diff -r 5cc91383ab1e -r 7333d7932ef7 installationservices/swinstallationfw/source/siftransportsession.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/installationservices/swinstallationfw/source/siftransportsession.cpp	Tue Aug 31 15:21:33 2010 +0300
@@ -0,0 +1,129 @@
+/*
+* 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;
+	}