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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" | |
28 | ||
29 | int link_new(Manager *manager, struct udev_device *device, Link **ret) { | |
30 | _cleanup_link_free_ Link *link = NULL; | |
8cd11a0f | 31 | const char *mac; |
602cc437 | 32 | struct ether_addr *mac_addr; |
c166a070 | 33 | const char *ifname; |
f579559b TG |
34 | int r; |
35 | ||
36 | assert(device); | |
37 | assert(ret); | |
38 | ||
39 | link = new0(Link, 1); | |
40 | if (!link) | |
41 | return -ENOMEM; | |
42 | ||
5a3eb5a7 TG |
43 | link->manager = manager; |
44 | link->state = _LINK_STATE_INVALID; | |
45 | ||
0617ffab TG |
46 | link->ifindex = udev_device_get_ifindex(device); |
47 | if (link->ifindex <= 0) | |
f579559b TG |
48 | return -EINVAL; |
49 | ||
8cd11a0f | 50 | mac = udev_device_get_sysattr_value(device, "address"); |
5a3eb5a7 TG |
51 | if (mac) { |
52 | mac_addr = ether_aton(mac); | |
53 | if (mac_addr) | |
54 | memcpy(&link->mac, mac_addr, sizeof(struct ether_addr)); | |
55 | } | |
f579559b | 56 | |
c166a070 TG |
57 | ifname = udev_device_get_sysname(device); |
58 | link->ifname = strdup(ifname); | |
59 | ||
0617ffab | 60 | r = hashmap_put(manager->links, &link->ifindex, link); |
f579559b TG |
61 | if (r < 0) |
62 | return r; | |
63 | ||
64 | *ret = link; | |
65 | link = NULL; | |
66 | ||
67 | return 0; | |
68 | } | |
69 | ||
70 | void link_free(Link *link) { | |
71 | if (!link) | |
72 | return; | |
73 | ||
0617ffab | 74 | assert(link->manager); |
f579559b | 75 | |
f5be5601 TG |
76 | if (link->dhcp) |
77 | sd_dhcp_client_free(link->dhcp); | |
78 | ||
79 | route_free(link->dhcp_route); | |
80 | link->dhcp_route = NULL; | |
81 | ||
82 | address_free(link->dhcp_address); | |
83 | link->dhcp_address = NULL; | |
84 | ||
0617ffab | 85 | hashmap_remove(link->manager->links, &link->ifindex); |
f579559b | 86 | |
c166a070 TG |
87 | free(link->ifname); |
88 | ||
f579559b TG |
89 | free(link); |
90 | } | |
91 | ||
aa3437a5 | 92 | int link_add(Manager *m, struct udev_device *device, Link **ret) { |
f579559b TG |
93 | Link *link; |
94 | Network *network; | |
95 | int r; | |
96 | uint64_t ifindex; | |
02b59d57 | 97 | const char *devtype; |
f579559b TG |
98 | |
99 | assert(m); | |
100 | assert(device); | |
101 | ||
102 | ifindex = udev_device_get_ifindex(device); | |
103 | link = hashmap_get(m->links, &ifindex); | |
aa3437a5 TG |
104 | if (link) { |
105 | *ret = link; | |
2672953b | 106 | return -EEXIST; |
aa3437a5 | 107 | } |
f579559b TG |
108 | |
109 | r = link_new(m, device, &link); | |
2672953b | 110 | if (r < 0) |
f579559b | 111 | return r; |
f579559b | 112 | |
aa3437a5 TG |
113 | *ret = link; |
114 | ||
02b59d57 TG |
115 | devtype = udev_device_get_devtype(device); |
116 | if (streq_ptr(devtype, "bridge")) { | |
117 | r = bridge_set_link(m, link); | |
aa3437a5 TG |
118 | if (r < 0 && r != -ENOENT) |
119 | return r; | |
02b59d57 TG |
120 | } |
121 | ||
f579559b TG |
122 | r = network_get(m, device, &network); |
123 | if (r < 0) | |
124 | return r == -ENOENT ? 0 : r; | |
125 | ||
126 | r = network_apply(m, network, link); | |
127 | if (r < 0) | |
128 | return r; | |
129 | ||
130 | return 0; | |
131 | } | |
132 | ||
f882c247 | 133 | static int link_enter_configured(Link *link) { |
ef1ba606 TG |
134 | assert(link); |
135 | assert(link->state == LINK_STATE_SETTING_ROUTES); | |
136 | ||
39032b87 | 137 | log_info_link(link, "link configured"); |
f882c247 TG |
138 | |
139 | link->state = LINK_STATE_CONFIGURED; | |
140 | ||
141 | return 0; | |
142 | } | |
143 | ||
ef1ba606 TG |
144 | static void link_enter_failed(Link *link) { |
145 | assert(link); | |
f882c247 | 146 | |
39032b87 | 147 | log_warning_link(link, "failed"); |
449f7554 | 148 | |
ef1ba606 | 149 | link->state = LINK_STATE_FAILED; |
f882c247 TG |
150 | } |
151 | ||
f882c247 TG |
152 | static int route_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { |
153 | Link *link = userdata; | |
154 | int r; | |
155 | ||
f5be5601 TG |
156 | assert(link->route_messages > 0); |
157 | assert(link->state == LINK_STATE_SETTING_ADDRESSES || | |
158 | link->state == LINK_STATE_SETTING_ROUTES || | |
159 | link->state == LINK_STATE_FAILED); | |
f882c247 | 160 | |
f5be5601 | 161 | link->route_messages --; |
f882c247 TG |
162 | |
163 | if (link->state == LINK_STATE_FAILED) | |
164 | return 1; | |
165 | ||
166 | r = sd_rtnl_message_get_errno(m); | |
c166a070 | 167 | if (r < 0 && r != -EEXIST) |
3333d748 | 168 | log_warning_link(link, "could not set route: %s", strerror(-r)); |
f882c247 | 169 | |
f5be5601 TG |
170 | /* we might have received an old reply after moving back to SETTING_ADDRESSES, |
171 | * ignore it */ | |
172 | if (link->route_messages == 0 && link->state == LINK_STATE_SETTING_ROUTES) { | |
39032b87 | 173 | log_debug_link(link, "routes set"); |
dd3efc09 TG |
174 | link_enter_configured(link); |
175 | } | |
f882c247 TG |
176 | |
177 | return 1; | |
178 | } | |
179 | ||
180 | static int link_enter_set_routes(Link *link) { | |
181 | Route *route; | |
182 | int r; | |
183 | ||
184 | assert(link); | |
185 | assert(link->network); | |
ef1ba606 | 186 | assert(link->state == LINK_STATE_SETTING_ADDRESSES); |
f882c247 | 187 | |
ef1ba606 | 188 | link->state = LINK_STATE_SETTING_ROUTES; |
f882c247 | 189 | |
f5be5601 | 190 | if (!link->network->static_routes && !link->dhcp_route) |
dd3efc09 | 191 | return link_enter_configured(link); |
f882c247 | 192 | |
39032b87 | 193 | log_debug_link(link, "setting routes"); |
449f7554 | 194 | |
f048a16b | 195 | LIST_FOREACH(static_routes, route, link->network->static_routes) { |
f882c247 | 196 | r = route_configure(route, link, &route_handler); |
dd3efc09 | 197 | if (r < 0) { |
3333d748 ZJS |
198 | log_warning_link(link, |
199 | "could not set routes: %s", strerror(-r)); | |
ef1ba606 TG |
200 | link_enter_failed(link); |
201 | return r; | |
dd3efc09 | 202 | } |
c166a070 | 203 | |
f5be5601 TG |
204 | link->route_messages ++; |
205 | } | |
206 | ||
207 | if (link->dhcp_route) { | |
208 | r = route_configure(link->dhcp_route, link, &route_handler); | |
209 | if (r < 0) { | |
3333d748 ZJS |
210 | log_warning_link(link, |
211 | "could not set routes: %s", strerror(-r)); | |
f5be5601 TG |
212 | link_enter_failed(link); |
213 | return r; | |
214 | } | |
215 | ||
216 | link->route_messages ++; | |
f882c247 TG |
217 | } |
218 | ||
219 | return 0; | |
220 | } | |
221 | ||
f882c247 TG |
222 | static int address_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { |
223 | Link *link = userdata; | |
224 | int r; | |
225 | ||
f5be5601 TG |
226 | assert(m); |
227 | assert(link); | |
228 | assert(link->ifname); | |
229 | assert(link->addr_messages > 0); | |
ef1ba606 | 230 | assert(link->state == LINK_STATE_SETTING_ADDRESSES || link->state == LINK_STATE_FAILED); |
f882c247 | 231 | |
f5be5601 | 232 | link->addr_messages --; |
f882c247 TG |
233 | |
234 | if (link->state == LINK_STATE_FAILED) | |
235 | return 1; | |
236 | ||
237 | r = sd_rtnl_message_get_errno(m); | |
c166a070 | 238 | if (r < 0 && r != -EEXIST) |
3333d748 ZJS |
239 | log_struct_link(LOG_ERR, link, |
240 | "MESSAGE=%s: could not set address: %s", | |
241 | link->ifname, strerror(-r), | |
242 | "ERRNO=%d", -r, | |
243 | NULL); | |
f882c247 | 244 | |
f5be5601 | 245 | if (link->addr_messages == 0) { |
39032b87 | 246 | log_debug_link(link, "addresses set"); |
ef1ba606 | 247 | link_enter_set_routes(link); |
dd3efc09 | 248 | } |
f882c247 TG |
249 | |
250 | return 1; | |
251 | } | |
252 | ||
253 | static int link_enter_set_addresses(Link *link) { | |
254 | Address *address; | |
255 | int r; | |
256 | ||
257 | assert(link); | |
258 | assert(link->network); | |
f5be5601 | 259 | assert(link->state != _LINK_STATE_INVALID); |
f882c247 | 260 | |
ef1ba606 | 261 | link->state = LINK_STATE_SETTING_ADDRESSES; |
f882c247 | 262 | |
f5be5601 | 263 | if (!link->network->static_addresses && !link->dhcp_address) |
ef1ba606 | 264 | return link_enter_set_routes(link); |
f882c247 | 265 | |
39032b87 | 266 | log_debug_link(link, "setting addresses"); |
449f7554 | 267 | |
f048a16b | 268 | LIST_FOREACH(static_addresses, address, link->network->static_addresses) { |
f882c247 | 269 | r = address_configure(address, link, &address_handler); |
dd3efc09 | 270 | if (r < 0) { |
3333d748 ZJS |
271 | log_warning_link(link, |
272 | "could not set addresses: %s", strerror(-r)); | |
ef1ba606 TG |
273 | link_enter_failed(link); |
274 | return r; | |
dd3efc09 | 275 | } |
c166a070 | 276 | |
f5be5601 TG |
277 | link->addr_messages ++; |
278 | } | |
279 | ||
280 | if (link->dhcp_address) { | |
281 | r = address_configure(link->dhcp_address, link, &address_handler); | |
282 | if (r < 0) { | |
3333d748 ZJS |
283 | log_warning_link(link, |
284 | "could not set addresses: %s", strerror(-r)); | |
f5be5601 TG |
285 | link_enter_failed(link); |
286 | return r; | |
287 | } | |
288 | ||
289 | link->addr_messages ++; | |
f882c247 TG |
290 | } |
291 | ||
292 | return 0; | |
293 | } | |
294 | ||
ff254138 TG |
295 | static int address_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 != -EEXIST) | |
3333d748 | 308 | log_warning_link(link, "could not drop address: %s", strerror(-r)); |
ff254138 TG |
309 | |
310 | return 1; | |
311 | } | |
312 | ||
4f882b2a TG |
313 | static int set_mtu_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { |
314 | Link *link = userdata; | |
315 | int r; | |
316 | ||
317 | assert(m); | |
318 | assert(link); | |
319 | assert(link->ifname); | |
320 | ||
321 | if (link->state == LINK_STATE_FAILED) | |
322 | return 1; | |
323 | ||
324 | r = sd_rtnl_message_get_errno(m); | |
325 | if (r < 0 && r != -EEXIST) | |
326 | log_warning_link(link, "Could not set MTU: %s", strerror(-r)); | |
327 | ||
328 | return 1; | |
329 | } | |
330 | ||
331 | static int link_set_mtu(Link *link, uint32_t mtu) { | |
332 | _cleanup_sd_rtnl_message_unref_ sd_rtnl_message *req = NULL; | |
333 | int r; | |
334 | ||
335 | assert(link); | |
336 | assert(link->manager); | |
337 | assert(link->manager->rtnl); | |
338 | ||
339 | log_debug_link(link, "setting MTU: %" PRIu32, mtu); | |
340 | ||
341 | r = sd_rtnl_message_link_new(RTM_SETLINK, link->ifindex, &req); | |
342 | if (r < 0) { | |
343 | log_error_link(link, "Could not allocate RTM_SETLINK message"); | |
344 | return r; | |
345 | } | |
346 | ||
347 | r = sd_rtnl_message_append_u32(req, IFLA_MTU, mtu); | |
348 | if (r < 0) { | |
349 | log_error_link(link, "Could not append MTU: %s", strerror(-r)); | |
350 | return r; | |
351 | } | |
352 | ||
353 | r = sd_rtnl_call_async(link->manager->rtnl, req, set_mtu_handler, link, 0, NULL); | |
354 | if (r < 0) { | |
355 | log_error_link(link, | |
356 | "Could not send rtnetlink message: %s", strerror(-r)); | |
357 | return r; | |
358 | } | |
359 | ||
360 | return 0; | |
361 | } | |
362 | ||
ff254138 TG |
363 | static void dhcp_handler(sd_dhcp_client *client, int event, void *userdata) { |
364 | Link *link = userdata; | |
365 | struct in_addr address; | |
366 | struct in_addr netmask; | |
367 | struct in_addr gateway; | |
368 | int prefixlen; | |
369 | int r; | |
370 | ||
371 | assert(link); | |
5be4d38e | 372 | assert(link->network); |
ff254138 TG |
373 | |
374 | if (link->state == LINK_STATE_FAILED) | |
375 | return; | |
376 | ||
377 | if (event < 0) { | |
3333d748 | 378 | log_warning_link(link, "DHCP error: %s", strerror(-event)); |
ff254138 TG |
379 | link_enter_failed(link); |
380 | return; | |
381 | } | |
382 | ||
383 | if (event == DHCP_EVENT_NO_LEASE) | |
39032b87 | 384 | log_debug_link(link, "IP address in use."); |
ff254138 TG |
385 | |
386 | if (event == DHCP_EVENT_IP_CHANGE || event == DHCP_EVENT_EXPIRED || | |
387 | event == DHCP_EVENT_STOP) { | |
388 | if (link->dhcp_address) { | |
389 | address_drop(link->dhcp_address, link, address_drop_handler); | |
390 | ||
391 | address_free(link->dhcp_address); | |
392 | link->dhcp_address = NULL; | |
393 | } | |
394 | ||
395 | if (link->dhcp_route) { | |
396 | route_free(link->dhcp_route); | |
397 | link->dhcp_route = NULL; | |
398 | } | |
4f882b2a TG |
399 | |
400 | if (link->network->dhcp_mtu) { | |
401 | uint16_t mtu; | |
402 | ||
403 | r = sd_dhcp_client_get_mtu(client, &mtu); | |
404 | if (r >= 0 && link->original_mtu != mtu) { | |
405 | r = link_set_mtu(link, link->original_mtu); | |
406 | if (r < 0) { | |
407 | log_warning_link(link, "DHCP error: could not reset MTU"); | |
408 | link_enter_failed(link); | |
409 | return; | |
410 | } | |
411 | } | |
412 | } | |
ff254138 TG |
413 | } |
414 | ||
415 | r = sd_dhcp_client_get_address(client, &address); | |
416 | if (r < 0) { | |
39032b87 | 417 | log_warning_link(link, "DHCP error: no address"); |
ff254138 TG |
418 | link_enter_failed(link); |
419 | return; | |
420 | } | |
421 | ||
422 | r = sd_dhcp_client_get_netmask(client, &netmask); | |
423 | if (r < 0) { | |
39032b87 | 424 | log_warning_link(link, "DHCP error: no netmask"); |
ff254138 TG |
425 | link_enter_failed(link); |
426 | return; | |
427 | } | |
428 | ||
429 | prefixlen = sd_dhcp_client_prefixlen(&netmask); | |
430 | if (prefixlen < 0) { | |
39032b87 | 431 | log_warning_link(link, "DHCP error: no prefixlen"); |
ff254138 TG |
432 | link_enter_failed(link); |
433 | return; | |
434 | } | |
435 | ||
436 | r = sd_dhcp_client_get_router(client, &gateway); | |
437 | if (r < 0) { | |
39032b87 | 438 | log_warning_link(link, "DHCP error: no router"); |
ff254138 TG |
439 | link_enter_failed(link); |
440 | return; | |
441 | } | |
442 | ||
443 | if (event == DHCP_EVENT_IP_CHANGE || event == DHCP_EVENT_IP_ACQUIRE) { | |
444 | _cleanup_address_free_ Address *addr = NULL; | |
445 | _cleanup_route_free_ Route *rt = NULL; | |
3bef724f | 446 | struct in_addr **nameservers; |
ff254138 | 447 | |
62870613 ZJS |
448 | log_struct_link(LOG_INFO, link, |
449 | "MESSAGE=%s: DHCPv4 address %u.%u.%u.%u/%u via %u.%u.%u.%u", | |
450 | link->ifname, | |
451 | ADDRESS_FMT_VAL(address), | |
452 | prefixlen, | |
453 | ADDRESS_FMT_VAL(gateway), | |
454 | "ADDRESS=%u.%u.%u.%u", | |
455 | ADDRESS_FMT_VAL(address), | |
456 | "PREFIXLEN=%u", | |
457 | prefixlen, | |
458 | "GATEWAY=%u.%u.%u.%u", | |
459 | ADDRESS_FMT_VAL(gateway), | |
460 | NULL); | |
ff254138 TG |
461 | |
462 | r = address_new_dynamic(&addr); | |
463 | if (r < 0) { | |
39032b87 | 464 | log_error_link(link, "Could not allocate address"); |
ff254138 TG |
465 | link_enter_failed(link); |
466 | return; | |
467 | } | |
468 | ||
469 | addr->family = AF_INET; | |
470 | addr->in_addr.in = address; | |
471 | addr->prefixlen = prefixlen; | |
472 | addr->netmask = netmask; | |
473 | ||
474 | r = route_new_dynamic(&rt); | |
475 | if (r < 0) { | |
39032b87 | 476 | log_error_link(link, "Could not allocate route"); |
ff254138 TG |
477 | link_enter_failed(link); |
478 | return; | |
479 | } | |
480 | ||
481 | rt->family = AF_INET; | |
482 | rt->in_addr.in = gateway; | |
483 | ||
484 | link->dhcp_address = addr; | |
485 | link->dhcp_route = rt; | |
486 | addr = NULL; | |
487 | rt = NULL; | |
488 | ||
5be4d38e TG |
489 | if (link->network->dhcp_dns) { |
490 | r = sd_dhcp_client_get_dns(client, &nameservers); | |
491 | if (r >= 0) { | |
492 | r = manager_update_resolv_conf(link->manager); | |
493 | if (r < 0) | |
494 | log_error("Failed to update resolv.conf"); | |
495 | } | |
3bef724f TG |
496 | } |
497 | ||
4f882b2a TG |
498 | if (link->network->dhcp_mtu) { |
499 | uint16_t mtu; | |
500 | ||
501 | r = sd_dhcp_client_get_mtu(client, &mtu); | |
502 | if (r >= 0) { | |
503 | r = link_set_mtu(link, mtu); | |
504 | if (r < 0) | |
505 | log_error_link(link, "Failed to set MTU " | |
506 | "to %" PRIu16, mtu); | |
507 | } | |
508 | } | |
509 | ||
ff254138 TG |
510 | link_enter_set_addresses(link); |
511 | } | |
512 | ||
513 | return; | |
514 | } | |
515 | ||
516 | static int link_acquire_conf(Link *link) { | |
517 | int r; | |
518 | ||
519 | assert(link); | |
520 | assert(link->network); | |
521 | assert(link->network->dhcp); | |
522 | assert(link->manager); | |
523 | assert(link->manager->event); | |
524 | ||
525 | if (!link->dhcp) { | |
526 | link->dhcp = sd_dhcp_client_new(link->manager->event); | |
527 | if (!link->dhcp) | |
528 | return -ENOMEM; | |
529 | ||
530 | r = sd_dhcp_client_set_index(link->dhcp, link->ifindex); | |
531 | if (r < 0) | |
532 | return r; | |
533 | ||
534 | r = sd_dhcp_client_set_mac(link->dhcp, &link->mac); | |
535 | if (r < 0) | |
536 | return r; | |
537 | ||
538 | r = sd_dhcp_client_set_callback(link->dhcp, dhcp_handler, link); | |
539 | if (r < 0) | |
540 | return r; | |
6fc73498 TG |
541 | |
542 | if (link->network->dhcp_mtu) { | |
543 | r = sd_dhcp_client_set_request_option(link->dhcp, 26); | |
544 | if (r < 0) | |
545 | return r; | |
546 | } | |
ff254138 TG |
547 | } |
548 | ||
ab47d620 TG |
549 | log_debug_link(link, "acquiring DHCPv4 lease"); |
550 | ||
ff254138 TG |
551 | r = sd_dhcp_client_start(link->dhcp); |
552 | if (r < 0) | |
553 | return r; | |
554 | ||
555 | return 0; | |
556 | } | |
557 | ||
558 | static int link_update_flags(Link *link, unsigned flags) { | |
559 | int r; | |
560 | ||
561 | assert(link); | |
562 | assert(link->network); | |
563 | ||
564 | if (link->state == LINK_STATE_FAILED) | |
565 | return 0; | |
566 | ||
efbc88b8 | 567 | if (link->flags == flags) { |
ab47d620 | 568 | log_debug_link(link, "link status unchanged: %#.8x", flags); |
efbc88b8 TG |
569 | return 0; |
570 | } | |
571 | ||
3333d748 ZJS |
572 | if ((link->flags & IFF_UP) != (flags & IFF_UP)) |
573 | log_info_link(link, | |
574 | "power %s", flags & IFF_UP ? "on": "off"); | |
efbc88b8 TG |
575 | |
576 | if ((link->flags & IFF_LOWER_UP) != (flags & IFF_LOWER_UP)) { | |
577 | if (flags & IFF_LOWER_UP) { | |
39032b87 | 578 | log_info_link(link, "carrier on"); |
efbc88b8 TG |
579 | |
580 | if (link->network->dhcp) { | |
581 | r = link_acquire_conf(link); | |
582 | if (r < 0) { | |
1f6d9bc9 | 583 | log_warning_link(link, "Could not acquire DHCPv4 lease: %s", strerror(-r)); |
efbc88b8 TG |
584 | link_enter_failed(link); |
585 | return r; | |
586 | } | |
ff254138 | 587 | } |
efbc88b8 | 588 | } else { |
39032b87 | 589 | log_info_link(link, "carrier off"); |
efbc88b8 TG |
590 | |
591 | if (link->network->dhcp) { | |
592 | r = sd_dhcp_client_stop(link->dhcp); | |
593 | if (r < 0) { | |
1f6d9bc9 | 594 | log_warning_link(link, "Could not stop DHCPv4 client: %s", strerror(-r)); |
efbc88b8 TG |
595 | link_enter_failed(link); |
596 | return r; | |
597 | } | |
ff254138 TG |
598 | } |
599 | } | |
600 | } | |
601 | ||
3333d748 | 602 | log_debug_link(link, |
ab47d620 | 603 | "link status updated: %#.8x -> %#.8x", link->flags, flags); |
efbc88b8 | 604 | |
ff254138 TG |
605 | link->flags = flags; |
606 | ||
607 | return 0; | |
608 | } | |
609 | ||
dd3efc09 TG |
610 | static int link_up_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { |
611 | Link *link = userdata; | |
612 | int r; | |
613 | ||
1746cf2a TG |
614 | assert(link); |
615 | ||
616 | if (link->state == LINK_STATE_FAILED) | |
617 | return 1; | |
618 | ||
dd3efc09 TG |
619 | r = sd_rtnl_message_get_errno(m); |
620 | if (r < 0) { | |
3333d748 ZJS |
621 | log_warning_link(link, |
622 | "could not bring up interface: %s", strerror(-r)); | |
dd3efc09 TG |
623 | link_enter_failed(link); |
624 | } | |
f882c247 | 625 | |
ff254138 | 626 | link_update_flags(link, link->flags | IFF_UP); |
1746cf2a | 627 | |
f882c247 TG |
628 | return 1; |
629 | } | |
630 | ||
631 | static int link_up(Link *link) { | |
f579559b TG |
632 | _cleanup_sd_rtnl_message_unref_ sd_rtnl_message *req = NULL; |
633 | int r; | |
634 | ||
f882c247 TG |
635 | assert(link); |
636 | assert(link->manager); | |
637 | assert(link->manager->rtnl); | |
638 | ||
39032b87 | 639 | log_debug_link(link, "bringing link up"); |
449f7554 | 640 | |
0f49a5f7 | 641 | r = sd_rtnl_message_link_new(RTM_SETLINK, link->ifindex, &req); |
f579559b | 642 | if (r < 0) { |
39032b87 | 643 | log_error_link(link, "Could not allocate RTM_SETLINK message"); |
f579559b TG |
644 | return r; |
645 | } | |
646 | ||
fc25d7f8 TG |
647 | r = sd_rtnl_message_link_set_flags(req, IFF_UP); |
648 | if (r < 0) { | |
3333d748 | 649 | log_error_link(link, "Could not set link flags: %s", strerror(-r)); |
fc25d7f8 TG |
650 | return r; |
651 | } | |
652 | ||
dd3efc09 | 653 | r = sd_rtnl_call_async(link->manager->rtnl, req, link_up_handler, link, 0, NULL); |
f579559b | 654 | if (r < 0) { |
3333d748 ZJS |
655 | log_error_link(link, |
656 | "Could not send rtnetlink message: %s", strerror(-r)); | |
f579559b TG |
657 | return r; |
658 | } | |
659 | ||
f882c247 TG |
660 | return 0; |
661 | } | |
662 | ||
ef1ba606 | 663 | static int link_bridge_joined(Link *link) { |
f882c247 TG |
664 | int r; |
665 | ||
ef1ba606 TG |
666 | assert(link); |
667 | assert(link->state == LINK_STATE_JOINING_BRIDGE); | |
f5be5601 | 668 | assert(link->network); |
dd3efc09 | 669 | |
f882c247 | 670 | r = link_up(link); |
ef1ba606 TG |
671 | if (r < 0) { |
672 | link_enter_failed(link); | |
673 | return r; | |
674 | } | |
f882c247 | 675 | |
1746cf2a TG |
676 | if (!link->network->dhcp) |
677 | return link_enter_set_addresses(link); | |
ef1ba606 TG |
678 | |
679 | return 0; | |
02b59d57 TG |
680 | } |
681 | ||
682 | static int bridge_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { | |
683 | Link *link = userdata; | |
684 | int r; | |
685 | ||
1746cf2a | 686 | assert(link); |
ef1ba606 TG |
687 | assert(link->state == LINK_STATE_JOINING_BRIDGE || link->state == LINK_STATE_FAILED); |
688 | assert(link->network); | |
02b59d57 TG |
689 | |
690 | if (link->state == LINK_STATE_FAILED) | |
691 | return 1; | |
692 | ||
693 | r = sd_rtnl_message_get_errno(m); | |
ef1ba606 | 694 | if (r < 0) { |
3333d748 ZJS |
695 | log_struct_link(LOG_ERR, link, |
696 | "MESSAGE=%s: could not join bridge '%s': %s", | |
697 | link->ifname, link->network->bridge->name, strerror(-r), | |
698 | BRIDGE(link->network->bridge), | |
699 | NULL); | |
ef1ba606 TG |
700 | link_enter_failed(link); |
701 | return 1; | |
3333d748 | 702 | } |
02b59d57 | 703 | |
3333d748 ZJS |
704 | log_struct_link(LOG_DEBUG, link, |
705 | "MESSAGE=%s: joined bridge '%s'", | |
706 | link->network->bridge->name, | |
707 | BRIDGE(link->network->bridge), | |
708 | NULL); | |
ab47d620 | 709 | |
ef1ba606 | 710 | link_bridge_joined(link); |
02b59d57 TG |
711 | |
712 | return 1; | |
713 | } | |
714 | ||
715 | static int link_enter_join_bridge(Link *link) { | |
716 | int r; | |
717 | ||
718 | assert(link); | |
719 | assert(link->network); | |
ef1ba606 | 720 | assert(link->state == _LINK_STATE_INVALID); |
02b59d57 | 721 | |
ef1ba606 | 722 | link->state = LINK_STATE_JOINING_BRIDGE; |
02b59d57 | 723 | |
ef1ba606 TG |
724 | if (!link->network->bridge) |
725 | return link_bridge_joined(link); | |
02b59d57 | 726 | |
3333d748 ZJS |
727 | log_struct_link(LOG_DEBUG, link, |
728 | "MESSAGE=%s: joining bridge '%s'", | |
729 | link->network->bridge->name, | |
730 | BRIDGE(link->network->bridge), | |
731 | NULL); | |
39032b87 | 732 | log_debug_link(link, "joining bridge"); |
449f7554 | 733 | |
02b59d57 | 734 | r = bridge_join(link->network->bridge, link, &bridge_handler); |
dd3efc09 | 735 | if (r < 0) { |
3333d748 ZJS |
736 | log_struct_link(LOG_WARNING, link, |
737 | "MESSAGE=%s: could not join bridge '%s': %s", | |
738 | link->network->bridge->name, strerror(-r), | |
739 | BRIDGE(link->network->bridge), | |
740 | NULL); | |
ef1ba606 TG |
741 | link_enter_failed(link); |
742 | return r; | |
743 | } | |
744 | ||
745 | return 0; | |
746 | } | |
747 | ||
748 | static int link_get_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { | |
749 | Link *link = userdata; | |
750 | int r; | |
751 | ||
1746cf2a TG |
752 | assert(link); |
753 | ||
754 | if (link->state == LINK_STATE_FAILED) | |
755 | return 1; | |
756 | ||
ef1ba606 TG |
757 | r = sd_rtnl_message_get_errno(m); |
758 | if (r < 0) { | |
3333d748 | 759 | log_warning_link(link, "could not get state: %s", strerror(-r)); |
ef1ba606 TG |
760 | link_enter_failed(link); |
761 | } | |
762 | ||
39032b87 | 763 | log_debug_link(link, "got link state"); |
1746cf2a | 764 | |
5eb036ca TG |
765 | link_update(link, m); |
766 | ||
ef1ba606 TG |
767 | return 1; |
768 | } | |
769 | ||
770 | static int link_get(Link *link) { | |
771 | _cleanup_sd_rtnl_message_unref_ sd_rtnl_message *req = NULL; | |
772 | int r; | |
773 | ||
774 | assert(link); | |
775 | assert(link->manager); | |
776 | assert(link->manager->rtnl); | |
777 | ||
39032b87 | 778 | log_debug_link(link, "requesting link status"); |
449f7554 | 779 | |
ef1ba606 TG |
780 | r = sd_rtnl_message_link_new(RTM_GETLINK, link->ifindex, &req); |
781 | if (r < 0) { | |
39032b87 | 782 | log_error_link(link, "Could not allocate RTM_GETLINK message"); |
ef1ba606 TG |
783 | return r; |
784 | } | |
785 | ||
786 | r = sd_rtnl_call_async(link->manager->rtnl, req, link_get_handler, link, 0, NULL); | |
787 | if (r < 0) { | |
3333d748 ZJS |
788 | log_error_link(link, |
789 | "Could not send rtnetlink message: %s", strerror(-r)); | |
ef1ba606 | 790 | return r; |
dd3efc09 | 791 | } |
02b59d57 TG |
792 | |
793 | return 0; | |
794 | } | |
795 | ||
796 | int link_configure(Link *link) { | |
797 | int r; | |
798 | ||
ef1ba606 TG |
799 | assert(link); |
800 | assert(link->network); | |
801 | assert(link->state == _LINK_STATE_INVALID); | |
802 | ||
dd3efc09 | 803 | r = link_get(link); |
ef1ba606 TG |
804 | if (r < 0) { |
805 | link_enter_failed(link); | |
806 | return r; | |
807 | } | |
dd3efc09 | 808 | |
1746cf2a | 809 | return link_enter_join_bridge(link); |
f579559b | 810 | } |
dd3efc09 | 811 | |
22936833 TG |
812 | int link_update(Link *link, sd_rtnl_message *m) { |
813 | unsigned flags; | |
4f882b2a TG |
814 | void *data; |
815 | uint16_t type; | |
22936833 TG |
816 | int r; |
817 | ||
dd3efc09 | 818 | assert(link); |
22936833 TG |
819 | assert(m); |
820 | ||
1746cf2a TG |
821 | if (link->state == LINK_STATE_FAILED) |
822 | return 0; | |
823 | ||
22936833 TG |
824 | r = sd_rtnl_message_link_get_flags(m, &flags); |
825 | if (r < 0) { | |
4f882b2a | 826 | log_warning_link(link, "Could not get link flags"); |
22936833 TG |
827 | return r; |
828 | } | |
dd3efc09 | 829 | |
4f882b2a | 830 | while (sd_rtnl_message_read(m, &type, &data) > 0) { |
396945dc TG |
831 | if (type == IFLA_MTU && link->network->dhcp && |
832 | link->network->dhcp_mtu && !link->original_mtu) { | |
4f882b2a | 833 | link->original_mtu = *(uint16_t *) data; |
396945dc TG |
834 | log_debug_link(link, "saved original MTU: %" PRIu16, |
835 | link->original_mtu); | |
4f882b2a TG |
836 | } |
837 | } | |
838 | ||
ff254138 | 839 | return link_update_flags(link, flags); |
dd3efc09 | 840 | } |