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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> | |
4cc7a82c | 24 | #include <unistd.h> |
f579559b | 25 | |
f579559b | 26 | #include "util.h" |
505f8da7 | 27 | #include "virt.h" |
5a8bcb67 | 28 | #include "fileio.h" |
fe027299 | 29 | #include "socket-util.h" |
1346b1f0 | 30 | #include "bus-util.h" |
5a8bcb67 | 31 | #include "udev-util.h" |
c6f7c917 | 32 | #include "network-internal.h" |
5a8bcb67 LP |
33 | #include "networkd-link.h" |
34 | #include "networkd-netdev.h" | |
fe8db0c5 | 35 | |
a97dcc12 | 36 | bool link_dhcp6_enabled(Link *link) { |
78c958f8 TG |
37 | if (link->flags & IFF_LOOPBACK) |
38 | return false; | |
39 | ||
40 | if (!link->network) | |
41 | return false; | |
42 | ||
e0ee46f2 | 43 | return link->network->dhcp & ADDRESS_FAMILY_IPV6; |
78c958f8 TG |
44 | } |
45 | ||
a97dcc12 | 46 | bool link_dhcp4_enabled(Link *link) { |
78c958f8 TG |
47 | if (link->flags & IFF_LOOPBACK) |
48 | return false; | |
49 | ||
50 | if (!link->network) | |
51 | return false; | |
52 | ||
e0ee46f2 | 53 | return link->network->dhcp & ADDRESS_FAMILY_IPV4; |
78c958f8 TG |
54 | } |
55 | ||
a97dcc12 | 56 | bool link_dhcp4_server_enabled(Link *link) { |
78c958f8 TG |
57 | if (link->flags & IFF_LOOPBACK) |
58 | return false; | |
59 | ||
60 | if (!link->network) | |
61 | return false; | |
62 | ||
63 | return link->network->dhcp_server; | |
64 | } | |
65 | ||
a97dcc12 | 66 | bool link_ipv4ll_enabled(Link *link) { |
78c958f8 TG |
67 | if (link->flags & IFF_LOOPBACK) |
68 | return false; | |
69 | ||
70 | if (!link->network) | |
71 | return false; | |
72 | ||
e0ee46f2 | 73 | return link->network->link_local & ADDRESS_FAMILY_IPV4; |
d0d6a4cd TG |
74 | } |
75 | ||
76 | bool link_ipv6ll_enabled(Link *link) { | |
77 | if (link->flags & IFF_LOOPBACK) | |
78 | return false; | |
79 | ||
80 | if (!link->network) | |
81 | return false; | |
82 | ||
e0ee46f2 | 83 | return link->network->link_local & ADDRESS_FAMILY_IPV6; |
78c958f8 TG |
84 | } |
85 | ||
a97dcc12 | 86 | bool link_lldp_enabled(Link *link) { |
ce43e484 SS |
87 | if (link->flags & IFF_LOOPBACK) |
88 | return false; | |
89 | ||
90 | if (!link->network) | |
91 | return false; | |
92 | ||
5a8bcb67 | 93 | if (link->network->bridge) |
ce43e484 SS |
94 | return false; |
95 | ||
96 | return link->network->lldp; | |
97 | } | |
98 | ||
769d324c | 99 | static bool link_ipv4_forward_enabled(Link *link) { |
5a8bcb67 LP |
100 | if (link->flags & IFF_LOOPBACK) |
101 | return false; | |
102 | ||
103 | if (!link->network) | |
104 | return false; | |
105 | ||
e0ee46f2 | 106 | return link->network->ip_forward & ADDRESS_FAMILY_IPV4; |
769d324c LP |
107 | } |
108 | ||
109 | static bool link_ipv6_forward_enabled(Link *link) { | |
110 | if (link->flags & IFF_LOOPBACK) | |
111 | return false; | |
112 | ||
113 | if (!link->network) | |
114 | return false; | |
115 | ||
e0ee46f2 | 116 | return link->network->ip_forward & ADDRESS_FAMILY_IPV6; |
5a8bcb67 LP |
117 | } |
118 | ||
1f0d9695 | 119 | static IPv6PrivacyExtensions link_ipv6_privacy_extensions(Link *link) { |
49092e22 | 120 | if (link->flags & IFF_LOOPBACK) |
1f0d9695 | 121 | return _IPV6_PRIVACY_EXTENSIONS_INVALID; |
49092e22 SS |
122 | |
123 | if (!link->network) | |
1f0d9695 | 124 | return _IPV6_PRIVACY_EXTENSIONS_INVALID; |
49092e22 SS |
125 | |
126 | return link->network->ipv6_privacy_extensions; | |
127 | } | |
128 | ||
51d18171 TG |
129 | #define FLAG_STRING(string, flag, old, new) \ |
130 | (((old ^ new) & flag) \ | |
131 | ? ((old & flag) ? (" -" string) : (" +" string)) \ | |
132 | : "") | |
133 | ||
1c4baffc | 134 | static int link_update_flags(Link *link, sd_netlink_message *m) { |
51d18171 TG |
135 | unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags; |
136 | uint8_t operstate; | |
137 | int r; | |
138 | ||
139 | assert(link); | |
140 | ||
141 | r = sd_rtnl_message_link_get_flags(m, &flags); | |
6a7a4e4d LP |
142 | if (r < 0) |
143 | return log_link_warning_errno(link, r, "Could not get link flags: %m"); | |
51d18171 | 144 | |
1c4baffc | 145 | r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate); |
51d18171 TG |
146 | if (r < 0) |
147 | /* if we got a message without operstate, take it to mean | |
148 | the state was unchanged */ | |
149 | operstate = link->kernel_operstate; | |
150 | ||
151 | if ((link->flags == flags) && (link->kernel_operstate == operstate)) | |
152 | return 0; | |
153 | ||
154 | if (link->flags != flags) { | |
6a7a4e4d | 155 | log_link_debug(link, "Flags change:%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s", |
51d18171 TG |
156 | FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags), |
157 | FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags), | |
158 | FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags), | |
159 | FLAG_STRING("UP", IFF_UP, link->flags, flags), | |
160 | FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags), | |
161 | FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags), | |
162 | FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags), | |
163 | FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags), | |
164 | FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags), | |
165 | FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags), | |
166 | FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags), | |
167 | FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags), | |
168 | FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags), | |
169 | FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags), | |
170 | FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags), | |
171 | FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags), | |
172 | FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags), | |
173 | FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags), | |
174 | FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags)); | |
175 | ||
176 | unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP | | |
177 | IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING | | |
178 | IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT | | |
179 | IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL | | |
180 | IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP | | |
181 | IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO); | |
182 | unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags); | |
183 | unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags); | |
184 | ||
185 | /* link flags are currently at most 18 bits, let's align to | |
186 | * printing 20 */ | |
187 | if (unknown_flags_added) | |
79008bdd | 188 | log_link_debug(link, |
6a7a4e4d | 189 | "Unknown link flags gained: %#.5x (ignoring)", |
51d18171 TG |
190 | unknown_flags_added); |
191 | ||
192 | if (unknown_flags_removed) | |
79008bdd | 193 | log_link_debug(link, |
6a7a4e4d | 194 | "Unknown link flags lost: %#.5x (ignoring)", |
51d18171 TG |
195 | unknown_flags_removed); |
196 | } | |
197 | ||
198 | link->flags = flags; | |
199 | link->kernel_operstate = operstate; | |
200 | ||
201 | link_save(link); | |
202 | ||
203 | return 0; | |
204 | } | |
205 | ||
1c4baffc | 206 | static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) { |
14b746f7 | 207 | _cleanup_link_unref_ Link *link = NULL; |
505f8da7 | 208 | uint16_t type; |
ca4e095a | 209 | const char *ifname; |
505f8da7 | 210 | int r, ifindex; |
f579559b | 211 | |
0c2f9b84 | 212 | assert(manager); |
505f8da7 | 213 | assert(message); |
f579559b TG |
214 | assert(ret); |
215 | ||
1c4baffc | 216 | r = sd_netlink_message_get_type(message, &type); |
505f8da7 TG |
217 | if (r < 0) |
218 | return r; | |
219 | else if (type != RTM_NEWLINK) | |
220 | return -EINVAL; | |
221 | ||
222 | r = sd_rtnl_message_link_get_ifindex(message, &ifindex); | |
223 | if (r < 0) | |
224 | return r; | |
225 | else if (ifindex <= 0) | |
226 | return -EINVAL; | |
227 | ||
1c4baffc | 228 | r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname); |
505f8da7 TG |
229 | if (r < 0) |
230 | return r; | |
231 | ||
f579559b TG |
232 | link = new0(Link, 1); |
233 | if (!link) | |
234 | return -ENOMEM; | |
235 | ||
14b746f7 | 236 | link->n_ref = 1; |
5a3eb5a7 | 237 | link->manager = manager; |
8434fd5c | 238 | link->state = LINK_STATE_PENDING; |
be3a09b7 | 239 | link->rtnl_extended_attrs = true; |
505f8da7 TG |
240 | link->ifindex = ifindex; |
241 | link->ifname = strdup(ifname); | |
242 | if (!link->ifname) | |
243 | return -ENOMEM; | |
f579559b | 244 | |
1c4baffc | 245 | r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac); |
512922f8 | 246 | if (r < 0) |
79008bdd | 247 | log_link_debug(link, "MAC address not found for new device, continuing without"); |
512922f8 | 248 | |
3c9b8860 TG |
249 | r = asprintf(&link->state_file, "/run/systemd/netif/links/%d", |
250 | link->ifindex); | |
fe8db0c5 | 251 | if (r < 0) |
315db1a8 | 252 | return -ENOMEM; |
fe8db0c5 | 253 | |
3c9b8860 TG |
254 | r = asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", |
255 | link->ifindex); | |
68a8723c TG |
256 | if (r < 0) |
257 | return -ENOMEM; | |
258 | ||
49699bac SS |
259 | r = asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", |
260 | link->ifindex); | |
261 | if (r < 0) | |
262 | return -ENOMEM; | |
263 | ||
264 | ||
d5099efc | 265 | r = hashmap_ensure_allocated(&manager->links, NULL); |
ae06ab10 TG |
266 | if (r < 0) |
267 | return r; | |
268 | ||
269 | r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link); | |
f579559b TG |
270 | if (r < 0) |
271 | return r; | |
272 | ||
51d18171 TG |
273 | r = link_update_flags(link, message); |
274 | if (r < 0) | |
275 | return r; | |
276 | ||
f579559b TG |
277 | *ret = link; |
278 | link = NULL; | |
279 | ||
280 | return 0; | |
281 | } | |
282 | ||
14b746f7 | 283 | static void link_free(Link *link) { |
428fd0a7 | 284 | Address *address; |
0d4ad91d AR |
285 | Iterator i; |
286 | Link *carrier; | |
428fd0a7 | 287 | |
f579559b TG |
288 | if (!link) |
289 | return; | |
290 | ||
428fd0a7 TG |
291 | while ((address = link->addresses)) { |
292 | LIST_REMOVE(addresses, link->addresses, address); | |
293 | address_free(address); | |
294 | } | |
295 | ||
11bf3cce LP |
296 | while ((address = link->pool_addresses)) { |
297 | LIST_REMOVE(addresses, link->pool_addresses, address); | |
298 | address_free(address); | |
299 | } | |
300 | ||
bfcdba8d | 301 | sd_dhcp_server_unref(link->dhcp_server); |
e5b04c8d | 302 | sd_dhcp_client_unref(link->dhcp_client); |
a6cc569e | 303 | sd_dhcp_lease_unref(link->dhcp_lease); |
f5be5601 | 304 | |
68a8723c TG |
305 | free(link->lease_file); |
306 | ||
07e10d1a TG |
307 | sd_lldp_free(link->lldp); |
308 | ||
49699bac SS |
309 | free(link->lldp_file); |
310 | ||
56cd007a | 311 | sd_ipv4ll_unref(link->ipv4ll); |
4138fb2c | 312 | sd_dhcp6_client_unref(link->dhcp6_client); |
6b66097b | 313 | sd_icmp6_nd_unref(link->icmp6_router_discovery); |
4138fb2c | 314 | |
28aeb07f | 315 | if (link->manager) |
ae06ab10 | 316 | hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex)); |
f579559b | 317 | |
c166a070 | 318 | free(link->ifname); |
68a8723c | 319 | |
fe8db0c5 | 320 | free(link->state_file); |
c166a070 | 321 | |
b5db00e5 UTL |
322 | udev_device_unref(link->udev_device); |
323 | ||
0d4ad91d AR |
324 | HASHMAP_FOREACH (carrier, link->bound_to_links, i) |
325 | hashmap_remove(link->bound_to_links, INT_TO_PTR(carrier->ifindex)); | |
326 | hashmap_free(link->bound_to_links); | |
327 | ||
328 | HASHMAP_FOREACH (carrier, link->bound_by_links, i) | |
329 | hashmap_remove(link->bound_by_links, INT_TO_PTR(carrier->ifindex)); | |
330 | hashmap_free(link->bound_by_links); | |
331 | ||
f579559b TG |
332 | free(link); |
333 | } | |
334 | ||
14b746f7 TG |
335 | Link *link_unref(Link *link) { |
336 | if (link && (-- link->n_ref <= 0)) | |
337 | link_free(link); | |
338 | ||
339 | return NULL; | |
340 | } | |
341 | ||
342 | Link *link_ref(Link *link) { | |
343 | if (link) | |
344 | assert_se(++ link->n_ref >= 2); | |
345 | ||
346 | return link; | |
347 | } | |
348 | ||
11a7f229 TG |
349 | int link_get(Manager *m, int ifindex, Link **ret) { |
350 | Link *link; | |
11a7f229 TG |
351 | |
352 | assert(m); | |
11a7f229 TG |
353 | assert(ifindex); |
354 | assert(ret); | |
355 | ||
ae06ab10 | 356 | link = hashmap_get(m->links, INT_TO_PTR(ifindex)); |
11a7f229 TG |
357 | if (!link) |
358 | return -ENODEV; | |
359 | ||
360 | *ret = link; | |
361 | ||
362 | return 0; | |
363 | } | |
364 | ||
e331e246 TG |
365 | static void link_set_state(Link *link, LinkState state) { |
366 | assert(link); | |
367 | ||
368 | if (link->state == state) | |
369 | return; | |
370 | ||
371 | link->state = state; | |
372 | ||
373 | link_send_changed(link, "AdministrativeState", NULL); | |
374 | ||
375 | return; | |
376 | } | |
377 | ||
57bd6899 TG |
378 | static void link_enter_unmanaged(Link *link) { |
379 | assert(link); | |
380 | ||
6a7a4e4d | 381 | log_link_debug(link, "Unmanaged"); |
57bd6899 | 382 | |
e331e246 | 383 | link_set_state(link, LINK_STATE_UNMANAGED); |
57bd6899 TG |
384 | |
385 | link_save(link); | |
386 | } | |
387 | ||
111bb8f9 TG |
388 | static int link_stop_clients(Link *link) { |
389 | int r = 0, k; | |
390 | ||
391 | assert(link); | |
392 | assert(link->manager); | |
393 | assert(link->manager->event); | |
394 | ||
395 | if (!link->network) | |
396 | return 0; | |
397 | ||
ba179154 | 398 | if (link->dhcp_client) { |
111bb8f9 | 399 | k = sd_dhcp_client_stop(link->dhcp_client); |
6a7a4e4d LP |
400 | if (k < 0) |
401 | r = log_link_warning_errno(link, r, "Could not stop DHCPv4 client: %m"); | |
111bb8f9 TG |
402 | } |
403 | ||
ba179154 | 404 | if (link->ipv4ll) { |
111bb8f9 | 405 | k = sd_ipv4ll_stop(link->ipv4ll); |
6a7a4e4d LP |
406 | if (k < 0) |
407 | r = log_link_warning_errno(link, r, "Could not stop IPv4 link-local: %m"); | |
dd43110f TG |
408 | } |
409 | ||
ba179154 | 410 | if(link->icmp6_router_discovery) { |
1873a3d3 PF |
411 | if (link->dhcp6_client) { |
412 | k = sd_dhcp6_client_stop(link->dhcp6_client); | |
6a7a4e4d LP |
413 | if (k < 0) |
414 | r = log_link_warning_errno(link, r, "Could not stop DHCPv6 client: %m"); | |
1873a3d3 | 415 | } |
4138fb2c | 416 | |
1873a3d3 | 417 | k = sd_icmp6_nd_stop(link->icmp6_router_discovery); |
6a7a4e4d LP |
418 | if (k < 0) |
419 | r = log_link_warning_errno(link, r, "Could not stop ICMPv6 router discovery: %m"); | |
4138fb2c PF |
420 | } |
421 | ||
ce43e484 | 422 | if (link->lldp) { |
ce43e484 | 423 | k = sd_lldp_stop(link->lldp); |
6a7a4e4d LP |
424 | if (k < 0) |
425 | r = log_link_warning_errno(link, r, "Could not stop LLDP: %m"); | |
ce43e484 SS |
426 | } |
427 | ||
111bb8f9 TG |
428 | return r; |
429 | } | |
430 | ||
b22d8a00 | 431 | void link_enter_failed(Link *link) { |
ef1ba606 | 432 | assert(link); |
f882c247 | 433 | |
370e9930 | 434 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) |
2139694e TG |
435 | return; |
436 | ||
6a7a4e4d | 437 | log_link_warning(link, "Failed"); |
449f7554 | 438 | |
e331e246 | 439 | link_set_state(link, LINK_STATE_FAILED); |
fe8db0c5 | 440 | |
111bb8f9 TG |
441 | link_stop_clients(link); |
442 | ||
fe8db0c5 | 443 | link_save(link); |
f882c247 TG |
444 | } |
445 | ||
4f434938 LP |
446 | static Address* link_find_dhcp_server_address(Link *link) { |
447 | Address *address; | |
448 | ||
449 | assert(link); | |
450 | assert(link->network); | |
451 | ||
d4cdbea5 | 452 | /* The first statically configured address if there is any */ |
4f434938 LP |
453 | LIST_FOREACH(addresses, address, link->network->static_addresses) { |
454 | ||
455 | if (address->family != AF_INET) | |
456 | continue; | |
457 | ||
af93291c | 458 | if (in_addr_is_null(address->family, &address->in_addr)) |
4f434938 LP |
459 | continue; |
460 | ||
461 | return address; | |
462 | } | |
463 | ||
464 | /* If that didn't work, find a suitable address we got from the pool */ | |
465 | LIST_FOREACH(addresses, address, link->pool_addresses) { | |
466 | if (address->family != AF_INET) | |
467 | continue; | |
468 | ||
469 | return address; | |
470 | } | |
471 | ||
472 | return NULL; | |
473 | } | |
474 | ||
dd43110f | 475 | static int link_enter_configured(Link *link) { |
dd43110f TG |
476 | assert(link); |
477 | assert(link->network); | |
478 | assert(link->state == LINK_STATE_SETTING_ROUTES); | |
479 | ||
6a7a4e4d | 480 | log_link_info(link, "Configured"); |
dd43110f | 481 | |
e331e246 | 482 | link_set_state(link, LINK_STATE_CONFIGURED); |
dd43110f TG |
483 | |
484 | link_save(link); | |
485 | ||
486 | return 0; | |
487 | } | |
488 | ||
3c9b8860 TG |
489 | void link_client_handler(Link *link) { |
490 | assert(link); | |
491 | assert(link->network); | |
492 | ||
493 | if (!link->static_configured) | |
494 | return; | |
495 | ||
78c958f8 | 496 | if (link_ipv4ll_enabled(link)) |
3c9b8860 TG |
497 | if (!link->ipv4ll_address || |
498 | !link->ipv4ll_route) | |
499 | return; | |
500 | ||
78c958f8 | 501 | if (link_dhcp4_enabled(link) && !link->dhcp4_configured) |
3c9b8860 TG |
502 | return; |
503 | ||
9fdaa992 TG |
504 | if (link->state != LINK_STATE_CONFIGURED) |
505 | link_enter_configured(link); | |
3c9b8860 TG |
506 | |
507 | return; | |
508 | } | |
509 | ||
1c4baffc | 510 | static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) { |
5da8149f | 511 | _cleanup_link_unref_ Link *link = userdata; |
f882c247 TG |
512 | int r; |
513 | ||
3c9b8860 | 514 | assert(link->link_messages > 0); |
370e9930 TG |
515 | assert(IN_SET(link->state, LINK_STATE_SETTING_ADDRESSES, |
516 | LINK_STATE_SETTING_ROUTES, LINK_STATE_FAILED, | |
517 | LINK_STATE_LINGER)); | |
f882c247 | 518 | |
3c9b8860 | 519 | link->link_messages --; |
f882c247 | 520 | |
77a008c0 | 521 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) |
f882c247 TG |
522 | return 1; |
523 | ||
1c4baffc | 524 | r = sd_netlink_message_get_errno(m); |
c166a070 | 525 | if (r < 0 && r != -EEXIST) |
6a7a4e4d | 526 | log_link_warning_errno(link, r, "%-*s: could not set route: %m", IFNAMSIZ, link->ifname); |
f882c247 | 527 | |
3c9b8860 | 528 | if (link->link_messages == 0) { |
6a7a4e4d | 529 | log_link_debug(link, "Routes set"); |
3c9b8860 TG |
530 | link->static_configured = true; |
531 | link_client_handler(link); | |
dd3efc09 | 532 | } |
f882c247 TG |
533 | |
534 | return 1; | |
535 | } | |
536 | ||
537 | static int link_enter_set_routes(Link *link) { | |
a6cc569e | 538 | Route *rt; |
f882c247 TG |
539 | int r; |
540 | ||
541 | assert(link); | |
542 | assert(link->network); | |
ef1ba606 | 543 | assert(link->state == LINK_STATE_SETTING_ADDRESSES); |
f882c247 | 544 | |
e331e246 | 545 | link_set_state(link, LINK_STATE_SETTING_ROUTES); |
f882c247 | 546 | |
3d3d4255 | 547 | LIST_FOREACH(routes, rt, link->network->static_routes) { |
a6cc569e | 548 | r = route_configure(rt, link, &route_handler); |
dd3efc09 | 549 | if (r < 0) { |
6a7a4e4d | 550 | log_link_warning_errno(link, r, "Could not set routes: %m"); |
3c9b8860 | 551 | link_enter_failed(link); |
a6cc569e TG |
552 | return r; |
553 | } | |
554 | ||
3c9b8860 | 555 | link->link_messages ++; |
8ddbeaa2 | 556 | } |
f5be5601 | 557 | |
3c9b8860 TG |
558 | if (link->link_messages == 0) { |
559 | link->static_configured = true; | |
560 | link_client_handler(link); | |
431ca2ce | 561 | } else |
6a7a4e4d | 562 | log_link_debug(link, "Setting routes"); |
f882c247 TG |
563 | |
564 | return 0; | |
565 | } | |
566 | ||
1c4baffc | 567 | int link_route_drop_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) { |
5da8149f | 568 | _cleanup_link_unref_ Link *link = userdata; |
5c1d3fc9 UTL |
569 | int r; |
570 | ||
571 | assert(m); | |
572 | assert(link); | |
573 | assert(link->ifname); | |
574 | ||
5da8149f | 575 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) |
5c1d3fc9 UTL |
576 | return 1; |
577 | ||
1c4baffc | 578 | r = sd_netlink_message_get_errno(m); |
b90b025a | 579 | if (r < 0 && r != -ESRCH) |
6a7a4e4d | 580 | log_link_warning_errno(link, r, "%-*s: could not drop route: %m", IFNAMSIZ, link->ifname); |
5c1d3fc9 | 581 | |
5bdd314c | 582 | return 1; |
5c1d3fc9 UTL |
583 | } |
584 | ||
1c4baffc | 585 | static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) { |
5da8149f | 586 | _cleanup_link_unref_ Link *link = userdata; |
f882c247 TG |
587 | int r; |
588 | ||
4958aee4 | 589 | assert(rtnl); |
f5be5601 TG |
590 | assert(m); |
591 | assert(link); | |
592 | assert(link->ifname); | |
3c9b8860 | 593 | assert(link->link_messages > 0); |
370e9930 TG |
594 | assert(IN_SET(link->state, LINK_STATE_SETTING_ADDRESSES, |
595 | LINK_STATE_FAILED, LINK_STATE_LINGER)); | |
f882c247 | 596 | |
3c9b8860 | 597 | link->link_messages --; |
f882c247 | 598 | |
5da8149f | 599 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) |
f882c247 TG |
600 | return 1; |
601 | ||
1c4baffc | 602 | r = sd_netlink_message_get_errno(m); |
c166a070 | 603 | if (r < 0 && r != -EEXIST) |
6a7a4e4d | 604 | log_link_warning_errno(link, r, "%-*s: could not set address: %m", IFNAMSIZ, link->ifname); |
45af44d4 TG |
605 | else if (r >= 0) |
606 | link_rtnl_process_address(rtnl, m, link->manager); | |
f882c247 | 607 | |
3c9b8860 | 608 | if (link->link_messages == 0) { |
6a7a4e4d | 609 | log_link_debug(link, "Addresses set"); |
ef1ba606 | 610 | link_enter_set_routes(link); |
dd3efc09 | 611 | } |
f882c247 TG |
612 | |
613 | return 1; | |
614 | } | |
615 | ||
616 | static int link_enter_set_addresses(Link *link) { | |
a6cc569e | 617 | Address *ad; |
f882c247 TG |
618 | int r; |
619 | ||
620 | assert(link); | |
621 | assert(link->network); | |
f5be5601 | 622 | assert(link->state != _LINK_STATE_INVALID); |
f882c247 | 623 | |
e331e246 | 624 | link_set_state(link, LINK_STATE_SETTING_ADDRESSES); |
f882c247 | 625 | |
3d3d4255 | 626 | LIST_FOREACH(addresses, ad, link->network->static_addresses) { |
a6cc569e | 627 | r = address_configure(ad, link, &address_handler); |
dd3efc09 | 628 | if (r < 0) { |
5a8bcb67 | 629 | log_link_warning_errno(link, r, "Could not set addresses: %m"); |
f5be5601 TG |
630 | link_enter_failed(link); |
631 | return r; | |
632 | } | |
633 | ||
3c9b8860 | 634 | link->link_messages ++; |
f882c247 TG |
635 | } |
636 | ||
d4cdbea5 TG |
637 | /* now that we can figure out a default address for the dhcp server, |
638 | start it */ | |
639 | if (link_dhcp4_server_enabled(link)) { | |
640 | struct in_addr pool_start; | |
641 | Address *address; | |
642 | ||
643 | address = link_find_dhcp_server_address(link); | |
644 | if (!address) { | |
6a7a4e4d | 645 | log_link_warning(link, "Failed to find suitable address for DHCPv4 server instance."); |
d4cdbea5 TG |
646 | link_enter_failed(link); |
647 | return 0; | |
648 | } | |
649 | ||
650 | r = sd_dhcp_server_set_address(link->dhcp_server, | |
651 | &address->in_addr.in, | |
652 | address->prefixlen); | |
653 | if (r < 0) | |
654 | return r; | |
655 | ||
656 | /* offer 32 addresses starting from the address following the server address */ | |
657 | pool_start.s_addr = htobe32(be32toh(address->in_addr.in.s_addr) + 1); | |
658 | r = sd_dhcp_server_set_lease_pool(link->dhcp_server, | |
659 | &pool_start, 32); | |
660 | if (r < 0) | |
661 | return r; | |
662 | ||
663 | /* TODO: | |
664 | r = sd_dhcp_server_set_router(link->dhcp_server, | |
665 | &main_address->in_addr.in); | |
666 | if (r < 0) | |
667 | return r; | |
668 | ||
669 | r = sd_dhcp_server_set_prefixlen(link->dhcp_server, | |
670 | main_address->prefixlen); | |
671 | if (r < 0) | |
672 | return r; | |
673 | */ | |
674 | ||
675 | r = sd_dhcp_server_start(link->dhcp_server); | |
676 | if (r < 0) { | |
6a7a4e4d | 677 | log_link_warning_errno(link, r, "Could not start DHCPv4 server instance: %m"); |
d4cdbea5 TG |
678 | |
679 | link_enter_failed(link); | |
680 | ||
681 | return 0; | |
682 | } | |
683 | ||
6a7a4e4d | 684 | log_link_debug(link, "Offering DHCPv4 leases"); |
d4cdbea5 TG |
685 | } |
686 | ||
6a7a4e4d | 687 | if (link->link_messages == 0) |
431ca2ce | 688 | link_enter_set_routes(link); |
6a7a4e4d LP |
689 | else |
690 | log_link_debug(link, "Setting addresses"); | |
431ca2ce | 691 | |
f882c247 TG |
692 | return 0; |
693 | } | |
694 | ||
1c4baffc | 695 | int link_address_drop_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) { |
5da8149f | 696 | _cleanup_link_unref_ Link *link = userdata; |
ff254138 TG |
697 | int r; |
698 | ||
699 | assert(m); | |
700 | assert(link); | |
701 | assert(link->ifname); | |
702 | ||
5da8149f | 703 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) |
ff254138 TG |
704 | return 1; |
705 | ||
1c4baffc | 706 | r = sd_netlink_message_get_errno(m); |
b90b025a | 707 | if (r < 0 && r != -EADDRNOTAVAIL) |
6a7a4e4d | 708 | log_link_warning_errno(link, r, "%-*s: could not drop address: %m", IFNAMSIZ, link->ifname); |
ff254138 | 709 | |
5bdd314c | 710 | return 1; |
ff254138 TG |
711 | } |
712 | ||
a245ced0 | 713 | static int link_set_bridge_fdb(Link *const link) { |
b98b483b AR |
714 | FdbEntry *fdb_entry; |
715 | int r = 0; | |
716 | ||
717 | LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) { | |
ea6ec096 | 718 | r = fdb_entry_configure(link, fdb_entry); |
b98b483b | 719 | if(r < 0) { |
6a7a4e4d | 720 | log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m"); |
b98b483b AR |
721 | break; |
722 | } | |
723 | } | |
724 | ||
725 | return r; | |
726 | } | |
727 | ||
1c4baffc | 728 | static int link_set_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) { |
e1853b00 SS |
729 | _cleanup_link_unref_ Link *link = userdata; |
730 | int r; | |
731 | ||
6a7a4e4d | 732 | log_link_debug(link, "Set link"); |
e1853b00 | 733 | |
1c4baffc | 734 | r = sd_netlink_message_get_errno(m); |
e1853b00 | 735 | if (r < 0 && r != -EEXIST) { |
f2341e0a | 736 | log_link_error_errno(link, r, "Could not join netdev: %m"); |
e1853b00 SS |
737 | link_enter_failed(link); |
738 | return 1; | |
739 | } | |
740 | ||
741 | return 0; | |
742 | } | |
743 | ||
19070062 | 744 | static int set_hostname_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) { |
5da8149f | 745 | _cleanup_link_unref_ Link *link = userdata; |
1346b1f0 TG |
746 | int r; |
747 | ||
19070062 | 748 | assert(m); |
b226d99b TG |
749 | assert(link); |
750 | ||
5da8149f | 751 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) |
370e9930 | 752 | return 1; |
370e9930 | 753 | |
1346b1f0 | 754 | r = sd_bus_message_get_errno(m); |
70b34f5d | 755 | if (r > 0) |
6a7a4e4d | 756 | log_link_warning_errno(link, r, "Could not set hostname: %m"); |
1346b1f0 TG |
757 | |
758 | return 1; | |
759 | } | |
760 | ||
3c9b8860 | 761 | int link_set_hostname(Link *link, const char *hostname) { |
1346b1f0 TG |
762 | int r = 0; |
763 | ||
b226d99b TG |
764 | assert(link); |
765 | assert(link->manager); | |
1346b1f0 TG |
766 | assert(hostname); |
767 | ||
79008bdd | 768 | log_link_debug(link, "Setting transient hostname: '%s'", hostname); |
1346b1f0 | 769 | |
3c9b8860 TG |
770 | if (!link->manager->bus) { |
771 | /* TODO: replace by assert when we can rely on kdbus */ | |
6a7a4e4d | 772 | log_link_info(link, "Not connected to system bus, ignoring transient hostname."); |
bcbca829 TG |
773 | return 0; |
774 | } | |
775 | ||
9c34154a | 776 | r = sd_bus_call_method_async( |
b226d99b | 777 | link->manager->bus, |
9c34154a | 778 | NULL, |
1346b1f0 TG |
779 | "org.freedesktop.hostname1", |
780 | "/org/freedesktop/hostname1", | |
781 | "org.freedesktop.hostname1", | |
9c34154a UTL |
782 | "SetHostname", |
783 | set_hostname_handler, | |
784 | link, | |
785 | "sb", | |
786 | hostname, | |
787 | false); | |
1346b1f0 | 788 | |
6a7a4e4d LP |
789 | if (r < 0) |
790 | return log_link_error_errno(link, r, "Could not set transient hostname: %m"); | |
b226d99b TG |
791 | |
792 | link_ref(link); | |
1346b1f0 | 793 | |
5da8149f | 794 | return 0; |
1346b1f0 TG |
795 | } |
796 | ||
1c4baffc | 797 | static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) { |
5da8149f | 798 | _cleanup_link_unref_ Link *link = userdata; |
4f882b2a TG |
799 | int r; |
800 | ||
801 | assert(m); | |
802 | assert(link); | |
803 | assert(link->ifname); | |
804 | ||
5da8149f | 805 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) |
4f882b2a TG |
806 | return 1; |
807 | ||
1c4baffc | 808 | r = sd_netlink_message_get_errno(m); |
c9ccc19f | 809 | if (r < 0) |
6a7a4e4d | 810 | log_link_warning_errno(link, r, "%-*s: could not set MTU: %m", IFNAMSIZ, link->ifname); |
4f882b2a TG |
811 | |
812 | return 1; | |
813 | } | |
814 | ||
3c9b8860 | 815 | int link_set_mtu(Link *link, uint32_t mtu) { |
1c4baffc | 816 | _cleanup_netlink_message_unref_ sd_netlink_message *req = NULL; |
4f882b2a TG |
817 | int r; |
818 | ||
819 | assert(link); | |
820 | assert(link->manager); | |
821 | assert(link->manager->rtnl); | |
822 | ||
6a7a4e4d | 823 | log_link_debug(link, "Setting MTU: %" PRIu32, mtu); |
4f882b2a | 824 | |
6a7a4e4d LP |
825 | r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex); |
826 | if (r < 0) | |
827 | return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m"); | |
4f882b2a | 828 | |
1c4baffc | 829 | r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu); |
6a7a4e4d LP |
830 | if (r < 0) |
831 | return log_link_error_errno(link, r, "Could not append MTU: %m"); | |
4f882b2a | 832 | |
1c4baffc | 833 | r = sd_netlink_call_async(link->manager->rtnl, req, set_mtu_handler, link, 0, NULL); |
6a7a4e4d LP |
834 | if (r < 0) |
835 | return log_link_error_errno(link, r, "Could not send rtnetlink message: %m"); | |
4f882b2a | 836 | |
ae941762 | 837 | link_ref(link); |
b226d99b | 838 | |
4f882b2a TG |
839 | return 0; |
840 | } | |
841 | ||
e1853b00 | 842 | static int link_set_bridge(Link *link) { |
1c4baffc | 843 | _cleanup_netlink_message_unref_ sd_netlink_message *req = NULL; |
e1853b00 SS |
844 | int r; |
845 | ||
846 | assert(link); | |
847 | assert(link->network); | |
848 | ||
849 | if(link->network->cost == 0) | |
850 | return 0; | |
851 | ||
6a7a4e4d LP |
852 | r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex); |
853 | if (r < 0) | |
854 | return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m"); | |
e1853b00 SS |
855 | |
856 | r = sd_rtnl_message_link_set_family(req, PF_BRIDGE); | |
6a7a4e4d LP |
857 | if (r < 0) |
858 | return log_link_error_errno(link, r, "Could not set message family: %m"); | |
e1853b00 | 859 | |
1c4baffc | 860 | r = sd_netlink_message_open_container(req, IFLA_PROTINFO); |
6a7a4e4d LP |
861 | if (r < 0) |
862 | return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m"); | |
e1853b00 SS |
863 | |
864 | if(link->network->cost != 0) { | |
1c4baffc | 865 | r = sd_netlink_message_append_u32(req, IFLA_BRPORT_COST, link->network->cost); |
6a7a4e4d LP |
866 | if (r < 0) |
867 | return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_COST attribute: %m"); | |
e1853b00 SS |
868 | } |
869 | ||
1c4baffc | 870 | r = sd_netlink_message_close_container(req); |
6a7a4e4d LP |
871 | if (r < 0) |
872 | return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m"); | |
e1853b00 | 873 | |
1c4baffc | 874 | r = sd_netlink_call_async(link->manager->rtnl, req, link_set_handler, link, 0, NULL); |
6a7a4e4d LP |
875 | if (r < 0) |
876 | return log_link_error_errno(link, r, "Could not send rtnetlink message: %m"); | |
e1853b00 SS |
877 | |
878 | link_ref(link); | |
879 | ||
880 | return r; | |
881 | } | |
882 | ||
49699bac SS |
883 | static void lldp_handler(sd_lldp *lldp, int event, void *userdata) { |
884 | Link *link = userdata; | |
885 | int r; | |
886 | ||
887 | assert(link); | |
888 | assert(link->network); | |
889 | assert(link->manager); | |
890 | ||
891 | if (event != UPDATE_INFO) | |
892 | return; | |
893 | ||
894 | r = sd_lldp_save(link->lldp, link->lldp_file); | |
895 | if (r < 0) | |
6a7a4e4d | 896 | log_link_warning_errno(link, r, "Could not save LLDP: %m"); |
49699bac SS |
897 | |
898 | } | |
899 | ||
ff254138 TG |
900 | static int link_acquire_conf(Link *link) { |
901 | int r; | |
902 | ||
903 | assert(link); | |
904 | assert(link->network); | |
ff254138 TG |
905 | assert(link->manager); |
906 | assert(link->manager->event); | |
907 | ||
78c958f8 | 908 | if (link_ipv4ll_enabled(link)) { |
eb34d4af | 909 | assert(link->ipv4ll); |
ff254138 | 910 | |
6a7a4e4d | 911 | log_link_debug(link, "Acquiring IPv4 link-local address"); |
5c1d3fc9 UTL |
912 | |
913 | r = sd_ipv4ll_start(link->ipv4ll); | |
6a7a4e4d LP |
914 | if (r < 0) |
915 | return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m"); | |
5c1d3fc9 UTL |
916 | } |
917 | ||
78c958f8 | 918 | if (link_dhcp4_enabled(link)) { |
eb34d4af | 919 | assert(link->dhcp_client); |
ff254138 | 920 | |
6a7a4e4d | 921 | log_link_debug(link, "Acquiring DHCPv4 lease"); |
ab47d620 | 922 | |
5c1d3fc9 | 923 | r = sd_dhcp_client_start(link->dhcp_client); |
6a7a4e4d LP |
924 | if (r < 0) |
925 | return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m"); | |
5c1d3fc9 | 926 | } |
ff254138 | 927 | |
78c958f8 | 928 | if (link_dhcp6_enabled(link)) { |
4138fb2c PF |
929 | assert(link->icmp6_router_discovery); |
930 | ||
6a7a4e4d | 931 | log_link_debug(link, "Discovering IPv6 routers"); |
4138fb2c PF |
932 | |
933 | r = sd_icmp6_router_solicitation_start(link->icmp6_router_discovery); | |
6a7a4e4d LP |
934 | if (r < 0) |
935 | return log_link_warning_errno(link, r, "Could not start IPv6 router discovery: %m"); | |
4138fb2c PF |
936 | } |
937 | ||
ce43e484 SS |
938 | if (link_lldp_enabled(link)) { |
939 | assert(link->lldp); | |
940 | ||
941 | log_link_debug(link, "Starting LLDP"); | |
942 | ||
943 | r = sd_lldp_start(link->lldp); | |
6a7a4e4d LP |
944 | if (r < 0) |
945 | return log_link_warning_errno(link, r, "Could not start LLDP: %m"); | |
ce43e484 SS |
946 | } |
947 | ||
ff254138 TG |
948 | return 0; |
949 | } | |
950 | ||
a61bb41c | 951 | bool link_has_carrier(Link *link) { |
deb2e523 TG |
952 | /* see Documentation/networking/operstates.txt in the kernel sources */ |
953 | ||
a61bb41c | 954 | if (link->kernel_operstate == IF_OPER_UP) |
deb2e523 TG |
955 | return true; |
956 | ||
a61bb41c | 957 | if (link->kernel_operstate == IF_OPER_UNKNOWN) |
deb2e523 | 958 | /* operstate may not be implemented, so fall back to flags */ |
a61bb41c | 959 | if ((link->flags & IFF_LOWER_UP) && !(link->flags & IFF_DORMANT)) |
deb2e523 TG |
960 | return true; |
961 | ||
962 | return false; | |
963 | } | |
964 | ||
1c4baffc | 965 | static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) { |
5da8149f | 966 | _cleanup_link_unref_ Link *link = userdata; |
dd3efc09 TG |
967 | int r; |
968 | ||
1746cf2a TG |
969 | assert(link); |
970 | ||
5da8149f | 971 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) |
1746cf2a TG |
972 | return 1; |
973 | ||
1c4baffc | 974 | r = sd_netlink_message_get_errno(m); |
6a7a4e4d LP |
975 | if (r < 0) |
976 | /* we warn but don't fail the link, as it may be | |
977 | brought up later */ | |
978 | log_link_warning_errno(link, r, "%-*s: could not bring up interface: %m", IFNAMSIZ, link->ifname); | |
45ad2c13 | 979 | |
f882c247 TG |
980 | return 1; |
981 | } | |
982 | ||
983 | static int link_up(Link *link) { | |
1c4baffc | 984 | _cleanup_netlink_message_unref_ sd_netlink_message *req = NULL; |
5c3072ea | 985 | uint8_t ipv6ll_mode; |
f579559b TG |
986 | int r; |
987 | ||
f882c247 | 988 | assert(link); |
c106cc36 | 989 | assert(link->network); |
f882c247 TG |
990 | assert(link->manager); |
991 | assert(link->manager->rtnl); | |
992 | ||
6a7a4e4d | 993 | log_link_debug(link, "Bringing link up"); |
449f7554 | 994 | |
6a7a4e4d LP |
995 | r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex); |
996 | if (r < 0) | |
997 | return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m"); | |
f579559b | 998 | |
5d4795f3 | 999 | r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP); |
6a7a4e4d LP |
1000 | if (r < 0) |
1001 | return log_link_error_errno(link, r, "Could not set link flags: %m"); | |
fc25d7f8 | 1002 | |
c106cc36 | 1003 | if (link->network->mac) { |
1c4baffc | 1004 | r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac); |
6a7a4e4d LP |
1005 | if (r < 0) |
1006 | return log_link_error_errno(link, r, "Could not set MAC address: %m"); | |
c106cc36 TG |
1007 | } |
1008 | ||
1009 | if (link->network->mtu) { | |
1c4baffc | 1010 | r = sd_netlink_message_append_u32(req, IFLA_MTU, link->network->mtu); |
6a7a4e4d LP |
1011 | if (r < 0) |
1012 | return log_link_error_errno(link, r, "Could not set MTU: %m"); | |
c106cc36 TG |
1013 | } |
1014 | ||
1c4baffc | 1015 | r = sd_netlink_message_open_container(req, IFLA_AF_SPEC); |
6a7a4e4d LP |
1016 | if (r < 0) |
1017 | return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m"); | |
d0d6a4cd | 1018 | |
01d28f81 TG |
1019 | if (socket_ipv6_is_supported()) { |
1020 | /* if the kernel lacks ipv6 support setting IFF_UP fails if any ipv6 options are passed */ | |
1c4baffc | 1021 | r = sd_netlink_message_open_container(req, AF_INET6); |
01d28f81 TG |
1022 | if (r < 0) |
1023 | return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m"); | |
d0d6a4cd | 1024 | |
01d28f81 | 1025 | ipv6ll_mode = link_ipv6ll_enabled(link) ? IN6_ADDR_GEN_MODE_EUI64 : IN6_ADDR_GEN_MODE_NONE; |
1c4baffc | 1026 | r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode); |
01d28f81 TG |
1027 | if (r < 0) |
1028 | return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m"); | |
d0d6a4cd | 1029 | |
01d28f81 | 1030 | if (!in_addr_is_null(AF_INET6, &link->network->ipv6_token)) { |
1c4baffc | 1031 | r = sd_netlink_message_append_in6_addr(req, IFLA_INET6_TOKEN, &link->network->ipv6_token.in6); |
01d28f81 TG |
1032 | if (r < 0) |
1033 | return log_link_error_errno(link, r, "Could not append IFLA_INET6_TOKEN: %m"); | |
1034 | } | |
1035 | ||
1c4baffc | 1036 | r = sd_netlink_message_close_container(req); |
6a7a4e4d | 1037 | if (r < 0) |
01d28f81 | 1038 | return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m"); |
7f77697a | 1039 | } |
d0d6a4cd | 1040 | |
1c4baffc | 1041 | r = sd_netlink_message_close_container(req); |
6a7a4e4d LP |
1042 | if (r < 0) |
1043 | return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m"); | |
d0d6a4cd | 1044 | |
1c4baffc | 1045 | r = sd_netlink_call_async(link->manager->rtnl, req, link_up_handler, link, 0, NULL); |
6a7a4e4d LP |
1046 | if (r < 0) |
1047 | return log_link_error_errno(link, r, "Could not send rtnetlink message: %m"); | |
f579559b | 1048 | |
b226d99b TG |
1049 | link_ref(link); |
1050 | ||
f882c247 TG |
1051 | return 0; |
1052 | } | |
1053 | ||
1c4baffc | 1054 | static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) { |
0d4ad91d AR |
1055 | _cleanup_link_unref_ Link *link = userdata; |
1056 | int r; | |
1057 | ||
1058 | assert(link); | |
1059 | ||
1060 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) | |
1061 | return 1; | |
1062 | ||
1c4baffc | 1063 | r = sd_netlink_message_get_errno(m); |
0d4ad91d | 1064 | if (r < 0) |
6a7a4e4d | 1065 | log_link_warning_errno(link, r, "%-*s: could not bring down interface: %m", IFNAMSIZ, link->ifname); |
0d4ad91d AR |
1066 | |
1067 | return 1; | |
1068 | } | |
1069 | ||
1070 | static int link_down(Link *link) { | |
1c4baffc | 1071 | _cleanup_netlink_message_unref_ sd_netlink_message *req = NULL; |
0d4ad91d AR |
1072 | int r; |
1073 | ||
1074 | assert(link); | |
1075 | assert(link->manager); | |
1076 | assert(link->manager->rtnl); | |
1077 | ||
6a7a4e4d | 1078 | log_link_debug(link, "Bringing link down"); |
0d4ad91d AR |
1079 | |
1080 | r = sd_rtnl_message_new_link(link->manager->rtnl, &req, | |
1081 | RTM_SETLINK, link->ifindex); | |
6a7a4e4d LP |
1082 | if (r < 0) |
1083 | return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m"); | |
0d4ad91d AR |
1084 | |
1085 | r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP); | |
6a7a4e4d LP |
1086 | if (r < 0) |
1087 | return log_link_error_errno(link, r, "Could not set link flags: %m"); | |
0d4ad91d | 1088 | |
1c4baffc | 1089 | r = sd_netlink_call_async(link->manager->rtnl, req, link_down_handler, link, 0, NULL); |
6a7a4e4d LP |
1090 | if (r < 0) |
1091 | return log_link_error_errno(link, r, "Could not send rtnetlink message: %m"); | |
0d4ad91d AR |
1092 | |
1093 | link_ref(link); | |
1094 | ||
1095 | return 0; | |
1096 | } | |
1097 | ||
1098 | static int link_handle_bound_to_list(Link *link) { | |
1099 | Link *l; | |
1100 | Iterator i; | |
1101 | int r; | |
1102 | bool required_up = false; | |
1103 | bool link_is_up = false; | |
1104 | ||
1105 | assert(link); | |
1106 | ||
1107 | if (hashmap_isempty(link->bound_to_links)) | |
1108 | return 0; | |
1109 | ||
1110 | if (link->flags & IFF_UP) | |
1111 | link_is_up = true; | |
1112 | ||
1113 | HASHMAP_FOREACH (l, link->bound_to_links, i) | |
1114 | if (link_has_carrier(l)) { | |
1115 | required_up = true; | |
1116 | break; | |
1117 | } | |
1118 | ||
1119 | if (!required_up && link_is_up) { | |
1120 | r = link_down(link); | |
1121 | if (r < 0) | |
1122 | return r; | |
1123 | } else if (required_up && !link_is_up) { | |
1124 | r = link_up(link); | |
1125 | if (r < 0) | |
1126 | return r; | |
1127 | } | |
1128 | ||
1129 | return 0; | |
1130 | } | |
1131 | ||
1132 | static int link_handle_bound_by_list(Link *link) { | |
1133 | Iterator i; | |
1134 | Link *l; | |
1135 | int r; | |
1136 | ||
1137 | assert(link); | |
1138 | ||
1139 | if (hashmap_isempty(link->bound_by_links)) | |
1140 | return 0; | |
1141 | ||
1142 | HASHMAP_FOREACH (l, link->bound_by_links, i) { | |
1143 | r = link_handle_bound_to_list(l); | |
1144 | if (r < 0) | |
1145 | return r; | |
1146 | } | |
1147 | ||
1148 | return 0; | |
1149 | } | |
1150 | ||
1151 | static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) { | |
1152 | int r; | |
1153 | ||
1154 | assert(link); | |
1155 | assert(carrier); | |
1156 | ||
1157 | if (link == carrier) | |
1158 | return 0; | |
1159 | ||
1160 | if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex))) | |
1161 | return 0; | |
1162 | ||
1163 | r = hashmap_ensure_allocated(h, NULL); | |
1164 | if (r < 0) | |
1165 | return r; | |
1166 | ||
1167 | r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier); | |
1168 | if (r < 0) | |
1169 | return r; | |
1170 | ||
1171 | return 0; | |
1172 | } | |
1173 | ||
1174 | static int link_new_bound_by_list(Link *link) { | |
1175 | Manager *m; | |
1176 | Link *carrier; | |
1177 | Iterator i; | |
1178 | int r; | |
1179 | bool list_updated = false; | |
1180 | ||
1181 | assert(link); | |
1182 | assert(link->manager); | |
1183 | ||
1184 | m = link->manager; | |
1185 | ||
1186 | HASHMAP_FOREACH (carrier, m->links, i) { | |
1187 | if (!carrier->network) | |
1188 | continue; | |
1189 | ||
1190 | if (strv_isempty(carrier->network->bind_carrier)) | |
1191 | continue; | |
1192 | ||
1193 | if (strv_fnmatch(carrier->network->bind_carrier, link->ifname, 0)) { | |
1194 | r = link_put_carrier(link, carrier, &link->bound_by_links); | |
1195 | if (r < 0) | |
1196 | return r; | |
1197 | ||
1198 | list_updated = true; | |
1199 | } | |
1200 | } | |
1201 | ||
1202 | if (list_updated) | |
1203 | link_save(link); | |
1204 | ||
1205 | HASHMAP_FOREACH (carrier, link->bound_by_links, i) { | |
1206 | r = link_put_carrier(carrier, link, &carrier->bound_to_links); | |
1207 | if (r < 0) | |
1208 | return r; | |
1209 | ||
1210 | link_save(carrier); | |
1211 | } | |
1212 | ||
1213 | return 0; | |
1214 | } | |
1215 | ||
1216 | static int link_new_bound_to_list(Link *link) { | |
1217 | Manager *m; | |
1218 | Link *carrier; | |
1219 | Iterator i; | |
1220 | int r; | |
1221 | bool list_updated = false; | |
1222 | ||
1223 | assert(link); | |
1224 | assert(link->manager); | |
1225 | ||
1226 | if (!link->network) | |
1227 | return 0; | |
1228 | ||
1229 | if (strv_isempty(link->network->bind_carrier)) | |
1230 | return 0; | |
1231 | ||
1232 | m = link->manager; | |
1233 | ||
1234 | HASHMAP_FOREACH (carrier, m->links, i) { | |
1235 | if (strv_fnmatch(link->network->bind_carrier, carrier->ifname, 0)) { | |
1236 | r = link_put_carrier(link, carrier, &link->bound_to_links); | |
1237 | if (r < 0) | |
1238 | return r; | |
1239 | ||
1240 | list_updated = true; | |
1241 | } | |
1242 | } | |
1243 | ||
1244 | if (list_updated) | |
1245 | link_save(link); | |
1246 | ||
1247 | HASHMAP_FOREACH (carrier, link->bound_to_links, i) { | |
1248 | r = link_put_carrier(carrier, link, &carrier->bound_by_links); | |
1249 | if (r < 0) | |
1250 | return r; | |
1251 | ||
1252 | link_save(carrier); | |
1253 | } | |
1254 | ||
1255 | return 0; | |
1256 | } | |
1257 | ||
1258 | static int link_new_carrier_maps(Link *link) { | |
1259 | int r; | |
1260 | ||
1261 | r = link_new_bound_by_list(link); | |
1262 | if (r < 0) | |
1263 | return r; | |
1264 | ||
1265 | r = link_handle_bound_by_list(link); | |
1266 | if (r < 0) | |
1267 | return r; | |
1268 | ||
1269 | r = link_new_bound_to_list(link); | |
1270 | if (r < 0) | |
1271 | return r; | |
1272 | ||
1273 | r = link_handle_bound_to_list(link); | |
1274 | if (r < 0) | |
1275 | return r; | |
1276 | ||
1277 | return 0; | |
1278 | } | |
1279 | ||
1280 | static void link_free_bound_to_list(Link *link) { | |
1281 | Link *bound_to; | |
1282 | Iterator i; | |
1283 | ||
1284 | HASHMAP_FOREACH (bound_to, link->bound_to_links, i) { | |
1285 | hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex)); | |
1286 | ||
1287 | if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex))) | |
1288 | link_save(bound_to); | |
1289 | } | |
1290 | ||
1291 | return; | |
1292 | } | |
1293 | ||
1294 | static void link_free_bound_by_list(Link *link) { | |
1295 | Link *bound_by; | |
1296 | Iterator i; | |
1297 | ||
1298 | HASHMAP_FOREACH (bound_by, link->bound_by_links, i) { | |
1299 | hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex)); | |
1300 | ||
1301 | if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) { | |
1302 | link_save(bound_by); | |
1303 | link_handle_bound_to_list(bound_by); | |
1304 | } | |
1305 | } | |
1306 | ||
1307 | return; | |
1308 | } | |
1309 | ||
1310 | static void link_free_carrier_maps(Link *link) { | |
1311 | bool list_updated = false; | |
1312 | ||
1313 | assert(link); | |
1314 | ||
1315 | if (!hashmap_isempty(link->bound_to_links)) { | |
1316 | link_free_bound_to_list(link); | |
1317 | list_updated = true; | |
1318 | } | |
1319 | ||
1320 | if (!hashmap_isempty(link->bound_by_links)) { | |
1321 | link_free_bound_by_list(link); | |
1322 | list_updated = true; | |
1323 | } | |
1324 | ||
1325 | if (list_updated) | |
1326 | link_save(link); | |
1327 | ||
1328 | return; | |
1329 | } | |
1330 | ||
1331 | void link_drop(Link *link) { | |
1332 | if (!link || link->state == LINK_STATE_LINGER) | |
1333 | return; | |
1334 | ||
1335 | link_set_state(link, LINK_STATE_LINGER); | |
1336 | ||
1337 | link_free_carrier_maps(link); | |
1338 | ||
6a7a4e4d | 1339 | log_link_debug(link, "Link removed"); |
0d4ad91d AR |
1340 | |
1341 | link_unref(link); | |
1342 | ||
1343 | return; | |
1344 | } | |
1345 | ||
3f265037 | 1346 | static int link_joined(Link *link) { |
f882c247 TG |
1347 | int r; |
1348 | ||
ef1ba606 | 1349 | assert(link); |
f5be5601 | 1350 | assert(link->network); |
dd3efc09 | 1351 | |
0d4ad91d AR |
1352 | if (!hashmap_isempty(link->bound_to_links)) { |
1353 | r = link_handle_bound_to_list(link); | |
1354 | if (r < 0) | |
1355 | return r; | |
1356 | } else if (!(link->flags & IFF_UP)) { | |
505f8da7 TG |
1357 | r = link_up(link); |
1358 | if (r < 0) { | |
1359 | link_enter_failed(link); | |
1360 | return r; | |
1361 | } | |
ef1ba606 | 1362 | } |
f882c247 | 1363 | |
e1853b00 SS |
1364 | if(link->network->bridge) { |
1365 | r = link_set_bridge(link); | |
6a7a4e4d LP |
1366 | if (r < 0) |
1367 | log_link_error_errno(link, r, "Could not set bridge message: %m"); | |
e1853b00 SS |
1368 | } |
1369 | ||
fb6730c4 | 1370 | return link_enter_set_addresses(link); |
02b59d57 TG |
1371 | } |
1372 | ||
62e2d5bb | 1373 | static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) { |
5da8149f | 1374 | _cleanup_link_unref_ Link *link = userdata; |
02b59d57 TG |
1375 | int r; |
1376 | ||
1746cf2a | 1377 | assert(link); |
ef1ba606 | 1378 | assert(link->network); |
02b59d57 | 1379 | |
52433f6b TG |
1380 | link->enslaving --; |
1381 | ||
5da8149f | 1382 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) |
02b59d57 TG |
1383 | return 1; |
1384 | ||
1c4baffc | 1385 | r = sd_netlink_message_get_errno(m); |
856f962c | 1386 | if (r < 0 && r != -EEXIST) { |
6a7a4e4d | 1387 | log_link_error_errno(link, r, "%-*s: could not join netdev: %m", IFNAMSIZ, link->ifname); |
ef1ba606 TG |
1388 | link_enter_failed(link); |
1389 | return 1; | |
ba179154 | 1390 | } else |
6a7a4e4d | 1391 | log_link_debug(link, "Joined netdev"); |
02b59d57 | 1392 | |
856f962c | 1393 | if (link->enslaving <= 0) |
3f265037 | 1394 | link_joined(link); |
02b59d57 TG |
1395 | |
1396 | return 1; | |
1397 | } | |
1398 | ||
3f265037 | 1399 | static int link_enter_join_netdev(Link *link) { |
6a0a2f86 | 1400 | NetDev *netdev; |
672682a6 | 1401 | Iterator i; |
02b59d57 TG |
1402 | int r; |
1403 | ||
1404 | assert(link); | |
1405 | assert(link->network); | |
8434fd5c | 1406 | assert(link->state == LINK_STATE_PENDING); |
02b59d57 | 1407 | |
e331e246 | 1408 | link_set_state(link, LINK_STATE_ENSLAVING); |
02b59d57 | 1409 | |
fe8db0c5 TG |
1410 | link_save(link); |
1411 | ||
7951dea2 SS |
1412 | if (!link->network->bridge && |
1413 | !link->network->bond && | |
6a0a2f86 | 1414 | hashmap_isempty(link->network->stacked_netdevs)) |
3f265037 | 1415 | return link_joined(link); |
02b59d57 | 1416 | |
d9c67ea1 | 1417 | if (link->network->bond) { |
f2341e0a LP |
1418 | log_struct(LOG_DEBUG, |
1419 | LOG_LINK_INTERFACE(link), | |
1420 | LOG_NETDEV_INTERFACE(link->network->bond), | |
1421 | LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname), | |
1422 | NULL); | |
1423 | ||
1424 | r = netdev_join(link->network->bond, link, netdev_join_handler); | |
52433f6b | 1425 | if (r < 0) { |
f2341e0a LP |
1426 | log_struct_errno(LOG_WARNING, r, |
1427 | LOG_LINK_INTERFACE(link), | |
1428 | LOG_NETDEV_INTERFACE(link->network->bond), | |
1429 | LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname), | |
1430 | NULL); | |
1431 | ||
52433f6b TG |
1432 | link_enter_failed(link); |
1433 | return r; | |
1434 | } | |
1435 | ||
0ad6148e MO |
1436 | link->enslaving ++; |
1437 | } | |
1438 | ||
d9c67ea1 | 1439 | if (link->network->bridge) { |
f2341e0a LP |
1440 | log_struct(LOG_DEBUG, |
1441 | LOG_LINK_INTERFACE(link), | |
1442 | LOG_NETDEV_INTERFACE(link->network->bridge), | |
1443 | LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname), | |
1444 | NULL); | |
1445 | ||
1446 | r = netdev_join(link->network->bridge, link, netdev_join_handler); | |
0ad6148e | 1447 | if (r < 0) { |
f2341e0a LP |
1448 | log_struct_errno(LOG_WARNING, r, |
1449 | LOG_LINK_INTERFACE(link), | |
1450 | LOG_NETDEV_INTERFACE(link->network->bridge), | |
1451 | LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname), | |
1452 | NULL), | |
0ad6148e MO |
1453 | link_enter_failed(link); |
1454 | return r; | |
1455 | } | |
1456 | ||
52433f6b TG |
1457 | link->enslaving ++; |
1458 | } | |
1459 | ||
6a0a2f86 | 1460 | HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) { |
7951dea2 | 1461 | |
f2341e0a LP |
1462 | log_struct(LOG_DEBUG, |
1463 | LOG_LINK_INTERFACE(link), | |
1464 | LOG_NETDEV_INTERFACE(netdev), | |
1465 | LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname), | |
1466 | NULL); | |
1467 | ||
1468 | r = netdev_join(netdev, link, netdev_join_handler); | |
7951dea2 | 1469 | if (r < 0) { |
f2341e0a LP |
1470 | log_struct_errno(LOG_WARNING, r, |
1471 | LOG_LINK_INTERFACE(link), | |
1472 | LOG_NETDEV_INTERFACE(netdev), | |
1473 | LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname), | |
1474 | NULL); | |
326cb406 SS |
1475 | link_enter_failed(link); |
1476 | return r; | |
1477 | } | |
1478 | ||
326cb406 SS |
1479 | link->enslaving ++; |
1480 | } | |
1481 | ||
ef1ba606 TG |
1482 | return 0; |
1483 | } | |
1484 | ||
769d324c | 1485 | static int link_set_ipv4_forward(Link *link) { |
15dee3f0 | 1486 | const char *p = NULL, *v; |
5a8bcb67 LP |
1487 | int r; |
1488 | ||
15dee3f0 LP |
1489 | if (link->flags & IFF_LOOPBACK) |
1490 | return 0; | |
1491 | ||
8add5f79 NO |
1492 | if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID) |
1493 | return 0; | |
1494 | ||
63c372cb | 1495 | p = strjoina("/proc/sys/net/ipv4/conf/", link->ifname, "/forwarding"); |
15dee3f0 LP |
1496 | v = one_zero(link_ipv4_forward_enabled(link)); |
1497 | ||
1498 | r = write_string_file_no_create(p, v); | |
1499 | if (r < 0) { | |
1500 | /* If the right value is set anyway, don't complain */ | |
1501 | if (verify_one_line_file(p, v) > 0) | |
1502 | return 0; | |
1503 | ||
43c6d5ab | 1504 | log_link_warning_errno(link, r, "Cannot configure IPv4 forwarding for interface %s: %m", link->ifname); |
15dee3f0 | 1505 | } |
43c6d5ab | 1506 | |
769d324c LP |
1507 | return 0; |
1508 | } | |
1509 | ||
1510 | static int link_set_ipv6_forward(Link *link) { | |
15dee3f0 | 1511 | const char *p = NULL, *v = NULL; |
769d324c LP |
1512 | int r; |
1513 | ||
fe027299 LP |
1514 | /* Make this a NOP if IPv6 is not available */ |
1515 | if (!socket_ipv6_is_supported()) | |
1516 | return 0; | |
1517 | ||
15dee3f0 LP |
1518 | if (link->flags & IFF_LOOPBACK) |
1519 | return 0; | |
1520 | ||
8add5f79 NO |
1521 | if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID) |
1522 | return 0; | |
1523 | ||
63c372cb | 1524 | p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/forwarding"); |
15dee3f0 LP |
1525 | v = one_zero(link_ipv6_forward_enabled(link)); |
1526 | ||
1527 | r = write_string_file_no_create(p, v); | |
1528 | if (r < 0) { | |
1529 | /* If the right value is set anyway, don't complain */ | |
1530 | if (verify_one_line_file(p, v) > 0) | |
1531 | return 0; | |
1532 | ||
769d324c | 1533 | log_link_warning_errno(link, r, "Cannot configure IPv6 forwarding for interface: %m"); |
15dee3f0 | 1534 | } |
5a8bcb67 LP |
1535 | |
1536 | return 0; | |
1537 | } | |
1538 | ||
49092e22 | 1539 | static int link_set_ipv6_privacy_extensions(Link *link) { |
1f0d9695 LP |
1540 | char buf[DECIMAL_STR_MAX(unsigned) + 1]; |
1541 | IPv6PrivacyExtensions s; | |
49092e22 SS |
1542 | const char *p = NULL; |
1543 | int r; | |
1544 | ||
1545 | /* Make this a NOP if IPv6 is not available */ | |
1546 | if (!socket_ipv6_is_supported()) | |
1547 | return 0; | |
1548 | ||
1f0d9695 LP |
1549 | s = link_ipv6_privacy_extensions(link); |
1550 | if (s == _IPV6_PRIVACY_EXTENSIONS_INVALID) | |
49092e22 SS |
1551 | return 0; |
1552 | ||
1553 | p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/use_tempaddr"); | |
1554 | xsprintf(buf, "%u", link->network->ipv6_privacy_extensions); | |
1555 | ||
1556 | r = write_string_file_no_create(p, buf); | |
1f0d9695 LP |
1557 | if (r < 0) { |
1558 | /* If the right value is set anyway, don't complain */ | |
1559 | if (verify_one_line_file(p, buf) > 0) | |
1560 | return 0; | |
1561 | ||
49092e22 | 1562 | log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m"); |
1f0d9695 | 1563 | } |
49092e22 SS |
1564 | |
1565 | return 0; | |
1566 | } | |
1567 | ||
a748b692 | 1568 | static int link_configure(Link *link) { |
02b59d57 TG |
1569 | int r; |
1570 | ||
ef1ba606 | 1571 | assert(link); |
b22d8a00 | 1572 | assert(link->network); |
8434fd5c | 1573 | assert(link->state == LINK_STATE_PENDING); |
a748b692 | 1574 | |
b98b483b AR |
1575 | r = link_set_bridge_fdb(link); |
1576 | if (r < 0) | |
1577 | return r; | |
1578 | ||
769d324c LP |
1579 | r = link_set_ipv4_forward(link); |
1580 | if (r < 0) | |
1581 | return r; | |
1582 | ||
1583 | r = link_set_ipv6_forward(link); | |
5a8bcb67 LP |
1584 | if (r < 0) |
1585 | return r; | |
1586 | ||
49092e22 SS |
1587 | r = link_set_ipv6_privacy_extensions(link); |
1588 | if (r < 0) | |
1589 | return r; | |
1590 | ||
78c958f8 | 1591 | if (link_ipv4ll_enabled(link)) { |
b22d8a00 | 1592 | r = ipv4ll_configure(link); |
eb34d4af TG |
1593 | if (r < 0) |
1594 | return r; | |
1595 | } | |
1596 | ||
78c958f8 | 1597 | if (link_dhcp4_enabled(link)) { |
3c9b8860 | 1598 | r = dhcp4_configure(link); |
eb34d4af TG |
1599 | if (r < 0) |
1600 | return r; | |
eb34d4af TG |
1601 | } |
1602 | ||
78c958f8 | 1603 | if (link_dhcp4_server_enabled(link)) { |
dd43110f TG |
1604 | r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex); |
1605 | if (r < 0) | |
1606 | return r; | |
1607 | ||
1608 | r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0); | |
1609 | if (r < 0) | |
1610 | return r; | |
dd43110f TG |
1611 | } |
1612 | ||
78c958f8 | 1613 | if (link_dhcp6_enabled(link)) { |
5c79bd79 | 1614 | r = icmp6_configure(link); |
4138fb2c PF |
1615 | if (r < 0) |
1616 | return r; | |
1617 | } | |
1618 | ||
ce43e484 SS |
1619 | if (link_lldp_enabled(link)) { |
1620 | r = sd_lldp_new(link->ifindex, link->ifname, &link->mac, &link->lldp); | |
1621 | if (r < 0) | |
1622 | return r; | |
1623 | ||
1624 | r = sd_lldp_attach_event(link->lldp, NULL, 0); | |
1625 | if (r < 0) | |
1626 | return r; | |
49699bac SS |
1627 | |
1628 | r = sd_lldp_set_callback(link->lldp, | |
1629 | lldp_handler, link); | |
1630 | if (r < 0) | |
1631 | return r; | |
ce43e484 SS |
1632 | } |
1633 | ||
a61bb41c | 1634 | if (link_has_carrier(link)) { |
1e9be60b TG |
1635 | r = link_acquire_conf(link); |
1636 | if (r < 0) | |
1637 | return r; | |
cc544d5f | 1638 | } |
1e9be60b | 1639 | |
3f265037 | 1640 | return link_enter_join_netdev(link); |
505f8da7 TG |
1641 | } |
1642 | ||
1c4baffc | 1643 | static int link_initialized_and_synced(sd_netlink *rtnl, sd_netlink_message *m, |
3c9b8860 | 1644 | void *userdata) { |
5da8149f | 1645 | _cleanup_link_unref_ Link *link = userdata; |
505f8da7 | 1646 | Network *network; |
505f8da7 TG |
1647 | int r; |
1648 | ||
1649 | assert(link); | |
1650 | assert(link->ifname); | |
1651 | assert(link->manager); | |
1652 | ||
8434fd5c | 1653 | if (link->state != LINK_STATE_PENDING) |
5da8149f | 1654 | return 1; |
505f8da7 | 1655 | |
6a7a4e4d | 1656 | log_link_debug(link, "Link state is up-to-date"); |
505f8da7 | 1657 | |
0d4ad91d AR |
1658 | r = link_new_bound_by_list(link); |
1659 | if (r < 0) | |
1660 | return r; | |
1661 | ||
1662 | r = link_handle_bound_by_list(link); | |
1663 | if (r < 0) | |
1664 | return r; | |
1665 | ||
3c9b8860 TG |
1666 | r = network_get(link->manager, link->udev_device, link->ifname, |
1667 | &link->mac, &network); | |
57bd6899 TG |
1668 | if (r == -ENOENT) { |
1669 | link_enter_unmanaged(link); | |
5da8149f | 1670 | return 1; |
57bd6899 TG |
1671 | } else if (r < 0) |
1672 | return r; | |
505f8da7 | 1673 | |
bd2efe92 | 1674 | if (link->flags & IFF_LOOPBACK) { |
d0d6a4cd | 1675 | if (network->link_local != ADDRESS_FAMILY_NO) |
6a7a4e4d | 1676 | log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link"); |
78c958f8 | 1677 | |
cb9fc36a | 1678 | if (network->dhcp != ADDRESS_FAMILY_NO) |
6a7a4e4d | 1679 | log_link_debug(link, "Ignoring DHCP clients for loopback link"); |
78c958f8 TG |
1680 | |
1681 | if (network->dhcp_server) | |
6a7a4e4d | 1682 | log_link_debug(link, "Ignoring DHCP server for loopback link"); |
bd2efe92 TG |
1683 | } |
1684 | ||
505f8da7 TG |
1685 | r = network_apply(link->manager, network, link); |
1686 | if (r < 0) | |
1687 | return r; | |
1688 | ||
0d4ad91d AR |
1689 | r = link_new_bound_to_list(link); |
1690 | if (r < 0) | |
1691 | return r; | |
1692 | ||
a748b692 TG |
1693 | r = link_configure(link); |
1694 | if (r < 0) | |
1695 | return r; | |
1696 | ||
5da8149f | 1697 | return 1; |
505f8da7 TG |
1698 | } |
1699 | ||
4f561e8e | 1700 | int link_initialized(Link *link, struct udev_device *device) { |
1c4baffc | 1701 | _cleanup_netlink_message_unref_ sd_netlink_message *req = NULL; |
4f561e8e TG |
1702 | int r; |
1703 | ||
1704 | assert(link); | |
1705 | assert(link->manager); | |
1706 | assert(link->manager->rtnl); | |
1707 | assert(device); | |
1708 | ||
8434fd5c | 1709 | if (link->state != LINK_STATE_PENDING) |
4f561e8e TG |
1710 | return 0; |
1711 | ||
679b3605 TG |
1712 | if (link->udev_device) |
1713 | return 0; | |
1714 | ||
79008bdd | 1715 | log_link_debug(link, "udev initialized link"); |
4f561e8e TG |
1716 | |
1717 | link->udev_device = udev_device_ref(device); | |
1718 | ||
3c9b8860 TG |
1719 | /* udev has initialized the link, but we don't know if we have yet |
1720 | * processed the NEWLINK messages with the latest state. Do a GETLINK, | |
1721 | * when it returns we know that the pending NEWLINKs have already been | |
1722 | * processed and that we are up-to-date */ | |
4f561e8e | 1723 | |
3c9b8860 TG |
1724 | r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK, |
1725 | link->ifindex); | |
4f561e8e TG |
1726 | if (r < 0) |
1727 | return r; | |
1728 | ||
1c4baffc | 1729 | r = sd_netlink_call_async(link->manager->rtnl, req, |
3c9b8860 | 1730 | link_initialized_and_synced, link, 0, NULL); |
4f561e8e TG |
1731 | if (r < 0) |
1732 | return r; | |
1733 | ||
5da8149f TG |
1734 | link_ref(link); |
1735 | ||
4f561e8e TG |
1736 | return 0; |
1737 | } | |
1738 | ||
5a8bcb67 LP |
1739 | static Address* link_get_equal_address(Link *link, Address *needle) { |
1740 | Address *i; | |
1741 | ||
1742 | assert(link); | |
1743 | assert(needle); | |
1744 | ||
1745 | LIST_FOREACH(addresses, i, link->addresses) | |
1746 | if (address_equal(i, needle)) | |
1747 | return i; | |
1748 | ||
1749 | return NULL; | |
1750 | } | |
1751 | ||
1c4baffc | 1752 | int link_rtnl_process_address(sd_netlink *rtnl, sd_netlink_message *message, void *userdata) { |
fbbeb65a TG |
1753 | Manager *m = userdata; |
1754 | Link *link = NULL; | |
1755 | uint16_t type; | |
1756 | _cleanup_address_free_ Address *address = NULL; | |
851c9f82 | 1757 | unsigned char flags; |
5a8bcb67 LP |
1758 | Address *existing; |
1759 | char buf[INET6_ADDRSTRLEN], valid_buf[FORMAT_TIMESPAN_MAX]; | |
c6d3b303 | 1760 | const char *valid_str = NULL; |
fbbeb65a TG |
1761 | int r, ifindex; |
1762 | ||
1763 | assert(rtnl); | |
1764 | assert(message); | |
1765 | assert(m); | |
1766 | ||
1c4baffc TG |
1767 | if (sd_netlink_message_is_error(message)) { |
1768 | r = sd_netlink_message_get_errno(message); | |
45af44d4 TG |
1769 | if (r < 0) |
1770 | log_warning_errno(r, "rtnl: failed to receive address: %m"); | |
1771 | ||
1772 | return 0; | |
1773 | } | |
1774 | ||
1c4baffc | 1775 | r = sd_netlink_message_get_type(message, &type); |
fbbeb65a | 1776 | if (r < 0) { |
6a7a4e4d | 1777 | log_warning_errno(r, "rtnl: could not get message type: %m"); |
fbbeb65a | 1778 | return 0; |
cdfee943 TG |
1779 | } else if (type != RTM_NEWADDR && type != RTM_DELADDR) { |
1780 | log_warning("rtnl: received unexpected message type when processing address"); | |
1781 | return 0; | |
fbbeb65a TG |
1782 | } |
1783 | ||
1784 | r = sd_rtnl_message_addr_get_ifindex(message, &ifindex); | |
45af44d4 | 1785 | if (r < 0) { |
cdfee943 | 1786 | log_warning_errno(r, "rtnl: could not get ifindex from address: %m"); |
45af44d4 TG |
1787 | return 0; |
1788 | } else if (ifindex <= 0) { | |
1789 | log_warning("rtnl: received address message with invalid ifindex: %d", ifindex); | |
fbbeb65a TG |
1790 | return 0; |
1791 | } else { | |
1792 | r = link_get(m, ifindex, &link); | |
1793 | if (r < 0 || !link) { | |
6a24f148 TG |
1794 | /* when enumerating we might be out of sync, but we will |
1795 | * get the address again, so just ignore it */ | |
1796 | if (!m->enumerating) | |
1797 | log_warning("rtnl: received address for nonexistent link (%d), ignoring", ifindex); | |
fbbeb65a TG |
1798 | return 0; |
1799 | } | |
1800 | } | |
1801 | ||
1802 | r = address_new_dynamic(&address); | |
1803 | if (r < 0) | |
393c0c5e | 1804 | return r; |
fbbeb65a TG |
1805 | |
1806 | r = sd_rtnl_message_addr_get_family(message, &address->family); | |
1807 | if (r < 0 || !IN_SET(address->family, AF_INET, AF_INET6)) { | |
6a7a4e4d | 1808 | log_link_warning(link, "rtnl: received address with invalid family, ignoring."); |
fbbeb65a TG |
1809 | return 0; |
1810 | } | |
1811 | ||
1812 | r = sd_rtnl_message_addr_get_prefixlen(message, &address->prefixlen); | |
1813 | if (r < 0) { | |
6a7a4e4d | 1814 | log_link_warning_errno(link, r, "rtnl: received address with invalid prefixlen, ignoring: %m"); |
e375dcde TG |
1815 | return 0; |
1816 | } | |
1817 | ||
1818 | r = sd_rtnl_message_addr_get_scope(message, &address->scope); | |
1819 | if (r < 0) { | |
6a7a4e4d | 1820 | log_link_warning_errno(link, r, "rtnl: received address with invalid scope, ignoring: %m"); |
fbbeb65a TG |
1821 | return 0; |
1822 | } | |
1823 | ||
851c9f82 | 1824 | r = sd_rtnl_message_addr_get_flags(message, &flags); |
81163121 | 1825 | if (r < 0) { |
6a7a4e4d | 1826 | log_link_warning_errno(link, r, "rtnl: received address with invalid flags, ignoring: %m"); |
81163121 TG |
1827 | return 0; |
1828 | } | |
851c9f82 | 1829 | address->flags = flags; |
81163121 | 1830 | |
fbbeb65a TG |
1831 | switch (address->family) { |
1832 | case AF_INET: | |
1c4baffc | 1833 | r = sd_netlink_message_read_in_addr(message, IFA_LOCAL, &address->in_addr.in); |
fbbeb65a | 1834 | if (r < 0) { |
6a7a4e4d | 1835 | log_link_warning_errno(link, r, "rtnl: received address without valid address, ignoring: %m"); |
fbbeb65a TG |
1836 | return 0; |
1837 | } | |
1838 | ||
1839 | break; | |
1840 | ||
1841 | case AF_INET6: | |
1c4baffc | 1842 | r = sd_netlink_message_read_in6_addr(message, IFA_ADDRESS, &address->in_addr.in6); |
fbbeb65a | 1843 | if (r < 0) { |
6a7a4e4d | 1844 | log_link_warning_errno(link, r, "rtnl: received address without valid address, ignoring: %m"); |
fbbeb65a TG |
1845 | return 0; |
1846 | } | |
1847 | ||
1848 | break; | |
1849 | ||
1850 | default: | |
1851 | assert_not_reached("invalid address family"); | |
1852 | } | |
1853 | ||
5a8bcb67 | 1854 | if (!inet_ntop(address->family, &address->in_addr, buf, INET6_ADDRSTRLEN)) { |
6a7a4e4d | 1855 | log_link_warning(link, "Could not print address"); |
fbbeb65a TG |
1856 | return 0; |
1857 | } | |
1858 | ||
1c4baffc | 1859 | r = sd_netlink_message_read_cache_info(message, IFA_CACHEINFO, &address->cinfo); |
c6d3b303 TG |
1860 | if (r >= 0) { |
1861 | if (address->cinfo.ifa_valid == CACHE_INFO_INFINITY_LIFE_TIME) | |
1862 | valid_str = "ever"; | |
1863 | else | |
1864 | valid_str = format_timespan(valid_buf, FORMAT_TIMESPAN_MAX, | |
1865 | address->cinfo.ifa_valid * USEC_PER_SEC, | |
1866 | USEC_PER_SEC); | |
1867 | } | |
1868 | ||
5a8bcb67 LP |
1869 | existing = link_get_equal_address(link, address); |
1870 | ||
1871 | switch (type) { | |
1872 | case RTM_NEWADDR: | |
1873 | if (existing) { | |
1874 | log_link_debug(link, "Updating address: %s/%u (valid for %s)", buf, address->prefixlen, valid_str); | |
428fd0a7 | 1875 | |
428fd0a7 | 1876 | |
5a8bcb67 LP |
1877 | existing->scope = address->scope; |
1878 | existing->flags = address->flags; | |
1879 | existing->cinfo = address->cinfo; | |
428fd0a7 | 1880 | |
5a8bcb67 LP |
1881 | } else { |
1882 | log_link_debug(link, "Adding address: %s/%u (valid for %s)", buf, address->prefixlen, valid_str); | |
428fd0a7 | 1883 | |
5a8bcb67 LP |
1884 | LIST_PREPEND(addresses, link->addresses, address); |
1885 | address_establish(address, link); | |
fbbeb65a | 1886 | |
5a8bcb67 | 1887 | address = NULL; |
428fd0a7 | 1888 | |
5a8bcb67 LP |
1889 | link_save(link); |
1890 | } | |
f5602be9 | 1891 | |
428fd0a7 | 1892 | break; |
5a8bcb67 | 1893 | |
fbbeb65a | 1894 | case RTM_DELADDR: |
428fd0a7 | 1895 | |
5a8bcb67 LP |
1896 | if (existing) { |
1897 | log_link_debug(link, "Removing address: %s/%u (valid for %s)", buf, address->prefixlen, valid_str); | |
1898 | address_release(existing, link); | |
1899 | LIST_REMOVE(addresses, link->addresses, existing); | |
1900 | address_free(existing); | |
393c0c5e | 1901 | } else |
5a8bcb67 | 1902 | log_link_warning(link, "Removing non-existent address: %s/%u (valid for %s)", buf, address->prefixlen, valid_str); |
f5602be9 | 1903 | |
fbbeb65a TG |
1904 | break; |
1905 | default: | |
1906 | assert_not_reached("Received invalid RTNL message type"); | |
1907 | } | |
1908 | ||
1909 | return 1; | |
1910 | } | |
1911 | ||
1c4baffc | 1912 | int link_add(Manager *m, sd_netlink_message *message, Link **ret) { |
505f8da7 TG |
1913 | Link *link; |
1914 | _cleanup_udev_device_unref_ struct udev_device *device = NULL; | |
1915 | char ifindex_str[2 + DECIMAL_STR_MAX(int)]; | |
1916 | int r; | |
1917 | ||
1918 | assert(m); | |
fbbeb65a | 1919 | assert(m->rtnl); |
505f8da7 TG |
1920 | assert(message); |
1921 | assert(ret); | |
1922 | ||
1923 | r = link_new(m, message, ret); | |
1924 | if (r < 0) | |
1925 | return r; | |
1926 | ||
1927 | link = *ret; | |
1928 | ||
6a7a4e4d | 1929 | log_link_debug(link, "Link %d added", link->ifindex); |
505f8da7 TG |
1930 | |
1931 | if (detect_container(NULL) <= 0) { | |
1932 | /* not in a container, udev will be around */ | |
ae06ab10 | 1933 | sprintf(ifindex_str, "n%d", link->ifindex); |
505f8da7 | 1934 | device = udev_device_new_from_device_id(m->udev, ifindex_str); |
6a7a4e4d LP |
1935 | if (!device) |
1936 | return log_link_warning_errno(link, errno, "Could not find udev device: %m"); | |
505f8da7 | 1937 | |
3c4cb064 | 1938 | if (udev_device_get_is_initialized(device) <= 0) { |
505f8da7 | 1939 | /* not yet ready */ |
79008bdd | 1940 | log_link_debug(link, "link pending udev initialization..."); |
505f8da7 | 1941 | return 0; |
3c4cb064 | 1942 | } |
505f8da7 | 1943 | |
4f561e8e TG |
1944 | r = link_initialized(link, device); |
1945 | if (r < 0) | |
1946 | return r; | |
1947 | } else { | |
5da8149f TG |
1948 | /* we are calling a callback directly, so must take a ref */ |
1949 | link_ref(link); | |
1950 | ||
4f561e8e TG |
1951 | r = link_initialized_and_synced(m->rtnl, NULL, link); |
1952 | if (r < 0) | |
1953 | return r; | |
1954 | } | |
505f8da7 | 1955 | |
a748b692 TG |
1956 | return 0; |
1957 | } | |
1958 | ||
9c0a72f9 TG |
1959 | static int link_carrier_gained(Link *link) { |
1960 | int r; | |
1961 | ||
1962 | assert(link); | |
1963 | ||
1964 | if (link->network) { | |
1965 | r = link_acquire_conf(link); | |
1966 | if (r < 0) { | |
1967 | link_enter_failed(link); | |
1968 | return r; | |
1969 | } | |
1970 | } | |
1971 | ||
0d4ad91d AR |
1972 | r = link_handle_bound_by_list(link); |
1973 | if (r < 0) | |
1974 | return r; | |
1975 | ||
9c0a72f9 TG |
1976 | return 0; |
1977 | } | |
1978 | ||
1979 | static int link_carrier_lost(Link *link) { | |
1980 | int r; | |
1981 | ||
1982 | assert(link); | |
1983 | ||
1984 | r = link_stop_clients(link); | |
1985 | if (r < 0) { | |
1986 | link_enter_failed(link); | |
1987 | return r; | |
1988 | } | |
1989 | ||
0d4ad91d AR |
1990 | r = link_handle_bound_by_list(link); |
1991 | if (r < 0) | |
1992 | return r; | |
1993 | ||
9c0a72f9 TG |
1994 | return 0; |
1995 | } | |
1996 | ||
1997 | int link_carrier_reset(Link *link) { | |
1998 | int r; | |
1999 | ||
2000 | assert(link); | |
2001 | ||
2002 | if (link_has_carrier(link)) { | |
2003 | r = link_carrier_lost(link); | |
2004 | if (r < 0) | |
2005 | return r; | |
2006 | ||
2007 | r = link_carrier_gained(link); | |
2008 | if (r < 0) | |
2009 | return r; | |
2010 | ||
6a7a4e4d | 2011 | log_link_info(link, "Reset carrier"); |
9c0a72f9 TG |
2012 | } |
2013 | ||
2014 | return 0; | |
2015 | } | |
2016 | ||
2017 | ||
1c4baffc | 2018 | int link_update(Link *link, sd_netlink_message *m) { |
c49b33ac | 2019 | struct ether_addr mac; |
ca4e095a | 2020 | const char *ifname; |
afe7fd56 | 2021 | uint32_t mtu; |
a61bb41c | 2022 | bool had_carrier, carrier_gained, carrier_lost; |
22936833 TG |
2023 | int r; |
2024 | ||
dd3efc09 | 2025 | assert(link); |
b8941f74 | 2026 | assert(link->ifname); |
22936833 TG |
2027 | assert(m); |
2028 | ||
7619683b TG |
2029 | if (link->state == LINK_STATE_LINGER) { |
2030 | link_ref(link); | |
6a7a4e4d | 2031 | log_link_info(link, "Link readded"); |
e331e246 | 2032 | link_set_state(link, LINK_STATE_ENSLAVING); |
0d4ad91d AR |
2033 | |
2034 | r = link_new_carrier_maps(link); | |
2035 | if (r < 0) | |
2036 | return r; | |
7619683b TG |
2037 | } |
2038 | ||
1c4baffc | 2039 | r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname); |
b8941f74 | 2040 | if (r >= 0 && !streq(ifname, link->ifname)) { |
6a7a4e4d | 2041 | log_link_info(link, "Renamed to %s", ifname); |
b8941f74 | 2042 | |
0d4ad91d AR |
2043 | link_free_carrier_maps(link); |
2044 | ||
b8941f74 TG |
2045 | free(link->ifname); |
2046 | link->ifname = strdup(ifname); | |
2047 | if (!link->ifname) | |
2048 | return -ENOMEM; | |
0d4ad91d AR |
2049 | |
2050 | r = link_new_carrier_maps(link); | |
2051 | if (r < 0) | |
2052 | return r; | |
b8941f74 TG |
2053 | } |
2054 | ||
1c4baffc | 2055 | r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu); |
afe7fd56 TG |
2056 | if (r >= 0 && mtu > 0) { |
2057 | link->mtu = mtu; | |
2058 | if (!link->original_mtu) { | |
2059 | link->original_mtu = mtu; | |
6a7a4e4d | 2060 | log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu); |
afe7fd56 TG |
2061 | } |
2062 | ||
2063 | if (link->dhcp_client) { | |
3c9b8860 TG |
2064 | r = sd_dhcp_client_set_mtu(link->dhcp_client, |
2065 | link->mtu); | |
afe7fd56 | 2066 | if (r < 0) { |
6a7a4e4d | 2067 | log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m"); |
afe7fd56 TG |
2068 | return r; |
2069 | } | |
2070 | } | |
9842de0d | 2071 | } |
69629de9 | 2072 | |
e9189a1f TG |
2073 | /* The kernel may broadcast NEWLINK messages without the MAC address |
2074 | set, simply ignore them. */ | |
1c4baffc | 2075 | r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac); |
e9189a1f | 2076 | if (r >= 0) { |
3c9b8860 TG |
2077 | if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet, |
2078 | ETH_ALEN)) { | |
c49b33ac | 2079 | |
3c9b8860 TG |
2080 | memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet, |
2081 | ETH_ALEN); | |
c49b33ac | 2082 | |
79008bdd | 2083 | log_link_debug(link, "MAC address: " |
20861203 TG |
2084 | "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx", |
2085 | mac.ether_addr_octet[0], | |
2086 | mac.ether_addr_octet[1], | |
2087 | mac.ether_addr_octet[2], | |
2088 | mac.ether_addr_octet[3], | |
2089 | mac.ether_addr_octet[4], | |
2090 | mac.ether_addr_octet[5]); | |
c49b33ac | 2091 | |
20861203 TG |
2092 | if (link->ipv4ll) { |
2093 | r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac); | |
6a7a4e4d LP |
2094 | if (r < 0) |
2095 | return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m"); | |
c49b33ac | 2096 | } |
c49b33ac | 2097 | |
20861203 | 2098 | if (link->dhcp_client) { |
3c9b8860 | 2099 | r = sd_dhcp_client_set_mac(link->dhcp_client, |
76253e73 DW |
2100 | (const uint8_t *) &link->mac, |
2101 | sizeof (link->mac), | |
2102 | ARPHRD_ETHER); | |
6a7a4e4d LP |
2103 | if (r < 0) |
2104 | return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m"); | |
c49b33ac | 2105 | } |
4138fb2c PF |
2106 | |
2107 | if (link->dhcp6_client) { | |
2108 | r = sd_dhcp6_client_set_mac(link->dhcp6_client, | |
76253e73 DW |
2109 | (const uint8_t *) &link->mac, |
2110 | sizeof (link->mac), | |
2111 | ARPHRD_ETHER); | |
6a7a4e4d LP |
2112 | if (r < 0) |
2113 | return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m"); | |
4138fb2c | 2114 | } |
c49b33ac | 2115 | } |
4f882b2a TG |
2116 | } |
2117 | ||
a61bb41c TG |
2118 | had_carrier = link_has_carrier(link); |
2119 | ||
2120 | r = link_update_flags(link, m); | |
2121 | if (r < 0) | |
2122 | return r; | |
2123 | ||
2124 | carrier_gained = !had_carrier && link_has_carrier(link); | |
2125 | carrier_lost = had_carrier && !link_has_carrier(link); | |
2126 | ||
2127 | if (carrier_gained) { | |
6a7a4e4d | 2128 | log_link_info(link, "Gained carrier"); |
a61bb41c | 2129 | |
9c0a72f9 TG |
2130 | r = link_carrier_gained(link); |
2131 | if (r < 0) | |
2132 | return r; | |
a61bb41c | 2133 | } else if (carrier_lost) { |
6a7a4e4d | 2134 | log_link_info(link, "Lost carrier"); |
a61bb41c | 2135 | |
9c0a72f9 TG |
2136 | r = link_carrier_lost(link); |
2137 | if (r < 0) | |
a61bb41c | 2138 | return r; |
9c0a72f9 | 2139 | |
a61bb41c TG |
2140 | } |
2141 | ||
2142 | return 0; | |
dd3efc09 | 2143 | } |
fe8db0c5 | 2144 | |
e375dcde | 2145 | static void link_update_operstate(Link *link) { |
e331e246 | 2146 | LinkOperationalState operstate; |
e375dcde TG |
2147 | assert(link); |
2148 | ||
2149 | if (link->kernel_operstate == IF_OPER_DORMANT) | |
e331e246 | 2150 | operstate = LINK_OPERSTATE_DORMANT; |
a61bb41c | 2151 | else if (link_has_carrier(link)) { |
e375dcde TG |
2152 | Address *address; |
2153 | uint8_t scope = RT_SCOPE_NOWHERE; | |
2154 | ||
2155 | /* if we have carrier, check what addresses we have */ | |
2156 | LIST_FOREACH(addresses, address, link->addresses) { | |
81163121 TG |
2157 | if (address->flags & (IFA_F_TENTATIVE | IFA_F_DEPRECATED)) |
2158 | continue; | |
2159 | ||
e375dcde TG |
2160 | if (address->scope < scope) |
2161 | scope = address->scope; | |
2162 | } | |
2163 | ||
2164 | if (scope < RT_SCOPE_SITE) | |
2165 | /* universally accessible addresses found */ | |
e331e246 | 2166 | operstate = LINK_OPERSTATE_ROUTABLE; |
e375dcde TG |
2167 | else if (scope < RT_SCOPE_HOST) |
2168 | /* only link or site local addresses found */ | |
e331e246 | 2169 | operstate = LINK_OPERSTATE_DEGRADED; |
e375dcde TG |
2170 | else |
2171 | /* no useful addresses found */ | |
e331e246 | 2172 | operstate = LINK_OPERSTATE_CARRIER; |
54cba0b1 | 2173 | } else if (link->flags & IFF_UP) |
e331e246 | 2174 | operstate = LINK_OPERSTATE_NO_CARRIER; |
54cba0b1 | 2175 | else |
e331e246 TG |
2176 | operstate = LINK_OPERSTATE_OFF; |
2177 | ||
2178 | if (link->operstate != operstate) { | |
2179 | link->operstate = operstate; | |
2180 | link_send_changed(link, "OperationalState", NULL); | |
2181 | } | |
e375dcde TG |
2182 | } |
2183 | ||
fe8db0c5 | 2184 | int link_save(Link *link) { |
68a8723c | 2185 | _cleanup_free_ char *temp_path = NULL; |
fe8db0c5 | 2186 | _cleanup_fclose_ FILE *f = NULL; |
e375dcde | 2187 | const char *admin_state, *oper_state; |
fe8db0c5 TG |
2188 | int r; |
2189 | ||
2190 | assert(link); | |
2191 | assert(link->state_file); | |
68a8723c | 2192 | assert(link->lease_file); |
bbf7c048 TG |
2193 | assert(link->manager); |
2194 | ||
e375dcde TG |
2195 | link_update_operstate(link); |
2196 | ||
bbf7c048 TG |
2197 | r = manager_save(link->manager); |
2198 | if (r < 0) | |
2199 | return r; | |
fe8db0c5 | 2200 | |
370e9930 TG |
2201 | if (link->state == LINK_STATE_LINGER) { |
2202 | unlink(link->state_file); | |
2203 | return 0; | |
2204 | } | |
2205 | ||
deb2e523 TG |
2206 | admin_state = link_state_to_string(link->state); |
2207 | assert(admin_state); | |
2208 | ||
e375dcde TG |
2209 | oper_state = link_operstate_to_string(link->operstate); |
2210 | assert(oper_state); | |
deb2e523 | 2211 | |
fe8db0c5 TG |
2212 | r = fopen_temporary(link->state_file, &f, &temp_path); |
2213 | if (r < 0) | |
6a7a4e4d | 2214 | goto fail; |
fe8db0c5 TG |
2215 | |
2216 | fchmod(fileno(f), 0644); | |
2217 | ||
2218 | fprintf(f, | |
2219 | "# This is private data. Do not parse.\n" | |
deb2e523 | 2220 | "ADMIN_STATE=%s\n" |
6dcaa6f5 TG |
2221 | "OPER_STATE=%s\n", |
2222 | admin_state, oper_state); | |
fe8db0c5 | 2223 | |
bcb7a07e | 2224 | if (link->network) { |
ea352b40 LP |
2225 | char **address, **domain; |
2226 | bool space; | |
b0e39c82 | 2227 | |
adc5b2e2 TG |
2228 | fprintf(f, "NETWORK_FILE=%s\n", link->network->filename); |
2229 | ||
b0e39c82 | 2230 | fputs("DNS=", f); |
ea352b40 LP |
2231 | space = false; |
2232 | STRV_FOREACH(address, link->network->dns) { | |
2233 | if (space) | |
2234 | fputc(' ', f); | |
2235 | fputs(*address, f); | |
2236 | space = true; | |
2237 | } | |
d5314fff | 2238 | |
b0e39c82 TG |
2239 | if (link->network->dhcp_dns && |
2240 | link->dhcp_lease) { | |
2241 | const struct in_addr *addresses; | |
2242 | ||
2243 | r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses); | |
2244 | if (r > 0) { | |
ea352b40 LP |
2245 | if (space) |
2246 | fputc(' ', f); | |
b0e39c82 | 2247 | serialize_in_addrs(f, addresses, r); |
b0e39c82 TG |
2248 | } |
2249 | } | |
2250 | ||
b0e39c82 TG |
2251 | fputs("\n", f); |
2252 | ||
2253 | fprintf(f, "NTP="); | |
ea352b40 LP |
2254 | space = false; |
2255 | STRV_FOREACH(address, link->network->ntp) { | |
2256 | if (space) | |
2257 | fputc(' ', f); | |
2258 | fputs(*address, f); | |
2259 | space = true; | |
2260 | } | |
d5314fff | 2261 | |
b0e39c82 TG |
2262 | if (link->network->dhcp_ntp && |
2263 | link->dhcp_lease) { | |
2264 | const struct in_addr *addresses; | |
2265 | ||
2266 | r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses); | |
2267 | if (r > 0) { | |
ea352b40 LP |
2268 | if (space) |
2269 | fputc(' ', f); | |
b0e39c82 | 2270 | serialize_in_addrs(f, addresses, r); |
b0e39c82 TG |
2271 | } |
2272 | } | |
2273 | ||
b0e39c82 | 2274 | fputs("\n", f); |
bd8f6538 | 2275 | |
6192b846 | 2276 | fprintf(f, "DOMAINS="); |
ea352b40 LP |
2277 | space = false; |
2278 | STRV_FOREACH(domain, link->network->domains) { | |
2279 | if (space) | |
2280 | fputc(' ', f); | |
2281 | fputs(*domain, f); | |
2282 | space = true; | |
2283 | } | |
d5314fff | 2284 | |
ad0734e8 | 2285 | if (link->network->dhcp_domains && |
9b4d1882 TG |
2286 | link->dhcp_lease) { |
2287 | const char *domainname; | |
2288 | ||
2289 | r = sd_dhcp_lease_get_domainname(link->dhcp_lease, &domainname); | |
6192b846 | 2290 | if (r >= 0) { |
ea352b40 LP |
2291 | if (space) |
2292 | fputc(' ', f); | |
6192b846 | 2293 | fputs(domainname, f); |
6192b846 | 2294 | } |
9b4d1882 TG |
2295 | } |
2296 | ||
6192b846 TG |
2297 | fputs("\n", f); |
2298 | ||
67272d15 TG |
2299 | fprintf(f, "WILDCARD_DOMAIN=%s\n", |
2300 | yes_no(link->network->wildcard_domain)); | |
2301 | ||
3c9b8860 TG |
2302 | fprintf(f, "LLMNR=%s\n", |
2303 | llmnr_support_to_string(link->network->llmnr)); | |
bcb7a07e | 2304 | } |
7374f9d8 | 2305 | |
0d4ad91d AR |
2306 | if (!hashmap_isempty(link->bound_to_links)) { |
2307 | Link *carrier; | |
2308 | Iterator i; | |
2309 | bool space = false; | |
2310 | ||
2311 | fputs("CARRIER_BOUND_TO=", f); | |
2312 | HASHMAP_FOREACH(carrier, link->bound_to_links, i) { | |
2313 | if (space) | |
2314 | fputc(' ', f); | |
2315 | fputs(carrier->ifname, f); | |
2316 | space = true; | |
2317 | } | |
2318 | ||
2319 | fputs("\n", f); | |
2320 | } | |
2321 | ||
2322 | if (!hashmap_isempty(link->bound_by_links)) { | |
2323 | Link *carrier; | |
2324 | Iterator i; | |
2325 | bool space = false; | |
2326 | ||
2327 | fputs("CARRIER_BOUND_BY=", f); | |
0d4ad91d AR |
2328 | HASHMAP_FOREACH(carrier, link->bound_by_links, i) { |
2329 | if (space) | |
2330 | fputc(' ', f); | |
2331 | fputs(carrier->ifname, f); | |
2332 | space = true; | |
2333 | } | |
2334 | ||
2335 | fputs("\n", f); | |
2336 | } | |
2337 | ||
fe8db0c5 | 2338 | if (link->dhcp_lease) { |
d9876a52 TG |
2339 | assert(link->network); |
2340 | ||
1dc24d5f | 2341 | r = sd_dhcp_lease_save(link->dhcp_lease, link->lease_file); |
fe8db0c5 | 2342 | if (r < 0) |
c2d6bd61 | 2343 | goto fail; |
fe8db0c5 | 2344 | |
7374f9d8 | 2345 | fprintf(f, |
b0e39c82 TG |
2346 | "DHCP_LEASE=%s\n", |
2347 | link->lease_file); | |
deb2e523 | 2348 | } else |
68a8723c | 2349 | unlink(link->lease_file); |
fe8db0c5 | 2350 | |
49699bac SS |
2351 | if (link->lldp) { |
2352 | assert(link->network); | |
2353 | ||
2354 | r = sd_lldp_save(link->lldp, link->lldp_file); | |
2355 | if (r < 0) | |
2356 | goto fail; | |
2357 | ||
2358 | fprintf(f, | |
2359 | "LLDP_FILE=%s\n", | |
2360 | link->lldp_file); | |
2361 | } else | |
2362 | unlink(link->lldp_file); | |
2363 | ||
c2d6bd61 LP |
2364 | r = fflush_and_check(f); |
2365 | if (r < 0) | |
2366 | goto fail; | |
fe8db0c5 | 2367 | |
c2d6bd61 | 2368 | if (rename(temp_path, link->state_file) < 0) { |
fe8db0c5 | 2369 | r = -errno; |
c2d6bd61 | 2370 | goto fail; |
fe8db0c5 TG |
2371 | } |
2372 | ||
c2d6bd61 | 2373 | return 0; |
c2d6bd61 | 2374 | fail: |
6a7a4e4d LP |
2375 | log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file); |
2376 | (void) unlink(link->state_file); | |
2377 | ||
2378 | if (temp_path) | |
2379 | (void) unlink(temp_path); | |
2380 | ||
fe8db0c5 TG |
2381 | return r; |
2382 | } | |
2383 | ||
2384 | static const char* const link_state_table[_LINK_STATE_MAX] = { | |
8434fd5c | 2385 | [LINK_STATE_PENDING] = "pending", |
fe8db0c5 TG |
2386 | [LINK_STATE_ENSLAVING] = "configuring", |
2387 | [LINK_STATE_SETTING_ADDRESSES] = "configuring", | |
2388 | [LINK_STATE_SETTING_ROUTES] = "configuring", | |
2389 | [LINK_STATE_CONFIGURED] = "configured", | |
57bd6899 | 2390 | [LINK_STATE_UNMANAGED] = "unmanaged", |
fe8db0c5 | 2391 | [LINK_STATE_FAILED] = "failed", |
370e9930 | 2392 | [LINK_STATE_LINGER] = "linger", |
fe8db0c5 TG |
2393 | }; |
2394 | ||
2395 | DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState); | |
e375dcde TG |
2396 | |
2397 | static const char* const link_operstate_table[_LINK_OPERSTATE_MAX] = { | |
d3df0e39 TG |
2398 | [LINK_OPERSTATE_OFF] = "off", |
2399 | [LINK_OPERSTATE_NO_CARRIER] = "no-carrier", | |
e375dcde TG |
2400 | [LINK_OPERSTATE_DORMANT] = "dormant", |
2401 | [LINK_OPERSTATE_CARRIER] = "carrier", | |
2402 | [LINK_OPERSTATE_DEGRADED] = "degraded", | |
2403 | [LINK_OPERSTATE_ROUTABLE] = "routable", | |
2404 | }; | |
2405 | ||
2406 | DEFINE_STRING_TABLE_LOOKUP(link_operstate, LinkOperationalState); |