/*

* Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of the License "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 implements the SIF Transport Session

*

*/

#include "siftransportserver.h"

#include <scs/ipcstream.h>

#include <scs/nullstream.h>

#include <usif/sif/sif.h>

#include "siftransportcommon.h"

#include "usiflog.h"

using namespace Usif;

CSifTransportSession* CSifTransportSession::NewL(CSifTransportServer &aServer, TransportTaskFactory::GenerateTask aTaskFactory)

/**

	Factory function allocates new instance of CSifTransportSession.

	@return	New, initialized instance of CSifTransportSession

			which is owned by the caller.

 */

	{

	CSifTransportSession* self = new (ELeave) CSifTransportSession(aServer, aTaskFactory);

	CleanupStack::PushL(self);

	self->ConstructL();

	CleanupStack::Pop(self);

	return self;

	}

CSifTransportSession::CSifTransportSession(CSifTransportServer &aServer, TransportTaskFactory::GenerateTask aTaskFactory)

/**

	This private constructor prevents direct instantiation.

 */

	: CScsSession(aServer), iTaskFactory(aTaskFactory), iExclusiveOperation(ETrue)

	{

	DEBUG_PRINTF3(_L8("0x%x CSifSession(server %x)\n"), this, &aServer);

	}

CSifTransportSession::~CSifTransportSession()

/**

	The base class destructor destroys any remaining subsessions

	or outstanding requests.

 */

	{

	DEBUG_PRINTF2(_L8("0x%x ~CSifTransportSession)\n"), this);

	}

TBool CSifTransportSession::DoServiceL(TInt aFunction, const RMessage2& aMessage)

/**

	Implement CScsSession by handling the supplied message.

	Note the subsession creation command is automatically sent to

	DoCreateSubsessionL, and not this function.

	@param	aFunction	Function identifier without SCS code.

	@param	aMessage	Standard server-side handle to message.

 */

	{

	DEBUG_PRINTF3(_L8("0x%x CSifSession::DoServiceL function %d\n"), this, aFunction);

	// Check if aFunction falls into the expected range

	if (aFunction < EGetComponentInfoByFileName || aFunction > EDeactivate)

		{

		aMessage.Panic(KSifTransportServerRequestError, KErrNotSupported);

		return ETrue;

		}

	// Check if this is an Install or Uninstall request, if yes read the ExclusiveOperation flag from aMessage

	if (aFunction == EGetComponentInfoByFileName || aFunction == EGetComponentInfoByFileHandle)

		{

		// GetComponentInfo requests are always processed regardless of the state of the SIF server.

		iExclusiveOperation = EFalse;

		}

	else if (aFunction >= EInstallByFileName && aFunction <= EUninstallWithOpaqueData)

		{

		// Read the ExclusiveOperation flag from aMessage for a synchronous request

		if (aFunction == EInstallByFileHandleWithOpaqueDataPreamble)

			{

			iExclusiveOperation = aMessage.Int0() != EFalse;

			return ETrue;

			}

		// Read the ExclusiveOperation flag from aMessage for asynchronous requests

		if (aFunction == EInstallByFileName ||

			aFunction == EInstallByFileNameWithOpaqueData ||

			aFunction == EUninstall ||

			aFunction == EUninstallWithOpaqueData)

			{

			iExclusiveOperation = aMessage.Int1() != EFalse;

			}

		else if (aFunction == EInstallByFileHandle)

			{

			iExclusiveOperation = aMessage.Int2() != EFalse;

			}

		}

	else

		{

		// We set iExclusiveOperation to ETrue in the constructor. However, we have to

		// set it here again because the client may send more requests within the same

		// session.

		iExclusiveOperation = ETrue;

		}

	// If the  ExclusiveOperation flag is set to ETrue and there is another pending request we leave with KErrServerBusy

	if (iExclusiveOperation && iServer.iAsyncRequests.Count() > 0)

		{

		User::Leave(KErrServerBusy);

		}

	// Create new request and execute it

	CSifTransportRequest::CreateAndExecuteL(aFunction, this, iTaskFactory, aMessage);

	return EFalse;

	}