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[thirdparty/systemd.git] / src / network / networkd-manager.c
1 /* SPDX-License-Identifier: LGPL-2.1+ */
2
3 #include <netinet/in.h>
4 #include <sys/socket.h>
5 #include <unistd.h>
6 #include <linux/if.h>
7 #include <linux/fib_rules.h>
8
9 #include "sd-daemon.h"
10 #include "sd-netlink.h"
11
12 #include "alloc-util.h"
13 #include "bus-util.h"
14 #include "conf-parser.h"
15 #include "def.h"
16 #include "device-private.h"
17 #include "device-util.h"
18 #include "dns-domain.h"
19 #include "fd-util.h"
20 #include "fileio.h"
21 #include "local-addresses.h"
22 #include "netlink-util.h"
23 #include "network-internal.h"
24 #include "networkd-dhcp6.h"
25 #include "networkd-link-bus.h"
26 #include "networkd-manager-bus.h"
27 #include "networkd-manager.h"
28 #include "networkd-network-bus.h"
29 #include "networkd-speed-meter.h"
30 #include "ordered-set.h"
31 #include "path-util.h"
32 #include "set.h"
33 #include "strv.h"
34 #include "sysctl-util.h"
35 #include "tmpfile-util.h"
36 #include "udev-util.h"
37 #include "virt.h"
38
39 /* use 8 MB for receive socket kernel queue. */
40 #define RCVBUF_SIZE (8*1024*1024)
41
42 static int setup_default_address_pool(Manager *m) {
43 AddressPool *p;
44 int r;
45
46 assert(m);
47
48 /* Add in the well-known private address ranges. */
49
50 r = address_pool_new_from_string(m, &p, AF_INET6, "fd00::", 8);
51 if (r < 0)
52 return r;
53
54 r = address_pool_new_from_string(m, &p, AF_INET, "10.0.0.0", 8);
55 if (r < 0)
56 return r;
57
58 r = address_pool_new_from_string(m, &p, AF_INET, "172.16.0.0", 12);
59 if (r < 0)
60 return r;
61
62 r = address_pool_new_from_string(m, &p, AF_INET, "192.168.0.0", 16);
63 if (r < 0)
64 return r;
65
66 return 0;
67 }
68
69 static int manager_reset_all(Manager *m) {
70 Link *link;
71 Iterator i;
72 int r;
73
74 assert(m);
75
76 HASHMAP_FOREACH(link, m->links, i) {
77 r = link_carrier_reset(link);
78 if (r < 0)
79 log_link_warning_errno(link, r, "Could not reset carrier: %m");
80 }
81
82 return 0;
83 }
84
85 static int match_prepare_for_sleep(sd_bus_message *message, void *userdata, sd_bus_error *ret_error) {
86 Manager *m = userdata;
87 int b, r;
88
89 assert(message);
90 assert(m);
91
92 r = sd_bus_message_read(message, "b", &b);
93 if (r < 0) {
94 log_debug_errno(r, "Failed to parse PrepareForSleep signal: %m");
95 return 0;
96 }
97
98 if (b)
99 return 0;
100
101 log_debug("Coming back from suspend, resetting all connections...");
102
103 (void) manager_reset_all(m);
104
105 return 0;
106 }
107
108 static int on_connected(sd_bus_message *message, void *userdata, sd_bus_error *ret_error) {
109 Manager *m = userdata;
110
111 assert(message);
112 assert(m);
113
114 /* Did we get a timezone or transient hostname from DHCP while D-Bus wasn't up yet? */
115 if (m->dynamic_hostname)
116 (void) manager_set_hostname(m, m->dynamic_hostname);
117 if (m->dynamic_timezone)
118 (void) manager_set_timezone(m, m->dynamic_timezone);
119 if (m->links_requesting_uuid)
120 (void) manager_request_product_uuid(m, NULL);
121
122 return 0;
123 }
124
125 int manager_connect_bus(Manager *m) {
126 int r;
127
128 assert(m);
129
130 if (m->bus)
131 return 0;
132
133 r = bus_open_system_watch_bind_with_description(&m->bus, "bus-api-network");
134 if (r < 0)
135 return log_error_errno(r, "Failed to connect to bus: %m");
136
137 r = sd_bus_add_object_vtable(m->bus, NULL, "/org/freedesktop/network1", "org.freedesktop.network1.Manager", manager_vtable, m);
138 if (r < 0)
139 return log_error_errno(r, "Failed to add manager object vtable: %m");
140
141 r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/network1/link", "org.freedesktop.network1.Link", link_vtable, link_object_find, m);
142 if (r < 0)
143 return log_error_errno(r, "Failed to add link object vtable: %m");
144
145 r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/network1/link", link_node_enumerator, m);
146 if (r < 0)
147 return log_error_errno(r, "Failed to add link enumerator: %m");
148
149 r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/network1/network", "org.freedesktop.network1.Network", network_vtable, network_object_find, m);
150 if (r < 0)
151 return log_error_errno(r, "Failed to add network object vtable: %m");
152
153 r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/network1/network", network_node_enumerator, m);
154 if (r < 0)
155 return log_error_errno(r, "Failed to add network enumerator: %m");
156
157 r = sd_bus_request_name_async(m->bus, NULL, "org.freedesktop.network1", 0, NULL, NULL);
158 if (r < 0)
159 return log_error_errno(r, "Failed to request name: %m");
160
161 r = sd_bus_attach_event(m->bus, m->event, 0);
162 if (r < 0)
163 return log_error_errno(r, "Failed to attach bus to event loop: %m");
164
165 r = sd_bus_match_signal_async(
166 m->bus,
167 NULL,
168 "org.freedesktop.DBus.Local",
169 NULL,
170 "org.freedesktop.DBus.Local",
171 "Connected",
172 on_connected, NULL, m);
173 if (r < 0)
174 return log_error_errno(r, "Failed to request match on Connected signal: %m");
175
176 r = sd_bus_match_signal_async(
177 m->bus,
178 NULL,
179 "org.freedesktop.login1",
180 "/org/freedesktop/login1",
181 "org.freedesktop.login1.Manager",
182 "PrepareForSleep",
183 match_prepare_for_sleep, NULL, m);
184 if (r < 0)
185 log_warning_errno(r, "Failed to request match for PrepareForSleep, ignoring: %m");
186
187 return 0;
188 }
189
190 static int manager_udev_process_link(sd_device_monitor *monitor, sd_device *device, void *userdata) {
191 Manager *m = userdata;
192 DeviceAction action;
193 Link *link = NULL;
194 int r, ifindex;
195
196 assert(m);
197 assert(device);
198
199 r = device_get_action(device, &action);
200 if (r < 0) {
201 log_device_debug_errno(device, r, "Failed to get udev action, ignoring device: %m");
202 return 0;
203 }
204
205 if (!IN_SET(action, DEVICE_ACTION_ADD, DEVICE_ACTION_CHANGE, DEVICE_ACTION_MOVE)) {
206 log_device_debug(device, "Ignoring udev %s event for device.", device_action_to_string(action));
207 return 0;
208 }
209
210 r = sd_device_get_ifindex(device, &ifindex);
211 if (r < 0) {
212 log_device_debug_errno(device, r, "Ignoring udev ADD event for device without ifindex or with invalid ifindex: %m");
213 return 0;
214 }
215
216 r = device_is_renaming(device);
217 if (r < 0) {
218 log_device_error_errno(device, r, "Failed to determine the device is renamed or not, ignoring '%s' uevent: %m",
219 device_action_to_string(action));
220 return 0;
221 }
222 if (r > 0) {
223 log_device_debug(device, "Interface is under renaming, wait for the interface to be renamed: %m");
224 return 0;
225 }
226
227 r = link_get(m, ifindex, &link);
228 if (r < 0) {
229 if (r != -ENODEV)
230 log_debug_errno(r, "Failed to get link from ifindex %i, ignoring: %m", ifindex);
231 return 0;
232 }
233
234 (void) link_initialized(link, device);
235
236 return 0;
237 }
238
239 static int manager_connect_udev(Manager *m) {
240 int r;
241
242 /* udev does not initialize devices inside containers,
243 * so we rely on them being already initialized before
244 * entering the container */
245 if (detect_container() > 0)
246 return 0;
247
248 r = sd_device_monitor_new(&m->device_monitor);
249 if (r < 0)
250 return log_error_errno(r, "Failed to initialize device monitor: %m");
251
252 r = sd_device_monitor_filter_add_match_subsystem_devtype(m->device_monitor, "net", NULL);
253 if (r < 0)
254 return log_error_errno(r, "Could not add device monitor filter: %m");
255
256 r = sd_device_monitor_attach_event(m->device_monitor, m->event);
257 if (r < 0)
258 return log_error_errno(r, "Failed to attach event to device monitor: %m");
259
260 r = sd_device_monitor_start(m->device_monitor, manager_udev_process_link, m);
261 if (r < 0)
262 return log_error_errno(r, "Failed to start device monitor: %m");
263
264 return 0;
265 }
266
267 int manager_rtnl_process_route(sd_netlink *rtnl, sd_netlink_message *message, void *userdata) {
268 Manager *m = userdata;
269 Link *link = NULL;
270 uint16_t type;
271 uint32_t ifindex, priority = 0;
272 unsigned char protocol, scope, tos, table, rt_type;
273 int family;
274 unsigned char dst_prefixlen, src_prefixlen;
275 union in_addr_union dst = IN_ADDR_NULL, gw = IN_ADDR_NULL, src = IN_ADDR_NULL, prefsrc = IN_ADDR_NULL;
276 Route *route = NULL;
277 int r;
278
279 assert(rtnl);
280 assert(message);
281 assert(m);
282
283 if (sd_netlink_message_is_error(message)) {
284 r = sd_netlink_message_get_errno(message);
285 if (r < 0)
286 log_warning_errno(r, "rtnl: failed to receive route message, ignoring: %m");
287
288 return 0;
289 }
290
291 r = sd_netlink_message_get_type(message, &type);
292 if (r < 0) {
293 log_warning_errno(r, "rtnl: could not get message type, ignoring: %m");
294 return 0;
295 } else if (!IN_SET(type, RTM_NEWROUTE, RTM_DELROUTE)) {
296 log_warning("rtnl: received unexpected message type %u when processing route, ignoring.", type);
297 return 0;
298 }
299
300 r = sd_netlink_message_read_u32(message, RTA_OIF, &ifindex);
301 if (r == -ENODATA) {
302 log_debug("rtnl: received route message without ifindex, ignoring");
303 return 0;
304 } else if (r < 0) {
305 log_warning_errno(r, "rtnl: could not get ifindex from route message, ignoring: %m");
306 return 0;
307 } else if (ifindex <= 0) {
308 log_warning("rtnl: received route message with invalid ifindex %d, ignoring.", ifindex);
309 return 0;
310 }
311
312 r = link_get(m, ifindex, &link);
313 if (r < 0 || !link) {
314 /* when enumerating we might be out of sync, but we will
315 * get the route again, so just ignore it */
316 if (!m->enumerating)
317 log_warning("rtnl: received route message for link (%d) we do not know about, ignoring", ifindex);
318 return 0;
319 }
320
321 r = sd_rtnl_message_route_get_family(message, &family);
322 if (r < 0 || !IN_SET(family, AF_INET, AF_INET6)) {
323 log_link_warning(link, "rtnl: received route message with invalid family, ignoring");
324 return 0;
325 }
326
327 r = sd_rtnl_message_route_get_protocol(message, &protocol);
328 if (r < 0) {
329 log_warning_errno(r, "rtnl: received route message with invalid route protocol: %m");
330 return 0;
331 }
332
333 switch (family) {
334 case AF_INET:
335 r = sd_netlink_message_read_in_addr(message, RTA_DST, &dst.in);
336 if (r < 0 && r != -ENODATA) {
337 log_link_warning_errno(link, r, "rtnl: received route message without valid destination, ignoring: %m");
338 return 0;
339 }
340
341 r = sd_netlink_message_read_in_addr(message, RTA_GATEWAY, &gw.in);
342 if (r < 0 && r != -ENODATA) {
343 log_link_warning_errno(link, r, "rtnl: received route message without valid gateway, ignoring: %m");
344 return 0;
345 }
346
347 r = sd_netlink_message_read_in_addr(message, RTA_SRC, &src.in);
348 if (r < 0 && r != -ENODATA) {
349 log_link_warning_errno(link, r, "rtnl: received route message without valid source, ignoring: %m");
350 return 0;
351 }
352
353 r = sd_netlink_message_read_in_addr(message, RTA_PREFSRC, &prefsrc.in);
354 if (r < 0 && r != -ENODATA) {
355 log_link_warning_errno(link, r, "rtnl: received route message without valid preferred source, ignoring: %m");
356 return 0;
357 }
358
359 break;
360
361 case AF_INET6:
362 r = sd_netlink_message_read_in6_addr(message, RTA_DST, &dst.in6);
363 if (r < 0 && r != -ENODATA) {
364 log_link_warning_errno(link, r, "rtnl: received route message without valid destination, ignoring: %m");
365 return 0;
366 }
367
368 r = sd_netlink_message_read_in6_addr(message, RTA_GATEWAY, &gw.in6);
369 if (r < 0 && r != -ENODATA) {
370 log_link_warning_errno(link, r, "rtnl: received route message without valid gateway, ignoring: %m");
371 return 0;
372 }
373
374 r = sd_netlink_message_read_in6_addr(message, RTA_SRC, &src.in6);
375 if (r < 0 && r != -ENODATA) {
376 log_link_warning_errno(link, r, "rtnl: received route message without valid source, ignoring: %m");
377 return 0;
378 }
379
380 r = sd_netlink_message_read_in6_addr(message, RTA_PREFSRC, &prefsrc.in6);
381 if (r < 0 && r != -ENODATA) {
382 log_link_warning_errno(link, r, "rtnl: received route message without valid preferred source, ignoring: %m");
383 return 0;
384 }
385
386 break;
387
388 default:
389 assert_not_reached("Received route message with unsupported address family");
390 return 0;
391 }
392
393 r = sd_rtnl_message_route_get_dst_prefixlen(message, &dst_prefixlen);
394 if (r < 0) {
395 log_link_warning_errno(link, r, "rtnl: received route message with invalid destination prefixlen, ignoring: %m");
396 return 0;
397 }
398
399 r = sd_rtnl_message_route_get_src_prefixlen(message, &src_prefixlen);
400 if (r < 0) {
401 log_link_warning_errno(link, r, "rtnl: received route message with invalid source prefixlen, ignoring: %m");
402 return 0;
403 }
404
405 r = sd_rtnl_message_route_get_scope(message, &scope);
406 if (r < 0) {
407 log_link_warning_errno(link, r, "rtnl: received route message with invalid scope, ignoring: %m");
408 return 0;
409 }
410
411 r = sd_rtnl_message_route_get_tos(message, &tos);
412 if (r < 0) {
413 log_link_warning_errno(link, r, "rtnl: received route message with invalid tos, ignoring: %m");
414 return 0;
415 }
416
417 r = sd_rtnl_message_route_get_type(message, &rt_type);
418 if (r < 0) {
419 log_link_warning_errno(link, r, "rtnl: received route message with invalid type, ignoring: %m");
420 return 0;
421 }
422
423 r = sd_rtnl_message_route_get_table(message, &table);
424 if (r < 0) {
425 log_link_warning_errno(link, r, "rtnl: received route message with invalid table, ignoring: %m");
426 return 0;
427 }
428
429 r = sd_netlink_message_read_u32(message, RTA_PRIORITY, &priority);
430 if (r < 0 && r != -ENODATA) {
431 log_link_warning_errno(link, r, "rtnl: received route message with invalid priority, ignoring: %m");
432 return 0;
433 }
434
435 (void) route_get(link, family, &dst, dst_prefixlen, &gw, tos, priority, table, &route);
436
437 if (DEBUG_LOGGING) {
438 _cleanup_free_ char *buf_dst = NULL, *buf_dst_prefixlen = NULL,
439 *buf_src = NULL, *buf_gw = NULL, *buf_prefsrc = NULL;
440 char buf_scope[ROUTE_SCOPE_STR_MAX], buf_table[ROUTE_TABLE_STR_MAX],
441 buf_protocol[ROUTE_PROTOCOL_STR_MAX];
442
443 if (!in_addr_is_null(family, &dst)) {
444 (void) in_addr_to_string(family, &dst, &buf_dst);
445 (void) asprintf(&buf_dst_prefixlen, "/%u", dst_prefixlen);
446 }
447 if (!in_addr_is_null(family, &src))
448 (void) in_addr_to_string(family, &src, &buf_src);
449 if (!in_addr_is_null(family, &gw))
450 (void) in_addr_to_string(family, &gw, &buf_gw);
451 if (!in_addr_is_null(family, &prefsrc))
452 (void) in_addr_to_string(family, &prefsrc, &buf_prefsrc);
453
454 log_link_debug(link,
455 "%s route: dst: %s%s, src: %s, gw: %s, prefsrc: %s, scope: %s, table: %s, proto: %s, type: %s",
456 type == RTM_DELROUTE ? "Forgetting" : route ? "Updating remembered" : "Remembering",
457 strna(buf_dst), strempty(buf_dst_prefixlen),
458 strna(buf_src), strna(buf_gw), strna(buf_prefsrc),
459 format_route_scope(scope, buf_scope, sizeof buf_scope),
460 format_route_table(table, buf_table, sizeof buf_table),
461 format_route_protocol(protocol, buf_protocol, sizeof buf_protocol),
462 strna(route_type_to_string(rt_type)));
463 }
464
465 switch (type) {
466 case RTM_NEWROUTE:
467 if (!route) {
468 /* A route appeared that we did not request */
469 r = route_add_foreign(link, family, &dst, dst_prefixlen, &gw, tos, priority, table, &route);
470 if (r < 0) {
471 log_link_warning_errno(link, r, "Failed to remember foreign route, ignoring: %m");
472 return 0;
473 }
474 }
475
476 route_update(route, &src, src_prefixlen, &gw, &prefsrc, scope, protocol, rt_type);
477
478 break;
479
480 case RTM_DELROUTE:
481 route_free(route);
482 break;
483
484 default:
485 assert_not_reached("Received route message with invalid RTNL message type");
486 }
487
488 return 1;
489 }
490
491 int manager_rtnl_process_address(sd_netlink *rtnl, sd_netlink_message *message, void *userdata) {
492 _cleanup_free_ char *buf = NULL;
493 Manager *m = userdata;
494 Link *link = NULL;
495 uint16_t type;
496 unsigned char flags, prefixlen, scope;
497 union in_addr_union in_addr = IN_ADDR_NULL;
498 struct ifa_cacheinfo cinfo;
499 Address *address = NULL;
500 char valid_buf[FORMAT_TIMESPAN_MAX];
501 const char *valid_str = NULL;
502 int ifindex, family, r;
503
504 assert(rtnl);
505 assert(message);
506 assert(m);
507
508 if (sd_netlink_message_is_error(message)) {
509 r = sd_netlink_message_get_errno(message);
510 if (r < 0)
511 log_warning_errno(r, "rtnl: failed to receive address message, ignoring: %m");
512
513 return 0;
514 }
515
516 r = sd_netlink_message_get_type(message, &type);
517 if (r < 0) {
518 log_warning_errno(r, "rtnl: could not get message type, ignoring: %m");
519 return 0;
520 } else if (!IN_SET(type, RTM_NEWADDR, RTM_DELADDR)) {
521 log_warning("rtnl: received unexpected message type %u when processing address, ignoring.", type);
522 return 0;
523 }
524
525 r = sd_rtnl_message_addr_get_ifindex(message, &ifindex);
526 if (r < 0) {
527 log_warning_errno(r, "rtnl: could not get ifindex from message, ignoring: %m");
528 return 0;
529 } else if (ifindex <= 0) {
530 log_warning("rtnl: received address message with invalid ifindex %d, ignoring.", ifindex);
531 return 0;
532 }
533
534 r = link_get(m, ifindex, &link);
535 if (r < 0 || !link) {
536 /* when enumerating we might be out of sync, but we will get the address again, so just
537 * ignore it */
538 if (!m->enumerating)
539 log_warning("rtnl: received address for link '%d' we don't know about, ignoring.", ifindex);
540 return 0;
541 }
542
543 r = sd_rtnl_message_addr_get_family(message, &family);
544 if (r < 0 || !IN_SET(family, AF_INET, AF_INET6)) {
545 log_link_warning(link, "rtnl: received address message with invalid family, ignoring.");
546 return 0;
547 }
548
549 r = sd_rtnl_message_addr_get_prefixlen(message, &prefixlen);
550 if (r < 0) {
551 log_link_warning_errno(link, r, "rtnl: received address message with invalid prefixlen, ignoring: %m");
552 return 0;
553 }
554
555 r = sd_rtnl_message_addr_get_scope(message, &scope);
556 if (r < 0) {
557 log_link_warning_errno(link, r, "rtnl: received address message with invalid scope, ignoring: %m");
558 return 0;
559 }
560
561 r = sd_rtnl_message_addr_get_flags(message, &flags);
562 if (r < 0) {
563 log_link_warning_errno(link, r, "rtnl: received address message with invalid flags, ignoring: %m");
564 return 0;
565 }
566
567 switch (family) {
568 case AF_INET:
569 r = sd_netlink_message_read_in_addr(message, IFA_LOCAL, &in_addr.in);
570 if (r < 0) {
571 log_link_warning_errno(link, r, "rtnl: received address message without valid address, ignoring: %m");
572 return 0;
573 }
574
575 break;
576
577 case AF_INET6:
578 r = sd_netlink_message_read_in6_addr(message, IFA_ADDRESS, &in_addr.in6);
579 if (r < 0) {
580 log_link_warning_errno(link, r, "rtnl: received address message without valid address, ignoring: %m");
581 return 0;
582 }
583
584 break;
585
586 default:
587 assert_not_reached("Received unsupported address family");
588 }
589
590 r = in_addr_to_string(family, &in_addr, &buf);
591 if (r < 0)
592 log_link_warning_errno(link, r, "Could not print address: %m");
593
594 r = sd_netlink_message_read_cache_info(message, IFA_CACHEINFO, &cinfo);
595 if (r < 0 && r != -ENODATA) {
596 log_link_warning_errno(link, r, "rtnl: cannot get IFA_CACHEINFO attribute, ignoring: %m");
597 return 0;
598 } else if (r >= 0 && cinfo.ifa_valid != CACHE_INFO_INFINITY_LIFE_TIME)
599 valid_str = format_timespan(valid_buf, FORMAT_TIMESPAN_MAX,
600 cinfo.ifa_valid * USEC_PER_SEC,
601 USEC_PER_SEC);
602
603 (void) address_get(link, family, &in_addr, prefixlen, &address);
604
605 switch (type) {
606 case RTM_NEWADDR:
607 if (address)
608 log_link_debug(link, "Remembering updated address: %s/%u (valid %s%s)",
609 strnull(buf), prefixlen,
610 valid_str ? "for " : "forever", strempty(valid_str));
611 else {
612 /* An address appeared that we did not request */
613 r = address_add_foreign(link, family, &in_addr, prefixlen, &address);
614 if (r < 0) {
615 log_link_warning_errno(link, r, "Failed to remember foreign address %s/%u, ignoring: %m",
616 strnull(buf), prefixlen);
617 return 0;
618 } else
619 log_link_debug(link, "Remembering foreign address: %s/%u (valid %s%s)",
620 strnull(buf), prefixlen,
621 valid_str ? "for " : "forever", strempty(valid_str));
622 }
623
624 /* address_update() logs internally, so we don't need to. */
625 (void) address_update(address, flags, scope, &cinfo);
626
627 break;
628
629 case RTM_DELADDR:
630 if (address) {
631 log_link_debug(link, "Forgetting address: %s/%u (valid %s%s)",
632 strnull(buf), prefixlen,
633 valid_str ? "for " : "forever", strempty(valid_str));
634 (void) address_drop(address);
635 } else
636 log_link_info(link, "Kernel removed an address we don't remember: %s/%u (valid %s%s), ignoring.",
637 strnull(buf), prefixlen,
638 valid_str ? "for " : "forever", strempty(valid_str));
639
640 break;
641
642 default:
643 assert_not_reached("Received invalid RTNL message type");
644 }
645
646 return 1;
647 }
648
649 static int manager_rtnl_process_link(sd_netlink *rtnl, sd_netlink_message *message, void *userdata) {
650 Manager *m = userdata;
651 Link *link = NULL;
652 NetDev *netdev = NULL;
653 uint16_t type;
654 const char *name;
655 int r, ifindex;
656
657 assert(rtnl);
658 assert(message);
659 assert(m);
660
661 if (sd_netlink_message_is_error(message)) {
662 r = sd_netlink_message_get_errno(message);
663 if (r < 0)
664 log_warning_errno(r, "rtnl: Could not receive link message, ignoring: %m");
665
666 return 0;
667 }
668
669 r = sd_netlink_message_get_type(message, &type);
670 if (r < 0) {
671 log_warning_errno(r, "rtnl: Could not get message type, ignoring: %m");
672 return 0;
673 } else if (!IN_SET(type, RTM_NEWLINK, RTM_DELLINK)) {
674 log_warning("rtnl: Received unexpected message type %u when processing link, ignoring.", type);
675 return 0;
676 }
677
678 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
679 if (r < 0) {
680 log_warning_errno(r, "rtnl: Could not get ifindex from link message, ignoring: %m");
681 return 0;
682 } else if (ifindex <= 0) {
683 log_warning("rtnl: received link message with invalid ifindex %d, ignoring.", ifindex);
684 return 0;
685 }
686
687 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &name);
688 if (r < 0) {
689 log_warning_errno(r, "rtnl: Received link message without ifname, ignoring: %m");
690 return 0;
691 }
692
693 (void) link_get(m, ifindex, &link);
694 (void) netdev_get(m, name, &netdev);
695
696 switch (type) {
697 case RTM_NEWLINK:
698 if (!link) {
699 /* link is new, so add it */
700 r = link_add(m, message, &link);
701 if (r < 0) {
702 log_warning_errno(r, "Could not process new link message, ignoring: %m");
703 return 0;
704 }
705 }
706
707 if (netdev) {
708 /* netdev exists, so make sure the ifindex matches */
709 r = netdev_set_ifindex(netdev, message);
710 if (r < 0) {
711 log_warning_errno(r, "Could not process new link message for netdev, ignoring: %m");
712 return 0;
713 }
714 }
715
716 r = link_update(link, message);
717 if (r < 0) {
718 log_warning_errno(r, "Could not process link message, ignoring: %m");
719 return 0;
720 }
721
722 break;
723
724 case RTM_DELLINK:
725 link_drop(link);
726 netdev_drop(netdev);
727
728 break;
729
730 default:
731 assert_not_reached("Received link message with invalid RTNL message type.");
732 }
733
734 return 1;
735 }
736
737 int manager_rtnl_process_rule(sd_netlink *rtnl, sd_netlink_message *message, void *userdata) {
738 _cleanup_(routing_policy_rule_freep) RoutingPolicyRule *tmp = NULL;
739 RoutingPolicyRule *rule = NULL;
740 const char *iif = NULL, *oif = NULL;
741 Manager *m = userdata;
742 unsigned flags;
743 uint16_t type;
744 int r;
745
746 assert(rtnl);
747 assert(message);
748 assert(m);
749
750 if (sd_netlink_message_is_error(message)) {
751 r = sd_netlink_message_get_errno(message);
752 if (r < 0)
753 log_warning_errno(r, "rtnl: failed to receive rule message, ignoring: %m");
754
755 return 0;
756 }
757
758 r = sd_netlink_message_get_type(message, &type);
759 if (r < 0) {
760 log_warning_errno(r, "rtnl: could not get message type, ignoring: %m");
761 return 0;
762 } else if (!IN_SET(type, RTM_NEWRULE, RTM_DELRULE)) {
763 log_warning("rtnl: received unexpected message type %u when processing rule, ignoring.", type);
764 return 0;
765 }
766
767 r = routing_policy_rule_new(&tmp);
768 if (r < 0) {
769 log_oom();
770 return 0;
771 }
772
773 r = sd_rtnl_message_get_family(message, &tmp->family);
774 if (r < 0) {
775 log_warning_errno(r, "rtnl: could not get rule family, ignoring: %m");
776 return 0;
777 } else if (!IN_SET(tmp->family, AF_INET, AF_INET6)) {
778 log_debug("rtnl: received rule message with invalid family %d, ignoring.", tmp->family);
779 return 0;
780 }
781
782 switch (tmp->family) {
783 case AF_INET:
784 r = sd_netlink_message_read_in_addr(message, FRA_SRC, &tmp->from.in);
785 if (r < 0 && r != -ENODATA) {
786 log_warning_errno(r, "rtnl: could not get FRA_SRC attribute, ignoring: %m");
787 return 0;
788 } else if (r >= 0) {
789 r = sd_rtnl_message_routing_policy_rule_get_rtm_src_prefixlen(message, &tmp->from_prefixlen);
790 if (r < 0) {
791 log_warning_errno(r, "rtnl: received rule message without valid source prefix length, ignoring: %m");
792 return 0;
793 }
794 }
795
796 r = sd_netlink_message_read_in_addr(message, FRA_DST, &tmp->to.in);
797 if (r < 0 && r != -ENODATA) {
798 log_warning_errno(r, "rtnl: could not get FRA_DST attribute, ignoring: %m");
799 return 0;
800 } else if (r >= 0) {
801 r = sd_rtnl_message_routing_policy_rule_get_rtm_dst_prefixlen(message, &tmp->to_prefixlen);
802 if (r < 0) {
803 log_warning_errno(r, "rtnl: received rule message without valid destination prefix length, ignoring: %m");
804 return 0;
805 }
806 }
807
808 break;
809
810 case AF_INET6:
811 r = sd_netlink_message_read_in6_addr(message, FRA_SRC, &tmp->from.in6);
812 if (r < 0 && r != -ENODATA) {
813 log_warning_errno(r, "rtnl: could not get FRA_SRC attribute, ignoring: %m");
814 return 0;
815 } else if (r >= 0) {
816 r = sd_rtnl_message_routing_policy_rule_get_rtm_src_prefixlen(message, &tmp->from_prefixlen);
817 if (r < 0) {
818 log_warning_errno(r, "rtnl: received rule message without valid source prefix length, ignoring: %m");
819 return 0;
820 }
821 }
822
823 r = sd_netlink_message_read_in6_addr(message, FRA_DST, &tmp->to.in6);
824 if (r < 0 && r != -ENODATA) {
825 log_warning_errno(r, "rtnl: could not get FRA_DST attribute, ignoring: %m");
826 return 0;
827 } else if (r >= 0) {
828 r = sd_rtnl_message_routing_policy_rule_get_rtm_dst_prefixlen(message, &tmp->to_prefixlen);
829 if (r < 0) {
830 log_warning_errno(r, "rtnl: received rule message without valid destination prefix length, ignoring: %m");
831 return 0;
832 }
833 }
834
835 break;
836
837 default:
838 assert_not_reached("Received rule message with unsupported address family");
839 }
840
841 if (tmp->from_prefixlen == 0 && tmp->to_prefixlen == 0)
842 return 0;
843
844 r = sd_rtnl_message_routing_policy_rule_get_flags(message, &flags);
845 if (r < 0) {
846 log_warning_errno(r, "rtnl: received rule message without valid flag, ignoring: %m");
847 return 0;
848 }
849 tmp->invert_rule = flags & FIB_RULE_INVERT;
850
851 r = sd_netlink_message_read_u32(message, FRA_FWMARK, &tmp->fwmark);
852 if (r < 0 && r != -ENODATA) {
853 log_warning_errno(r, "rtnl: could not get FRA_FWMARK attribute, ignoring: %m");
854 return 0;
855 }
856
857 r = sd_netlink_message_read_u32(message, FRA_FWMASK, &tmp->fwmask);
858 if (r < 0 && r != -ENODATA) {
859 log_warning_errno(r, "rtnl: could not get FRA_FWMASK attribute, ignoring: %m");
860 return 0;
861 }
862
863 r = sd_netlink_message_read_u32(message, FRA_PRIORITY, &tmp->priority);
864 if (r < 0 && r != -ENODATA) {
865 log_warning_errno(r, "rtnl: could not get FRA_PRIORITY attribute, ignoring: %m");
866 return 0;
867 }
868
869 r = sd_netlink_message_read_u32(message, FRA_TABLE, &tmp->table);
870 if (r < 0 && r != -ENODATA) {
871 log_warning_errno(r, "rtnl: could not get FRA_TABLE attribute, ignoring: %m");
872 return 0;
873 }
874
875 r = sd_rtnl_message_routing_policy_rule_get_tos(message, &tmp->tos);
876 if (r < 0 && r != -ENODATA) {
877 log_warning_errno(r, "rtnl: could not get ip rule TOS, ignoring: %m");
878 return 0;
879 }
880
881 r = sd_netlink_message_read_string(message, FRA_IIFNAME, &iif);
882 if (r < 0 && r != -ENODATA) {
883 log_warning_errno(r, "rtnl: could not get FRA_IIFNAME attribute, ignoring: %m");
884 return 0;
885 }
886 r = free_and_strdup(&tmp->iif, iif);
887 if (r < 0)
888 return log_oom();
889
890 r = sd_netlink_message_read_string(message, FRA_OIFNAME, &oif);
891 if (r < 0 && r != -ENODATA) {
892 log_warning_errno(r, "rtnl: could not get FRA_OIFNAME attribute, ignoring: %m");
893 return 0;
894 }
895 r = free_and_strdup(&tmp->oif, oif);
896 if (r < 0)
897 return log_oom();
898
899 r = sd_netlink_message_read_u8(message, FRA_IP_PROTO, &tmp->protocol);
900 if (r < 0 && r != -ENODATA) {
901 log_warning_errno(r, "rtnl: could not get FRA_IP_PROTO attribute, ignoring: %m");
902 return 0;
903 }
904
905 r = sd_netlink_message_read(message, FRA_SPORT_RANGE, sizeof(tmp->sport), &tmp->sport);
906 if (r < 0 && r != -ENODATA) {
907 log_warning_errno(r, "rtnl: could not get FRA_SPORT_RANGE attribute, ignoring: %m");
908 return 0;
909 }
910
911 r = sd_netlink_message_read(message, FRA_DPORT_RANGE, sizeof(tmp->dport), &tmp->dport);
912 if (r < 0 && r != -ENODATA) {
913 log_warning_errno(r, "rtnl: could not get FRA_DPORT_RANGE attribute, ignoring: %m");
914 return 0;
915 }
916
917 (void) routing_policy_rule_get(m, tmp, &rule);
918
919 switch (type) {
920 case RTM_NEWRULE:
921 if (!rule) {
922 r = routing_policy_rule_add_foreign(m, tmp, &rule);
923 if (r < 0) {
924 log_warning_errno(r, "Could not remember foreign rule, ignoring: %m");
925 return 0;
926 }
927 }
928 break;
929 case RTM_DELRULE:
930 routing_policy_rule_free(rule);
931
932 break;
933
934 default:
935 assert_not_reached("Received invalid RTNL message type");
936 }
937
938 return 1;
939 }
940
941 static int systemd_netlink_fd(void) {
942 int n, fd, rtnl_fd = -EINVAL;
943
944 n = sd_listen_fds(true);
945 if (n <= 0)
946 return -EINVAL;
947
948 for (fd = SD_LISTEN_FDS_START; fd < SD_LISTEN_FDS_START + n; fd ++) {
949 if (sd_is_socket(fd, AF_NETLINK, SOCK_RAW, -1) > 0) {
950 if (rtnl_fd >= 0)
951 return -EINVAL;
952
953 rtnl_fd = fd;
954 }
955 }
956
957 return rtnl_fd;
958 }
959
960 static int manager_connect_genl(Manager *m) {
961 int r;
962
963 assert(m);
964
965 r = sd_genl_socket_open(&m->genl);
966 if (r < 0)
967 return r;
968
969 r = sd_netlink_inc_rcvbuf(m->genl, RCVBUF_SIZE);
970 if (r < 0)
971 return r;
972
973 r = sd_netlink_attach_event(m->genl, m->event, 0);
974 if (r < 0)
975 return r;
976
977 return 0;
978 }
979
980 static int manager_connect_rtnl(Manager *m) {
981 int fd, r;
982
983 assert(m);
984
985 fd = systemd_netlink_fd();
986 if (fd < 0)
987 r = sd_netlink_open(&m->rtnl);
988 else
989 r = sd_netlink_open_fd(&m->rtnl, fd);
990 if (r < 0)
991 return r;
992
993 r = sd_netlink_inc_rcvbuf(m->rtnl, RCVBUF_SIZE);
994 if (r < 0)
995 return r;
996
997 r = sd_netlink_attach_event(m->rtnl, m->event, 0);
998 if (r < 0)
999 return r;
1000
1001 r = sd_netlink_add_match(m->rtnl, NULL, RTM_NEWLINK, &manager_rtnl_process_link, NULL, m, "network-rtnl_process_link");
1002 if (r < 0)
1003 return r;
1004
1005 r = sd_netlink_add_match(m->rtnl, NULL, RTM_DELLINK, &manager_rtnl_process_link, NULL, m, "network-rtnl_process_link");
1006 if (r < 0)
1007 return r;
1008
1009 r = sd_netlink_add_match(m->rtnl, NULL, RTM_NEWADDR, &manager_rtnl_process_address, NULL, m, "network-rtnl_process_address");
1010 if (r < 0)
1011 return r;
1012
1013 r = sd_netlink_add_match(m->rtnl, NULL, RTM_DELADDR, &manager_rtnl_process_address, NULL, m, "network-rtnl_process_address");
1014 if (r < 0)
1015 return r;
1016
1017 r = sd_netlink_add_match(m->rtnl, NULL, RTM_NEWROUTE, &manager_rtnl_process_route, NULL, m, "network-rtnl_process_route");
1018 if (r < 0)
1019 return r;
1020
1021 r = sd_netlink_add_match(m->rtnl, NULL, RTM_DELROUTE, &manager_rtnl_process_route, NULL, m, "network-rtnl_process_route");
1022 if (r < 0)
1023 return r;
1024
1025 r = sd_netlink_add_match(m->rtnl, NULL, RTM_NEWRULE, &manager_rtnl_process_rule, NULL, m, "network-rtnl_process_rule");
1026 if (r < 0)
1027 return r;
1028
1029 r = sd_netlink_add_match(m->rtnl, NULL, RTM_DELRULE, &manager_rtnl_process_rule, NULL, m, "network-rtnl_process_rule");
1030 if (r < 0)
1031 return r;
1032
1033 return 0;
1034 }
1035
1036 static int ordered_set_put_in_addr_data(OrderedSet *s, const struct in_addr_data *address) {
1037 char *p;
1038 int r;
1039
1040 assert(s);
1041 assert(address);
1042
1043 r = in_addr_to_string(address->family, &address->address, &p);
1044 if (r < 0)
1045 return r;
1046
1047 r = ordered_set_consume(s, p);
1048 if (r == -EEXIST)
1049 return 0;
1050
1051 return r;
1052 }
1053
1054 static int ordered_set_put_in_addr_datav(OrderedSet *s, const struct in_addr_data *addresses, unsigned n) {
1055 int r, c = 0;
1056 unsigned i;
1057
1058 assert(s);
1059 assert(addresses || n == 0);
1060
1061 for (i = 0; i < n; i++) {
1062 r = ordered_set_put_in_addr_data(s, addresses+i);
1063 if (r < 0)
1064 return r;
1065
1066 c += r;
1067 }
1068
1069 return c;
1070 }
1071
1072 static int ordered_set_put_in4_addr(OrderedSet *s, const struct in_addr *address) {
1073 char *p;
1074 int r;
1075
1076 assert(s);
1077 assert(address);
1078
1079 r = in_addr_to_string(AF_INET, (const union in_addr_union*) address, &p);
1080 if (r < 0)
1081 return r;
1082
1083 r = ordered_set_consume(s, p);
1084 if (r == -EEXIST)
1085 return 0;
1086
1087 return r;
1088 }
1089
1090 static int ordered_set_put_in4_addrv(OrderedSet *s,
1091 const struct in_addr *addresses,
1092 size_t n,
1093 bool (*predicate)(const struct in_addr *addr)) {
1094 int r, c = 0;
1095 size_t i;
1096
1097 assert(s);
1098 assert(n == 0 || addresses);
1099
1100 for (i = 0; i < n; i++) {
1101 if (predicate && !predicate(&addresses[i]))
1102 continue;
1103 r = ordered_set_put_in4_addr(s, addresses+i);
1104 if (r < 0)
1105 return r;
1106
1107 c += r;
1108 }
1109
1110 return c;
1111 }
1112
1113 static int manager_save(Manager *m) {
1114 _cleanup_ordered_set_free_free_ OrderedSet *dns = NULL, *ntp = NULL, *search_domains = NULL, *route_domains = NULL;
1115 Link *link;
1116 Iterator i;
1117 _cleanup_free_ char *temp_path = NULL;
1118 _cleanup_strv_free_ char **p = NULL;
1119 _cleanup_fclose_ FILE *f = NULL;
1120 LinkOperationalState operstate = LINK_OPERSTATE_OFF;
1121 LinkCarrierState carrier_state = LINK_CARRIER_STATE_OFF;
1122 LinkAddressState address_state = LINK_ADDRESS_STATE_OFF;
1123 const char *operstate_str, *carrier_state_str, *address_state_str;
1124 int r;
1125
1126 assert(m);
1127 assert(m->state_file);
1128
1129 /* We add all NTP and DNS server to a set, to filter out duplicates */
1130 dns = ordered_set_new(&string_hash_ops);
1131 if (!dns)
1132 return -ENOMEM;
1133
1134 ntp = ordered_set_new(&string_hash_ops);
1135 if (!ntp)
1136 return -ENOMEM;
1137
1138 search_domains = ordered_set_new(&dns_name_hash_ops);
1139 if (!search_domains)
1140 return -ENOMEM;
1141
1142 route_domains = ordered_set_new(&dns_name_hash_ops);
1143 if (!route_domains)
1144 return -ENOMEM;
1145
1146 HASHMAP_FOREACH(link, m->links, i) {
1147 if (link->flags & IFF_LOOPBACK)
1148 continue;
1149
1150 if (link->operstate > operstate)
1151 operstate = link->operstate;
1152
1153 if (link->carrier_state > carrier_state)
1154 carrier_state = link->carrier_state;
1155
1156 if (link->address_state > address_state)
1157 address_state = link->address_state;
1158
1159 if (!link->network)
1160 continue;
1161
1162 /* First add the static configured entries */
1163 r = ordered_set_put_in_addr_datav(dns, link->network->dns, link->network->n_dns);
1164 if (r < 0)
1165 return r;
1166
1167 r = ordered_set_put_strdupv(ntp, link->ntp ?: link->network->ntp);
1168 if (r < 0)
1169 return r;
1170
1171 r = ordered_set_put_string_set(search_domains, link->search_domains ?: link->network->search_domains);
1172 if (r < 0)
1173 return r;
1174
1175 r = ordered_set_put_string_set(route_domains, link->route_domains ?: link->network->route_domains);
1176 if (r < 0)
1177 return r;
1178
1179 if (!link->dhcp_lease)
1180 continue;
1181
1182 /* Secondly, add the entries acquired via DHCP */
1183 if (link->network->dhcp_use_dns) {
1184 const struct in_addr *addresses;
1185
1186 r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
1187 if (r > 0) {
1188 r = ordered_set_put_in4_addrv(dns, addresses, r, in4_addr_is_non_local);
1189 if (r < 0)
1190 return r;
1191 } else if (r < 0 && r != -ENODATA)
1192 return r;
1193 }
1194
1195 if (link->network->dhcp_use_ntp) {
1196 const struct in_addr *addresses;
1197
1198 r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
1199 if (r > 0) {
1200 r = ordered_set_put_in4_addrv(ntp, addresses, r, in4_addr_is_non_local);
1201 if (r < 0)
1202 return r;
1203 } else if (r < 0 && r != -ENODATA)
1204 return r;
1205 }
1206
1207 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
1208 const char *domainname;
1209 char **domains = NULL;
1210
1211 OrderedSet *target_domains = (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) ? search_domains : route_domains;
1212 r = sd_dhcp_lease_get_domainname(link->dhcp_lease, &domainname);
1213 if (r >= 0) {
1214 r = ordered_set_put_strdup(target_domains, domainname);
1215 if (r < 0)
1216 return r;
1217 } else if (r != -ENODATA)
1218 return r;
1219
1220 r = sd_dhcp_lease_get_search_domains(link->dhcp_lease, &domains);
1221 if (r >= 0) {
1222 r = ordered_set_put_strdupv(target_domains, domains);
1223 if (r < 0)
1224 return r;
1225 } else if (r != -ENODATA)
1226 return r;
1227 }
1228 }
1229
1230 if (carrier_state >= LINK_CARRIER_STATE_ENSLAVED)
1231 carrier_state = LINK_CARRIER_STATE_CARRIER;
1232
1233 operstate_str = link_operstate_to_string(operstate);
1234 assert(operstate_str);
1235
1236 carrier_state_str = link_carrier_state_to_string(carrier_state);
1237 assert(carrier_state_str);
1238
1239 address_state_str = link_address_state_to_string(address_state);
1240 assert(address_state_str);
1241
1242 r = fopen_temporary(m->state_file, &f, &temp_path);
1243 if (r < 0)
1244 return r;
1245
1246 (void) fchmod(fileno(f), 0644);
1247
1248 fprintf(f,
1249 "# This is private data. Do not parse.\n"
1250 "OPER_STATE=%s\n"
1251 "CARRIER_STATE=%s\n"
1252 "ADDRESS_STATE=%s\n",
1253 operstate_str, carrier_state_str, address_state_str);
1254
1255 ordered_set_print(f, "DNS=", dns);
1256 ordered_set_print(f, "NTP=", ntp);
1257 ordered_set_print(f, "DOMAINS=", search_domains);
1258 ordered_set_print(f, "ROUTE_DOMAINS=", route_domains);
1259
1260 r = routing_policy_serialize_rules(m->rules, f);
1261 if (r < 0)
1262 goto fail;
1263
1264 r = fflush_and_check(f);
1265 if (r < 0)
1266 goto fail;
1267
1268 if (rename(temp_path, m->state_file) < 0) {
1269 r = -errno;
1270 goto fail;
1271 }
1272
1273 if (m->operational_state != operstate) {
1274 m->operational_state = operstate;
1275 if (strv_extend(&p, "OperationalState") < 0)
1276 log_oom();
1277 }
1278
1279 if (m->carrier_state != carrier_state) {
1280 m->carrier_state = carrier_state;
1281 if (strv_extend(&p, "CarrierState") < 0)
1282 log_oom();
1283 }
1284
1285 if (m->address_state != address_state) {
1286 m->address_state = address_state;
1287 if (strv_extend(&p, "AddressState") < 0)
1288 log_oom();
1289 }
1290
1291 if (p) {
1292 r = manager_send_changed_strv(m, p);
1293 if (r < 0)
1294 log_error_errno(r, "Could not emit changed properties: %m");
1295 }
1296
1297 m->dirty = false;
1298
1299 return 0;
1300
1301 fail:
1302 (void) unlink(m->state_file);
1303 (void) unlink(temp_path);
1304
1305 return log_error_errno(r, "Failed to save network state to %s: %m", m->state_file);
1306 }
1307
1308 static int manager_dirty_handler(sd_event_source *s, void *userdata) {
1309 Manager *m = userdata;
1310 Link *link;
1311 Iterator i;
1312
1313 assert(m);
1314
1315 if (m->dirty)
1316 manager_save(m);
1317
1318 SET_FOREACH(link, m->dirty_links, i)
1319 if (link_save(link) >= 0)
1320 link_clean(link);
1321
1322 return 1;
1323 }
1324
1325 int manager_new(Manager **ret) {
1326 _cleanup_(manager_freep) Manager *m = NULL;
1327 int r;
1328
1329 m = new(Manager, 1);
1330 if (!m)
1331 return -ENOMEM;
1332
1333 *m = (Manager) {
1334 .speed_meter_interval_usec = SPEED_METER_DEFAULT_TIME_INTERVAL,
1335 };
1336
1337 m->state_file = strdup("/run/systemd/netif/state");
1338 if (!m->state_file)
1339 return -ENOMEM;
1340
1341 r = sd_event_default(&m->event);
1342 if (r < 0)
1343 return r;
1344
1345 (void) sd_event_set_watchdog(m->event, true);
1346 (void) sd_event_add_signal(m->event, NULL, SIGTERM, NULL, NULL);
1347 (void) sd_event_add_signal(m->event, NULL, SIGINT, NULL, NULL);
1348
1349 r = sd_event_add_post(m->event, NULL, manager_dirty_handler, m);
1350 if (r < 0)
1351 return r;
1352
1353 r = manager_connect_rtnl(m);
1354 if (r < 0)
1355 return r;
1356
1357 r = manager_connect_genl(m);
1358 if (r < 0)
1359 return r;
1360
1361 r = manager_connect_udev(m);
1362 if (r < 0)
1363 return r;
1364
1365 r = sd_resolve_default(&m->resolve);
1366 if (r < 0)
1367 return r;
1368
1369 r = sd_resolve_attach_event(m->resolve, m->event, 0);
1370 if (r < 0)
1371 return r;
1372
1373 r = setup_default_address_pool(m);
1374 if (r < 0)
1375 return r;
1376
1377 m->duid.type = DUID_TYPE_EN;
1378
1379 (void) routing_policy_load_rules(m->state_file, &m->rules_saved);
1380
1381 *ret = TAKE_PTR(m);
1382
1383 return 0;
1384 }
1385
1386 void manager_free(Manager *m) {
1387 struct in6_addr *a;
1388 AddressPool *pool;
1389 Link *link;
1390
1391 if (!m)
1392 return;
1393
1394 free(m->state_file);
1395
1396 while ((a = hashmap_first_key(m->dhcp6_prefixes)))
1397 (void) dhcp6_prefix_remove(m, a);
1398 m->dhcp6_prefixes = hashmap_free(m->dhcp6_prefixes);
1399
1400 while ((link = hashmap_steal_first(m->links))) {
1401 if (link->dhcp6_client)
1402 (void) dhcp6_lease_pd_prefix_lost(link->dhcp6_client, link);
1403
1404 (void) link_stop_clients(link, true);
1405
1406 link_unref(link);
1407 }
1408
1409 m->dirty_links = set_free_with_destructor(m->dirty_links, link_unref);
1410 m->links_requesting_uuid = set_free_with_destructor(m->links_requesting_uuid, link_unref);
1411 m->links = hashmap_free_with_destructor(m->links, link_unref);
1412
1413 m->duids_requesting_uuid = set_free(m->duids_requesting_uuid);
1414 m->networks = ordered_hashmap_free_with_destructor(m->networks, network_unref);
1415
1416 m->netdevs = hashmap_free_with_destructor(m->netdevs, netdev_unref);
1417
1418 while ((pool = m->address_pools))
1419 address_pool_free(pool);
1420
1421 /* routing_policy_rule_free() access m->rules and m->rules_foreign.
1422 * So, it is necessary to set NULL after the sets are freed. */
1423 m->rules = set_free_with_destructor(m->rules, routing_policy_rule_free);
1424 m->rules_foreign = set_free_with_destructor(m->rules_foreign, routing_policy_rule_free);
1425 set_free_with_destructor(m->rules_saved, routing_policy_rule_free);
1426
1427 sd_netlink_unref(m->rtnl);
1428 sd_netlink_unref(m->genl);
1429 sd_resolve_unref(m->resolve);
1430
1431 sd_event_source_unref(m->speed_meter_event_source);
1432 sd_event_unref(m->event);
1433
1434 sd_device_monitor_unref(m->device_monitor);
1435
1436 bus_verify_polkit_async_registry_free(m->polkit_registry);
1437 sd_bus_flush_close_unref(m->bus);
1438
1439 free(m->dynamic_timezone);
1440 free(m->dynamic_hostname);
1441
1442 free(m);
1443 }
1444
1445 int manager_start(Manager *m) {
1446 Link *link;
1447 Iterator i;
1448 int r;
1449
1450 assert(m);
1451
1452 r = manager_start_speed_meter(m);
1453 if (r < 0)
1454 return log_error_errno(r, "Failed to initialize speed meter: %m");
1455
1456 /* The dirty handler will deal with future serialization, but the first one
1457 must be done explicitly. */
1458
1459 manager_save(m);
1460
1461 HASHMAP_FOREACH(link, m->links, i)
1462 link_save(link);
1463
1464 return 0;
1465 }
1466
1467 int manager_load_config(Manager *m) {
1468 int r;
1469
1470 /* update timestamp */
1471 paths_check_timestamp(NETWORK_DIRS, &m->network_dirs_ts_usec, true);
1472
1473 r = netdev_load(m);
1474 if (r < 0)
1475 return r;
1476
1477 r = network_load(m);
1478 if (r < 0)
1479 return r;
1480
1481 return 0;
1482 }
1483
1484 bool manager_should_reload(Manager *m) {
1485 return paths_check_timestamp(NETWORK_DIRS, &m->network_dirs_ts_usec, false);
1486 }
1487
1488 int manager_rtnl_enumerate_links(Manager *m) {
1489 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
1490 sd_netlink_message *link;
1491 int r;
1492
1493 assert(m);
1494 assert(m->rtnl);
1495
1496 r = sd_rtnl_message_new_link(m->rtnl, &req, RTM_GETLINK, 0);
1497 if (r < 0)
1498 return r;
1499
1500 r = sd_netlink_message_request_dump(req, true);
1501 if (r < 0)
1502 return r;
1503
1504 r = sd_netlink_call(m->rtnl, req, 0, &reply);
1505 if (r < 0)
1506 return r;
1507
1508 for (link = reply; link; link = sd_netlink_message_next(link)) {
1509 int k;
1510
1511 m->enumerating = true;
1512
1513 k = manager_rtnl_process_link(m->rtnl, link, m);
1514 if (k < 0)
1515 r = k;
1516
1517 m->enumerating = false;
1518 }
1519
1520 return r;
1521 }
1522
1523 int manager_rtnl_enumerate_addresses(Manager *m) {
1524 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
1525 sd_netlink_message *addr;
1526 int r;
1527
1528 assert(m);
1529 assert(m->rtnl);
1530
1531 r = sd_rtnl_message_new_addr(m->rtnl, &req, RTM_GETADDR, 0, 0);
1532 if (r < 0)
1533 return r;
1534
1535 r = sd_netlink_message_request_dump(req, true);
1536 if (r < 0)
1537 return r;
1538
1539 r = sd_netlink_call(m->rtnl, req, 0, &reply);
1540 if (r < 0)
1541 return r;
1542
1543 for (addr = reply; addr; addr = sd_netlink_message_next(addr)) {
1544 int k;
1545
1546 m->enumerating = true;
1547
1548 k = manager_rtnl_process_address(m->rtnl, addr, m);
1549 if (k < 0)
1550 r = k;
1551
1552 m->enumerating = false;
1553 }
1554
1555 return r;
1556 }
1557
1558 int manager_rtnl_enumerate_routes(Manager *m) {
1559 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
1560 sd_netlink_message *route;
1561 int r;
1562
1563 assert(m);
1564 assert(m->rtnl);
1565
1566 r = sd_rtnl_message_new_route(m->rtnl, &req, RTM_GETROUTE, 0, 0);
1567 if (r < 0)
1568 return r;
1569
1570 r = sd_netlink_message_request_dump(req, true);
1571 if (r < 0)
1572 return r;
1573
1574 r = sd_netlink_call(m->rtnl, req, 0, &reply);
1575 if (r < 0)
1576 return r;
1577
1578 for (route = reply; route; route = sd_netlink_message_next(route)) {
1579 int k;
1580
1581 m->enumerating = true;
1582
1583 k = manager_rtnl_process_route(m->rtnl, route, m);
1584 if (k < 0)
1585 r = k;
1586
1587 m->enumerating = false;
1588 }
1589
1590 return r;
1591 }
1592
1593 int manager_rtnl_enumerate_rules(Manager *m) {
1594 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
1595 sd_netlink_message *rule;
1596 int r;
1597
1598 assert(m);
1599 assert(m->rtnl);
1600
1601 r = sd_rtnl_message_new_routing_policy_rule(m->rtnl, &req, RTM_GETRULE, 0);
1602 if (r < 0)
1603 return r;
1604
1605 r = sd_netlink_message_request_dump(req, true);
1606 if (r < 0)
1607 return r;
1608
1609 r = sd_netlink_call(m->rtnl, req, 0, &reply);
1610 if (r < 0) {
1611 if (r == -EOPNOTSUPP) {
1612 log_debug("FIB Rules are not supported by the kernel. Ignoring.");
1613 return 0;
1614 }
1615
1616 return r;
1617 }
1618
1619 for (rule = reply; rule; rule = sd_netlink_message_next(rule)) {
1620 int k;
1621
1622 m->enumerating = true;
1623
1624 k = manager_rtnl_process_rule(m->rtnl, rule, m);
1625 if (k < 0)
1626 r = k;
1627
1628 m->enumerating = false;
1629 }
1630
1631 return r;
1632 }
1633
1634 int manager_address_pool_acquire(Manager *m, int family, unsigned prefixlen, union in_addr_union *found) {
1635 AddressPool *p;
1636 int r;
1637
1638 assert(m);
1639 assert(prefixlen > 0);
1640 assert(found);
1641
1642 LIST_FOREACH(address_pools, p, m->address_pools) {
1643 if (p->family != family)
1644 continue;
1645
1646 r = address_pool_acquire(p, prefixlen, found);
1647 if (r != 0)
1648 return r;
1649 }
1650
1651 return 0;
1652 }
1653
1654 Link* manager_find_uplink(Manager *m, Link *exclude) {
1655 _cleanup_free_ struct local_address *gateways = NULL;
1656 int n, i;
1657
1658 assert(m);
1659
1660 /* Looks for a suitable "uplink", via black magic: an
1661 * interface that is up and where the default route with the
1662 * highest priority points to. */
1663
1664 n = local_gateways(m->rtnl, 0, AF_UNSPEC, &gateways);
1665 if (n < 0) {
1666 log_warning_errno(n, "Failed to determine list of default gateways: %m");
1667 return NULL;
1668 }
1669
1670 for (i = 0; i < n; i++) {
1671 Link *link;
1672
1673 link = hashmap_get(m->links, INT_TO_PTR(gateways[i].ifindex));
1674 if (!link) {
1675 log_debug("Weird, found a gateway for a link we don't know. Ignoring.");
1676 continue;
1677 }
1678
1679 if (link == exclude)
1680 continue;
1681
1682 if (link->operstate < LINK_OPERSTATE_ROUTABLE)
1683 continue;
1684
1685 return link;
1686 }
1687
1688 return NULL;
1689 }
1690
1691 void manager_dirty(Manager *manager) {
1692 assert(manager);
1693
1694 /* the serialized state in /run is no longer up-to-date */
1695 manager->dirty = true;
1696 }
1697
1698 static int set_hostname_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
1699 Manager *manager = userdata;
1700 const sd_bus_error *e;
1701
1702 assert(m);
1703 assert(manager);
1704
1705 e = sd_bus_message_get_error(m);
1706 if (e)
1707 log_warning_errno(sd_bus_error_get_errno(e), "Could not set hostname: %s", e->message);
1708
1709 return 1;
1710 }
1711
1712 int manager_set_hostname(Manager *m, const char *hostname) {
1713 int r;
1714
1715 log_debug("Setting transient hostname: '%s'", strna(hostname));
1716
1717 if (free_and_strdup(&m->dynamic_hostname, hostname) < 0)
1718 return log_oom();
1719
1720 if (!m->bus || sd_bus_is_ready(m->bus) <= 0) {
1721 log_debug("Not connected to system bus, setting hostname later.");
1722 return 0;
1723 }
1724
1725 r = sd_bus_call_method_async(
1726 m->bus,
1727 NULL,
1728 "org.freedesktop.hostname1",
1729 "/org/freedesktop/hostname1",
1730 "org.freedesktop.hostname1",
1731 "SetHostname",
1732 set_hostname_handler,
1733 m,
1734 "sb",
1735 hostname,
1736 false);
1737
1738 if (r < 0)
1739 return log_error_errno(r, "Could not set transient hostname: %m");
1740
1741 return 0;
1742 }
1743
1744 static int set_timezone_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
1745 Manager *manager = userdata;
1746 const sd_bus_error *e;
1747
1748 assert(m);
1749 assert(manager);
1750
1751 e = sd_bus_message_get_error(m);
1752 if (e)
1753 log_warning_errno(sd_bus_error_get_errno(e), "Could not set timezone: %s", e->message);
1754
1755 return 1;
1756 }
1757
1758 int manager_set_timezone(Manager *m, const char *tz) {
1759 int r;
1760
1761 assert(m);
1762 assert(tz);
1763
1764 log_debug("Setting system timezone: '%s'", tz);
1765 if (free_and_strdup(&m->dynamic_timezone, tz) < 0)
1766 return log_oom();
1767
1768 if (!m->bus || sd_bus_is_ready(m->bus) <= 0) {
1769 log_debug("Not connected to system bus, setting timezone later.");
1770 return 0;
1771 }
1772
1773 r = sd_bus_call_method_async(
1774 m->bus,
1775 NULL,
1776 "org.freedesktop.timedate1",
1777 "/org/freedesktop/timedate1",
1778 "org.freedesktop.timedate1",
1779 "SetTimezone",
1780 set_timezone_handler,
1781 m,
1782 "sb",
1783 tz,
1784 false);
1785 if (r < 0)
1786 return log_error_errno(r, "Could not set timezone: %m");
1787
1788 return 0;
1789 }
1790
1791 int manager_request_product_uuid(Manager *m, Link *link) {
1792 int r;
1793
1794 assert(m);
1795
1796 if (m->has_product_uuid)
1797 return 0;
1798
1799 log_debug("Requesting product UUID");
1800
1801 if (link) {
1802 DUID *duid;
1803
1804 assert_se(duid = link_get_duid(link));
1805
1806 r = set_ensure_allocated(&m->links_requesting_uuid, NULL);
1807 if (r < 0)
1808 return log_oom();
1809
1810 r = set_ensure_allocated(&m->duids_requesting_uuid, NULL);
1811 if (r < 0)
1812 return log_oom();
1813
1814 r = set_put(m->links_requesting_uuid, link);
1815 if (r < 0)
1816 return log_oom();
1817
1818 r = set_put(m->duids_requesting_uuid, duid);
1819 if (r < 0)
1820 return log_oom();
1821 }
1822
1823 if (!m->bus || sd_bus_is_ready(m->bus) <= 0) {
1824 log_debug("Not connected to system bus, requesting product UUID later.");
1825 return 0;
1826 }
1827
1828 r = sd_bus_call_method_async(
1829 m->bus,
1830 NULL,
1831 "org.freedesktop.hostname1",
1832 "/org/freedesktop/hostname1",
1833 "org.freedesktop.hostname1",
1834 "GetProductUUID",
1835 get_product_uuid_handler,
1836 m,
1837 "b",
1838 false);
1839 if (r < 0)
1840 return log_warning_errno(r, "Failed to get product UUID: %m");
1841
1842 return 0;
1843 }
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