core: when booting up, initialize hostname to compile-time fallback hostname
[thirdparty/systemd.git] / src / resolve / resolved-manager.c
CommitLineData
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 52static 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
109fail:
da927ba9 110 log_warning_errno(r, "Failed to process RTNL link message: %m");
74b2466e
LP
111 return 0;
112}
113
1c4baffc 114static 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
193fail:
da927ba9 194 log_warning_errno(r, "Failed to process RTNL address message: %m");
74b2466e
LP
195 return 0;
196}
197
74b2466e 198static 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
274static 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
295static 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 325static 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
384static 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
411static 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
454static 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
479static 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 491int 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
564int 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
584Manager *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 647int 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
775static 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
799static 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
823int 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
835static 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
894static 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
955int 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
981uint32_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 1001int 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
1013void 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
1030int 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 1083LinkAddress* 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 1100bool 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
1107DnsScope* 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
1141void 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 1150int 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
1174int 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 1226int 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
1271DnssecMode 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
1280bool 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
1301void 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
1317bool 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
1332void 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
1343void 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}