/*

* 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:

* Name        : 6to4.h

* Part of     : 6to4 plugin / 6to4.prt

* Implements 6to4 automatic and configured tunnels, see

* RFC 3056 & RFC 2893

* Version     : 0.2

*

*/

/**

 @internalComponent

*/

#ifndef __6TO4_H

#define __6TO4_H

//  INCLUDES

#include <posthook.h>

#include <es_ini.h>

#include "6to4_tunnel.h"

// CONSTANTS

// Protocol Name

_LIT(K6to4, "6to4");

// File name

_LIT (K6To4IniData, "6to4.ini");

// Sections

_LIT (K6To4IniSectionTunnels, "tunnels");

_LIT (K6To4IniTunnelFile, "filename");

// MACROS

// DATA TYPES

// FUNCTION PROTOTYPES

// FORWARD DECLARATIONS

class CProtocolIPv4;

class CIpAddressDesc;

class C6to4FlowInfo;

class C6to4Listener;

class MEventService;

// CLASS DECLARATION

/**

*  CProtocol6to4

*  Plugin for 6to4 implementation.

*

*  @lib 

*  @since

*/

class CProtocol6to4 : public CProtocolPosthook

	{

	public:  // Constructors and destructor

	CProtocol6to4 ();

	/**

	 * Destructor.

	 */

	virtual ~CProtocol6to4 ();

	public: // New functions

	/**

	 * Compatibility checking for the notification service.

	 * @since 

	 * @param 

	 * @return void

	 */

	void CheckCompatibility ();

	/**

	 * Loads the configuration file and configures the system accordingly.

	 * @since 

	 * @param 

	 * @return TBool ETrue if success.

	 */

	TBool LoadConfigurationFile ();

	/**

	 * Loads the tunnel configuration file and configures the system 

	 * accordingly.

	 * @since 

	 * @param aFile Tunnel configuration file to be parsed. 

	 * @return TInt KErrNone if success.

	 */

	TInt LoadFileL (const TDesC & aFile);

	/**

	 * Private member access

	 * @since 

	 * @param 

	 * @return TUint32

	 */

	inline TUint32 InterfaceIndex () const        { return iInterfaceIndex; }

	public: // Functions from base classes

	/**

	 * From CProtocolBase  

	 * @since 

	 * @param aTag Name

	 * @return void

	 */

	virtual void InitL (TDesC & aTag);

	/**

	 * From CProtocolBase  

	 * @since 

	 * @param aDesc Descriptor to be filled by this method.

	 * @return void

	 */

	virtual void Identify (TServerProtocolDesc * aDesc) const;

	/**

	 * From CProtocolBase  

	 * @since 

	 * @param aDesc Descriptor to be filled by this method.

	 * @return void

	 */

	static void Identify (TServerProtocolDesc & aDesc);

	/**

	* From CProtocolPostHook Handles attach to the stack

	* @since

	* @return void

	*/

	void NetworkAttachedL();

	/**

	* From CProtocolPostHook Handles detach from the stack

	* @since

	* @return void

	*/

	void NetworkDetached();

	/**

	 * From MIp6Hook Handles received packets. 

	 * @since 

	 * @param aPacket Packet received.

	 * @param aInfo Info structure.

	 * @return void

	 */       

	virtual TInt ApplyL (RMBufHookPacket & /* aPacket */ ,

						 RMBufRecvInfo & /* aInfo */ );

	/**

	 * From MIp6Hook Handles outbound opening. 

	 * @since 

	 * @param aHead Flow-specific precomputed data.

	 * @param aFlow Flow.

	 * @return void

	 */       

	virtual MFlowHook *OpenL (TPacketHead & aHead, CFlowContext * aFlow);

	private:    // Data

	// Configuration data

	CESockIniData *iConfig;

	// Non-zero if configuration file is not available

	TInt iConfigErr; 

	// Parser object for the configured tunnels

	TTunnelParser iTunnelParser;

	// Event service

	MEventService *iEventService;

	// Object for receiving events

	C6to4Listener *iEventListener;

	// Interface index of the automatic 6to4 tunnels

	TUint32 iInterfaceIndex;

	};

#endif      // __6TO4_H   

// End of File