nss-myhostname: don't fill scopeid for non-link-local addresses
[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
78c6a153 325static 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
380static 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
409static 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
447static 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
472static 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 484int 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
557int 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
577Manager *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);
eb60f9cd 624
eb60f9cd 625 sd_event_source_unref(m->hostname_event_source);
d9fcf2ba 626 safe_close(m->hostname_fd);
78c6a153
LP
627 free(m->llmnr_hostname);
628 free(m->mdns_hostname);
eb60f9cd 629
0d2cd476 630 dns_trust_anchor_flush(&m->trust_anchor);
dd0bc0f1 631 manager_etc_hosts_flush(m);
0d2cd476 632
6b430fdb 633 return mfree(m);
091a364c
TG
634}
635
1716f6dc 636int manager_recv(Manager *m, int fd, DnsProtocol protocol, DnsPacket **ret) {
74b2466e 637 _cleanup_(dns_packet_unrefp) DnsPacket *p = NULL;
1716f6dc
LP
638 union {
639 struct cmsghdr header; /* For alignment */
40a1eebd 640 uint8_t buffer[CMSG_SPACE(MAXSIZE(struct in_pktinfo, struct in6_pktinfo))
1716f6dc 641 + CMSG_SPACE(int) /* ttl/hoplimit */
623a4c97 642 + EXTRA_CMSG_SPACE /* kernel appears to require extra buffer space */];
1716f6dc
LP
643 } control;
644 union sockaddr_union sa;
74b2466e 645 struct msghdr mh = {};
1716f6dc 646 struct cmsghdr *cmsg;
74b2466e 647 struct iovec iov;
4edc2c9b
LP
648 ssize_t ms, l;
649 int r;
74b2466e
LP
650
651 assert(m);
1716f6dc 652 assert(fd >= 0);
74b2466e
LP
653 assert(ret);
654
4edc2c9b 655 ms = next_datagram_size_fd(fd);
74b2466e 656 if (ms < 0)
4edc2c9b 657 return ms;
74b2466e 658
1716f6dc 659 r = dns_packet_new(&p, protocol, ms);
74b2466e
LP
660 if (r < 0)
661 return r;
662
663 iov.iov_base = DNS_PACKET_DATA(p);
664 iov.iov_len = p->allocated;
665
1716f6dc
LP
666 mh.msg_name = &sa.sa;
667 mh.msg_namelen = sizeof(sa);
74b2466e
LP
668 mh.msg_iov = &iov;
669 mh.msg_iovlen = 1;
1716f6dc
LP
670 mh.msg_control = &control;
671 mh.msg_controllen = sizeof(control);
74b2466e 672
a38d9945 673 l = recvmsg(fd, &mh, 0);
f134289a
EV
674 if (l == 0)
675 return 0;
74b2466e 676 if (l < 0) {
ad867662 677 if (errno == EAGAIN || errno == EINTR)
74b2466e
LP
678 return 0;
679
680 return -errno;
091a364c
TG
681 }
682
1716f6dc
LP
683 assert(!(mh.msg_flags & MSG_CTRUNC));
684 assert(!(mh.msg_flags & MSG_TRUNC));
685
74b2466e 686 p->size = (size_t) l;
091a364c 687
1716f6dc 688 p->family = sa.sa.sa_family;
623a4c97
LP
689 p->ipproto = IPPROTO_UDP;
690 if (p->family == AF_INET) {
1716f6dc 691 p->sender.in = sa.in.sin_addr;
623a4c97
LP
692 p->sender_port = be16toh(sa.in.sin_port);
693 } else if (p->family == AF_INET6) {
1716f6dc 694 p->sender.in6 = sa.in6.sin6_addr;
623a4c97
LP
695 p->sender_port = be16toh(sa.in6.sin6_port);
696 p->ifindex = sa.in6.sin6_scope_id;
697 } else
1716f6dc 698 return -EAFNOSUPPORT;
74b2466e 699
2a1288ff 700 CMSG_FOREACH(cmsg, &mh) {
74b2466e 701
1716f6dc
LP
702 if (cmsg->cmsg_level == IPPROTO_IPV6) {
703 assert(p->family == AF_INET6);
74b2466e 704
1716f6dc 705 switch (cmsg->cmsg_type) {
74b2466e 706
1716f6dc
LP
707 case IPV6_PKTINFO: {
708 struct in6_pktinfo *i = (struct in6_pktinfo*) CMSG_DATA(cmsg);
74b2466e 709
623a4c97
LP
710 if (p->ifindex <= 0)
711 p->ifindex = i->ipi6_ifindex;
712
1716f6dc
LP
713 p->destination.in6 = i->ipi6_addr;
714 break;
715 }
74b2466e 716
1716f6dc
LP
717 case IPV6_HOPLIMIT:
718 p->ttl = *(int *) CMSG_DATA(cmsg);
719 break;
74b2466e 720
1716f6dc
LP
721 }
722 } else if (cmsg->cmsg_level == IPPROTO_IP) {
723 assert(p->family == AF_INET);
74b2466e 724
1716f6dc 725 switch (cmsg->cmsg_type) {
74b2466e 726
1716f6dc
LP
727 case IP_PKTINFO: {
728 struct in_pktinfo *i = (struct in_pktinfo*) CMSG_DATA(cmsg);
091a364c 729
623a4c97
LP
730 if (p->ifindex <= 0)
731 p->ifindex = i->ipi_ifindex;
732
1716f6dc
LP
733 p->destination.in = i->ipi_addr;
734 break;
735 }
74b2466e 736
623a4c97 737 case IP_TTL:
1716f6dc
LP
738 p->ttl = *(int *) CMSG_DATA(cmsg);
739 break;
740 }
741 }
742 }
74b2466e 743
623a4c97
LP
744 /* The Linux kernel sets the interface index to the loopback
745 * device if the packet came from the local host since it
746 * avoids the routing table in such a case. Let's unset the
747 * interface index in such a case. */
a5f03596 748 if (p->ifindex == LOOPBACK_IFINDEX)
623a4c97
LP
749 p->ifindex = 0;
750
86ad4cd7
TG
751 if (protocol != DNS_PROTOCOL_DNS) {
752 /* If we don't know the interface index still, we look for the
753 * first local interface with a matching address. Yuck! */
754 if (p->ifindex <= 0)
755 p->ifindex = manager_find_ifindex(m, p->family, &p->destination);
756 }
623a4c97 757
74b2466e
LP
758 *ret = p;
759 p = NULL;
760
761 return 1;
762}
763
74b2466e
LP
764static int sendmsg_loop(int fd, struct msghdr *mh, int flags) {
765 int r;
766
767 assert(fd >= 0);
768 assert(mh);
769
770 for (;;) {
771 if (sendmsg(fd, mh, flags) >= 0)
772 return 0;
773
774 if (errno == EINTR)
775 continue;
776
777 if (errno != EAGAIN)
778 return -errno;
779
780 r = fd_wait_for_event(fd, POLLOUT, SEND_TIMEOUT_USEC);
781 if (r < 0)
782 return r;
783 if (r == 0)
784 return -ETIMEDOUT;
785 }
786}
787
72290734
TG
788static int write_loop(int fd, void *message, size_t length) {
789 int r;
790
791 assert(fd >= 0);
792 assert(message);
793
794 for (;;) {
795 if (write(fd, message, length) >= 0)
796 return 0;
797
798 if (errno == EINTR)
799 continue;
800
801 if (errno != EAGAIN)
802 return -errno;
803
804 r = fd_wait_for_event(fd, POLLOUT, SEND_TIMEOUT_USEC);
805 if (r < 0)
806 return r;
807 if (r == 0)
808 return -ETIMEDOUT;
809 }
810}
811
812int manager_write(Manager *m, int fd, DnsPacket *p) {
813 int r;
814
deb3f3d3 815 log_debug("Sending %s packet with id %" PRIu16 ".", DNS_PACKET_QR(p) ? "response" : "query", DNS_PACKET_ID(p));
72290734
TG
816
817 r = write_loop(fd, DNS_PACKET_DATA(p), p->size);
818 if (r < 0)
819 return r;
820
821 return 0;
822}
823
b30bf55d
LP
824static int manager_ipv4_send(
825 Manager *m,
826 int fd,
827 int ifindex,
828 const struct in_addr *destination,
829 uint16_t port,
830 const struct in_addr *source,
831 DnsPacket *p) {
74b2466e
LP
832 union sockaddr_union sa = {
833 .in.sin_family = AF_INET,
74b2466e 834 };
1716f6dc
LP
835 union {
836 struct cmsghdr header; /* For alignment */
837 uint8_t buffer[CMSG_SPACE(sizeof(struct in_pktinfo))];
838 } control;
74b2466e
LP
839 struct msghdr mh = {};
840 struct iovec iov;
74b2466e
LP
841
842 assert(m);
1716f6dc 843 assert(fd >= 0);
b30bf55d 844 assert(destination);
1716f6dc 845 assert(port > 0);
74b2466e
LP
846 assert(p);
847
74b2466e
LP
848 iov.iov_base = DNS_PACKET_DATA(p);
849 iov.iov_len = p->size;
091a364c 850
b30bf55d 851 sa.in.sin_addr = *destination;
1716f6dc 852 sa.in.sin_port = htobe16(port),
091a364c 853
74b2466e
LP
854 mh.msg_iov = &iov;
855 mh.msg_iovlen = 1;
856 mh.msg_name = &sa.sa;
857 mh.msg_namelen = sizeof(sa.in);
091a364c 858
74b2466e
LP
859 if (ifindex > 0) {
860 struct cmsghdr *cmsg;
861 struct in_pktinfo *pi;
862
863 zero(control);
864
1716f6dc 865 mh.msg_control = &control;
74b2466e
LP
866 mh.msg_controllen = CMSG_LEN(sizeof(struct in_pktinfo));
867
868 cmsg = CMSG_FIRSTHDR(&mh);
869 cmsg->cmsg_len = mh.msg_controllen;
870 cmsg->cmsg_level = IPPROTO_IP;
871 cmsg->cmsg_type = IP_PKTINFO;
872
873 pi = (struct in_pktinfo*) CMSG_DATA(cmsg);
874 pi->ipi_ifindex = ifindex;
b30bf55d
LP
875
876 if (source)
877 pi->ipi_spec_dst = *source;
74b2466e
LP
878 }
879
880 return sendmsg_loop(fd, &mh, 0);
881}
882
b30bf55d
LP
883static int manager_ipv6_send(
884 Manager *m,
885 int fd,
886 int ifindex,
887 const struct in6_addr *destination,
888 uint16_t port,
889 const struct in6_addr *source,
890 DnsPacket *p) {
891
74b2466e
LP
892 union sockaddr_union sa = {
893 .in6.sin6_family = AF_INET6,
74b2466e 894 };
1716f6dc
LP
895 union {
896 struct cmsghdr header; /* For alignment */
897 uint8_t buffer[CMSG_SPACE(sizeof(struct in6_pktinfo))];
898 } control;
74b2466e
LP
899 struct msghdr mh = {};
900 struct iovec iov;
74b2466e
LP
901
902 assert(m);
1716f6dc 903 assert(fd >= 0);
b30bf55d 904 assert(destination);
1716f6dc 905 assert(port > 0);
74b2466e
LP
906 assert(p);
907
74b2466e
LP
908 iov.iov_base = DNS_PACKET_DATA(p);
909 iov.iov_len = p->size;
910
b30bf55d 911 sa.in6.sin6_addr = *destination;
1716f6dc 912 sa.in6.sin6_port = htobe16(port),
74b2466e
LP
913 sa.in6.sin6_scope_id = ifindex;
914
915 mh.msg_iov = &iov;
916 mh.msg_iovlen = 1;
917 mh.msg_name = &sa.sa;
918 mh.msg_namelen = sizeof(sa.in6);
919
920 if (ifindex > 0) {
921 struct cmsghdr *cmsg;
922 struct in6_pktinfo *pi;
923
924 zero(control);
925
1716f6dc 926 mh.msg_control = &control;
74b2466e
LP
927 mh.msg_controllen = CMSG_LEN(sizeof(struct in6_pktinfo));
928
929 cmsg = CMSG_FIRSTHDR(&mh);
930 cmsg->cmsg_len = mh.msg_controllen;
931 cmsg->cmsg_level = IPPROTO_IPV6;
932 cmsg->cmsg_type = IPV6_PKTINFO;
933
934 pi = (struct in6_pktinfo*) CMSG_DATA(cmsg);
935 pi->ipi6_ifindex = ifindex;
b30bf55d
LP
936
937 if (source)
938 pi->ipi6_addr = *source;
74b2466e
LP
939 }
940
941 return sendmsg_loop(fd, &mh, 0);
942}
943
b30bf55d
LP
944int manager_send(
945 Manager *m,
946 int fd,
947 int ifindex,
948 int family,
949 const union in_addr_union *destination,
950 uint16_t port,
951 const union in_addr_union *source,
952 DnsPacket *p) {
953
1716f6dc
LP
954 assert(m);
955 assert(fd >= 0);
b30bf55d 956 assert(destination);
1716f6dc
LP
957 assert(port > 0);
958 assert(p);
959
deb3f3d3 960 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 961
1716f6dc 962 if (family == AF_INET)
b30bf55d 963 return manager_ipv4_send(m, fd, ifindex, &destination->in, port, &source->in, p);
2817157b 964 if (family == AF_INET6)
b30bf55d 965 return manager_ipv6_send(m, fd, ifindex, &destination->in6, port, &source->in6, p);
1716f6dc
LP
966
967 return -EAFNOSUPPORT;
968}
969
e1c95994
LP
970uint32_t manager_find_mtu(Manager *m) {
971 uint32_t mtu = 0;
972 Link *l;
973 Iterator i;
974
975 /* If we don't know on which link a DNS packet would be
976 * delivered, let's find the largest MTU that works on all
977 * interfaces we know of */
978
979 HASHMAP_FOREACH(l, m->links, i) {
980 if (l->mtu <= 0)
981 continue;
982
983 if (mtu <= 0 || l->mtu < mtu)
984 mtu = l->mtu;
985 }
986
987 return mtu;
988}
1716f6dc 989
623a4c97 990int manager_find_ifindex(Manager *m, int family, const union in_addr_union *in_addr) {
ec2c5e43
LP
991 LinkAddress *a;
992
993 assert(m);
994
4e945a6f 995 a = manager_find_link_address(m, family, in_addr);
ec2c5e43
LP
996 if (a)
997 return a->link->ifindex;
998
999 return 0;
1000}
1001
eb60f9cd
LP
1002void manager_refresh_rrs(Manager *m) {
1003 Iterator i;
1004 Link *l;
1005
1006 assert(m);
1007
78c6a153
LP
1008 m->llmnr_host_ipv4_key = dns_resource_key_unref(m->llmnr_host_ipv4_key);
1009 m->llmnr_host_ipv6_key = dns_resource_key_unref(m->llmnr_host_ipv6_key);
eb60f9cd
LP
1010
1011 HASHMAP_FOREACH(l, m->links, i) {
1012 link_add_rrs(l, true);
1013 link_add_rrs(l, false);
1014 }
1015}
1016
ec2c5e43
LP
1017int manager_next_hostname(Manager *m) {
1018 const char *p;
556a2294 1019 uint64_t u, a;
78c6a153
LP
1020 char *h, *k;
1021 int r;
623a4c97
LP
1022
1023 assert(m);
1024
78c6a153 1025 p = strchr(m->llmnr_hostname, 0);
ec2c5e43
LP
1026 assert(p);
1027
78c6a153 1028 while (p > m->llmnr_hostname) {
ec2c5e43
LP
1029 if (!strchr("0123456789", p[-1]))
1030 break;
1031
1032 p--;
1033 }
1034
1035 if (*p == 0 || safe_atou64(p, &u) < 0 || u <= 0)
1036 u = 1;
1037
556a2294
LP
1038 /* Add a random number to the old value. This way we can avoid
1039 * that two hosts pick the same hostname, win on IPv4 and lose
1040 * on IPv6 (or vice versa), and pick the same hostname
1041 * replacement hostname, ad infinitum. We still want the
1042 * numbers to go up monotonically, hence we just add a random
1043 * value 1..10 */
1044
1045 random_bytes(&a, sizeof(a));
1046 u += 1 + a % 10;
ec2c5e43 1047
78c6a153 1048 if (asprintf(&h, "%.*s%" PRIu64, (int) (p - m->llmnr_hostname), m->llmnr_hostname, u) < 0)
ec2c5e43
LP
1049 return -ENOMEM;
1050
78c6a153
LP
1051 r = dns_name_concat(h, "local", &k);
1052 if (r < 0) {
1053 free(h);
1054 return r;
1055 }
1056
1057 log_info("Hostname conflict, changing published hostname from '%s' to '%s'.", m->llmnr_hostname, h);
1058
1059 free(m->llmnr_hostname);
1060 m->llmnr_hostname = h;
ec2c5e43 1061
78c6a153
LP
1062 free(m->mdns_hostname);
1063 m->mdns_hostname = k;
ec2c5e43 1064
eb60f9cd 1065 manager_refresh_rrs(m);
623a4c97
LP
1066
1067 return 0;
1068}
ec2c5e43 1069
4e945a6f 1070LinkAddress* manager_find_link_address(Manager *m, int family, const union in_addr_union *in_addr) {
ec2c5e43
LP
1071 Iterator i;
1072 Link *l;
1073
1074 assert(m);
1075
1076 HASHMAP_FOREACH(l, m->links, i) {
1077 LinkAddress *a;
1078
1079 a = link_find_address(l, family, in_addr);
1080 if (a)
1081 return a;
1082 }
1083
1084 return NULL;
1085}
1086
a4076574 1087bool manager_our_packet(Manager *m, DnsPacket *p) {
ec2c5e43
LP
1088 assert(m);
1089 assert(p);
1090
4e945a6f 1091 return !!manager_find_link_address(m, p->family, &p->sender);
ec2c5e43 1092}
4e945a6f 1093
a4076574
LP
1094DnsScope* manager_find_scope(Manager *m, DnsPacket *p) {
1095 Link *l;
1096
1097 assert(m);
1098 assert(p);
1099
1100 l = hashmap_get(m->links, INT_TO_PTR(p->ifindex));
1101 if (!l)
1102 return NULL;
1103
b4f1862d
DM
1104 switch (p->protocol) {
1105 case DNS_PROTOCOL_LLMNR:
a4076574
LP
1106 if (p->family == AF_INET)
1107 return l->llmnr_ipv4_scope;
1108 else if (p->family == AF_INET6)
1109 return l->llmnr_ipv6_scope;
b4f1862d
DM
1110
1111 break;
1112
1113 case DNS_PROTOCOL_MDNS:
1114 if (p->family == AF_INET)
1115 return l->mdns_ipv4_scope;
1116 else if (p->family == AF_INET6)
1117 return l->mdns_ipv6_scope;
1118
1119 break;
1120
1121 default:
1122 break;
a4076574
LP
1123 }
1124
1125 return NULL;
1126}
1127
902bb5d8
LP
1128void manager_verify_all(Manager *m) {
1129 DnsScope *s;
1130
1131 assert(m);
1132
1133 LIST_FOREACH(scopes, s, m->dns_scopes)
1134 dns_zone_verify_all(&s->zone);
1135}
1136
78c6a153 1137int manager_is_own_hostname(Manager *m, const char *name) {
78c6a153
LP
1138 int r;
1139
1140 assert(m);
1141 assert(name);
1142
1143 if (m->llmnr_hostname) {
1144 r = dns_name_equal(name, m->llmnr_hostname);
1145 if (r != 0)
1146 return r;
1147 }
1148
1149 if (m->mdns_hostname)
1150 return dns_name_equal(name, m->mdns_hostname);
1151
1152 return 0;
1153}
1154
9176a57c
LP
1155int manager_compile_dns_servers(Manager *m, OrderedSet **dns) {
1156 DnsServer *s;
1157 Iterator i;
1158 Link *l;
1159 int r;
1160
1161 assert(m);
1162 assert(dns);
1163
1164 r = ordered_set_ensure_allocated(dns, &dns_server_hash_ops);
1165 if (r < 0)
1166 return r;
1167
1168 /* First add the system-wide servers and domains */
1169 LIST_FOREACH(servers, s, m->dns_servers) {
1170 r = ordered_set_put(*dns, s);
1171 if (r == -EEXIST)
1172 continue;
1173 if (r < 0)
1174 return r;
1175 }
1176
1177 /* Then, add the per-link servers */
1178 HASHMAP_FOREACH(l, m->links, i) {
1179 LIST_FOREACH(servers, s, l->dns_servers) {
1180 r = ordered_set_put(*dns, s);
1181 if (r == -EEXIST)
1182 continue;
1183 if (r < 0)
1184 return r;
1185 }
1186 }
1187
1188 /* If we found nothing, add the fallback servers */
1189 if (ordered_set_isempty(*dns)) {
1190 LIST_FOREACH(servers, s, m->fallback_dns_servers) {
1191 r = ordered_set_put(*dns, s);
1192 if (r == -EEXIST)
1193 continue;
1194 if (r < 0)
1195 return r;
1196 }
1197 }
1198
1199 return 0;
1200}
1201
94363cbb
MP
1202/* filter_route is a tri-state:
1203 * < 0: no filtering
1204 * = 0 or false: return only domains which should be used for searching
1205 * > 0 or true: return only domains which are for routing only
1206 */
6f7da49d 1207int manager_compile_search_domains(Manager *m, OrderedSet **domains, int filter_route) {
9176a57c
LP
1208 DnsSearchDomain *d;
1209 Iterator i;
1210 Link *l;
1211 int r;
1212
1213 assert(m);
1214 assert(domains);
1215
1216 r = ordered_set_ensure_allocated(domains, &dns_name_hash_ops);
1217 if (r < 0)
1218 return r;
1219
1220 LIST_FOREACH(domains, d, m->search_domains) {
6f7da49d
LP
1221
1222 if (filter_route >= 0 &&
1223 d->route_only != !!filter_route)
1224 continue;
1225
9176a57c
LP
1226 r = ordered_set_put(*domains, d->name);
1227 if (r == -EEXIST)
1228 continue;
1229 if (r < 0)
1230 return r;
1231 }
1232
1233 HASHMAP_FOREACH(l, m->links, i) {
1234
1235 LIST_FOREACH(domains, d, l->search_domains) {
6f7da49d
LP
1236
1237 if (filter_route >= 0 &&
1238 d->route_only != !!filter_route)
1239 continue;
1240
9176a57c
LP
1241 r = ordered_set_put(*domains, d->name);
1242 if (r == -EEXIST)
1243 continue;
1244 if (r < 0)
1245 return r;
1246 }
1247 }
1248
1249 return 0;
1250}
c69fa7e3
LP
1251
1252DnssecMode manager_get_dnssec_mode(Manager *m) {
1253 assert(m);
1254
1255 if (m->dnssec_mode != _DNSSEC_MODE_INVALID)
1256 return m->dnssec_mode;
1257
1258 return DNSSEC_NO;
1259}
1260
1261bool manager_dnssec_supported(Manager *m) {
1262 DnsServer *server;
1263 Iterator i;
1264 Link *l;
1265
1266 assert(m);
1267
1268 if (manager_get_dnssec_mode(m) == DNSSEC_NO)
1269 return false;
1270
1271 server = manager_get_dns_server(m);
1272 if (server && !dns_server_dnssec_supported(server))
1273 return false;
1274
1275 HASHMAP_FOREACH(l, m->links, i)
1276 if (!link_dnssec_supported(l))
1277 return false;
1278
1279 return true;
1280}
59c5b597
LP
1281
1282void manager_dnssec_verdict(Manager *m, DnssecVerdict verdict, const DnsResourceKey *key) {
1283
1284 assert(verdict >= 0);
1285 assert(verdict < _DNSSEC_VERDICT_MAX);
1286
1287 if (log_get_max_level() >= LOG_DEBUG) {
202b76ae 1288 char s[DNS_RESOURCE_KEY_STRING_MAX];
59c5b597 1289
202b76ae
ZJS
1290 log_debug("Found verdict for lookup %s: %s",
1291 dns_resource_key_to_string(key, s, sizeof s),
1292 dnssec_verdict_to_string(verdict));
59c5b597
LP
1293 }
1294
1295 m->n_dnssec_verdict[verdict]++;
1296}
011696f7
LP
1297
1298bool manager_routable(Manager *m, int family) {
1299 Iterator i;
1300 Link *l;
1301
1302 assert(m);
1303
1304 /* Returns true if the host has at least one interface with a routable address of the specified type */
1305
1306 HASHMAP_FOREACH(l, m->links, i)
1307 if (link_relevant(l, family, false))
1308 return true;
1309
1310 return false;
1311}
ba35662f
LP
1312
1313void manager_flush_caches(Manager *m) {
1314 DnsScope *scope;
1315
1316 assert(m);
1317
1318 LIST_FOREACH(scopes, scope, m->dns_scopes)
1319 dns_cache_flush(&scope->cache);
aac57b35
ZJS
1320
1321 log_info("Flushed all caches.");
ba35662f 1322}
943ef07c
LP
1323
1324void manager_cleanup_saved_user(Manager *m) {
1325 _cleanup_closedir_ DIR *d = NULL;
1326 struct dirent *de;
1327 int r;
1328
1329 assert(m);
1330
1331 /* Clean up all saved per-link files in /run/systemd/resolve/netif/ that don't have a matching interface
1332 * anymore. These files are created to persist settings pushed in by the user via the bus, so that resolved can
1333 * be restarted without losing this data. */
1334
1335 d = opendir("/run/systemd/resolve/netif/");
1336 if (!d) {
1337 if (errno == ENOENT)
1338 return;
1339
1340 log_warning_errno(errno, "Failed to open interface directory: %m");
1341 return;
1342 }
1343
1344 FOREACH_DIRENT_ALL(de, d, log_error_errno(errno, "Failed to read interface directory: %m")) {
1345 _cleanup_free_ char *p = NULL;
1346 int ifindex;
1347 Link *l;
1348
1349 if (!IN_SET(de->d_type, DT_UNKNOWN, DT_REG))
1350 continue;
1351
49bfc877 1352 if (dot_or_dot_dot(de->d_name))
943ef07c
LP
1353 continue;
1354
1355 r = parse_ifindex(de->d_name, &ifindex);
1356 if (r < 0) /* Probably some temporary file from a previous run. Delete it */
1357 goto rm;
1358
1359 l = hashmap_get(m->links, INT_TO_PTR(ifindex));
1360 if (!l) /* link vanished */
1361 goto rm;
1362
1363 if (l->is_managed) /* now managed by networkd, hence the bus settings are useless */
1364 goto rm;
1365
1366 continue;
1367
1368 rm:
1369 p = strappend("/run/systemd/resolve/netif/", de->d_name);
1370 if (!p) {
1371 log_oom();
1372 return;
1373 }
1374
1375 (void) unlink(p);
1376 }
1377}