// 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:

// NetDial Serial IO Functions

// 

//

/**

 @file Sio.cpp 

*/

#include "SSCREXEC.H"

#include "SIO.H"

#include <networking/bca.h>

const TInt KChatterPriority=0;

const TInt KCommReadPriority=10;

const TInt KCommWritePriority=20;

const TInt KChatBufferSize=64;

const TInt KWriteTimeOutSec=6;

const TInt KOneSecInMicroSecs=1000000;

const TInt KPreSendPauseTimeMicroSec=200000;

const TInt KClockTick=15500;

const TReal KTRealOneSecInMicroSecs=1E6;

// CScriptIO definitions 

CScriptIO* CScriptIO::NewL(CScriptExecutor* aScriptExecutor, const TDesC& aCommsChannel)

/**

2 phased constructor for CScriptIO, first phase.

@param aScriptExecutor a pointer to script executor.

@param aCommPort a reference to COMM port.

@exception Leaves if ConstructL() leaves, or not enough memory is available.

@return a new CScriptIO object.

*/

	{

	CScriptIO* c=new(ELeave) CScriptIO(aScriptExecutor);

	CleanupStack::PushL(c);

	c->ConstructL(aCommsChannel);

	CleanupStack::Pop();

	return c;

	}

CScriptIO::CScriptIO(CScriptExecutor* aScriptExecutor)

	: iScriptExecutor(aScriptExecutor)

/**

Constructor for CSetCommand, used in the first phase of construction.

@param aScriptExecutor a pointer to script executor.

@param aCommPort a reference to COMM port.

*/

	{}

void CScriptIO::ConstructL(const TDesC& aCommsChannel)

/**

Instantiates member variables.

*/

	{

	CommConstructL(KCommReadPriority,KCommWritePriority);

	iChat=CCommChatter::NewL(this,KChatterPriority,KChatBufferSize);

	iPreSendPause=CPreSendPause::NewL(this);

	iExcessData.Set(NULL,0);

	iCommsChannel.CreateL(aCommsChannel);

	iCommsChannel.Copy(aCommsChannel);

	}

void CScriptIO::CreateChannel(TRequestStatus& aStatus)

	{

	ASSERT(iCreateAndShutdownStatus == NULL);

	iCommClosed = EFalse;

	TInt err = CommOpen(iCommsChannel);

	if (err != KErrNone)

		{

		TRequestStatus* stat = &aStatus;

		User::RequestComplete(stat, err);	

		}

	iCreateAndShutdownStatus = &aStatus;

	}

void CScriptIO::CancelCreateChannel()

	{

	CommCancel();

	}

void CScriptIO::InitializeComplete()

	{

	ASSERT(iCreateAndShutdownStatus);

	User::RequestComplete(iCreateAndShutdownStatus, KErrNone);

	iCreateAndShutdownStatus = NULL;

	}

void CScriptIO::ShutdownComplete(TInt aError)

	{

	ASSERT(iCreateAndShutdownStatus);

	if (iCreateError != KErrNone) //The creation error is probably more interesting than a bad shutdown error

		{

		aError = iCreateError;

		}

	User::RequestComplete(iCreateAndShutdownStatus, aError);

	iCreateAndShutdownStatus = NULL;

	iCreateError = KErrNone;

	iCommClosed = ETrue;

	}

void CScriptIO::ConfigurePort(TRequestStatus& aStatus, const TCommConfig& aConfiguration)

/**

Configures COMM port.

@return error value from RComm::SetConfig() request.

*/

	{

	using namespace BasebandChannelAdaptation;

	iConfig() = aConfiguration;

	iBca->Ioctl(aStatus, KBcaOptLevelExtSerial, KSerialSetConfig, iConfig);

	}

void CScriptIO::CancelConfigurePort()

/**

Cancel Configuration of COMM port.

*/

	{

	iBca->CancelIoctl();

	}

void CScriptIO::ShutdownChannel(TRequestStatus& aStatus)

	{

	ASSERT(iCreateAndShutdownStatus == NULL);

	iCreateAndShutdownStatus = &aStatus;

	Stop(KErrNone);

	}

void CScriptIO::Stop(TInt  aError)

/**

Upcall from CScriptBcaControl class indicating an error was encountered.  Clean up and close BCA.

@param aError System wide error code. 

*/

	{

	iCreateError = aError;

	delete iChat;

	iChat = NULL;

	delete iPreSendPause;

	iPreSendPause = NULL;

	CommClose();

	}

CScriptIO::~CScriptIO()

/**

Destructor.

Deletes iChat.

Deletes iPreSendPause.

Calls CommDelete().

*/

	{

	iCommsChannel.Close();

	delete iChat;

	delete iPreSendPause;

	CommDelete();

	}

void CScriptIO::Start()

/**

Starts write.

*/

	{

	CommWriteReady();

	iWritePending=ETrue;

	iChat->StartTimer(KWriteTimeOutSec*KOneSecInMicroSecs);

	}

void CScriptIO::CommReadComplete(TInt aStatus)

/**

Reads completely - stops timer and if no error checks string against the desired string

*/

	{

	if(aStatus==KErrCommsLineFail)

		{

		iChat->StopTimer();

		iReadPending=EFalse;

		TRAPD(ret,iScriptExecutor->CompletedReadL(KErrCommsLineFail));

		if (KErrNone != ret)

			{

			}

		return;

		}

	__ASSERT_ALWAYS(iReadPending,NetDialPanic(EIllegalReadComplete));

	iReadPending=EFalse;

	if (aStatus==KErrCommsFrame)

		{

		User::After(KClockTick);		// wait for a clock tick and continue

		aStatus=KErrNone;

		}

	else if (aStatus!=KErrNone)

		{

		TRAPD(ret,iScriptExecutor->CompletedReadL(aStatus));

		if (KErrNone != ret)

			{

			}

		return;

		}

	if (iScriptExecutor->RequestUsePct())

		{

		TInt err=iScriptExecutor->WritePct(iRxBuffer);

		if (err!=KErrNone)

			{

			TRAPD(ret,iScriptExecutor->CompletedReadL(err));

			if (KErrNone != ret)

				{

				}

			return;

			}

		}

	if (!iScriptExecutor->ReadPctPending())

		{

		for (iRxBufOffset=0; iRxBufOffset<iRxBuffer.Length(); iRxBufOffset++)

			{

			iChat->AddChar(iRxBuffer[iRxBufOffset]);

			if(iStringFound!=-1)

				{

				iExcessData.Set(iRxBuffer.Right(iRxBuffer.Length()-iRxBufOffset-1));

				break;

				}

			}

		}

	else

		iStringFound=KErrNotFound;

	if(iStringFound!=KErrNotFound)

		{

		iChat->StopTimer();

		TRAPD(ret,iScriptExecutor->CompletedReadL(aStatus,iStringFound));

		if (KErrNone != ret)

			{

			}

		}

	else

		{

		iReadPending=ETrue;

		CommReadOneOrMore(iRxBuffer);

		}

	}

void CScriptIO::CommWriteComplete(TInt aStatus)

/**

Writes completely - stops timer

*/

	{

	iChat->StopTimer();

	if(aStatus==KErrCommsLineFail)

 		{

 		iWritePending=EFalse;

 		iScriptExecutor->CompletedWrite(KErrCommsLineFail);

 		return;

 		}

	__ASSERT_ALWAYS(iWritePending,NetDialPanic(EIllegalWriteComplete));

	iWritePending=EFalse;

	if(aStatus==KErrCommsFrame)		// ignore Comms Frame Error

		aStatus=KErrNone;

	iScriptExecutor->CompletedWrite(aStatus);

	}

void CScriptIO::ChatStringMatch(TInt aIndex)

/**

Logs matching string found and sets iStringFound to aIndex.

*/

	{

	iStringFound=aIndex;

	}

void CScriptIO::ChatTimeout()

/**

Timeout has occurred without while read/write pending.  Calls executor with error.

*/

	{

	CommCancel();

	if(iWritePending)

		{

		iWritePending=EFalse;

		iScriptExecutor->CompletedWrite(KErrTimedOut);

		}

	else if(iReadPending)

		{

		iReadPending=EFalse;

		TRAPD(ret,iScriptExecutor->CompletedReadL(KErrTimedOut));

		if (KErrNone != ret)

			{

			}

		}

	else

		NetDialPanic(EIllegalTimeOutComplete);

	}

void CScriptIO::Read(CLabelSearchArray* aSearchArray, const TReal& aTimeOut)

/**

Read from port.

*/

	{

	__ASSERT_ALWAYS(aSearchArray!=NULL, NetDialPanic(ENullSearchArray));

	iExcessData.Set(NULL,0);	// clear excess data buffer

	for(TInt i=0; i<aSearchArray->Count(); i++)

		{

		iChat->AddString((*aSearchArray)[i]->ChatString());

		}

	iReadPending=ETrue;

	iStringFound=KErrNotFound;

//	

	TReal realTimeInterval=aTimeOut*KTRealOneSecInMicroSecs;

	TInt timeInterval=TInt(realTimeInterval);

	if (realTimeInterval>TReal(timeInterval))

		timeInterval++;

//

	iChat->StartTimer(timeInterval);

	CommReadOneOrMore(iRxBuffer);

	iRxBufOffset=0;

	}

void CScriptIO::ReadEcho()

/**

Reads echo.

*/

	{

	iExcessData.Set(NULL,0);	// clear excess data buffer

	iReadPending=ETrue;

	iChat->StartTimer(KMaxTInt);

	CommReadOneOrMore(iRxBuffer);

	iRxBufOffset=0;

	}

void CScriptIO::Write(const TDesC8& aString)

/**

Writes to port - start pre-send pause, when it completes, will start write.

*/

	{

	if (aString.Length()>KTxBufferSize)

		iTxBuffer.Copy(aString.Left(KTxBufferSize));

	else

		iTxBuffer.Copy(aString);

	__ASSERT_ALWAYS(!iWritePending, NetDialPanic(EIllegalWritePending));

	iWritePending=ETrue;

	iPreSendPause->Start();

	}

void CScriptIO::PreSendPauseCompleted()

/**

PreSend pause is finished, can now do write.

*/

	{

	CommWrite(iTxBuffer);

	iChat->StartTimer(KWriteTimeOutSec*KOneSecInMicroSecs);

	}

TBool CScriptIO::RWPending()

/**

Returns true if a read or write is pending.

*/

	{

	return (iWritePending)||(iReadPending);

	}

TInt CScriptIO::GetExcessData(TDes8& aBuffer)

/**

Gets excess data.

*/

	{

	TInt len=aBuffer.Length();

	if(iExcessData.Length()>len)

		aBuffer.Copy(iExcessData.Right(len));

	else

		aBuffer.Copy(iExcessData);

	return KErrNone;

	}

void CScriptIO::Disconnect()

/**

Disconnection - resets handshaking and closes comm port.

*/

	{

	Cancel();

/*	TCommConfig cbuf;

	TCommConfigV01 &cfg=cbuf();

	iCommPort.Config(cbuf);

	cfg.iHandshake = KConfigFreeRTS	| KConfigFreeDTR;

	iCommPort.SetConfig(cbuf);		// ignore return value

	iCommPort.SetSignalsToSpace(KSignalRTS | KSignalDTR);

*/

	// Don't issue a CommClose() if we have already issued it before.

	if (!iCommClosed)

		{

		CommClose();

		}

	}

void CScriptIO::ReConfigureAndCancelPort(TRequestStatus& aStatus)

/**

Cancels and reconfigures Comm Port to allow RTS and DTR to be subsequently dropped (see also DropSignals()).

@param aStatus TRequestStatus to complete once Comm Port is configured.

*/

	{

	using namespace BasebandChannelAdaptation;

	Cancel();

	// Someone has (presumably accidentally) defined Ioctls KSerialConfig and KSerialSetConfig as

	// requiring a package buffer within a package buffer, hence the use of "()()".

	iConfig()().iHandshake = KConfigFreeRTS | KConfigFreeDTR;

	iBca->Ioctl(aStatus, KBcaOptLevelExtSerial, KSerialSetConfig, iConfig);

	}

void CScriptIO::DropSignals(TRequestStatus& aStatus)

/**

Drop RTS and DTR.  Occurs once ReConfigureAndCancelPort() has released the signals.

@param aStatus TRequestStatus to complete once signals have been dropped.

*/

	{

	SetControlLines(&aStatus, 0, KSignalRTS | KSignalDTR);

	}

void CScriptIO::Cancel()

/**

Cancel - cancels timers and read/write

*/

	{

	CommCancel();

	if (iPreSendPause)

		{

		iPreSendPause->Cancel();

		}

	iReadPending=EFalse;

	iWritePending=EFalse;

	iExcessData.Set(NULL,0);

	if (iChat)

		{

		iChat->StopTimer();

		iChat->DeleteAllAndStop();

		}

	}

void CScriptIO::ReadEchoCancel()

/**

Cancel read - cancels timers and read

*/

	{

	CommReadCancel();

	iReadPending=EFalse;

	iExcessData.Set(NULL,0);

	iChat->StopTimer();

	}

void CScriptIO::DropDTR(TRequestStatus* aStatusPtr)

/**

Drop DTR.

*/

	{

	Cancel();

	SetControlLines(aStatusPtr, 0, KSignalDTR);

	}