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-rw-r--r--Source/charon/ike_sa.c9
-rw-r--r--Source/charon/ike_sa.h8
-rw-r--r--Source/charon/ike_sa_id.c26
-rw-r--r--Source/charon/ike_sa_id.h21
-rw-r--r--Source/charon/ike_sa_manager.c542
-rw-r--r--Source/charon/ike_sa_manager.h65
6 files changed, 667 insertions, 4 deletions
diff --git a/Source/charon/ike_sa.c b/Source/charon/ike_sa.c
index 32c833cbe..a45e7d90f 100644
--- a/Source/charon/ike_sa.c
+++ b/Source/charon/ike_sa.c
@@ -114,6 +114,14 @@ static status_t process_configuration (private_ike_sa_t *this,configuration_t *c
}
/**
+ * @brief implements function private_ike_sa_t.get_id
+ */
+static ike_sa_id_t* get_id(private_ike_sa_t *this)
+{
+ return this->ike_sa_id;
+}
+
+/**
* @brief implements function destroy of private_ike_sa_t
*/
static status_t destroy (private_ike_sa_t *this)
@@ -147,6 +155,7 @@ ike_sa_t * ike_sa_create(ike_sa_id_t *ike_sa_id)
/* Public functions */
this->public.process_message = (status_t(*)(ike_sa_t*, message_t*)) process_message;
this->public.process_configuration = (status_t(*)(ike_sa_t*, configuration_t*)) process_configuration;
+ this->public.get_id = (ike_sa_id_t*(*)(ike_sa_t*)) get_id;
this->public.destroy = (status_t(*)(ike_sa_t*))destroy;
diff --git a/Source/charon/ike_sa.h b/Source/charon/ike_sa.h
index 75f09a74c..2c925c0ac 100644
--- a/Source/charon/ike_sa.h
+++ b/Source/charon/ike_sa.h
@@ -56,6 +56,14 @@ struct ike_sa_s {
* @return SUCCESSFUL if succeeded, FAILED otherwise
*/
status_t (*process_configuration) (ike_sa_t *this,configuration_t *configuration);
+
+ /**
+ * @brief Get the id of the SA
+ *
+ * @param this ike_sa_t-message_t object object
+ * @return ike_sa's ike_sa_id_t
+ */
+ ike_sa_id_t* (*get_id) (ike_sa_t *this);
/**
* @brief Destroys a ike_sa_t object
diff --git a/Source/charon/ike_sa_id.c b/Source/charon/ike_sa_id.c
index c8065e875..56cacced0 100644
--- a/Source/charon/ike_sa_id.c
+++ b/Source/charon/ike_sa_id.c
@@ -21,6 +21,7 @@
*/
#include <stdlib.h>
+#include <string.h>
#include <freeswan.h>
#include <pluto/constants.h>
#include <pluto/defs.h>
@@ -65,14 +66,16 @@ struct private_ike_sa_id_s {
*/
static status_t set_responder_spi (private_ike_sa_id_t *this, spi_t responder_spi)
{
- if (this == NULL)
- {
- return FAILED;
- }
this->responder_spi = responder_spi;
return SUCCESS;
}
+static status_t set_initiator_spi(private_ike_sa_id_t *this, spi_t initiator_spi)
+{
+ this->initiator_spi = initiator_spi;
+ return SUCCESS;
+}
+
/**
* @brief implements function initiator_spi_is_set of ike_sa_id_t
*/
@@ -134,6 +137,19 @@ status_t replace_values (private_ike_sa_id_t *this, private_ike_sa_id_t *other)
}
/**
+ * @brief implements function ike_sa_id_t.get_values
+ */
+static status_t get_values(private_ike_sa_id_t *this, spi_t *initiator, spi_t *responder, ike_sa_role_t *role)
+{
+ memcpy(initiator, &(this->initiator_spi), sizeof(initiator));
+ memcpy(responder, &(this->responder_spi), sizeof(responder));
+ *role = this->role;
+
+ return SUCCESS;
+}
+
+
+/**
* @brief implements function clone of ike_sa_id_t
*/
static status_t clone (private_ike_sa_id_t *this, ike_sa_id_t **clone_of_this)
@@ -174,10 +190,12 @@ ike_sa_id_t * ike_sa_id_create(spi_t initiator_spi, spi_t responder_spi, ike_sa_
/* Public functions */
this->public.set_responder_spi = (status_t(*)(ike_sa_id_t*,spi_t)) set_responder_spi;
+ this->public.set_initiator_spi = (status_t(*)(ike_sa_id_t*,spi_t)) set_initiator_spi;
this->public.responder_spi_is_set = (bool(*)(ike_sa_id_t*)) responder_spi_is_set;
this->public.initiator_spi_is_set = (bool(*)(ike_sa_id_t*)) initiator_spi_is_set;
this->public.equals = (status_t(*)(ike_sa_id_t*,ike_sa_id_t*,bool*)) equals;
this->public.replace_values = (status_t(*)(ike_sa_id_t*,ike_sa_id_t*)) replace_values;
+ this->public.get_values = (status_t(*)(ike_sa_id_t*,spi_t*,spi_t*,ike_sa_role_t*)) get_values;
this->public.clone = (status_t(*)(ike_sa_id_t*,ike_sa_id_t**)) clone;
this->public.destroy = (status_t(*)(ike_sa_id_t*))destroy;
diff --git a/Source/charon/ike_sa_id.h b/Source/charon/ike_sa_id.h
index 3b83672be..eaaa8112b 100644
--- a/Source/charon/ike_sa_id.h
+++ b/Source/charon/ike_sa_id.h
@@ -51,6 +51,16 @@ struct ike_sa_id_s {
* @return SUCCESSFUL if succeeded, FAILED otherwise
*/
status_t (*set_responder_spi) (ike_sa_id_t *this, spi_t responder_spi);
+
+ /**
+ * @brief Sets the SPI of the initiator.
+ *
+ *
+ * @param this ike_sa_id_t-object
+ * @param initiator_spi SPI to set
+ * @return SUCCESSFUL if succeeded, FAILED otherwise
+ */
+ status_t (*set_initiator_spi) (ike_sa_id_t *this, spi_t initiator_spi);
/**
* @brief Returns TRUE if the initiator spi is set (not zero)
@@ -89,6 +99,17 @@ struct ike_sa_id_s {
status_t (*replace_values) (ike_sa_id_t *this,ike_sa_id_t *other);
/**
+ * @brief get spis and role of an ike_sa_id
+ *
+ * @param this ike_sa_id_t-object
+ * @param initiator address to write initator spi
+ * @param responder address to write responder spi
+ * @param role address to write role
+ * @return SUCCESSFUL if succeeded, FAILED otherwise
+ */
+ status_t (*get_values) (ike_sa_id_t *this, spi_t *initiator, spi_t *responder, ike_sa_role_t *role);
+
+ /**
* @brief Clones a given ike_sa_id_t-object
*
* @param this ike_sa_id_t-object
diff --git a/Source/charon/ike_sa_manager.c b/Source/charon/ike_sa_manager.c
new file mode 100644
index 000000000..3fbe501c2
--- /dev/null
+++ b/Source/charon/ike_sa_manager.c
@@ -0,0 +1,542 @@
+/**
+ * @file ike_sa_manager.c
+ *
+ * @brief Central point for managing IKE-SAs (creation, locking, deleting...)
+ *
+ */
+
+/*
+ * Copyright (C) 2005 Jan Hutter, Martin Willi
+ * Hochschule fuer Technik Rapperswil
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * for more details.
+ */
+
+#include <pthread.h>
+#include <string.h>
+
+#include "ike_sa_manager.h"
+#include "linked_list.h"
+#include "ike_sa_id.h"
+
+/**
+ * @brief An entry in the linked list, contains IKE_SA, locking and lookup data.
+ */
+typedef struct ike_sa_entry_s ike_sa_entry_t;
+struct ike_sa_entry_s {
+ /**
+ * destructor, recursivly destroys ike_sa
+ */
+ status_t (*destroy) (ike_sa_entry_t *this);
+ /**
+ * Number of threads waiting for this ike_sa
+ */
+ int waiting_threads;
+ /**
+ * is this SA flagged for deleting ?
+ */
+ pthread_cond_t condvar;
+ /**
+ * is this ike_sa currently checked out?
+ */
+ bool checked_out;
+ /**
+ * identifiaction of ike_sa (SPIs)
+ */
+ ike_sa_id_t *ike_sa_id;
+ /**
+ * the contained ike_sa
+ */
+ ike_sa_t *ike_sa;
+};
+
+static status_t ike_sa_entry_destroy(ike_sa_entry_t *this)
+{
+ this->ike_sa->destroy(this->ike_sa);
+ this->ike_sa_id->destroy(this->ike_sa_id);
+ pfree(this);
+ return SUCCESS;
+
+}
+
+
+/**
+ * @brief creates a new entry for the ike_sa list
+ *
+ * This constructor additionaly creates a new and empty SA
+ *
+ * @param ike_sa_id the associated ike_sa_id_t, NOT cloned
+ * @return created entry, with ike_sa and ike_sa_id
+ */
+ike_sa_entry_t *ike_sa_entry_create(ike_sa_id_t *ike_sa_id)
+{
+ ike_sa_entry_t *this = alloc_thing(ike_sa_entry_t, "ike_sa_entry_t");
+
+ this->destroy = ike_sa_entry_destroy;
+ this->waiting_threads = 0;
+ pthread_cond_init(&(this->condvar), NULL);
+ /* we set checkout flag when we really give it out */
+ this->checked_out = FALSE;
+ this->ike_sa_id = ike_sa_id;
+ this->ike_sa = ike_sa_create(ike_sa_id);
+ return this;
+}
+
+/**
+ * Additional private members to ike_sa_manager_t
+ */
+typedef struct private_ike_sa_manager_s private_ike_sa_manager_t;
+struct private_ike_sa_manager_s {
+ /**
+ * Public members
+ */
+ ike_sa_manager_t public;
+
+ /**
+ * @brief get next spi
+ *
+ * we give out SPIs incremental
+ *
+ * @param this the ike_sa_manager
+ * @param spi[out] spi will be written here
+ * @return SUCCESS or,
+ * OUT_OF_RES when we already served 2^64 SPIs ;-)
+ */
+ status_t (*get_next_spi) (private_ike_sa_manager_t *this, spi_t *spi);
+ /**
+ * @brief find the ike_sa_entry in the list by SPIs
+ *
+ * This function simply iterates over the linked list. A hash-table
+ * would be more efficient when storing a lot of IKE_SAs...
+ *
+ * @param this the ike_sa_manager containing the list
+ * @param ike_sa_id id of the ike_sa, containing SPIs
+ * @param entry[out] pointer to set to the found entry
+ * @return SUCCESS when found,
+ * NOT_FOUND when no such ike_sa_id in list
+ */
+ status_t (*get_entry_by_id) (private_ike_sa_manager_t *this, ike_sa_id_t *ike_sa_id, ike_sa_entry_t **entry);
+ /**
+ * @brief find the ike_sa_entry in the list by pointer to SA.
+ *
+ * This function simply iterates over the linked list. A hash-table
+ * would be more efficient when storing a lot of IKE_SAs...
+ *
+ * @param this the ike_sa_manager containing the list
+ * @param ike_sad pointer to the ike_sa
+ * @param entry[out] pointer to set to the found entry
+ * @return SUCCESS when found,
+ * NOT_FOUND when no such ike_sa_id in list
+ */
+ status_t (*get_entry_by_sa) (private_ike_sa_manager_t *this, ike_sa_t *ike_sa, ike_sa_entry_t **entry);
+ /**
+ * @brief
+ */
+ status_t (*delete_entry) (private_ike_sa_manager_t *this, ike_sa_entry_t *entry);
+ /**
+ * lock for exclusivly accessing the manager
+ */
+ pthread_mutex_t mutex;
+
+ /**
+ * Linked list with entries for the ike_sa
+ */
+ linked_list_t *list;
+ /**
+ * Next SPI, needed for incremental creation of SPIs
+ */
+ spi_t next_spi;
+};
+
+
+/**
+ * @see private_ike_sa_manager_t.get_ike_sa_entry
+ */
+static status_t get_ike_sa_entry_by_id(private_ike_sa_manager_t *this, ike_sa_id_t *ike_sa_id, ike_sa_entry_t **entry)
+{
+ linked_list_t *list = this->list;
+ linked_list_iterator_t *iterator;
+ list->create_iterator(list, &iterator, TRUE);
+ while (iterator->has_next(iterator))
+ {
+ ike_sa_entry_t *current;
+ bool are_equal = FALSE;
+ iterator->current(iterator, (void**)&current);
+ current->ike_sa_id->equals(current->ike_sa_id, ike_sa_id, &are_equal);
+ if (are_equal)
+ {
+ *entry = current;
+ iterator->destroy(iterator);
+ return SUCCESS;
+ }
+ }
+ iterator->destroy(iterator);
+ return NOT_FOUND;
+}
+
+/**
+ * @see private_ike_sa_manager_t.get_ike_sa_entry_by_sa
+ */
+static status_t get_ike_sa_entry_by_sa(private_ike_sa_manager_t *this, ike_sa_t *ike_sa, ike_sa_entry_t **entry)
+{
+ linked_list_t *list = this->list;
+ linked_list_iterator_t *iterator;
+ list->create_iterator(list, &iterator, TRUE);
+ while (iterator->has_next(iterator))
+ {
+ ike_sa_entry_t *current;
+ iterator->current(iterator, (void**)&current);
+ if (current->ike_sa == ike_sa)
+ {
+ *entry = current;
+ iterator->destroy(iterator);
+ return SUCCESS;
+ }
+ }
+ iterator->destroy(iterator);
+ return NOT_FOUND;
+}
+
+
+/**
+ * @see private_ike_sa_manager_t.get_next_spi
+ */
+static status_t get_next_spi(private_ike_sa_manager_t *this, spi_t *spi)
+{
+ this->next_spi.low ++;
+ if (this->next_spi.low == 0) {
+ /* overflow of lower int in spi */
+ this->next_spi.high ++;
+ if (this->next_spi.high == 0) {
+ /* our software ran so incredible stable, we have no more
+ * SPIs to give away :-/. */
+ return OUT_OF_RES;
+ }
+ }
+ *spi = this->next_spi;
+ return SUCCESS;
+}
+
+
+/**
+ * @see ike_sa_manager_s.checkout_ike_sa
+ */
+static status_t checkout_ike_sa(private_ike_sa_manager_t *this, ike_sa_id_t *ike_sa_id, ike_sa_t **ike_sa)
+{
+ bool responder_spi_set;
+ bool initiator_spi_set;
+ status_t retval;
+
+ pthread_mutex_lock(&(this->mutex));
+
+ responder_spi_set = ike_sa_id->responder_spi_is_set(ike_sa_id);
+ initiator_spi_set = ike_sa_id->initiator_spi_is_set(ike_sa_id);
+
+ if (initiator_spi_set && responder_spi_set)
+ {
+ /* we SHOULD have an IKE_SA for these SPIs in the list,
+ * if not, we cant handle the request...
+ */
+ ike_sa_entry_t *entry;
+ /* look for the entry */
+ if (this->get_entry_by_id(this, ike_sa_id, &entry) == SUCCESS)
+ {
+ /* is this IKE_SA already checked out ?? */
+ while (entry->checked_out)
+ {
+ /* so wait until we can get it for us.
+ * we register us as waiting.
+ */
+ entry->waiting_threads++;
+ pthread_cond_wait(&(entry->condvar), &(this->mutex));
+ entry->waiting_threads--;
+ }
+ /* ok, this IKE_SA is finally ours */
+ entry->checked_out = TRUE;
+ *ike_sa = entry->ike_sa;
+ /* DON'T use return, we must unlock the mutex! */
+ retval = SUCCESS;
+
+ }
+ else
+ {
+ /* looks like there is no such IKE_SA, better luck next time... */
+
+ /* DON'T use return, we must unlock the mutex! */
+ retval = NOT_FOUND;
+ }
+ }
+ else if (initiator_spi_set && !responder_spi_set)
+ {
+ /* an IKE_SA_INIT from an another endpoint,
+ * he is the initiator.
+ * For simplicity, we do NOT check for retransmitted
+ * IKE_SA_INIT-Requests here, so EVERY single IKE_SA_INIT-
+ * Request (even a retransmitted one) will result in a
+ * IKE_SA. This could be improved...
+ */
+ spi_t responder_spi;
+ ike_sa_id_t *new_ike_sa_id;
+ ike_sa_entry_t *new_ike_sa_entry;
+
+ /* set SPIs, we are the responder */
+ ike_sa_id->clone(ike_sa_id, &new_ike_sa_id);
+ this->get_next_spi(this, &responder_spi);
+ new_ike_sa_id->set_responder_spi(new_ike_sa_id, responder_spi);
+ /* we also set arguments spi, so its still valid */
+ ike_sa_id->set_responder_spi(ike_sa_id, responder_spi);
+
+ /* create entry */
+ new_ike_sa_entry = ike_sa_entry_create(new_ike_sa_id);
+ this->list->insert_last(this->list, new_ike_sa_entry);
+
+ /* check ike_sa out */
+ new_ike_sa_entry->checked_out = TRUE;
+ *ike_sa = new_ike_sa_entry->ike_sa;
+
+ /* DON'T use return, we must unlock the mutex! */
+ retval = SUCCESS;
+ }
+ else if (!initiator_spi_set && !responder_spi_set)
+ {
+ /* creation of an IKE_SA from local site,
+ * we are the initiator!
+ */
+ spi_t initiator_spi, responder_spi;
+ ike_sa_id_t *new_ike_sa_id;
+ ike_sa_entry_t *new_ike_sa_entry;
+
+ /* set SPIs */
+ memset(&responder_spi, 0, sizeof(spi_t));
+ this->get_next_spi(this, &initiator_spi);
+
+ /* we also set arguments SPI, so its still valid */
+ ike_sa_id->set_initiator_spi(ike_sa_id, initiator_spi);
+
+ /* create entry */
+ new_ike_sa_id = ike_sa_id_create(initiator_spi, responder_spi, INITIATOR);
+ new_ike_sa_entry = ike_sa_entry_create(new_ike_sa_id);
+ this->list->insert_last(this->list, new_ike_sa_entry);
+
+ /* check ike_sa out */
+ new_ike_sa_entry->checked_out = TRUE;
+ *ike_sa = new_ike_sa_entry->ike_sa;
+
+ /* DON'T use return, we must unlock the mutex! */
+ retval = SUCCESS;
+ }
+ else
+ {
+ /* responder set, initiator not: here is something seriously wrong! */
+
+ /* DON'T use return, we must unlock the mutex! */
+ retval = INVALID_ARG;
+ }
+
+ pthread_mutex_unlock(&(this->mutex));
+ /* OK, unlocked... */
+ return retval;
+}
+
+static status_t checkin_ike_sa(private_ike_sa_manager_t *this, ike_sa_t *ike_sa)
+{
+ /* to check the SA back in, we look for the pointer of the ike_sa
+ * in all entries.
+ * We can't search by SPI's since the MAY have changed (e.g. on reception
+ * of a IKE_SA_INIT response). Updating of the SPI MAY be necessary...
+ */
+ status_t retval;
+ ike_sa_entry_t *entry;
+
+ pthread_mutex_lock(&(this->mutex));
+
+
+ /* look for the entry */
+ if (this->get_entry_by_sa(this, ike_sa, &entry) == SUCCESS)
+ {
+ /* ike_sa_id must be updated */
+ entry->ike_sa_id->replace_values(entry->ike_sa_id, ike_sa->get_id(ike_sa));
+ /* signal waiting threads */
+ entry->checked_out = FALSE;
+ pthread_cond_signal(&(entry->condvar));
+ retval = SUCCESS;
+ }
+ else
+ {
+ /* this SA is no more, this REALLY should not happen */
+ retval = NOT_FOUND;
+ }
+ pthread_mutex_unlock(&(this->mutex));
+ return retval;
+}
+
+
+
+static status_t delete_ike_sa_by_sa(private_ike_sa_manager_t *this, ike_sa_t *ike_sa)
+{
+ /* deletion is a bit complex, we must garant that no thread is waiting for
+ * this SA.
+ * We take this SA from the list, and start signaling while threads
+ * are in the condvar.
+ */
+ linked_list_t *list = this->list;
+ linked_list_iterator_t *iterator;
+ ike_sa_entry_t *entry;
+ bool found = FALSE;
+ status_t retval;
+
+ pthread_mutex_lock(&(this->mutex));
+
+ /* remove SA from list */
+ list->create_iterator(list, &iterator, TRUE);
+ while (iterator->has_next(iterator))
+ {
+ iterator->current(iterator, (void**)&entry);
+ if (entry->ike_sa == ike_sa)
+ {
+ list->remove(list, iterator);
+ found = TRUE;
+ break;
+ }
+ }
+ iterator->destroy(iterator);
+
+ if (found)
+ {
+ /* wait until all workers have done their work */
+ while (entry->waiting_threads)
+ {
+ /* wake up all */
+ pthread_cond_signal(&(entry->condvar));
+ /* and the nice thing, they will wake us again when their work is done */
+ pthread_cond_wait(&(entry->condvar), &(this->mutex));
+ }
+
+ /* ok, we are alone now, no threads waiting in the entry's condvar */
+ entry->destroy(entry);
+ retval = SUCCESS;
+ }
+ else
+ {
+ retval = NOT_FOUND;
+ }
+
+ pthread_mutex_unlock(&(this->mutex));
+ return retval;
+}
+
+static status_t delete_ike_sa_by_id(private_ike_sa_manager_t *this, ike_sa_id_t *ike_sa_id)
+{
+ /* deletion is a bit complex, we must garant that no thread is waiting for
+ * this SA.
+ * We take this SA from the list, and start signaling while threads
+ * are in the condvar.
+ */
+ linked_list_t *list = this->list;
+ linked_list_iterator_t *iterator;
+ ike_sa_entry_t *entry;
+ bool found = FALSE;
+ status_t retval;
+
+ pthread_mutex_lock(&(this->mutex));
+
+ /* remove SA from list */
+ list->create_iterator(list, &iterator, TRUE);
+ while (iterator->has_next(iterator))
+ {
+ bool are_equal = FALSE;
+ iterator->current(iterator, (void**)&entry);
+ entry->ike_sa_id->equals(entry->ike_sa_id, ike_sa_id, &are_equal);
+ if (are_equal)
+ {
+ list->remove(list, iterator);
+ found = TRUE;
+ break;
+ }
+ }
+ iterator->destroy(iterator);
+
+ if (found)
+ {
+ /* wait until all workers have done their work */
+ while (entry->waiting_threads)
+ {
+ /* wake up all */
+ pthread_cond_signal(&(entry->condvar));
+ /* and the nice thing, they will wake us again when their work is done */
+ pthread_cond_wait(&(entry->condvar), &(this->mutex));
+ }
+
+ /* ok, we are alone now, no threads waiting in the entry's condvar */
+ entry->destroy(entry);
+ retval = SUCCESS;
+ }
+ else
+ {
+ retval = NOT_FOUND;
+ }
+
+ pthread_mutex_unlock(&(this->mutex));
+ return retval;
+}
+
+static status_t destroy(private_ike_sa_manager_t *this)
+{
+ /* destroy all list entries */
+ linked_list_t *list = this->list;
+ linked_list_iterator_t *iterator;
+ list->create_iterator(list, &iterator, TRUE);
+ while (iterator->has_next(iterator))
+ {
+ ike_sa_entry_t *entry;
+ iterator->current(iterator, (void**)&entry);
+ entry->destroy(entry);
+ }
+ iterator->destroy(iterator);
+
+ list->destroy(list);
+
+ pfree(this);
+
+ return SUCCESS;
+}
+
+
+ike_sa_manager_t *ike_sa_manager_create()
+{
+ private_ike_sa_manager_t *this = alloc_thing(private_ike_sa_manager_t, "private_ike_sa_manager_t");
+
+ /* assign public functions */
+ this->public.destroy = (status_t(*)(ike_sa_manager_t*))destroy;
+ this->public.checkout_ike_sa = (status_t(*)(ike_sa_manager_t*, ike_sa_id_t *sa_id, ike_sa_t **sa))checkout_ike_sa;
+ this->public.checkin_ike_sa = (status_t(*)(ike_sa_manager_t*, ike_sa_t *sa))checkin_ike_sa;
+ this->public.delete_ike_sa_by_id = (status_t(*)(ike_sa_manager_t*, ike_sa_id_t *sa_id))delete_ike_sa_by_id;
+ this->public.delete_ike_sa_by_sa = (status_t(*)(ike_sa_manager_t*, ike_sa_t *ike_sa))delete_ike_sa_by_sa;
+
+ /* initialize private data */
+ this->get_next_spi = get_next_spi;
+ this->get_entry_by_sa = get_ike_sa_entry_by_sa;
+ this->get_entry_by_id = get_ike_sa_entry_by_id;
+
+ this->list = linked_list_create();
+ if (this->list == NULL)
+ {
+ pfree(this);
+ return NULL;
+ }
+
+ pthread_mutex_init(&(this->mutex), NULL);
+
+ this->next_spi.low = 1;
+ this->next_spi.high = 0;
+
+ return (ike_sa_manager_t*)this;
+}
diff --git a/Source/charon/ike_sa_manager.h b/Source/charon/ike_sa_manager.h
new file mode 100644
index 000000000..ffd9d95cf
--- /dev/null
+++ b/Source/charon/ike_sa_manager.h
@@ -0,0 +1,65 @@
+/**
+ * @file ike_sa_manager.h
+ *
+ * @brief Central point for managing IKE-SAs (creation, locking, deleting...)
+ *
+ */
+
+/*
+ * Copyright (C) 2005 Jan Hutter, Martin Willi
+ * Hochschule fuer Technik Rapperswil
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * for more details.
+ */
+
+#ifndef IKE_SA_MANAGER_H_
+#define IKE_SA_MANAGER_H_
+
+#include "types.h"
+#include "ike_sa.h"
+
+
+/**
+ * @brief The IKE_SA-Manager manages the IKE_SAs ;-).
+ *
+ * To avoid access from multiple threads, IKE_SAs must be checked out from
+ * the manager, and checked back in after usage.
+ * The manager also handles deletion of SAs.
+ *
+ */
+typedef struct ike_sa_manager_s ike_sa_manager_t;
+struct ike_sa_manager_s {
+
+ status_t (*checkout_ike_sa) (ike_sa_manager_t*, ike_sa_id_t *sa_id, ike_sa_t **ike_sa);
+ status_t (*checkin_ike_sa) (ike_sa_manager_t*, ike_sa_t *ike_sa);
+ status_t (*delete_ike_sa_by_id) (ike_sa_manager_t*, ike_sa_id_t *ike_sa_id);
+ status_t (*delete_ike_sa_by_sa) (ike_sa_manager_t*, ike_sa_t *ike_sa);
+
+ /**
+ * @brief Destroys a linked_list object
+ *
+ * @warning all items are removed before deleting the list. The
+ * associated values are NOT destroyed.
+ * Destroying an list which is not empty may cause
+ * memory leaks!
+ *
+ * @param linked_list calling object
+ * @returns SUCCESS if succeeded, FAILED otherwise
+ */
+ status_t (*destroy) (ike_sa_manager_t *isam);
+};
+
+/**
+ * @brief Create the IKE_SA-Manager
+ */
+ike_sa_manager_t *ike_sa_manager_create();
+
+#endif /*IKE_SA_MANAGER_H_*/
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