Replaced more complex iterator usages.
[strongswan.git] / src / libcharon / sa / connect_manager.c
1 /*
2 * Copyright (C) 2007-2008 Tobias Brunner
3 * Hochschule fuer Technik Rapperswil
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License as published by the
7 * Free Software Foundation; either version 2 of the License, or (at your
8 * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
12 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * for more details.
14 */
15
16 #include "connect_manager.h"
17
18 #include <math.h>
19
20 #include <daemon.h>
21 #include <threading/mutex.h>
22 #include <utils/linked_list.h>
23 #include <crypto/hashers/hasher.h>
24
25 #include <processing/jobs/callback_job.h>
26 #include <processing/jobs/initiate_mediation_job.h>
27 #include <encoding/payloads/endpoint_notify.h>
28
29 /* base timeout
30 * the check interval is ME_INTERVAL */
31 #define ME_INTERVAL 25 /* ms */
32 /* retransmission timeout is first ME_INTERVAL for ME_BOOST retransmissions
33 * then gets reduced to ME_INTERVAL * ME_RETRANS_BASE ^ (sent retransmissions - ME_BOOST). */
34 /* number of initial retransmissions sent in short interval */
35 #define ME_BOOST 2
36 /* base for retransmissions */
37 #define ME_RETRANS_BASE 1.8
38 /* max number of retransmissions */
39 #define ME_MAX_RETRANS 13
40
41 /* time to wait before the initiator finishes the connectivity checks after
42 * the first check has succeeded */
43 #define ME_WAIT_TO_FINISH 1000 /* ms */
44
45 typedef struct private_connect_manager_t private_connect_manager_t;
46
47 /**
48 * Additional private members of connect_manager_t.
49 */
50 struct private_connect_manager_t {
51 /**
52 * Public interface of connect_manager_t.
53 */
54 connect_manager_t public;
55
56 /**
57 * Lock for exclusivly accessing the manager.
58 */
59 mutex_t *mutex;
60
61 /**
62 * Hasher to generate signatures
63 */
64 hasher_t *hasher;
65
66 /**
67 * Linked list with initiated mediated connections
68 */
69 linked_list_t *initiated;
70
71 /**
72 * Linked list with checklists (hash table with connect ID as key would
73 * be better).
74 */
75 linked_list_t *checklists;
76 };
77
78 typedef enum check_state_t check_state_t;
79
80 enum check_state_t {
81 CHECK_NONE,
82 CHECK_WAITING,
83 CHECK_IN_PROGRESS,
84 CHECK_SUCCEEDED,
85 CHECK_FAILED
86 };
87
88 typedef struct endpoint_pair_t endpoint_pair_t;
89
90 /**
91 * An entry in the check list.
92 */
93 struct endpoint_pair_t {
94 /** pair id */
95 u_int32_t id;
96
97 /** priority */
98 u_int64_t priority;
99
100 /** local endpoint */
101 host_t *local;
102
103 /** remote endpoint */
104 host_t *remote;
105
106 /** state */
107 check_state_t state;
108
109 /** number of retransmissions */
110 u_int32_t retransmitted;
111
112 /** the generated packet */
113 packet_t *packet;
114 };
115
116 /**
117 * Destroys an endpoint pair
118 */
119 static void endpoint_pair_destroy(endpoint_pair_t *this)
120 {
121 DESTROY_IF(this->local);
122 DESTROY_IF(this->remote);
123 DESTROY_IF(this->packet);
124 free(this);
125 }
126
127 /**
128 * Creates a new entry for the list.
129 */
130 static endpoint_pair_t *endpoint_pair_create(endpoint_notify_t *initiator,
131 endpoint_notify_t *responder, bool initiator_is_local)
132 {
133 endpoint_pair_t *this = malloc_thing(endpoint_pair_t);
134
135 this->id = 0;
136
137 u_int32_t pi = initiator->get_priority(initiator);
138 u_int32_t pr = responder->get_priority(responder);
139 this->priority = pow(2, 32) * min(pi, pr) + 2 * max(pi, pr) + (pi > pr ? 1 : 0);
140
141 this->local = initiator_is_local ? initiator->get_base(initiator)
142 : responder->get_base(responder);
143 this->local = this->local->clone(this->local);
144 this->remote = initiator_is_local ? responder->get_host(responder)
145 : initiator->get_host(initiator);
146 this->remote = this->remote->clone(this->remote);
147
148 this->state = CHECK_WAITING;
149 this->retransmitted = 0;
150 this->packet = NULL;
151
152 return this;
153 }
154
155
156 typedef struct check_list_t check_list_t;
157
158 /**
159 * An entry in the linked list.
160 */
161 struct check_list_t {
162
163 struct {
164 /** initiator's id */
165 identification_t *id;
166
167 /** initiator's key */
168 chunk_t key;
169
170 /** initiator's endpoints */
171 linked_list_t *endpoints;
172 } initiator;
173
174 struct {
175 /** responder's id */
176 identification_t *id;
177
178 /** responder's key */
179 chunk_t key;
180
181 /** responder's endpoints */
182 linked_list_t *endpoints;
183 } responder;
184
185 /** connect id */
186 chunk_t connect_id;
187
188 /** list of endpoint pairs */
189 linked_list_t *pairs;
190
191 /** pairs queued for triggered checks */
192 linked_list_t *triggered;
193
194 /** state */
195 check_state_t state;
196
197 /** TRUE if this is the initiator */
198 bool is_initiator;
199
200 /** TRUE if the initiator is finishing the checks */
201 bool is_finishing;
202
203 /** the current sender job */
204 job_t *sender;
205
206 };
207
208 /**
209 * Destroys a checklist
210 */
211 static void check_list_destroy(check_list_t *this)
212 {
213 DESTROY_IF(this->initiator.id);
214 DESTROY_IF(this->responder.id);
215
216 chunk_free(&this->connect_id);
217 chunk_free(&this->initiator.key);
218 chunk_free(&this->responder.key);
219
220 DESTROY_OFFSET_IF(this->initiator.endpoints,
221 offsetof(endpoint_notify_t, destroy));
222 DESTROY_OFFSET_IF(this->responder.endpoints,
223 offsetof(endpoint_notify_t, destroy));
224
225 DESTROY_FUNCTION_IF(this->pairs, (void*)endpoint_pair_destroy);
226 /* this list contains some of the elements contained in this->pairs */
227 DESTROY_IF(this->triggered);
228
229 free(this);
230 }
231
232 /**
233 * Creates a new checklist
234 */
235 static check_list_t *check_list_create(identification_t *initiator,
236 identification_t *responder,
237 chunk_t connect_id,
238 chunk_t initiator_key,
239 linked_list_t *initiator_endpoints,
240 bool is_initiator)
241 {
242 check_list_t *this = malloc_thing(check_list_t);
243
244 this->connect_id = chunk_clone(connect_id);
245
246 this->initiator.id = initiator->clone(initiator);
247 this->initiator.key = chunk_clone(initiator_key);
248 this->initiator.endpoints = initiator_endpoints->clone_offset(initiator_endpoints, offsetof(endpoint_notify_t, clone));
249
250 this->responder.id = responder->clone(responder);
251 this->responder.key = chunk_empty;
252 this->responder.endpoints = NULL;
253
254 this->pairs = linked_list_create();
255 this->triggered = linked_list_create();
256 this->state = CHECK_NONE;
257 this->is_initiator = is_initiator;
258 this->is_finishing = FALSE;
259
260 return this;
261 }
262
263 typedef struct initiated_t initiated_t;
264
265 /**
266 * For an initiator, the data stored about initiated mediation connections
267 */
268 struct initiated_t {
269 /** my id */
270 identification_t *id;
271
272 /** peer id */
273 identification_t *peer_id;
274
275 /** list of mediated sas */
276 linked_list_t *mediated;
277 };
278
279 /**
280 * Destroys a queued initiation
281 */
282 static void initiated_destroy(initiated_t *this)
283 {
284 DESTROY_IF(this->id);
285 DESTROY_IF(this->peer_id);
286 this->mediated->destroy_offset(this->mediated,
287 offsetof(ike_sa_id_t, destroy));
288 free(this);
289 }
290
291 /**
292 * Creates a queued initiation
293 */
294 static initiated_t *initiated_create(identification_t *id,
295 identification_t *peer_id)
296 {
297 initiated_t *this = malloc_thing(initiated_t);
298
299 this->id = id->clone(id);
300 this->peer_id = peer_id->clone(peer_id);
301 this->mediated = linked_list_create();
302
303 return this;
304 }
305
306
307 typedef struct check_t check_t;
308
309 /**
310 * Data exchanged in a connectivity check
311 */
312 struct check_t {
313 /** message id */
314 u_int32_t mid;
315
316 /** source of the connectivity check */
317 host_t *src;
318
319 /** destination of the connectivity check */
320 host_t *dst;
321
322 /** connect id */
323 chunk_t connect_id;
324
325 /** endpoint */
326 endpoint_notify_t *endpoint;
327
328 /** raw endpoint payload (to verify the signature) */
329 chunk_t endpoint_raw;
330
331 /** connect auth */
332 chunk_t auth;
333 };
334
335 /**
336 * Destroys a connectivity check
337 */
338 static void check_destroy(check_t *this)
339 {
340 chunk_free(&this->connect_id);
341 chunk_free(&this->endpoint_raw);
342 chunk_free(&this->auth);
343 DESTROY_IF(this->src);
344 DESTROY_IF(this->dst);
345 DESTROY_IF(this->endpoint);
346 free(this);
347 }
348
349 /**
350 * Creates a new connectivity check
351 */
352 static check_t *check_create()
353 {
354 check_t *this = malloc_thing(check_t);
355
356 this->connect_id = chunk_empty;
357 this->auth = chunk_empty;
358 this->endpoint_raw = chunk_empty;
359 this->src = NULL;
360 this->dst = NULL;
361 this->endpoint = NULL;
362
363 this->mid = 0;
364
365 return this;
366 }
367
368 typedef struct callback_data_t callback_data_t;
369
370 /**
371 * Data required by several callback jobs used in this file
372 */
373 struct callback_data_t {
374 /** connect manager */
375 private_connect_manager_t *connect_manager;
376
377 /** connect id */
378 chunk_t connect_id;
379
380 /** message (pair) id */
381 u_int32_t mid;
382 };
383
384 /**
385 * Destroys a callback data object
386 */
387 static void callback_data_destroy(callback_data_t *this)
388 {
389 chunk_free(&this->connect_id);
390 free(this);
391 }
392
393 /**
394 * Creates a new callback data object
395 */
396 static callback_data_t *callback_data_create(private_connect_manager_t *connect_manager,
397 chunk_t connect_id)
398 {
399 callback_data_t *this = malloc_thing(callback_data_t);
400 this->connect_manager = connect_manager;
401 this->connect_id = chunk_clone(connect_id);
402 this->mid = 0;
403 return this;
404 }
405
406 /**
407 * Creates a new retransmission data object
408 */
409 static callback_data_t *retransmit_data_create(private_connect_manager_t *connect_manager,
410 chunk_t connect_id, u_int32_t mid)
411 {
412 callback_data_t *this = callback_data_create(connect_manager, connect_id);
413 this->mid = mid;
414 return this;
415 }
416
417 typedef struct initiate_data_t initiate_data_t;
418
419 /**
420 * Data required by the initiate mediated
421 */
422 struct initiate_data_t {
423 /** checklist */
424 check_list_t *checklist;
425
426 /** waiting mediated connections */
427 initiated_t *initiated;
428 };
429
430 /**
431 * Destroys a initiate data object
432 */
433 static void initiate_data_destroy(initiate_data_t *this)
434 {
435 check_list_destroy(this->checklist);
436 initiated_destroy(this->initiated);
437 free(this);
438 }
439
440 /**
441 * Creates a new initiate data object
442 */
443 static initiate_data_t *initiate_data_create(check_list_t *checklist,
444 initiated_t *initiated)
445 {
446 initiate_data_t *this = malloc_thing(initiate_data_t);
447
448 this->checklist = checklist;
449 this->initiated = initiated;
450
451 return this;
452 }
453
454 /**
455 * Find an initiated connection by the peers' ids
456 */
457 static bool match_initiated_by_ids(initiated_t *current, identification_t *id,
458 identification_t *peer_id)
459 {
460 return id->equals(id, current->id) && peer_id->equals(peer_id, current->peer_id);
461 }
462
463 static status_t get_initiated_by_ids(private_connect_manager_t *this,
464 identification_t *id,
465 identification_t *peer_id,
466 initiated_t **initiated)
467 {
468 return this->initiated->find_first(this->initiated,
469 (linked_list_match_t)match_initiated_by_ids,
470 (void**)initiated, id, peer_id);
471 }
472
473 /**
474 * Removes data about initiated connections
475 */
476 static void remove_initiated(private_connect_manager_t *this,
477 initiated_t *initiated)
478 {
479 enumerator_t *enumerator;
480 initiated_t *current;
481
482 enumerator = this->initiated->create_enumerator(this->initiated);
483 while (enumerator->enumerate(enumerator, (void**)&current))
484 {
485 if (current == initiated)
486 {
487 this->initiated->remove_at(this->initiated, enumerator);
488 break;
489 }
490 }
491 enumerator->destroy(enumerator);
492 }
493
494 /**
495 * Find the checklist with a specific connect ID
496 */
497 static bool match_checklist_by_id(check_list_t *current, chunk_t *connect_id)
498 {
499 return chunk_equals(*connect_id, current->connect_id);
500 }
501
502 static status_t get_checklist_by_id(private_connect_manager_t *this,
503 chunk_t connect_id,
504 check_list_t **check_list)
505 {
506 return this->checklists->find_first(this->checklists,
507 (linked_list_match_t)match_checklist_by_id,
508 (void**)check_list, &connect_id);
509 }
510
511 /**
512 * Removes a checklist
513 */
514 static void remove_checklist(private_connect_manager_t *this,
515 check_list_t *checklist)
516 {
517 enumerator_t *enumerator;
518 check_list_t *current;
519
520 enumerator = this->checklists->create_enumerator(this->checklists);
521 while (enumerator->enumerate(enumerator, (void**)&current))
522 {
523 if (current == checklist)
524 {
525 this->checklists->remove_at(this->checklists, enumerator);
526 break;
527 }
528 }
529 enumerator->destroy(enumerator);
530 }
531
532 /**
533 * Checks if a list of endpoint_notify_t contains a certain host_t
534 */
535 static bool match_endpoint_by_host(endpoint_notify_t *current, host_t *host)
536 {
537 return host->equals(host, current->get_host(current));
538 }
539
540 static status_t endpoints_contain(linked_list_t *endpoints, host_t *host,
541 endpoint_notify_t **endpoint)
542 {
543 return endpoints->find_first(endpoints,
544 (linked_list_match_t)match_endpoint_by_host,
545 (void**)endpoint, host);
546 }
547
548 /**
549 * Inserts an endpoint pair into a list of pairs ordered by priority (high to low)
550 */
551 static void insert_pair_by_priority(linked_list_t *pairs, endpoint_pair_t *pair)
552 {
553 enumerator_t *enumerator = pairs->create_enumerator(pairs);
554 endpoint_pair_t *current;
555 while (enumerator->enumerate(enumerator, (void**)&current) &&
556 current->priority >= pair->priority)
557 {
558 continue;
559 }
560 pairs->insert_before(pairs, enumerator, pair);
561 enumerator->destroy(enumerator);
562 }
563
564 /**
565 * Searches a list of endpoint_pair_t for a pair with specific host_ts
566 */
567 static bool match_pair_by_hosts(endpoint_pair_t *current, host_t *local,
568 host_t *remote)
569 {
570 return local->equals(local, current->local) && remote->equals(remote, current->remote);
571 }
572
573 static status_t get_pair_by_hosts(linked_list_t *pairs, host_t *local,
574 host_t *remote, endpoint_pair_t **pair)
575 {
576 return pairs->find_first(pairs, (linked_list_match_t)match_pair_by_hosts,
577 (void**)pair, local, remote);
578 }
579
580 static bool match_pair_by_id(endpoint_pair_t *current, u_int32_t *id)
581 {
582 return current->id == *id;
583 }
584
585 /**
586 * Searches for a pair with a specific id
587 */
588 static status_t get_pair_by_id(check_list_t *checklist, u_int32_t id,
589 endpoint_pair_t **pair)
590 {
591 return checklist->pairs->find_first(checklist->pairs,
592 (linked_list_match_t)match_pair_by_id,
593 (void**)pair, &id);
594 }
595
596 static bool match_succeeded_pair(endpoint_pair_t *current)
597 {
598 return current->state == CHECK_SUCCEEDED;
599 }
600
601 /**
602 * Returns the best pair of state CHECK_SUCCEEDED from a checklist.
603 */
604 static status_t get_best_valid_pair(check_list_t *checklist,
605 endpoint_pair_t **pair)
606 {
607 return checklist->pairs->find_first(checklist->pairs,
608 (linked_list_match_t)match_succeeded_pair,
609 (void**)pair);
610 }
611
612 static bool match_waiting_pair(endpoint_pair_t *current)
613 {
614 return current->state == CHECK_WAITING;
615 }
616
617 /**
618 * Returns and *removes* the first triggered pair in state CHECK_WAITING.
619 */
620 static status_t get_triggered_pair(check_list_t *checklist,
621 endpoint_pair_t **pair)
622 {
623 enumerator_t *enumerator;
624 endpoint_pair_t *current;
625 status_t status = NOT_FOUND;
626
627 enumerator = checklist->triggered->create_enumerator(checklist->triggered);
628 while (enumerator->enumerate(enumerator, (void**)&current))
629 {
630 checklist->triggered->remove_at(checklist->triggered, enumerator);
631
632 if (current->state == CHECK_WAITING)
633 {
634 if (pair)
635 {
636 *pair = current;
637 }
638 status = SUCCESS;
639 break;
640 }
641 }
642 enumerator->destroy(enumerator);
643
644 return status;
645 }
646
647 /**
648 * Prints all the pairs on a checklist
649 */
650 static void print_checklist(check_list_t *checklist)
651 {
652 enumerator_t *enumerator;
653 endpoint_pair_t *current;
654
655 DBG1(DBG_IKE, "pairs on checklist %#B:", &checklist->connect_id);
656 enumerator = checklist->pairs->create_enumerator(checklist->pairs);
657 while (enumerator->enumerate(enumerator, (void**)&current))
658 {
659 DBG1(DBG_IKE, " * %#H - %#H (%d)", current->local, current->remote,
660 current->priority);
661 }
662 enumerator->destroy(enumerator);
663 }
664
665 /**
666 * Prunes identical pairs with lower priority from the list
667 * Note: this function also numbers the remaining pairs serially
668 */
669 static void prune_pairs(linked_list_t *pairs)
670 {
671 enumerator_t *enumerator, *search;
672 endpoint_pair_t *current, *other;
673 u_int32_t id = 0;
674
675 enumerator = pairs->create_enumerator(pairs);
676 search = pairs->create_enumerator(pairs);
677 while (enumerator->enumerate(enumerator, (void**)&current))
678 {
679 current->id = ++id;
680
681 while (search->enumerate(search, (void**)&other))
682 {
683 if (current == other)
684 {
685 continue;
686 }
687
688 if (current->local->equals(current->local, other->local) &&
689 current->remote->equals(current->remote, other->remote))
690 {
691 /* since the list of pairs is sorted by priority in descending
692 * order, and we iterate the list from the beginning, we are
693 * sure that the priority of 'other' is lower than that of
694 * 'current', remove it */
695 DBG1(DBG_IKE, "pruning endpoint pair %#H - %#H with priority %d",
696 other->local, other->remote, other->priority);
697 pairs->remove_at(pairs, search);
698 endpoint_pair_destroy(other);
699 }
700 }
701 pairs->reset_enumerator(pairs, search);
702 }
703 search->destroy(search);
704 enumerator->destroy(enumerator);
705 }
706
707 /**
708 * Builds a list of endpoint pairs
709 */
710 static void build_pairs(check_list_t *checklist)
711 {
712 /* FIXME: limit endpoints and pairs */
713 enumerator_t *enumerator_i, *enumerator_r;
714 endpoint_notify_t *initiator, *responder;
715
716 enumerator_i = checklist->initiator.endpoints->create_enumerator(
717 checklist->initiator.endpoints);
718 while (enumerator_i->enumerate(enumerator_i, (void**)&initiator))
719 {
720 enumerator_r = checklist->responder.endpoints->create_enumerator(
721 checklist->responder.endpoints);
722 while (enumerator_r->enumerate(enumerator_r, (void**)&responder))
723 {
724 if (initiator->get_family(initiator) != responder->get_family(responder))
725 {
726 continue;
727 }
728
729 insert_pair_by_priority(checklist->pairs, endpoint_pair_create(
730 initiator, responder, checklist->is_initiator));
731 }
732 enumerator_r->destroy(enumerator_r);
733 }
734 enumerator_i->destroy(enumerator_i);
735
736 print_checklist(checklist);
737
738 prune_pairs(checklist->pairs);
739 }
740
741 /**
742 * Processes the payloads of a connectivity check and returns the extracted data
743 */
744 static status_t process_payloads(message_t *message, check_t *check)
745 {
746 enumerator_t *enumerator;
747 payload_t *payload;
748
749 enumerator = message->create_payload_enumerator(message);
750 while (enumerator->enumerate(enumerator, &payload))
751 {
752 if (payload->get_type(payload) != NOTIFY)
753 {
754 DBG1(DBG_IKE, "ignoring payload of type '%N' while processing "
755 "connectivity check", payload_type_names,
756 payload->get_type(payload));
757 continue;
758 }
759
760 notify_payload_t *notify = (notify_payload_t*)payload;
761
762 switch (notify->get_notify_type(notify))
763 {
764 case ME_ENDPOINT:
765 {
766 if (check->endpoint)
767 {
768 DBG1(DBG_IKE, "connectivity check contains multiple "
769 "ME_ENDPOINT notifies");
770 break;
771 }
772
773 endpoint_notify_t *endpoint = endpoint_notify_create_from_payload(notify);
774 if (!endpoint)
775 {
776 DBG1(DBG_IKE, "received invalid ME_ENDPOINT notify");
777 break;
778 }
779 check->endpoint = endpoint;
780 check->endpoint_raw = chunk_clone(notify->get_notification_data(notify));
781 DBG2(DBG_IKE, "received ME_ENDPOINT notify");
782 break;
783 }
784 case ME_CONNECTID:
785 {
786 if (check->connect_id.ptr)
787 {
788 DBG1(DBG_IKE, "connectivity check contains multiple "
789 "ME_CONNECTID notifies");
790 break;
791 }
792 check->connect_id = chunk_clone(notify->get_notification_data(notify));
793 DBG2(DBG_IKE, "received ME_CONNECTID %#B", &check->connect_id);
794 break;
795 }
796 case ME_CONNECTAUTH:
797 {
798 if (check->auth.ptr)
799 {
800 DBG1(DBG_IKE, "connectivity check contains multiple "
801 "ME_CONNECTAUTH notifies");
802 break;
803 }
804 check->auth = chunk_clone(notify->get_notification_data(notify));
805 DBG2(DBG_IKE, "received ME_CONNECTAUTH %#B", &check->auth);
806 break;
807 }
808 default:
809 break;
810 }
811 }
812 enumerator->destroy(enumerator);
813
814 if (!check->connect_id.ptr || !check->endpoint || !check->auth.ptr)
815 {
816 DBG1(DBG_IKE, "at least one required payload was missing from the "
817 "connectivity check");
818 return FAILED;
819 }
820
821 return SUCCESS;
822 }
823
824 /**
825 * Builds the signature for a connectivity check
826 */
827 static chunk_t build_signature(private_connect_manager_t *this,
828 check_list_t *checklist, check_t *check, bool outbound)
829 {
830 u_int32_t mid;
831 chunk_t mid_chunk, key_chunk, sig_chunk;
832 chunk_t sig_hash;
833
834 mid = htonl(check->mid);
835 mid_chunk = chunk_from_thing(mid);
836
837 key_chunk = (checklist->is_initiator && outbound) || (!checklist->is_initiator && !outbound)
838 ? checklist->initiator.key : checklist->responder.key;
839
840 /* signature = SHA1( MID | ME_CONNECTID | ME_ENDPOINT | ME_CONNECTKEY ) */
841 sig_chunk = chunk_cat("cccc", mid_chunk, check->connect_id,
842 check->endpoint_raw, key_chunk);
843 this->hasher->allocate_hash(this->hasher, sig_chunk, &sig_hash);
844 DBG3(DBG_IKE, "sig_chunk %#B", &sig_chunk);
845 DBG3(DBG_IKE, "sig_hash %#B", &sig_hash);
846
847 chunk_free(&sig_chunk);
848 return sig_hash;
849 }
850
851 static void queue_retransmission(private_connect_manager_t *this, check_list_t *checklist, endpoint_pair_t *pair);
852 static void schedule_checks(private_connect_manager_t *this, check_list_t *checklist, u_int32_t time);
853 static void finish_checks(private_connect_manager_t *this, check_list_t *checklist);
854
855 /**
856 * After one of the initiator's pairs has succeeded we finish the checks without
857 * waiting for all the timeouts
858 */
859 static job_requeue_t initiator_finish(callback_data_t *data)
860 {
861 private_connect_manager_t *this = data->connect_manager;
862
863 this->mutex->lock(this->mutex);
864
865 check_list_t *checklist;
866 if (get_checklist_by_id(this, data->connect_id, &checklist) != SUCCESS)
867 {
868 DBG1(DBG_IKE, "checklist with id '%#B' not found, can't finish "
869 "connectivity checks", &data->connect_id);
870 this->mutex->unlock(this->mutex);
871 return JOB_REQUEUE_NONE;
872 }
873
874 finish_checks(this, checklist);
875
876 this->mutex->unlock(this->mutex);
877
878 return JOB_REQUEUE_NONE;
879 }
880
881 /**
882 * Updates the state of the whole checklist
883 */
884 static void update_checklist_state(private_connect_manager_t *this,
885 check_list_t *checklist)
886 {
887 enumerator_t *enumerator;
888 endpoint_pair_t *current;
889 bool in_progress = FALSE, succeeded = FALSE;
890
891 enumerator = checklist->pairs->create_enumerator(checklist->pairs);
892 while (enumerator->enumerate(enumerator, (void**)&current))
893 {
894 switch(current->state)
895 {
896 case CHECK_WAITING:
897 /* at least one is still waiting -> checklist remains
898 * in waiting state */
899 enumerator->destroy(enumerator);
900 return;
901 case CHECK_IN_PROGRESS:
902 in_progress = TRUE;
903 break;
904 case CHECK_SUCCEEDED:
905 succeeded = TRUE;
906 break;
907 default:
908 break;
909 }
910 }
911 enumerator->destroy(enumerator);
912
913 if (checklist->is_initiator && succeeded && !checklist->is_finishing)
914 {
915 /* instead of waiting until all checks have finished (i.e. all
916 * retransmissions have failed) the initiator finishes the checks
917 * right after the first check has succeeded. to allow a probably
918 * better pair to succeed, we still wait a certain time */
919 DBG2(DBG_IKE, "fast finishing checks for checklist '%#B'",
920 &checklist->connect_id);
921
922 callback_data_t *data = callback_data_create(this, checklist->connect_id);
923 job_t *job = (job_t*)callback_job_create((callback_job_cb_t)initiator_finish, data, (callback_job_cleanup_t)callback_data_destroy, NULL);
924 lib->scheduler->schedule_job_ms(lib->scheduler, job, ME_WAIT_TO_FINISH);
925 checklist->is_finishing = TRUE;
926 }
927
928 if (in_progress)
929 {
930 checklist->state = CHECK_IN_PROGRESS;
931 }
932 else if (succeeded)
933 {
934 checklist->state = CHECK_SUCCEEDED;
935 }
936 else
937 {
938 checklist->state = CHECK_FAILED;
939 }
940 }
941
942 /**
943 * This function is triggered for each sent check after a specific timeout
944 */
945 static job_requeue_t retransmit(callback_data_t *data)
946 {
947 private_connect_manager_t *this = data->connect_manager;
948
949 this->mutex->lock(this->mutex);
950
951 check_list_t *checklist;
952 if (get_checklist_by_id(this, data->connect_id, &checklist) != SUCCESS)
953 {
954 DBG1(DBG_IKE, "checklist with id '%#B' not found, can't retransmit "
955 "connectivity check", &data->connect_id);
956 this->mutex->unlock(this->mutex);
957 return JOB_REQUEUE_NONE;
958 }
959
960 endpoint_pair_t *pair;
961 if (get_pair_by_id(checklist, data->mid, &pair) != SUCCESS)
962 {
963 DBG1(DBG_IKE, "pair with id '%d' not found, can't retransmit "
964 "connectivity check", data->mid);
965 goto retransmit_end;
966 }
967
968 if (pair->state != CHECK_IN_PROGRESS)
969 {
970 DBG2(DBG_IKE, "pair with id '%d' is in wrong state [%d], don't "
971 "retransmit the connectivity check", data->mid, pair->state);
972 goto retransmit_end;
973 }
974
975 if (++pair->retransmitted > ME_MAX_RETRANS)
976 {
977 DBG2(DBG_IKE, "pair with id '%d' failed after %d retransmissions",
978 data->mid, ME_MAX_RETRANS);
979 pair->state = CHECK_FAILED;
980 goto retransmit_end;
981 }
982
983 charon->sender->send(charon->sender, pair->packet->clone(pair->packet));
984
985 queue_retransmission(this, checklist, pair);
986
987 retransmit_end:
988 update_checklist_state(this, checklist);
989
990 switch(checklist->state)
991 {
992 case CHECK_SUCCEEDED:
993 case CHECK_FAILED:
994 finish_checks(this, checklist);
995 break;
996 default:
997 break;
998 }
999
1000 this->mutex->unlock(this->mutex);
1001
1002 /* we reschedule it manually */
1003 return JOB_REQUEUE_NONE;
1004 }
1005
1006 /**
1007 * Queues a retransmission job
1008 */
1009 static void queue_retransmission(private_connect_manager_t *this, check_list_t *checklist, endpoint_pair_t *pair)
1010 {
1011 callback_data_t *data = retransmit_data_create(this, checklist->connect_id, pair->id);
1012 job_t *job = (job_t*)callback_job_create((callback_job_cb_t)retransmit, data, (callback_job_cleanup_t)callback_data_destroy, NULL);
1013
1014 u_int32_t retransmission = pair->retransmitted + 1;
1015 u_int32_t rto = ME_INTERVAL;
1016 if (retransmission > ME_BOOST)
1017 {
1018 rto = (u_int32_t)(ME_INTERVAL * pow(ME_RETRANS_BASE, retransmission - ME_BOOST));
1019 }
1020 DBG2(DBG_IKE, "scheduling retransmission %d of pair '%d' in %dms",
1021 retransmission, pair->id, rto);
1022
1023 lib->scheduler->schedule_job_ms(lib->scheduler, (job_t*)job, rto);
1024 }
1025
1026 /**
1027 * Sends a check
1028 */
1029 static void send_check(private_connect_manager_t *this, check_list_t *checklist,
1030 check_t *check, endpoint_pair_t *pair, bool request)
1031 {
1032 message_t *message = message_create();
1033 message->set_message_id(message, check->mid);
1034 message->set_exchange_type(message, INFORMATIONAL);
1035 message->set_request(message, request);
1036 message->set_destination(message, check->dst->clone(check->dst));
1037 message->set_source(message, check->src->clone(check->src));
1038
1039 ike_sa_id_t *ike_sa_id = ike_sa_id_create(0, 0, request);
1040 message->set_ike_sa_id(message, ike_sa_id);
1041 ike_sa_id->destroy(ike_sa_id);
1042
1043 message->add_notify(message, FALSE, ME_CONNECTID, check->connect_id);
1044 DBG2(DBG_IKE, "send ME_CONNECTID %#B", &check->connect_id);
1045
1046 notify_payload_t *endpoint = check->endpoint->build_notify(check->endpoint);
1047 check->endpoint_raw = chunk_clone(endpoint->get_notification_data(endpoint));
1048 message->add_payload(message, (payload_t*)endpoint);
1049 DBG2(DBG_IKE, "send ME_ENDPOINT notify");
1050
1051 check->auth = build_signature(this, checklist, check, TRUE);
1052 message->add_notify(message, FALSE, ME_CONNECTAUTH, check->auth);
1053 DBG2(DBG_IKE, "send ME_CONNECTAUTH %#B", &check->auth);
1054
1055 packet_t *packet;
1056 if (message->generate(message, NULL, &packet) == SUCCESS)
1057 {
1058 charon->sender->send(charon->sender, packet->clone(packet));
1059
1060 if (request)
1061 {
1062 DESTROY_IF(pair->packet);
1063 pair->packet = packet;
1064 pair->retransmitted = 0;
1065 queue_retransmission(this, checklist, pair);
1066 }
1067 else
1068 {
1069 packet->destroy(packet);
1070 }
1071 }
1072 message->destroy(message);
1073 }
1074
1075 /**
1076 * Queues a triggered check
1077 */
1078 static void queue_triggered_check(private_connect_manager_t *this,
1079 check_list_t *checklist, endpoint_pair_t *pair)
1080 {
1081 DBG2(DBG_IKE, "queueing triggered check for pair '%d'", pair->id);
1082 pair->state = CHECK_WAITING;
1083 checklist->triggered->insert_last(checklist->triggered, pair);
1084
1085 if (!checklist->sender)
1086 {
1087 /* if the sender is not running we restart it */
1088 schedule_checks(this, checklist, ME_INTERVAL);
1089 }
1090 }
1091
1092 /**
1093 * This function is triggered for each checklist at a specific interval
1094 */
1095 static job_requeue_t sender(callback_data_t *data)
1096 {
1097 private_connect_manager_t *this = data->connect_manager;
1098
1099 this->mutex->lock(this->mutex);
1100
1101 check_list_t *checklist;
1102 if (get_checklist_by_id(this, data->connect_id, &checklist) != SUCCESS)
1103 {
1104 DBG1(DBG_IKE, "checklist with id '%#B' not found, can't send "
1105 "connectivity check", &data->connect_id);
1106 this->mutex->unlock(this->mutex);
1107 return JOB_REQUEUE_NONE;
1108 }
1109
1110 /* reset the sender */
1111 checklist->sender = NULL;
1112
1113 endpoint_pair_t *pair;
1114 if (get_triggered_pair(checklist, &pair) != SUCCESS)
1115 {
1116 DBG1(DBG_IKE, "no triggered check queued, sending an ordinary check");
1117
1118 if (checklist->pairs->find_first(checklist->pairs,
1119 (linked_list_match_t)match_waiting_pair,
1120 (void**)&pair) != SUCCESS)
1121 {
1122 this->mutex->unlock(this->mutex);
1123 DBG1(DBG_IKE, "no pairs in waiting state, aborting");
1124 return JOB_REQUEUE_NONE;
1125 }
1126 }
1127 else
1128 {
1129 DBG1(DBG_IKE, "triggered check found");
1130 }
1131
1132 check_t *check = check_create();
1133 check->mid = pair->id;
1134 check->src = pair->local->clone(pair->local);
1135 check->dst = pair->remote->clone(pair->remote);
1136 check->connect_id = chunk_clone(checklist->connect_id);
1137 check->endpoint = endpoint_notify_create_from_host(PEER_REFLEXIVE, NULL,
1138 NULL);
1139
1140 pair->state = CHECK_IN_PROGRESS;
1141
1142 send_check(this, checklist, check, pair, TRUE);
1143
1144 check_destroy(check);
1145
1146 /* schedule this job again */
1147 schedule_checks(this, checklist, ME_INTERVAL);
1148
1149 this->mutex->unlock(this->mutex);
1150
1151 /* we reschedule it manually */
1152 return JOB_REQUEUE_NONE;
1153 }
1154
1155 /**
1156 * Schedules checks for a checklist (time in ms)
1157 */
1158 static void schedule_checks(private_connect_manager_t *this, check_list_t *checklist, u_int32_t time)
1159 {
1160 callback_data_t *data = callback_data_create(this, checklist->connect_id);
1161 checklist->sender = (job_t*)callback_job_create((callback_job_cb_t)sender, data, (callback_job_cleanup_t)callback_data_destroy, NULL);
1162 lib->scheduler->schedule_job_ms(lib->scheduler, checklist->sender, time);
1163 }
1164
1165 /**
1166 * Initiates waiting mediated connections
1167 */
1168 static job_requeue_t initiate_mediated(initiate_data_t *data)
1169 {
1170 check_list_t *checklist = data->checklist;
1171 initiated_t *initiated = data->initiated;
1172
1173 endpoint_pair_t *pair;
1174 if (get_best_valid_pair(checklist, &pair) == SUCCESS)
1175 {
1176 ike_sa_id_t *waiting_sa;
1177 enumerator_t *enumerator = initiated->mediated->create_enumerator(
1178 initiated->mediated);
1179 while (enumerator->enumerate(enumerator, (void**)&waiting_sa))
1180 {
1181 ike_sa_t *sa = charon->ike_sa_manager->checkout(charon->ike_sa_manager, waiting_sa);
1182 if (sa->initiate_mediated(sa, pair->local, pair->remote, checklist->connect_id) != SUCCESS)
1183 {
1184 DBG1(DBG_IKE, "establishing mediated connection failed");
1185 charon->ike_sa_manager->checkin_and_destroy(charon->ike_sa_manager, sa);
1186 }
1187 else
1188 {
1189 charon->ike_sa_manager->checkin(charon->ike_sa_manager, sa);
1190 }
1191 }
1192 enumerator->destroy(enumerator);
1193 }
1194 else
1195 {
1196 /* this should (can?) not happen */
1197 }
1198
1199 return JOB_REQUEUE_NONE;
1200 }
1201
1202 /**
1203 * Finishes checks for a checklist
1204 */
1205 static void finish_checks(private_connect_manager_t *this, check_list_t *checklist)
1206 {
1207 if (checklist->is_initiator)
1208 {
1209 initiated_t *initiated;
1210 if (get_initiated_by_ids(this, checklist->initiator.id,
1211 checklist->responder.id, &initiated) == SUCCESS)
1212 {
1213 remove_checklist(this, checklist);
1214 remove_initiated(this, initiated);
1215
1216 initiate_data_t *data = initiate_data_create(checklist, initiated);
1217 job_t *job = (job_t*)callback_job_create((callback_job_cb_t)initiate_mediated, data, (callback_job_cleanup_t)initiate_data_destroy, NULL);
1218 lib->processor->queue_job(lib->processor, job);
1219 return;
1220 }
1221 else
1222 {
1223 DBG1(DBG_IKE, "there is no mediated connection waiting between '%Y'"
1224 " and '%Y'", checklist->initiator.id, checklist->responder.id);
1225 }
1226 }
1227 }
1228
1229 /**
1230 * Process the response to one of our requests
1231 */
1232 static void process_response(private_connect_manager_t *this, check_t *check,
1233 check_list_t *checklist)
1234 {
1235 endpoint_pair_t *pair;
1236 if (get_pair_by_id(checklist, check->mid, &pair) == SUCCESS)
1237 {
1238 if (pair->local->equals(pair->local, check->dst) &&
1239 pair->remote->equals(pair->remote, check->src))
1240 {
1241 DBG1(DBG_IKE, "endpoint pair '%d' is valid: '%#H' - '%#H'",
1242 pair->id, pair->local, pair->remote);
1243 pair->state = CHECK_SUCCEEDED;
1244 }
1245
1246 linked_list_t *local_endpoints = checklist->is_initiator ?
1247 checklist->initiator.endpoints : checklist->responder.endpoints;
1248
1249 endpoint_notify_t *local_endpoint;
1250 if (endpoints_contain(local_endpoints,
1251 check->endpoint->get_host(check->endpoint),
1252 &local_endpoint) != SUCCESS)
1253 {
1254 local_endpoint = endpoint_notify_create_from_host(PEER_REFLEXIVE,
1255 check->endpoint->get_host(check->endpoint), pair->local);
1256 local_endpoint->set_priority(local_endpoint,
1257 check->endpoint->get_priority(check->endpoint));
1258 local_endpoints->insert_last(local_endpoints, local_endpoint);
1259 }
1260
1261 update_checklist_state(this, checklist);
1262
1263 switch(checklist->state)
1264 {
1265 case CHECK_SUCCEEDED:
1266 case CHECK_FAILED:
1267 finish_checks(this, checklist);
1268 break;
1269 default:
1270 break;
1271 }
1272 }
1273 else
1274 {
1275 DBG1(DBG_IKE, "pair with id '%d' not found", check->mid);
1276 }
1277 }
1278
1279 static void process_request(private_connect_manager_t *this, check_t *check,
1280 check_list_t *checklist)
1281 {
1282 linked_list_t *remote_endpoints = checklist->is_initiator ?
1283 checklist->responder.endpoints : checklist->initiator.endpoints;
1284
1285 endpoint_notify_t *peer_reflexive, *remote_endpoint;
1286 peer_reflexive = endpoint_notify_create_from_host(PEER_REFLEXIVE,
1287 check->src, NULL);
1288 peer_reflexive->set_priority(peer_reflexive,
1289 check->endpoint->get_priority(check->endpoint));
1290
1291 if (endpoints_contain(remote_endpoints, check->src, &remote_endpoint) != SUCCESS)
1292 {
1293 remote_endpoint = peer_reflexive->clone(peer_reflexive);
1294 remote_endpoints->insert_last(remote_endpoints, remote_endpoint);
1295 }
1296
1297 endpoint_pair_t *pair;
1298 if (get_pair_by_hosts(checklist->pairs, check->dst, check->src,
1299 &pair) == SUCCESS)
1300 {
1301 switch(pair->state)
1302 {
1303 case CHECK_IN_PROGRESS:
1304 /* prevent retransmissions */
1305 pair->retransmitted = ME_MAX_RETRANS;
1306 /* FIXME: we should wait to the next rto to send the triggered
1307 * check */
1308 /* fall-through */
1309 case CHECK_WAITING:
1310 case CHECK_FAILED:
1311 queue_triggered_check(this, checklist, pair);
1312 break;
1313 case CHECK_SUCCEEDED:
1314 default:
1315 break;
1316 }
1317 }
1318 else
1319 {
1320 endpoint_notify_t *local_endpoint = endpoint_notify_create_from_host(HOST, check->dst, NULL);
1321
1322 endpoint_notify_t *initiator = checklist->is_initiator ? local_endpoint : remote_endpoint;
1323 endpoint_notify_t *responder = checklist->is_initiator ? remote_endpoint : local_endpoint;
1324
1325 pair = endpoint_pair_create(initiator, responder, checklist->is_initiator);
1326 pair->id = checklist->pairs->get_count(checklist->pairs) + 1;
1327
1328 insert_pair_by_priority(checklist->pairs, pair);
1329
1330 queue_triggered_check(this, checklist, pair);
1331
1332 local_endpoint->destroy(local_endpoint);
1333 }
1334
1335 check_t *response = check_create();
1336
1337 response->mid = check->mid;
1338 response->src = check->dst->clone(check->dst);
1339 response->dst = check->src->clone(check->src);
1340 response->connect_id = chunk_clone(check->connect_id);
1341 response->endpoint = peer_reflexive;
1342
1343 send_check(this, checklist, response, pair, FALSE);
1344
1345 check_destroy(response);
1346 }
1347
1348 /**
1349 * Implementation of connect_manager_t.process_check.
1350 */
1351 static void process_check(private_connect_manager_t *this, message_t *message)
1352 {
1353 if (message->parse_body(message, NULL) != SUCCESS)
1354 {
1355 DBG1(DBG_IKE, "%N %s with message ID %d processing failed",
1356 exchange_type_names, message->get_exchange_type(message),
1357 message->get_request(message) ? "request" : "response",
1358 message->get_message_id(message));
1359 return;
1360 }
1361
1362 check_t *check = check_create();
1363 check->mid = message->get_message_id(message);
1364 check->src = message->get_source(message);
1365 check->src = check->src->clone(check->src);
1366 check->dst = message->get_destination(message);
1367 check->dst = check->dst->clone(check->dst);
1368
1369 if (process_payloads(message, check) != SUCCESS)
1370 {
1371 DBG1(DBG_IKE, "invalid connectivity check %s received",
1372 message->get_request(message) ? "request" : "response");
1373 check_destroy(check);
1374 return;
1375 }
1376
1377 this->mutex->lock(this->mutex);
1378
1379 check_list_t *checklist;
1380 if (get_checklist_by_id(this, check->connect_id, &checklist) != SUCCESS)
1381 {
1382 DBG1(DBG_IKE, "checklist with id '%#B' not found",
1383 &check->connect_id);
1384 check_destroy(check);
1385 this->mutex->unlock(this->mutex);
1386 return;
1387 }
1388
1389 chunk_t sig = build_signature(this, checklist, check, FALSE);
1390 if (!chunk_equals(sig, check->auth))
1391 {
1392 DBG1(DBG_IKE, "connectivity check verification failed");
1393 check_destroy(check);
1394 chunk_free(&sig);
1395 this->mutex->unlock(this->mutex);
1396 return;
1397 }
1398 chunk_free(&sig);
1399
1400 if (message->get_request(message))
1401 {
1402 process_request(this, check, checklist);
1403 }
1404 else
1405 {
1406 process_response(this, check, checklist);
1407 }
1408
1409 this->mutex->unlock(this->mutex);
1410
1411 check_destroy(check);
1412 }
1413
1414 /**
1415 * Implementation of connect_manager_t.check_and_register.
1416 */
1417 static bool check_and_register(private_connect_manager_t *this,
1418 identification_t *id, identification_t *peer_id,
1419 ike_sa_id_t *mediated_sa)
1420 {
1421 initiated_t *initiated;
1422 bool already_there = TRUE;
1423
1424 this->mutex->lock(this->mutex);
1425
1426 if (get_initiated_by_ids(this, id, peer_id, &initiated) != SUCCESS)
1427 {
1428 DBG2(DBG_IKE, "registered waiting mediated connection with '%Y'",
1429 peer_id);
1430 initiated = initiated_create(id, peer_id);
1431 this->initiated->insert_last(this->initiated, initiated);
1432 already_there = FALSE;
1433 }
1434
1435 if (initiated->mediated->find_first(initiated->mediated,
1436 (linked_list_match_t)mediated_sa->equals,
1437 NULL, mediated_sa) != SUCCESS)
1438 {
1439 initiated->mediated->insert_last(initiated->mediated,
1440 mediated_sa->clone(mediated_sa));
1441 }
1442
1443 this->mutex->unlock(this->mutex);
1444
1445 return already_there;
1446 }
1447
1448 /**
1449 * Implementation of connect_manager_t.check_and_initiate.
1450 */
1451 static void check_and_initiate(private_connect_manager_t *this,
1452 ike_sa_id_t *mediation_sa, identification_t *id,
1453 identification_t *peer_id)
1454 {
1455 initiated_t *initiated;
1456
1457 this->mutex->lock(this->mutex);
1458
1459 if (get_initiated_by_ids(this, id, peer_id, &initiated) != SUCCESS)
1460 {
1461 DBG2(DBG_IKE, "no waiting mediated connections with '%Y'", peer_id);
1462 this->mutex->unlock(this->mutex);
1463 return;
1464 }
1465
1466 ike_sa_id_t *waiting_sa;
1467 enumerator_t *enumerator = initiated->mediated->create_enumerator(
1468 initiated->mediated);
1469 while (enumerator->enumerate(enumerator, (void**)&waiting_sa))
1470 {
1471 job_t *job = (job_t*)reinitiate_mediation_job_create(mediation_sa,
1472 waiting_sa);
1473 lib->processor->queue_job(lib->processor, job);
1474 }
1475 enumerator->destroy(enumerator);
1476
1477 this->mutex->unlock(this->mutex);
1478 }
1479
1480 /**
1481 * Implementation of connect_manager_t.set_initiator_data.
1482 */
1483 static status_t set_initiator_data(private_connect_manager_t *this,
1484 identification_t *initiator,
1485 identification_t *responder,
1486 chunk_t connect_id, chunk_t key,
1487 linked_list_t *endpoints, bool is_initiator)
1488 {
1489 check_list_t *checklist;
1490
1491 this->mutex->lock(this->mutex);
1492
1493 if (get_checklist_by_id(this, connect_id, NULL) == SUCCESS)
1494 {
1495 DBG1(DBG_IKE, "checklist with id '%#B' already exists, aborting",
1496 &connect_id);
1497 this->mutex->unlock(this->mutex);
1498 return FAILED;
1499 }
1500
1501 checklist = check_list_create(initiator, responder, connect_id, key,
1502 endpoints, is_initiator);
1503 this->checklists->insert_last(this->checklists, checklist);
1504
1505 this->mutex->unlock(this->mutex);
1506
1507 return SUCCESS;
1508 }
1509
1510 /**
1511 * Implementation of connect_manager_t.set_responder_data.
1512 */
1513 static status_t set_responder_data(private_connect_manager_t *this,
1514 chunk_t connect_id, chunk_t key,
1515 linked_list_t *endpoints)
1516 {
1517 check_list_t *checklist;
1518
1519 this->mutex->lock(this->mutex);
1520
1521 if (get_checklist_by_id(this, connect_id, &checklist) != SUCCESS)
1522 {
1523 DBG1(DBG_IKE, "checklist with id '%#B' not found",
1524 &connect_id);
1525 this->mutex->unlock(this->mutex);
1526 return NOT_FOUND;
1527 }
1528
1529 checklist->responder.key = chunk_clone(key);
1530 checklist->responder.endpoints = endpoints->clone_offset(endpoints,
1531 offsetof(endpoint_notify_t, clone));
1532 checklist->state = CHECK_WAITING;
1533
1534 build_pairs(checklist);
1535
1536 /* send the first check immediately */
1537 schedule_checks(this, checklist, 0);
1538
1539 this->mutex->unlock(this->mutex);
1540
1541 return SUCCESS;
1542 }
1543
1544 /**
1545 * Implementation of connect_manager_t.stop_checks.
1546 */
1547 static status_t stop_checks(private_connect_manager_t *this, chunk_t connect_id)
1548 {
1549 check_list_t *checklist;
1550
1551 this->mutex->lock(this->mutex);
1552
1553 if (get_checklist_by_id(this, connect_id, &checklist) != SUCCESS)
1554 {
1555 DBG1(DBG_IKE, "checklist with id '%#B' not found",
1556 &connect_id);
1557 this->mutex->unlock(this->mutex);
1558 return NOT_FOUND;
1559 }
1560
1561 DBG1(DBG_IKE, "removing checklist with id '%#B'", &connect_id);
1562
1563 remove_checklist(this, checklist);
1564 check_list_destroy(checklist);
1565
1566 this->mutex->unlock(this->mutex);
1567
1568 return SUCCESS;
1569 }
1570
1571 /**
1572 * Implementation of connect_manager_t.destroy.
1573 */
1574 static void destroy(private_connect_manager_t *this)
1575 {
1576 this->mutex->lock(this->mutex);
1577
1578 this->hasher->destroy(this->hasher);
1579 this->checklists->destroy_function(this->checklists, (void*)check_list_destroy);
1580 this->initiated->destroy_function(this->initiated, (void*)initiated_destroy);
1581
1582 this->mutex->unlock(this->mutex);
1583 this->mutex->destroy(this->mutex);
1584 free(this);
1585 }
1586
1587 /*
1588 * Described in header.
1589 */
1590 connect_manager_t *connect_manager_create()
1591 {
1592 private_connect_manager_t *this = malloc_thing(private_connect_manager_t);
1593
1594 this->public.destroy = (void(*)(connect_manager_t*))destroy;
1595 this->public.check_and_register = (bool(*)(connect_manager_t*,identification_t*,identification_t*,ike_sa_id_t*))check_and_register;
1596 this->public.check_and_initiate = (void(*)(connect_manager_t*,ike_sa_id_t*,identification_t*,identification_t*))check_and_initiate;
1597 this->public.set_initiator_data = (status_t(*)(connect_manager_t*,identification_t*,identification_t*,chunk_t,chunk_t,linked_list_t*,bool))set_initiator_data;
1598 this->public.set_responder_data = (status_t(*)(connect_manager_t*,chunk_t,chunk_t,linked_list_t*))set_responder_data;
1599 this->public.process_check = (void(*)(connect_manager_t*,message_t*))process_check;
1600 this->public.stop_checks = (status_t(*)(connect_manager_t*,chunk_t))stop_checks;
1601
1602 this->hasher = lib->crypto->create_hasher(lib->crypto, HASH_SHA1);
1603 if (this->hasher == NULL)
1604 {
1605 DBG1(DBG_IKE, "unable to create connect manager, SHA1 not supported");
1606 free(this);
1607 return NULL;
1608 }
1609
1610 this->checklists = linked_list_create();
1611 this->initiated = linked_list_create();
1612
1613 this->mutex = mutex_create(MUTEX_TYPE_DEFAULT);
1614
1615 return (connect_manager_t*)this;
1616 }