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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" |
f579559b TG |
29 | |
30 | int link_new(Manager *manager, struct udev_device *device, Link **ret) { | |
31 | _cleanup_link_free_ Link *link = NULL; | |
8cd11a0f | 32 | const char *mac; |
602cc437 | 33 | struct ether_addr *mac_addr; |
c166a070 | 34 | const char *ifname; |
f579559b TG |
35 | int r; |
36 | ||
37 | assert(device); | |
38 | assert(ret); | |
39 | ||
40 | link = new0(Link, 1); | |
41 | if (!link) | |
42 | return -ENOMEM; | |
43 | ||
5a3eb5a7 TG |
44 | link->manager = manager; |
45 | link->state = _LINK_STATE_INVALID; | |
46 | ||
0617ffab TG |
47 | link->ifindex = udev_device_get_ifindex(device); |
48 | if (link->ifindex <= 0) | |
f579559b TG |
49 | return -EINVAL; |
50 | ||
8cd11a0f | 51 | mac = udev_device_get_sysattr_value(device, "address"); |
5a3eb5a7 TG |
52 | if (mac) { |
53 | mac_addr = ether_aton(mac); | |
54 | if (mac_addr) | |
55 | memcpy(&link->mac, mac_addr, sizeof(struct ether_addr)); | |
56 | } | |
f579559b | 57 | |
c166a070 TG |
58 | ifname = udev_device_get_sysname(device); |
59 | link->ifname = strdup(ifname); | |
60 | ||
0617ffab | 61 | r = hashmap_put(manager->links, &link->ifindex, link); |
f579559b TG |
62 | if (r < 0) |
63 | return r; | |
64 | ||
65 | *ret = link; | |
66 | link = NULL; | |
67 | ||
68 | return 0; | |
69 | } | |
70 | ||
71 | void link_free(Link *link) { | |
72 | if (!link) | |
73 | return; | |
74 | ||
0617ffab | 75 | assert(link->manager); |
f579559b | 76 | |
f5be5601 TG |
77 | if (link->dhcp) |
78 | sd_dhcp_client_free(link->dhcp); | |
79 | ||
80 | route_free(link->dhcp_route); | |
81 | link->dhcp_route = NULL; | |
82 | ||
83 | address_free(link->dhcp_address); | |
84 | link->dhcp_address = NULL; | |
85 | ||
0617ffab | 86 | hashmap_remove(link->manager->links, &link->ifindex); |
f579559b | 87 | |
c166a070 TG |
88 | free(link->ifname); |
89 | ||
f579559b TG |
90 | free(link); |
91 | } | |
92 | ||
aa3437a5 | 93 | int link_add(Manager *m, struct udev_device *device, Link **ret) { |
f579559b TG |
94 | Link *link; |
95 | Network *network; | |
96 | int r; | |
97 | uint64_t ifindex; | |
52433f6b | 98 | NetdevKind kind; |
f579559b TG |
99 | |
100 | assert(m); | |
101 | assert(device); | |
102 | ||
103 | ifindex = udev_device_get_ifindex(device); | |
104 | link = hashmap_get(m->links, &ifindex); | |
aa3437a5 TG |
105 | if (link) { |
106 | *ret = link; | |
2672953b | 107 | return -EEXIST; |
aa3437a5 | 108 | } |
f579559b TG |
109 | |
110 | r = link_new(m, device, &link); | |
2672953b | 111 | if (r < 0) |
f579559b | 112 | return r; |
f579559b | 113 | |
aa3437a5 TG |
114 | *ret = link; |
115 | ||
52433f6b TG |
116 | kind = netdev_kind_from_string(udev_device_get_devtype(device)); |
117 | if (kind != _NETDEV_KIND_INVALID) { | |
118 | r = netdev_set_link(m, kind, link); | |
aa3437a5 TG |
119 | if (r < 0 && r != -ENOENT) |
120 | return r; | |
02b59d57 TG |
121 | } |
122 | ||
f579559b TG |
123 | r = network_get(m, device, &network); |
124 | if (r < 0) | |
125 | return r == -ENOENT ? 0 : r; | |
126 | ||
127 | r = network_apply(m, network, link); | |
128 | if (r < 0) | |
129 | return r; | |
130 | ||
131 | return 0; | |
132 | } | |
133 | ||
f882c247 | 134 | static int link_enter_configured(Link *link) { |
ef1ba606 TG |
135 | assert(link); |
136 | assert(link->state == LINK_STATE_SETTING_ROUTES); | |
137 | ||
39032b87 | 138 | log_info_link(link, "link configured"); |
f882c247 TG |
139 | |
140 | link->state = LINK_STATE_CONFIGURED; | |
141 | ||
142 | return 0; | |
143 | } | |
144 | ||
ef1ba606 TG |
145 | static void link_enter_failed(Link *link) { |
146 | assert(link); | |
f882c247 | 147 | |
39032b87 | 148 | log_warning_link(link, "failed"); |
449f7554 | 149 | |
ef1ba606 | 150 | link->state = LINK_STATE_FAILED; |
f882c247 TG |
151 | } |
152 | ||
f882c247 TG |
153 | static int route_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { |
154 | Link *link = userdata; | |
155 | int r; | |
156 | ||
f5be5601 TG |
157 | assert(link->route_messages > 0); |
158 | assert(link->state == LINK_STATE_SETTING_ADDRESSES || | |
159 | link->state == LINK_STATE_SETTING_ROUTES || | |
160 | link->state == LINK_STATE_FAILED); | |
f882c247 | 161 | |
f5be5601 | 162 | link->route_messages --; |
f882c247 TG |
163 | |
164 | if (link->state == LINK_STATE_FAILED) | |
165 | return 1; | |
166 | ||
167 | r = sd_rtnl_message_get_errno(m); | |
c166a070 | 168 | if (r < 0 && r != -EEXIST) |
3333d748 | 169 | log_warning_link(link, "could not set route: %s", strerror(-r)); |
f882c247 | 170 | |
f5be5601 TG |
171 | /* we might have received an old reply after moving back to SETTING_ADDRESSES, |
172 | * ignore it */ | |
173 | if (link->route_messages == 0 && link->state == LINK_STATE_SETTING_ROUTES) { | |
39032b87 | 174 | log_debug_link(link, "routes set"); |
dd3efc09 TG |
175 | link_enter_configured(link); |
176 | } | |
f882c247 TG |
177 | |
178 | return 1; | |
179 | } | |
180 | ||
181 | static int link_enter_set_routes(Link *link) { | |
182 | Route *route; | |
183 | int r; | |
184 | ||
185 | assert(link); | |
186 | assert(link->network); | |
ef1ba606 | 187 | assert(link->state == LINK_STATE_SETTING_ADDRESSES); |
f882c247 | 188 | |
ef1ba606 | 189 | link->state = LINK_STATE_SETTING_ROUTES; |
f882c247 | 190 | |
f5be5601 | 191 | if (!link->network->static_routes && !link->dhcp_route) |
dd3efc09 | 192 | return link_enter_configured(link); |
f882c247 | 193 | |
39032b87 | 194 | log_debug_link(link, "setting routes"); |
449f7554 | 195 | |
f048a16b | 196 | LIST_FOREACH(static_routes, route, link->network->static_routes) { |
f882c247 | 197 | r = route_configure(route, link, &route_handler); |
dd3efc09 | 198 | if (r < 0) { |
3333d748 ZJS |
199 | log_warning_link(link, |
200 | "could not set routes: %s", strerror(-r)); | |
ef1ba606 TG |
201 | link_enter_failed(link); |
202 | return r; | |
dd3efc09 | 203 | } |
c166a070 | 204 | |
f5be5601 TG |
205 | link->route_messages ++; |
206 | } | |
207 | ||
208 | if (link->dhcp_route) { | |
209 | r = route_configure(link->dhcp_route, link, &route_handler); | |
210 | if (r < 0) { | |
3333d748 ZJS |
211 | log_warning_link(link, |
212 | "could not set routes: %s", strerror(-r)); | |
f5be5601 TG |
213 | link_enter_failed(link); |
214 | return r; | |
215 | } | |
216 | ||
217 | link->route_messages ++; | |
f882c247 TG |
218 | } |
219 | ||
220 | return 0; | |
221 | } | |
222 | ||
f882c247 TG |
223 | static int address_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { |
224 | Link *link = userdata; | |
225 | int r; | |
226 | ||
f5be5601 TG |
227 | assert(m); |
228 | assert(link); | |
229 | assert(link->ifname); | |
230 | assert(link->addr_messages > 0); | |
ef1ba606 | 231 | assert(link->state == LINK_STATE_SETTING_ADDRESSES || link->state == LINK_STATE_FAILED); |
f882c247 | 232 | |
f5be5601 | 233 | link->addr_messages --; |
f882c247 TG |
234 | |
235 | if (link->state == LINK_STATE_FAILED) | |
236 | return 1; | |
237 | ||
238 | r = sd_rtnl_message_get_errno(m); | |
c166a070 | 239 | if (r < 0 && r != -EEXIST) |
3333d748 ZJS |
240 | log_struct_link(LOG_ERR, link, |
241 | "MESSAGE=%s: could not set address: %s", | |
242 | link->ifname, strerror(-r), | |
243 | "ERRNO=%d", -r, | |
244 | NULL); | |
f882c247 | 245 | |
f5be5601 | 246 | if (link->addr_messages == 0) { |
39032b87 | 247 | log_debug_link(link, "addresses set"); |
ef1ba606 | 248 | link_enter_set_routes(link); |
dd3efc09 | 249 | } |
f882c247 TG |
250 | |
251 | return 1; | |
252 | } | |
253 | ||
254 | static int link_enter_set_addresses(Link *link) { | |
255 | Address *address; | |
256 | int r; | |
257 | ||
258 | assert(link); | |
259 | assert(link->network); | |
f5be5601 | 260 | assert(link->state != _LINK_STATE_INVALID); |
f882c247 | 261 | |
ef1ba606 | 262 | link->state = LINK_STATE_SETTING_ADDRESSES; |
f882c247 | 263 | |
f5be5601 | 264 | if (!link->network->static_addresses && !link->dhcp_address) |
ef1ba606 | 265 | return link_enter_set_routes(link); |
f882c247 | 266 | |
39032b87 | 267 | log_debug_link(link, "setting addresses"); |
449f7554 | 268 | |
f048a16b | 269 | LIST_FOREACH(static_addresses, address, link->network->static_addresses) { |
f882c247 | 270 | r = address_configure(address, link, &address_handler); |
dd3efc09 | 271 | if (r < 0) { |
3333d748 ZJS |
272 | log_warning_link(link, |
273 | "could not set addresses: %s", strerror(-r)); | |
ef1ba606 TG |
274 | link_enter_failed(link); |
275 | return r; | |
dd3efc09 | 276 | } |
c166a070 | 277 | |
f5be5601 TG |
278 | link->addr_messages ++; |
279 | } | |
280 | ||
281 | if (link->dhcp_address) { | |
282 | r = address_configure(link->dhcp_address, link, &address_handler); | |
283 | if (r < 0) { | |
3333d748 ZJS |
284 | log_warning_link(link, |
285 | "could not set addresses: %s", strerror(-r)); | |
f5be5601 TG |
286 | link_enter_failed(link); |
287 | return r; | |
288 | } | |
289 | ||
290 | link->addr_messages ++; | |
f882c247 TG |
291 | } |
292 | ||
293 | return 0; | |
294 | } | |
295 | ||
ff254138 TG |
296 | static int address_drop_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { |
297 | Link *link = userdata; | |
298 | int r; | |
299 | ||
300 | assert(m); | |
301 | assert(link); | |
302 | assert(link->ifname); | |
303 | ||
304 | if (link->state == LINK_STATE_FAILED) | |
305 | return 1; | |
306 | ||
307 | r = sd_rtnl_message_get_errno(m); | |
308 | if (r < 0 && r != -EEXIST) | |
3333d748 | 309 | log_warning_link(link, "could not drop address: %s", strerror(-r)); |
ff254138 TG |
310 | |
311 | return 1; | |
312 | } | |
313 | ||
1346b1f0 TG |
314 | static int set_hostname_handler(sd_bus *bus, sd_bus_message *m, void *userdata, sd_bus_error *ret_error) { |
315 | int r; | |
316 | ||
317 | r = sd_bus_message_get_errno(m); | |
318 | if (r < 0) | |
319 | log_warning("Could not set hostname: %s", strerror(-r)); | |
320 | ||
321 | return 1; | |
322 | } | |
323 | ||
324 | static int set_hostname(sd_bus *bus, const char *hostname) { | |
325 | _cleanup_bus_message_unref_ sd_bus_message *m = NULL; | |
326 | int r = 0; | |
327 | ||
1346b1f0 TG |
328 | assert(hostname); |
329 | ||
330 | log_debug("Setting transient hostname: '%s'", hostname); | |
331 | ||
bcbca829 TG |
332 | if (!bus) { /* TODO: replace by assert when we can rely on kdbus */ |
333 | log_info("Not connected to system bus, ignoring transient hostname."); | |
334 | return 0; | |
335 | } | |
336 | ||
1346b1f0 TG |
337 | r = sd_bus_message_new_method_call( |
338 | bus, | |
339 | "org.freedesktop.hostname1", | |
340 | "/org/freedesktop/hostname1", | |
341 | "org.freedesktop.hostname1", | |
342 | "SetHostname", | |
343 | &m); | |
344 | if (r < 0) | |
345 | return r; | |
346 | ||
347 | r = sd_bus_message_append(m, "sb", hostname, false); | |
348 | if (r < 0) | |
349 | return r; | |
350 | ||
351 | r = sd_bus_call_async(bus, m, set_hostname_handler, NULL, 0, NULL); | |
352 | if (r < 0) | |
353 | log_error("Could not set transient hostname: %s", strerror(-r)); | |
354 | ||
355 | return r; | |
356 | } | |
357 | ||
4f882b2a TG |
358 | static int set_mtu_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { |
359 | Link *link = userdata; | |
360 | int r; | |
361 | ||
362 | assert(m); | |
363 | assert(link); | |
364 | assert(link->ifname); | |
365 | ||
366 | if (link->state == LINK_STATE_FAILED) | |
367 | return 1; | |
368 | ||
369 | r = sd_rtnl_message_get_errno(m); | |
370 | if (r < 0 && r != -EEXIST) | |
371 | log_warning_link(link, "Could not set MTU: %s", strerror(-r)); | |
372 | ||
373 | return 1; | |
374 | } | |
375 | ||
376 | static int link_set_mtu(Link *link, uint32_t mtu) { | |
377 | _cleanup_sd_rtnl_message_unref_ sd_rtnl_message *req = NULL; | |
378 | int r; | |
379 | ||
380 | assert(link); | |
381 | assert(link->manager); | |
382 | assert(link->manager->rtnl); | |
383 | ||
384 | log_debug_link(link, "setting MTU: %" PRIu32, mtu); | |
385 | ||
386 | r = sd_rtnl_message_link_new(RTM_SETLINK, link->ifindex, &req); | |
387 | if (r < 0) { | |
388 | log_error_link(link, "Could not allocate RTM_SETLINK message"); | |
389 | return r; | |
390 | } | |
391 | ||
392 | r = sd_rtnl_message_append_u32(req, IFLA_MTU, mtu); | |
393 | if (r < 0) { | |
394 | log_error_link(link, "Could not append MTU: %s", strerror(-r)); | |
395 | return r; | |
396 | } | |
397 | ||
398 | r = sd_rtnl_call_async(link->manager->rtnl, req, set_mtu_handler, link, 0, NULL); | |
399 | if (r < 0) { | |
400 | log_error_link(link, | |
401 | "Could not send rtnetlink message: %s", strerror(-r)); | |
402 | return r; | |
403 | } | |
404 | ||
405 | return 0; | |
406 | } | |
407 | ||
ff254138 TG |
408 | static void dhcp_handler(sd_dhcp_client *client, int event, void *userdata) { |
409 | Link *link = userdata; | |
410 | struct in_addr address; | |
411 | struct in_addr netmask; | |
412 | struct in_addr gateway; | |
413 | int prefixlen; | |
414 | int r; | |
415 | ||
416 | assert(link); | |
5be4d38e | 417 | assert(link->network); |
1346b1f0 | 418 | assert(link->manager); |
ff254138 TG |
419 | |
420 | if (link->state == LINK_STATE_FAILED) | |
421 | return; | |
422 | ||
423 | if (event < 0) { | |
3333d748 | 424 | log_warning_link(link, "DHCP error: %s", strerror(-event)); |
ff254138 TG |
425 | link_enter_failed(link); |
426 | return; | |
427 | } | |
428 | ||
429 | if (event == DHCP_EVENT_NO_LEASE) | |
39032b87 | 430 | log_debug_link(link, "IP address in use."); |
ff254138 TG |
431 | |
432 | if (event == DHCP_EVENT_IP_CHANGE || event == DHCP_EVENT_EXPIRED || | |
433 | event == DHCP_EVENT_STOP) { | |
434 | if (link->dhcp_address) { | |
435 | address_drop(link->dhcp_address, link, address_drop_handler); | |
436 | ||
437 | address_free(link->dhcp_address); | |
438 | link->dhcp_address = NULL; | |
439 | } | |
440 | ||
441 | if (link->dhcp_route) { | |
442 | route_free(link->dhcp_route); | |
443 | link->dhcp_route = NULL; | |
444 | } | |
4f882b2a TG |
445 | |
446 | if (link->network->dhcp_mtu) { | |
447 | uint16_t mtu; | |
448 | ||
449 | r = sd_dhcp_client_get_mtu(client, &mtu); | |
450 | if (r >= 0 && link->original_mtu != mtu) { | |
451 | r = link_set_mtu(link, link->original_mtu); | |
452 | if (r < 0) { | |
453 | log_warning_link(link, "DHCP error: could not reset MTU"); | |
454 | link_enter_failed(link); | |
455 | return; | |
456 | } | |
457 | } | |
458 | } | |
1346b1f0 TG |
459 | |
460 | if (link->network->dhcp_hostname) { | |
461 | r = set_hostname(link->manager->bus, ""); | |
462 | if (r < 0) | |
463 | log_error("Failed to reset transient hostname"); | |
464 | } | |
ff254138 TG |
465 | } |
466 | ||
467 | r = sd_dhcp_client_get_address(client, &address); | |
468 | if (r < 0) { | |
39032b87 | 469 | log_warning_link(link, "DHCP error: no address"); |
ff254138 TG |
470 | link_enter_failed(link); |
471 | return; | |
472 | } | |
473 | ||
474 | r = sd_dhcp_client_get_netmask(client, &netmask); | |
475 | if (r < 0) { | |
39032b87 | 476 | log_warning_link(link, "DHCP error: no netmask"); |
ff254138 TG |
477 | link_enter_failed(link); |
478 | return; | |
479 | } | |
480 | ||
481 | prefixlen = sd_dhcp_client_prefixlen(&netmask); | |
482 | if (prefixlen < 0) { | |
39032b87 | 483 | log_warning_link(link, "DHCP error: no prefixlen"); |
ff254138 TG |
484 | link_enter_failed(link); |
485 | return; | |
486 | } | |
487 | ||
488 | r = sd_dhcp_client_get_router(client, &gateway); | |
489 | if (r < 0) { | |
39032b87 | 490 | log_warning_link(link, "DHCP error: no router"); |
ff254138 TG |
491 | link_enter_failed(link); |
492 | return; | |
493 | } | |
494 | ||
495 | if (event == DHCP_EVENT_IP_CHANGE || event == DHCP_EVENT_IP_ACQUIRE) { | |
496 | _cleanup_address_free_ Address *addr = NULL; | |
497 | _cleanup_route_free_ Route *rt = NULL; | |
7ae4ef6d TG |
498 | struct in_addr *nameservers; |
499 | size_t nameservers_size; | |
ff254138 | 500 | |
62870613 ZJS |
501 | log_struct_link(LOG_INFO, link, |
502 | "MESSAGE=%s: DHCPv4 address %u.%u.%u.%u/%u via %u.%u.%u.%u", | |
503 | link->ifname, | |
504 | ADDRESS_FMT_VAL(address), | |
505 | prefixlen, | |
506 | ADDRESS_FMT_VAL(gateway), | |
507 | "ADDRESS=%u.%u.%u.%u", | |
508 | ADDRESS_FMT_VAL(address), | |
509 | "PREFIXLEN=%u", | |
510 | prefixlen, | |
511 | "GATEWAY=%u.%u.%u.%u", | |
512 | ADDRESS_FMT_VAL(gateway), | |
513 | NULL); | |
ff254138 TG |
514 | |
515 | r = address_new_dynamic(&addr); | |
516 | if (r < 0) { | |
39032b87 | 517 | log_error_link(link, "Could not allocate address"); |
ff254138 TG |
518 | link_enter_failed(link); |
519 | return; | |
520 | } | |
521 | ||
522 | addr->family = AF_INET; | |
523 | addr->in_addr.in = address; | |
524 | addr->prefixlen = prefixlen; | |
525 | addr->netmask = netmask; | |
526 | ||
527 | r = route_new_dynamic(&rt); | |
528 | if (r < 0) { | |
39032b87 | 529 | log_error_link(link, "Could not allocate route"); |
ff254138 TG |
530 | link_enter_failed(link); |
531 | return; | |
532 | } | |
533 | ||
534 | rt->family = AF_INET; | |
535 | rt->in_addr.in = gateway; | |
536 | ||
537 | link->dhcp_address = addr; | |
538 | link->dhcp_route = rt; | |
539 | addr = NULL; | |
540 | rt = NULL; | |
541 | ||
5be4d38e | 542 | if (link->network->dhcp_dns) { |
7ae4ef6d | 543 | r = sd_dhcp_client_get_dns(client, &nameservers, &nameservers_size); |
5be4d38e TG |
544 | if (r >= 0) { |
545 | r = manager_update_resolv_conf(link->manager); | |
546 | if (r < 0) | |
547 | log_error("Failed to update resolv.conf"); | |
548 | } | |
3bef724f TG |
549 | } |
550 | ||
4f882b2a TG |
551 | if (link->network->dhcp_mtu) { |
552 | uint16_t mtu; | |
553 | ||
554 | r = sd_dhcp_client_get_mtu(client, &mtu); | |
555 | if (r >= 0) { | |
556 | r = link_set_mtu(link, mtu); | |
557 | if (r < 0) | |
558 | log_error_link(link, "Failed to set MTU " | |
559 | "to %" PRIu16, mtu); | |
560 | } | |
561 | } | |
562 | ||
1346b1f0 TG |
563 | if (link->network->dhcp_hostname) { |
564 | const char *hostname; | |
565 | ||
566 | r = sd_dhcp_client_get_hostname(client, &hostname); | |
567 | if (r >= 0) { | |
568 | r = set_hostname(link->manager->bus, hostname); | |
569 | if (r < 0) | |
570 | log_error("Failed to set transient hostname " | |
571 | "to '%s'", hostname); | |
572 | } | |
573 | } | |
574 | ||
ff254138 TG |
575 | link_enter_set_addresses(link); |
576 | } | |
577 | ||
578 | return; | |
579 | } | |
580 | ||
581 | static int link_acquire_conf(Link *link) { | |
582 | int r; | |
583 | ||
584 | assert(link); | |
585 | assert(link->network); | |
586 | assert(link->network->dhcp); | |
587 | assert(link->manager); | |
588 | assert(link->manager->event); | |
589 | ||
590 | if (!link->dhcp) { | |
b25ef18b TG |
591 | r = sd_dhcp_client_new(&link->dhcp); |
592 | if (r < 0) | |
593 | return r; | |
594 | ||
595 | r = sd_dhcp_client_attach_event(link->dhcp, NULL, 0); | |
596 | if (r < 0) | |
597 | return r; | |
ff254138 TG |
598 | |
599 | r = sd_dhcp_client_set_index(link->dhcp, link->ifindex); | |
600 | if (r < 0) | |
601 | return r; | |
602 | ||
603 | r = sd_dhcp_client_set_mac(link->dhcp, &link->mac); | |
604 | if (r < 0) | |
605 | return r; | |
606 | ||
607 | r = sd_dhcp_client_set_callback(link->dhcp, dhcp_handler, link); | |
608 | if (r < 0) | |
609 | return r; | |
6fc73498 TG |
610 | |
611 | if (link->network->dhcp_mtu) { | |
612 | r = sd_dhcp_client_set_request_option(link->dhcp, 26); | |
613 | if (r < 0) | |
614 | return r; | |
615 | } | |
ff254138 TG |
616 | } |
617 | ||
ab47d620 TG |
618 | log_debug_link(link, "acquiring DHCPv4 lease"); |
619 | ||
ff254138 TG |
620 | r = sd_dhcp_client_start(link->dhcp); |
621 | if (r < 0) | |
622 | return r; | |
623 | ||
624 | return 0; | |
625 | } | |
626 | ||
627 | static int link_update_flags(Link *link, unsigned flags) { | |
628 | int r; | |
629 | ||
630 | assert(link); | |
631 | assert(link->network); | |
632 | ||
633 | if (link->state == LINK_STATE_FAILED) | |
634 | return 0; | |
635 | ||
efbc88b8 | 636 | if (link->flags == flags) { |
ab47d620 | 637 | log_debug_link(link, "link status unchanged: %#.8x", flags); |
efbc88b8 TG |
638 | return 0; |
639 | } | |
640 | ||
3333d748 ZJS |
641 | if ((link->flags & IFF_UP) != (flags & IFF_UP)) |
642 | log_info_link(link, | |
e6674986 | 643 | "link is %s", flags & IFF_UP ? "up": "down"); |
efbc88b8 TG |
644 | |
645 | if ((link->flags & IFF_LOWER_UP) != (flags & IFF_LOWER_UP)) { | |
646 | if (flags & IFF_LOWER_UP) { | |
39032b87 | 647 | log_info_link(link, "carrier on"); |
efbc88b8 TG |
648 | |
649 | if (link->network->dhcp) { | |
650 | r = link_acquire_conf(link); | |
651 | if (r < 0) { | |
1f6d9bc9 | 652 | log_warning_link(link, "Could not acquire DHCPv4 lease: %s", strerror(-r)); |
efbc88b8 TG |
653 | link_enter_failed(link); |
654 | return r; | |
655 | } | |
ff254138 | 656 | } |
efbc88b8 | 657 | } else { |
39032b87 | 658 | log_info_link(link, "carrier off"); |
efbc88b8 TG |
659 | |
660 | if (link->network->dhcp) { | |
661 | r = sd_dhcp_client_stop(link->dhcp); | |
662 | if (r < 0) { | |
1f6d9bc9 | 663 | log_warning_link(link, "Could not stop DHCPv4 client: %s", strerror(-r)); |
efbc88b8 TG |
664 | link_enter_failed(link); |
665 | return r; | |
666 | } | |
ff254138 TG |
667 | } |
668 | } | |
669 | } | |
670 | ||
3333d748 | 671 | log_debug_link(link, |
ab47d620 | 672 | "link status updated: %#.8x -> %#.8x", link->flags, flags); |
efbc88b8 | 673 | |
ff254138 TG |
674 | link->flags = flags; |
675 | ||
676 | return 0; | |
677 | } | |
678 | ||
dd3efc09 TG |
679 | static int link_up_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { |
680 | Link *link = userdata; | |
681 | int r; | |
682 | ||
1746cf2a TG |
683 | assert(link); |
684 | ||
685 | if (link->state == LINK_STATE_FAILED) | |
686 | return 1; | |
687 | ||
dd3efc09 TG |
688 | r = sd_rtnl_message_get_errno(m); |
689 | if (r < 0) { | |
3333d748 ZJS |
690 | log_warning_link(link, |
691 | "could not bring up interface: %s", strerror(-r)); | |
dd3efc09 TG |
692 | link_enter_failed(link); |
693 | } | |
f882c247 | 694 | |
ff254138 | 695 | link_update_flags(link, link->flags | IFF_UP); |
1746cf2a | 696 | |
f882c247 TG |
697 | return 1; |
698 | } | |
699 | ||
700 | static int link_up(Link *link) { | |
f579559b TG |
701 | _cleanup_sd_rtnl_message_unref_ sd_rtnl_message *req = NULL; |
702 | int r; | |
703 | ||
f882c247 TG |
704 | assert(link); |
705 | assert(link->manager); | |
706 | assert(link->manager->rtnl); | |
707 | ||
39032b87 | 708 | log_debug_link(link, "bringing link up"); |
449f7554 | 709 | |
0f49a5f7 | 710 | r = sd_rtnl_message_link_new(RTM_SETLINK, link->ifindex, &req); |
f579559b | 711 | if (r < 0) { |
39032b87 | 712 | log_error_link(link, "Could not allocate RTM_SETLINK message"); |
f579559b TG |
713 | return r; |
714 | } | |
715 | ||
5d4795f3 | 716 | r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP); |
fc25d7f8 | 717 | if (r < 0) { |
3333d748 | 718 | log_error_link(link, "Could not set link flags: %s", strerror(-r)); |
fc25d7f8 TG |
719 | return r; |
720 | } | |
721 | ||
dd3efc09 | 722 | r = sd_rtnl_call_async(link->manager->rtnl, req, link_up_handler, link, 0, NULL); |
f579559b | 723 | if (r < 0) { |
3333d748 ZJS |
724 | log_error_link(link, |
725 | "Could not send rtnetlink message: %s", strerror(-r)); | |
f579559b TG |
726 | return r; |
727 | } | |
728 | ||
f882c247 TG |
729 | return 0; |
730 | } | |
731 | ||
52433f6b | 732 | static int link_enslaved(Link *link) { |
f882c247 TG |
733 | int r; |
734 | ||
ef1ba606 | 735 | assert(link); |
52433f6b | 736 | assert(link->state == LINK_STATE_ENSLAVING); |
f5be5601 | 737 | assert(link->network); |
dd3efc09 | 738 | |
f882c247 | 739 | r = link_up(link); |
ef1ba606 TG |
740 | if (r < 0) { |
741 | link_enter_failed(link); | |
742 | return r; | |
743 | } | |
f882c247 | 744 | |
1746cf2a TG |
745 | if (!link->network->dhcp) |
746 | return link_enter_set_addresses(link); | |
ef1ba606 TG |
747 | |
748 | return 0; | |
02b59d57 TG |
749 | } |
750 | ||
52433f6b | 751 | static int enslave_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { |
02b59d57 TG |
752 | Link *link = userdata; |
753 | int r; | |
754 | ||
1746cf2a | 755 | assert(link); |
52433f6b | 756 | assert(link->state == LINK_STATE_ENSLAVING || link->state == LINK_STATE_FAILED); |
ef1ba606 | 757 | assert(link->network); |
02b59d57 | 758 | |
52433f6b TG |
759 | link->enslaving --; |
760 | ||
02b59d57 TG |
761 | if (link->state == LINK_STATE_FAILED) |
762 | return 1; | |
763 | ||
764 | r = sd_rtnl_message_get_errno(m); | |
ef1ba606 | 765 | if (r < 0) { |
52433f6b TG |
766 | log_error_link(link, "could not enslave: %s", |
767 | strerror(-r)); | |
ef1ba606 TG |
768 | link_enter_failed(link); |
769 | return 1; | |
3333d748 | 770 | } |
02b59d57 | 771 | |
52433f6b | 772 | log_debug_link(link, "enslaved"); |
ab47d620 | 773 | |
52433f6b TG |
774 | if (link->enslaving == 0) |
775 | link_enslaved(link); | |
02b59d57 TG |
776 | |
777 | return 1; | |
778 | } | |
779 | ||
52433f6b | 780 | static int link_enter_enslave(Link *link) { |
02b59d57 TG |
781 | int r; |
782 | ||
783 | assert(link); | |
784 | assert(link->network); | |
ef1ba606 | 785 | assert(link->state == _LINK_STATE_INVALID); |
02b59d57 | 786 | |
52433f6b | 787 | link->state = LINK_STATE_ENSLAVING; |
02b59d57 | 788 | |
54abf461 | 789 | if (!link->network->bridge && !link->network->bond && !link->network->vlan) |
52433f6b | 790 | return link_enslaved(link); |
02b59d57 | 791 | |
52433f6b TG |
792 | if (link->network->bridge) { |
793 | log_struct_link(LOG_DEBUG, link, | |
794 | "MESSAGE=%s: enslaving by '%s'", | |
795 | link->network->bridge->name, | |
796 | NETDEV(link->network->bridge), | |
797 | NULL); | |
449f7554 | 798 | |
52433f6b TG |
799 | r = netdev_enslave(link->network->bridge, link, &enslave_handler); |
800 | if (r < 0) { | |
801 | log_struct_link(LOG_WARNING, link, | |
802 | "MESSAGE=%s: could not enslave by '%s': %s", | |
803 | link->network->bridge->name, strerror(-r), | |
804 | NETDEV(link->network->bridge), | |
805 | NULL); | |
806 | link_enter_failed(link); | |
807 | return r; | |
808 | } | |
809 | ||
810 | link->enslaving ++; | |
811 | } | |
812 | ||
54abf461 | 813 | if (link->network->vlan) { |
52433f6b TG |
814 | log_struct_link(LOG_DEBUG, link, |
815 | "MESSAGE=%s: enslaving by '%s'", | |
54abf461 TG |
816 | link->network->vlan->name, |
817 | NETDEV(link->network->vlan), | |
3333d748 | 818 | NULL); |
52433f6b | 819 | |
54abf461 | 820 | r = netdev_enslave(link->network->vlan, link, &enslave_handler); |
52433f6b TG |
821 | if (r < 0) { |
822 | log_struct_link(LOG_WARNING, link, | |
823 | "MESSAGE=%s: could not enslave by '%s': %s", | |
54abf461 TG |
824 | link->network->vlan->name, strerror(-r), |
825 | NETDEV(link->network->vlan), | |
52433f6b TG |
826 | NULL); |
827 | link_enter_failed(link); | |
828 | return r; | |
829 | } | |
830 | ||
831 | link->enslaving ++; | |
ef1ba606 TG |
832 | } |
833 | ||
834 | return 0; | |
835 | } | |
836 | ||
837 | static int link_get_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { | |
838 | Link *link = userdata; | |
839 | int r; | |
840 | ||
1746cf2a TG |
841 | assert(link); |
842 | ||
843 | if (link->state == LINK_STATE_FAILED) | |
844 | return 1; | |
845 | ||
ef1ba606 TG |
846 | r = sd_rtnl_message_get_errno(m); |
847 | if (r < 0) { | |
3333d748 | 848 | log_warning_link(link, "could not get state: %s", strerror(-r)); |
ef1ba606 TG |
849 | link_enter_failed(link); |
850 | } | |
851 | ||
39032b87 | 852 | log_debug_link(link, "got link state"); |
1746cf2a | 853 | |
5eb036ca TG |
854 | link_update(link, m); |
855 | ||
ef1ba606 TG |
856 | return 1; |
857 | } | |
858 | ||
859 | static int link_get(Link *link) { | |
860 | _cleanup_sd_rtnl_message_unref_ sd_rtnl_message *req = NULL; | |
861 | int r; | |
862 | ||
863 | assert(link); | |
864 | assert(link->manager); | |
865 | assert(link->manager->rtnl); | |
866 | ||
39032b87 | 867 | log_debug_link(link, "requesting link status"); |
449f7554 | 868 | |
ef1ba606 TG |
869 | r = sd_rtnl_message_link_new(RTM_GETLINK, link->ifindex, &req); |
870 | if (r < 0) { | |
39032b87 | 871 | log_error_link(link, "Could not allocate RTM_GETLINK message"); |
ef1ba606 TG |
872 | return r; |
873 | } | |
874 | ||
875 | r = sd_rtnl_call_async(link->manager->rtnl, req, link_get_handler, link, 0, NULL); | |
876 | if (r < 0) { | |
3333d748 ZJS |
877 | log_error_link(link, |
878 | "Could not send rtnetlink message: %s", strerror(-r)); | |
ef1ba606 | 879 | return r; |
dd3efc09 | 880 | } |
02b59d57 TG |
881 | |
882 | return 0; | |
883 | } | |
884 | ||
885 | int link_configure(Link *link) { | |
886 | int r; | |
887 | ||
ef1ba606 TG |
888 | assert(link); |
889 | assert(link->network); | |
890 | assert(link->state == _LINK_STATE_INVALID); | |
891 | ||
dd3efc09 | 892 | r = link_get(link); |
ef1ba606 TG |
893 | if (r < 0) { |
894 | link_enter_failed(link); | |
895 | return r; | |
896 | } | |
dd3efc09 | 897 | |
52433f6b | 898 | return link_enter_enslave(link); |
f579559b | 899 | } |
dd3efc09 | 900 | |
22936833 TG |
901 | int link_update(Link *link, sd_rtnl_message *m) { |
902 | unsigned flags; | |
4f882b2a TG |
903 | void *data; |
904 | uint16_t type; | |
22936833 TG |
905 | int r; |
906 | ||
dd3efc09 | 907 | assert(link); |
22936833 TG |
908 | assert(m); |
909 | ||
1746cf2a TG |
910 | if (link->state == LINK_STATE_FAILED) |
911 | return 0; | |
912 | ||
22936833 TG |
913 | r = sd_rtnl_message_link_get_flags(m, &flags); |
914 | if (r < 0) { | |
4f882b2a | 915 | log_warning_link(link, "Could not get link flags"); |
22936833 TG |
916 | return r; |
917 | } | |
dd3efc09 | 918 | |
4f882b2a | 919 | while (sd_rtnl_message_read(m, &type, &data) > 0) { |
396945dc TG |
920 | if (type == IFLA_MTU && link->network->dhcp && |
921 | link->network->dhcp_mtu && !link->original_mtu) { | |
4f882b2a | 922 | link->original_mtu = *(uint16_t *) data; |
396945dc TG |
923 | log_debug_link(link, "saved original MTU: %" PRIu16, |
924 | link->original_mtu); | |
4f882b2a TG |
925 | } |
926 | } | |
927 | ||
ff254138 | 928 | return link_update_flags(link, flags); |
dd3efc09 | 929 | } |