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/*
* Copyright (C) 2010 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 "tnccs_manager.h"
#include <debug.h>
#include <utils/linked_list.h>
#include <threading/rwlock.h>
typedef struct private_tnccs_manager_t private_tnccs_manager_t;
typedef struct tnccs_entry_t tnccs_entry_t;
typedef struct tnccs_connection_entry_t tnccs_connection_entry_t;
/**
* TNCCS constructor entry
*/
struct tnccs_entry_t {
/**
* TNCCS protocol type
*/
tnccs_type_t type;
/**
* constructor function to create instance
*/
tnccs_constructor_t constructor;
};
/**
* TNCCS connection entry
*/
struct tnccs_connection_entry_t {
/**
* TNCCS connection ID
*/
TNC_ConnectionID id;
/**
* TNCCS instance
*/
tnccs_t *tnccs;
/** TNCCS send message function
*
*/
tnccs_send_message_t send_message;
};
/**
* private data of tnccs_manager
*/
struct private_tnccs_manager_t {
/**
* public functions
*/
tnccs_manager_t public;
/**
* list of TNCCS protocol entries
*/
linked_list_t *protocols;
/**
* connection ID counter
*/
TNC_ConnectionID connection_id;
/**
* list of TNCCS connection entries
*/
linked_list_t *connections;
/**
* rwlock to lock TNCCS protocol and connection entries
*/
rwlock_t *lock;
};
METHOD(tnccs_manager_t, add_method, void,
private_tnccs_manager_t *this, tnccs_type_t type,
tnccs_constructor_t constructor)
{
tnccs_entry_t *entry = malloc_thing(tnccs_entry_t);
entry->type = type;
entry->constructor = constructor;
this->lock->write_lock(this->lock);
this->protocols->insert_last(this->protocols, entry);
this->lock->unlock(this->lock);
}
METHOD(tnccs_manager_t, remove_method, void,
private_tnccs_manager_t *this, tnccs_constructor_t constructor)
{
enumerator_t *enumerator;
tnccs_entry_t *entry;
this->lock->write_lock(this->lock);
enumerator = this->protocols->create_enumerator(this->protocols);
while (enumerator->enumerate(enumerator, &entry))
{
if (constructor == entry->constructor)
{
this->protocols->remove_at(this->protocols, enumerator);
free(entry);
}
}
enumerator->destroy(enumerator);
this->lock->unlock(this->lock);
}
METHOD(tnccs_manager_t, create_instance, tnccs_t*,
private_tnccs_manager_t *this, tnccs_type_t type, bool is_server)
{
enumerator_t *enumerator;
tnccs_entry_t *entry;
tnccs_t *protocol = NULL;
this->lock->read_lock(this->lock);
enumerator = this->protocols->create_enumerator(this->protocols);
while (enumerator->enumerate(enumerator, &entry))
{
if (type == entry->type)
{
protocol = entry->constructor(is_server);
if (protocol)
{
break;
}
}
}
enumerator->destroy(enumerator);
this->lock->unlock(this->lock);
return protocol;
}
METHOD(tnccs_manager_t, create_connection, TNC_ConnectionID,
private_tnccs_manager_t *this, tnccs_t *tnccs,
tnccs_send_message_t send_message)
{
tnccs_connection_entry_t *entry = malloc_thing(tnccs_connection_entry_t);
entry->id = ++this->connection_id;
entry->tnccs = tnccs;
entry->send_message = send_message;
this->lock->write_lock(this->lock);
this->connections->insert_last(this->connections, entry);
this->lock->unlock(this->lock);
DBG1(DBG_TNC, "assigned TNCCS Connection ID %u", entry->id);
return entry->id;
}
METHOD(tnccs_manager_t, remove_connection, void,
private_tnccs_manager_t *this, TNC_ConnectionID id)
{
enumerator_t *enumerator;
tnccs_connection_entry_t *entry;
this->lock->write_lock(this->lock);
enumerator = this->connections->create_enumerator(this->connections);
while (enumerator->enumerate(enumerator, &entry))
{
if (id == entry->id)
{
this->connections->remove_at(this->connections, enumerator);
free(entry);
DBG1(DBG_TNC, "removed TNCCS Connection ID %u", id);
}
}
enumerator->destroy(enumerator);
this->lock->unlock(this->lock);
}
METHOD(tnccs_manager_t, send_message, TNC_Result,
private_tnccs_manager_t *this, TNC_ConnectionID id,
TNC_BufferReference message,
TNC_UInt32 message_len,
TNC_MessageType message_type)
{
enumerator_t *enumerator;
tnccs_connection_entry_t *entry;
tnccs_send_message_t send_message;
tnccs_t *tnccs = NULL;
this->lock->write_lock(this->lock);
enumerator = this->connections->create_enumerator(this->connections);
while (enumerator->enumerate(enumerator, &entry))
{
if (id == entry->id)
{
tnccs = entry->tnccs;
send_message = entry->send_message;
break;
}
}
enumerator->destroy(enumerator);
this->lock->unlock(this->lock);
if (tnccs)
{
send_message(tnccs, message, message_len, message_type);
return TNC_RESULT_SUCCESS;
}
return TNC_RESULT_FATAL;
}
METHOD(tnccs_manager_t, destroy, void,
private_tnccs_manager_t *this)
{
this->protocols->destroy_function(this->protocols, free);
this->connections->destroy_function(this->connections, free);
this->lock->destroy(this->lock);
free(this);
}
/*
* See header
*/
tnccs_manager_t *tnccs_manager_create()
{
private_tnccs_manager_t *this;
INIT(this,
.public = {
.add_method = _add_method,
.remove_method = _remove_method,
.create_instance = _create_instance,
.create_connection = _create_connection,
.remove_connection = _remove_connection,
.send_message = _send_message,
.destroy = _destroy,
},
.protocols = linked_list_create(),
.connections = linked_list_create(),
.lock = rwlock_create(RWLOCK_TYPE_DEFAULT),
);
return &this->public;
}
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