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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" |
377a218f | 29 | #include "net-util.h" |
f579559b TG |
30 | |
31 | int link_new(Manager *manager, struct udev_device *device, Link **ret) { | |
32 | _cleanup_link_free_ Link *link = NULL; | |
8cd11a0f | 33 | const char *mac; |
602cc437 | 34 | struct ether_addr *mac_addr; |
c166a070 | 35 | const char *ifname; |
f579559b TG |
36 | int r; |
37 | ||
38 | assert(device); | |
39 | assert(ret); | |
40 | ||
41 | link = new0(Link, 1); | |
42 | if (!link) | |
43 | return -ENOMEM; | |
44 | ||
5a3eb5a7 TG |
45 | link->manager = manager; |
46 | link->state = _LINK_STATE_INVALID; | |
47 | ||
0617ffab TG |
48 | link->ifindex = udev_device_get_ifindex(device); |
49 | if (link->ifindex <= 0) | |
f579559b TG |
50 | return -EINVAL; |
51 | ||
8cd11a0f | 52 | mac = udev_device_get_sysattr_value(device, "address"); |
5a3eb5a7 TG |
53 | if (mac) { |
54 | mac_addr = ether_aton(mac); | |
55 | if (mac_addr) | |
56 | memcpy(&link->mac, mac_addr, sizeof(struct ether_addr)); | |
57 | } | |
f579559b | 58 | |
c166a070 TG |
59 | ifname = udev_device_get_sysname(device); |
60 | link->ifname = strdup(ifname); | |
61 | ||
0617ffab | 62 | r = hashmap_put(manager->links, &link->ifindex, link); |
f579559b TG |
63 | if (r < 0) |
64 | return r; | |
65 | ||
66 | *ret = link; | |
67 | link = NULL; | |
68 | ||
69 | return 0; | |
70 | } | |
71 | ||
72 | void link_free(Link *link) { | |
73 | if (!link) | |
74 | return; | |
75 | ||
0617ffab | 76 | assert(link->manager); |
f579559b | 77 | |
a6cc569e TG |
78 | sd_dhcp_client_free(link->dhcp_client); |
79 | sd_dhcp_lease_unref(link->dhcp_lease); | |
f5be5601 | 80 | |
0617ffab | 81 | hashmap_remove(link->manager->links, &link->ifindex); |
f579559b | 82 | |
c166a070 TG |
83 | free(link->ifname); |
84 | ||
f579559b TG |
85 | free(link); |
86 | } | |
87 | ||
aa3437a5 | 88 | int link_add(Manager *m, struct udev_device *device, Link **ret) { |
f579559b TG |
89 | Link *link; |
90 | Network *network; | |
91 | int r; | |
92 | uint64_t ifindex; | |
93 | ||
94 | assert(m); | |
95 | assert(device); | |
96 | ||
97 | ifindex = udev_device_get_ifindex(device); | |
98 | link = hashmap_get(m->links, &ifindex); | |
aa3437a5 TG |
99 | if (link) { |
100 | *ret = link; | |
2672953b | 101 | return -EEXIST; |
aa3437a5 | 102 | } |
f579559b TG |
103 | |
104 | r = link_new(m, device, &link); | |
2672953b | 105 | if (r < 0) |
f579559b | 106 | return r; |
f579559b | 107 | |
aa3437a5 TG |
108 | *ret = link; |
109 | ||
f579559b TG |
110 | r = network_get(m, device, &network); |
111 | if (r < 0) | |
112 | return r == -ENOENT ? 0 : r; | |
113 | ||
114 | r = network_apply(m, network, link); | |
115 | if (r < 0) | |
116 | return r; | |
117 | ||
118 | return 0; | |
119 | } | |
120 | ||
f882c247 | 121 | static int link_enter_configured(Link *link) { |
ef1ba606 TG |
122 | assert(link); |
123 | assert(link->state == LINK_STATE_SETTING_ROUTES); | |
124 | ||
39032b87 | 125 | log_info_link(link, "link configured"); |
f882c247 TG |
126 | |
127 | link->state = LINK_STATE_CONFIGURED; | |
128 | ||
129 | return 0; | |
130 | } | |
131 | ||
ef1ba606 TG |
132 | static void link_enter_failed(Link *link) { |
133 | assert(link); | |
f882c247 | 134 | |
39032b87 | 135 | log_warning_link(link, "failed"); |
449f7554 | 136 | |
ef1ba606 | 137 | link->state = LINK_STATE_FAILED; |
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 | |
a6cc569e | 182 | if (!link->network->static_routes && !link->dhcp_lease) |
dd3efc09 | 183 | return link_enter_configured(link); |
f882c247 | 184 | |
39032b87 | 185 | log_debug_link(link, "setting routes"); |
449f7554 | 186 | |
a6cc569e TG |
187 | LIST_FOREACH(static_routes, rt, link->network->static_routes) { |
188 | r = route_configure(rt, link, &route_handler); | |
dd3efc09 | 189 | if (r < 0) { |
3333d748 ZJS |
190 | log_warning_link(link, |
191 | "could not set routes: %s", strerror(-r)); | |
ef1ba606 TG |
192 | link_enter_failed(link); |
193 | return r; | |
dd3efc09 | 194 | } |
c166a070 | 195 | |
f5be5601 TG |
196 | link->route_messages ++; |
197 | } | |
198 | ||
a6cc569e TG |
199 | if (link->dhcp_lease) { |
200 | _cleanup_route_free_ Route *route = NULL; | |
201 | struct in_addr gateway; | |
202 | ||
203 | r = sd_dhcp_lease_get_router(link->dhcp_lease, &gateway); | |
204 | if (r < 0) { | |
205 | log_warning_link(link, "DHCP error: no router: %s", | |
206 | strerror(-r)); | |
207 | return r; | |
208 | } | |
209 | ||
210 | r = route_new_dynamic(&route); | |
211 | if (r < 0) { | |
212 | log_error_link(link, "Could not allocate route: %s", | |
213 | strerror(-r)); | |
214 | return r; | |
215 | } | |
216 | ||
217 | route->family = AF_INET; | |
218 | route->in_addr.in = gateway; | |
219 | ||
220 | r = route_configure(route, link, &route_handler); | |
f5be5601 | 221 | if (r < 0) { |
3333d748 ZJS |
222 | log_warning_link(link, |
223 | "could not set routes: %s", strerror(-r)); | |
f5be5601 TG |
224 | link_enter_failed(link); |
225 | return r; | |
226 | } | |
227 | ||
228 | link->route_messages ++; | |
f882c247 TG |
229 | } |
230 | ||
231 | return 0; | |
232 | } | |
233 | ||
f882c247 TG |
234 | static int address_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { |
235 | Link *link = userdata; | |
236 | int r; | |
237 | ||
f5be5601 TG |
238 | assert(m); |
239 | assert(link); | |
240 | assert(link->ifname); | |
241 | assert(link->addr_messages > 0); | |
ef1ba606 | 242 | assert(link->state == LINK_STATE_SETTING_ADDRESSES || link->state == LINK_STATE_FAILED); |
f882c247 | 243 | |
f5be5601 | 244 | link->addr_messages --; |
f882c247 TG |
245 | |
246 | if (link->state == LINK_STATE_FAILED) | |
247 | return 1; | |
248 | ||
249 | r = sd_rtnl_message_get_errno(m); | |
c166a070 | 250 | if (r < 0 && r != -EEXIST) |
c9ccc19f | 251 | log_struct_link(LOG_WARNING, link, |
3333d748 ZJS |
252 | "MESSAGE=%s: could not set address: %s", |
253 | link->ifname, strerror(-r), | |
254 | "ERRNO=%d", -r, | |
255 | NULL); | |
f882c247 | 256 | |
f5be5601 | 257 | if (link->addr_messages == 0) { |
39032b87 | 258 | log_debug_link(link, "addresses set"); |
ef1ba606 | 259 | link_enter_set_routes(link); |
dd3efc09 | 260 | } |
f882c247 TG |
261 | |
262 | return 1; | |
263 | } | |
264 | ||
265 | static int link_enter_set_addresses(Link *link) { | |
a6cc569e | 266 | Address *ad; |
f882c247 TG |
267 | int r; |
268 | ||
269 | assert(link); | |
270 | assert(link->network); | |
f5be5601 | 271 | assert(link->state != _LINK_STATE_INVALID); |
f882c247 | 272 | |
ef1ba606 | 273 | link->state = LINK_STATE_SETTING_ADDRESSES; |
f882c247 | 274 | |
a6cc569e | 275 | if (!link->network->static_addresses && !link->dhcp_lease) |
ef1ba606 | 276 | return link_enter_set_routes(link); |
f882c247 | 277 | |
39032b87 | 278 | log_debug_link(link, "setting addresses"); |
449f7554 | 279 | |
a6cc569e TG |
280 | LIST_FOREACH(static_addresses, ad, link->network->static_addresses) { |
281 | r = address_configure(ad, link, &address_handler); | |
dd3efc09 | 282 | if (r < 0) { |
3333d748 ZJS |
283 | log_warning_link(link, |
284 | "could not set addresses: %s", strerror(-r)); | |
ef1ba606 TG |
285 | link_enter_failed(link); |
286 | return r; | |
dd3efc09 | 287 | } |
c166a070 | 288 | |
f5be5601 TG |
289 | link->addr_messages ++; |
290 | } | |
291 | ||
a6cc569e TG |
292 | if (link->dhcp_lease) { |
293 | _cleanup_address_free_ Address *address = NULL; | |
294 | struct in_addr addr; | |
295 | struct in_addr netmask; | |
296 | unsigned prefixlen; | |
297 | ||
298 | r = sd_dhcp_lease_get_address(link->dhcp_lease, &addr); | |
299 | if (r < 0) { | |
300 | log_warning_link(link, "DHCP error: no address: %s", | |
301 | strerror(-r)); | |
302 | return r; | |
303 | } | |
304 | ||
305 | r = sd_dhcp_lease_get_netmask(link->dhcp_lease, &netmask); | |
306 | if (r < 0) { | |
307 | log_warning_link(link, "DHCP error: no netmask: %s", | |
308 | strerror(-r)); | |
309 | return r; | |
310 | } | |
311 | ||
312 | prefixlen = net_netmask_to_prefixlen(&netmask); | |
313 | ||
314 | r = address_new_dynamic(&address); | |
315 | if (r < 0) { | |
316 | log_error_link(link, "Could not allocate address: %s", | |
317 | strerror(-r)); | |
318 | return r; | |
319 | } | |
320 | ||
321 | address->family = AF_INET; | |
322 | address->in_addr.in = addr; | |
323 | address->prefixlen = prefixlen; | |
324 | address->broadcast.s_addr = addr.s_addr | ~netmask.s_addr; | |
325 | ||
326 | r = address_configure(address, link, &address_handler); | |
f5be5601 | 327 | if (r < 0) { |
3333d748 ZJS |
328 | log_warning_link(link, |
329 | "could not set addresses: %s", strerror(-r)); | |
f5be5601 TG |
330 | link_enter_failed(link); |
331 | return r; | |
332 | } | |
333 | ||
334 | link->addr_messages ++; | |
f882c247 TG |
335 | } |
336 | ||
337 | return 0; | |
338 | } | |
339 | ||
ff254138 TG |
340 | static int address_drop_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { |
341 | Link *link = userdata; | |
342 | int r; | |
343 | ||
344 | assert(m); | |
345 | assert(link); | |
346 | assert(link->ifname); | |
347 | ||
348 | if (link->state == LINK_STATE_FAILED) | |
349 | return 1; | |
350 | ||
351 | r = sd_rtnl_message_get_errno(m); | |
c9ccc19f TG |
352 | if (r < 0 && r != -ENOENT) |
353 | log_struct_link(LOG_WARNING, link, | |
354 | "MESSAGE=%s: could not drop address: %s", | |
355 | link->ifname, strerror(-r), | |
356 | "ERRNO=%d", -r, | |
357 | NULL); | |
ff254138 TG |
358 | |
359 | return 1; | |
360 | } | |
361 | ||
1346b1f0 TG |
362 | static int set_hostname_handler(sd_bus *bus, sd_bus_message *m, void *userdata, sd_bus_error *ret_error) { |
363 | int r; | |
364 | ||
365 | r = sd_bus_message_get_errno(m); | |
366 | if (r < 0) | |
367 | log_warning("Could not set hostname: %s", strerror(-r)); | |
368 | ||
369 | return 1; | |
370 | } | |
371 | ||
372 | static int set_hostname(sd_bus *bus, const char *hostname) { | |
373 | _cleanup_bus_message_unref_ sd_bus_message *m = NULL; | |
374 | int r = 0; | |
375 | ||
1346b1f0 TG |
376 | assert(hostname); |
377 | ||
378 | log_debug("Setting transient hostname: '%s'", hostname); | |
379 | ||
bcbca829 TG |
380 | if (!bus) { /* TODO: replace by assert when we can rely on kdbus */ |
381 | log_info("Not connected to system bus, ignoring transient hostname."); | |
382 | return 0; | |
383 | } | |
384 | ||
1346b1f0 TG |
385 | r = sd_bus_message_new_method_call( |
386 | bus, | |
387 | "org.freedesktop.hostname1", | |
388 | "/org/freedesktop/hostname1", | |
389 | "org.freedesktop.hostname1", | |
390 | "SetHostname", | |
391 | &m); | |
392 | if (r < 0) | |
393 | return r; | |
394 | ||
395 | r = sd_bus_message_append(m, "sb", hostname, false); | |
396 | if (r < 0) | |
397 | return r; | |
398 | ||
399 | r = sd_bus_call_async(bus, m, set_hostname_handler, NULL, 0, NULL); | |
400 | if (r < 0) | |
401 | log_error("Could not set transient hostname: %s", strerror(-r)); | |
402 | ||
403 | return r; | |
404 | } | |
405 | ||
4f882b2a TG |
406 | static int set_mtu_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { |
407 | Link *link = userdata; | |
408 | int r; | |
409 | ||
410 | assert(m); | |
411 | assert(link); | |
412 | assert(link->ifname); | |
413 | ||
414 | if (link->state == LINK_STATE_FAILED) | |
415 | return 1; | |
416 | ||
417 | r = sd_rtnl_message_get_errno(m); | |
c9ccc19f TG |
418 | if (r < 0) |
419 | log_struct_link(LOG_WARNING, link, | |
420 | "MESSAGE=%s: could not set MTU: %s", | |
421 | link->ifname, strerror(-r), | |
422 | "ERRNO=%d", -r, | |
423 | NULL); | |
4f882b2a TG |
424 | |
425 | return 1; | |
426 | } | |
427 | ||
428 | static int link_set_mtu(Link *link, uint32_t mtu) { | |
cf6a8911 | 429 | _cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL; |
4f882b2a TG |
430 | int r; |
431 | ||
432 | assert(link); | |
433 | assert(link->manager); | |
434 | assert(link->manager->rtnl); | |
435 | ||
436 | log_debug_link(link, "setting MTU: %" PRIu32, mtu); | |
437 | ||
4fb7242c TG |
438 | r = sd_rtnl_message_new_link(link->manager->rtnl, RTM_SETLINK, |
439 | link->ifindex, &req); | |
4f882b2a TG |
440 | if (r < 0) { |
441 | log_error_link(link, "Could not allocate RTM_SETLINK message"); | |
442 | return r; | |
443 | } | |
444 | ||
445 | r = sd_rtnl_message_append_u32(req, IFLA_MTU, mtu); | |
446 | if (r < 0) { | |
447 | log_error_link(link, "Could not append MTU: %s", strerror(-r)); | |
448 | return r; | |
449 | } | |
450 | ||
451 | r = sd_rtnl_call_async(link->manager->rtnl, req, set_mtu_handler, link, 0, NULL); | |
452 | if (r < 0) { | |
453 | log_error_link(link, | |
454 | "Could not send rtnetlink message: %s", strerror(-r)); | |
455 | return r; | |
456 | } | |
457 | ||
458 | return 0; | |
459 | } | |
460 | ||
a6cc569e TG |
461 | static int dhcp_lease_lost(Link *link) { |
462 | _cleanup_address_free_ Address *address = NULL; | |
463 | struct in_addr addr; | |
464 | struct in_addr netmask; | |
465 | unsigned prefixlen; | |
ff254138 TG |
466 | int r; |
467 | ||
468 | assert(link); | |
a6cc569e | 469 | assert(link->dhcp_lease); |
ff254138 | 470 | |
a6cc569e TG |
471 | r = address_new_dynamic(&address); |
472 | if (r >= 0) { | |
473 | sd_dhcp_lease_get_address(link->dhcp_lease, &addr); | |
474 | sd_dhcp_lease_get_netmask(link->dhcp_lease, &netmask); | |
475 | prefixlen = net_netmask_to_prefixlen(&netmask); | |
ff254138 | 476 | |
a6cc569e TG |
477 | address->family = AF_INET; |
478 | address->in_addr.in = addr; | |
479 | address->prefixlen = prefixlen; | |
ff254138 | 480 | |
a6cc569e | 481 | address_drop(address, link, address_drop_handler); |
c07aeadf | 482 | } |
eb27aeca | 483 | |
c07aeadf TG |
484 | if (link->network->dhcp_mtu) { |
485 | uint16_t mtu; | |
ff254138 | 486 | |
a6cc569e | 487 | r = sd_dhcp_lease_get_mtu(link->dhcp_lease, &mtu); |
c07aeadf TG |
488 | if (r >= 0 && link->original_mtu != mtu) { |
489 | r = link_set_mtu(link, link->original_mtu); | |
490 | if (r < 0) { | |
491 | log_warning_link(link, "DHCP error: could not reset MTU"); | |
492 | link_enter_failed(link); | |
493 | return r; | |
494 | } | |
ff254138 | 495 | } |
c07aeadf | 496 | } |
ff254138 | 497 | |
c07aeadf TG |
498 | if (link->network->dhcp_hostname) { |
499 | r = set_hostname(link->manager->bus, ""); | |
500 | if (r < 0) | |
501 | log_error("Failed to reset transient hostname"); | |
502 | } | |
4f882b2a | 503 | |
a6cc569e TG |
504 | link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease); |
505 | ||
c07aeadf TG |
506 | return 0; |
507 | } | |
4f882b2a | 508 | |
c07aeadf | 509 | static int dhcp_lease_acquired(sd_dhcp_client *client, Link *link) { |
a6cc569e | 510 | sd_dhcp_lease *lease; |
c07aeadf TG |
511 | struct in_addr address; |
512 | struct in_addr netmask; | |
513 | struct in_addr gateway; | |
514 | unsigned prefixlen; | |
c07aeadf TG |
515 | struct in_addr *nameservers; |
516 | size_t nameservers_size; | |
517 | int r; | |
1346b1f0 | 518 | |
c07aeadf TG |
519 | assert(client); |
520 | assert(link); | |
ff254138 | 521 | |
a6cc569e TG |
522 | r = sd_dhcp_client_get_lease(client, &lease); |
523 | if (r < 0) { | |
524 | log_warning_link(link, "DHCP error: no lease: %s", | |
525 | strerror(-r)); | |
526 | return r; | |
527 | } | |
528 | ||
529 | r = sd_dhcp_lease_get_address(lease, &address); | |
ff254138 | 530 | if (r < 0) { |
c07aeadf TG |
531 | log_warning_link(link, "DHCP error: no address: %s", |
532 | strerror(-r)); | |
533 | return r; | |
ff254138 TG |
534 | } |
535 | ||
a6cc569e | 536 | r = sd_dhcp_lease_get_netmask(lease, &netmask); |
ff254138 | 537 | if (r < 0) { |
c07aeadf TG |
538 | log_warning_link(link, "DHCP error: no netmask: %s", |
539 | strerror(-r)); | |
540 | return r; | |
ff254138 TG |
541 | } |
542 | ||
377a218f | 543 | prefixlen = net_netmask_to_prefixlen(&netmask); |
ff254138 | 544 | |
a6cc569e | 545 | r = sd_dhcp_lease_get_router(lease, &gateway); |
ff254138 | 546 | if (r < 0) { |
c07aeadf TG |
547 | log_warning_link(link, "DHCP error: no router: %s", |
548 | strerror(-r)); | |
549 | return r; | |
ff254138 TG |
550 | } |
551 | ||
c07aeadf TG |
552 | log_struct_link(LOG_INFO, link, |
553 | "MESSAGE=%s: DHCPv4 address %u.%u.%u.%u/%u via %u.%u.%u.%u", | |
554 | link->ifname, | |
555 | ADDRESS_FMT_VAL(address), | |
556 | prefixlen, | |
557 | ADDRESS_FMT_VAL(gateway), | |
558 | "ADDRESS=%u.%u.%u.%u", | |
559 | ADDRESS_FMT_VAL(address), | |
560 | "PREFIXLEN=%u", | |
561 | prefixlen, | |
562 | "GATEWAY=%u.%u.%u.%u", | |
563 | ADDRESS_FMT_VAL(gateway), | |
564 | NULL); | |
565 | ||
d50cf59b TG |
566 | link->dhcp_lease = lease; |
567 | ||
c07aeadf | 568 | if (link->network->dhcp_dns) { |
a6cc569e | 569 | r = sd_dhcp_lease_get_dns(lease, &nameservers, &nameservers_size); |
c07aeadf TG |
570 | if (r >= 0) { |
571 | r = manager_update_resolv_conf(link->manager); | |
572 | if (r < 0) | |
573 | log_error("Failed to update resolv.conf"); | |
ff254138 | 574 | } |
c07aeadf | 575 | } |
ff254138 | 576 | |
c07aeadf TG |
577 | if (link->network->dhcp_mtu) { |
578 | uint16_t mtu; | |
579 | ||
a6cc569e | 580 | r = sd_dhcp_lease_get_mtu(lease, &mtu); |
c07aeadf TG |
581 | if (r >= 0) { |
582 | r = link_set_mtu(link, mtu); | |
583 | if (r < 0) | |
584 | log_error_link(link, "Failed to set MTU " | |
585 | "to %" PRIu16, mtu); | |
586 | } | |
587 | } | |
ff254138 | 588 | |
c07aeadf TG |
589 | if (link->network->dhcp_hostname) { |
590 | const char *hostname; | |
ff254138 | 591 | |
a6cc569e | 592 | r = sd_dhcp_lease_get_hostname(lease, &hostname); |
c07aeadf TG |
593 | if (r >= 0) { |
594 | r = set_hostname(link->manager->bus, hostname); | |
595 | if (r < 0) | |
596 | log_error("Failed to set transient hostname " | |
597 | "to '%s'", hostname); | |
3bef724f | 598 | } |
c07aeadf | 599 | } |
3bef724f | 600 | |
c07aeadf TG |
601 | link_enter_set_addresses(link); |
602 | ||
603 | return 0; | |
604 | } | |
605 | ||
606 | static void dhcp_handler(sd_dhcp_client *client, int event, void *userdata) { | |
607 | Link *link = userdata; | |
608 | int r; | |
609 | ||
610 | assert(link); | |
611 | assert(link->network); | |
612 | assert(link->manager); | |
613 | ||
614 | if (link->state == LINK_STATE_FAILED) | |
615 | return; | |
616 | ||
617 | switch (event) { | |
618 | case DHCP_EVENT_NO_LEASE: | |
619 | log_debug_link(link, "IP address in use."); | |
620 | break; | |
621 | case DHCP_EVENT_EXPIRED: | |
622 | case DHCP_EVENT_STOP: | |
623 | case DHCP_EVENT_IP_CHANGE: | |
624 | if (link->network->dhcp_critical) { | |
625 | log_error_link(link, "DHCPv4 connection considered system critical, " | |
626 | "ignoring request to reconfigure it."); | |
627 | return; | |
4f882b2a | 628 | } |
4f882b2a | 629 | |
17256461 UTL |
630 | if (link->dhcp_lease) { |
631 | r = dhcp_lease_lost(link); | |
632 | if (r < 0) { | |
633 | link_enter_failed(link); | |
634 | return; | |
635 | } | |
c07aeadf | 636 | } |
1346b1f0 | 637 | |
c07aeadf TG |
638 | if (event == DHCP_EVENT_IP_CHANGE) { |
639 | r = dhcp_lease_acquired(client, link); | |
640 | if (r < 0) { | |
641 | link_enter_failed(link); | |
642 | return; | |
643 | } | |
1346b1f0 | 644 | } |
1346b1f0 | 645 | |
c07aeadf TG |
646 | break; |
647 | case DHCP_EVENT_IP_ACQUIRE: | |
648 | r = dhcp_lease_acquired(client, link); | |
649 | if (r < 0) { | |
650 | link_enter_failed(link); | |
651 | return; | |
652 | } | |
653 | break; | |
654 | default: | |
655 | if (event < 0) | |
656 | log_warning_link(link, "DHCP error: %s", strerror(-event)); | |
657 | else | |
658 | log_warning_link(link, "DHCP unknown event: %d", event); | |
c07aeadf | 659 | break; |
ff254138 TG |
660 | } |
661 | ||
662 | return; | |
663 | } | |
664 | ||
665 | static int link_acquire_conf(Link *link) { | |
666 | int r; | |
667 | ||
668 | assert(link); | |
669 | assert(link->network); | |
670 | assert(link->network->dhcp); | |
671 | assert(link->manager); | |
672 | assert(link->manager->event); | |
673 | ||
a6cc569e TG |
674 | if (!link->dhcp_client) { |
675 | r = sd_dhcp_client_new(&link->dhcp_client); | |
b25ef18b TG |
676 | if (r < 0) |
677 | return r; | |
678 | ||
a6cc569e | 679 | r = sd_dhcp_client_attach_event(link->dhcp_client, NULL, 0); |
b25ef18b TG |
680 | if (r < 0) |
681 | return r; | |
ff254138 | 682 | |
a6cc569e | 683 | r = sd_dhcp_client_set_index(link->dhcp_client, link->ifindex); |
ff254138 TG |
684 | if (r < 0) |
685 | return r; | |
686 | ||
a6cc569e | 687 | r = sd_dhcp_client_set_mac(link->dhcp_client, &link->mac); |
ff254138 TG |
688 | if (r < 0) |
689 | return r; | |
690 | ||
a6cc569e | 691 | r = sd_dhcp_client_set_callback(link->dhcp_client, dhcp_handler, link); |
ff254138 TG |
692 | if (r < 0) |
693 | return r; | |
6fc73498 TG |
694 | |
695 | if (link->network->dhcp_mtu) { | |
a6cc569e | 696 | r = sd_dhcp_client_set_request_option(link->dhcp_client, 26); |
6fc73498 TG |
697 | if (r < 0) |
698 | return r; | |
699 | } | |
ff254138 TG |
700 | } |
701 | ||
ab47d620 TG |
702 | log_debug_link(link, "acquiring DHCPv4 lease"); |
703 | ||
a6cc569e | 704 | r = sd_dhcp_client_start(link->dhcp_client); |
ff254138 TG |
705 | if (r < 0) |
706 | return r; | |
707 | ||
708 | return 0; | |
709 | } | |
710 | ||
711 | static int link_update_flags(Link *link, unsigned flags) { | |
712 | int r; | |
713 | ||
714 | assert(link); | |
715 | assert(link->network); | |
716 | ||
717 | if (link->state == LINK_STATE_FAILED) | |
718 | return 0; | |
719 | ||
efbc88b8 | 720 | if (link->flags == flags) { |
ab47d620 | 721 | log_debug_link(link, "link status unchanged: %#.8x", flags); |
efbc88b8 TG |
722 | return 0; |
723 | } | |
724 | ||
3333d748 ZJS |
725 | if ((link->flags & IFF_UP) != (flags & IFF_UP)) |
726 | log_info_link(link, | |
e6674986 | 727 | "link is %s", flags & IFF_UP ? "up": "down"); |
efbc88b8 TG |
728 | |
729 | if ((link->flags & IFF_LOWER_UP) != (flags & IFF_LOWER_UP)) { | |
730 | if (flags & IFF_LOWER_UP) { | |
39032b87 | 731 | log_info_link(link, "carrier on"); |
efbc88b8 TG |
732 | |
733 | if (link->network->dhcp) { | |
734 | r = link_acquire_conf(link); | |
735 | if (r < 0) { | |
1f6d9bc9 | 736 | log_warning_link(link, "Could not acquire DHCPv4 lease: %s", strerror(-r)); |
efbc88b8 TG |
737 | link_enter_failed(link); |
738 | return r; | |
739 | } | |
ff254138 | 740 | } |
efbc88b8 | 741 | } else { |
39032b87 | 742 | log_info_link(link, "carrier off"); |
efbc88b8 TG |
743 | |
744 | if (link->network->dhcp) { | |
a6cc569e | 745 | r = sd_dhcp_client_stop(link->dhcp_client); |
efbc88b8 | 746 | if (r < 0) { |
1f6d9bc9 | 747 | log_warning_link(link, "Could not stop DHCPv4 client: %s", strerror(-r)); |
efbc88b8 TG |
748 | link_enter_failed(link); |
749 | return r; | |
750 | } | |
ff254138 TG |
751 | } |
752 | } | |
753 | } | |
754 | ||
3333d748 | 755 | log_debug_link(link, |
ab47d620 | 756 | "link status updated: %#.8x -> %#.8x", link->flags, flags); |
efbc88b8 | 757 | |
ff254138 TG |
758 | link->flags = flags; |
759 | ||
760 | return 0; | |
761 | } | |
762 | ||
dd3efc09 TG |
763 | static int link_up_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { |
764 | Link *link = userdata; | |
765 | int r; | |
766 | ||
1746cf2a TG |
767 | assert(link); |
768 | ||
769 | if (link->state == LINK_STATE_FAILED) | |
770 | return 1; | |
771 | ||
dd3efc09 TG |
772 | r = sd_rtnl_message_get_errno(m); |
773 | if (r < 0) { | |
c9ccc19f TG |
774 | log_struct_link(LOG_ERR, link, |
775 | "MESSAGE=%s: could not bring up interface: %s", | |
776 | link->ifname, strerror(-r), | |
777 | "ERRNO=%d", -r, | |
778 | NULL); | |
dd3efc09 | 779 | link_enter_failed(link); |
c9ccc19f | 780 | return 1; |
dd3efc09 | 781 | } |
f882c247 | 782 | |
ff254138 | 783 | link_update_flags(link, link->flags | IFF_UP); |
1746cf2a | 784 | |
f882c247 TG |
785 | return 1; |
786 | } | |
787 | ||
788 | static int link_up(Link *link) { | |
cf6a8911 | 789 | _cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL; |
f579559b TG |
790 | int r; |
791 | ||
f882c247 TG |
792 | assert(link); |
793 | assert(link->manager); | |
794 | assert(link->manager->rtnl); | |
795 | ||
39032b87 | 796 | log_debug_link(link, "bringing link up"); |
449f7554 | 797 | |
4fb7242c TG |
798 | r = sd_rtnl_message_new_link(link->manager->rtnl, RTM_SETLINK, |
799 | link->ifindex, &req); | |
f579559b | 800 | if (r < 0) { |
39032b87 | 801 | log_error_link(link, "Could not allocate RTM_SETLINK message"); |
f579559b TG |
802 | return r; |
803 | } | |
804 | ||
5d4795f3 | 805 | r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP); |
fc25d7f8 | 806 | if (r < 0) { |
3333d748 | 807 | log_error_link(link, "Could not set link flags: %s", strerror(-r)); |
fc25d7f8 TG |
808 | return r; |
809 | } | |
810 | ||
dd3efc09 | 811 | r = sd_rtnl_call_async(link->manager->rtnl, req, link_up_handler, link, 0, NULL); |
f579559b | 812 | if (r < 0) { |
3333d748 ZJS |
813 | log_error_link(link, |
814 | "Could not send rtnetlink message: %s", strerror(-r)); | |
f579559b TG |
815 | return r; |
816 | } | |
817 | ||
f882c247 TG |
818 | return 0; |
819 | } | |
820 | ||
52433f6b | 821 | static int link_enslaved(Link *link) { |
f882c247 TG |
822 | int r; |
823 | ||
ef1ba606 | 824 | assert(link); |
52433f6b | 825 | assert(link->state == LINK_STATE_ENSLAVING); |
f5be5601 | 826 | assert(link->network); |
dd3efc09 | 827 | |
f882c247 | 828 | r = link_up(link); |
ef1ba606 TG |
829 | if (r < 0) { |
830 | link_enter_failed(link); | |
831 | return r; | |
832 | } | |
f882c247 | 833 | |
1746cf2a TG |
834 | if (!link->network->dhcp) |
835 | return link_enter_set_addresses(link); | |
ef1ba606 TG |
836 | |
837 | return 0; | |
02b59d57 TG |
838 | } |
839 | ||
52433f6b | 840 | static int enslave_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { |
02b59d57 TG |
841 | Link *link = userdata; |
842 | int r; | |
843 | ||
1746cf2a | 844 | assert(link); |
52433f6b | 845 | assert(link->state == LINK_STATE_ENSLAVING || link->state == LINK_STATE_FAILED); |
ef1ba606 | 846 | assert(link->network); |
02b59d57 | 847 | |
52433f6b TG |
848 | link->enslaving --; |
849 | ||
02b59d57 TG |
850 | if (link->state == LINK_STATE_FAILED) |
851 | return 1; | |
852 | ||
853 | r = sd_rtnl_message_get_errno(m); | |
ef1ba606 | 854 | if (r < 0) { |
c9ccc19f TG |
855 | log_struct_link(LOG_ERR, link, |
856 | "MESSAGE=%s: could not enslave: %s", | |
857 | link->ifname, strerror(-r), | |
858 | "ERRNO=%d", -r, | |
859 | NULL); | |
ef1ba606 TG |
860 | link_enter_failed(link); |
861 | return 1; | |
3333d748 | 862 | } |
02b59d57 | 863 | |
52433f6b | 864 | log_debug_link(link, "enslaved"); |
ab47d620 | 865 | |
52433f6b TG |
866 | if (link->enslaving == 0) |
867 | link_enslaved(link); | |
02b59d57 TG |
868 | |
869 | return 1; | |
870 | } | |
871 | ||
52433f6b | 872 | static int link_enter_enslave(Link *link) { |
672682a6 TG |
873 | NetDev *vlan; |
874 | Iterator i; | |
02b59d57 TG |
875 | int r; |
876 | ||
877 | assert(link); | |
878 | assert(link->network); | |
ef1ba606 | 879 | assert(link->state == _LINK_STATE_INVALID); |
02b59d57 | 880 | |
52433f6b | 881 | link->state = LINK_STATE_ENSLAVING; |
02b59d57 | 882 | |
63ffa720 TG |
883 | if (!link->network->bridge && !link->network->bond && |
884 | hashmap_isempty(link->network->vlans)) | |
52433f6b | 885 | return link_enslaved(link); |
02b59d57 | 886 | |
52433f6b TG |
887 | if (link->network->bridge) { |
888 | log_struct_link(LOG_DEBUG, link, | |
889 | "MESSAGE=%s: enslaving by '%s'", | |
c9ccc19f | 890 | link->ifname, link->network->bridge->name, |
52433f6b TG |
891 | NETDEV(link->network->bridge), |
892 | NULL); | |
449f7554 | 893 | |
52433f6b TG |
894 | r = netdev_enslave(link->network->bridge, link, &enslave_handler); |
895 | if (r < 0) { | |
896 | log_struct_link(LOG_WARNING, link, | |
897 | "MESSAGE=%s: could not enslave by '%s': %s", | |
c9ccc19f | 898 | link->ifname, link->network->bridge->name, strerror(-r), |
52433f6b TG |
899 | NETDEV(link->network->bridge), |
900 | NULL); | |
901 | link_enter_failed(link); | |
902 | return r; | |
903 | } | |
904 | ||
905 | link->enslaving ++; | |
906 | } | |
907 | ||
672682a6 | 908 | HASHMAP_FOREACH(vlan, link->network->vlans, i) { |
52433f6b TG |
909 | log_struct_link(LOG_DEBUG, link, |
910 | "MESSAGE=%s: enslaving by '%s'", | |
672682a6 | 911 | link->ifname, vlan->name, NETDEV(vlan), NULL); |
52433f6b | 912 | |
672682a6 | 913 | r = netdev_enslave(vlan, link, &enslave_handler); |
52433f6b TG |
914 | if (r < 0) { |
915 | log_struct_link(LOG_WARNING, link, | |
916 | "MESSAGE=%s: could not enslave by '%s': %s", | |
672682a6 TG |
917 | link->ifname, vlan->name, strerror(-r), |
918 | NETDEV(vlan), NULL); | |
52433f6b TG |
919 | link_enter_failed(link); |
920 | return r; | |
921 | } | |
922 | ||
923 | link->enslaving ++; | |
ef1ba606 TG |
924 | } |
925 | ||
926 | return 0; | |
927 | } | |
928 | ||
929 | static int link_get_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { | |
930 | Link *link = userdata; | |
931 | int r; | |
932 | ||
1746cf2a TG |
933 | assert(link); |
934 | ||
935 | if (link->state == LINK_STATE_FAILED) | |
936 | return 1; | |
937 | ||
ef1ba606 TG |
938 | r = sd_rtnl_message_get_errno(m); |
939 | if (r < 0) { | |
c9ccc19f TG |
940 | log_struct_link(LOG_ERR, link, |
941 | "MESSAGE=%s: could not get state: %s", | |
942 | link->ifname, strerror(-r), | |
943 | "ERRNO=%d", -r, | |
944 | NULL); | |
ef1ba606 | 945 | link_enter_failed(link); |
c9ccc19f | 946 | return 1; |
ef1ba606 TG |
947 | } |
948 | ||
39032b87 | 949 | log_debug_link(link, "got link state"); |
1746cf2a | 950 | |
5eb036ca TG |
951 | link_update(link, m); |
952 | ||
ef1ba606 TG |
953 | return 1; |
954 | } | |
955 | ||
956 | static int link_get(Link *link) { | |
cf6a8911 | 957 | _cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL; |
ef1ba606 TG |
958 | int r; |
959 | ||
960 | assert(link); | |
961 | assert(link->manager); | |
962 | assert(link->manager->rtnl); | |
963 | ||
39032b87 | 964 | log_debug_link(link, "requesting link status"); |
449f7554 | 965 | |
4fb7242c TG |
966 | r = sd_rtnl_message_new_link(link->manager->rtnl, RTM_GETLINK, |
967 | link->ifindex, &req); | |
ef1ba606 | 968 | if (r < 0) { |
39032b87 | 969 | log_error_link(link, "Could not allocate RTM_GETLINK message"); |
ef1ba606 TG |
970 | return r; |
971 | } | |
972 | ||
973 | r = sd_rtnl_call_async(link->manager->rtnl, req, link_get_handler, link, 0, NULL); | |
974 | if (r < 0) { | |
3333d748 ZJS |
975 | log_error_link(link, |
976 | "Could not send rtnetlink message: %s", strerror(-r)); | |
ef1ba606 | 977 | return r; |
dd3efc09 | 978 | } |
02b59d57 TG |
979 | |
980 | return 0; | |
981 | } | |
982 | ||
983 | int link_configure(Link *link) { | |
984 | int r; | |
985 | ||
ef1ba606 TG |
986 | assert(link); |
987 | assert(link->network); | |
988 | assert(link->state == _LINK_STATE_INVALID); | |
989 | ||
dd3efc09 | 990 | r = link_get(link); |
ef1ba606 TG |
991 | if (r < 0) { |
992 | link_enter_failed(link); | |
993 | return r; | |
994 | } | |
dd3efc09 | 995 | |
52433f6b | 996 | return link_enter_enslave(link); |
f579559b | 997 | } |
dd3efc09 | 998 | |
22936833 TG |
999 | int link_update(Link *link, sd_rtnl_message *m) { |
1000 | unsigned flags; | |
4f882b2a TG |
1001 | void *data; |
1002 | uint16_t type; | |
22936833 TG |
1003 | int r; |
1004 | ||
dd3efc09 | 1005 | assert(link); |
22936833 TG |
1006 | assert(m); |
1007 | ||
1746cf2a TG |
1008 | if (link->state == LINK_STATE_FAILED) |
1009 | return 0; | |
1010 | ||
22936833 TG |
1011 | r = sd_rtnl_message_link_get_flags(m, &flags); |
1012 | if (r < 0) { | |
4f882b2a | 1013 | log_warning_link(link, "Could not get link flags"); |
22936833 TG |
1014 | return r; |
1015 | } | |
dd3efc09 | 1016 | |
4f882b2a | 1017 | while (sd_rtnl_message_read(m, &type, &data) > 0) { |
396945dc TG |
1018 | if (type == IFLA_MTU && link->network->dhcp && |
1019 | link->network->dhcp_mtu && !link->original_mtu) { | |
4f882b2a | 1020 | link->original_mtu = *(uint16_t *) data; |
396945dc TG |
1021 | log_debug_link(link, "saved original MTU: %" PRIu16, |
1022 | link->original_mtu); | |
4f882b2a TG |
1023 | } |
1024 | } | |
1025 | ||
ff254138 | 1026 | return link_update_flags(link, flags); |
dd3efc09 | 1027 | } |