Imported Upstream version 5.0.1

1 files changed, 16 insertions, 1123 deletions

diff --git a/src/libcharon/sa/task_manager.c b/src/libcharon/sa/task_manager.c
index 022a5e3d6..c42008ba9 100644
--- a/src/libcharon/sa/task_manager.c
+++ b/src/libcharon/sa/task_manager.c
@@ -1,6 +1,5 @@
 /*
- * Copyright (C) 2007 Tobias Brunner
- * Copyright (C) 2007-2010 Martin Willi
+ * Copyright (C) 2011 Tobias Brunner
  * Hochschule fuer Technik Rapperswil
  *
  * This program is free software; you can redistribute it and/or modify it
@@ -16,1135 +15,29 @@
 
 #include "task_manager.h"
 
-#include <math.h>
-
-#include <daemon.h>
-#include <sa/tasks/ike_init.h>
-#include <sa/tasks/ike_natd.h>
-#include <sa/tasks/ike_mobike.h>
-#include <sa/tasks/ike_auth.h>
-#include <sa/tasks/ike_auth_lifetime.h>
-#include <sa/tasks/ike_cert_pre.h>
-#include <sa/tasks/ike_cert_post.h>
-#include <sa/tasks/ike_rekey.h>
-#include <sa/tasks/ike_delete.h>
-#include <sa/tasks/ike_config.h>
-#include <sa/tasks/ike_dpd.h>
-#include <sa/tasks/ike_vendor.h>
-#include <sa/tasks/child_create.h>
-#include <sa/tasks/child_rekey.h>
-#include <sa/tasks/child_delete.h>
-#include <encoding/payloads/delete_payload.h>
-#include <processing/jobs/retransmit_job.h>
-
-#ifdef ME
-#include <sa/tasks/ike_me.h>
-#endif
-
-typedef struct exchange_t exchange_t;
+#include <sa/ikev1/task_manager_v1.h>
+#include <sa/ikev2/task_manager_v2.h>
 
 /**
- * An exchange in the air, used do detect and handle retransmission
+ * See header
  */
-struct exchange_t {
-
-	/**
-	 * Message ID used for this transaction
-	 */
-	u_int32_t mid;
-
-	/**
-	 * generated packet for retransmission
-	 */
-	packet_t *packet;
-};
-
-typedef struct private_task_manager_t private_task_manager_t;
-
-/**
- * private data of the task manager
- */
-struct private_task_manager_t {
-
-	/**
-	 * public functions
-	 */
-	task_manager_t public;
-
-	/**
-	 * associated IKE_SA we are serving
-	 */
-	ike_sa_t *ike_sa;
-
-	/**
-	 * Exchange we are currently handling as responder
-	 */
-	struct {
-		/**
-		 * Message ID of the exchange
-		 */
-		u_int32_t mid;
-
-		/**
-		 * packet for retransmission
-		 */
-		packet_t *packet;
-
-	} responding;
-
-	/**
-	 * Exchange we are currently handling as initiator
-	 */
-	struct {
-		/**
-		 * Message ID of the exchange
-		 */
-		u_int32_t mid;
-
-		/**
-		 * how many times we have retransmitted so far
-		 */
-		u_int retransmitted;
-
-		/**
-		 * packet for retransmission
-		 */
-		packet_t *packet;
-
-		/**
-		 * type of the initated exchange
-		 */
-		exchange_type_t type;
-
-	} initiating;
-
-	/**
-	 * List of queued tasks not yet in action
-	 */
-	linked_list_t *queued_tasks;
-
-	/**
-	 * List of active tasks, initiated by ourselve
-	 */
-	linked_list_t *active_tasks;
-
-	/**
-	 * List of tasks initiated by peer
-	 */
-	linked_list_t *passive_tasks;
-
-	/**
-	 * the task manager has been reset
-	 */
-	bool reset;
-
-	/**
-	 * Number of times we retransmit messages before giving up
-	 */
-	u_int retransmit_tries;
-
-	/**
-	 * Retransmission timeout
-	 */
-	double retransmit_timeout;
-
-	/**
-	 * Base to calculate retransmission timeout
-	 */
-	double retransmit_base;
-};
-
-/**
- * flush all tasks in the task manager
- */
-static void flush(private_task_manager_t *this)
-{
-	this->passive_tasks->destroy_offset(this->passive_tasks,
-										offsetof(task_t, destroy));
-	this->passive_tasks = linked_list_create();
-	this->active_tasks->destroy_offset(this->active_tasks,
-										offsetof(task_t, destroy));
-	this->active_tasks = linked_list_create();
-	this->queued_tasks->destroy_offset(this->queued_tasks,
-										offsetof(task_t, destroy));
-	this->queued_tasks = linked_list_create();
-}
-
-/**
- * move a task of a specific type from the queue to the active list
- */
-static bool activate_task(private_task_manager_t *this, task_type_t type)
-{
-	enumerator_t *enumerator;
-	task_t *task;
-	bool found = FALSE;
-
-	enumerator = this->queued_tasks->create_enumerator(this->queued_tasks);
-	while (enumerator->enumerate(enumerator, (void**)&task))
-	{
-		if (task->get_type(task) == type)
-		{
-			DBG2(DBG_IKE, "  activating %N task", task_type_names, type);
-			this->queued_tasks->remove_at(this->queued_tasks, enumerator);
-			this->active_tasks->insert_last(this->active_tasks, task);
-			found = TRUE;
-			break;
-		}
-	}
-	enumerator->destroy(enumerator);
-	return found;
-}
-
-METHOD(task_manager_t, retransmit, status_t,
-	private_task_manager_t *this, u_int32_t message_id)
-{
-	if (message_id == this->initiating.mid)
-	{
-		u_int32_t timeout;
-		job_t *job;
-		enumerator_t *enumerator;
-		packet_t *packet;
-		task_t *task;
-		ike_mobike_t *mobike = NULL;
-
-		/* check if we are retransmitting a MOBIKE routability check */
-		enumerator = this->active_tasks->create_enumerator(this->active_tasks);
-		while (enumerator->enumerate(enumerator, (void*)&task))
-		{
-			if (task->get_type(task) == IKE_MOBIKE)
-			{
-				mobike = (ike_mobike_t*)task;
-				if (!mobike->is_probing(mobike))
-				{
-					mobike = NULL;
-				}
-				break;
-			}
-		}
-		enumerator->destroy(enumerator);
-
-		if (mobike == NULL)
-		{
-			if (this->initiating.retransmitted <= this->retransmit_tries)
-			{
-				timeout = (u_int32_t)(this->retransmit_timeout * 1000.0 *
-					pow(this->retransmit_base, this->initiating.retransmitted));
-			}
-			else
-			{
-				DBG1(DBG_IKE, "giving up after %d retransmits",
-					 this->initiating.retransmitted - 1);
-				if (this->ike_sa->get_state(this->ike_sa) != IKE_CONNECTING)
-				{
-					charon->bus->ike_updown(charon->bus, this->ike_sa, FALSE);
-				}
-				return DESTROY_ME;
-			}
-
-			if (this->initiating.retransmitted)
-			{
-				DBG1(DBG_IKE, "retransmit %d of request with message ID %d",
-					 this->initiating.retransmitted, message_id);
-			}
-			packet = this->initiating.packet->clone(this->initiating.packet);
-			charon->sender->send(charon->sender, packet);
-		}
-		else
-		{	/* for routeability checks, we use a more aggressive behavior */
-			if (this->initiating.retransmitted <= ROUTEABILITY_CHECK_TRIES)
-			{
-				timeout = ROUTEABILITY_CHECK_INTERVAL;
-			}
-			else
-			{
-				DBG1(DBG_IKE, "giving up after %d path probings",
-					 this->initiating.retransmitted - 1);
-				charon->bus->ike_updown(charon->bus, this->ike_sa, FALSE);
-				return DESTROY_ME;
-			}
-
-			if (this->initiating.retransmitted)
-			{
-				DBG1(DBG_IKE, "path probing attempt %d",
-					 this->initiating.retransmitted);
-			}
-			mobike->transmit(mobike, this->initiating.packet);
-		}
-
-		this->initiating.retransmitted++;
-		job = (job_t*)retransmit_job_create(this->initiating.mid,
-											this->ike_sa->get_id(this->ike_sa));
-		lib->scheduler->schedule_job_ms(lib->scheduler, job, timeout);
-	}
-	return SUCCESS;
-}
-
-METHOD(task_manager_t, initiate, status_t,
-	private_task_manager_t *this)
+task_manager_t *task_manager_create(ike_sa_t *ike_sa)
 {
-	enumerator_t *enumerator;
-	task_t *task;
-	message_t *message;
-	host_t *me, *other;
-	status_t status;
-	exchange_type_t exchange = 0;
-
-	if (this->initiating.type != EXCHANGE_TYPE_UNDEFINED)
-	{
-		DBG2(DBG_IKE, "delaying task initiation, %N exchange in progress",
-				exchange_type_names, this->initiating.type);
-		/* do not initiate if we already have a message in the air */
-		return SUCCESS;
-	}
-
-	if (this->active_tasks->get_count(this->active_tasks) == 0)
-	{
-		DBG2(DBG_IKE, "activating new tasks");
-		switch (this->ike_sa->get_state(this->ike_sa))
-		{
-			case IKE_CREATED:
-				activate_task(this, IKE_VENDOR);
-				if (activate_task(this, IKE_INIT))
-				{
-					this->initiating.mid = 0;
-					exchange = IKE_SA_INIT;
-					activate_task(this, IKE_NATD);
-					activate_task(this, IKE_CERT_PRE);
-#ifdef ME
-					/* this task has to be activated before the IKE_AUTHENTICATE
-					 * task, because that task pregenerates the packet after
-					 * which no payloads can be added to the message anymore.
-					 */
-					activate_task(this, IKE_ME);
-#endif /* ME */
-					activate_task(this, IKE_AUTHENTICATE);
-					activate_task(this, IKE_CERT_POST);
-					activate_task(this, IKE_CONFIG);
-					activate_task(this, CHILD_CREATE);
-					activate_task(this, IKE_AUTH_LIFETIME);
-					activate_task(this, IKE_MOBIKE);
-				}
-				break;
-			case IKE_ESTABLISHED:
-				if (activate_task(this, CHILD_CREATE))
-				{
-					exchange = CREATE_CHILD_SA;
-					break;
-				}
-				if (activate_task(this, CHILD_DELETE))
-				{
-					exchange = INFORMATIONAL;
-					break;
-				}
-				if (activate_task(this, CHILD_REKEY))
-				{
-					exchange = CREATE_CHILD_SA;
-					break;
-				}
-				if (activate_task(this, IKE_DELETE))
-				{
-					exchange = INFORMATIONAL;
-					break;
-				}
-				if (activate_task(this, IKE_REKEY))
-				{
-					exchange = CREATE_CHILD_SA;
-					break;
-				}
-				if (activate_task(this, IKE_REAUTH))
-				{
-					exchange = INFORMATIONAL;
-					break;
-				}
-				if (activate_task(this, IKE_MOBIKE))
-				{
-					exchange = INFORMATIONAL;
-					break;
-				}
-				if (activate_task(this, IKE_DPD))
-				{
-					exchange = INFORMATIONAL;
-					break;
-				}
-				if (activate_task(this, IKE_AUTH_LIFETIME))
-				{
-					exchange = INFORMATIONAL;
-					break;
-				}
-#ifdef ME
-				if (activate_task(this, IKE_ME))
-				{
-					exchange = ME_CONNECT;
-					break;
-				}
-#endif /* ME */
-			case IKE_REKEYING:
-				if (activate_task(this, IKE_DELETE))
-				{
-					exchange = INFORMATIONAL;
-					break;
-				}
-			case IKE_DELETING:
-			default:
-				break;
-		}
-	}
-	else
+	switch (ike_sa->get_version(ike_sa))
 	{
-		DBG2(DBG_IKE, "reinitiating already active tasks");
-		enumerator = this->active_tasks->create_enumerator(this->active_tasks);
-		while (enumerator->enumerate(enumerator, (void**)&task))
-		{
-			DBG2(DBG_IKE, "  %N task", task_type_names, task->get_type(task));
-			switch (task->get_type(task))
-			{
-				case IKE_INIT:
-					exchange = IKE_SA_INIT;
-					break;
-				case IKE_AUTHENTICATE:
-					exchange = IKE_AUTH;
-					break;
-				case CHILD_CREATE:
-				case CHILD_REKEY:
-				case IKE_REKEY:
-					exchange = CREATE_CHILD_SA;
-					break;
-				case IKE_MOBIKE:
-					exchange = INFORMATIONAL;
-					break;
-				default:
-					continue;
-			}
+		case IKEV1:
+#ifdef USE_IKEV1
+			return &task_manager_v1_create(ike_sa)->task_manager;
+#endif
 			break;
-		}
-		enumerator->destroy(enumerator);
-	}
-
-	if (exchange == 0)
-	{
-		DBG2(DBG_IKE, "nothing to initiate");
-		/* nothing to do yet... */
-		return SUCCESS;
-	}
-
-	me = this->ike_sa->get_my_host(this->ike_sa);
-	other = this->ike_sa->get_other_host(this->ike_sa);
-
-	message = message_create();
-	message->set_message_id(message, this->initiating.mid);
-	message->set_source(message, me->clone(me));
-	message->set_destination(message, other->clone(other));
-	message->set_exchange_type(message, exchange);
-	this->initiating.type = exchange;
-	this->initiating.retransmitted = 0;
-
-	enumerator = this->active_tasks->create_enumerator(this->active_tasks);
-	while (enumerator->enumerate(enumerator, (void*)&task))
-	{
-		switch (task->build(task, message))
-		{
-			case SUCCESS:
-				/* task completed, remove it */
-				this->active_tasks->remove_at(this->active_tasks, enumerator);
-				task->destroy(task);
-				break;
-			case NEED_MORE:
-				/* processed, but task needs another exchange */
-				break;
-			case FAILED:
-			default:
-				if (this->ike_sa->get_state(this->ike_sa) != IKE_CONNECTING)
-				{
-					charon->bus->ike_updown(charon->bus, this->ike_sa, FALSE);
-				}
-				/* FALL */
-			case DESTROY_ME:
-				/* critical failure, destroy IKE_SA */
-				enumerator->destroy(enumerator);
-				message->destroy(message);
-				flush(this);
-				return DESTROY_ME;
-		}
-	}
-	enumerator->destroy(enumerator);
-
-	/* update exchange type if a task changed it */
-	this->initiating.type = message->get_exchange_type(message);
-
-	status = this->ike_sa->generate_message(this->ike_sa, message,
-											&this->initiating.packet);
-	if (status != SUCCESS)
-	{
-		/* message generation failed. There is nothing more to do than to
-		 * close the SA */
-		message->destroy(message);
-		flush(this);
-		charon->bus->ike_updown(charon->bus, this->ike_sa, FALSE);
-		return DESTROY_ME;
-	}
-	message->destroy(message);
-
-	return retransmit(this, this->initiating.mid);
-}
-
-/**
- * handle an incoming response message
- */
-static status_t process_response(private_task_manager_t *this,
-								 message_t *message)
-{
-	enumerator_t *enumerator;
-	task_t *task;
-
-	if (message->get_exchange_type(message) != this->initiating.type)
-	{
-		DBG1(DBG_IKE, "received %N response, but expected %N",
-			 exchange_type_names, message->get_exchange_type(message),
-			 exchange_type_names, this->initiating.type);
-		charon->bus->ike_updown(charon->bus, this->ike_sa, FALSE);
-		return DESTROY_ME;
-	}
-
-	/* catch if we get resetted while processing */
-	this->reset = FALSE;
-	enumerator = this->active_tasks->create_enumerator(this->active_tasks);
-	while (enumerator->enumerate(enumerator, (void*)&task))
-	{
-		switch (task->process(task, message))
-		{
-			case SUCCESS:
-				/* task completed, remove it */
-				this->active_tasks->remove_at(this->active_tasks, enumerator);
-				task->destroy(task);
-				break;
-			case NEED_MORE:
-				/* processed, but task needs another exchange */
-				break;
-			case FAILED:
-			default:
-				charon->bus->ike_updown(charon->bus, this->ike_sa, FALSE);
-				/* FALL */
-			case DESTROY_ME:
-				/* critical failure, destroy IKE_SA */
-				this->active_tasks->remove_at(this->active_tasks, enumerator);
-				enumerator->destroy(enumerator);
-				task->destroy(task);
-				return DESTROY_ME;
-		}
-		if (this->reset)
-		{	/* start all over again if we were reset */
-			this->reset = FALSE;
-			enumerator->destroy(enumerator);
-			return initiate(this);
-		}
-	}
-	enumerator->destroy(enumerator);
-
-	this->initiating.mid++;
-	this->initiating.type = EXCHANGE_TYPE_UNDEFINED;
-	this->initiating.packet->destroy(this->initiating.packet);
-	this->initiating.packet = NULL;
-
-	return initiate(this);
-}
-
-/**
- * handle exchange collisions
- */
-static bool handle_collisions(private_task_manager_t *this, task_t *task)
-{
-	enumerator_t *enumerator;
-	task_t *active;
-	task_type_t type;
-
-	type = task->get_type(task);
-
-	/* do we have to check  */
-	if (type == IKE_REKEY || type == CHILD_REKEY ||
-		type == CHILD_DELETE || type == IKE_DELETE || type == IKE_REAUTH)
-	{
-		/* find an exchange collision, and notify these tasks */
-		enumerator = this->active_tasks->create_enumerator(this->active_tasks);
-		while (enumerator->enumerate(enumerator, (void**)&active))
-		{
-			switch (active->get_type(active))
-			{
-				case IKE_REKEY:
-					if (type == IKE_REKEY || type == IKE_DELETE ||
-						type == IKE_REAUTH)
-					{
-						ike_rekey_t *rekey = (ike_rekey_t*)active;
-						rekey->collide(rekey, task);
-						break;
-					}
-					continue;
-				case CHILD_REKEY:
-					if (type == CHILD_REKEY || type == CHILD_DELETE)
-					{
-						child_rekey_t *rekey = (child_rekey_t*)active;
-						rekey->collide(rekey, task);
-						break;
-					}
-					continue;
-				default:
-					continue;
-			}
-			enumerator->destroy(enumerator);
-			return TRUE;
-		}
-		enumerator->destroy(enumerator);
-	}
-	return FALSE;
-}
-
-/**
- * build a response depending on the "passive" task list
- */
-static status_t build_response(private_task_manager_t *this, message_t *request)
-{
-	enumerator_t *enumerator;
-	task_t *task;
-	message_t *message;
-	host_t *me, *other;
-	bool delete = FALSE, hook = FALSE;
-	status_t status;
-
-	me = request->get_destination(request);
-	other = request->get_source(request);
-
-	message = message_create();
-	message->set_exchange_type(message, request->get_exchange_type(request));
-	/* send response along the path the request came in */
-	message->set_source(message, me->clone(me));
-	message->set_destination(message, other->clone(other));
-	message->set_message_id(message, this->responding.mid);
-	message->set_request(message, FALSE);
-
-	enumerator = this->passive_tasks->create_enumerator(this->passive_tasks);
-	while (enumerator->enumerate(enumerator, (void*)&task))
-	{
-		switch (task->build(task, message))
-		{
-			case SUCCESS:
-				/* task completed, remove it */
-				this->passive_tasks->remove_at(this->passive_tasks, enumerator);
-				if (!handle_collisions(this, task))
-				{
-					task->destroy(task);
-				}
-				break;
-			case NEED_MORE:
-				/* processed, but task needs another exchange */
-				if (handle_collisions(this, task))
-				{
-					this->passive_tasks->remove_at(this->passive_tasks,
-												   enumerator);
-				}
-				break;
-			case FAILED:
-			default:
-				hook = TRUE;
-				/* FALL */
-			case DESTROY_ME:
-				/* destroy IKE_SA, but SEND response first */
-				delete = TRUE;
-				break;
-		}
-		if (delete)
-		{
+		case IKEV2:
+#ifdef USE_IKEV2
+			return &task_manager_v2_create(ike_sa)->task_manager;
+#endif
 			break;
-		}
-	}
-	enumerator->destroy(enumerator);
-
-	/* remove resonder SPI if IKE_SA_INIT failed */
-	if (delete && request->get_exchange_type(request) == IKE_SA_INIT)
-	{
-		ike_sa_id_t *id = this->ike_sa->get_id(this->ike_sa);
-		id->set_responder_spi(id, 0);
-	}
-
-	/* message complete, send it */
-	DESTROY_IF(this->responding.packet);
-	this->responding.packet = NULL;
-	status = this->ike_sa->generate_message(this->ike_sa, message,
-											&this->responding.packet);
-	message->destroy(message);
-	if (status != SUCCESS)
-	{
-		charon->bus->ike_updown(charon->bus, this->ike_sa, FALSE);
-		return DESTROY_ME;
-	}
-
-	charon->sender->send(charon->sender,
-						 this->responding.packet->clone(this->responding.packet));
-	if (delete)
-	{
-		if (hook)
-		{
-			charon->bus->ike_updown(charon->bus, this->ike_sa, FALSE);
-		}
-		return DESTROY_ME;
-	}
-	return SUCCESS;
-}
-
-/**
- * handle an incoming request message
- */
-static status_t process_request(private_task_manager_t *this,
-								message_t *message)
-{
-	enumerator_t *enumerator;
-	task_t *task = NULL;
-	payload_t *payload;
-	notify_payload_t *notify;
-	delete_payload_t *delete;
-
-	if (this->passive_tasks->get_count(this->passive_tasks) == 0)
-	{	/* create tasks depending on request type, if not already some queued */
-		switch (message->get_exchange_type(message))
-		{
-			case IKE_SA_INIT:
-			{
-				task = (task_t*)ike_vendor_create(this->ike_sa, FALSE);
-				this->passive_tasks->insert_last(this->passive_tasks, task);
-				task = (task_t*)ike_init_create(this->ike_sa, FALSE, NULL);
-				this->passive_tasks->insert_last(this->passive_tasks, task);
-				task = (task_t*)ike_natd_create(this->ike_sa, FALSE);
-				this->passive_tasks->insert_last(this->passive_tasks, task);
-				task = (task_t*)ike_cert_pre_create(this->ike_sa, FALSE);
-				this->passive_tasks->insert_last(this->passive_tasks, task);
-#ifdef ME
-				task = (task_t*)ike_me_create(this->ike_sa, FALSE);
-				this->passive_tasks->insert_last(this->passive_tasks, task);
-#endif /* ME */
-				task = (task_t*)ike_auth_create(this->ike_sa, FALSE);
-				this->passive_tasks->insert_last(this->passive_tasks, task);
-				task = (task_t*)ike_cert_post_create(this->ike_sa, FALSE);
-				this->passive_tasks->insert_last(this->passive_tasks, task);
-				task = (task_t*)ike_config_create(this->ike_sa, FALSE);
-				this->passive_tasks->insert_last(this->passive_tasks, task);
-				task = (task_t*)child_create_create(this->ike_sa, NULL, FALSE,
-													NULL, NULL);
-				this->passive_tasks->insert_last(this->passive_tasks, task);
-				task = (task_t*)ike_auth_lifetime_create(this->ike_sa, FALSE);
-				this->passive_tasks->insert_last(this->passive_tasks, task);
-				task = (task_t*)ike_mobike_create(this->ike_sa, FALSE);
-				this->passive_tasks->insert_last(this->passive_tasks, task);
-				break;
-			}
-			case CREATE_CHILD_SA:
-			{	/* FIXME: we should prevent this on mediation connections */
-				bool notify_found = FALSE, ts_found = FALSE;
-				enumerator = message->create_payload_enumerator(message);
-				while (enumerator->enumerate(enumerator, &payload))
-				{
-					switch (payload->get_type(payload))
-					{
-						case NOTIFY:
-						{	/* if we find a rekey notify, its CHILD_SA rekeying */
-							notify = (notify_payload_t*)payload;
-							if (notify->get_notify_type(notify) == REKEY_SA &&
-								(notify->get_protocol_id(notify) == PROTO_AH ||
-								 notify->get_protocol_id(notify) == PROTO_ESP))
-							{
-								notify_found = TRUE;
-							}
-							break;
-						}
-						case TRAFFIC_SELECTOR_INITIATOR:
-						case TRAFFIC_SELECTOR_RESPONDER:
-						{	/* if we don't find a TS, its IKE rekeying */
-							ts_found = TRUE;
-							break;
-						}
-						default:
-							break;
-					}
-				}
-				enumerator->destroy(enumerator);
-
-				if (ts_found)
-				{
-					if (notify_found)
-					{
-						task = (task_t*)child_rekey_create(this->ike_sa,
-														   PROTO_NONE, 0);
-					}
-					else
-					{
-						task = (task_t*)child_create_create(this->ike_sa, NULL,
-															FALSE, NULL, NULL);
-					}
-				}
-				else
-				{
-					task = (task_t*)ike_rekey_create(this->ike_sa, FALSE);
-				}
-				this->passive_tasks->insert_last(this->passive_tasks, task);
-				break;
-			}
-			case INFORMATIONAL:
-			{
-				enumerator = message->create_payload_enumerator(message);
-				while (enumerator->enumerate(enumerator, &payload))
-				{
-					switch (payload->get_type(payload))
-					{
-						case NOTIFY:
-						{
-							notify = (notify_payload_t*)payload;
-							switch (notify->get_notify_type(notify))
-							{
-								case ADDITIONAL_IP4_ADDRESS:
-								case ADDITIONAL_IP6_ADDRESS:
-								case NO_ADDITIONAL_ADDRESSES:
-								case UPDATE_SA_ADDRESSES:
-								case NO_NATS_ALLOWED:
-								case UNACCEPTABLE_ADDRESSES:
-								case UNEXPECTED_NAT_DETECTED:
-								case COOKIE2:
-								case NAT_DETECTION_SOURCE_IP:
-								case NAT_DETECTION_DESTINATION_IP:
-									task = (task_t*)ike_mobike_create(
-															this->ike_sa, FALSE);
-									break;
-								case AUTH_LIFETIME:
-									task = (task_t*)ike_auth_lifetime_create(
-															this->ike_sa, FALSE);
-									break;
-								default:
-									break;
-							}
-							break;
-						}
-						case DELETE:
-						{
-							delete = (delete_payload_t*)payload;
-							if (delete->get_protocol_id(delete) == PROTO_IKE)
-							{
-								task = (task_t*)ike_delete_create(this->ike_sa,
-																FALSE);
-							}
-							else
-							{
-								task = (task_t*)child_delete_create(this->ike_sa,
-																PROTO_NONE, 0);
-							}
-							break;
-						}
-						default:
-							break;
-					}
-					if (task)
-					{
-						break;
-					}
-				}
-				enumerator->destroy(enumerator);
-
-				if (task == NULL)
-				{
-					task = (task_t*)ike_dpd_create(FALSE);
-				}
-				this->passive_tasks->insert_last(this->passive_tasks, task);
-				break;
-			}
-#ifdef ME
-			case ME_CONNECT:
-			{
-				task = (task_t*)ike_me_create(this->ike_sa, FALSE);
-				this->passive_tasks->insert_last(this->passive_tasks, task);
-			}
-#endif /* ME */
-			default:
-				break;
-		}
-	}
-
-	/* let the tasks process the message */
-	enumerator = this->passive_tasks->create_enumerator(this->passive_tasks);
-	while (enumerator->enumerate(enumerator, (void*)&task))
-	{
-		switch (task->process(task, message))
-		{
-			case SUCCESS:
-				/* task completed, remove it */
-				this->passive_tasks->remove_at(this->passive_tasks, enumerator);
-				task->destroy(task);
-				break;
-			case NEED_MORE:
-				/* processed, but task needs at least another call to build() */
-				break;
-			case FAILED:
-			default:
-				charon->bus->ike_updown(charon->bus, this->ike_sa, FALSE);
-				/* FALL */
-			case DESTROY_ME:
-				/* critical failure, destroy IKE_SA */
-				this->passive_tasks->remove_at(this->passive_tasks, enumerator);
-				enumerator->destroy(enumerator);
-				task->destroy(task);
-				return DESTROY_ME;
-		}
-	}
-	enumerator->destroy(enumerator);
-
-	return build_response(this, message);
-}
-
-METHOD(task_manager_t, process_message, status_t,
-	private_task_manager_t *this, message_t *msg)
-{
-	host_t *me, *other;
-	u_int32_t mid;
-
-	mid = msg->get_message_id(msg);
-	me = msg->get_destination(msg);
-	other = msg->get_source(msg);
-
-	if (msg->get_request(msg))
-	{
-		if (mid == this->responding.mid)
-		{
-			if (this->ike_sa->get_state(this->ike_sa) == IKE_CREATED ||
-				this->ike_sa->get_state(this->ike_sa) == IKE_CONNECTING ||
-				msg->get_exchange_type(msg) != IKE_SA_INIT)
-			{	/* only do host updates based on verified messages */
-				if (!this->ike_sa->supports_extension(this->ike_sa, EXT_MOBIKE))
-				{	/* with MOBIKE, we do no implicit updates */
-					this->ike_sa->update_hosts(this->ike_sa, me, other, mid == 1);
-				}
-			}
-			charon->bus->message(charon->bus, msg, TRUE);
-			if (msg->get_exchange_type(msg) == EXCHANGE_TYPE_UNDEFINED)
-			{	/* ignore messages altered to EXCHANGE_TYPE_UNDEFINED */
-				return SUCCESS;
-			}
-			if (process_request(this, msg) != SUCCESS)
-			{
-				flush(this);
-				return DESTROY_ME;
-			}
-			this->responding.mid++;
-		}
-		else if ((mid == this->responding.mid - 1) && this->responding.packet)
-		{
-			packet_t *clone;
-			host_t *host;
-
-			DBG1(DBG_IKE, "received retransmit of request with ID %d, "
-				 "retransmitting response", mid);
-			clone = this->responding.packet->clone(this->responding.packet);
-			host = msg->get_destination(msg);
-			clone->set_source(clone, host->clone(host));
-			host = msg->get_source(msg);
-			clone->set_destination(clone, host->clone(host));
-			charon->sender->send(charon->sender, clone);
-		}
-		else
-		{
-			DBG1(DBG_IKE, "received message ID %d, expected %d. Ignored",
-				 mid, this->responding.mid);
-		}
-	}
-	else
-	{
-		if (mid == this->initiating.mid)
-		{
-			if (this->ike_sa->get_state(this->ike_sa) == IKE_CREATED ||
-				this->ike_sa->get_state(this->ike_sa) == IKE_CONNECTING ||
-				msg->get_exchange_type(msg) != IKE_SA_INIT)
-			{	/* only do host updates based on verified messages */
-				if (!this->ike_sa->supports_extension(this->ike_sa, EXT_MOBIKE))
-				{	/* with MOBIKE, we do no implicit updates */
-					this->ike_sa->update_hosts(this->ike_sa, me, other, FALSE);
-				}
-			}
-			charon->bus->message(charon->bus, msg, TRUE);
-			if (msg->get_exchange_type(msg) == EXCHANGE_TYPE_UNDEFINED)
-			{	/* ignore messages altered to EXCHANGE_TYPE_UNDEFINED */
-				return SUCCESS;
-			}
-			if (process_response(this, msg) != SUCCESS)
-			{
-				flush(this);
-				return DESTROY_ME;
-			}
-		}
-		else
-		{
-			DBG1(DBG_IKE, "received message ID %d, expected %d. Ignored",
-				 mid, this->initiating.mid);
-			return SUCCESS;
-		}
-	}
-	return SUCCESS;
-}
-
-METHOD(task_manager_t, queue_task, void,
-	private_task_manager_t *this, task_t *task)
-{
-	if (task->get_type(task) == IKE_MOBIKE)
-	{	/*  there is no need to queue more than one mobike task */
-		enumerator_t *enumerator;
-		task_t *current;
-
-		enumerator = this->queued_tasks->create_enumerator(this->queued_tasks);
-		while (enumerator->enumerate(enumerator, (void**)&current))
-		{
-			if (current->get_type(current) == IKE_MOBIKE)
-			{
-				enumerator->destroy(enumerator);
-				task->destroy(task);
-				return;
-			}
-		}
-		enumerator->destroy(enumerator);
-	}
-	DBG2(DBG_IKE, "queueing %N task", task_type_names, task->get_type(task));
-	this->queued_tasks->insert_last(this->queued_tasks, task);
-}
-
-METHOD(task_manager_t, adopt_tasks, void,
-	private_task_manager_t *this, task_manager_t *other_public)
-{
-	private_task_manager_t *other = (private_task_manager_t*)other_public;
-	task_t *task;
-
-	/* move queued tasks from other to this */
-	while (other->queued_tasks->remove_last(other->queued_tasks,
-												(void**)&task) == SUCCESS)
-	{
-		DBG2(DBG_IKE, "migrating %N task", task_type_names, task->get_type(task));
-		task->migrate(task, this->ike_sa);
-		this->queued_tasks->insert_first(this->queued_tasks, task);
-	}
-}
-
-METHOD(task_manager_t, busy, bool,
-	private_task_manager_t *this)
-{
-	return (this->active_tasks->get_count(this->active_tasks) > 0);
-}
-
-METHOD(task_manager_t, incr_mid, void,
-	private_task_manager_t *this, bool initiate)
-{
-	if (initiate)
-	{
-		this->initiating.mid++;
-	}
-	else
-	{
-		this->responding.mid++;
-	}
-}
-
-METHOD(task_manager_t, reset, void,
-	private_task_manager_t *this, u_int32_t initiate, u_int32_t respond)
-{
-	enumerator_t *enumerator;
-	task_t *task;
-
-	/* reset message counters and retransmit packets */
-	DESTROY_IF(this->responding.packet);
-	DESTROY_IF(this->initiating.packet);
-	this->responding.packet = NULL;
-	this->initiating.packet = NULL;
-	if (initiate != UINT_MAX)
-	{
-		this->initiating.mid = initiate;
-	}
-	if (respond != UINT_MAX)
-	{
-		this->responding.mid = respond;
-	}
-	this->initiating.type = EXCHANGE_TYPE_UNDEFINED;
-
-	/* reset queued tasks */
-	enumerator = this->queued_tasks->create_enumerator(this->queued_tasks);
-	while (enumerator->enumerate(enumerator, &task))
-	{
-		task->migrate(task, this->ike_sa);
-	}
-	enumerator->destroy(enumerator);
-
-	/* reset active tasks */
-	while (this->active_tasks->remove_last(this->active_tasks,
-										   (void**)&task) == SUCCESS)
-	{
-		task->migrate(task, this->ike_sa);
-		this->queued_tasks->insert_first(this->queued_tasks, task);
-	}
-
-	this->reset = TRUE;
-}
-
-METHOD(task_manager_t, create_task_enumerator, enumerator_t*,
-	private_task_manager_t *this, task_queue_t queue)
-{
-	switch (queue)
-	{
-		case TASK_QUEUE_ACTIVE:
-			return this->active_tasks->create_enumerator(this->active_tasks);
-		case TASK_QUEUE_PASSIVE:
-			return this->passive_tasks->create_enumerator(this->passive_tasks);
-		case TASK_QUEUE_QUEUED:
-			return this->queued_tasks->create_enumerator(this->queued_tasks);
 		default:
-			return enumerator_create_empty();
+			break;
 	}
-}
-
-METHOD(task_manager_t, destroy, void,
-	private_task_manager_t *this)
-{
-	flush(this);
-
-	this->active_tasks->destroy(this->active_tasks);
-	this->queued_tasks->destroy(this->queued_tasks);
-	this->passive_tasks->destroy(this->passive_tasks);
-
-	DESTROY_IF(this->responding.packet);
-	DESTROY_IF(this->initiating.packet);
-	free(this);
-}
-
-/*
- * see header file
- */
-task_manager_t *task_manager_create(ike_sa_t *ike_sa)
-{
-	private_task_manager_t *this;
-
-	INIT(this,
-		.public = {
-			.process_message = _process_message,
-			.queue_task = _queue_task,
-			.initiate = _initiate,
-			.retransmit = _retransmit,
-			.incr_mid = _incr_mid,
-			.reset = _reset,
-			.adopt_tasks = _adopt_tasks,
-			.busy = _busy,
-			.create_task_enumerator = _create_task_enumerator,
-			.destroy = _destroy,
-		},
-		.ike_sa = ike_sa,
-		.initiating.type = EXCHANGE_TYPE_UNDEFINED,
-		.queued_tasks = linked_list_create(),
-		.active_tasks = linked_list_create(),
-		.passive_tasks = linked_list_create(),
-		.retransmit_tries = lib->settings->get_int(lib->settings,
-								"charon.retransmit_tries", RETRANSMIT_TRIES),
-		.retransmit_timeout = lib->settings->get_double(lib->settings,
-								"charon.retransmit_timeout", RETRANSMIT_TIMEOUT),
-		.retransmit_base = lib->settings->get_double(lib->settings,
-								"charon.retransmit_base", RETRANSMIT_BASE),
-	);
-
-	return &this->public;
+	return NULL;
 }