// Copyright (c) 2004-2009 Nokia Corporation and/or its subsidiary(-ies).+
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// All rights reserved.+
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// This component and the accompanying materials are made available+
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// under the terms of "Eclipse Public License v1.0"+
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// which accompanies this distribution, and is available+
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// at the URL "http://www.eclipse.org/legal/epl-v10.html".+
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//+
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// Initial Contributors:+
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// Nokia Corporation - initial contribution.+
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//+
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// Contributors:+
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//+
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// Description:+
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// Implementation of CSBEServer class.+
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// +
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//+
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+
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/**+
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 @file+
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*/+
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+
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#include <e32std.h>+
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#include <e32base.h>+
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#include "sbeclientserver.h"+
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#include "sbeserver.h"+
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#include "sbesession.h"+
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#include <connect/panic.h>+
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#include "sbedataownermanager.h"+
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#include "sblog.h"+
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//#include <stdlib.h>+
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+
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namespace conn+
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	{+
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+
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+
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	/** Secure Backup Engine security request ranges+
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	+
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	This is a breakdown of the SBE requests into ranges+
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	for security checking purposes.+
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+
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	@internalComponent+
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	*/+
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	const TInt mySBERanges[] = {0,23};+
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+
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	/** Secure Backup Engine range count+
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+
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	The number of different security ranges for SBEs request numbers+
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+
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	@internalComponent+
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	*/+
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	const TUint mySBERangeCount = sizeof(mySBERanges)/sizeof(mySBERanges[0]);+
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+
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	/** Secure Backup Engine security action array+
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+
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	An array with a one-to-one mapping with the range array+
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	specifiying what security action to take for each server request.+
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+
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	@internalComponent+
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	*/+
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	const TUint8 mySBEElementsIndex[mySBERangeCount] =+
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		{+
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		0,+
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		CPolicyServer::ENotSupported,+
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		};+
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+
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	/**+
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	@internalComponent+
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	*/+
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	const CPolicyServer::TPolicyElement mySBEElements[] =+
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		{+
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			{_INIT_SECURITY_POLICY_C2(ECapabilityWriteDeviceData,ECapabilityReadDeviceData)+
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				, CPolicyServer::EFailClient},+
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		};+
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+
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	/**+
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	@internalComponent+
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	*/+
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	const CPolicyServer::TPolicy mySBEPolicy =+
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		{+
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		0,+
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		mySBERangeCount,+
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		mySBERanges,+
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		mySBEElementsIndex,+
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		mySBEElements,+
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		};+
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+
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	CSBEServer::CSBEServer(CDataOwnerManager* aDOM)+
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		: CPolicyServer(EPriorityNormal,mySBEPolicy), iDOM(aDOM)+
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    /** +
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    Class constructor+
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    */+
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		{+
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		__ASSERT_DEBUG(aDOM, Panic(KErrArgument));+
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		}+
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+
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	CSBEServer::~CSBEServer()+
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    /**+
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    Class destructor+
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    */+
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		{+
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		iGlobalSharedHeap.Close();+
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		delete iGSHInterface;+
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		}+
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		+
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	CSBEServer* CSBEServer::NewLC(CDataOwnerManager* aDOM)+
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	/**+
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	Constructs a new instance of the CSBEServer, calls ConstructL, +
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	and returns it to the caller leaving it on the cleanup stack.+
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+
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	@return The new instance of CSBEServer.+
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	*/+
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		{+
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		CSBEServer* pSelf = new (ELeave) CSBEServer(aDOM);+
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		CleanupStack::PushL(pSelf);+
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		pSelf->ConstructL();+
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		return pSelf;+
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		}+
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+
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	void CSBEServer::ConstructL()+
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	/**+
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	Construct this instance of CSBEServer.+
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	*/+
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		{+
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		AllocateGlobalSharedHeapL();+
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+
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		iGSHInterface = CHeapWrapper::NewL();+
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		+
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		// Initialise the locked flag to be unlock+
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		iGSHInterface->ResetHeap(iGlobalSharedHeap);+
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		//+
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		// Start the server and a timer to stop it if nothing happens.+
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		StartL(KSBEServerName);+
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		iShutdown.ConstructL();+
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		#ifndef _DEBUG+
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			iShutdown.Start();+
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		#endif+
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		}+
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		+
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	void CSBEServer::AllocateGlobalSharedHeapL()+
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	/**+
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	Attempts to allocate the GSH. If initial attempts fail, it tries to allocate with+
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	progressively smaller chunk sizes+
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	*/+
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		{	+
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		TInt attemptedSize;+
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		TInt retryCount;+
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		TInt redFactor;+
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		iDOM->Config().HeapValues(attemptedSize, retryCount, redFactor);+
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		+
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		TInt result = KErrNone;+
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		+
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		for (; retryCount > 0; retryCount--)+
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			{+
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			result = iGlobalSharedHeap.CreateGlobal(KNullDesC, attemptedSize, attemptedSize);+
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			+
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			if (result == KErrNone)+
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				{+
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				// We have succesfully allocated a GSH+
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				break;+
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				}+
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			else+
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				{+
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				// Reduce the size of the GSH by a scale factor+
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				attemptedSize = attemptedSize / redFactor;+
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				}+
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			}+
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			+
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		User::LeaveIfError(result);+
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		}+
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+
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	void CSBEServer::AddSession()+
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	/** Increments the server session count.+
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	+
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	The server will shutdown when its +
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	session count drops to zero.+
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	*/+
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		{+
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		++iSessionCount;+
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		iShutdown.Cancel();+
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		}+
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+
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	void CSBEServer::DropSession()+
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	/** Decrements the server session count.  +
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	+
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	The server will shutdown when its +
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	session count drops to zero.+
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	*/+
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		{		+
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		if(--iSessionCount == 0)+
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			{+
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			iShutdown.Start();+
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			}+
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		}+
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+
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+
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	CSession2* CSBEServer::NewSessionL(const TVersion& aVersion,+
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		const RMessage2& /*aMessage*/) const+
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	/** Constructs a new SBE server session.+
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	+
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	Querys the supplied version infomation from the client+
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	with that of this server, and leaves if they are incompatable.+
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+
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	@param aVersion The clients version information+
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	@param aMessage Is ignored+
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	@return A new instance of CSBESession+
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	@leave KErrNotSupported if the version passed in aVersion is not the same as this one+
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	*/+
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		{+
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		TVersion thisVersion(KSBEMajorVersionNumber, +
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								KSBEMinorVersionNumber,+
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								KSBEBuildVersionNumber);+
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		+
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	    if (!User::QueryVersionSupported(thisVersion, aVersion))+
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			{+
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			User::Leave(KErrNotSupported);+
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			}+
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+
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		return new (ELeave) CSBESession();+
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		}+
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+
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	TInt CSBEServer::RunError(TInt aError)+
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	/** Called when this active objects RunL leaves. +
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	+
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	May be due to a bad client or the server itself.  In either +
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	case, complete the last outstanding message with the error +
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	code and continue handling client requests.+
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+
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    @param aError  Standard Symbian OS error code+
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	@return The error code to be passed back to the active scheduler framework.+
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	*/+
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		{+
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		//+
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		// A Bad descriptor is a bad client - panic it.+
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		if(aError == KErrBadDescriptor)+
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			{+
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			PanicClient(KErrBadDescriptor);+
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			}+
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+
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		//+
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		// Complete the message and continue handling requests.+
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		Message().Complete(aError);+
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		ReStart();+
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		return KErrNone;+
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		}+
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+
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+
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	void CSBEServer::PanicClient(TInt aPanic) const+
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	/** Panic a client.+
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+
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	@param aPanic The panic code.+
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	*/+
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		{+
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		__DEBUGGER()+
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		_LIT(KPanicCategory,"SBE Server");+
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		RThread client;+
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		Message().Client(client);+
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		client.Panic(KPanicCategory, aPanic);+
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		}+
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+
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	} // end namespace+
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