// 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:

// DHCPControl.h

// The DHCP Database access header file

// 

//

/**

 @file DHCPControl.h

*/

#ifndef DHCPDB_H

#define DHCPDB_H

#include <e32base.h>

#include <es_enum.h>

#include <comms-infras/metadata.h>

#include <metadatabase.h>

#include <commsdattypesv1_1.h>

//uncomment this line to store DHCP persistent data in a file named according to the client ID

//#define DHCP_PERSISTENTDATA_INFILE

class CDHCPStateMachine;

class TInetAddr;

#ifdef DHCP_PERSISTENTDATA_INFILE

class RFile;

class RFs;

#endif

class CDHCPDb : public CBase

/**

  * Base DHCP database access control class

  * 

  *

  * @internalTechnology

  *

  */

	{

public:

	CDHCPDb( TUint32 aIapId ) :

		iIapId( aIapId ),

		iIpDNSAddressFromServer(0,0),

		iNameServer1(0,0),

		iNameServer2(0,0)

		{

		}

	CDHCPDb( const TPtrC& aIpDNSAddressFromServer, const TPtrC& aNameServer1, const TPtrC& aNameServer2 ) :

		iIpDNSAddressFromServer( aIpDNSAddressFromServer ),

		iNameServer1( aNameServer1 ),

		iNameServer2( aNameServer2 )

		{

		}

	TBool ReadL( CDHCPStateMachine& aDhcpStateMachine, Meta::SMetaData& aPersistent );

   void WriteL( CDHCPStateMachine& aDhcpStateMachine, const Meta::SMetaData& aPersistent );

	// returns an array of address family enums e.g. KAfInet6, KAfInet

	void GetAddressFamiliesL(RArray<int> & results);

#ifdef SYMBIAN_NETWORKING_DHCPSERVER   	

	TBool CheckIfDHCPServerImplEnabledL();

#endif // SYMBIAN_NETWORKING_DHCPSERVER	

#ifdef SYMBIAN_DNS_PROXY   	

	void ReadHostNameL(CDHCPStateMachine& aDhcpStateMachine);

#endif //SYMBIAN_DNS_PROXY

public:

	TUint32 iIapId;

	TTime iLeaseExpiresAt;  //for IP4 it's the interface's IP address expiration time

                           //for IP6 it's the interface's IA expiration time

#ifdef SYMBIAN_NETWORKING_DHCPSERVER   

	// set to indicate that the DHCP server implementation is needed

	TBool iDHCPServerImpl;

#endif // SYMBIAN_NETWORKING_DHCPSERVER	

protected:

	void OpenIAPViewLC(CommsDat::CMDBSession*& aSession, CommsDat::CCDIAPRecord*& aIapRecord);

	static void VerifyFieldReadSuccessL(TInetAddr& addr, const TDesC& input, TInt field);

#ifdef DHCP_PERSISTENTDATA_INFILE

	void OpenFileLC( const TDesC8& aClientId, TAutoClose<RFs>& aFs, TAutoClose<RFile>& aFile, TBool aCreateNew );

	void WritePersistentL( const TDesC8& aClientId, const Meta::SMetaData& aPersistent );

	void ReadPersistentL( const TDesC8& aClientId, Meta::SMetaData& aPersistent );

#endif

private:

	void InitialServiceLinkL( CommsDat::CMDBSession* aDbSession, CommsDat::CCDIAPRecord* aIAPSetting );

protected:

   //names of the fields in CommDb

   TPtrC iIpDNSAddressFromServer;

   TPtrC iNameServer1;

   TPtrC iNameServer2;

	};

#endif