2 * Copyright (C) 2007-2015 Tobias Brunner
3 * Copyright (C) 2007-2011 Martin Willi
4 * Hochschule fuer Technik Rapperswil
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>.
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
17 #include "task_manager_v1.h"
22 #include <sa/ikev1/tasks/main_mode.h>
23 #include <sa/ikev1/tasks/aggressive_mode.h>
24 #include <sa/ikev1/tasks/quick_mode.h>
25 #include <sa/ikev1/tasks/quick_delete.h>
26 #include <sa/ikev1/tasks/xauth.h>
27 #include <sa/ikev1/tasks/mode_config.h>
28 #include <sa/ikev1/tasks/informational.h>
29 #include <sa/ikev1/tasks/isakmp_natd.h>
30 #include <sa/ikev1/tasks/isakmp_vendor.h>
31 #include <sa/ikev1/tasks/isakmp_cert_pre.h>
32 #include <sa/ikev1/tasks/isakmp_cert_post.h>
33 #include <sa/ikev1/tasks/isakmp_delete.h>
34 #include <sa/ikev1/tasks/isakmp_dpd.h>
36 #include <processing/jobs/retransmit_job.h>
37 #include <processing/jobs/delete_ike_sa_job.h>
38 #include <processing/jobs/dpd_timeout_job.h>
39 #include <processing/jobs/process_message_job.h>
41 #include <collections/array.h>
44 * Number of old messages hashes we keep for retransmission.
46 * In Main Mode, we must ignore messages from a previous message pair if
47 * we already continued to the next. Otherwise a late retransmission
48 * could be considered as a reply to the newer request.
50 #define MAX_OLD_HASHES 2
53 * First sequence number of responding packets.
55 * To distinguish retransmission jobs for initiating and responding packets,
56 * we split up the sequence counter and use the upper half for responding.
58 #define RESPONDING_SEQ INT_MAX
60 typedef struct exchange_t exchange_t
;
63 * An exchange in the air, used do detect and handle retransmission
68 * Message ID used for this transaction
73 * generated packet for retransmission
78 typedef struct private_task_manager_t private_task_manager_t
;
81 * private data of the task manager
83 struct private_task_manager_t
{
88 task_manager_v1_t
public;
91 * associated IKE_SA we are serving
96 * RNG to create message IDs
101 * Exchange we are currently handling as responder
105 * Message ID of the last response
110 * Hash of a previously received message
115 * packet(s) for retransmission
120 * Sequence number of the last sent message
125 * how many times we have retransmitted so far
132 * Exchange we are currently handling as initiator
136 * Message ID of the exchange
141 * Hashes of old responses we can ignore
143 u_int32_t old_hashes
[MAX_OLD_HASHES
];
146 * Position in old hash array
151 * Sequence number of the last sent message
156 * how many times we have retransmitted so far
161 * packet(s) for retransmission
166 * type of the initiated exchange
168 exchange_type_t type
;
173 * Message we are currently defragmenting, if any (only one at a time)
178 * List of queued tasks not yet in action
180 linked_list_t
*queued_tasks
;
183 * List of active tasks, initiated by ourselves
185 linked_list_t
*active_tasks
;
188 * List of tasks initiated by peer
190 linked_list_t
*passive_tasks
;
193 * Queued messages not yet ready to process
198 * Number of times we retransmit messages before giving up
200 u_int retransmit_tries
;
203 * Retransmission timeout
205 double retransmit_timeout
;
208 * Base to calculate retransmission timeout
210 double retransmit_base
;
213 * Sequence number for sending DPD requests
218 * Sequence number for received DPD requests
224 * Reset retransmission packet list
226 static void clear_packets(array_t
*array
)
230 while (array_remove(array
, ARRAY_TAIL
, &packet
))
232 packet
->destroy(packet
);
236 METHOD(task_manager_t
, flush_queue
, void,
237 private_task_manager_t
*this, task_queue_t queue
)
244 this->queued
->destroy(this->queued
);
249 case TASK_QUEUE_ACTIVE
:
250 list
= this->active_tasks
;
251 /* cancel pending retransmits */
252 this->initiating
.type
= EXCHANGE_TYPE_UNDEFINED
;
253 clear_packets(this->initiating
.packets
);
255 case TASK_QUEUE_PASSIVE
:
256 list
= this->passive_tasks
;
258 case TASK_QUEUE_QUEUED
:
259 list
= this->queued_tasks
;
264 while (list
->remove_last(list
, (void**)&task
) == SUCCESS
)
270 METHOD(task_manager_t
, flush
, void,
271 private_task_manager_t
*this)
273 flush_queue(this, TASK_QUEUE_QUEUED
);
274 flush_queue(this, TASK_QUEUE_PASSIVE
);
275 flush_queue(this, TASK_QUEUE_ACTIVE
);
279 * move a task of a specific type from the queue to the active list
281 static bool activate_task(private_task_manager_t
*this, task_type_t type
)
283 enumerator_t
*enumerator
;
287 enumerator
= this->queued_tasks
->create_enumerator(this->queued_tasks
);
288 while (enumerator
->enumerate(enumerator
, (void**)&task
))
290 if (task
->get_type(task
) == type
)
292 DBG2(DBG_IKE
, " activating %N task", task_type_names
, type
);
293 this->queued_tasks
->remove_at(this->queued_tasks
, enumerator
);
294 this->active_tasks
->insert_last(this->active_tasks
, task
);
299 enumerator
->destroy(enumerator
);
304 * Send packets in the given array (they get cloned)
306 static void send_packets(private_task_manager_t
*this, array_t
*packets
)
308 enumerator_t
*enumerator
;
311 enumerator
= array_create_enumerator(packets
);
312 while (enumerator
->enumerate(enumerator
, &packet
))
314 charon
->sender
->send(charon
->sender
, packet
->clone(packet
));
316 enumerator
->destroy(enumerator
);
320 * Generates the given message and stores packet(s) in the given array
322 static bool generate_message(private_task_manager_t
*this, message_t
*message
,
325 enumerator_t
*fragments
;
328 if (this->ike_sa
->generate_message_fragmented(this->ike_sa
, message
,
329 &fragments
) != SUCCESS
)
333 while (fragments
->enumerate(fragments
, &fragment
))
335 array_insert_create(packets
, ARRAY_TAIL
, fragment
);
337 fragments
->destroy(fragments
);
342 * Retransmit a packet (or its fragments)
344 static status_t
retransmit_packet(private_task_manager_t
*this, u_int32_t seqnr
,
345 u_int mid
, u_int retransmitted
, array_t
*packets
)
350 array_get(packets
, 0, &packet
);
351 if (retransmitted
> this->retransmit_tries
)
353 DBG1(DBG_IKE
, "giving up after %u retransmits", retransmitted
- 1);
354 charon
->bus
->alert(charon
->bus
, ALERT_RETRANSMIT_SEND_TIMEOUT
, packet
);
357 t
= (u_int32_t
)(this->retransmit_timeout
* 1000.0 *
358 pow(this->retransmit_base
, retransmitted
));
361 DBG1(DBG_IKE
, "sending retransmit %u of %s message ID %u, seq %u",
362 retransmitted
, seqnr
< RESPONDING_SEQ
? "request" : "response",
363 mid
, seqnr
< RESPONDING_SEQ
? seqnr
: seqnr
- RESPONDING_SEQ
);
364 charon
->bus
->alert(charon
->bus
, ALERT_RETRANSMIT_SEND
, packet
);
366 send_packets(this, packets
);
367 lib
->scheduler
->schedule_job_ms(lib
->scheduler
, (job_t
*)
368 retransmit_job_create(seqnr
, this->ike_sa
->get_id(this->ike_sa
)), t
);
372 METHOD(task_manager_t
, retransmit
, status_t
,
373 private_task_manager_t
*this, u_int32_t seqnr
)
375 status_t status
= SUCCESS
;
377 if (seqnr
== this->initiating
.seqnr
&&
378 array_count(this->initiating
.packets
))
380 status
= retransmit_packet(this, seqnr
, this->initiating
.mid
,
381 this->initiating
.retransmitted
, this->initiating
.packets
);
382 if (status
== NEED_MORE
)
384 this->initiating
.retransmitted
++;
388 if (seqnr
== this->responding
.seqnr
&&
389 array_count(this->responding
.packets
))
391 status
= retransmit_packet(this, seqnr
, this->responding
.mid
,
392 this->responding
.retransmitted
, this->responding
.packets
);
393 if (status
== NEED_MORE
)
395 this->responding
.retransmitted
++;
403 * Check if we have to wait for a mode config before starting a quick mode
405 static bool mode_config_expected(private_task_manager_t
*this)
407 enumerator_t
*enumerator
;
408 peer_cfg_t
*peer_cfg
;
413 peer_cfg
= this->ike_sa
->get_peer_cfg(this->ike_sa
);
416 if (peer_cfg
->use_pull_mode(peer_cfg
))
418 enumerator
= peer_cfg
->create_pool_enumerator(peer_cfg
);
419 if (!enumerator
->enumerate(enumerator
, &pool
))
420 { /* no pool configured */
421 enumerator
->destroy(enumerator
);
424 enumerator
->destroy(enumerator
);
430 enumerator
= peer_cfg
->create_virtual_ip_enumerator(peer_cfg
);
431 if (!enumerator
->enumerate(enumerator
, &host
))
432 { /* not requesting a vip */
433 enumerator
->destroy(enumerator
);
436 enumerator
->destroy(enumerator
);
440 enumerator
= this->ike_sa
->create_virtual_ip_enumerator(this->ike_sa
,
442 if (!enumerator
->enumerate(enumerator
, &host
))
443 { /* expecting a VIP exchange, but no VIP assigned yet */
444 enumerator
->destroy(enumerator
);
447 enumerator
->destroy(enumerator
);
452 METHOD(task_manager_t
, initiate
, status_t
,
453 private_task_manager_t
*this)
455 enumerator_t
*enumerator
;
459 exchange_type_t exchange
= EXCHANGE_TYPE_UNDEFINED
;
460 bool new_mid
= FALSE
, expect_response
= FALSE
, cancelled
= FALSE
, keep
= FALSE
;
462 if (this->initiating
.type
!= EXCHANGE_TYPE_UNDEFINED
&&
463 this->initiating
.type
!= INFORMATIONAL_V1
)
465 DBG2(DBG_IKE
, "delaying task initiation, %N exchange in progress",
466 exchange_type_names
, this->initiating
.type
);
467 /* do not initiate if we already have a message in the air */
471 if (this->active_tasks
->get_count(this->active_tasks
) == 0)
473 DBG2(DBG_IKE
, "activating new tasks");
474 switch (this->ike_sa
->get_state(this->ike_sa
))
477 activate_task(this, TASK_ISAKMP_VENDOR
);
478 activate_task(this, TASK_ISAKMP_CERT_PRE
);
479 if (activate_task(this, TASK_MAIN_MODE
))
483 else if (activate_task(this, TASK_AGGRESSIVE_MODE
))
485 exchange
= AGGRESSIVE
;
487 activate_task(this, TASK_ISAKMP_CERT_POST
);
488 activate_task(this, TASK_ISAKMP_NATD
);
491 if (activate_task(this, TASK_ISAKMP_DELETE
))
493 exchange
= INFORMATIONAL_V1
;
497 if (activate_task(this, TASK_XAUTH
))
499 exchange
= TRANSACTION
;
503 if (activate_task(this, TASK_INFORMATIONAL
))
505 exchange
= INFORMATIONAL_V1
;
510 case IKE_ESTABLISHED
:
511 if (activate_task(this, TASK_MODE_CONFIG
))
513 exchange
= TRANSACTION
;
517 if (!mode_config_expected(this) &&
518 activate_task(this, TASK_QUICK_MODE
))
520 exchange
= QUICK_MODE
;
524 if (activate_task(this, TASK_INFORMATIONAL
))
526 exchange
= INFORMATIONAL_V1
;
530 if (activate_task(this, TASK_QUICK_DELETE
))
532 exchange
= INFORMATIONAL_V1
;
536 if (activate_task(this, TASK_ISAKMP_DELETE
))
538 exchange
= INFORMATIONAL_V1
;
542 if (activate_task(this, TASK_ISAKMP_DPD
))
544 exchange
= INFORMATIONAL_V1
;
555 DBG2(DBG_IKE
, "reinitiating already active tasks");
556 enumerator
= this->active_tasks
->create_enumerator(this->active_tasks
);
557 while (enumerator
->enumerate(enumerator
, (void**)&task
))
559 DBG2(DBG_IKE
, " %N task", task_type_names
, task
->get_type(task
));
560 switch (task
->get_type(task
))
565 case TASK_AGGRESSIVE_MODE
:
566 exchange
= AGGRESSIVE
;
568 case TASK_QUICK_MODE
:
569 exchange
= QUICK_MODE
;
572 exchange
= TRANSACTION
;
580 enumerator
->destroy(enumerator
);
583 if (exchange
== EXCHANGE_TYPE_UNDEFINED
)
585 DBG2(DBG_IKE
, "nothing to initiate");
586 /* nothing to do yet... */
590 me
= this->ike_sa
->get_my_host(this->ike_sa
);
591 other
= this->ike_sa
->get_other_host(this->ike_sa
);
595 if (!this->rng
->get_bytes(this->rng
, sizeof(this->initiating
.mid
),
596 (void*)&this->initiating
.mid
))
598 DBG1(DBG_IKE
, "failed to allocate message ID, destroying IKE_SA");
603 message
= message_create(IKEV1_MAJOR_VERSION
, IKEV1_MINOR_VERSION
);
604 message
->set_message_id(message
, this->initiating
.mid
);
605 message
->set_source(message
, me
->clone(me
));
606 message
->set_destination(message
, other
->clone(other
));
607 message
->set_exchange_type(message
, exchange
);
608 this->initiating
.type
= exchange
;
609 this->initiating
.retransmitted
= 0;
611 enumerator
= this->active_tasks
->create_enumerator(this->active_tasks
);
612 while (enumerator
->enumerate(enumerator
, (void*)&task
))
614 switch (task
->build(task
, message
))
617 /* task completed, remove it */
618 this->active_tasks
->remove_at(this->active_tasks
, enumerator
);
619 if (task
->get_type(task
) == TASK_AGGRESSIVE_MODE
||
620 task
->get_type(task
) == TASK_QUICK_MODE
)
621 { /* last message of three message exchange */
627 expect_response
= TRUE
;
628 /* processed, but task needs another exchange */
635 if (this->ike_sa
->get_state(this->ike_sa
) != IKE_CONNECTING
)
637 charon
->bus
->ike_updown(charon
->bus
, this->ike_sa
, FALSE
);
641 /* critical failure, destroy IKE_SA */
642 enumerator
->destroy(enumerator
);
643 message
->destroy(message
);
649 enumerator
->destroy(enumerator
);
651 if (this->active_tasks
->get_count(this->active_tasks
) == 0 &&
652 (exchange
== QUICK_MODE
|| exchange
== AGGRESSIVE
))
653 { /* tasks completed, no exchange active anymore */
654 this->initiating
.type
= EXCHANGE_TYPE_UNDEFINED
;
658 message
->destroy(message
);
659 return initiate(this);
662 clear_packets(this->initiating
.packets
);
663 if (!generate_message(this, message
, &this->initiating
.packets
))
665 /* message generation failed. There is nothing more to do than to
667 message
->destroy(message
);
669 charon
->bus
->ike_updown(charon
->bus
, this->ike_sa
, FALSE
);
673 this->initiating
.seqnr
++;
676 message
->destroy(message
);
677 return retransmit(this, this->initiating
.seqnr
);
680 { /* keep the packet for retransmission, the responder might request it */
681 send_packets(this, this->initiating
.packets
);
685 send_packets(this, this->initiating
.packets
);
686 clear_packets(this->initiating
.packets
);
688 message
->destroy(message
);
690 if (exchange
== INFORMATIONAL_V1
)
692 switch (this->ike_sa
->get_state(this->ike_sa
))
695 /* close after sending an INFORMATIONAL when unestablished */
698 /* close after sending a DELETE */
704 return initiate(this);
708 * build a response depending on the "passive" task list
710 static status_t
build_response(private_task_manager_t
*this, message_t
*request
)
712 enumerator_t
*enumerator
;
716 bool delete = FALSE
, cancelled
= FALSE
, expect_request
= FALSE
;
718 me
= request
->get_destination(request
);
719 other
= request
->get_source(request
);
721 message
= message_create(IKEV1_MAJOR_VERSION
, IKEV1_MINOR_VERSION
);
722 message
->set_exchange_type(message
, request
->get_exchange_type(request
));
723 /* send response along the path the request came in */
724 message
->set_source(message
, me
->clone(me
));
725 message
->set_destination(message
, other
->clone(other
));
726 message
->set_message_id(message
, request
->get_message_id(request
));
727 message
->set_request(message
, FALSE
);
729 this->responding
.mid
= request
->get_message_id(request
);
730 this->responding
.retransmitted
= 0;
731 this->responding
.seqnr
++;
733 enumerator
= this->passive_tasks
->create_enumerator(this->passive_tasks
);
734 while (enumerator
->enumerate(enumerator
, (void*)&task
))
736 switch (task
->build(task
, message
))
739 /* task completed, remove it */
740 this->passive_tasks
->remove_at(this->passive_tasks
, enumerator
);
744 /* processed, but task needs another exchange */
745 if (task
->get_type(task
) == TASK_QUICK_MODE
||
746 task
->get_type(task
) == TASK_AGGRESSIVE_MODE
)
747 { /* we rely on initiator retransmission, except for
748 * three-message exchanges */
749 expect_request
= TRUE
;
756 if (task
->get_type(task
) == TASK_QUICK_MODE
)
757 { /* not responsible for this exchange */
763 charon
->bus
->ike_updown(charon
->bus
, this->ike_sa
, FALSE
);
766 /* destroy IKE_SA, but SEND response first */
772 enumerator
->destroy(enumerator
);
774 clear_packets(this->responding
.packets
);
777 message
->destroy(message
);
778 return initiate(this);
780 if (!generate_message(this, message
, &this->responding
.packets
))
782 message
->destroy(message
);
783 charon
->bus
->ike_updown(charon
->bus
, this->ike_sa
, FALSE
);
786 message
->destroy(message
);
788 if (expect_request
&& !delete)
790 return retransmit(this, this->responding
.seqnr
);
792 send_packets(this, this->responding
.packets
);
801 * Send a notify in a separate INFORMATIONAL exchange back to the sender.
802 * The notify protocol_id is set to ISAKMP
804 static void send_notify(private_task_manager_t
*this, message_t
*request
,
808 array_t
*packets
= NULL
;
812 if (request
->get_exchange_type(request
) == INFORMATIONAL_V1
)
813 { /* don't respond to INFORMATIONAL requests to avoid a notify war */
814 DBG1(DBG_IKE
, "ignore malformed INFORMATIONAL request");
817 if (!this->rng
->get_bytes(this->rng
, sizeof(mid
), (void*)&mid
))
819 DBG1(DBG_IKE
, "failed to allocate message ID");
822 response
= message_create(IKEV1_MAJOR_VERSION
, IKEV1_MINOR_VERSION
);
823 response
->set_exchange_type(response
, INFORMATIONAL_V1
);
824 response
->set_request(response
, TRUE
);
825 response
->set_message_id(response
, mid
);
826 response
->add_payload(response
, (payload_t
*)
827 notify_payload_create_from_protocol_and_type(PLV1_NOTIFY
,
830 me
= this->ike_sa
->get_my_host(this->ike_sa
);
831 if (me
->is_anyaddr(me
))
833 me
= request
->get_destination(request
);
834 this->ike_sa
->set_my_host(this->ike_sa
, me
->clone(me
));
836 other
= this->ike_sa
->get_other_host(this->ike_sa
);
837 if (other
->is_anyaddr(other
))
839 other
= request
->get_source(request
);
840 this->ike_sa
->set_other_host(this->ike_sa
, other
->clone(other
));
842 response
->set_source(response
, me
->clone(me
));
843 response
->set_destination(response
, other
->clone(other
));
844 if (generate_message(this, response
, &packets
))
846 send_packets(this, packets
);
848 clear_packets(packets
);
849 array_destroy(packets
);
850 response
->destroy(response
);
854 * Process a DPD request/response
856 static bool process_dpd(private_task_manager_t
*this, message_t
*message
)
858 notify_payload_t
*notify
;
863 type
= DPD_R_U_THERE
;
864 notify
= message
->get_notify(message
, type
);
867 type
= DPD_R_U_THERE_ACK
;
868 notify
= message
->get_notify(message
, type
);
874 data
= notify
->get_notification_data(notify
);
879 seq
= untoh32(data
.ptr
);
881 if (type
== DPD_R_U_THERE
)
883 if (this->dpd_recv
== 0 || seq
== this->dpd_recv
)
884 { /* check sequence validity */
885 this->dpd_recv
= seq
+ 1;
886 this->ike_sa
->set_statistic(this->ike_sa
, STAT_INBOUND
,
887 time_monotonic(NULL
));
889 /* but respond anyway */
890 this->ike_sa
->queue_task(this->ike_sa
,
891 &isakmp_dpd_create(this->ike_sa
, DPD_R_U_THERE_ACK
, seq
)->task
);
893 else /* DPD_R_U_THERE_ACK */
895 if (seq
== this->dpd_send
- 1)
897 this->ike_sa
->set_statistic(this->ike_sa
, STAT_INBOUND
,
898 time_monotonic(NULL
));
902 DBG1(DBG_IKE
, "received invalid DPD sequence number %u "
903 "(expected %u), ignored", seq
, this->dpd_send
- 1);
910 * Check if we already have a quick mode task queued for the exchange with the
913 static bool have_quick_mode_task(private_task_manager_t
*this, u_int32_t mid
)
915 enumerator_t
*enumerator
;
920 enumerator
= this->passive_tasks
->create_enumerator(this->passive_tasks
);
921 while (enumerator
->enumerate(enumerator
, &task
))
923 if (task
->get_type(task
) == TASK_QUICK_MODE
)
925 qm
= (quick_mode_t
*)task
;
926 if (qm
->get_mid(qm
) == mid
)
933 enumerator
->destroy(enumerator
);
938 * Check if we still have an aggressive mode task queued
940 static bool have_aggressive_mode_task(private_task_manager_t
*this)
942 enumerator_t
*enumerator
;
946 enumerator
= this->passive_tasks
->create_enumerator(this->passive_tasks
);
947 while (enumerator
->enumerate(enumerator
, &task
))
949 if (task
->get_type(task
) == TASK_AGGRESSIVE_MODE
)
955 enumerator
->destroy(enumerator
);
960 * handle an incoming request message
962 static status_t
process_request(private_task_manager_t
*this,
965 enumerator_t
*enumerator
;
967 bool send_response
= FALSE
, dpd
= FALSE
;
969 if (message
->get_exchange_type(message
) == INFORMATIONAL_V1
||
970 message
->get_exchange_type(message
) == QUICK_MODE
||
971 this->passive_tasks
->get_count(this->passive_tasks
) == 0)
972 { /* create tasks depending on request type, if not already some queued */
973 switch (message
->get_exchange_type(message
))
976 task
= (task_t
*)isakmp_vendor_create(this->ike_sa
, FALSE
);
977 this->passive_tasks
->insert_last(this->passive_tasks
, task
);
978 task
= (task_t
*)isakmp_cert_pre_create(this->ike_sa
, FALSE
);
979 this->passive_tasks
->insert_last(this->passive_tasks
, task
);
980 task
= (task_t
*)main_mode_create(this->ike_sa
, FALSE
);
981 this->passive_tasks
->insert_last(this->passive_tasks
, task
);
982 task
= (task_t
*)isakmp_cert_post_create(this->ike_sa
, FALSE
);
983 this->passive_tasks
->insert_last(this->passive_tasks
, task
);
984 task
= (task_t
*)isakmp_natd_create(this->ike_sa
, FALSE
);
985 this->passive_tasks
->insert_last(this->passive_tasks
, task
);
988 task
= (task_t
*)isakmp_vendor_create(this->ike_sa
, FALSE
);
989 this->passive_tasks
->insert_last(this->passive_tasks
, task
);
990 task
= (task_t
*)isakmp_cert_pre_create(this->ike_sa
, FALSE
);
991 this->passive_tasks
->insert_last(this->passive_tasks
, task
);
992 task
= (task_t
*)aggressive_mode_create(this->ike_sa
, FALSE
);
993 this->passive_tasks
->insert_last(this->passive_tasks
, task
);
994 task
= (task_t
*)isakmp_cert_post_create(this->ike_sa
, FALSE
);
995 this->passive_tasks
->insert_last(this->passive_tasks
, task
);
996 task
= (task_t
*)isakmp_natd_create(this->ike_sa
, FALSE
);
997 this->passive_tasks
->insert_last(this->passive_tasks
, task
);
1000 if (this->ike_sa
->get_state(this->ike_sa
) != IKE_ESTABLISHED
)
1002 DBG1(DBG_IKE
, "received quick mode request for "
1003 "unestablished IKE_SA, ignored");
1006 if (have_quick_mode_task(this, message
->get_message_id(message
)))
1010 task
= (task_t
*)quick_mode_create(this->ike_sa
, NULL
,
1012 this->passive_tasks
->insert_last(this->passive_tasks
, task
);
1014 case INFORMATIONAL_V1
:
1015 if (process_dpd(this, message
))
1021 task
= (task_t
*)informational_create(this->ike_sa
, NULL
);
1022 this->passive_tasks
->insert_first(this->passive_tasks
, task
);
1026 if (this->ike_sa
->get_state(this->ike_sa
) != IKE_CONNECTING
)
1028 task
= (task_t
*)mode_config_create(this->ike_sa
,
1033 task
= (task_t
*)xauth_create(this->ike_sa
, FALSE
);
1035 this->passive_tasks
->insert_last(this->passive_tasks
, task
);
1043 return initiate(this);
1045 this->ike_sa
->set_statistic(this->ike_sa
, STAT_INBOUND
, time_monotonic(NULL
));
1047 /* let the tasks process the message */
1048 enumerator
= this->passive_tasks
->create_enumerator(this->passive_tasks
);
1049 while (enumerator
->enumerate(enumerator
, (void*)&task
))
1051 switch (task
->process(task
, message
))
1054 /* task completed, remove it */
1055 this->passive_tasks
->remove_at(this->passive_tasks
, enumerator
);
1056 task
->destroy(task
);
1059 /* processed, but task needs at least another call to build() */
1060 send_response
= TRUE
;
1063 send_response
= FALSE
;
1066 if (task
->get_type(task
) == TASK_QUICK_MODE
)
1067 { /* not responsible for this exchange */
1073 charon
->bus
->ike_updown(charon
->bus
, this->ike_sa
, FALSE
);
1076 /* critical failure, destroy IKE_SA */
1077 this->passive_tasks
->remove_at(this->passive_tasks
, enumerator
);
1078 enumerator
->destroy(enumerator
);
1079 task
->destroy(task
);
1084 enumerator
->destroy(enumerator
);
1088 if (build_response(this, message
) != SUCCESS
)
1094 { /* We don't send a response, so don't retransmit one if we get
1095 * the same message again. */
1096 clear_packets(this->responding
.packets
);
1098 if (this->passive_tasks
->get_count(this->passive_tasks
) == 0 &&
1099 this->queued_tasks
->get_count(this->queued_tasks
) > 0)
1101 /* passive tasks completed, check if an active task has been queued,
1102 * such as XAUTH or modeconfig push */
1103 return initiate(this);
1109 * handle an incoming response message
1111 static status_t
process_response(private_task_manager_t
*this,
1114 enumerator_t
*enumerator
;
1119 if (message
->get_exchange_type(message
) != this->initiating
.type
)
1121 /* Windows server sends a fourth quick mode message having an initial
1122 * contact notify. Ignore this message for compatibility. */
1123 if (this->initiating
.type
== EXCHANGE_TYPE_UNDEFINED
&&
1124 message
->get_exchange_type(message
) == QUICK_MODE
&&
1125 message
->get_notify(message
, INITIAL_CONTACT
))
1127 DBG1(DBG_IKE
, "ignoring fourth Quick Mode message");
1130 DBG1(DBG_IKE
, "received %N response, but expected %N",
1131 exchange_type_names
, message
->get_exchange_type(message
),
1132 exchange_type_names
, this->initiating
.type
);
1133 charon
->bus
->ike_updown(charon
->bus
, this->ike_sa
, FALSE
);
1137 enumerator
= this->active_tasks
->create_enumerator(this->active_tasks
);
1138 while (enumerator
->enumerate(enumerator
, (void*)&task
))
1140 switch (task
->process(task
, message
))
1143 /* task completed, remove it */
1144 this->active_tasks
->remove_at(this->active_tasks
, enumerator
);
1145 task
->destroy(task
);
1148 /* processed, but task needs another exchange */
1154 charon
->bus
->ike_updown(charon
->bus
, this->ike_sa
, FALSE
);
1157 /* critical failure, destroy IKE_SA */
1158 this->active_tasks
->remove_at(this->active_tasks
, enumerator
);
1159 enumerator
->destroy(enumerator
);
1160 task
->destroy(task
);
1165 enumerator
->destroy(enumerator
);
1167 this->initiating
.type
= EXCHANGE_TYPE_UNDEFINED
;
1168 clear_packets(this->initiating
.packets
);
1170 if (this->queued
&& this->active_tasks
->get_count(this->active_tasks
) == 0)
1172 queued
= this->queued
;
1173 this->queued
= NULL
;
1174 status
= this->public.task_manager
.process_message(
1175 &this->public.task_manager
, queued
);
1176 queued
->destroy(queued
);
1177 if (status
== DESTROY_ME
)
1183 return initiate(this);
1186 static status_t
handle_fragment(private_task_manager_t
*this, message_t
*msg
)
1192 this->defrag
= message_create_defrag(msg
);
1198 status
= this->defrag
->add_fragment(this->defrag
, msg
);
1199 if (status
== SUCCESS
)
1201 lib
->processor
->queue_job(lib
->processor
,
1202 (job_t
*)process_message_job_create(this->defrag
));
1203 this->defrag
= NULL
;
1204 /* do not process the last fragment */
1211 * Parse the given message and verify that it is valid.
1213 static status_t
parse_message(private_task_manager_t
*this, message_t
*msg
)
1217 status
= msg
->parse_body(msg
, this->ike_sa
->get_keymat(this->ike_sa
));
1219 if (status
!= SUCCESS
)
1224 DBG1(DBG_IKE
, "unsupported exchange type");
1225 send_notify(this, msg
, INVALID_EXCHANGE_TYPE
);
1228 DBG1(DBG_IKE
, "message parsing failed");
1229 send_notify(this, msg
, PAYLOAD_MALFORMED
);
1232 DBG1(DBG_IKE
, "message verification failed");
1233 send_notify(this, msg
, PAYLOAD_MALFORMED
);
1236 DBG1(DBG_IKE
, "integrity check failed");
1237 send_notify(this, msg
, INVALID_HASH_INFORMATION
);
1240 DBG1(DBG_IKE
, "found encrypted message, but no keys available");
1241 send_notify(this, msg
, PAYLOAD_MALFORMED
);
1245 DBG1(DBG_IKE
, "%N %s with message ID %u processing failed",
1246 exchange_type_names
, msg
->get_exchange_type(msg
),
1247 msg
->get_request(msg
) ? "request" : "response",
1248 msg
->get_message_id(msg
));
1250 charon
->bus
->alert(charon
->bus
, ALERT_PARSE_ERROR_BODY
, msg
, status
);
1252 if (this->ike_sa
->get_state(this->ike_sa
) == IKE_CREATED
)
1253 { /* invalid initiation attempt, close SA */
1258 if (msg
->get_first_payload_type(msg
) == PLV1_FRAGMENT
)
1260 return handle_fragment(this, msg
);
1266 * Queue the given message if possible
1268 static status_t
queue_message(private_task_manager_t
*this, message_t
*msg
)
1272 DBG1(DBG_IKE
, "ignoring %N request, queue full",
1273 exchange_type_names
, msg
->get_exchange_type(msg
));
1276 this->queued
= message_create_from_packet(msg
->get_packet(msg
));
1277 if (this->queued
->parse_header(this->queued
) != SUCCESS
)
1279 this->queued
->destroy(this->queued
);
1280 this->queued
= NULL
;
1283 DBG1(DBG_IKE
, "queueing %N request as tasks still active",
1284 exchange_type_names
, msg
->get_exchange_type(msg
));
1288 METHOD(task_manager_t
, process_message
, status_t
,
1289 private_task_manager_t
*this, message_t
*msg
)
1291 u_int32_t hash
, mid
, i
;
1295 /* TODO-IKEv1: update hosts more selectively */
1296 me
= msg
->get_destination(msg
);
1297 other
= msg
->get_source(msg
);
1298 mid
= msg
->get_message_id(msg
);
1299 hash
= chunk_hash(msg
->get_packet_data(msg
));
1300 for (i
= 0; i
< MAX_OLD_HASHES
; i
++)
1302 if (this->initiating
.old_hashes
[i
] == hash
)
1304 if (array_count(this->initiating
.packets
) &&
1305 i
== (this->initiating
.old_hash_pos
% MAX_OLD_HASHES
) &&
1306 (msg
->get_exchange_type(msg
) == QUICK_MODE
||
1307 msg
->get_exchange_type(msg
) == AGGRESSIVE
))
1309 DBG1(DBG_IKE
, "received retransmit of response with ID %u, "
1310 "resending last request", mid
);
1311 send_packets(this, this->initiating
.packets
);
1314 DBG1(DBG_IKE
, "received retransmit of response with ID %u, "
1315 "but next request already sent", mid
);
1320 if ((mid
&& mid
== this->initiating
.mid
) ||
1321 (this->initiating
.mid
== 0 &&
1322 msg
->get_exchange_type(msg
) == this->initiating
.type
&&
1323 this->active_tasks
->get_count(this->active_tasks
)))
1325 msg
->set_request(msg
, FALSE
);
1326 charon
->bus
->message(charon
->bus
, msg
, TRUE
, FALSE
);
1327 status
= parse_message(this, msg
);
1328 if (status
== NEED_MORE
)
1332 if (status
!= SUCCESS
)
1336 this->ike_sa
->set_statistic(this->ike_sa
, STAT_INBOUND
,
1337 time_monotonic(NULL
));
1338 this->ike_sa
->update_hosts(this->ike_sa
, me
, other
, TRUE
);
1339 charon
->bus
->message(charon
->bus
, msg
, TRUE
, TRUE
);
1340 if (process_response(this, msg
) != SUCCESS
)
1345 this->initiating
.old_hashes
[(++this->initiating
.old_hash_pos
) %
1346 MAX_OLD_HASHES
] = hash
;
1350 if (hash
== this->responding
.hash
)
1352 if (array_count(this->responding
.packets
))
1354 DBG1(DBG_IKE
, "received retransmit of request with ID %u, "
1355 "retransmitting response", mid
);
1356 send_packets(this, this->responding
.packets
);
1358 else if (array_count(this->initiating
.packets
) &&
1359 this->initiating
.type
== INFORMATIONAL_V1
)
1361 DBG1(DBG_IKE
, "received retransmit of DPD request, "
1362 "retransmitting response");
1363 send_packets(this, this->initiating
.packets
);
1367 DBG1(DBG_IKE
, "received retransmit of request with ID %u, "
1368 "but no response to retransmit", mid
);
1370 charon
->bus
->alert(charon
->bus
, ALERT_RETRANSMIT_RECEIVE
, msg
);
1374 /* reject Main/Aggressive Modes once established */
1375 if (msg
->get_exchange_type(msg
) == ID_PROT
||
1376 msg
->get_exchange_type(msg
) == AGGRESSIVE
)
1378 if (this->ike_sa
->get_state(this->ike_sa
) != IKE_CREATED
&&
1379 this->ike_sa
->get_state(this->ike_sa
) != IKE_CONNECTING
&&
1380 msg
->get_first_payload_type(msg
) != PLV1_FRAGMENT
)
1382 DBG1(DBG_IKE
, "ignoring %N in established IKE_SA state",
1383 exchange_type_names
, msg
->get_exchange_type(msg
));
1388 /* drop XAuth/Mode Config/Quick Mode messages until we received the last
1389 * Aggressive Mode message */
1390 if (have_aggressive_mode_task(this) &&
1391 msg
->get_exchange_type(msg
) != AGGRESSIVE
)
1393 DBG1(DBG_IKE
, "ignoring %N request while phase 1 is incomplete",
1394 exchange_type_names
, msg
->get_exchange_type(msg
));
1398 /* queue XAuth/Mode Config messages unless the Main Mode exchange we
1399 * initiated is complete */
1400 if (msg
->get_exchange_type(msg
) == TRANSACTION
&&
1401 this->active_tasks
->get_count(this->active_tasks
))
1403 return queue_message(this, msg
);
1406 msg
->set_request(msg
, TRUE
);
1407 charon
->bus
->message(charon
->bus
, msg
, TRUE
, FALSE
);
1408 status
= parse_message(this, msg
);
1409 if (status
== NEED_MORE
)
1413 if (status
!= SUCCESS
)
1417 /* if this IKE_SA is virgin, we check for a config */
1418 if (this->ike_sa
->get_ike_cfg(this->ike_sa
) == NULL
)
1420 ike_sa_id_t
*ike_sa_id
;
1424 ike_cfg
= charon
->backends
->get_ike_cfg(charon
->backends
,
1426 if (ike_cfg
== NULL
)
1428 /* no config found for these hosts, destroy */
1429 DBG1(DBG_IKE
, "no IKE config found for %H...%H, sending %N",
1430 me
, other
, notify_type_names
, NO_PROPOSAL_CHOSEN
);
1431 send_notify(this, msg
, NO_PROPOSAL_CHOSEN
);
1434 this->ike_sa
->set_ike_cfg(this->ike_sa
, ike_cfg
);
1435 ike_cfg
->destroy(ike_cfg
);
1436 /* add a timeout if peer does not establish it completely */
1437 ike_sa_id
= this->ike_sa
->get_id(this->ike_sa
);
1438 job
= (job_t
*)delete_ike_sa_job_create(ike_sa_id
, FALSE
);
1439 lib
->scheduler
->schedule_job(lib
->scheduler
, job
,
1440 lib
->settings
->get_int(lib
->settings
,
1441 "%s.half_open_timeout", HALF_OPEN_IKE_SA_TIMEOUT
,
1444 this->ike_sa
->update_hosts(this->ike_sa
, me
, other
, TRUE
);
1445 charon
->bus
->message(charon
->bus
, msg
, TRUE
, TRUE
);
1446 if (process_request(this, msg
) != SUCCESS
)
1451 this->responding
.hash
= hash
;
1457 * Check if a given task has been queued already
1459 static bool has_queued(private_task_manager_t
*this, task_type_t type
)
1461 enumerator_t
*enumerator
;
1465 enumerator
= this->queued_tasks
->create_enumerator(this->queued_tasks
);
1466 while (enumerator
->enumerate(enumerator
, &task
))
1468 if (task
->get_type(task
) == type
)
1474 enumerator
->destroy(enumerator
);
1478 METHOD(task_manager_t
, queue_task
, void,
1479 private_task_manager_t
*this, task_t
*task
)
1481 task_type_t type
= task
->get_type(task
);
1485 case TASK_MODE_CONFIG
:
1487 if (has_queued(this, type
))
1489 task
->destroy(task
);
1496 DBG2(DBG_IKE
, "queueing %N task", task_type_names
, task
->get_type(task
));
1497 this->queued_tasks
->insert_last(this->queued_tasks
, task
);
1500 METHOD(task_manager_t
, queue_ike
, void,
1501 private_task_manager_t
*this)
1503 peer_cfg_t
*peer_cfg
;
1505 if (!has_queued(this, TASK_ISAKMP_VENDOR
))
1507 queue_task(this, (task_t
*)isakmp_vendor_create(this->ike_sa
, TRUE
));
1509 if (!has_queued(this, TASK_ISAKMP_CERT_PRE
))
1511 queue_task(this, (task_t
*)isakmp_cert_pre_create(this->ike_sa
, TRUE
));
1513 peer_cfg
= this->ike_sa
->get_peer_cfg(this->ike_sa
);
1514 if (peer_cfg
->use_aggressive(peer_cfg
))
1516 if (!has_queued(this, TASK_AGGRESSIVE_MODE
))
1518 queue_task(this, (task_t
*)aggressive_mode_create(this->ike_sa
, TRUE
));
1523 if (!has_queued(this, TASK_MAIN_MODE
))
1525 queue_task(this, (task_t
*)main_mode_create(this->ike_sa
, TRUE
));
1528 if (!has_queued(this, TASK_ISAKMP_CERT_POST
))
1530 queue_task(this, (task_t
*)isakmp_cert_post_create(this->ike_sa
, TRUE
));
1532 if (!has_queued(this, TASK_ISAKMP_NATD
))
1534 queue_task(this, (task_t
*)isakmp_natd_create(this->ike_sa
, TRUE
));
1538 METHOD(task_manager_t
, queue_ike_reauth
, void,
1539 private_task_manager_t
*this)
1541 enumerator_t
*enumerator
;
1542 child_sa_t
*child_sa
;
1546 new = charon
->ike_sa_manager
->checkout_new(charon
->ike_sa_manager
,
1547 this->ike_sa
->get_version(this->ike_sa
), TRUE
);
1549 { /* shouldn't happen */
1553 new->set_peer_cfg(new, this->ike_sa
->get_peer_cfg(this->ike_sa
));
1554 host
= this->ike_sa
->get_other_host(this->ike_sa
);
1555 new->set_other_host(new, host
->clone(host
));
1556 host
= this->ike_sa
->get_my_host(this->ike_sa
);
1557 new->set_my_host(new, host
->clone(host
));
1558 enumerator
= this->ike_sa
->create_virtual_ip_enumerator(this->ike_sa
, TRUE
);
1559 while (enumerator
->enumerate(enumerator
, &host
))
1561 new->add_virtual_ip(new, TRUE
, host
);
1563 enumerator
->destroy(enumerator
);
1565 charon
->bus
->children_migrate(charon
->bus
, new->get_id(new),
1566 new->get_unique_id(new));
1567 enumerator
= this->ike_sa
->create_child_sa_enumerator(this->ike_sa
);
1568 while (enumerator
->enumerate(enumerator
, &child_sa
))
1570 this->ike_sa
->remove_child_sa(this->ike_sa
, enumerator
);
1571 new->add_child_sa(new, child_sa
);
1573 enumerator
->destroy(enumerator
);
1574 charon
->bus
->set_sa(charon
->bus
, new);
1575 charon
->bus
->children_migrate(charon
->bus
, NULL
, 0);
1576 charon
->bus
->set_sa(charon
->bus
, this->ike_sa
);
1578 if (!new->get_child_count(new))
1579 { /* check if a Quick Mode task is queued (UNITY_LOAD_BALANCE case) */
1582 enumerator
= this->queued_tasks
->create_enumerator(this->queued_tasks
);
1583 while (enumerator
->enumerate(enumerator
, &task
))
1585 if (task
->get_type(task
) == TASK_QUICK_MODE
)
1587 this->queued_tasks
->remove_at(this->queued_tasks
, enumerator
);
1588 task
->migrate(task
, new);
1589 new->queue_task(new, task
);
1592 enumerator
->destroy(enumerator
);
1595 if (new->initiate(new, NULL
, 0, NULL
, NULL
) != DESTROY_ME
)
1597 charon
->ike_sa_manager
->checkin(charon
->ike_sa_manager
, new);
1598 this->ike_sa
->set_state(this->ike_sa
, IKE_REKEYING
);
1602 charon
->ike_sa_manager
->checkin_and_destroy(charon
->ike_sa_manager
, new);
1603 DBG1(DBG_IKE
, "reauthenticating IKE_SA failed");
1605 charon
->bus
->set_sa(charon
->bus
, this->ike_sa
);
1608 METHOD(task_manager_t
, queue_ike_rekey
, void,
1609 private_task_manager_t
*this)
1611 queue_ike_reauth(this);
1614 METHOD(task_manager_t
, queue_ike_delete
, void,
1615 private_task_manager_t
*this)
1617 enumerator_t
*enumerator
;
1618 child_sa_t
*child_sa
;
1620 enumerator
= this->ike_sa
->create_child_sa_enumerator(this->ike_sa
);
1621 while (enumerator
->enumerate(enumerator
, &child_sa
))
1623 queue_task(this, (task_t
*)
1624 quick_delete_create(this->ike_sa
, child_sa
->get_protocol(child_sa
),
1625 child_sa
->get_spi(child_sa
, TRUE
), FALSE
, FALSE
));
1627 enumerator
->destroy(enumerator
);
1629 queue_task(this, (task_t
*)isakmp_delete_create(this->ike_sa
, TRUE
));
1632 METHOD(task_manager_t
, queue_mobike
, void,
1633 private_task_manager_t
*this, bool roam
, bool address
)
1635 /* Not supported in IKEv1 */
1638 METHOD(task_manager_t
, queue_child
, void,
1639 private_task_manager_t
*this, child_cfg_t
*cfg
, u_int32_t reqid
,
1640 traffic_selector_t
*tsi
, traffic_selector_t
*tsr
)
1644 task
= quick_mode_create(this->ike_sa
, cfg
, tsi
, tsr
);
1645 task
->use_reqid(task
, reqid
);
1647 queue_task(this, &task
->task
);
1651 * Check if two CHILD_SAs have the same traffic selector
1653 static bool have_equal_ts(child_sa_t
*child1
, child_sa_t
*child2
, bool local
)
1655 enumerator_t
*e1
, *e2
;
1656 traffic_selector_t
*ts1
, *ts2
;
1659 e1
= child1
->create_ts_enumerator(child1
, local
);
1660 e2
= child2
->create_ts_enumerator(child2
, local
);
1661 if (e1
->enumerate(e1
, &ts1
) && e2
->enumerate(e2
, &ts2
))
1663 equal
= ts1
->equals(ts1
, ts2
);
1672 * Check if a CHILD_SA is redundant and we should delete instead of rekey
1674 static bool is_redundant(private_task_manager_t
*this, child_sa_t
*child_sa
)
1676 enumerator_t
*enumerator
;
1677 child_sa_t
*current
;
1678 bool redundant
= FALSE
;
1680 enumerator
= this->ike_sa
->create_child_sa_enumerator(this->ike_sa
);
1681 while (enumerator
->enumerate(enumerator
, ¤t
))
1683 if (current
->get_state(current
) == CHILD_INSTALLED
&&
1684 streq(current
->get_name(current
), child_sa
->get_name(child_sa
)) &&
1685 have_equal_ts(current
, child_sa
, TRUE
) &&
1686 have_equal_ts(current
, child_sa
, FALSE
) &&
1687 current
->get_lifetime(current
, FALSE
) >
1688 child_sa
->get_lifetime(child_sa
, FALSE
))
1690 DBG1(DBG_IKE
, "deleting redundant CHILD_SA %s{%d}",
1691 child_sa
->get_name(child_sa
),
1692 child_sa
->get_unique_id(child_sa
));
1697 enumerator
->destroy(enumerator
);
1703 * Get the first traffic selector of a CHILD_SA, local or remote
1705 static traffic_selector_t
* get_first_ts(child_sa_t
*child_sa
, bool local
)
1707 traffic_selector_t
*ts
= NULL
;
1708 enumerator_t
*enumerator
;
1710 enumerator
= child_sa
->create_ts_enumerator(child_sa
, local
);
1711 enumerator
->enumerate(enumerator
, &ts
);
1712 enumerator
->destroy(enumerator
);
1717 METHOD(task_manager_t
, queue_child_rekey
, void,
1718 private_task_manager_t
*this, protocol_id_t protocol
, u_int32_t spi
)
1720 child_sa_t
*child_sa
;
1724 child_sa
= this->ike_sa
->get_child_sa(this->ike_sa
, protocol
, spi
, TRUE
);
1727 child_sa
= this->ike_sa
->get_child_sa(this->ike_sa
, protocol
, spi
, FALSE
);
1729 if (child_sa
&& child_sa
->get_state(child_sa
) == CHILD_INSTALLED
)
1731 if (is_redundant(this, child_sa
))
1733 queue_task(this, (task_t
*)quick_delete_create(this->ike_sa
,
1734 protocol
, spi
, FALSE
, FALSE
));
1738 child_sa
->set_state(child_sa
, CHILD_REKEYING
);
1739 cfg
= child_sa
->get_config(child_sa
);
1740 task
= quick_mode_create(this->ike_sa
, cfg
->get_ref(cfg
),
1741 get_first_ts(child_sa
, TRUE
), get_first_ts(child_sa
, FALSE
));
1742 task
->use_reqid(task
, child_sa
->get_reqid(child_sa
));
1743 task
->use_marks(task
, child_sa
->get_mark(child_sa
, TRUE
).value
,
1744 child_sa
->get_mark(child_sa
, FALSE
).value
);
1745 task
->rekey(task
, child_sa
->get_spi(child_sa
, TRUE
));
1747 queue_task(this, &task
->task
);
1752 METHOD(task_manager_t
, queue_child_delete
, void,
1753 private_task_manager_t
*this, protocol_id_t protocol
, u_int32_t spi
,
1756 queue_task(this, (task_t
*)quick_delete_create(this->ike_sa
, protocol
,
1757 spi
, FALSE
, expired
));
1760 METHOD(task_manager_t
, queue_dpd
, void,
1761 private_task_manager_t
*this)
1763 peer_cfg_t
*peer_cfg
;
1764 u_int32_t t
, retransmit
;
1766 queue_task(this, (task_t
*)isakmp_dpd_create(this->ike_sa
, DPD_R_U_THERE
,
1768 peer_cfg
= this->ike_sa
->get_peer_cfg(this->ike_sa
);
1770 /* compute timeout in milliseconds */
1771 t
= 1000 * peer_cfg
->get_dpd_timeout(peer_cfg
);
1774 /* use the same timeout as a retransmitting IKE message would have */
1775 for (retransmit
= 0; retransmit
<= this->retransmit_tries
; retransmit
++)
1777 t
+= (u_int32_t
)(this->retransmit_timeout
* 1000.0 *
1778 pow(this->retransmit_base
, retransmit
));
1782 /* schedule DPD timeout job */
1783 lib
->scheduler
->schedule_job_ms(lib
->scheduler
,
1784 (job_t
*)dpd_timeout_job_create(this->ike_sa
->get_id(this->ike_sa
)), t
);
1787 METHOD(task_manager_t
, adopt_tasks
, void,
1788 private_task_manager_t
*this, task_manager_t
*other_public
)
1790 private_task_manager_t
*other
= (private_task_manager_t
*)other_public
;
1793 /* move queued tasks from other to this */
1794 while (other
->queued_tasks
->remove_last(other
->queued_tasks
,
1795 (void**)&task
) == SUCCESS
)
1797 DBG2(DBG_IKE
, "migrating %N task", task_type_names
, task
->get_type(task
));
1798 task
->migrate(task
, this->ike_sa
);
1799 this->queued_tasks
->insert_first(this->queued_tasks
, task
);
1804 * Migrates child-creating tasks from src to dst
1806 static void migrate_child_tasks(private_task_manager_t
*this,
1807 linked_list_t
*src
, linked_list_t
*dst
)
1809 enumerator_t
*enumerator
;
1812 enumerator
= src
->create_enumerator(src
);
1813 while (enumerator
->enumerate(enumerator
, &task
))
1815 if (task
->get_type(task
) == TASK_QUICK_MODE
)
1817 src
->remove_at(src
, enumerator
);
1818 task
->migrate(task
, this->ike_sa
);
1819 dst
->insert_last(dst
, task
);
1822 enumerator
->destroy(enumerator
);
1825 METHOD(task_manager_t
, adopt_child_tasks
, void,
1826 private_task_manager_t
*this, task_manager_t
*other_public
)
1828 private_task_manager_t
*other
= (private_task_manager_t
*)other_public
;
1830 /* move active child tasks from other to this */
1831 migrate_child_tasks(this, other
->active_tasks
, this->queued_tasks
);
1832 /* do the same for queued tasks */
1833 migrate_child_tasks(this, other
->queued_tasks
, this->queued_tasks
);
1836 METHOD(task_manager_t
, busy
, bool,
1837 private_task_manager_t
*this)
1839 return (this->active_tasks
->get_count(this->active_tasks
) > 0);
1842 METHOD(task_manager_t
, incr_mid
, void,
1843 private_task_manager_t
*this, bool initiate
)
1847 METHOD(task_manager_t
, reset
, void,
1848 private_task_manager_t
*this, u_int32_t initiate
, u_int32_t respond
)
1850 enumerator_t
*enumerator
;
1853 /* reset message counters and retransmit packets */
1854 clear_packets(this->responding
.packets
);
1855 clear_packets(this->initiating
.packets
);
1856 this->responding
.seqnr
= RESPONDING_SEQ
;
1857 this->responding
.retransmitted
= 0;
1858 this->initiating
.mid
= 0;
1859 this->initiating
.seqnr
= 0;
1860 this->initiating
.retransmitted
= 0;
1861 this->initiating
.type
= EXCHANGE_TYPE_UNDEFINED
;
1862 DESTROY_IF(this->defrag
);
1863 this->defrag
= NULL
;
1864 if (initiate
!= UINT_MAX
)
1866 this->dpd_send
= initiate
;
1868 if (respond
!= UINT_MAX
)
1870 this->dpd_recv
= respond
;
1873 /* reset queued tasks */
1874 enumerator
= this->queued_tasks
->create_enumerator(this->queued_tasks
);
1875 while (enumerator
->enumerate(enumerator
, &task
))
1877 task
->migrate(task
, this->ike_sa
);
1879 enumerator
->destroy(enumerator
);
1881 /* reset active tasks */
1882 while (this->active_tasks
->remove_last(this->active_tasks
,
1883 (void**)&task
) == SUCCESS
)
1885 task
->migrate(task
, this->ike_sa
);
1886 this->queued_tasks
->insert_first(this->queued_tasks
, task
);
1890 METHOD(task_manager_t
, create_task_enumerator
, enumerator_t
*,
1891 private_task_manager_t
*this, task_queue_t queue
)
1895 case TASK_QUEUE_ACTIVE
:
1896 return this->active_tasks
->create_enumerator(this->active_tasks
);
1897 case TASK_QUEUE_PASSIVE
:
1898 return this->passive_tasks
->create_enumerator(this->passive_tasks
);
1899 case TASK_QUEUE_QUEUED
:
1900 return this->queued_tasks
->create_enumerator(this->queued_tasks
);
1902 return enumerator_create_empty();
1906 METHOD(task_manager_t
, destroy
, void,
1907 private_task_manager_t
*this)
1911 this->active_tasks
->destroy(this->active_tasks
);
1912 this->queued_tasks
->destroy(this->queued_tasks
);
1913 this->passive_tasks
->destroy(this->passive_tasks
);
1914 DESTROY_IF(this->defrag
);
1916 DESTROY_IF(this->queued
);
1917 clear_packets(this->responding
.packets
);
1918 array_destroy(this->responding
.packets
);
1919 clear_packets(this->initiating
.packets
);
1920 array_destroy(this->initiating
.packets
);
1921 DESTROY_IF(this->rng
);
1928 task_manager_v1_t
*task_manager_v1_create(ike_sa_t
*ike_sa
)
1930 private_task_manager_t
*this;
1935 .process_message
= _process_message
,
1936 .queue_task
= _queue_task
,
1937 .queue_ike
= _queue_ike
,
1938 .queue_ike_rekey
= _queue_ike_rekey
,
1939 .queue_ike_reauth
= _queue_ike_reauth
,
1940 .queue_ike_delete
= _queue_ike_delete
,
1941 .queue_mobike
= _queue_mobike
,
1942 .queue_child
= _queue_child
,
1943 .queue_child_rekey
= _queue_child_rekey
,
1944 .queue_child_delete
= _queue_child_delete
,
1945 .queue_dpd
= _queue_dpd
,
1946 .initiate
= _initiate
,
1947 .retransmit
= _retransmit
,
1948 .incr_mid
= _incr_mid
,
1950 .adopt_tasks
= _adopt_tasks
,
1951 .adopt_child_tasks
= _adopt_child_tasks
,
1953 .create_task_enumerator
= _create_task_enumerator
,
1955 .flush_queue
= _flush_queue
,
1956 .destroy
= _destroy
,
1960 .type
= EXCHANGE_TYPE_UNDEFINED
,
1963 .seqnr
= RESPONDING_SEQ
,
1966 .rng
= lib
->crypto
->create_rng(lib
->crypto
, RNG_WEAK
),
1967 .queued_tasks
= linked_list_create(),
1968 .active_tasks
= linked_list_create(),
1969 .passive_tasks
= linked_list_create(),
1970 .retransmit_tries
= lib
->settings
->get_int(lib
->settings
,
1971 "%s.retransmit_tries", RETRANSMIT_TRIES
, lib
->ns
),
1972 .retransmit_timeout
= lib
->settings
->get_double(lib
->settings
,
1973 "%s.retransmit_timeout", RETRANSMIT_TIMEOUT
, lib
->ns
),
1974 .retransmit_base
= lib
->settings
->get_double(lib
->settings
,
1975 "%s.retransmit_base", RETRANSMIT_BASE
, lib
->ns
),
1980 DBG1(DBG_IKE
, "no RNG found, unable to create IKE_SA");
1984 if (!this->rng
->get_bytes(this->rng
, sizeof(this->dpd_send
),
1985 (void*)&this->dpd_send
))
1987 DBG1(DBG_IKE
, "failed to allocate message ID, unable to create IKE_SA");
1991 this->dpd_send
&= 0x7FFFFFFF;
1993 return &this->public;