// Copyright (c) 1997-2009 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:

// This file contains the implementation of the CSimNtRas class.

// 

//

/**

 @file

*/

#include "CSimNtras.h"

#include "Simlog.h"

_LIT8(KNtRasWriteText,"CLIENT");			// < Solicitation text, send to start the NTRas server

_LIT8(KNtRasReceiveText,"SERVER");			// < NTRas server response, indicating the PPP session can commence.

const TInt KNtRasServerResponseTimeout=5;	// < Connection attempt time out value in seconds.

const TDataBits KDefaultDataBits=EData8;	// < Default configuration is 8N1

const TParity KDefaultParity=EParityNone;	// < Default configuration is 8N1

const TStopBits KDefaultStopBits=EStop1;	// < Default configuration is 8N1

const TText8 KDefaultXon=17;				// < Default XON character is <ctrl>Q

const TText8 KDefaultXoff=19;				// < Default XOFF character is <ctrl>S

const TInt KTxMaxRetries=3;					// < Maximum number of transmit retries before giving up

CSimNtRas* CSimNtRas::NewL(CSimPhone* aPhone)

/**

 * Standard two phase constructor.

 */

	{

	CSimNtRas* self=new(ELeave) CSimNtRas(aPhone);

	CleanupStack::PushL(self);

	self->ConstructL();

	CleanupStack::Pop();

	return self;

	}

CSimNtRas::CSimNtRas(CSimPhone* aPhone)

	: iPhone(aPhone), iPortOpen(EFalse)

/**

 * Trivial first phase constructor.

 */

	{

	}

void CSimNtRas::ConstructL()

/**

 * Second phase constructor.  Create heap-based objects, in this instance the timer

 * and the Comm Port classes.

 */

	{

	iTimer=CSimTimer::NewL(iPhone);

	CommConstructL(CActive::EPriorityStandard,CActive::EPriorityStandard);

	}

CSimNtRas::~CSimNtRas()

/**

 * Standard destructor.  Close Comm Port and destroy heap-based objects.

 */

	{

	if(iPortOpen)

		{

		CommCancel();

		CommClose();

		}

	delete iTimer;

	}

TInt CSimNtRas::Connect(const TDesC& aCsyName, const TDesC& aPort,

						const TCommConfigV01& aConfig, MNTRasCallBack* aCallback)

/**

 * Attempt to connect to an NT Ras "Cable Connection" service.

 * @param aCsyName	The CSY to be used for the connection.

 * @param aPort		The Port to be used for the connection.

 * @param aConfig	The port configuration to be used for the connection.

 * @param aCallback	The callback class that must be signalled when the connection completes.

 * @return TInt		Standard error value.

 */

	{

	LOGDATA1("Starting to attempt a NT RAS Connection");

	iReadBuf.Zero();

	iInputBuf.Zero();

// Open and configuration the port

	TInt ret=CommOpen(aCsyName,aPort,ECommShared);

	if(ret!=KErrNone)

		return ret;

	iPortOpen=ETrue;

	TCommConfig configPckg;

	TCommConfigV01& config=configPckg();

	iCommPort.Config(configPckg);

	config.iDataBits=KDefaultDataBits;

	config.iParity=KDefaultParity;

	config.iStopBits=KDefaultStopBits;

	config.iXonChar=KDefaultXon;

	config.iXoffChar=KDefaultXoff;

	config.iTerminatorCount=0;

	config.iSpecialRate=0;

	config.iRate=aConfig.iRate;

	config.iHandshake=aConfig.iHandshake;

	ret=iCommPort.SetConfig(configPckg);

	if(ret!=KErrNone)

		return ret;

// Power up the port ready for receives and transmits

	CommReadReady();

	CommWriteReady();

	iAttemptCnt=0;

	iCallback=aCallback;

	CommReadOneOrMore(iReadBuf);

	AttemptConnect();

	return KErrNone;

	}

void CSimNtRas::AttemptConnect()

/**

 * Transmit "CLIENT" and attempt a connection

 */

	{

	LOGDATA1("NTRAS Writing CLIENT...");

	iAttemptCnt++;

	// Send the soliciting message, and await the NT Ras server's response.

	CommWrite(KNtRasWriteText);

	iTimer->Start(KNtRasServerResponseTimeout,this);

	}

void CSimNtRas::Cancel()

/**

 * Cancel any outstanding comm port reads, writes or timer requests.

 */

	{

	iTimer->Cancel();

	CommCancel();

	}

void CSimNtRas::Terminate()

/**

 * Terminate the NTRas connection.  If opened, cancel any outstanding requests and close

 * the port.  Also, cancel any outstanding timer request.

 */

	{

	if(iPortOpen)

		{

		CommCancel();

		CommClose();

		}

	iTimer->Cancel();

	}

void CSimNtRas::CommReadComplete(TInt aStatus)

/**

 * Serial port read completion callback.  If there's no read error, append the read

 * data to the input buffer and scan for the server's response.

 * If no match is found, re-post the read.

 * @param aStatus	Standard error value, indicating the result of the read request.

 */

	{

	LOGDATA2("NTRAS Rx Completion: %S",&iInputBuf);

	if(aStatus!=KErrNone)

		{

		iTimer->Cancel();

		iCallback->NTRasCallBack(aStatus);

		return;

		}

	if((iInputBuf.Length()+iReadBuf.Length())>KInputBufferSize)

		{

		iTimer->Cancel();

		iCallback->NTRasCallBack(KErrNotFound);

		return;

		}

	iInputBuf.Append(iReadBuf);

	TInt pos=iInputBuf.FindF(KNtRasReceiveText);

	if(pos>=0)

		{

		iTimer->Cancel();

		iCallback->NTRasCallBack(KErrNone);

		LOGDATA1("NTRAS Received SERVER!");

		return;

		}

	CommReadOneOrMore(iReadBuf);

	}

void CSimNtRas::CommWriteComplete(TInt aStatus)

/**

 * Serial port write completion callback.  Terminate the connection attempt if an error

 * has occurred.

 */

	{

	LOGDATA1("NTRAS Write Completion");

	if(aStatus!=KErrNone)

		{

		iTimer->Cancel();

		iCallback->NTRasCallBack(aStatus);

		}

	}

void CSimNtRas::TimerCallBack(TInt /*aId*/)

/**

 * Timer expired callback.  Give up the attempted connection with a time-out error.

 */

	{

	LOGDATA1("NTRAS Timeout Occurred");

	CommWriteCancel();

	if(iAttemptCnt<KTxMaxRetries)

		AttemptConnect();

	else

		{

		CommReadCancel();

		iCallback->NTRasCallBack(KErrTimedOut);

		}

	}