Added options and a lookup function that will allow filtering of network interfaces
[strongswan.git] / src / libhydra / kernel / kernel_interface.c
1 /*
2 * Copyright (C) 2008-2012 Tobias Brunner
3 * Hochschule fuer Technik Rapperswil
4 * Copyright (C) 2010 Martin Willi
5 * Copyright (C) 2010 revosec AG
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2 of the License, or (at your
10 * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
11 *
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
14 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
15 * for more details.
16 */
17
18 /*
19 * Copyright (c) 2012 Nanoteq Pty Ltd
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
40 #include "kernel_interface.h"
41
42 #include <hydra.h>
43 #include <debug.h>
44 #include <threading/mutex.h>
45 #include <utils/linked_list.h>
46
47 typedef struct private_kernel_interface_t private_kernel_interface_t;
48
49 typedef struct kernel_algorithm_t kernel_algorithm_t;
50
51 /**
52 * Mapping of IKE algorithms to kernel-specific algorithm identifiers
53 */
54 struct kernel_algorithm_t {
55
56 /**
57 * Transform type of the algorithm
58 */
59 transform_type_t type;
60
61 /**
62 * Identifier specified in IKE
63 */
64 u_int16_t ike;
65
66 /**
67 * Identifier as defined in pfkeyv2.h
68 */
69 u_int16_t kernel;
70
71 /**
72 * Name of the algorithm in linux crypto API
73 */
74 char *name;
75 };
76
77 /**
78 * Private data of a kernel_interface_t object.
79 */
80 struct private_kernel_interface_t {
81
82 /**
83 * Public part of kernel_interface_t object.
84 */
85 kernel_interface_t public;
86
87 /**
88 * Registered IPsec constructor
89 */
90 kernel_ipsec_constructor_t ipsec_constructor;
91
92 /**
93 * Registered net constructor
94 */
95 kernel_net_constructor_t net_constructor;
96
97 /**
98 * ipsec interface
99 */
100 kernel_ipsec_t *ipsec;
101
102 /**
103 * network interface
104 */
105 kernel_net_t *net;
106
107 /**
108 * mutex for listeners
109 */
110 mutex_t *mutex;
111
112 /**
113 * list of registered listeners
114 */
115 linked_list_t *listeners;
116
117 /**
118 * mutex for algorithm mappings
119 */
120 mutex_t *mutex_algs;
121
122 /**
123 * List of algorithm mappings (kernel_algorithm_t*)
124 */
125 linked_list_t *algorithms;
126
127 /**
128 * List of interface names to include or exclude (char*), NULL if interfaces
129 * are not filtered
130 */
131 linked_list_t *ifaces_filter;
132
133 /**
134 * TRUE to exclude interfaces listed in ifaces_filter, FALSE to consider
135 * only those listed there
136 */
137 bool ifaces_exclude;
138 };
139
140 METHOD(kernel_interface_t, get_spi, status_t,
141 private_kernel_interface_t *this, host_t *src, host_t *dst,
142 u_int8_t protocol, u_int32_t reqid, u_int32_t *spi)
143 {
144 if (!this->ipsec)
145 {
146 return NOT_SUPPORTED;
147 }
148 return this->ipsec->get_spi(this->ipsec, src, dst, protocol, reqid, spi);
149 }
150
151 METHOD(kernel_interface_t, get_cpi, status_t,
152 private_kernel_interface_t *this, host_t *src, host_t *dst,
153 u_int32_t reqid, u_int16_t *cpi)
154 {
155 if (!this->ipsec)
156 {
157 return NOT_SUPPORTED;
158 }
159 return this->ipsec->get_cpi(this->ipsec, src, dst, reqid, cpi);
160 }
161
162 METHOD(kernel_interface_t, add_sa, status_t,
163 private_kernel_interface_t *this, host_t *src, host_t *dst,
164 u_int32_t spi, u_int8_t protocol, u_int32_t reqid, mark_t mark,
165 u_int32_t tfc, lifetime_cfg_t *lifetime, u_int16_t enc_alg, chunk_t enc_key,
166 u_int16_t int_alg, chunk_t int_key, ipsec_mode_t mode, u_int16_t ipcomp,
167 u_int16_t cpi, bool encap, bool esn, bool inbound,
168 traffic_selector_t *src_ts, traffic_selector_t *dst_ts)
169 {
170 if (!this->ipsec)
171 {
172 return NOT_SUPPORTED;
173 }
174 return this->ipsec->add_sa(this->ipsec, src, dst, spi, protocol, reqid,
175 mark, tfc, lifetime, enc_alg, enc_key, int_alg, int_key, mode,
176 ipcomp, cpi, encap, esn, inbound, src_ts, dst_ts);
177 }
178
179 METHOD(kernel_interface_t, update_sa, status_t,
180 private_kernel_interface_t *this, u_int32_t spi, u_int8_t protocol,
181 u_int16_t cpi, host_t *src, host_t *dst, host_t *new_src, host_t *new_dst,
182 bool encap, bool new_encap, mark_t mark)
183 {
184 if (!this->ipsec)
185 {
186 return NOT_SUPPORTED;
187 }
188 return this->ipsec->update_sa(this->ipsec, spi, protocol, cpi, src, dst,
189 new_src, new_dst, encap, new_encap, mark);
190 }
191
192 METHOD(kernel_interface_t, query_sa, status_t,
193 private_kernel_interface_t *this, host_t *src, host_t *dst,
194 u_int32_t spi, u_int8_t protocol, mark_t mark, u_int64_t *bytes)
195 {
196 if (!this->ipsec)
197 {
198 return NOT_SUPPORTED;
199 }
200 return this->ipsec->query_sa(this->ipsec, src, dst, spi, protocol, mark, bytes);
201 }
202
203 METHOD(kernel_interface_t, del_sa, status_t,
204 private_kernel_interface_t *this, host_t *src, host_t *dst, u_int32_t spi,
205 u_int8_t protocol, u_int16_t cpi, mark_t mark)
206 {
207 if (!this->ipsec)
208 {
209 return NOT_SUPPORTED;
210 }
211 return this->ipsec->del_sa(this->ipsec, src, dst, spi, protocol, cpi, mark);
212 }
213
214 METHOD(kernel_interface_t, flush_sas, status_t,
215 private_kernel_interface_t *this)
216 {
217 if (!this->ipsec)
218 {
219 return NOT_SUPPORTED;
220 }
221 return this->ipsec->flush_sas(this->ipsec);
222 }
223
224 METHOD(kernel_interface_t, add_policy, status_t,
225 private_kernel_interface_t *this, host_t *src, host_t *dst,
226 traffic_selector_t *src_ts, traffic_selector_t *dst_ts,
227 policy_dir_t direction, policy_type_t type, ipsec_sa_cfg_t *sa,
228 mark_t mark, policy_priority_t priority)
229 {
230 if (!this->ipsec)
231 {
232 return NOT_SUPPORTED;
233 }
234 return this->ipsec->add_policy(this->ipsec, src, dst, src_ts, dst_ts,
235 direction, type, sa, mark, priority);
236 }
237
238 METHOD(kernel_interface_t, query_policy, status_t,
239 private_kernel_interface_t *this, traffic_selector_t *src_ts,
240 traffic_selector_t *dst_ts, policy_dir_t direction, mark_t mark,
241 u_int32_t *use_time)
242 {
243 if (!this->ipsec)
244 {
245 return NOT_SUPPORTED;
246 }
247 return this->ipsec->query_policy(this->ipsec, src_ts, dst_ts,
248 direction, mark, use_time);
249 }
250
251 METHOD(kernel_interface_t, del_policy, status_t,
252 private_kernel_interface_t *this, traffic_selector_t *src_ts,
253 traffic_selector_t *dst_ts, policy_dir_t direction, u_int32_t reqid,
254 mark_t mark, policy_priority_t priority)
255 {
256 if (!this->ipsec)
257 {
258 return NOT_SUPPORTED;
259 }
260 return this->ipsec->del_policy(this->ipsec, src_ts, dst_ts,
261 direction, reqid, mark, priority);
262 }
263
264 METHOD(kernel_interface_t, flush_policies, status_t,
265 private_kernel_interface_t *this)
266 {
267 if (!this->ipsec)
268 {
269 return NOT_SUPPORTED;
270 }
271 return this->ipsec->flush_policies(this->ipsec);
272 }
273
274 METHOD(kernel_interface_t, get_source_addr, host_t*,
275 private_kernel_interface_t *this, host_t *dest, host_t *src)
276 {
277 if (!this->net)
278 {
279 return NULL;
280 }
281 return this->net->get_source_addr(this->net, dest, src);
282 }
283
284 METHOD(kernel_interface_t, get_nexthop, host_t*,
285 private_kernel_interface_t *this, host_t *dest, host_t *src)
286 {
287 if (!this->net)
288 {
289 return NULL;
290 }
291 return this->net->get_nexthop(this->net, dest, src);
292 }
293
294 METHOD(kernel_interface_t, get_interface, char*,
295 private_kernel_interface_t *this, host_t *host)
296 {
297 if (!this->net)
298 {
299 return NULL;
300 }
301 return this->net->get_interface(this->net, host);
302 }
303
304 METHOD(kernel_interface_t, create_address_enumerator, enumerator_t*,
305 private_kernel_interface_t *this, bool include_down_ifaces,
306 bool include_virtual_ips)
307 {
308 if (!this->net)
309 {
310 return enumerator_create_empty();
311 }
312 return this->net->create_address_enumerator(this->net, include_down_ifaces,
313 include_virtual_ips);
314 }
315
316 METHOD(kernel_interface_t, add_ip, status_t,
317 private_kernel_interface_t *this, host_t *virtual_ip, host_t *iface_ip)
318 {
319 if (!this->net)
320 {
321 return NOT_SUPPORTED;
322 }
323 return this->net->add_ip(this->net, virtual_ip, iface_ip);
324 }
325
326 METHOD(kernel_interface_t, del_ip, status_t,
327 private_kernel_interface_t *this, host_t *virtual_ip)
328 {
329 if (!this->net)
330 {
331 return NOT_SUPPORTED;
332 }
333 return this->net->del_ip(this->net, virtual_ip);
334 }
335
336 METHOD(kernel_interface_t, add_route, status_t,
337 private_kernel_interface_t *this, chunk_t dst_net,
338 u_int8_t prefixlen, host_t *gateway, host_t *src_ip, char *if_name)
339 {
340 if (!this->net)
341 {
342 return NOT_SUPPORTED;
343 }
344 return this->net->add_route(this->net, dst_net, prefixlen, gateway,
345 src_ip, if_name);
346 }
347
348 METHOD(kernel_interface_t, del_route, status_t,
349 private_kernel_interface_t *this, chunk_t dst_net,
350 u_int8_t prefixlen, host_t *gateway, host_t *src_ip, char *if_name)
351 {
352 if (!this->net)
353 {
354 return NOT_SUPPORTED;
355 }
356 return this->net->del_route(this->net, dst_net, prefixlen, gateway,
357 src_ip, if_name);
358 }
359
360 METHOD(kernel_interface_t, bypass_socket, bool,
361 private_kernel_interface_t *this, int fd, int family)
362 {
363 if (!this->ipsec)
364 {
365 return FALSE;
366 }
367 return this->ipsec->bypass_socket(this->ipsec, fd, family);
368 }
369
370 METHOD(kernel_interface_t, enable_udp_decap, bool,
371 private_kernel_interface_t *this, int fd, int family, u_int16_t port)
372 {
373 if (!this->ipsec)
374 {
375 return FALSE;
376 }
377 return this->ipsec->enable_udp_decap(this->ipsec, fd, family, port);
378 }
379
380 METHOD(kernel_interface_t, is_interface_usable, bool,
381 private_kernel_interface_t *this, const char *iface)
382 {
383 status_t expected;
384
385 if (!this->ifaces_filter)
386 {
387 return TRUE;
388 }
389 expected = this->ifaces_exclude ? NOT_FOUND : SUCCESS;
390 return this->ifaces_filter->find_first(this->ifaces_filter, (void*)streq,
391 NULL, iface) == expected;
392 }
393
394 METHOD(kernel_interface_t, get_address_by_ts, status_t,
395 private_kernel_interface_t *this, traffic_selector_t *ts, host_t **ip)
396 {
397 enumerator_t *addrs;
398 host_t *host;
399 int family;
400 bool found = FALSE;
401
402 DBG2(DBG_KNL, "getting a local address in traffic selector %R", ts);
403
404 /* if we have a family which includes localhost, we do not
405 * search for an IP, we use the default */
406 family = ts->get_type(ts) == TS_IPV4_ADDR_RANGE ? AF_INET : AF_INET6;
407
408 if (family == AF_INET)
409 {
410 host = host_create_from_string("127.0.0.1", 0);
411 }
412 else
413 {
414 host = host_create_from_string("::1", 0);
415 }
416
417 if (ts->includes(ts, host))
418 {
419 *ip = host_create_any(family);
420 host->destroy(host);
421 DBG2(DBG_KNL, "using host %H", *ip);
422 return SUCCESS;
423 }
424 host->destroy(host);
425
426 addrs = create_address_enumerator(this, TRUE, TRUE);
427 while (addrs->enumerate(addrs, (void**)&host))
428 {
429 if (ts->includes(ts, host))
430 {
431 found = TRUE;
432 *ip = host->clone(host);
433 break;
434 }
435 }
436 addrs->destroy(addrs);
437
438 if (!found)
439 {
440 DBG2(DBG_KNL, "no local address found in traffic selector %R", ts);
441 return FAILED;
442 }
443
444 DBG2(DBG_KNL, "using host %H", *ip);
445 return SUCCESS;
446 }
447
448
449 METHOD(kernel_interface_t, add_ipsec_interface, void,
450 private_kernel_interface_t *this, kernel_ipsec_constructor_t constructor)
451 {
452 if (!this->ipsec)
453 {
454 this->ipsec_constructor = constructor;
455 this->ipsec = constructor();
456 }
457 }
458
459 METHOD(kernel_interface_t, remove_ipsec_interface, void,
460 private_kernel_interface_t *this, kernel_ipsec_constructor_t constructor)
461 {
462 if (constructor == this->ipsec_constructor && this->ipsec)
463 {
464 this->ipsec->destroy(this->ipsec);
465 this->ipsec = NULL;
466 }
467 }
468
469 METHOD(kernel_interface_t, add_net_interface, void,
470 private_kernel_interface_t *this, kernel_net_constructor_t constructor)
471 {
472 if (!this->net)
473 {
474 this->net_constructor = constructor;
475 this->net = constructor();
476 }
477 }
478
479 METHOD(kernel_interface_t, remove_net_interface, void,
480 private_kernel_interface_t *this, kernel_net_constructor_t constructor)
481 {
482 if (constructor == this->net_constructor && this->net)
483 {
484 this->net->destroy(this->net);
485 this->net = NULL;
486 }
487 }
488
489 METHOD(kernel_interface_t, add_listener, void,
490 private_kernel_interface_t *this, kernel_listener_t *listener)
491 {
492 this->mutex->lock(this->mutex);
493 this->listeners->insert_last(this->listeners, listener);
494 this->mutex->unlock(this->mutex);
495 }
496
497 METHOD(kernel_interface_t, remove_listener, void,
498 private_kernel_interface_t *this, kernel_listener_t *listener)
499 {
500 this->mutex->lock(this->mutex);
501 this->listeners->remove(this->listeners, listener, NULL);
502 this->mutex->unlock(this->mutex);
503 }
504
505 METHOD(kernel_interface_t, acquire, void,
506 private_kernel_interface_t *this, u_int32_t reqid,
507 traffic_selector_t *src_ts, traffic_selector_t *dst_ts)
508 {
509 kernel_listener_t *listener;
510 enumerator_t *enumerator;
511 this->mutex->lock(this->mutex);
512 enumerator = this->listeners->create_enumerator(this->listeners);
513 while (enumerator->enumerate(enumerator, &listener))
514 {
515 if (listener->acquire &&
516 !listener->acquire(listener, reqid, src_ts, dst_ts))
517 {
518 this->listeners->remove_at(this->listeners, enumerator);
519 }
520 }
521 enumerator->destroy(enumerator);
522 this->mutex->unlock(this->mutex);
523 }
524
525 METHOD(kernel_interface_t, expire, void,
526 private_kernel_interface_t *this, u_int32_t reqid, u_int8_t protocol,
527 u_int32_t spi, bool hard)
528 {
529 kernel_listener_t *listener;
530 enumerator_t *enumerator;
531 this->mutex->lock(this->mutex);
532 enumerator = this->listeners->create_enumerator(this->listeners);
533 while (enumerator->enumerate(enumerator, &listener))
534 {
535 if (listener->expire &&
536 !listener->expire(listener, reqid, protocol, spi, hard))
537 {
538 this->listeners->remove_at(this->listeners, enumerator);
539 }
540 }
541 enumerator->destroy(enumerator);
542 this->mutex->unlock(this->mutex);
543 }
544
545 METHOD(kernel_interface_t, mapping, void,
546 private_kernel_interface_t *this, u_int32_t reqid, u_int32_t spi,
547 host_t *remote)
548 {
549 kernel_listener_t *listener;
550 enumerator_t *enumerator;
551 this->mutex->lock(this->mutex);
552 enumerator = this->listeners->create_enumerator(this->listeners);
553 while (enumerator->enumerate(enumerator, &listener))
554 {
555 if (listener->mapping &&
556 !listener->mapping(listener, reqid, spi, remote))
557 {
558 this->listeners->remove_at(this->listeners, enumerator);
559 }
560 }
561 enumerator->destroy(enumerator);
562 this->mutex->unlock(this->mutex);
563 }
564
565 METHOD(kernel_interface_t, migrate, void,
566 private_kernel_interface_t *this, u_int32_t reqid,
567 traffic_selector_t *src_ts, traffic_selector_t *dst_ts,
568 policy_dir_t direction, host_t *local, host_t *remote)
569 {
570 kernel_listener_t *listener;
571 enumerator_t *enumerator;
572 this->mutex->lock(this->mutex);
573 enumerator = this->listeners->create_enumerator(this->listeners);
574 while (enumerator->enumerate(enumerator, &listener))
575 {
576 if (listener->migrate &&
577 !listener->migrate(listener, reqid, src_ts, dst_ts, direction,
578 local, remote))
579 {
580 this->listeners->remove_at(this->listeners, enumerator);
581 }
582 }
583 enumerator->destroy(enumerator);
584 this->mutex->unlock(this->mutex);
585 }
586
587 static bool call_roam(kernel_listener_t *listener, bool *roam)
588 {
589 return listener->roam && !listener->roam(listener, *roam);
590 }
591
592 METHOD(kernel_interface_t, roam, void,
593 private_kernel_interface_t *this, bool address)
594 {
595 this->mutex->lock(this->mutex);
596 this->listeners->remove(this->listeners, &address, (void*)call_roam);
597 this->mutex->unlock(this->mutex);
598 }
599
600 METHOD(kernel_interface_t, register_algorithm, void,
601 private_kernel_interface_t *this, u_int16_t alg_id, transform_type_t type,
602 u_int16_t kernel_id, char *kernel_name)
603 {
604 kernel_algorithm_t *algorithm;
605
606 INIT(algorithm,
607 .type = type,
608 .ike = alg_id,
609 .kernel = kernel_id,
610 .name = strdup(kernel_name),
611 );
612
613 this->mutex_algs->lock(this->mutex_algs);
614 this->algorithms->insert_first(this->algorithms, algorithm);
615 this->mutex_algs->unlock(this->mutex_algs);
616 }
617
618 METHOD(kernel_interface_t, lookup_algorithm, bool,
619 private_kernel_interface_t *this, u_int16_t alg_id, transform_type_t type,
620 u_int16_t *kernel_id, char **kernel_name)
621 {
622 kernel_algorithm_t *algorithm;
623 enumerator_t *enumerator;
624 bool found = FALSE;
625
626 this->mutex_algs->lock(this->mutex_algs);
627 enumerator = this->algorithms->create_enumerator(this->algorithms);
628 while (enumerator->enumerate(enumerator, &algorithm))
629 {
630 if (algorithm->type == type && algorithm->ike == alg_id)
631 {
632 if (kernel_id)
633 {
634 *kernel_id = algorithm->kernel;
635 }
636 if (kernel_name)
637 {
638 *kernel_name = algorithm->name;
639 }
640 found = TRUE;
641 break;
642 }
643 }
644 enumerator->destroy(enumerator);
645 this->mutex_algs->unlock(this->mutex_algs);
646 return found;
647 }
648
649 METHOD(kernel_interface_t, destroy, void,
650 private_kernel_interface_t *this)
651 {
652 kernel_algorithm_t *algorithm;
653
654 while (this->algorithms->remove_first(this->algorithms,
655 (void**)&algorithm) == SUCCESS)
656 {
657 free(algorithm->name);
658 free(algorithm);
659 }
660 this->algorithms->destroy(this->algorithms);
661 this->mutex_algs->destroy(this->mutex_algs);
662 DESTROY_IF(this->ipsec);
663 DESTROY_IF(this->net);
664 DESTROY_FUNCTION_IF(this->ifaces_filter, (void*)free);
665 this->listeners->destroy(this->listeners);
666 this->mutex->destroy(this->mutex);
667 free(this);
668 }
669
670 /*
671 * Described in header-file
672 */
673 kernel_interface_t *kernel_interface_create()
674 {
675 private_kernel_interface_t *this;
676 char *ifaces;
677
678 INIT(this,
679 .public = {
680 .get_spi = _get_spi,
681 .get_cpi = _get_cpi,
682 .add_sa = _add_sa,
683 .update_sa = _update_sa,
684 .query_sa = _query_sa,
685 .del_sa = _del_sa,
686 .flush_sas = _flush_sas,
687 .add_policy = _add_policy,
688 .query_policy = _query_policy,
689 .del_policy = _del_policy,
690 .flush_policies = _flush_policies,
691 .get_source_addr = _get_source_addr,
692 .get_nexthop = _get_nexthop,
693 .get_interface = _get_interface,
694 .create_address_enumerator = _create_address_enumerator,
695 .add_ip = _add_ip,
696 .del_ip = _del_ip,
697 .add_route = _add_route,
698 .del_route = _del_route,
699 .bypass_socket = _bypass_socket,
700 .enable_udp_decap = _enable_udp_decap,
701
702 .is_interface_usable = _is_interface_usable,
703 .get_address_by_ts = _get_address_by_ts,
704 .add_ipsec_interface = _add_ipsec_interface,
705 .remove_ipsec_interface = _remove_ipsec_interface,
706 .add_net_interface = _add_net_interface,
707 .remove_net_interface = _remove_net_interface,
708
709 .add_listener = _add_listener,
710 .remove_listener = _remove_listener,
711 .register_algorithm = _register_algorithm,
712 .lookup_algorithm = _lookup_algorithm,
713 .acquire = _acquire,
714 .expire = _expire,
715 .mapping = _mapping,
716 .migrate = _migrate,
717 .roam = _roam,
718 .destroy = _destroy,
719 },
720 .mutex = mutex_create(MUTEX_TYPE_DEFAULT),
721 .listeners = linked_list_create(),
722 .mutex_algs = mutex_create(MUTEX_TYPE_DEFAULT),
723 .algorithms = linked_list_create(),
724 );
725
726 ifaces = lib->settings->get_str(lib->settings,
727 "%s.interfaces_use", NULL, hydra->daemon);
728 if (!ifaces)
729 {
730 ifaces = lib->settings->get_str(lib->settings,
731 "%s.interfaces_ignore", NULL, hydra->daemon);
732 if (ifaces)
733 {
734 this->ifaces_exclude = TRUE;
735 }
736 }
737 if (ifaces)
738 {
739 enumerator_t *enumerator;
740 char *iface;
741
742 enumerator = enumerator_create_token(ifaces, ",", " ");
743 while (enumerator->enumerate(enumerator, &iface))
744 {
745 if (!this->ifaces_filter)
746 {
747 this->ifaces_filter = linked_list_create();
748 }
749 this->ifaces_filter->insert_last(this->ifaces_filter,
750 strdup(iface));
751 }
752 enumerator->destroy(enumerator);
753 }
754
755 return &this->public;
756 }
757