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507f26f6 | 1 | /* |
4664992f | 2 | * Copyright (C) 2008-2018 Tobias Brunner |
ce5b1708 | 3 | * Copyright (C) 2005-2008 Martin Willi |
66e9165b | 4 | * HSR Hochschule fuer Technik Rapperswil |
507f26f6 TB |
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 | ||
8394ea2a | 54 | #include <daemon.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 | ||
4664992f TB |
81 | /** multicast groups (for groups > 31 setsockopt has to be used) */ |
82 | #define nl_group(group) (1 << (group - 1)) | |
83 | ||
12c0bde6 MW |
84 | ENUM(rt_msg_names, RTM_NEWLINK, RTM_GETRULE, |
85 | "RTM_NEWLINK", | |
86 | "RTM_DELLINK", | |
87 | "RTM_GETLINK", | |
88 | "RTM_SETLINK", | |
89 | "RTM_NEWADDR", | |
90 | "RTM_DELADDR", | |
91 | "RTM_GETADDR", | |
92 | "31", | |
93 | "RTM_NEWROUTE", | |
94 | "RTM_DELROUTE", | |
95 | "RTM_GETROUTE", | |
96 | "35", | |
97 | "RTM_NEWNEIGH", | |
98 | "RTM_DELNEIGH", | |
99 | "RTM_GETNEIGH", | |
100 | "RTM_NEWRULE", | |
101 | "RTM_DELRULE", | |
102 | "RTM_GETRULE", | |
103 | ); | |
104 | ||
507f26f6 TB |
105 | typedef struct addr_entry_t addr_entry_t; |
106 | ||
107 | /** | |
c6b40158 | 108 | * IP address in an iface_entry_t |
507f26f6 TB |
109 | */ |
110 | struct addr_entry_t { | |
7daf5226 | 111 | |
c6b40158 | 112 | /** the ip address */ |
507f26f6 | 113 | host_t *ip; |
7daf5226 | 114 | |
3bf98189 TB |
115 | /** address flags */ |
116 | u_char flags; | |
117 | ||
507f26f6 TB |
118 | /** scope of the address */ |
119 | u_char scope; | |
7daf5226 | 120 | |
e8e9048f | 121 | /** number of times this IP is used, if virtual (i.e. managed by us) */ |
507f26f6 | 122 | u_int refcount; |
c6b40158 TB |
123 | |
124 | /** TRUE once it is installed, if virtual */ | |
125 | bool installed; | |
507f26f6 TB |
126 | }; |
127 | ||
128 | /** | |
129 | * destroy a addr_entry_t object | |
130 | */ | |
131 | static void addr_entry_destroy(addr_entry_t *this) | |
132 | { | |
133 | this->ip->destroy(this->ip); | |
134 | free(this); | |
135 | } | |
136 | ||
137 | typedef struct iface_entry_t iface_entry_t; | |
138 | ||
139 | /** | |
140 | * A network interface on this system, containing addr_entry_t's | |
141 | */ | |
142 | struct iface_entry_t { | |
7daf5226 | 143 | |
507f26f6 TB |
144 | /** interface index */ |
145 | int ifindex; | |
7daf5226 | 146 | |
507f26f6 TB |
147 | /** name of the interface */ |
148 | char ifname[IFNAMSIZ]; | |
7daf5226 | 149 | |
507f26f6 TB |
150 | /** interface flags, as in netdevice(7) SIOCGIFFLAGS */ |
151 | u_int flags; | |
7daf5226 | 152 | |
507f26f6 TB |
153 | /** list of addresses as host_t */ |
154 | linked_list_t *addrs; | |
940e1b0f TB |
155 | |
156 | /** TRUE if usable by config */ | |
157 | bool usable; | |
507f26f6 TB |
158 | }; |
159 | ||
160 | /** | |
161 | * destroy an interface entry | |
162 | */ | |
163 | static void iface_entry_destroy(iface_entry_t *this) | |
164 | { | |
165 | this->addrs->destroy_function(this->addrs, (void*)addr_entry_destroy); | |
166 | free(this); | |
167 | } | |
168 | ||
2e4d110d TB |
169 | CALLBACK(iface_entry_by_index, bool, |
170 | iface_entry_t *this, va_list args) | |
940e1b0f | 171 | { |
2e4d110d TB |
172 | int ifindex; |
173 | ||
174 | VA_ARGS_VGET(args, ifindex); | |
175 | return this->ifindex == ifindex; | |
940e1b0f TB |
176 | } |
177 | ||
2e4d110d TB |
178 | CALLBACK(iface_entry_by_name, bool, |
179 | iface_entry_t *this, va_list args) | |
c6b40158 | 180 | { |
2e4d110d TB |
181 | char *ifname; |
182 | ||
183 | VA_ARGS_VGET(args, ifname); | |
c6b40158 TB |
184 | return streq(this->ifname, ifname); |
185 | } | |
186 | ||
1f97e1aa TB |
187 | /** |
188 | * check if an interface is up | |
189 | */ | |
190 | static inline bool iface_entry_up(iface_entry_t *iface) | |
191 | { | |
192 | return (iface->flags & IFF_UP) == IFF_UP; | |
193 | } | |
194 | ||
940e1b0f TB |
195 | /** |
196 | * check if an interface is up and usable | |
197 | */ | |
198 | static inline bool iface_entry_up_and_usable(iface_entry_t *iface) | |
199 | { | |
1f97e1aa TB |
200 | return iface->usable && iface_entry_up(iface); |
201 | } | |
202 | ||
203 | typedef struct addr_map_entry_t addr_map_entry_t; | |
204 | ||
205 | /** | |
206 | * Entry that maps an IP address to an interface entry | |
207 | */ | |
208 | struct addr_map_entry_t { | |
209 | /** The IP address */ | |
210 | host_t *ip; | |
211 | ||
c6b40158 TB |
212 | /** The address entry for this IP address */ |
213 | addr_entry_t *addr; | |
214 | ||
1f97e1aa TB |
215 | /** The interface this address is installed on */ |
216 | iface_entry_t *iface; | |
217 | }; | |
218 | ||
219 | /** | |
220 | * Hash a addr_map_entry_t object, all entries with the same IP address | |
221 | * are stored in the same bucket | |
222 | */ | |
223 | static u_int addr_map_entry_hash(addr_map_entry_t *this) | |
224 | { | |
225 | return chunk_hash(this->ip->get_address(this->ip)); | |
226 | } | |
227 | ||
228 | /** | |
229 | * Compare two addr_map_entry_t objects, two entries are equal if they are | |
230 | * installed on the same interface | |
231 | */ | |
232 | static bool addr_map_entry_equals(addr_map_entry_t *a, addr_map_entry_t *b) | |
233 | { | |
234 | return a->iface->ifindex == b->iface->ifindex && | |
235 | a->ip->ip_equals(a->ip, b->ip); | |
236 | } | |
237 | ||
238 | /** | |
239 | * Used with get_match this finds an address entry if it is installed on | |
240 | * an up and usable interface | |
241 | */ | |
242 | static bool addr_map_entry_match_up_and_usable(addr_map_entry_t *a, | |
243 | addr_map_entry_t *b) | |
244 | { | |
245 | return iface_entry_up_and_usable(b->iface) && | |
246 | a->ip->ip_equals(a->ip, b->ip); | |
247 | } | |
248 | ||
249 | /** | |
250 | * Used with get_match this finds an address entry if it is installed on | |
251 | * any active local interface | |
252 | */ | |
253 | static bool addr_map_entry_match_up(addr_map_entry_t *a, addr_map_entry_t *b) | |
254 | { | |
255 | return iface_entry_up(b->iface) && a->ip->ip_equals(a->ip, b->ip); | |
940e1b0f TB |
256 | } |
257 | ||
c6b40158 TB |
258 | /** |
259 | * Used with get_match this finds an address entry if it is installed on | |
260 | * any local interface | |
261 | */ | |
262 | static bool addr_map_entry_match(addr_map_entry_t *a, addr_map_entry_t *b) | |
263 | { | |
264 | return a->ip->ip_equals(a->ip, b->ip); | |
265 | } | |
266 | ||
74ba22c9 TB |
267 | typedef struct route_entry_t route_entry_t; |
268 | ||
269 | /** | |
270 | * Installed routing entry | |
271 | */ | |
272 | struct route_entry_t { | |
273 | /** Name of the interface the route is bound to */ | |
274 | char *if_name; | |
275 | ||
276 | /** Source ip of the route */ | |
277 | host_t *src_ip; | |
278 | ||
279 | /** Gateway for this route */ | |
280 | host_t *gateway; | |
281 | ||
282 | /** Destination net */ | |
283 | chunk_t dst_net; | |
284 | ||
285 | /** Destination net prefixlen */ | |
b12c53ce | 286 | uint8_t prefixlen; |
74ba22c9 TB |
287 | }; |
288 | ||
289 | /** | |
290 | * Clone a route_entry_t object. | |
291 | */ | |
292 | static route_entry_t *route_entry_clone(route_entry_t *this) | |
293 | { | |
294 | route_entry_t *route; | |
295 | ||
296 | INIT(route, | |
297 | .if_name = strdup(this->if_name), | |
298 | .src_ip = this->src_ip->clone(this->src_ip), | |
3cd7ba49 | 299 | .gateway = this->gateway ? this->gateway->clone(this->gateway) : NULL, |
74ba22c9 TB |
300 | .dst_net = chunk_clone(this->dst_net), |
301 | .prefixlen = this->prefixlen, | |
302 | ); | |
303 | return route; | |
304 | } | |
305 | ||
306 | /** | |
307 | * Destroy a route_entry_t object | |
308 | */ | |
309 | static void route_entry_destroy(route_entry_t *this) | |
310 | { | |
311 | free(this->if_name); | |
312 | DESTROY_IF(this->src_ip); | |
313 | DESTROY_IF(this->gateway); | |
314 | chunk_free(&this->dst_net); | |
315 | free(this); | |
316 | } | |
317 | ||
318 | /** | |
319 | * Hash a route_entry_t object | |
320 | */ | |
321 | static u_int route_entry_hash(route_entry_t *this) | |
322 | { | |
323 | return chunk_hash_inc(chunk_from_thing(this->prefixlen), | |
324 | chunk_hash(this->dst_net)); | |
325 | } | |
326 | ||
327 | /** | |
328 | * Compare two route_entry_t objects | |
329 | */ | |
330 | static bool route_entry_equals(route_entry_t *a, route_entry_t *b) | |
331 | { | |
3cd7ba49 TB |
332 | if (a->if_name && b->if_name && streq(a->if_name, b->if_name) && |
333 | a->src_ip->ip_equals(a->src_ip, b->src_ip) && | |
334 | chunk_equals(a->dst_net, b->dst_net) && a->prefixlen == b->prefixlen) | |
335 | { | |
336 | return (!a->gateway && !b->gateway) || (a->gateway && b->gateway && | |
337 | a->gateway->ip_equals(a->gateway, b->gateway)); | |
338 | } | |
339 | return FALSE; | |
74ba22c9 TB |
340 | } |
341 | ||
f834249c TB |
342 | typedef struct net_change_t net_change_t; |
343 | ||
344 | /** | |
345 | * Queued network changes | |
346 | */ | |
347 | struct net_change_t { | |
348 | /** Name of the interface that got activated (or an IP appeared on) */ | |
349 | char *if_name; | |
f834249c TB |
350 | }; |
351 | ||
352 | /** | |
353 | * Destroy a net_change_t object | |
354 | */ | |
355 | static void net_change_destroy(net_change_t *this) | |
356 | { | |
f834249c TB |
357 | free(this->if_name); |
358 | free(this); | |
359 | } | |
360 | ||
361 | /** | |
362 | * Hash a net_change_t object | |
363 | */ | |
364 | static u_int net_change_hash(net_change_t *this) | |
365 | { | |
f834249c TB |
366 | return chunk_hash(chunk_create(this->if_name, strlen(this->if_name))); |
367 | } | |
368 | ||
369 | /** | |
370 | * Compare two net_change_t objects | |
371 | */ | |
372 | static bool net_change_equals(net_change_t *a, net_change_t *b) | |
373 | { | |
c732e220 | 374 | return streq(a->if_name, b->if_name); |
f834249c TB |
375 | } |
376 | ||
507f26f6 TB |
377 | typedef struct private_kernel_netlink_net_t private_kernel_netlink_net_t; |
378 | ||
379 | /** | |
380 | * Private variables and functions of kernel_netlink_net class. | |
381 | */ | |
382 | struct private_kernel_netlink_net_t { | |
383 | /** | |
384 | * Public part of the kernel_netlink_net_t object. | |
385 | */ | |
386 | kernel_netlink_net_t public; | |
7daf5226 | 387 | |
507f26f6 | 388 | /** |
a25d536e | 389 | * lock to access various lists and maps |
507f26f6 | 390 | */ |
a25d536e | 391 | rwlock_t *lock; |
7daf5226 | 392 | |
507f26f6 TB |
393 | /** |
394 | * condition variable to signal virtual IP add/removal | |
395 | */ | |
a25d536e | 396 | rwlock_condvar_t *condvar; |
7daf5226 | 397 | |
507f26f6 TB |
398 | /** |
399 | * Cached list of interfaces and its addresses (iface_entry_t) | |
400 | */ | |
401 | linked_list_t *ifaces; | |
7daf5226 | 402 | |
1f97e1aa TB |
403 | /** |
404 | * Map for IP addresses to iface_entry_t objects (addr_map_entry_t) | |
405 | */ | |
406 | hashtable_t *addrs; | |
407 | ||
c6b40158 TB |
408 | /** |
409 | * Map for virtual IP addresses to iface_entry_t objects (addr_map_entry_t) | |
410 | */ | |
411 | hashtable_t *vips; | |
412 | ||
507f26f6 TB |
413 | /** |
414 | * netlink rt socket (routing) | |
415 | */ | |
416 | netlink_socket_t *socket; | |
7daf5226 | 417 | |
507f26f6 TB |
418 | /** |
419 | * Netlink rt socket to receive address change events | |
420 | */ | |
421 | int socket_events; | |
7daf5226 | 422 | |
507f26f6 | 423 | /** |
4134108c | 424 | * earliest time of the next roam event |
507f26f6 | 425 | */ |
4134108c TB |
426 | timeval_t next_roam; |
427 | ||
77d4a028 TB |
428 | /** |
429 | * roam event due to address change | |
430 | */ | |
431 | bool roam_address; | |
432 | ||
4134108c TB |
433 | /** |
434 | * lock to check and update roam event time | |
435 | */ | |
436 | spinlock_t *roam_lock; | |
7daf5226 | 437 | |
507f26f6 TB |
438 | /** |
439 | * routing table to install routes | |
440 | */ | |
441 | int routing_table; | |
7daf5226 | 442 | |
507f26f6 TB |
443 | /** |
444 | * priority of used routing table | |
445 | */ | |
446 | int routing_table_prio; | |
7daf5226 | 447 | |
74ba22c9 TB |
448 | /** |
449 | * installed routes | |
450 | */ | |
451 | hashtable_t *routes; | |
452 | ||
16d62305 TB |
453 | /** |
454 | * mutex for routes | |
455 | */ | |
456 | mutex_t *routes_lock; | |
457 | ||
f834249c | 458 | /** |
c732e220 | 459 | * interface changes which may trigger route reinstallation |
f834249c TB |
460 | */ |
461 | hashtable_t *net_changes; | |
462 | ||
463 | /** | |
464 | * mutex for route reinstallation triggers | |
465 | */ | |
466 | mutex_t *net_changes_lock; | |
467 | ||
468 | /** | |
469 | * time of last route reinstallation | |
470 | */ | |
471 | timeval_t last_route_reinstall; | |
472 | ||
507f26f6 TB |
473 | /** |
474 | * whether to react to RTM_NEWROUTE or RTM_DELROUTE events | |
475 | */ | |
476 | bool process_route; | |
7daf5226 | 477 | |
4664992f TB |
478 | /** |
479 | * whether to react to RTM_NEWRULE or RTM_DELRULE events | |
480 | */ | |
481 | bool process_rules; | |
482 | ||
37873f99 TB |
483 | /** |
484 | * whether to trigger roam events | |
485 | */ | |
486 | bool roam_events; | |
487 | ||
558691b3 MW |
488 | /** |
489 | * whether to install IPsec policy routes | |
490 | */ | |
491 | bool install_routes; | |
492 | ||
9474a0d9 MW |
493 | /** |
494 | * whether to actually install virtual IPs | |
495 | */ | |
496 | bool install_virtual_ip; | |
d266e895 | 497 | |
e8e9048f TB |
498 | /** |
499 | * the name of the interface virtual IP addresses are installed on | |
500 | */ | |
501 | char *install_virtual_ip_on; | |
502 | ||
7beb31aa TB |
503 | /** |
504 | * whether preferred source addresses can be specified for IPv6 routes | |
505 | */ | |
506 | bool rta_prefsrc_for_ipv6; | |
507 | ||
6bd1216e TB |
508 | /** |
509 | * whether marks can be used in route lookups | |
510 | */ | |
511 | bool rta_mark; | |
512 | ||
513 | /** | |
514 | * the mark excluded from the routing rule used for virtual IPs | |
515 | */ | |
516 | mark_t routing_mark; | |
517 | ||
3bf98189 TB |
518 | /** |
519 | * whether to prefer temporary IPv6 addresses over public ones | |
520 | */ | |
521 | bool prefer_temporary_addrs; | |
522 | ||
d266e895 TE |
523 | /** |
524 | * list with routing tables to be excluded from route lookup | |
525 | */ | |
526 | linked_list_t *rt_exclude; | |
c1adf7e0 TB |
527 | |
528 | /** | |
529 | * MTU to set on installed routes | |
530 | */ | |
b12c53ce | 531 | uint32_t mtu; |
47a0e289 TB |
532 | |
533 | /** | |
534 | * MSS to set on installed routes | |
535 | */ | |
b12c53ce | 536 | uint32_t mss; |
507f26f6 TB |
537 | }; |
538 | ||
f834249c TB |
539 | /** |
540 | * Forward declaration | |
541 | */ | |
542 | static status_t manage_srcroute(private_kernel_netlink_net_t *this, | |
543 | int nlmsg_type, int flags, chunk_t dst_net, | |
b12c53ce | 544 | uint8_t prefixlen, host_t *gateway, |
f834249c TB |
545 | host_t *src_ip, char *if_name); |
546 | ||
547 | /** | |
548 | * Clear the queued network changes. | |
549 | */ | |
550 | static void net_changes_clear(private_kernel_netlink_net_t *this) | |
551 | { | |
552 | enumerator_t *enumerator; | |
553 | net_change_t *change; | |
554 | ||
555 | enumerator = this->net_changes->create_enumerator(this->net_changes); | |
556 | while (enumerator->enumerate(enumerator, NULL, (void**)&change)) | |
557 | { | |
558 | this->net_changes->remove_at(this->net_changes, enumerator); | |
559 | net_change_destroy(change); | |
560 | } | |
561 | enumerator->destroy(enumerator); | |
562 | } | |
563 | ||
564 | /** | |
565 | * Act upon queued network changes. | |
566 | */ | |
567 | static job_requeue_t reinstall_routes(private_kernel_netlink_net_t *this) | |
568 | { | |
569 | enumerator_t *enumerator; | |
570 | route_entry_t *route; | |
571 | ||
572 | this->net_changes_lock->lock(this->net_changes_lock); | |
16d62305 | 573 | this->routes_lock->lock(this->routes_lock); |
f834249c TB |
574 | |
575 | enumerator = this->routes->create_enumerator(this->routes); | |
576 | while (enumerator->enumerate(enumerator, NULL, (void**)&route)) | |
577 | { | |
578 | net_change_t *change, lookup = { | |
579 | .if_name = route->if_name, | |
580 | }; | |
c732e220 | 581 | /* check if a change for the outgoing interface is queued */ |
f834249c TB |
582 | change = this->net_changes->get(this->net_changes, &lookup); |
583 | if (!change) | |
c732e220 | 584 | { /* in case src_ip is not on the outgoing interface */ |
9ba36c0f TB |
585 | if (this->public.interface.get_interface(&this->public.interface, |
586 | route->src_ip, &lookup.if_name)) | |
c732e220 | 587 | { |
9ba36c0f TB |
588 | if (!streq(lookup.if_name, route->if_name)) |
589 | { | |
590 | change = this->net_changes->get(this->net_changes, &lookup); | |
591 | } | |
592 | free(lookup.if_name); | |
c732e220 | 593 | } |
f834249c TB |
594 | } |
595 | if (change) | |
596 | { | |
597 | manage_srcroute(this, RTM_NEWROUTE, NLM_F_CREATE | NLM_F_EXCL, | |
598 | route->dst_net, route->prefixlen, route->gateway, | |
599 | route->src_ip, route->if_name); | |
600 | } | |
601 | } | |
602 | enumerator->destroy(enumerator); | |
16d62305 | 603 | this->routes_lock->unlock(this->routes_lock); |
f834249c TB |
604 | |
605 | net_changes_clear(this); | |
606 | this->net_changes_lock->unlock(this->net_changes_lock); | |
607 | return JOB_REQUEUE_NONE; | |
608 | } | |
609 | ||
610 | /** | |
611 | * Queue route reinstallation caused by network changes for a given interface. | |
f834249c TB |
612 | * |
613 | * The route reinstallation is delayed for a while and only done once for | |
614 | * several calls during this delay, in order to avoid doing it too often. | |
c732e220 | 615 | * The interface name is freed. |
f834249c TB |
616 | */ |
617 | static void queue_route_reinstall(private_kernel_netlink_net_t *this, | |
c732e220 | 618 | char *if_name) |
f834249c TB |
619 | { |
620 | net_change_t *update, *found; | |
621 | timeval_t now; | |
622 | job_t *job; | |
623 | ||
624 | INIT(update, | |
c732e220 | 625 | .if_name = if_name |
f834249c TB |
626 | ); |
627 | ||
628 | this->net_changes_lock->lock(this->net_changes_lock); | |
c732e220 | 629 | found = this->net_changes->put(this->net_changes, update, update); |
f834249c TB |
630 | if (found) |
631 | { | |
c732e220 | 632 | net_change_destroy(found); |
f834249c TB |
633 | } |
634 | time_monotonic(&now); | |
635 | if (timercmp(&now, &this->last_route_reinstall, >)) | |
636 | { | |
eecd41e3 | 637 | timeval_add_ms(&now, ROUTE_DELAY); |
f834249c TB |
638 | this->last_route_reinstall = now; |
639 | ||
640 | job = (job_t*)callback_job_create((callback_job_cb_t)reinstall_routes, | |
641 | this, NULL, NULL); | |
642 | lib->scheduler->schedule_job_ms(lib->scheduler, job, ROUTE_DELAY); | |
643 | } | |
644 | this->net_changes_lock->unlock(this->net_changes_lock); | |
645 | } | |
646 | ||
507f26f6 | 647 | /** |
c6b40158 TB |
648 | * check if the given IP is known as virtual IP and currently installed |
649 | * | |
650 | * this function will also return TRUE if the virtual IP entry disappeared. | |
651 | * in that case the returned entry will be NULL. | |
652 | * | |
a25d536e | 653 | * this->lock must be held when calling this function |
507f26f6 | 654 | */ |
c6b40158 TB |
655 | static bool is_vip_installed_or_gone(private_kernel_netlink_net_t *this, |
656 | host_t *ip, addr_map_entry_t **entry) | |
507f26f6 | 657 | { |
c6b40158 TB |
658 | addr_map_entry_t lookup = { |
659 | .ip = ip, | |
660 | }; | |
7daf5226 | 661 | |
c6b40158 TB |
662 | *entry = this->vips->get_match(this->vips, &lookup, |
663 | (void*)addr_map_entry_match); | |
664 | if (*entry == NULL) | |
665 | { /* the virtual IP disappeared */ | |
666 | return TRUE; | |
507f26f6 | 667 | } |
c6b40158 TB |
668 | return (*entry)->addr->installed; |
669 | } | |
7daf5226 | 670 | |
c6b40158 TB |
671 | /** |
672 | * check if the given IP is known as virtual IP | |
673 | * | |
a25d536e | 674 | * this->lock must be held when calling this function |
c6b40158 TB |
675 | */ |
676 | static bool is_known_vip(private_kernel_netlink_net_t *this, host_t *ip) | |
677 | { | |
678 | addr_map_entry_t lookup = { | |
679 | .ip = ip, | |
680 | }; | |
681 | ||
682 | return this->vips->get_match(this->vips, &lookup, | |
683 | (void*)addr_map_entry_match) != NULL; | |
507f26f6 TB |
684 | } |
685 | ||
1f97e1aa TB |
686 | /** |
687 | * Add an address map entry | |
688 | */ | |
c6b40158 TB |
689 | static void addr_map_entry_add(hashtable_t *map, addr_entry_t *addr, |
690 | iface_entry_t *iface) | |
1f97e1aa TB |
691 | { |
692 | addr_map_entry_t *entry; | |
693 | ||
1f97e1aa TB |
694 | INIT(entry, |
695 | .ip = addr->ip, | |
c6b40158 | 696 | .addr = addr, |
1f97e1aa TB |
697 | .iface = iface, |
698 | ); | |
c6b40158 | 699 | entry = map->put(map, entry, entry); |
1f97e1aa TB |
700 | free(entry); |
701 | } | |
702 | ||
703 | /** | |
c6b40158 | 704 | * Remove an address map entry |
1f97e1aa | 705 | */ |
c6b40158 TB |
706 | static void addr_map_entry_remove(hashtable_t *map, addr_entry_t *addr, |
707 | iface_entry_t *iface) | |
1f97e1aa TB |
708 | { |
709 | addr_map_entry_t *entry, lookup = { | |
710 | .ip = addr->ip, | |
c6b40158 | 711 | .addr = addr, |
1f97e1aa TB |
712 | .iface = iface, |
713 | }; | |
714 | ||
c6b40158 | 715 | entry = map->remove(map, &lookup); |
1f97e1aa TB |
716 | free(entry); |
717 | } | |
718 | ||
bfc595a3 TB |
719 | /** |
720 | * Check if an address or net (addr with prefix net bits) is in | |
721 | * subnet (net with net_len net bits) | |
722 | */ | |
723 | static bool addr_in_subnet(chunk_t addr, int prefix, chunk_t net, int net_len) | |
724 | { | |
725 | static const u_char mask[] = { 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe }; | |
726 | int byte = 0; | |
727 | ||
728 | if (net_len == 0) | |
729 | { /* any address matches a /0 network */ | |
730 | return TRUE; | |
731 | } | |
732 | if (addr.len != net.len || net_len > 8 * net.len || prefix < net_len) | |
733 | { | |
734 | return FALSE; | |
735 | } | |
736 | /* scan through all bytes in network order */ | |
737 | while (net_len > 0) | |
738 | { | |
739 | if (net_len < 8) | |
740 | { | |
741 | return (mask[net_len] & addr.ptr[byte]) == (mask[net_len] & net.ptr[byte]); | |
742 | } | |
743 | else | |
744 | { | |
745 | if (addr.ptr[byte] != net.ptr[byte]) | |
746 | { | |
747 | return FALSE; | |
748 | } | |
749 | byte++; | |
750 | net_len -= 8; | |
751 | } | |
752 | } | |
753 | return TRUE; | |
754 | } | |
755 | ||
756 | /** | |
757 | * Check if the given address is in subnet (net with net_len net bits) | |
758 | */ | |
759 | static bool host_in_subnet(host_t *host, chunk_t net, int net_len) | |
760 | { | |
761 | chunk_t addr; | |
762 | ||
763 | addr = host->get_address(host); | |
764 | return addr_in_subnet(addr, addr.len * 8, net, net_len); | |
765 | } | |
766 | ||
29607690 | 767 | /** |
3bf98189 TB |
768 | * Determine the type or scope of the given unicast IP address. This is not |
769 | * the same thing returned in rtm_scope/ifa_scope. | |
770 | * | |
771 | * We use return values as defined in RFC 6724 (referring to RFC 4291). | |
772 | */ | |
773 | static u_char get_scope(host_t *ip) | |
774 | { | |
775 | chunk_t addr; | |
776 | ||
777 | addr = ip->get_address(ip); | |
778 | switch (addr.len) | |
779 | { | |
780 | case 4: | |
781 | /* we use the mapping defined in RFC 6724, 3.2 */ | |
782 | if (addr.ptr[0] == 127) | |
783 | { /* link-local, same as the IPv6 loopback address */ | |
784 | return 2; | |
785 | } | |
786 | if (addr.ptr[0] == 169 && addr.ptr[1] == 254) | |
787 | { /* link-local */ | |
788 | return 2; | |
789 | } | |
790 | break; | |
791 | case 16: | |
cd6b2af3 | 792 | if (IN6_IS_ADDR_LOOPBACK((struct in6_addr*)addr.ptr)) |
3bf98189 TB |
793 | { /* link-local, according to RFC 4291, 2.5.3 */ |
794 | return 2; | |
795 | } | |
cd6b2af3 | 796 | if (IN6_IS_ADDR_LINKLOCAL((struct in6_addr*)addr.ptr)) |
3bf98189 TB |
797 | { |
798 | return 2; | |
799 | } | |
cd6b2af3 | 800 | if (IN6_IS_ADDR_SITELOCAL((struct in6_addr*)addr.ptr)) |
3bf98189 TB |
801 | { /* deprecated, according to RFC 4291, 2.5.7 */ |
802 | return 5; | |
803 | } | |
804 | break; | |
805 | default: | |
806 | break; | |
807 | } | |
808 | /* global */ | |
809 | return 14; | |
810 | } | |
811 | ||
7a40162c TB |
812 | /** |
813 | * Determine the label of the given unicast IP address. | |
814 | * | |
815 | * We currently only support the default table given in RFC 6724: | |
816 | * | |
817 | * Prefix Precedence Label | |
818 | * ::1/128 50 0 | |
819 | * ::/0 40 1 | |
820 | * ::ffff:0:0/96 35 4 | |
821 | * 2002::/16 30 2 | |
822 | * 2001::/32 5 5 | |
823 | * fc00::/7 3 13 | |
824 | * ::/96 1 3 | |
825 | * fec0::/10 1 11 | |
826 | * 3ffe::/16 1 12 | |
827 | */ | |
828 | static u_char get_label(host_t *ip) | |
829 | { | |
830 | struct { | |
831 | chunk_t net; | |
832 | u_char prefix; | |
833 | u_char label; | |
834 | } priorities[] = { | |
835 | /* priority table ordered by prefix */ | |
836 | /* ::1/128 */ | |
837 | { chunk_from_chars(0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | |
838 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01), 128, 0 }, | |
839 | /* ::ffff:0:0/96 */ | |
840 | { chunk_from_chars(0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | |
841 | 0x00, 0x00, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00), 96, 4 }, | |
842 | /* ::/96 */ | |
843 | { chunk_from_chars(0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | |
844 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00), 96, 3 }, | |
845 | /* 2001::/32 */ | |
846 | { chunk_from_chars(0x20, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | |
847 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00), 32, 5 }, | |
848 | /* 2002::/16 */ | |
849 | { chunk_from_chars(0x20, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | |
850 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00), 16, 2 }, | |
851 | /* 3ffe::/16 */ | |
852 | { chunk_from_chars(0x3f, 0xfe, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | |
853 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00), 16, 12 }, | |
854 | /* fec0::/10 */ | |
855 | { chunk_from_chars(0xfe, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | |
856 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00), 10, 11 }, | |
857 | /* fc00::/7 */ | |
858 | { chunk_from_chars(0xfc, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | |
859 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00), 7, 13 }, | |
860 | }; | |
861 | int i; | |
862 | ||
863 | for (i = 0; i < countof(priorities); i++) | |
864 | { | |
865 | if (host_in_subnet(ip, priorities[i].net, priorities[i].prefix)) | |
866 | { | |
867 | return priorities[i].label; | |
868 | } | |
869 | } | |
870 | /* ::/0 */ | |
871 | return 1; | |
872 | } | |
873 | ||
3bf98189 TB |
874 | /** |
875 | * Returns the length of the common prefix in bits up to the length of a's | |
876 | * prefix, defined by RFC 6724 as the portion of the address not including the | |
877 | * interface ID, which is 64-bit for most unicast addresses (see RFC 4291). | |
878 | */ | |
879 | static u_char common_prefix(host_t *a, host_t *b) | |
880 | { | |
881 | chunk_t aa, ba; | |
882 | u_char byte, bits = 0, match; | |
883 | ||
884 | aa = a->get_address(a); | |
885 | ba = b->get_address(b); | |
886 | for (byte = 0; byte < 8; byte++) | |
887 | { | |
888 | if (aa.ptr[byte] != ba.ptr[byte]) | |
889 | { | |
890 | match = aa.ptr[byte] ^ ba.ptr[byte]; | |
891 | for (bits = 8; match; match >>= 1) | |
892 | { | |
893 | bits--; | |
894 | } | |
895 | break; | |
896 | } | |
897 | } | |
898 | return byte * 8 + bits; | |
899 | } | |
900 | ||
901 | /** | |
902 | * Compare two IP addresses and return TRUE if the second address is the better | |
903 | * choice of the two to reach the destination. | |
904 | * For IPv6 we approximately follow RFC 6724. | |
905 | */ | |
906 | static bool is_address_better(private_kernel_netlink_net_t *this, | |
907 | addr_entry_t *a, addr_entry_t *b, host_t *d) | |
908 | { | |
7a40162c | 909 | u_char sa, sb, sd, la, lb, ld, pa, pb; |
3bf98189 TB |
910 | |
911 | /* rule 2: prefer appropriate scope */ | |
912 | if (d) | |
913 | { | |
914 | sa = get_scope(a->ip); | |
915 | sb = get_scope(b->ip); | |
916 | sd = get_scope(d); | |
917 | if (sa < sb) | |
918 | { | |
919 | return sa < sd; | |
920 | } | |
921 | else if (sb < sa) | |
922 | { | |
923 | return sb >= sd; | |
924 | } | |
925 | } | |
926 | if (a->ip->get_family(a->ip) == AF_INET) | |
927 | { /* stop here for IPv4, default to addresses found earlier */ | |
928 | return FALSE; | |
929 | } | |
930 | /* rule 3: avoid deprecated addresses (RFC 4862) */ | |
931 | if ((a->flags & IFA_F_DEPRECATED) != (b->flags & IFA_F_DEPRECATED)) | |
932 | { | |
933 | return a->flags & IFA_F_DEPRECATED; | |
934 | } | |
935 | /* rule 4 is not applicable as we don't know if an address is a home or | |
936 | * care-of addresses. | |
937 | * rule 5 does not apply as we only compare addresses from one interface | |
3bf98189 | 938 | */ |
7a40162c TB |
939 | /* rule 6: prefer matching label */ |
940 | if (d) | |
941 | { | |
942 | la = get_label(a->ip); | |
943 | lb = get_label(b->ip); | |
944 | ld = get_label(d); | |
945 | if (la == ld && lb != ld) | |
946 | { | |
947 | return FALSE; | |
948 | } | |
949 | else if (lb == ld && la != ld) | |
950 | { | |
951 | return TRUE; | |
952 | } | |
953 | } | |
3bf98189 TB |
954 | /* rule 7: prefer temporary addresses (WE REVERSE THIS BY DEFAULT!) */ |
955 | if ((a->flags & IFA_F_TEMPORARY) != (b->flags & IFA_F_TEMPORARY)) | |
956 | { | |
957 | if (this->prefer_temporary_addrs) | |
958 | { | |
959 | return b->flags & IFA_F_TEMPORARY; | |
960 | } | |
961 | return a->flags & IFA_F_TEMPORARY; | |
962 | } | |
963 | /* rule 8: use longest matching prefix */ | |
964 | if (d) | |
965 | { | |
966 | pa = common_prefix(a->ip, d); | |
967 | pb = common_prefix(b->ip, d); | |
968 | if (pa != pb) | |
969 | { | |
970 | return pb > pa; | |
971 | } | |
972 | } | |
973 | /* default to addresses found earlier */ | |
974 | return FALSE; | |
975 | } | |
976 | ||
977 | /** | |
bfc595a3 TB |
978 | * Get a non-virtual IP address on the given interfaces and optionally in a |
979 | * given subnet. | |
3bf98189 TB |
980 | * |
981 | * If a candidate address is given, we first search for that address and if not | |
da6d86dd | 982 | * found return the address as above. |
3bf98189 | 983 | * Returned host is a clone, has to be freed by caller. |
a25d536e | 984 | * |
3bf98189 | 985 | * this->lock must be held when calling this function. |
29607690 | 986 | */ |
bfc595a3 TB |
987 | static host_t *get_matching_address(private_kernel_netlink_net_t *this, |
988 | int *ifindex, int family, chunk_t net, | |
989 | uint8_t mask, host_t *dest, | |
990 | host_t *candidate) | |
29607690 | 991 | { |
bfc595a3 | 992 | enumerator_t *ifaces, *addrs; |
29607690 | 993 | iface_entry_t *iface; |
3bf98189 | 994 | addr_entry_t *addr, *best = NULL; |
bfc595a3 | 995 | bool candidate_matched = FALSE; |
29607690 | 996 | |
bfc595a3 TB |
997 | ifaces = this->ifaces->create_enumerator(this->ifaces); |
998 | while (ifaces->enumerate(ifaces, &iface)) | |
29607690 | 999 | { |
bfc595a3 TB |
1000 | if (iface->usable && (!ifindex || iface->ifindex == *ifindex)) |
1001 | { /* only use matching interfaces not excluded by config */ | |
29607690 TB |
1002 | addrs = iface->addrs->create_enumerator(iface->addrs); |
1003 | while (addrs->enumerate(addrs, &addr)) | |
1004 | { | |
3bf98189 TB |
1005 | if (addr->refcount || |
1006 | addr->ip->get_family(addr->ip) != family) | |
1007 | { /* ignore virtual IP addresses and ensure family matches */ | |
da6d86dd TB |
1008 | continue; |
1009 | } | |
bfc595a3 TB |
1010 | if (net.ptr && !host_in_subnet(addr->ip, net, mask)) |
1011 | { /* optionally match a subnet */ | |
1012 | continue; | |
1013 | } | |
3bf98189 TB |
1014 | if (candidate && candidate->ip_equals(candidate, addr->ip)) |
1015 | { /* stop if we find the candidate */ | |
1016 | best = addr; | |
bfc595a3 | 1017 | candidate_matched = TRUE; |
3bf98189 TB |
1018 | break; |
1019 | } | |
1020 | else if (!best || is_address_better(this, best, addr, dest)) | |
da6d86dd | 1021 | { |
3bf98189 | 1022 | best = addr; |
29607690 TB |
1023 | } |
1024 | } | |
1025 | addrs->destroy(addrs); | |
bfc595a3 TB |
1026 | if (ifindex || candidate_matched) |
1027 | { | |
1028 | break; | |
1029 | } | |
29607690 TB |
1030 | } |
1031 | } | |
bfc595a3 | 1032 | ifaces->destroy(ifaces); |
3bf98189 | 1033 | return best ? best->ip->clone(best->ip) : NULL; |
29607690 TB |
1034 | } |
1035 | ||
bfc595a3 TB |
1036 | /** |
1037 | * Get a non-virtual IP address on the given interface. | |
1038 | * | |
1039 | * If a candidate address is given, we first search for that address and if not | |
1040 | * found return the address as above. | |
1041 | * Returned host is a clone, has to be freed by caller. | |
1042 | * | |
1043 | * this->lock must be held when calling this function. | |
1044 | */ | |
1045 | static host_t *get_interface_address(private_kernel_netlink_net_t *this, | |
1046 | int ifindex, int family, host_t *dest, | |
1047 | host_t *candidate) | |
1048 | { | |
1049 | return get_matching_address(this, &ifindex, family, chunk_empty, 0, dest, | |
1050 | candidate); | |
1051 | } | |
1052 | ||
1053 | /** | |
1054 | * Get a non-virtual IP address in the given subnet. | |
1055 | * | |
1056 | * If a candidate address is given, we first search for that address and if not | |
1057 | * found return the address as above. | |
1058 | * Returned host is a clone, has to be freed by caller. | |
1059 | * | |
1060 | * this->lock must be held when calling this function. | |
1061 | */ | |
1062 | static host_t *get_subnet_address(private_kernel_netlink_net_t *this, | |
1063 | int family, chunk_t net, uint8_t mask, | |
1064 | host_t *dest, host_t *candidate) | |
1065 | { | |
1066 | return get_matching_address(this, NULL, family, net, mask, dest, candidate); | |
1067 | } | |
1068 | ||
507f26f6 | 1069 | /** |
ba26508d | 1070 | * callback function that raises the delayed roam event |
507f26f6 | 1071 | */ |
77d4a028 | 1072 | static job_requeue_t roam_event(private_kernel_netlink_net_t *this) |
ba26508d | 1073 | { |
77d4a028 TB |
1074 | bool address; |
1075 | ||
1076 | this->roam_lock->lock(this->roam_lock); | |
1077 | address = this->roam_address; | |
1078 | this->roam_address = FALSE; | |
1079 | this->roam_lock->unlock(this->roam_lock); | |
8394ea2a | 1080 | charon->kernel->roam(charon->kernel, address); |
ba26508d TB |
1081 | return JOB_REQUEUE_NONE; |
1082 | } | |
1083 | ||
1084 | /** | |
1085 | * fire a roaming event. we delay it for a bit and fire only one event | |
1086 | * for multiple calls. otherwise we would create too many events. | |
1087 | */ | |
1088 | static void fire_roam_event(private_kernel_netlink_net_t *this, bool address) | |
507f26f6 | 1089 | { |
de578445 | 1090 | timeval_t now; |
ba26508d | 1091 | job_t *job; |
7daf5226 | 1092 | |
37873f99 TB |
1093 | if (!this->roam_events) |
1094 | { | |
1095 | return; | |
1096 | } | |
1097 | ||
de578445 | 1098 | time_monotonic(&now); |
4134108c | 1099 | this->roam_lock->lock(this->roam_lock); |
11f46853 | 1100 | this->roam_address |= address; |
4134108c | 1101 | if (!timercmp(&now, &this->next_roam, >)) |
507f26f6 | 1102 | { |
4134108c TB |
1103 | this->roam_lock->unlock(this->roam_lock); |
1104 | return; | |
507f26f6 | 1105 | } |
eecd41e3 | 1106 | timeval_add_ms(&now, ROAM_DELAY); |
4134108c TB |
1107 | this->next_roam = now; |
1108 | this->roam_lock->unlock(this->roam_lock); | |
1109 | ||
1110 | job = (job_t*)callback_job_create((callback_job_cb_t)roam_event, | |
77d4a028 | 1111 | this, NULL, NULL); |
4134108c | 1112 | lib->scheduler->schedule_job_ms(lib->scheduler, job, ROAM_DELAY); |
507f26f6 TB |
1113 | } |
1114 | ||
940e1b0f TB |
1115 | /** |
1116 | * check if an interface with a given index is up and usable | |
c6b40158 | 1117 | * |
a25d536e | 1118 | * this->lock must be locked when calling this function |
940e1b0f TB |
1119 | */ |
1120 | static bool is_interface_up_and_usable(private_kernel_netlink_net_t *this, | |
1121 | int index) | |
1122 | { | |
1123 | iface_entry_t *iface; | |
1124 | ||
2e4d110d TB |
1125 | if (this->ifaces->find_first(this->ifaces, iface_entry_by_index, |
1126 | (void**)&iface, index)) | |
940e1b0f TB |
1127 | { |
1128 | return iface_entry_up_and_usable(iface); | |
1129 | } | |
1130 | return FALSE; | |
1131 | } | |
1132 | ||
c6b40158 TB |
1133 | /** |
1134 | * unregister the current addr_entry_t from the hashtable it is stored in | |
1135 | * | |
a25d536e | 1136 | * this->lock must be locked when calling this function |
c6b40158 | 1137 | */ |
8a2e4d4a TB |
1138 | CALLBACK(addr_entry_unregister, void, |
1139 | addr_entry_t *addr, va_list args) | |
c6b40158 | 1140 | { |
8a2e4d4a TB |
1141 | private_kernel_netlink_net_t *this; |
1142 | iface_entry_t *iface; | |
1143 | ||
1144 | VA_ARGS_VGET(args, iface, this); | |
c6b40158 TB |
1145 | if (addr->refcount) |
1146 | { | |
1147 | addr_map_entry_remove(this->vips, addr, iface); | |
1148 | this->condvar->broadcast(this->condvar); | |
1149 | return; | |
1150 | } | |
1151 | addr_map_entry_remove(this->addrs, addr, iface); | |
1152 | } | |
1153 | ||
507f26f6 TB |
1154 | /** |
1155 | * process RTM_NEWLINK/RTM_DELLINK from kernel | |
1156 | */ | |
1157 | static void process_link(private_kernel_netlink_net_t *this, | |
1158 | struct nlmsghdr *hdr, bool event) | |
1159 | { | |
4c438cf0 | 1160 | struct ifinfomsg* msg = NLMSG_DATA(hdr); |
507f26f6 TB |
1161 | struct rtattr *rta = IFLA_RTA(msg); |
1162 | size_t rtasize = IFLA_PAYLOAD (hdr); | |
e13389a7 | 1163 | enumerator_t *enumerator; |
507f26f6 TB |
1164 | iface_entry_t *current, *entry = NULL; |
1165 | char *name = NULL; | |
f834249c | 1166 | bool update = FALSE, update_routes = FALSE; |
7daf5226 | 1167 | |
f834249c | 1168 | while (RTA_OK(rta, rtasize)) |
507f26f6 TB |
1169 | { |
1170 | switch (rta->rta_type) | |
1171 | { | |
1172 | case IFLA_IFNAME: | |
1173 | name = RTA_DATA(rta); | |
1174 | break; | |
1175 | } | |
1176 | rta = RTA_NEXT(rta, rtasize); | |
1177 | } | |
1178 | if (!name) | |
1179 | { | |
1180 | name = "(unknown)"; | |
1181 | } | |
7daf5226 | 1182 | |
a25d536e | 1183 | this->lock->write_lock(this->lock); |
507f26f6 TB |
1184 | switch (hdr->nlmsg_type) |
1185 | { | |
1186 | case RTM_NEWLINK: | |
1187 | { | |
2e4d110d TB |
1188 | if (!this->ifaces->find_first(this->ifaces, iface_entry_by_index, |
1189 | (void**)&entry, msg->ifi_index)) | |
507f26f6 | 1190 | { |
c6b40158 TB |
1191 | INIT(entry, |
1192 | .ifindex = msg->ifi_index, | |
1193 | .addrs = linked_list_create(), | |
c6b40158 | 1194 | ); |
507f26f6 TB |
1195 | this->ifaces->insert_last(this->ifaces, entry); |
1196 | } | |
f526b35c | 1197 | strncpy(entry->ifname, name, IFNAMSIZ); |
507f26f6 | 1198 | entry->ifname[IFNAMSIZ-1] = '\0'; |
062a34e7 TB |
1199 | entry->usable = charon->kernel->is_interface_usable(charon->kernel, |
1200 | name); | |
940e1b0f | 1201 | if (event && entry->usable) |
507f26f6 TB |
1202 | { |
1203 | if (!(entry->flags & IFF_UP) && (msg->ifi_flags & IFF_UP)) | |
1204 | { | |
f834249c | 1205 | update = update_routes = TRUE; |
507f26f6 TB |
1206 | DBG1(DBG_KNL, "interface %s activated", name); |
1207 | } | |
1208 | if ((entry->flags & IFF_UP) && !(msg->ifi_flags & IFF_UP)) | |
1209 | { | |
1210 | update = TRUE; | |
1211 | DBG1(DBG_KNL, "interface %s deactivated", name); | |
1212 | } | |
1213 | } | |
1214 | entry->flags = msg->ifi_flags; | |
507f26f6 TB |
1215 | break; |
1216 | } | |
1217 | case RTM_DELLINK: | |
1218 | { | |
e13389a7 MW |
1219 | enumerator = this->ifaces->create_enumerator(this->ifaces); |
1220 | while (enumerator->enumerate(enumerator, ¤t)) | |
507f26f6 TB |
1221 | { |
1222 | if (current->ifindex == msg->ifi_index) | |
1223 | { | |
940e1b0f | 1224 | if (event && current->usable) |
7b218736 MP |
1225 | { |
1226 | update = TRUE; | |
1227 | DBG1(DBG_KNL, "interface %s deleted", current->ifname); | |
1228 | } | |
c6b40158 TB |
1229 | /* TODO: move virtual IPs installed on this interface to |
1230 | * another interface? */ | |
7b218736 | 1231 | this->ifaces->remove_at(this->ifaces, enumerator); |
1f97e1aa | 1232 | current->addrs->invoke_function(current->addrs, |
8a2e4d4a | 1233 | addr_entry_unregister, current, this); |
7b218736 | 1234 | iface_entry_destroy(current); |
507f26f6 TB |
1235 | break; |
1236 | } | |
1237 | } | |
e13389a7 | 1238 | enumerator->destroy(enumerator); |
507f26f6 TB |
1239 | break; |
1240 | } | |
1241 | } | |
a25d536e | 1242 | this->lock->unlock(this->lock); |
7daf5226 | 1243 | |
f834249c TB |
1244 | if (update_routes && event) |
1245 | { | |
c732e220 | 1246 | queue_route_reinstall(this, strdup(name)); |
f834249c TB |
1247 | } |
1248 | ||
507f26f6 TB |
1249 | if (update && event) |
1250 | { | |
ba26508d | 1251 | fire_roam_event(this, TRUE); |
507f26f6 TB |
1252 | } |
1253 | } | |
1254 | ||
1255 | /** | |
1256 | * process RTM_NEWADDR/RTM_DELADDR from kernel | |
1257 | */ | |
1258 | static void process_addr(private_kernel_netlink_net_t *this, | |
1259 | struct nlmsghdr *hdr, bool event) | |
1260 | { | |
4c438cf0 | 1261 | struct ifaddrmsg* msg = NLMSG_DATA(hdr); |
507f26f6 TB |
1262 | struct rtattr *rta = IFA_RTA(msg); |
1263 | size_t rtasize = IFA_PAYLOAD (hdr); | |
1264 | host_t *host = NULL; | |
507f26f6 | 1265 | iface_entry_t *iface; |
507f26f6 | 1266 | chunk_t local = chunk_empty, address = chunk_empty; |
f834249c | 1267 | char *route_ifname = NULL; |
507f26f6 | 1268 | bool update = FALSE, found = FALSE, changed = FALSE; |
7daf5226 | 1269 | |
f834249c | 1270 | while (RTA_OK(rta, rtasize)) |
507f26f6 TB |
1271 | { |
1272 | switch (rta->rta_type) | |
1273 | { | |
1274 | case IFA_LOCAL: | |
1275 | local.ptr = RTA_DATA(rta); | |
1276 | local.len = RTA_PAYLOAD(rta); | |
1277 | break; | |
1278 | case IFA_ADDRESS: | |
1279 | address.ptr = RTA_DATA(rta); | |
1280 | address.len = RTA_PAYLOAD(rta); | |
1281 | break; | |
1282 | } | |
1283 | rta = RTA_NEXT(rta, rtasize); | |
1284 | } | |
7daf5226 | 1285 | |
507f26f6 TB |
1286 | /* For PPP interfaces, we need the IFA_LOCAL address, |
1287 | * IFA_ADDRESS is the peers address. But IFA_LOCAL is | |
1288 | * not included in all cases (IPv6?), so fallback to IFA_ADDRESS. */ | |
1289 | if (local.ptr) | |
1290 | { | |
1291 | host = host_create_from_chunk(msg->ifa_family, local, 0); | |
1292 | } | |
1293 | else if (address.ptr) | |
1294 | { | |
1295 | host = host_create_from_chunk(msg->ifa_family, address, 0); | |
1296 | } | |
7daf5226 | 1297 | |
507f26f6 TB |
1298 | if (host == NULL) |
1299 | { /* bad family? */ | |
1300 | return; | |
1301 | } | |
7daf5226 | 1302 | |
a25d536e | 1303 | this->lock->write_lock(this->lock); |
2e4d110d TB |
1304 | if (this->ifaces->find_first(this->ifaces, iface_entry_by_index, |
1305 | (void**)&iface, msg->ifa_index)) | |
507f26f6 | 1306 | { |
c6b40158 TB |
1307 | addr_map_entry_t *entry, lookup = { |
1308 | .ip = host, | |
1309 | .iface = iface, | |
1310 | }; | |
1311 | addr_entry_t *addr; | |
1312 | ||
1313 | entry = this->vips->get(this->vips, &lookup); | |
1314 | if (entry) | |
507f26f6 | 1315 | { |
c6b40158 TB |
1316 | if (hdr->nlmsg_type == RTM_NEWADDR) |
1317 | { /* mark as installed and signal waiting threads */ | |
1318 | entry->addr->installed = TRUE; | |
1319 | } | |
1320 | else | |
1321 | { /* the address was already marked as uninstalled */ | |
1322 | addr = entry->addr; | |
1323 | iface->addrs->remove(iface->addrs, addr, NULL); | |
1324 | addr_map_entry_remove(this->vips, addr, iface); | |
1325 | addr_entry_destroy(addr); | |
1326 | } | |
1327 | /* no roam events etc. for virtual IPs */ | |
1328 | this->condvar->broadcast(this->condvar); | |
a25d536e | 1329 | this->lock->unlock(this->lock); |
c6b40158 TB |
1330 | host->destroy(host); |
1331 | return; | |
1332 | } | |
1333 | entry = this->addrs->get(this->addrs, &lookup); | |
1334 | if (entry) | |
1335 | { | |
1336 | if (hdr->nlmsg_type == RTM_DELADDR) | |
507f26f6 | 1337 | { |
c6b40158 TB |
1338 | found = TRUE; |
1339 | addr = entry->addr; | |
1340 | iface->addrs->remove(iface->addrs, addr, NULL); | |
1341 | if (iface->usable) | |
507f26f6 | 1342 | { |
c6b40158 TB |
1343 | changed = TRUE; |
1344 | DBG1(DBG_KNL, "%H disappeared from %s", host, | |
1345 | iface->ifname); | |
507f26f6 | 1346 | } |
c6b40158 TB |
1347 | addr_map_entry_remove(this->addrs, addr, iface); |
1348 | addr_entry_destroy(addr); | |
507f26f6 | 1349 | } |
c6b40158 TB |
1350 | } |
1351 | else | |
1352 | { | |
507f26f6 TB |
1353 | if (hdr->nlmsg_type == RTM_NEWADDR) |
1354 | { | |
c6b40158 TB |
1355 | found = TRUE; |
1356 | changed = TRUE; | |
1357 | route_ifname = strdup(iface->ifname); | |
1358 | INIT(addr, | |
1359 | .ip = host->clone(host), | |
3bf98189 | 1360 | .flags = msg->ifa_flags, |
c6b40158 TB |
1361 | .scope = msg->ifa_scope, |
1362 | ); | |
1363 | iface->addrs->insert_last(iface->addrs, addr); | |
1364 | addr_map_entry_add(this->addrs, addr, iface); | |
1365 | if (event && iface->usable) | |
507f26f6 | 1366 | { |
c6b40158 | 1367 | DBG1(DBG_KNL, "%H appeared on %s", host, iface->ifname); |
507f26f6 TB |
1368 | } |
1369 | } | |
c6b40158 TB |
1370 | } |
1371 | if (found && (iface->flags & IFF_UP)) | |
1372 | { | |
1373 | update = TRUE; | |
1374 | } | |
1375 | if (!iface->usable) | |
1376 | { /* ignore events for interfaces excluded by config */ | |
1377 | update = changed = FALSE; | |
507f26f6 TB |
1378 | } |
1379 | } | |
a25d536e | 1380 | this->lock->unlock(this->lock); |
f834249c TB |
1381 | |
1382 | if (update && event && route_ifname) | |
1383 | { | |
c732e220 | 1384 | queue_route_reinstall(this, route_ifname); |
f834249c TB |
1385 | } |
1386 | else | |
1387 | { | |
1388 | free(route_ifname); | |
1389 | } | |
507f26f6 | 1390 | host->destroy(host); |
7daf5226 | 1391 | |
507f26f6 TB |
1392 | /* send an update to all IKE_SAs */ |
1393 | if (update && event && changed) | |
1394 | { | |
ba26508d | 1395 | fire_roam_event(this, TRUE); |
507f26f6 TB |
1396 | } |
1397 | } | |
1398 | ||
1399 | /** | |
1400 | * process RTM_NEWROUTE and RTM_DELROUTE from kernel | |
1401 | */ | |
1402 | static void process_route(private_kernel_netlink_net_t *this, struct nlmsghdr *hdr) | |
1403 | { | |
4c438cf0 | 1404 | struct rtmsg* msg = NLMSG_DATA(hdr); |
507f26f6 TB |
1405 | struct rtattr *rta = RTM_RTA(msg); |
1406 | size_t rtasize = RTM_PAYLOAD(hdr); | |
b12c53ce | 1407 | uint32_t rta_oif = 0; |
507f26f6 | 1408 | host_t *host = NULL; |
7daf5226 | 1409 | |
ec0c756d TB |
1410 | /* ignore routes added by us or in the local routing table (local addrs) */ |
1411 | if (msg->rtm_table && (msg->rtm_table == this->routing_table || | |
1412 | msg->rtm_table == RT_TABLE_LOCAL)) | |
85be7e5b MW |
1413 | { |
1414 | return; | |
1415 | } | |
8ec51f83 TB |
1416 | else if (msg->rtm_flags & RTM_F_CLONED) |
1417 | { /* ignore cached routes, seem to be created a lot for IPv6 */ | |
1418 | return; | |
1419 | } | |
7daf5226 | 1420 | |
507f26f6 TB |
1421 | while (RTA_OK(rta, rtasize)) |
1422 | { | |
1423 | switch (rta->rta_type) | |
1424 | { | |
1425 | case RTA_PREFSRC: | |
862ef49f | 1426 | DESTROY_IF(host); |
507f26f6 TB |
1427 | host = host_create_from_chunk(msg->rtm_family, |
1428 | chunk_create(RTA_DATA(rta), RTA_PAYLOAD(rta)), 0); | |
1429 | break; | |
29607690 TB |
1430 | case RTA_OIF: |
1431 | if (RTA_PAYLOAD(rta) == sizeof(rta_oif)) | |
1432 | { | |
b12c53ce | 1433 | rta_oif = *(uint32_t*)RTA_DATA(rta); |
29607690 TB |
1434 | } |
1435 | break; | |
507f26f6 TB |
1436 | } |
1437 | rta = RTA_NEXT(rta, rtasize); | |
1438 | } | |
a25d536e | 1439 | this->lock->read_lock(this->lock); |
940e1b0f TB |
1440 | if (rta_oif && !is_interface_up_and_usable(this, rta_oif)) |
1441 | { /* ignore route changes for interfaces that are ignored or down */ | |
a25d536e | 1442 | this->lock->unlock(this->lock); |
940e1b0f TB |
1443 | DESTROY_IF(host); |
1444 | return; | |
1445 | } | |
29607690 TB |
1446 | if (!host && rta_oif) |
1447 | { | |
3bf98189 TB |
1448 | host = get_interface_address(this, rta_oif, msg->rtm_family, |
1449 | NULL, NULL); | |
29607690 | 1450 | } |
a25d536e TB |
1451 | if (!host || is_known_vip(this, host)) |
1452 | { /* ignore routes added for virtual IPs */ | |
1453 | this->lock->unlock(this->lock); | |
1454 | DESTROY_IF(host); | |
1455 | return; | |
507f26f6 | 1456 | } |
a25d536e TB |
1457 | this->lock->unlock(this->lock); |
1458 | fire_roam_event(this, FALSE); | |
1459 | host->destroy(host); | |
507f26f6 TB |
1460 | } |
1461 | ||
4664992f TB |
1462 | /** |
1463 | * process RTM_NEW|DELRULE from kernel | |
1464 | */ | |
1465 | static void process_rule(private_kernel_netlink_net_t *this, struct nlmsghdr *hdr) | |
1466 | { | |
1467 | #ifdef HAVE_LINUX_FIB_RULES_H | |
1468 | struct rtmsg* msg = NLMSG_DATA(hdr); | |
1469 | struct rtattr *rta = RTM_RTA(msg); | |
1470 | size_t rtasize = RTM_PAYLOAD(hdr); | |
1471 | uint32_t table = 0; | |
1472 | ||
1473 | /* ignore rules added by us or in the local routing table (local addrs) */ | |
1474 | if (msg->rtm_table && (msg->rtm_table == this->routing_table || | |
1475 | msg->rtm_table == RT_TABLE_LOCAL)) | |
1476 | { | |
1477 | return; | |
1478 | } | |
1479 | ||
1480 | while (RTA_OK(rta, rtasize)) | |
1481 | { | |
1482 | switch (rta->rta_type) | |
1483 | { | |
1484 | case FRA_TABLE: | |
1485 | if (RTA_PAYLOAD(rta) == sizeof(table)) | |
1486 | { | |
1487 | table = *(uint32_t*)RTA_DATA(rta); | |
1488 | } | |
1489 | break; | |
1490 | } | |
1491 | rta = RTA_NEXT(rta, rtasize); | |
1492 | } | |
1493 | if (table && table == this->routing_table) | |
1494 | { /* also check against extended table ID */ | |
1495 | return; | |
1496 | } | |
1497 | fire_roam_event(this, FALSE); | |
1498 | #endif | |
1499 | } | |
1500 | ||
507f26f6 TB |
1501 | /** |
1502 | * Receives events from kernel | |
1503 | */ | |
f4f77d74 MW |
1504 | static bool receive_events(private_kernel_netlink_net_t *this, int fd, |
1505 | watcher_event_t event) | |
507f26f6 | 1506 | { |
ec331a7d | 1507 | char response[1536]; |
507f26f6 TB |
1508 | struct nlmsghdr *hdr = (struct nlmsghdr*)response; |
1509 | struct sockaddr_nl addr; | |
1510 | socklen_t addr_len = sizeof(addr); | |
4a5a5dd2 | 1511 | int len; |
7daf5226 | 1512 | |
f4f77d74 MW |
1513 | len = recvfrom(this->socket_events, response, sizeof(response), |
1514 | MSG_DONTWAIT, (struct sockaddr*)&addr, &addr_len); | |
507f26f6 TB |
1515 | if (len < 0) |
1516 | { | |
1517 | switch (errno) | |
1518 | { | |
1519 | case EINTR: | |
1520 | /* interrupted, try again */ | |
f4f77d74 | 1521 | return TRUE; |
507f26f6 TB |
1522 | case EAGAIN: |
1523 | /* no data ready, select again */ | |
f4f77d74 | 1524 | return TRUE; |
507f26f6 | 1525 | default: |
a0178fe2 TB |
1526 | DBG1(DBG_KNL, "unable to receive from RT event socket %s (%d)", |
1527 | strerror(errno), errno); | |
507f26f6 | 1528 | sleep(1); |
f4f77d74 | 1529 | return TRUE; |
507f26f6 TB |
1530 | } |
1531 | } | |
7daf5226 | 1532 | |
507f26f6 TB |
1533 | if (addr.nl_pid != 0) |
1534 | { /* not from kernel. not interested, try another one */ | |
f4f77d74 | 1535 | return TRUE; |
507f26f6 | 1536 | } |
7daf5226 | 1537 | |
507f26f6 TB |
1538 | while (NLMSG_OK(hdr, len)) |
1539 | { | |
1540 | /* looks good so far, dispatch netlink message */ | |
1541 | switch (hdr->nlmsg_type) | |
1542 | { | |
1543 | case RTM_NEWADDR: | |
1544 | case RTM_DELADDR: | |
1545 | process_addr(this, hdr, TRUE); | |
507f26f6 TB |
1546 | break; |
1547 | case RTM_NEWLINK: | |
1548 | case RTM_DELLINK: | |
1549 | process_link(this, hdr, TRUE); | |
507f26f6 TB |
1550 | break; |
1551 | case RTM_NEWROUTE: | |
1552 | case RTM_DELROUTE: | |
1553 | if (this->process_route) | |
1554 | { | |
1555 | process_route(this, hdr); | |
1556 | } | |
1557 | break; | |
4664992f TB |
1558 | case RTM_NEWRULE: |
1559 | case RTM_DELRULE: | |
1560 | if (this->process_rules) | |
1561 | { | |
1562 | process_rule(this, hdr); | |
1563 | } | |
1564 | break; | |
507f26f6 TB |
1565 | default: |
1566 | break; | |
1567 | } | |
1568 | hdr = NLMSG_NEXT(hdr, len); | |
1569 | } | |
f4f77d74 | 1570 | return TRUE; |
507f26f6 TB |
1571 | } |
1572 | ||
1573 | /** enumerator over addresses */ | |
1574 | typedef struct { | |
1575 | private_kernel_netlink_net_t* this; | |
4106aea8 TB |
1576 | /** which addresses to enumerate */ |
1577 | kernel_address_type_t which; | |
507f26f6 TB |
1578 | } address_enumerator_t; |
1579 | ||
525cc46c TB |
1580 | CALLBACK(address_enumerator_destroy, void, |
1581 | address_enumerator_t *data) | |
507f26f6 | 1582 | { |
a25d536e | 1583 | data->this->lock->unlock(data->this->lock); |
507f26f6 TB |
1584 | free(data); |
1585 | } | |
1586 | ||
525cc46c TB |
1587 | CALLBACK(filter_addresses, bool, |
1588 | address_enumerator_t *data, enumerator_t *orig, va_list args) | |
507f26f6 | 1589 | { |
525cc46c TB |
1590 | addr_entry_t *addr; |
1591 | host_t **out; | |
1592 | ||
1593 | VA_ARGS_VGET(args, out); | |
1594 | ||
1595 | while (orig->enumerate(orig, &addr)) | |
1596 | { | |
1597 | if (!(data->which & ADDR_TYPE_VIRTUAL) && addr->refcount) | |
1598 | { /* skip virtual interfaces added by us */ | |
1599 | continue; | |
1600 | } | |
1601 | if (!(data->which & ADDR_TYPE_REGULAR) && !addr->refcount) | |
1602 | { /* address is regular, but not requested */ | |
1603 | continue; | |
1604 | } | |
1605 | if (addr->scope >= RT_SCOPE_LINK) | |
1606 | { /* skip addresses with a unusable scope */ | |
1607 | continue; | |
1608 | } | |
1609 | *out = addr->ip; | |
1610 | return TRUE; | |
507f26f6 | 1611 | } |
525cc46c | 1612 | return FALSE; |
507f26f6 TB |
1613 | } |
1614 | ||
1615 | /** | |
1616 | * enumerator constructor for interfaces | |
1617 | */ | |
887abfb1 MW |
1618 | static enumerator_t *create_iface_enumerator(iface_entry_t *iface, |
1619 | address_enumerator_t *data) | |
507f26f6 | 1620 | { |
887abfb1 | 1621 | return enumerator_create_filter( |
525cc46c TB |
1622 | iface->addrs->create_enumerator(iface->addrs), |
1623 | filter_addresses, data, NULL); | |
507f26f6 TB |
1624 | } |
1625 | ||
525cc46c TB |
1626 | CALLBACK(filter_interfaces, bool, |
1627 | address_enumerator_t *data, enumerator_t *orig, va_list args) | |
507f26f6 | 1628 | { |
525cc46c TB |
1629 | iface_entry_t *iface, **out; |
1630 | ||
1631 | VA_ARGS_VGET(args, out); | |
1632 | ||
1633 | while (orig->enumerate(orig, &iface)) | |
1634 | { | |
1635 | if (!(data->which & ADDR_TYPE_IGNORED) && !iface->usable) | |
1636 | { /* skip interfaces excluded by config */ | |
1637 | continue; | |
1638 | } | |
1639 | if (!(data->which & ADDR_TYPE_LOOPBACK) && (iface->flags & IFF_LOOPBACK)) | |
1640 | { /* ignore loopback devices */ | |
1641 | continue; | |
1642 | } | |
1643 | if (!(data->which & ADDR_TYPE_DOWN) && !(iface->flags & IFF_UP)) | |
1644 | { /* skip interfaces not up */ | |
1645 | continue; | |
1646 | } | |
1647 | *out = iface; | |
1648 | return TRUE; | |
507f26f6 | 1649 | } |
525cc46c | 1650 | return FALSE; |
507f26f6 TB |
1651 | } |
1652 | ||
887abfb1 | 1653 | METHOD(kernel_net_t, create_address_enumerator, enumerator_t*, |
4106aea8 | 1654 | private_kernel_netlink_net_t *this, kernel_address_type_t which) |
507f26f6 | 1655 | { |
1a2a8bff MW |
1656 | address_enumerator_t *data; |
1657 | ||
1658 | INIT(data, | |
1659 | .this = this, | |
1660 | .which = which, | |
1661 | ); | |
7daf5226 | 1662 | |
a25d536e | 1663 | this->lock->read_lock(this->lock); |
507f26f6 | 1664 | return enumerator_create_nested( |
887abfb1 MW |
1665 | enumerator_create_filter( |
1666 | this->ifaces->create_enumerator(this->ifaces), | |
525cc46c | 1667 | filter_interfaces, data, NULL), |
887abfb1 | 1668 | (void*)create_iface_enumerator, data, |
525cc46c | 1669 | address_enumerator_destroy); |
507f26f6 TB |
1670 | } |
1671 | ||
9ba36c0f TB |
1672 | METHOD(kernel_net_t, get_interface_name, bool, |
1673 | private_kernel_netlink_net_t *this, host_t* ip, char **name) | |
507f26f6 | 1674 | { |
1f97e1aa TB |
1675 | addr_map_entry_t *entry, lookup = { |
1676 | .ip = ip, | |
1677 | }; | |
7daf5226 | 1678 | |
645d7a5e TB |
1679 | if (ip->is_anyaddr(ip)) |
1680 | { | |
1681 | return FALSE; | |
1682 | } | |
a25d536e | 1683 | this->lock->read_lock(this->lock); |
1f97e1aa TB |
1684 | /* first try to find it on an up and usable interface */ |
1685 | entry = this->addrs->get_match(this->addrs, &lookup, | |
1686 | (void*)addr_map_entry_match_up_and_usable); | |
1687 | if (entry) | |
507f26f6 | 1688 | { |
1f97e1aa | 1689 | if (name) |
507f26f6 | 1690 | { |
1f97e1aa TB |
1691 | *name = strdup(entry->iface->ifname); |
1692 | DBG2(DBG_KNL, "%H is on interface %s", ip, *name); | |
507f26f6 | 1693 | } |
a25d536e | 1694 | this->lock->unlock(this->lock); |
1f97e1aa | 1695 | return TRUE; |
507f26f6 | 1696 | } |
544c2e3d MW |
1697 | /* in a second step, consider virtual IPs installed by us */ |
1698 | entry = this->vips->get_match(this->vips, &lookup, | |
1699 | (void*)addr_map_entry_match_up_and_usable); | |
1700 | if (entry) | |
1701 | { | |
1702 | if (name) | |
1703 | { | |
1704 | *name = strdup(entry->iface->ifname); | |
5310f485 | 1705 | DBG2(DBG_KNL, "virtual IP %H is on interface %s", ip, *name); |
544c2e3d MW |
1706 | } |
1707 | this->lock->unlock(this->lock); | |
1708 | return TRUE; | |
1709 | } | |
1f97e1aa TB |
1710 | /* maybe it is installed on an ignored interface */ |
1711 | entry = this->addrs->get_match(this->addrs, &lookup, | |
1712 | (void*)addr_map_entry_match_up); | |
1713 | if (!entry) | |
507f26f6 | 1714 | { |
1f97e1aa | 1715 | DBG2(DBG_KNL, "%H is not a local address or the interface is down", ip); |
507f26f6 | 1716 | } |
a25d536e | 1717 | this->lock->unlock(this->lock); |
1f97e1aa | 1718 | return FALSE; |
507f26f6 TB |
1719 | } |
1720 | ||
1721 | /** | |
1722 | * get the index of an interface by name | |
1723 | */ | |
1724 | static int get_interface_index(private_kernel_netlink_net_t *this, char* name) | |
1725 | { | |
507f26f6 TB |
1726 | iface_entry_t *iface; |
1727 | int ifindex = 0; | |
7daf5226 | 1728 | |
507f26f6 | 1729 | DBG2(DBG_KNL, "getting iface index for %s", name); |
7daf5226 | 1730 | |
a25d536e | 1731 | this->lock->read_lock(this->lock); |
2e4d110d TB |
1732 | if (this->ifaces->find_first(this->ifaces, iface_entry_by_name, |
1733 | (void**)&iface, name)) | |
507f26f6 | 1734 | { |
c6b40158 | 1735 | ifindex = iface->ifindex; |
507f26f6 | 1736 | } |
a25d536e | 1737 | this->lock->unlock(this->lock); |
507f26f6 TB |
1738 | |
1739 | if (ifindex == 0) | |
1740 | { | |
1741 | DBG1(DBG_KNL, "unable to get interface index for %s", name); | |
1742 | } | |
1743 | return ifindex; | |
1744 | } | |
1745 | ||
66e9165b TB |
1746 | /** |
1747 | * get the name of an interface by index (allocated) | |
1748 | */ | |
1749 | static char *get_interface_name_by_index(private_kernel_netlink_net_t *this, | |
1750 | int index) | |
1751 | { | |
1752 | iface_entry_t *iface; | |
1753 | char *name = NULL; | |
1754 | ||
1755 | DBG2(DBG_KNL, "getting iface name for index %d", index); | |
1756 | ||
1757 | this->lock->read_lock(this->lock); | |
2e4d110d TB |
1758 | if (this->ifaces->find_first(this->ifaces, iface_entry_by_index, |
1759 | (void**)&iface, index)) | |
66e9165b TB |
1760 | { |
1761 | name = strdup(iface->ifname); | |
1762 | } | |
1763 | this->lock->unlock(this->lock); | |
1764 | ||
1765 | if (!name) | |
1766 | { | |
1767 | DBG1(DBG_KNL, "unable to get interface name for %d", index); | |
1768 | } | |
1769 | return name; | |
1770 | } | |
1771 | ||
66253465 TB |
1772 | /** |
1773 | * Store information about a route retrieved via RTNETLINK | |
1774 | */ | |
1775 | typedef struct { | |
1776 | chunk_t gtw; | |
bfc595a3 | 1777 | chunk_t pref_src; |
66253465 | 1778 | chunk_t dst; |
bfc595a3 | 1779 | chunk_t src; |
66253465 | 1780 | host_t *src_host; |
b12c53ce | 1781 | uint8_t dst_len; |
bfc595a3 | 1782 | uint8_t src_len; |
b12c53ce AS |
1783 | uint32_t table; |
1784 | uint32_t oif; | |
1785 | uint32_t priority; | |
66253465 TB |
1786 | } rt_entry_t; |
1787 | ||
1788 | /** | |
1789 | * Free a route entry | |
1790 | */ | |
1791 | static void rt_entry_destroy(rt_entry_t *this) | |
1792 | { | |
1793 | DESTROY_IF(this->src_host); | |
1794 | free(this); | |
1795 | } | |
1796 | ||
6716c652 TB |
1797 | /** |
1798 | * Check if the route received with RTM_NEWROUTE is usable based on its type. | |
1799 | */ | |
1800 | static bool route_usable(struct nlmsghdr *hdr) | |
1801 | { | |
1802 | struct rtmsg *msg; | |
1803 | ||
1804 | msg = NLMSG_DATA(hdr); | |
1805 | switch (msg->rtm_type) | |
1806 | { | |
1807 | case RTN_BLACKHOLE: | |
1808 | case RTN_UNREACHABLE: | |
1809 | case RTN_PROHIBIT: | |
1810 | case RTN_THROW: | |
1811 | return FALSE; | |
1812 | default: | |
1813 | return TRUE; | |
1814 | } | |
1815 | } | |
1816 | ||
66253465 TB |
1817 | /** |
1818 | * Parse route received with RTM_NEWROUTE. The given rt_entry_t object will be | |
1819 | * reused if not NULL. | |
1820 | * | |
1821 | * Returned chunks point to internal data of the Netlink message. | |
1822 | */ | |
1823 | static rt_entry_t *parse_route(struct nlmsghdr *hdr, rt_entry_t *route) | |
1824 | { | |
1825 | struct rtattr *rta; | |
1826 | struct rtmsg *msg; | |
1827 | size_t rtasize; | |
1828 | ||
4c438cf0 | 1829 | msg = NLMSG_DATA(hdr); |
66253465 TB |
1830 | rta = RTM_RTA(msg); |
1831 | rtasize = RTM_PAYLOAD(hdr); | |
1832 | ||
1833 | if (route) | |
1834 | { | |
d9400f44 TB |
1835 | *route = (rt_entry_t){ |
1836 | .dst_len = msg->rtm_dst_len, | |
1837 | .src_len = msg->rtm_src_len, | |
1838 | .table = msg->rtm_table, | |
1839 | }; | |
66253465 TB |
1840 | } |
1841 | else | |
1842 | { | |
1843 | INIT(route, | |
1844 | .dst_len = msg->rtm_dst_len, | |
bfc595a3 | 1845 | .src_len = msg->rtm_src_len, |
66253465 TB |
1846 | .table = msg->rtm_table, |
1847 | ); | |
1848 | } | |
1849 | ||
1850 | while (RTA_OK(rta, rtasize)) | |
1851 | { | |
1852 | switch (rta->rta_type) | |
1853 | { | |
1854 | case RTA_PREFSRC: | |
bfc595a3 | 1855 | route->pref_src = chunk_create(RTA_DATA(rta), RTA_PAYLOAD(rta)); |
66253465 TB |
1856 | break; |
1857 | case RTA_GATEWAY: | |
1858 | route->gtw = chunk_create(RTA_DATA(rta), RTA_PAYLOAD(rta)); | |
1859 | break; | |
1860 | case RTA_DST: | |
1861 | route->dst = chunk_create(RTA_DATA(rta), RTA_PAYLOAD(rta)); | |
1862 | break; | |
bfc595a3 TB |
1863 | case RTA_SRC: |
1864 | route->src = chunk_create(RTA_DATA(rta), RTA_PAYLOAD(rta)); | |
1865 | break; | |
66253465 TB |
1866 | case RTA_OIF: |
1867 | if (RTA_PAYLOAD(rta) == sizeof(route->oif)) | |
1868 | { | |
b12c53ce | 1869 | route->oif = *(uint32_t*)RTA_DATA(rta); |
66253465 TB |
1870 | } |
1871 | break; | |
6b577902 MW |
1872 | case RTA_PRIORITY: |
1873 | if (RTA_PAYLOAD(rta) == sizeof(route->priority)) | |
1874 | { | |
b12c53ce | 1875 | route->priority = *(uint32_t*)RTA_DATA(rta); |
6b577902 MW |
1876 | } |
1877 | break; | |
66253465 TB |
1878 | #ifdef HAVE_RTA_TABLE |
1879 | case RTA_TABLE: | |
1880 | if (RTA_PAYLOAD(rta) == sizeof(route->table)) | |
1881 | { | |
b12c53ce | 1882 | route->table = *(uint32_t*)RTA_DATA(rta); |
66253465 TB |
1883 | } |
1884 | break; | |
1885 | #endif /* HAVE_RTA_TABLE*/ | |
1886 | } | |
1887 | rta = RTA_NEXT(rta, rtasize); | |
1888 | } | |
1889 | return route; | |
1890 | } | |
1891 | ||
507f26f6 TB |
1892 | /** |
1893 | * Get a route: If "nexthop", the nexthop is returned. source addr otherwise. | |
1894 | */ | |
1895 | static host_t *get_route(private_kernel_netlink_net_t *this, host_t *dest, | |
de7cb6de | 1896 | int prefix, bool nexthop, host_t *candidate, |
99a57aa5 | 1897 | char **iface, u_int recursion) |
507f26f6 | 1898 | { |
21bf86f7 | 1899 | netlink_buf_t request; |
507f26f6 TB |
1900 | struct nlmsghdr *hdr, *out, *current; |
1901 | struct rtmsg *msg; | |
1902 | chunk_t chunk; | |
1903 | size_t len; | |
66253465 TB |
1904 | linked_list_t *routes; |
1905 | rt_entry_t *route = NULL, *best = NULL; | |
d266e895 | 1906 | enumerator_t *enumerator; |
66253465 | 1907 | host_t *addr = NULL; |
de7cb6de TB |
1908 | bool match_net; |
1909 | int family; | |
7daf5226 | 1910 | |
cbd52e7d TB |
1911 | if (recursion > MAX_ROUTE_RECURSION) |
1912 | { | |
1913 | return NULL; | |
1914 | } | |
de7cb6de TB |
1915 | chunk = dest->get_address(dest); |
1916 | len = chunk.len * 8; | |
1917 | prefix = prefix < 0 ? len : min(prefix, len); | |
1918 | match_net = prefix != len; | |
cbd52e7d | 1919 | |
507f26f6 TB |
1920 | memset(&request, 0, sizeof(request)); |
1921 | ||
de7cb6de | 1922 | family = dest->get_family(dest); |
0404a29b | 1923 | hdr = &request.hdr; |
5be75c2c | 1924 | hdr->nlmsg_flags = NLM_F_REQUEST; |
507f26f6 TB |
1925 | hdr->nlmsg_type = RTM_GETROUTE; |
1926 | hdr->nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)); | |
1927 | ||
4c438cf0 | 1928 | msg = NLMSG_DATA(hdr); |
de7cb6de | 1929 | msg->rtm_family = family; |
6bd1216e TB |
1930 | if (!match_net && this->rta_mark && this->routing_mark.value) |
1931 | { | |
1932 | /* if our routing rule excludes packets with a certain mark we can | |
1933 | * get the preferred route without having to dump all routes */ | |
1934 | chunk = chunk_from_thing(this->routing_mark.value); | |
1935 | netlink_add_attribute(hdr, RTA_MARK, chunk, sizeof(request)); | |
1936 | } | |
1937 | else if (family == AF_INET || this->rta_prefsrc_for_ipv6 || | |
1938 | this->routing_table || match_net) | |
1939 | { /* kernels prior to 3.0 do not support RTA_PREFSRC for IPv6 routes. | |
1940 | * as we want to ignore routes with virtual IPs we cannot use DUMP | |
1941 | * if these routes are not installed in a separate table */ | |
558691b3 MW |
1942 | if (this->install_routes) |
1943 | { | |
1944 | hdr->nlmsg_flags |= NLM_F_DUMP; | |
1945 | } | |
6bd1216e | 1946 | } |
ce5b1708 MW |
1947 | if (candidate) |
1948 | { | |
1949 | chunk = candidate->get_address(candidate); | |
395500b8 MW |
1950 | if (hdr->nlmsg_flags & NLM_F_DUMP) |
1951 | { | |
1952 | netlink_add_attribute(hdr, RTA_PREFSRC, chunk, sizeof(request)); | |
1953 | } | |
1954 | else | |
1955 | { | |
1956 | netlink_add_attribute(hdr, RTA_SRC, chunk, sizeof(request)); | |
1957 | } | |
ce5b1708 | 1958 | } |
0ed9430d TB |
1959 | /* we use this below to match against the routes */ |
1960 | chunk = dest->get_address(dest); | |
de7cb6de TB |
1961 | if (!match_net) |
1962 | { | |
de7cb6de TB |
1963 | netlink_add_attribute(hdr, RTA_DST, chunk, sizeof(request)); |
1964 | } | |
7daf5226 | 1965 | |
507f26f6 TB |
1966 | if (this->socket->send(this->socket, hdr, &out, &len) != SUCCESS) |
1967 | { | |
de7cb6de TB |
1968 | DBG2(DBG_KNL, "getting %s to reach %H/%d failed", |
1969 | nexthop ? "nexthop" : "address", dest, prefix); | |
507f26f6 TB |
1970 | return NULL; |
1971 | } | |
66253465 | 1972 | routes = linked_list_create(); |
a25d536e | 1973 | this->lock->read_lock(this->lock); |
36b7ba5e MW |
1974 | |
1975 | for (current = out; NLMSG_OK(current, len); | |
1976 | current = NLMSG_NEXT(current, len)) | |
507f26f6 TB |
1977 | { |
1978 | switch (current->nlmsg_type) | |
1979 | { | |
1980 | case NLMSG_DONE: | |
1981 | break; | |
1982 | case RTM_NEWROUTE: | |
1983 | { | |
66253465 | 1984 | rt_entry_t *other; |
d266e895 | 1985 | uintptr_t table; |
7daf5226 | 1986 | |
6716c652 TB |
1987 | if (!route_usable(current)) |
1988 | { | |
1989 | continue; | |
1990 | } | |
66253465 TB |
1991 | route = parse_route(current, route); |
1992 | ||
1993 | table = (uintptr_t)route->table; | |
1994 | if (this->rt_exclude->find_first(this->rt_exclude, NULL, | |
2e4d110d | 1995 | (void**)&table)) |
66253465 | 1996 | { /* route is from an excluded routing table */ |
d266e895 TE |
1997 | continue; |
1998 | } | |
fb6c8591 | 1999 | if (this->routing_table != 0 && |
66253465 | 2000 | route->table == this->routing_table) |
fb6c8591 | 2001 | { /* route is from our own ipsec routing table */ |
36b7ba5e | 2002 | continue; |
fb6c8591 | 2003 | } |
940e1b0f | 2004 | if (route->oif && !is_interface_up_and_usable(this, route->oif)) |
d1769942 | 2005 | { /* interface is down */ |
36b7ba5e | 2006 | continue; |
fb6c8591 | 2007 | } |
de7cb6de | 2008 | if (!addr_in_subnet(chunk, prefix, route->dst, route->dst_len)) |
d1769942 | 2009 | { /* route destination does not contain dest */ |
36b7ba5e | 2010 | continue; |
fb6c8591 | 2011 | } |
bfc595a3 | 2012 | if (route->pref_src.ptr) |
66253465 TB |
2013 | { /* verify source address, if any */ |
2014 | host_t *src = host_create_from_chunk(msg->rtm_family, | |
bfc595a3 | 2015 | route->pref_src, 0); |
c6b40158 | 2016 | if (src && is_known_vip(this, src)) |
66253465 TB |
2017 | { /* ignore routes installed by us */ |
2018 | src->destroy(src); | |
2019 | continue; | |
507f26f6 | 2020 | } |
66253465 | 2021 | route->src_host = src; |
fb6c8591 | 2022 | } |
3f4cc30b | 2023 | /* insert route, sorted by network prefix and priority */ |
66253465 TB |
2024 | enumerator = routes->create_enumerator(routes); |
2025 | while (enumerator->enumerate(enumerator, &other)) | |
2026 | { | |
3f4cc30b | 2027 | if (route->dst_len > other->dst_len) |
6b577902 MW |
2028 | { |
2029 | break; | |
2030 | } | |
3f4cc30b TB |
2031 | if (route->dst_len == other->dst_len && |
2032 | route->priority < other->priority) | |
507f26f6 | 2033 | { |
66253465 | 2034 | break; |
507f26f6 TB |
2035 | } |
2036 | } | |
66253465 TB |
2037 | routes->insert_before(routes, enumerator, route); |
2038 | enumerator->destroy(enumerator); | |
2039 | route = NULL; | |
36b7ba5e | 2040 | continue; |
507f26f6 TB |
2041 | } |
2042 | default: | |
507f26f6 TB |
2043 | continue; |
2044 | } | |
2045 | break; | |
2046 | } | |
66253465 TB |
2047 | if (route) |
2048 | { | |
2049 | rt_entry_destroy(route); | |
2050 | } | |
2051 | ||
2052 | /* now we have a list of routes matching dest, sorted by net prefix. | |
2053 | * we will look for source addresses for these routes and select the one | |
2054 | * with the preferred source address, if possible */ | |
2055 | enumerator = routes->create_enumerator(routes); | |
2056 | while (enumerator->enumerate(enumerator, &route)) | |
2057 | { | |
2058 | if (route->src_host) | |
2059 | { /* got a source address with the route, if no preferred source | |
2060 | * is given or it matches we are done, as this is the best route */ | |
2061 | if (!candidate || candidate->ip_equals(candidate, route->src_host)) | |
2062 | { | |
2063 | best = route; | |
2064 | break; | |
2065 | } | |
2066 | else if (route->oif) | |
2067 | { /* no match yet, maybe it is assigned to the same interface */ | |
2068 | host_t *src = get_interface_address(this, route->oif, | |
3bf98189 | 2069 | msg->rtm_family, dest, candidate); |
66253465 TB |
2070 | if (src && src->ip_equals(src, candidate)) |
2071 | { | |
2072 | route->src_host->destroy(route->src_host); | |
2073 | route->src_host = src; | |
2074 | best = route; | |
2075 | break; | |
2076 | } | |
2077 | DESTROY_IF(src); | |
2078 | } | |
2079 | /* no luck yet with the source address. if this is the best (first) | |
2080 | * route we store it as fallback in case we don't find a route with | |
2081 | * the preferred source */ | |
2082 | best = best ?: route; | |
2083 | continue; | |
2084 | } | |
bfc595a3 TB |
2085 | if (route->src.ptr) |
2086 | { /* no src, but a source selector, try to find a matching address */ | |
2087 | route->src_host = get_subnet_address(this, msg->rtm_family, | |
2088 | route->src, route->src_len, dest, | |
2089 | candidate); | |
2090 | if (route->src_host) | |
2091 | { /* we handle this address the same as the one above */ | |
2092 | if (!candidate || | |
2093 | candidate->ip_equals(candidate, route->src_host)) | |
2094 | { | |
2095 | best = route; | |
2096 | break; | |
2097 | } | |
2098 | best = best ?: route; | |
2099 | continue; | |
2100 | } | |
2101 | } | |
66253465 TB |
2102 | if (route->oif) |
2103 | { /* no src, but an interface - get address from it */ | |
2104 | route->src_host = get_interface_address(this, route->oif, | |
3bf98189 | 2105 | msg->rtm_family, dest, candidate); |
66253465 | 2106 | if (route->src_host) |
bfc595a3 | 2107 | { /* more of the same */ |
66253465 TB |
2108 | if (!candidate || |
2109 | candidate->ip_equals(candidate, route->src_host)) | |
2110 | { | |
2111 | best = route; | |
2112 | break; | |
2113 | } | |
2114 | best = best ?: route; | |
2115 | continue; | |
2116 | } | |
2117 | } | |
2118 | if (route->gtw.ptr) | |
2119 | { /* no src, no iface, but a gateway - lookup src to reach gtw */ | |
2120 | host_t *gtw; | |
2121 | ||
2122 | gtw = host_create_from_chunk(msg->rtm_family, route->gtw, 0); | |
5be88ca6 TB |
2123 | if (gtw && !gtw->ip_equals(gtw, dest)) |
2124 | { | |
de7cb6de | 2125 | route->src_host = get_route(this, gtw, -1, FALSE, candidate, |
99a57aa5 | 2126 | iface, recursion + 1); |
5be88ca6 TB |
2127 | } |
2128 | DESTROY_IF(gtw); | |
66253465 TB |
2129 | if (route->src_host) |
2130 | { /* more of the same */ | |
2131 | if (!candidate || | |
2132 | candidate->ip_equals(candidate, route->src_host)) | |
2133 | { | |
2134 | best = route; | |
2135 | break; | |
2136 | } | |
2137 | best = best ?: route; | |
2138 | } | |
2139 | } | |
2140 | } | |
2141 | enumerator->destroy(enumerator); | |
7daf5226 | 2142 | |
507f26f6 | 2143 | if (nexthop) |
66e9165b | 2144 | { /* nexthop lookup, return gateway and oif if any */ |
99a57aa5 TB |
2145 | if (iface) |
2146 | { | |
2147 | *iface = NULL; | |
2148 | } | |
66253465 TB |
2149 | if (best || routes->get_first(routes, (void**)&best) == SUCCESS) |
2150 | { | |
2151 | addr = host_create_from_chunk(msg->rtm_family, best->gtw, 0); | |
a63a7af1 | 2152 | if (iface && best->oif) |
66e9165b | 2153 | { |
a63a7af1 | 2154 | *iface = get_interface_name_by_index(this, best->oif); |
66e9165b | 2155 | } |
66253465 | 2156 | } |
de7cb6de TB |
2157 | if (!addr && !match_net) |
2158 | { /* fallback to destination address */ | |
2159 | addr = dest->clone(dest); | |
2160 | } | |
66253465 TB |
2161 | } |
2162 | else | |
507f26f6 | 2163 | { |
66253465 | 2164 | if (best) |
507f26f6 | 2165 | { |
66253465 | 2166 | addr = best->src_host->clone(best->src_host); |
507f26f6 | 2167 | } |
507f26f6 | 2168 | } |
a25d536e | 2169 | this->lock->unlock(this->lock); |
66253465 TB |
2170 | routes->destroy_function(routes, (void*)rt_entry_destroy); |
2171 | free(out); | |
2172 | ||
2173 | if (addr) | |
2174 | { | |
66e9165b TB |
2175 | if (nexthop && iface && *iface) |
2176 | { | |
2177 | DBG2(DBG_KNL, "using %H as nexthop and %s as dev to reach %H/%d", | |
2178 | addr, *iface, dest, prefix); | |
2179 | } | |
2180 | else | |
2181 | { | |
2182 | DBG2(DBG_KNL, "using %H as %s to reach %H/%d", addr, | |
2183 | nexthop ? "nexthop" : "address", dest, prefix); | |
2184 | } | |
66253465 | 2185 | } |
cbd52e7d | 2186 | else if (!recursion) |
66253465 | 2187 | { |
de7cb6de TB |
2188 | DBG2(DBG_KNL, "no %s found to reach %H/%d", |
2189 | nexthop ? "nexthop" : "address", dest, prefix); | |
66253465 TB |
2190 | } |
2191 | return addr; | |
507f26f6 TB |
2192 | } |
2193 | ||
887abfb1 MW |
2194 | METHOD(kernel_net_t, get_source_addr, host_t*, |
2195 | private_kernel_netlink_net_t *this, host_t *dest, host_t *src) | |
507f26f6 | 2196 | { |
99a57aa5 | 2197 | return get_route(this, dest, -1, FALSE, src, NULL, 0); |
507f26f6 TB |
2198 | } |
2199 | ||
887abfb1 | 2200 | METHOD(kernel_net_t, get_nexthop, host_t*, |
99a57aa5 TB |
2201 | private_kernel_netlink_net_t *this, host_t *dest, int prefix, host_t *src, |
2202 | char **iface) | |
507f26f6 | 2203 | { |
99a57aa5 | 2204 | return get_route(this, dest, prefix, TRUE, src, iface, 0); |
507f26f6 TB |
2205 | } |
2206 | ||
eac584a3 TB |
2207 | /** enumerator over subnets */ |
2208 | typedef struct { | |
2209 | enumerator_t public; | |
2210 | private_kernel_netlink_net_t *private; | |
2211 | /** message from the kernel */ | |
2212 | struct nlmsghdr *msg; | |
2213 | /** current message from the kernel */ | |
2214 | struct nlmsghdr *current; | |
2215 | /** remaining length */ | |
2216 | size_t len; | |
2217 | /** last subnet enumerated */ | |
2218 | host_t *net; | |
24064741 TB |
2219 | /** interface of current net */ |
2220 | char ifname[IFNAMSIZ]; | |
eac584a3 TB |
2221 | } subnet_enumerator_t; |
2222 | ||
2223 | METHOD(enumerator_t, destroy_subnet_enumerator, void, | |
2224 | subnet_enumerator_t *this) | |
2225 | { | |
2226 | DESTROY_IF(this->net); | |
2227 | free(this->msg); | |
2228 | free(this); | |
2229 | } | |
2230 | ||
2231 | METHOD(enumerator_t, enumerate_subnets, bool, | |
95a63bf2 | 2232 | subnet_enumerator_t *this, va_list args) |
eac584a3 | 2233 | { |
95a63bf2 TB |
2234 | host_t **net; |
2235 | uint8_t *mask; | |
2236 | char **ifname; | |
2237 | ||
2238 | VA_ARGS_VGET(args, net, mask, ifname); | |
2239 | ||
eac584a3 TB |
2240 | if (!this->current) |
2241 | { | |
2242 | this->current = this->msg; | |
2243 | } | |
2244 | else | |
2245 | { | |
2246 | this->current = NLMSG_NEXT(this->current, this->len); | |
2247 | DESTROY_IF(this->net); | |
2248 | this->net = NULL; | |
2249 | } | |
2250 | ||
2251 | while (NLMSG_OK(this->current, this->len)) | |
2252 | { | |
2253 | switch (this->current->nlmsg_type) | |
2254 | { | |
2255 | case NLMSG_DONE: | |
2256 | break; | |
2257 | case RTM_NEWROUTE: | |
2258 | { | |
9189aec6 | 2259 | rt_entry_t route; |
eac584a3 TB |
2260 | |
2261 | if (!route_usable(this->current)) | |
2262 | { | |
2263 | break; | |
2264 | } | |
9189aec6 TB |
2265 | parse_route(this->current, &route); |
2266 | ||
2267 | if (route.table && ( | |
2268 | route.table == RT_TABLE_LOCAL || | |
2269 | route.table == this->private->routing_table)) | |
eac584a3 TB |
2270 | { /* ignore our own and the local routing tables */ |
2271 | break; | |
2272 | } | |
9189aec6 TB |
2273 | else if (route.gtw.ptr) |
2274 | { /* ignore routes via gateway/next hop */ | |
2275 | break; | |
eac584a3 TB |
2276 | } |
2277 | ||
9189aec6 TB |
2278 | if (route.dst.ptr && route.oif && |
2279 | if_indextoname(route.oif, this->ifname)) | |
eac584a3 | 2280 | { |
9189aec6 | 2281 | this->net = host_create_from_chunk(AF_UNSPEC, route.dst, 0); |
eac584a3 | 2282 | *net = this->net; |
9189aec6 | 2283 | *mask = route.dst_len; |
24064741 | 2284 | *ifname = this->ifname; |
eac584a3 TB |
2285 | return TRUE; |
2286 | } | |
2287 | break; | |
2288 | } | |
2289 | default: | |
2290 | break; | |
2291 | } | |
2292 | this->current = NLMSG_NEXT(this->current, this->len); | |
2293 | } | |
2294 | return FALSE; | |
2295 | } | |
2296 | ||
2297 | METHOD(kernel_net_t, create_local_subnet_enumerator, enumerator_t*, | |
2298 | private_kernel_netlink_net_t *this) | |
2299 | { | |
2300 | netlink_buf_t request; | |
2301 | struct nlmsghdr *hdr, *out; | |
2302 | struct rtmsg *msg; | |
2303 | size_t len; | |
2304 | subnet_enumerator_t *enumerator; | |
2305 | ||
2306 | memset(&request, 0, sizeof(request)); | |
2307 | ||
2308 | hdr = &request.hdr; | |
2309 | hdr->nlmsg_flags = NLM_F_REQUEST; | |
2310 | hdr->nlmsg_type = RTM_GETROUTE; | |
2311 | hdr->nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)); | |
2312 | hdr->nlmsg_flags |= NLM_F_DUMP; | |
2313 | ||
2314 | msg = NLMSG_DATA(hdr); | |
2315 | msg->rtm_scope = RT_SCOPE_LINK; | |
2316 | ||
2317 | if (this->socket->send(this->socket, hdr, &out, &len) != SUCCESS) | |
2318 | { | |
2319 | DBG2(DBG_KNL, "enumerating local subnets failed"); | |
2320 | return enumerator_create_empty(); | |
2321 | } | |
2322 | ||
2323 | INIT(enumerator, | |
2324 | .public = { | |
95a63bf2 TB |
2325 | .enumerate = enumerator_enumerate_default, |
2326 | .venumerate = _enumerate_subnets, | |
eac584a3 TB |
2327 | .destroy = _destroy_subnet_enumerator, |
2328 | }, | |
2329 | .private = this, | |
2330 | .msg = out, | |
2331 | .len = len, | |
2332 | ); | |
2333 | return &enumerator->public; | |
2334 | } | |
2335 | ||
507f26f6 TB |
2336 | /** |
2337 | * Manages the creation and deletion of ip addresses on an interface. | |
2338 | * By setting the appropriate nlmsg_type, the ip will be set or unset. | |
2339 | */ | |
2340 | static status_t manage_ipaddr(private_kernel_netlink_net_t *this, int nlmsg_type, | |
50bd7558 | 2341 | int flags, int if_index, host_t *ip, int prefix) |
507f26f6 | 2342 | { |
21bf86f7 | 2343 | netlink_buf_t request; |
507f26f6 TB |
2344 | struct nlmsghdr *hdr; |
2345 | struct ifaddrmsg *msg; | |
2346 | chunk_t chunk; | |
7daf5226 | 2347 | |
507f26f6 | 2348 | memset(&request, 0, sizeof(request)); |
7daf5226 | 2349 | |
507f26f6 | 2350 | chunk = ip->get_address(ip); |
7daf5226 | 2351 | |
0404a29b | 2352 | hdr = &request.hdr; |
507f26f6 | 2353 | hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK | flags; |
7daf5226 | 2354 | hdr->nlmsg_type = nlmsg_type; |
507f26f6 | 2355 | hdr->nlmsg_len = NLMSG_LENGTH(sizeof(struct ifaddrmsg)); |
7daf5226 | 2356 | |
4c438cf0 | 2357 | msg = NLMSG_DATA(hdr); |
323f9f99 MW |
2358 | msg->ifa_family = ip->get_family(ip); |
2359 | msg->ifa_flags = 0; | |
50bd7558 | 2360 | msg->ifa_prefixlen = prefix < 0 ? chunk.len * 8 : prefix; |
323f9f99 MW |
2361 | msg->ifa_scope = RT_SCOPE_UNIVERSE; |
2362 | msg->ifa_index = if_index; | |
7daf5226 | 2363 | |
507f26f6 TB |
2364 | netlink_add_attribute(hdr, IFA_LOCAL, chunk, sizeof(request)); |
2365 | ||
b062d3cc TB |
2366 | if (ip->get_family(ip) == AF_INET6) |
2367 | { | |
3c36c955 | 2368 | #ifdef IFA_F_NODAD |
b062d3cc | 2369 | msg->ifa_flags |= IFA_F_NODAD; |
3c36c955 | 2370 | #endif |
b062d3cc TB |
2371 | if (this->rta_prefsrc_for_ipv6) |
2372 | { | |
2373 | /* if source routes are possible we let the virtual IP get | |
2374 | * deprecated immediately (but mark it as valid forever) so it gets | |
2375 | * only used if forced by our route, and not by the default IPv6 | |
2376 | * address selection */ | |
2377 | struct ifa_cacheinfo cache = { | |
2378 | .ifa_valid = 0xFFFFFFFF, | |
2379 | .ifa_prefered = 0, | |
2380 | }; | |
2381 | netlink_add_attribute(hdr, IFA_CACHEINFO, chunk_from_thing(cache), | |
2382 | sizeof(request)); | |
2383 | } | |
90854d28 | 2384 | } |
507f26f6 TB |
2385 | return this->socket->send_ack(this->socket, hdr); |
2386 | } | |
2387 | ||
887abfb1 | 2388 | METHOD(kernel_net_t, add_ip, status_t, |
50bd7558 | 2389 | private_kernel_netlink_net_t *this, host_t *virtual_ip, int prefix, |
b185cdd1 | 2390 | char *iface_name) |
507f26f6 | 2391 | { |
c6b40158 TB |
2392 | addr_map_entry_t *entry, lookup = { |
2393 | .ip = virtual_ip, | |
2394 | }; | |
e8e9048f | 2395 | iface_entry_t *iface = NULL; |
7daf5226 | 2396 | |
9474a0d9 MW |
2397 | if (!this->install_virtual_ip) |
2398 | { /* disabled by config */ | |
2399 | return SUCCESS; | |
2400 | } | |
7daf5226 | 2401 | |
a25d536e | 2402 | this->lock->write_lock(this->lock); |
c6b40158 TB |
2403 | /* the virtual IP might actually be installed as regular IP, in which case |
2404 | * we don't track it as virtual IP */ | |
2405 | entry = this->addrs->get_match(this->addrs, &lookup, | |
2406 | (void*)addr_map_entry_match); | |
2407 | if (!entry) | |
2408 | { /* otherwise it might already be installed as virtual IP */ | |
2409 | entry = this->vips->get_match(this->vips, &lookup, | |
2410 | (void*)addr_map_entry_match); | |
2411 | if (entry) | |
2412 | { /* the vip we found can be in one of three states: 1) installed and | |
2413 | * ready, 2) just added by another thread, but not yet confirmed to | |
2414 | * be installed by the kernel, 3) just deleted, but not yet gone. | |
2415 | * Then while we wait below, several things could happen (as we | |
a25d536e | 2416 | * release the lock). For instance, the interface could disappear, |
e8e9048f | 2417 | * or the IP is finally deleted, and it reappears on a different |
c6b40158 TB |
2418 | * interface. All these cases are handled by the call below. */ |
2419 | while (!is_vip_installed_or_gone(this, virtual_ip, &entry)) | |
507f26f6 | 2420 | { |
a25d536e | 2421 | this->condvar->wait(this->condvar, this->lock); |
507f26f6 | 2422 | } |
c6b40158 | 2423 | if (entry) |
507f26f6 | 2424 | { |
c6b40158 | 2425 | entry->addr->refcount++; |
507f26f6 TB |
2426 | } |
2427 | } | |
c6b40158 TB |
2428 | } |
2429 | if (entry) | |
2430 | { | |
2431 | DBG2(DBG_KNL, "virtual IP %H is already installed on %s", virtual_ip, | |
2432 | entry->iface->ifname); | |
a25d536e | 2433 | this->lock->unlock(this->lock); |
c6b40158 TB |
2434 | return SUCCESS; |
2435 | } | |
e8e9048f TB |
2436 | /* try to find the target interface, either by config or via src ip */ |
2437 | if (!this->install_virtual_ip_on || | |
2e4d110d TB |
2438 | !this->ifaces->find_first(this->ifaces, iface_entry_by_name, |
2439 | (void**)&iface, this->install_virtual_ip_on)) | |
e8e9048f | 2440 | { |
2e4d110d TB |
2441 | if (!this->ifaces->find_first(this->ifaces, iface_entry_by_name, |
2442 | (void**)&iface, iface_name)) | |
e8e9048f TB |
2443 | { /* if we don't find the requested interface we just use the first */ |
2444 | this->ifaces->get_first(this->ifaces, (void**)&iface); | |
2445 | } | |
c6b40158 | 2446 | } |
c6b40158 TB |
2447 | if (iface) |
2448 | { | |
2449 | addr_entry_t *addr; | |
9b43dddf MW |
2450 | char *ifname; |
2451 | int ifi; | |
7daf5226 | 2452 | |
c6b40158 TB |
2453 | INIT(addr, |
2454 | .ip = virtual_ip->clone(virtual_ip), | |
2455 | .refcount = 1, | |
2456 | .scope = RT_SCOPE_UNIVERSE, | |
2457 | ); | |
2458 | iface->addrs->insert_last(iface->addrs, addr); | |
2459 | addr_map_entry_add(this->vips, addr, iface); | |
9b43dddf MW |
2460 | ifi = iface->ifindex; |
2461 | this->lock->unlock(this->lock); | |
c6b40158 | 2462 | if (manage_ipaddr(this, RTM_NEWADDR, NLM_F_CREATE | NLM_F_EXCL, |
9b43dddf | 2463 | ifi, virtual_ip, prefix) == SUCCESS) |
507f26f6 | 2464 | { |
9b43dddf | 2465 | this->lock->write_lock(this->lock); |
c6b40158 TB |
2466 | while (!is_vip_installed_or_gone(this, virtual_ip, &entry)) |
2467 | { /* wait until address appears */ | |
a25d536e | 2468 | this->condvar->wait(this->condvar, this->lock); |
c6b40158 TB |
2469 | } |
2470 | if (entry) | |
2471 | { /* we fail if the interface got deleted in the meantime */ | |
9b43dddf | 2472 | ifname = strdup(entry->iface->ifname); |
a25d536e | 2473 | this->lock->unlock(this->lock); |
9b43dddf MW |
2474 | DBG2(DBG_KNL, "virtual IP %H installed on %s", |
2475 | virtual_ip, ifname); | |
3dc9d427 MW |
2476 | /* during IKEv1 reauthentication, children get moved from |
2477 | * old the new SA before the virtual IP is available. This | |
2478 | * kills the route for our virtual IP, reinstall. */ | |
9b43dddf | 2479 | queue_route_reinstall(this, ifname); |
507f26f6 TB |
2480 | return SUCCESS; |
2481 | } | |
9b43dddf | 2482 | this->lock->unlock(this->lock); |
507f26f6 | 2483 | } |
c6b40158 TB |
2484 | DBG1(DBG_KNL, "adding virtual IP %H failed", virtual_ip); |
2485 | return FAILED; | |
507f26f6 | 2486 | } |
a25d536e | 2487 | this->lock->unlock(this->lock); |
c6b40158 TB |
2488 | DBG1(DBG_KNL, "no interface available, unable to install virtual IP %H", |
2489 | virtual_ip); | |
507f26f6 TB |
2490 | return FAILED; |
2491 | } | |
2492 | ||
887abfb1 | 2493 | METHOD(kernel_net_t, del_ip, status_t, |
d88597f0 MW |
2494 | private_kernel_netlink_net_t *this, host_t *virtual_ip, int prefix, |
2495 | bool wait) | |
507f26f6 | 2496 | { |
c6b40158 TB |
2497 | addr_map_entry_t *entry, lookup = { |
2498 | .ip = virtual_ip, | |
2499 | }; | |
7daf5226 | 2500 | |
9474a0d9 MW |
2501 | if (!this->install_virtual_ip) |
2502 | { /* disabled by config */ | |
2503 | return SUCCESS; | |
2504 | } | |
7daf5226 | 2505 | |
507f26f6 | 2506 | DBG2(DBG_KNL, "deleting virtual IP %H", virtual_ip); |
7daf5226 | 2507 | |
a25d536e | 2508 | this->lock->write_lock(this->lock); |
c6b40158 TB |
2509 | entry = this->vips->get_match(this->vips, &lookup, |
2510 | (void*)addr_map_entry_match); | |
2511 | if (!entry) | |
2512 | { /* we didn't install this IP as virtual IP */ | |
2513 | entry = this->addrs->get_match(this->addrs, &lookup, | |
2514 | (void*)addr_map_entry_match); | |
2515 | if (entry) | |
507f26f6 | 2516 | { |
c6b40158 TB |
2517 | DBG2(DBG_KNL, "not deleting existing IP %H on %s", virtual_ip, |
2518 | entry->iface->ifname); | |
a25d536e | 2519 | this->lock->unlock(this->lock); |
c6b40158 TB |
2520 | return SUCCESS; |
2521 | } | |
2522 | DBG2(DBG_KNL, "virtual IP %H not cached, unable to delete", virtual_ip); | |
a25d536e | 2523 | this->lock->unlock(this->lock); |
c6b40158 TB |
2524 | return FAILED; |
2525 | } | |
2526 | if (entry->addr->refcount == 1) | |
2527 | { | |
2528 | status_t status; | |
9b43dddf | 2529 | int ifi; |
c6b40158 TB |
2530 | |
2531 | /* we set this flag so that threads calling add_ip will block and wait | |
2532 | * until the entry is gone, also so we can wait below */ | |
2533 | entry->addr->installed = FALSE; | |
9b43dddf MW |
2534 | ifi = entry->iface->ifindex; |
2535 | this->lock->unlock(this->lock); | |
2536 | status = manage_ipaddr(this, RTM_DELADDR, 0, ifi, virtual_ip, prefix); | |
d88597f0 | 2537 | if (status == SUCCESS && wait) |
c6b40158 | 2538 | { /* wait until the address is really gone */ |
9b43dddf | 2539 | this->lock->write_lock(this->lock); |
c6b40158 | 2540 | while (is_known_vip(this, virtual_ip)) |
507f26f6 | 2541 | { |
a25d536e | 2542 | this->condvar->wait(this->condvar, this->lock); |
507f26f6 | 2543 | } |
9b43dddf | 2544 | this->lock->unlock(this->lock); |
507f26f6 | 2545 | } |
c6b40158 | 2546 | return status; |
507f26f6 | 2547 | } |
c6b40158 TB |
2548 | else |
2549 | { | |
2550 | entry->addr->refcount--; | |
2551 | } | |
2552 | DBG2(DBG_KNL, "virtual IP %H used by other SAs, not deleting", | |
2553 | virtual_ip); | |
a25d536e | 2554 | this->lock->unlock(this->lock); |
c6b40158 | 2555 | return SUCCESS; |
507f26f6 TB |
2556 | } |
2557 | ||
2558 | /** | |
2559 | * Manages source routes in the routing table. | |
2560 | * By setting the appropriate nlmsg_type, the route gets added or removed. | |
2561 | */ | |
74ba22c9 TB |
2562 | static status_t manage_srcroute(private_kernel_netlink_net_t *this, |
2563 | int nlmsg_type, int flags, chunk_t dst_net, | |
b12c53ce | 2564 | uint8_t prefixlen, host_t *gateway, |
74ba22c9 | 2565 | host_t *src_ip, char *if_name) |
507f26f6 | 2566 | { |
21bf86f7 | 2567 | netlink_buf_t request; |
507f26f6 TB |
2568 | struct nlmsghdr *hdr; |
2569 | struct rtmsg *msg; | |
c1adf7e0 | 2570 | struct rtattr *rta; |
507f26f6 TB |
2571 | int ifindex; |
2572 | chunk_t chunk; | |
2573 | ||
2574 | /* if route is 0.0.0.0/0, we can't install it, as it would | |
2575 | * overwrite the default route. Instead, we add two routes: | |
2576 | * 0.0.0.0/1 and 128.0.0.0/1 */ | |
2577 | if (this->routing_table == 0 && prefixlen == 0) | |
2578 | { | |
2579 | chunk_t half_net; | |
b12c53ce | 2580 | uint8_t half_prefixlen; |
507f26f6 | 2581 | status_t status; |
7daf5226 | 2582 | |
507f26f6 TB |
2583 | half_net = chunk_alloca(dst_net.len); |
2584 | memset(half_net.ptr, 0, half_net.len); | |
2585 | half_prefixlen = 1; | |
7daf5226 | 2586 | |
507f26f6 TB |
2587 | status = manage_srcroute(this, nlmsg_type, flags, half_net, half_prefixlen, |
2588 | gateway, src_ip, if_name); | |
2589 | half_net.ptr[0] |= 0x80; | |
2590 | status = manage_srcroute(this, nlmsg_type, flags, half_net, half_prefixlen, | |
2591 | gateway, src_ip, if_name); | |
2592 | return status; | |
2593 | } | |
7daf5226 | 2594 | |
507f26f6 TB |
2595 | memset(&request, 0, sizeof(request)); |
2596 | ||
0404a29b | 2597 | hdr = &request.hdr; |
507f26f6 TB |
2598 | hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK | flags; |
2599 | hdr->nlmsg_type = nlmsg_type; | |
2600 | hdr->nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)); | |
2601 | ||
4c438cf0 | 2602 | msg = NLMSG_DATA(hdr); |
507f26f6 TB |
2603 | msg->rtm_family = src_ip->get_family(src_ip); |
2604 | msg->rtm_dst_len = prefixlen; | |
2605 | msg->rtm_table = this->routing_table; | |
2606 | msg->rtm_protocol = RTPROT_STATIC; | |
2607 | msg->rtm_type = RTN_UNICAST; | |
2608 | msg->rtm_scope = RT_SCOPE_UNIVERSE; | |
7daf5226 | 2609 | |
507f26f6 TB |
2610 | netlink_add_attribute(hdr, RTA_DST, dst_net, sizeof(request)); |
2611 | chunk = src_ip->get_address(src_ip); | |
2612 | netlink_add_attribute(hdr, RTA_PREFSRC, chunk, sizeof(request)); | |
5be75c2c MW |
2613 | if (gateway && gateway->get_family(gateway) == src_ip->get_family(src_ip)) |
2614 | { | |
2615 | chunk = gateway->get_address(gateway); | |
2616 | netlink_add_attribute(hdr, RTA_GATEWAY, chunk, sizeof(request)); | |
2617 | } | |
507f26f6 TB |
2618 | ifindex = get_interface_index(this, if_name); |
2619 | chunk.ptr = (char*)&ifindex; | |
2620 | chunk.len = sizeof(ifindex); | |
2621 | netlink_add_attribute(hdr, RTA_OIF, chunk, sizeof(request)); | |
2622 | ||
47a0e289 | 2623 | if (this->mtu || this->mss) |
c1adf7e0 | 2624 | { |
47a0e289 | 2625 | chunk = chunk_alloca(RTA_LENGTH((sizeof(struct rtattr) + |
b12c53ce | 2626 | sizeof(uint32_t)) * 2)); |
47a0e289 | 2627 | chunk.len = 0; |
c1adf7e0 | 2628 | rta = (struct rtattr*)chunk.ptr; |
47a0e289 TB |
2629 | if (this->mtu) |
2630 | { | |
2631 | rta->rta_type = RTAX_MTU; | |
b12c53ce AS |
2632 | rta->rta_len = RTA_LENGTH(sizeof(uint32_t)); |
2633 | memcpy(RTA_DATA(rta), &this->mtu, sizeof(uint32_t)); | |
47a0e289 TB |
2634 | chunk.len = rta->rta_len; |
2635 | } | |
2636 | if (this->mss) | |
2637 | { | |
2638 | rta = (struct rtattr*)(chunk.ptr + RTA_ALIGN(chunk.len)); | |
2639 | rta->rta_type = RTAX_ADVMSS; | |
b12c53ce AS |
2640 | rta->rta_len = RTA_LENGTH(sizeof(uint32_t)); |
2641 | memcpy(RTA_DATA(rta), &this->mss, sizeof(uint32_t)); | |
47a0e289 TB |
2642 | chunk.len = RTA_ALIGN(chunk.len) + rta->rta_len; |
2643 | } | |
c1adf7e0 TB |
2644 | netlink_add_attribute(hdr, RTA_METRICS, chunk, sizeof(request)); |
2645 | } | |
2646 | ||
507f26f6 TB |
2647 | return this->socket->send_ack(this->socket, hdr); |
2648 | } | |
2649 | ||
887abfb1 | 2650 | METHOD(kernel_net_t, add_route, status_t, |
b12c53ce | 2651 | private_kernel_netlink_net_t *this, chunk_t dst_net, uint8_t prefixlen, |
887abfb1 | 2652 | host_t *gateway, host_t *src_ip, char *if_name) |
507f26f6 | 2653 | { |
74ba22c9 TB |
2654 | status_t status; |
2655 | route_entry_t *found, route = { | |
2656 | .dst_net = dst_net, | |
2657 | .prefixlen = prefixlen, | |
2658 | .gateway = gateway, | |
2659 | .src_ip = src_ip, | |
2660 | .if_name = if_name, | |
2661 | }; | |
2662 | ||
16d62305 | 2663 | this->routes_lock->lock(this->routes_lock); |
74ba22c9 TB |
2664 | found = this->routes->get(this->routes, &route); |
2665 | if (found) | |
2666 | { | |
16d62305 | 2667 | this->routes_lock->unlock(this->routes_lock); |
74ba22c9 TB |
2668 | return ALREADY_DONE; |
2669 | } | |
74ba22c9 TB |
2670 | status = manage_srcroute(this, RTM_NEWROUTE, NLM_F_CREATE | NLM_F_EXCL, |
2671 | dst_net, prefixlen, gateway, src_ip, if_name); | |
f0f78b74 TB |
2672 | if (status == SUCCESS) |
2673 | { | |
2674 | found = route_entry_clone(&route); | |
2675 | this->routes->put(this->routes, found, found); | |
2676 | } | |
16d62305 | 2677 | this->routes_lock->unlock(this->routes_lock); |
74ba22c9 | 2678 | return status; |
507f26f6 | 2679 | } |
7daf5226 | 2680 | |
887abfb1 | 2681 | METHOD(kernel_net_t, del_route, status_t, |
b12c53ce | 2682 | private_kernel_netlink_net_t *this, chunk_t dst_net, uint8_t prefixlen, |
887abfb1 | 2683 | host_t *gateway, host_t *src_ip, char *if_name) |
507f26f6 | 2684 | { |
74ba22c9 TB |
2685 | status_t status; |
2686 | route_entry_t *found, route = { | |
2687 | .dst_net = dst_net, | |
2688 | .prefixlen = prefixlen, | |
2689 | .gateway = gateway, | |
2690 | .src_ip = src_ip, | |
2691 | .if_name = if_name, | |
2692 | }; | |
2693 | ||
16d62305 | 2694 | this->routes_lock->lock(this->routes_lock); |
74ba22c9 TB |
2695 | found = this->routes->get(this->routes, &route); |
2696 | if (!found) | |
2697 | { | |
16d62305 | 2698 | this->routes_lock->unlock(this->routes_lock); |
74ba22c9 TB |
2699 | return NOT_FOUND; |
2700 | } | |
2701 | this->routes->remove(this->routes, found); | |
2702 | route_entry_destroy(found); | |
2703 | status = manage_srcroute(this, RTM_DELROUTE, 0, dst_net, prefixlen, | |
2704 | gateway, src_ip, if_name); | |
16d62305 | 2705 | this->routes_lock->unlock(this->routes_lock); |
74ba22c9 | 2706 | return status; |
507f26f6 TB |
2707 | } |
2708 | ||
2709 | /** | |
2710 | * Initialize a list of local addresses. | |
2711 | */ | |
2712 | static status_t init_address_list(private_kernel_netlink_net_t *this) | |
2713 | { | |
21bf86f7 | 2714 | netlink_buf_t request; |
507f26f6 TB |
2715 | struct nlmsghdr *out, *current, *in; |
2716 | struct rtgenmsg *msg; | |
2717 | size_t len; | |
e13389a7 | 2718 | enumerator_t *ifaces, *addrs; |
507f26f6 TB |
2719 | iface_entry_t *iface; |
2720 | addr_entry_t *addr; | |
7daf5226 | 2721 | |
31a0e24b | 2722 | DBG2(DBG_KNL, "known interfaces and IP addresses:"); |
7daf5226 | 2723 | |
507f26f6 TB |
2724 | memset(&request, 0, sizeof(request)); |
2725 | ||
0404a29b | 2726 | in = &request.hdr; |
507f26f6 TB |
2727 | in->nlmsg_len = NLMSG_LENGTH(sizeof(struct rtgenmsg)); |
2728 | in->nlmsg_flags = NLM_F_REQUEST | NLM_F_MATCH | NLM_F_ROOT; | |
4c438cf0 | 2729 | msg = NLMSG_DATA(in); |
507f26f6 | 2730 | msg->rtgen_family = AF_UNSPEC; |
7daf5226 | 2731 | |
507f26f6 TB |
2732 | /* get all links */ |
2733 | in->nlmsg_type = RTM_GETLINK; | |
2734 | if (this->socket->send(this->socket, in, &out, &len) != SUCCESS) | |
2735 | { | |
2736 | return FAILED; | |
2737 | } | |
2738 | current = out; | |
2739 | while (NLMSG_OK(current, len)) | |
2740 | { | |
2741 | switch (current->nlmsg_type) | |
2742 | { | |
2743 | case NLMSG_DONE: | |
2744 | break; | |
2745 | case RTM_NEWLINK: | |
2746 | process_link(this, current, FALSE); | |
2747 | /* fall through */ | |
2748 | default: | |
2749 | current = NLMSG_NEXT(current, len); | |
2750 | continue; | |
2751 | } | |
2752 | break; | |
2753 | } | |
2754 | free(out); | |
7daf5226 | 2755 | |
507f26f6 TB |
2756 | /* get all interface addresses */ |
2757 | in->nlmsg_type = RTM_GETADDR; | |
2758 | if (this->socket->send(this->socket, in, &out, &len) != SUCCESS) | |
2759 | { | |
2760 | return FAILED; | |
2761 | } | |
2762 | current = out; | |
2763 | while (NLMSG_OK(current, len)) | |
2764 | { | |
2765 | switch (current->nlmsg_type) | |
2766 | { | |
2767 | case NLMSG_DONE: | |
2768 | break; | |
2769 | case RTM_NEWADDR: | |
2770 | process_addr(this, current, FALSE); | |
2771 | /* fall through */ | |
2772 | default: | |
2773 | current = NLMSG_NEXT(current, len); | |
2774 | continue; | |
2775 | } | |
2776 | break; | |
2777 | } | |
2778 | free(out); | |
7daf5226 | 2779 | |
a25d536e | 2780 | this->lock->read_lock(this->lock); |
e13389a7 MW |
2781 | ifaces = this->ifaces->create_enumerator(this->ifaces); |
2782 | while (ifaces->enumerate(ifaces, &iface)) | |
507f26f6 | 2783 | { |
940e1b0f | 2784 | if (iface_entry_up_and_usable(iface)) |
507f26f6 | 2785 | { |
31a0e24b | 2786 | DBG2(DBG_KNL, " %s", iface->ifname); |
e13389a7 MW |
2787 | addrs = iface->addrs->create_enumerator(iface->addrs); |
2788 | while (addrs->enumerate(addrs, (void**)&addr)) | |
507f26f6 | 2789 | { |
31a0e24b | 2790 | DBG2(DBG_KNL, " %H", addr->ip); |
507f26f6 TB |
2791 | } |
2792 | addrs->destroy(addrs); | |
2793 | } | |
2794 | } | |
2795 | ifaces->destroy(ifaces); | |
a25d536e | 2796 | this->lock->unlock(this->lock); |
507f26f6 TB |
2797 | return SUCCESS; |
2798 | } | |
2799 | ||
2800 | /** | |
2801 | * create or delete a rule to use our routing table | |
2802 | */ | |
2803 | static status_t manage_rule(private_kernel_netlink_net_t *this, int nlmsg_type, | |
b12c53ce | 2804 | int family, uint32_t table, uint32_t prio) |
507f26f6 | 2805 | { |
21bf86f7 | 2806 | netlink_buf_t request; |
507f26f6 TB |
2807 | struct nlmsghdr *hdr; |
2808 | struct rtmsg *msg; | |
2809 | chunk_t chunk; | |
51fefe46 | 2810 | char *fwmark; |
507f26f6 | 2811 | |
7daf5226 | 2812 | memset(&request, 0, sizeof(request)); |
0404a29b | 2813 | hdr = &request.hdr; |
507f26f6 | 2814 | hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK; |
7daf5226 | 2815 | hdr->nlmsg_type = nlmsg_type; |
507f26f6 TB |
2816 | if (nlmsg_type == RTM_NEWRULE) |
2817 | { | |
2818 | hdr->nlmsg_flags |= NLM_F_CREATE | NLM_F_EXCL; | |
2819 | } | |
2820 | hdr->nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)); | |
2821 | ||
4c438cf0 | 2822 | msg = NLMSG_DATA(hdr); |
507f26f6 | 2823 | msg->rtm_table = table; |
5be75c2c | 2824 | msg->rtm_family = family; |
507f26f6 TB |
2825 | msg->rtm_protocol = RTPROT_BOOT; |
2826 | msg->rtm_scope = RT_SCOPE_UNIVERSE; | |
2827 | msg->rtm_type = RTN_UNICAST; | |
2828 | ||
2829 | chunk = chunk_from_thing(prio); | |
2830 | netlink_add_attribute(hdr, RTA_PRIORITY, chunk, sizeof(request)); | |
2831 | ||
51fefe46 | 2832 | fwmark = lib->settings->get_str(lib->settings, |
d347a130 | 2833 | "%s.plugins.kernel-netlink.fwmark", NULL, lib->ns); |
51fefe46 TB |
2834 | if (fwmark) |
2835 | { | |
8e8e97d1 TB |
2836 | #ifdef HAVE_LINUX_FIB_RULES_H |
2837 | mark_t mark; | |
2838 | ||
51fefe46 TB |
2839 | if (fwmark[0] == '!') |
2840 | { | |
2841 | msg->rtm_flags |= FIB_RULE_INVERT; | |
2842 | fwmark++; | |
2843 | } | |
2844 | if (mark_from_string(fwmark, &mark)) | |
2845 | { | |
2846 | chunk = chunk_from_thing(mark.value); | |
2847 | netlink_add_attribute(hdr, FRA_FWMARK, chunk, sizeof(request)); | |
2848 | chunk = chunk_from_thing(mark.mask); | |
2849 | netlink_add_attribute(hdr, FRA_FWMASK, chunk, sizeof(request)); | |
6bd1216e TB |
2850 | if (msg->rtm_flags & FIB_RULE_INVERT) |
2851 | { | |
2852 | this->routing_mark = mark; | |
2853 | } | |
51fefe46 | 2854 | } |
8e8e97d1 TB |
2855 | #else |
2856 | DBG1(DBG_KNL, "setting firewall mark on routing rule is not supported"); | |
2857 | #endif | |
51fefe46 | 2858 | } |
507f26f6 TB |
2859 | return this->socket->send_ack(this->socket, hdr); |
2860 | } | |
2861 | ||
7beb31aa TB |
2862 | /** |
2863 | * check for kernel features (currently only via version number) | |
2864 | */ | |
2865 | static void check_kernel_features(private_kernel_netlink_net_t *this) | |
2866 | { | |
2867 | struct utsname utsname; | |
2868 | int a, b, c; | |
2869 | ||
2870 | if (uname(&utsname) == 0) | |
2871 | { | |
2872 | switch(sscanf(utsname.release, "%d.%d.%d", &a, &b, &c)) | |
2873 | { | |
2874 | case 3: | |
2875 | if (a == 2) | |
2876 | { | |
6bd1216e TB |
2877 | if (b == 6 && c >= 36) |
2878 | { | |
2879 | this->rta_mark = TRUE; | |
2880 | } | |
7beb31aa TB |
2881 | DBG2(DBG_KNL, "detected Linux %d.%d.%d, no support for " |
2882 | "RTA_PREFSRC for IPv6 routes", a, b, c); | |
2883 | break; | |
2884 | } | |
2885 | /* fall-through */ | |
2886 | case 2: | |
2887 | /* only 3.x+ uses two part version numbers */ | |
2888 | this->rta_prefsrc_for_ipv6 = TRUE; | |
6bd1216e | 2889 | this->rta_mark = TRUE; |
7beb31aa TB |
2890 | break; |
2891 | default: | |
2892 | break; | |
2893 | } | |
2894 | } | |
2895 | } | |
2896 | ||
c6b40158 TB |
2897 | /** |
2898 | * Destroy an address to iface map | |
2899 | */ | |
2900 | static void addr_map_destroy(hashtable_t *map) | |
2901 | { | |
2902 | enumerator_t *enumerator; | |
2903 | addr_map_entry_t *addr; | |
2904 | ||
2905 | enumerator = map->create_enumerator(map); | |
2906 | while (enumerator->enumerate(enumerator, NULL, (void**)&addr)) | |
2907 | { | |
2908 | free(addr); | |
2909 | } | |
2910 | enumerator->destroy(enumerator); | |
2911 | map->destroy(map); | |
2912 | } | |
2913 | ||
887abfb1 MW |
2914 | METHOD(kernel_net_t, destroy, void, |
2915 | private_kernel_netlink_net_t *this) | |
507f26f6 | 2916 | { |
74ba22c9 TB |
2917 | enumerator_t *enumerator; |
2918 | route_entry_t *route; | |
2919 | ||
507f26f6 TB |
2920 | if (this->routing_table) |
2921 | { | |
5be75c2c MW |
2922 | manage_rule(this, RTM_DELRULE, AF_INET, this->routing_table, |
2923 | this->routing_table_prio); | |
2924 | manage_rule(this, RTM_DELRULE, AF_INET6, this->routing_table, | |
507f26f6 TB |
2925 | this->routing_table_prio); |
2926 | } | |
d6a27ec6 MW |
2927 | if (this->socket_events > 0) |
2928 | { | |
f4f77d74 | 2929 | lib->watcher->remove(lib->watcher, this->socket_events); |
d6a27ec6 MW |
2930 | close(this->socket_events); |
2931 | } | |
74ba22c9 TB |
2932 | enumerator = this->routes->create_enumerator(this->routes); |
2933 | while (enumerator->enumerate(enumerator, NULL, (void**)&route)) | |
2934 | { | |
2935 | manage_srcroute(this, RTM_DELROUTE, 0, route->dst_net, route->prefixlen, | |
2936 | route->gateway, route->src_ip, route->if_name); | |
2937 | route_entry_destroy(route); | |
2938 | } | |
2939 | enumerator->destroy(enumerator); | |
2940 | this->routes->destroy(this->routes); | |
16d62305 | 2941 | this->routes_lock->destroy(this->routes_lock); |
9e19cb91 | 2942 | DESTROY_IF(this->socket); |
74ba22c9 | 2943 | |
f834249c TB |
2944 | net_changes_clear(this); |
2945 | this->net_changes->destroy(this->net_changes); | |
2946 | this->net_changes_lock->destroy(this->net_changes_lock); | |
2947 | ||
c6b40158 TB |
2948 | addr_map_destroy(this->addrs); |
2949 | addr_map_destroy(this->vips); | |
1f97e1aa | 2950 | |
507f26f6 | 2951 | this->ifaces->destroy_function(this->ifaces, (void*)iface_entry_destroy); |
d266e895 | 2952 | this->rt_exclude->destroy(this->rt_exclude); |
4134108c | 2953 | this->roam_lock->destroy(this->roam_lock); |
3ac5a0db | 2954 | this->condvar->destroy(this->condvar); |
a25d536e | 2955 | this->lock->destroy(this->lock); |
507f26f6 TB |
2956 | free(this); |
2957 | } | |
2958 | ||
2959 | /* | |
2960 | * Described in header. | |
2961 | */ | |
2962 | kernel_netlink_net_t *kernel_netlink_net_create() | |
2963 | { | |
887abfb1 | 2964 | private_kernel_netlink_net_t *this; |
d266e895 | 2965 | enumerator_t *enumerator; |
05ca5655 | 2966 | bool register_for_events = TRUE; |
d266e895 | 2967 | char *exclude; |
7daf5226 | 2968 | |
887abfb1 MW |
2969 | INIT(this, |
2970 | .public = { | |
2971 | .interface = { | |
2972 | .get_interface = _get_interface_name, | |
2973 | .create_address_enumerator = _create_address_enumerator, | |
eac584a3 | 2974 | .create_local_subnet_enumerator = _create_local_subnet_enumerator, |
887abfb1 MW |
2975 | .get_source_addr = _get_source_addr, |
2976 | .get_nexthop = _get_nexthop, | |
2977 | .add_ip = _add_ip, | |
2978 | .del_ip = _del_ip, | |
2979 | .add_route = _add_route, | |
2980 | .del_route = _del_route, | |
2981 | .destroy = _destroy, | |
2982 | }, | |
2983 | }, | |
6c58fabe MW |
2984 | .socket = netlink_socket_create(NETLINK_ROUTE, rt_msg_names, |
2985 | lib->settings->get_bool(lib->settings, | |
2986 | "%s.plugins.kernel-netlink.parallel_route", FALSE, lib->ns)), | |
887abfb1 | 2987 | .rt_exclude = linked_list_create(), |
74ba22c9 TB |
2988 | .routes = hashtable_create((hashtable_hash_t)route_entry_hash, |
2989 | (hashtable_equals_t)route_entry_equals, 16), | |
f834249c TB |
2990 | .net_changes = hashtable_create( |
2991 | (hashtable_hash_t)net_change_hash, | |
2992 | (hashtable_equals_t)net_change_equals, 16), | |
1f97e1aa TB |
2993 | .addrs = hashtable_create( |
2994 | (hashtable_hash_t)addr_map_entry_hash, | |
2995 | (hashtable_equals_t)addr_map_entry_equals, 16), | |
c6b40158 TB |
2996 | .vips = hashtable_create((hashtable_hash_t)addr_map_entry_hash, |
2997 | (hashtable_equals_t)addr_map_entry_equals, 16), | |
16d62305 | 2998 | .routes_lock = mutex_create(MUTEX_TYPE_DEFAULT), |
f834249c | 2999 | .net_changes_lock = mutex_create(MUTEX_TYPE_DEFAULT), |
887abfb1 | 3000 | .ifaces = linked_list_create(), |
a25d536e TB |
3001 | .lock = rwlock_create(RWLOCK_TYPE_DEFAULT), |
3002 | .condvar = rwlock_condvar_create(), | |
4134108c | 3003 | .roam_lock = spinlock_create(), |
887abfb1 | 3004 | .routing_table = lib->settings->get_int(lib->settings, |
d347a130 | 3005 | "%s.routing_table", ROUTING_TABLE, lib->ns), |
887abfb1 | 3006 | .routing_table_prio = lib->settings->get_int(lib->settings, |
d347a130 | 3007 | "%s.routing_table_prio", ROUTING_TABLE_PRIO, lib->ns), |
887abfb1 | 3008 | .process_route = lib->settings->get_bool(lib->settings, |
d347a130 | 3009 | "%s.process_route", TRUE, lib->ns), |
558691b3 MW |
3010 | .install_routes = lib->settings->get_bool(lib->settings, |
3011 | "%s.install_routes", TRUE, lib->ns), | |
887abfb1 | 3012 | .install_virtual_ip = lib->settings->get_bool(lib->settings, |
d347a130 | 3013 | "%s.install_virtual_ip", TRUE, lib->ns), |
e8e9048f | 3014 | .install_virtual_ip_on = lib->settings->get_str(lib->settings, |
d347a130 | 3015 | "%s.install_virtual_ip_on", NULL, lib->ns), |
3bf98189 TB |
3016 | .prefer_temporary_addrs = lib->settings->get_bool(lib->settings, |
3017 | "%s.prefer_temporary_addrs", FALSE, lib->ns), | |
37873f99 | 3018 | .roam_events = lib->settings->get_bool(lib->settings, |
d347a130 | 3019 | "%s.plugins.kernel-netlink.roam_events", TRUE, lib->ns), |
4664992f TB |
3020 | .process_rules = lib->settings->get_bool(lib->settings, |
3021 | "%s.plugins.kernel-netlink.process_rules", FALSE, lib->ns), | |
c1adf7e0 TB |
3022 | .mtu = lib->settings->get_int(lib->settings, |
3023 | "%s.plugins.kernel-netlink.mtu", 0, lib->ns), | |
47a0e289 TB |
3024 | .mss = lib->settings->get_int(lib->settings, |
3025 | "%s.plugins.kernel-netlink.mss", 0, lib->ns), | |
887abfb1 | 3026 | ); |
f834249c | 3027 | timerclear(&this->last_route_reinstall); |
4134108c | 3028 | timerclear(&this->next_roam); |
887abfb1 | 3029 | |
7beb31aa TB |
3030 | check_kernel_features(this); |
3031 | ||
d347a130 | 3032 | if (streq(lib->ns, "starter")) |
05ca5655 TB |
3033 | { /* starter has no threads, so we do not register for kernel events */ |
3034 | register_for_events = FALSE; | |
3035 | } | |
3036 | ||
d266e895 | 3037 | exclude = lib->settings->get_str(lib->settings, |
d347a130 | 3038 | "%s.ignore_routing_tables", NULL, lib->ns); |
d266e895 TE |
3039 | if (exclude) |
3040 | { | |
3041 | char *token; | |
3042 | uintptr_t table; | |
3043 | ||
3044 | enumerator = enumerator_create_token(exclude, " ", " "); | |
3045 | while (enumerator->enumerate(enumerator, &token)) | |
3046 | { | |
3047 | errno = 0; | |
3048 | table = strtoul(token, NULL, 10); | |
3049 | ||
3050 | if (errno == 0) | |
3051 | { | |
3052 | this->rt_exclude->insert_last(this->rt_exclude, (void*)table); | |
3053 | } | |
3054 | } | |
3055 | enumerator->destroy(enumerator); | |
3056 | } | |
3057 | ||
05ca5655 | 3058 | if (register_for_events) |
507f26f6 | 3059 | { |
05ca5655 TB |
3060 | struct sockaddr_nl addr; |
3061 | ||
3062 | memset(&addr, 0, sizeof(addr)); | |
3063 | addr.nl_family = AF_NETLINK; | |
7daf5226 | 3064 | |
05ca5655 TB |
3065 | /* create and bind RT socket for events (address/interface/route changes) */ |
3066 | this->socket_events = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE); | |
3067 | if (this->socket_events < 0) | |
3068 | { | |
a0178fe2 TB |
3069 | DBG1(DBG_KNL, "unable to create RT event socket: %s (%d)", |
3070 | strerror(errno), errno); | |
05ca5655 TB |
3071 | destroy(this); |
3072 | return NULL; | |
3073 | } | |
4664992f TB |
3074 | addr.nl_groups = nl_group(RTNLGRP_IPV4_IFADDR) | |
3075 | nl_group(RTNLGRP_IPV6_IFADDR) | | |
3076 | nl_group(RTNLGRP_LINK); | |
3077 | if (this->process_route) | |
3078 | { | |
3079 | addr.nl_groups |= nl_group(RTNLGRP_IPV4_ROUTE) | | |
3080 | nl_group(RTNLGRP_IPV6_ROUTE); | |
3081 | } | |
3082 | if (this->process_rules) | |
3083 | { | |
3084 | addr.nl_groups |= nl_group(RTNLGRP_IPV4_RULE) | | |
3085 | nl_group(RTNLGRP_IPV6_RULE); | |
3086 | } | |
05ca5655 TB |
3087 | if (bind(this->socket_events, (struct sockaddr*)&addr, sizeof(addr))) |
3088 | { | |
a0178fe2 TB |
3089 | DBG1(DBG_KNL, "unable to bind RT event socket: %s (%d)", |
3090 | strerror(errno), errno); | |
05ca5655 TB |
3091 | destroy(this); |
3092 | return NULL; | |
3093 | } | |
3094 | ||
f4f77d74 MW |
3095 | lib->watcher->add(lib->watcher, this->socket_events, WATCHER_READ, |
3096 | (watcher_cb_t)receive_events, this); | |
05ca5655 | 3097 | } |
7daf5226 | 3098 | |
507f26f6 TB |
3099 | if (init_address_list(this) != SUCCESS) |
3100 | { | |
d6a27ec6 MW |
3101 | DBG1(DBG_KNL, "unable to get interface list"); |
3102 | destroy(this); | |
3103 | return NULL; | |
507f26f6 | 3104 | } |
7daf5226 | 3105 | |
507f26f6 TB |
3106 | if (this->routing_table) |
3107 | { | |
5be75c2c MW |
3108 | if (manage_rule(this, RTM_NEWRULE, AF_INET, this->routing_table, |
3109 | this->routing_table_prio) != SUCCESS) | |
3110 | { | |
3111 | DBG1(DBG_KNL, "unable to create IPv4 routing table rule"); | |
3112 | } | |
3113 | if (manage_rule(this, RTM_NEWRULE, AF_INET6, this->routing_table, | |
507f26f6 TB |
3114 | this->routing_table_prio) != SUCCESS) |
3115 | { | |
5be75c2c | 3116 | DBG1(DBG_KNL, "unable to create IPv6 routing table rule"); |
507f26f6 TB |
3117 | } |
3118 | } | |
7daf5226 | 3119 | |
507f26f6 TB |
3120 | return &this->public; |
3121 | } |