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507f26f6 | 1 | /* |
3bf98189 | 2 | * Copyright (C) 2008-2014 Tobias Brunner |
ce5b1708 | 3 | * Copyright (C) 2005-2008 Martin Willi |
507f26f6 TB |
4 | * Hochschule fuer Technik Rapperswil |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify it | |
7 | * under the terms of the GNU General Public License as published by the | |
8 | * Free Software Foundation; either version 2 of the License, or (at your | |
9 | * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, but | |
12 | * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY | |
13 | * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
14 | * for more details. | |
507f26f6 TB |
15 | */ |
16 | ||
d266e895 TE |
17 | /* |
18 | * Copyright (C) 2010 secunet Security Networks AG | |
19 | * Copyright (C) 2010 Thomas Egerer | |
20 | * | |
21 | * Permission is hereby granted, free of charge, to any person obtaining a copy | |
22 | * of this software and associated documentation files (the "Software"), to deal | |
23 | * in the Software without restriction, including without limitation the rights | |
24 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
25 | * copies of the Software, and to permit persons to whom the Software is | |
26 | * furnished to do so, subject to the following conditions: | |
27 | * | |
28 | * The above copyright notice and this permission notice shall be included in | |
29 | * all copies or substantial portions of the Software. | |
30 | * | |
31 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
32 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
33 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
34 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
35 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
36 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | |
37 | * THE SOFTWARE. | |
38 | */ | |
39 | ||
507f26f6 | 40 | #include <sys/socket.h> |
7beb31aa | 41 | #include <sys/utsname.h> |
507f26f6 TB |
42 | #include <linux/netlink.h> |
43 | #include <linux/rtnetlink.h> | |
507f26f6 TB |
44 | #include <unistd.h> |
45 | #include <errno.h> | |
46 | #include <net/if.h> | |
8e8e97d1 | 47 | #ifdef HAVE_LINUX_FIB_RULES_H |
51fefe46 | 48 | #include <linux/fib_rules.h> |
8e8e97d1 | 49 | #endif |
507f26f6 TB |
50 | |
51 | #include "kernel_netlink_net.h" | |
52 | #include "kernel_netlink_shared.h" | |
53 | ||
c5f7146b | 54 | #include <hydra.h> |
f05b4272 | 55 | #include <utils/debug.h> |
eba64cef | 56 | #include <threading/mutex.h> |
a25d536e TB |
57 | #include <threading/rwlock.h> |
58 | #include <threading/rwlock_condvar.h> | |
4134108c | 59 | #include <threading/spinlock.h> |
12642a68 TB |
60 | #include <collections/hashtable.h> |
61 | #include <collections/linked_list.h> | |
507f26f6 | 62 | #include <processing/jobs/callback_job.h> |
507f26f6 | 63 | |
ba26508d | 64 | /** delay before firing roam events (ms) */ |
507f26f6 TB |
65 | #define ROAM_DELAY 100 |
66 | ||
f834249c TB |
67 | /** delay before reinstalling routes (ms) */ |
68 | #define ROUTE_DELAY 100 | |
69 | ||
cbd52e7d TB |
70 | /** maximum recursion when searching for addresses in get_route() */ |
71 | #define MAX_ROUTE_RECURSION 2 | |
72 | ||
0b9ce21b TB |
73 | #ifndef ROUTING_TABLE |
74 | #define ROUTING_TABLE 0 | |
75 | #endif | |
76 | ||
77 | #ifndef ROUTING_TABLE_PRIO | |
78 | #define ROUTING_TABLE_PRIO 0 | |
79 | #endif | |
80 | ||
507f26f6 TB |
81 | typedef struct addr_entry_t addr_entry_t; |
82 | ||
83 | /** | |
c6b40158 | 84 | * IP address in an iface_entry_t |
507f26f6 TB |
85 | */ |
86 | struct addr_entry_t { | |
7daf5226 | 87 | |
c6b40158 | 88 | /** the ip address */ |
507f26f6 | 89 | host_t *ip; |
7daf5226 | 90 | |
3bf98189 TB |
91 | /** address flags */ |
92 | u_char flags; | |
93 | ||
507f26f6 TB |
94 | /** scope of the address */ |
95 | u_char scope; | |
7daf5226 | 96 | |
e8e9048f | 97 | /** number of times this IP is used, if virtual (i.e. managed by us) */ |
507f26f6 | 98 | u_int refcount; |
c6b40158 TB |
99 | |
100 | /** TRUE once it is installed, if virtual */ | |
101 | bool installed; | |
507f26f6 TB |
102 | }; |
103 | ||
104 | /** | |
105 | * destroy a addr_entry_t object | |
106 | */ | |
107 | static void addr_entry_destroy(addr_entry_t *this) | |
108 | { | |
109 | this->ip->destroy(this->ip); | |
110 | free(this); | |
111 | } | |
112 | ||
113 | typedef struct iface_entry_t iface_entry_t; | |
114 | ||
115 | /** | |
116 | * A network interface on this system, containing addr_entry_t's | |
117 | */ | |
118 | struct iface_entry_t { | |
7daf5226 | 119 | |
507f26f6 TB |
120 | /** interface index */ |
121 | int ifindex; | |
7daf5226 | 122 | |
507f26f6 TB |
123 | /** name of the interface */ |
124 | char ifname[IFNAMSIZ]; | |
7daf5226 | 125 | |
507f26f6 TB |
126 | /** interface flags, as in netdevice(7) SIOCGIFFLAGS */ |
127 | u_int flags; | |
7daf5226 | 128 | |
507f26f6 TB |
129 | /** list of addresses as host_t */ |
130 | linked_list_t *addrs; | |
940e1b0f TB |
131 | |
132 | /** TRUE if usable by config */ | |
133 | bool usable; | |
507f26f6 TB |
134 | }; |
135 | ||
136 | /** | |
137 | * destroy an interface entry | |
138 | */ | |
139 | static void iface_entry_destroy(iface_entry_t *this) | |
140 | { | |
141 | this->addrs->destroy_function(this->addrs, (void*)addr_entry_destroy); | |
142 | free(this); | |
143 | } | |
144 | ||
940e1b0f TB |
145 | /** |
146 | * find an interface entry by index | |
147 | */ | |
148 | static bool iface_entry_by_index(iface_entry_t *this, int *ifindex) | |
149 | { | |
150 | return this->ifindex == *ifindex; | |
151 | } | |
152 | ||
c6b40158 TB |
153 | /** |
154 | * find an interface entry by name | |
155 | */ | |
156 | static bool iface_entry_by_name(iface_entry_t *this, char *ifname) | |
157 | { | |
158 | return streq(this->ifname, ifname); | |
159 | } | |
160 | ||
1f97e1aa TB |
161 | /** |
162 | * check if an interface is up | |
163 | */ | |
164 | static inline bool iface_entry_up(iface_entry_t *iface) | |
165 | { | |
166 | return (iface->flags & IFF_UP) == IFF_UP; | |
167 | } | |
168 | ||
940e1b0f TB |
169 | /** |
170 | * check if an interface is up and usable | |
171 | */ | |
172 | static inline bool iface_entry_up_and_usable(iface_entry_t *iface) | |
173 | { | |
1f97e1aa TB |
174 | return iface->usable && iface_entry_up(iface); |
175 | } | |
176 | ||
177 | typedef struct addr_map_entry_t addr_map_entry_t; | |
178 | ||
179 | /** | |
180 | * Entry that maps an IP address to an interface entry | |
181 | */ | |
182 | struct addr_map_entry_t { | |
183 | /** The IP address */ | |
184 | host_t *ip; | |
185 | ||
c6b40158 TB |
186 | /** The address entry for this IP address */ |
187 | addr_entry_t *addr; | |
188 | ||
1f97e1aa TB |
189 | /** The interface this address is installed on */ |
190 | iface_entry_t *iface; | |
191 | }; | |
192 | ||
193 | /** | |
194 | * Hash a addr_map_entry_t object, all entries with the same IP address | |
195 | * are stored in the same bucket | |
196 | */ | |
197 | static u_int addr_map_entry_hash(addr_map_entry_t *this) | |
198 | { | |
199 | return chunk_hash(this->ip->get_address(this->ip)); | |
200 | } | |
201 | ||
202 | /** | |
203 | * Compare two addr_map_entry_t objects, two entries are equal if they are | |
204 | * installed on the same interface | |
205 | */ | |
206 | static bool addr_map_entry_equals(addr_map_entry_t *a, addr_map_entry_t *b) | |
207 | { | |
208 | return a->iface->ifindex == b->iface->ifindex && | |
209 | a->ip->ip_equals(a->ip, b->ip); | |
210 | } | |
211 | ||
212 | /** | |
213 | * Used with get_match this finds an address entry if it is installed on | |
214 | * an up and usable interface | |
215 | */ | |
216 | static bool addr_map_entry_match_up_and_usable(addr_map_entry_t *a, | |
217 | addr_map_entry_t *b) | |
218 | { | |
219 | return iface_entry_up_and_usable(b->iface) && | |
220 | a->ip->ip_equals(a->ip, b->ip); | |
221 | } | |
222 | ||
223 | /** | |
224 | * Used with get_match this finds an address entry if it is installed on | |
225 | * any active local interface | |
226 | */ | |
227 | static bool addr_map_entry_match_up(addr_map_entry_t *a, addr_map_entry_t *b) | |
228 | { | |
229 | return iface_entry_up(b->iface) && a->ip->ip_equals(a->ip, b->ip); | |
940e1b0f TB |
230 | } |
231 | ||
c6b40158 TB |
232 | /** |
233 | * Used with get_match this finds an address entry if it is installed on | |
234 | * any local interface | |
235 | */ | |
236 | static bool addr_map_entry_match(addr_map_entry_t *a, addr_map_entry_t *b) | |
237 | { | |
238 | return a->ip->ip_equals(a->ip, b->ip); | |
239 | } | |
240 | ||
74ba22c9 TB |
241 | typedef struct route_entry_t route_entry_t; |
242 | ||
243 | /** | |
244 | * Installed routing entry | |
245 | */ | |
246 | struct route_entry_t { | |
247 | /** Name of the interface the route is bound to */ | |
248 | char *if_name; | |
249 | ||
250 | /** Source ip of the route */ | |
251 | host_t *src_ip; | |
252 | ||
253 | /** Gateway for this route */ | |
254 | host_t *gateway; | |
255 | ||
256 | /** Destination net */ | |
257 | chunk_t dst_net; | |
258 | ||
259 | /** Destination net prefixlen */ | |
260 | u_int8_t prefixlen; | |
261 | }; | |
262 | ||
263 | /** | |
264 | * Clone a route_entry_t object. | |
265 | */ | |
266 | static route_entry_t *route_entry_clone(route_entry_t *this) | |
267 | { | |
268 | route_entry_t *route; | |
269 | ||
270 | INIT(route, | |
271 | .if_name = strdup(this->if_name), | |
272 | .src_ip = this->src_ip->clone(this->src_ip), | |
3cd7ba49 | 273 | .gateway = this->gateway ? this->gateway->clone(this->gateway) : NULL, |
74ba22c9 TB |
274 | .dst_net = chunk_clone(this->dst_net), |
275 | .prefixlen = this->prefixlen, | |
276 | ); | |
277 | return route; | |
278 | } | |
279 | ||
280 | /** | |
281 | * Destroy a route_entry_t object | |
282 | */ | |
283 | static void route_entry_destroy(route_entry_t *this) | |
284 | { | |
285 | free(this->if_name); | |
286 | DESTROY_IF(this->src_ip); | |
287 | DESTROY_IF(this->gateway); | |
288 | chunk_free(&this->dst_net); | |
289 | free(this); | |
290 | } | |
291 | ||
292 | /** | |
293 | * Hash a route_entry_t object | |
294 | */ | |
295 | static u_int route_entry_hash(route_entry_t *this) | |
296 | { | |
297 | return chunk_hash_inc(chunk_from_thing(this->prefixlen), | |
298 | chunk_hash(this->dst_net)); | |
299 | } | |
300 | ||
301 | /** | |
302 | * Compare two route_entry_t objects | |
303 | */ | |
304 | static bool route_entry_equals(route_entry_t *a, route_entry_t *b) | |
305 | { | |
3cd7ba49 TB |
306 | if (a->if_name && b->if_name && streq(a->if_name, b->if_name) && |
307 | a->src_ip->ip_equals(a->src_ip, b->src_ip) && | |
308 | chunk_equals(a->dst_net, b->dst_net) && a->prefixlen == b->prefixlen) | |
309 | { | |
310 | return (!a->gateway && !b->gateway) || (a->gateway && b->gateway && | |
311 | a->gateway->ip_equals(a->gateway, b->gateway)); | |
312 | } | |
313 | return FALSE; | |
74ba22c9 TB |
314 | } |
315 | ||
f834249c TB |
316 | typedef struct net_change_t net_change_t; |
317 | ||
318 | /** | |
319 | * Queued network changes | |
320 | */ | |
321 | struct net_change_t { | |
322 | /** Name of the interface that got activated (or an IP appeared on) */ | |
323 | char *if_name; | |
f834249c TB |
324 | }; |
325 | ||
326 | /** | |
327 | * Destroy a net_change_t object | |
328 | */ | |
329 | static void net_change_destroy(net_change_t *this) | |
330 | { | |
f834249c TB |
331 | free(this->if_name); |
332 | free(this); | |
333 | } | |
334 | ||
335 | /** | |
336 | * Hash a net_change_t object | |
337 | */ | |
338 | static u_int net_change_hash(net_change_t *this) | |
339 | { | |
f834249c TB |
340 | return chunk_hash(chunk_create(this->if_name, strlen(this->if_name))); |
341 | } | |
342 | ||
343 | /** | |
344 | * Compare two net_change_t objects | |
345 | */ | |
346 | static bool net_change_equals(net_change_t *a, net_change_t *b) | |
347 | { | |
c732e220 | 348 | return streq(a->if_name, b->if_name); |
f834249c TB |
349 | } |
350 | ||
507f26f6 TB |
351 | typedef struct private_kernel_netlink_net_t private_kernel_netlink_net_t; |
352 | ||
353 | /** | |
354 | * Private variables and functions of kernel_netlink_net class. | |
355 | */ | |
356 | struct private_kernel_netlink_net_t { | |
357 | /** | |
358 | * Public part of the kernel_netlink_net_t object. | |
359 | */ | |
360 | kernel_netlink_net_t public; | |
7daf5226 | 361 | |
507f26f6 | 362 | /** |
a25d536e | 363 | * lock to access various lists and maps |
507f26f6 | 364 | */ |
a25d536e | 365 | rwlock_t *lock; |
7daf5226 | 366 | |
507f26f6 TB |
367 | /** |
368 | * condition variable to signal virtual IP add/removal | |
369 | */ | |
a25d536e | 370 | rwlock_condvar_t *condvar; |
7daf5226 | 371 | |
507f26f6 TB |
372 | /** |
373 | * Cached list of interfaces and its addresses (iface_entry_t) | |
374 | */ | |
375 | linked_list_t *ifaces; | |
7daf5226 | 376 | |
1f97e1aa TB |
377 | /** |
378 | * Map for IP addresses to iface_entry_t objects (addr_map_entry_t) | |
379 | */ | |
380 | hashtable_t *addrs; | |
381 | ||
c6b40158 TB |
382 | /** |
383 | * Map for virtual IP addresses to iface_entry_t objects (addr_map_entry_t) | |
384 | */ | |
385 | hashtable_t *vips; | |
386 | ||
507f26f6 TB |
387 | /** |
388 | * netlink rt socket (routing) | |
389 | */ | |
390 | netlink_socket_t *socket; | |
7daf5226 | 391 | |
507f26f6 TB |
392 | /** |
393 | * Netlink rt socket to receive address change events | |
394 | */ | |
395 | int socket_events; | |
7daf5226 | 396 | |
507f26f6 | 397 | /** |
4134108c | 398 | * earliest time of the next roam event |
507f26f6 | 399 | */ |
4134108c TB |
400 | timeval_t next_roam; |
401 | ||
77d4a028 TB |
402 | /** |
403 | * roam event due to address change | |
404 | */ | |
405 | bool roam_address; | |
406 | ||
4134108c TB |
407 | /** |
408 | * lock to check and update roam event time | |
409 | */ | |
410 | spinlock_t *roam_lock; | |
7daf5226 | 411 | |
507f26f6 TB |
412 | /** |
413 | * routing table to install routes | |
414 | */ | |
415 | int routing_table; | |
7daf5226 | 416 | |
507f26f6 TB |
417 | /** |
418 | * priority of used routing table | |
419 | */ | |
420 | int routing_table_prio; | |
7daf5226 | 421 | |
74ba22c9 TB |
422 | /** |
423 | * installed routes | |
424 | */ | |
425 | hashtable_t *routes; | |
426 | ||
16d62305 TB |
427 | /** |
428 | * mutex for routes | |
429 | */ | |
430 | mutex_t *routes_lock; | |
431 | ||
f834249c | 432 | /** |
c732e220 | 433 | * interface changes which may trigger route reinstallation |
f834249c TB |
434 | */ |
435 | hashtable_t *net_changes; | |
436 | ||
437 | /** | |
438 | * mutex for route reinstallation triggers | |
439 | */ | |
440 | mutex_t *net_changes_lock; | |
441 | ||
442 | /** | |
443 | * time of last route reinstallation | |
444 | */ | |
445 | timeval_t last_route_reinstall; | |
446 | ||
507f26f6 TB |
447 | /** |
448 | * whether to react to RTM_NEWROUTE or RTM_DELROUTE events | |
449 | */ | |
450 | bool process_route; | |
7daf5226 | 451 | |
37873f99 TB |
452 | /** |
453 | * whether to trigger roam events | |
454 | */ | |
455 | bool roam_events; | |
456 | ||
9474a0d9 MW |
457 | /** |
458 | * whether to actually install virtual IPs | |
459 | */ | |
460 | bool install_virtual_ip; | |
d266e895 | 461 | |
e8e9048f TB |
462 | /** |
463 | * the name of the interface virtual IP addresses are installed on | |
464 | */ | |
465 | char *install_virtual_ip_on; | |
466 | ||
7beb31aa TB |
467 | /** |
468 | * whether preferred source addresses can be specified for IPv6 routes | |
469 | */ | |
470 | bool rta_prefsrc_for_ipv6; | |
471 | ||
3bf98189 TB |
472 | /** |
473 | * whether to prefer temporary IPv6 addresses over public ones | |
474 | */ | |
475 | bool prefer_temporary_addrs; | |
476 | ||
d266e895 TE |
477 | /** |
478 | * list with routing tables to be excluded from route lookup | |
479 | */ | |
480 | linked_list_t *rt_exclude; | |
c1adf7e0 TB |
481 | |
482 | /** | |
483 | * MTU to set on installed routes | |
484 | */ | |
485 | u_int32_t mtu; | |
47a0e289 TB |
486 | |
487 | /** | |
488 | * MSS to set on installed routes | |
489 | */ | |
490 | u_int32_t mss; | |
507f26f6 TB |
491 | }; |
492 | ||
f834249c TB |
493 | /** |
494 | * Forward declaration | |
495 | */ | |
496 | static status_t manage_srcroute(private_kernel_netlink_net_t *this, | |
497 | int nlmsg_type, int flags, chunk_t dst_net, | |
498 | u_int8_t prefixlen, host_t *gateway, | |
499 | host_t *src_ip, char *if_name); | |
500 | ||
501 | /** | |
502 | * Clear the queued network changes. | |
503 | */ | |
504 | static void net_changes_clear(private_kernel_netlink_net_t *this) | |
505 | { | |
506 | enumerator_t *enumerator; | |
507 | net_change_t *change; | |
508 | ||
509 | enumerator = this->net_changes->create_enumerator(this->net_changes); | |
510 | while (enumerator->enumerate(enumerator, NULL, (void**)&change)) | |
511 | { | |
512 | this->net_changes->remove_at(this->net_changes, enumerator); | |
513 | net_change_destroy(change); | |
514 | } | |
515 | enumerator->destroy(enumerator); | |
516 | } | |
517 | ||
518 | /** | |
519 | * Act upon queued network changes. | |
520 | */ | |
521 | static job_requeue_t reinstall_routes(private_kernel_netlink_net_t *this) | |
522 | { | |
523 | enumerator_t *enumerator; | |
524 | route_entry_t *route; | |
525 | ||
526 | this->net_changes_lock->lock(this->net_changes_lock); | |
16d62305 | 527 | this->routes_lock->lock(this->routes_lock); |
f834249c TB |
528 | |
529 | enumerator = this->routes->create_enumerator(this->routes); | |
530 | while (enumerator->enumerate(enumerator, NULL, (void**)&route)) | |
531 | { | |
532 | net_change_t *change, lookup = { | |
533 | .if_name = route->if_name, | |
534 | }; | |
c732e220 | 535 | /* check if a change for the outgoing interface is queued */ |
f834249c TB |
536 | change = this->net_changes->get(this->net_changes, &lookup); |
537 | if (!change) | |
c732e220 | 538 | { /* in case src_ip is not on the outgoing interface */ |
9ba36c0f TB |
539 | if (this->public.interface.get_interface(&this->public.interface, |
540 | route->src_ip, &lookup.if_name)) | |
c732e220 | 541 | { |
9ba36c0f TB |
542 | if (!streq(lookup.if_name, route->if_name)) |
543 | { | |
544 | change = this->net_changes->get(this->net_changes, &lookup); | |
545 | } | |
546 | free(lookup.if_name); | |
c732e220 | 547 | } |
f834249c TB |
548 | } |
549 | if (change) | |
550 | { | |
551 | manage_srcroute(this, RTM_NEWROUTE, NLM_F_CREATE | NLM_F_EXCL, | |
552 | route->dst_net, route->prefixlen, route->gateway, | |
553 | route->src_ip, route->if_name); | |
554 | } | |
555 | } | |
556 | enumerator->destroy(enumerator); | |
16d62305 | 557 | this->routes_lock->unlock(this->routes_lock); |
f834249c TB |
558 | |
559 | net_changes_clear(this); | |
560 | this->net_changes_lock->unlock(this->net_changes_lock); | |
561 | return JOB_REQUEUE_NONE; | |
562 | } | |
563 | ||
564 | /** | |
565 | * Queue route reinstallation caused by network changes for a given interface. | |
f834249c TB |
566 | * |
567 | * The route reinstallation is delayed for a while and only done once for | |
568 | * several calls during this delay, in order to avoid doing it too often. | |
c732e220 | 569 | * The interface name is freed. |
f834249c TB |
570 | */ |
571 | static void queue_route_reinstall(private_kernel_netlink_net_t *this, | |
c732e220 | 572 | char *if_name) |
f834249c TB |
573 | { |
574 | net_change_t *update, *found; | |
575 | timeval_t now; | |
576 | job_t *job; | |
577 | ||
578 | INIT(update, | |
c732e220 | 579 | .if_name = if_name |
f834249c TB |
580 | ); |
581 | ||
582 | this->net_changes_lock->lock(this->net_changes_lock); | |
c732e220 | 583 | found = this->net_changes->put(this->net_changes, update, update); |
f834249c TB |
584 | if (found) |
585 | { | |
c732e220 | 586 | net_change_destroy(found); |
f834249c TB |
587 | } |
588 | time_monotonic(&now); | |
589 | if (timercmp(&now, &this->last_route_reinstall, >)) | |
590 | { | |
eecd41e3 | 591 | timeval_add_ms(&now, ROUTE_DELAY); |
f834249c TB |
592 | this->last_route_reinstall = now; |
593 | ||
594 | job = (job_t*)callback_job_create((callback_job_cb_t)reinstall_routes, | |
595 | this, NULL, NULL); | |
596 | lib->scheduler->schedule_job_ms(lib->scheduler, job, ROUTE_DELAY); | |
597 | } | |
598 | this->net_changes_lock->unlock(this->net_changes_lock); | |
599 | } | |
600 | ||
507f26f6 | 601 | /** |
c6b40158 TB |
602 | * check if the given IP is known as virtual IP and currently installed |
603 | * | |
604 | * this function will also return TRUE if the virtual IP entry disappeared. | |
605 | * in that case the returned entry will be NULL. | |
606 | * | |
a25d536e | 607 | * this->lock must be held when calling this function |
507f26f6 | 608 | */ |
c6b40158 TB |
609 | static bool is_vip_installed_or_gone(private_kernel_netlink_net_t *this, |
610 | host_t *ip, addr_map_entry_t **entry) | |
507f26f6 | 611 | { |
c6b40158 TB |
612 | addr_map_entry_t lookup = { |
613 | .ip = ip, | |
614 | }; | |
7daf5226 | 615 | |
c6b40158 TB |
616 | *entry = this->vips->get_match(this->vips, &lookup, |
617 | (void*)addr_map_entry_match); | |
618 | if (*entry == NULL) | |
619 | { /* the virtual IP disappeared */ | |
620 | return TRUE; | |
507f26f6 | 621 | } |
c6b40158 TB |
622 | return (*entry)->addr->installed; |
623 | } | |
7daf5226 | 624 | |
c6b40158 TB |
625 | /** |
626 | * check if the given IP is known as virtual IP | |
627 | * | |
a25d536e | 628 | * this->lock must be held when calling this function |
c6b40158 TB |
629 | */ |
630 | static bool is_known_vip(private_kernel_netlink_net_t *this, host_t *ip) | |
631 | { | |
632 | addr_map_entry_t lookup = { | |
633 | .ip = ip, | |
634 | }; | |
635 | ||
636 | return this->vips->get_match(this->vips, &lookup, | |
637 | (void*)addr_map_entry_match) != NULL; | |
507f26f6 TB |
638 | } |
639 | ||
1f97e1aa TB |
640 | /** |
641 | * Add an address map entry | |
642 | */ | |
c6b40158 TB |
643 | static void addr_map_entry_add(hashtable_t *map, addr_entry_t *addr, |
644 | iface_entry_t *iface) | |
1f97e1aa TB |
645 | { |
646 | addr_map_entry_t *entry; | |
647 | ||
1f97e1aa TB |
648 | INIT(entry, |
649 | .ip = addr->ip, | |
c6b40158 | 650 | .addr = addr, |
1f97e1aa TB |
651 | .iface = iface, |
652 | ); | |
c6b40158 | 653 | entry = map->put(map, entry, entry); |
1f97e1aa TB |
654 | free(entry); |
655 | } | |
656 | ||
657 | /** | |
c6b40158 | 658 | * Remove an address map entry |
1f97e1aa | 659 | */ |
c6b40158 TB |
660 | static void addr_map_entry_remove(hashtable_t *map, addr_entry_t *addr, |
661 | iface_entry_t *iface) | |
1f97e1aa TB |
662 | { |
663 | addr_map_entry_t *entry, lookup = { | |
664 | .ip = addr->ip, | |
c6b40158 | 665 | .addr = addr, |
1f97e1aa TB |
666 | .iface = iface, |
667 | }; | |
668 | ||
c6b40158 | 669 | entry = map->remove(map, &lookup); |
1f97e1aa TB |
670 | free(entry); |
671 | } | |
672 | ||
29607690 | 673 | /** |
3bf98189 TB |
674 | * Determine the type or scope of the given unicast IP address. This is not |
675 | * the same thing returned in rtm_scope/ifa_scope. | |
676 | * | |
677 | * We use return values as defined in RFC 6724 (referring to RFC 4291). | |
678 | */ | |
679 | static u_char get_scope(host_t *ip) | |
680 | { | |
681 | chunk_t addr; | |
682 | ||
683 | addr = ip->get_address(ip); | |
684 | switch (addr.len) | |
685 | { | |
686 | case 4: | |
687 | /* we use the mapping defined in RFC 6724, 3.2 */ | |
688 | if (addr.ptr[0] == 127) | |
689 | { /* link-local, same as the IPv6 loopback address */ | |
690 | return 2; | |
691 | } | |
692 | if (addr.ptr[0] == 169 && addr.ptr[1] == 254) | |
693 | { /* link-local */ | |
694 | return 2; | |
695 | } | |
696 | break; | |
697 | case 16: | |
cd6b2af3 | 698 | if (IN6_IS_ADDR_LOOPBACK((struct in6_addr*)addr.ptr)) |
3bf98189 TB |
699 | { /* link-local, according to RFC 4291, 2.5.3 */ |
700 | return 2; | |
701 | } | |
cd6b2af3 | 702 | if (IN6_IS_ADDR_LINKLOCAL((struct in6_addr*)addr.ptr)) |
3bf98189 TB |
703 | { |
704 | return 2; | |
705 | } | |
cd6b2af3 | 706 | if (IN6_IS_ADDR_SITELOCAL((struct in6_addr*)addr.ptr)) |
3bf98189 TB |
707 | { /* deprecated, according to RFC 4291, 2.5.7 */ |
708 | return 5; | |
709 | } | |
710 | break; | |
711 | default: | |
712 | break; | |
713 | } | |
714 | /* global */ | |
715 | return 14; | |
716 | } | |
717 | ||
718 | /** | |
719 | * Returns the length of the common prefix in bits up to the length of a's | |
720 | * prefix, defined by RFC 6724 as the portion of the address not including the | |
721 | * interface ID, which is 64-bit for most unicast addresses (see RFC 4291). | |
722 | */ | |
723 | static u_char common_prefix(host_t *a, host_t *b) | |
724 | { | |
725 | chunk_t aa, ba; | |
726 | u_char byte, bits = 0, match; | |
727 | ||
728 | aa = a->get_address(a); | |
729 | ba = b->get_address(b); | |
730 | for (byte = 0; byte < 8; byte++) | |
731 | { | |
732 | if (aa.ptr[byte] != ba.ptr[byte]) | |
733 | { | |
734 | match = aa.ptr[byte] ^ ba.ptr[byte]; | |
735 | for (bits = 8; match; match >>= 1) | |
736 | { | |
737 | bits--; | |
738 | } | |
739 | break; | |
740 | } | |
741 | } | |
742 | return byte * 8 + bits; | |
743 | } | |
744 | ||
745 | /** | |
746 | * Compare two IP addresses and return TRUE if the second address is the better | |
747 | * choice of the two to reach the destination. | |
748 | * For IPv6 we approximately follow RFC 6724. | |
749 | */ | |
750 | static bool is_address_better(private_kernel_netlink_net_t *this, | |
751 | addr_entry_t *a, addr_entry_t *b, host_t *d) | |
752 | { | |
753 | u_char sa, sb, sd, pa, pb; | |
754 | ||
755 | /* rule 2: prefer appropriate scope */ | |
756 | if (d) | |
757 | { | |
758 | sa = get_scope(a->ip); | |
759 | sb = get_scope(b->ip); | |
760 | sd = get_scope(d); | |
761 | if (sa < sb) | |
762 | { | |
763 | return sa < sd; | |
764 | } | |
765 | else if (sb < sa) | |
766 | { | |
767 | return sb >= sd; | |
768 | } | |
769 | } | |
770 | if (a->ip->get_family(a->ip) == AF_INET) | |
771 | { /* stop here for IPv4, default to addresses found earlier */ | |
772 | return FALSE; | |
773 | } | |
774 | /* rule 3: avoid deprecated addresses (RFC 4862) */ | |
775 | if ((a->flags & IFA_F_DEPRECATED) != (b->flags & IFA_F_DEPRECATED)) | |
776 | { | |
777 | return a->flags & IFA_F_DEPRECATED; | |
778 | } | |
779 | /* rule 4 is not applicable as we don't know if an address is a home or | |
780 | * care-of addresses. | |
781 | * rule 5 does not apply as we only compare addresses from one interface | |
782 | * rule 6 requires a policy table (optionally configurable) to match | |
783 | * configurable labels | |
784 | */ | |
785 | /* rule 7: prefer temporary addresses (WE REVERSE THIS BY DEFAULT!) */ | |
786 | if ((a->flags & IFA_F_TEMPORARY) != (b->flags & IFA_F_TEMPORARY)) | |
787 | { | |
788 | if (this->prefer_temporary_addrs) | |
789 | { | |
790 | return b->flags & IFA_F_TEMPORARY; | |
791 | } | |
792 | return a->flags & IFA_F_TEMPORARY; | |
793 | } | |
794 | /* rule 8: use longest matching prefix */ | |
795 | if (d) | |
796 | { | |
797 | pa = common_prefix(a->ip, d); | |
798 | pb = common_prefix(b->ip, d); | |
799 | if (pa != pb) | |
800 | { | |
801 | return pb > pa; | |
802 | } | |
803 | } | |
804 | /* default to addresses found earlier */ | |
805 | return FALSE; | |
806 | } | |
807 | ||
808 | /** | |
809 | * Get a non-virtual IP address on the given interface. | |
810 | * | |
811 | * If a candidate address is given, we first search for that address and if not | |
da6d86dd | 812 | * found return the address as above. |
3bf98189 | 813 | * Returned host is a clone, has to be freed by caller. |
a25d536e | 814 | * |
3bf98189 | 815 | * this->lock must be held when calling this function. |
29607690 TB |
816 | */ |
817 | static host_t *get_interface_address(private_kernel_netlink_net_t *this, | |
3bf98189 TB |
818 | int ifindex, int family, host_t *dest, |
819 | host_t *candidate) | |
29607690 | 820 | { |
29607690 | 821 | iface_entry_t *iface; |
c6b40158 | 822 | enumerator_t *addrs; |
3bf98189 | 823 | addr_entry_t *addr, *best = NULL; |
29607690 | 824 | |
c6b40158 TB |
825 | if (this->ifaces->find_first(this->ifaces, (void*)iface_entry_by_index, |
826 | (void**)&iface, &ifindex) == SUCCESS) | |
29607690 | 827 | { |
c6b40158 TB |
828 | if (iface->usable) |
829 | { /* only use interfaces not excluded by config */ | |
29607690 TB |
830 | addrs = iface->addrs->create_enumerator(iface->addrs); |
831 | while (addrs->enumerate(addrs, &addr)) | |
832 | { | |
3bf98189 TB |
833 | if (addr->refcount || |
834 | addr->ip->get_family(addr->ip) != family) | |
835 | { /* ignore virtual IP addresses and ensure family matches */ | |
da6d86dd TB |
836 | continue; |
837 | } | |
3bf98189 TB |
838 | if (candidate && candidate->ip_equals(candidate, addr->ip)) |
839 | { /* stop if we find the candidate */ | |
840 | best = addr; | |
841 | break; | |
842 | } | |
843 | else if (!best || is_address_better(this, best, addr, dest)) | |
da6d86dd | 844 | { |
3bf98189 | 845 | best = addr; |
29607690 TB |
846 | } |
847 | } | |
848 | addrs->destroy(addrs); | |
29607690 TB |
849 | } |
850 | } | |
3bf98189 | 851 | return best ? best->ip->clone(best->ip) : NULL; |
29607690 TB |
852 | } |
853 | ||
507f26f6 | 854 | /** |
ba26508d | 855 | * callback function that raises the delayed roam event |
507f26f6 | 856 | */ |
77d4a028 | 857 | static job_requeue_t roam_event(private_kernel_netlink_net_t *this) |
ba26508d | 858 | { |
77d4a028 TB |
859 | bool address; |
860 | ||
861 | this->roam_lock->lock(this->roam_lock); | |
862 | address = this->roam_address; | |
863 | this->roam_address = FALSE; | |
864 | this->roam_lock->unlock(this->roam_lock); | |
865 | hydra->kernel_interface->roam(hydra->kernel_interface, address); | |
ba26508d TB |
866 | return JOB_REQUEUE_NONE; |
867 | } | |
868 | ||
869 | /** | |
870 | * fire a roaming event. we delay it for a bit and fire only one event | |
871 | * for multiple calls. otherwise we would create too many events. | |
872 | */ | |
873 | static void fire_roam_event(private_kernel_netlink_net_t *this, bool address) | |
507f26f6 | 874 | { |
de578445 | 875 | timeval_t now; |
ba26508d | 876 | job_t *job; |
7daf5226 | 877 | |
37873f99 TB |
878 | if (!this->roam_events) |
879 | { | |
880 | return; | |
881 | } | |
882 | ||
de578445 | 883 | time_monotonic(&now); |
4134108c | 884 | this->roam_lock->lock(this->roam_lock); |
11f46853 | 885 | this->roam_address |= address; |
4134108c | 886 | if (!timercmp(&now, &this->next_roam, >)) |
507f26f6 | 887 | { |
4134108c TB |
888 | this->roam_lock->unlock(this->roam_lock); |
889 | return; | |
507f26f6 | 890 | } |
eecd41e3 | 891 | timeval_add_ms(&now, ROAM_DELAY); |
4134108c TB |
892 | this->next_roam = now; |
893 | this->roam_lock->unlock(this->roam_lock); | |
894 | ||
895 | job = (job_t*)callback_job_create((callback_job_cb_t)roam_event, | |
77d4a028 | 896 | this, NULL, NULL); |
4134108c | 897 | lib->scheduler->schedule_job_ms(lib->scheduler, job, ROAM_DELAY); |
507f26f6 TB |
898 | } |
899 | ||
940e1b0f TB |
900 | /** |
901 | * check if an interface with a given index is up and usable | |
c6b40158 | 902 | * |
a25d536e | 903 | * this->lock must be locked when calling this function |
940e1b0f TB |
904 | */ |
905 | static bool is_interface_up_and_usable(private_kernel_netlink_net_t *this, | |
906 | int index) | |
907 | { | |
908 | iface_entry_t *iface; | |
909 | ||
910 | if (this->ifaces->find_first(this->ifaces, (void*)iface_entry_by_index, | |
911 | (void**)&iface, &index) == SUCCESS) | |
912 | { | |
913 | return iface_entry_up_and_usable(iface); | |
914 | } | |
915 | return FALSE; | |
916 | } | |
917 | ||
c6b40158 TB |
918 | /** |
919 | * unregister the current addr_entry_t from the hashtable it is stored in | |
920 | * | |
a25d536e | 921 | * this->lock must be locked when calling this function |
c6b40158 | 922 | */ |
e8e9048f | 923 | static void addr_entry_unregister(addr_entry_t *addr, iface_entry_t *iface, |
c6b40158 TB |
924 | private_kernel_netlink_net_t *this) |
925 | { | |
926 | if (addr->refcount) | |
927 | { | |
928 | addr_map_entry_remove(this->vips, addr, iface); | |
929 | this->condvar->broadcast(this->condvar); | |
930 | return; | |
931 | } | |
932 | addr_map_entry_remove(this->addrs, addr, iface); | |
933 | } | |
934 | ||
507f26f6 TB |
935 | /** |
936 | * process RTM_NEWLINK/RTM_DELLINK from kernel | |
937 | */ | |
938 | static void process_link(private_kernel_netlink_net_t *this, | |
939 | struct nlmsghdr *hdr, bool event) | |
940 | { | |
941 | struct ifinfomsg* msg = (struct ifinfomsg*)(NLMSG_DATA(hdr)); | |
942 | struct rtattr *rta = IFLA_RTA(msg); | |
943 | size_t rtasize = IFLA_PAYLOAD (hdr); | |
e13389a7 | 944 | enumerator_t *enumerator; |
507f26f6 TB |
945 | iface_entry_t *current, *entry = NULL; |
946 | char *name = NULL; | |
f834249c | 947 | bool update = FALSE, update_routes = FALSE; |
7daf5226 | 948 | |
f834249c | 949 | while (RTA_OK(rta, rtasize)) |
507f26f6 TB |
950 | { |
951 | switch (rta->rta_type) | |
952 | { | |
953 | case IFLA_IFNAME: | |
954 | name = RTA_DATA(rta); | |
955 | break; | |
956 | } | |
957 | rta = RTA_NEXT(rta, rtasize); | |
958 | } | |
959 | if (!name) | |
960 | { | |
961 | name = "(unknown)"; | |
962 | } | |
7daf5226 | 963 | |
a25d536e | 964 | this->lock->write_lock(this->lock); |
507f26f6 TB |
965 | switch (hdr->nlmsg_type) |
966 | { | |
967 | case RTM_NEWLINK: | |
968 | { | |
c6b40158 TB |
969 | if (this->ifaces->find_first(this->ifaces, |
970 | (void*)iface_entry_by_index, (void**)&entry, | |
971 | &msg->ifi_index) != SUCCESS) | |
507f26f6 | 972 | { |
c6b40158 TB |
973 | INIT(entry, |
974 | .ifindex = msg->ifi_index, | |
975 | .addrs = linked_list_create(), | |
976 | .usable = hydra->kernel_interface->is_interface_usable( | |
977 | hydra->kernel_interface, name), | |
978 | ); | |
507f26f6 TB |
979 | this->ifaces->insert_last(this->ifaces, entry); |
980 | } | |
f526b35c | 981 | strncpy(entry->ifname, name, IFNAMSIZ); |
507f26f6 | 982 | entry->ifname[IFNAMSIZ-1] = '\0'; |
940e1b0f | 983 | if (event && entry->usable) |
507f26f6 TB |
984 | { |
985 | if (!(entry->flags & IFF_UP) && (msg->ifi_flags & IFF_UP)) | |
986 | { | |
f834249c | 987 | update = update_routes = TRUE; |
507f26f6 TB |
988 | DBG1(DBG_KNL, "interface %s activated", name); |
989 | } | |
990 | if ((entry->flags & IFF_UP) && !(msg->ifi_flags & IFF_UP)) | |
991 | { | |
992 | update = TRUE; | |
993 | DBG1(DBG_KNL, "interface %s deactivated", name); | |
994 | } | |
995 | } | |
996 | entry->flags = msg->ifi_flags; | |
507f26f6 TB |
997 | break; |
998 | } | |
999 | case RTM_DELLINK: | |
1000 | { | |
e13389a7 MW |
1001 | enumerator = this->ifaces->create_enumerator(this->ifaces); |
1002 | while (enumerator->enumerate(enumerator, ¤t)) | |
507f26f6 TB |
1003 | { |
1004 | if (current->ifindex == msg->ifi_index) | |
1005 | { | |
940e1b0f | 1006 | if (event && current->usable) |
7b218736 MP |
1007 | { |
1008 | update = TRUE; | |
1009 | DBG1(DBG_KNL, "interface %s deleted", current->ifname); | |
1010 | } | |
c6b40158 TB |
1011 | /* TODO: move virtual IPs installed on this interface to |
1012 | * another interface? */ | |
7b218736 | 1013 | this->ifaces->remove_at(this->ifaces, enumerator); |
1f97e1aa | 1014 | current->addrs->invoke_function(current->addrs, |
e8e9048f | 1015 | (void*)addr_entry_unregister, current, this); |
7b218736 | 1016 | iface_entry_destroy(current); |
507f26f6 TB |
1017 | break; |
1018 | } | |
1019 | } | |
e13389a7 | 1020 | enumerator->destroy(enumerator); |
507f26f6 TB |
1021 | break; |
1022 | } | |
1023 | } | |
a25d536e | 1024 | this->lock->unlock(this->lock); |
7daf5226 | 1025 | |
f834249c TB |
1026 | if (update_routes && event) |
1027 | { | |
c732e220 | 1028 | queue_route_reinstall(this, strdup(name)); |
f834249c TB |
1029 | } |
1030 | ||
507f26f6 TB |
1031 | if (update && event) |
1032 | { | |
ba26508d | 1033 | fire_roam_event(this, TRUE); |
507f26f6 TB |
1034 | } |
1035 | } | |
1036 | ||
1037 | /** | |
1038 | * process RTM_NEWADDR/RTM_DELADDR from kernel | |
1039 | */ | |
1040 | static void process_addr(private_kernel_netlink_net_t *this, | |
1041 | struct nlmsghdr *hdr, bool event) | |
1042 | { | |
1043 | struct ifaddrmsg* msg = (struct ifaddrmsg*)(NLMSG_DATA(hdr)); | |
1044 | struct rtattr *rta = IFA_RTA(msg); | |
1045 | size_t rtasize = IFA_PAYLOAD (hdr); | |
1046 | host_t *host = NULL; | |
507f26f6 | 1047 | iface_entry_t *iface; |
507f26f6 | 1048 | chunk_t local = chunk_empty, address = chunk_empty; |
f834249c | 1049 | char *route_ifname = NULL; |
507f26f6 | 1050 | bool update = FALSE, found = FALSE, changed = FALSE; |
7daf5226 | 1051 | |
f834249c | 1052 | while (RTA_OK(rta, rtasize)) |
507f26f6 TB |
1053 | { |
1054 | switch (rta->rta_type) | |
1055 | { | |
1056 | case IFA_LOCAL: | |
1057 | local.ptr = RTA_DATA(rta); | |
1058 | local.len = RTA_PAYLOAD(rta); | |
1059 | break; | |
1060 | case IFA_ADDRESS: | |
1061 | address.ptr = RTA_DATA(rta); | |
1062 | address.len = RTA_PAYLOAD(rta); | |
1063 | break; | |
1064 | } | |
1065 | rta = RTA_NEXT(rta, rtasize); | |
1066 | } | |
7daf5226 | 1067 | |
507f26f6 TB |
1068 | /* For PPP interfaces, we need the IFA_LOCAL address, |
1069 | * IFA_ADDRESS is the peers address. But IFA_LOCAL is | |
1070 | * not included in all cases (IPv6?), so fallback to IFA_ADDRESS. */ | |
1071 | if (local.ptr) | |
1072 | { | |
1073 | host = host_create_from_chunk(msg->ifa_family, local, 0); | |
1074 | } | |
1075 | else if (address.ptr) | |
1076 | { | |
1077 | host = host_create_from_chunk(msg->ifa_family, address, 0); | |
1078 | } | |
7daf5226 | 1079 | |
507f26f6 TB |
1080 | if (host == NULL) |
1081 | { /* bad family? */ | |
1082 | return; | |
1083 | } | |
7daf5226 | 1084 | |
a25d536e | 1085 | this->lock->write_lock(this->lock); |
c6b40158 TB |
1086 | if (this->ifaces->find_first(this->ifaces, (void*)iface_entry_by_index, |
1087 | (void**)&iface, &msg->ifa_index) == SUCCESS) | |
507f26f6 | 1088 | { |
c6b40158 TB |
1089 | addr_map_entry_t *entry, lookup = { |
1090 | .ip = host, | |
1091 | .iface = iface, | |
1092 | }; | |
1093 | addr_entry_t *addr; | |
1094 | ||
1095 | entry = this->vips->get(this->vips, &lookup); | |
1096 | if (entry) | |
507f26f6 | 1097 | { |
c6b40158 TB |
1098 | if (hdr->nlmsg_type == RTM_NEWADDR) |
1099 | { /* mark as installed and signal waiting threads */ | |
1100 | entry->addr->installed = TRUE; | |
1101 | } | |
1102 | else | |
1103 | { /* the address was already marked as uninstalled */ | |
1104 | addr = entry->addr; | |
1105 | iface->addrs->remove(iface->addrs, addr, NULL); | |
1106 | addr_map_entry_remove(this->vips, addr, iface); | |
1107 | addr_entry_destroy(addr); | |
1108 | } | |
1109 | /* no roam events etc. for virtual IPs */ | |
1110 | this->condvar->broadcast(this->condvar); | |
a25d536e | 1111 | this->lock->unlock(this->lock); |
c6b40158 TB |
1112 | host->destroy(host); |
1113 | return; | |
1114 | } | |
1115 | entry = this->addrs->get(this->addrs, &lookup); | |
1116 | if (entry) | |
1117 | { | |
1118 | if (hdr->nlmsg_type == RTM_DELADDR) | |
507f26f6 | 1119 | { |
c6b40158 TB |
1120 | found = TRUE; |
1121 | addr = entry->addr; | |
1122 | iface->addrs->remove(iface->addrs, addr, NULL); | |
1123 | if (iface->usable) | |
507f26f6 | 1124 | { |
c6b40158 TB |
1125 | changed = TRUE; |
1126 | DBG1(DBG_KNL, "%H disappeared from %s", host, | |
1127 | iface->ifname); | |
507f26f6 | 1128 | } |
c6b40158 TB |
1129 | addr_map_entry_remove(this->addrs, addr, iface); |
1130 | addr_entry_destroy(addr); | |
507f26f6 | 1131 | } |
c6b40158 TB |
1132 | } |
1133 | else | |
1134 | { | |
507f26f6 TB |
1135 | if (hdr->nlmsg_type == RTM_NEWADDR) |
1136 | { | |
c6b40158 TB |
1137 | found = TRUE; |
1138 | changed = TRUE; | |
1139 | route_ifname = strdup(iface->ifname); | |
1140 | INIT(addr, | |
1141 | .ip = host->clone(host), | |
3bf98189 | 1142 | .flags = msg->ifa_flags, |
c6b40158 TB |
1143 | .scope = msg->ifa_scope, |
1144 | ); | |
1145 | iface->addrs->insert_last(iface->addrs, addr); | |
1146 | addr_map_entry_add(this->addrs, addr, iface); | |
1147 | if (event && iface->usable) | |
507f26f6 | 1148 | { |
c6b40158 | 1149 | DBG1(DBG_KNL, "%H appeared on %s", host, iface->ifname); |
507f26f6 TB |
1150 | } |
1151 | } | |
c6b40158 TB |
1152 | } |
1153 | if (found && (iface->flags & IFF_UP)) | |
1154 | { | |
1155 | update = TRUE; | |
1156 | } | |
1157 | if (!iface->usable) | |
1158 | { /* ignore events for interfaces excluded by config */ | |
1159 | update = changed = FALSE; | |
507f26f6 TB |
1160 | } |
1161 | } | |
a25d536e | 1162 | this->lock->unlock(this->lock); |
f834249c TB |
1163 | |
1164 | if (update && event && route_ifname) | |
1165 | { | |
c732e220 | 1166 | queue_route_reinstall(this, route_ifname); |
f834249c TB |
1167 | } |
1168 | else | |
1169 | { | |
1170 | free(route_ifname); | |
1171 | } | |
507f26f6 | 1172 | host->destroy(host); |
7daf5226 | 1173 | |
507f26f6 TB |
1174 | /* send an update to all IKE_SAs */ |
1175 | if (update && event && changed) | |
1176 | { | |
ba26508d | 1177 | fire_roam_event(this, TRUE); |
507f26f6 TB |
1178 | } |
1179 | } | |
1180 | ||
1181 | /** | |
1182 | * process RTM_NEWROUTE and RTM_DELROUTE from kernel | |
1183 | */ | |
1184 | static void process_route(private_kernel_netlink_net_t *this, struct nlmsghdr *hdr) | |
1185 | { | |
1186 | struct rtmsg* msg = (struct rtmsg*)(NLMSG_DATA(hdr)); | |
1187 | struct rtattr *rta = RTM_RTA(msg); | |
1188 | size_t rtasize = RTM_PAYLOAD(hdr); | |
29607690 | 1189 | u_int32_t rta_oif = 0; |
507f26f6 | 1190 | host_t *host = NULL; |
7daf5226 | 1191 | |
ec0c756d TB |
1192 | /* ignore routes added by us or in the local routing table (local addrs) */ |
1193 | if (msg->rtm_table && (msg->rtm_table == this->routing_table || | |
1194 | msg->rtm_table == RT_TABLE_LOCAL)) | |
85be7e5b MW |
1195 | { |
1196 | return; | |
1197 | } | |
8ec51f83 TB |
1198 | else if (msg->rtm_flags & RTM_F_CLONED) |
1199 | { /* ignore cached routes, seem to be created a lot for IPv6 */ | |
1200 | return; | |
1201 | } | |
7daf5226 | 1202 | |
507f26f6 TB |
1203 | while (RTA_OK(rta, rtasize)) |
1204 | { | |
1205 | switch (rta->rta_type) | |
1206 | { | |
1207 | case RTA_PREFSRC: | |
862ef49f | 1208 | DESTROY_IF(host); |
507f26f6 TB |
1209 | host = host_create_from_chunk(msg->rtm_family, |
1210 | chunk_create(RTA_DATA(rta), RTA_PAYLOAD(rta)), 0); | |
1211 | break; | |
29607690 TB |
1212 | case RTA_OIF: |
1213 | if (RTA_PAYLOAD(rta) == sizeof(rta_oif)) | |
1214 | { | |
1215 | rta_oif = *(u_int32_t*)RTA_DATA(rta); | |
1216 | } | |
1217 | break; | |
507f26f6 TB |
1218 | } |
1219 | rta = RTA_NEXT(rta, rtasize); | |
1220 | } | |
a25d536e | 1221 | this->lock->read_lock(this->lock); |
940e1b0f TB |
1222 | if (rta_oif && !is_interface_up_and_usable(this, rta_oif)) |
1223 | { /* ignore route changes for interfaces that are ignored or down */ | |
a25d536e | 1224 | this->lock->unlock(this->lock); |
940e1b0f TB |
1225 | DESTROY_IF(host); |
1226 | return; | |
1227 | } | |
29607690 TB |
1228 | if (!host && rta_oif) |
1229 | { | |
3bf98189 TB |
1230 | host = get_interface_address(this, rta_oif, msg->rtm_family, |
1231 | NULL, NULL); | |
29607690 | 1232 | } |
a25d536e TB |
1233 | if (!host || is_known_vip(this, host)) |
1234 | { /* ignore routes added for virtual IPs */ | |
1235 | this->lock->unlock(this->lock); | |
1236 | DESTROY_IF(host); | |
1237 | return; | |
507f26f6 | 1238 | } |
a25d536e TB |
1239 | this->lock->unlock(this->lock); |
1240 | fire_roam_event(this, FALSE); | |
1241 | host->destroy(host); | |
507f26f6 TB |
1242 | } |
1243 | ||
1244 | /** | |
1245 | * Receives events from kernel | |
1246 | */ | |
f4f77d74 MW |
1247 | static bool receive_events(private_kernel_netlink_net_t *this, int fd, |
1248 | watcher_event_t event) | |
507f26f6 | 1249 | { |
ec331a7d | 1250 | char response[1536]; |
507f26f6 TB |
1251 | struct nlmsghdr *hdr = (struct nlmsghdr*)response; |
1252 | struct sockaddr_nl addr; | |
1253 | socklen_t addr_len = sizeof(addr); | |
4a5a5dd2 | 1254 | int len; |
7daf5226 | 1255 | |
f4f77d74 MW |
1256 | len = recvfrom(this->socket_events, response, sizeof(response), |
1257 | MSG_DONTWAIT, (struct sockaddr*)&addr, &addr_len); | |
507f26f6 TB |
1258 | if (len < 0) |
1259 | { | |
1260 | switch (errno) | |
1261 | { | |
1262 | case EINTR: | |
1263 | /* interrupted, try again */ | |
f4f77d74 | 1264 | return TRUE; |
507f26f6 TB |
1265 | case EAGAIN: |
1266 | /* no data ready, select again */ | |
f4f77d74 | 1267 | return TRUE; |
507f26f6 TB |
1268 | default: |
1269 | DBG1(DBG_KNL, "unable to receive from rt event socket"); | |
1270 | sleep(1); | |
f4f77d74 | 1271 | return TRUE; |
507f26f6 TB |
1272 | } |
1273 | } | |
7daf5226 | 1274 | |
507f26f6 TB |
1275 | if (addr.nl_pid != 0) |
1276 | { /* not from kernel. not interested, try another one */ | |
f4f77d74 | 1277 | return TRUE; |
507f26f6 | 1278 | } |
7daf5226 | 1279 | |
507f26f6 TB |
1280 | while (NLMSG_OK(hdr, len)) |
1281 | { | |
1282 | /* looks good so far, dispatch netlink message */ | |
1283 | switch (hdr->nlmsg_type) | |
1284 | { | |
1285 | case RTM_NEWADDR: | |
1286 | case RTM_DELADDR: | |
1287 | process_addr(this, hdr, TRUE); | |
507f26f6 TB |
1288 | break; |
1289 | case RTM_NEWLINK: | |
1290 | case RTM_DELLINK: | |
1291 | process_link(this, hdr, TRUE); | |
507f26f6 TB |
1292 | break; |
1293 | case RTM_NEWROUTE: | |
1294 | case RTM_DELROUTE: | |
1295 | if (this->process_route) | |
1296 | { | |
1297 | process_route(this, hdr); | |
1298 | } | |
1299 | break; | |
1300 | default: | |
1301 | break; | |
1302 | } | |
1303 | hdr = NLMSG_NEXT(hdr, len); | |
1304 | } | |
f4f77d74 | 1305 | return TRUE; |
507f26f6 TB |
1306 | } |
1307 | ||
1308 | /** enumerator over addresses */ | |
1309 | typedef struct { | |
1310 | private_kernel_netlink_net_t* this; | |
4106aea8 TB |
1311 | /** which addresses to enumerate */ |
1312 | kernel_address_type_t which; | |
507f26f6 TB |
1313 | } address_enumerator_t; |
1314 | ||
1315 | /** | |
1316 | * cleanup function for address enumerator | |
1317 | */ | |
1318 | static void address_enumerator_destroy(address_enumerator_t *data) | |
1319 | { | |
a25d536e | 1320 | data->this->lock->unlock(data->this->lock); |
507f26f6 TB |
1321 | free(data); |
1322 | } | |
1323 | ||
1324 | /** | |
1325 | * filter for addresses | |
1326 | */ | |
887abfb1 MW |
1327 | static bool filter_addresses(address_enumerator_t *data, |
1328 | addr_entry_t** in, host_t** out) | |
507f26f6 | 1329 | { |
c6b40158 | 1330 | if (!(data->which & ADDR_TYPE_VIRTUAL) && (*in)->refcount) |
507f26f6 TB |
1331 | { /* skip virtual interfaces added by us */ |
1332 | return FALSE; | |
1333 | } | |
1a2a8bff MW |
1334 | if (!(data->which & ADDR_TYPE_REGULAR) && !(*in)->refcount) |
1335 | { /* address is regular, but not requested */ | |
1336 | return FALSE; | |
1337 | } | |
507f26f6 TB |
1338 | if ((*in)->scope >= RT_SCOPE_LINK) |
1339 | { /* skip addresses with a unusable scope */ | |
1340 | return FALSE; | |
1341 | } | |
1342 | *out = (*in)->ip; | |
1343 | return TRUE; | |
1344 | } | |
1345 | ||
1346 | /** | |
1347 | * enumerator constructor for interfaces | |
1348 | */ | |
887abfb1 MW |
1349 | static enumerator_t *create_iface_enumerator(iface_entry_t *iface, |
1350 | address_enumerator_t *data) | |
507f26f6 | 1351 | { |
887abfb1 MW |
1352 | return enumerator_create_filter( |
1353 | iface->addrs->create_enumerator(iface->addrs), | |
507f26f6 TB |
1354 | (void*)filter_addresses, data, NULL); |
1355 | } | |
1356 | ||
1357 | /** | |
1358 | * filter for interfaces | |
1359 | */ | |
887abfb1 MW |
1360 | static bool filter_interfaces(address_enumerator_t *data, iface_entry_t** in, |
1361 | iface_entry_t** out) | |
507f26f6 | 1362 | { |
4106aea8 | 1363 | if (!(data->which & ADDR_TYPE_IGNORED) && !(*in)->usable) |
940e1b0f TB |
1364 | { /* skip interfaces excluded by config */ |
1365 | return FALSE; | |
1366 | } | |
4106aea8 | 1367 | if (!(data->which & ADDR_TYPE_LOOPBACK) && ((*in)->flags & IFF_LOOPBACK)) |
aed33805 TB |
1368 | { /* ignore loopback devices */ |
1369 | return FALSE; | |
1370 | } | |
4106aea8 | 1371 | if (!(data->which & ADDR_TYPE_DOWN) && !((*in)->flags & IFF_UP)) |
507f26f6 TB |
1372 | { /* skip interfaces not up */ |
1373 | return FALSE; | |
1374 | } | |
1375 | *out = *in; | |
1376 | return TRUE; | |
1377 | } | |
1378 | ||
887abfb1 | 1379 | METHOD(kernel_net_t, create_address_enumerator, enumerator_t*, |
4106aea8 | 1380 | private_kernel_netlink_net_t *this, kernel_address_type_t which) |
507f26f6 | 1381 | { |
1a2a8bff MW |
1382 | address_enumerator_t *data; |
1383 | ||
1384 | INIT(data, | |
1385 | .this = this, | |
1386 | .which = which, | |
1387 | ); | |
7daf5226 | 1388 | |
a25d536e | 1389 | this->lock->read_lock(this->lock); |
507f26f6 | 1390 | return enumerator_create_nested( |
887abfb1 MW |
1391 | enumerator_create_filter( |
1392 | this->ifaces->create_enumerator(this->ifaces), | |
1393 | (void*)filter_interfaces, data, NULL), | |
1394 | (void*)create_iface_enumerator, data, | |
1395 | (void*)address_enumerator_destroy); | |
507f26f6 TB |
1396 | } |
1397 | ||
9ba36c0f TB |
1398 | METHOD(kernel_net_t, get_interface_name, bool, |
1399 | private_kernel_netlink_net_t *this, host_t* ip, char **name) | |
507f26f6 | 1400 | { |
1f97e1aa TB |
1401 | addr_map_entry_t *entry, lookup = { |
1402 | .ip = ip, | |
1403 | }; | |
7daf5226 | 1404 | |
645d7a5e TB |
1405 | if (ip->is_anyaddr(ip)) |
1406 | { | |
1407 | return FALSE; | |
1408 | } | |
a25d536e | 1409 | this->lock->read_lock(this->lock); |
1f97e1aa TB |
1410 | /* first try to find it on an up and usable interface */ |
1411 | entry = this->addrs->get_match(this->addrs, &lookup, | |
1412 | (void*)addr_map_entry_match_up_and_usable); | |
1413 | if (entry) | |
507f26f6 | 1414 | { |
1f97e1aa | 1415 | if (name) |
507f26f6 | 1416 | { |
1f97e1aa TB |
1417 | *name = strdup(entry->iface->ifname); |
1418 | DBG2(DBG_KNL, "%H is on interface %s", ip, *name); | |
507f26f6 | 1419 | } |
a25d536e | 1420 | this->lock->unlock(this->lock); |
1f97e1aa | 1421 | return TRUE; |
507f26f6 | 1422 | } |
544c2e3d MW |
1423 | /* in a second step, consider virtual IPs installed by us */ |
1424 | entry = this->vips->get_match(this->vips, &lookup, | |
1425 | (void*)addr_map_entry_match_up_and_usable); | |
1426 | if (entry) | |
1427 | { | |
1428 | if (name) | |
1429 | { | |
1430 | *name = strdup(entry->iface->ifname); | |
5310f485 | 1431 | DBG2(DBG_KNL, "virtual IP %H is on interface %s", ip, *name); |
544c2e3d MW |
1432 | } |
1433 | this->lock->unlock(this->lock); | |
1434 | return TRUE; | |
1435 | } | |
1f97e1aa TB |
1436 | /* maybe it is installed on an ignored interface */ |
1437 | entry = this->addrs->get_match(this->addrs, &lookup, | |
1438 | (void*)addr_map_entry_match_up); | |
1439 | if (!entry) | |
507f26f6 | 1440 | { |
1f97e1aa | 1441 | DBG2(DBG_KNL, "%H is not a local address or the interface is down", ip); |
507f26f6 | 1442 | } |
a25d536e | 1443 | this->lock->unlock(this->lock); |
1f97e1aa | 1444 | return FALSE; |
507f26f6 TB |
1445 | } |
1446 | ||
1447 | /** | |
1448 | * get the index of an interface by name | |
1449 | */ | |
1450 | static int get_interface_index(private_kernel_netlink_net_t *this, char* name) | |
1451 | { | |
507f26f6 TB |
1452 | iface_entry_t *iface; |
1453 | int ifindex = 0; | |
7daf5226 | 1454 | |
507f26f6 | 1455 | DBG2(DBG_KNL, "getting iface index for %s", name); |
7daf5226 | 1456 | |
a25d536e | 1457 | this->lock->read_lock(this->lock); |
c6b40158 TB |
1458 | if (this->ifaces->find_first(this->ifaces, (void*)iface_entry_by_name, |
1459 | (void**)&iface, name) == SUCCESS) | |
507f26f6 | 1460 | { |
c6b40158 | 1461 | ifindex = iface->ifindex; |
507f26f6 | 1462 | } |
a25d536e | 1463 | this->lock->unlock(this->lock); |
507f26f6 TB |
1464 | |
1465 | if (ifindex == 0) | |
1466 | { | |
1467 | DBG1(DBG_KNL, "unable to get interface index for %s", name); | |
1468 | } | |
1469 | return ifindex; | |
1470 | } | |
1471 | ||
1472 | /** | |
de7cb6de TB |
1473 | * check if an address or net (addr with prefix net bits) is in |
1474 | * subnet (net with net_len net bits) | |
507f26f6 | 1475 | */ |
de7cb6de | 1476 | static bool addr_in_subnet(chunk_t addr, int prefix, chunk_t net, int net_len) |
507f26f6 | 1477 | { |
03d5f411 AS |
1478 | static const u_char mask[] = { 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe }; |
1479 | int byte = 0; | |
7daf5226 | 1480 | |
d1769942 MW |
1481 | if (net_len == 0) |
1482 | { /* any address matches a /0 network */ | |
1483 | return TRUE; | |
1484 | } | |
de7cb6de | 1485 | if (addr.len != net.len || net_len > 8 * net.len || prefix < net_len) |
507f26f6 TB |
1486 | { |
1487 | return FALSE; | |
1488 | } | |
03d5f411 AS |
1489 | /* scan through all bytes in network order */ |
1490 | while (net_len > 0) | |
507f26f6 | 1491 | { |
03d5f411 | 1492 | if (net_len < 8) |
507f26f6 | 1493 | { |
03d5f411 AS |
1494 | return (mask[net_len] & addr.ptr[byte]) == (mask[net_len] & net.ptr[byte]); |
1495 | } | |
1496 | else | |
1497 | { | |
1498 | if (addr.ptr[byte] != net.ptr[byte]) | |
507f26f6 TB |
1499 | { |
1500 | return FALSE; | |
1501 | } | |
03d5f411 AS |
1502 | byte++; |
1503 | net_len -= 8; | |
507f26f6 TB |
1504 | } |
1505 | } | |
1506 | return TRUE; | |
1507 | } | |
1508 | ||
66253465 TB |
1509 | /** |
1510 | * Store information about a route retrieved via RTNETLINK | |
1511 | */ | |
1512 | typedef struct { | |
1513 | chunk_t gtw; | |
1514 | chunk_t src; | |
1515 | chunk_t dst; | |
1516 | host_t *src_host; | |
1517 | u_int8_t dst_len; | |
1518 | u_int32_t table; | |
1519 | u_int32_t oif; | |
1520 | } rt_entry_t; | |
1521 | ||
1522 | /** | |
1523 | * Free a route entry | |
1524 | */ | |
1525 | static void rt_entry_destroy(rt_entry_t *this) | |
1526 | { | |
1527 | DESTROY_IF(this->src_host); | |
1528 | free(this); | |
1529 | } | |
1530 | ||
1531 | /** | |
1532 | * Parse route received with RTM_NEWROUTE. The given rt_entry_t object will be | |
1533 | * reused if not NULL. | |
1534 | * | |
1535 | * Returned chunks point to internal data of the Netlink message. | |
1536 | */ | |
1537 | static rt_entry_t *parse_route(struct nlmsghdr *hdr, rt_entry_t *route) | |
1538 | { | |
1539 | struct rtattr *rta; | |
1540 | struct rtmsg *msg; | |
1541 | size_t rtasize; | |
1542 | ||
1543 | msg = (struct rtmsg*)(NLMSG_DATA(hdr)); | |
1544 | rta = RTM_RTA(msg); | |
1545 | rtasize = RTM_PAYLOAD(hdr); | |
1546 | ||
1547 | if (route) | |
1548 | { | |
1549 | route->gtw = chunk_empty; | |
1550 | route->src = chunk_empty; | |
1551 | route->dst = chunk_empty; | |
1552 | route->dst_len = msg->rtm_dst_len; | |
1553 | route->table = msg->rtm_table; | |
1554 | route->oif = 0; | |
1555 | } | |
1556 | else | |
1557 | { | |
1558 | INIT(route, | |
1559 | .dst_len = msg->rtm_dst_len, | |
1560 | .table = msg->rtm_table, | |
1561 | ); | |
1562 | } | |
1563 | ||
1564 | while (RTA_OK(rta, rtasize)) | |
1565 | { | |
1566 | switch (rta->rta_type) | |
1567 | { | |
1568 | case RTA_PREFSRC: | |
1569 | route->src = chunk_create(RTA_DATA(rta), RTA_PAYLOAD(rta)); | |
1570 | break; | |
1571 | case RTA_GATEWAY: | |
1572 | route->gtw = chunk_create(RTA_DATA(rta), RTA_PAYLOAD(rta)); | |
1573 | break; | |
1574 | case RTA_DST: | |
1575 | route->dst = chunk_create(RTA_DATA(rta), RTA_PAYLOAD(rta)); | |
1576 | break; | |
1577 | case RTA_OIF: | |
1578 | if (RTA_PAYLOAD(rta) == sizeof(route->oif)) | |
1579 | { | |
1580 | route->oif = *(u_int32_t*)RTA_DATA(rta); | |
1581 | } | |
1582 | break; | |
1583 | #ifdef HAVE_RTA_TABLE | |
1584 | case RTA_TABLE: | |
1585 | if (RTA_PAYLOAD(rta) == sizeof(route->table)) | |
1586 | { | |
1587 | route->table = *(u_int32_t*)RTA_DATA(rta); | |
1588 | } | |
1589 | break; | |
1590 | #endif /* HAVE_RTA_TABLE*/ | |
1591 | } | |
1592 | rta = RTA_NEXT(rta, rtasize); | |
1593 | } | |
1594 | return route; | |
1595 | } | |
1596 | ||
507f26f6 TB |
1597 | /** |
1598 | * Get a route: If "nexthop", the nexthop is returned. source addr otherwise. | |
1599 | */ | |
1600 | static host_t *get_route(private_kernel_netlink_net_t *this, host_t *dest, | |
de7cb6de TB |
1601 | int prefix, bool nexthop, host_t *candidate, |
1602 | u_int recursion) | |
507f26f6 | 1603 | { |
21bf86f7 | 1604 | netlink_buf_t request; |
507f26f6 TB |
1605 | struct nlmsghdr *hdr, *out, *current; |
1606 | struct rtmsg *msg; | |
1607 | chunk_t chunk; | |
1608 | size_t len; | |
66253465 TB |
1609 | linked_list_t *routes; |
1610 | rt_entry_t *route = NULL, *best = NULL; | |
d266e895 | 1611 | enumerator_t *enumerator; |
66253465 | 1612 | host_t *addr = NULL; |
de7cb6de TB |
1613 | bool match_net; |
1614 | int family; | |
7daf5226 | 1615 | |
cbd52e7d TB |
1616 | if (recursion > MAX_ROUTE_RECURSION) |
1617 | { | |
1618 | return NULL; | |
1619 | } | |
de7cb6de TB |
1620 | chunk = dest->get_address(dest); |
1621 | len = chunk.len * 8; | |
1622 | prefix = prefix < 0 ? len : min(prefix, len); | |
1623 | match_net = prefix != len; | |
cbd52e7d | 1624 | |
507f26f6 TB |
1625 | memset(&request, 0, sizeof(request)); |
1626 | ||
de7cb6de | 1627 | family = dest->get_family(dest); |
507f26f6 | 1628 | hdr = (struct nlmsghdr*)request; |
5be75c2c | 1629 | hdr->nlmsg_flags = NLM_F_REQUEST; |
de7cb6de TB |
1630 | if (family == AF_INET || this->rta_prefsrc_for_ipv6 || |
1631 | this->routing_table || match_net) | |
7beb31aa TB |
1632 | { /* kernels prior to 3.0 do not support RTA_PREFSRC for IPv6 routes. |
1633 | * as we want to ignore routes with virtual IPs we cannot use DUMP | |
1634 | * if these routes are not installed in a separate table */ | |
5c1332bf | 1635 | hdr->nlmsg_flags |= NLM_F_DUMP; |
5be75c2c | 1636 | } |
507f26f6 TB |
1637 | hdr->nlmsg_type = RTM_GETROUTE; |
1638 | hdr->nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)); | |
1639 | ||
1640 | msg = (struct rtmsg*)NLMSG_DATA(hdr); | |
de7cb6de | 1641 | msg->rtm_family = family; |
ce5b1708 MW |
1642 | if (candidate) |
1643 | { | |
1644 | chunk = candidate->get_address(candidate); | |
1645 | netlink_add_attribute(hdr, RTA_PREFSRC, chunk, sizeof(request)); | |
1646 | } | |
de7cb6de TB |
1647 | if (!match_net) |
1648 | { | |
1649 | chunk = dest->get_address(dest); | |
1650 | netlink_add_attribute(hdr, RTA_DST, chunk, sizeof(request)); | |
1651 | } | |
7daf5226 | 1652 | |
507f26f6 TB |
1653 | if (this->socket->send(this->socket, hdr, &out, &len) != SUCCESS) |
1654 | { | |
de7cb6de TB |
1655 | DBG2(DBG_KNL, "getting %s to reach %H/%d failed", |
1656 | nexthop ? "nexthop" : "address", dest, prefix); | |
507f26f6 TB |
1657 | return NULL; |
1658 | } | |
66253465 | 1659 | routes = linked_list_create(); |
a25d536e | 1660 | this->lock->read_lock(this->lock); |
36b7ba5e MW |
1661 | |
1662 | for (current = out; NLMSG_OK(current, len); | |
1663 | current = NLMSG_NEXT(current, len)) | |
507f26f6 TB |
1664 | { |
1665 | switch (current->nlmsg_type) | |
1666 | { | |
1667 | case NLMSG_DONE: | |
1668 | break; | |
1669 | case RTM_NEWROUTE: | |
1670 | { | |
66253465 | 1671 | rt_entry_t *other; |
d266e895 | 1672 | uintptr_t table; |
7daf5226 | 1673 | |
66253465 TB |
1674 | route = parse_route(current, route); |
1675 | ||
1676 | table = (uintptr_t)route->table; | |
1677 | if (this->rt_exclude->find_first(this->rt_exclude, NULL, | |
1678 | (void**)&table) == SUCCESS) | |
1679 | { /* route is from an excluded routing table */ | |
d266e895 TE |
1680 | continue; |
1681 | } | |
fb6c8591 | 1682 | if (this->routing_table != 0 && |
66253465 | 1683 | route->table == this->routing_table) |
fb6c8591 | 1684 | { /* route is from our own ipsec routing table */ |
36b7ba5e | 1685 | continue; |
fb6c8591 | 1686 | } |
940e1b0f | 1687 | if (route->oif && !is_interface_up_and_usable(this, route->oif)) |
d1769942 | 1688 | { /* interface is down */ |
36b7ba5e | 1689 | continue; |
fb6c8591 | 1690 | } |
de7cb6de | 1691 | if (!addr_in_subnet(chunk, prefix, route->dst, route->dst_len)) |
d1769942 | 1692 | { /* route destination does not contain dest */ |
36b7ba5e | 1693 | continue; |
fb6c8591 | 1694 | } |
66253465 TB |
1695 | if (route->src.ptr) |
1696 | { /* verify source address, if any */ | |
1697 | host_t *src = host_create_from_chunk(msg->rtm_family, | |
1698 | route->src, 0); | |
c6b40158 | 1699 | if (src && is_known_vip(this, src)) |
66253465 TB |
1700 | { /* ignore routes installed by us */ |
1701 | src->destroy(src); | |
1702 | continue; | |
507f26f6 | 1703 | } |
66253465 | 1704 | route->src_host = src; |
fb6c8591 | 1705 | } |
66253465 TB |
1706 | /* insert route, sorted by decreasing network prefix */ |
1707 | enumerator = routes->create_enumerator(routes); | |
1708 | while (enumerator->enumerate(enumerator, &other)) | |
1709 | { | |
1710 | if (route->dst_len > other->dst_len) | |
507f26f6 | 1711 | { |
66253465 | 1712 | break; |
507f26f6 TB |
1713 | } |
1714 | } | |
66253465 TB |
1715 | routes->insert_before(routes, enumerator, route); |
1716 | enumerator->destroy(enumerator); | |
1717 | route = NULL; | |
36b7ba5e | 1718 | continue; |
507f26f6 TB |
1719 | } |
1720 | default: | |
507f26f6 TB |
1721 | continue; |
1722 | } | |
1723 | break; | |
1724 | } | |
66253465 TB |
1725 | if (route) |
1726 | { | |
1727 | rt_entry_destroy(route); | |
1728 | } | |
1729 | ||
1730 | /* now we have a list of routes matching dest, sorted by net prefix. | |
1731 | * we will look for source addresses for these routes and select the one | |
1732 | * with the preferred source address, if possible */ | |
1733 | enumerator = routes->create_enumerator(routes); | |
1734 | while (enumerator->enumerate(enumerator, &route)) | |
1735 | { | |
1736 | if (route->src_host) | |
1737 | { /* got a source address with the route, if no preferred source | |
1738 | * is given or it matches we are done, as this is the best route */ | |
1739 | if (!candidate || candidate->ip_equals(candidate, route->src_host)) | |
1740 | { | |
1741 | best = route; | |
1742 | break; | |
1743 | } | |
1744 | else if (route->oif) | |
1745 | { /* no match yet, maybe it is assigned to the same interface */ | |
1746 | host_t *src = get_interface_address(this, route->oif, | |
3bf98189 | 1747 | msg->rtm_family, dest, candidate); |
66253465 TB |
1748 | if (src && src->ip_equals(src, candidate)) |
1749 | { | |
1750 | route->src_host->destroy(route->src_host); | |
1751 | route->src_host = src; | |
1752 | best = route; | |
1753 | break; | |
1754 | } | |
1755 | DESTROY_IF(src); | |
1756 | } | |
1757 | /* no luck yet with the source address. if this is the best (first) | |
1758 | * route we store it as fallback in case we don't find a route with | |
1759 | * the preferred source */ | |
1760 | best = best ?: route; | |
1761 | continue; | |
1762 | } | |
1763 | if (route->oif) | |
1764 | { /* no src, but an interface - get address from it */ | |
1765 | route->src_host = get_interface_address(this, route->oif, | |
3bf98189 | 1766 | msg->rtm_family, dest, candidate); |
66253465 TB |
1767 | if (route->src_host) |
1768 | { /* we handle this address the same as the one above */ | |
1769 | if (!candidate || | |
1770 | candidate->ip_equals(candidate, route->src_host)) | |
1771 | { | |
1772 | best = route; | |
1773 | break; | |
1774 | } | |
1775 | best = best ?: route; | |
1776 | continue; | |
1777 | } | |
1778 | } | |
1779 | if (route->gtw.ptr) | |
1780 | { /* no src, no iface, but a gateway - lookup src to reach gtw */ | |
1781 | host_t *gtw; | |
1782 | ||
1783 | gtw = host_create_from_chunk(msg->rtm_family, route->gtw, 0); | |
5be88ca6 TB |
1784 | if (gtw && !gtw->ip_equals(gtw, dest)) |
1785 | { | |
de7cb6de | 1786 | route->src_host = get_route(this, gtw, -1, FALSE, candidate, |
cbd52e7d | 1787 | recursion + 1); |
5be88ca6 TB |
1788 | } |
1789 | DESTROY_IF(gtw); | |
66253465 TB |
1790 | if (route->src_host) |
1791 | { /* more of the same */ | |
1792 | if (!candidate || | |
1793 | candidate->ip_equals(candidate, route->src_host)) | |
1794 | { | |
1795 | best = route; | |
1796 | break; | |
1797 | } | |
1798 | best = best ?: route; | |
1799 | } | |
1800 | } | |
1801 | } | |
1802 | enumerator->destroy(enumerator); | |
7daf5226 | 1803 | |
507f26f6 | 1804 | if (nexthop) |
66253465 TB |
1805 | { /* nexthop lookup, return gateway if any */ |
1806 | if (best || routes->get_first(routes, (void**)&best) == SUCCESS) | |
1807 | { | |
1808 | addr = host_create_from_chunk(msg->rtm_family, best->gtw, 0); | |
1809 | } | |
de7cb6de TB |
1810 | if (!addr && !match_net) |
1811 | { /* fallback to destination address */ | |
1812 | addr = dest->clone(dest); | |
1813 | } | |
66253465 TB |
1814 | } |
1815 | else | |
507f26f6 | 1816 | { |
66253465 | 1817 | if (best) |
507f26f6 | 1818 | { |
66253465 | 1819 | addr = best->src_host->clone(best->src_host); |
507f26f6 | 1820 | } |
507f26f6 | 1821 | } |
a25d536e | 1822 | this->lock->unlock(this->lock); |
66253465 TB |
1823 | routes->destroy_function(routes, (void*)rt_entry_destroy); |
1824 | free(out); | |
1825 | ||
1826 | if (addr) | |
1827 | { | |
de7cb6de TB |
1828 | DBG2(DBG_KNL, "using %H as %s to reach %H/%d", addr, |
1829 | nexthop ? "nexthop" : "address", dest, prefix); | |
66253465 | 1830 | } |
cbd52e7d | 1831 | else if (!recursion) |
66253465 | 1832 | { |
de7cb6de TB |
1833 | DBG2(DBG_KNL, "no %s found to reach %H/%d", |
1834 | nexthop ? "nexthop" : "address", dest, prefix); | |
66253465 TB |
1835 | } |
1836 | return addr; | |
507f26f6 TB |
1837 | } |
1838 | ||
887abfb1 MW |
1839 | METHOD(kernel_net_t, get_source_addr, host_t*, |
1840 | private_kernel_netlink_net_t *this, host_t *dest, host_t *src) | |
507f26f6 | 1841 | { |
de7cb6de | 1842 | return get_route(this, dest, -1, FALSE, src, 0); |
507f26f6 TB |
1843 | } |
1844 | ||
887abfb1 | 1845 | METHOD(kernel_net_t, get_nexthop, host_t*, |
c005073d | 1846 | private_kernel_netlink_net_t *this, host_t *dest, int prefix, host_t *src) |
507f26f6 | 1847 | { |
de7cb6de | 1848 | return get_route(this, dest, prefix, TRUE, src, 0); |
507f26f6 TB |
1849 | } |
1850 | ||
1851 | /** | |
1852 | * Manages the creation and deletion of ip addresses on an interface. | |
1853 | * By setting the appropriate nlmsg_type, the ip will be set or unset. | |
1854 | */ | |
1855 | static status_t manage_ipaddr(private_kernel_netlink_net_t *this, int nlmsg_type, | |
50bd7558 | 1856 | int flags, int if_index, host_t *ip, int prefix) |
507f26f6 | 1857 | { |
21bf86f7 | 1858 | netlink_buf_t request; |
507f26f6 TB |
1859 | struct nlmsghdr *hdr; |
1860 | struct ifaddrmsg *msg; | |
1861 | chunk_t chunk; | |
7daf5226 | 1862 | |
507f26f6 | 1863 | memset(&request, 0, sizeof(request)); |
7daf5226 | 1864 | |
507f26f6 | 1865 | chunk = ip->get_address(ip); |
7daf5226 | 1866 | |
323f9f99 | 1867 | hdr = (struct nlmsghdr*)request; |
507f26f6 | 1868 | hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK | flags; |
7daf5226 | 1869 | hdr->nlmsg_type = nlmsg_type; |
507f26f6 | 1870 | hdr->nlmsg_len = NLMSG_LENGTH(sizeof(struct ifaddrmsg)); |
7daf5226 | 1871 | |
507f26f6 | 1872 | msg = (struct ifaddrmsg*)NLMSG_DATA(hdr); |
323f9f99 MW |
1873 | msg->ifa_family = ip->get_family(ip); |
1874 | msg->ifa_flags = 0; | |
50bd7558 | 1875 | msg->ifa_prefixlen = prefix < 0 ? chunk.len * 8 : prefix; |
323f9f99 MW |
1876 | msg->ifa_scope = RT_SCOPE_UNIVERSE; |
1877 | msg->ifa_index = if_index; | |
7daf5226 | 1878 | |
507f26f6 TB |
1879 | netlink_add_attribute(hdr, IFA_LOCAL, chunk, sizeof(request)); |
1880 | ||
90854d28 TB |
1881 | if (ip->get_family(ip) == AF_INET6 && this->rta_prefsrc_for_ipv6) |
1882 | { /* if source routes are possible we let the virtual IP get deprecated | |
1883 | * immediately (but mark it as valid forever) so it gets only used if | |
1884 | * forced by our route, and not by the default IPv6 address selection */ | |
1885 | struct ifa_cacheinfo cache = { | |
1886 | .ifa_valid = 0xFFFFFFFF, | |
1887 | .ifa_prefered = 0, | |
1888 | }; | |
1889 | netlink_add_attribute(hdr, IFA_CACHEINFO, chunk_from_thing(cache), | |
1890 | sizeof(request)); | |
1891 | } | |
507f26f6 TB |
1892 | return this->socket->send_ack(this->socket, hdr); |
1893 | } | |
1894 | ||
887abfb1 | 1895 | METHOD(kernel_net_t, add_ip, status_t, |
50bd7558 | 1896 | private_kernel_netlink_net_t *this, host_t *virtual_ip, int prefix, |
b185cdd1 | 1897 | char *iface_name) |
507f26f6 | 1898 | { |
c6b40158 TB |
1899 | addr_map_entry_t *entry, lookup = { |
1900 | .ip = virtual_ip, | |
1901 | }; | |
e8e9048f | 1902 | iface_entry_t *iface = NULL; |
7daf5226 | 1903 | |
9474a0d9 MW |
1904 | if (!this->install_virtual_ip) |
1905 | { /* disabled by config */ | |
1906 | return SUCCESS; | |
1907 | } | |
7daf5226 | 1908 | |
a25d536e | 1909 | this->lock->write_lock(this->lock); |
c6b40158 TB |
1910 | /* the virtual IP might actually be installed as regular IP, in which case |
1911 | * we don't track it as virtual IP */ | |
1912 | entry = this->addrs->get_match(this->addrs, &lookup, | |
1913 | (void*)addr_map_entry_match); | |
1914 | if (!entry) | |
1915 | { /* otherwise it might already be installed as virtual IP */ | |
1916 | entry = this->vips->get_match(this->vips, &lookup, | |
1917 | (void*)addr_map_entry_match); | |
1918 | if (entry) | |
1919 | { /* the vip we found can be in one of three states: 1) installed and | |
1920 | * ready, 2) just added by another thread, but not yet confirmed to | |
1921 | * be installed by the kernel, 3) just deleted, but not yet gone. | |
1922 | * Then while we wait below, several things could happen (as we | |
a25d536e | 1923 | * release the lock). For instance, the interface could disappear, |
e8e9048f | 1924 | * or the IP is finally deleted, and it reappears on a different |
c6b40158 TB |
1925 | * interface. All these cases are handled by the call below. */ |
1926 | while (!is_vip_installed_or_gone(this, virtual_ip, &entry)) | |
507f26f6 | 1927 | { |
a25d536e | 1928 | this->condvar->wait(this->condvar, this->lock); |
507f26f6 | 1929 | } |
c6b40158 | 1930 | if (entry) |
507f26f6 | 1931 | { |
c6b40158 | 1932 | entry->addr->refcount++; |
507f26f6 TB |
1933 | } |
1934 | } | |
c6b40158 TB |
1935 | } |
1936 | if (entry) | |
1937 | { | |
1938 | DBG2(DBG_KNL, "virtual IP %H is already installed on %s", virtual_ip, | |
1939 | entry->iface->ifname); | |
a25d536e | 1940 | this->lock->unlock(this->lock); |
c6b40158 TB |
1941 | return SUCCESS; |
1942 | } | |
e8e9048f TB |
1943 | /* try to find the target interface, either by config or via src ip */ |
1944 | if (!this->install_virtual_ip_on || | |
1945 | this->ifaces->find_first(this->ifaces, (void*)iface_entry_by_name, | |
1946 | (void**)&iface, this->install_virtual_ip_on) != SUCCESS) | |
1947 | { | |
b185cdd1 MW |
1948 | if (this->ifaces->find_first(this->ifaces, (void*)iface_entry_by_name, |
1949 | (void**)&iface, iface_name) != SUCCESS) | |
e8e9048f TB |
1950 | { /* if we don't find the requested interface we just use the first */ |
1951 | this->ifaces->get_first(this->ifaces, (void**)&iface); | |
1952 | } | |
c6b40158 | 1953 | } |
c6b40158 TB |
1954 | if (iface) |
1955 | { | |
1956 | addr_entry_t *addr; | |
7daf5226 | 1957 | |
c6b40158 TB |
1958 | INIT(addr, |
1959 | .ip = virtual_ip->clone(virtual_ip), | |
1960 | .refcount = 1, | |
1961 | .scope = RT_SCOPE_UNIVERSE, | |
1962 | ); | |
1963 | iface->addrs->insert_last(iface->addrs, addr); | |
1964 | addr_map_entry_add(this->vips, addr, iface); | |
1965 | if (manage_ipaddr(this, RTM_NEWADDR, NLM_F_CREATE | NLM_F_EXCL, | |
50bd7558 | 1966 | iface->ifindex, virtual_ip, prefix) == SUCCESS) |
507f26f6 | 1967 | { |
c6b40158 TB |
1968 | while (!is_vip_installed_or_gone(this, virtual_ip, &entry)) |
1969 | { /* wait until address appears */ | |
a25d536e | 1970 | this->condvar->wait(this->condvar, this->lock); |
c6b40158 TB |
1971 | } |
1972 | if (entry) | |
1973 | { /* we fail if the interface got deleted in the meantime */ | |
e8e9048f TB |
1974 | DBG2(DBG_KNL, "virtual IP %H installed on %s", virtual_ip, |
1975 | entry->iface->ifname); | |
a25d536e | 1976 | this->lock->unlock(this->lock); |
3dc9d427 MW |
1977 | /* during IKEv1 reauthentication, children get moved from |
1978 | * old the new SA before the virtual IP is available. This | |
1979 | * kills the route for our virtual IP, reinstall. */ | |
cf6a4ea0 | 1980 | queue_route_reinstall(this, strdup(entry->iface->ifname)); |
507f26f6 TB |
1981 | return SUCCESS; |
1982 | } | |
507f26f6 | 1983 | } |
a25d536e | 1984 | this->lock->unlock(this->lock); |
c6b40158 TB |
1985 | DBG1(DBG_KNL, "adding virtual IP %H failed", virtual_ip); |
1986 | return FAILED; | |
507f26f6 | 1987 | } |
a25d536e | 1988 | this->lock->unlock(this->lock); |
c6b40158 TB |
1989 | DBG1(DBG_KNL, "no interface available, unable to install virtual IP %H", |
1990 | virtual_ip); | |
507f26f6 TB |
1991 | return FAILED; |
1992 | } | |
1993 | ||
887abfb1 | 1994 | METHOD(kernel_net_t, del_ip, status_t, |
d88597f0 MW |
1995 | private_kernel_netlink_net_t *this, host_t *virtual_ip, int prefix, |
1996 | bool wait) | |
507f26f6 | 1997 | { |
c6b40158 TB |
1998 | addr_map_entry_t *entry, lookup = { |
1999 | .ip = virtual_ip, | |
2000 | }; | |
7daf5226 | 2001 | |
9474a0d9 MW |
2002 | if (!this->install_virtual_ip) |
2003 | { /* disabled by config */ | |
2004 | return SUCCESS; | |
2005 | } | |
7daf5226 | 2006 | |
507f26f6 | 2007 | DBG2(DBG_KNL, "deleting virtual IP %H", virtual_ip); |
7daf5226 | 2008 | |
a25d536e | 2009 | this->lock->write_lock(this->lock); |
c6b40158 TB |
2010 | entry = this->vips->get_match(this->vips, &lookup, |
2011 | (void*)addr_map_entry_match); | |
2012 | if (!entry) | |
2013 | { /* we didn't install this IP as virtual IP */ | |
2014 | entry = this->addrs->get_match(this->addrs, &lookup, | |
2015 | (void*)addr_map_entry_match); | |
2016 | if (entry) | |
507f26f6 | 2017 | { |
c6b40158 TB |
2018 | DBG2(DBG_KNL, "not deleting existing IP %H on %s", virtual_ip, |
2019 | entry->iface->ifname); | |
a25d536e | 2020 | this->lock->unlock(this->lock); |
c6b40158 TB |
2021 | return SUCCESS; |
2022 | } | |
2023 | DBG2(DBG_KNL, "virtual IP %H not cached, unable to delete", virtual_ip); | |
a25d536e | 2024 | this->lock->unlock(this->lock); |
c6b40158 TB |
2025 | return FAILED; |
2026 | } | |
2027 | if (entry->addr->refcount == 1) | |
2028 | { | |
2029 | status_t status; | |
2030 | ||
2031 | /* we set this flag so that threads calling add_ip will block and wait | |
2032 | * until the entry is gone, also so we can wait below */ | |
2033 | entry->addr->installed = FALSE; | |
2034 | status = manage_ipaddr(this, RTM_DELADDR, 0, entry->iface->ifindex, | |
50bd7558 | 2035 | virtual_ip, prefix); |
d88597f0 | 2036 | if (status == SUCCESS && wait) |
c6b40158 TB |
2037 | { /* wait until the address is really gone */ |
2038 | while (is_known_vip(this, virtual_ip)) | |
507f26f6 | 2039 | { |
a25d536e | 2040 | this->condvar->wait(this->condvar, this->lock); |
507f26f6 TB |
2041 | } |
2042 | } | |
a25d536e | 2043 | this->lock->unlock(this->lock); |
c6b40158 | 2044 | return status; |
507f26f6 | 2045 | } |
c6b40158 TB |
2046 | else |
2047 | { | |
2048 | entry->addr->refcount--; | |
2049 | } | |
2050 | DBG2(DBG_KNL, "virtual IP %H used by other SAs, not deleting", | |
2051 | virtual_ip); | |
a25d536e | 2052 | this->lock->unlock(this->lock); |
c6b40158 | 2053 | return SUCCESS; |
507f26f6 TB |
2054 | } |
2055 | ||
2056 | /** | |
2057 | * Manages source routes in the routing table. | |
2058 | * By setting the appropriate nlmsg_type, the route gets added or removed. | |
2059 | */ | |
74ba22c9 TB |
2060 | static status_t manage_srcroute(private_kernel_netlink_net_t *this, |
2061 | int nlmsg_type, int flags, chunk_t dst_net, | |
2062 | u_int8_t prefixlen, host_t *gateway, | |
2063 | host_t *src_ip, char *if_name) | |
507f26f6 | 2064 | { |
21bf86f7 | 2065 | netlink_buf_t request; |
507f26f6 TB |
2066 | struct nlmsghdr *hdr; |
2067 | struct rtmsg *msg; | |
c1adf7e0 | 2068 | struct rtattr *rta; |
507f26f6 TB |
2069 | int ifindex; |
2070 | chunk_t chunk; | |
2071 | ||
2072 | /* if route is 0.0.0.0/0, we can't install it, as it would | |
2073 | * overwrite the default route. Instead, we add two routes: | |
2074 | * 0.0.0.0/1 and 128.0.0.0/1 */ | |
2075 | if (this->routing_table == 0 && prefixlen == 0) | |
2076 | { | |
2077 | chunk_t half_net; | |
2078 | u_int8_t half_prefixlen; | |
2079 | status_t status; | |
7daf5226 | 2080 | |
507f26f6 TB |
2081 | half_net = chunk_alloca(dst_net.len); |
2082 | memset(half_net.ptr, 0, half_net.len); | |
2083 | half_prefixlen = 1; | |
7daf5226 | 2084 | |
507f26f6 TB |
2085 | status = manage_srcroute(this, nlmsg_type, flags, half_net, half_prefixlen, |
2086 | gateway, src_ip, if_name); | |
2087 | half_net.ptr[0] |= 0x80; | |
2088 | status = manage_srcroute(this, nlmsg_type, flags, half_net, half_prefixlen, | |
2089 | gateway, src_ip, if_name); | |
2090 | return status; | |
2091 | } | |
7daf5226 | 2092 | |
507f26f6 TB |
2093 | memset(&request, 0, sizeof(request)); |
2094 | ||
2095 | hdr = (struct nlmsghdr*)request; | |
2096 | hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK | flags; | |
2097 | hdr->nlmsg_type = nlmsg_type; | |
2098 | hdr->nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)); | |
2099 | ||
2100 | msg = (struct rtmsg*)NLMSG_DATA(hdr); | |
2101 | msg->rtm_family = src_ip->get_family(src_ip); | |
2102 | msg->rtm_dst_len = prefixlen; | |
2103 | msg->rtm_table = this->routing_table; | |
2104 | msg->rtm_protocol = RTPROT_STATIC; | |
2105 | msg->rtm_type = RTN_UNICAST; | |
2106 | msg->rtm_scope = RT_SCOPE_UNIVERSE; | |
7daf5226 | 2107 | |
507f26f6 TB |
2108 | netlink_add_attribute(hdr, RTA_DST, dst_net, sizeof(request)); |
2109 | chunk = src_ip->get_address(src_ip); | |
2110 | netlink_add_attribute(hdr, RTA_PREFSRC, chunk, sizeof(request)); | |
5be75c2c MW |
2111 | if (gateway && gateway->get_family(gateway) == src_ip->get_family(src_ip)) |
2112 | { | |
2113 | chunk = gateway->get_address(gateway); | |
2114 | netlink_add_attribute(hdr, RTA_GATEWAY, chunk, sizeof(request)); | |
2115 | } | |
507f26f6 TB |
2116 | ifindex = get_interface_index(this, if_name); |
2117 | chunk.ptr = (char*)&ifindex; | |
2118 | chunk.len = sizeof(ifindex); | |
2119 | netlink_add_attribute(hdr, RTA_OIF, chunk, sizeof(request)); | |
2120 | ||
47a0e289 | 2121 | if (this->mtu || this->mss) |
c1adf7e0 | 2122 | { |
47a0e289 TB |
2123 | chunk = chunk_alloca(RTA_LENGTH((sizeof(struct rtattr) + |
2124 | sizeof(u_int32_t)) * 2)); | |
2125 | chunk.len = 0; | |
c1adf7e0 | 2126 | rta = (struct rtattr*)chunk.ptr; |
47a0e289 TB |
2127 | if (this->mtu) |
2128 | { | |
2129 | rta->rta_type = RTAX_MTU; | |
2130 | rta->rta_len = RTA_LENGTH(sizeof(u_int32_t)); | |
2131 | memcpy(RTA_DATA(rta), &this->mtu, sizeof(u_int32_t)); | |
2132 | chunk.len = rta->rta_len; | |
2133 | } | |
2134 | if (this->mss) | |
2135 | { | |
2136 | rta = (struct rtattr*)(chunk.ptr + RTA_ALIGN(chunk.len)); | |
2137 | rta->rta_type = RTAX_ADVMSS; | |
2138 | rta->rta_len = RTA_LENGTH(sizeof(u_int32_t)); | |
2139 | memcpy(RTA_DATA(rta), &this->mss, sizeof(u_int32_t)); | |
2140 | chunk.len = RTA_ALIGN(chunk.len) + rta->rta_len; | |
2141 | } | |
c1adf7e0 TB |
2142 | netlink_add_attribute(hdr, RTA_METRICS, chunk, sizeof(request)); |
2143 | } | |
2144 | ||
507f26f6 TB |
2145 | return this->socket->send_ack(this->socket, hdr); |
2146 | } | |
2147 | ||
887abfb1 MW |
2148 | METHOD(kernel_net_t, add_route, status_t, |
2149 | private_kernel_netlink_net_t *this, chunk_t dst_net, u_int8_t prefixlen, | |
2150 | host_t *gateway, host_t *src_ip, char *if_name) | |
507f26f6 | 2151 | { |
74ba22c9 TB |
2152 | status_t status; |
2153 | route_entry_t *found, route = { | |
2154 | .dst_net = dst_net, | |
2155 | .prefixlen = prefixlen, | |
2156 | .gateway = gateway, | |
2157 | .src_ip = src_ip, | |
2158 | .if_name = if_name, | |
2159 | }; | |
2160 | ||
16d62305 | 2161 | this->routes_lock->lock(this->routes_lock); |
74ba22c9 TB |
2162 | found = this->routes->get(this->routes, &route); |
2163 | if (found) | |
2164 | { | |
16d62305 | 2165 | this->routes_lock->unlock(this->routes_lock); |
74ba22c9 TB |
2166 | return ALREADY_DONE; |
2167 | } | |
74ba22c9 TB |
2168 | status = manage_srcroute(this, RTM_NEWROUTE, NLM_F_CREATE | NLM_F_EXCL, |
2169 | dst_net, prefixlen, gateway, src_ip, if_name); | |
f0f78b74 TB |
2170 | if (status == SUCCESS) |
2171 | { | |
2172 | found = route_entry_clone(&route); | |
2173 | this->routes->put(this->routes, found, found); | |
2174 | } | |
16d62305 | 2175 | this->routes_lock->unlock(this->routes_lock); |
74ba22c9 | 2176 | return status; |
507f26f6 | 2177 | } |
7daf5226 | 2178 | |
887abfb1 MW |
2179 | METHOD(kernel_net_t, del_route, status_t, |
2180 | private_kernel_netlink_net_t *this, chunk_t dst_net, u_int8_t prefixlen, | |
2181 | host_t *gateway, host_t *src_ip, char *if_name) | |
507f26f6 | 2182 | { |
74ba22c9 TB |
2183 | status_t status; |
2184 | route_entry_t *found, route = { | |
2185 | .dst_net = dst_net, | |
2186 | .prefixlen = prefixlen, | |
2187 | .gateway = gateway, | |
2188 | .src_ip = src_ip, | |
2189 | .if_name = if_name, | |
2190 | }; | |
2191 | ||
16d62305 | 2192 | this->routes_lock->lock(this->routes_lock); |
74ba22c9 TB |
2193 | found = this->routes->get(this->routes, &route); |
2194 | if (!found) | |
2195 | { | |
16d62305 | 2196 | this->routes_lock->unlock(this->routes_lock); |
74ba22c9 TB |
2197 | return NOT_FOUND; |
2198 | } | |
2199 | this->routes->remove(this->routes, found); | |
2200 | route_entry_destroy(found); | |
2201 | status = manage_srcroute(this, RTM_DELROUTE, 0, dst_net, prefixlen, | |
2202 | gateway, src_ip, if_name); | |
16d62305 | 2203 | this->routes_lock->unlock(this->routes_lock); |
74ba22c9 | 2204 | return status; |
507f26f6 TB |
2205 | } |
2206 | ||
2207 | /** | |
2208 | * Initialize a list of local addresses. | |
2209 | */ | |
2210 | static status_t init_address_list(private_kernel_netlink_net_t *this) | |
2211 | { | |
21bf86f7 | 2212 | netlink_buf_t request; |
507f26f6 TB |
2213 | struct nlmsghdr *out, *current, *in; |
2214 | struct rtgenmsg *msg; | |
2215 | size_t len; | |
e13389a7 | 2216 | enumerator_t *ifaces, *addrs; |
507f26f6 TB |
2217 | iface_entry_t *iface; |
2218 | addr_entry_t *addr; | |
7daf5226 | 2219 | |
31a0e24b | 2220 | DBG2(DBG_KNL, "known interfaces and IP addresses:"); |
7daf5226 | 2221 | |
507f26f6 TB |
2222 | memset(&request, 0, sizeof(request)); |
2223 | ||
2224 | in = (struct nlmsghdr*)&request; | |
2225 | in->nlmsg_len = NLMSG_LENGTH(sizeof(struct rtgenmsg)); | |
2226 | in->nlmsg_flags = NLM_F_REQUEST | NLM_F_MATCH | NLM_F_ROOT; | |
2227 | msg = (struct rtgenmsg*)NLMSG_DATA(in); | |
2228 | msg->rtgen_family = AF_UNSPEC; | |
7daf5226 | 2229 | |
507f26f6 TB |
2230 | /* get all links */ |
2231 | in->nlmsg_type = RTM_GETLINK; | |
2232 | if (this->socket->send(this->socket, in, &out, &len) != SUCCESS) | |
2233 | { | |
2234 | return FAILED; | |
2235 | } | |
2236 | current = out; | |
2237 | while (NLMSG_OK(current, len)) | |
2238 | { | |
2239 | switch (current->nlmsg_type) | |
2240 | { | |
2241 | case NLMSG_DONE: | |
2242 | break; | |
2243 | case RTM_NEWLINK: | |
2244 | process_link(this, current, FALSE); | |
2245 | /* fall through */ | |
2246 | default: | |
2247 | current = NLMSG_NEXT(current, len); | |
2248 | continue; | |
2249 | } | |
2250 | break; | |
2251 | } | |
2252 | free(out); | |
7daf5226 | 2253 | |
507f26f6 TB |
2254 | /* get all interface addresses */ |
2255 | in->nlmsg_type = RTM_GETADDR; | |
2256 | if (this->socket->send(this->socket, in, &out, &len) != SUCCESS) | |
2257 | { | |
2258 | return FAILED; | |
2259 | } | |
2260 | current = out; | |
2261 | while (NLMSG_OK(current, len)) | |
2262 | { | |
2263 | switch (current->nlmsg_type) | |
2264 | { | |
2265 | case NLMSG_DONE: | |
2266 | break; | |
2267 | case RTM_NEWADDR: | |
2268 | process_addr(this, current, FALSE); | |
2269 | /* fall through */ | |
2270 | default: | |
2271 | current = NLMSG_NEXT(current, len); | |
2272 | continue; | |
2273 | } | |
2274 | break; | |
2275 | } | |
2276 | free(out); | |
7daf5226 | 2277 | |
a25d536e | 2278 | this->lock->read_lock(this->lock); |
e13389a7 MW |
2279 | ifaces = this->ifaces->create_enumerator(this->ifaces); |
2280 | while (ifaces->enumerate(ifaces, &iface)) | |
507f26f6 | 2281 | { |
940e1b0f | 2282 | if (iface_entry_up_and_usable(iface)) |
507f26f6 | 2283 | { |
31a0e24b | 2284 | DBG2(DBG_KNL, " %s", iface->ifname); |
e13389a7 MW |
2285 | addrs = iface->addrs->create_enumerator(iface->addrs); |
2286 | while (addrs->enumerate(addrs, (void**)&addr)) | |
507f26f6 | 2287 | { |
31a0e24b | 2288 | DBG2(DBG_KNL, " %H", addr->ip); |
507f26f6 TB |
2289 | } |
2290 | addrs->destroy(addrs); | |
2291 | } | |
2292 | } | |
2293 | ifaces->destroy(ifaces); | |
a25d536e | 2294 | this->lock->unlock(this->lock); |
507f26f6 TB |
2295 | return SUCCESS; |
2296 | } | |
2297 | ||
2298 | /** | |
2299 | * create or delete a rule to use our routing table | |
2300 | */ | |
2301 | static status_t manage_rule(private_kernel_netlink_net_t *this, int nlmsg_type, | |
5be75c2c | 2302 | int family, u_int32_t table, u_int32_t prio) |
507f26f6 | 2303 | { |
21bf86f7 | 2304 | netlink_buf_t request; |
507f26f6 TB |
2305 | struct nlmsghdr *hdr; |
2306 | struct rtmsg *msg; | |
2307 | chunk_t chunk; | |
51fefe46 | 2308 | char *fwmark; |
507f26f6 | 2309 | |
7daf5226 | 2310 | memset(&request, 0, sizeof(request)); |
507f26f6 TB |
2311 | hdr = (struct nlmsghdr*)request; |
2312 | hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK; | |
7daf5226 | 2313 | hdr->nlmsg_type = nlmsg_type; |
507f26f6 TB |
2314 | if (nlmsg_type == RTM_NEWRULE) |
2315 | { | |
2316 | hdr->nlmsg_flags |= NLM_F_CREATE | NLM_F_EXCL; | |
2317 | } | |
2318 | hdr->nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)); | |
2319 | ||
2320 | msg = (struct rtmsg*)NLMSG_DATA(hdr); | |
2321 | msg->rtm_table = table; | |
5be75c2c | 2322 | msg->rtm_family = family; |
507f26f6 TB |
2323 | msg->rtm_protocol = RTPROT_BOOT; |
2324 | msg->rtm_scope = RT_SCOPE_UNIVERSE; | |
2325 | msg->rtm_type = RTN_UNICAST; | |
2326 | ||
2327 | chunk = chunk_from_thing(prio); | |
2328 | netlink_add_attribute(hdr, RTA_PRIORITY, chunk, sizeof(request)); | |
2329 | ||
51fefe46 | 2330 | fwmark = lib->settings->get_str(lib->settings, |
d347a130 | 2331 | "%s.plugins.kernel-netlink.fwmark", NULL, lib->ns); |
51fefe46 TB |
2332 | if (fwmark) |
2333 | { | |
8e8e97d1 TB |
2334 | #ifdef HAVE_LINUX_FIB_RULES_H |
2335 | mark_t mark; | |
2336 | ||
51fefe46 TB |
2337 | if (fwmark[0] == '!') |
2338 | { | |
2339 | msg->rtm_flags |= FIB_RULE_INVERT; | |
2340 | fwmark++; | |
2341 | } | |
2342 | if (mark_from_string(fwmark, &mark)) | |
2343 | { | |
2344 | chunk = chunk_from_thing(mark.value); | |
2345 | netlink_add_attribute(hdr, FRA_FWMARK, chunk, sizeof(request)); | |
2346 | chunk = chunk_from_thing(mark.mask); | |
2347 | netlink_add_attribute(hdr, FRA_FWMASK, chunk, sizeof(request)); | |
2348 | } | |
8e8e97d1 TB |
2349 | #else |
2350 | DBG1(DBG_KNL, "setting firewall mark on routing rule is not supported"); | |
2351 | #endif | |
51fefe46 | 2352 | } |
507f26f6 TB |
2353 | return this->socket->send_ack(this->socket, hdr); |
2354 | } | |
2355 | ||
7beb31aa TB |
2356 | /** |
2357 | * check for kernel features (currently only via version number) | |
2358 | */ | |
2359 | static void check_kernel_features(private_kernel_netlink_net_t *this) | |
2360 | { | |
2361 | struct utsname utsname; | |
2362 | int a, b, c; | |
2363 | ||
2364 | if (uname(&utsname) == 0) | |
2365 | { | |
2366 | switch(sscanf(utsname.release, "%d.%d.%d", &a, &b, &c)) | |
2367 | { | |
2368 | case 3: | |
2369 | if (a == 2) | |
2370 | { | |
2371 | DBG2(DBG_KNL, "detected Linux %d.%d.%d, no support for " | |
2372 | "RTA_PREFSRC for IPv6 routes", a, b, c); | |
2373 | break; | |
2374 | } | |
2375 | /* fall-through */ | |
2376 | case 2: | |
2377 | /* only 3.x+ uses two part version numbers */ | |
2378 | this->rta_prefsrc_for_ipv6 = TRUE; | |
2379 | break; | |
2380 | default: | |
2381 | break; | |
2382 | } | |
2383 | } | |
2384 | } | |
2385 | ||
c6b40158 TB |
2386 | /** |
2387 | * Destroy an address to iface map | |
2388 | */ | |
2389 | static void addr_map_destroy(hashtable_t *map) | |
2390 | { | |
2391 | enumerator_t *enumerator; | |
2392 | addr_map_entry_t *addr; | |
2393 | ||
2394 | enumerator = map->create_enumerator(map); | |
2395 | while (enumerator->enumerate(enumerator, NULL, (void**)&addr)) | |
2396 | { | |
2397 | free(addr); | |
2398 | } | |
2399 | enumerator->destroy(enumerator); | |
2400 | map->destroy(map); | |
2401 | } | |
2402 | ||
887abfb1 MW |
2403 | METHOD(kernel_net_t, destroy, void, |
2404 | private_kernel_netlink_net_t *this) | |
507f26f6 | 2405 | { |
74ba22c9 TB |
2406 | enumerator_t *enumerator; |
2407 | route_entry_t *route; | |
2408 | ||
507f26f6 TB |
2409 | if (this->routing_table) |
2410 | { | |
5be75c2c MW |
2411 | manage_rule(this, RTM_DELRULE, AF_INET, this->routing_table, |
2412 | this->routing_table_prio); | |
2413 | manage_rule(this, RTM_DELRULE, AF_INET6, this->routing_table, | |
507f26f6 TB |
2414 | this->routing_table_prio); |
2415 | } | |
d6a27ec6 MW |
2416 | if (this->socket_events > 0) |
2417 | { | |
f4f77d74 | 2418 | lib->watcher->remove(lib->watcher, this->socket_events); |
d6a27ec6 MW |
2419 | close(this->socket_events); |
2420 | } | |
74ba22c9 TB |
2421 | enumerator = this->routes->create_enumerator(this->routes); |
2422 | while (enumerator->enumerate(enumerator, NULL, (void**)&route)) | |
2423 | { | |
2424 | manage_srcroute(this, RTM_DELROUTE, 0, route->dst_net, route->prefixlen, | |
2425 | route->gateway, route->src_ip, route->if_name); | |
2426 | route_entry_destroy(route); | |
2427 | } | |
2428 | enumerator->destroy(enumerator); | |
2429 | this->routes->destroy(this->routes); | |
16d62305 | 2430 | this->routes_lock->destroy(this->routes_lock); |
9e19cb91 | 2431 | DESTROY_IF(this->socket); |
74ba22c9 | 2432 | |
f834249c TB |
2433 | net_changes_clear(this); |
2434 | this->net_changes->destroy(this->net_changes); | |
2435 | this->net_changes_lock->destroy(this->net_changes_lock); | |
2436 | ||
c6b40158 TB |
2437 | addr_map_destroy(this->addrs); |
2438 | addr_map_destroy(this->vips); | |
1f97e1aa | 2439 | |
507f26f6 | 2440 | this->ifaces->destroy_function(this->ifaces, (void*)iface_entry_destroy); |
d266e895 | 2441 | this->rt_exclude->destroy(this->rt_exclude); |
4134108c | 2442 | this->roam_lock->destroy(this->roam_lock); |
3ac5a0db | 2443 | this->condvar->destroy(this->condvar); |
a25d536e | 2444 | this->lock->destroy(this->lock); |
507f26f6 TB |
2445 | free(this); |
2446 | } | |
2447 | ||
2448 | /* | |
2449 | * Described in header. | |
2450 | */ | |
2451 | kernel_netlink_net_t *kernel_netlink_net_create() | |
2452 | { | |
887abfb1 | 2453 | private_kernel_netlink_net_t *this; |
d266e895 | 2454 | enumerator_t *enumerator; |
05ca5655 | 2455 | bool register_for_events = TRUE; |
d266e895 | 2456 | char *exclude; |
7daf5226 | 2457 | |
887abfb1 MW |
2458 | INIT(this, |
2459 | .public = { | |
2460 | .interface = { | |
2461 | .get_interface = _get_interface_name, | |
2462 | .create_address_enumerator = _create_address_enumerator, | |
2463 | .get_source_addr = _get_source_addr, | |
2464 | .get_nexthop = _get_nexthop, | |
2465 | .add_ip = _add_ip, | |
2466 | .del_ip = _del_ip, | |
2467 | .add_route = _add_route, | |
2468 | .del_route = _del_route, | |
2469 | .destroy = _destroy, | |
2470 | }, | |
2471 | }, | |
2472 | .socket = netlink_socket_create(NETLINK_ROUTE), | |
2473 | .rt_exclude = linked_list_create(), | |
74ba22c9 TB |
2474 | .routes = hashtable_create((hashtable_hash_t)route_entry_hash, |
2475 | (hashtable_equals_t)route_entry_equals, 16), | |
f834249c TB |
2476 | .net_changes = hashtable_create( |
2477 | (hashtable_hash_t)net_change_hash, | |
2478 | (hashtable_equals_t)net_change_equals, 16), | |
1f97e1aa TB |
2479 | .addrs = hashtable_create( |
2480 | (hashtable_hash_t)addr_map_entry_hash, | |
2481 | (hashtable_equals_t)addr_map_entry_equals, 16), | |
c6b40158 TB |
2482 | .vips = hashtable_create((hashtable_hash_t)addr_map_entry_hash, |
2483 | (hashtable_equals_t)addr_map_entry_equals, 16), | |
16d62305 | 2484 | .routes_lock = mutex_create(MUTEX_TYPE_DEFAULT), |
f834249c | 2485 | .net_changes_lock = mutex_create(MUTEX_TYPE_DEFAULT), |
887abfb1 | 2486 | .ifaces = linked_list_create(), |
a25d536e TB |
2487 | .lock = rwlock_create(RWLOCK_TYPE_DEFAULT), |
2488 | .condvar = rwlock_condvar_create(), | |
4134108c | 2489 | .roam_lock = spinlock_create(), |
887abfb1 | 2490 | .routing_table = lib->settings->get_int(lib->settings, |
d347a130 | 2491 | "%s.routing_table", ROUTING_TABLE, lib->ns), |
887abfb1 | 2492 | .routing_table_prio = lib->settings->get_int(lib->settings, |
d347a130 | 2493 | "%s.routing_table_prio", ROUTING_TABLE_PRIO, lib->ns), |
887abfb1 | 2494 | .process_route = lib->settings->get_bool(lib->settings, |
d347a130 | 2495 | "%s.process_route", TRUE, lib->ns), |
887abfb1 | 2496 | .install_virtual_ip = lib->settings->get_bool(lib->settings, |
d347a130 | 2497 | "%s.install_virtual_ip", TRUE, lib->ns), |
e8e9048f | 2498 | .install_virtual_ip_on = lib->settings->get_str(lib->settings, |
d347a130 | 2499 | "%s.install_virtual_ip_on", NULL, lib->ns), |
3bf98189 TB |
2500 | .prefer_temporary_addrs = lib->settings->get_bool(lib->settings, |
2501 | "%s.prefer_temporary_addrs", FALSE, lib->ns), | |
37873f99 | 2502 | .roam_events = lib->settings->get_bool(lib->settings, |
d347a130 | 2503 | "%s.plugins.kernel-netlink.roam_events", TRUE, lib->ns), |
c1adf7e0 TB |
2504 | .mtu = lib->settings->get_int(lib->settings, |
2505 | "%s.plugins.kernel-netlink.mtu", 0, lib->ns), | |
47a0e289 TB |
2506 | .mss = lib->settings->get_int(lib->settings, |
2507 | "%s.plugins.kernel-netlink.mss", 0, lib->ns), | |
887abfb1 | 2508 | ); |
f834249c | 2509 | timerclear(&this->last_route_reinstall); |
4134108c | 2510 | timerclear(&this->next_roam); |
887abfb1 | 2511 | |
7beb31aa TB |
2512 | check_kernel_features(this); |
2513 | ||
d347a130 | 2514 | if (streq(lib->ns, "starter")) |
05ca5655 TB |
2515 | { /* starter has no threads, so we do not register for kernel events */ |
2516 | register_for_events = FALSE; | |
2517 | } | |
2518 | ||
d266e895 | 2519 | exclude = lib->settings->get_str(lib->settings, |
d347a130 | 2520 | "%s.ignore_routing_tables", NULL, lib->ns); |
d266e895 TE |
2521 | if (exclude) |
2522 | { | |
2523 | char *token; | |
2524 | uintptr_t table; | |
2525 | ||
2526 | enumerator = enumerator_create_token(exclude, " ", " "); | |
2527 | while (enumerator->enumerate(enumerator, &token)) | |
2528 | { | |
2529 | errno = 0; | |
2530 | table = strtoul(token, NULL, 10); | |
2531 | ||
2532 | if (errno == 0) | |
2533 | { | |
2534 | this->rt_exclude->insert_last(this->rt_exclude, (void*)table); | |
2535 | } | |
2536 | } | |
2537 | enumerator->destroy(enumerator); | |
2538 | } | |
2539 | ||
05ca5655 | 2540 | if (register_for_events) |
507f26f6 | 2541 | { |
05ca5655 TB |
2542 | struct sockaddr_nl addr; |
2543 | ||
2544 | memset(&addr, 0, sizeof(addr)); | |
2545 | addr.nl_family = AF_NETLINK; | |
7daf5226 | 2546 | |
05ca5655 TB |
2547 | /* create and bind RT socket for events (address/interface/route changes) */ |
2548 | this->socket_events = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE); | |
2549 | if (this->socket_events < 0) | |
2550 | { | |
2551 | DBG1(DBG_KNL, "unable to create RT event socket"); | |
2552 | destroy(this); | |
2553 | return NULL; | |
2554 | } | |
2555 | addr.nl_groups = RTMGRP_IPV4_IFADDR | RTMGRP_IPV6_IFADDR | | |
2556 | RTMGRP_IPV4_ROUTE | RTMGRP_IPV6_ROUTE | RTMGRP_LINK; | |
2557 | if (bind(this->socket_events, (struct sockaddr*)&addr, sizeof(addr))) | |
2558 | { | |
2559 | DBG1(DBG_KNL, "unable to bind RT event socket"); | |
2560 | destroy(this); | |
2561 | return NULL; | |
2562 | } | |
2563 | ||
f4f77d74 MW |
2564 | lib->watcher->add(lib->watcher, this->socket_events, WATCHER_READ, |
2565 | (watcher_cb_t)receive_events, this); | |
05ca5655 | 2566 | } |
7daf5226 | 2567 | |
507f26f6 TB |
2568 | if (init_address_list(this) != SUCCESS) |
2569 | { | |
d6a27ec6 MW |
2570 | DBG1(DBG_KNL, "unable to get interface list"); |
2571 | destroy(this); | |
2572 | return NULL; | |
507f26f6 | 2573 | } |
7daf5226 | 2574 | |
507f26f6 TB |
2575 | if (this->routing_table) |
2576 | { | |
5be75c2c MW |
2577 | if (manage_rule(this, RTM_NEWRULE, AF_INET, this->routing_table, |
2578 | this->routing_table_prio) != SUCCESS) | |
2579 | { | |
2580 | DBG1(DBG_KNL, "unable to create IPv4 routing table rule"); | |
2581 | } | |
2582 | if (manage_rule(this, RTM_NEWRULE, AF_INET6, this->routing_table, | |
507f26f6 TB |
2583 | this->routing_table_prio) != SUCCESS) |
2584 | { | |
5be75c2c | 2585 | DBG1(DBG_KNL, "unable to create IPv6 routing table rule"); |
507f26f6 TB |
2586 | } |
2587 | } | |
7daf5226 | 2588 | |
507f26f6 TB |
2589 | return &this->public; |
2590 | } |