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f579559b TG |
1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2013 Tom Gundersen <teg@jklm.no> | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
9 | under the terms of the GNU Lesser General Public License as published by | |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | Lesser General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU Lesser General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
22 | #include <netinet/ether.h> | |
23 | #include <linux/if.h> | |
24 | ||
25 | #include "networkd.h" | |
26 | #include "libudev-private.h" | |
27 | #include "util.h" | |
1346b1f0 | 28 | #include "bus-util.h" |
c6f7c917 | 29 | #include "network-internal.h" |
f579559b | 30 | |
fe8db0c5 TG |
31 | #include "dhcp-lease-internal.h" |
32 | ||
aba496a5 UTL |
33 | static int ipv4ll_address_update(Link *link, bool deprecate); |
34 | static bool ipv4ll_is_bound(sd_ipv4ll *ll); | |
35 | ||
f579559b TG |
36 | int link_new(Manager *manager, struct udev_device *device, Link **ret) { |
37 | _cleanup_link_free_ Link *link = NULL; | |
c166a070 | 38 | const char *ifname; |
f579559b TG |
39 | int r; |
40 | ||
0c2f9b84 TG |
41 | assert(manager); |
42 | assert(manager->links); | |
f579559b TG |
43 | assert(device); |
44 | assert(ret); | |
45 | ||
46 | link = new0(Link, 1); | |
47 | if (!link) | |
48 | return -ENOMEM; | |
49 | ||
5a3eb5a7 TG |
50 | link->manager = manager; |
51 | link->state = _LINK_STATE_INVALID; | |
52 | ||
0617ffab TG |
53 | link->ifindex = udev_device_get_ifindex(device); |
54 | if (link->ifindex <= 0) | |
f579559b TG |
55 | return -EINVAL; |
56 | ||
315db1a8 ZJS |
57 | r = asprintf(&link->state_file, "/run/systemd/network/links/%"PRIu64, |
58 | link->ifindex); | |
fe8db0c5 | 59 | if (r < 0) |
315db1a8 | 60 | return -ENOMEM; |
fe8db0c5 | 61 | |
c166a070 TG |
62 | ifname = udev_device_get_sysname(device); |
63 | link->ifname = strdup(ifname); | |
64 | ||
0617ffab | 65 | r = hashmap_put(manager->links, &link->ifindex, link); |
f579559b TG |
66 | if (r < 0) |
67 | return r; | |
68 | ||
b5db00e5 UTL |
69 | link->udev_device = udev_device_ref(device); |
70 | ||
f579559b TG |
71 | *ret = link; |
72 | link = NULL; | |
73 | ||
74 | return 0; | |
75 | } | |
76 | ||
77 | void link_free(Link *link) { | |
78 | if (!link) | |
79 | return; | |
80 | ||
0617ffab | 81 | assert(link->manager); |
f579559b | 82 | |
e5b04c8d | 83 | sd_dhcp_client_unref(link->dhcp_client); |
a6cc569e | 84 | sd_dhcp_lease_unref(link->dhcp_lease); |
f5be5601 | 85 | |
56cd007a | 86 | sd_ipv4ll_unref(link->ipv4ll); |
5c1d3fc9 | 87 | |
0617ffab | 88 | hashmap_remove(link->manager->links, &link->ifindex); |
f579559b | 89 | |
c166a070 | 90 | free(link->ifname); |
fe8db0c5 | 91 | free(link->state_file); |
c166a070 | 92 | |
b5db00e5 UTL |
93 | udev_device_unref(link->udev_device); |
94 | ||
f579559b TG |
95 | free(link); |
96 | } | |
97 | ||
11a7f229 TG |
98 | int link_get(Manager *m, int ifindex, Link **ret) { |
99 | Link *link; | |
100 | uint64_t ifindex_64; | |
101 | ||
102 | assert(m); | |
103 | assert(m->links); | |
104 | assert(ifindex); | |
105 | assert(ret); | |
106 | ||
107 | ifindex_64 = ifindex; | |
108 | link = hashmap_get(m->links, &ifindex_64); | |
109 | if (!link) | |
110 | return -ENODEV; | |
111 | ||
112 | *ret = link; | |
113 | ||
114 | return 0; | |
115 | } | |
116 | ||
f882c247 | 117 | static int link_enter_configured(Link *link) { |
ef1ba606 TG |
118 | assert(link); |
119 | assert(link->state == LINK_STATE_SETTING_ROUTES); | |
120 | ||
39032b87 | 121 | log_info_link(link, "link configured"); |
f882c247 TG |
122 | |
123 | link->state = LINK_STATE_CONFIGURED; | |
124 | ||
fe8db0c5 TG |
125 | link_save(link); |
126 | ||
f882c247 TG |
127 | return 0; |
128 | } | |
129 | ||
ef1ba606 TG |
130 | static void link_enter_failed(Link *link) { |
131 | assert(link); | |
f882c247 | 132 | |
39032b87 | 133 | log_warning_link(link, "failed"); |
449f7554 | 134 | |
ef1ba606 | 135 | link->state = LINK_STATE_FAILED; |
fe8db0c5 TG |
136 | |
137 | link_save(link); | |
f882c247 TG |
138 | } |
139 | ||
f882c247 TG |
140 | static int route_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { |
141 | Link *link = userdata; | |
142 | int r; | |
143 | ||
f5be5601 TG |
144 | assert(link->route_messages > 0); |
145 | assert(link->state == LINK_STATE_SETTING_ADDRESSES || | |
146 | link->state == LINK_STATE_SETTING_ROUTES || | |
147 | link->state == LINK_STATE_FAILED); | |
f882c247 | 148 | |
f5be5601 | 149 | link->route_messages --; |
f882c247 TG |
150 | |
151 | if (link->state == LINK_STATE_FAILED) | |
152 | return 1; | |
153 | ||
154 | r = sd_rtnl_message_get_errno(m); | |
c166a070 | 155 | if (r < 0 && r != -EEXIST) |
c9ccc19f TG |
156 | log_struct_link(LOG_WARNING, link, |
157 | "MESSAGE=%s: could not set route: %s", | |
158 | link->ifname, strerror(-r), | |
159 | "ERRNO=%d", -r, | |
160 | NULL); | |
f882c247 | 161 | |
f5be5601 TG |
162 | /* we might have received an old reply after moving back to SETTING_ADDRESSES, |
163 | * ignore it */ | |
164 | if (link->route_messages == 0 && link->state == LINK_STATE_SETTING_ROUTES) { | |
39032b87 | 165 | log_debug_link(link, "routes set"); |
dd3efc09 TG |
166 | link_enter_configured(link); |
167 | } | |
f882c247 TG |
168 | |
169 | return 1; | |
170 | } | |
171 | ||
172 | static int link_enter_set_routes(Link *link) { | |
a6cc569e | 173 | Route *rt; |
f882c247 TG |
174 | int r; |
175 | ||
176 | assert(link); | |
177 | assert(link->network); | |
ef1ba606 | 178 | assert(link->state == LINK_STATE_SETTING_ADDRESSES); |
f882c247 | 179 | |
ef1ba606 | 180 | link->state = LINK_STATE_SETTING_ROUTES; |
f882c247 | 181 | |
5c1d3fc9 | 182 | if (!link->network->static_routes && !link->dhcp_lease && |
aba496a5 | 183 | (!link->ipv4ll || ipv4ll_is_bound(link->ipv4ll) == false)) |
dd3efc09 | 184 | return link_enter_configured(link); |
f882c247 | 185 | |
39032b87 | 186 | log_debug_link(link, "setting routes"); |
449f7554 | 187 | |
a6cc569e TG |
188 | LIST_FOREACH(static_routes, rt, link->network->static_routes) { |
189 | r = route_configure(rt, link, &route_handler); | |
dd3efc09 | 190 | if (r < 0) { |
3333d748 ZJS |
191 | log_warning_link(link, |
192 | "could not set routes: %s", strerror(-r)); | |
ef1ba606 TG |
193 | link_enter_failed(link); |
194 | return r; | |
dd3efc09 | 195 | } |
c166a070 | 196 | |
f5be5601 TG |
197 | link->route_messages ++; |
198 | } | |
199 | ||
5c1d3fc9 UTL |
200 | if (link->ipv4ll && !link->dhcp_lease) { |
201 | _cleanup_route_free_ Route *route = NULL; | |
202 | struct in_addr addr; | |
203 | ||
204 | r = sd_ipv4ll_get_address(link->ipv4ll, &addr); | |
205 | if (r < 0 && r != -ENOENT) { | |
206 | log_warning_link(link, "IPV4LL error: no address: %s", | |
207 | strerror(-r)); | |
208 | return r; | |
209 | } | |
210 | ||
211 | if (r != -ENOENT) { | |
212 | r = route_new_dynamic(&route); | |
213 | if (r < 0) { | |
214 | log_error_link(link, "Could not allocate route: %s", | |
215 | strerror(-r)); | |
216 | return r; | |
217 | } | |
218 | ||
219 | route->family = AF_INET; | |
220 | route->scope = RT_SCOPE_LINK; | |
221 | route->metrics = 99; | |
222 | ||
223 | r = route_configure(route, link, &route_handler); | |
224 | if (r < 0) { | |
225 | log_warning_link(link, | |
226 | "could not set routes: %s", strerror(-r)); | |
227 | link_enter_failed(link); | |
228 | return r; | |
229 | } | |
230 | ||
231 | link->route_messages ++; | |
232 | } | |
233 | } | |
234 | ||
a6cc569e TG |
235 | if (link->dhcp_lease) { |
236 | _cleanup_route_free_ Route *route = NULL; | |
9765ce69 | 237 | _cleanup_route_free_ Route *route_gw = NULL; |
a6cc569e TG |
238 | struct in_addr gateway; |
239 | ||
240 | r = sd_dhcp_lease_get_router(link->dhcp_lease, &gateway); | |
241 | if (r < 0) { | |
242 | log_warning_link(link, "DHCP error: no router: %s", | |
243 | strerror(-r)); | |
244 | return r; | |
245 | } | |
246 | ||
247 | r = route_new_dynamic(&route); | |
248 | if (r < 0) { | |
249 | log_error_link(link, "Could not allocate route: %s", | |
250 | strerror(-r)); | |
251 | return r; | |
252 | } | |
253 | ||
9765ce69 BP |
254 | r = route_new_dynamic(&route_gw); |
255 | if (r < 0) { | |
256 | log_error_link(link, "Could not allocate route: %s", | |
257 | strerror(-r)); | |
258 | return r; | |
259 | } | |
260 | ||
261 | /* The dhcp netmask may mask out the gateway. Add an explicit | |
262 | * route for the gw host so that we can route no matter the | |
263 | * netmask or existing kernel route tables. */ | |
264 | route_gw->family = AF_INET; | |
265 | route_gw->dst_addr.in = gateway; | |
266 | route_gw->dst_prefixlen = 32; | |
267 | route_gw->scope = RT_SCOPE_LINK; | |
268 | ||
269 | r = route_configure(route_gw, link, &route_handler); | |
270 | if (r < 0) { | |
271 | log_warning_link(link, | |
272 | "could not set host route: %s", strerror(-r)); | |
273 | return r; | |
274 | } | |
275 | ||
276 | link->route_messages ++; | |
277 | ||
a6cc569e TG |
278 | route->family = AF_INET; |
279 | route->in_addr.in = gateway; | |
280 | ||
281 | r = route_configure(route, link, &route_handler); | |
f5be5601 | 282 | if (r < 0) { |
3333d748 ZJS |
283 | log_warning_link(link, |
284 | "could not set routes: %s", strerror(-r)); | |
f5be5601 TG |
285 | link_enter_failed(link); |
286 | return r; | |
287 | } | |
288 | ||
289 | link->route_messages ++; | |
f882c247 TG |
290 | } |
291 | ||
292 | return 0; | |
293 | } | |
294 | ||
5c1d3fc9 UTL |
295 | static int route_drop_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { |
296 | Link *link = userdata; | |
297 | int r; | |
298 | ||
299 | assert(m); | |
300 | assert(link); | |
301 | assert(link->ifname); | |
302 | ||
303 | if (link->state == LINK_STATE_FAILED) | |
304 | return 1; | |
305 | ||
306 | r = sd_rtnl_message_get_errno(m); | |
307 | if (r < 0 && r != -ENOENT) | |
308 | log_struct_link(LOG_WARNING, link, | |
309 | "MESSAGE=%s: could not drop route: %s", | |
310 | link->ifname, strerror(-r), | |
311 | "ERRNO=%d", -r, | |
312 | NULL); | |
313 | ||
314 | return 0; | |
315 | } | |
316 | ||
f882c247 TG |
317 | static int address_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { |
318 | Link *link = userdata; | |
319 | int r; | |
320 | ||
f5be5601 TG |
321 | assert(m); |
322 | assert(link); | |
323 | assert(link->ifname); | |
324 | assert(link->addr_messages > 0); | |
ef1ba606 | 325 | assert(link->state == LINK_STATE_SETTING_ADDRESSES || link->state == LINK_STATE_FAILED); |
f882c247 | 326 | |
f5be5601 | 327 | link->addr_messages --; |
f882c247 TG |
328 | |
329 | if (link->state == LINK_STATE_FAILED) | |
330 | return 1; | |
331 | ||
332 | r = sd_rtnl_message_get_errno(m); | |
c166a070 | 333 | if (r < 0 && r != -EEXIST) |
c9ccc19f | 334 | log_struct_link(LOG_WARNING, link, |
3333d748 ZJS |
335 | "MESSAGE=%s: could not set address: %s", |
336 | link->ifname, strerror(-r), | |
337 | "ERRNO=%d", -r, | |
338 | NULL); | |
f882c247 | 339 | |
f5be5601 | 340 | if (link->addr_messages == 0) { |
39032b87 | 341 | log_debug_link(link, "addresses set"); |
ef1ba606 | 342 | link_enter_set_routes(link); |
dd3efc09 | 343 | } |
f882c247 TG |
344 | |
345 | return 1; | |
346 | } | |
347 | ||
348 | static int link_enter_set_addresses(Link *link) { | |
a6cc569e | 349 | Address *ad; |
f882c247 TG |
350 | int r; |
351 | ||
352 | assert(link); | |
353 | assert(link->network); | |
f5be5601 | 354 | assert(link->state != _LINK_STATE_INVALID); |
f882c247 | 355 | |
ef1ba606 | 356 | link->state = LINK_STATE_SETTING_ADDRESSES; |
f882c247 | 357 | |
5c1d3fc9 | 358 | if (!link->network->static_addresses && !link->dhcp_lease && |
aba496a5 | 359 | (!link->ipv4ll || ipv4ll_is_bound(link->ipv4ll) == false)) |
ef1ba606 | 360 | return link_enter_set_routes(link); |
f882c247 | 361 | |
39032b87 | 362 | log_debug_link(link, "setting addresses"); |
449f7554 | 363 | |
a6cc569e TG |
364 | LIST_FOREACH(static_addresses, ad, link->network->static_addresses) { |
365 | r = address_configure(ad, link, &address_handler); | |
dd3efc09 | 366 | if (r < 0) { |
3333d748 ZJS |
367 | log_warning_link(link, |
368 | "could not set addresses: %s", strerror(-r)); | |
ef1ba606 TG |
369 | link_enter_failed(link); |
370 | return r; | |
dd3efc09 | 371 | } |
c166a070 | 372 | |
f5be5601 TG |
373 | link->addr_messages ++; |
374 | } | |
375 | ||
5c1d3fc9 UTL |
376 | if (link->ipv4ll && !link->dhcp_lease) { |
377 | _cleanup_address_free_ Address *ll_addr = NULL; | |
378 | struct in_addr addr; | |
379 | ||
380 | r = sd_ipv4ll_get_address(link->ipv4ll, &addr); | |
381 | if (r < 0 && r != -ENOENT) { | |
382 | log_warning_link(link, "IPV4LL error: no address: %s", | |
383 | strerror(-r)); | |
384 | return r; | |
385 | } | |
386 | ||
387 | if (r != -ENOENT) { | |
388 | r = address_new_dynamic(&ll_addr); | |
389 | if (r < 0) { | |
390 | log_error_link(link, "Could not allocate address: %s", strerror(-r)); | |
391 | return r; | |
392 | } | |
393 | ||
394 | ll_addr->family = AF_INET; | |
395 | ll_addr->in_addr.in = addr; | |
396 | ll_addr->prefixlen = 16; | |
397 | ll_addr->broadcast.s_addr = ll_addr->in_addr.in.s_addr | htonl(0xfffffffflu >> ll_addr->prefixlen); | |
398 | ll_addr->scope = RT_SCOPE_LINK; | |
399 | ||
400 | r = address_configure(ll_addr, link, &address_handler); | |
401 | if (r < 0) { | |
402 | log_warning_link(link, | |
403 | "could not set addresses: %s", strerror(-r)); | |
404 | link_enter_failed(link); | |
405 | return r; | |
406 | } | |
407 | ||
408 | link->addr_messages ++; | |
409 | } | |
410 | } | |
411 | ||
a6cc569e TG |
412 | if (link->dhcp_lease) { |
413 | _cleanup_address_free_ Address *address = NULL; | |
414 | struct in_addr addr; | |
415 | struct in_addr netmask; | |
416 | unsigned prefixlen; | |
417 | ||
418 | r = sd_dhcp_lease_get_address(link->dhcp_lease, &addr); | |
419 | if (r < 0) { | |
420 | log_warning_link(link, "DHCP error: no address: %s", | |
421 | strerror(-r)); | |
422 | return r; | |
423 | } | |
424 | ||
425 | r = sd_dhcp_lease_get_netmask(link->dhcp_lease, &netmask); | |
426 | if (r < 0) { | |
427 | log_warning_link(link, "DHCP error: no netmask: %s", | |
428 | strerror(-r)); | |
429 | return r; | |
430 | } | |
431 | ||
432 | prefixlen = net_netmask_to_prefixlen(&netmask); | |
433 | ||
434 | r = address_new_dynamic(&address); | |
435 | if (r < 0) { | |
436 | log_error_link(link, "Could not allocate address: %s", | |
437 | strerror(-r)); | |
438 | return r; | |
439 | } | |
440 | ||
441 | address->family = AF_INET; | |
442 | address->in_addr.in = addr; | |
443 | address->prefixlen = prefixlen; | |
444 | address->broadcast.s_addr = addr.s_addr | ~netmask.s_addr; | |
445 | ||
446 | r = address_configure(address, link, &address_handler); | |
f5be5601 | 447 | if (r < 0) { |
3333d748 ZJS |
448 | log_warning_link(link, |
449 | "could not set addresses: %s", strerror(-r)); | |
f5be5601 TG |
450 | link_enter_failed(link); |
451 | return r; | |
452 | } | |
453 | ||
454 | link->addr_messages ++; | |
f882c247 TG |
455 | } |
456 | ||
457 | return 0; | |
458 | } | |
459 | ||
aba496a5 UTL |
460 | static int address_update_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { |
461 | Link *link = userdata; | |
462 | int r; | |
463 | ||
464 | assert(m); | |
465 | assert(link); | |
466 | assert(link->ifname); | |
467 | ||
468 | if (link->state == LINK_STATE_FAILED) | |
469 | return 1; | |
470 | ||
471 | r = sd_rtnl_message_get_errno(m); | |
472 | if (r < 0 && r != -ENOENT) | |
473 | log_struct_link(LOG_WARNING, link, | |
474 | "MESSAGE=%s: could not update address: %s", | |
475 | link->ifname, strerror(-r), | |
476 | "ERRNO=%d", -r, | |
477 | NULL); | |
478 | ||
479 | return 0; | |
480 | } | |
481 | ||
ff254138 TG |
482 | static int address_drop_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { |
483 | Link *link = userdata; | |
484 | int r; | |
485 | ||
486 | assert(m); | |
487 | assert(link); | |
488 | assert(link->ifname); | |
489 | ||
490 | if (link->state == LINK_STATE_FAILED) | |
491 | return 1; | |
492 | ||
493 | r = sd_rtnl_message_get_errno(m); | |
c9ccc19f TG |
494 | if (r < 0 && r != -ENOENT) |
495 | log_struct_link(LOG_WARNING, link, | |
496 | "MESSAGE=%s: could not drop address: %s", | |
497 | link->ifname, strerror(-r), | |
498 | "ERRNO=%d", -r, | |
499 | NULL); | |
ff254138 | 500 | |
5c1d3fc9 | 501 | return 0; |
ff254138 TG |
502 | } |
503 | ||
1346b1f0 TG |
504 | static int set_hostname_handler(sd_bus *bus, sd_bus_message *m, void *userdata, sd_bus_error *ret_error) { |
505 | int r; | |
506 | ||
507 | r = sd_bus_message_get_errno(m); | |
508 | if (r < 0) | |
509 | log_warning("Could not set hostname: %s", strerror(-r)); | |
510 | ||
511 | return 1; | |
512 | } | |
513 | ||
514 | static int set_hostname(sd_bus *bus, const char *hostname) { | |
515 | _cleanup_bus_message_unref_ sd_bus_message *m = NULL; | |
516 | int r = 0; | |
517 | ||
1346b1f0 TG |
518 | assert(hostname); |
519 | ||
520 | log_debug("Setting transient hostname: '%s'", hostname); | |
521 | ||
bcbca829 TG |
522 | if (!bus) { /* TODO: replace by assert when we can rely on kdbus */ |
523 | log_info("Not connected to system bus, ignoring transient hostname."); | |
524 | return 0; | |
525 | } | |
526 | ||
1346b1f0 TG |
527 | r = sd_bus_message_new_method_call( |
528 | bus, | |
151b9b96 | 529 | &m, |
1346b1f0 TG |
530 | "org.freedesktop.hostname1", |
531 | "/org/freedesktop/hostname1", | |
532 | "org.freedesktop.hostname1", | |
151b9b96 | 533 | "SetHostname"); |
1346b1f0 TG |
534 | if (r < 0) |
535 | return r; | |
536 | ||
537 | r = sd_bus_message_append(m, "sb", hostname, false); | |
538 | if (r < 0) | |
539 | return r; | |
540 | ||
541 | r = sd_bus_call_async(bus, m, set_hostname_handler, NULL, 0, NULL); | |
542 | if (r < 0) | |
543 | log_error("Could not set transient hostname: %s", strerror(-r)); | |
544 | ||
545 | return r; | |
546 | } | |
547 | ||
4f882b2a TG |
548 | static int set_mtu_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { |
549 | Link *link = userdata; | |
550 | int r; | |
551 | ||
552 | assert(m); | |
553 | assert(link); | |
554 | assert(link->ifname); | |
555 | ||
556 | if (link->state == LINK_STATE_FAILED) | |
557 | return 1; | |
558 | ||
559 | r = sd_rtnl_message_get_errno(m); | |
c9ccc19f TG |
560 | if (r < 0) |
561 | log_struct_link(LOG_WARNING, link, | |
562 | "MESSAGE=%s: could not set MTU: %s", | |
563 | link->ifname, strerror(-r), | |
564 | "ERRNO=%d", -r, | |
565 | NULL); | |
4f882b2a TG |
566 | |
567 | return 1; | |
568 | } | |
569 | ||
570 | static int link_set_mtu(Link *link, uint32_t mtu) { | |
cf6a8911 | 571 | _cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL; |
4f882b2a TG |
572 | int r; |
573 | ||
574 | assert(link); | |
575 | assert(link->manager); | |
576 | assert(link->manager->rtnl); | |
577 | ||
578 | log_debug_link(link, "setting MTU: %" PRIu32, mtu); | |
579 | ||
151b9b96 LP |
580 | r = sd_rtnl_message_new_link(link->manager->rtnl, &req, |
581 | RTM_SETLINK, link->ifindex); | |
4f882b2a TG |
582 | if (r < 0) { |
583 | log_error_link(link, "Could not allocate RTM_SETLINK message"); | |
584 | return r; | |
585 | } | |
586 | ||
587 | r = sd_rtnl_message_append_u32(req, IFLA_MTU, mtu); | |
588 | if (r < 0) { | |
589 | log_error_link(link, "Could not append MTU: %s", strerror(-r)); | |
590 | return r; | |
591 | } | |
592 | ||
593 | r = sd_rtnl_call_async(link->manager->rtnl, req, set_mtu_handler, link, 0, NULL); | |
594 | if (r < 0) { | |
595 | log_error_link(link, | |
596 | "Could not send rtnetlink message: %s", strerror(-r)); | |
597 | return r; | |
598 | } | |
599 | ||
600 | return 0; | |
601 | } | |
602 | ||
a6cc569e TG |
603 | static int dhcp_lease_lost(Link *link) { |
604 | _cleanup_address_free_ Address *address = NULL; | |
3e790eae UTL |
605 | _cleanup_route_free_ Route *route_gw = NULL; |
606 | _cleanup_route_free_ Route *route = NULL; | |
a6cc569e TG |
607 | struct in_addr addr; |
608 | struct in_addr netmask; | |
3e790eae | 609 | struct in_addr gateway; |
a6cc569e | 610 | unsigned prefixlen; |
ff254138 TG |
611 | int r; |
612 | ||
613 | assert(link); | |
a6cc569e | 614 | assert(link->dhcp_lease); |
ff254138 | 615 | |
14efd761 TG |
616 | log_warning_link(link, "DHCP lease lost"); |
617 | ||
a6cc569e TG |
618 | r = address_new_dynamic(&address); |
619 | if (r >= 0) { | |
620 | sd_dhcp_lease_get_address(link->dhcp_lease, &addr); | |
621 | sd_dhcp_lease_get_netmask(link->dhcp_lease, &netmask); | |
3e790eae | 622 | sd_dhcp_lease_get_router(link->dhcp_lease, &gateway); |
a6cc569e | 623 | prefixlen = net_netmask_to_prefixlen(&netmask); |
ff254138 | 624 | |
3e790eae UTL |
625 | r = route_new_dynamic(&route_gw); |
626 | if (r >= 0) { | |
627 | route_gw->family = AF_INET; | |
628 | route_gw->dst_addr.in = gateway; | |
629 | route_gw->dst_prefixlen = 32; | |
630 | route_gw->scope = RT_SCOPE_LINK; | |
631 | ||
632 | route_drop(route_gw, link, &route_drop_handler); | |
633 | } | |
634 | ||
635 | r = route_new_dynamic(&route); | |
636 | if (r >= 0) { | |
637 | route->family = AF_INET; | |
638 | route->in_addr.in = gateway; | |
639 | ||
640 | route_drop(route, link, &route_drop_handler); | |
641 | } | |
642 | ||
a6cc569e TG |
643 | address->family = AF_INET; |
644 | address->in_addr.in = addr; | |
645 | address->prefixlen = prefixlen; | |
ff254138 | 646 | |
5c1d3fc9 | 647 | address_drop(address, link, &address_drop_handler); |
c07aeadf | 648 | } |
eb27aeca | 649 | |
c07aeadf TG |
650 | if (link->network->dhcp_mtu) { |
651 | uint16_t mtu; | |
ff254138 | 652 | |
a6cc569e | 653 | r = sd_dhcp_lease_get_mtu(link->dhcp_lease, &mtu); |
c07aeadf TG |
654 | if (r >= 0 && link->original_mtu != mtu) { |
655 | r = link_set_mtu(link, link->original_mtu); | |
656 | if (r < 0) { | |
657 | log_warning_link(link, "DHCP error: could not reset MTU"); | |
658 | link_enter_failed(link); | |
659 | return r; | |
660 | } | |
ff254138 | 661 | } |
c07aeadf | 662 | } |
ff254138 | 663 | |
c07aeadf | 664 | if (link->network->dhcp_hostname) { |
216816c6 TG |
665 | const char *hostname = NULL; |
666 | ||
667 | r = sd_dhcp_lease_get_hostname(link->dhcp_lease, &hostname); | |
668 | if (r >= 0 && hostname) { | |
669 | r = set_hostname(link->manager->bus, ""); | |
670 | if (r < 0) | |
671 | log_error("Failed to reset transient hostname"); | |
672 | } | |
c07aeadf | 673 | } |
4f882b2a | 674 | |
a6cc569e TG |
675 | link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease); |
676 | ||
c07aeadf TG |
677 | return 0; |
678 | } | |
4f882b2a | 679 | |
c07aeadf | 680 | static int dhcp_lease_acquired(sd_dhcp_client *client, Link *link) { |
a6cc569e | 681 | sd_dhcp_lease *lease; |
c07aeadf TG |
682 | struct in_addr address; |
683 | struct in_addr netmask; | |
684 | struct in_addr gateway; | |
685 | unsigned prefixlen; | |
c07aeadf TG |
686 | struct in_addr *nameservers; |
687 | size_t nameservers_size; | |
688 | int r; | |
1346b1f0 | 689 | |
c07aeadf TG |
690 | assert(client); |
691 | assert(link); | |
ff254138 | 692 | |
a6cc569e TG |
693 | r = sd_dhcp_client_get_lease(client, &lease); |
694 | if (r < 0) { | |
695 | log_warning_link(link, "DHCP error: no lease: %s", | |
696 | strerror(-r)); | |
697 | return r; | |
698 | } | |
699 | ||
700 | r = sd_dhcp_lease_get_address(lease, &address); | |
ff254138 | 701 | if (r < 0) { |
c07aeadf TG |
702 | log_warning_link(link, "DHCP error: no address: %s", |
703 | strerror(-r)); | |
704 | return r; | |
ff254138 TG |
705 | } |
706 | ||
a6cc569e | 707 | r = sd_dhcp_lease_get_netmask(lease, &netmask); |
ff254138 | 708 | if (r < 0) { |
c07aeadf TG |
709 | log_warning_link(link, "DHCP error: no netmask: %s", |
710 | strerror(-r)); | |
711 | return r; | |
ff254138 TG |
712 | } |
713 | ||
377a218f | 714 | prefixlen = net_netmask_to_prefixlen(&netmask); |
ff254138 | 715 | |
a6cc569e | 716 | r = sd_dhcp_lease_get_router(lease, &gateway); |
ff254138 | 717 | if (r < 0) { |
c07aeadf TG |
718 | log_warning_link(link, "DHCP error: no router: %s", |
719 | strerror(-r)); | |
720 | return r; | |
ff254138 TG |
721 | } |
722 | ||
c07aeadf TG |
723 | log_struct_link(LOG_INFO, link, |
724 | "MESSAGE=%s: DHCPv4 address %u.%u.%u.%u/%u via %u.%u.%u.%u", | |
725 | link->ifname, | |
726 | ADDRESS_FMT_VAL(address), | |
727 | prefixlen, | |
728 | ADDRESS_FMT_VAL(gateway), | |
729 | "ADDRESS=%u.%u.%u.%u", | |
730 | ADDRESS_FMT_VAL(address), | |
731 | "PREFIXLEN=%u", | |
732 | prefixlen, | |
733 | "GATEWAY=%u.%u.%u.%u", | |
734 | ADDRESS_FMT_VAL(gateway), | |
735 | NULL); | |
736 | ||
d50cf59b TG |
737 | link->dhcp_lease = lease; |
738 | ||
c07aeadf | 739 | if (link->network->dhcp_dns) { |
a6cc569e | 740 | r = sd_dhcp_lease_get_dns(lease, &nameservers, &nameservers_size); |
c07aeadf TG |
741 | if (r >= 0) { |
742 | r = manager_update_resolv_conf(link->manager); | |
743 | if (r < 0) | |
744 | log_error("Failed to update resolv.conf"); | |
ff254138 | 745 | } |
c07aeadf | 746 | } |
ff254138 | 747 | |
c07aeadf TG |
748 | if (link->network->dhcp_mtu) { |
749 | uint16_t mtu; | |
750 | ||
a6cc569e | 751 | r = sd_dhcp_lease_get_mtu(lease, &mtu); |
c07aeadf TG |
752 | if (r >= 0) { |
753 | r = link_set_mtu(link, mtu); | |
754 | if (r < 0) | |
755 | log_error_link(link, "Failed to set MTU " | |
756 | "to %" PRIu16, mtu); | |
757 | } | |
758 | } | |
ff254138 | 759 | |
c07aeadf TG |
760 | if (link->network->dhcp_hostname) { |
761 | const char *hostname; | |
ff254138 | 762 | |
a6cc569e | 763 | r = sd_dhcp_lease_get_hostname(lease, &hostname); |
c07aeadf TG |
764 | if (r >= 0) { |
765 | r = set_hostname(link->manager->bus, hostname); | |
766 | if (r < 0) | |
767 | log_error("Failed to set transient hostname " | |
768 | "to '%s'", hostname); | |
3bef724f | 769 | } |
c07aeadf | 770 | } |
3bef724f | 771 | |
c07aeadf TG |
772 | link_enter_set_addresses(link); |
773 | ||
774 | return 0; | |
775 | } | |
776 | ||
777 | static void dhcp_handler(sd_dhcp_client *client, int event, void *userdata) { | |
778 | Link *link = userdata; | |
aba496a5 | 779 | int r = 0; |
c07aeadf TG |
780 | |
781 | assert(link); | |
782 | assert(link->network); | |
783 | assert(link->manager); | |
784 | ||
785 | if (link->state == LINK_STATE_FAILED) | |
786 | return; | |
787 | ||
788 | switch (event) { | |
789 | case DHCP_EVENT_NO_LEASE: | |
790 | log_debug_link(link, "IP address in use."); | |
791 | break; | |
792 | case DHCP_EVENT_EXPIRED: | |
793 | case DHCP_EVENT_STOP: | |
794 | case DHCP_EVENT_IP_CHANGE: | |
795 | if (link->network->dhcp_critical) { | |
796 | log_error_link(link, "DHCPv4 connection considered system critical, " | |
797 | "ignoring request to reconfigure it."); | |
798 | return; | |
4f882b2a | 799 | } |
4f882b2a | 800 | |
17256461 UTL |
801 | if (link->dhcp_lease) { |
802 | r = dhcp_lease_lost(link); | |
803 | if (r < 0) { | |
804 | link_enter_failed(link); | |
805 | return; | |
806 | } | |
c07aeadf | 807 | } |
1346b1f0 | 808 | |
c07aeadf TG |
809 | if (event == DHCP_EVENT_IP_CHANGE) { |
810 | r = dhcp_lease_acquired(client, link); | |
811 | if (r < 0) { | |
812 | link_enter_failed(link); | |
813 | return; | |
814 | } | |
1346b1f0 | 815 | } |
1346b1f0 | 816 | |
5c1d3fc9 | 817 | if (event == DHCP_EVENT_EXPIRED && link->network->ipv4ll) { |
aba496a5 UTL |
818 | if (!sd_ipv4ll_is_running(link->ipv4ll)) |
819 | r = sd_ipv4ll_start(link->ipv4ll); | |
820 | else if (ipv4ll_is_bound(link->ipv4ll)) | |
821 | r = ipv4ll_address_update(link, false); | |
5c1d3fc9 UTL |
822 | if (r < 0) { |
823 | link_enter_failed(link); | |
824 | return; | |
825 | } | |
826 | } | |
827 | ||
c07aeadf TG |
828 | break; |
829 | case DHCP_EVENT_IP_ACQUIRE: | |
830 | r = dhcp_lease_acquired(client, link); | |
831 | if (r < 0) { | |
832 | link_enter_failed(link); | |
833 | return; | |
834 | } | |
5c1d3fc9 | 835 | if (link->ipv4ll) { |
aba496a5 UTL |
836 | if (ipv4ll_is_bound(link->ipv4ll)) |
837 | r = ipv4ll_address_update(link, true); | |
838 | else | |
839 | r = sd_ipv4ll_stop(link->ipv4ll); | |
5c1d3fc9 UTL |
840 | if (r < 0) { |
841 | link_enter_failed(link); | |
842 | return; | |
843 | } | |
844 | } | |
c07aeadf TG |
845 | break; |
846 | default: | |
847 | if (event < 0) | |
848 | log_warning_link(link, "DHCP error: %s", strerror(-event)); | |
849 | else | |
850 | log_warning_link(link, "DHCP unknown event: %d", event); | |
c07aeadf | 851 | break; |
ff254138 TG |
852 | } |
853 | ||
854 | return; | |
855 | } | |
856 | ||
aba496a5 UTL |
857 | static int ipv4ll_address_update(Link *link, bool deprecate) { |
858 | int r; | |
859 | struct in_addr addr; | |
860 | ||
861 | assert(link); | |
862 | ||
863 | r = sd_ipv4ll_get_address(link->ipv4ll, &addr); | |
864 | if (r >= 0) { | |
865 | _cleanup_address_free_ Address *address = NULL; | |
866 | ||
867 | log_debug_link(link, "IPv4 link-local %s %u.%u.%u.%u", | |
868 | deprecate ? "deprecate" : "approve", | |
869 | ADDRESS_FMT_VAL(addr)); | |
870 | ||
871 | r = address_new_dynamic(&address); | |
872 | if (r < 0) { | |
873 | log_error_link(link, "Could not allocate address: %s", strerror(-r)); | |
874 | return r; | |
875 | } | |
876 | ||
877 | address->family = AF_INET; | |
878 | address->in_addr.in = addr; | |
879 | address->prefixlen = 16; | |
880 | address->scope = RT_SCOPE_LINK; | |
881 | address->cinfo.ifa_prefered = deprecate ? 0 : CACHE_INFO_INFINITY_LIFE_TIME; | |
882 | address->broadcast.s_addr = address->in_addr.in.s_addr | htonl(0xfffffffflu >> address->prefixlen); | |
883 | ||
884 | address_update(address, link, &address_update_handler); | |
885 | } | |
886 | ||
887 | return 0; | |
888 | ||
889 | } | |
890 | ||
891 | static int ipv4ll_address_lost(Link *link) { | |
5c1d3fc9 UTL |
892 | int r; |
893 | struct in_addr addr; | |
894 | ||
5c1d3fc9 UTL |
895 | assert(link); |
896 | ||
897 | r = sd_ipv4ll_get_address(link->ipv4ll, &addr); | |
898 | if (r >= 0) { | |
899 | _cleanup_address_free_ Address *address = NULL; | |
900 | _cleanup_route_free_ Route *route = NULL; | |
901 | ||
902 | log_debug_link(link, "IPv4 link-local release %u.%u.%u.%u", | |
903 | ADDRESS_FMT_VAL(addr)); | |
904 | ||
905 | r = address_new_dynamic(&address); | |
906 | if (r < 0) { | |
907 | log_error_link(link, "Could not allocate address: %s", strerror(-r)); | |
908 | return r; | |
909 | } | |
910 | ||
911 | address->family = AF_INET; | |
912 | address->in_addr.in = addr; | |
913 | address->prefixlen = 16; | |
914 | address->scope = RT_SCOPE_LINK; | |
915 | ||
916 | address_drop(address, link, &address_drop_handler); | |
917 | ||
918 | r = route_new_dynamic(&route); | |
919 | if (r < 0) { | |
920 | log_error_link(link, "Could not allocate route: %s", | |
921 | strerror(-r)); | |
922 | return r; | |
923 | } | |
924 | ||
925 | route->family = AF_INET; | |
926 | route->scope = RT_SCOPE_LINK; | |
927 | route->metrics = 99; | |
928 | ||
929 | route_drop(route, link, &route_drop_handler); | |
930 | } | |
931 | ||
932 | return 0; | |
933 | } | |
934 | ||
aba496a5 UTL |
935 | static bool ipv4ll_is_bound(sd_ipv4ll *ll) { |
936 | int r; | |
937 | struct in_addr addr; | |
938 | ||
939 | assert(ll); | |
940 | ||
941 | r = sd_ipv4ll_get_address(ll, &addr); | |
942 | if (r < 0) | |
943 | return false; | |
944 | return true; | |
945 | } | |
946 | ||
5c1d3fc9 UTL |
947 | static int ipv4ll_address_claimed(sd_ipv4ll *ll, Link *link) { |
948 | struct in_addr address; | |
949 | int r; | |
950 | ||
951 | assert(ll); | |
952 | assert(link); | |
953 | ||
954 | r = sd_ipv4ll_get_address(ll, &address); | |
955 | if (r < 0) | |
956 | return r; | |
957 | ||
958 | log_struct_link(LOG_INFO, link, | |
959 | "MESSAGE=%s: IPv4 link-local address %u.%u.%u.%u", | |
960 | link->ifname, | |
961 | ADDRESS_FMT_VAL(address), | |
962 | NULL); | |
963 | ||
964 | link_enter_set_addresses(link); | |
965 | ||
966 | return 0; | |
967 | } | |
968 | ||
969 | static void ipv4ll_handler(sd_ipv4ll *ll, int event, void *userdata){ | |
970 | Link *link = userdata; | |
971 | int r; | |
972 | ||
973 | assert(link); | |
974 | assert(link->network); | |
975 | assert(link->manager); | |
976 | ||
977 | switch(event) { | |
978 | case IPV4LL_EVENT_STOP: | |
979 | case IPV4LL_EVENT_CONFLICT: | |
aba496a5 | 980 | r = ipv4ll_address_lost(link); |
5c1d3fc9 UTL |
981 | if (r < 0) { |
982 | link_enter_failed(link); | |
983 | return; | |
984 | } | |
985 | break; | |
986 | case IPV4LL_EVENT_BIND: | |
987 | r = ipv4ll_address_claimed(ll, link); | |
988 | if (r < 0) { | |
989 | link_enter_failed(link); | |
990 | return; | |
991 | } | |
992 | break; | |
993 | default: | |
994 | if (event < 0) | |
995 | log_warning_link(link, "IPv4 link-local error: %s", strerror(-event)); | |
996 | else | |
997 | log_warning_link(link, "IPv4 link-local unknown event: %d", event); | |
998 | break; | |
999 | } | |
1000 | } | |
1001 | ||
ff254138 TG |
1002 | static int link_acquire_conf(Link *link) { |
1003 | int r; | |
1004 | ||
1005 | assert(link); | |
1006 | assert(link->network); | |
ff254138 TG |
1007 | assert(link->manager); |
1008 | assert(link->manager->event); | |
1009 | ||
5c1d3fc9 | 1010 | if (link->network->ipv4ll) { |
eb34d4af | 1011 | assert(link->ipv4ll); |
ff254138 | 1012 | |
5c1d3fc9 UTL |
1013 | log_debug_link(link, "acquiring IPv4 link-local address"); |
1014 | ||
1015 | r = sd_ipv4ll_start(link->ipv4ll); | |
ff254138 TG |
1016 | if (r < 0) |
1017 | return r; | |
5c1d3fc9 UTL |
1018 | } |
1019 | ||
1020 | if (link->network->dhcp) { | |
eb34d4af | 1021 | assert(link->dhcp_client); |
ff254138 | 1022 | |
5c1d3fc9 | 1023 | log_debug_link(link, "acquiring DHCPv4 lease"); |
ab47d620 | 1024 | |
5c1d3fc9 UTL |
1025 | r = sd_dhcp_client_start(link->dhcp_client); |
1026 | if (r < 0) | |
1027 | return r; | |
1028 | } | |
ff254138 TG |
1029 | |
1030 | return 0; | |
1031 | } | |
1032 | ||
1033 | static int link_update_flags(Link *link, unsigned flags) { | |
1034 | int r; | |
1035 | ||
1036 | assert(link); | |
1037 | assert(link->network); | |
1038 | ||
1039 | if (link->state == LINK_STATE_FAILED) | |
1040 | return 0; | |
1041 | ||
a748b692 | 1042 | if (link->flags == flags) |
efbc88b8 | 1043 | return 0; |
efbc88b8 | 1044 | |
c49b33ac TG |
1045 | log_debug_link(link, "link status updated: %#.8x -> %#.8x", |
1046 | link->flags, flags); | |
1047 | ||
3333d748 ZJS |
1048 | if ((link->flags & IFF_UP) != (flags & IFF_UP)) |
1049 | log_info_link(link, | |
e6674986 | 1050 | "link is %s", flags & IFF_UP ? "up": "down"); |
efbc88b8 TG |
1051 | |
1052 | if ((link->flags & IFF_LOWER_UP) != (flags & IFF_LOWER_UP)) { | |
1053 | if (flags & IFF_LOWER_UP) { | |
39032b87 | 1054 | log_info_link(link, "carrier on"); |
efbc88b8 | 1055 | |
5c1d3fc9 | 1056 | if (link->network->dhcp || link->network->ipv4ll) { |
efbc88b8 TG |
1057 | r = link_acquire_conf(link); |
1058 | if (r < 0) { | |
5c1d3fc9 | 1059 | log_warning_link(link, "Could not acquire configuration: %s", strerror(-r)); |
efbc88b8 TG |
1060 | link_enter_failed(link); |
1061 | return r; | |
1062 | } | |
ff254138 | 1063 | } |
efbc88b8 | 1064 | } else { |
39032b87 | 1065 | log_info_link(link, "carrier off"); |
efbc88b8 TG |
1066 | |
1067 | if (link->network->dhcp) { | |
a6cc569e | 1068 | r = sd_dhcp_client_stop(link->dhcp_client); |
efbc88b8 | 1069 | if (r < 0) { |
1f6d9bc9 | 1070 | log_warning_link(link, "Could not stop DHCPv4 client: %s", strerror(-r)); |
efbc88b8 TG |
1071 | link_enter_failed(link); |
1072 | return r; | |
1073 | } | |
ff254138 | 1074 | } |
5c1d3fc9 UTL |
1075 | |
1076 | if (link->network->ipv4ll) { | |
1077 | r = sd_ipv4ll_stop(link->ipv4ll); | |
1078 | if (r < 0) { | |
1079 | log_warning_link(link, "Could not stop IPv4 link-local: %s", strerror(-r)); | |
1080 | link_enter_failed(link); | |
1081 | return r; | |
1082 | } | |
1083 | } | |
ff254138 TG |
1084 | } |
1085 | } | |
1086 | ||
1087 | link->flags = flags; | |
1088 | ||
1089 | return 0; | |
1090 | } | |
1091 | ||
dd3efc09 TG |
1092 | static int link_up_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { |
1093 | Link *link = userdata; | |
1094 | int r; | |
1095 | ||
1746cf2a TG |
1096 | assert(link); |
1097 | ||
1098 | if (link->state == LINK_STATE_FAILED) | |
1099 | return 1; | |
1100 | ||
dd3efc09 | 1101 | r = sd_rtnl_message_get_errno(m); |
58b12917 ZJS |
1102 | if (r >= 0) |
1103 | link_update_flags(link, link->flags | IFF_UP); | |
1104 | else | |
76800848 | 1105 | log_struct_link(LOG_WARNING, link, |
c9ccc19f TG |
1106 | "MESSAGE=%s: could not bring up interface: %s", |
1107 | link->ifname, strerror(-r), | |
1108 | "ERRNO=%d", -r, | |
1109 | NULL); | |
f882c247 TG |
1110 | return 1; |
1111 | } | |
1112 | ||
1113 | static int link_up(Link *link) { | |
cf6a8911 | 1114 | _cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL; |
f579559b TG |
1115 | int r; |
1116 | ||
f882c247 TG |
1117 | assert(link); |
1118 | assert(link->manager); | |
1119 | assert(link->manager->rtnl); | |
1120 | ||
39032b87 | 1121 | log_debug_link(link, "bringing link up"); |
449f7554 | 1122 | |
151b9b96 LP |
1123 | r = sd_rtnl_message_new_link(link->manager->rtnl, &req, |
1124 | RTM_SETLINK, link->ifindex); | |
f579559b | 1125 | if (r < 0) { |
39032b87 | 1126 | log_error_link(link, "Could not allocate RTM_SETLINK message"); |
f579559b TG |
1127 | return r; |
1128 | } | |
1129 | ||
5d4795f3 | 1130 | r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP); |
fc25d7f8 | 1131 | if (r < 0) { |
3333d748 | 1132 | log_error_link(link, "Could not set link flags: %s", strerror(-r)); |
fc25d7f8 TG |
1133 | return r; |
1134 | } | |
1135 | ||
dd3efc09 | 1136 | r = sd_rtnl_call_async(link->manager->rtnl, req, link_up_handler, link, 0, NULL); |
f579559b | 1137 | if (r < 0) { |
3333d748 ZJS |
1138 | log_error_link(link, |
1139 | "Could not send rtnetlink message: %s", strerror(-r)); | |
f579559b TG |
1140 | return r; |
1141 | } | |
1142 | ||
f882c247 TG |
1143 | return 0; |
1144 | } | |
1145 | ||
52433f6b | 1146 | static int link_enslaved(Link *link) { |
f882c247 TG |
1147 | int r; |
1148 | ||
ef1ba606 | 1149 | assert(link); |
52433f6b | 1150 | assert(link->state == LINK_STATE_ENSLAVING); |
f5be5601 | 1151 | assert(link->network); |
dd3efc09 | 1152 | |
f882c247 | 1153 | r = link_up(link); |
ef1ba606 TG |
1154 | if (r < 0) { |
1155 | link_enter_failed(link); | |
1156 | return r; | |
1157 | } | |
f882c247 | 1158 | |
5c1d3fc9 | 1159 | if (!link->network->dhcp && !link->network->ipv4ll) |
1746cf2a | 1160 | return link_enter_set_addresses(link); |
ef1ba606 TG |
1161 | |
1162 | return 0; | |
02b59d57 TG |
1163 | } |
1164 | ||
52433f6b | 1165 | static int enslave_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { |
02b59d57 TG |
1166 | Link *link = userdata; |
1167 | int r; | |
1168 | ||
1746cf2a | 1169 | assert(link); |
52433f6b | 1170 | assert(link->state == LINK_STATE_ENSLAVING || link->state == LINK_STATE_FAILED); |
ef1ba606 | 1171 | assert(link->network); |
02b59d57 | 1172 | |
52433f6b TG |
1173 | link->enslaving --; |
1174 | ||
02b59d57 TG |
1175 | if (link->state == LINK_STATE_FAILED) |
1176 | return 1; | |
1177 | ||
1178 | r = sd_rtnl_message_get_errno(m); | |
ef1ba606 | 1179 | if (r < 0) { |
c9ccc19f TG |
1180 | log_struct_link(LOG_ERR, link, |
1181 | "MESSAGE=%s: could not enslave: %s", | |
1182 | link->ifname, strerror(-r), | |
1183 | "ERRNO=%d", -r, | |
1184 | NULL); | |
ef1ba606 TG |
1185 | link_enter_failed(link); |
1186 | return 1; | |
3333d748 | 1187 | } |
02b59d57 | 1188 | |
52433f6b | 1189 | log_debug_link(link, "enslaved"); |
ab47d620 | 1190 | |
52433f6b TG |
1191 | if (link->enslaving == 0) |
1192 | link_enslaved(link); | |
02b59d57 TG |
1193 | |
1194 | return 1; | |
1195 | } | |
1196 | ||
52433f6b | 1197 | static int link_enter_enslave(Link *link) { |
fe6b2d55 | 1198 | NetDev *vlan, *macvlan; |
672682a6 | 1199 | Iterator i; |
02b59d57 TG |
1200 | int r; |
1201 | ||
1202 | assert(link); | |
1203 | assert(link->network); | |
ef1ba606 | 1204 | assert(link->state == _LINK_STATE_INVALID); |
02b59d57 | 1205 | |
52433f6b | 1206 | link->state = LINK_STATE_ENSLAVING; |
02b59d57 | 1207 | |
fe8db0c5 TG |
1208 | link_save(link); |
1209 | ||
63ffa720 | 1210 | if (!link->network->bridge && !link->network->bond && |
fe6b2d55 TG |
1211 | hashmap_isempty(link->network->vlans) && |
1212 | hashmap_isempty(link->network->macvlans)) | |
52433f6b | 1213 | return link_enslaved(link); |
02b59d57 | 1214 | |
52433f6b TG |
1215 | if (link->network->bridge) { |
1216 | log_struct_link(LOG_DEBUG, link, | |
1217 | "MESSAGE=%s: enslaving by '%s'", | |
c9ccc19f | 1218 | link->ifname, link->network->bridge->name, |
52433f6b TG |
1219 | NETDEV(link->network->bridge), |
1220 | NULL); | |
449f7554 | 1221 | |
52433f6b TG |
1222 | r = netdev_enslave(link->network->bridge, link, &enslave_handler); |
1223 | if (r < 0) { | |
1224 | log_struct_link(LOG_WARNING, link, | |
1225 | "MESSAGE=%s: could not enslave by '%s': %s", | |
c9ccc19f | 1226 | link->ifname, link->network->bridge->name, strerror(-r), |
52433f6b TG |
1227 | NETDEV(link->network->bridge), |
1228 | NULL); | |
1229 | link_enter_failed(link); | |
1230 | return r; | |
1231 | } | |
1232 | ||
0ad6148e MO |
1233 | link->enslaving ++; |
1234 | } | |
1235 | ||
1236 | if (link->network->bond) { | |
1237 | log_struct_link(LOG_DEBUG, link, | |
1238 | "MESSAGE=%s: enslaving by '%s'", | |
1239 | link->ifname, link->network->bond->name, | |
1240 | NETDEV(link->network->bond), | |
1241 | NULL); | |
1242 | ||
1243 | r = netdev_enslave(link->network->bond, link, &enslave_handler); | |
1244 | if (r < 0) { | |
1245 | log_struct_link(LOG_WARNING, link, | |
1246 | "MESSAGE=%s: could not enslave by '%s': %s", | |
1247 | link->ifname, link->network->bond->name, strerror(-r), | |
1248 | NETDEV(link->network->bond), | |
1249 | NULL); | |
1250 | link_enter_failed(link); | |
1251 | return r; | |
1252 | } | |
1253 | ||
52433f6b TG |
1254 | link->enslaving ++; |
1255 | } | |
1256 | ||
672682a6 | 1257 | HASHMAP_FOREACH(vlan, link->network->vlans, i) { |
52433f6b TG |
1258 | log_struct_link(LOG_DEBUG, link, |
1259 | "MESSAGE=%s: enslaving by '%s'", | |
672682a6 | 1260 | link->ifname, vlan->name, NETDEV(vlan), NULL); |
52433f6b | 1261 | |
672682a6 | 1262 | r = netdev_enslave(vlan, link, &enslave_handler); |
52433f6b TG |
1263 | if (r < 0) { |
1264 | log_struct_link(LOG_WARNING, link, | |
1265 | "MESSAGE=%s: could not enslave by '%s': %s", | |
672682a6 TG |
1266 | link->ifname, vlan->name, strerror(-r), |
1267 | NETDEV(vlan), NULL); | |
52433f6b TG |
1268 | link_enter_failed(link); |
1269 | return r; | |
1270 | } | |
1271 | ||
1272 | link->enslaving ++; | |
ef1ba606 TG |
1273 | } |
1274 | ||
fe6b2d55 TG |
1275 | HASHMAP_FOREACH(macvlan, link->network->macvlans, i) { |
1276 | log_struct_link(LOG_DEBUG, link, | |
1277 | "MESSAGE=%s: enslaving by '%s'", | |
1278 | link->ifname, macvlan->name, NETDEV(macvlan), NULL); | |
1279 | ||
1280 | r = netdev_enslave(macvlan, link, &enslave_handler); | |
1281 | if (r < 0) { | |
1282 | log_struct_link(LOG_WARNING, link, | |
1283 | "MESSAGE=%s: could not enslave by '%s': %s", | |
1284 | link->ifname, macvlan->name, strerror(-r), | |
1285 | NETDEV(macvlan), NULL); | |
1286 | link_enter_failed(link); | |
1287 | return r; | |
1288 | } | |
1289 | ||
1290 | link->enslaving ++; | |
1291 | } | |
1292 | ||
ef1ba606 TG |
1293 | return 0; |
1294 | } | |
1295 | ||
11a7f229 TG |
1296 | static int link_getlink_handler(sd_rtnl *rtnl, sd_rtnl_message *m, |
1297 | void *userdata) { | |
ef1ba606 TG |
1298 | Link *link = userdata; |
1299 | int r; | |
1300 | ||
1746cf2a | 1301 | assert(link); |
7ff8f4b5 | 1302 | assert(link->ifname); |
1746cf2a TG |
1303 | |
1304 | if (link->state == LINK_STATE_FAILED) | |
1305 | return 1; | |
1306 | ||
ef1ba606 TG |
1307 | r = sd_rtnl_message_get_errno(m); |
1308 | if (r < 0) { | |
c9ccc19f TG |
1309 | log_struct_link(LOG_ERR, link, |
1310 | "MESSAGE=%s: could not get state: %s", | |
1311 | link->ifname, strerror(-r), | |
1312 | "ERRNO=%d", -r, | |
1313 | NULL); | |
ef1ba606 | 1314 | link_enter_failed(link); |
c9ccc19f | 1315 | return 1; |
ef1ba606 TG |
1316 | } |
1317 | ||
5eb036ca TG |
1318 | link_update(link, m); |
1319 | ||
ef1ba606 TG |
1320 | return 1; |
1321 | } | |
1322 | ||
11a7f229 | 1323 | static int link_getlink(Link *link) { |
cf6a8911 | 1324 | _cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL; |
ef1ba606 TG |
1325 | int r; |
1326 | ||
1327 | assert(link); | |
1328 | assert(link->manager); | |
1329 | assert(link->manager->rtnl); | |
1330 | ||
39032b87 | 1331 | log_debug_link(link, "requesting link status"); |
449f7554 | 1332 | |
151b9b96 LP |
1333 | r = sd_rtnl_message_new_link(link->manager->rtnl, &req, |
1334 | RTM_GETLINK, link->ifindex); | |
ef1ba606 | 1335 | if (r < 0) { |
39032b87 | 1336 | log_error_link(link, "Could not allocate RTM_GETLINK message"); |
ef1ba606 TG |
1337 | return r; |
1338 | } | |
1339 | ||
11a7f229 TG |
1340 | r = sd_rtnl_call_async(link->manager->rtnl, req, link_getlink_handler, |
1341 | link, 0, NULL); | |
ef1ba606 | 1342 | if (r < 0) { |
3333d748 ZJS |
1343 | log_error_link(link, |
1344 | "Could not send rtnetlink message: %s", strerror(-r)); | |
ef1ba606 | 1345 | return r; |
dd3efc09 | 1346 | } |
02b59d57 TG |
1347 | |
1348 | return 0; | |
1349 | } | |
1350 | ||
a748b692 | 1351 | static int link_configure(Link *link) { |
02b59d57 TG |
1352 | int r; |
1353 | ||
ef1ba606 | 1354 | assert(link); |
ef1ba606 TG |
1355 | assert(link->state == _LINK_STATE_INVALID); |
1356 | ||
11a7f229 | 1357 | r = link_getlink(link); |
a748b692 | 1358 | if (r < 0) |
ef1ba606 | 1359 | return r; |
dd3efc09 | 1360 | |
52433f6b | 1361 | return link_enter_enslave(link); |
f579559b | 1362 | } |
dd3efc09 | 1363 | |
a748b692 TG |
1364 | int link_add(Manager *m, struct udev_device *device, Link **ret) { |
1365 | Link *link = NULL; | |
1366 | Network *network; | |
1367 | int r; | |
1368 | ||
1369 | assert(m); | |
1370 | assert(device); | |
1371 | ||
1372 | r = link_new(m, device, &link); | |
1373 | if (r < 0) | |
1374 | return r; | |
1375 | ||
1376 | *ret = link; | |
1377 | ||
1378 | r = network_get(m, device, &network); | |
1379 | if (r < 0) | |
1380 | return r == -ENOENT ? 0 : r; | |
1381 | ||
1382 | r = network_apply(m, network, link); | |
1383 | if (r < 0) | |
1384 | return r; | |
1385 | ||
eb34d4af | 1386 | if (link->network->ipv4ll) { |
b5db00e5 | 1387 | uint8_t seed[8]; |
eb34d4af TG |
1388 | r = sd_ipv4ll_new(&link->ipv4ll); |
1389 | if (r < 0) | |
1390 | return r; | |
1391 | ||
b5db00e5 UTL |
1392 | r = net_get_unique_predictable_data(link->udev_device, seed); |
1393 | if (r >= 0) { | |
1394 | r = sd_ipv4ll_set_address_seed(link->ipv4ll, seed); | |
1395 | if (r < 0) | |
1396 | return r; | |
1397 | } | |
1398 | ||
eb34d4af TG |
1399 | r = sd_ipv4ll_attach_event(link->ipv4ll, NULL, 0); |
1400 | if (r < 0) | |
1401 | return r; | |
1402 | ||
1403 | r = sd_ipv4ll_set_index(link->ipv4ll, link->ifindex); | |
1404 | if (r < 0) | |
1405 | return r; | |
1406 | ||
1407 | r = sd_ipv4ll_set_callback(link->ipv4ll, ipv4ll_handler, link); | |
1408 | if (r < 0) | |
1409 | return r; | |
1410 | } | |
1411 | ||
1412 | if (link->network->dhcp) { | |
1413 | r = sd_dhcp_client_new(&link->dhcp_client); | |
1414 | if (r < 0) | |
1415 | return r; | |
1416 | ||
1417 | r = sd_dhcp_client_attach_event(link->dhcp_client, NULL, 0); | |
1418 | if (r < 0) | |
1419 | return r; | |
1420 | ||
1421 | r = sd_dhcp_client_set_index(link->dhcp_client, link->ifindex); | |
1422 | if (r < 0) | |
1423 | return r; | |
1424 | ||
1425 | r = sd_dhcp_client_set_callback(link->dhcp_client, dhcp_handler, link); | |
1426 | if (r < 0) | |
1427 | return r; | |
1428 | ||
1429 | if (link->network->dhcp_mtu) { | |
1430 | r = sd_dhcp_client_set_request_option(link->dhcp_client, 26); | |
1431 | if (r < 0) | |
1432 | return r; | |
1433 | } | |
1434 | } | |
1435 | ||
a748b692 TG |
1436 | r = link_configure(link); |
1437 | if (r < 0) | |
1438 | return r; | |
1439 | ||
1440 | return 0; | |
1441 | } | |
1442 | ||
22936833 TG |
1443 | int link_update(Link *link, sd_rtnl_message *m) { |
1444 | unsigned flags; | |
c49b33ac | 1445 | struct ether_addr mac; |
22936833 TG |
1446 | int r; |
1447 | ||
dd3efc09 | 1448 | assert(link); |
a748b692 | 1449 | assert(link->network); |
22936833 TG |
1450 | assert(m); |
1451 | ||
1746cf2a TG |
1452 | if (link->state == LINK_STATE_FAILED) |
1453 | return 0; | |
1454 | ||
9842de0d TG |
1455 | if (link->network->dhcp && link->network->dhcp_mtu && |
1456 | !link->original_mtu) { | |
1457 | r = sd_rtnl_message_read_u16(m, IFLA_MTU, &link->original_mtu); | |
1458 | if (r >= 0) | |
1459 | log_debug_link(link, "saved original MTU: %" | |
1460 | PRIu16, link->original_mtu); | |
1461 | } | |
69629de9 | 1462 | |
c49b33ac | 1463 | r = sd_rtnl_message_read_ether_addr(m, IFLA_ADDRESS, &mac); |
20861203 TG |
1464 | if (r < 0) |
1465 | log_debug_link(link, "Could not get MAC address: %s", strerror(-r)); | |
1466 | else { | |
1467 | if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet, ETH_ALEN)) { | |
c49b33ac | 1468 | |
20861203 | 1469 | memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet, ETH_ALEN); |
c49b33ac | 1470 | |
20861203 TG |
1471 | log_debug_link(link, "MAC address: " |
1472 | "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx", | |
1473 | mac.ether_addr_octet[0], | |
1474 | mac.ether_addr_octet[1], | |
1475 | mac.ether_addr_octet[2], | |
1476 | mac.ether_addr_octet[3], | |
1477 | mac.ether_addr_octet[4], | |
1478 | mac.ether_addr_octet[5]); | |
c49b33ac | 1479 | |
20861203 TG |
1480 | if (link->ipv4ll) { |
1481 | r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac); | |
1482 | if (r < 0) { | |
1483 | log_warning_link(link, "Could not update MAC " | |
1484 | "address in IPv4LL client: %s", | |
1485 | strerror(-r)); | |
1486 | return r; | |
1487 | } | |
c49b33ac | 1488 | } |
c49b33ac | 1489 | |
20861203 TG |
1490 | if (link->dhcp_client) { |
1491 | r = sd_dhcp_client_set_mac(link->dhcp_client, &link->mac); | |
1492 | if (r < 0) { | |
1493 | log_warning_link(link, "Could not update MAC " | |
1494 | "address in DHCP client: %s", | |
1495 | strerror(-r)); | |
1496 | return r; | |
1497 | } | |
c49b33ac TG |
1498 | } |
1499 | } | |
4f882b2a TG |
1500 | } |
1501 | ||
a748b692 TG |
1502 | r = sd_rtnl_message_link_get_flags(m, &flags); |
1503 | if (r < 0) { | |
1504 | log_warning_link(link, "Could not get link flags"); | |
1505 | return r; | |
1506 | } | |
1507 | ||
ff254138 | 1508 | return link_update_flags(link, flags); |
dd3efc09 | 1509 | } |
fe8db0c5 TG |
1510 | |
1511 | int link_save(Link *link) { | |
1512 | _cleanup_free_ char *temp_path = NULL; | |
1513 | _cleanup_fclose_ FILE *f = NULL; | |
7ff8f4b5 | 1514 | const char *state; |
fe8db0c5 TG |
1515 | int r; |
1516 | ||
1517 | assert(link); | |
1518 | assert(link->state_file); | |
1519 | ||
7ff8f4b5 TG |
1520 | state = link_state_to_string(link->state); |
1521 | if (!state) | |
1522 | goto finish; | |
1523 | ||
fe8db0c5 TG |
1524 | r = fopen_temporary(link->state_file, &f, &temp_path); |
1525 | if (r < 0) | |
1526 | goto finish; | |
1527 | ||
1528 | fchmod(fileno(f), 0644); | |
1529 | ||
1530 | fprintf(f, | |
1531 | "# This is private data. Do not parse.\n" | |
7ff8f4b5 | 1532 | "STATE=%s\n", state); |
fe8db0c5 TG |
1533 | |
1534 | if (link->dhcp_lease) { | |
fd88eb8a | 1535 | _cleanup_free_ char *lease_file = NULL; |
2a1763ed | 1536 | |
315db1a8 ZJS |
1537 | r = asprintf(&lease_file, "/run/systemd/network/leases/%"PRIu64, |
1538 | link->ifindex); | |
2a1763ed | 1539 | if (r < 0) |
315db1a8 | 1540 | return -ENOMEM; |
fe8db0c5 TG |
1541 | |
1542 | r = dhcp_lease_save(link->dhcp_lease, lease_file); | |
1543 | if (r < 0) | |
1544 | goto finish; | |
1545 | ||
1546 | fprintf(f, "DHCP_LEASE=%s\n", lease_file); | |
1547 | } | |
1548 | ||
1549 | fflush(f); | |
1550 | ||
1551 | if (ferror(f) || rename(temp_path, link->state_file) < 0) { | |
1552 | r = -errno; | |
1553 | unlink(link->state_file); | |
1554 | unlink(temp_path); | |
1555 | } | |
1556 | ||
1557 | finish: | |
1558 | if (r < 0) | |
1559 | log_error("Failed to save link data %s: %s", link->state_file, strerror(-r)); | |
1560 | ||
1561 | return r; | |
1562 | } | |
1563 | ||
1564 | static const char* const link_state_table[_LINK_STATE_MAX] = { | |
1565 | [LINK_STATE_ENSLAVING] = "configuring", | |
1566 | [LINK_STATE_SETTING_ADDRESSES] = "configuring", | |
1567 | [LINK_STATE_SETTING_ROUTES] = "configuring", | |
1568 | [LINK_STATE_CONFIGURED] = "configured", | |
1569 | [LINK_STATE_FAILED] = "failed", | |
1570 | }; | |
1571 | ||
1572 | DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState); |