/*

* 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_flow.h

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

* Implements 6to4 automatic and configured tunnels, see

* RFC 3056 & RFC 2893

* Version     : 0.2

*

*/

/**

 @internalComponent

*/

#ifndef __6TO4_FLOW_H

#define __6TO4_FLOW_H

//  INCLUDES

#include <e32base.h>

#include <ip6_hook.h>

#include "6to4.h"

#include "6to4_tunnel.h"

// CONSTANTS

// MACROS

// DATA TYPES

// FUNCTION PROTOTYPES

// FORWARD DECLARATIONS

// CLASS DECLARATION

class MNetworkService;

/**

*  6to4 flow hook

*  Keeps information on a 6to4 flow.

*

*  @lib 

*  @since 

*/

class C6to4FlowInfo : public CBase, public MFlowHook

	{

	public:	// Constructors & destructors

	C6to4FlowInfo(const TPacketHead &aHead);

	~C6to4FlowInfo();

	public: // New functions

	public: // Functions from base classes

	/**

	 * From MFlowHook Open and Close implements reference counting system.

	 * @since

	 * @param

	 * @return void

	 */

	void Open ();

	/**

	 * From MFlowHook Informs stack if the hook is ready. Can update address

	 * information.

	 * @since

	 * @param aHead Address information of the flow.

	 * @return TInt 0 => ready, >0 => pending, <0 => error.

	 */

	TInt ReadyL (TPacketHead & aHead);

	/**

	 * Called by IP when processing outbound packet.

	 * @since

	 * @param aPacket Complete packet

	 * @param aInfo Information block associated with the packet

	 * @return TInt 0 => processed, <0 => discarded, >0 => restart processing

	 */

	TInt ApplyL (RMBufSendPacket & aPacket, RMBufSendInfo & aInfo);

	/**

	 * From MFlowHook Open and Close implements reference counting system.

	 * @since

	 * @param

	 * @return void

	 */

	void Close ();

	private:    // Data

	// Reference count

	TInt iRefs;

	// Inner interface index

	const TUint32 iInterfaceIndex;

	TInet6HeaderIP iInnerIp;

	TUint32 iSrcId;	// inner only

	TUint32 iDstId;	// inner only

	TInet6HeaderIP iOuterIp;

	TUint16 iSrcPort;

	TUint16 iDstPort;

	TUint8 iIcmpType;

	TUint8 iIcmpCode;

	TUint8 iProtocol;	

	// Fixed packet content. Hooks may add in their ReadyL some fixed

	// packet content (extension headers in IPv6) into (TPacketHead::iOffset,

	// TPacketHead::iPacket). The ReadyL of a tunneling hook *MUST* save

	// and remove this information from the TPacketHead, because it belongs

	// under the outer IP header (which the tunneling hook inserts). The

	// tunneling hook, in addition to adding the outer IP header in ApplyL,

	// must also copy the fixed packet content, if any is present.

	TInt iOffset;			// > 0, if there is fixed packet content.

	RMBufChain iPacket;

	// TODO

	TUint16 iPacketID;

	};

#endif      // __6TO4_FLOW_H   

// End of File