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1 | /* SPDX-License-Identifier: LGPL-2.1+ */ | |
2 | ||
3 | #include <netinet/in.h> | |
4 | #include <linux/if.h> | |
5 | #include <unistd.h> | |
6 | ||
7 | #include "alloc-util.h" | |
8 | #include "bus-util.h" | |
9 | #include "dhcp-identifier.h" | |
10 | #include "dhcp-lease-internal.h" | |
11 | #include "env-file.h" | |
12 | #include "fd-util.h" | |
13 | #include "fileio.h" | |
14 | #include "missing_network.h" | |
15 | #include "netdev/bond.h" | |
16 | #include "netdev/bridge.h" | |
17 | #include "netdev/ipvlan.h" | |
18 | #include "netdev/vrf.h" | |
19 | #include "netlink-util.h" | |
20 | #include "network-internal.h" | |
21 | #include "networkd-can.h" | |
22 | #include "networkd-ipv6-proxy-ndp.h" | |
23 | #include "networkd-lldp-tx.h" | |
24 | #include "networkd-manager.h" | |
25 | #include "networkd-ndisc.h" | |
26 | #include "networkd-neighbor.h" | |
27 | #include "networkd-radv.h" | |
28 | #include "networkd-routing-policy-rule.h" | |
29 | #include "set.h" | |
30 | #include "socket-util.h" | |
31 | #include "stdio-util.h" | |
32 | #include "string-table.h" | |
33 | #include "strv.h" | |
34 | #include "sysctl-util.h" | |
35 | #include "tmpfile-util.h" | |
36 | #include "udev-util.h" | |
37 | #include "util.h" | |
38 | #include "virt.h" | |
39 | ||
40 | uint32_t link_get_vrf_table(Link *link) { | |
41 | return link->network->vrf ? VRF(link->network->vrf)->table : RT_TABLE_MAIN; | |
42 | } | |
43 | ||
44 | uint32_t link_get_dhcp_route_table(Link *link) { | |
45 | /* When the interface is part of an VRF use the VRFs routing table, unless | |
46 | * another table is explicitly specified. */ | |
47 | if (link->network->dhcp_route_table_set) | |
48 | return link->network->dhcp_route_table; | |
49 | return link_get_vrf_table(link); | |
50 | } | |
51 | ||
52 | uint32_t link_get_ipv6_accept_ra_route_table(Link *link) { | |
53 | if (link->network->ipv6_accept_ra_route_table_set) | |
54 | return link->network->ipv6_accept_ra_route_table; | |
55 | return link_get_vrf_table(link); | |
56 | } | |
57 | ||
58 | DUID* link_get_duid(Link *link) { | |
59 | if (link->network->duid.type != _DUID_TYPE_INVALID) | |
60 | return &link->network->duid; | |
61 | else | |
62 | return &link->manager->duid; | |
63 | } | |
64 | ||
65 | static bool link_dhcp6_enabled(Link *link) { | |
66 | assert(link); | |
67 | ||
68 | if (!socket_ipv6_is_supported()) | |
69 | return false; | |
70 | ||
71 | if (link->flags & IFF_LOOPBACK) | |
72 | return false; | |
73 | ||
74 | if (!link->network) | |
75 | return false; | |
76 | ||
77 | if (link->network->bond) | |
78 | return false; | |
79 | ||
80 | if (STRPTR_IN_SET(link->kind, "can", "vcan", "vxcan")) | |
81 | return false; | |
82 | ||
83 | if (manager_sysctl_ipv6_enabled(link->manager) == 0) | |
84 | return false; | |
85 | ||
86 | return link->network->dhcp & ADDRESS_FAMILY_IPV6; | |
87 | } | |
88 | ||
89 | static bool link_dhcp4_enabled(Link *link) { | |
90 | assert(link); | |
91 | ||
92 | if (link->flags & IFF_LOOPBACK) | |
93 | return false; | |
94 | ||
95 | if (!link->network) | |
96 | return false; | |
97 | ||
98 | if (link->network->bond) | |
99 | return false; | |
100 | ||
101 | if (STRPTR_IN_SET(link->kind, "can", "vcan", "vxcan")) | |
102 | return false; | |
103 | ||
104 | return link->network->dhcp & ADDRESS_FAMILY_IPV4; | |
105 | } | |
106 | ||
107 | static bool link_dhcp4_server_enabled(Link *link) { | |
108 | assert(link); | |
109 | ||
110 | if (link->flags & IFF_LOOPBACK) | |
111 | return false; | |
112 | ||
113 | if (!link->network) | |
114 | return false; | |
115 | ||
116 | if (link->network->bond) | |
117 | return false; | |
118 | ||
119 | if (STRPTR_IN_SET(link->kind, "can", "vcan", "vxcan")) | |
120 | return false; | |
121 | ||
122 | return link->network->dhcp_server; | |
123 | } | |
124 | ||
125 | bool link_ipv4ll_enabled(Link *link, AddressFamilyBoolean mask) { | |
126 | assert(link); | |
127 | assert((mask & ~(ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) == 0); | |
128 | ||
129 | if (link->flags & IFF_LOOPBACK) | |
130 | return false; | |
131 | ||
132 | if (!link->network) | |
133 | return false; | |
134 | ||
135 | if (STRPTR_IN_SET(link->kind, "vrf", "wireguard", "ipip", "gre", "ip6gre", "ip6tnl", "sit", "vti", "vti6", "can", "vcan", "vxcan", "nlmon")) | |
136 | return false; | |
137 | ||
138 | /* L3 or L3S mode do not support ARP. */ | |
139 | if (IN_SET(link_get_ipvlan_mode(link), NETDEV_IPVLAN_MODE_L3, NETDEV_IPVLAN_MODE_L3S)) | |
140 | return false; | |
141 | ||
142 | if (link->network->bond) | |
143 | return false; | |
144 | ||
145 | if (link->network->bond) | |
146 | return false; | |
147 | ||
148 | return link->network->link_local & mask; | |
149 | } | |
150 | ||
151 | static bool link_ipv6ll_enabled(Link *link) { | |
152 | assert(link); | |
153 | ||
154 | if (!socket_ipv6_is_supported()) | |
155 | return false; | |
156 | ||
157 | if (link->flags & IFF_LOOPBACK) | |
158 | return false; | |
159 | ||
160 | if (!link->network) | |
161 | return false; | |
162 | ||
163 | if (STRPTR_IN_SET(link->kind, "vrf", "wireguard", "ipip", "gre", "sit", "vti", "can", "vcan", "vxcan", "nlmon")) | |
164 | return false; | |
165 | ||
166 | if (link->network->bond) | |
167 | return false; | |
168 | ||
169 | if (manager_sysctl_ipv6_enabled(link->manager) == 0) | |
170 | return false; | |
171 | ||
172 | return link->network->link_local & ADDRESS_FAMILY_IPV6; | |
173 | } | |
174 | ||
175 | static bool link_ipv6_enabled(Link *link) { | |
176 | assert(link); | |
177 | ||
178 | if (!socket_ipv6_is_supported()) | |
179 | return false; | |
180 | ||
181 | if (link->network->bond) | |
182 | return false; | |
183 | ||
184 | if (manager_sysctl_ipv6_enabled(link->manager) == 0) | |
185 | return false; | |
186 | ||
187 | if (STRPTR_IN_SET(link->kind, "can", "vcan", "vxcan")) | |
188 | return false; | |
189 | ||
190 | /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */ | |
191 | return link_ipv6ll_enabled(link) || network_has_static_ipv6_addresses(link->network); | |
192 | } | |
193 | ||
194 | static bool link_radv_enabled(Link *link) { | |
195 | assert(link); | |
196 | ||
197 | if (!link_ipv6ll_enabled(link)) | |
198 | return false; | |
199 | ||
200 | return link->network->router_prefix_delegation != RADV_PREFIX_DELEGATION_NONE; | |
201 | } | |
202 | ||
203 | static bool link_ipv4_forward_enabled(Link *link) { | |
204 | assert(link); | |
205 | ||
206 | if (link->flags & IFF_LOOPBACK) | |
207 | return false; | |
208 | ||
209 | if (!link->network) | |
210 | return false; | |
211 | ||
212 | if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID) | |
213 | return false; | |
214 | ||
215 | return link->network->ip_forward & ADDRESS_FAMILY_IPV4; | |
216 | } | |
217 | ||
218 | static bool link_ipv6_forward_enabled(Link *link) { | |
219 | assert(link); | |
220 | ||
221 | if (!socket_ipv6_is_supported()) | |
222 | return false; | |
223 | ||
224 | if (link->flags & IFF_LOOPBACK) | |
225 | return false; | |
226 | ||
227 | if (!link->network) | |
228 | return false; | |
229 | ||
230 | if (link->network->ip_forward == _ADDRESS_FAMILY_BOOLEAN_INVALID) | |
231 | return false; | |
232 | ||
233 | if (manager_sysctl_ipv6_enabled(link->manager) == 0) | |
234 | return false; | |
235 | ||
236 | return link->network->ip_forward & ADDRESS_FAMILY_IPV6; | |
237 | } | |
238 | ||
239 | static bool link_proxy_arp_enabled(Link *link) { | |
240 | assert(link); | |
241 | ||
242 | if (link->flags & IFF_LOOPBACK) | |
243 | return false; | |
244 | ||
245 | if (!link->network) | |
246 | return false; | |
247 | ||
248 | if (link->network->proxy_arp < 0) | |
249 | return false; | |
250 | ||
251 | return true; | |
252 | } | |
253 | ||
254 | static bool link_ipv6_accept_ra_enabled(Link *link) { | |
255 | assert(link); | |
256 | ||
257 | if (!socket_ipv6_is_supported()) | |
258 | return false; | |
259 | ||
260 | if (link->flags & IFF_LOOPBACK) | |
261 | return false; | |
262 | ||
263 | if (!link->network) | |
264 | return false; | |
265 | ||
266 | if (!link_ipv6ll_enabled(link)) | |
267 | return false; | |
268 | ||
269 | /* If unset use system default (enabled if local forwarding is disabled. | |
270 | * disabled if local forwarding is enabled). | |
271 | * If set, ignore or enforce RA independent of local forwarding state. | |
272 | */ | |
273 | if (link->network->ipv6_accept_ra < 0) | |
274 | /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */ | |
275 | return !link_ipv6_forward_enabled(link); | |
276 | else if (link->network->ipv6_accept_ra > 0) | |
277 | /* accept RA even if ip_forward is enabled */ | |
278 | return true; | |
279 | else | |
280 | /* ignore RA */ | |
281 | return false; | |
282 | } | |
283 | ||
284 | static IPv6PrivacyExtensions link_ipv6_privacy_extensions(Link *link) { | |
285 | assert(link); | |
286 | ||
287 | if (!socket_ipv6_is_supported()) | |
288 | return _IPV6_PRIVACY_EXTENSIONS_INVALID; | |
289 | ||
290 | if (link->flags & IFF_LOOPBACK) | |
291 | return _IPV6_PRIVACY_EXTENSIONS_INVALID; | |
292 | ||
293 | if (!link->network) | |
294 | return _IPV6_PRIVACY_EXTENSIONS_INVALID; | |
295 | ||
296 | return link->network->ipv6_privacy_extensions; | |
297 | } | |
298 | ||
299 | static int link_enable_ipv6(Link *link) { | |
300 | bool disabled; | |
301 | int r; | |
302 | ||
303 | if (link->flags & IFF_LOOPBACK) | |
304 | return 0; | |
305 | ||
306 | disabled = !link_ipv6_enabled(link); | |
307 | ||
308 | r = sysctl_write_ip_property_boolean(AF_INET6, link->ifname, "disable_ipv6", disabled); | |
309 | if (r < 0) | |
310 | log_link_warning_errno(link, r, "Cannot %s IPv6: %m", enable_disable(!disabled)); | |
311 | else | |
312 | log_link_info(link, "IPv6 successfully %sd", enable_disable(!disabled)); | |
313 | ||
314 | return 0; | |
315 | } | |
316 | ||
317 | static bool link_is_enslaved(Link *link) { | |
318 | if (link->flags & IFF_SLAVE) | |
319 | /* Even if the link is not managed by networkd, honor IFF_SLAVE flag. */ | |
320 | return true; | |
321 | ||
322 | if (!link->network) | |
323 | return false; | |
324 | ||
325 | if (link->master_ifindex > 0 && link->network->bridge) | |
326 | return true; | |
327 | ||
328 | /* TODO: add conditions for other netdevs. */ | |
329 | ||
330 | return false; | |
331 | } | |
332 | ||
333 | static void link_update_master_operstate(Link *link, NetDev *netdev) { | |
334 | Link *master; | |
335 | ||
336 | if (!netdev) | |
337 | return; | |
338 | ||
339 | if (link_get(link->manager, netdev->ifindex, &master) < 0) | |
340 | return; | |
341 | ||
342 | link_update_operstate(master, true); | |
343 | } | |
344 | ||
345 | void link_update_operstate(Link *link, bool also_update_master) { | |
346 | LinkOperationalState operstate; | |
347 | Iterator i; | |
348 | ||
349 | assert(link); | |
350 | ||
351 | if (link->kernel_operstate == IF_OPER_DORMANT) | |
352 | operstate = LINK_OPERSTATE_DORMANT; | |
353 | else if (link_has_carrier(link)) { | |
354 | Address *address; | |
355 | uint8_t scope = RT_SCOPE_NOWHERE; | |
356 | ||
357 | /* if we have carrier, check what addresses we have */ | |
358 | SET_FOREACH(address, link->addresses, i) { | |
359 | if (!address_is_ready(address)) | |
360 | continue; | |
361 | ||
362 | if (address->scope < scope) | |
363 | scope = address->scope; | |
364 | } | |
365 | ||
366 | /* for operstate we also take foreign addresses into account */ | |
367 | SET_FOREACH(address, link->addresses_foreign, i) { | |
368 | if (!address_is_ready(address)) | |
369 | continue; | |
370 | ||
371 | if (address->scope < scope) | |
372 | scope = address->scope; | |
373 | } | |
374 | ||
375 | if (scope < RT_SCOPE_SITE) | |
376 | /* universally accessible addresses found */ | |
377 | operstate = LINK_OPERSTATE_ROUTABLE; | |
378 | else if (scope < RT_SCOPE_HOST) | |
379 | /* only link or site local addresses found */ | |
380 | operstate = LINK_OPERSTATE_DEGRADED; | |
381 | else | |
382 | /* no useful addresses found */ | |
383 | operstate = LINK_OPERSTATE_CARRIER; | |
384 | } else if (link->flags & IFF_UP) | |
385 | operstate = LINK_OPERSTATE_NO_CARRIER; | |
386 | else | |
387 | operstate = LINK_OPERSTATE_OFF; | |
388 | ||
389 | if (IN_SET(operstate, LINK_OPERSTATE_DEGRADED, LINK_OPERSTATE_CARRIER) && | |
390 | link_is_enslaved(link)) | |
391 | operstate = LINK_OPERSTATE_ENSLAVED; | |
392 | ||
393 | if (operstate >= LINK_OPERSTATE_CARRIER) { | |
394 | Link *slave; | |
395 | ||
396 | SET_FOREACH(slave, link->slaves, i) { | |
397 | link_update_operstate(slave, false); | |
398 | ||
399 | if (slave->operstate < LINK_OPERSTATE_CARRIER) | |
400 | operstate = LINK_OPERSTATE_DEGRADED_CARRIER; | |
401 | } | |
402 | } | |
403 | ||
404 | if (link->operstate != operstate) { | |
405 | link->operstate = operstate; | |
406 | link_send_changed(link, "OperationalState", NULL); | |
407 | link_dirty(link); | |
408 | } | |
409 | ||
410 | if (also_update_master && link->network) { | |
411 | link_update_master_operstate(link, link->network->bond); | |
412 | link_update_master_operstate(link, link->network->bridge); | |
413 | } | |
414 | } | |
415 | ||
416 | #define FLAG_STRING(string, flag, old, new) \ | |
417 | (((old ^ new) & flag) \ | |
418 | ? ((old & flag) ? (" -" string) : (" +" string)) \ | |
419 | : "") | |
420 | ||
421 | static int link_update_flags(Link *link, sd_netlink_message *m, bool force_update_operstate) { | |
422 | unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags; | |
423 | uint8_t operstate; | |
424 | int r; | |
425 | ||
426 | assert(link); | |
427 | ||
428 | r = sd_rtnl_message_link_get_flags(m, &flags); | |
429 | if (r < 0) | |
430 | return log_link_warning_errno(link, r, "Could not get link flags: %m"); | |
431 | ||
432 | r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate); | |
433 | if (r < 0) | |
434 | /* if we got a message without operstate, take it to mean | |
435 | the state was unchanged */ | |
436 | operstate = link->kernel_operstate; | |
437 | ||
438 | if (!force_update_operstate && (link->flags == flags) && (link->kernel_operstate == operstate)) | |
439 | return 0; | |
440 | ||
441 | if (link->flags != flags) { | |
442 | 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", | |
443 | FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags), | |
444 | FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags), | |
445 | FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags), | |
446 | FLAG_STRING("UP", IFF_UP, link->flags, flags), | |
447 | FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags), | |
448 | FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags), | |
449 | FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags), | |
450 | FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags), | |
451 | FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags), | |
452 | FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags), | |
453 | FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags), | |
454 | FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags), | |
455 | FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags), | |
456 | FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags), | |
457 | FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags), | |
458 | FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags), | |
459 | FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags), | |
460 | FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags), | |
461 | FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags)); | |
462 | ||
463 | unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP | | |
464 | IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING | | |
465 | IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT | | |
466 | IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL | | |
467 | IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP | | |
468 | IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO); | |
469 | unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags); | |
470 | unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags); | |
471 | ||
472 | /* link flags are currently at most 18 bits, let's align to | |
473 | * printing 20 */ | |
474 | if (unknown_flags_added) | |
475 | log_link_debug(link, | |
476 | "Unknown link flags gained: %#.5x (ignoring)", | |
477 | unknown_flags_added); | |
478 | ||
479 | if (unknown_flags_removed) | |
480 | log_link_debug(link, | |
481 | "Unknown link flags lost: %#.5x (ignoring)", | |
482 | unknown_flags_removed); | |
483 | } | |
484 | ||
485 | link->flags = flags; | |
486 | link->kernel_operstate = operstate; | |
487 | ||
488 | link_update_operstate(link, true); | |
489 | ||
490 | return 0; | |
491 | } | |
492 | ||
493 | static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) { | |
494 | _cleanup_(link_unrefp) Link *link = NULL; | |
495 | uint16_t type; | |
496 | const char *ifname, *kind = NULL; | |
497 | int r, ifindex; | |
498 | unsigned short iftype; | |
499 | ||
500 | assert(manager); | |
501 | assert(message); | |
502 | assert(ret); | |
503 | ||
504 | /* check for link kind */ | |
505 | r = sd_netlink_message_enter_container(message, IFLA_LINKINFO); | |
506 | if (r == 0) { | |
507 | (void) sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind); | |
508 | r = sd_netlink_message_exit_container(message); | |
509 | if (r < 0) | |
510 | return r; | |
511 | } | |
512 | ||
513 | r = sd_netlink_message_get_type(message, &type); | |
514 | if (r < 0) | |
515 | return r; | |
516 | else if (type != RTM_NEWLINK) | |
517 | return -EINVAL; | |
518 | ||
519 | r = sd_rtnl_message_link_get_ifindex(message, &ifindex); | |
520 | if (r < 0) | |
521 | return r; | |
522 | else if (ifindex <= 0) | |
523 | return -EINVAL; | |
524 | ||
525 | r = sd_rtnl_message_link_get_type(message, &iftype); | |
526 | if (r < 0) | |
527 | return r; | |
528 | ||
529 | r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname); | |
530 | if (r < 0) | |
531 | return r; | |
532 | ||
533 | link = new(Link, 1); | |
534 | if (!link) | |
535 | return -ENOMEM; | |
536 | ||
537 | *link = (Link) { | |
538 | .n_ref = 1, | |
539 | .manager = manager, | |
540 | .state = LINK_STATE_PENDING, | |
541 | .rtnl_extended_attrs = true, | |
542 | .ifindex = ifindex, | |
543 | .iftype = iftype, | |
544 | }; | |
545 | ||
546 | link->ifname = strdup(ifname); | |
547 | if (!link->ifname) | |
548 | return -ENOMEM; | |
549 | ||
550 | if (kind) { | |
551 | link->kind = strdup(kind); | |
552 | if (!link->kind) | |
553 | return -ENOMEM; | |
554 | } | |
555 | ||
556 | r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t *)&link->master_ifindex); | |
557 | if (r < 0) | |
558 | log_link_debug_errno(link, r, "New device has no master, continuing without"); | |
559 | ||
560 | r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac); | |
561 | if (r < 0) | |
562 | log_link_debug_errno(link, r, "MAC address not found for new device, continuing without"); | |
563 | ||
564 | if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0) | |
565 | return -ENOMEM; | |
566 | ||
567 | if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0) | |
568 | return -ENOMEM; | |
569 | ||
570 | if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0) | |
571 | return -ENOMEM; | |
572 | ||
573 | r = hashmap_ensure_allocated(&manager->links, NULL); | |
574 | if (r < 0) | |
575 | return r; | |
576 | ||
577 | r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link); | |
578 | if (r < 0) | |
579 | return r; | |
580 | ||
581 | r = link_update_flags(link, message, false); | |
582 | if (r < 0) | |
583 | return r; | |
584 | ||
585 | *ret = TAKE_PTR(link); | |
586 | ||
587 | return 0; | |
588 | } | |
589 | ||
590 | static Link *link_free(Link *link) { | |
591 | Address *address; | |
592 | ||
593 | assert(link); | |
594 | ||
595 | link->routes = set_free_with_destructor(link->routes, route_free); | |
596 | link->routes_foreign = set_free_with_destructor(link->routes_foreign, route_free); | |
597 | ||
598 | link->addresses = set_free_with_destructor(link->addresses, address_free); | |
599 | link->addresses_foreign = set_free_with_destructor(link->addresses_foreign, address_free); | |
600 | ||
601 | while ((address = link->pool_addresses)) { | |
602 | LIST_REMOVE(addresses, link->pool_addresses, address); | |
603 | address_free(address); | |
604 | } | |
605 | ||
606 | sd_dhcp_server_unref(link->dhcp_server); | |
607 | sd_dhcp_client_unref(link->dhcp_client); | |
608 | sd_dhcp_lease_unref(link->dhcp_lease); | |
609 | ||
610 | link_lldp_emit_stop(link); | |
611 | ||
612 | free(link->lease_file); | |
613 | ||
614 | sd_lldp_unref(link->lldp); | |
615 | free(link->lldp_file); | |
616 | ||
617 | ndisc_flush(link); | |
618 | ||
619 | sd_ipv4ll_unref(link->ipv4ll); | |
620 | sd_dhcp6_client_unref(link->dhcp6_client); | |
621 | sd_ndisc_unref(link->ndisc); | |
622 | sd_radv_unref(link->radv); | |
623 | ||
624 | free(link->ifname); | |
625 | free(link->kind); | |
626 | ||
627 | (void) unlink(link->state_file); | |
628 | free(link->state_file); | |
629 | ||
630 | sd_device_unref(link->sd_device); | |
631 | ||
632 | hashmap_free(link->bound_to_links); | |
633 | hashmap_free(link->bound_by_links); | |
634 | ||
635 | set_free_with_destructor(link->slaves, link_unref); | |
636 | ||
637 | network_unref(link->network); | |
638 | ||
639 | return mfree(link); | |
640 | } | |
641 | ||
642 | DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free); | |
643 | ||
644 | int link_get(Manager *m, int ifindex, Link **ret) { | |
645 | Link *link; | |
646 | ||
647 | assert(m); | |
648 | assert(ifindex); | |
649 | assert(ret); | |
650 | ||
651 | link = hashmap_get(m->links, INT_TO_PTR(ifindex)); | |
652 | if (!link) | |
653 | return -ENODEV; | |
654 | ||
655 | *ret = link; | |
656 | ||
657 | return 0; | |
658 | } | |
659 | ||
660 | void link_set_state(Link *link, LinkState state) { | |
661 | assert(link); | |
662 | ||
663 | if (link->state == state) | |
664 | return; | |
665 | ||
666 | log_link_debug(link, "State changed: %s -> %s", | |
667 | link_state_to_string(link->state), | |
668 | link_state_to_string(state)); | |
669 | ||
670 | link->state = state; | |
671 | ||
672 | link_send_changed(link, "AdministrativeState", NULL); | |
673 | } | |
674 | ||
675 | static void link_enter_unmanaged(Link *link) { | |
676 | assert(link); | |
677 | ||
678 | link_set_state(link, LINK_STATE_UNMANAGED); | |
679 | ||
680 | link_dirty(link); | |
681 | } | |
682 | ||
683 | int link_stop_clients(Link *link, bool may_keep_dhcp) { | |
684 | int r = 0, k; | |
685 | ||
686 | assert(link); | |
687 | assert(link->manager); | |
688 | assert(link->manager->event); | |
689 | ||
690 | dhcp4_release_old_lease(link); | |
691 | ||
692 | if (link->dhcp_client && (!may_keep_dhcp || !link->network || | |
693 | !FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP_ON_STOP))) { | |
694 | k = sd_dhcp_client_stop(link->dhcp_client); | |
695 | if (k < 0) | |
696 | r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m"); | |
697 | } | |
698 | ||
699 | if (link->ipv4ll) { | |
700 | k = sd_ipv4ll_stop(link->ipv4ll); | |
701 | if (k < 0) | |
702 | r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m"); | |
703 | } | |
704 | ||
705 | if (link->dhcp6_client) { | |
706 | k = sd_dhcp6_client_stop(link->dhcp6_client); | |
707 | if (k < 0) | |
708 | r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m"); | |
709 | } | |
710 | ||
711 | if (link->ndisc) { | |
712 | k = sd_ndisc_stop(link->ndisc); | |
713 | if (k < 0) | |
714 | r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m"); | |
715 | } | |
716 | ||
717 | if (link->radv) { | |
718 | k = sd_radv_stop(link->radv); | |
719 | if (k < 0) | |
720 | r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m"); | |
721 | } | |
722 | ||
723 | link_lldp_emit_stop(link); | |
724 | return r; | |
725 | } | |
726 | ||
727 | void link_enter_failed(Link *link) { | |
728 | assert(link); | |
729 | ||
730 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) | |
731 | return; | |
732 | ||
733 | log_link_warning(link, "Failed"); | |
734 | ||
735 | link_set_state(link, LINK_STATE_FAILED); | |
736 | ||
737 | link_stop_clients(link, false); | |
738 | ||
739 | link_dirty(link); | |
740 | } | |
741 | ||
742 | static Address* link_find_dhcp_server_address(Link *link) { | |
743 | Address *address; | |
744 | ||
745 | assert(link); | |
746 | assert(link->network); | |
747 | ||
748 | /* The first statically configured address if there is any */ | |
749 | LIST_FOREACH(addresses, address, link->network->static_addresses) { | |
750 | ||
751 | if (address->family != AF_INET) | |
752 | continue; | |
753 | ||
754 | if (in_addr_is_null(address->family, &address->in_addr)) | |
755 | continue; | |
756 | ||
757 | return address; | |
758 | } | |
759 | ||
760 | /* If that didn't work, find a suitable address we got from the pool */ | |
761 | LIST_FOREACH(addresses, address, link->pool_addresses) { | |
762 | if (address->family != AF_INET) | |
763 | continue; | |
764 | ||
765 | return address; | |
766 | } | |
767 | ||
768 | return NULL; | |
769 | } | |
770 | ||
771 | static int link_join_netdevs_after_configured(Link *link) { | |
772 | NetDev *netdev; | |
773 | Iterator i; | |
774 | int r; | |
775 | ||
776 | HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) { | |
777 | if (netdev->ifindex > 0) | |
778 | /* Assume already enslaved. */ | |
779 | continue; | |
780 | ||
781 | if (netdev_get_create_type(netdev) != NETDEV_CREATE_AFTER_CONFIGURED) | |
782 | continue; | |
783 | ||
784 | log_struct(LOG_DEBUG, | |
785 | LOG_LINK_INTERFACE(link), | |
786 | LOG_NETDEV_INTERFACE(netdev), | |
787 | LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname)); | |
788 | ||
789 | r = netdev_join(netdev, link, NULL); | |
790 | if (r < 0) | |
791 | return log_struct_errno(LOG_WARNING, r, | |
792 | LOG_LINK_INTERFACE(link), | |
793 | LOG_NETDEV_INTERFACE(netdev), | |
794 | LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname)); | |
795 | } | |
796 | ||
797 | return 0; | |
798 | } | |
799 | ||
800 | static void link_enter_configured(Link *link) { | |
801 | assert(link); | |
802 | assert(link->network); | |
803 | ||
804 | if (link->state != LINK_STATE_CONFIGURING) | |
805 | return; | |
806 | ||
807 | log_link_info(link, "Configured"); | |
808 | ||
809 | link_set_state(link, LINK_STATE_CONFIGURED); | |
810 | ||
811 | (void) link_join_netdevs_after_configured(link); | |
812 | ||
813 | link_dirty(link); | |
814 | } | |
815 | ||
816 | static int link_request_set_routing_policy_rule(Link *link) { | |
817 | RoutingPolicyRule *rule, *rrule = NULL; | |
818 | int r; | |
819 | ||
820 | assert(link); | |
821 | assert(link->network); | |
822 | ||
823 | link_set_state(link, LINK_STATE_CONFIGURING); | |
824 | link->routing_policy_rules_configured = false; | |
825 | ||
826 | LIST_FOREACH(rules, rule, link->network->rules) { | |
827 | r = routing_policy_rule_get(link->manager, rule->family, &rule->from, rule->from_prefixlen, &rule->to, | |
828 | rule->to_prefixlen, rule->tos, rule->fwmark, rule->table, rule->iif, rule->oif, | |
829 | rule->protocol, &rule->sport, &rule->dport, &rrule); | |
830 | if (r == 0) { | |
831 | (void) routing_policy_rule_make_local(link->manager, rrule); | |
832 | continue; | |
833 | } | |
834 | ||
835 | r = routing_policy_rule_configure(rule, link, NULL); | |
836 | if (r < 0) { | |
837 | log_link_warning_errno(link, r, "Could not set routing policy rules: %m"); | |
838 | link_enter_failed(link); | |
839 | return r; | |
840 | } | |
841 | if (r > 0) | |
842 | link->routing_policy_rule_messages++; | |
843 | } | |
844 | ||
845 | routing_policy_rule_purge(link->manager, link); | |
846 | if (link->routing_policy_rule_messages == 0) { | |
847 | link->routing_policy_rules_configured = true; | |
848 | link_check_ready(link); | |
849 | } else | |
850 | log_link_debug(link, "Setting routing policy rules"); | |
851 | ||
852 | return 0; | |
853 | } | |
854 | ||
855 | static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { | |
856 | int r; | |
857 | ||
858 | assert(link); | |
859 | assert(link->route_messages > 0); | |
860 | assert(IN_SET(link->state, LINK_STATE_CONFIGURING, | |
861 | LINK_STATE_FAILED, LINK_STATE_LINGER)); | |
862 | ||
863 | link->route_messages--; | |
864 | ||
865 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) | |
866 | return 1; | |
867 | ||
868 | r = sd_netlink_message_get_errno(m); | |
869 | if (r < 0 && r != -EEXIST) | |
870 | log_link_warning_errno(link, r, "Could not set route: %m"); | |
871 | ||
872 | if (link->route_messages == 0) { | |
873 | log_link_debug(link, "Routes set"); | |
874 | link->static_routes_configured = true; | |
875 | link_check_ready(link); | |
876 | } | |
877 | ||
878 | return 1; | |
879 | } | |
880 | ||
881 | int link_request_set_routes(Link *link) { | |
882 | enum { | |
883 | PHASE_NON_GATEWAY, /* First phase: Routes without a gateway */ | |
884 | PHASE_GATEWAY, /* Second phase: Routes with a gateway */ | |
885 | _PHASE_MAX | |
886 | } phase; | |
887 | Route *rt; | |
888 | int r; | |
889 | ||
890 | assert(link); | |
891 | assert(link->network); | |
892 | assert(link->addresses_configured); | |
893 | assert(link->address_messages == 0); | |
894 | assert(link->state != _LINK_STATE_INVALID); | |
895 | ||
896 | link_set_state(link, LINK_STATE_CONFIGURING); | |
897 | link->static_routes_configured = false; | |
898 | ||
899 | r = link_request_set_routing_policy_rule(link); | |
900 | if (r < 0) | |
901 | return r; | |
902 | ||
903 | /* First add the routes that enable us to talk to gateways, then add in the others that need a gateway. */ | |
904 | for (phase = 0; phase < _PHASE_MAX; phase++) | |
905 | LIST_FOREACH(routes, rt, link->network->static_routes) { | |
906 | ||
907 | if (in_addr_is_null(rt->family, &rt->gw) != (phase == PHASE_NON_GATEWAY)) | |
908 | continue; | |
909 | ||
910 | r = route_configure(rt, link, route_handler); | |
911 | if (r < 0) { | |
912 | log_link_warning_errno(link, r, "Could not set routes: %m"); | |
913 | link_enter_failed(link); | |
914 | return r; | |
915 | } | |
916 | if (r > 0) | |
917 | link->route_messages++; | |
918 | } | |
919 | ||
920 | if (link->route_messages == 0) { | |
921 | link->static_routes_configured = true; | |
922 | link_check_ready(link); | |
923 | } else | |
924 | log_link_debug(link, "Setting routes"); | |
925 | ||
926 | return 0; | |
927 | } | |
928 | ||
929 | void link_check_ready(Link *link) { | |
930 | Address *a; | |
931 | Iterator i; | |
932 | ||
933 | assert(link); | |
934 | ||
935 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) | |
936 | return; | |
937 | ||
938 | if (!link->network) | |
939 | return; | |
940 | ||
941 | if (!link->addresses_configured) | |
942 | return; | |
943 | ||
944 | if (!link->neighbors_configured) | |
945 | return; | |
946 | ||
947 | SET_FOREACH(a, link->addresses, i) | |
948 | if (!address_is_ready(a)) | |
949 | return; | |
950 | ||
951 | if (!link->addresses_ready) { | |
952 | link->addresses_ready = true; | |
953 | link_request_set_routes(link); | |
954 | return; | |
955 | } | |
956 | ||
957 | if (!link->static_routes_configured) | |
958 | return; | |
959 | ||
960 | if (!link->routing_policy_rules_configured) | |
961 | return; | |
962 | ||
963 | if (link_has_carrier(link) || !link->network->configure_without_carrier) { | |
964 | ||
965 | if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4) && !(link->ipv4ll_address && link->ipv4ll_route)) | |
966 | return; | |
967 | ||
968 | if (link_ipv6ll_enabled(link) && | |
969 | in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) | |
970 | return; | |
971 | ||
972 | if ((link_dhcp4_enabled(link) || link_dhcp6_enabled(link)) && | |
973 | !link->dhcp4_configured && | |
974 | !link->dhcp6_configured && | |
975 | !(link_ipv4ll_enabled(link, ADDRESS_FAMILY_FALLBACK_IPV4) && link->ipv4ll_address && link->ipv4ll_route)) | |
976 | /* When DHCP is enabled, at least one protocol must provide an address, or | |
977 | * an IPv4ll fallback address must be configured. */ | |
978 | return; | |
979 | ||
980 | if (link_ipv6_accept_ra_enabled(link) && !link->ndisc_configured) | |
981 | return; | |
982 | } | |
983 | ||
984 | if (link->state != LINK_STATE_CONFIGURED) | |
985 | link_enter_configured(link); | |
986 | ||
987 | return; | |
988 | } | |
989 | ||
990 | static int link_request_set_neighbors(Link *link) { | |
991 | Neighbor *neighbor; | |
992 | int r; | |
993 | ||
994 | assert(link); | |
995 | assert(link->network); | |
996 | assert(link->state != _LINK_STATE_INVALID); | |
997 | ||
998 | link_set_state(link, LINK_STATE_CONFIGURING); | |
999 | link->neighbors_configured = false; | |
1000 | ||
1001 | LIST_FOREACH(neighbors, neighbor, link->network->neighbors) { | |
1002 | r = neighbor_configure(neighbor, link, NULL); | |
1003 | if (r < 0) { | |
1004 | log_link_warning_errno(link, r, "Could not set neighbor: %m"); | |
1005 | link_enter_failed(link); | |
1006 | return r; | |
1007 | } | |
1008 | } | |
1009 | ||
1010 | if (link->neighbor_messages == 0) { | |
1011 | link->neighbors_configured = true; | |
1012 | link_check_ready(link); | |
1013 | } else | |
1014 | log_link_debug(link, "Setting neighbors"); | |
1015 | ||
1016 | return 0; | |
1017 | } | |
1018 | ||
1019 | static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { | |
1020 | int r; | |
1021 | ||
1022 | assert(rtnl); | |
1023 | assert(m); | |
1024 | assert(link); | |
1025 | assert(link->ifname); | |
1026 | assert(link->address_messages > 0); | |
1027 | assert(IN_SET(link->state, LINK_STATE_CONFIGURING, | |
1028 | LINK_STATE_FAILED, LINK_STATE_LINGER)); | |
1029 | ||
1030 | link->address_messages--; | |
1031 | ||
1032 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) | |
1033 | return 1; | |
1034 | ||
1035 | r = sd_netlink_message_get_errno(m); | |
1036 | if (r < 0 && r != -EEXIST) | |
1037 | log_link_warning_errno(link, r, "could not set address: %m"); | |
1038 | else if (r >= 0) | |
1039 | manager_rtnl_process_address(rtnl, m, link->manager); | |
1040 | ||
1041 | if (link->address_messages == 0) { | |
1042 | log_link_debug(link, "Addresses set"); | |
1043 | link->addresses_configured = true; | |
1044 | link_check_ready(link); | |
1045 | } | |
1046 | ||
1047 | return 1; | |
1048 | } | |
1049 | ||
1050 | static int link_push_uplink_dns_to_dhcp_server(Link *link, sd_dhcp_server *s) { | |
1051 | _cleanup_free_ struct in_addr *addresses = NULL; | |
1052 | size_t n_addresses = 0, n_allocated = 0; | |
1053 | unsigned i; | |
1054 | ||
1055 | log_debug("Copying DNS server information from %s", link->ifname); | |
1056 | ||
1057 | if (!link->network) | |
1058 | return 0; | |
1059 | ||
1060 | for (i = 0; i < link->network->n_dns; i++) { | |
1061 | struct in_addr ia; | |
1062 | ||
1063 | /* Only look for IPv4 addresses */ | |
1064 | if (link->network->dns[i].family != AF_INET) | |
1065 | continue; | |
1066 | ||
1067 | ia = link->network->dns[i].address.in; | |
1068 | ||
1069 | /* Never propagate obviously borked data */ | |
1070 | if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia)) | |
1071 | continue; | |
1072 | ||
1073 | if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1)) | |
1074 | return log_oom(); | |
1075 | ||
1076 | addresses[n_addresses++] = ia; | |
1077 | } | |
1078 | ||
1079 | if (link->network->dhcp_use_dns && link->dhcp_lease) { | |
1080 | const struct in_addr *da = NULL; | |
1081 | int j, n; | |
1082 | ||
1083 | n = sd_dhcp_lease_get_dns(link->dhcp_lease, &da); | |
1084 | if (n > 0) { | |
1085 | ||
1086 | if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n)) | |
1087 | return log_oom(); | |
1088 | ||
1089 | for (j = 0; j < n; j++) | |
1090 | if (in4_addr_is_non_local(&da[j])) | |
1091 | addresses[n_addresses++] = da[j]; | |
1092 | } | |
1093 | } | |
1094 | ||
1095 | if (n_addresses <= 0) | |
1096 | return 0; | |
1097 | ||
1098 | return sd_dhcp_server_set_dns(s, addresses, n_addresses); | |
1099 | } | |
1100 | ||
1101 | static int link_push_uplink_ntp_to_dhcp_server(Link *link, sd_dhcp_server *s) { | |
1102 | _cleanup_free_ struct in_addr *addresses = NULL; | |
1103 | size_t n_addresses = 0, n_allocated = 0; | |
1104 | char **a; | |
1105 | ||
1106 | if (!link->network) | |
1107 | return 0; | |
1108 | ||
1109 | log_debug("Copying NTP server information from %s", link->ifname); | |
1110 | ||
1111 | STRV_FOREACH(a, link->network->ntp) { | |
1112 | union in_addr_union ia; | |
1113 | ||
1114 | /* Only look for IPv4 addresses */ | |
1115 | if (in_addr_from_string(AF_INET, *a, &ia) <= 0) | |
1116 | continue; | |
1117 | ||
1118 | /* Never propagate obviously borked data */ | |
1119 | if (in4_addr_is_null(&ia.in) || in4_addr_is_localhost(&ia.in)) | |
1120 | continue; | |
1121 | ||
1122 | if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1)) | |
1123 | return log_oom(); | |
1124 | ||
1125 | addresses[n_addresses++] = ia.in; | |
1126 | } | |
1127 | ||
1128 | if (link->network->dhcp_use_ntp && link->dhcp_lease) { | |
1129 | const struct in_addr *da = NULL; | |
1130 | int j, n; | |
1131 | ||
1132 | n = sd_dhcp_lease_get_ntp(link->dhcp_lease, &da); | |
1133 | if (n > 0) { | |
1134 | ||
1135 | if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + n)) | |
1136 | return log_oom(); | |
1137 | ||
1138 | for (j = 0; j < n; j++) | |
1139 | if (in4_addr_is_non_local(&da[j])) | |
1140 | addresses[n_addresses++] = da[j]; | |
1141 | } | |
1142 | } | |
1143 | ||
1144 | if (n_addresses <= 0) | |
1145 | return 0; | |
1146 | ||
1147 | return sd_dhcp_server_set_ntp(s, addresses, n_addresses); | |
1148 | } | |
1149 | ||
1150 | static int link_set_bridge_fdb(Link *link) { | |
1151 | FdbEntry *fdb_entry; | |
1152 | int r; | |
1153 | ||
1154 | LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) { | |
1155 | r = fdb_entry_configure(link, fdb_entry); | |
1156 | if (r < 0) | |
1157 | return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m"); | |
1158 | } | |
1159 | ||
1160 | return 0; | |
1161 | } | |
1162 | ||
1163 | static int link_request_set_addresses(Link *link) { | |
1164 | AddressLabel *label; | |
1165 | Address *ad; | |
1166 | int r; | |
1167 | ||
1168 | assert(link); | |
1169 | assert(link->network); | |
1170 | assert(link->state != _LINK_STATE_INVALID); | |
1171 | ||
1172 | link_set_state(link, LINK_STATE_CONFIGURING); | |
1173 | ||
1174 | /* Reset all *_configured flags we are configuring. */ | |
1175 | link->addresses_configured = false; | |
1176 | link->addresses_ready = false; | |
1177 | link->neighbors_configured = false; | |
1178 | link->static_routes_configured = false; | |
1179 | link->routing_policy_rules_configured = false; | |
1180 | ||
1181 | r = link_set_bridge_fdb(link); | |
1182 | if (r < 0) | |
1183 | return r; | |
1184 | ||
1185 | r = link_request_set_neighbors(link); | |
1186 | if (r < 0) | |
1187 | return r; | |
1188 | ||
1189 | LIST_FOREACH(addresses, ad, link->network->static_addresses) { | |
1190 | bool update; | |
1191 | ||
1192 | update = address_get(link, ad->family, &ad->in_addr, ad->prefixlen, NULL) > 0; | |
1193 | ||
1194 | r = address_configure(ad, link, address_handler, update); | |
1195 | if (r < 0) { | |
1196 | log_link_warning_errno(link, r, "Could not set addresses: %m"); | |
1197 | link_enter_failed(link); | |
1198 | return r; | |
1199 | } | |
1200 | if (r > 0) | |
1201 | link->address_messages++; | |
1202 | } | |
1203 | ||
1204 | LIST_FOREACH(labels, label, link->network->address_labels) { | |
1205 | r = address_label_configure(label, link, NULL, false); | |
1206 | if (r < 0) { | |
1207 | log_link_warning_errno(link, r, "Could not set address label: %m"); | |
1208 | link_enter_failed(link); | |
1209 | return r; | |
1210 | } | |
1211 | ||
1212 | link->address_label_messages++; | |
1213 | } | |
1214 | ||
1215 | /* now that we can figure out a default address for the dhcp server, | |
1216 | start it */ | |
1217 | if (link_dhcp4_server_enabled(link) && (link->flags & IFF_UP)) { | |
1218 | Address *address; | |
1219 | Link *uplink = NULL; | |
1220 | bool acquired_uplink = false; | |
1221 | ||
1222 | address = link_find_dhcp_server_address(link); | |
1223 | if (!address) { | |
1224 | log_link_warning(link, "Failed to find suitable address for DHCPv4 server instance."); | |
1225 | link_enter_failed(link); | |
1226 | return 0; | |
1227 | } | |
1228 | ||
1229 | /* use the server address' subnet as the pool */ | |
1230 | r = sd_dhcp_server_configure_pool(link->dhcp_server, &address->in_addr.in, address->prefixlen, | |
1231 | link->network->dhcp_server_pool_offset, link->network->dhcp_server_pool_size); | |
1232 | if (r < 0) | |
1233 | return r; | |
1234 | ||
1235 | /* TODO: | |
1236 | r = sd_dhcp_server_set_router(link->dhcp_server, | |
1237 | &main_address->in_addr.in); | |
1238 | if (r < 0) | |
1239 | return r; | |
1240 | */ | |
1241 | ||
1242 | if (link->network->dhcp_server_max_lease_time_usec > 0) { | |
1243 | r = sd_dhcp_server_set_max_lease_time( | |
1244 | link->dhcp_server, | |
1245 | DIV_ROUND_UP(link->network->dhcp_server_max_lease_time_usec, USEC_PER_SEC)); | |
1246 | if (r < 0) | |
1247 | return r; | |
1248 | } | |
1249 | ||
1250 | if (link->network->dhcp_server_default_lease_time_usec > 0) { | |
1251 | r = sd_dhcp_server_set_default_lease_time( | |
1252 | link->dhcp_server, | |
1253 | DIV_ROUND_UP(link->network->dhcp_server_default_lease_time_usec, USEC_PER_SEC)); | |
1254 | if (r < 0) | |
1255 | return r; | |
1256 | } | |
1257 | ||
1258 | if (link->network->dhcp_server_emit_dns) { | |
1259 | ||
1260 | if (link->network->n_dhcp_server_dns > 0) | |
1261 | r = sd_dhcp_server_set_dns(link->dhcp_server, link->network->dhcp_server_dns, link->network->n_dhcp_server_dns); | |
1262 | else { | |
1263 | uplink = manager_find_uplink(link->manager, link); | |
1264 | acquired_uplink = true; | |
1265 | ||
1266 | if (!uplink) { | |
1267 | log_link_debug(link, "Not emitting DNS server information on link, couldn't find suitable uplink."); | |
1268 | r = 0; | |
1269 | } else | |
1270 | r = link_push_uplink_dns_to_dhcp_server(uplink, link->dhcp_server); | |
1271 | } | |
1272 | if (r < 0) | |
1273 | log_link_warning_errno(link, r, "Failed to set DNS server for DHCP server, ignoring: %m"); | |
1274 | } | |
1275 | ||
1276 | if (link->network->dhcp_server_emit_ntp) { | |
1277 | ||
1278 | if (link->network->n_dhcp_server_ntp > 0) | |
1279 | r = sd_dhcp_server_set_ntp(link->dhcp_server, link->network->dhcp_server_ntp, link->network->n_dhcp_server_ntp); | |
1280 | else { | |
1281 | if (!acquired_uplink) | |
1282 | uplink = manager_find_uplink(link->manager, link); | |
1283 | ||
1284 | if (!uplink) { | |
1285 | log_link_debug(link, "Not emitting NTP server information on link, couldn't find suitable uplink."); | |
1286 | r = 0; | |
1287 | } else | |
1288 | r = link_push_uplink_ntp_to_dhcp_server(uplink, link->dhcp_server); | |
1289 | ||
1290 | } | |
1291 | if (r < 0) | |
1292 | log_link_warning_errno(link, r, "Failed to set NTP server for DHCP server, ignoring: %m"); | |
1293 | } | |
1294 | ||
1295 | r = sd_dhcp_server_set_emit_router(link->dhcp_server, link->network->dhcp_server_emit_router); | |
1296 | if (r < 0) | |
1297 | return log_link_warning_errno(link, r, "Failed to set router emission for DHCP server: %m"); | |
1298 | ||
1299 | if (link->network->dhcp_server_emit_timezone) { | |
1300 | _cleanup_free_ char *buffer = NULL; | |
1301 | const char *tz = NULL; | |
1302 | ||
1303 | if (link->network->dhcp_server_timezone) | |
1304 | tz = link->network->dhcp_server_timezone; | |
1305 | else { | |
1306 | r = get_timezone(&buffer); | |
1307 | if (r < 0) | |
1308 | log_warning_errno(r, "Failed to determine timezone: %m"); | |
1309 | else | |
1310 | tz = buffer; | |
1311 | } | |
1312 | ||
1313 | if (tz) { | |
1314 | r = sd_dhcp_server_set_timezone(link->dhcp_server, tz); | |
1315 | if (r < 0) | |
1316 | return r; | |
1317 | } | |
1318 | } | |
1319 | if (!sd_dhcp_server_is_running(link->dhcp_server)) { | |
1320 | r = sd_dhcp_server_start(link->dhcp_server); | |
1321 | if (r < 0) { | |
1322 | log_link_warning_errno(link, r, "Could not start DHCPv4 server instance: %m"); | |
1323 | ||
1324 | link_enter_failed(link); | |
1325 | ||
1326 | return 0; | |
1327 | } | |
1328 | } | |
1329 | ||
1330 | log_link_debug(link, "Offering DHCPv4 leases"); | |
1331 | } | |
1332 | ||
1333 | if (link->address_messages == 0) { | |
1334 | link->addresses_configured = true; | |
1335 | link_check_ready(link); | |
1336 | } else | |
1337 | log_link_debug(link, "Setting addresses"); | |
1338 | ||
1339 | return 0; | |
1340 | } | |
1341 | ||
1342 | static int link_set_bridge_vlan(Link *link) { | |
1343 | int r; | |
1344 | ||
1345 | r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap); | |
1346 | if (r < 0) | |
1347 | log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m"); | |
1348 | ||
1349 | return r; | |
1350 | } | |
1351 | ||
1352 | static int link_set_proxy_arp(Link *link) { | |
1353 | int r; | |
1354 | ||
1355 | if (!link_proxy_arp_enabled(link)) | |
1356 | return 0; | |
1357 | ||
1358 | r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "proxy_arp", link->network->proxy_arp > 0); | |
1359 | if (r < 0) | |
1360 | log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m"); | |
1361 | ||
1362 | return 0; | |
1363 | } | |
1364 | ||
1365 | static int link_configure_after_setting_mtu(Link *link); | |
1366 | ||
1367 | static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { | |
1368 | int r; | |
1369 | ||
1370 | assert(m); | |
1371 | assert(link); | |
1372 | assert(link->ifname); | |
1373 | ||
1374 | link->setting_mtu = false; | |
1375 | ||
1376 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) | |
1377 | return 1; | |
1378 | ||
1379 | r = sd_netlink_message_get_errno(m); | |
1380 | if (r < 0) { | |
1381 | log_link_warning_errno(link, r, "Could not set MTU: %m"); | |
1382 | return 1; | |
1383 | } | |
1384 | ||
1385 | log_link_debug(link, "Setting MTU done."); | |
1386 | ||
1387 | if (link->state == LINK_STATE_INITIALIZED) | |
1388 | (void) link_configure_after_setting_mtu(link); | |
1389 | ||
1390 | return 1; | |
1391 | } | |
1392 | ||
1393 | int link_set_mtu(Link *link, uint32_t mtu) { | |
1394 | _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL; | |
1395 | int r; | |
1396 | ||
1397 | assert(link); | |
1398 | assert(link->manager); | |
1399 | assert(link->manager->rtnl); | |
1400 | ||
1401 | if (mtu == 0 || link->setting_mtu) | |
1402 | return 0; | |
1403 | ||
1404 | if (link->mtu == mtu) | |
1405 | return 0; | |
1406 | ||
1407 | log_link_debug(link, "Setting MTU: %" PRIu32, mtu); | |
1408 | ||
1409 | r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex); | |
1410 | if (r < 0) | |
1411 | return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m"); | |
1412 | ||
1413 | /* If IPv6 not configured (no static IPv6 address and IPv6LL autoconfiguration is disabled) | |
1414 | * for this interface, then disable IPv6 else enable it. */ | |
1415 | (void) link_enable_ipv6(link); | |
1416 | ||
1417 | /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes | |
1418 | * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */ | |
1419 | if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) { | |
1420 | ||
1421 | log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as " | |
1422 | "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes: %m"); | |
1423 | ||
1424 | mtu = IPV6_MIN_MTU; | |
1425 | } | |
1426 | ||
1427 | r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu); | |
1428 | if (r < 0) | |
1429 | return log_link_error_errno(link, r, "Could not append MTU: %m"); | |
1430 | ||
1431 | r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler, | |
1432 | link_netlink_destroy_callback, link); | |
1433 | if (r < 0) | |
1434 | return log_link_error_errno(link, r, "Could not send rtnetlink message: %m"); | |
1435 | ||
1436 | link_ref(link); | |
1437 | link->setting_mtu = true; | |
1438 | ||
1439 | return 0; | |
1440 | } | |
1441 | ||
1442 | static bool link_reduces_vlan_mtu(Link *link) { | |
1443 | /* See netif_reduces_vlan_mtu() in kernel. */ | |
1444 | return streq_ptr(link->kind, "macsec"); | |
1445 | } | |
1446 | ||
1447 | static uint32_t link_get_requested_mtu_by_stacked_netdevs(Link *link) { | |
1448 | uint32_t mtu = 0; | |
1449 | NetDev *dev; | |
1450 | Iterator i; | |
1451 | ||
1452 | HASHMAP_FOREACH(dev, link->network->stacked_netdevs, i) | |
1453 | if (dev->kind == NETDEV_KIND_VLAN && dev->mtu > 0) | |
1454 | /* See vlan_dev_change_mtu() in kernel. */ | |
1455 | mtu = MAX(mtu, link_reduces_vlan_mtu(link) ? dev->mtu + 4 : dev->mtu); | |
1456 | ||
1457 | else if (dev->kind == NETDEV_KIND_MACVLAN && dev->mtu > mtu) | |
1458 | /* See macvlan_change_mtu() in kernel. */ | |
1459 | mtu = dev->mtu; | |
1460 | ||
1461 | return mtu; | |
1462 | } | |
1463 | ||
1464 | static int link_configure_mtu(Link *link) { | |
1465 | uint32_t mtu; | |
1466 | ||
1467 | assert(link); | |
1468 | assert(link->network); | |
1469 | ||
1470 | if (link->network->mtu > 0) | |
1471 | return link_set_mtu(link, link->network->mtu); | |
1472 | ||
1473 | mtu = link_get_requested_mtu_by_stacked_netdevs(link); | |
1474 | if (link->mtu >= mtu) | |
1475 | return 0; | |
1476 | ||
1477 | log_link_notice(link, "Bumping MTU bytes from %"PRIu32" to %"PRIu32" because of stacked device. " | |
1478 | "If it is not desired, then please explicitly specify MTUBytes= setting.", | |
1479 | link->mtu, mtu); | |
1480 | ||
1481 | return link_set_mtu(link, mtu); | |
1482 | } | |
1483 | ||
1484 | static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { | |
1485 | int r; | |
1486 | ||
1487 | assert(m); | |
1488 | assert(link); | |
1489 | assert(link->ifname); | |
1490 | ||
1491 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) | |
1492 | return 1; | |
1493 | ||
1494 | r = sd_netlink_message_get_errno(m); | |
1495 | if (r < 0) | |
1496 | log_link_warning_errno(link, r, "Could not set link flags: %m"); | |
1497 | ||
1498 | return 1; | |
1499 | } | |
1500 | ||
1501 | static int link_set_flags(Link *link) { | |
1502 | _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL; | |
1503 | unsigned ifi_change = 0; | |
1504 | unsigned ifi_flags = 0; | |
1505 | int r; | |
1506 | ||
1507 | assert(link); | |
1508 | assert(link->manager); | |
1509 | assert(link->manager->rtnl); | |
1510 | ||
1511 | if (link->flags & IFF_LOOPBACK) | |
1512 | return 0; | |
1513 | ||
1514 | if (!link->network) | |
1515 | return 0; | |
1516 | ||
1517 | if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0) | |
1518 | return 0; | |
1519 | ||
1520 | r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex); | |
1521 | if (r < 0) | |
1522 | return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m"); | |
1523 | ||
1524 | if (link->network->arp >= 0) { | |
1525 | ifi_change |= IFF_NOARP; | |
1526 | SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0); | |
1527 | } | |
1528 | ||
1529 | if (link->network->multicast >= 0) { | |
1530 | ifi_change |= IFF_MULTICAST; | |
1531 | SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast); | |
1532 | } | |
1533 | ||
1534 | if (link->network->allmulticast >= 0) { | |
1535 | ifi_change |= IFF_ALLMULTI; | |
1536 | SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast); | |
1537 | } | |
1538 | ||
1539 | r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change); | |
1540 | if (r < 0) | |
1541 | return log_link_error_errno(link, r, "Could not set link flags: %m"); | |
1542 | ||
1543 | r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler, | |
1544 | link_netlink_destroy_callback, link); | |
1545 | if (r < 0) | |
1546 | return log_link_error_errno(link, r, "Could not send rtnetlink message: %m"); | |
1547 | ||
1548 | link_ref(link); | |
1549 | ||
1550 | return 0; | |
1551 | } | |
1552 | ||
1553 | static int link_acquire_ipv6_conf(Link *link) { | |
1554 | int r; | |
1555 | ||
1556 | assert(link); | |
1557 | ||
1558 | if (link_ipv6_accept_ra_enabled(link)) { | |
1559 | assert(link->ndisc); | |
1560 | ||
1561 | log_link_debug(link, "Discovering IPv6 routers"); | |
1562 | ||
1563 | r = sd_ndisc_start(link->ndisc); | |
1564 | if (r < 0 && r != -EBUSY) | |
1565 | return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m"); | |
1566 | } | |
1567 | ||
1568 | if (link_radv_enabled(link)) { | |
1569 | assert(link->radv); | |
1570 | assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0); | |
1571 | ||
1572 | log_link_debug(link, "Starting IPv6 Router Advertisements"); | |
1573 | ||
1574 | r = sd_radv_start(link->radv); | |
1575 | if (r < 0 && r != -EBUSY) | |
1576 | return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m"); | |
1577 | } | |
1578 | ||
1579 | (void) dhcp6_request_prefix_delegation(link); | |
1580 | ||
1581 | return 0; | |
1582 | } | |
1583 | ||
1584 | static int link_acquire_ipv4_conf(Link *link) { | |
1585 | int r; | |
1586 | ||
1587 | assert(link); | |
1588 | assert(link->manager); | |
1589 | assert(link->manager->event); | |
1590 | ||
1591 | if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4)) { | |
1592 | assert(link->ipv4ll); | |
1593 | ||
1594 | log_link_debug(link, "Acquiring IPv4 link-local address"); | |
1595 | ||
1596 | r = sd_ipv4ll_start(link->ipv4ll); | |
1597 | if (r < 0) | |
1598 | return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m"); | |
1599 | } | |
1600 | ||
1601 | if (link_dhcp4_enabled(link)) { | |
1602 | assert(link->dhcp_client); | |
1603 | ||
1604 | log_link_debug(link, "Acquiring DHCPv4 lease"); | |
1605 | ||
1606 | r = sd_dhcp_client_start(link->dhcp_client); | |
1607 | if (r < 0) | |
1608 | return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m"); | |
1609 | } | |
1610 | ||
1611 | return 0; | |
1612 | } | |
1613 | ||
1614 | static int link_acquire_conf(Link *link) { | |
1615 | int r; | |
1616 | ||
1617 | assert(link); | |
1618 | ||
1619 | r = link_acquire_ipv4_conf(link); | |
1620 | if (r < 0) | |
1621 | return r; | |
1622 | ||
1623 | if (!in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) { | |
1624 | r = link_acquire_ipv6_conf(link); | |
1625 | if (r < 0) | |
1626 | return r; | |
1627 | } | |
1628 | ||
1629 | if (link_lldp_emit_enabled(link)) { | |
1630 | r = link_lldp_emit_start(link); | |
1631 | if (r < 0) | |
1632 | return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m"); | |
1633 | } | |
1634 | ||
1635 | return 0; | |
1636 | } | |
1637 | ||
1638 | bool link_has_carrier(Link *link) { | |
1639 | /* see Documentation/networking/operstates.txt in the kernel sources */ | |
1640 | ||
1641 | if (link->kernel_operstate == IF_OPER_UP) | |
1642 | return true; | |
1643 | ||
1644 | if (link->kernel_operstate == IF_OPER_UNKNOWN) | |
1645 | /* operstate may not be implemented, so fall back to flags */ | |
1646 | if (FLAGS_SET(link->flags, IFF_LOWER_UP | IFF_RUNNING) && | |
1647 | !FLAGS_SET(link->flags, IFF_DORMANT)) | |
1648 | return true; | |
1649 | ||
1650 | return false; | |
1651 | } | |
1652 | ||
1653 | static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { | |
1654 | int r; | |
1655 | ||
1656 | assert(link); | |
1657 | ||
1658 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) | |
1659 | return 1; | |
1660 | ||
1661 | r = sd_netlink_message_get_errno(m); | |
1662 | if (r < 0) | |
1663 | log_link_warning_errno(link, r, "Could not set address genmode for interface: %m"); | |
1664 | ||
1665 | return 1; | |
1666 | } | |
1667 | ||
1668 | static int link_configure_addrgen_mode(Link *link) { | |
1669 | _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL; | |
1670 | uint8_t ipv6ll_mode; | |
1671 | int r; | |
1672 | ||
1673 | assert(link); | |
1674 | assert(link->network); | |
1675 | assert(link->manager); | |
1676 | assert(link->manager->rtnl); | |
1677 | ||
1678 | if (!socket_ipv6_is_supported()) | |
1679 | return 0; | |
1680 | ||
1681 | log_link_debug(link, "Setting address genmode for link"); | |
1682 | ||
1683 | r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex); | |
1684 | if (r < 0) | |
1685 | return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m"); | |
1686 | ||
1687 | r = sd_netlink_message_open_container(req, IFLA_AF_SPEC); | |
1688 | if (r < 0) | |
1689 | return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m"); | |
1690 | ||
1691 | r = sd_netlink_message_open_container(req, AF_INET6); | |
1692 | if (r < 0) | |
1693 | return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m"); | |
1694 | ||
1695 | if (!link_ipv6ll_enabled(link)) | |
1696 | ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE; | |
1697 | else if (sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL) < 0) | |
1698 | /* The file may not exist. And event if it exists, when stable_secret is unset, | |
1699 | * reading the file fails with EIO. */ | |
1700 | ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64; | |
1701 | else | |
1702 | ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY; | |
1703 | ||
1704 | r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode); | |
1705 | if (r < 0) | |
1706 | return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m"); | |
1707 | ||
1708 | r = sd_netlink_message_close_container(req); | |
1709 | if (r < 0) | |
1710 | return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m"); | |
1711 | ||
1712 | r = sd_netlink_message_close_container(req); | |
1713 | if (r < 0) | |
1714 | return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m"); | |
1715 | ||
1716 | r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler, | |
1717 | link_netlink_destroy_callback, link); | |
1718 | if (r < 0) | |
1719 | return log_link_error_errno(link, r, "Could not send rtnetlink message: %m"); | |
1720 | ||
1721 | link_ref(link); | |
1722 | ||
1723 | return 0; | |
1724 | } | |
1725 | ||
1726 | static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { | |
1727 | int r; | |
1728 | ||
1729 | assert(link); | |
1730 | ||
1731 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) | |
1732 | return 1; | |
1733 | ||
1734 | r = sd_netlink_message_get_errno(m); | |
1735 | if (r < 0) | |
1736 | /* we warn but don't fail the link, as it may be brought up later */ | |
1737 | log_link_warning_errno(link, r, "Could not bring up interface: %m"); | |
1738 | ||
1739 | return 1; | |
1740 | } | |
1741 | ||
1742 | static int link_up(Link *link) { | |
1743 | _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL; | |
1744 | int r; | |
1745 | ||
1746 | assert(link); | |
1747 | assert(link->network); | |
1748 | assert(link->manager); | |
1749 | assert(link->manager->rtnl); | |
1750 | ||
1751 | log_link_debug(link, "Bringing link up"); | |
1752 | ||
1753 | r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex); | |
1754 | if (r < 0) | |
1755 | return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m"); | |
1756 | ||
1757 | /* set it free if not enslaved with networkd */ | |
1758 | if (!link->network->bridge && !link->network->bond && !link->network->vrf) { | |
1759 | r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0); | |
1760 | if (r < 0) | |
1761 | return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m"); | |
1762 | } | |
1763 | ||
1764 | r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP); | |
1765 | if (r < 0) | |
1766 | return log_link_error_errno(link, r, "Could not set link flags: %m"); | |
1767 | ||
1768 | if (link->network->mac) { | |
1769 | r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac); | |
1770 | if (r < 0) | |
1771 | return log_link_error_errno(link, r, "Could not set MAC address: %m"); | |
1772 | } | |
1773 | ||
1774 | r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler, | |
1775 | link_netlink_destroy_callback, link); | |
1776 | if (r < 0) | |
1777 | return log_link_error_errno(link, r, "Could not send rtnetlink message: %m"); | |
1778 | ||
1779 | link_ref(link); | |
1780 | ||
1781 | return 0; | |
1782 | } | |
1783 | ||
1784 | static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { | |
1785 | int r; | |
1786 | ||
1787 | assert(link); | |
1788 | ||
1789 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) | |
1790 | return 1; | |
1791 | ||
1792 | r = sd_netlink_message_get_errno(m); | |
1793 | if (r < 0) | |
1794 | log_link_warning_errno(link, r, "Could not bring down interface: %m"); | |
1795 | ||
1796 | return 1; | |
1797 | } | |
1798 | ||
1799 | int link_down(Link *link, link_netlink_message_handler_t callback) { | |
1800 | _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL; | |
1801 | int r; | |
1802 | ||
1803 | assert(link); | |
1804 | assert(link->manager); | |
1805 | assert(link->manager->rtnl); | |
1806 | ||
1807 | log_link_debug(link, "Bringing link down"); | |
1808 | ||
1809 | r = sd_rtnl_message_new_link(link->manager->rtnl, &req, | |
1810 | RTM_SETLINK, link->ifindex); | |
1811 | if (r < 0) | |
1812 | return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m"); | |
1813 | ||
1814 | r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP); | |
1815 | if (r < 0) | |
1816 | return log_link_error_errno(link, r, "Could not set link flags: %m"); | |
1817 | ||
1818 | r = netlink_call_async(link->manager->rtnl, NULL, req, | |
1819 | callback ?: link_down_handler, | |
1820 | link_netlink_destroy_callback, link); | |
1821 | if (r < 0) | |
1822 | return log_link_error_errno(link, r, "Could not send rtnetlink message: %m"); | |
1823 | ||
1824 | link_ref(link); | |
1825 | ||
1826 | return 0; | |
1827 | } | |
1828 | ||
1829 | static int link_handle_bound_to_list(Link *link) { | |
1830 | Link *l; | |
1831 | Iterator i; | |
1832 | int r; | |
1833 | bool required_up = false; | |
1834 | bool link_is_up = false; | |
1835 | ||
1836 | assert(link); | |
1837 | ||
1838 | if (hashmap_isempty(link->bound_to_links)) | |
1839 | return 0; | |
1840 | ||
1841 | if (link->flags & IFF_UP) | |
1842 | link_is_up = true; | |
1843 | ||
1844 | HASHMAP_FOREACH (l, link->bound_to_links, i) | |
1845 | if (link_has_carrier(l)) { | |
1846 | required_up = true; | |
1847 | break; | |
1848 | } | |
1849 | ||
1850 | if (!required_up && link_is_up) { | |
1851 | r = link_down(link, NULL); | |
1852 | if (r < 0) | |
1853 | return r; | |
1854 | } else if (required_up && !link_is_up) { | |
1855 | r = link_up(link); | |
1856 | if (r < 0) | |
1857 | return r; | |
1858 | } | |
1859 | ||
1860 | return 0; | |
1861 | } | |
1862 | ||
1863 | static int link_handle_bound_by_list(Link *link) { | |
1864 | Iterator i; | |
1865 | Link *l; | |
1866 | int r; | |
1867 | ||
1868 | assert(link); | |
1869 | ||
1870 | if (hashmap_isempty(link->bound_by_links)) | |
1871 | return 0; | |
1872 | ||
1873 | HASHMAP_FOREACH (l, link->bound_by_links, i) { | |
1874 | r = link_handle_bound_to_list(l); | |
1875 | if (r < 0) | |
1876 | return r; | |
1877 | } | |
1878 | ||
1879 | return 0; | |
1880 | } | |
1881 | ||
1882 | static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) { | |
1883 | int r; | |
1884 | ||
1885 | assert(link); | |
1886 | assert(carrier); | |
1887 | ||
1888 | if (link == carrier) | |
1889 | return 0; | |
1890 | ||
1891 | if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex))) | |
1892 | return 0; | |
1893 | ||
1894 | r = hashmap_ensure_allocated(h, NULL); | |
1895 | if (r < 0) | |
1896 | return r; | |
1897 | ||
1898 | r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier); | |
1899 | if (r < 0) | |
1900 | return r; | |
1901 | ||
1902 | return 0; | |
1903 | } | |
1904 | ||
1905 | static int link_new_bound_by_list(Link *link) { | |
1906 | Manager *m; | |
1907 | Link *carrier; | |
1908 | Iterator i; | |
1909 | int r; | |
1910 | bool list_updated = false; | |
1911 | ||
1912 | assert(link); | |
1913 | assert(link->manager); | |
1914 | ||
1915 | m = link->manager; | |
1916 | ||
1917 | HASHMAP_FOREACH(carrier, m->links, i) { | |
1918 | if (!carrier->network) | |
1919 | continue; | |
1920 | ||
1921 | if (strv_isempty(carrier->network->bind_carrier)) | |
1922 | continue; | |
1923 | ||
1924 | if (strv_fnmatch(carrier->network->bind_carrier, link->ifname, 0)) { | |
1925 | r = link_put_carrier(link, carrier, &link->bound_by_links); | |
1926 | if (r < 0) | |
1927 | return r; | |
1928 | ||
1929 | list_updated = true; | |
1930 | } | |
1931 | } | |
1932 | ||
1933 | if (list_updated) | |
1934 | link_dirty(link); | |
1935 | ||
1936 | HASHMAP_FOREACH(carrier, link->bound_by_links, i) { | |
1937 | r = link_put_carrier(carrier, link, &carrier->bound_to_links); | |
1938 | if (r < 0) | |
1939 | return r; | |
1940 | ||
1941 | link_dirty(carrier); | |
1942 | } | |
1943 | ||
1944 | return 0; | |
1945 | } | |
1946 | ||
1947 | static int link_new_bound_to_list(Link *link) { | |
1948 | Manager *m; | |
1949 | Link *carrier; | |
1950 | Iterator i; | |
1951 | int r; | |
1952 | bool list_updated = false; | |
1953 | ||
1954 | assert(link); | |
1955 | assert(link->manager); | |
1956 | ||
1957 | if (!link->network) | |
1958 | return 0; | |
1959 | ||
1960 | if (strv_isempty(link->network->bind_carrier)) | |
1961 | return 0; | |
1962 | ||
1963 | m = link->manager; | |
1964 | ||
1965 | HASHMAP_FOREACH (carrier, m->links, i) { | |
1966 | if (strv_fnmatch(link->network->bind_carrier, carrier->ifname, 0)) { | |
1967 | r = link_put_carrier(link, carrier, &link->bound_to_links); | |
1968 | if (r < 0) | |
1969 | return r; | |
1970 | ||
1971 | list_updated = true; | |
1972 | } | |
1973 | } | |
1974 | ||
1975 | if (list_updated) | |
1976 | link_dirty(link); | |
1977 | ||
1978 | HASHMAP_FOREACH (carrier, link->bound_to_links, i) { | |
1979 | r = link_put_carrier(carrier, link, &carrier->bound_by_links); | |
1980 | if (r < 0) | |
1981 | return r; | |
1982 | ||
1983 | link_dirty(carrier); | |
1984 | } | |
1985 | ||
1986 | return 0; | |
1987 | } | |
1988 | ||
1989 | static int link_new_carrier_maps(Link *link) { | |
1990 | int r; | |
1991 | ||
1992 | r = link_new_bound_by_list(link); | |
1993 | if (r < 0) | |
1994 | return r; | |
1995 | ||
1996 | r = link_handle_bound_by_list(link); | |
1997 | if (r < 0) | |
1998 | return r; | |
1999 | ||
2000 | r = link_new_bound_to_list(link); | |
2001 | if (r < 0) | |
2002 | return r; | |
2003 | ||
2004 | r = link_handle_bound_to_list(link); | |
2005 | if (r < 0) | |
2006 | return r; | |
2007 | ||
2008 | return 0; | |
2009 | } | |
2010 | ||
2011 | static void link_free_bound_to_list(Link *link) { | |
2012 | Link *bound_to; | |
2013 | Iterator i; | |
2014 | ||
2015 | HASHMAP_FOREACH (bound_to, link->bound_to_links, i) { | |
2016 | hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex)); | |
2017 | ||
2018 | if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex))) | |
2019 | link_dirty(bound_to); | |
2020 | } | |
2021 | ||
2022 | return; | |
2023 | } | |
2024 | ||
2025 | static void link_free_bound_by_list(Link *link) { | |
2026 | Link *bound_by; | |
2027 | Iterator i; | |
2028 | ||
2029 | HASHMAP_FOREACH (bound_by, link->bound_by_links, i) { | |
2030 | hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex)); | |
2031 | ||
2032 | if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) { | |
2033 | link_dirty(bound_by); | |
2034 | link_handle_bound_to_list(bound_by); | |
2035 | } | |
2036 | } | |
2037 | ||
2038 | return; | |
2039 | } | |
2040 | ||
2041 | static void link_free_carrier_maps(Link *link) { | |
2042 | bool list_updated = false; | |
2043 | ||
2044 | assert(link); | |
2045 | ||
2046 | if (!hashmap_isempty(link->bound_to_links)) { | |
2047 | link_free_bound_to_list(link); | |
2048 | list_updated = true; | |
2049 | } | |
2050 | ||
2051 | if (!hashmap_isempty(link->bound_by_links)) { | |
2052 | link_free_bound_by_list(link); | |
2053 | list_updated = true; | |
2054 | } | |
2055 | ||
2056 | if (list_updated) | |
2057 | link_dirty(link); | |
2058 | ||
2059 | return; | |
2060 | } | |
2061 | ||
2062 | static int link_append_to_master(Link *link, NetDev *netdev) { | |
2063 | Link *master; | |
2064 | int r; | |
2065 | ||
2066 | assert(link); | |
2067 | assert(netdev); | |
2068 | ||
2069 | r = link_get(link->manager, netdev->ifindex, &master); | |
2070 | if (r < 0) | |
2071 | return r; | |
2072 | ||
2073 | r = set_ensure_allocated(&master->slaves, NULL); | |
2074 | if (r < 0) | |
2075 | return r; | |
2076 | ||
2077 | r = set_put(master->slaves, link); | |
2078 | if (r < 0) | |
2079 | return r; | |
2080 | ||
2081 | link_ref(link); | |
2082 | return 0; | |
2083 | } | |
2084 | ||
2085 | static void link_drop_from_master(Link *link, NetDev *netdev) { | |
2086 | Link *master; | |
2087 | ||
2088 | assert(link); | |
2089 | ||
2090 | if (!link->manager || !netdev) | |
2091 | return; | |
2092 | ||
2093 | if (link_get(link->manager, netdev->ifindex, &master) < 0) | |
2094 | return; | |
2095 | ||
2096 | link_unref(set_remove(master->slaves, link)); | |
2097 | } | |
2098 | ||
2099 | static void link_detach_from_manager(Link *link) { | |
2100 | if (!link || !link->manager) | |
2101 | return; | |
2102 | ||
2103 | link_unref(set_remove(link->manager->links_requesting_uuid, link)); | |
2104 | link_clean(link); | |
2105 | ||
2106 | /* The following must be called at last. */ | |
2107 | assert_se(hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex)) == link); | |
2108 | link_unref(link); | |
2109 | } | |
2110 | ||
2111 | void link_drop(Link *link) { | |
2112 | if (!link || link->state == LINK_STATE_LINGER) | |
2113 | return; | |
2114 | ||
2115 | link_set_state(link, LINK_STATE_LINGER); | |
2116 | ||
2117 | link_free_carrier_maps(link); | |
2118 | ||
2119 | if (link->network) { | |
2120 | link_drop_from_master(link, link->network->bridge); | |
2121 | link_drop_from_master(link, link->network->bond); | |
2122 | } | |
2123 | ||
2124 | log_link_debug(link, "Link removed"); | |
2125 | ||
2126 | (void) unlink(link->state_file); | |
2127 | link_detach_from_manager(link); | |
2128 | } | |
2129 | ||
2130 | static int link_joined(Link *link) { | |
2131 | int r; | |
2132 | ||
2133 | assert(link); | |
2134 | assert(link->network); | |
2135 | ||
2136 | if (!hashmap_isempty(link->bound_to_links)) { | |
2137 | r = link_handle_bound_to_list(link); | |
2138 | if (r < 0) | |
2139 | return r; | |
2140 | } else if (!(link->flags & IFF_UP)) { | |
2141 | r = link_up(link); | |
2142 | if (r < 0) { | |
2143 | link_enter_failed(link); | |
2144 | return r; | |
2145 | } | |
2146 | } | |
2147 | ||
2148 | if (link->network->bridge) { | |
2149 | r = link_set_bridge(link); | |
2150 | if (r < 0) | |
2151 | log_link_error_errno(link, r, "Could not set bridge message: %m"); | |
2152 | ||
2153 | r = link_append_to_master(link, link->network->bridge); | |
2154 | if (r < 0) | |
2155 | log_link_error_errno(link, r, "Failed to add to bridge master's slave list: %m"); | |
2156 | } | |
2157 | ||
2158 | if (link->network->bond) { | |
2159 | r = link_set_bond(link); | |
2160 | if (r < 0) | |
2161 | log_link_error_errno(link, r, "Could not set bond message: %m"); | |
2162 | ||
2163 | r = link_append_to_master(link, link->network->bond); | |
2164 | if (r < 0) | |
2165 | log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m"); | |
2166 | } | |
2167 | ||
2168 | if (link->network->use_br_vlan && | |
2169 | (link->network->bridge || streq_ptr("bridge", link->kind))) { | |
2170 | r = link_set_bridge_vlan(link); | |
2171 | if (r < 0) | |
2172 | log_link_error_errno(link, r, "Could not set bridge vlan: %m"); | |
2173 | } | |
2174 | ||
2175 | /* Skip setting up addresses until it gets carrier, | |
2176 | or it would try to set addresses twice, | |
2177 | which is bad for non-idempotent steps. */ | |
2178 | if (!link_has_carrier(link) && !link->network->configure_without_carrier) | |
2179 | return 0; | |
2180 | ||
2181 | return link_request_set_addresses(link); | |
2182 | } | |
2183 | ||
2184 | static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { | |
2185 | int r; | |
2186 | ||
2187 | assert(link); | |
2188 | assert(link->network); | |
2189 | assert(link->enslaving > 0); | |
2190 | ||
2191 | link->enslaving--; | |
2192 | ||
2193 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) | |
2194 | return 1; | |
2195 | ||
2196 | r = sd_netlink_message_get_errno(m); | |
2197 | if (r < 0 && r != -EEXIST) { | |
2198 | log_link_error_errno(link, r, "Could not join netdev: %m"); | |
2199 | link_enter_failed(link); | |
2200 | return 1; | |
2201 | } else | |
2202 | log_link_debug(link, "Joined netdev"); | |
2203 | ||
2204 | if (link->enslaving == 0) { | |
2205 | link_joined(link); | |
2206 | } | |
2207 | ||
2208 | return 1; | |
2209 | } | |
2210 | ||
2211 | static int link_enter_join_netdev(Link *link) { | |
2212 | NetDev *netdev; | |
2213 | Iterator i; | |
2214 | int r; | |
2215 | ||
2216 | assert(link); | |
2217 | assert(link->network); | |
2218 | assert(link->state == LINK_STATE_INITIALIZED); | |
2219 | ||
2220 | link_set_state(link, LINK_STATE_CONFIGURING); | |
2221 | ||
2222 | link_dirty(link); | |
2223 | link->enslaving = 0; | |
2224 | ||
2225 | if (link->network->bond) { | |
2226 | if (link->network->bond->state == NETDEV_STATE_READY && | |
2227 | link->network->bond->ifindex == link->master_ifindex) | |
2228 | return link_joined(link); | |
2229 | ||
2230 | log_struct(LOG_DEBUG, | |
2231 | LOG_LINK_INTERFACE(link), | |
2232 | LOG_NETDEV_INTERFACE(link->network->bond), | |
2233 | LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname)); | |
2234 | ||
2235 | link->enslaving++; | |
2236 | ||
2237 | r = netdev_join(link->network->bond, link, netdev_join_handler); | |
2238 | if (r < 0) { | |
2239 | log_struct_errno(LOG_WARNING, r, | |
2240 | LOG_LINK_INTERFACE(link), | |
2241 | LOG_NETDEV_INTERFACE(link->network->bond), | |
2242 | LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname)); | |
2243 | link_enter_failed(link); | |
2244 | return r; | |
2245 | } | |
2246 | } | |
2247 | ||
2248 | if (link->network->bridge) { | |
2249 | log_struct(LOG_DEBUG, | |
2250 | LOG_LINK_INTERFACE(link), | |
2251 | LOG_NETDEV_INTERFACE(link->network->bridge), | |
2252 | LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname)); | |
2253 | ||
2254 | link->enslaving++; | |
2255 | ||
2256 | r = netdev_join(link->network->bridge, link, netdev_join_handler); | |
2257 | if (r < 0) { | |
2258 | log_struct_errno(LOG_WARNING, r, | |
2259 | LOG_LINK_INTERFACE(link), | |
2260 | LOG_NETDEV_INTERFACE(link->network->bridge), | |
2261 | LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname)); | |
2262 | link_enter_failed(link); | |
2263 | return r; | |
2264 | } | |
2265 | } | |
2266 | ||
2267 | if (link->network->vrf) { | |
2268 | log_struct(LOG_DEBUG, | |
2269 | LOG_LINK_INTERFACE(link), | |
2270 | LOG_NETDEV_INTERFACE(link->network->vrf), | |
2271 | LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname)); | |
2272 | ||
2273 | link->enslaving++; | |
2274 | ||
2275 | r = netdev_join(link->network->vrf, link, netdev_join_handler); | |
2276 | if (r < 0) { | |
2277 | log_struct_errno(LOG_WARNING, r, | |
2278 | LOG_LINK_INTERFACE(link), | |
2279 | LOG_NETDEV_INTERFACE(link->network->vrf), | |
2280 | LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname)); | |
2281 | link_enter_failed(link); | |
2282 | return r; | |
2283 | } | |
2284 | } | |
2285 | ||
2286 | HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) { | |
2287 | ||
2288 | if (netdev->ifindex > 0) | |
2289 | /* Assume already enslaved. */ | |
2290 | continue; | |
2291 | ||
2292 | if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED) | |
2293 | continue; | |
2294 | ||
2295 | log_struct(LOG_DEBUG, | |
2296 | LOG_LINK_INTERFACE(link), | |
2297 | LOG_NETDEV_INTERFACE(netdev), | |
2298 | LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname)); | |
2299 | ||
2300 | link->enslaving++; | |
2301 | ||
2302 | r = netdev_join(netdev, link, netdev_join_handler); | |
2303 | if (r < 0) { | |
2304 | log_struct_errno(LOG_WARNING, r, | |
2305 | LOG_LINK_INTERFACE(link), | |
2306 | LOG_NETDEV_INTERFACE(netdev), | |
2307 | LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname)); | |
2308 | link_enter_failed(link); | |
2309 | return r; | |
2310 | } | |
2311 | } | |
2312 | ||
2313 | if (link->enslaving == 0) | |
2314 | return link_joined(link); | |
2315 | ||
2316 | return 0; | |
2317 | } | |
2318 | ||
2319 | static int link_set_ipv4_forward(Link *link) { | |
2320 | int r; | |
2321 | ||
2322 | if (!link_ipv4_forward_enabled(link)) | |
2323 | return 0; | |
2324 | ||
2325 | /* We propagate the forwarding flag from one interface to the | |
2326 | * global setting one way. This means: as long as at least one | |
2327 | * interface was configured at any time that had IP forwarding | |
2328 | * enabled the setting will stay on for good. We do this | |
2329 | * primarily to keep IPv4 and IPv6 packet forwarding behaviour | |
2330 | * somewhat in sync (see below). */ | |
2331 | ||
2332 | r = sysctl_write_ip_property(AF_INET, NULL, "ip_forward", "1"); | |
2333 | if (r < 0) | |
2334 | log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m"); | |
2335 | ||
2336 | return 0; | |
2337 | } | |
2338 | ||
2339 | static int link_set_ipv6_forward(Link *link) { | |
2340 | int r; | |
2341 | ||
2342 | if (!link_ipv6_forward_enabled(link)) | |
2343 | return 0; | |
2344 | ||
2345 | /* On Linux, the IPv6 stack does not know a per-interface | |
2346 | * packet forwarding setting: either packet forwarding is on | |
2347 | * for all, or off for all. We hence don't bother with a | |
2348 | * per-interface setting, but simply propagate the interface | |
2349 | * flag, if it is set, to the global flag, one-way. Note that | |
2350 | * while IPv4 would allow a per-interface flag, we expose the | |
2351 | * same behaviour there and also propagate the setting from | |
2352 | * one to all, to keep things simple (see above). */ | |
2353 | ||
2354 | r = sysctl_write_ip_property(AF_INET6, "all", "forwarding", "1"); | |
2355 | if (r < 0) | |
2356 | log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m"); | |
2357 | ||
2358 | return 0; | |
2359 | } | |
2360 | ||
2361 | static int link_set_ipv6_privacy_extensions(Link *link) { | |
2362 | IPv6PrivacyExtensions s; | |
2363 | int r; | |
2364 | ||
2365 | s = link_ipv6_privacy_extensions(link); | |
2366 | if (s < 0) | |
2367 | return 0; | |
2368 | ||
2369 | r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "use_tempaddr", (int) link->network->ipv6_privacy_extensions); | |
2370 | if (r < 0) | |
2371 | log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m"); | |
2372 | ||
2373 | return 0; | |
2374 | } | |
2375 | ||
2376 | static int link_set_ipv6_accept_ra(Link *link) { | |
2377 | int r; | |
2378 | ||
2379 | /* Make this a NOP if IPv6 is not available */ | |
2380 | if (!socket_ipv6_is_supported()) | |
2381 | return 0; | |
2382 | ||
2383 | if (link->flags & IFF_LOOPBACK) | |
2384 | return 0; | |
2385 | ||
2386 | if (!link->network) | |
2387 | return 0; | |
2388 | ||
2389 | r = sysctl_write_ip_property(AF_INET6, link->ifname, "accept_ra", "0"); | |
2390 | if (r < 0) | |
2391 | log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m"); | |
2392 | ||
2393 | return 0; | |
2394 | } | |
2395 | ||
2396 | static int link_set_ipv6_dad_transmits(Link *link) { | |
2397 | int r; | |
2398 | ||
2399 | /* Make this a NOP if IPv6 is not available */ | |
2400 | if (!socket_ipv6_is_supported()) | |
2401 | return 0; | |
2402 | ||
2403 | if (link->flags & IFF_LOOPBACK) | |
2404 | return 0; | |
2405 | ||
2406 | if (!link->network) | |
2407 | return 0; | |
2408 | ||
2409 | if (link->network->ipv6_dad_transmits < 0) | |
2410 | return 0; | |
2411 | ||
2412 | r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "dad_transmits", link->network->ipv6_dad_transmits); | |
2413 | if (r < 0) | |
2414 | log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m"); | |
2415 | ||
2416 | return 0; | |
2417 | } | |
2418 | ||
2419 | static int link_set_ipv6_hop_limit(Link *link) { | |
2420 | int r; | |
2421 | ||
2422 | /* Make this a NOP if IPv6 is not available */ | |
2423 | if (!socket_ipv6_is_supported()) | |
2424 | return 0; | |
2425 | ||
2426 | if (link->flags & IFF_LOOPBACK) | |
2427 | return 0; | |
2428 | ||
2429 | if (!link->network) | |
2430 | return 0; | |
2431 | ||
2432 | if (link->network->ipv6_hop_limit < 0) | |
2433 | return 0; | |
2434 | ||
2435 | r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "hop_limit", link->network->ipv6_hop_limit); | |
2436 | if (r < 0) | |
2437 | log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m"); | |
2438 | ||
2439 | return 0; | |
2440 | } | |
2441 | ||
2442 | static int link_set_ipv6_mtu(Link *link) { | |
2443 | int r; | |
2444 | ||
2445 | /* Make this a NOP if IPv6 is not available */ | |
2446 | if (!socket_ipv6_is_supported()) | |
2447 | return 0; | |
2448 | ||
2449 | if (link->flags & IFF_LOOPBACK) | |
2450 | return 0; | |
2451 | ||
2452 | if (link->network->ipv6_mtu == 0) | |
2453 | return 0; | |
2454 | ||
2455 | r = sysctl_write_ip_property_uint32(AF_INET6, link->ifname, "mtu", link->network->ipv6_mtu); | |
2456 | if (r < 0) | |
2457 | log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m"); | |
2458 | ||
2459 | return 0; | |
2460 | } | |
2461 | ||
2462 | static bool link_is_static_address_configured(Link *link, Address *address) { | |
2463 | Address *net_address; | |
2464 | ||
2465 | assert(link); | |
2466 | assert(address); | |
2467 | ||
2468 | if (!link->network) | |
2469 | return false; | |
2470 | ||
2471 | LIST_FOREACH(addresses, net_address, link->network->static_addresses) | |
2472 | if (address_equal(net_address, address)) | |
2473 | return true; | |
2474 | ||
2475 | return false; | |
2476 | } | |
2477 | ||
2478 | static bool link_is_static_route_configured(Link *link, Route *route) { | |
2479 | Route *net_route; | |
2480 | ||
2481 | assert(link); | |
2482 | assert(route); | |
2483 | ||
2484 | if (!link->network) | |
2485 | return false; | |
2486 | ||
2487 | LIST_FOREACH(routes, net_route, link->network->static_routes) | |
2488 | if (route_equal(net_route, route)) | |
2489 | return true; | |
2490 | ||
2491 | return false; | |
2492 | } | |
2493 | ||
2494 | static bool link_address_is_dynamic(Link *link, Address *address) { | |
2495 | Route *route; | |
2496 | Iterator i; | |
2497 | ||
2498 | assert(link); | |
2499 | assert(address); | |
2500 | ||
2501 | if (address->cinfo.ifa_prefered != CACHE_INFO_INFINITY_LIFE_TIME) | |
2502 | return true; | |
2503 | ||
2504 | /* Even when the address is leased from a DHCP server, networkd assign the address | |
2505 | * without lifetime when KeepConfiguration=dhcp. So, let's check that we have | |
2506 | * corresponding routes with RTPROT_DHCP. */ | |
2507 | SET_FOREACH(route, link->routes_foreign, i) { | |
2508 | if (route->protocol != RTPROT_DHCP) | |
2509 | continue; | |
2510 | ||
2511 | if (address->family != route->family) | |
2512 | continue; | |
2513 | ||
2514 | if (in_addr_equal(address->family, &address->in_addr, &route->prefsrc)) | |
2515 | return true; | |
2516 | } | |
2517 | ||
2518 | return false; | |
2519 | } | |
2520 | ||
2521 | static int link_drop_foreign_config(Link *link) { | |
2522 | Address *address; | |
2523 | Route *route; | |
2524 | Iterator i; | |
2525 | int r; | |
2526 | ||
2527 | SET_FOREACH(address, link->addresses_foreign, i) { | |
2528 | /* we consider IPv6LL addresses to be managed by the kernel */ | |
2529 | if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1) | |
2530 | continue; | |
2531 | ||
2532 | if (link_address_is_dynamic(link, address)) { | |
2533 | if (FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP)) | |
2534 | continue; | |
2535 | } else if (FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_STATIC)) | |
2536 | continue; | |
2537 | ||
2538 | if (link_is_static_address_configured(link, address)) { | |
2539 | r = address_add(link, address->family, &address->in_addr, address->prefixlen, NULL); | |
2540 | if (r < 0) | |
2541 | return log_link_error_errno(link, r, "Failed to add address: %m"); | |
2542 | } else { | |
2543 | r = address_remove(address, link, NULL); | |
2544 | if (r < 0) | |
2545 | return r; | |
2546 | } | |
2547 | } | |
2548 | ||
2549 | SET_FOREACH(route, link->routes_foreign, i) { | |
2550 | /* do not touch routes managed by the kernel */ | |
2551 | if (route->protocol == RTPROT_KERNEL) | |
2552 | continue; | |
2553 | ||
2554 | if (route->protocol == RTPROT_STATIC && | |
2555 | FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_STATIC)) | |
2556 | continue; | |
2557 | ||
2558 | if (route->protocol == RTPROT_DHCP && | |
2559 | FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP)) | |
2560 | continue; | |
2561 | ||
2562 | if (link_is_static_route_configured(link, route)) { | |
2563 | r = route_add(link, route->family, &route->dst, route->dst_prefixlen, route->tos, route->priority, route->table, NULL); | |
2564 | if (r < 0) | |
2565 | return r; | |
2566 | } else { | |
2567 | r = route_remove(route, link, NULL); | |
2568 | if (r < 0) | |
2569 | return r; | |
2570 | } | |
2571 | } | |
2572 | ||
2573 | return 0; | |
2574 | } | |
2575 | ||
2576 | static int link_drop_config(Link *link) { | |
2577 | Address *address, *pool_address; | |
2578 | Route *route; | |
2579 | Iterator i; | |
2580 | int r; | |
2581 | ||
2582 | SET_FOREACH(address, link->addresses, i) { | |
2583 | /* we consider IPv6LL addresses to be managed by the kernel */ | |
2584 | if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1) | |
2585 | continue; | |
2586 | ||
2587 | r = address_remove(address, link, NULL); | |
2588 | if (r < 0) | |
2589 | return r; | |
2590 | ||
2591 | /* If this address came from an address pool, clean up the pool */ | |
2592 | LIST_FOREACH(addresses, pool_address, link->pool_addresses) { | |
2593 | if (address_equal(address, pool_address)) { | |
2594 | LIST_REMOVE(addresses, link->pool_addresses, pool_address); | |
2595 | address_free(pool_address); | |
2596 | break; | |
2597 | } | |
2598 | } | |
2599 | } | |
2600 | ||
2601 | SET_FOREACH(route, link->routes, i) { | |
2602 | /* do not touch routes managed by the kernel */ | |
2603 | if (route->protocol == RTPROT_KERNEL) | |
2604 | continue; | |
2605 | ||
2606 | r = route_remove(route, link, NULL); | |
2607 | if (r < 0) | |
2608 | return r; | |
2609 | } | |
2610 | ||
2611 | ndisc_flush(link); | |
2612 | ||
2613 | return 0; | |
2614 | } | |
2615 | ||
2616 | static int link_configure(Link *link) { | |
2617 | int r; | |
2618 | ||
2619 | assert(link); | |
2620 | assert(link->network); | |
2621 | assert(link->state == LINK_STATE_INITIALIZED); | |
2622 | ||
2623 | if (STRPTR_IN_SET(link->kind, "can", "vcan", "vxcan")) | |
2624 | return link_configure_can(link); | |
2625 | ||
2626 | /* Drop foreign config, but ignore loopback or critical devices. | |
2627 | * We do not want to remove loopback address or addresses used for root NFS. */ | |
2628 | if (!(link->flags & IFF_LOOPBACK) && | |
2629 | link->network->keep_configuration != KEEP_CONFIGURATION_YES) { | |
2630 | r = link_drop_foreign_config(link); | |
2631 | if (r < 0) | |
2632 | return r; | |
2633 | } | |
2634 | ||
2635 | r = link_set_proxy_arp(link); | |
2636 | if (r < 0) | |
2637 | return r; | |
2638 | ||
2639 | r = ipv6_proxy_ndp_addresses_configure(link); | |
2640 | if (r < 0) | |
2641 | return r; | |
2642 | ||
2643 | r = link_set_ipv4_forward(link); | |
2644 | if (r < 0) | |
2645 | return r; | |
2646 | ||
2647 | r = link_set_ipv6_forward(link); | |
2648 | if (r < 0) | |
2649 | return r; | |
2650 | ||
2651 | r = link_set_ipv6_privacy_extensions(link); | |
2652 | if (r < 0) | |
2653 | return r; | |
2654 | ||
2655 | r = link_set_ipv6_accept_ra(link); | |
2656 | if (r < 0) | |
2657 | return r; | |
2658 | ||
2659 | r = link_set_ipv6_dad_transmits(link); | |
2660 | if (r < 0) | |
2661 | return r; | |
2662 | ||
2663 | r = link_set_ipv6_hop_limit(link); | |
2664 | if (r < 0) | |
2665 | return r; | |
2666 | ||
2667 | r = link_set_flags(link); | |
2668 | if (r < 0) | |
2669 | return r; | |
2670 | ||
2671 | r = link_set_ipv6_mtu(link); | |
2672 | if (r < 0) | |
2673 | return r; | |
2674 | ||
2675 | if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) { | |
2676 | r = ipv4ll_configure(link); | |
2677 | if (r < 0) | |
2678 | return r; | |
2679 | } | |
2680 | ||
2681 | if (link_dhcp4_enabled(link)) { | |
2682 | r = dhcp4_set_promote_secondaries(link); | |
2683 | if (r < 0) | |
2684 | return r; | |
2685 | ||
2686 | r = dhcp4_configure(link); | |
2687 | if (r < 0) | |
2688 | return r; | |
2689 | } | |
2690 | ||
2691 | if (link_dhcp4_server_enabled(link)) { | |
2692 | r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex); | |
2693 | if (r < 0) | |
2694 | return r; | |
2695 | ||
2696 | r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0); | |
2697 | if (r < 0) | |
2698 | return r; | |
2699 | } | |
2700 | ||
2701 | if (link_dhcp6_enabled(link) || | |
2702 | link_ipv6_accept_ra_enabled(link)) { | |
2703 | r = dhcp6_configure(link); | |
2704 | if (r < 0) | |
2705 | return r; | |
2706 | } | |
2707 | ||
2708 | if (link_ipv6_accept_ra_enabled(link)) { | |
2709 | r = ndisc_configure(link); | |
2710 | if (r < 0) | |
2711 | return r; | |
2712 | } | |
2713 | ||
2714 | if (link_radv_enabled(link)) { | |
2715 | r = radv_configure(link); | |
2716 | if (r < 0) | |
2717 | return r; | |
2718 | } | |
2719 | ||
2720 | if (link_lldp_rx_enabled(link)) { | |
2721 | r = link_lldp_rx_configure(link); | |
2722 | if (r < 0) | |
2723 | return r; | |
2724 | } | |
2725 | ||
2726 | r = link_configure_mtu(link); | |
2727 | if (r < 0) | |
2728 | return r; | |
2729 | ||
2730 | r = link_configure_addrgen_mode(link); | |
2731 | if (r < 0) | |
2732 | return r; | |
2733 | ||
2734 | return link_configure_after_setting_mtu(link); | |
2735 | } | |
2736 | ||
2737 | static int link_configure_after_setting_mtu(Link *link) { | |
2738 | int r; | |
2739 | ||
2740 | assert(link); | |
2741 | assert(link->network); | |
2742 | assert(link->state == LINK_STATE_INITIALIZED); | |
2743 | ||
2744 | if (link->setting_mtu) | |
2745 | return 0; | |
2746 | ||
2747 | if (link_has_carrier(link) || link->network->configure_without_carrier) { | |
2748 | r = link_acquire_conf(link); | |
2749 | if (r < 0) | |
2750 | return r; | |
2751 | } | |
2752 | ||
2753 | return link_enter_join_netdev(link); | |
2754 | } | |
2755 | ||
2756 | static int duid_set_uuid(DUID *duid, sd_id128_t uuid) { | |
2757 | assert(duid); | |
2758 | ||
2759 | if (duid->raw_data_len > 0) | |
2760 | return 0; | |
2761 | ||
2762 | if (duid->type != DUID_TYPE_UUID) | |
2763 | return -EINVAL; | |
2764 | ||
2765 | memcpy(&duid->raw_data, &uuid, sizeof(sd_id128_t)); | |
2766 | duid->raw_data_len = sizeof(sd_id128_t); | |
2767 | ||
2768 | return 1; | |
2769 | } | |
2770 | ||
2771 | int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) { | |
2772 | Manager *manager = userdata; | |
2773 | const sd_bus_error *e; | |
2774 | const void *a; | |
2775 | size_t sz; | |
2776 | DUID *duid; | |
2777 | Link *link; | |
2778 | int r; | |
2779 | ||
2780 | assert(m); | |
2781 | assert(manager); | |
2782 | ||
2783 | e = sd_bus_message_get_error(m); | |
2784 | if (e) { | |
2785 | log_error_errno(sd_bus_error_get_errno(e), | |
2786 | "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s", | |
2787 | e->message); | |
2788 | goto configure; | |
2789 | } | |
2790 | ||
2791 | r = sd_bus_message_read_array(m, 'y', &a, &sz); | |
2792 | if (r < 0) | |
2793 | goto configure; | |
2794 | ||
2795 | if (sz != sizeof(sd_id128_t)) { | |
2796 | log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID."); | |
2797 | goto configure; | |
2798 | } | |
2799 | ||
2800 | memcpy(&manager->product_uuid, a, sz); | |
2801 | while ((duid = set_steal_first(manager->duids_requesting_uuid))) | |
2802 | (void) duid_set_uuid(duid, manager->product_uuid); | |
2803 | ||
2804 | manager->duids_requesting_uuid = set_free(manager->duids_requesting_uuid); | |
2805 | ||
2806 | configure: | |
2807 | while ((link = set_steal_first(manager->links_requesting_uuid))) { | |
2808 | r = link_configure(link); | |
2809 | if (r < 0) | |
2810 | log_link_error_errno(link, r, "Failed to configure link: %m"); | |
2811 | } | |
2812 | ||
2813 | manager->links_requesting_uuid = set_free(manager->links_requesting_uuid); | |
2814 | ||
2815 | /* To avoid calling GetProductUUID() bus method so frequently, set the flag below | |
2816 | * even if the method fails. */ | |
2817 | manager->has_product_uuid = true; | |
2818 | ||
2819 | return 1; | |
2820 | } | |
2821 | ||
2822 | static bool link_requires_uuid(Link *link) { | |
2823 | const DUID *duid; | |
2824 | ||
2825 | assert(link); | |
2826 | assert(link->manager); | |
2827 | assert(link->network); | |
2828 | ||
2829 | duid = link_get_duid(link); | |
2830 | if (duid->type != DUID_TYPE_UUID || duid->raw_data_len != 0) | |
2831 | return false; | |
2832 | ||
2833 | if (link_dhcp4_enabled(link) && IN_SET(link->network->dhcp_client_identifier, DHCP_CLIENT_ID_DUID, DHCP_CLIENT_ID_DUID_ONLY)) | |
2834 | return true; | |
2835 | ||
2836 | if (link_dhcp6_enabled(link) || link_ipv6_accept_ra_enabled(link)) | |
2837 | return true; | |
2838 | ||
2839 | return false; | |
2840 | } | |
2841 | ||
2842 | static int link_configure_duid(Link *link) { | |
2843 | Manager *m; | |
2844 | DUID *duid; | |
2845 | int r; | |
2846 | ||
2847 | assert(link); | |
2848 | assert(link->manager); | |
2849 | assert(link->network); | |
2850 | ||
2851 | m = link->manager; | |
2852 | duid = link_get_duid(link); | |
2853 | ||
2854 | if (!link_requires_uuid(link)) | |
2855 | return 1; | |
2856 | ||
2857 | if (m->has_product_uuid) { | |
2858 | (void) duid_set_uuid(duid, m->product_uuid); | |
2859 | return 1; | |
2860 | } | |
2861 | ||
2862 | if (!m->links_requesting_uuid) { | |
2863 | r = manager_request_product_uuid(m, link); | |
2864 | if (r < 0) { | |
2865 | if (r == -ENOMEM) | |
2866 | return r; | |
2867 | ||
2868 | log_link_warning_errno(link, r, | |
2869 | "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m"); | |
2870 | return 1; | |
2871 | } | |
2872 | } else { | |
2873 | r = set_put(m->links_requesting_uuid, link); | |
2874 | if (r < 0) | |
2875 | return log_oom(); | |
2876 | ||
2877 | r = set_put(m->duids_requesting_uuid, duid); | |
2878 | if (r < 0) | |
2879 | return log_oom(); | |
2880 | } | |
2881 | ||
2882 | return 0; | |
2883 | } | |
2884 | ||
2885 | static int link_initialized_and_synced(Link *link) { | |
2886 | Network *network; | |
2887 | int r; | |
2888 | ||
2889 | assert(link); | |
2890 | assert(link->ifname); | |
2891 | assert(link->manager); | |
2892 | ||
2893 | /* We may get called either from the asynchronous netlink callback, | |
2894 | * or directly for link_add() if running in a container. See link_add(). */ | |
2895 | if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) | |
2896 | return 0; | |
2897 | ||
2898 | log_link_debug(link, "Link state is up-to-date"); | |
2899 | link_set_state(link, LINK_STATE_INITIALIZED); | |
2900 | ||
2901 | r = link_new_bound_by_list(link); | |
2902 | if (r < 0) | |
2903 | return r; | |
2904 | ||
2905 | r = link_handle_bound_by_list(link); | |
2906 | if (r < 0) | |
2907 | return r; | |
2908 | ||
2909 | if (!link->network) { | |
2910 | r = network_get(link->manager, link->sd_device, link->ifname, | |
2911 | &link->mac, &network); | |
2912 | if (r == -ENOENT) { | |
2913 | link_enter_unmanaged(link); | |
2914 | return 0; | |
2915 | } else if (r == 0 && network->unmanaged) { | |
2916 | link_enter_unmanaged(link); | |
2917 | return 0; | |
2918 | } else if (r < 0) | |
2919 | return r; | |
2920 | ||
2921 | if (link->flags & IFF_LOOPBACK) { | |
2922 | if (network->link_local != ADDRESS_FAMILY_NO) | |
2923 | log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link"); | |
2924 | ||
2925 | if (network->dhcp != ADDRESS_FAMILY_NO) | |
2926 | log_link_debug(link, "Ignoring DHCP clients for loopback link"); | |
2927 | ||
2928 | if (network->dhcp_server) | |
2929 | log_link_debug(link, "Ignoring DHCP server for loopback link"); | |
2930 | } | |
2931 | ||
2932 | r = network_apply(network, link); | |
2933 | if (r < 0) | |
2934 | return r; | |
2935 | } | |
2936 | ||
2937 | r = link_new_bound_to_list(link); | |
2938 | if (r < 0) | |
2939 | return r; | |
2940 | ||
2941 | /* link_configure_duid() returns 0 if it requests product UUID. In that case, | |
2942 | * link_configure() is called later asynchronously. */ | |
2943 | r = link_configure_duid(link); | |
2944 | if (r <= 0) | |
2945 | return r; | |
2946 | ||
2947 | r = link_configure(link); | |
2948 | if (r < 0) | |
2949 | return r; | |
2950 | ||
2951 | return 0; | |
2952 | } | |
2953 | ||
2954 | static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { | |
2955 | (void) link_initialized_and_synced(link); | |
2956 | return 1; | |
2957 | } | |
2958 | ||
2959 | int link_initialized(Link *link, sd_device *device) { | |
2960 | _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL; | |
2961 | int r; | |
2962 | ||
2963 | assert(link); | |
2964 | assert(link->manager); | |
2965 | assert(link->manager->rtnl); | |
2966 | assert(device); | |
2967 | ||
2968 | if (link->state != LINK_STATE_PENDING) | |
2969 | return 0; | |
2970 | ||
2971 | if (link->sd_device) | |
2972 | return 0; | |
2973 | ||
2974 | log_link_debug(link, "udev initialized link"); | |
2975 | link_set_state(link, LINK_STATE_INITIALIZED); | |
2976 | ||
2977 | link->sd_device = sd_device_ref(device); | |
2978 | ||
2979 | /* udev has initialized the link, but we don't know if we have yet | |
2980 | * processed the NEWLINK messages with the latest state. Do a GETLINK, | |
2981 | * when it returns we know that the pending NEWLINKs have already been | |
2982 | * processed and that we are up-to-date */ | |
2983 | ||
2984 | r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK, | |
2985 | link->ifindex); | |
2986 | if (r < 0) | |
2987 | return r; | |
2988 | ||
2989 | r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler, | |
2990 | link_netlink_destroy_callback, link); | |
2991 | if (r < 0) | |
2992 | return r; | |
2993 | ||
2994 | link_ref(link); | |
2995 | ||
2996 | return 0; | |
2997 | } | |
2998 | ||
2999 | static int link_load(Link *link) { | |
3000 | _cleanup_free_ char *network_file = NULL, | |
3001 | *addresses = NULL, | |
3002 | *routes = NULL, | |
3003 | *dhcp4_address = NULL, | |
3004 | *ipv4ll_address = NULL; | |
3005 | union in_addr_union address; | |
3006 | union in_addr_union route_dst; | |
3007 | const char *p; | |
3008 | int r; | |
3009 | ||
3010 | assert(link); | |
3011 | ||
3012 | r = parse_env_file(NULL, link->state_file, | |
3013 | "NETWORK_FILE", &network_file, | |
3014 | "ADDRESSES", &addresses, | |
3015 | "ROUTES", &routes, | |
3016 | "DHCP4_ADDRESS", &dhcp4_address, | |
3017 | "IPV4LL_ADDRESS", &ipv4ll_address); | |
3018 | if (r < 0 && r != -ENOENT) | |
3019 | return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file); | |
3020 | ||
3021 | if (network_file) { | |
3022 | Network *network; | |
3023 | char *suffix; | |
3024 | ||
3025 | /* drop suffix */ | |
3026 | suffix = strrchr(network_file, '.'); | |
3027 | if (!suffix) { | |
3028 | log_link_debug(link, "Failed to get network name from %s", network_file); | |
3029 | goto network_file_fail; | |
3030 | } | |
3031 | *suffix = '\0'; | |
3032 | ||
3033 | r = network_get_by_name(link->manager, basename(network_file), &network); | |
3034 | if (r < 0) { | |
3035 | log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file)); | |
3036 | goto network_file_fail; | |
3037 | } | |
3038 | ||
3039 | r = network_apply(network, link); | |
3040 | if (r < 0) | |
3041 | return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file)); | |
3042 | } | |
3043 | ||
3044 | network_file_fail: | |
3045 | ||
3046 | if (addresses) { | |
3047 | p = addresses; | |
3048 | ||
3049 | for (;;) { | |
3050 | _cleanup_free_ char *address_str = NULL; | |
3051 | char *prefixlen_str; | |
3052 | int family; | |
3053 | unsigned char prefixlen; | |
3054 | ||
3055 | r = extract_first_word(&p, &address_str, NULL, 0); | |
3056 | if (r < 0) { | |
3057 | log_link_debug_errno(link, r, "Failed to extract next address string: %m"); | |
3058 | continue; | |
3059 | } | |
3060 | if (r == 0) | |
3061 | break; | |
3062 | ||
3063 | prefixlen_str = strchr(address_str, '/'); | |
3064 | if (!prefixlen_str) { | |
3065 | log_link_debug(link, "Failed to parse address and prefix length %s", address_str); | |
3066 | continue; | |
3067 | } | |
3068 | ||
3069 | *prefixlen_str++ = '\0'; | |
3070 | ||
3071 | r = sscanf(prefixlen_str, "%hhu", &prefixlen); | |
3072 | if (r != 1) { | |
3073 | log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str); | |
3074 | continue; | |
3075 | } | |
3076 | ||
3077 | r = in_addr_from_string_auto(address_str, &family, &address); | |
3078 | if (r < 0) { | |
3079 | log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str); | |
3080 | continue; | |
3081 | } | |
3082 | ||
3083 | r = address_add(link, family, &address, prefixlen, NULL); | |
3084 | if (r < 0) | |
3085 | return log_link_error_errno(link, r, "Failed to add address: %m"); | |
3086 | } | |
3087 | } | |
3088 | ||
3089 | if (routes) { | |
3090 | p = routes; | |
3091 | ||
3092 | for (;;) { | |
3093 | Route *route; | |
3094 | _cleanup_free_ char *route_str = NULL; | |
3095 | _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL; | |
3096 | usec_t lifetime; | |
3097 | char *prefixlen_str; | |
3098 | int family; | |
3099 | unsigned char prefixlen, tos, table; | |
3100 | uint32_t priority; | |
3101 | ||
3102 | r = extract_first_word(&p, &route_str, NULL, 0); | |
3103 | if (r < 0) { | |
3104 | log_link_debug_errno(link, r, "Failed to extract next route string: %m"); | |
3105 | continue; | |
3106 | } | |
3107 | if (r == 0) | |
3108 | break; | |
3109 | ||
3110 | prefixlen_str = strchr(route_str, '/'); | |
3111 | if (!prefixlen_str) { | |
3112 | log_link_debug(link, "Failed to parse route %s", route_str); | |
3113 | continue; | |
3114 | } | |
3115 | ||
3116 | *prefixlen_str++ = '\0'; | |
3117 | ||
3118 | r = sscanf(prefixlen_str, "%hhu/%hhu/%"SCNu32"/%hhu/"USEC_FMT, &prefixlen, &tos, &priority, &table, &lifetime); | |
3119 | if (r != 5) { | |
3120 | log_link_debug(link, | |
3121 | "Failed to parse destination prefix length, tos, priority, table or expiration %s", | |
3122 | prefixlen_str); | |
3123 | continue; | |
3124 | } | |
3125 | ||
3126 | r = in_addr_from_string_auto(route_str, &family, &route_dst); | |
3127 | if (r < 0) { | |
3128 | log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str); | |
3129 | continue; | |
3130 | } | |
3131 | ||
3132 | r = route_add(link, family, &route_dst, prefixlen, tos, priority, table, &route); | |
3133 | if (r < 0) | |
3134 | return log_link_error_errno(link, r, "Failed to add route: %m"); | |
3135 | ||
3136 | if (lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) { | |
3137 | r = sd_event_add_time(link->manager->event, &expire, clock_boottime_or_monotonic(), lifetime, | |
3138 | 0, route_expire_handler, route); | |
3139 | if (r < 0) | |
3140 | log_link_warning_errno(link, r, "Could not arm route expiration handler: %m"); | |
3141 | } | |
3142 | ||
3143 | route->lifetime = lifetime; | |
3144 | sd_event_source_unref(route->expire); | |
3145 | route->expire = TAKE_PTR(expire); | |
3146 | } | |
3147 | } | |
3148 | ||
3149 | if (dhcp4_address) { | |
3150 | r = in_addr_from_string(AF_INET, dhcp4_address, &address); | |
3151 | if (r < 0) { | |
3152 | log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address); | |
3153 | goto dhcp4_address_fail; | |
3154 | } | |
3155 | ||
3156 | r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0); | |
3157 | if (r < 0) | |
3158 | return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m"); | |
3159 | ||
3160 | r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in); | |
3161 | if (r < 0) | |
3162 | return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address); | |
3163 | } | |
3164 | ||
3165 | dhcp4_address_fail: | |
3166 | ||
3167 | if (ipv4ll_address) { | |
3168 | r = in_addr_from_string(AF_INET, ipv4ll_address, &address); | |
3169 | if (r < 0) { | |
3170 | log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address); | |
3171 | goto ipv4ll_address_fail; | |
3172 | } | |
3173 | ||
3174 | r = sd_ipv4ll_new(&link->ipv4ll); | |
3175 | if (r < 0) | |
3176 | return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m"); | |
3177 | ||
3178 | r = sd_ipv4ll_set_address(link->ipv4ll, &address.in); | |
3179 | if (r < 0) | |
3180 | return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address); | |
3181 | } | |
3182 | ||
3183 | ipv4ll_address_fail: | |
3184 | ||
3185 | return 0; | |
3186 | } | |
3187 | ||
3188 | int link_add(Manager *m, sd_netlink_message *message, Link **ret) { | |
3189 | _cleanup_(sd_device_unrefp) sd_device *device = NULL; | |
3190 | char ifindex_str[2 + DECIMAL_STR_MAX(int)]; | |
3191 | Link *link; | |
3192 | int r; | |
3193 | ||
3194 | assert(m); | |
3195 | assert(m->rtnl); | |
3196 | assert(message); | |
3197 | assert(ret); | |
3198 | ||
3199 | r = link_new(m, message, ret); | |
3200 | if (r < 0) | |
3201 | return r; | |
3202 | ||
3203 | link = *ret; | |
3204 | ||
3205 | log_link_debug(link, "Link %d added", link->ifindex); | |
3206 | ||
3207 | r = link_load(link); | |
3208 | if (r < 0) | |
3209 | return r; | |
3210 | ||
3211 | if (detect_container() <= 0) { | |
3212 | /* not in a container, udev will be around */ | |
3213 | sprintf(ifindex_str, "n%d", link->ifindex); | |
3214 | r = sd_device_new_from_device_id(&device, ifindex_str); | |
3215 | if (r < 0) { | |
3216 | log_link_warning_errno(link, r, "Could not find device: %m"); | |
3217 | goto failed; | |
3218 | } | |
3219 | ||
3220 | r = sd_device_get_is_initialized(device); | |
3221 | if (r < 0) { | |
3222 | log_link_warning_errno(link, r, "Could not determine whether the device is initialized or not: %m"); | |
3223 | goto failed; | |
3224 | } | |
3225 | if (r == 0) { | |
3226 | /* not yet ready */ | |
3227 | log_link_debug(link, "link pending udev initialization..."); | |
3228 | return 0; | |
3229 | } | |
3230 | ||
3231 | r = device_is_renaming(device); | |
3232 | if (r < 0) { | |
3233 | log_link_warning_errno(link, r, "Failed to determine the device is renamed or not: %m"); | |
3234 | goto failed; | |
3235 | } | |
3236 | if (r > 0) { | |
3237 | log_link_debug(link, "Interface is under renaming, pending initialization."); | |
3238 | return 0; | |
3239 | } | |
3240 | ||
3241 | r = link_initialized(link, device); | |
3242 | if (r < 0) | |
3243 | goto failed; | |
3244 | } else { | |
3245 | r = link_initialized_and_synced(link); | |
3246 | if (r < 0) | |
3247 | goto failed; | |
3248 | } | |
3249 | ||
3250 | return 0; | |
3251 | failed: | |
3252 | link_enter_failed(link); | |
3253 | return r; | |
3254 | } | |
3255 | ||
3256 | int link_ipv6ll_gained(Link *link, const struct in6_addr *address) { | |
3257 | int r; | |
3258 | ||
3259 | assert(link); | |
3260 | ||
3261 | log_link_info(link, "Gained IPv6LL"); | |
3262 | ||
3263 | link->ipv6ll_address = *address; | |
3264 | link_check_ready(link); | |
3265 | ||
3266 | if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) { | |
3267 | r = link_acquire_ipv6_conf(link); | |
3268 | if (r < 0) { | |
3269 | link_enter_failed(link); | |
3270 | return r; | |
3271 | } | |
3272 | } | |
3273 | ||
3274 | return 0; | |
3275 | } | |
3276 | ||
3277 | static int link_carrier_gained(Link *link) { | |
3278 | int r; | |
3279 | ||
3280 | assert(link); | |
3281 | ||
3282 | if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) { | |
3283 | r = link_acquire_conf(link); | |
3284 | if (r < 0) { | |
3285 | link_enter_failed(link); | |
3286 | return r; | |
3287 | } | |
3288 | ||
3289 | r = link_request_set_addresses(link); | |
3290 | if (r < 0) | |
3291 | return r; | |
3292 | } | |
3293 | ||
3294 | r = link_handle_bound_by_list(link); | |
3295 | if (r < 0) | |
3296 | return r; | |
3297 | ||
3298 | return 0; | |
3299 | } | |
3300 | ||
3301 | static int link_carrier_lost(Link *link) { | |
3302 | int r; | |
3303 | ||
3304 | assert(link); | |
3305 | ||
3306 | if (link->network && link->network->ignore_carrier_loss) | |
3307 | return 0; | |
3308 | ||
3309 | /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop. | |
3310 | * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the | |
3311 | * configuration and stop the clients as well. */ | |
3312 | if (link->setting_mtu) | |
3313 | return 0; | |
3314 | ||
3315 | r = link_stop_clients(link, false); | |
3316 | if (r < 0) { | |
3317 | link_enter_failed(link); | |
3318 | return r; | |
3319 | } | |
3320 | ||
3321 | if (link_dhcp4_server_enabled(link)) | |
3322 | (void) sd_dhcp_server_stop(link->dhcp_server); | |
3323 | ||
3324 | r = link_drop_config(link); | |
3325 | if (r < 0) | |
3326 | return r; | |
3327 | ||
3328 | if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING)) { | |
3329 | log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state)); | |
3330 | r = link_drop_foreign_config(link); | |
3331 | if (r < 0) | |
3332 | return r; | |
3333 | } | |
3334 | ||
3335 | r = link_handle_bound_by_list(link); | |
3336 | if (r < 0) | |
3337 | return r; | |
3338 | ||
3339 | return 0; | |
3340 | } | |
3341 | ||
3342 | int link_carrier_reset(Link *link) { | |
3343 | int r; | |
3344 | ||
3345 | assert(link); | |
3346 | ||
3347 | if (link_has_carrier(link)) { | |
3348 | r = link_carrier_lost(link); | |
3349 | if (r < 0) | |
3350 | return r; | |
3351 | ||
3352 | r = link_carrier_gained(link); | |
3353 | if (r < 0) | |
3354 | return r; | |
3355 | ||
3356 | log_link_info(link, "Reset carrier"); | |
3357 | } | |
3358 | ||
3359 | return 0; | |
3360 | } | |
3361 | ||
3362 | int link_update(Link *link, sd_netlink_message *m) { | |
3363 | struct ether_addr mac; | |
3364 | const char *ifname; | |
3365 | uint32_t mtu; | |
3366 | bool had_carrier, carrier_gained, carrier_lost; | |
3367 | int old_master, r; | |
3368 | ||
3369 | assert(link); | |
3370 | assert(link->ifname); | |
3371 | assert(m); | |
3372 | ||
3373 | if (link->state == LINK_STATE_LINGER) { | |
3374 | log_link_info(link, "Link re-added"); | |
3375 | link_set_state(link, LINK_STATE_CONFIGURING); | |
3376 | ||
3377 | r = link_new_carrier_maps(link); | |
3378 | if (r < 0) | |
3379 | return r; | |
3380 | } | |
3381 | ||
3382 | r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname); | |
3383 | if (r >= 0 && !streq(ifname, link->ifname)) { | |
3384 | Manager *manager = link->manager; | |
3385 | ||
3386 | log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname); | |
3387 | ||
3388 | link_drop(link); | |
3389 | r = link_add(manager, m, &link); | |
3390 | if (r < 0) | |
3391 | return r; | |
3392 | } | |
3393 | ||
3394 | r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu); | |
3395 | if (r >= 0 && mtu > 0) { | |
3396 | link->mtu = mtu; | |
3397 | if (link->original_mtu == 0) { | |
3398 | link->original_mtu = mtu; | |
3399 | log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu); | |
3400 | } | |
3401 | ||
3402 | if (link->dhcp_client) { | |
3403 | r = sd_dhcp_client_set_mtu(link->dhcp_client, | |
3404 | link->mtu); | |
3405 | if (r < 0) | |
3406 | return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m"); | |
3407 | } | |
3408 | ||
3409 | if (link->radv) { | |
3410 | r = sd_radv_set_mtu(link->radv, link->mtu); | |
3411 | if (r < 0) | |
3412 | return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m"); | |
3413 | } | |
3414 | } | |
3415 | ||
3416 | /* The kernel may broadcast NEWLINK messages without the MAC address | |
3417 | set, simply ignore them. */ | |
3418 | r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac); | |
3419 | if (r >= 0) { | |
3420 | if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet, | |
3421 | ETH_ALEN)) { | |
3422 | ||
3423 | memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet, | |
3424 | ETH_ALEN); | |
3425 | ||
3426 | log_link_debug(link, "MAC address: " | |
3427 | "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx", | |
3428 | mac.ether_addr_octet[0], | |
3429 | mac.ether_addr_octet[1], | |
3430 | mac.ether_addr_octet[2], | |
3431 | mac.ether_addr_octet[3], | |
3432 | mac.ether_addr_octet[4], | |
3433 | mac.ether_addr_octet[5]); | |
3434 | ||
3435 | if (link->ipv4ll) { | |
3436 | r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac); | |
3437 | if (r < 0) | |
3438 | return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m"); | |
3439 | } | |
3440 | ||
3441 | if (link->dhcp_client) { | |
3442 | r = sd_dhcp_client_set_mac(link->dhcp_client, | |
3443 | (const uint8_t *) &link->mac, | |
3444 | sizeof (link->mac), | |
3445 | ARPHRD_ETHER); | |
3446 | if (r < 0) | |
3447 | return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m"); | |
3448 | ||
3449 | r = dhcp4_set_client_identifier(link); | |
3450 | if (r < 0) | |
3451 | return r; | |
3452 | } | |
3453 | ||
3454 | if (link->dhcp6_client) { | |
3455 | const DUID* duid = link_get_duid(link); | |
3456 | ||
3457 | r = sd_dhcp6_client_set_mac(link->dhcp6_client, | |
3458 | (const uint8_t *) &link->mac, | |
3459 | sizeof (link->mac), | |
3460 | ARPHRD_ETHER); | |
3461 | if (r < 0) | |
3462 | return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m"); | |
3463 | ||
3464 | if (link->network->iaid_set) { | |
3465 | r = sd_dhcp6_client_set_iaid(link->dhcp6_client, | |
3466 | link->network->iaid); | |
3467 | if (r < 0) | |
3468 | return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m"); | |
3469 | } | |
3470 | ||
3471 | r = sd_dhcp6_client_set_duid(link->dhcp6_client, | |
3472 | duid->type, | |
3473 | duid->raw_data_len > 0 ? duid->raw_data : NULL, | |
3474 | duid->raw_data_len); | |
3475 | if (r < 0) | |
3476 | return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m"); | |
3477 | } | |
3478 | ||
3479 | if (link->radv) { | |
3480 | r = sd_radv_set_mac(link->radv, &link->mac); | |
3481 | if (r < 0) | |
3482 | return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m"); | |
3483 | } | |
3484 | ||
3485 | if (link->ndisc) { | |
3486 | r = sd_ndisc_set_mac(link->ndisc, &link->mac); | |
3487 | if (r < 0) | |
3488 | return log_link_warning_errno(link, r, "Could not update MAC for ndisc: %m"); | |
3489 | } | |
3490 | } | |
3491 | } | |
3492 | ||
3493 | old_master = link->master_ifindex; | |
3494 | (void) sd_netlink_message_read_u32(m, IFLA_MASTER, (uint32_t *) &link->master_ifindex); | |
3495 | ||
3496 | had_carrier = link_has_carrier(link); | |
3497 | ||
3498 | r = link_update_flags(link, m, old_master != link->master_ifindex); | |
3499 | if (r < 0) | |
3500 | return r; | |
3501 | ||
3502 | r = link_update_lldp(link); | |
3503 | if (r < 0) | |
3504 | return r; | |
3505 | ||
3506 | carrier_gained = !had_carrier && link_has_carrier(link); | |
3507 | carrier_lost = had_carrier && !link_has_carrier(link); | |
3508 | ||
3509 | if (carrier_gained) { | |
3510 | log_link_info(link, "Gained carrier"); | |
3511 | ||
3512 | r = link_carrier_gained(link); | |
3513 | if (r < 0) | |
3514 | return r; | |
3515 | } else if (carrier_lost) { | |
3516 | log_link_info(link, "Lost carrier"); | |
3517 | ||
3518 | r = link_carrier_lost(link); | |
3519 | if (r < 0) | |
3520 | return r; | |
3521 | } | |
3522 | ||
3523 | return 0; | |
3524 | } | |
3525 | ||
3526 | static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) { | |
3527 | bool space = false; | |
3528 | Iterator i; | |
3529 | Link *link; | |
3530 | ||
3531 | assert(f); | |
3532 | assert(prefix); | |
3533 | ||
3534 | if (hashmap_isempty(h)) | |
3535 | return; | |
3536 | ||
3537 | fputs(prefix, f); | |
3538 | HASHMAP_FOREACH(link, h, i) { | |
3539 | if (space) | |
3540 | fputc(' ', f); | |
3541 | ||
3542 | fprintf(f, "%i", link->ifindex); | |
3543 | space = true; | |
3544 | } | |
3545 | ||
3546 | fputc('\n', f); | |
3547 | } | |
3548 | ||
3549 | int link_save(Link *link) { | |
3550 | _cleanup_free_ char *temp_path = NULL; | |
3551 | _cleanup_fclose_ FILE *f = NULL; | |
3552 | const char *admin_state, *oper_state; | |
3553 | Address *a; | |
3554 | Route *route; | |
3555 | Iterator i; | |
3556 | int r; | |
3557 | ||
3558 | assert(link); | |
3559 | assert(link->state_file); | |
3560 | assert(link->lease_file); | |
3561 | assert(link->manager); | |
3562 | ||
3563 | if (link->state == LINK_STATE_LINGER) { | |
3564 | (void) unlink(link->state_file); | |
3565 | return 0; | |
3566 | } | |
3567 | ||
3568 | link_lldp_save(link); | |
3569 | ||
3570 | admin_state = link_state_to_string(link->state); | |
3571 | assert(admin_state); | |
3572 | ||
3573 | oper_state = link_operstate_to_string(link->operstate); | |
3574 | assert(oper_state); | |
3575 | ||
3576 | r = fopen_temporary(link->state_file, &f, &temp_path); | |
3577 | if (r < 0) | |
3578 | goto fail; | |
3579 | ||
3580 | (void) fchmod(fileno(f), 0644); | |
3581 | ||
3582 | fprintf(f, | |
3583 | "# This is private data. Do not parse.\n" | |
3584 | "ADMIN_STATE=%s\n" | |
3585 | "OPER_STATE=%s\n", | |
3586 | admin_state, oper_state); | |
3587 | ||
3588 | if (link->network) { | |
3589 | char **dhcp6_domains = NULL, **dhcp_domains = NULL; | |
3590 | const char *dhcp_domainname = NULL, *p; | |
3591 | sd_dhcp6_lease *dhcp6_lease = NULL; | |
3592 | unsigned j; | |
3593 | bool space; | |
3594 | ||
3595 | fprintf(f, "REQUIRED_FOR_ONLINE=%s\n", | |
3596 | yes_no(link->network->required_for_online)); | |
3597 | ||
3598 | fprintf(f, "REQUIRED_OPER_STATE_FOR_ONLINE=%s\n", | |
3599 | strempty(link_operstate_to_string(link->network->required_operstate_for_online))); | |
3600 | ||
3601 | if (link->dhcp6_client) { | |
3602 | r = sd_dhcp6_client_get_lease(link->dhcp6_client, &dhcp6_lease); | |
3603 | if (r < 0 && r != -ENOMSG) | |
3604 | log_link_debug(link, "No DHCPv6 lease"); | |
3605 | } | |
3606 | ||
3607 | fprintf(f, "NETWORK_FILE=%s\n", link->network->filename); | |
3608 | ||
3609 | fputs("DNS=", f); | |
3610 | space = false; | |
3611 | ||
3612 | for (j = 0; j < link->network->n_dns; j++) { | |
3613 | _cleanup_free_ char *b = NULL; | |
3614 | ||
3615 | r = in_addr_to_string(link->network->dns[j].family, | |
3616 | &link->network->dns[j].address, &b); | |
3617 | if (r < 0) { | |
3618 | log_debug_errno(r, "Failed to format address, ignoring: %m"); | |
3619 | continue; | |
3620 | } | |
3621 | ||
3622 | if (space) | |
3623 | fputc(' ', f); | |
3624 | fputs(b, f); | |
3625 | space = true; | |
3626 | } | |
3627 | ||
3628 | if (link->network->dhcp_use_dns && | |
3629 | link->dhcp_lease) { | |
3630 | const struct in_addr *addresses; | |
3631 | ||
3632 | r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses); | |
3633 | if (r > 0) | |
3634 | if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0) | |
3635 | space = true; | |
3636 | } | |
3637 | ||
3638 | if (link->network->dhcp_use_dns && dhcp6_lease) { | |
3639 | struct in6_addr *in6_addrs; | |
3640 | ||
3641 | r = sd_dhcp6_lease_get_dns(dhcp6_lease, &in6_addrs); | |
3642 | if (r > 0) { | |
3643 | if (space) | |
3644 | fputc(' ', f); | |
3645 | serialize_in6_addrs(f, in6_addrs, r); | |
3646 | space = true; | |
3647 | } | |
3648 | } | |
3649 | ||
3650 | /* Make sure to flush out old entries before we use the NDISC data */ | |
3651 | ndisc_vacuum(link); | |
3652 | ||
3653 | if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) { | |
3654 | NDiscRDNSS *dd; | |
3655 | ||
3656 | SET_FOREACH(dd, link->ndisc_rdnss, i) { | |
3657 | if (space) | |
3658 | fputc(' ', f); | |
3659 | ||
3660 | serialize_in6_addrs(f, &dd->address, 1); | |
3661 | space = true; | |
3662 | } | |
3663 | } | |
3664 | ||
3665 | fputc('\n', f); | |
3666 | ||
3667 | fputs("NTP=", f); | |
3668 | space = false; | |
3669 | fputstrv(f, link->network->ntp, NULL, &space); | |
3670 | ||
3671 | if (link->network->dhcp_use_ntp && | |
3672 | link->dhcp_lease) { | |
3673 | const struct in_addr *addresses; | |
3674 | ||
3675 | r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses); | |
3676 | if (r > 0) | |
3677 | if (serialize_in_addrs(f, addresses, r, space, in4_addr_is_non_local) > 0) | |
3678 | space = true; | |
3679 | } | |
3680 | ||
3681 | if (link->network->dhcp_use_ntp && dhcp6_lease) { | |
3682 | struct in6_addr *in6_addrs; | |
3683 | char **hosts; | |
3684 | ||
3685 | r = sd_dhcp6_lease_get_ntp_addrs(dhcp6_lease, | |
3686 | &in6_addrs); | |
3687 | if (r > 0) { | |
3688 | if (space) | |
3689 | fputc(' ', f); | |
3690 | serialize_in6_addrs(f, in6_addrs, r); | |
3691 | space = true; | |
3692 | } | |
3693 | ||
3694 | r = sd_dhcp6_lease_get_ntp_fqdn(dhcp6_lease, &hosts); | |
3695 | if (r > 0) | |
3696 | fputstrv(f, hosts, NULL, &space); | |
3697 | } | |
3698 | ||
3699 | fputc('\n', f); | |
3700 | ||
3701 | if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) { | |
3702 | if (link->dhcp_lease) { | |
3703 | (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname); | |
3704 | (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains); | |
3705 | } | |
3706 | if (dhcp6_lease) | |
3707 | (void) sd_dhcp6_lease_get_domains(dhcp6_lease, &dhcp6_domains); | |
3708 | } | |
3709 | ||
3710 | fputs("DOMAINS=", f); | |
3711 | space = false; | |
3712 | ORDERED_SET_FOREACH(p, link->network->search_domains, i) | |
3713 | fputs_with_space(f, p, NULL, &space); | |
3714 | ||
3715 | if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) { | |
3716 | NDiscDNSSL *dd; | |
3717 | ||
3718 | if (dhcp_domainname) | |
3719 | fputs_with_space(f, dhcp_domainname, NULL, &space); | |
3720 | if (dhcp_domains) | |
3721 | fputstrv(f, dhcp_domains, NULL, &space); | |
3722 | if (dhcp6_domains) | |
3723 | fputstrv(f, dhcp6_domains, NULL, &space); | |
3724 | ||
3725 | SET_FOREACH(dd, link->ndisc_dnssl, i) | |
3726 | fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space); | |
3727 | } | |
3728 | ||
3729 | fputc('\n', f); | |
3730 | ||
3731 | fputs("ROUTE_DOMAINS=", f); | |
3732 | space = false; | |
3733 | ORDERED_SET_FOREACH(p, link->network->route_domains, i) | |
3734 | fputs_with_space(f, p, NULL, &space); | |
3735 | ||
3736 | if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) { | |
3737 | NDiscDNSSL *dd; | |
3738 | ||
3739 | if (dhcp_domainname) | |
3740 | fputs_with_space(f, dhcp_domainname, NULL, &space); | |
3741 | if (dhcp_domains) | |
3742 | fputstrv(f, dhcp_domains, NULL, &space); | |
3743 | if (dhcp6_domains) | |
3744 | fputstrv(f, dhcp6_domains, NULL, &space); | |
3745 | ||
3746 | SET_FOREACH(dd, link->ndisc_dnssl, i) | |
3747 | fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space); | |
3748 | } | |
3749 | ||
3750 | fputc('\n', f); | |
3751 | ||
3752 | fprintf(f, "LLMNR=%s\n", | |
3753 | resolve_support_to_string(link->network->llmnr)); | |
3754 | fprintf(f, "MDNS=%s\n", | |
3755 | resolve_support_to_string(link->network->mdns)); | |
3756 | if (link->network->dns_default_route >= 0) | |
3757 | fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(link->network->dns_default_route)); | |
3758 | ||
3759 | if (link->network->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID) | |
3760 | fprintf(f, "DNS_OVER_TLS=%s\n", | |
3761 | dns_over_tls_mode_to_string(link->network->dns_over_tls_mode)); | |
3762 | ||
3763 | if (link->network->dnssec_mode != _DNSSEC_MODE_INVALID) | |
3764 | fprintf(f, "DNSSEC=%s\n", | |
3765 | dnssec_mode_to_string(link->network->dnssec_mode)); | |
3766 | ||
3767 | if (!set_isempty(link->network->dnssec_negative_trust_anchors)) { | |
3768 | const char *n; | |
3769 | ||
3770 | fputs("DNSSEC_NTA=", f); | |
3771 | space = false; | |
3772 | SET_FOREACH(n, link->network->dnssec_negative_trust_anchors, i) | |
3773 | fputs_with_space(f, n, NULL, &space); | |
3774 | fputc('\n', f); | |
3775 | } | |
3776 | ||
3777 | fputs("ADDRESSES=", f); | |
3778 | space = false; | |
3779 | SET_FOREACH(a, link->addresses, i) { | |
3780 | _cleanup_free_ char *address_str = NULL; | |
3781 | ||
3782 | r = in_addr_to_string(a->family, &a->in_addr, &address_str); | |
3783 | if (r < 0) | |
3784 | goto fail; | |
3785 | ||
3786 | fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen); | |
3787 | space = true; | |
3788 | } | |
3789 | fputc('\n', f); | |
3790 | ||
3791 | fputs("ROUTES=", f); | |
3792 | space = false; | |
3793 | SET_FOREACH(route, link->routes, i) { | |
3794 | _cleanup_free_ char *route_str = NULL; | |
3795 | ||
3796 | r = in_addr_to_string(route->family, &route->dst, &route_str); | |
3797 | if (r < 0) | |
3798 | goto fail; | |
3799 | ||
3800 | fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT, | |
3801 | space ? " " : "", route_str, | |
3802 | route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime); | |
3803 | space = true; | |
3804 | } | |
3805 | ||
3806 | fputc('\n', f); | |
3807 | } | |
3808 | ||
3809 | print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links); | |
3810 | print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links); | |
3811 | ||
3812 | if (link->dhcp_lease) { | |
3813 | struct in_addr address; | |
3814 | const char *tz = NULL; | |
3815 | ||
3816 | assert(link->network); | |
3817 | ||
3818 | r = sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz); | |
3819 | if (r >= 0) | |
3820 | fprintf(f, "TIMEZONE=%s\n", tz); | |
3821 | ||
3822 | r = sd_dhcp_lease_get_address(link->dhcp_lease, &address); | |
3823 | if (r >= 0) { | |
3824 | fputs("DHCP4_ADDRESS=", f); | |
3825 | serialize_in_addrs(f, &address, 1, false, NULL); | |
3826 | fputc('\n', f); | |
3827 | } | |
3828 | ||
3829 | r = dhcp_lease_save(link->dhcp_lease, link->lease_file); | |
3830 | if (r < 0) | |
3831 | goto fail; | |
3832 | ||
3833 | fprintf(f, | |
3834 | "DHCP_LEASE=%s\n", | |
3835 | link->lease_file); | |
3836 | } else | |
3837 | (void) unlink(link->lease_file); | |
3838 | ||
3839 | if (link->ipv4ll) { | |
3840 | struct in_addr address; | |
3841 | ||
3842 | r = sd_ipv4ll_get_address(link->ipv4ll, &address); | |
3843 | if (r >= 0) { | |
3844 | fputs("IPV4LL_ADDRESS=", f); | |
3845 | serialize_in_addrs(f, &address, 1, false, NULL); | |
3846 | fputc('\n', f); | |
3847 | } | |
3848 | } | |
3849 | ||
3850 | r = fflush_and_check(f); | |
3851 | if (r < 0) | |
3852 | goto fail; | |
3853 | ||
3854 | if (rename(temp_path, link->state_file) < 0) { | |
3855 | r = -errno; | |
3856 | goto fail; | |
3857 | } | |
3858 | ||
3859 | return 0; | |
3860 | ||
3861 | fail: | |
3862 | (void) unlink(link->state_file); | |
3863 | if (temp_path) | |
3864 | (void) unlink(temp_path); | |
3865 | ||
3866 | return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file); | |
3867 | } | |
3868 | ||
3869 | /* The serialized state in /run is no longer up-to-date. */ | |
3870 | void link_dirty(Link *link) { | |
3871 | int r; | |
3872 | ||
3873 | assert(link); | |
3874 | ||
3875 | /* mark manager dirty as link is dirty */ | |
3876 | manager_dirty(link->manager); | |
3877 | ||
3878 | r = set_ensure_allocated(&link->manager->dirty_links, NULL); | |
3879 | if (r < 0) | |
3880 | /* allocation errors are ignored */ | |
3881 | return; | |
3882 | ||
3883 | r = set_put(link->manager->dirty_links, link); | |
3884 | if (r <= 0) | |
3885 | /* don't take another ref if the link was already dirty */ | |
3886 | return; | |
3887 | ||
3888 | link_ref(link); | |
3889 | } | |
3890 | ||
3891 | /* The serialized state in /run is up-to-date */ | |
3892 | void link_clean(Link *link) { | |
3893 | assert(link); | |
3894 | assert(link->manager); | |
3895 | ||
3896 | link_unref(set_remove(link->manager->dirty_links, link)); | |
3897 | } | |
3898 | ||
3899 | static const char* const link_state_table[_LINK_STATE_MAX] = { | |
3900 | [LINK_STATE_PENDING] = "pending", | |
3901 | [LINK_STATE_INITIALIZED] = "initialized", | |
3902 | [LINK_STATE_CONFIGURING] = "configuring", | |
3903 | [LINK_STATE_CONFIGURED] = "configured", | |
3904 | [LINK_STATE_UNMANAGED] = "unmanaged", | |
3905 | [LINK_STATE_FAILED] = "failed", | |
3906 | [LINK_STATE_LINGER] = "linger", | |
3907 | }; | |
3908 | ||
3909 | DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState); |