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/*

 * Copyright (c) 2009 Lukas Mejdrech

 * All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 *

 * - Redistributions of source code must retain the above copyright

 *   notice, this list of conditions and the following disclaimer.

 * - Redistributions in binary form must reproduce the above copyright

 *   notice, this list of conditions and the following disclaimer in the

 *   documentation and/or other materials provided with the distribution.

 * - The name of the author may not be used to endorse or promote products

 *   derived from this software without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR

 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES

 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.

 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,

 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT

 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF

 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 */

/** @addtogroup netif

 *  @{

 */

/** @file

 */

#include <async.h>

#include <mem.h>

#include <rwlock.h>

#include <stdio.h>

#include <ipc/ipc.h>

#include <ipc/services.h>

#include "../err.h"

#include "../messages.h"

#include "../modules.h"

#include "../structures/packet/packet.h"

#include "../structures/packet/packet_client.h"

#include "../structures/measured_strings.h"

#include "../include/device.h"

#include "../include/netif_interface.h"

#include "../include/nil_interface.h"

#include "netif.h"

#include "netif_messages.h"

#include "netif_module.h"

extern netif_globals_t netif_globals;

DEVICE_MAP_IMPLEMENT( device_map, device_t )

int	register_message( device_id_t device_id, int phone );

int	netif_probe_req( int netif_phone, device_id_t device_id, int irq, int io ){

	int	result;

	rwlock_write_lock( & netif_globals.lock );

	result = netif_probe_message( device_id, irq, io );

	rwlock_write_unlock( & netif_globals.lock );

	return result;

}

int	netif_send_msg( int netif_phone, device_id_t device_id, packet_t packet, services_t sender ){

	int	result;

	rwlock_write_lock( & netif_globals.lock );

	result = netif_send_message( device_id, packet, sender );

	rwlock_write_unlock( & netif_globals.lock );

	return result;

}

int	netif_start_req( int netif_phone, device_id_t device_id ){

	ERROR_DECLARE;

	device_ref	device;

	int	result;

	int	phone;

	rwlock_write_lock( & netif_globals.lock );

	if( ERROR_OCCURRED( find_device( device_id, & device ))){

		rwlock_write_unlock( & netif_globals.lock );

		return ERROR_CODE;

	}

	result = netif_start_message( device );

	if( result > NETIF_NULL ){

		phone = device->nil_phone;

		rwlock_write_unlock( & netif_globals.lock );

		nil_device_state_msg( phone, device_id, result );

		return EOK;

	}else{

		rwlock_write_unlock( & netif_globals.lock );

	}

	return result;

}

int	netif_stop_req( int netif_phone, device_id_t device_id ){

	ERROR_DECLARE;

	device_ref	device;

	int	result;

	int	phone;

	rwlock_write_lock( & netif_globals.lock );

	if( ERROR_OCCURRED( find_device( device_id, & device ))){

		rwlock_write_unlock( & netif_globals.lock );

		return ERROR_CODE;

	}

	result = netif_stop_message( device );

	if( result > NETIF_NULL ){

		phone = device->nil_phone;

		rwlock_write_unlock( & netif_globals.lock );

		nil_device_state_msg( phone, device_id, result );

		return EOK;

	}else{

		rwlock_write_unlock( & netif_globals.lock );

	}

	return result;

}

int	netif_get_addr( int netif_phone, device_id_t device_id, measured_string_ref * address, char ** data ){

	ERROR_DECLARE;

	measured_string_t	translation;

	if( !( address && data )) return EBADMEM;

	rwlock_read_lock( & netif_globals.lock );

	if( ! ERROR_OCCURRED( netif_get_addr_message( device_id, & translation ))){

		* address = measured_string_copy( & translation );

		ERROR_CODE = ( * address ) ? EOK : ENOMEM;

	}

	rwlock_read_unlock( & netif_globals.lock );

	* data = ( ** address ).value;

	return ERROR_CODE;

}

int netif_bind_service( services_t service, device_id_t device_id, services_t me, async_client_conn_t receiver ){

	return EOK;

}

int find_device( device_id_t device_id, device_ref * device ){

	if( ! device ) return EBADMEM;

	* device = device_map_find( & netif_globals.device_map, device_id );

	if( ! * device ) return ENOENT;

	if(( ** device ).state == NETIF_NULL ) return EPERM;

	return EOK;

}

void null_device_stats( device_stats_ref stats ){

	bzero( stats, sizeof( device_stats_t ));

}

int register_message( device_id_t device_id, int phone ){

	ERROR_DECLARE;

	device_ref	device;

	ERROR_PROPAGATE( find_device( device_id, & device ));

	if( device->nil_phone > 0 ) return ELIMIT;

	device->nil_phone = phone;

	printf( "New receiver of the device %d registered:\n\tphone\t= %d\n", device->device_id, device->nil_phone );

	return EOK;

}

int netif_message( ipc_callid_t callid, ipc_call_t * call, ipc_call_t * answer, int * answer_count ){

	ERROR_DECLARE;

	size_t				length;

	device_stats_t		stats;

	packet_t			packet;

	measured_string_t	address;

//	printf( "message %d - %d\n", IPC_GET_METHOD( * call ), NET_NETIF_FIRST );

	* answer_count = 0;

	switch( IPC_GET_METHOD( * call )){

		case IPC_M_PHONE_HUNGUP:

			return EOK;

		case NET_NETIF_PROBE_AUTO:

			rwlock_write_lock( & netif_globals.lock );

			ERROR_CODE = netif_probe_auto_message();

			rwlock_write_unlock( & netif_globals.lock );

			return ERROR_CODE;

		case NET_NETIF_PROBE:

			return netif_probe_req( 0, IPC_GET_DEVICE( call ), NETIF_GET_IRQ( call ), NETIF_GET_IO( call ));

		case IPC_M_CONNECT_TO_ME:

			rwlock_write_lock( & netif_globals.lock );

			ERROR_CODE = register_message( IPC_GET_DEVICE( call ), IPC_GET_PHONE( call ));

			rwlock_write_unlock( & netif_globals.lock );

			return ERROR_CODE;

		case NET_NETIF_SEND:

		case NET_NIL_SEND:

			ERROR_PROPAGATE( packet_translate( netif_globals.net_phone, & packet, IPC_GET_PACKET( call )));

			return netif_send_msg( 0, IPC_GET_DEVICE( call ), packet, IPC_GET_SENDER( call ));

		case NET_NETIF_START:

			return netif_start_req( 0, IPC_GET_DEVICE( call ));

		case NET_NETIF_STATS:

			rwlock_read_lock( & netif_globals.lock );

			if( ! ERROR_OCCURRED( ipc_data_read_receive( & callid, & length ))){

				if( length < sizeof( device_stats_t )){

					ERROR_CODE = EOVERFLOW;

				}else{

					if( ! ERROR_OCCURRED( netif_get_device_stats( IPC_GET_DEVICE( call ), & stats ))){

						ERROR_CODE = ipc_data_read_finalize( callid, & stats, sizeof( device_stats_t ));

					}

				}

			}

			rwlock_read_unlock( & netif_globals.lock );

			return ERROR_CODE;

		case NET_NETIF_STOP:

			return netif_stop_req( 0, IPC_GET_DEVICE( call ));

		case NET_NETIF_GET_ADDR:

		case NET_NIL_ADDR:

			rwlock_read_lock( & netif_globals.lock );

			if( ! ERROR_OCCURRED( netif_get_addr_message( IPC_GET_DEVICE( call ), & address ))){

				ERROR_CODE = measured_strings_reply( & address, 1 );

			}

			rwlock_read_unlock( & netif_globals.lock );

			return ERROR_CODE;

	}

	return netif_specific_message( callid, call, answer, answer_count );

}

int netif_init_module( async_client_conn_t client_connection ){

	ERROR_DECLARE;

	async_set_client_connection( client_connection );

	netif_globals.net_phone = connect_to_service( SERVICE_NETWORKING );

	device_map_initialize( & netif_globals.device_map );

	ERROR_PROPAGATE( pm_init());

	rwlock_initialize( & netif_globals.lock );

	if( ERROR_OCCURRED( netif_initialize())){

		pm_destroy();

		return ERROR_CODE;

	}

	return EOK;

}

int netif_run_module( void ){

	async_manager();

	pm_destroy();

	return EOK;

}

void netif_pq_release( packet_id_t packet_id ){

	pq_release( netif_globals.net_phone, packet_id );

}

packet_t netif_packet_get_1( size_t content ){

	return packet_get_1( netif_globals.net_phone, content );

}

/** @}

 */