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/*
* Copyright (C) 2014 Andreas Steffen
* HSR 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 "imv_session_manager.h"
#include <threading/mutex.h>
typedef struct private_imv_session_manager_t private_imv_session_manager_t;
/**
* Private data of a imv_session_manager_t object.
*/
struct private_imv_session_manager_t {
/**
* Public imv_session_manager_t interface.
*/
imv_session_manager_t public;
/**
* Session list
*/
linked_list_t *sessions;
/**
* mutex used to lock session list
*/
mutex_t *mutex;
};
METHOD(imv_session_manager_t, add_session, imv_session_t*,
private_imv_session_manager_t *this, TNC_ConnectionID conn_id,
uint32_t ar_id_type, chunk_t ar_id_value)
{
enumerator_t *enumerator;
imv_session_t *current, *session = NULL;
time_t created;
this->mutex->lock(this->mutex);
/* check if a session has already been assigned */
enumerator = this->sessions->create_enumerator(this->sessions);
while (enumerator->enumerate(enumerator, ¤t))
{
if (conn_id == current->get_connection_id(current))
{
session = current;
break;
}
}
enumerator->destroy(enumerator);
/* session already exists */
if (session)
{
this->mutex->unlock(this->mutex);
return session->get_ref(session);
}
/* create a new session entry */
created = time(NULL);
session = imv_session_create(conn_id, created, ar_id_type, ar_id_value);
this->sessions->insert_last(this->sessions, session);
this->mutex->unlock(this->mutex);
return session;
}
METHOD(imv_session_manager_t, remove_session, void,
private_imv_session_manager_t *this, imv_session_t *session)
{
enumerator_t *enumerator;
imv_session_t *current;
this->mutex->lock(this->mutex);
enumerator = this->sessions->create_enumerator(this->sessions);
while (enumerator->enumerate(enumerator, ¤t))
{
if (current == session)
{
this->sessions->remove_at(this->sessions, enumerator);
break;
}
}
enumerator->destroy(enumerator);
this->mutex->unlock(this->mutex);
}
METHOD(imv_session_manager_t, destroy, void,
private_imv_session_manager_t *this)
{
this->sessions->destroy_offset(this->sessions,
offsetof(imv_session_t, destroy));
this->mutex->destroy(this->mutex);
free(this);
}
/**
* See header
*/
imv_session_manager_t *imv_session_manager_create(void)
{
private_imv_session_manager_t *this;
INIT(this,
.public = {
.add_session = _add_session,
.remove_session = _remove_session,
.destroy = _destroy,
},
.sessions = linked_list_create(),
.mutex = mutex_create(MUTEX_TYPE_DEFAULT),
);
return &this->public;
}
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