | ||
990 | HASHMAP_FOREACH(l, m->links, i) { | |
991 | if (l->mtu <= 0) | |
992 | continue; | |
993 | ||
994 | if (mtu <= 0 || l->mtu < mtu) | |
995 | mtu = l->mtu; | |
996 | } | |
997 | ||
998 | return mtu; | |
999 | } | |
1716f6dc | 1000 | |
623a4c97 | 1001 | int manager_find_ifindex(Manager *m, int family, const union in_addr_union *in_addr) { |
ec2c5e43 LP |
1002 | LinkAddress *a; |
1003 | ||
1004 | assert(m); | |
1005 | ||
4e945a6f | 1006 | a = manager_find_link_address(m, family, in_addr); |
ec2c5e43 LP |
1007 | if (a) |
1008 | return a->link->ifindex; | |
1009 | ||
1010 | return 0; | |
1011 | } | |
1012 | ||
eb60f9cd LP |
1013 | void manager_refresh_rrs(Manager *m) { |
1014 | Iterator i; | |
1015 | Link *l; | |
1016 | ||
1017 | assert(m); | |
1018 | ||
78c6a153 LP |
1019 | m->llmnr_host_ipv4_key = dns_resource_key_unref(m->llmnr_host_ipv4_key); |
1020 | m->llmnr_host_ipv6_key = dns_resource_key_unref(m->llmnr_host_ipv6_key); | |
400cb36e DR |
1021 | m->mdns_host_ipv4_key = dns_resource_key_unref(m->mdns_host_ipv4_key); |
1022 | m->mdns_host_ipv6_key = dns_resource_key_unref(m->mdns_host_ipv6_key); | |
eb60f9cd LP |
1023 | |
1024 | HASHMAP_FOREACH(l, m->links, i) { | |
1025 | link_add_rrs(l, true); | |
1026 | link_add_rrs(l, false); | |
1027 | } | |
1028 | } | |
1029 | ||
ec2c5e43 LP |
1030 | int manager_next_hostname(Manager *m) { |
1031 | const char *p; | |
556a2294 | 1032 | uint64_t u, a; |
78c6a153 LP |
1033 | char *h, *k; |
1034 | int r; | |
623a4c97 LP |
1035 | |
1036 | assert(m); | |
1037 | ||
78c6a153 | 1038 | p = strchr(m->llmnr_hostname, 0); |
ec2c5e43 LP |
1039 | assert(p); |
1040 | ||
78c6a153 | 1041 | while (p > m->llmnr_hostname) { |
ec2c5e43 LP |
1042 | if (!strchr("0123456789", p[-1])) |
1043 | break; | |
1044 | ||
1045 | p--; | |
1046 | } | |
1047 | ||
1048 | if (*p == 0 || safe_atou64(p, &u) < 0 || u <= 0) | |
1049 | u = 1; | |
1050 | ||
556a2294 LP |
1051 | /* Add a random number to the old value. This way we can avoid |
1052 | * that two hosts pick the same hostname, win on IPv4 and lose | |
1053 | * on IPv6 (or vice versa), and pick the same hostname | |
1054 | * replacement hostname, ad infinitum. We still want the | |
1055 | * numbers to go up monotonically, hence we just add a random | |
1056 | * value 1..10 */ | |
1057 | ||
1058 | random_bytes(&a, sizeof(a)); | |
1059 | u += 1 + a % 10; | |
ec2c5e43 | 1060 | |
78c6a153 | 1061 | if (asprintf(&h, "%.*s%" PRIu64, (int) (p - m->llmnr_hostname), m->llmnr_hostname, u) < 0) |
ec2c5e43 LP |
1062 | return -ENOMEM; |
1063 | ||
78c6a153 LP |
1064 | r = dns_name_concat(h, "local", &k); |
1065 | if (r < 0) { | |
1066 | free(h); | |
1067 | return r; | |
1068 | } | |
1069 | ||
1070 | log_info("Hostname conflict, changing published hostname from '%s' to '%s'.", m->llmnr_hostname, h); | |
1071 | ||
1072 | free(m->llmnr_hostname); | |
1073 | m->llmnr_hostname = h; | |
ec2c5e43 | 1074 | |
78c6a153 LP |
1075 | free(m->mdns_hostname); |
1076 | m->mdns_hostname = k; | |
ec2c5e43 | 1077 | |
eb60f9cd | 1078 | manager_refresh_rrs(m); |
623a4c97 LP |
1079 | |
1080 | return 0; | |
1081 | } | |
ec2c5e43 | 1082 | |
4e945a6f | 1083 | LinkAddress* manager_find_link_address(Manager *m, int family, const union in_addr_union *in_addr) { |
ec2c5e43 LP |
1084 | Iterator i; |
1085 | Link *l; | |
1086 | ||
1087 | assert(m); | |
1088 | ||
1089 | HASHMAP_FOREACH(l, m->links, i) { | |
1090 | LinkAddress *a; | |
1091 | ||
1092 | a = link_find_address(l, family, in_addr); | |
1093 | if (a) | |
1094 | return a; | |
1095 | } | |
1096 | ||
1097 | return NULL; | |
1098 | } | |
1099 | ||
a4076574 | 1100 | bool manager_our_packet(Manager *m, DnsPacket *p) { |
ec2c5e43 LP |
1101 | assert(m); |
1102 | assert(p); | |
1103 | ||
4e945a6f | 1104 | return !!manager_find_link_address(m, p->family, &p->sender); |
ec2c5e43 | 1105 | } |
4e945a6f | 1106 | |
a4076574 LP |
1107 | DnsScope* manager_find_scope(Manager *m, DnsPacket *p) { |
1108 | Link *l; | |
1109 | ||
1110 | assert(m); | |
1111 | assert(p); | |
1112 | ||
1113 | l = hashmap_get(m->links, INT_TO_PTR(p->ifindex)); | |
1114 | if (!l) | |
1115 | return NULL; | |
1116 | ||
b4f1862d DM |
1117 | switch (p->protocol) { |
1118 | case DNS_PROTOCOL_LLMNR: | |
a4076574 LP |
1119 | if (p->family == AF_INET) |
1120 | return l->llmnr_ipv4_scope; | |
1121 | else if (p->family == AF_INET6) | |
1122 | return l->llmnr_ipv6_scope; | |
b4f1862d DM |
1123 | |
1124 | break; | |
1125 | ||
1126 | case DNS_PROTOCOL_MDNS: | |
1127 | if (p->family == AF_INET) | |
1128 | return l->mdns_ipv4_scope; | |
1129 | else if (p->family == AF_INET6) | |
1130 | return l->mdns_ipv6_scope; | |
1131 | ||
1132 | break; | |
1133 | ||
1134 | default: | |
1135 | break; | |
a4076574 LP |
1136 | } |
1137 | ||
1138 | return NULL; | |
1139 | } | |
1140 | ||
902bb5d8 LP |
1141 | void manager_verify_all(Manager *m) { |
1142 | DnsScope *s; | |
1143 | ||
1144 | assert(m); | |
1145 | ||
1146 | LIST_FOREACH(scopes, s, m->dns_scopes) | |
1147 | dns_zone_verify_all(&s->zone); | |
1148 | } | |
1149 | ||
78c6a153 | 1150 | int manager_is_own_hostname(Manager *m, const char *name) { |
78c6a153 LP |
1151 | int r; |
1152 | ||
1153 | assert(m); | |
1154 | assert(name); | |
1155 | ||
1156 | if (m->llmnr_hostname) { | |
1157 | r = dns_name_equal(name, m->llmnr_hostname); | |
1158 | if (r != 0) | |
1159 | return r; | |
1160 | } | |
1161 | ||
e96de0ce LP |
1162 | if (m->mdns_hostname) { |
1163 | r = dns_name_equal(name, m->mdns_hostname); | |
1164 | if (r != 0) | |
1165 | return r; | |
1166 | } | |
1167 | ||
1168 | if (m->full_hostname) | |
1169 | return dns_name_equal(name, m->full_hostname); | |
78c6a153 LP |
1170 | |
1171 | return 0; | |
1172 | } | |
1173 | ||
9176a57c LP |
1174 | int manager_compile_dns_servers(Manager *m, OrderedSet **dns) { |
1175 | DnsServer *s; | |
1176 | Iterator i; | |
1177 | Link *l; | |
1178 | int r; | |
1179 | ||
1180 | assert(m); | |
1181 | assert(dns); | |
1182 | ||
1183 | r = ordered_set_ensure_allocated(dns, &dns_server_hash_ops); | |
1184 | if (r < 0) | |
1185 | return r; | |
1186 | ||
1187 | /* First add the system-wide servers and domains */ | |
1188 | LIST_FOREACH(servers, s, m->dns_servers) { | |
1189 | r = ordered_set_put(*dns, s); | |
1190 | if (r == -EEXIST) | |
1191 | continue; | |
1192 | if (r < 0) | |
1193 | return r; | |
1194 | } | |
1195 | ||
1196 | /* Then, add the per-link servers */ | |
1197 | HASHMAP_FOREACH(l, m->links, i) { | |
1198 | LIST_FOREACH(servers, s, l->dns_servers) { | |
1199 | r = ordered_set_put(*dns, s); | |
1200 | if (r == -EEXIST) | |
1201 | continue; | |
1202 | if (r < 0) | |
1203 | return r; | |
1204 | } | |
1205 | } | |
1206 | ||
1207 | /* If we found nothing, add the fallback servers */ | |
1208 | if (ordered_set_isempty(*dns)) { | |
1209 | LIST_FOREACH(servers, s, m->fallback_dns_servers) { | |
1210 | r = ordered_set_put(*dns, s); | |
1211 | if (r == -EEXIST) | |
1212 | continue; | |
1213 | if (r < 0) | |
1214 | return r; | |
1215 | } | |
1216 | } | |
1217 | ||
1218 | return 0; | |
1219 | } | |
1220 | ||
94363cbb MP |
1221 | /* filter_route is a tri-state: |
1222 | * < 0: no filtering | |
1223 | * = 0 or false: return only domains which should be used for searching | |
1224 | * > 0 or true: return only domains which are for routing only | |
1225 | */ | |
6f7da49d | 1226 | int manager_compile_search_domains(Manager *m, OrderedSet **domains, int filter_route) { |
9176a57c LP |
1227 | DnsSearchDomain *d; |
1228 | Iterator i; | |
1229 | Link *l; | |
1230 | int r; | |
1231 | ||
1232 | assert(m); | |
1233 | assert(domains); | |
1234 | ||
1235 | r = ordered_set_ensure_allocated(domains, &dns_name_hash_ops); | |
1236 | if (r < 0) | |
1237 | return r; | |
1238 | ||
1239 | LIST_FOREACH(domains, d, m->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 | HASHMAP_FOREACH(l, m->links, i) { | |
1253 | ||
1254 | LIST_FOREACH(domains, d, l->search_domains) { | |
6f7da49d LP |
1255 | |
1256 | if (filter_route >= 0 && | |
1257 | d->route_only != !!filter_route) | |
1258 | continue; | |
1259 | ||
9176a57c LP |
1260 | r = ordered_set_put(*domains, d->name); |
1261 | if (r == -EEXIST) | |
1262 | continue; | |
1263 | if (r < 0) | |
1264 | return r; | |
1265 | } | |
1266 | } | |
1267 | ||
1268 | return 0; | |
1269 | } | |
c69fa7e3 LP |
1270 | |
1271 | DnssecMode manager_get_dnssec_mode(Manager *m) { | |
1272 | assert(m); | |
1273 | ||
1274 | if (m->dnssec_mode != _DNSSEC_MODE_INVALID) | |
1275 | return m->dnssec_mode; | |
1276 | ||
1277 | return DNSSEC_NO; | |
1278 | } | |
1279 | ||
1280 | bool manager_dnssec_supported(Manager *m) { | |
1281 | DnsServer *server; | |
1282 | Iterator i; | |
1283 | Link *l; | |
1284 | ||
1285 | assert(m); | |
1286 | ||
1287 | if (manager_get_dnssec_mode(m) == DNSSEC_NO) | |
1288 | return false; | |
1289 | ||
1290 | server = manager_get_dns_server(m); | |
1291 | if (server && !dns_server_dnssec_supported(server)) | |
1292 | return false; | |
1293 | ||
1294 | HASHMAP_FOREACH(l, m->links, i) | |
1295 | if (!link_dnssec_supported(l)) | |
1296 | return false; | |
1297 | ||
1298 | return true; | |
1299 | } | |
59c5b597 LP |
1300 | |
1301 | void manager_dnssec_verdict(Manager *m, DnssecVerdict verdict, const DnsResourceKey *key) { | |
1302 | ||
1303 | assert(verdict >= 0); | |
1304 | assert(verdict < _DNSSEC_VERDICT_MAX); | |
1305 | ||
1306 | if (log_get_max_level() >= LOG_DEBUG) { | |
202b76ae | 1307 | char s[DNS_RESOURCE_KEY_STRING_MAX]; |
59c5b597 | 1308 | |
202b76ae ZJS |
1309 | log_debug("Found verdict for lookup %s: %s", |
1310 | dns_resource_key_to_string(key, s, sizeof s), | |
1311 | dnssec_verdict_to_string(verdict)); | |
59c5b597 LP |
1312 | } |
1313 | ||
1314 | m->n_dnssec_verdict[verdict]++; | |
1315 | } | |
011696f7 LP |
1316 | |
1317 | bool manager_routable(Manager *m, int family) { | |
1318 | Iterator i; | |
1319 | Link *l; | |
1320 | ||
1321 | assert(m); | |
1322 | ||
1323 | /* Returns true if the host has at least one interface with a routable address of the specified type */ | |
1324 | ||
1325 | HASHMAP_FOREACH(l, m->links, i) | |
1326 | if (link_relevant(l, family, false)) | |
1327 | return true; | |
1328 | ||
1329 | return false; | |
1330 | } | |
ba35662f LP |
1331 | |
1332 | void manager_flush_caches(Manager *m) { | |
1333 | DnsScope *scope; | |
1334 | ||
1335 | assert(m); | |
1336 | ||
1337 | LIST_FOREACH(scopes, scope, m->dns_scopes) | |
1338 | dns_cache_flush(&scope->cache); | |
aac57b35 ZJS |
1339 | |
1340 | log_info("Flushed all caches."); | |
ba35662f | 1341 | } |
943ef07c LP |
1342 | |
1343 | void manager_cleanup_saved_user(Manager *m) { | |
1344 | _cleanup_closedir_ DIR *d = NULL; | |
1345 | struct dirent *de; | |
1346 | int r; | |
1347 | ||
1348 | assert(m); | |
1349 | ||
1350 | /* Clean up all saved per-link files in /run/systemd/resolve/netif/ that don't have a matching interface | |
1351 | * anymore. These files are created to persist settings pushed in by the user via the bus, so that resolved can | |
1352 | * be restarted without losing this data. */ | |
1353 | ||
1354 | d = opendir("/run/systemd/resolve/netif/"); | |
1355 | if (!d) { | |
1356 | if (errno == ENOENT) | |
1357 | return; | |
1358 | ||
1359 | log_warning_errno(errno, "Failed to open interface directory: %m"); | |
1360 | return; | |
1361 | } | |
1362 | ||
1363 | FOREACH_DIRENT_ALL(de, d, log_error_errno(errno, "Failed to read interface directory: %m")) { | |
1364 | _cleanup_free_ char *p = NULL; | |
1365 | int ifindex; | |
1366 | Link *l; | |
1367 | ||
1368 | if (!IN_SET(de->d_type, DT_UNKNOWN, DT_REG)) | |
1369 | continue; | |
1370 | ||
49bfc877 | 1371 | if (dot_or_dot_dot(de->d_name)) |
943ef07c LP |
1372 | continue; |
1373 | ||
1374 | r = parse_ifindex(de->d_name, &ifindex); | |
1375 | if (r < 0) /* Probably some temporary file from a previous run. Delete it */ | |
1376 | goto rm; | |
1377 | ||
1378 | l = hashmap_get(m->links, INT_TO_PTR(ifindex)); | |
1379 | if (!l) /* link vanished */ | |
1380 | goto rm; | |
1381 | ||
1382 | if (l->is_managed) /* now managed by networkd, hence the bus settings are useless */ | |
1383 | goto rm; | |
1384 | ||
1385 | continue; | |
1386 | ||
1387 | rm: | |
1388 | p = strappend("/run/systemd/resolve/netif/", de->d_name); | |
1389 | if (!p) { | |
1390 | log_oom(); | |
1391 | return; | |
1392 | } | |
1393 | ||
1394 | (void) unlink(p); | |
1395 | } | |
1396 | } |