/*

* Copyright (c) 2005-2009 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description: 

*

*/

#include "CTCPTransport.h"

const int	KMaxIpAddressSize		= 30;

const int	KMaxPortSize			= 10;

const char	KSeparator[]			= { ":" };

CTCPTransport::CTCPTransport()

	: iSocket(INVALID_SOCKET)

	{

	}

CTCPTransport::~CTCPTransport()

	{

	WSACleanup();

	}

int CTCPTransport::Connect( const string &aDestination )

	{

	int ret = 0;

	// Extract the ipaddress andport number

	int offset = aDestination.find( KSeparator, 0 );

	if( offset == -1 )

		{

		return SOCKET_ERROR; // Find a better error code

		}

	char ipaddress[KMaxIpAddressSize];

	char port[KMaxPortSize];

	memset( ipaddress, 0, sizeof(ipaddress) );

	memset( port, 0, sizeof(port) );

	aDestination.copy( ipaddress, offset, 0 );

	aDestination.copy( port, aDestination.length()-offset, offset+1 );

	SOCKADDR_IN addr;

	addr.sin_family = AF_INET;

	addr.sin_port = htons( atoi(port) );

	addr.sin_addr.S_un.S_addr =  inet_addr( ipaddress );

	WORD version;

	WSADATA wsaData;

	version = MAKEWORD( 2, 2 );

	if( WSAStartup( version, &wsaData ) )

		{

		return WSAGetLastError();

		}

	// open the socket

	iSocket = socket( AF_INET, SOCK_STREAM, 0 );

	if( iSocket == INVALID_SOCKET )

		{

		return WSAGetLastError();

		}

	ret = connect( iSocket, (struct sockaddr*)&addr, sizeof(addr) );

	if( ret == SOCKET_ERROR )

		{

		return WSAGetLastError();

		}

	return 0;

	}

void CTCPTransport::Disconnect()

	{

	if( iSocket != INVALID_SOCKET )

		{

		closesocket( iSocket );

		iSocket = INVALID_SOCKET;

		}

	}

int CTCPTransport::RequestSend( const char* aData, const int aLength )

	{

	int bytes_sent_this_round;

	int total_bytes_to_send = aLength;

	int total_bytes_sent = 0;

	while( total_bytes_sent < total_bytes_to_send )

		{

		bytes_sent_this_round = send( iSocket, &(aData[total_bytes_sent]), total_bytes_to_send - total_bytes_sent, 0 );

		if( bytes_sent_this_round == SOCKET_ERROR )

			{

			return WSAGetLastError();

			}

		total_bytes_sent += bytes_sent_this_round;

		}

	return 0;

	}

int CTCPTransport::RequestReceive( char *aBuff, const int aLength )

	{

	int received_byte_count = 0;

	int bytes_to_receive = aLength;

	int bytes_received_this_round = 1;

	while( received_byte_count < bytes_to_receive )

		{

		bytes_received_this_round = recv( iSocket, &(aBuff[received_byte_count]), bytes_to_receive - received_byte_count, 0 );

		if( bytes_received_this_round == SOCKET_ERROR )

			{

			return WSAGetLastError();

			}

		else if( bytes_received_this_round == 0 )

			{

			return SOCKET_ERROR;

			}

		received_byte_count += bytes_received_this_round;

		}

	return 0;

	}