Task added for IKEv1 NAT detection.
[strongswan.git] / src / libcharon / sa / task_manager_v1.c
1 /*
2 * Copyright (C) 2007-2011 Tobias Brunner
3 * Copyright (C) 2007-2011 Martin Willi
4 * Hochschule fuer Technik Rapperswil
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation; either version 2 of the License, or (at your
9 * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
10 *
11 * This program is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
13 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * for more details.
15 */
16
17 #include "task_manager_v1.h"
18
19 #include <math.h>
20
21 #include <daemon.h>
22 #include <sa/tasks/main_mode.h>
23 #include <sa/tasks/quick_mode.h>
24 #include <sa/tasks/xauth_request.h>
25 #include <sa/tasks/ike_natd_v1.h>
26 #include <sa/tasks/ike_vendor_v1.h>
27 #include <processing/jobs/retransmit_job.h>
28 #include <processing/jobs/delete_ike_sa_job.h>
29
30 typedef struct exchange_t exchange_t;
31
32 /**
33 * An exchange in the air, used do detect and handle retransmission
34 */
35 struct exchange_t {
36
37 /**
38 * Message ID used for this transaction
39 */
40 u_int32_t mid;
41
42 /**
43 * generated packet for retransmission
44 */
45 packet_t *packet;
46 };
47
48 typedef struct private_task_manager_t private_task_manager_t;
49
50 /**
51 * private data of the task manager
52 */
53 struct private_task_manager_t {
54
55 /**
56 * public functions
57 */
58 task_manager_v1_t public;
59
60 /**
61 * associated IKE_SA we are serving
62 */
63 ike_sa_t *ike_sa;
64
65 /**
66 * RNG to create message IDs
67 */
68 rng_t *rng;
69
70 /**
71 * Exchange we are currently handling as responder
72 */
73 struct {
74 /**
75 * Message ID of the exchange
76 */
77 u_int32_t mid;
78
79 /**
80 * Hash of a previously received message
81 */
82 u_int32_t hash;
83
84 /**
85 * packet for retransmission
86 */
87 packet_t *packet;
88
89 } responding;
90
91 /**
92 * Exchange we are currently handling as initiator
93 */
94 struct {
95 /**
96 * Message ID of the exchange
97 */
98 u_int32_t mid;
99
100 /**
101 * Hash of a previously received message
102 */
103 u_int32_t hash;
104
105 /**
106 * how many times we have retransmitted so far
107 */
108 u_int retransmitted;
109
110 /**
111 * packet for retransmission
112 */
113 packet_t *packet;
114
115 /**
116 * type of the initated exchange
117 */
118 exchange_type_t type;
119
120 } initiating;
121
122 /**
123 * List of queued tasks not yet in action
124 */
125 linked_list_t *queued_tasks;
126
127 /**
128 * List of active tasks, initiated by ourselve
129 */
130 linked_list_t *active_tasks;
131
132 /**
133 * List of tasks initiated by peer
134 */
135 linked_list_t *passive_tasks;
136
137 /**
138 * Number of times we retransmit messages before giving up
139 */
140 u_int retransmit_tries;
141
142 /**
143 * Retransmission timeout
144 */
145 double retransmit_timeout;
146
147 /**
148 * Base to calculate retransmission timeout
149 */
150 double retransmit_base;
151 };
152
153 /**
154 * flush all tasks in the task manager
155 */
156 static void flush(private_task_manager_t *this)
157 {
158 this->queued_tasks->destroy_offset(this->queued_tasks,
159 offsetof(task_t, destroy));
160 this->queued_tasks = linked_list_create();
161 this->passive_tasks->destroy_offset(this->passive_tasks,
162 offsetof(task_t, destroy));
163 this->passive_tasks = linked_list_create();
164 this->active_tasks->destroy_offset(this->active_tasks,
165 offsetof(task_t, destroy));
166 this->active_tasks = linked_list_create();
167 }
168
169 /**
170 * move a task of a specific type from the queue to the active list
171 */
172 static bool activate_task(private_task_manager_t *this, task_type_t type)
173 {
174 enumerator_t *enumerator;
175 task_t *task;
176 bool found = FALSE;
177
178 enumerator = this->queued_tasks->create_enumerator(this->queued_tasks);
179 while (enumerator->enumerate(enumerator, (void**)&task))
180 {
181 if (task->get_type(task) == type)
182 {
183 DBG2(DBG_IKE, " activating %N task", task_type_names, type);
184 this->queued_tasks->remove_at(this->queued_tasks, enumerator);
185 this->active_tasks->insert_last(this->active_tasks, task);
186 found = TRUE;
187 break;
188 }
189 }
190 enumerator->destroy(enumerator);
191 return found;
192 }
193
194 METHOD(task_manager_t, retransmit, status_t,
195 private_task_manager_t *this, u_int32_t message_id)
196 {
197 if (message_id == this->initiating.mid)
198 {
199 u_int32_t timeout;
200 packet_t *packet;
201 job_t *job;
202
203 if (this->initiating.retransmitted <= this->retransmit_tries)
204 {
205 timeout = (u_int32_t)(this->retransmit_timeout * 1000.0 *
206 pow(this->retransmit_base, this->initiating.retransmitted));
207 }
208 else
209 {
210 DBG1(DBG_IKE, "giving up after %d retransmits",
211 this->initiating.retransmitted - 1);
212 if (this->ike_sa->get_state(this->ike_sa) != IKE_CONNECTING)
213 {
214 charon->bus->ike_updown(charon->bus, this->ike_sa, FALSE);
215 }
216 return DESTROY_ME;
217 }
218
219 if (this->initiating.retransmitted)
220 {
221 DBG1(DBG_IKE, "retransmit %d of request with message ID %d",
222 this->initiating.retransmitted, message_id);
223 }
224 packet = this->initiating.packet->clone(this->initiating.packet);
225 charon->sender->send(charon->sender, packet);
226
227 this->initiating.retransmitted++;
228 job = (job_t*)retransmit_job_create(this->initiating.mid,
229 this->ike_sa->get_id(this->ike_sa));
230 lib->scheduler->schedule_job_ms(lib->scheduler, job, timeout);
231 }
232 return SUCCESS;
233 }
234
235 METHOD(task_manager_t, initiate, status_t,
236 private_task_manager_t *this)
237 {
238 enumerator_t *enumerator;
239 task_t *task;
240 message_t *message;
241 host_t *me, *other;
242 status_t status;
243 exchange_type_t exchange = EXCHANGE_TYPE_UNDEFINED;
244 bool new_mid = FALSE;
245
246 if (!this->rng)
247 {
248 DBG1(DBG_IKE, "no RNG supported");
249 return FAILED;
250 }
251
252 if (this->initiating.type != EXCHANGE_TYPE_UNDEFINED)
253 {
254 DBG2(DBG_IKE, "delaying task initiation, %N exchange in progress",
255 exchange_type_names, this->initiating.type);
256 /* do not initiate if we already have a message in the air */
257 return SUCCESS;
258 }
259
260 if (this->active_tasks->get_count(this->active_tasks) == 0)
261 {
262 DBG2(DBG_IKE, "activating new tasks");
263 switch (this->ike_sa->get_state(this->ike_sa))
264 {
265 case IKE_CREATED:
266 activate_task(this, TASK_VENDOR_V1);
267 if (activate_task(this, TASK_MAIN_MODE))
268 {
269 exchange = ID_PROT;
270 activate_task(this, TASK_IKE_NATD_V1);
271 }
272 break;
273 case IKE_CONNECTING:
274 if (activate_task(this, TASK_XAUTH_REQUEST))
275 {
276 exchange = TRANSACTION;
277 new_mid = TRUE;
278 }
279 break;
280 case IKE_ESTABLISHED:
281 if (activate_task(this, TASK_QUICK_MODE))
282 {
283 exchange = QUICK_MODE;
284 new_mid = TRUE;
285 break;
286 }
287 break;
288 default:
289 break;
290 }
291 }
292 else
293 {
294 DBG2(DBG_IKE, "reinitiating already active tasks");
295 enumerator = this->active_tasks->create_enumerator(this->active_tasks);
296 while (enumerator->enumerate(enumerator, (void**)&task))
297 {
298 DBG2(DBG_IKE, " %N task", task_type_names, task->get_type(task));
299 switch (task->get_type(task))
300 {
301 case TASK_MAIN_MODE:
302 exchange = ID_PROT;
303 break;
304 case TASK_QUICK_MODE:
305 exchange = QUICK_MODE;
306 break;
307 case TASK_XAUTH_REQUEST:
308 exchange = TRANSACTION;
309 new_mid = TRUE;
310 break;
311 default:
312 continue;
313 }
314 break;
315 }
316 enumerator->destroy(enumerator);
317 }
318
319 if (exchange == EXCHANGE_TYPE_UNDEFINED)
320 {
321 DBG2(DBG_IKE, "nothing to initiate");
322 /* nothing to do yet... */
323 return SUCCESS;
324 }
325
326 me = this->ike_sa->get_my_host(this->ike_sa);
327 other = this->ike_sa->get_other_host(this->ike_sa);
328
329 message = message_create(IKEV1_MAJOR_VERSION, IKEV1_MINOR_VERSION);
330 if (new_mid)
331 {
332 this->rng->get_bytes(this->rng, sizeof(this->initiating.mid),
333 (void*)&this->initiating.mid);
334 }
335 message->set_message_id(message, this->initiating.mid);
336 message->set_source(message, me->clone(me));
337 message->set_destination(message, other->clone(other));
338 message->set_exchange_type(message, exchange);
339 this->initiating.type = exchange;
340 this->initiating.retransmitted = 0;
341
342 enumerator = this->active_tasks->create_enumerator(this->active_tasks);
343 while (enumerator->enumerate(enumerator, (void*)&task))
344 {
345 switch (task->build(task, message))
346 {
347 case SUCCESS:
348 /* task completed, remove it */
349 this->active_tasks->remove_at(this->active_tasks, enumerator);
350 task->destroy(task);
351 break;
352 case NEED_MORE:
353 /* processed, but task needs another exchange */
354 break;
355 case FAILED:
356 default:
357 if (this->ike_sa->get_state(this->ike_sa) != IKE_CONNECTING)
358 {
359 charon->bus->ike_updown(charon->bus, this->ike_sa, FALSE);
360 }
361 /* FALL */
362 case DESTROY_ME:
363 /* critical failure, destroy IKE_SA */
364 enumerator->destroy(enumerator);
365 message->destroy(message);
366 flush(this);
367 return DESTROY_ME;
368 }
369 }
370 enumerator->destroy(enumerator);
371
372 /* update exchange type if a task changed it */
373 this->initiating.type = message->get_exchange_type(message);
374
375 status = this->ike_sa->generate_message(this->ike_sa, message,
376 &this->initiating.packet);
377 if (status != SUCCESS)
378 {
379 /* message generation failed. There is nothing more to do than to
380 * close the SA */
381 message->destroy(message);
382 flush(this);
383 charon->bus->ike_updown(charon->bus, this->ike_sa, FALSE);
384 return DESTROY_ME;
385 }
386 message->destroy(message);
387
388 charon->sender->send(charon->sender,
389 this->initiating.packet->clone(this->initiating.packet));
390
391 return SUCCESS;
392 }
393
394 /**
395 * handle exchange collisions
396 */
397 static bool handle_collisions(private_task_manager_t *this, task_t *task)
398 {
399 return FALSE;
400 }
401
402 /**
403 * build a response depending on the "passive" task list
404 */
405 static status_t build_response(private_task_manager_t *this, message_t *request)
406 {
407 enumerator_t *enumerator;
408 task_t *task;
409 message_t *message;
410 host_t *me, *other;
411 bool delete = FALSE;
412 status_t status;
413
414 me = request->get_destination(request);
415 other = request->get_source(request);
416
417 message = message_create(IKEV1_MAJOR_VERSION, IKEV1_MINOR_VERSION);
418 message->set_exchange_type(message, request->get_exchange_type(request));
419 /* send response along the path the request came in */
420 message->set_source(message, me->clone(me));
421 message->set_destination(message, other->clone(other));
422 message->set_message_id(message, request->get_message_id(request));
423 message->set_request(message, FALSE);
424
425 enumerator = this->passive_tasks->create_enumerator(this->passive_tasks);
426 while (enumerator->enumerate(enumerator, (void*)&task))
427 {
428 switch (task->build(task, message))
429 {
430 case SUCCESS:
431 /* task completed, remove it */
432 this->passive_tasks->remove_at(this->passive_tasks, enumerator);
433 if (!handle_collisions(this, task))
434 {
435 task->destroy(task);
436 }
437 break;
438 case NEED_MORE:
439 /* processed, but task needs another exchange */
440 if (handle_collisions(this, task))
441 {
442 this->passive_tasks->remove_at(this->passive_tasks,
443 enumerator);
444 }
445 break;
446 case FAILED:
447 default:
448 charon->bus->ike_updown(charon->bus, this->ike_sa, FALSE);
449 /* FALL */
450 case DESTROY_ME:
451 /* destroy IKE_SA, but SEND response first */
452 delete = TRUE;
453 break;
454 }
455 if (delete)
456 {
457 break;
458 }
459 }
460 enumerator->destroy(enumerator);
461
462 /* message complete, send it */
463 DESTROY_IF(this->responding.packet);
464 this->responding.packet = NULL;
465 status = this->ike_sa->generate_message(this->ike_sa, message,
466 &this->responding.packet);
467 message->destroy(message);
468 if (status != SUCCESS)
469 {
470 charon->bus->ike_updown(charon->bus, this->ike_sa, FALSE);
471 return DESTROY_ME;
472 }
473
474 charon->sender->send(charon->sender,
475 this->responding.packet->clone(this->responding.packet));
476 if (delete)
477 {
478 return DESTROY_ME;
479 }
480 return SUCCESS;
481 }
482
483 /**
484 * handle an incoming request message
485 */
486 static status_t process_request(private_task_manager_t *this,
487 message_t *message)
488 {
489 enumerator_t *enumerator;
490 task_t *task = NULL;
491
492 if (this->passive_tasks->get_count(this->passive_tasks) == 0)
493 { /* create tasks depending on request type, if not already some queued */
494 switch (message->get_exchange_type(message))
495 {
496 case ID_PROT:
497 task = (task_t *)ike_vendor_v1_create(this->ike_sa, FALSE);
498 this->passive_tasks->insert_last(this->passive_tasks, task);
499 task = (task_t *)main_mode_create(this->ike_sa, FALSE);
500 this->passive_tasks->insert_last(this->passive_tasks, task);
501 task = (task_t *)ike_natd_v1_create(this->ike_sa, FALSE);
502 this->passive_tasks->insert_last(this->passive_tasks, task);
503 break;
504 case AGGRESSIVE:
505 /* TODO-IKEv1: agressive mode */
506 return FAILED;
507 case QUICK_MODE:
508 task = (task_t *)quick_mode_create(this->ike_sa, NULL,
509 NULL, NULL);
510 this->passive_tasks->insert_last(this->passive_tasks, task);
511 break;
512 case INFORMATIONAL_V1:
513 /* TODO-IKEv1: informational */
514 return FAILED;
515 case TRANSACTION:
516 task = (task_t *)xauth_request_create(this->ike_sa, FALSE);
517 this->passive_tasks->insert_last(this->passive_tasks, task);
518 break;
519 default:
520 return FAILED;
521 }
522 }
523 /* let the tasks process the message */
524 enumerator = this->passive_tasks->create_enumerator(this->passive_tasks);
525 while (enumerator->enumerate(enumerator, (void*)&task))
526 {
527 switch (task->process(task, message))
528 {
529 case SUCCESS:
530 /* task completed, remove it */
531 this->passive_tasks->remove_at(this->passive_tasks, enumerator);
532 task->destroy(task);
533 enumerator->destroy(enumerator);
534 return SUCCESS;
535 case NEED_MORE:
536 /* processed, but task needs at least another call to build() */
537 break;
538 case FAILED:
539 default:
540 charon->bus->ike_updown(charon->bus, this->ike_sa, FALSE);
541 /* FALL */
542 case DESTROY_ME:
543 /* critical failure, destroy IKE_SA */
544 this->passive_tasks->remove_at(this->passive_tasks, enumerator);
545 enumerator->destroy(enumerator);
546 task->destroy(task);
547 return DESTROY_ME;
548 }
549 }
550 enumerator->destroy(enumerator);
551
552 return build_response(this, message);
553 }
554
555 /**
556 * handle an incoming response message
557 */
558 static status_t process_response(private_task_manager_t *this,
559 message_t *message)
560 {
561 enumerator_t *enumerator;
562 task_t *task;
563
564 if (message->get_exchange_type(message) != this->initiating.type)
565 {
566 DBG1(DBG_IKE, "received %N response, but expected %N",
567 exchange_type_names, message->get_exchange_type(message),
568 exchange_type_names, this->initiating.type);
569 charon->bus->ike_updown(charon->bus, this->ike_sa, FALSE);
570 return DESTROY_ME;
571 }
572
573 enumerator = this->active_tasks->create_enumerator(this->active_tasks);
574 while (enumerator->enumerate(enumerator, (void*)&task))
575 {
576 switch (task->process(task, message))
577 {
578 case SUCCESS:
579 /* task completed, remove it */
580 this->active_tasks->remove_at(this->active_tasks, enumerator);
581 task->destroy(task);
582 break;
583 case NEED_MORE:
584 /* processed, but task needs another exchange */
585 break;
586 case FAILED:
587 default:
588 charon->bus->ike_updown(charon->bus, this->ike_sa, FALSE);
589 /* FALL */
590 case DESTROY_ME:
591 /* critical failure, destroy IKE_SA */
592 this->active_tasks->remove_at(this->active_tasks, enumerator);
593 enumerator->destroy(enumerator);
594 task->destroy(task);
595 return DESTROY_ME;
596 }
597 }
598 enumerator->destroy(enumerator);
599
600 this->initiating.type = EXCHANGE_TYPE_UNDEFINED;
601 this->initiating.packet->destroy(this->initiating.packet);
602 this->initiating.packet = NULL;
603
604 return initiate(this);
605 }
606
607 /**
608 * Send a notify in a separate INFORMATIONAL exchange back to the sender.
609 */
610 static void send_notify_response(private_task_manager_t *this,
611 message_t *request, notify_type_t type,
612 chunk_t data)
613 {
614 message_t *response;
615 packet_t *packet;
616 host_t *me, *other;
617 u_int32_t mid;
618
619 if (request->get_exchange_type(request) == INFORMATIONAL_V1)
620 { /* don't respond to INFORMATIONAL requests to avoid a notify war */
621 DBG1(DBG_IKE, "ignore malformed INFORMATIONAL request");
622 return;
623 }
624
625 response = message_create(IKEV1_MAJOR_VERSION, IKEV1_MINOR_VERSION);
626 response->set_exchange_type(response, INFORMATIONAL_V1);
627 response->set_request(response, TRUE);
628 this->rng->get_bytes(this->rng, sizeof(mid), (void*)&mid);
629 response->set_message_id(response, mid);
630 response->add_notify(response, FALSE, type, data);
631 me = this->ike_sa->get_my_host(this->ike_sa);
632 if (me->is_anyaddr(me))
633 {
634 me = request->get_destination(request);
635 this->ike_sa->set_my_host(this->ike_sa, me->clone(me));
636 }
637 other = this->ike_sa->get_other_host(this->ike_sa);
638 if (other->is_anyaddr(other))
639 {
640 other = request->get_source(request);
641 this->ike_sa->set_other_host(this->ike_sa, other->clone(other));
642 }
643 response->set_source(response, me->clone(me));
644 response->set_destination(response, other->clone(other));
645 if (this->ike_sa->generate_message(this->ike_sa, response,
646 &packet) == SUCCESS)
647 {
648 charon->sender->send(charon->sender, packet);
649 }
650 response->destroy(response);
651 }
652
653 /**
654 * Parse the given message and verify that it is valid.
655 */
656 static status_t parse_message(private_task_manager_t *this, message_t *msg)
657 {
658 status_t status;
659
660 status = msg->parse_body(msg, this->ike_sa->get_keymat(this->ike_sa));
661
662 if (status != SUCCESS)
663 {
664 switch (status)
665 {
666 case NOT_SUPPORTED:
667 DBG1(DBG_IKE, "unsupported exchange type");
668 send_notify_response(this, msg,
669 INVALID_EXCHANGE_TYPE, chunk_empty);
670 break;
671 case PARSE_ERROR:
672 DBG1(DBG_IKE, "message parsing failed");
673 send_notify_response(this, msg,
674 PAYLOAD_MALFORMED, chunk_empty);
675 break;
676 case VERIFY_ERROR:
677 DBG1(DBG_IKE, "message verification failed");
678 send_notify_response(this, msg,
679 PAYLOAD_MALFORMED, chunk_empty);
680 break;
681 case FAILED:
682 DBG1(DBG_IKE, "integrity check failed");
683 send_notify_response(this, msg,
684 INVALID_HASH_INFORMATION, chunk_empty);
685 break;
686 case INVALID_STATE:
687 DBG1(DBG_IKE, "found encrypted message, but no keys available");
688 send_notify_response(this, msg,
689 PAYLOAD_MALFORMED, chunk_empty);
690 default:
691 break;
692 }
693 DBG1(DBG_IKE, "%N %s with message ID %d processing failed",
694 exchange_type_names, msg->get_exchange_type(msg),
695 msg->get_request(msg) ? "request" : "response",
696 msg->get_message_id(msg));
697
698 if (this->ike_sa->get_state(this->ike_sa) == IKE_CREATED)
699 { /* invalid initiation attempt, close SA */
700 return DESTROY_ME;
701 }
702 }
703 return status;
704 }
705
706 METHOD(task_manager_t, process_message, status_t,
707 private_task_manager_t *this, message_t *msg)
708 {
709 u_int32_t hash, mid;
710 host_t *me, *other;
711 status_t status;
712
713 /* TODO-IKEv1: update hosts more selectively */
714 me = msg->get_destination(msg);
715 other = msg->get_source(msg);
716 mid = msg->get_message_id(msg);
717
718 if ((mid && mid == this->initiating.mid) ||
719 (this->initiating.mid == 0 &&
720 this->active_tasks->get_count(this->active_tasks)))
721 {
722 msg->set_request(msg, FALSE);
723 status = parse_message(this, msg);
724 if (status != SUCCESS)
725 {
726 return status;
727 }
728 this->ike_sa->set_statistic(this->ike_sa, STAT_INBOUND,
729 time_monotonic(NULL));
730 this->ike_sa->update_hosts(this->ike_sa, me, other, TRUE);
731 charon->bus->message(charon->bus, msg, FALSE);
732 if (process_response(this, msg) != SUCCESS)
733 {
734 flush(this);
735 return DESTROY_ME;
736 }
737 }
738 else
739 {
740 hash = chunk_hash(msg->get_packet_data(msg));
741 if (hash == this->responding.hash)
742 {
743 DBG1(DBG_IKE, "received retransmit of request with ID %d, "
744 "retransmitting response", mid);
745 charon->sender->send(charon->sender,
746 this->responding.packet->clone(this->responding.packet));
747 return SUCCESS;
748 }
749 msg->set_request(msg, TRUE);
750 status = parse_message(this, msg);
751 if (status != SUCCESS)
752 {
753 return status;
754 }
755 /* if this IKE_SA is virgin, we check for a config */
756 if (this->ike_sa->get_ike_cfg(this->ike_sa) == NULL)
757 {
758 ike_sa_id_t *ike_sa_id;
759 ike_cfg_t *ike_cfg;
760 job_t *job;
761 ike_cfg = charon->backends->get_ike_cfg(charon->backends, me, other);
762 if (ike_cfg == NULL)
763 {
764 /* no config found for these hosts, destroy */
765 DBG1(DBG_IKE, "no IKE config found for %H...%H, sending %N",
766 me, other, notify_type_names, NO_PROPOSAL_CHOSEN);
767 send_notify_response(this, msg,
768 NO_PROPOSAL_CHOSEN, chunk_empty);
769 return DESTROY_ME;
770 }
771 this->ike_sa->set_ike_cfg(this->ike_sa, ike_cfg);
772 ike_cfg->destroy(ike_cfg);
773 /* add a timeout if peer does not establish it completely */
774 ike_sa_id = this->ike_sa->get_id(this->ike_sa);
775 job = (job_t*)delete_ike_sa_job_create(ike_sa_id, FALSE);
776 lib->scheduler->schedule_job(lib->scheduler, job,
777 lib->settings->get_int(lib->settings,
778 "charon.half_open_timeout", HALF_OPEN_IKE_SA_TIMEOUT));
779 }
780 this->ike_sa->set_statistic(this->ike_sa, STAT_INBOUND,
781 time_monotonic(NULL));
782 this->ike_sa->update_hosts(this->ike_sa, me, other, TRUE);
783 charon->bus->message(charon->bus, msg, TRUE);
784 if (process_request(this, msg) != SUCCESS)
785 {
786 flush(this);
787 return DESTROY_ME;
788 }
789
790 this->responding.mid = mid;
791 this->responding.hash = hash;
792 }
793 return SUCCESS;
794 }
795
796 METHOD(task_manager_t, queue_task, void,
797 private_task_manager_t *this, task_t *task)
798 {
799 DBG2(DBG_IKE, "queueing %N task", task_type_names, task->get_type(task));
800 this->queued_tasks->insert_last(this->queued_tasks, task);
801 }
802
803 METHOD(task_manager_t, adopt_tasks, void,
804 private_task_manager_t *this, task_manager_t *other_public)
805 {
806 private_task_manager_t *other = (private_task_manager_t*)other_public;
807 task_t *task;
808
809 /* move queued tasks from other to this */
810 while (other->queued_tasks->remove_last(other->queued_tasks,
811 (void**)&task) == SUCCESS)
812 {
813 DBG2(DBG_IKE, "migrating %N task", task_type_names, task->get_type(task));
814 task->migrate(task, this->ike_sa);
815 this->queued_tasks->insert_first(this->queued_tasks, task);
816 }
817 }
818
819 METHOD(task_manager_t, busy, bool,
820 private_task_manager_t *this)
821 {
822 return (this->active_tasks->get_count(this->active_tasks) > 0);
823 }
824
825 METHOD(task_manager_t, incr_mid, void,
826 private_task_manager_t *this, bool initiate)
827 {
828 }
829
830 METHOD(task_manager_t, reset, void,
831 private_task_manager_t *this, u_int32_t initiate, u_int32_t respond)
832 {
833 }
834
835 METHOD(task_manager_t, create_task_enumerator, enumerator_t*,
836 private_task_manager_t *this, task_queue_t queue)
837 {
838 switch (queue)
839 {
840 case TASK_QUEUE_ACTIVE:
841 return this->active_tasks->create_enumerator(this->active_tasks);
842 case TASK_QUEUE_PASSIVE:
843 return this->passive_tasks->create_enumerator(this->passive_tasks);
844 case TASK_QUEUE_QUEUED:
845 return this->queued_tasks->create_enumerator(this->queued_tasks);
846 default:
847 return enumerator_create_empty();
848 }
849 }
850
851 METHOD(task_manager_t, destroy, void,
852 private_task_manager_t *this)
853 {
854 flush(this);
855
856 this->active_tasks->destroy(this->active_tasks);
857 this->queued_tasks->destroy(this->queued_tasks);
858 this->passive_tasks->destroy(this->passive_tasks);
859
860 DESTROY_IF(this->responding.packet);
861 DESTROY_IF(this->initiating.packet);
862 DESTROY_IF(this->rng);
863 free(this);
864 }
865
866 /*
867 * see header file
868 */
869 task_manager_v1_t *task_manager_v1_create(ike_sa_t *ike_sa)
870 {
871 private_task_manager_t *this;
872
873 INIT(this,
874 .public = {
875 .task_manager = {
876 .process_message = _process_message,
877 .queue_task = _queue_task,
878 .initiate = _initiate,
879 .retransmit = _retransmit,
880 .incr_mid = _incr_mid,
881 .reset = _reset,
882 .adopt_tasks = _adopt_tasks,
883 .busy = _busy,
884 .create_task_enumerator = _create_task_enumerator,
885 .destroy = _destroy,
886 },
887 },
888 .ike_sa = ike_sa,
889 .initiating.type = EXCHANGE_TYPE_UNDEFINED,
890 .rng = lib->crypto->create_rng(lib->crypto, RNG_WEAK),
891 .queued_tasks = linked_list_create(),
892 .active_tasks = linked_list_create(),
893 .passive_tasks = linked_list_create(),
894 .retransmit_tries = lib->settings->get_int(lib->settings,
895 "charon.retransmit_tries", RETRANSMIT_TRIES),
896 .retransmit_timeout = lib->settings->get_double(lib->settings,
897 "charon.retransmit_timeout", RETRANSMIT_TIMEOUT),
898 .retransmit_base = lib->settings->get_double(lib->settings,
899 "charon.retransmit_base", RETRANSMIT_BASE),
900 );
901
902 return &this->public;
903 }