/*

* Copyright (c) 2009-2010 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: Packet probe hook

*

*/

#include "sap.h"

CProviderProbe::CProviderProbe(CProtocolProbe* aProtocol) : iProtocol(aProtocol)

	{

	__DECLARE_NAME(_S("CProviderProbe"));

	iQueueLimit = 8000;

	}

CProviderProbe::~CProviderProbe()

	{

	if (iProtocol)

		iProtocol->CancelSAP(this);

	}

void CProviderProbe::Start()

	{

	}

TInt CProviderProbe::GetOption(TUint /*aLevel*/, TUint /*aName*/, TDes8& /*aOption*/) const

	{

	return KErrNotSupported;

	}

TInt CProviderProbe::SetOption(TUint /*aLevel*/, TUint /*aName*/, const TDesC8& /*aOption*/)

	{

//	return KErrNotSupported;

	return KErrNone;

	}

void CProviderProbe::Ioctl(TUint /*level*/,TUint /*name*/,TDes8* /*anOption*/)

	{

	Panic(EProbePanic_NotSupported);

	}

void CProviderProbe::CancelIoctl(TUint /*aLevel*/,TUint /*aName*/)

	{

	Panic(EProbePanic_NotSupported);

	}

TUint CProviderProbe::Write(const TDesC8 &/*aDesc*/, TUint /*aOptions*/, TSockAddr* /*aAddr*/)

	{

	// For now, Write does nothing on probe socket

	return 1;

	}

void CProviderProbe::Shutdown(TCloseType /*option*/,const TDesC8& /*aDisconnectionData*/)

	{

	Panic(EProbePanic_NotSupported);

	}

void CProviderProbe::Shutdown(TCloseType aOption)

	{

	switch(aOption)

		{

		case EStopInput:

			iInputStopped = ETrue;

			iRecvQ.Free();

			iSocket->Error(KErrNone,MSocketNotify::EErrorClose); // Complete KErrNone

			break;

		case EStopOutput:

			iSocket->Error(KErrNone,MSocketNotify::EErrorClose); // Complete KErrNone

			break;

		default:

	        if (aOption != EImmediate)

				iSocket->CanClose();

		}

	}

TInt CProviderProbe::SetLocalName(TSockAddr &/*aAddr*/)

	{

	return 0;	// Ignore silently

	}

void CProviderProbe::AutoBind()

	{

	// Ignore silently

	}

// CProviderProbe::Error

// *********************

// Soft errors are not immediately reported to the socket server.

// A soft error is indicated by a zero aOperationMask.

//

// The socket error can be cleared by calling this routing with

// aError == KErrNone.

//

void CProviderProbe::Error(TInt aError, TUint aOperationMask)

	{

	if (aError <= KErrNone && !FatalState())

		{

		if (aError == KErrNone)

			iErrorMask = aOperationMask;

		else

			iErrorMask |= aOperationMask;

	    if (iSocket && aOperationMask)

			iSocket->Error(aError, aOperationMask);

		}

	}

//

// CProviderProbe::Process()

// *************************

// Process incoming data from the protocol object.

//

void CProviderProbe::Process(RMBufChain& aPacket, CProtocolBase * /*aSourceProtocol*/)

	{

	// iInputStopped is set at ShutDown() and no packets should be coming

	// from the protocol after that. However, without knowing the exact

	// details of the process model/threads, it could be possible that

	// a Process() call has been initiated by the protocol and interrupted

	// before the shutdown, thus there may be a need for this iInputStopped

	// flag, although I would prefer to do without... NEED TO VERIFY IF

	// iInputStopped is really needed!!! -- msa

	//

	if(!(iInputStopped ||

		(iErrorMask & (MSocketNotify::EErrorFatal|MSocketNotify::EErrorConnect|MSocketNotify::EErrorRecv))))

		{

		iQueueLimit -= RMBufPacketBase::PeekInfoInChain(aPacket)->iLength;

		iRecvQ.Append(aPacket);

		iSocket->NewData(1);

		}

	else

		aPacket.Free();

	}

// CProviderProbe::IsReceiving

// ***************************

//

TBool CProviderProbe::IsReceiving(const RMBufPktInfo & /*aInfo*/)

	{

	if (iQueueLimit < 0)

		{

		// Receive Queue limit is full, cannot receive this packet

		iPacketsDropped++;

		return FALSE;

		}

	return TRUE;

	}

// CProviderProbe::GetData

// ***********************

void CProviderProbe::GetData(TDes8 &aDesc, TUint aOptions, TSockAddr *anAddr)

	{

	RMBufPacketBase packet;

	if (!iRecvQ.Remove(packet))

		Panic(EProbePanic_NoData);

	const RMBufPktInfo *const info = packet.Unpack();

	packet.CopyOut(aDesc, 0);

	if (anAddr!=NULL)

		*anAddr = info->iSrcAddr;

	if (aOptions & KSockReadPeek)

		{

		packet.Pack();

		iRecvQ.Prepend(packet);

		iSocket->NewData(1);

		}

	else

		{

		iQueueLimit += info->iLength; // Allow more packets in..

		packet.Free();

		}

	}

#ifdef TCPIP6_CAPABILITY

TInt CProviderProbe::SecurityCheck(MProvdSecurityChecker *aChecker)

	{

	_LIT_SECURITY_POLICY_C1(KPolicyNetworkControl, ECapabilityNetworkControl);

	return aChecker->CheckPolicy(KPolicyNetworkControl, "PROBE HOOK SAP");

	}

#endif