]>
Commit | Line | Data |
---|---|---|
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 | ||
091a364c | 22 | #include <sys/socket.h> |
bbf7c048 | 23 | #include <linux/if.h> |
3bef724f | 24 | |
fc2f9534 | 25 | #include "sd-daemon.h" |
07630cea | 26 | #include "sd-netlink.h" |
fc2f9534 | 27 | |
b5efdb8a | 28 | #include "alloc-util.h" |
a97dcc12 | 29 | #include "bus-util.h" |
07630cea | 30 | #include "conf-parser.h" |
a97dcc12 | 31 | #include "def.h" |
3ffd4af2 | 32 | #include "fd-util.h" |
0d39fa9c | 33 | #include "fileio.h" |
07630cea | 34 | #include "libudev-private.h" |
4f5f911e | 35 | #include "local-addresses.h" |
07630cea | 36 | #include "netlink-util.h" |
fc2f9534 | 37 | #include "networkd.h" |
07630cea LP |
38 | #include "path-util.h" |
39 | #include "set.h" | |
40 | #include "udev-util.h" | |
41 | #include "virt.h" | |
505f8da7 | 42 | |
be660c37 AR |
43 | /* use 8 MB for receive socket kernel queue. */ |
44 | #define RCVBUF_SIZE (8*1024*1024) | |
45 | ||
2ad8416d ZJS |
46 | const char* const network_dirs[] = { |
47 | "/etc/systemd/network", | |
48 | "/run/systemd/network", | |
49 | "/usr/lib/systemd/network", | |
eed0eee8 | 50 | #ifdef HAVE_SPLIT_USR |
2ad8416d ZJS |
51 | "/lib/systemd/network", |
52 | #endif | |
53 | NULL}; | |
54 | ||
11bf3cce LP |
55 | static int setup_default_address_pool(Manager *m) { |
56 | AddressPool *p; | |
57 | int r; | |
58 | ||
59 | assert(m); | |
60 | ||
61 | /* Add in the well-known private address ranges. */ | |
62 | ||
63 | r = address_pool_new_from_string(m, &p, AF_INET6, "fc00::", 7); | |
64 | if (r < 0) | |
65 | return r; | |
66 | ||
67 | r = address_pool_new_from_string(m, &p, AF_INET, "192.168.0.0", 16); | |
68 | if (r < 0) | |
69 | return r; | |
70 | ||
71 | r = address_pool_new_from_string(m, &p, AF_INET, "172.16.0.0", 12); | |
72 | if (r < 0) | |
73 | return r; | |
74 | ||
75 | r = address_pool_new_from_string(m, &p, AF_INET, "10.0.0.0", 8); | |
76 | if (r < 0) | |
77 | return r; | |
78 | ||
79 | return 0; | |
80 | } | |
81 | ||
9c0a72f9 TG |
82 | static int on_bus_retry(sd_event_source *s, usec_t usec, void *userdata) { |
83 | Manager *m = userdata; | |
84 | ||
85 | assert(s); | |
86 | assert(m); | |
87 | ||
88 | m->bus_retry_event_source = sd_event_source_unref(m->bus_retry_event_source); | |
89 | ||
90 | manager_connect_bus(m); | |
91 | ||
92 | return 0; | |
93 | } | |
94 | ||
95 | static int manager_reset_all(Manager *m) { | |
96 | Link *link; | |
97 | Iterator i; | |
98 | int r; | |
99 | ||
100 | assert(m); | |
101 | ||
102 | HASHMAP_FOREACH(link, m->links, i) { | |
103 | r = link_carrier_reset(link); | |
104 | if (r < 0) | |
2f3cf1f9 | 105 | log_link_warning_errno(link, r, "Could not reset carrier: %m"); |
9c0a72f9 TG |
106 | } |
107 | ||
108 | return 0; | |
109 | } | |
110 | ||
19070062 | 111 | static int match_prepare_for_sleep(sd_bus_message *message, void *userdata, sd_bus_error *ret_error) { |
9c0a72f9 TG |
112 | Manager *m = userdata; |
113 | int b, r; | |
114 | ||
19070062 | 115 | assert(message); |
9c0a72f9 TG |
116 | |
117 | r = sd_bus_message_read(message, "b", &b); | |
118 | if (r < 0) { | |
119 | log_debug_errno(r, "Failed to parse PrepareForSleep signal: %m"); | |
120 | return 0; | |
121 | } | |
122 | ||
123 | if (b) | |
124 | return 0; | |
125 | ||
126 | log_debug("Coming back from suspend, resetting all connections..."); | |
127 | ||
128 | manager_reset_all(m); | |
129 | ||
130 | return 0; | |
131 | } | |
132 | ||
133 | int manager_connect_bus(Manager *m) { | |
134 | int r; | |
135 | ||
136 | assert(m); | |
137 | ||
138 | r = sd_bus_default_system(&m->bus); | |
139 | if (r == -ENOENT) { | |
140 | /* We failed to connect? Yuck, we must be in early | |
141 | * boot. Let's try in 5s again. As soon as we have | |
142 | * kdbus we can stop doing this... */ | |
143 | ||
144 | log_debug_errno(r, "Failed to connect to bus, trying again in 5s: %m"); | |
145 | ||
146 | r = sd_event_add_time(m->event, &m->bus_retry_event_source, CLOCK_MONOTONIC, now(CLOCK_MONOTONIC) + 5*USEC_PER_SEC, 0, on_bus_retry, m); | |
147 | if (r < 0) | |
148 | return log_error_errno(r, "Failed to install bus reconnect time event: %m"); | |
149 | ||
150 | return 0; | |
7d6884b6 TA |
151 | } |
152 | ||
153 | if (r < 0) | |
9c0a72f9 TG |
154 | return r; |
155 | ||
9c0a72f9 TG |
156 | r = sd_bus_add_match(m->bus, &m->prepare_for_sleep_slot, |
157 | "type='signal'," | |
158 | "sender='org.freedesktop.login1'," | |
159 | "interface='org.freedesktop.login1.Manager'," | |
160 | "member='PrepareForSleep'," | |
161 | "path='/org/freedesktop/login1'", | |
162 | match_prepare_for_sleep, | |
163 | m); | |
164 | if (r < 0) | |
165 | return log_error_errno(r, "Failed to add match for PrepareForSleep: %m"); | |
166 | ||
e331e246 TG |
167 | r = sd_bus_add_object_vtable(m->bus, NULL, "/org/freedesktop/network1", "org.freedesktop.network1.Manager", manager_vtable, m); |
168 | if (r < 0) | |
169 | return log_error_errno(r, "Failed to add manager object vtable: %m"); | |
170 | ||
171 | r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/network1/link", "org.freedesktop.network1.Link", link_vtable, link_object_find, m); | |
172 | if (r < 0) | |
173 | return log_error_errno(r, "Failed to add link object vtable: %m"); | |
174 | ||
175 | r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/network1/link", link_node_enumerator, m); | |
176 | if (r < 0) | |
177 | return log_error_errno(r, "Failed to add link enumerator: %m"); | |
3175fcde TG |
178 | |
179 | r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/network1/network", "org.freedesktop.network1.Network", network_vtable, network_object_find, m); | |
180 | if (r < 0) | |
181 | return log_error_errno(r, "Failed to add network object vtable: %m"); | |
182 | ||
183 | r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/network1/network", network_node_enumerator, m); | |
184 | if (r < 0) | |
185 | return log_error_errno(r, "Failed to add network enumerator: %m"); | |
e331e246 TG |
186 | |
187 | r = sd_bus_request_name(m->bus, "org.freedesktop.network1", 0); | |
188 | if (r < 0) | |
189 | return log_error_errno(r, "Failed to register name: %m"); | |
190 | ||
191 | r = sd_bus_attach_event(m->bus, m->event, 0); | |
192 | if (r < 0) | |
193 | return log_error_errno(r, "Failed to attach bus to event loop: %m"); | |
194 | ||
9c0a72f9 TG |
195 | return 0; |
196 | } | |
197 | ||
5fae368b TG |
198 | static int manager_udev_process_link(Manager *m, struct udev_device *device) { |
199 | Link *link = NULL; | |
200 | int r, ifindex; | |
5544ee85 | 201 | |
5fae368b TG |
202 | assert(m); |
203 | assert(device); | |
5544ee85 | 204 | |
5fae368b TG |
205 | if (!streq_ptr(udev_device_get_action(device), "add")) |
206 | return 0; | |
5544ee85 | 207 | |
5fae368b TG |
208 | ifindex = udev_device_get_ifindex(device); |
209 | if (ifindex <= 0) { | |
2f3cf1f9 | 210 | log_debug("Ignoring udev ADD event for device with invalid ifindex"); |
5fae368b | 211 | return 0; |
5544ee85 TG |
212 | } |
213 | ||
5fae368b TG |
214 | r = link_get(m, ifindex, &link); |
215 | if (r == -ENODEV) | |
216 | return 0; | |
217 | else if (r < 0) | |
f579559b TG |
218 | return r; |
219 | ||
5fae368b | 220 | r = link_initialized(link, device); |
44de0efc LP |
221 | if (r < 0) |
222 | return r; | |
223 | ||
5fae368b TG |
224 | return 0; |
225 | } | |
be660c37 | 226 | |
5fae368b TG |
227 | static int manager_dispatch_link_udev(sd_event_source *source, int fd, uint32_t revents, void *userdata) { |
228 | Manager *m = userdata; | |
229 | struct udev_monitor *monitor = m->udev_monitor; | |
230 | _cleanup_udev_device_unref_ struct udev_device *device = NULL; | |
f579559b | 231 | |
5fae368b TG |
232 | device = udev_monitor_receive_device(monitor); |
233 | if (!device) | |
02b59d57 TG |
234 | return -ENOMEM; |
235 | ||
5fae368b | 236 | manager_udev_process_link(m, device); |
f579559b TG |
237 | return 0; |
238 | } | |
239 | ||
5fae368b TG |
240 | static int manager_connect_udev(Manager *m) { |
241 | int r; | |
f579559b | 242 | |
5fae368b TG |
243 | /* udev does not initialize devices inside containers, |
244 | * so we rely on them being already initialized before | |
245 | * entering the container */ | |
75f86906 | 246 | if (detect_container() > 0) |
5fae368b | 247 | return 0; |
f579559b | 248 | |
5fae368b TG |
249 | m->udev = udev_new(); |
250 | if (!m->udev) | |
251 | return -ENOMEM; | |
02b59d57 | 252 | |
5fae368b TG |
253 | m->udev_monitor = udev_monitor_new_from_netlink(m->udev, "udev"); |
254 | if (!m->udev_monitor) | |
255 | return -ENOMEM; | |
02b59d57 | 256 | |
5fae368b | 257 | r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_monitor, "net", NULL); |
02b59d57 | 258 | if (r < 0) |
5fae368b | 259 | return log_error_errno(r, "Could not add udev monitor filter: %m"); |
02b59d57 | 260 | |
5fae368b TG |
261 | r = udev_monitor_enable_receiving(m->udev_monitor); |
262 | if (r < 0) { | |
263 | log_error("Could not enable udev monitor"); | |
02b59d57 | 264 | return r; |
667fcc6d | 265 | } |
505f8da7 | 266 | |
5fae368b TG |
267 | r = sd_event_add_io(m->event, |
268 | &m->udev_event_source, | |
269 | udev_monitor_get_fd(m->udev_monitor), | |
270 | EPOLLIN, manager_dispatch_link_udev, | |
271 | m); | |
272 | if (r < 0) | |
667fcc6d | 273 | return r; |
505f8da7 | 274 | |
5fae368b | 275 | r = sd_event_source_set_description(m->udev_event_source, "networkd-udev"); |
505f8da7 TG |
276 | if (r < 0) |
277 | return r; | |
11a7f229 | 278 | |
505f8da7 TG |
279 | return 0; |
280 | } | |
f579559b | 281 | |
200a0868 TG |
282 | int manager_rtnl_process_address(sd_netlink *rtnl, sd_netlink_message *message, void *userdata) { |
283 | Manager *m = userdata; | |
284 | Link *link = NULL; | |
285 | uint16_t type; | |
200a0868 | 286 | unsigned char flags; |
054f0db4 TG |
287 | int family; |
288 | unsigned char prefixlen; | |
289 | unsigned char scope; | |
290 | union in_addr_union in_addr; | |
291 | struct ifa_cacheinfo cinfo; | |
292 | Address *address = NULL; | |
200a0868 TG |
293 | char buf[INET6_ADDRSTRLEN], valid_buf[FORMAT_TIMESPAN_MAX]; |
294 | const char *valid_str = NULL; | |
295 | int r, ifindex; | |
296 | ||
297 | assert(rtnl); | |
298 | assert(message); | |
299 | assert(m); | |
300 | ||
301 | if (sd_netlink_message_is_error(message)) { | |
302 | r = sd_netlink_message_get_errno(message); | |
303 | if (r < 0) | |
304 | log_warning_errno(r, "rtnl: failed to receive address: %m"); | |
305 | ||
306 | return 0; | |
307 | } | |
308 | ||
309 | r = sd_netlink_message_get_type(message, &type); | |
310 | if (r < 0) { | |
311 | log_warning_errno(r, "rtnl: could not get message type: %m"); | |
312 | return 0; | |
313 | } else if (type != RTM_NEWADDR && type != RTM_DELADDR) { | |
314 | log_warning("rtnl: received unexpected message type when processing address"); | |
315 | return 0; | |
316 | } | |
317 | ||
318 | r = sd_rtnl_message_addr_get_ifindex(message, &ifindex); | |
319 | if (r < 0) { | |
320 | log_warning_errno(r, "rtnl: could not get ifindex from address: %m"); | |
321 | return 0; | |
322 | } else if (ifindex <= 0) { | |
323 | log_warning("rtnl: received address message with invalid ifindex: %d", ifindex); | |
324 | return 0; | |
325 | } else { | |
326 | r = link_get(m, ifindex, &link); | |
327 | if (r < 0 || !link) { | |
328 | /* when enumerating we might be out of sync, but we will | |
329 | * get the address again, so just ignore it */ | |
330 | if (!m->enumerating) | |
331 | log_warning("rtnl: received address for nonexistent link (%d), ignoring", ifindex); | |
332 | return 0; | |
333 | } | |
334 | } | |
335 | ||
054f0db4 TG |
336 | r = sd_rtnl_message_addr_get_family(message, &family); |
337 | if (r < 0 || !IN_SET(family, AF_INET, AF_INET6)) { | |
200a0868 TG |
338 | log_link_warning(link, "rtnl: received address with invalid family, ignoring."); |
339 | return 0; | |
340 | } | |
341 | ||
054f0db4 | 342 | r = sd_rtnl_message_addr_get_prefixlen(message, &prefixlen); |
200a0868 TG |
343 | if (r < 0) { |
344 | log_link_warning_errno(link, r, "rtnl: received address with invalid prefixlen, ignoring: %m"); | |
345 | return 0; | |
346 | } | |
347 | ||
054f0db4 | 348 | r = sd_rtnl_message_addr_get_scope(message, &scope); |
200a0868 TG |
349 | if (r < 0) { |
350 | log_link_warning_errno(link, r, "rtnl: received address with invalid scope, ignoring: %m"); | |
351 | return 0; | |
352 | } | |
353 | ||
354 | r = sd_rtnl_message_addr_get_flags(message, &flags); | |
355 | if (r < 0) { | |
356 | log_link_warning_errno(link, r, "rtnl: received address with invalid flags, ignoring: %m"); | |
357 | return 0; | |
358 | } | |
200a0868 | 359 | |
054f0db4 | 360 | switch (family) { |
200a0868 | 361 | case AF_INET: |
054f0db4 | 362 | r = sd_netlink_message_read_in_addr(message, IFA_LOCAL, &in_addr.in); |
200a0868 TG |
363 | if (r < 0) { |
364 | log_link_warning_errno(link, r, "rtnl: received address without valid address, ignoring: %m"); | |
365 | return 0; | |
366 | } | |
367 | ||
368 | break; | |
369 | ||
370 | case AF_INET6: | |
054f0db4 | 371 | r = sd_netlink_message_read_in6_addr(message, IFA_ADDRESS, &in_addr.in6); |
200a0868 TG |
372 | if (r < 0) { |
373 | log_link_warning_errno(link, r, "rtnl: received address without valid address, ignoring: %m"); | |
374 | return 0; | |
375 | } | |
376 | ||
377 | break; | |
378 | ||
379 | default: | |
380 | assert_not_reached("invalid address family"); | |
381 | } | |
382 | ||
054f0db4 | 383 | if (!inet_ntop(family, &in_addr, buf, INET6_ADDRSTRLEN)) { |
200a0868 TG |
384 | log_link_warning(link, "Could not print address"); |
385 | return 0; | |
386 | } | |
387 | ||
054f0db4 | 388 | r = sd_netlink_message_read_cache_info(message, IFA_CACHEINFO, &cinfo); |
200a0868 | 389 | if (r >= 0) { |
054f0db4 | 390 | if (cinfo.ifa_valid == CACHE_INFO_INFINITY_LIFE_TIME) |
200a0868 TG |
391 | valid_str = "ever"; |
392 | else | |
393 | valid_str = format_timespan(valid_buf, FORMAT_TIMESPAN_MAX, | |
054f0db4 | 394 | cinfo.ifa_valid * USEC_PER_SEC, |
200a0868 TG |
395 | USEC_PER_SEC); |
396 | } | |
397 | ||
054f0db4 | 398 | address_get(link, family, &in_addr, prefixlen, &address); |
200a0868 TG |
399 | |
400 | switch (type) { | |
401 | case RTM_NEWADDR: | |
36c32f61 | 402 | if (address) |
054f0db4 | 403 | log_link_debug(link, "Updating address: %s/%u (valid for %s)", buf, prefixlen, valid_str); |
36c32f61 | 404 | else { |
adda1ed9 TG |
405 | /* An address appeared that we did not request */ |
406 | r = address_add_foreign(link, family, &in_addr, prefixlen, &address); | |
cf1d700d | 407 | if (r < 0) { |
054f0db4 | 408 | log_link_warning_errno(link, r, "Failed to add address %s/%u: %m", buf, prefixlen); |
cf1d700d TG |
409 | return 0; |
410 | } else | |
054f0db4 | 411 | log_link_debug(link, "Adding address: %s/%u (valid for %s)", buf, prefixlen, valid_str); |
200a0868 TG |
412 | } |
413 | ||
58fda79c | 414 | address_update(address, flags, scope, &cinfo); |
36c32f61 | 415 | |
200a0868 TG |
416 | break; |
417 | ||
418 | case RTM_DELADDR: | |
419 | ||
054f0db4 TG |
420 | if (address) { |
421 | log_link_debug(link, "Removing address: %s/%u (valid for %s)", buf, prefixlen, valid_str); | |
91b5f997 | 422 | address_drop(address); |
200a0868 | 423 | } else |
054f0db4 | 424 | log_link_warning(link, "Removing non-existent address: %s/%u (valid for %s)", buf, prefixlen, valid_str); |
200a0868 TG |
425 | |
426 | break; | |
427 | default: | |
428 | assert_not_reached("Received invalid RTNL message type"); | |
429 | } | |
430 | ||
431 | return 1; | |
432 | } | |
433 | ||
1c4baffc | 434 | static int manager_rtnl_process_link(sd_netlink *rtnl, sd_netlink_message *message, void *userdata) { |
505f8da7 TG |
435 | Manager *m = userdata; |
436 | Link *link = NULL; | |
4d473d5d | 437 | NetDev *netdev = NULL; |
f2236469 | 438 | uint16_t type; |
ca4e095a | 439 | const char *name; |
505f8da7 | 440 | int r, ifindex; |
f579559b | 441 | |
505f8da7 TG |
442 | assert(rtnl); |
443 | assert(message); | |
f579559b TG |
444 | assert(m); |
445 | ||
1c4baffc TG |
446 | if (sd_netlink_message_is_error(message)) { |
447 | r = sd_netlink_message_get_errno(message); | |
45af44d4 | 448 | if (r < 0) |
2f3cf1f9 | 449 | log_warning_errno(r, "rtnl: Could not receive link: %m"); |
45af44d4 TG |
450 | |
451 | return 0; | |
452 | } | |
453 | ||
1c4baffc | 454 | r = sd_netlink_message_get_type(message, &type); |
f2236469 | 455 | if (r < 0) { |
2f3cf1f9 | 456 | log_warning_errno(r, "rtnl: Could not get message type: %m"); |
f2236469 | 457 | return 0; |
cdfee943 | 458 | } else if (type != RTM_NEWLINK && type != RTM_DELLINK) { |
2f3cf1f9 | 459 | log_warning("rtnl: Received unexpected message type when processing link"); |
cdfee943 | 460 | return 0; |
f2236469 TG |
461 | } |
462 | ||
505f8da7 | 463 | r = sd_rtnl_message_link_get_ifindex(message, &ifindex); |
45af44d4 | 464 | if (r < 0) { |
2f3cf1f9 | 465 | log_warning_errno(r, "rtnl: Could not get ifindex from link: %m"); |
45af44d4 TG |
466 | return 0; |
467 | } else if (ifindex <= 0) { | |
468 | log_warning("rtnl: received link message with invalid ifindex: %d", ifindex); | |
505f8da7 | 469 | return 0; |
4d473d5d TG |
470 | } else |
471 | link_get(m, ifindex, &link); | |
f579559b | 472 | |
1c4baffc | 473 | r = sd_netlink_message_read_string(message, IFLA_IFNAME, &name); |
45af44d4 | 474 | if (r < 0) { |
2f3cf1f9 | 475 | log_warning_errno(r, "rtnl: Received link message without ifname: %m"); |
4d473d5d TG |
476 | return 0; |
477 | } else | |
f2236469 | 478 | netdev_get(m, name, &netdev); |
4d473d5d TG |
479 | |
480 | switch (type) { | |
481 | case RTM_NEWLINK: | |
482 | if (!link) { | |
483 | /* link is new, so add it */ | |
484 | r = link_add(m, message, &link); | |
485 | if (r < 0) { | |
2f3cf1f9 | 486 | log_warning_errno(r, "Could not add new link: %m"); |
4d473d5d TG |
487 | return 0; |
488 | } | |
489 | } | |
490 | ||
491 | if (netdev) { | |
492 | /* netdev exists, so make sure the ifindex matches */ | |
505f8da7 TG |
493 | r = netdev_set_ifindex(netdev, message); |
494 | if (r < 0) { | |
2f3cf1f9 | 495 | log_warning_errno(r, "Could not set ifindex on netdev: %m"); |
505f8da7 TG |
496 | return 0; |
497 | } | |
498 | } | |
e1202047 | 499 | |
f2236469 TG |
500 | r = link_update(link, message); |
501 | if (r < 0) | |
502 | return 0; | |
4d473d5d TG |
503 | |
504 | break; | |
505 | ||
506 | case RTM_DELLINK: | |
507 | link_drop(link); | |
508 | netdev_drop(netdev); | |
509 | ||
510 | break; | |
511 | ||
512 | default: | |
513 | assert_not_reached("Received invalid RTNL message type."); | |
f2236469 | 514 | } |
505f8da7 TG |
515 | |
516 | return 1; | |
517 | } | |
518 | ||
5fae368b TG |
519 | static int systemd_netlink_fd(void) { |
520 | int n, fd, rtnl_fd = -EINVAL; | |
521 | ||
522 | n = sd_listen_fds(true); | |
523 | if (n <= 0) | |
524 | return -EINVAL; | |
525 | ||
526 | for (fd = SD_LISTEN_FDS_START; fd < SD_LISTEN_FDS_START + n; fd ++) { | |
527 | if (sd_is_socket(fd, AF_NETLINK, SOCK_RAW, -1) > 0) { | |
528 | if (rtnl_fd >= 0) | |
529 | return -EINVAL; | |
530 | ||
531 | rtnl_fd = fd; | |
532 | } | |
533 | } | |
534 | ||
535 | return rtnl_fd; | |
536 | } | |
537 | ||
538 | static int manager_connect_rtnl(Manager *m) { | |
539 | int fd, r; | |
505f8da7 TG |
540 | |
541 | assert(m); | |
505f8da7 | 542 | |
5fae368b TG |
543 | fd = systemd_netlink_fd(); |
544 | if (fd < 0) | |
1c4baffc | 545 | r = sd_netlink_open(&m->rtnl); |
5fae368b | 546 | else |
1c4baffc | 547 | r = sd_netlink_open_fd(&m->rtnl, fd); |
505f8da7 TG |
548 | if (r < 0) |
549 | return r; | |
550 | ||
1c4baffc | 551 | r = sd_netlink_inc_rcvbuf(m->rtnl, RCVBUF_SIZE); |
f579559b | 552 | if (r < 0) |
bf5332d2 | 553 | return r; |
f579559b | 554 | |
1c4baffc | 555 | r = sd_netlink_attach_event(m->rtnl, m->event, 0); |
505f8da7 TG |
556 | if (r < 0) |
557 | return r; | |
f579559b | 558 | |
1c4baffc | 559 | r = sd_netlink_add_match(m->rtnl, RTM_NEWLINK, &manager_rtnl_process_link, m); |
5fae368b TG |
560 | if (r < 0) |
561 | return r; | |
505f8da7 | 562 | |
1c4baffc | 563 | r = sd_netlink_add_match(m->rtnl, RTM_DELLINK, &manager_rtnl_process_link, m); |
5fae368b TG |
564 | if (r < 0) |
565 | return r; | |
45af44d4 | 566 | |
200a0868 | 567 | r = sd_netlink_add_match(m->rtnl, RTM_NEWADDR, &manager_rtnl_process_address, m); |
5fae368b TG |
568 | if (r < 0) |
569 | return r; | |
570 | ||
200a0868 | 571 | r = sd_netlink_add_match(m->rtnl, RTM_DELADDR, &manager_rtnl_process_address, m); |
5fae368b TG |
572 | if (r < 0) |
573 | return r; | |
574 | ||
575 | return 0; | |
45af44d4 | 576 | } |
505f8da7 | 577 | |
84de38c5 TG |
578 | static int set_put_in_addr(Set *s, const struct in_addr *address) { |
579 | char *p; | |
580 | int r; | |
581 | ||
582 | assert(s); | |
583 | ||
584 | r = in_addr_to_string(AF_INET, (const union in_addr_union*) address, &p); | |
585 | if (r < 0) | |
586 | return r; | |
587 | ||
588 | r = set_consume(s, p); | |
589 | if (r == -EEXIST) | |
590 | return 0; | |
591 | ||
592 | return r; | |
593 | } | |
594 | ||
595 | static int set_put_in_addrv(Set *s, const struct in_addr *addresses, int n) { | |
596 | int r, i, c = 0; | |
597 | ||
598 | assert(s); | |
599 | assert(n <= 0 || addresses); | |
600 | ||
601 | for (i = 0; i < n; i++) { | |
602 | r = set_put_in_addr(s, addresses+i); | |
603 | if (r < 0) | |
604 | return r; | |
605 | ||
606 | c += r; | |
607 | } | |
608 | ||
609 | return c; | |
610 | } | |
611 | ||
612 | static void print_string_set(FILE *f, const char *field, Set *s) { | |
613 | bool space = false; | |
614 | Iterator i; | |
615 | char *p; | |
616 | ||
617 | if (set_isempty(s)) | |
618 | return; | |
619 | ||
620 | fputs(field, f); | |
621 | ||
622 | SET_FOREACH(p, s, i) { | |
623 | if (space) | |
624 | fputc(' ', f); | |
625 | fputs(p, f); | |
626 | space = true; | |
627 | } | |
628 | fputc('\n', f); | |
629 | } | |
630 | ||
631 | static int manager_save(Manager *m) { | |
632 | _cleanup_set_free_free_ Set *dns = NULL, *ntp = NULL, *domains = NULL; | |
633 | Link *link; | |
634 | Iterator i; | |
635 | _cleanup_free_ char *temp_path = NULL; | |
636 | _cleanup_fclose_ FILE *f = NULL; | |
637 | LinkOperationalState operstate = LINK_OPERSTATE_OFF; | |
638 | const char *operstate_str; | |
639 | int r; | |
640 | ||
641 | assert(m); | |
642 | assert(m->state_file); | |
643 | ||
644 | /* We add all NTP and DNS server to a set, to filter out duplicates */ | |
645 | dns = set_new(&string_hash_ops); | |
646 | if (!dns) | |
647 | return -ENOMEM; | |
648 | ||
649 | ntp = set_new(&string_hash_ops); | |
650 | if (!ntp) | |
651 | return -ENOMEM; | |
652 | ||
653 | domains = set_new(&string_hash_ops); | |
654 | if (!domains) | |
655 | return -ENOMEM; | |
656 | ||
657 | HASHMAP_FOREACH(link, m->links, i) { | |
658 | if (link->flags & IFF_LOOPBACK) | |
659 | continue; | |
660 | ||
661 | if (link->operstate > operstate) | |
662 | operstate = link->operstate; | |
663 | ||
664 | if (!link->network) | |
665 | continue; | |
666 | ||
667 | /* First add the static configured entries */ | |
668 | r = set_put_strdupv(dns, link->network->dns); | |
669 | if (r < 0) | |
670 | return r; | |
671 | ||
672 | r = set_put_strdupv(ntp, link->network->ntp); | |
673 | if (r < 0) | |
674 | return r; | |
675 | ||
676 | r = set_put_strdupv(domains, link->network->domains); | |
677 | if (r < 0) | |
678 | return r; | |
679 | ||
680 | if (!link->dhcp_lease) | |
681 | continue; | |
682 | ||
683 | /* Secondly, add the entries acquired via DHCP */ | |
684 | if (link->network->dhcp_dns) { | |
685 | const struct in_addr *addresses; | |
686 | ||
687 | r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses); | |
688 | if (r > 0) { | |
689 | r = set_put_in_addrv(dns, addresses, r); | |
690 | if (r < 0) | |
691 | return r; | |
692 | } else if (r < 0 && r != -ENODATA) | |
693 | return r; | |
694 | } | |
695 | ||
696 | if (link->network->dhcp_ntp) { | |
697 | const struct in_addr *addresses; | |
698 | ||
699 | r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses); | |
700 | if (r > 0) { | |
701 | r = set_put_in_addrv(ntp, addresses, r); | |
702 | if (r < 0) | |
703 | return r; | |
704 | } else if (r < 0 && r != -ENODATA) | |
705 | return r; | |
706 | } | |
707 | ||
708 | if (link->network->dhcp_domains) { | |
709 | const char *domainname; | |
710 | ||
711 | r = sd_dhcp_lease_get_domainname(link->dhcp_lease, &domainname); | |
712 | if (r >= 0) { | |
713 | r = set_put_strdup(domains, domainname); | |
714 | if (r < 0) | |
715 | return r; | |
716 | } else if (r != -ENODATA) | |
717 | return r; | |
718 | } | |
719 | } | |
720 | ||
721 | operstate_str = link_operstate_to_string(operstate); | |
722 | assert(operstate_str); | |
723 | ||
724 | r = fopen_temporary(m->state_file, &f, &temp_path); | |
725 | if (r < 0) | |
726 | return r; | |
727 | ||
728 | fchmod(fileno(f), 0644); | |
729 | ||
730 | fprintf(f, | |
731 | "# This is private data. Do not parse.\n" | |
732 | "OPER_STATE=%s\n", operstate_str); | |
733 | ||
734 | print_string_set(f, "DNS=", dns); | |
735 | print_string_set(f, "NTP=", ntp); | |
736 | print_string_set(f, "DOMAINS=", domains); | |
737 | ||
738 | r = fflush_and_check(f); | |
739 | if (r < 0) | |
740 | goto fail; | |
741 | ||
742 | if (rename(temp_path, m->state_file) < 0) { | |
743 | r = -errno; | |
744 | goto fail; | |
745 | } | |
746 | ||
747 | if (m->operational_state != operstate) { | |
748 | m->operational_state = operstate; | |
749 | r = manager_send_changed(m, "OperationalState", NULL); | |
750 | if (r < 0) | |
751 | log_error_errno(r, "Could not emit changed OperationalState: %m"); | |
752 | } | |
753 | ||
754 | m->dirty = false; | |
755 | ||
756 | return 0; | |
757 | ||
758 | fail: | |
759 | (void) unlink(m->state_file); | |
760 | (void) unlink(temp_path); | |
761 | ||
762 | return log_error_errno(r, "Failed to save network state to %s: %m", m->state_file); | |
763 | } | |
764 | ||
765 | static int manager_dirty_handler(sd_event_source *s, void *userdata) { | |
766 | Manager *m = userdata; | |
767 | Link *link; | |
768 | Iterator i; | |
769 | int r; | |
770 | ||
771 | assert(m); | |
772 | ||
773 | if (m->dirty) | |
774 | manager_save(m); | |
775 | ||
776 | SET_FOREACH(link, m->dirty_links, i) { | |
777 | r = link_save(link); | |
778 | if (r >= 0) | |
779 | link_clean(link); | |
780 | } | |
781 | ||
782 | return 1; | |
783 | } | |
784 | ||
5fae368b TG |
785 | int manager_new(Manager **ret) { |
786 | _cleanup_manager_free_ Manager *m = NULL; | |
45af44d4 | 787 | int r; |
f579559b | 788 | |
5fae368b TG |
789 | m = new0(Manager, 1); |
790 | if (!m) | |
791 | return -ENOMEM; | |
45af44d4 | 792 | |
5fae368b TG |
793 | m->state_file = strdup("/run/systemd/netif/state"); |
794 | if (!m->state_file) | |
795 | return -ENOMEM; | |
796 | ||
797 | r = sd_event_default(&m->event); | |
45af44d4 TG |
798 | if (r < 0) |
799 | return r; | |
800 | ||
5fae368b TG |
801 | sd_event_set_watchdog(m->event, true); |
802 | ||
803 | sd_event_add_signal(m->event, NULL, SIGTERM, NULL, NULL); | |
804 | sd_event_add_signal(m->event, NULL, SIGINT, NULL, NULL); | |
805 | ||
84de38c5 TG |
806 | r = sd_event_add_post(m->event, NULL, manager_dirty_handler, m); |
807 | if (r < 0) | |
808 | return r; | |
809 | ||
5fae368b | 810 | r = manager_connect_rtnl(m); |
45af44d4 TG |
811 | if (r < 0) |
812 | return r; | |
813 | ||
5fae368b TG |
814 | r = manager_connect_udev(m); |
815 | if (r < 0) | |
816 | return r; | |
45af44d4 | 817 | |
5fae368b TG |
818 | m->netdevs = hashmap_new(&string_hash_ops); |
819 | if (!m->netdevs) | |
820 | return -ENOMEM; | |
f579559b | 821 | |
5fae368b | 822 | LIST_HEAD_INIT(m->networks); |
f579559b | 823 | |
5fae368b TG |
824 | r = setup_default_address_pool(m); |
825 | if (r < 0) | |
826 | return r; | |
f579559b | 827 | |
5fae368b TG |
828 | *ret = m; |
829 | m = NULL; | |
f579559b | 830 | |
f579559b TG |
831 | return 0; |
832 | } | |
833 | ||
5fae368b TG |
834 | void manager_free(Manager *m) { |
835 | Network *network; | |
836 | NetDev *netdev; | |
837 | Link *link; | |
838 | AddressPool *pool; | |
f579559b | 839 | |
5fae368b TG |
840 | if (!m) |
841 | return; | |
505f8da7 | 842 | |
5fae368b | 843 | free(m->state_file); |
505f8da7 | 844 | |
5fae368b TG |
845 | while ((link = hashmap_first(m->links))) |
846 | link_unref(link); | |
847 | hashmap_free(m->links); | |
f579559b | 848 | |
5fae368b TG |
849 | while ((network = m->networks)) |
850 | network_free(network); | |
851 | ||
dbffab87 TG |
852 | hashmap_free(m->networks_by_name); |
853 | ||
5fae368b TG |
854 | while ((netdev = hashmap_first(m->netdevs))) |
855 | netdev_unref(netdev); | |
856 | hashmap_free(m->netdevs); | |
857 | ||
858 | while ((pool = m->address_pools)) | |
859 | address_pool_free(pool); | |
860 | ||
1c4baffc | 861 | sd_netlink_unref(m->rtnl); |
2f5b4a77 | 862 | sd_event_unref(m->event); |
5fae368b | 863 | |
7d20d375 TG |
864 | sd_event_source_unref(m->udev_event_source); |
865 | udev_monitor_unref(m->udev_monitor); | |
866 | udev_unref(m->udev); | |
867 | ||
868 | sd_bus_unref(m->bus); | |
869 | sd_bus_slot_unref(m->prepare_for_sleep_slot); | |
870 | sd_event_source_unref(m->bus_retry_event_source); | |
871 | ||
5fae368b TG |
872 | free(m); |
873 | } | |
874 | ||
a97dcc12 TG |
875 | static bool manager_check_idle(void *userdata) { |
876 | Manager *m = userdata; | |
877 | Link *link; | |
878 | Iterator i; | |
879 | ||
880 | assert(m); | |
881 | ||
882 | HASHMAP_FOREACH(link, m->links, i) { | |
883 | /* we are not woken on udev activity, so let's just wait for the | |
884 | * pending udev event */ | |
885 | if (link->state == LINK_STATE_PENDING) | |
886 | return false; | |
887 | ||
888 | if (!link->network) | |
889 | continue; | |
890 | ||
891 | /* we are not woken on netork activity, so let's stay around */ | |
892 | if (link_lldp_enabled(link) || | |
893 | link_ipv4ll_enabled(link) || | |
894 | link_dhcp4_server_enabled(link) || | |
895 | link_dhcp4_enabled(link) || | |
896 | link_dhcp6_enabled(link)) | |
897 | return false; | |
898 | } | |
899 | ||
900 | return true; | |
901 | } | |
902 | ||
903 | int manager_run(Manager *m) { | |
84de38c5 TG |
904 | Link *link; |
905 | Iterator i; | |
906 | ||
a97dcc12 TG |
907 | assert(m); |
908 | ||
84de38c5 TG |
909 | /* The dirty handler will deal with future serialization, but the first one |
910 | must be done explicitly. */ | |
911 | ||
912 | manager_save(m); | |
913 | ||
914 | HASHMAP_FOREACH(link, m->links, i) | |
915 | link_save(link); | |
916 | ||
f806f64c TG |
917 | if (m->bus) |
918 | return bus_event_loop_with_idle( | |
919 | m->event, | |
920 | m->bus, | |
921 | "org.freedesktop.network1", | |
922 | DEFAULT_EXIT_USEC, | |
923 | manager_check_idle, | |
924 | m); | |
925 | else | |
926 | /* failed to connect to the bus, so we lose exit-on-idle logic, | |
927 | this should not happen except if dbus is not around at all */ | |
928 | return sd_event_loop(m->event); | |
a97dcc12 TG |
929 | } |
930 | ||
5fae368b TG |
931 | int manager_load_config(Manager *m) { |
932 | int r; | |
933 | ||
934 | /* update timestamp */ | |
935 | paths_check_timestamp(network_dirs, &m->network_dirs_ts_usec, true); | |
936 | ||
937 | r = netdev_load(m); | |
f579559b TG |
938 | if (r < 0) |
939 | return r; | |
940 | ||
5fae368b | 941 | r = network_load(m); |
9021bb9f TG |
942 | if (r < 0) |
943 | return r; | |
944 | ||
f579559b TG |
945 | return 0; |
946 | } | |
f882c247 | 947 | |
5fae368b TG |
948 | bool manager_should_reload(Manager *m) { |
949 | return paths_check_timestamp(network_dirs, &m->network_dirs_ts_usec, false); | |
950 | } | |
951 | ||
952 | int manager_rtnl_enumerate_links(Manager *m) { | |
1c4baffc TG |
953 | _cleanup_netlink_message_unref_ sd_netlink_message *req = NULL, *reply = NULL; |
954 | sd_netlink_message *link; | |
f882c247 TG |
955 | int r; |
956 | ||
5da8149f | 957 | assert(m); |
5fae368b | 958 | assert(m->rtnl); |
5da8149f | 959 | |
5fae368b | 960 | r = sd_rtnl_message_new_link(m->rtnl, &req, RTM_GETLINK, 0); |
f882c247 TG |
961 | if (r < 0) |
962 | return r; | |
963 | ||
1c4baffc | 964 | r = sd_netlink_message_request_dump(req, true); |
dd3efc09 TG |
965 | if (r < 0) |
966 | return r; | |
967 | ||
1c4baffc | 968 | r = sd_netlink_call(m->rtnl, req, 0, &reply); |
f2236469 TG |
969 | if (r < 0) |
970 | return r; | |
971 | ||
1c4baffc | 972 | for (link = reply; link; link = sd_netlink_message_next(link)) { |
5fae368b | 973 | int k; |
2e9f08ea | 974 | |
6a24f148 TG |
975 | m->enumerating = true; |
976 | ||
5fae368b TG |
977 | k = manager_rtnl_process_link(m->rtnl, link, m); |
978 | if (k < 0) | |
979 | r = k; | |
6a24f148 TG |
980 | |
981 | m->enumerating = false; | |
5fae368b | 982 | } |
2e9f08ea | 983 | |
5fae368b | 984 | return r; |
f882c247 | 985 | } |
3bef724f | 986 | |
5fae368b | 987 | int manager_rtnl_enumerate_addresses(Manager *m) { |
1c4baffc TG |
988 | _cleanup_netlink_message_unref_ sd_netlink_message *req = NULL, *reply = NULL; |
989 | sd_netlink_message *addr; | |
1346b1f0 TG |
990 | int r; |
991 | ||
5fae368b TG |
992 | assert(m); |
993 | assert(m->rtnl); | |
bcbca829 | 994 | |
5fae368b TG |
995 | r = sd_rtnl_message_new_addr(m->rtnl, &req, RTM_GETADDR, 0, 0); |
996 | if (r < 0) | |
997 | return r; | |
bcbca829 | 998 | |
1c4baffc | 999 | r = sd_netlink_message_request_dump(req, true); |
1346b1f0 TG |
1000 | if (r < 0) |
1001 | return r; | |
1002 | ||
1c4baffc | 1003 | r = sd_netlink_call(m->rtnl, req, 0, &reply); |
5fae368b TG |
1004 | if (r < 0) |
1005 | return r; | |
1006 | ||
1c4baffc | 1007 | for (addr = reply; addr; addr = sd_netlink_message_next(addr)) { |
5fae368b TG |
1008 | int k; |
1009 | ||
6a24f148 TG |
1010 | m->enumerating = true; |
1011 | ||
200a0868 | 1012 | k = manager_rtnl_process_address(m->rtnl, addr, m); |
5fae368b TG |
1013 | if (k < 0) |
1014 | r = k; | |
6a24f148 TG |
1015 | |
1016 | m->enumerating = false; | |
5fae368b TG |
1017 | } |
1018 | ||
1019 | return r; | |
1346b1f0 TG |
1020 | } |
1021 | ||
0dd25fb9 | 1022 | int manager_address_pool_acquire(Manager *m, int family, unsigned prefixlen, union in_addr_union *found) { |
11bf3cce LP |
1023 | AddressPool *p; |
1024 | int r; | |
1025 | ||
1026 | assert(m); | |
1027 | assert(prefixlen > 0); | |
1028 | assert(found); | |
1029 | ||
1030 | LIST_FOREACH(address_pools, p, m->address_pools) { | |
1031 | if (p->family != family) | |
1032 | continue; | |
1033 | ||
1034 | r = address_pool_acquire(p, prefixlen, found); | |
1035 | if (r != 0) | |
1036 | return r; | |
1037 | } | |
1038 | ||
1039 | return 0; | |
1040 | } | |
4f5f911e LP |
1041 | |
1042 | Link* manager_find_uplink(Manager *m, Link *exclude) { | |
1043 | _cleanup_free_ struct local_address *gateways = NULL; | |
1044 | int n, i; | |
1045 | ||
1046 | assert(m); | |
1047 | ||
1048 | /* Looks for a suitable "uplink", via black magic: an | |
1049 | * interface that is up and where the default route with the | |
1050 | * highest priority points to. */ | |
1051 | ||
1052 | n = local_gateways(m->rtnl, 0, AF_UNSPEC, &gateways); | |
1053 | if (n < 0) { | |
1054 | log_warning_errno(n, "Failed to determine list of default gateways: %m"); | |
1055 | return NULL; | |
1056 | } | |
1057 | ||
1058 | for (i = 0; i < n; i++) { | |
1059 | Link *link; | |
1060 | ||
1061 | link = hashmap_get(m->links, INT_TO_PTR(gateways[i].ifindex)); | |
1062 | if (!link) { | |
c2c940bd | 1063 | log_debug("Weird, found a gateway for a link we don't know. Ignoring."); |
4f5f911e LP |
1064 | continue; |
1065 | } | |
1066 | ||
1067 | if (link == exclude) | |
1068 | continue; | |
1069 | ||
1070 | if (link->operstate < LINK_OPERSTATE_ROUTABLE) | |
1071 | continue; | |
1072 | ||
1073 | return link; | |
1074 | } | |
1075 | ||
1076 | return NULL; | |
1077 | } | |
84de38c5 TG |
1078 | |
1079 | void manager_dirty(Manager *manager) { | |
1080 | assert(manager); | |
1081 | ||
1082 | /* the serialized state in /run is no longer up-to-date */ | |
1083 | manager->dirty = true; | |
1084 | } |