// Copyright (c) 2004-2009 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:

// Implementation of RSBEClientSession class.

// 

//

/**

 @file

*/

#include "sbeclientsession.h"

#include "sbeclientserver.h"

#include <connect/sbtypes.h>

#include <connect/panic.h>

namespace conn

	{

	RSBEClientSession* RSBEClientSession::NewL()

	/** Symbian OS constructor 

	@return pointer to an instantiated RSBEClientSession object */

		{

		RSBEClientSession* self = new (ELeave) RSBEClientSession();

		CleanupStack::PushL(self);

		self->ConstructL();

		CleanupStack::Pop(self);

		return self;

		}

	void RSBEClientSession::ConstructL()

	/** Symbian second phase constructor */

		{

        iGSHInterface = CHeapWrapper::NewL();

		}

	RSBEClientSession::RSBEClientSession() : iCallbackHandler(NULL)

	/** Class constructor. */

		{

		}

	RSBEClientSession::~RSBEClientSession()

	/** Class destructor. */

		{

		delete iGSHInterface;

		delete iCallbackHandler;

		}

	void RSBEClientSession::Close()

	/** Closes the Secure Backup Engine handle. */

		{

		iGlobalSharedHeap.Close();

		RSessionBase::Close();

		}

	TInt RSBEClientSession::Connect()

	/** Connects the handle to the Secure Backup Engine.

	@return KErrNone if successful, KErrCouldNotConnect otherwise

	*/

		{

        TInt nRetry = KSBERetryCount;

		TInt nRet = KErrNotFound;

		while(nRetry > 0 && nRet != KErrNone)

			{

		    const TSecurityPolicy policy(static_cast<TSecureId>(KSBServerUID3));

			nRet = CreateSession(KSBEServerName, Version(), KSBEASyncMessageSlots, EIpcSession_Unsharable,&policy);

			if(nRet == KErrNotFound || nRet == KErrServerTerminated)

				{

				StartServer();

				}

			nRetry--;

			}

		// If we were succesful, then get a handle to the server created and owned GSH

		if (nRet == KErrNone)

			{

			nRet = GetGlobalSharedHeapHandle();

			}

		return nRet;

		}

	TVersion RSBEClientSession::Version() const

	/** Returns the version of this API

	@return The version of this API

	*/

		{

	    return TVersion (KSBEMajorVersionNumber,

							KSBEMinorVersionNumber,

							KSBEBuildVersionNumber);

	  	}

	//

	// Server startup code

	TInt RSBEClientSession::StartServer()

	/** Start the server as a thread on WINS or a process on ARM.

	Called by Connect when the kernel is unable to create a session

	with the SBE server (as its not running).

	@return Standard Symbian OS code from RProcess/RThread create.

	*/

		{

        //

		// Servers UID

		const TUidType serverUid(KNullUid, KNullUid, KSBServerUID3);

		RProcess server;

    	TInt nRet=server.Create(KSBImageName,KNullDesC,serverUid);

    	if (nRet != KErrNone)

    	    {

    		return nRet;

    		}

    	TRequestStatus stat;

    	server.Rendezvous(stat);

    	if (stat != KRequestPending)

    		{

    		server.Kill(0);

    		}

    	else

    		{

    		server.Resume();

    		}

    	User::WaitForRequest(stat);

    	return (server.ExitType() == EExitPanic) ? KErrGeneral : stat.Int();

		}

	void RSBEClientSession::ListOfDataOwnersL(RPointerArray<CDataOwnerInfo>& aDataOwners)

	/**

	Return the list of private data owners on the device that have backup registration files.

	If a leave does occur, then aDataOwners

	@param aDataOwners Pointer array holding the list of Data owners requiring backup functionality.

			Any items present in this array will be lost

	*/

		{

		// Get the server to construct the flattened array and return the size of it		

		TInt result = SendReceive(ESBEMsgPrepDataOwnerInfo);

		User::LeaveIfError(result);

		iDataOwnersArray = &aDataOwners;

		PopulateListOfDataOwnersL(result);

		}

	void RSBEClientSession::PublicFileListL(TDriveNumber aDrive, CSBGenericDataType& aGenericDataType, 

												RFileArray& aFiles)

	/**

	Get the list of public files to backup for a particular Data Owner on a particular drive

	@param aDrive The drive that the public files exist on

	@param aGenericDataType Reference to the generic data type that is being passed to the SBEngine.

	@param aFiles An empty array of file information that will be filled with details of the public files

	@leave If a synchronous IPC call to the SBEngine returns an error code (i.e. if SBEngine leaves)

	*/

		{

		// request the public file list

		TInt result = SendReceive(ESBEMsgPrepPublicFiles, TIpcArgs(aDrive, 

						&(aGenericDataType.Externalise())));

		User::LeaveIfError(result);

		iFileArray = &aFiles;

		PopulatePublicFileListL(result);

		}

	void RSBEClientSession::RawPublicFileListL(	TDriveNumber aDrive, 

												CSBGenericDataType& aGenericDataType, 

												RRestoreFileFilterArray& aFileFilter)

	/**

	Get the list of public files to backup for a particular Data Owner on a particular drive for 

	a partial restore

	@param aDrive The drive that the public files exist on

	@param aGenericDataType Reference to the generic data type that is passed to the SBEngine.

	@param aFileFilter Empty array that will be filled with the files/directories to be backed up 

	on return

	@leave If a synchronous IPC call to the SBEngine returns an error code (i.e. if SBEngine leaves)

	*/

		{

        // ensure that the array is cleared out before populating with externalised data

		aFileFilter.Reset();

		TPckgC<TDriveNumber> drive(aDrive);

		// request the public file list

		TInt result = SendReceive(ESBEMsgPrepPublicFilesRaw, TIpcArgs(&drive, 

				&(aGenericDataType.Externalise())));

		User::LeaveIfError(result);

		// Create a descriptor big enough for the array to be externalised into

		HBufC8* pFileArray = HBufC8::NewL(result);

		CleanupStack::PushL(pFileArray);

		TPtr8 fileArray(pFileArray->Des());

		User::LeaveIfError(SendReceive(ESBEMsgGetPublicFilesRaw, TIpcArgs(&fileArray)));

		RRestoreFileFilterArray* pFileFilter = RRestoreFileFilterArray::InternaliseL(fileArray);

		CleanupStack::PushL(pFileFilter);

		CleanupClosePushL(*pFileFilter);

		TInt count = pFileFilter->Count();

		for (TInt x = 0; x < count; x++)

			{

				aFileFilter.AppendL((*pFileFilter)[x]);

			} // for x

		CleanupStack::PopAndDestroy(pFileFilter); // CleanupClosePushL(*pFileFilter)

		CleanupStack::PopAndDestroy(pFileFilter); // CleanupStack::PushL(pFileFilter)

		CleanupStack::PopAndDestroy(pFileArray);

		}

	void RSBEClientSession::PublicFileListXMLL(TDriveNumber aDrive, TSecureId aSID, HBufC*& aFileList)

	/**

	Get the list of public files in XML format

	@param aDrive The drive to get the list for

	@param aSID The SID of the data owner to get the public files for

	@param aFileList The descriptor to populate on return should be NULL

	@leave If a synchronous IPC call to the SBEngine returns an error code (i.e. if SBEngine leaves)

	*/

		{

        TPckgC<TDriveNumber> drive(aDrive);

		TPckgC<TSecureId> sid(aSID);

		// request the public file list

		TInt result = SendReceive(ESBEMsgPrepPublicFilesXML, TIpcArgs(&drive, &sid));

		User::LeaveIfError(result);

		// Create a descriptor big enough for the array to be externalised into

		aFileList = HBufC::NewL(result);

		TPtr fileList(aFileList->Des());

		User::LeaveIfError(SendReceive(ESBEMsgPrepPublicFilesXML, TIpcArgs(&fileList)));

		}

	void RSBEClientSession::SetBURModeL(const TDriveList& aDriveList, TBURPartType aBURType, 

						  TBackupIncType aBackupIncType)

	/**

	Set the Backup and Restore mode on/off and configure the BUR options

	@param aDriveList Array of drives that are to be backed up during the operations

	@param aBURType Set the device into Full/Partial BUR or normal operation

	@param aBackupIncType Base/Incremental backup

	@leave If a synchronous IPC call to the SBEngine returns an error code (i.e. if SBEngine leaves)

	*/

		{

		User::LeaveIfError(SendReceive(ESBEMsgSetBURMode, TIpcArgs(&aDriveList, aBURType, aBackupIncType)));

		}

	void RSBEClientSession::SetSIDListForPartialBURL(RSIDArray& aSIDs)

	/**

	If a partial backup is required then this sets the list of data owners.

	This method must only be called when the device has just been put into backup or restore mode.

	It must only be called once for a backup or restore operation.

	@param aSIDs array of affected data owners.

	@leave If a synchronous IPC call to the SBEngine returns an error code (i.e. if SBEngine leaves)

	*/

		{

        HBufC8* pFlattenedArray = aSIDs.ExternaliseL();

		CleanupStack::PushL(pFlattenedArray);

		TPtrC8 flatArray(pFlattenedArray->Des());

		User::LeaveIfError(SendReceive(ESBEMsgSetSIDListPartial, TIpcArgs(&flatArray)));

		CleanupStack::PopAndDestroy(pFlattenedArray);

		}

	void RSBEClientSession::SIDStatusL(RSIDStatusArray& aSIDStatus)

	/**

	Gets the status of a set of data owners.

	This method must only be called in backup or restore mode.

	@param aSIDStatus an array of structures for information about data owners. On return

	the status information is filled in.

	@leave If a synchronous IPC call to the SBEngine returns an error code (i.e. if SBEngine leaves)

	*/

		{

        HBufC8* pExternalisedArray = aSIDStatus.ExternaliseL();

		CleanupStack::PushL(pExternalisedArray);

		TPtr8 externArray(pExternalisedArray->Des());

		User::LeaveIfError(SendReceive(ESBEMsgPrepSIDStatus, TIpcArgs(&externArray)));

		// Reset the descriptor, ready for getting the returned externalised array

		externArray.Zero();

		User::LeaveIfError(SendReceive(ESBEMsgGetSIDStatus, TIpcArgs(&externArray)));

		RSIDStatusArray* pInternalisedArray = RSIDStatusArray::InternaliseL(externArray);

		CleanupStack::PopAndDestroy(pExternalisedArray); // pExternalisedArray

		CleanupStack::PushL(pInternalisedArray);

		CleanupClosePushL(*pInternalisedArray);

		aSIDStatus.Reset();

		// Copy the returned array into the passed array

		TInt count = pInternalisedArray->Count();

		for (TInt index = 0; index < count; index++)

			{

			aSIDStatus.AppendL((*pInternalisedArray)[index]);

			}

		CleanupStack::PopAndDestroy(pInternalisedArray);	// pInternalisedArray->Close()

		CleanupStack::PopAndDestroy(pInternalisedArray); // pInternalisedArray

		}

	TPtr8& RSBEClientSession::TransferDataAddressL()

	/**

	Provides access to the base of the global chunk used to transfer data between

	the Secure Backup Engine and a Secure Backup Server.  This method should be used

	when the Secure Backup Server is providing data to the Secure Backup Engine (either as part 

	of a restore operation or when supplying snapshots during a backup operation.

	The Secure Backup Engine only uses one global chunk at a time. It is not permissible to

	try to carry out multiple backup or restore operations in parallel.  Normally a chunk

	of global heap would be protected by a mutex.  In this case, all the methods of the 

	CSecureBackupEngine must be regarded as synchronous and mutually exclusive - it is not

	permissible to make parallel calls.

	The global chunk used during a backup or restore operation may change and so the address must

	be requested whenever required rather than being cached.

	@return Pointer to the start of the buffer for writing

	*/

		{

        return iGSHInterface->WriteBufferL(iGlobalSharedHeap);

		}

	TPtrC8& RSBEClientSession::TransferDataInfoL(CSBGenericTransferType*& aGenericTransferType,

												 TBool& aFinished)

	/**

	Provides access to the data received from the Secure Backup Engine during a backup operation.

	This method should be called after a synchronous or asynchronous request for data has

	completed.

	@param aGenericTransferType Pointer reference that a Generic Transfer Type is allocated to

	@param aFinished Flag that will be set to ETrue if the data on the GSH is the last in the series

	@return Pointer to the start of the buffer for reading

	*/

		{

        TPtrC8& returnedBuf = iGSHInterface->ReadBufferL(iGlobalSharedHeap);

		TDesC8& genTypeBuffer = iGSHInterface->Header(iGlobalSharedHeap).GenericTransferTypeBuffer();

		if (genTypeBuffer.Size() == 0)

			{

			User::Leave(KErrNotReady);

			}

		// Create a new client-side transfer type and pass ownership

		aGenericTransferType = CSBGenericTransferType::NewL(genTypeBuffer);

		CleanupStack::PushL(aGenericTransferType);

		aFinished = iGSHInterface->Header(iGlobalSharedHeap).iFinished;

		CleanupStack::Pop(aGenericTransferType);

		return returnedBuf;

		}

	TInt RSBEClientSession::GetGlobalSharedHeapHandle()

	/**

	Requests the handle for the Global Anonymous Shared Heap from the server that owns it and

	sets the member RChunk with it.

	@return An error code resulting from the server request for the handle, KErrNone if ok

	*/

		{

        TInt ret = SendReceive(ESBEMsgGetGSHHandle);

		// ret is negative if an error has ocurred

		if (ret > KErrNone)

			{

			ret = iGlobalSharedHeap.SetReturnedHandle(ret);

			// Since a handle was returned, there were no errors

			ret = KErrNone;

			}

		return ret;

		}

	void RSBEClientSession::RequestDataL(CSBGenericTransferType& aGenericTransferType, 

		TRequestStatus& aStatus)

	/**

	Asynchronous request of the Secure Backup Engine to supply data for a particular data owner.

	When the supplied TRequestStatus has been completed by the server, TransferDataInfoL should

	be called to retrieve the requested data.

	@param aGenericTransferType Reference to the identifier of the data requested

	@param aStatus TRequestStatus object used by the server to signal the client that a response 

	is ready

	*/

		{

        const TDesC8& transBuf = aGenericTransferType.Externalise();

		SendReceive(ESBEMsgRequestDataAsync, TIpcArgs(&transBuf), aStatus);

		}

	void RSBEClientSession::RequestDataL(CSBGenericTransferType& aGenericTransferType)

	/**

	Synchronous request of the Secure Backup Engine to supply data for a particular data owner.

	When the supplied TRequestStatus has been completed by the server, TransferDataInfoL should

	be called to retrieve the requested data.

	@param aGenericTransferType Reference to the identifier of the data requested

	@leave If a synchronous IPC call to the SBEngine returns an error code (i.e. if SBEngine leaves)

	*/

		{

        User::LeaveIfError(SendReceive(ESBEMsgRequestDataSync, 

			TIpcArgs(&(aGenericTransferType.Externalise()))));

		}

	void RSBEClientSession::SupplyDataL(CSBGenericTransferType& aGenericTransferType, 

		TBool aFinished, TRequestStatus& aStatus)

	/**

	Synchronous method for signalling to the server that the client has placed an amount 

	of data in the Global Shared Heap and

	@param aGenericTransferType Information about the data that has been transferred

	@param aFinished ETrue indicates that additional SupplyDataL calls will be made as 

	part of this transfer operation

	@leave If a synchronous IPC call to the SBEngine returns an error code (i.e. if SBEngine leaves)

	*/

		{

        iGSHInterface->Header(iGlobalSharedHeap).GenericTransferTypeBuffer() 

			= aGenericTransferType.Externalise();

		SendReceive(ESBEMsgSupplyDataSync, TIpcArgs(aFinished), aStatus);

		}

	void RSBEClientSession::SupplyDataL(CSBGenericTransferType& aGenericTransferType, 

		TBool aFinished)

	/**

	Synchronous method for signalling to the server that the client has placed an amount 

	of data in the Global Shared Heap and

	@param aGenericTransferType Information about the data that has been transferred

	@param aFinished ETrue indicates that additional SupplyDataL calls will be made as 

	part of this transfer operation

	@leave If a synchronous IPC call to the SBEngine returns an error code (i.e. if SBEngine leaves)

	*/

		{

        iGSHInterface->Header(iGlobalSharedHeap).GenericTransferTypeBuffer() 

			= aGenericTransferType.Externalise();

		User::LeaveIfError(SendReceive(ESBEMsgSupplyDataSync, TIpcArgs(aFinished)));

		}

	void RSBEClientSession::AllSnapshotsSuppliedL()

	/**

	This methods informs the data owner that all snapshots have been supplied.

	@leave If a synchronous IPC call to the SBEngine returns an error code (i.e. if SBEngine leaves)

	*/

		{

        User::LeaveIfError(SendReceive(ESBEMsgAllSnapshotsSupplied));

		}

	TUint RSBEClientSession::ExpectedDataSizeL(CSBGenericTransferType& aGenericTransferType)

	/**

	Get the expected total size of the data to be returned by the SBE for the purposes 

	of calculating progress information

	@param aGenericTransferType Reference to the identifier of the data to be retrieved

	@leave If a synchronous IPC call to the SBEngine returns an error code (i.e. if SBEngine leaves)

	*/

		{

        TPckgBuf<TUint> sizePkg;

		TPtrC8 genType(aGenericTransferType.Externalise());

		User::LeaveIfError(SendReceive(ESBEMsgGetExpectedDataSize, TIpcArgs(&genType, &sizePkg)));

		return sizePkg();

		}

	void RSBEClientSession::AllSystemFilesRestored()

	/**

	Signal the Secure Backup Engine that registration files are to be parsed and Active data owners 

	are to be started

	*/

		{

        SendReceive(ESBEMsgAllSystemFilesRestored);

		}

	/**

	Return the list of private data owners on the device that have backup registration files.

	If a leave does occur, then aDataOwners

	@param aDataOwners Pointer array holding the list of Data owners requiring backup functionality.

			Any items present in this array will be lost

	@param aStatus is TRequestStatus&

	*/

	void RSBEClientSession::ListOfDataOwnersL(RPointerArray<CDataOwnerInfo>& aDataOwners, TRequestStatus& aStatus)

		{

		if (iCallbackHandler == NULL)

			{

			iCallbackHandler = CSBECallbackHandler::NewL(*this);				

			}

		if (iCallbackHandler->IsActive())

			{

			User::Leave(KErrInUse);