/*
 * 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 net
 *  @{
 */

/** @file
 *  Generic module functions implementation.
 */

#include <async.h>
#include <malloc.h>

#include <ipc/ipc.h>
#include <ipc/services.h>

#include <sys/time.h>

#include "err.h"
#include "modules.h"

/** The time between connect requests in microseconds.
 */
#define MODULE_WAIT_TIME	( 10 * 1000 )

int connect_to_service( services_t need ){
	return connect_to_service_timeout( need, 0 );
}

int connect_to_service_timeout( services_t need, suseconds_t timeout ){
	int	phone;
	int	res;

	while( true ){
		res = async_req_3_5( PHONE_NS, IPC_M_CONNECT_ME_TO, need, 0, 0, NULL, NULL, NULL, NULL, ( ipcarg_t * ) & phone );
		if(( res >= 0 ) && ( phone >= 0 )){
			return phone;
		}
		if( timeout > 0 ){
			timeout -= MODULE_WAIT_TIME;
			if( timeout <= 0 ) return ETIMEOUT;
		}
		usleep( MODULE_WAIT_TIME );
	}
}

int bind_service( services_t need, ipcarg_t arg1, ipcarg_t arg2, ipcarg_t arg3, async_client_conn_t client_receiver ){
	return bind_service_timeout( need, arg1, arg2, arg3, client_receiver, 0 );
}

int bind_service_timeout( services_t need, ipcarg_t arg1, ipcarg_t arg2, ipcarg_t arg3, async_client_conn_t client_receiver, suseconds_t timeout ){
	ERROR_DECLARE;

	int			phone;
	ipcarg_t	phonehash;

	phone = connect_to_service_timeout( need, timeout );
	if( phone >= 0 ){
		if( ERROR_OCCURRED( ipc_connect_to_me( phone, arg1, arg2, arg3, & phonehash ))){
			async_msg_0( phone, IPC_M_PHONE_HUNGUP );
			return ERROR_CODE;
		}
		async_new_connection( phonehash, 0, NULL, client_receiver );
	}
	return phone;
}

void answer_call( ipc_callid_t callid, int result, ipc_call_t * answer, int answer_count ){
	if( answer || ( ! answer_count )){
		switch( answer_count ){
			case 0:
				ipc_answer_0( callid, ( ipcarg_t ) result );
				break;
			case 1:
				ipc_answer_1( callid, ( ipcarg_t ) result, IPC_GET_ARG1( * answer ));
				break;
			case 2:
				ipc_answer_2( callid, ( ipcarg_t ) result, IPC_GET_ARG1( * answer ), IPC_GET_ARG2( * answer ));
				break;
			case 3:
				ipc_answer_3( callid, ( ipcarg_t ) result, IPC_GET_ARG1( * answer ), IPC_GET_ARG2( * answer ), IPC_GET_ARG3( * answer ));
				break;
			case 4:
				ipc_answer_4( callid, ( ipcarg_t ) result, IPC_GET_ARG1( * answer ), IPC_GET_ARG2( * answer ), IPC_GET_ARG3( * answer ), IPC_GET_ARG4( * answer ));
				break;
			case 5:
			default:
				ipc_answer_5( callid, ( ipcarg_t ) result, IPC_GET_ARG1( * answer ), IPC_GET_ARG2( * answer ), IPC_GET_ARG3( * answer ), IPC_GET_ARG4( * answer ), IPC_GET_ARG5( * answer ));
				break;
		}
	}
}

void refresh_answer( ipc_call_t * answer, int * answer_count ){
	if( answer_count ){
		* answer_count = 0;
	}
	if( answer ){
		IPC_SET_RETVAL( * answer, 0 );
		// just to be precize
		IPC_SET_METHOD( * answer, 0 );
		IPC_SET_ARG1( * answer, 0 );
		IPC_SET_ARG2( * answer, 0 );
		IPC_SET_ARG3( * answer, 0 );
		IPC_SET_ARG4( * answer, 0 );
		IPC_SET_ARG5( * answer, 0 );
	}
}

int data_receive( void ** data, size_t * length ){
	ERROR_DECLARE;

	ipc_callid_t	callid;

	if( !( data && length )) return EBADMEM;
	if( ! async_data_write_receive( & callid, length )) return EINVAL;
	* data = malloc( * length );
	if( !( * data )) return ENOMEM;
	if( ERROR_OCCURRED( async_data_write_finalize( callid, * data, * length ))){
		free( data );
		return ERROR_CODE;
	}
	return EOK;
}

int data_reply( void * data, size_t data_length ){
	size_t			length;
	ipc_callid_t	callid;

	if( ! async_data_read_receive( & callid, & length )){
		return EINVAL;
	}
	if( length < data_length ){
		async_data_read_finalize( callid, data, length );
		return EOVERFLOW;
	}
	return async_data_read_finalize( callid, data, data_length );
}

/** @}
 */