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[thirdparty/systemd.git] / src / network / networkd-manager.c
1 /* SPDX-License-Identifier: LGPL-2.1+ */
2
3 #include <sys/socket.h>
4 #include <linux/if.h>
5 #include <linux/fib_rules.h>
6 #include <stdio_ext.h>
7
8 #include "sd-daemon.h"
9 #include "sd-netlink.h"
10
11 #include "alloc-util.h"
12 #include "bus-util.h"
13 #include "conf-parser.h"
14 #include "def.h"
15 #include "device-util.h"
16 #include "dns-domain.h"
17 #include "fd-util.h"
18 #include "fileio.h"
19 #include "local-addresses.h"
20 #include "netlink-util.h"
21 #include "networkd-manager.h"
22 #include "ordered-set.h"
23 #include "path-util.h"
24 #include "set.h"
25 #include "strv.h"
26 #include "virt.h"
27
28 /* use 8 MB for receive socket kernel queue. */
29 #define RCVBUF_SIZE (8*1024*1024)
30
31 const char* const network_dirs[] = {
32 "/etc/systemd/network",
33 "/run/systemd/network",
34 "/usr/lib/systemd/network",
35 #if HAVE_SPLIT_USR
36 "/lib/systemd/network",
37 #endif
38 NULL};
39
40 static int setup_default_address_pool(Manager *m) {
41 AddressPool *p;
42 int r;
43
44 assert(m);
45
46 /* Add in the well-known private address ranges. */
47
48 r = address_pool_new_from_string(m, &p, AF_INET6, "fc00::", 7);
49 if (r < 0)
50 return r;
51
52 r = address_pool_new_from_string(m, &p, AF_INET, "192.168.0.0", 16);
53 if (r < 0)
54 return r;
55
56 r = address_pool_new_from_string(m, &p, AF_INET, "172.16.0.0", 12);
57 if (r < 0)
58 return r;
59
60 r = address_pool_new_from_string(m, &p, AF_INET, "10.0.0.0", 8);
61 if (r < 0)
62 return r;
63
64 return 0;
65 }
66
67 static int manager_reset_all(Manager *m) {
68 Link *link;
69 Iterator i;
70 int r;
71
72 assert(m);
73
74 HASHMAP_FOREACH(link, m->links, i) {
75 r = link_carrier_reset(link);
76 if (r < 0)
77 log_link_warning_errno(link, r, "Could not reset carrier: %m");
78 }
79
80 return 0;
81 }
82
83 static int match_prepare_for_sleep(sd_bus_message *message, void *userdata, sd_bus_error *ret_error) {
84 Manager *m = userdata;
85 int b, r;
86
87 assert(message);
88 assert(m);
89
90 r = sd_bus_message_read(message, "b", &b);
91 if (r < 0) {
92 log_debug_errno(r, "Failed to parse PrepareForSleep signal: %m");
93 return 0;
94 }
95
96 if (b)
97 return 0;
98
99 log_debug("Coming back from suspend, resetting all connections...");
100
101 (void) manager_reset_all(m);
102
103 return 0;
104 }
105
106 static int on_connected(sd_bus_message *message, void *userdata, sd_bus_error *ret_error) {
107 Manager *m = userdata;
108
109 assert(message);
110 assert(m);
111
112 /* Did we get a timezone or transient hostname from DHCP while D-Bus wasn't up yet? */
113 if (m->dynamic_hostname)
114 (void) manager_set_hostname(m, m->dynamic_hostname);
115 if (m->dynamic_timezone)
116 (void) manager_set_timezone(m, m->dynamic_timezone);
117 if (m->links_requesting_uuid)
118 (void) manager_request_product_uuid(m, NULL);
119
120 return 0;
121 }
122
123 int manager_connect_bus(Manager *m) {
124 int r;
125
126 assert(m);
127
128 if (m->bus)
129 return 0;
130
131 r = bus_open_system_watch_bind_with_description(&m->bus, "bus-api-network");
132 if (r < 0)
133 return log_error_errno(r, "Failed to connect to bus: %m");
134
135 r = sd_bus_add_object_vtable(m->bus, NULL, "/org/freedesktop/network1", "org.freedesktop.network1.Manager", manager_vtable, m);
136 if (r < 0)
137 return log_error_errno(r, "Failed to add manager object vtable: %m");
138
139 r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/network1/link", "org.freedesktop.network1.Link", link_vtable, link_object_find, m);
140 if (r < 0)
141 return log_error_errno(r, "Failed to add link object vtable: %m");
142
143 r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/network1/link", link_node_enumerator, m);
144 if (r < 0)
145 return log_error_errno(r, "Failed to add link enumerator: %m");
146
147 r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/network1/network", "org.freedesktop.network1.Network", network_vtable, network_object_find, m);
148 if (r < 0)
149 return log_error_errno(r, "Failed to add network object vtable: %m");
150
151 r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/network1/network", network_node_enumerator, m);
152 if (r < 0)
153 return log_error_errno(r, "Failed to add network enumerator: %m");
154
155 r = sd_bus_request_name_async(m->bus, NULL, "org.freedesktop.network1", 0, NULL, NULL);
156 if (r < 0)
157 return log_error_errno(r, "Failed to request name: %m");
158
159 r = sd_bus_attach_event(m->bus, m->event, 0);
160 if (r < 0)
161 return log_error_errno(r, "Failed to attach bus to event loop: %m");
162
163 r = sd_bus_match_signal_async(
164 m->bus,
165 NULL,
166 "org.freedesktop.DBus.Local",
167 NULL,
168 "org.freedesktop.DBus.Local",
169 "Connected",
170 on_connected, NULL, m);
171 if (r < 0)
172 return log_error_errno(r, "Failed to request match on Connected signal: %m");
173
174 r = sd_bus_match_signal_async(
175 m->bus,
176 NULL,
177 "org.freedesktop.login1",
178 "/org/freedesktop/login1",
179 "org.freedesktop.login1.Manager",
180 "PrepareForSleep",
181 match_prepare_for_sleep, NULL, m);
182 if (r < 0)
183 log_warning_errno(r, "Failed to request match for PrepareForSleep, ignoring: %m");
184
185 return 0;
186 }
187
188 static int manager_udev_process_link(sd_device_monitor *monitor, sd_device *device, void *userdata) {
189 Manager *m = userdata;
190 const char *action;
191 Link *link = NULL;
192 int r, ifindex;
193
194 assert(m);
195 assert(device);
196
197 r = sd_device_get_property_value(device, "ACTION", &action);
198 if (r < 0) {
199 log_device_debug_errno(device, r, "Failed to get 'ACTION' property, ignoring device: %m");
200 return 0;
201 }
202
203 if (!STR_IN_SET(action, "add", "change")) {
204 log_device_debug(device, "Ignoring udev %s event for device.", action);
205 return 0;
206 }
207
208 r = sd_device_get_ifindex(device, &ifindex);
209 if (r < 0) {
210 log_device_debug_errno(device, r, "Ignoring udev ADD event for device without ifindex or with invalid ifindex: %m");
211 return 0;
212 }
213
214 r = link_get(m, ifindex, &link);
215 if (r < 0) {
216 if (r != -ENODEV)
217 log_debug_errno(r, "Failed to get link from ifindex %i, ignoring: %m", ifindex);
218 return 0;
219 }
220
221 (void) link_initialized(link, device);
222
223 return 0;
224 }
225
226 static int manager_connect_udev(Manager *m) {
227 int r;
228
229 /* udev does not initialize devices inside containers,
230 * so we rely on them being already initialized before
231 * entering the container */
232 if (detect_container() > 0)
233 return 0;
234
235 r = sd_device_monitor_new(&m->device_monitor);
236 if (r < 0)
237 return log_error_errno(r, "Failed to initialize device monitor: %m");
238
239 r = sd_device_monitor_filter_add_match_subsystem_devtype(m->device_monitor, "net", NULL);
240 if (r < 0)
241 return log_error_errno(r, "Could not add device monitor filter: %m");
242
243 r = sd_device_monitor_attach_event(m->device_monitor, m->event);
244 if (r < 0)
245 return log_error_errno(r, "Failed to attach event to device monitor: %m");
246
247 r = sd_device_monitor_start(m->device_monitor, manager_udev_process_link, m);
248 if (r < 0)
249 return log_error_errno(r, "Failed to start device monitor: %m");
250
251 return 0;
252 }
253
254 int manager_rtnl_process_route(sd_netlink *rtnl, sd_netlink_message *message, void *userdata) {
255 Manager *m = userdata;
256 Link *link = NULL;
257 uint16_t type;
258 uint32_t ifindex, priority = 0;
259 unsigned char protocol, scope, tos, table, rt_type;
260 int family;
261 unsigned char dst_prefixlen, src_prefixlen;
262 union in_addr_union dst = {}, gw = {}, src = {}, prefsrc = {};
263 Route *route = NULL;
264 int r;
265
266 assert(rtnl);
267 assert(message);
268 assert(m);
269
270 if (sd_netlink_message_is_error(message)) {
271 r = sd_netlink_message_get_errno(message);
272 if (r < 0)
273 log_warning_errno(r, "rtnl: failed to receive route, ignoring: %m");
274
275 return 0;
276 }
277
278 r = sd_netlink_message_get_type(message, &type);
279 if (r < 0) {
280 log_warning_errno(r, "rtnl: could not get message type, ignoring: %m");
281 return 0;
282 } else if (!IN_SET(type, RTM_NEWROUTE, RTM_DELROUTE)) {
283 log_warning("rtnl: received unexpected message type when processing route, ignoring");
284 return 0;
285 }
286
287 r = sd_netlink_message_read_u32(message, RTA_OIF, &ifindex);
288 if (r == -ENODATA) {
289 log_debug("rtnl: received route without ifindex, ignoring");
290 return 0;
291 } else if (r < 0) {
292 log_warning_errno(r, "rtnl: could not get ifindex from route, ignoring: %m");
293 return 0;
294 } else if (ifindex <= 0) {
295 log_warning("rtnl: received route message with invalid ifindex, ignoring: %d", ifindex);
296 return 0;
297 } else {
298 r = link_get(m, ifindex, &link);
299 if (r < 0 || !link) {
300 /* when enumerating we might be out of sync, but we will
301 * get the route again, so just ignore it */
302 if (!m->enumerating)
303 log_warning("rtnl: received route for nonexistent link (%d), ignoring", ifindex);
304 return 0;
305 }
306 }
307
308 r = sd_rtnl_message_route_get_family(message, &family);
309 if (r < 0 || !IN_SET(family, AF_INET, AF_INET6)) {
310 log_link_warning(link, "rtnl: received address with invalid family, ignoring");
311 return 0;
312 }
313
314 r = sd_rtnl_message_route_get_protocol(message, &protocol);
315 if (r < 0) {
316 log_warning_errno(r, "rtnl: could not get route protocol: %m");
317 return 0;
318 }
319
320 switch (family) {
321 case AF_INET:
322 r = sd_netlink_message_read_in_addr(message, RTA_DST, &dst.in);
323 if (r < 0 && r != -ENODATA) {
324 log_link_warning_errno(link, r, "rtnl: received route without valid destination, ignoring: %m");
325 return 0;
326 }
327
328 r = sd_netlink_message_read_in_addr(message, RTA_GATEWAY, &gw.in);
329 if (r < 0 && r != -ENODATA) {
330 log_link_warning_errno(link, r, "rtnl: received route with invalid gateway, ignoring: %m");
331 return 0;
332 }
333
334 r = sd_netlink_message_read_in_addr(message, RTA_SRC, &src.in);
335 if (r < 0 && r != -ENODATA) {
336 log_link_warning_errno(link, r, "rtnl: received route with invalid source, ignoring: %m");
337 return 0;
338 }
339
340 r = sd_netlink_message_read_in_addr(message, RTA_PREFSRC, &prefsrc.in);
341 if (r < 0 && r != -ENODATA) {
342 log_link_warning_errno(link, r, "rtnl: received route with invalid preferred source, ignoring: %m");
343 return 0;
344 }
345
346 break;
347
348 case AF_INET6:
349 r = sd_netlink_message_read_in6_addr(message, RTA_DST, &dst.in6);
350 if (r < 0 && r != -ENODATA) {
351 log_link_warning_errno(link, r, "rtnl: received route without valid destination, ignoring: %m");
352 return 0;
353 }
354
355 r = sd_netlink_message_read_in6_addr(message, RTA_GATEWAY, &gw.in6);
356 if (r < 0 && r != -ENODATA) {
357 log_link_warning_errno(link, r, "rtnl: received route with invalid gateway, ignoring: %m");
358 return 0;
359 }
360
361 r = sd_netlink_message_read_in6_addr(message, RTA_SRC, &src.in6);
362 if (r < 0 && r != -ENODATA) {
363 log_link_warning_errno(link, r, "rtnl: received route with invalid source, ignoring: %m");
364 return 0;
365 }
366
367 r = sd_netlink_message_read_in6_addr(message, RTA_PREFSRC, &prefsrc.in6);
368 if (r < 0 && r != -ENODATA) {
369 log_link_warning_errno(link, r, "rtnl: received route with invalid preferred source, ignoring: %m");
370 return 0;
371 }
372
373 break;
374
375 default:
376 assert_not_reached("Received unsupported address family");
377 return 0;
378 }
379
380 r = sd_rtnl_message_route_get_dst_prefixlen(message, &dst_prefixlen);
381 if (r < 0) {
382 log_link_warning_errno(link, r, "rtnl: received route with invalid destination prefixlen, ignoring: %m");
383 return 0;
384 }
385
386 r = sd_rtnl_message_route_get_src_prefixlen(message, &src_prefixlen);
387 if (r < 0) {
388 log_link_warning_errno(link, r, "rtnl: received route with invalid source prefixlen, ignoring: %m");
389 return 0;
390 }
391
392 r = sd_rtnl_message_route_get_scope(message, &scope);
393 if (r < 0) {
394 log_link_warning_errno(link, r, "rtnl: received route with invalid scope, ignoring: %m");
395 return 0;
396 }
397
398 r = sd_rtnl_message_route_get_tos(message, &tos);
399 if (r < 0) {
400 log_link_warning_errno(link, r, "rtnl: received route with invalid tos, ignoring: %m");
401 return 0;
402 }
403
404 r = sd_rtnl_message_route_get_type(message, &rt_type);
405 if (r < 0) {
406 log_link_warning_errno(link, r, "rtnl: received route with invalid type, ignoring: %m");
407 return 0;
408 }
409
410 r = sd_rtnl_message_route_get_table(message, &table);
411 if (r < 0) {
412 log_link_warning_errno(link, r, "rtnl: received route with invalid table, ignoring: %m");
413 return 0;
414 }
415
416 r = sd_netlink_message_read_u32(message, RTA_PRIORITY, &priority);
417 if (r < 0 && r != -ENODATA) {
418 log_link_warning_errno(link, r, "rtnl: received route with invalid priority, ignoring: %m");
419 return 0;
420 }
421
422 (void) route_get(link, family, &dst, dst_prefixlen, tos, priority, table, &route);
423
424 switch (type) {
425 case RTM_NEWROUTE:
426 if (!route) {
427 /* A route appeared that we did not request */
428 r = route_add_foreign(link, family, &dst, dst_prefixlen, tos, priority, table, &route);
429 if (r < 0) {
430 log_link_warning_errno(link, r, "Failed to add route, ignoring: %m");
431 return 0;
432 }
433 }
434
435 route_update(route, &src, src_prefixlen, &gw, &prefsrc, scope, protocol, rt_type);
436
437 break;
438
439 case RTM_DELROUTE:
440 route_free(route);
441 break;
442
443 default:
444 assert_not_reached("Received invalid RTNL message type");
445 }
446
447 return 1;
448 }
449
450 int manager_rtnl_process_address(sd_netlink *rtnl, sd_netlink_message *message, void *userdata) {
451 Manager *m = userdata;
452 Link *link = NULL;
453 uint16_t type;
454 unsigned char flags;
455 int family;
456 unsigned char prefixlen;
457 unsigned char scope;
458 union in_addr_union in_addr;
459 struct ifa_cacheinfo cinfo;
460 Address *address = NULL;
461 char buf[INET6_ADDRSTRLEN], valid_buf[FORMAT_TIMESPAN_MAX];
462 const char *valid_str = NULL;
463 int r, ifindex;
464
465 assert(rtnl);
466 assert(message);
467 assert(m);
468
469 if (sd_netlink_message_is_error(message)) {
470 r = sd_netlink_message_get_errno(message);
471 if (r < 0)
472 log_warning_errno(r, "rtnl: failed to receive address, ignoring: %m");
473
474 return 0;
475 }
476
477 r = sd_netlink_message_get_type(message, &type);
478 if (r < 0) {
479 log_warning_errno(r, "rtnl: could not get message type, ignoring: %m");
480 return 0;
481 } else if (!IN_SET(type, RTM_NEWADDR, RTM_DELADDR)) {
482 log_warning("rtnl: received unexpected message type when processing address, ignoring");
483 return 0;
484 }
485
486 r = sd_rtnl_message_addr_get_ifindex(message, &ifindex);
487 if (r < 0) {
488 log_warning_errno(r, "rtnl: could not get ifindex from address, ignoring: %m");
489 return 0;
490 } else if (ifindex <= 0) {
491 log_warning("rtnl: received address message with invalid ifindex, ignoring: %d", ifindex);
492 return 0;
493 } else {
494 r = link_get(m, ifindex, &link);
495 if (r < 0 || !link) {
496 /* when enumerating we might be out of sync, but we will
497 * get the address again, so just ignore it */
498 if (!m->enumerating)
499 log_warning("rtnl: received address for nonexistent link (%d), ignoring", ifindex);
500 return 0;
501 }
502 }
503
504 r = sd_rtnl_message_addr_get_family(message, &family);
505 if (r < 0 || !IN_SET(family, AF_INET, AF_INET6)) {
506 log_link_warning(link, "rtnl: received address with invalid family, ignoring");
507 return 0;
508 }
509
510 r = sd_rtnl_message_addr_get_prefixlen(message, &prefixlen);
511 if (r < 0) {
512 log_link_warning_errno(link, r, "rtnl: received address with invalid prefixlen, ignoring: %m");
513 return 0;
514 }
515
516 r = sd_rtnl_message_addr_get_scope(message, &scope);
517 if (r < 0) {
518 log_link_warning_errno(link, r, "rtnl: received address with invalid scope, ignoring: %m");
519 return 0;
520 }
521
522 r = sd_rtnl_message_addr_get_flags(message, &flags);
523 if (r < 0) {
524 log_link_warning_errno(link, r, "rtnl: received address with invalid flags, ignoring: %m");
525 return 0;
526 }
527
528 switch (family) {
529 case AF_INET:
530 r = sd_netlink_message_read_in_addr(message, IFA_LOCAL, &in_addr.in);
531 if (r < 0) {
532 log_link_warning_errno(link, r, "rtnl: received address without valid address, ignoring: %m");
533 return 0;
534 }
535
536 break;
537
538 case AF_INET6:
539 r = sd_netlink_message_read_in6_addr(message, IFA_ADDRESS, &in_addr.in6);
540 if (r < 0) {
541 log_link_warning_errno(link, r, "rtnl: received address without valid address, ignoring: %m");
542 return 0;
543 }
544
545 break;
546
547 default:
548 assert_not_reached("Received unsupported address family");
549 }
550
551 if (!inet_ntop(family, &in_addr, buf, INET6_ADDRSTRLEN)) {
552 log_link_warning(link, "Could not print address, ignoring");
553 return 0;
554 }
555
556 r = sd_netlink_message_read_cache_info(message, IFA_CACHEINFO, &cinfo);
557 if (r < 0 && r != -ENODATA) {
558 log_link_warning_errno(link, r, "rtnl: cannot get IFA_CACHEINFO attribute, ignoring: %m");
559 return 0;
560 } else if (r >= 0) {
561 if (cinfo.ifa_valid != CACHE_INFO_INFINITY_LIFE_TIME)
562 valid_str = format_timespan(valid_buf, FORMAT_TIMESPAN_MAX,
563 cinfo.ifa_valid * USEC_PER_SEC,
564 USEC_PER_SEC);
565 }
566
567 (void) address_get(link, family, &in_addr, prefixlen, &address);
568
569 switch (type) {
570 case RTM_NEWADDR:
571 if (address)
572 log_link_debug(link, "Updating address: %s/%u (valid %s%s)", buf, prefixlen,
573 valid_str ? "for " : "forever", strempty(valid_str));
574 else {
575 /* An address appeared that we did not request */
576 r = address_add_foreign(link, family, &in_addr, prefixlen, &address);
577 if (r < 0) {
578 log_link_warning_errno(link, r, "Failed to add address %s/%u, ignoring: %m", buf, prefixlen);
579 return 0;
580 } else
581 log_link_debug(link, "Adding address: %s/%u (valid %s%s)", buf, prefixlen,
582 valid_str ? "for " : "forever", strempty(valid_str));
583 }
584
585 r = address_update(address, flags, scope, &cinfo);
586 if (r < 0) {
587 log_link_warning_errno(link, r, "Failed to update address %s/%u, ignoring: %m", buf, prefixlen);
588 return 0;
589 }
590
591 break;
592
593 case RTM_DELADDR:
594
595 if (address) {
596 log_link_debug(link, "Removing address: %s/%u (valid %s%s)", buf, prefixlen,
597 valid_str ? "for " : "forever", strempty(valid_str));
598 (void) address_drop(address);
599 } else
600 log_link_warning(link, "Removing non-existent address: %s/%u (valid %s%s), ignoring", buf, prefixlen,
601 valid_str ? "for " : "forever", strempty(valid_str));
602
603 break;
604 default:
605 assert_not_reached("Received invalid RTNL message type");
606 }
607
608 return 1;
609 }
610
611 static int manager_rtnl_process_link(sd_netlink *rtnl, sd_netlink_message *message, void *userdata) {
612 Manager *m = userdata;
613 Link *link = NULL;
614 NetDev *netdev = NULL;
615 uint16_t type;
616 const char *name;
617 int r, ifindex;
618
619 assert(rtnl);
620 assert(message);
621 assert(m);
622
623 if (sd_netlink_message_is_error(message)) {
624 r = sd_netlink_message_get_errno(message);
625 if (r < 0)
626 log_warning_errno(r, "rtnl: Could not receive link, ignoring: %m");
627
628 return 0;
629 }
630
631 r = sd_netlink_message_get_type(message, &type);
632 if (r < 0) {
633 log_warning_errno(r, "rtnl: Could not get message type, ignoring: %m");
634 return 0;
635 } else if (!IN_SET(type, RTM_NEWLINK, RTM_DELLINK)) {
636 log_warning("rtnl: Received unexpected message type when processing link, ignoring");
637 return 0;
638 }
639
640 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
641 if (r < 0) {
642 log_warning_errno(r, "rtnl: Could not get ifindex from link, ignoring: %m");
643 return 0;
644 } else if (ifindex <= 0) {
645 log_warning("rtnl: received link message with invalid ifindex %d, ignoring", ifindex);
646 return 0;
647 }
648
649 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &name);
650 if (r < 0) {
651 log_warning_errno(r, "rtnl: Received link message without ifname, ignoring: %m");
652 return 0;
653 }
654
655 (void) link_get(m, ifindex, &link);
656 (void) netdev_get(m, name, &netdev);
657
658 switch (type) {
659 case RTM_NEWLINK:
660 if (!link) {
661 /* link is new, so add it */
662 r = link_add(m, message, &link);
663 if (r < 0) {
664 log_warning_errno(r, "Could not add new link, ignoring: %m");
665 return 0;
666 }
667 }
668
669 if (netdev) {
670 /* netdev exists, so make sure the ifindex matches */
671 r = netdev_set_ifindex(netdev, message);
672 if (r < 0) {
673 log_warning_errno(r, "Could not set ifindex on netdev, ignoring: %m");
674 return 0;
675 }
676 }
677
678 r = link_update(link, message);
679 if (r < 0) {
680 log_warning_errno(r, "Could not update link, ignoring: %m");
681 return 0;
682 }
683
684 break;
685
686 case RTM_DELLINK:
687 link_drop(link);
688 netdev_drop(netdev);
689
690 break;
691
692 default:
693 assert_not_reached("Received invalid RTNL message type.");
694 }
695
696 return 1;
697 }
698
699 int manager_rtnl_process_rule(sd_netlink *rtnl, sd_netlink_message *message, void *userdata) {
700 uint8_t tos = 0, to_prefixlen = 0, from_prefixlen = 0;
701 union in_addr_union to = {}, from = {};
702 RoutingPolicyRule *rule = NULL;
703 uint32_t fwmark = 0, table = 0;
704 const char *iif = NULL, *oif = NULL;
705 Manager *m = userdata;
706 uint16_t type;
707 int family;
708 int r;
709
710 assert(rtnl);
711 assert(message);
712 assert(m);
713
714 if (sd_netlink_message_is_error(message)) {
715 r = sd_netlink_message_get_errno(message);
716 if (r < 0)
717 log_warning_errno(r, "rtnl: failed to receive rule, ignoring: %m");
718
719 return 0;
720 }
721
722 r = sd_netlink_message_get_type(message, &type);
723 if (r < 0) {
724 log_warning_errno(r, "rtnl: could not get message type, ignoring: %m");
725 return 0;
726 } else if (!IN_SET(type, RTM_NEWRULE, RTM_DELRULE)) {
727 log_warning("rtnl: received unexpected message type '%u' when processing rule, ignoring", type);
728 return 0;
729 }
730
731 r = sd_rtnl_message_get_family(message, &family);
732 if (r < 0) {
733 log_warning_errno(r, "rtnl: could not get rule family, ignoring: %m");
734 return 0;
735 } else if (!IN_SET(family, AF_INET, AF_INET6)) {
736 log_debug("rtnl: received address with invalid family %u, ignoring", family);
737 return 0;
738 }
739
740 switch (family) {
741 case AF_INET:
742 r = sd_netlink_message_read_in_addr(message, FRA_SRC, &from.in);
743 if (r < 0 && r != -ENODATA) {
744 log_warning_errno(r, "rtnl: could not get FRA_SRC attribute, ignoring: %m");
745 return 0;
746 } else if (r >= 0) {
747 r = sd_rtnl_message_routing_policy_rule_get_rtm_src_prefixlen(message, &from_prefixlen);
748 if (r < 0) {
749 log_warning_errno(r, "rtnl: failed to retrieve rule from prefix length, ignoring: %m");
750 return 0;
751 }
752 }
753
754 r = sd_netlink_message_read_in_addr(message, FRA_DST, &to.in);
755 if (r < 0 && r != -ENODATA) {
756 log_warning_errno(r, "rtnl: could not get FRA_DST attribute, ignoring: %m");
757 return 0;
758 } else if (r >= 0) {
759 r = sd_rtnl_message_routing_policy_rule_get_rtm_dst_prefixlen(message, &to_prefixlen);
760 if (r < 0) {
761 log_warning_errno(r, "rtnl: failed to retrieve rule to prefix length, ignoring: %m");
762 return 0;
763 }
764 }
765
766 break;
767
768 case AF_INET6:
769 r = sd_netlink_message_read_in6_addr(message, FRA_SRC, &from.in6);
770 if (r < 0 && r != -ENODATA) {
771 log_warning_errno(r, "rtnl: could not get FRA_SRC attribute, ignoring: %m");
772 return 0;
773 } else if (r >= 0) {
774 r = sd_rtnl_message_routing_policy_rule_get_rtm_src_prefixlen(message, &from_prefixlen);
775 if (r < 0) {
776 log_warning_errno(r, "rtnl: failed to retrieve rule from prefix length, ignoring: %m");
777 return 0;
778 }
779 }
780
781 r = sd_netlink_message_read_in6_addr(message, FRA_DST, &to.in6);
782 if (r < 0 && r != -ENODATA) {
783 log_warning_errno(r, "rtnl: could not get FRA_DST attribute, ignoring: %m");
784 return 0;
785 } else if (r >= 0) {
786 r = sd_rtnl_message_routing_policy_rule_get_rtm_dst_prefixlen(message, &to_prefixlen);
787 if (r < 0) {
788 log_warning_errno(r, "rtnl: failed to retrieve rule to prefix length, ignoring: %m");
789 return 0;
790 }
791 }
792
793 break;
794
795 default:
796 assert_not_reached("Received unsupported address family");
797 }
798
799 if (from_prefixlen == 0 && to_prefixlen == 0)
800 return 0;
801
802 r = sd_netlink_message_read_u32(message, FRA_FWMARK, &fwmark);
803 if (r < 0 && r != -ENODATA) {
804 log_warning_errno(r, "rtnl: could not get FRA_FWMARK attribute, ignoring: %m");
805 return 0;
806 }
807
808 r = sd_netlink_message_read_u32(message, FRA_TABLE, &table);
809 if (r < 0 && r != -ENODATA) {
810 log_warning_errno(r, "rtnl: could not get FRA_TABLE attribute, ignoring: %m");
811 return 0;
812 }
813
814 r = sd_rtnl_message_routing_policy_rule_get_tos(message, &tos);
815 if (r < 0 && r != -ENODATA) {
816 log_warning_errno(r, "rtnl: could not get ip rule TOS, ignoring: %m");
817 return 0;
818 }
819
820 r = sd_netlink_message_read_string(message, FRA_IIFNAME, &iif);
821 if (r < 0 && r != -ENODATA) {
822 log_warning_errno(r, "rtnl: could not get FRA_IIFNAME attribute, ignoring: %m");
823 return 0;
824 }
825
826 r = sd_netlink_message_read_string(message, FRA_OIFNAME, &oif);
827 if (r < 0 && r != -ENODATA) {
828 log_warning_errno(r, "rtnl: could not get FRA_OIFNAME attribute, ignoring: %m");
829 return 0;
830 }
831
832 (void) routing_policy_rule_get(m, family, &from, from_prefixlen, &to, to_prefixlen, tos, fwmark, table, iif, oif, &rule);
833
834 switch (type) {
835 case RTM_NEWRULE:
836 if (!rule) {
837 r = routing_policy_rule_add_foreign(m, family, &from, from_prefixlen, &to, to_prefixlen, tos, fwmark, table, iif, oif, &rule);
838 if (r < 0) {
839 log_warning_errno(r, "Could not add rule, ignoring: %m");
840 return 0;
841 }
842 }
843 break;
844 case RTM_DELRULE:
845 routing_policy_rule_free(rule);
846
847 break;
848
849 default:
850 assert_not_reached("Received invalid RTNL message type");
851 }
852
853 return 1;
854 }
855
856 static int systemd_netlink_fd(void) {
857 int n, fd, rtnl_fd = -EINVAL;
858
859 n = sd_listen_fds(true);
860 if (n <= 0)
861 return -EINVAL;
862
863 for (fd = SD_LISTEN_FDS_START; fd < SD_LISTEN_FDS_START + n; fd ++) {
864 if (sd_is_socket(fd, AF_NETLINK, SOCK_RAW, -1) > 0) {
865 if (rtnl_fd >= 0)
866 return -EINVAL;
867
868 rtnl_fd = fd;
869 }
870 }
871
872 return rtnl_fd;
873 }
874
875 static int manager_connect_genl(Manager *m) {
876 int r;
877
878 assert(m);
879
880 r = sd_genl_socket_open(&m->genl);
881 if (r < 0)
882 return r;
883
884 r = sd_netlink_inc_rcvbuf(m->genl, RCVBUF_SIZE);
885 if (r < 0)
886 return r;
887
888 r = sd_netlink_attach_event(m->genl, m->event, 0);
889 if (r < 0)
890 return r;
891
892 return 0;
893 }
894
895 static int manager_connect_rtnl(Manager *m) {
896 int fd, r;
897
898 assert(m);
899
900 fd = systemd_netlink_fd();
901 if (fd < 0)
902 r = sd_netlink_open(&m->rtnl);
903 else
904 r = sd_netlink_open_fd(&m->rtnl, fd);
905 if (r < 0)
906 return r;
907
908 r = sd_netlink_inc_rcvbuf(m->rtnl, RCVBUF_SIZE);
909 if (r < 0)
910 return r;
911
912 r = sd_netlink_attach_event(m->rtnl, m->event, 0);
913 if (r < 0)
914 return r;
915
916 r = sd_netlink_add_match(m->rtnl, NULL, RTM_NEWLINK, &manager_rtnl_process_link, NULL, m, "network-rtnl_process_link");
917 if (r < 0)
918 return r;
919
920 r = sd_netlink_add_match(m->rtnl, NULL, RTM_DELLINK, &manager_rtnl_process_link, NULL, m, "network-rtnl_process_link");
921 if (r < 0)
922 return r;
923
924 r = sd_netlink_add_match(m->rtnl, NULL, RTM_NEWADDR, &manager_rtnl_process_address, NULL, m, "network-rtnl_process_address");
925 if (r < 0)
926 return r;
927
928 r = sd_netlink_add_match(m->rtnl, NULL, RTM_DELADDR, &manager_rtnl_process_address, NULL, m, "network-rtnl_process_address");
929 if (r < 0)
930 return r;
931
932 r = sd_netlink_add_match(m->rtnl, NULL, RTM_NEWROUTE, &manager_rtnl_process_route, NULL, m, "network-rtnl_process_route");
933 if (r < 0)
934 return r;
935
936 r = sd_netlink_add_match(m->rtnl, NULL, RTM_DELROUTE, &manager_rtnl_process_route, NULL, m, "network-rtnl_process_route");
937 if (r < 0)
938 return r;
939
940 r = sd_netlink_add_match(m->rtnl, NULL, RTM_NEWRULE, &manager_rtnl_process_rule, NULL, m, "network-rtnl_process_rule");
941 if (r < 0)
942 return r;
943
944 r = sd_netlink_add_match(m->rtnl, NULL, RTM_DELRULE, &manager_rtnl_process_rule, NULL, m, "network-rtnl_process_rule");
945 if (r < 0)
946 return r;
947
948 return 0;
949 }
950
951 static int ordered_set_put_in_addr_data(OrderedSet *s, const struct in_addr_data *address) {
952 char *p;
953 int r;
954
955 assert(s);
956 assert(address);
957
958 r = in_addr_to_string(address->family, &address->address, &p);
959 if (r < 0)
960 return r;
961
962 r = ordered_set_consume(s, p);
963 if (r == -EEXIST)
964 return 0;
965
966 return r;
967 }
968
969 static int ordered_set_put_in_addr_datav(OrderedSet *s, const struct in_addr_data *addresses, unsigned n) {
970 int r, c = 0;
971 unsigned i;
972
973 assert(s);
974 assert(addresses || n == 0);
975
976 for (i = 0; i < n; i++) {
977 r = ordered_set_put_in_addr_data(s, addresses+i);
978 if (r < 0)
979 return r;
980
981 c += r;
982 }
983
984 return c;
985 }
986
987 static int ordered_set_put_in4_addr(OrderedSet *s, const struct in_addr *address) {
988 char *p;
989 int r;
990
991 assert(s);
992 assert(address);
993
994 r = in_addr_to_string(AF_INET, (const union in_addr_union*) address, &p);
995 if (r < 0)
996 return r;
997
998 r = ordered_set_consume(s, p);
999 if (r == -EEXIST)
1000 return 0;
1001
1002 return r;
1003 }
1004
1005 static int ordered_set_put_in4_addrv(OrderedSet *s, const struct in_addr *addresses, unsigned n) {
1006 int r, c = 0;
1007 unsigned i;
1008
1009 assert(s);
1010 assert(n == 0 || addresses);
1011
1012 for (i = 0; i < n; i++) {
1013 r = ordered_set_put_in4_addr(s, addresses+i);
1014 if (r < 0)
1015 return r;
1016
1017 c += r;
1018 }
1019
1020 return c;
1021 }
1022
1023 static void print_string_set(FILE *f, const char *field, OrderedSet *s) {
1024 bool space = false;
1025 Iterator i;
1026 char *p;
1027
1028 if (ordered_set_isempty(s))
1029 return;
1030
1031 fputs(field, f);
1032
1033 ORDERED_SET_FOREACH(p, s, i)
1034 fputs_with_space(f, p, NULL, &space);
1035
1036 fputc('\n', f);
1037 }
1038
1039 static int manager_save(Manager *m) {
1040 _cleanup_ordered_set_free_free_ OrderedSet *dns = NULL, *ntp = NULL, *search_domains = NULL, *route_domains = NULL;
1041 Link *link;
1042 Iterator i;
1043 _cleanup_free_ char *temp_path = NULL;
1044 _cleanup_fclose_ FILE *f = NULL;
1045 LinkOperationalState operstate = LINK_OPERSTATE_OFF;
1046 const char *operstate_str;
1047 int r;
1048
1049 assert(m);
1050 assert(m->state_file);
1051
1052 /* We add all NTP and DNS server to a set, to filter out duplicates */
1053 dns = ordered_set_new(&string_hash_ops);
1054 if (!dns)
1055 return -ENOMEM;
1056
1057 ntp = ordered_set_new(&string_hash_ops);
1058 if (!ntp)
1059 return -ENOMEM;
1060
1061 search_domains = ordered_set_new(&dns_name_hash_ops);
1062 if (!search_domains)
1063 return -ENOMEM;
1064
1065 route_domains = ordered_set_new(&dns_name_hash_ops);
1066 if (!route_domains)
1067 return -ENOMEM;
1068
1069 HASHMAP_FOREACH(link, m->links, i) {
1070 if (link->flags & IFF_LOOPBACK)
1071 continue;
1072
1073 if (link->operstate > operstate)
1074 operstate = link->operstate;
1075
1076 if (!link->network)
1077 continue;
1078
1079 /* First add the static configured entries */
1080 r = ordered_set_put_in_addr_datav(dns, link->network->dns, link->network->n_dns);
1081 if (r < 0)
1082 return r;
1083
1084 r = ordered_set_put_strdupv(ntp, link->network->ntp);
1085 if (r < 0)
1086 return r;
1087
1088 r = ordered_set_put_strdupv(search_domains, link->network->search_domains);
1089 if (r < 0)
1090 return r;
1091
1092 r = ordered_set_put_strdupv(route_domains, link->network->route_domains);
1093 if (r < 0)
1094 return r;
1095
1096 if (!link->dhcp_lease)
1097 continue;
1098
1099 /* Secondly, add the entries acquired via DHCP */
1100 if (link->network->dhcp_use_dns) {
1101 const struct in_addr *addresses;
1102
1103 r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
1104 if (r > 0) {
1105 r = ordered_set_put_in4_addrv(dns, addresses, r);
1106 if (r < 0)
1107 return r;
1108 } else if (r < 0 && r != -ENODATA)
1109 return r;
1110 }
1111
1112 if (link->network->dhcp_use_ntp) {
1113 const struct in_addr *addresses;
1114
1115 r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
1116 if (r > 0) {
1117 r = ordered_set_put_in4_addrv(ntp, addresses, r);
1118 if (r < 0)
1119 return r;
1120 } else if (r < 0 && r != -ENODATA)
1121 return r;
1122 }
1123
1124 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
1125 const char *domainname;
1126 char **domains = NULL;
1127
1128 OrderedSet *target_domains = (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) ? search_domains : route_domains;
1129 r = sd_dhcp_lease_get_domainname(link->dhcp_lease, &domainname);
1130 if (r >= 0) {
1131 r = ordered_set_put_strdup(target_domains, domainname);
1132 if (r < 0)
1133 return r;
1134 } else if (r != -ENODATA)
1135 return r;
1136
1137 r = sd_dhcp_lease_get_search_domains(link->dhcp_lease, &domains);
1138 if (r >= 0) {
1139 r = ordered_set_put_strdupv(target_domains, domains);
1140 if (r < 0)
1141 return r;
1142 } else if (r != -ENODATA)
1143 return r;
1144 }
1145 }
1146
1147 operstate_str = link_operstate_to_string(operstate);
1148 assert(operstate_str);
1149
1150 r = fopen_temporary(m->state_file, &f, &temp_path);
1151 if (r < 0)
1152 return r;
1153
1154 (void) __fsetlocking(f, FSETLOCKING_BYCALLER);
1155 (void) fchmod(fileno(f), 0644);
1156
1157 fprintf(f,
1158 "# This is private data. Do not parse.\n"
1159 "OPER_STATE=%s\n", operstate_str);
1160
1161 print_string_set(f, "DNS=", dns);
1162 print_string_set(f, "NTP=", ntp);
1163 print_string_set(f, "DOMAINS=", search_domains);
1164 print_string_set(f, "ROUTE_DOMAINS=", route_domains);
1165
1166 r = routing_policy_serialize_rules(m->rules, f);
1167 if (r < 0)
1168 goto fail;
1169
1170 r = fflush_and_check(f);
1171 if (r < 0)
1172 goto fail;
1173
1174 if (rename(temp_path, m->state_file) < 0) {
1175 r = -errno;
1176 goto fail;
1177 }
1178
1179 if (m->operational_state != operstate) {
1180 m->operational_state = operstate;
1181 r = manager_send_changed(m, "OperationalState", NULL);
1182 if (r < 0)
1183 log_error_errno(r, "Could not emit changed OperationalState: %m");
1184 }
1185
1186 m->dirty = false;
1187
1188 return 0;
1189
1190 fail:
1191 (void) unlink(m->state_file);
1192 (void) unlink(temp_path);
1193
1194 return log_error_errno(r, "Failed to save network state to %s: %m", m->state_file);
1195 }
1196
1197 static int manager_dirty_handler(sd_event_source *s, void *userdata) {
1198 Manager *m = userdata;
1199 Link *link;
1200 Iterator i;
1201
1202 assert(m);
1203
1204 if (m->dirty)
1205 manager_save(m);
1206
1207 SET_FOREACH(link, m->dirty_links, i)
1208 if (link_save(link) >= 0)
1209 link_clean(link);
1210
1211 return 1;
1212 }
1213
1214 Link *manager_dhcp6_prefix_get(Manager *m, struct in6_addr *addr) {
1215 assert_return(m, NULL);
1216 assert_return(m->dhcp6_prefixes, NULL);
1217 assert_return(addr, NULL);
1218
1219 return hashmap_get(m->dhcp6_prefixes, addr);
1220 }
1221
1222 static int dhcp6_route_add_handler(sd_netlink *nl, sd_netlink_message *m, void *userdata) {
1223 Link *link = userdata;
1224 int r;
1225
1226 assert(link);
1227
1228 r = sd_netlink_message_get_errno(m);
1229 if (r < 0 && r != -EEXIST)
1230 log_link_debug_errno(link, r, "Received error adding DHCPv6 Prefix Delegation route: %m");
1231
1232 return 0;
1233 }
1234
1235 int manager_dhcp6_prefix_add(Manager *m, struct in6_addr *addr, Link *link) {
1236 int r;
1237 Route *route;
1238 _cleanup_free_ char *buf = NULL;
1239
1240 assert_return(m, -EINVAL);
1241 assert_return(m->dhcp6_prefixes, -ENODATA);
1242 assert_return(addr, -EINVAL);
1243
1244 r = route_add(link, AF_INET6, (union in_addr_union *) addr, 64,
1245 0, 0, 0, &route);
1246 if (r < 0)
1247 return r;
1248
1249 r = route_configure(route, link, dhcp6_route_add_handler);
1250 if (r < 0)
1251 return r;
1252
1253 (void) in_addr_to_string(AF_INET6, (union in_addr_union *) addr, &buf);
1254 log_link_debug(link, "Adding prefix route %s/64", strnull(buf));
1255
1256 return hashmap_put(m->dhcp6_prefixes, addr, link);
1257 }
1258
1259 static int dhcp6_route_remove_handler(sd_netlink *nl, sd_netlink_message *m, void *userdata) {
1260 Link *link = userdata;
1261 int r;
1262
1263 assert(link);
1264
1265 r = sd_netlink_message_get_errno(m);
1266 if (r < 0)
1267 log_link_debug_errno(link, r, "Received error on DHCPv6 Prefix Delegation route removal: %m");
1268
1269 return 1;
1270 }
1271
1272 static int manager_dhcp6_prefix_remove(Manager *m, struct in6_addr *addr) {
1273 Link *l;
1274 int r;
1275 Route *route;
1276 _cleanup_free_ char *buf = NULL;
1277
1278 assert_return(m, -EINVAL);
1279 assert_return(m->dhcp6_prefixes, -ENODATA);
1280 assert_return(addr, -EINVAL);
1281
1282 l = hashmap_remove(m->dhcp6_prefixes, addr);
1283 if (!l)
1284 return -EINVAL;
1285
1286 (void) sd_radv_remove_prefix(l->radv, addr, 64);
1287 r = route_get(l, AF_INET6, (union in_addr_union *) addr, 64,
1288 0, 0, 0, &route);
1289 if (r < 0)
1290 return r;
1291
1292 r = route_remove(route, l, dhcp6_route_remove_handler);
1293 if (r < 0)
1294 return r;
1295
1296 (void) in_addr_to_string(AF_INET6, (union in_addr_union *) addr, &buf);
1297 log_link_debug(l, "Removing prefix route %s/64", strnull(buf));
1298
1299 return 0;
1300 }
1301
1302 int manager_dhcp6_prefix_remove_all(Manager *m, Link *link) {
1303 Iterator i;
1304 Link *l;
1305 struct in6_addr *addr;
1306
1307 assert_return(m, -EINVAL);
1308 assert_return(link, -EINVAL);
1309
1310 HASHMAP_FOREACH_KEY(l, addr, m->dhcp6_prefixes, i) {
1311 if (l != link)
1312 continue;
1313
1314 (void) manager_dhcp6_prefix_remove(m, addr);
1315 }
1316
1317 return 0;
1318 }
1319
1320 static void dhcp6_prefixes_hash_func(const void *p, struct siphash *state) {
1321 const struct in6_addr *addr = p;
1322
1323 assert(p);
1324
1325 siphash24_compress(addr, sizeof(*addr), state);
1326 }
1327
1328 static int dhcp6_prefixes_compare_func(const void *_a, const void *_b) {
1329 const struct in6_addr *a = _a, *b = _b;
1330
1331 return memcmp(a, b, sizeof(*a));
1332 }
1333
1334 static const struct hash_ops dhcp6_prefixes_hash_ops = {
1335 .hash = dhcp6_prefixes_hash_func,
1336 .compare = dhcp6_prefixes_compare_func,
1337 };
1338
1339 int manager_new(Manager **ret) {
1340 _cleanup_(manager_freep) Manager *m = NULL;
1341 int r;
1342
1343 m = new0(Manager, 1);
1344 if (!m)
1345 return -ENOMEM;
1346
1347 m->state_file = strdup("/run/systemd/netif/state");
1348 if (!m->state_file)
1349 return -ENOMEM;
1350
1351 r = sd_event_default(&m->event);
1352 if (r < 0)
1353 return r;
1354
1355 (void) sd_event_set_watchdog(m->event, true);
1356 (void) sd_event_add_signal(m->event, NULL, SIGTERM, NULL, NULL);
1357 (void) sd_event_add_signal(m->event, NULL, SIGINT, NULL, NULL);
1358
1359 r = sd_event_add_post(m->event, NULL, manager_dirty_handler, m);
1360 if (r < 0)
1361 return r;
1362
1363 r = manager_connect_rtnl(m);
1364 if (r < 0)
1365 return r;
1366
1367 r = manager_connect_genl(m);
1368 if (r < 0)
1369 return r;
1370
1371 r = manager_connect_udev(m);
1372 if (r < 0)
1373 return r;
1374
1375 m->netdevs = hashmap_new(&string_hash_ops);
1376 if (!m->netdevs)
1377 return -ENOMEM;
1378
1379 LIST_HEAD_INIT(m->networks);
1380
1381 r = sd_resolve_default(&m->resolve);
1382 if (r < 0)
1383 return r;
1384
1385 r = sd_resolve_attach_event(m->resolve, m->event, 0);
1386 if (r < 0)
1387 return r;
1388
1389 r = setup_default_address_pool(m);
1390 if (r < 0)
1391 return r;
1392
1393 m->dhcp6_prefixes = hashmap_new(&dhcp6_prefixes_hash_ops);
1394 if (!m->dhcp6_prefixes)
1395 return -ENOMEM;
1396
1397 m->duid.type = DUID_TYPE_EN;
1398
1399 (void) routing_policy_load_rules(m->state_file, &m->rules_saved);
1400
1401 *ret = TAKE_PTR(m);
1402
1403 return 0;
1404 }
1405
1406 void manager_free(Manager *m) {
1407 AddressPool *pool;
1408 Network *network;
1409 Link *link;
1410
1411 if (!m)
1412 return;
1413
1414 free(m->state_file);
1415
1416 sd_netlink_unref(m->rtnl);
1417 sd_netlink_unref(m->genl);
1418 sd_resolve_unref(m->resolve);
1419
1420 while ((network = m->networks))
1421 network_free(network);
1422
1423 while ((link = hashmap_first(m->dhcp6_prefixes)))
1424 manager_dhcp6_prefix_remove_all(m, link);
1425 hashmap_free(m->dhcp6_prefixes);
1426
1427 while ((link = hashmap_first(m->links))) {
1428 if (link->dhcp6_client)
1429 (void) dhcp6_lease_pd_prefix_lost(link->dhcp6_client,
1430 link);
1431
1432 hashmap_remove(m->links, INT_TO_PTR(link->ifindex));
1433
1434 link_unref(link);
1435 }
1436
1437 m->dirty_links = set_free_with_destructor(m->dirty_links, link_unref);
1438 m->links = hashmap_free(m->links);
1439 m->links_requesting_uuid = set_free(m->links_requesting_uuid);
1440 set_free(m->duids_requesting_uuid);
1441
1442 hashmap_free(m->networks_by_name);
1443
1444 m->netdevs = hashmap_free_with_destructor(m->netdevs, netdev_unref);
1445
1446 while ((pool = m->address_pools))
1447 address_pool_free(pool);
1448
1449 /* routing_policy_rule_free() access m->rules and m->rules_foreign.
1450 * So, it is necessary to set NULL after the sets are freed. */
1451 m->rules = set_free_with_destructor(m->rules, routing_policy_rule_free);
1452 m->rules_foreign = set_free_with_destructor(m->rules_foreign, routing_policy_rule_free);
1453 set_free_with_destructor(m->rules_saved, routing_policy_rule_free);
1454
1455 sd_event_unref(m->event);
1456
1457 sd_device_monitor_unref(m->device_monitor);
1458
1459 sd_bus_unref(m->bus);
1460
1461 free(m->dynamic_timezone);
1462 free(m->dynamic_hostname);
1463
1464 free(m);
1465 }
1466
1467 int manager_start(Manager *m) {
1468 Link *link;
1469 Iterator i;
1470
1471 assert(m);
1472
1473 /* The dirty handler will deal with future serialization, but the first one
1474 must be done explicitly. */
1475
1476 manager_save(m);
1477
1478 HASHMAP_FOREACH(link, m->links, i)
1479 link_save(link);
1480
1481 return 0;
1482 }
1483
1484 int manager_load_config(Manager *m) {
1485 int r;
1486
1487 /* update timestamp */
1488 paths_check_timestamp(network_dirs, &m->network_dirs_ts_usec, true);
1489
1490 r = netdev_load(m);
1491 if (r < 0)
1492 return r;
1493
1494 r = network_load(m);
1495 if (r < 0)
1496 return r;
1497
1498 return 0;
1499 }
1500
1501 bool manager_should_reload(Manager *m) {
1502 return paths_check_timestamp(network_dirs, &m->network_dirs_ts_usec, false);
1503 }
1504
1505 int manager_rtnl_enumerate_links(Manager *m) {
1506 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
1507 sd_netlink_message *link;
1508 int r;
1509
1510 assert(m);
1511 assert(m->rtnl);
1512
1513 r = sd_rtnl_message_new_link(m->rtnl, &req, RTM_GETLINK, 0);
1514 if (r < 0)
1515 return r;
1516
1517 r = sd_netlink_message_request_dump(req, true);
1518 if (r < 0)
1519 return r;
1520
1521 r = sd_netlink_call(m->rtnl, req, 0, &reply);
1522 if (r < 0)
1523 return r;
1524
1525 for (link = reply; link; link = sd_netlink_message_next(link)) {
1526 int k;
1527
1528 m->enumerating = true;
1529
1530 k = manager_rtnl_process_link(m->rtnl, link, m);
1531 if (k < 0)
1532 r = k;
1533
1534 m->enumerating = false;
1535 }
1536
1537 return r;
1538 }
1539
1540 int manager_rtnl_enumerate_addresses(Manager *m) {
1541 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
1542 sd_netlink_message *addr;
1543 int r;
1544
1545 assert(m);
1546 assert(m->rtnl);
1547
1548 r = sd_rtnl_message_new_addr(m->rtnl, &req, RTM_GETADDR, 0, 0);
1549 if (r < 0)
1550 return r;
1551
1552 r = sd_netlink_message_request_dump(req, true);
1553 if (r < 0)
1554 return r;
1555
1556 r = sd_netlink_call(m->rtnl, req, 0, &reply);
1557 if (r < 0)
1558 return r;
1559
1560 for (addr = reply; addr; addr = sd_netlink_message_next(addr)) {
1561 int k;
1562
1563 m->enumerating = true;
1564
1565 k = manager_rtnl_process_address(m->rtnl, addr, m);
1566 if (k < 0)
1567 r = k;
1568
1569 m->enumerating = false;
1570 }
1571
1572 return r;
1573 }
1574
1575 int manager_rtnl_enumerate_routes(Manager *m) {
1576 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
1577 sd_netlink_message *route;
1578 int r;
1579
1580 assert(m);
1581 assert(m->rtnl);
1582
1583 r = sd_rtnl_message_new_route(m->rtnl, &req, RTM_GETROUTE, 0, 0);
1584 if (r < 0)
1585 return r;
1586
1587 r = sd_netlink_message_request_dump(req, true);
1588 if (r < 0)
1589 return r;
1590
1591 r = sd_netlink_call(m->rtnl, req, 0, &reply);
1592 if (r < 0)
1593 return r;
1594
1595 for (route = reply; route; route = sd_netlink_message_next(route)) {
1596 int k;
1597
1598 m->enumerating = true;
1599
1600 k = manager_rtnl_process_route(m->rtnl, route, m);
1601 if (k < 0)
1602 r = k;
1603
1604 m->enumerating = false;
1605 }
1606
1607 return r;
1608 }
1609
1610 int manager_rtnl_enumerate_rules(Manager *m) {
1611 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
1612 sd_netlink_message *rule;
1613 int r;
1614
1615 assert(m);
1616 assert(m->rtnl);
1617
1618 r = sd_rtnl_message_new_routing_policy_rule(m->rtnl, &req, RTM_GETRULE, 0);
1619 if (r < 0)
1620 return r;
1621
1622 r = sd_netlink_message_request_dump(req, true);
1623 if (r < 0)
1624 return r;
1625
1626 r = sd_netlink_call(m->rtnl, req, 0, &reply);
1627 if (r < 0) {
1628 if (r == -EOPNOTSUPP) {
1629 log_debug("FIB Rules are not supported by the kernel. Ignoring.");
1630 return 0;
1631 }
1632
1633 return r;
1634 }
1635
1636 for (rule = reply; rule; rule = sd_netlink_message_next(rule)) {
1637 int k;
1638
1639 m->enumerating = true;
1640
1641 k = manager_rtnl_process_rule(m->rtnl, rule, m);
1642 if (k < 0)
1643 r = k;
1644
1645 m->enumerating = false;
1646 }
1647
1648 return r;
1649 }
1650
1651 int manager_address_pool_acquire(Manager *m, int family, unsigned prefixlen, union in_addr_union *found) {
1652 AddressPool *p;
1653 int r;
1654
1655 assert(m);
1656 assert(prefixlen > 0);
1657 assert(found);
1658
1659 LIST_FOREACH(address_pools, p, m->address_pools) {
1660 if (p->family != family)
1661 continue;
1662
1663 r = address_pool_acquire(p, prefixlen, found);
1664 if (r != 0)
1665 return r;
1666 }
1667
1668 return 0;
1669 }
1670
1671 Link* manager_find_uplink(Manager *m, Link *exclude) {
1672 _cleanup_free_ struct local_address *gateways = NULL;
1673 int n, i;
1674
1675 assert(m);
1676
1677 /* Looks for a suitable "uplink", via black magic: an
1678 * interface that is up and where the default route with the
1679 * highest priority points to. */
1680
1681 n = local_gateways(m->rtnl, 0, AF_UNSPEC, &gateways);
1682 if (n < 0) {
1683 log_warning_errno(n, "Failed to determine list of default gateways: %m");
1684 return NULL;
1685 }
1686
1687 for (i = 0; i < n; i++) {
1688 Link *link;
1689
1690 link = hashmap_get(m->links, INT_TO_PTR(gateways[i].ifindex));
1691 if (!link) {
1692 log_debug("Weird, found a gateway for a link we don't know. Ignoring.");
1693 continue;
1694 }
1695
1696 if (link == exclude)
1697 continue;
1698
1699 if (link->operstate < LINK_OPERSTATE_ROUTABLE)
1700 continue;
1701
1702 return link;
1703 }
1704
1705 return NULL;
1706 }
1707
1708 void manager_dirty(Manager *manager) {
1709 assert(manager);
1710
1711 /* the serialized state in /run is no longer up-to-date */
1712 manager->dirty = true;
1713 }
1714
1715 static int set_hostname_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
1716 Manager *manager = userdata;
1717 const sd_bus_error *e;
1718
1719 assert(m);
1720 assert(manager);
1721
1722 e = sd_bus_message_get_error(m);
1723 if (e)
1724 log_warning_errno(sd_bus_error_get_errno(e), "Could not set hostname: %s", e->message);
1725
1726 return 1;
1727 }
1728
1729 int manager_set_hostname(Manager *m, const char *hostname) {
1730 int r;
1731
1732 log_debug("Setting transient hostname: '%s'", strna(hostname));
1733
1734 if (free_and_strdup(&m->dynamic_hostname, hostname) < 0)
1735 return log_oom();
1736
1737 if (!m->bus || sd_bus_is_ready(m->bus) <= 0) {
1738 log_debug("Not connected to system bus, setting hostname later.");
1739 return 0;
1740 }
1741
1742 r = sd_bus_call_method_async(
1743 m->bus,
1744 NULL,
1745 "org.freedesktop.hostname1",
1746 "/org/freedesktop/hostname1",
1747 "org.freedesktop.hostname1",
1748 "SetHostname",
1749 set_hostname_handler,
1750 m,
1751 "sb",
1752 hostname,
1753 false);
1754
1755 if (r < 0)
1756 return log_error_errno(r, "Could not set transient hostname: %m");
1757
1758 return 0;
1759 }
1760
1761 static int set_timezone_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
1762 Manager *manager = userdata;
1763 const sd_bus_error *e;
1764
1765 assert(m);
1766 assert(manager);
1767
1768 e = sd_bus_message_get_error(m);
1769 if (e)
1770 log_warning_errno(sd_bus_error_get_errno(e), "Could not set timezone: %s", e->message);
1771
1772 return 1;
1773 }
1774
1775 int manager_set_timezone(Manager *m, const char *tz) {
1776 int r;
1777
1778 assert(m);
1779 assert(tz);
1780
1781 log_debug("Setting system timezone: '%s'", tz);
1782 if (free_and_strdup(&m->dynamic_timezone, tz) < 0)
1783 return log_oom();
1784
1785 if (!m->bus || sd_bus_is_ready(m->bus) <= 0) {
1786 log_debug("Not connected to system bus, setting timezone later.");
1787 return 0;
1788 }
1789
1790 r = sd_bus_call_method_async(
1791 m->bus,
1792 NULL,
1793 "org.freedesktop.timedate1",
1794 "/org/freedesktop/timedate1",
1795 "org.freedesktop.timedate1",
1796 "SetTimezone",
1797 set_timezone_handler,
1798 m,
1799 "sb",
1800 tz,
1801 false);
1802 if (r < 0)
1803 return log_error_errno(r, "Could not set timezone: %m");
1804
1805 return 0;
1806 }
1807
1808 int manager_request_product_uuid(Manager *m, Link *link) {
1809 int r;
1810
1811 assert(m);
1812
1813 if (m->has_product_uuid)
1814 return 0;
1815
1816 log_debug("Requesting product UUID");
1817
1818 if (link) {
1819 DUID *duid;
1820
1821 assert_se(duid = link_get_duid(link));
1822
1823 r = set_ensure_allocated(&m->links_requesting_uuid, NULL);
1824 if (r < 0)
1825 return log_oom();
1826
1827 r = set_ensure_allocated(&m->duids_requesting_uuid, NULL);
1828 if (r < 0)
1829 return log_oom();
1830
1831 r = set_put(m->links_requesting_uuid, link);
1832 if (r < 0)
1833 return log_oom();
1834
1835 r = set_put(m->duids_requesting_uuid, duid);
1836 if (r < 0)
1837 return log_oom();
1838 }
1839
1840 if (!m->bus || sd_bus_is_ready(m->bus) <= 0) {
1841 log_debug("Not connected to system bus, requesting product UUID later.");
1842 return 0;
1843 }
1844
1845 r = sd_bus_call_method_async(
1846 m->bus,
1847 NULL,
1848 "org.freedesktop.hostname1",
1849 "/org/freedesktop/hostname1",
1850 "org.freedesktop.hostname1",
1851 "GetProductUUID",
1852 get_product_uuid_handler,
1853 m,
1854 "b",
1855 false);
1856 if (r < 0)
1857 return log_warning_errno(r, "Failed to get product UUID: %m");
1858
1859 return 0;
1860 }
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