test: remove unnecessary include
[thirdparty/systemd.git] / src / resolve / resolved-manager.c
CommitLineData
53e1b683 1/* SPDX-License-Identifier: LGPL-2.1+ */
091a364c 2
07630cea
LP
3#include <netinet/in.h>
4#include <poll.h>
0d536673 5#include <stdio_ext.h>
74b2466e 6#include <sys/ioctl.h>
091a364c 7
349cc4a5 8#if HAVE_LIBIDN2
87057e24
ZJS
9#include <idn2.h>
10#endif
11
a2a416f7 12#include "af-list.h"
b5efdb8a 13#include "alloc-util.h"
943ef07c 14#include "dirent-util.h"
07630cea 15#include "dns-domain.h"
3ffd4af2 16#include "fd-util.h"
a5a807e6 17#include "fileio-label.h"
07630cea 18#include "hostname-util.h"
c004493c 19#include "io-util.h"
cb310866 20#include "io-util.h"
07630cea
LP
21#include "netlink-util.h"
22#include "network-internal.h"
822db23c 23#include "ordered-set.h"
6bedfcbb 24#include "parse-util.h"
3df3e884 25#include "random-util.h"
39d8db04 26#include "resolved-bus.h"
07630cea 27#include "resolved-conf.h"
b30bf55d 28#include "resolved-dns-stub.h"
cb310866 29#include "resolved-dnssd.h"
dd0bc0f1 30#include "resolved-etc-hosts.h"
5f402ae8 31#include "resolved-llmnr.h"
07630cea 32#include "resolved-manager.h"
bc7702b0 33#include "resolved-mdns.h"
dd0bc0f1 34#include "resolved-resolv-conf.h"
07630cea 35#include "socket-util.h"
8b43440b 36#include "string-table.h"
07630cea
LP
37#include "string-util.h"
38#include "utf8.h"
74b2466e
LP
39
40#define SEND_TIMEOUT_USEC (200 * USEC_PER_MSEC)
41
1c4baffc 42static int manager_process_link(sd_netlink *rtnl, sd_netlink_message *mm, void *userdata) {
74b2466e
LP
43 Manager *m = userdata;
44 uint16_t type;
45 Link *l;
46 int ifindex, r;
47
48 assert(rtnl);
49 assert(m);
50 assert(mm);
51
1c4baffc 52 r = sd_netlink_message_get_type(mm, &type);
74b2466e
LP
53 if (r < 0)
54 goto fail;
55
56 r = sd_rtnl_message_link_get_ifindex(mm, &ifindex);
57 if (r < 0)
58 goto fail;
59
60 l = hashmap_get(m->links, INT_TO_PTR(ifindex));
61
62 switch (type) {
63
a2a416f7
LP
64 case RTM_NEWLINK:{
65 bool is_new = !l;
74b2466e 66
a2a416f7 67 if (!l) {
74b2466e
LP
68 r = link_new(m, &l, ifindex);
69 if (r < 0)
70 goto fail;
71 }
72
943ef07c 73 r = link_process_rtnl(l, mm);
74b2466e
LP
74 if (r < 0)
75 goto fail;
76
943ef07c 77 r = link_update(l);
21d73c87
LP
78 if (r < 0)
79 goto fail;
80
a2a416f7
LP
81 if (is_new)
82 log_debug("Found new link %i/%s", ifindex, l->name);
83
74b2466e 84 break;
a2a416f7 85 }
74b2466e
LP
86
87 case RTM_DELLINK:
88 if (l) {
a2a416f7 89 log_debug("Removing link %i/%s", l->ifindex, l->name);
943ef07c 90 link_remove_user(l);
74b2466e
LP
91 link_free(l);
92 }
93
94 break;
95 }
96
97 return 0;
98
99fail:
da927ba9 100 log_warning_errno(r, "Failed to process RTNL link message: %m");
74b2466e
LP
101 return 0;
102}
103
1c4baffc 104static int manager_process_address(sd_netlink *rtnl, sd_netlink_message *mm, void *userdata) {
74b2466e
LP
105 Manager *m = userdata;
106 union in_addr_union address;
74b2466e 107 uint16_t type;
0dd25fb9 108 int r, ifindex, family;
74b2466e
LP
109 LinkAddress *a;
110 Link *l;
111
112 assert(rtnl);
113 assert(mm);
114 assert(m);
115
1c4baffc 116 r = sd_netlink_message_get_type(mm, &type);
74b2466e
LP
117 if (r < 0)
118 goto fail;
119
120 r = sd_rtnl_message_addr_get_ifindex(mm, &ifindex);
121 if (r < 0)
122 goto fail;
123
124 l = hashmap_get(m->links, INT_TO_PTR(ifindex));
125 if (!l)
126 return 0;
127
128 r = sd_rtnl_message_addr_get_family(mm, &family);
129 if (r < 0)
130 goto fail;
131
132 switch (family) {
133
134 case AF_INET:
1c4baffc 135 r = sd_netlink_message_read_in_addr(mm, IFA_LOCAL, &address.in);
74b2466e 136 if (r < 0) {
1c4baffc 137 r = sd_netlink_message_read_in_addr(mm, IFA_ADDRESS, &address.in);
74b2466e
LP
138 if (r < 0)
139 goto fail;
140 }
141
142 break;
143
144 case AF_INET6:
1c4baffc 145 r = sd_netlink_message_read_in6_addr(mm, IFA_LOCAL, &address.in6);
74b2466e 146 if (r < 0) {
1c4baffc 147 r = sd_netlink_message_read_in6_addr(mm, IFA_ADDRESS, &address.in6);
74b2466e
LP
148 if (r < 0)
149 goto fail;
150 }
151
152 break;
153
154 default:
155 return 0;
156 }
157
158 a = link_find_address(l, family, &address);
159
160 switch (type) {
161
162 case RTM_NEWADDR:
163
164 if (!a) {
165 r = link_address_new(l, &a, family, &address);
166 if (r < 0)
167 return r;
168 }
169
170 r = link_address_update_rtnl(a, mm);
171 if (r < 0)
172 return r;
173
174 break;
175
176 case RTM_DELADDR:
3e044c49 177 link_address_free(a);
74b2466e
LP
178 break;
179 }
180
181 return 0;
182
183fail:
da927ba9 184 log_warning_errno(r, "Failed to process RTNL address message: %m");
74b2466e
LP
185 return 0;
186}
187
74b2466e 188static int manager_rtnl_listen(Manager *m) {
4afd3348 189 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
1c4baffc 190 sd_netlink_message *i;
74b2466e
LP
191 int r;
192
193 assert(m);
194
cc98b302 195 /* First, subscribe to interfaces coming and going */
1c4baffc 196 r = sd_netlink_open(&m->rtnl);
74b2466e
LP
197 if (r < 0)
198 return r;
199
2d895038 200 r = sd_netlink_attach_event(m->rtnl, m->event, SD_EVENT_PRIORITY_IMPORTANT);
74b2466e
LP
201 if (r < 0)
202 return r;
203
8190a388 204 r = sd_netlink_add_match(m->rtnl, NULL, RTM_NEWLINK, manager_process_link, NULL, m, "resolve-NEWLINK");
74b2466e
LP
205 if (r < 0)
206 return r;
207
8190a388 208 r = sd_netlink_add_match(m->rtnl, NULL, RTM_DELLINK, manager_process_link, NULL, m, "resolve-DELLINK");
74b2466e
LP
209 if (r < 0)
210 return r;
211
8190a388 212 r = sd_netlink_add_match(m->rtnl, NULL, RTM_NEWADDR, manager_process_address, NULL, m, "resolve-NEWADDR");
74b2466e
LP
213 if (r < 0)
214 return r;
091a364c 215
8190a388 216 r = sd_netlink_add_match(m->rtnl, NULL, RTM_DELADDR, manager_process_address, NULL, m, "resolve-DELADDR");
74b2466e
LP
217 if (r < 0)
218 return r;
219
220 /* Then, enumerate all links */
221 r = sd_rtnl_message_new_link(m->rtnl, &req, RTM_GETLINK, 0);
222 if (r < 0)
223 return r;
224
1c4baffc 225 r = sd_netlink_message_request_dump(req, true);
74b2466e
LP
226 if (r < 0)
227 return r;
228
1c4baffc 229 r = sd_netlink_call(m->rtnl, req, 0, &reply);
74b2466e
LP
230 if (r < 0)
231 return r;
232
1c4baffc 233 for (i = reply; i; i = sd_netlink_message_next(i)) {
74b2466e
LP
234 r = manager_process_link(m->rtnl, i, m);
235 if (r < 0)
236 return r;
237 }
238
1c4baffc
TG
239 req = sd_netlink_message_unref(req);
240 reply = sd_netlink_message_unref(reply);
74b2466e
LP
241
242 /* Finally, enumerate all addresses, too */
243 r = sd_rtnl_message_new_addr(m->rtnl, &req, RTM_GETADDR, 0, AF_UNSPEC);
244 if (r < 0)
245 return r;
246
1c4baffc 247 r = sd_netlink_message_request_dump(req, true);
74b2466e
LP
248 if (r < 0)
249 return r;
250
1c4baffc 251 r = sd_netlink_call(m->rtnl, req, 0, &reply);
74b2466e
LP
252 if (r < 0)
253 return r;
254
1c4baffc 255 for (i = reply; i; i = sd_netlink_message_next(i)) {
74b2466e
LP
256 r = manager_process_address(m->rtnl, i, m);
257 if (r < 0)
258 return r;
259 }
260
261 return r;
262}
263
264static int on_network_event(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
265 Manager *m = userdata;
266 Iterator i;
267 Link *l;
268 int r;
269
270 assert(m);
271
272 sd_network_monitor_flush(m->network_monitor);
273
274 HASHMAP_FOREACH(l, m->links, i) {
943ef07c 275 r = link_update(l);
74b2466e 276 if (r < 0)
da927ba9 277 log_warning_errno(r, "Failed to update monitor information for %i: %m", l->ifindex);
74b2466e
LP
278 }
279
7207052d 280 (void) manager_write_resolv_conf(m);
74b2466e
LP
281
282 return 0;
283}
284
285static int manager_network_monitor_listen(Manager *m) {
286 int r, fd, events;
287
288 assert(m);
289
0014a4ad 290 r = sd_network_monitor_new(&m->network_monitor, NULL);
74b2466e
LP
291 if (r < 0)
292 return r;
293
294 fd = sd_network_monitor_get_fd(m->network_monitor);
295 if (fd < 0)
296 return fd;
297
298 events = sd_network_monitor_get_events(m->network_monitor);
299 if (events < 0)
300 return events;
301
302 r = sd_event_add_io(m->event, &m->network_event_source, fd, events, &on_network_event, m);
303 if (r < 0)
2d895038
LP
304 return r;
305
306 r = sd_event_source_set_priority(m->network_event_source, SD_EVENT_PRIORITY_IMPORTANT+5);
307 if (r < 0)
74b2466e
LP
308 return r;
309
aa4a9deb
LP
310 (void) sd_event_source_set_description(m->network_event_source, "network-monitor");
311
74b2466e
LP
312 return 0;
313}
314
e96de0ce 315static int determine_hostname(char **full_hostname, char **llmnr_hostname, char **mdns_hostname) {
eb60f9cd 316 _cleanup_free_ char *h = NULL, *n = NULL;
349cc4a5 317#if HAVE_LIBIDN2
87057e24 318 _cleanup_free_ char *utf8 = NULL;
349cc4a5 319#elif HAVE_LIBIDN
87057e24
ZJS
320 int k;
321#endif
78c6a153 322 char label[DNS_LABEL_MAX];
87057e24
ZJS
323 const char *p, *decoded;
324 int r;
eb60f9cd 325
e96de0ce 326 assert(full_hostname);
78c6a153
LP
327 assert(llmnr_hostname);
328 assert(mdns_hostname);
329
a25b0dc8 330 /* Extract and normalize the first label of the locally configured hostname, and check it's not "localhost". */
eb60f9cd 331
a25b0dc8
LP
332 r = gethostname_strict(&h);
333 if (r < 0)
334 return log_debug_errno(r, "Can't determine system hostname: %m");
eb60f9cd 335
78c6a153 336 p = h;
87057e24 337 r = dns_label_unescape(&p, label, sizeof label);
78c6a153
LP
338 if (r < 0)
339 return log_error_errno(r, "Failed to unescape host name: %m");
baaa35ad
ZJS
340 if (r == 0)
341 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
342 "Couldn't find a single label in hostname.");
78c6a153 343
349cc4a5 344#if HAVE_LIBIDN2
87057e24
ZJS
345 r = idn2_to_unicode_8z8z(label, &utf8, 0);
346 if (r != IDN2_OK)
347 return log_error("Failed to undo IDNA: %s", idn2_strerror(r));
348 assert(utf8_is_valid(utf8));
349
350 r = strlen(utf8);
351 decoded = utf8;
349cc4a5 352#elif HAVE_LIBIDN
87057e24 353 k = dns_label_undo_idna(label, r, label, sizeof label);
78c6a153
LP
354 if (k < 0)
355 return log_error_errno(k, "Failed to undo IDNA: %m");
356 if (k > 0)
357 r = k;
358
baaa35ad
ZJS
359 if (!utf8_is_valid(label))
360 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
361 "System hostname is not UTF-8 clean.");
87057e24
ZJS
362 decoded = label;
363#else
364 decoded = label; /* no decoding */
365#endif
eb60f9cd 366
87057e24 367 r = dns_label_escape_new(decoded, r, &n);
78c6a153
LP
368 if (r < 0)
369 return log_error_errno(r, "Failed to escape host name: %m");
370
baaa35ad
ZJS
371 if (is_localhost(n))
372 return log_debug_errno(SYNTHETIC_ERRNO(EINVAL),
373 "System hostname is 'localhost', ignoring.");
eb60f9cd 374
78c6a153
LP
375 r = dns_name_concat(n, "local", mdns_hostname);
376 if (r < 0)
377 return log_error_errno(r, "Failed to determine mDNS hostname: %m");
378
ae2a15bc
LP
379 *llmnr_hostname = TAKE_PTR(n);
380 *full_hostname = TAKE_PTR(h);
e96de0ce 381
eb60f9cd
LP
382 return 0;
383}
384
a25b0dc8
LP
385static const char *fallback_hostname(void) {
386
387 /* Determine the fall back hostname. For exposing this system to the outside world, we cannot have it to be
388 * "localhost" even if that's the compiled in hostname. In this case, let's revert to "linux" instead. */
389
390 if (is_localhost(FALLBACK_HOSTNAME))
391 return "linux";
392
393 return FALLBACK_HOSTNAME;
394}
395
396static int make_fallback_hostnames(char **full_hostname, char **llmnr_hostname, char **mdns_hostname) {
397 _cleanup_free_ char *n = NULL, *m = NULL;
398 char label[DNS_LABEL_MAX], *h;
399 const char *p;
400 int r;
401
402 assert(full_hostname);
403 assert(llmnr_hostname);
404 assert(mdns_hostname);
405
406 p = fallback_hostname();
407 r = dns_label_unescape(&p, label, sizeof(label));
408 if (r < 0)
409 return log_error_errno(r, "Failed to unescape fallback host name: %m");
410
411 assert(r > 0); /* The fallback hostname must have at least one label */
412
413 r = dns_label_escape_new(label, r, &n);
414 if (r < 0)
415 return log_error_errno(r, "Failed to escape fallback hostname: %m");
416
417 r = dns_name_concat(n, "local", &m);
418 if (r < 0)
419 return log_error_errno(r, "Failed to concatenate mDNS hostname: %m");
420
421 h = strdup(fallback_hostname());
422 if (!h)
423 return log_oom();
424
ae2a15bc
LP
425 *llmnr_hostname = TAKE_PTR(n);
426 *mdns_hostname = TAKE_PTR(m);
a25b0dc8
LP
427
428 *full_hostname = h;
429
430 return 0;
431}
432
eb60f9cd 433static int on_hostname_change(sd_event_source *es, int fd, uint32_t revents, void *userdata) {
e96de0ce 434 _cleanup_free_ char *full_hostname = NULL, *llmnr_hostname = NULL, *mdns_hostname = NULL;
eb60f9cd
LP
435 Manager *m = userdata;
436 int r;
437
438 assert(m);
439
e96de0ce 440 r = determine_hostname(&full_hostname, &llmnr_hostname, &mdns_hostname);
eb60f9cd
LP
441 if (r < 0)
442 return 0; /* ignore invalid hostnames */
443
e96de0ce
LP
444 if (streq(full_hostname, m->full_hostname) &&
445 streq(llmnr_hostname, m->llmnr_hostname) &&
446 streq(mdns_hostname, m->mdns_hostname))
eb60f9cd
LP
447 return 0;
448
e96de0ce 449 log_info("System hostname changed to '%s'.", full_hostname);
78c6a153 450
e96de0ce
LP
451 free_and_replace(m->full_hostname, full_hostname);
452 free_and_replace(m->llmnr_hostname, llmnr_hostname);
453 free_and_replace(m->mdns_hostname, mdns_hostname);
eb60f9cd
LP
454
455 manager_refresh_rrs(m);
456
457 return 0;
458}
459
460static int manager_watch_hostname(Manager *m) {
eb60f9cd
LP
461 int r;
462
463 assert(m);
464
db4a47e9
LP
465 m->hostname_fd = open("/proc/sys/kernel/hostname",
466 O_RDONLY|O_CLOEXEC|O_NONBLOCK|O_NOCTTY);
eb60f9cd 467 if (m->hostname_fd < 0) {
56f64d95 468 log_warning_errno(errno, "Failed to watch hostname: %m");
eb60f9cd
LP
469 return 0;
470 }
471
472 r = sd_event_add_io(m->event, &m->hostname_event_source, m->hostname_fd, 0, on_hostname_change, m);
473 if (r < 0) {
474 if (r == -EPERM)
475 /* kernels prior to 3.2 don't support polling this file. Ignore the failure. */
476 m->hostname_fd = safe_close(m->hostname_fd);
8d3d7072
MS
477 else
478 return log_error_errno(r, "Failed to add hostname event source: %m");
eb60f9cd
LP
479 }
480
aa4a9deb
LP
481 (void) sd_event_source_set_description(m->hostname_event_source, "hostname");
482
e96de0ce 483 r = determine_hostname(&m->full_hostname, &m->llmnr_hostname, &m->mdns_hostname);
eb60f9cd 484 if (r < 0) {
a25b0dc8 485 log_info("Defaulting to hostname '%s'.", fallback_hostname());
78c6a153 486
a25b0dc8
LP
487 r = make_fallback_hostnames(&m->full_hostname, &m->llmnr_hostname, &m->mdns_hostname);
488 if (r < 0)
489 return r;
eb60f9cd 490 } else
e96de0ce 491 log_info("Using system hostname '%s'.", m->full_hostname);
eb60f9cd
LP
492
493 return 0;
494}
495
4d506d6b
LP
496static int manager_sigusr1(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) {
497 _cleanup_free_ char *buffer = NULL;
498 _cleanup_fclose_ FILE *f = NULL;
499 Manager *m = userdata;
cf84484a 500 DnsServer *server;
4d506d6b
LP
501 size_t size = 0;
502 DnsScope *scope;
cf84484a
LP
503 Iterator i;
504 Link *l;
4d506d6b
LP
505
506 assert(s);
507 assert(si);
508 assert(m);
509
510 f = open_memstream(&buffer, &size);
511 if (!f)
512 return log_oom();
513
0d536673
LP
514 (void) __fsetlocking(f, FSETLOCKING_BYCALLER);
515
4d506d6b
LP
516 LIST_FOREACH(scopes, scope, m->dns_scopes)
517 dns_scope_dump(scope, f);
518
cf84484a
LP
519 LIST_FOREACH(servers, server, m->dns_servers)
520 dns_server_dump(server, f);
521 LIST_FOREACH(servers, server, m->fallback_dns_servers)
522 dns_server_dump(server, f);
523 HASHMAP_FOREACH(l, m->links, i)
524 LIST_FOREACH(servers, server, l->dns_servers)
525 dns_server_dump(server, f);
526
4d506d6b
LP
527 if (fflush_and_check(f) < 0)
528 return log_oom();
529
530 log_dump(LOG_INFO, buffer);
531 return 0;
532}
533
bc81447e
LP
534static int manager_sigusr2(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) {
535 Manager *m = userdata;
bc81447e
LP
536
537 assert(s);
538 assert(si);
539 assert(m);
540
ba35662f 541 manager_flush_caches(m);
ba35662f 542
bc81447e
LP
543 return 0;
544}
545
d55b0463
LP
546static int manager_sigrtmin1(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) {
547 Manager *m = userdata;
548
549 assert(s);
550 assert(si);
551 assert(m);
552
553 manager_reset_server_features(m);
554 return 0;
555}
556
091a364c 557int manager_new(Manager **ret) {
74b2466e 558 _cleanup_(manager_freep) Manager *m = NULL;
091a364c
TG
559 int r;
560
c92e531c
LP
561 assert(ret);
562
f55f2dce 563 m = new(Manager, 1);
091a364c
TG
564 if (!m)
565 return -ENOMEM;
566
f55f2dce
YW
567 *m = (Manager) {
568 .llmnr_ipv4_udp_fd = -1,
569 .llmnr_ipv6_udp_fd = -1,
570 .llmnr_ipv4_tcp_fd = -1,
571 .llmnr_ipv6_tcp_fd = -1,
572 .mdns_ipv4_fd = -1,
573 .mdns_ipv6_fd = -1,
574 .dns_stub_udp_fd = -1,
575 .dns_stub_tcp_fd = -1,
576 .hostname_fd = -1,
577
578 .llmnr_support = RESOLVE_SUPPORT_YES,
579 .mdns_support = RESOLVE_SUPPORT_YES,
580 .dnssec_mode = DEFAULT_DNSSEC_MODE,
581 .dns_over_tls_mode = DEFAULT_DNS_OVER_TLS_MODE,
582 .enable_cache = true,
583 .dns_stub_listener_mode = DNS_STUB_LISTENER_UDP,
584 .read_resolv_conf = true,
585 .need_builtin_fallbacks = true,
586 .etc_hosts_last = USEC_INFINITY,
587 .etc_hosts_mtime = USEC_INFINITY,
588 .read_etc_hosts = true,
589 };
091a364c 590
0d2cd476
LP
591 r = dns_trust_anchor_load(&m->trust_anchor);
592 if (r < 0)
593 return r;
594
ad6c0475
LP
595 r = manager_parse_config_file(m);
596 if (r < 0)
5ce497b5 597 log_warning_errno(r, "Failed to parse configuration file: %m");
ad6c0475 598
091a364c
TG
599 r = sd_event_default(&m->event);
600 if (r < 0)
601 return r;
602
1ae17292
YW
603 (void) sd_event_add_signal(m->event, NULL, SIGTERM, NULL, NULL);
604 (void) sd_event_add_signal(m->event, NULL, SIGINT, NULL, NULL);
091a364c 605
1ae17292 606 (void) sd_event_set_watchdog(m->event, true);
091a364c 607
eb60f9cd
LP
608 r = manager_watch_hostname(m);
609 if (r < 0)
610 return r;
611
6501dd31
DR
612 r = dnssd_load(m);
613 if (r < 0)
614 log_warning_errno(r, "Failed to load DNS-SD configuration files: %m");
615
1716f6dc 616 r = dns_scope_new(m, &m->unicast_scope, NULL, DNS_PROTOCOL_DNS, AF_UNSPEC);
74b2466e
LP
617 if (r < 0)
618 return r;
619
620 r = manager_network_monitor_listen(m);
621 if (r < 0)
622 return r;
623
624 r = manager_rtnl_listen(m);
625 if (r < 0)
626 return r;
627
628 r = manager_connect_bus(m);
629 if (r < 0)
630 return r;
631
4d506d6b 632 (void) sd_event_add_signal(m->event, &m->sigusr1_event_source, SIGUSR1, manager_sigusr1, m);
bc81447e 633 (void) sd_event_add_signal(m->event, &m->sigusr2_event_source, SIGUSR2, manager_sigusr2, m);
d55b0463 634 (void) sd_event_add_signal(m->event, &m->sigrtmin1_event_source, SIGRTMIN+1, manager_sigrtmin1, m);
4d506d6b 635
943ef07c
LP
636 manager_cleanup_saved_user(m);
637
1cc6c93a 638 *ret = TAKE_PTR(m);
091a364c
TG
639
640 return 0;
641}
642
edc501d4
LP
643int manager_start(Manager *m) {
644 int r;
645
646 assert(m);
647
b30bf55d
LP
648 r = manager_dns_stub_start(m);
649 if (r < 0)
650 return r;
651
edc501d4
LP
652 return 0;
653}
654
74b2466e
LP
655Manager *manager_free(Manager *m) {
656 Link *l;
6501dd31 657 DnssdService *s;
091a364c
TG
658
659 if (!m)
74b2466e
LP
660 return NULL;
661
4b95f179
LP
662 dns_server_unlink_all(m->dns_servers);
663 dns_server_unlink_all(m->fallback_dns_servers);
a51c1048
LP
664 dns_search_domain_unlink_all(m->search_domains);
665
74b2466e
LP
666 while ((l = hashmap_first(m->links)))
667 link_free(l);
f0e15467
LP
668
669 while (m->dns_queries)
670 dns_query_free(m->dns_queries);
74b2466e 671
cab5b059
LP
672 dns_scope_free(m->unicast_scope);
673
b30bf55d
LP
674 /* At this point only orphaned streams should remain. All others should have been freed already by their
675 * owners */
676 while (m->dns_streams)
677 dns_stream_unref(m->dns_streams);
678
f0e15467
LP
679 hashmap_free(m->links);
680 hashmap_free(m->dns_transactions);
681
096b6773
LP
682 sd_event_source_unref(m->network_event_source);
683 sd_network_monitor_unref(m->network_monitor);
091a364c 684
a564ca2f
LP
685 sd_netlink_unref(m->rtnl);
686 sd_event_source_unref(m->rtnl_event_source);
687
edc501d4 688 manager_llmnr_stop(m);
bc7702b0 689 manager_mdns_stop(m);
b30bf55d 690 manager_dns_stub_stop(m);
623a4c97 691
74b2466e 692 sd_bus_unref(m->bus);
091a364c 693
4d506d6b 694 sd_event_source_unref(m->sigusr1_event_source);
bc81447e 695 sd_event_source_unref(m->sigusr2_event_source);
d55b0463 696 sd_event_source_unref(m->sigrtmin1_event_source);
4d506d6b 697
74b2466e 698 sd_event_unref(m->event);
623a4c97 699
78c6a153
LP
700 dns_resource_key_unref(m->llmnr_host_ipv4_key);
701 dns_resource_key_unref(m->llmnr_host_ipv6_key);
400cb36e
DR
702 dns_resource_key_unref(m->mdns_host_ipv4_key);
703 dns_resource_key_unref(m->mdns_host_ipv6_key);
eb60f9cd 704
eb60f9cd 705 sd_event_source_unref(m->hostname_event_source);
d9fcf2ba 706 safe_close(m->hostname_fd);
e96de0ce
LP
707
708 free(m->full_hostname);
78c6a153
LP
709 free(m->llmnr_hostname);
710 free(m->mdns_hostname);
eb60f9cd 711
6501dd31
DR
712 while ((s = hashmap_first(m->dnssd_services)))
713 dnssd_service_free(s);
714 hashmap_free(m->dnssd_services);
715
0d2cd476 716 dns_trust_anchor_flush(&m->trust_anchor);
dd0bc0f1 717 manager_etc_hosts_flush(m);
0d2cd476 718
6b430fdb 719 return mfree(m);
091a364c
TG
720}
721
1716f6dc 722int manager_recv(Manager *m, int fd, DnsProtocol protocol, DnsPacket **ret) {
74b2466e 723 _cleanup_(dns_packet_unrefp) DnsPacket *p = NULL;
1716f6dc
LP
724 union {
725 struct cmsghdr header; /* For alignment */
40a1eebd 726 uint8_t buffer[CMSG_SPACE(MAXSIZE(struct in_pktinfo, struct in6_pktinfo))
1716f6dc 727 + CMSG_SPACE(int) /* ttl/hoplimit */
623a4c97 728 + EXTRA_CMSG_SPACE /* kernel appears to require extra buffer space */];
1716f6dc
LP
729 } control;
730 union sockaddr_union sa;
74b2466e 731 struct iovec iov;
f55f2dce
YW
732 struct msghdr mh = {
733 .msg_name = &sa.sa,
734 .msg_namelen = sizeof(sa),
735 .msg_iov = &iov,
736 .msg_iovlen = 1,
737 .msg_control = &control,
738 .msg_controllen = sizeof(control),
739 };
740 struct cmsghdr *cmsg;
4edc2c9b
LP
741 ssize_t ms, l;
742 int r;
74b2466e
LP
743
744 assert(m);
1716f6dc 745 assert(fd >= 0);
74b2466e
LP
746 assert(ret);
747
4edc2c9b 748 ms = next_datagram_size_fd(fd);
74b2466e 749 if (ms < 0)
4edc2c9b 750 return ms;
74b2466e 751
51027656 752 r = dns_packet_new(&p, protocol, ms, DNS_PACKET_SIZE_MAX);
74b2466e
LP
753 if (r < 0)
754 return r;
755
cb310866 756 iov = IOVEC_MAKE(DNS_PACKET_DATA(p), p->allocated);
74b2466e 757
a38d9945 758 l = recvmsg(fd, &mh, 0);
74b2466e 759 if (l < 0) {
4c701096 760 if (IN_SET(errno, EAGAIN, EINTR))
74b2466e
LP
761 return 0;
762
763 return -errno;
091a364c 764 }
cb310866
LP
765 if (l == 0)
766 return 0;
091a364c 767
1716f6dc
LP
768 assert(!(mh.msg_flags & MSG_CTRUNC));
769 assert(!(mh.msg_flags & MSG_TRUNC));
770
74b2466e 771 p->size = (size_t) l;
091a364c 772
1716f6dc 773 p->family = sa.sa.sa_family;
623a4c97
LP
774 p->ipproto = IPPROTO_UDP;
775 if (p->family == AF_INET) {
1716f6dc 776 p->sender.in = sa.in.sin_addr;
623a4c97
LP
777 p->sender_port = be16toh(sa.in.sin_port);
778 } else if (p->family == AF_INET6) {
1716f6dc 779 p->sender.in6 = sa.in6.sin6_addr;
623a4c97
LP
780 p->sender_port = be16toh(sa.in6.sin6_port);
781 p->ifindex = sa.in6.sin6_scope_id;
782 } else
1716f6dc 783 return -EAFNOSUPPORT;
74b2466e 784
2a1288ff 785 CMSG_FOREACH(cmsg, &mh) {
74b2466e 786
1716f6dc
LP
787 if (cmsg->cmsg_level == IPPROTO_IPV6) {
788 assert(p->family == AF_INET6);
74b2466e 789
1716f6dc 790 switch (cmsg->cmsg_type) {
74b2466e 791
1716f6dc
LP
792 case IPV6_PKTINFO: {
793 struct in6_pktinfo *i = (struct in6_pktinfo*) CMSG_DATA(cmsg);
74b2466e 794
623a4c97
LP
795 if (p->ifindex <= 0)
796 p->ifindex = i->ipi6_ifindex;
797
1716f6dc
LP
798 p->destination.in6 = i->ipi6_addr;
799 break;
800 }
74b2466e 801
1716f6dc
LP
802 case IPV6_HOPLIMIT:
803 p->ttl = *(int *) CMSG_DATA(cmsg);
804 break;
74b2466e 805
1716f6dc
LP
806 }
807 } else if (cmsg->cmsg_level == IPPROTO_IP) {
808 assert(p->family == AF_INET);
74b2466e 809
1716f6dc 810 switch (cmsg->cmsg_type) {
74b2466e 811
1716f6dc
LP
812 case IP_PKTINFO: {
813 struct in_pktinfo *i = (struct in_pktinfo*) CMSG_DATA(cmsg);
091a364c 814
623a4c97
LP
815 if (p->ifindex <= 0)
816 p->ifindex = i->ipi_ifindex;
817
1716f6dc
LP
818 p->destination.in = i->ipi_addr;
819 break;
820 }
74b2466e 821
623a4c97 822 case IP_TTL:
1716f6dc
LP
823 p->ttl = *(int *) CMSG_DATA(cmsg);
824 break;
825 }
826 }
827 }
74b2466e 828
623a4c97
LP
829 /* The Linux kernel sets the interface index to the loopback
830 * device if the packet came from the local host since it
831 * avoids the routing table in such a case. Let's unset the
832 * interface index in such a case. */
a5f03596 833 if (p->ifindex == LOOPBACK_IFINDEX)
623a4c97
LP
834 p->ifindex = 0;
835
86ad4cd7
TG
836 if (protocol != DNS_PROTOCOL_DNS) {
837 /* If we don't know the interface index still, we look for the
838 * first local interface with a matching address. Yuck! */
839 if (p->ifindex <= 0)
840 p->ifindex = manager_find_ifindex(m, p->family, &p->destination);
841 }
623a4c97 842
1cc6c93a 843 *ret = TAKE_PTR(p);
74b2466e
LP
844
845 return 1;
846}
847
74b2466e
LP
848static int sendmsg_loop(int fd, struct msghdr *mh, int flags) {
849 int r;
850
851 assert(fd >= 0);
852 assert(mh);
853
854 for (;;) {
855 if (sendmsg(fd, mh, flags) >= 0)
856 return 0;
857
858 if (errno == EINTR)
859 continue;
860
861 if (errno != EAGAIN)
862 return -errno;
863
864 r = fd_wait_for_event(fd, POLLOUT, SEND_TIMEOUT_USEC);
865 if (r < 0)
866 return r;
867 if (r == 0)
868 return -ETIMEDOUT;
869 }
870}
871
72290734
TG
872static int write_loop(int fd, void *message, size_t length) {
873 int r;
874
875 assert(fd >= 0);
876 assert(message);
877
878 for (;;) {
879 if (write(fd, message, length) >= 0)
880 return 0;
881
882 if (errno == EINTR)
883 continue;
884
885 if (errno != EAGAIN)
886 return -errno;
887
888 r = fd_wait_for_event(fd, POLLOUT, SEND_TIMEOUT_USEC);
889 if (r < 0)
890 return r;
891 if (r == 0)
892 return -ETIMEDOUT;
893 }
894}
895
896int manager_write(Manager *m, int fd, DnsPacket *p) {
897 int r;
898
deb3f3d3 899 log_debug("Sending %s packet with id %" PRIu16 ".", DNS_PACKET_QR(p) ? "response" : "query", DNS_PACKET_ID(p));
72290734
TG
900
901 r = write_loop(fd, DNS_PACKET_DATA(p), p->size);
902 if (r < 0)
903 return r;
904
905 return 0;
906}
907
b30bf55d
LP
908static int manager_ipv4_send(
909 Manager *m,
910 int fd,
911 int ifindex,
912 const struct in_addr *destination,
913 uint16_t port,
914 const struct in_addr *source,
915 DnsPacket *p) {
1716f6dc
LP
916 union {
917 struct cmsghdr header; /* For alignment */
918 uint8_t buffer[CMSG_SPACE(sizeof(struct in_pktinfo))];
f55f2dce
YW
919 } control = {};
920 union sockaddr_union sa;
74b2466e 921 struct iovec iov;
f55f2dce
YW
922 struct msghdr mh = {
923 .msg_iov = &iov,
924 .msg_iovlen = 1,
925 .msg_name = &sa.sa,
926 .msg_namelen = sizeof(sa.in),
927 };
74b2466e
LP
928
929 assert(m);
1716f6dc 930 assert(fd >= 0);
b30bf55d 931 assert(destination);
1716f6dc 932 assert(port > 0);
74b2466e
LP
933 assert(p);
934
cb310866 935 iov = IOVEC_MAKE(DNS_PACKET_DATA(p), p->size);
091a364c 936
f55f2dce
YW
937 sa = (union sockaddr_union) {
938 .in.sin_family = AF_INET,
939 .in.sin_addr = *destination,
940 .in.sin_port = htobe16(port),
941 };
091a364c 942
74b2466e
LP
943 if (ifindex > 0) {
944 struct cmsghdr *cmsg;
945 struct in_pktinfo *pi;
946
1716f6dc 947 mh.msg_control = &control;
74b2466e
LP
948 mh.msg_controllen = CMSG_LEN(sizeof(struct in_pktinfo));
949
950 cmsg = CMSG_FIRSTHDR(&mh);
951 cmsg->cmsg_len = mh.msg_controllen;
952 cmsg->cmsg_level = IPPROTO_IP;
953 cmsg->cmsg_type = IP_PKTINFO;
954
955 pi = (struct in_pktinfo*) CMSG_DATA(cmsg);
956 pi->ipi_ifindex = ifindex;
b30bf55d
LP
957
958 if (source)
959 pi->ipi_spec_dst = *source;
74b2466e
LP
960 }
961
962 return sendmsg_loop(fd, &mh, 0);
963}
964
b30bf55d
LP
965static int manager_ipv6_send(
966 Manager *m,
967 int fd,
968 int ifindex,
969 const struct in6_addr *destination,
970 uint16_t port,
971 const struct in6_addr *source,
972 DnsPacket *p) {
973
1716f6dc
LP
974 union {
975 struct cmsghdr header; /* For alignment */
976 uint8_t buffer[CMSG_SPACE(sizeof(struct in6_pktinfo))];
f55f2dce
YW
977 } control = {};
978 union sockaddr_union sa;
74b2466e 979 struct iovec iov;
f55f2dce
YW
980 struct msghdr mh = {
981 .msg_iov = &iov,
982 .msg_iovlen = 1,
983 .msg_name = &sa.sa,
984 .msg_namelen = sizeof(sa.in6),
985 };
74b2466e
LP
986
987 assert(m);
1716f6dc 988 assert(fd >= 0);
b30bf55d 989 assert(destination);
1716f6dc 990 assert(port > 0);
74b2466e
LP
991 assert(p);
992
cb310866 993 iov = IOVEC_MAKE(DNS_PACKET_DATA(p), p->size);
74b2466e 994
f55f2dce
YW
995 sa = (union sockaddr_union) {
996 .in6.sin6_family = AF_INET6,
997 .in6.sin6_addr = *destination,
998 .in6.sin6_port = htobe16(port),
999 .in6.sin6_scope_id = ifindex,
1000 };
74b2466e
LP
1001
1002 if (ifindex > 0) {
1003 struct cmsghdr *cmsg;
1004 struct in6_pktinfo *pi;
1005
1716f6dc 1006 mh.msg_control = &control;
74b2466e
LP
1007 mh.msg_controllen = CMSG_LEN(sizeof(struct in6_pktinfo));
1008
1009 cmsg = CMSG_FIRSTHDR(&mh);
1010 cmsg->cmsg_len = mh.msg_controllen;
1011 cmsg->cmsg_level = IPPROTO_IPV6;
1012 cmsg->cmsg_type = IPV6_PKTINFO;
1013
1014 pi = (struct in6_pktinfo*) CMSG_DATA(cmsg);
1015 pi->ipi6_ifindex = ifindex;
b30bf55d
LP
1016
1017 if (source)
1018 pi->ipi6_addr = *source;
74b2466e
LP
1019 }
1020
1021 return sendmsg_loop(fd, &mh, 0);
1022}
1023
b30bf55d
LP
1024int manager_send(
1025 Manager *m,
1026 int fd,
1027 int ifindex,
1028 int family,
1029 const union in_addr_union *destination,
1030 uint16_t port,
1031 const union in_addr_union *source,
1032 DnsPacket *p) {
1033
1716f6dc
LP
1034 assert(m);
1035 assert(fd >= 0);
b30bf55d 1036 assert(destination);
1716f6dc
LP
1037 assert(port > 0);
1038 assert(p);
1039
deb3f3d3 1040 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 1041
1716f6dc 1042 if (family == AF_INET)
25270cf3 1043 return manager_ipv4_send(m, fd, ifindex, &destination->in, port, source ? &source->in : NULL, p);
2817157b 1044 if (family == AF_INET6)
25270cf3 1045 return manager_ipv6_send(m, fd, ifindex, &destination->in6, port, source ? &source->in6 : NULL, p);
1716f6dc
LP
1046
1047 return -EAFNOSUPPORT;
1048}
1049
e1c95994
LP
1050uint32_t manager_find_mtu(Manager *m) {
1051 uint32_t mtu = 0;
1052 Link *l;
1053 Iterator i;
1054
1055 /* If we don't know on which link a DNS packet would be
1056 * delivered, let's find the largest MTU that works on all
1057 * interfaces we know of */
1058
1059 HASHMAP_FOREACH(l, m->links, i) {
1060 if (l->mtu <= 0)
1061 continue;
1062
1063 if (mtu <= 0 || l->mtu < mtu)
1064 mtu = l->mtu;
1065 }
1066
1067 return mtu;
1068}
1716f6dc 1069
623a4c97 1070int manager_find_ifindex(Manager *m, int family, const union in_addr_union *in_addr) {
ec2c5e43
LP
1071 LinkAddress *a;
1072
1073 assert(m);
1074
4e945a6f 1075 a = manager_find_link_address(m, family, in_addr);
ec2c5e43
LP
1076 if (a)
1077 return a->link->ifindex;
1078
1079 return 0;
1080}
1081
eb60f9cd
LP
1082void manager_refresh_rrs(Manager *m) {
1083 Iterator i;
1084 Link *l;
6db6a464 1085 DnssdService *s;
eb60f9cd
LP
1086
1087 assert(m);
1088
78c6a153
LP
1089 m->llmnr_host_ipv4_key = dns_resource_key_unref(m->llmnr_host_ipv4_key);
1090 m->llmnr_host_ipv6_key = dns_resource_key_unref(m->llmnr_host_ipv6_key);
400cb36e
DR
1091 m->mdns_host_ipv4_key = dns_resource_key_unref(m->mdns_host_ipv4_key);
1092 m->mdns_host_ipv6_key = dns_resource_key_unref(m->mdns_host_ipv6_key);
eb60f9cd 1093
6db6a464
DR
1094 if (m->mdns_support == RESOLVE_SUPPORT_YES)
1095 HASHMAP_FOREACH(s, m->dnssd_services, i)
1096 if (dnssd_update_rrs(s) < 0)
1097 log_warning("Failed to refresh DNS-SD service '%s'", s->name);
1098
eb60f9cd
LP
1099 HASHMAP_FOREACH(l, m->links, i) {
1100 link_add_rrs(l, true);
1101 link_add_rrs(l, false);
1102 }
1103}
1104
e7c1b0e4 1105static int manager_next_random_name(const char *old, char **ret_new) {
ec2c5e43 1106 const char *p;
556a2294 1107 uint64_t u, a;
e7c1b0e4 1108 char *n;
623a4c97 1109
e7c1b0e4 1110 p = strchr(old, 0);
ec2c5e43
LP
1111 assert(p);
1112
e7c1b0e4
DR
1113 while (p > old) {
1114 if (!strchr(DIGITS, p[-1]))
ec2c5e43
LP
1115 break;
1116
1117 p--;
1118 }
1119
1120 if (*p == 0 || safe_atou64(p, &u) < 0 || u <= 0)
1121 u = 1;
1122
556a2294
LP
1123 /* Add a random number to the old value. This way we can avoid
1124 * that two hosts pick the same hostname, win on IPv4 and lose
1125 * on IPv6 (or vice versa), and pick the same hostname
1126 * replacement hostname, ad infinitum. We still want the
1127 * numbers to go up monotonically, hence we just add a random
1128 * value 1..10 */
1129
1130 random_bytes(&a, sizeof(a));
1131 u += 1 + a % 10;
ec2c5e43 1132
e7c1b0e4 1133 if (asprintf(&n, "%.*s%" PRIu64, (int) (p - old), old, u) < 0)
ec2c5e43
LP
1134 return -ENOMEM;
1135
e7c1b0e4
DR
1136 *ret_new = n;
1137
1138 return 0;
1139}
1140
1141int manager_next_hostname(Manager *m) {
1142 _cleanup_free_ char *h = NULL, *k = NULL;
1143 int r;
1144
1145 assert(m);
1146
1147 r = manager_next_random_name(m->llmnr_hostname, &h);
1148 if (r < 0)
1149 return r;
1150
78c6a153 1151 r = dns_name_concat(h, "local", &k);
e7c1b0e4 1152 if (r < 0)
78c6a153 1153 return r;
78c6a153
LP
1154
1155 log_info("Hostname conflict, changing published hostname from '%s' to '%s'.", m->llmnr_hostname, h);
1156
e7c1b0e4
DR
1157 free_and_replace(m->llmnr_hostname, h);
1158 free_and_replace(m->mdns_hostname, k);
ec2c5e43 1159
eb60f9cd 1160 manager_refresh_rrs(m);
623a4c97
LP
1161
1162 return 0;
1163}
ec2c5e43 1164
4e945a6f 1165LinkAddress* manager_find_link_address(Manager *m, int family, const union in_addr_union *in_addr) {
ec2c5e43
LP
1166 Iterator i;
1167 Link *l;
1168
1169 assert(m);
1170
1171 HASHMAP_FOREACH(l, m->links, i) {
1172 LinkAddress *a;
1173
1174 a = link_find_address(l, family, in_addr);
1175 if (a)
1176 return a;
1177 }
1178
1179 return NULL;
1180}
1181
a4076574 1182bool manager_our_packet(Manager *m, DnsPacket *p) {
ec2c5e43
LP
1183 assert(m);
1184 assert(p);
1185
4e945a6f 1186 return !!manager_find_link_address(m, p->family, &p->sender);
ec2c5e43 1187}
4e945a6f 1188
a4076574
LP
1189DnsScope* manager_find_scope(Manager *m, DnsPacket *p) {
1190 Link *l;
1191
1192 assert(m);
1193 assert(p);
1194
1195 l = hashmap_get(m->links, INT_TO_PTR(p->ifindex));
1196 if (!l)
1197 return NULL;
1198
b4f1862d
DM
1199 switch (p->protocol) {
1200 case DNS_PROTOCOL_LLMNR:
a4076574
LP
1201 if (p->family == AF_INET)
1202 return l->llmnr_ipv4_scope;
1203 else if (p->family == AF_INET6)
1204 return l->llmnr_ipv6_scope;
b4f1862d
DM
1205
1206 break;
1207
1208 case DNS_PROTOCOL_MDNS:
1209 if (p->family == AF_INET)
1210 return l->mdns_ipv4_scope;
1211 else if (p->family == AF_INET6)
1212 return l->mdns_ipv6_scope;
1213
1214 break;
1215
1216 default:
1217 break;
a4076574
LP
1218 }
1219
1220 return NULL;
1221}
1222
902bb5d8
LP
1223void manager_verify_all(Manager *m) {
1224 DnsScope *s;
1225
1226 assert(m);
1227
1228 LIST_FOREACH(scopes, s, m->dns_scopes)
1229 dns_zone_verify_all(&s->zone);
1230}
1231
78c6a153 1232int manager_is_own_hostname(Manager *m, const char *name) {
78c6a153
LP
1233 int r;
1234
1235 assert(m);
1236 assert(name);
1237
1238 if (m->llmnr_hostname) {
1239 r = dns_name_equal(name, m->llmnr_hostname);
1240 if (r != 0)
1241 return r;
1242 }
1243
e96de0ce
LP
1244 if (m->mdns_hostname) {
1245 r = dns_name_equal(name, m->mdns_hostname);
1246 if (r != 0)
1247 return r;
1248 }
1249
1250 if (m->full_hostname)
1251 return dns_name_equal(name, m->full_hostname);
78c6a153
LP
1252
1253 return 0;
1254}
1255
9176a57c
LP
1256int manager_compile_dns_servers(Manager *m, OrderedSet **dns) {
1257 DnsServer *s;
1258 Iterator i;
1259 Link *l;
1260 int r;
1261
1262 assert(m);
1263 assert(dns);
1264
1265 r = ordered_set_ensure_allocated(dns, &dns_server_hash_ops);
1266 if (r < 0)
1267 return r;
1268
1269 /* First add the system-wide servers and domains */
1270 LIST_FOREACH(servers, s, m->dns_servers) {
1271 r = ordered_set_put(*dns, s);
1272 if (r == -EEXIST)
1273 continue;
1274 if (r < 0)
1275 return r;
1276 }
1277
1278 /* Then, add the per-link servers */
1279 HASHMAP_FOREACH(l, m->links, i) {
1280 LIST_FOREACH(servers, s, l->dns_servers) {
1281 r = ordered_set_put(*dns, s);
1282 if (r == -EEXIST)
1283 continue;
1284 if (r < 0)
1285 return r;
1286 }
1287 }
1288
1289 /* If we found nothing, add the fallback servers */
1290 if (ordered_set_isempty(*dns)) {
1291 LIST_FOREACH(servers, s, m->fallback_dns_servers) {
1292 r = ordered_set_put(*dns, s);
1293 if (r == -EEXIST)
1294 continue;
1295 if (r < 0)
1296 return r;
1297 }
1298 }
1299
1300 return 0;
1301}
1302
94363cbb
MP
1303/* filter_route is a tri-state:
1304 * < 0: no filtering
1305 * = 0 or false: return only domains which should be used for searching
1306 * > 0 or true: return only domains which are for routing only
1307 */
6f7da49d 1308int manager_compile_search_domains(Manager *m, OrderedSet **domains, int filter_route) {
9176a57c
LP
1309 DnsSearchDomain *d;
1310 Iterator i;
1311 Link *l;
1312 int r;
1313
1314 assert(m);
1315 assert(domains);
1316
1317 r = ordered_set_ensure_allocated(domains, &dns_name_hash_ops);
1318 if (r < 0)
1319 return r;
1320
1321 LIST_FOREACH(domains, d, m->search_domains) {
6f7da49d
LP
1322
1323 if (filter_route >= 0 &&
1324 d->route_only != !!filter_route)
1325 continue;
1326
9176a57c
LP
1327 r = ordered_set_put(*domains, d->name);
1328 if (r == -EEXIST)
1329 continue;
1330 if (r < 0)
1331 return r;
1332 }
1333
1334 HASHMAP_FOREACH(l, m->links, i) {
1335
1336 LIST_FOREACH(domains, d, l->search_domains) {
6f7da49d
LP
1337
1338 if (filter_route >= 0 &&
1339 d->route_only != !!filter_route)
1340 continue;
1341
9176a57c
LP
1342 r = ordered_set_put(*domains, d->name);
1343 if (r == -EEXIST)
1344 continue;
1345 if (r < 0)
1346 return r;
1347 }
1348 }
1349
1350 return 0;
1351}
c69fa7e3
LP
1352
1353DnssecMode manager_get_dnssec_mode(Manager *m) {
1354 assert(m);
1355
1356 if (m->dnssec_mode != _DNSSEC_MODE_INVALID)
1357 return m->dnssec_mode;
1358
1359 return DNSSEC_NO;
1360}
1361
1362bool manager_dnssec_supported(Manager *m) {
1363 DnsServer *server;
1364 Iterator i;
1365 Link *l;
1366
1367 assert(m);
1368
1369 if (manager_get_dnssec_mode(m) == DNSSEC_NO)
1370 return false;
1371
1372 server = manager_get_dns_server(m);
1373 if (server && !dns_server_dnssec_supported(server))
1374 return false;
1375
1376 HASHMAP_FOREACH(l, m->links, i)
1377 if (!link_dnssec_supported(l))
1378 return false;
1379
1380 return true;
1381}
59c5b597 1382
c9299be2 1383DnsOverTlsMode manager_get_dns_over_tls_mode(Manager *m) {
5d67a7ae
IT
1384 assert(m);
1385
c9299be2
IT
1386 if (m->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
1387 return m->dns_over_tls_mode;
5d67a7ae 1388
c9299be2 1389 return DNS_OVER_TLS_NO;
5d67a7ae
IT
1390}
1391
59c5b597
LP
1392void manager_dnssec_verdict(Manager *m, DnssecVerdict verdict, const DnsResourceKey *key) {
1393
1394 assert(verdict >= 0);
1395 assert(verdict < _DNSSEC_VERDICT_MAX);
1396
f1d34068 1397 if (DEBUG_LOGGING) {
202b76ae 1398 char s[DNS_RESOURCE_KEY_STRING_MAX];
59c5b597 1399
202b76ae
ZJS
1400 log_debug("Found verdict for lookup %s: %s",
1401 dns_resource_key_to_string(key, s, sizeof s),
1402 dnssec_verdict_to_string(verdict));
59c5b597
LP
1403 }
1404
1405 m->n_dnssec_verdict[verdict]++;
1406}
011696f7
LP
1407
1408bool manager_routable(Manager *m, int family) {
1409 Iterator i;
1410 Link *l;
1411
1412 assert(m);
1413
1414 /* Returns true if the host has at least one interface with a routable address of the specified type */
1415
1416 HASHMAP_FOREACH(l, m->links, i)
1417 if (link_relevant(l, family, false))
1418 return true;
1419
1420 return false;
1421}
ba35662f
LP
1422
1423void manager_flush_caches(Manager *m) {
1424 DnsScope *scope;
1425
1426 assert(m);
1427
1428 LIST_FOREACH(scopes, scope, m->dns_scopes)
1429 dns_cache_flush(&scope->cache);
aac57b35
ZJS
1430
1431 log_info("Flushed all caches.");
ba35662f 1432}
943ef07c 1433
59c0fd0e
LP
1434void manager_reset_server_features(Manager *m) {
1435 Iterator i;
1436 Link *l;
1437
1438 dns_server_reset_features_all(m->dns_servers);
1439 dns_server_reset_features_all(m->fallback_dns_servers);
1440
1441 HASHMAP_FOREACH(l, m->links, i)
1442 dns_server_reset_features_all(l->dns_servers);
1443
1444 log_info("Resetting learnt feature levels on all servers.");
1445}
1446
943ef07c
LP
1447void manager_cleanup_saved_user(Manager *m) {
1448 _cleanup_closedir_ DIR *d = NULL;
1449 struct dirent *de;
1450 int r;
1451
1452 assert(m);
1453
1454 /* Clean up all saved per-link files in /run/systemd/resolve/netif/ that don't have a matching interface
1455 * anymore. These files are created to persist settings pushed in by the user via the bus, so that resolved can
1456 * be restarted without losing this data. */
1457
1458 d = opendir("/run/systemd/resolve/netif/");
1459 if (!d) {
1460 if (errno == ENOENT)
1461 return;
1462
1463 log_warning_errno(errno, "Failed to open interface directory: %m");
1464 return;
1465 }
1466
1467 FOREACH_DIRENT_ALL(de, d, log_error_errno(errno, "Failed to read interface directory: %m")) {
1468 _cleanup_free_ char *p = NULL;
1469 int ifindex;
1470 Link *l;
1471
1472 if (!IN_SET(de->d_type, DT_UNKNOWN, DT_REG))
1473 continue;
1474
49bfc877 1475 if (dot_or_dot_dot(de->d_name))
943ef07c
LP
1476 continue;
1477
1478 r = parse_ifindex(de->d_name, &ifindex);
1479 if (r < 0) /* Probably some temporary file from a previous run. Delete it */
1480 goto rm;
1481
1482 l = hashmap_get(m->links, INT_TO_PTR(ifindex));
1483 if (!l) /* link vanished */
1484 goto rm;
1485
1486 if (l->is_managed) /* now managed by networkd, hence the bus settings are useless */
1487 goto rm;
1488
1489 continue;
1490
1491 rm:
1492 p = strappend("/run/systemd/resolve/netif/", de->d_name);
1493 if (!p) {
1494 log_oom();
1495 return;
1496 }
1497
1498 (void) unlink(p);
1499 }
1500}
e7c1b0e4
DR
1501
1502bool manager_next_dnssd_names(Manager *m) {
1503 Iterator i;
1504 DnssdService *s;
1505 bool tried = false;
1506 int r;
1507
1508 assert(m);
1509
1510 HASHMAP_FOREACH(s, m->dnssd_services, i) {
1511 _cleanup_free_ char * new_name = NULL;
1512
1513 if (!s->withdrawn)
1514 continue;
1515
1516 r = manager_next_random_name(s->name_template, &new_name);
1517 if (r < 0) {
1518 log_warning_errno(r, "Failed to get new name for service '%s': %m", s->name);
1519 continue;
1520 }
1521
1522 free_and_replace(s->name_template, new_name);
1523
1524 s->withdrawn = false;
1525
1526 tried = true;
1527 }
1528
1529 if (tried)
1530 manager_refresh_rrs(m);
1531
1532 return tried;
1533}