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Commit | Line | Data |
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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
091a364c | 2 | |
ca78ad1d | 3 | #include <fcntl.h> |
07630cea LP |
4 | #include <netinet/in.h> |
5 | #include <poll.h> | |
74b2466e | 6 | #include <sys/ioctl.h> |
ca78ad1d ZJS |
7 | #include <sys/stat.h> |
8 | #include <sys/types.h> | |
9 | #include <unistd.h> | |
091a364c | 10 | |
a2a416f7 | 11 | #include "af-list.h" |
b5efdb8a | 12 | #include "alloc-util.h" |
269e4d2d | 13 | #include "bus-polkit.h" |
943ef07c | 14 | #include "dirent-util.h" |
07630cea | 15 | #include "dns-domain.h" |
3ffd4af2 | 16 | #include "fd-util.h" |
ee228be1 | 17 | #include "fileio.h" |
07630cea | 18 | #include "hostname-util.h" |
4917e7c7 | 19 | #include "idn-util.h" |
c004493c | 20 | #include "io-util.h" |
ef118d00 | 21 | #include "missing_network.h" |
07630cea LP |
22 | #include "netlink-util.h" |
23 | #include "network-internal.h" | |
822db23c | 24 | #include "ordered-set.h" |
6bedfcbb | 25 | #include "parse-util.h" |
3df3e884 | 26 | #include "random-util.h" |
39d8db04 | 27 | #include "resolved-bus.h" |
07630cea | 28 | #include "resolved-conf.h" |
b30bf55d | 29 | #include "resolved-dns-stub.h" |
cb310866 | 30 | #include "resolved-dnssd.h" |
dd0bc0f1 | 31 | #include "resolved-etc-hosts.h" |
5f402ae8 | 32 | #include "resolved-llmnr.h" |
07630cea | 33 | #include "resolved-manager.h" |
bc7702b0 | 34 | #include "resolved-mdns.h" |
dd0bc0f1 | 35 | #include "resolved-resolv-conf.h" |
9581bb84 | 36 | #include "resolved-varlink.h" |
07630cea | 37 | #include "socket-util.h" |
8b43440b | 38 | #include "string-table.h" |
07630cea LP |
39 | #include "string-util.h" |
40 | #include "utf8.h" | |
74b2466e LP |
41 | |
42 | #define SEND_TIMEOUT_USEC (200 * USEC_PER_MSEC) | |
43 | ||
1c4baffc | 44 | static int manager_process_link(sd_netlink *rtnl, sd_netlink_message *mm, void *userdata) { |
74b2466e LP |
45 | Manager *m = userdata; |
46 | uint16_t type; | |
47 | Link *l; | |
48 | int ifindex, r; | |
49 | ||
50 | assert(rtnl); | |
51 | assert(m); | |
52 | assert(mm); | |
53 | ||
1c4baffc | 54 | r = sd_netlink_message_get_type(mm, &type); |
74b2466e LP |
55 | if (r < 0) |
56 | goto fail; | |
57 | ||
58 | r = sd_rtnl_message_link_get_ifindex(mm, &ifindex); | |
59 | if (r < 0) | |
60 | goto fail; | |
61 | ||
62 | l = hashmap_get(m->links, INT_TO_PTR(ifindex)); | |
63 | ||
64 | switch (type) { | |
65 | ||
a2a416f7 LP |
66 | case RTM_NEWLINK:{ |
67 | bool is_new = !l; | |
74b2466e | 68 | |
a2a416f7 | 69 | if (!l) { |
74b2466e LP |
70 | r = link_new(m, &l, ifindex); |
71 | if (r < 0) | |
72 | goto fail; | |
73 | } | |
74 | ||
943ef07c | 75 | r = link_process_rtnl(l, mm); |
74b2466e LP |
76 | if (r < 0) |
77 | goto fail; | |
78 | ||
943ef07c | 79 | r = link_update(l); |
21d73c87 LP |
80 | if (r < 0) |
81 | goto fail; | |
82 | ||
a2a416f7 | 83 | if (is_new) |
6ff79f76 | 84 | log_debug("Found new link %i/%s", ifindex, l->ifname); |
a2a416f7 | 85 | |
74b2466e | 86 | break; |
a2a416f7 | 87 | } |
74b2466e LP |
88 | |
89 | case RTM_DELLINK: | |
90 | if (l) { | |
6ff79f76 | 91 | log_debug("Removing link %i/%s", l->ifindex, l->ifname); |
943ef07c | 92 | link_remove_user(l); |
74b2466e LP |
93 | link_free(l); |
94 | } | |
95 | ||
96 | break; | |
97 | } | |
98 | ||
99 | return 0; | |
100 | ||
101 | fail: | |
da927ba9 | 102 | log_warning_errno(r, "Failed to process RTNL link message: %m"); |
74b2466e LP |
103 | return 0; |
104 | } | |
105 | ||
1c4baffc | 106 | static int manager_process_address(sd_netlink *rtnl, sd_netlink_message *mm, void *userdata) { |
74b2466e LP |
107 | Manager *m = userdata; |
108 | union in_addr_union address; | |
74b2466e | 109 | uint16_t type; |
0dd25fb9 | 110 | int r, ifindex, family; |
74b2466e LP |
111 | LinkAddress *a; |
112 | Link *l; | |
113 | ||
114 | assert(rtnl); | |
115 | assert(mm); | |
116 | assert(m); | |
117 | ||
1c4baffc | 118 | r = sd_netlink_message_get_type(mm, &type); |
74b2466e LP |
119 | if (r < 0) |
120 | goto fail; | |
121 | ||
122 | r = sd_rtnl_message_addr_get_ifindex(mm, &ifindex); | |
123 | if (r < 0) | |
124 | goto fail; | |
125 | ||
126 | l = hashmap_get(m->links, INT_TO_PTR(ifindex)); | |
127 | if (!l) | |
128 | return 0; | |
129 | ||
130 | r = sd_rtnl_message_addr_get_family(mm, &family); | |
131 | if (r < 0) | |
132 | goto fail; | |
133 | ||
134 | switch (family) { | |
135 | ||
136 | case AF_INET: | |
1c4baffc | 137 | r = sd_netlink_message_read_in_addr(mm, IFA_LOCAL, &address.in); |
74b2466e | 138 | if (r < 0) { |
1c4baffc | 139 | r = sd_netlink_message_read_in_addr(mm, IFA_ADDRESS, &address.in); |
74b2466e LP |
140 | if (r < 0) |
141 | goto fail; | |
142 | } | |
143 | ||
144 | break; | |
145 | ||
146 | case AF_INET6: | |
1c4baffc | 147 | r = sd_netlink_message_read_in6_addr(mm, IFA_LOCAL, &address.in6); |
74b2466e | 148 | if (r < 0) { |
1c4baffc | 149 | r = sd_netlink_message_read_in6_addr(mm, IFA_ADDRESS, &address.in6); |
74b2466e LP |
150 | if (r < 0) |
151 | goto fail; | |
152 | } | |
153 | ||
154 | break; | |
155 | ||
156 | default: | |
157 | return 0; | |
158 | } | |
159 | ||
160 | a = link_find_address(l, family, &address); | |
161 | ||
162 | switch (type) { | |
163 | ||
164 | case RTM_NEWADDR: | |
165 | ||
166 | if (!a) { | |
167 | r = link_address_new(l, &a, family, &address); | |
168 | if (r < 0) | |
169 | return r; | |
170 | } | |
171 | ||
172 | r = link_address_update_rtnl(a, mm); | |
173 | if (r < 0) | |
174 | return r; | |
175 | ||
176 | break; | |
177 | ||
178 | case RTM_DELADDR: | |
3e044c49 | 179 | link_address_free(a); |
74b2466e LP |
180 | break; |
181 | } | |
182 | ||
183 | return 0; | |
184 | ||
185 | fail: | |
da927ba9 | 186 | log_warning_errno(r, "Failed to process RTNL address message: %m"); |
74b2466e LP |
187 | return 0; |
188 | } | |
189 | ||
74b2466e | 190 | static int manager_rtnl_listen(Manager *m) { |
4afd3348 | 191 | _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL; |
1c4baffc | 192 | sd_netlink_message *i; |
74b2466e LP |
193 | int r; |
194 | ||
195 | assert(m); | |
196 | ||
cc98b302 | 197 | /* First, subscribe to interfaces coming and going */ |
1c4baffc | 198 | r = sd_netlink_open(&m->rtnl); |
74b2466e LP |
199 | if (r < 0) |
200 | return r; | |
201 | ||
2d895038 | 202 | r = sd_netlink_attach_event(m->rtnl, m->event, SD_EVENT_PRIORITY_IMPORTANT); |
74b2466e LP |
203 | if (r < 0) |
204 | return r; | |
205 | ||
8190a388 | 206 | r = sd_netlink_add_match(m->rtnl, NULL, RTM_NEWLINK, manager_process_link, NULL, m, "resolve-NEWLINK"); |
74b2466e LP |
207 | if (r < 0) |
208 | return r; | |
209 | ||
8190a388 | 210 | r = sd_netlink_add_match(m->rtnl, NULL, RTM_DELLINK, manager_process_link, NULL, m, "resolve-DELLINK"); |
74b2466e LP |
211 | if (r < 0) |
212 | return r; | |
213 | ||
8190a388 | 214 | r = sd_netlink_add_match(m->rtnl, NULL, RTM_NEWADDR, manager_process_address, NULL, m, "resolve-NEWADDR"); |
74b2466e LP |
215 | if (r < 0) |
216 | return r; | |
091a364c | 217 | |
8190a388 | 218 | r = sd_netlink_add_match(m->rtnl, NULL, RTM_DELADDR, manager_process_address, NULL, m, "resolve-DELADDR"); |
74b2466e LP |
219 | if (r < 0) |
220 | return r; | |
221 | ||
222 | /* Then, enumerate all links */ | |
223 | r = sd_rtnl_message_new_link(m->rtnl, &req, RTM_GETLINK, 0); | |
224 | if (r < 0) | |
225 | return r; | |
226 | ||
1c4baffc | 227 | r = sd_netlink_message_request_dump(req, true); |
74b2466e LP |
228 | if (r < 0) |
229 | return r; | |
230 | ||
1c4baffc | 231 | r = sd_netlink_call(m->rtnl, req, 0, &reply); |
74b2466e LP |
232 | if (r < 0) |
233 | return r; | |
234 | ||
1c4baffc | 235 | for (i = reply; i; i = sd_netlink_message_next(i)) { |
74b2466e LP |
236 | r = manager_process_link(m->rtnl, i, m); |
237 | if (r < 0) | |
238 | return r; | |
239 | } | |
240 | ||
1c4baffc TG |
241 | req = sd_netlink_message_unref(req); |
242 | reply = sd_netlink_message_unref(reply); | |
74b2466e LP |
243 | |
244 | /* Finally, enumerate all addresses, too */ | |
245 | r = sd_rtnl_message_new_addr(m->rtnl, &req, RTM_GETADDR, 0, AF_UNSPEC); | |
246 | if (r < 0) | |
247 | return r; | |
248 | ||
1c4baffc | 249 | r = sd_netlink_message_request_dump(req, true); |
74b2466e LP |
250 | if (r < 0) |
251 | return r; | |
252 | ||
1c4baffc | 253 | r = sd_netlink_call(m->rtnl, req, 0, &reply); |
74b2466e LP |
254 | if (r < 0) |
255 | return r; | |
256 | ||
1c4baffc | 257 | for (i = reply; i; i = sd_netlink_message_next(i)) { |
74b2466e LP |
258 | r = manager_process_address(m->rtnl, i, m); |
259 | if (r < 0) | |
260 | return r; | |
261 | } | |
262 | ||
263 | return r; | |
264 | } | |
265 | ||
266 | static int on_network_event(sd_event_source *s, int fd, uint32_t revents, void *userdata) { | |
267 | Manager *m = userdata; | |
74b2466e LP |
268 | Link *l; |
269 | int r; | |
270 | ||
271 | assert(m); | |
272 | ||
273 | sd_network_monitor_flush(m->network_monitor); | |
274 | ||
90e74a66 | 275 | HASHMAP_FOREACH(l, m->links) { |
943ef07c | 276 | r = link_update(l); |
74b2466e | 277 | if (r < 0) |
da927ba9 | 278 | log_warning_errno(r, "Failed to update monitor information for %i: %m", l->ifindex); |
74b2466e LP |
279 | } |
280 | ||
7207052d | 281 | (void) manager_write_resolv_conf(m); |
5f3340ca | 282 | (void) manager_send_changed(m, "DNS"); |
74b2466e LP |
283 | |
284 | return 0; | |
285 | } | |
286 | ||
287 | static int manager_network_monitor_listen(Manager *m) { | |
288 | int r, fd, events; | |
289 | ||
290 | assert(m); | |
291 | ||
0014a4ad | 292 | r = sd_network_monitor_new(&m->network_monitor, NULL); |
74b2466e LP |
293 | if (r < 0) |
294 | return r; | |
295 | ||
296 | fd = sd_network_monitor_get_fd(m->network_monitor); | |
297 | if (fd < 0) | |
298 | return fd; | |
299 | ||
300 | events = sd_network_monitor_get_events(m->network_monitor); | |
301 | if (events < 0) | |
302 | return events; | |
303 | ||
304 | r = sd_event_add_io(m->event, &m->network_event_source, fd, events, &on_network_event, m); | |
305 | if (r < 0) | |
2d895038 LP |
306 | return r; |
307 | ||
308 | r = sd_event_source_set_priority(m->network_event_source, SD_EVENT_PRIORITY_IMPORTANT+5); | |
309 | if (r < 0) | |
74b2466e LP |
310 | return r; |
311 | ||
aa4a9deb LP |
312 | (void) sd_event_source_set_description(m->network_event_source, "network-monitor"); |
313 | ||
74b2466e LP |
314 | return 0; |
315 | } | |
316 | ||
e96de0ce | 317 | static int determine_hostname(char **full_hostname, char **llmnr_hostname, char **mdns_hostname) { |
eb60f9cd | 318 | _cleanup_free_ char *h = NULL, *n = NULL; |
349cc4a5 | 319 | #if HAVE_LIBIDN2 |
87057e24 | 320 | _cleanup_free_ char *utf8 = NULL; |
349cc4a5 | 321 | #elif HAVE_LIBIDN |
87057e24 ZJS |
322 | int k; |
323 | #endif | |
78c6a153 | 324 | char label[DNS_LABEL_MAX]; |
87057e24 ZJS |
325 | const char *p, *decoded; |
326 | int r; | |
eb60f9cd | 327 | |
e96de0ce | 328 | assert(full_hostname); |
78c6a153 LP |
329 | assert(llmnr_hostname); |
330 | assert(mdns_hostname); | |
331 | ||
a25b0dc8 | 332 | /* Extract and normalize the first label of the locally configured hostname, and check it's not "localhost". */ |
eb60f9cd | 333 | |
a25b0dc8 LP |
334 | r = gethostname_strict(&h); |
335 | if (r < 0) | |
336 | return log_debug_errno(r, "Can't determine system hostname: %m"); | |
eb60f9cd | 337 | |
78c6a153 | 338 | p = h; |
7470cc4c | 339 | r = dns_label_unescape(&p, label, sizeof label, 0); |
78c6a153 | 340 | if (r < 0) |
38b38500 | 341 | return log_error_errno(r, "Failed to unescape hostname: %m"); |
baaa35ad ZJS |
342 | if (r == 0) |
343 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), | |
344 | "Couldn't find a single label in hostname."); | |
78c6a153 | 345 | |
4917e7c7 LP |
346 | #if HAVE_LIBIDN || HAVE_LIBIDN2 |
347 | r = dlopen_idn(); | |
348 | if (r < 0) { | |
349 | log_debug_errno(r, "Failed to initialize IDN support, ignoring: %m"); | |
350 | decoded = label; /* no decoding */ | |
351 | } else | |
352 | #endif | |
353 | { | |
349cc4a5 | 354 | #if HAVE_LIBIDN2 |
4917e7c7 LP |
355 | r = sym_idn2_to_unicode_8z8z(label, &utf8, 0); |
356 | if (r != IDN2_OK) | |
357 | return log_error_errno(SYNTHETIC_ERRNO(EUCLEAN), | |
358 | "Failed to undo IDNA: %s", sym_idn2_strerror(r)); | |
359 | assert(utf8_is_valid(utf8)); | |
360 | ||
361 | r = strlen(utf8); | |
362 | decoded = utf8; | |
349cc4a5 | 363 | #elif HAVE_LIBIDN |
4917e7c7 LP |
364 | k = dns_label_undo_idna(label, r, label, sizeof label); |
365 | if (k < 0) | |
366 | return log_error_errno(k, "Failed to undo IDNA: %m"); | |
367 | if (k > 0) | |
368 | r = k; | |
369 | ||
370 | if (!utf8_is_valid(label)) | |
371 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), | |
372 | "System hostname is not UTF-8 clean."); | |
373 | decoded = label; | |
87057e24 | 374 | #else |
4917e7c7 | 375 | decoded = label; /* no decoding */ |
87057e24 | 376 | #endif |
4917e7c7 | 377 | } |
eb60f9cd | 378 | |
87057e24 | 379 | r = dns_label_escape_new(decoded, r, &n); |
78c6a153 | 380 | if (r < 0) |
38b38500 | 381 | return log_error_errno(r, "Failed to escape hostname: %m"); |
78c6a153 | 382 | |
baaa35ad ZJS |
383 | if (is_localhost(n)) |
384 | return log_debug_errno(SYNTHETIC_ERRNO(EINVAL), | |
385 | "System hostname is 'localhost', ignoring."); | |
eb60f9cd | 386 | |
7470cc4c | 387 | r = dns_name_concat(n, "local", 0, mdns_hostname); |
78c6a153 LP |
388 | if (r < 0) |
389 | return log_error_errno(r, "Failed to determine mDNS hostname: %m"); | |
390 | ||
ae2a15bc LP |
391 | *llmnr_hostname = TAKE_PTR(n); |
392 | *full_hostname = TAKE_PTR(h); | |
e96de0ce | 393 | |
eb60f9cd LP |
394 | return 0; |
395 | } | |
396 | ||
a25b0dc8 LP |
397 | static const char *fallback_hostname(void) { |
398 | ||
399 | /* Determine the fall back hostname. For exposing this system to the outside world, we cannot have it to be | |
400 | * "localhost" even if that's the compiled in hostname. In this case, let's revert to "linux" instead. */ | |
401 | ||
402 | if (is_localhost(FALLBACK_HOSTNAME)) | |
403 | return "linux"; | |
404 | ||
405 | return FALLBACK_HOSTNAME; | |
406 | } | |
407 | ||
408 | static int make_fallback_hostnames(char **full_hostname, char **llmnr_hostname, char **mdns_hostname) { | |
409 | _cleanup_free_ char *n = NULL, *m = NULL; | |
410 | char label[DNS_LABEL_MAX], *h; | |
411 | const char *p; | |
412 | int r; | |
413 | ||
414 | assert(full_hostname); | |
415 | assert(llmnr_hostname); | |
416 | assert(mdns_hostname); | |
417 | ||
418 | p = fallback_hostname(); | |
7470cc4c | 419 | r = dns_label_unescape(&p, label, sizeof label, 0); |
a25b0dc8 | 420 | if (r < 0) |
38b38500 | 421 | return log_error_errno(r, "Failed to unescape fallback hostname: %m"); |
a25b0dc8 LP |
422 | |
423 | assert(r > 0); /* The fallback hostname must have at least one label */ | |
424 | ||
425 | r = dns_label_escape_new(label, r, &n); | |
426 | if (r < 0) | |
427 | return log_error_errno(r, "Failed to escape fallback hostname: %m"); | |
428 | ||
7470cc4c | 429 | r = dns_name_concat(n, "local", 0, &m); |
a25b0dc8 LP |
430 | if (r < 0) |
431 | return log_error_errno(r, "Failed to concatenate mDNS hostname: %m"); | |
432 | ||
433 | h = strdup(fallback_hostname()); | |
434 | if (!h) | |
435 | return log_oom(); | |
436 | ||
ae2a15bc LP |
437 | *llmnr_hostname = TAKE_PTR(n); |
438 | *mdns_hostname = TAKE_PTR(m); | |
a25b0dc8 LP |
439 | |
440 | *full_hostname = h; | |
441 | ||
442 | return 0; | |
443 | } | |
444 | ||
eb60f9cd | 445 | static int on_hostname_change(sd_event_source *es, int fd, uint32_t revents, void *userdata) { |
e96de0ce | 446 | _cleanup_free_ char *full_hostname = NULL, *llmnr_hostname = NULL, *mdns_hostname = NULL; |
eb60f9cd | 447 | Manager *m = userdata; |
86c0411e | 448 | bool llmnr_hostname_changed; |
eb60f9cd LP |
449 | int r; |
450 | ||
451 | assert(m); | |
452 | ||
e96de0ce | 453 | r = determine_hostname(&full_hostname, &llmnr_hostname, &mdns_hostname); |
eb60f9cd LP |
454 | if (r < 0) |
455 | return 0; /* ignore invalid hostnames */ | |
456 | ||
86c0411e | 457 | llmnr_hostname_changed = !streq(llmnr_hostname, m->llmnr_hostname); |
e96de0ce | 458 | if (streq(full_hostname, m->full_hostname) && |
86c0411e | 459 | !llmnr_hostname_changed && |
e96de0ce | 460 | streq(mdns_hostname, m->mdns_hostname)) |
eb60f9cd LP |
461 | return 0; |
462 | ||
e96de0ce | 463 | log_info("System hostname changed to '%s'.", full_hostname); |
78c6a153 | 464 | |
e96de0ce LP |
465 | free_and_replace(m->full_hostname, full_hostname); |
466 | free_and_replace(m->llmnr_hostname, llmnr_hostname); | |
467 | free_and_replace(m->mdns_hostname, mdns_hostname); | |
eb60f9cd LP |
468 | |
469 | manager_refresh_rrs(m); | |
86c0411e | 470 | (void) manager_send_changed(m, "LLMNRHostname"); |
eb60f9cd LP |
471 | |
472 | return 0; | |
473 | } | |
474 | ||
475 | static int manager_watch_hostname(Manager *m) { | |
eb60f9cd LP |
476 | int r; |
477 | ||
478 | assert(m); | |
479 | ||
db4a47e9 LP |
480 | m->hostname_fd = open("/proc/sys/kernel/hostname", |
481 | O_RDONLY|O_CLOEXEC|O_NONBLOCK|O_NOCTTY); | |
eb60f9cd | 482 | if (m->hostname_fd < 0) { |
56f64d95 | 483 | log_warning_errno(errno, "Failed to watch hostname: %m"); |
eb60f9cd LP |
484 | return 0; |
485 | } | |
486 | ||
487 | r = sd_event_add_io(m->event, &m->hostname_event_source, m->hostname_fd, 0, on_hostname_change, m); | |
488 | if (r < 0) { | |
489 | if (r == -EPERM) | |
490 | /* kernels prior to 3.2 don't support polling this file. Ignore the failure. */ | |
491 | m->hostname_fd = safe_close(m->hostname_fd); | |
8d3d7072 MS |
492 | else |
493 | return log_error_errno(r, "Failed to add hostname event source: %m"); | |
eb60f9cd LP |
494 | } |
495 | ||
aa4a9deb LP |
496 | (void) sd_event_source_set_description(m->hostname_event_source, "hostname"); |
497 | ||
e96de0ce | 498 | r = determine_hostname(&m->full_hostname, &m->llmnr_hostname, &m->mdns_hostname); |
eb60f9cd | 499 | if (r < 0) { |
a25b0dc8 | 500 | log_info("Defaulting to hostname '%s'.", fallback_hostname()); |
78c6a153 | 501 | |
a25b0dc8 LP |
502 | r = make_fallback_hostnames(&m->full_hostname, &m->llmnr_hostname, &m->mdns_hostname); |
503 | if (r < 0) | |
504 | return r; | |
eb60f9cd | 505 | } else |
e96de0ce | 506 | log_info("Using system hostname '%s'.", m->full_hostname); |
eb60f9cd LP |
507 | |
508 | return 0; | |
509 | } | |
510 | ||
4d506d6b LP |
511 | static int manager_sigusr1(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) { |
512 | _cleanup_free_ char *buffer = NULL; | |
513 | _cleanup_fclose_ FILE *f = NULL; | |
514 | Manager *m = userdata; | |
cf84484a | 515 | DnsServer *server; |
4d506d6b LP |
516 | size_t size = 0; |
517 | DnsScope *scope; | |
cf84484a | 518 | Link *l; |
4d506d6b LP |
519 | |
520 | assert(s); | |
521 | assert(si); | |
522 | assert(m); | |
523 | ||
2fe21124 | 524 | f = open_memstream_unlocked(&buffer, &size); |
4d506d6b LP |
525 | if (!f) |
526 | return log_oom(); | |
527 | ||
528 | LIST_FOREACH(scopes, scope, m->dns_scopes) | |
529 | dns_scope_dump(scope, f); | |
530 | ||
cf84484a LP |
531 | LIST_FOREACH(servers, server, m->dns_servers) |
532 | dns_server_dump(server, f); | |
533 | LIST_FOREACH(servers, server, m->fallback_dns_servers) | |
534 | dns_server_dump(server, f); | |
90e74a66 | 535 | HASHMAP_FOREACH(l, m->links) |
cf84484a LP |
536 | LIST_FOREACH(servers, server, l->dns_servers) |
537 | dns_server_dump(server, f); | |
538 | ||
4d506d6b LP |
539 | if (fflush_and_check(f) < 0) |
540 | return log_oom(); | |
541 | ||
542 | log_dump(LOG_INFO, buffer); | |
543 | return 0; | |
544 | } | |
545 | ||
bc81447e LP |
546 | static int manager_sigusr2(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) { |
547 | Manager *m = userdata; | |
bc81447e LP |
548 | |
549 | assert(s); | |
550 | assert(si); | |
551 | assert(m); | |
552 | ||
ba35662f | 553 | manager_flush_caches(m); |
ba35662f | 554 | |
bc81447e LP |
555 | return 0; |
556 | } | |
557 | ||
d55b0463 LP |
558 | static int manager_sigrtmin1(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) { |
559 | Manager *m = userdata; | |
560 | ||
561 | assert(s); | |
562 | assert(si); | |
563 | assert(m); | |
564 | ||
565 | manager_reset_server_features(m); | |
566 | return 0; | |
567 | } | |
568 | ||
091a364c | 569 | int manager_new(Manager **ret) { |
74b2466e | 570 | _cleanup_(manager_freep) Manager *m = NULL; |
091a364c TG |
571 | int r; |
572 | ||
c92e531c LP |
573 | assert(ret); |
574 | ||
f55f2dce | 575 | m = new(Manager, 1); |
091a364c TG |
576 | if (!m) |
577 | return -ENOMEM; | |
578 | ||
f55f2dce YW |
579 | *m = (Manager) { |
580 | .llmnr_ipv4_udp_fd = -1, | |
581 | .llmnr_ipv6_udp_fd = -1, | |
582 | .llmnr_ipv4_tcp_fd = -1, | |
583 | .llmnr_ipv6_tcp_fd = -1, | |
584 | .mdns_ipv4_fd = -1, | |
585 | .mdns_ipv6_fd = -1, | |
f55f2dce YW |
586 | .hostname_fd = -1, |
587 | ||
3614df05 ZJS |
588 | .llmnr_support = DEFAULT_LLMNR_MODE, |
589 | .mdns_support = DEFAULT_MDNS_MODE, | |
f55f2dce YW |
590 | .dnssec_mode = DEFAULT_DNSSEC_MODE, |
591 | .dns_over_tls_mode = DEFAULT_DNS_OVER_TLS_MODE, | |
37d7a7d9 | 592 | .enable_cache = DNS_CACHE_MODE_YES, |
4b987478 | 593 | .dns_stub_listener_mode = DNS_STUB_LISTENER_YES, |
f55f2dce YW |
594 | .read_resolv_conf = true, |
595 | .need_builtin_fallbacks = true, | |
596 | .etc_hosts_last = USEC_INFINITY, | |
597 | .etc_hosts_mtime = USEC_INFINITY, | |
aa5408e2 GS |
598 | .etc_hosts_ino = 0, |
599 | .etc_hosts_dev = 0, | |
f55f2dce YW |
600 | .read_etc_hosts = true, |
601 | }; | |
091a364c | 602 | |
0d2cd476 LP |
603 | r = dns_trust_anchor_load(&m->trust_anchor); |
604 | if (r < 0) | |
605 | return r; | |
606 | ||
ad6c0475 LP |
607 | r = manager_parse_config_file(m); |
608 | if (r < 0) | |
5ce497b5 | 609 | log_warning_errno(r, "Failed to parse configuration file: %m"); |
ad6c0475 | 610 | |
e22c5b20 | 611 | #if ENABLE_DNS_OVER_TLS |
71a681ae IT |
612 | r = dnstls_manager_init(m); |
613 | if (r < 0) | |
614 | return r; | |
e22c5b20 IT |
615 | #endif |
616 | ||
091a364c TG |
617 | r = sd_event_default(&m->event); |
618 | if (r < 0) | |
619 | return r; | |
620 | ||
1ae17292 YW |
621 | (void) sd_event_add_signal(m->event, NULL, SIGTERM, NULL, NULL); |
622 | (void) sd_event_add_signal(m->event, NULL, SIGINT, NULL, NULL); | |
091a364c | 623 | |
1ae17292 | 624 | (void) sd_event_set_watchdog(m->event, true); |
091a364c | 625 | |
eb60f9cd LP |
626 | r = manager_watch_hostname(m); |
627 | if (r < 0) | |
628 | return r; | |
629 | ||
6501dd31 DR |
630 | r = dnssd_load(m); |
631 | if (r < 0) | |
632 | log_warning_errno(r, "Failed to load DNS-SD configuration files: %m"); | |
633 | ||
1716f6dc | 634 | r = dns_scope_new(m, &m->unicast_scope, NULL, DNS_PROTOCOL_DNS, AF_UNSPEC); |
74b2466e LP |
635 | if (r < 0) |
636 | return r; | |
637 | ||
638 | r = manager_network_monitor_listen(m); | |
639 | if (r < 0) | |
640 | return r; | |
641 | ||
642 | r = manager_rtnl_listen(m); | |
643 | if (r < 0) | |
644 | return r; | |
645 | ||
646 | r = manager_connect_bus(m); | |
647 | if (r < 0) | |
648 | return r; | |
649 | ||
4d506d6b | 650 | (void) sd_event_add_signal(m->event, &m->sigusr1_event_source, SIGUSR1, manager_sigusr1, m); |
bc81447e | 651 | (void) sd_event_add_signal(m->event, &m->sigusr2_event_source, SIGUSR2, manager_sigusr2, m); |
d55b0463 | 652 | (void) sd_event_add_signal(m->event, &m->sigrtmin1_event_source, SIGRTMIN+1, manager_sigrtmin1, m); |
4d506d6b | 653 | |
943ef07c LP |
654 | manager_cleanup_saved_user(m); |
655 | ||
1cc6c93a | 656 | *ret = TAKE_PTR(m); |
091a364c TG |
657 | |
658 | return 0; | |
659 | } | |
660 | ||
edc501d4 LP |
661 | int manager_start(Manager *m) { |
662 | int r; | |
663 | ||
664 | assert(m); | |
665 | ||
b30bf55d LP |
666 | r = manager_dns_stub_start(m); |
667 | if (r < 0) | |
668 | return r; | |
669 | ||
9581bb84 LP |
670 | r = manager_varlink_init(m); |
671 | if (r < 0) | |
672 | return r; | |
673 | ||
edc501d4 LP |
674 | return 0; |
675 | } | |
676 | ||
74b2466e LP |
677 | Manager *manager_free(Manager *m) { |
678 | Link *l; | |
6501dd31 | 679 | DnssdService *s; |
091a364c TG |
680 | |
681 | if (!m) | |
74b2466e LP |
682 | return NULL; |
683 | ||
4b95f179 LP |
684 | dns_server_unlink_all(m->dns_servers); |
685 | dns_server_unlink_all(m->fallback_dns_servers); | |
a51c1048 LP |
686 | dns_search_domain_unlink_all(m->search_domains); |
687 | ||
74b2466e LP |
688 | while ((l = hashmap_first(m->links))) |
689 | link_free(l); | |
f0e15467 LP |
690 | |
691 | while (m->dns_queries) | |
692 | dns_query_free(m->dns_queries); | |
74b2466e | 693 | |
cab5b059 LP |
694 | dns_scope_free(m->unicast_scope); |
695 | ||
b30bf55d LP |
696 | /* At this point only orphaned streams should remain. All others should have been freed already by their |
697 | * owners */ | |
698 | while (m->dns_streams) | |
699 | dns_stream_unref(m->dns_streams); | |
700 | ||
e22c5b20 IT |
701 | #if ENABLE_DNS_OVER_TLS |
702 | dnstls_manager_free(m); | |
703 | #endif | |
704 | ||
f0e15467 LP |
705 | hashmap_free(m->links); |
706 | hashmap_free(m->dns_transactions); | |
707 | ||
096b6773 LP |
708 | sd_event_source_unref(m->network_event_source); |
709 | sd_network_monitor_unref(m->network_monitor); | |
091a364c | 710 | |
a564ca2f LP |
711 | sd_netlink_unref(m->rtnl); |
712 | sd_event_source_unref(m->rtnl_event_source); | |
713 | ||
edc501d4 | 714 | manager_llmnr_stop(m); |
bc7702b0 | 715 | manager_mdns_stop(m); |
b30bf55d | 716 | manager_dns_stub_stop(m); |
9581bb84 | 717 | manager_varlink_done(m); |
623a4c97 | 718 | |
46505826 | 719 | ordered_set_free(m->dns_extra_stub_listeners); |
1f05101f | 720 | |
2400ae29 YW |
721 | bus_verify_polkit_async_registry_free(m->polkit_registry); |
722 | ||
92e31da1 | 723 | sd_bus_flush_close_unref(m->bus); |
091a364c | 724 | |
4d506d6b | 725 | sd_event_source_unref(m->sigusr1_event_source); |
bc81447e | 726 | sd_event_source_unref(m->sigusr2_event_source); |
d55b0463 | 727 | sd_event_source_unref(m->sigrtmin1_event_source); |
4d506d6b | 728 | |
74b2466e | 729 | sd_event_unref(m->event); |
623a4c97 | 730 | |
78c6a153 LP |
731 | dns_resource_key_unref(m->llmnr_host_ipv4_key); |
732 | dns_resource_key_unref(m->llmnr_host_ipv6_key); | |
400cb36e DR |
733 | dns_resource_key_unref(m->mdns_host_ipv4_key); |
734 | dns_resource_key_unref(m->mdns_host_ipv6_key); | |
eb60f9cd | 735 | |
eb60f9cd | 736 | sd_event_source_unref(m->hostname_event_source); |
d9fcf2ba | 737 | safe_close(m->hostname_fd); |
e96de0ce LP |
738 | |
739 | free(m->full_hostname); | |
78c6a153 LP |
740 | free(m->llmnr_hostname); |
741 | free(m->mdns_hostname); | |
eb60f9cd | 742 | |
6501dd31 DR |
743 | while ((s = hashmap_first(m->dnssd_services))) |
744 | dnssd_service_free(s); | |
745 | hashmap_free(m->dnssd_services); | |
746 | ||
0d2cd476 | 747 | dns_trust_anchor_flush(&m->trust_anchor); |
dd0bc0f1 | 748 | manager_etc_hosts_flush(m); |
0d2cd476 | 749 | |
6b430fdb | 750 | return mfree(m); |
091a364c TG |
751 | } |
752 | ||
1716f6dc | 753 | int manager_recv(Manager *m, int fd, DnsProtocol protocol, DnsPacket **ret) { |
74b2466e | 754 | _cleanup_(dns_packet_unrefp) DnsPacket *p = NULL; |
fb29cdbe LP |
755 | CMSG_BUFFER_TYPE(CMSG_SPACE(MAXSIZE(struct in_pktinfo, struct in6_pktinfo)) |
756 | + CMSG_SPACE(int) /* ttl/hoplimit */ | |
757 | + EXTRA_CMSG_SPACE /* kernel appears to require extra buffer space */) control; | |
1716f6dc | 758 | union sockaddr_union sa; |
74b2466e | 759 | struct iovec iov; |
f55f2dce YW |
760 | struct msghdr mh = { |
761 | .msg_name = &sa.sa, | |
762 | .msg_namelen = sizeof(sa), | |
763 | .msg_iov = &iov, | |
764 | .msg_iovlen = 1, | |
765 | .msg_control = &control, | |
766 | .msg_controllen = sizeof(control), | |
767 | }; | |
768 | struct cmsghdr *cmsg; | |
4edc2c9b LP |
769 | ssize_t ms, l; |
770 | int r; | |
74b2466e LP |
771 | |
772 | assert(m); | |
1716f6dc | 773 | assert(fd >= 0); |
74b2466e LP |
774 | assert(ret); |
775 | ||
4edc2c9b | 776 | ms = next_datagram_size_fd(fd); |
74b2466e | 777 | if (ms < 0) |
4edc2c9b | 778 | return ms; |
74b2466e | 779 | |
51027656 | 780 | r = dns_packet_new(&p, protocol, ms, DNS_PACKET_SIZE_MAX); |
74b2466e LP |
781 | if (r < 0) |
782 | return r; | |
783 | ||
cb310866 | 784 | iov = IOVEC_MAKE(DNS_PACKET_DATA(p), p->allocated); |
74b2466e | 785 | |
3691bcf3 LP |
786 | l = recvmsg_safe(fd, &mh, 0); |
787 | if (IN_SET(l, -EAGAIN, -EINTR)) | |
788 | return 0; | |
d7a0f1f4 | 789 | if (l <= 0) |
3691bcf3 | 790 | return l; |
091a364c | 791 | |
1716f6dc LP |
792 | assert(!(mh.msg_flags & MSG_TRUNC)); |
793 | ||
74b2466e | 794 | p->size = (size_t) l; |
091a364c | 795 | |
1716f6dc | 796 | p->family = sa.sa.sa_family; |
623a4c97 LP |
797 | p->ipproto = IPPROTO_UDP; |
798 | if (p->family == AF_INET) { | |
1716f6dc | 799 | p->sender.in = sa.in.sin_addr; |
623a4c97 LP |
800 | p->sender_port = be16toh(sa.in.sin_port); |
801 | } else if (p->family == AF_INET6) { | |
1716f6dc | 802 | p->sender.in6 = sa.in6.sin6_addr; |
623a4c97 LP |
803 | p->sender_port = be16toh(sa.in6.sin6_port); |
804 | p->ifindex = sa.in6.sin6_scope_id; | |
805 | } else | |
1716f6dc | 806 | return -EAFNOSUPPORT; |
74b2466e | 807 | |
2a1288ff | 808 | CMSG_FOREACH(cmsg, &mh) { |
74b2466e | 809 | |
1716f6dc LP |
810 | if (cmsg->cmsg_level == IPPROTO_IPV6) { |
811 | assert(p->family == AF_INET6); | |
74b2466e | 812 | |
1716f6dc | 813 | switch (cmsg->cmsg_type) { |
74b2466e | 814 | |
1716f6dc LP |
815 | case IPV6_PKTINFO: { |
816 | struct in6_pktinfo *i = (struct in6_pktinfo*) CMSG_DATA(cmsg); | |
74b2466e | 817 | |
623a4c97 LP |
818 | if (p->ifindex <= 0) |
819 | p->ifindex = i->ipi6_ifindex; | |
820 | ||
1716f6dc LP |
821 | p->destination.in6 = i->ipi6_addr; |
822 | break; | |
823 | } | |
74b2466e | 824 | |
1716f6dc LP |
825 | case IPV6_HOPLIMIT: |
826 | p->ttl = *(int *) CMSG_DATA(cmsg); | |
827 | break; | |
74b2466e | 828 | |
1716f6dc LP |
829 | } |
830 | } else if (cmsg->cmsg_level == IPPROTO_IP) { | |
831 | assert(p->family == AF_INET); | |
74b2466e | 832 | |
1716f6dc | 833 | switch (cmsg->cmsg_type) { |
74b2466e | 834 | |
1716f6dc LP |
835 | case IP_PKTINFO: { |
836 | struct in_pktinfo *i = (struct in_pktinfo*) CMSG_DATA(cmsg); | |
091a364c | 837 | |
623a4c97 LP |
838 | if (p->ifindex <= 0) |
839 | p->ifindex = i->ipi_ifindex; | |
840 | ||
1716f6dc LP |
841 | p->destination.in = i->ipi_addr; |
842 | break; | |
843 | } | |
74b2466e | 844 | |
623a4c97 | 845 | case IP_TTL: |
1716f6dc LP |
846 | p->ttl = *(int *) CMSG_DATA(cmsg); |
847 | break; | |
848 | } | |
849 | } | |
850 | } | |
74b2466e | 851 | |
623a4c97 LP |
852 | /* The Linux kernel sets the interface index to the loopback |
853 | * device if the packet came from the local host since it | |
854 | * avoids the routing table in such a case. Let's unset the | |
855 | * interface index in such a case. */ | |
a5f03596 | 856 | if (p->ifindex == LOOPBACK_IFINDEX) |
623a4c97 LP |
857 | p->ifindex = 0; |
858 | ||
86ad4cd7 TG |
859 | if (protocol != DNS_PROTOCOL_DNS) { |
860 | /* If we don't know the interface index still, we look for the | |
861 | * first local interface with a matching address. Yuck! */ | |
862 | if (p->ifindex <= 0) | |
863 | p->ifindex = manager_find_ifindex(m, p->family, &p->destination); | |
864 | } | |
623a4c97 | 865 | |
1cc6c93a | 866 | *ret = TAKE_PTR(p); |
74b2466e LP |
867 | |
868 | return 1; | |
869 | } | |
870 | ||
74b2466e LP |
871 | static int sendmsg_loop(int fd, struct msghdr *mh, int flags) { |
872 | int r; | |
873 | ||
874 | assert(fd >= 0); | |
875 | assert(mh); | |
876 | ||
877 | for (;;) { | |
878 | if (sendmsg(fd, mh, flags) >= 0) | |
879 | return 0; | |
880 | ||
881 | if (errno == EINTR) | |
882 | continue; | |
883 | ||
884 | if (errno != EAGAIN) | |
885 | return -errno; | |
886 | ||
887 | r = fd_wait_for_event(fd, POLLOUT, SEND_TIMEOUT_USEC); | |
888 | if (r < 0) | |
889 | return r; | |
890 | if (r == 0) | |
891 | return -ETIMEDOUT; | |
892 | } | |
893 | } | |
894 | ||
72290734 TG |
895 | static int write_loop(int fd, void *message, size_t length) { |
896 | int r; | |
897 | ||
898 | assert(fd >= 0); | |
899 | assert(message); | |
900 | ||
901 | for (;;) { | |
902 | if (write(fd, message, length) >= 0) | |
903 | return 0; | |
904 | ||
905 | if (errno == EINTR) | |
906 | continue; | |
907 | ||
908 | if (errno != EAGAIN) | |
909 | return -errno; | |
910 | ||
911 | r = fd_wait_for_event(fd, POLLOUT, SEND_TIMEOUT_USEC); | |
912 | if (r < 0) | |
913 | return r; | |
914 | if (r == 0) | |
915 | return -ETIMEDOUT; | |
916 | } | |
917 | } | |
918 | ||
919 | int manager_write(Manager *m, int fd, DnsPacket *p) { | |
920 | int r; | |
921 | ||
deb3f3d3 | 922 | log_debug("Sending %s packet with id %" PRIu16 ".", DNS_PACKET_QR(p) ? "response" : "query", DNS_PACKET_ID(p)); |
72290734 TG |
923 | |
924 | r = write_loop(fd, DNS_PACKET_DATA(p), p->size); | |
925 | if (r < 0) | |
926 | return r; | |
927 | ||
928 | return 0; | |
929 | } | |
930 | ||
b30bf55d LP |
931 | static int manager_ipv4_send( |
932 | Manager *m, | |
933 | int fd, | |
934 | int ifindex, | |
935 | const struct in_addr *destination, | |
936 | uint16_t port, | |
937 | const struct in_addr *source, | |
938 | DnsPacket *p) { | |
fb29cdbe LP |
939 | |
940 | CMSG_BUFFER_TYPE(CMSG_SPACE(sizeof(struct in_pktinfo))) control = {}; | |
f55f2dce | 941 | union sockaddr_union sa; |
74b2466e | 942 | struct iovec iov; |
f55f2dce YW |
943 | struct msghdr mh = { |
944 | .msg_iov = &iov, | |
945 | .msg_iovlen = 1, | |
946 | .msg_name = &sa.sa, | |
947 | .msg_namelen = sizeof(sa.in), | |
948 | }; | |
74b2466e LP |
949 | |
950 | assert(m); | |
1716f6dc | 951 | assert(fd >= 0); |
b30bf55d | 952 | assert(destination); |
1716f6dc | 953 | assert(port > 0); |
74b2466e LP |
954 | assert(p); |
955 | ||
cb310866 | 956 | iov = IOVEC_MAKE(DNS_PACKET_DATA(p), p->size); |
091a364c | 957 | |
f55f2dce YW |
958 | sa = (union sockaddr_union) { |
959 | .in.sin_family = AF_INET, | |
960 | .in.sin_addr = *destination, | |
961 | .in.sin_port = htobe16(port), | |
962 | }; | |
091a364c | 963 | |
74b2466e LP |
964 | if (ifindex > 0) { |
965 | struct cmsghdr *cmsg; | |
966 | struct in_pktinfo *pi; | |
967 | ||
1716f6dc | 968 | mh.msg_control = &control; |
a258f491 | 969 | mh.msg_controllen = sizeof(control); |
74b2466e LP |
970 | |
971 | cmsg = CMSG_FIRSTHDR(&mh); | |
a258f491 | 972 | cmsg->cmsg_len = CMSG_LEN(sizeof(struct in_pktinfo)); |
74b2466e LP |
973 | cmsg->cmsg_level = IPPROTO_IP; |
974 | cmsg->cmsg_type = IP_PKTINFO; | |
975 | ||
976 | pi = (struct in_pktinfo*) CMSG_DATA(cmsg); | |
977 | pi->ipi_ifindex = ifindex; | |
b30bf55d LP |
978 | |
979 | if (source) | |
980 | pi->ipi_spec_dst = *source; | |
74b2466e LP |
981 | } |
982 | ||
983 | return sendmsg_loop(fd, &mh, 0); | |
984 | } | |
985 | ||
b30bf55d LP |
986 | static int manager_ipv6_send( |
987 | Manager *m, | |
988 | int fd, | |
989 | int ifindex, | |
990 | const struct in6_addr *destination, | |
991 | uint16_t port, | |
992 | const struct in6_addr *source, | |
993 | DnsPacket *p) { | |
994 | ||
fb29cdbe | 995 | CMSG_BUFFER_TYPE(CMSG_SPACE(sizeof(struct in6_pktinfo))) control = {}; |
f55f2dce | 996 | union sockaddr_union sa; |
74b2466e | 997 | struct iovec iov; |
f55f2dce YW |
998 | struct msghdr mh = { |
999 | .msg_iov = &iov, | |
1000 | .msg_iovlen = 1, | |
1001 | .msg_name = &sa.sa, | |
1002 | .msg_namelen = sizeof(sa.in6), | |
1003 | }; | |
74b2466e LP |
1004 | |
1005 | assert(m); | |
1716f6dc | 1006 | assert(fd >= 0); |
b30bf55d | 1007 | assert(destination); |
1716f6dc | 1008 | assert(port > 0); |
74b2466e LP |
1009 | assert(p); |
1010 | ||
cb310866 | 1011 | iov = IOVEC_MAKE(DNS_PACKET_DATA(p), p->size); |
74b2466e | 1012 | |
f55f2dce YW |
1013 | sa = (union sockaddr_union) { |
1014 | .in6.sin6_family = AF_INET6, | |
1015 | .in6.sin6_addr = *destination, | |
1016 | .in6.sin6_port = htobe16(port), | |
1017 | .in6.sin6_scope_id = ifindex, | |
1018 | }; | |
74b2466e LP |
1019 | |
1020 | if (ifindex > 0) { | |
1021 | struct cmsghdr *cmsg; | |
1022 | struct in6_pktinfo *pi; | |
1023 | ||
1716f6dc | 1024 | mh.msg_control = &control; |
a258f491 | 1025 | mh.msg_controllen = sizeof(control); |
74b2466e LP |
1026 | |
1027 | cmsg = CMSG_FIRSTHDR(&mh); | |
a258f491 | 1028 | cmsg->cmsg_len = CMSG_LEN(sizeof(struct in6_pktinfo)); |
74b2466e LP |
1029 | cmsg->cmsg_level = IPPROTO_IPV6; |
1030 | cmsg->cmsg_type = IPV6_PKTINFO; | |
1031 | ||
1032 | pi = (struct in6_pktinfo*) CMSG_DATA(cmsg); | |
1033 | pi->ipi6_ifindex = ifindex; | |
b30bf55d LP |
1034 | |
1035 | if (source) | |
1036 | pi->ipi6_addr = *source; | |
74b2466e LP |
1037 | } |
1038 | ||
1039 | return sendmsg_loop(fd, &mh, 0); | |
1040 | } | |
1041 | ||
b30bf55d LP |
1042 | int manager_send( |
1043 | Manager *m, | |
1044 | int fd, | |
1045 | int ifindex, | |
1046 | int family, | |
1047 | const union in_addr_union *destination, | |
1048 | uint16_t port, | |
1049 | const union in_addr_union *source, | |
1050 | DnsPacket *p) { | |
1051 | ||
1716f6dc LP |
1052 | assert(m); |
1053 | assert(fd >= 0); | |
b30bf55d | 1054 | assert(destination); |
1716f6dc LP |
1055 | assert(port > 0); |
1056 | assert(p); | |
1057 | ||
deb3f3d3 | 1058 | 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 | 1059 | |
1716f6dc | 1060 | if (family == AF_INET) |
25270cf3 | 1061 | return manager_ipv4_send(m, fd, ifindex, &destination->in, port, source ? &source->in : NULL, p); |
2817157b | 1062 | if (family == AF_INET6) |
25270cf3 | 1063 | return manager_ipv6_send(m, fd, ifindex, &destination->in6, port, source ? &source->in6 : NULL, p); |
1716f6dc LP |
1064 | |
1065 | return -EAFNOSUPPORT; | |
1066 | } | |
1067 | ||
e1c95994 LP |
1068 | uint32_t manager_find_mtu(Manager *m) { |
1069 | uint32_t mtu = 0; | |
1070 | Link *l; | |
e1c95994 LP |
1071 | |
1072 | /* If we don't know on which link a DNS packet would be | |
1073 | * delivered, let's find the largest MTU that works on all | |
1074 | * interfaces we know of */ | |
1075 | ||
90e74a66 | 1076 | HASHMAP_FOREACH(l, m->links) { |
e1c95994 LP |
1077 | if (l->mtu <= 0) |
1078 | continue; | |
1079 | ||
1080 | if (mtu <= 0 || l->mtu < mtu) | |
1081 | mtu = l->mtu; | |
1082 | } | |
1083 | ||
1084 | return mtu; | |
1085 | } | |
1716f6dc | 1086 | |
623a4c97 | 1087 | int manager_find_ifindex(Manager *m, int family, const union in_addr_union *in_addr) { |
ec2c5e43 LP |
1088 | LinkAddress *a; |
1089 | ||
1090 | assert(m); | |
1091 | ||
4e945a6f | 1092 | a = manager_find_link_address(m, family, in_addr); |
ec2c5e43 LP |
1093 | if (a) |
1094 | return a->link->ifindex; | |
1095 | ||
1096 | return 0; | |
1097 | } | |
1098 | ||
eb60f9cd | 1099 | void manager_refresh_rrs(Manager *m) { |
eb60f9cd | 1100 | Link *l; |
6db6a464 | 1101 | DnssdService *s; |
eb60f9cd LP |
1102 | |
1103 | assert(m); | |
1104 | ||
78c6a153 LP |
1105 | m->llmnr_host_ipv4_key = dns_resource_key_unref(m->llmnr_host_ipv4_key); |
1106 | m->llmnr_host_ipv6_key = dns_resource_key_unref(m->llmnr_host_ipv6_key); | |
400cb36e DR |
1107 | m->mdns_host_ipv4_key = dns_resource_key_unref(m->mdns_host_ipv4_key); |
1108 | m->mdns_host_ipv6_key = dns_resource_key_unref(m->mdns_host_ipv6_key); | |
eb60f9cd | 1109 | |
6db6a464 | 1110 | if (m->mdns_support == RESOLVE_SUPPORT_YES) |
90e74a66 | 1111 | HASHMAP_FOREACH(s, m->dnssd_services) |
6db6a464 DR |
1112 | if (dnssd_update_rrs(s) < 0) |
1113 | log_warning("Failed to refresh DNS-SD service '%s'", s->name); | |
1114 | ||
90e74a66 | 1115 | HASHMAP_FOREACH(l, m->links) { |
eb60f9cd LP |
1116 | link_add_rrs(l, true); |
1117 | link_add_rrs(l, false); | |
1118 | } | |
1119 | } | |
1120 | ||
e7c1b0e4 | 1121 | static int manager_next_random_name(const char *old, char **ret_new) { |
ec2c5e43 | 1122 | const char *p; |
556a2294 | 1123 | uint64_t u, a; |
e7c1b0e4 | 1124 | char *n; |
623a4c97 | 1125 | |
e7c1b0e4 | 1126 | p = strchr(old, 0); |
ec2c5e43 LP |
1127 | assert(p); |
1128 | ||
e7c1b0e4 DR |
1129 | while (p > old) { |
1130 | if (!strchr(DIGITS, p[-1])) | |
ec2c5e43 LP |
1131 | break; |
1132 | ||
1133 | p--; | |
1134 | } | |
1135 | ||
1136 | if (*p == 0 || safe_atou64(p, &u) < 0 || u <= 0) | |
1137 | u = 1; | |
1138 | ||
556a2294 LP |
1139 | /* Add a random number to the old value. This way we can avoid |
1140 | * that two hosts pick the same hostname, win on IPv4 and lose | |
1141 | * on IPv6 (or vice versa), and pick the same hostname | |
1142 | * replacement hostname, ad infinitum. We still want the | |
1143 | * numbers to go up monotonically, hence we just add a random | |
1144 | * value 1..10 */ | |
1145 | ||
1146 | random_bytes(&a, sizeof(a)); | |
1147 | u += 1 + a % 10; | |
ec2c5e43 | 1148 | |
e7c1b0e4 | 1149 | if (asprintf(&n, "%.*s%" PRIu64, (int) (p - old), old, u) < 0) |
ec2c5e43 LP |
1150 | return -ENOMEM; |
1151 | ||
e7c1b0e4 DR |
1152 | *ret_new = n; |
1153 | ||
1154 | return 0; | |
1155 | } | |
1156 | ||
1157 | int manager_next_hostname(Manager *m) { | |
1158 | _cleanup_free_ char *h = NULL, *k = NULL; | |
1159 | int r; | |
1160 | ||
1161 | assert(m); | |
1162 | ||
1163 | r = manager_next_random_name(m->llmnr_hostname, &h); | |
1164 | if (r < 0) | |
1165 | return r; | |
1166 | ||
7470cc4c | 1167 | r = dns_name_concat(h, "local", 0, &k); |
e7c1b0e4 | 1168 | if (r < 0) |
78c6a153 | 1169 | return r; |
78c6a153 LP |
1170 | |
1171 | log_info("Hostname conflict, changing published hostname from '%s' to '%s'.", m->llmnr_hostname, h); | |
1172 | ||
e7c1b0e4 DR |
1173 | free_and_replace(m->llmnr_hostname, h); |
1174 | free_and_replace(m->mdns_hostname, k); | |
ec2c5e43 | 1175 | |
eb60f9cd | 1176 | manager_refresh_rrs(m); |
86c0411e | 1177 | (void) manager_send_changed(m, "LLMNRHostname"); |
623a4c97 LP |
1178 | |
1179 | return 0; | |
1180 | } | |
ec2c5e43 | 1181 | |
4e945a6f | 1182 | LinkAddress* manager_find_link_address(Manager *m, int family, const union in_addr_union *in_addr) { |
ec2c5e43 LP |
1183 | Link *l; |
1184 | ||
1185 | assert(m); | |
1186 | ||
90e74a66 | 1187 | HASHMAP_FOREACH(l, m->links) { |
ec2c5e43 LP |
1188 | LinkAddress *a; |
1189 | ||
1190 | a = link_find_address(l, family, in_addr); | |
1191 | if (a) | |
1192 | return a; | |
1193 | } | |
1194 | ||
1195 | return NULL; | |
1196 | } | |
1197 | ||
a4076574 | 1198 | bool manager_our_packet(Manager *m, DnsPacket *p) { |
ec2c5e43 LP |
1199 | assert(m); |
1200 | assert(p); | |
1201 | ||
4e945a6f | 1202 | return !!manager_find_link_address(m, p->family, &p->sender); |
ec2c5e43 | 1203 | } |
4e945a6f | 1204 | |
a4076574 LP |
1205 | DnsScope* manager_find_scope(Manager *m, DnsPacket *p) { |
1206 | Link *l; | |
1207 | ||
1208 | assert(m); | |
1209 | assert(p); | |
1210 | ||
1211 | l = hashmap_get(m->links, INT_TO_PTR(p->ifindex)); | |
1212 | if (!l) | |
1213 | return NULL; | |
1214 | ||
b4f1862d DM |
1215 | switch (p->protocol) { |
1216 | case DNS_PROTOCOL_LLMNR: | |
a4076574 LP |
1217 | if (p->family == AF_INET) |
1218 | return l->llmnr_ipv4_scope; | |
1219 | else if (p->family == AF_INET6) | |
1220 | return l->llmnr_ipv6_scope; | |
b4f1862d DM |
1221 | |
1222 | break; | |
1223 | ||
1224 | case DNS_PROTOCOL_MDNS: | |
1225 | if (p->family == AF_INET) | |
1226 | return l->mdns_ipv4_scope; | |
1227 | else if (p->family == AF_INET6) | |
1228 | return l->mdns_ipv6_scope; | |
1229 | ||
1230 | break; | |
1231 | ||
1232 | default: | |
1233 | break; | |
a4076574 LP |
1234 | } |
1235 | ||
1236 | return NULL; | |
1237 | } | |
1238 | ||
902bb5d8 LP |
1239 | void manager_verify_all(Manager *m) { |
1240 | DnsScope *s; | |
1241 | ||
1242 | assert(m); | |
1243 | ||
1244 | LIST_FOREACH(scopes, s, m->dns_scopes) | |
1245 | dns_zone_verify_all(&s->zone); | |
1246 | } | |
1247 | ||
78c6a153 | 1248 | int manager_is_own_hostname(Manager *m, const char *name) { |
78c6a153 LP |
1249 | int r; |
1250 | ||
1251 | assert(m); | |
1252 | assert(name); | |
1253 | ||
1254 | if (m->llmnr_hostname) { | |
1255 | r = dns_name_equal(name, m->llmnr_hostname); | |
1256 | if (r != 0) | |
1257 | return r; | |
1258 | } | |
1259 | ||
e96de0ce LP |
1260 | if (m->mdns_hostname) { |
1261 | r = dns_name_equal(name, m->mdns_hostname); | |
1262 | if (r != 0) | |
1263 | return r; | |
1264 | } | |
1265 | ||
1266 | if (m->full_hostname) | |
1267 | return dns_name_equal(name, m->full_hostname); | |
78c6a153 LP |
1268 | |
1269 | return 0; | |
1270 | } | |
1271 | ||
9176a57c LP |
1272 | int manager_compile_dns_servers(Manager *m, OrderedSet **dns) { |
1273 | DnsServer *s; | |
9176a57c LP |
1274 | Link *l; |
1275 | int r; | |
1276 | ||
1277 | assert(m); | |
1278 | assert(dns); | |
1279 | ||
1280 | r = ordered_set_ensure_allocated(dns, &dns_server_hash_ops); | |
1281 | if (r < 0) | |
1282 | return r; | |
1283 | ||
1284 | /* First add the system-wide servers and domains */ | |
1285 | LIST_FOREACH(servers, s, m->dns_servers) { | |
1286 | r = ordered_set_put(*dns, s); | |
1287 | if (r == -EEXIST) | |
1288 | continue; | |
1289 | if (r < 0) | |
1290 | return r; | |
1291 | } | |
1292 | ||
1293 | /* Then, add the per-link servers */ | |
90e74a66 | 1294 | HASHMAP_FOREACH(l, m->links) { |
9176a57c LP |
1295 | LIST_FOREACH(servers, s, l->dns_servers) { |
1296 | r = ordered_set_put(*dns, s); | |
1297 | if (r == -EEXIST) | |
1298 | continue; | |
1299 | if (r < 0) | |
1300 | return r; | |
1301 | } | |
1302 | } | |
1303 | ||
1304 | /* If we found nothing, add the fallback servers */ | |
1305 | if (ordered_set_isempty(*dns)) { | |
1306 | LIST_FOREACH(servers, s, m->fallback_dns_servers) { | |
1307 | r = ordered_set_put(*dns, s); | |
1308 | if (r == -EEXIST) | |
1309 | continue; | |
1310 | if (r < 0) | |
1311 | return r; | |
1312 | } | |
1313 | } | |
1314 | ||
1315 | return 0; | |
1316 | } | |
1317 | ||
94363cbb MP |
1318 | /* filter_route is a tri-state: |
1319 | * < 0: no filtering | |
1320 | * = 0 or false: return only domains which should be used for searching | |
1321 | * > 0 or true: return only domains which are for routing only | |
1322 | */ | |
6f7da49d | 1323 | int manager_compile_search_domains(Manager *m, OrderedSet **domains, int filter_route) { |
9176a57c | 1324 | DnsSearchDomain *d; |
9176a57c LP |
1325 | Link *l; |
1326 | int r; | |
1327 | ||
1328 | assert(m); | |
1329 | assert(domains); | |
1330 | ||
1331 | r = ordered_set_ensure_allocated(domains, &dns_name_hash_ops); | |
1332 | if (r < 0) | |
1333 | return r; | |
1334 | ||
1335 | LIST_FOREACH(domains, d, m->search_domains) { | |
6f7da49d LP |
1336 | |
1337 | if (filter_route >= 0 && | |
1338 | d->route_only != !!filter_route) | |
1339 | continue; | |
1340 | ||
9176a57c LP |
1341 | r = ordered_set_put(*domains, d->name); |
1342 | if (r == -EEXIST) | |
1343 | continue; | |
1344 | if (r < 0) | |
1345 | return r; | |
1346 | } | |
1347 | ||
90e74a66 | 1348 | HASHMAP_FOREACH(l, m->links) { |
9176a57c LP |
1349 | |
1350 | LIST_FOREACH(domains, d, l->search_domains) { | |
6f7da49d LP |
1351 | |
1352 | if (filter_route >= 0 && | |
1353 | d->route_only != !!filter_route) | |
1354 | continue; | |
1355 | ||
9176a57c LP |
1356 | r = ordered_set_put(*domains, d->name); |
1357 | if (r == -EEXIST) | |
1358 | continue; | |
1359 | if (r < 0) | |
1360 | return r; | |
1361 | } | |
1362 | } | |
1363 | ||
1364 | return 0; | |
1365 | } | |
c69fa7e3 LP |
1366 | |
1367 | DnssecMode manager_get_dnssec_mode(Manager *m) { | |
1368 | assert(m); | |
1369 | ||
1370 | if (m->dnssec_mode != _DNSSEC_MODE_INVALID) | |
1371 | return m->dnssec_mode; | |
1372 | ||
1373 | return DNSSEC_NO; | |
1374 | } | |
1375 | ||
1376 | bool manager_dnssec_supported(Manager *m) { | |
1377 | DnsServer *server; | |
c69fa7e3 LP |
1378 | Link *l; |
1379 | ||
1380 | assert(m); | |
1381 | ||
1382 | if (manager_get_dnssec_mode(m) == DNSSEC_NO) | |
1383 | return false; | |
1384 | ||
1385 | server = manager_get_dns_server(m); | |
1386 | if (server && !dns_server_dnssec_supported(server)) | |
1387 | return false; | |
1388 | ||
90e74a66 | 1389 | HASHMAP_FOREACH(l, m->links) |
c69fa7e3 LP |
1390 | if (!link_dnssec_supported(l)) |
1391 | return false; | |
1392 | ||
1393 | return true; | |
1394 | } | |
59c5b597 | 1395 | |
c9299be2 | 1396 | DnsOverTlsMode manager_get_dns_over_tls_mode(Manager *m) { |
5d67a7ae IT |
1397 | assert(m); |
1398 | ||
c9299be2 IT |
1399 | if (m->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID) |
1400 | return m->dns_over_tls_mode; | |
5d67a7ae | 1401 | |
c9299be2 | 1402 | return DNS_OVER_TLS_NO; |
5d67a7ae IT |
1403 | } |
1404 | ||
59c5b597 LP |
1405 | void manager_dnssec_verdict(Manager *m, DnssecVerdict verdict, const DnsResourceKey *key) { |
1406 | ||
1407 | assert(verdict >= 0); | |
1408 | assert(verdict < _DNSSEC_VERDICT_MAX); | |
1409 | ||
f1d34068 | 1410 | if (DEBUG_LOGGING) { |
202b76ae | 1411 | char s[DNS_RESOURCE_KEY_STRING_MAX]; |
59c5b597 | 1412 | |
202b76ae ZJS |
1413 | log_debug("Found verdict for lookup %s: %s", |
1414 | dns_resource_key_to_string(key, s, sizeof s), | |
1415 | dnssec_verdict_to_string(verdict)); | |
59c5b597 LP |
1416 | } |
1417 | ||
1418 | m->n_dnssec_verdict[verdict]++; | |
1419 | } | |
011696f7 LP |
1420 | |
1421 | bool manager_routable(Manager *m, int family) { | |
011696f7 LP |
1422 | Link *l; |
1423 | ||
1424 | assert(m); | |
1425 | ||
1426 | /* Returns true if the host has at least one interface with a routable address of the specified type */ | |
1427 | ||
90e74a66 | 1428 | HASHMAP_FOREACH(l, m->links) |
011696f7 LP |
1429 | if (link_relevant(l, family, false)) |
1430 | return true; | |
1431 | ||
1432 | return false; | |
1433 | } | |
ba35662f LP |
1434 | |
1435 | void manager_flush_caches(Manager *m) { | |
1436 | DnsScope *scope; | |
1437 | ||
1438 | assert(m); | |
1439 | ||
1440 | LIST_FOREACH(scopes, scope, m->dns_scopes) | |
1441 | dns_cache_flush(&scope->cache); | |
aac57b35 ZJS |
1442 | |
1443 | log_info("Flushed all caches."); | |
ba35662f | 1444 | } |
943ef07c | 1445 | |
59c0fd0e | 1446 | void manager_reset_server_features(Manager *m) { |
59c0fd0e LP |
1447 | Link *l; |
1448 | ||
1449 | dns_server_reset_features_all(m->dns_servers); | |
1450 | dns_server_reset_features_all(m->fallback_dns_servers); | |
1451 | ||
90e74a66 | 1452 | HASHMAP_FOREACH(l, m->links) |
59c0fd0e LP |
1453 | dns_server_reset_features_all(l->dns_servers); |
1454 | ||
1455 | log_info("Resetting learnt feature levels on all servers."); | |
1456 | } | |
1457 | ||
943ef07c LP |
1458 | void manager_cleanup_saved_user(Manager *m) { |
1459 | _cleanup_closedir_ DIR *d = NULL; | |
1460 | struct dirent *de; | |
943ef07c LP |
1461 | |
1462 | assert(m); | |
1463 | ||
1464 | /* Clean up all saved per-link files in /run/systemd/resolve/netif/ that don't have a matching interface | |
1465 | * anymore. These files are created to persist settings pushed in by the user via the bus, so that resolved can | |
1466 | * be restarted without losing this data. */ | |
1467 | ||
1468 | d = opendir("/run/systemd/resolve/netif/"); | |
1469 | if (!d) { | |
1470 | if (errno == ENOENT) | |
1471 | return; | |
1472 | ||
1473 | log_warning_errno(errno, "Failed to open interface directory: %m"); | |
1474 | return; | |
1475 | } | |
1476 | ||
1477 | FOREACH_DIRENT_ALL(de, d, log_error_errno(errno, "Failed to read interface directory: %m")) { | |
1478 | _cleanup_free_ char *p = NULL; | |
1479 | int ifindex; | |
1480 | Link *l; | |
1481 | ||
1482 | if (!IN_SET(de->d_type, DT_UNKNOWN, DT_REG)) | |
1483 | continue; | |
1484 | ||
49bfc877 | 1485 | if (dot_or_dot_dot(de->d_name)) |
943ef07c LP |
1486 | continue; |
1487 | ||
597da51b ZJS |
1488 | ifindex = parse_ifindex(de->d_name); |
1489 | if (ifindex < 0) /* Probably some temporary file from a previous run. Delete it */ | |
943ef07c LP |
1490 | goto rm; |
1491 | ||
1492 | l = hashmap_get(m->links, INT_TO_PTR(ifindex)); | |
1493 | if (!l) /* link vanished */ | |
1494 | goto rm; | |
1495 | ||
1496 | if (l->is_managed) /* now managed by networkd, hence the bus settings are useless */ | |
1497 | goto rm; | |
1498 | ||
1499 | continue; | |
1500 | ||
1501 | rm: | |
b910cc72 | 1502 | p = path_join("/run/systemd/resolve/netif", de->d_name); |
943ef07c LP |
1503 | if (!p) { |
1504 | log_oom(); | |
1505 | return; | |
1506 | } | |
1507 | ||
1508 | (void) unlink(p); | |
1509 | } | |
1510 | } | |
e7c1b0e4 DR |
1511 | |
1512 | bool manager_next_dnssd_names(Manager *m) { | |
e7c1b0e4 DR |
1513 | DnssdService *s; |
1514 | bool tried = false; | |
1515 | int r; | |
1516 | ||
1517 | assert(m); | |
1518 | ||
90e74a66 | 1519 | HASHMAP_FOREACH(s, m->dnssd_services) { |
e7c1b0e4 DR |
1520 | _cleanup_free_ char * new_name = NULL; |
1521 | ||
1522 | if (!s->withdrawn) | |
1523 | continue; | |
1524 | ||
1525 | r = manager_next_random_name(s->name_template, &new_name); | |
1526 | if (r < 0) { | |
1527 | log_warning_errno(r, "Failed to get new name for service '%s': %m", s->name); | |
1528 | continue; | |
1529 | } | |
1530 | ||
1531 | free_and_replace(s->name_template, new_name); | |
1532 | ||
1533 | s->withdrawn = false; | |
1534 | ||
1535 | tried = true; | |
1536 | } | |
1537 | ||
1538 | if (tried) | |
1539 | manager_refresh_rrs(m); | |
1540 | ||
1541 | return tried; | |
1542 | } |