/*

* Copyright (c) 2006-2007 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:   

*

*/

#ifndef CNATFWUNSAFXORMAPPEDADDRESSATTRIBUTE_H

#define CNATFWUNSAFXORMAPPEDADDRESSATTRIBUTE_H

// INCLUDES

#include "natfwunsafaddressattribute.h"

#include "natfwunsaftransactionid.h"

// FORWARD DECLARATIONS

// CLASS DECLARATION

/**

 * Class for XOR-MAPPED-ADDRESS attribute.

 */

class CNATFWUNSAFXorMappedAddressAttribute : public CNATFWUNSAFAddressAttribute

    {

    public: // Constructors and destructor

        /**

        * Decodes an attribute from a byte stream.

        * This version is for lookup table.

        * @param aByteStream Byte stream, containing attribute type,

        *        length and value.

        * @return Decoded UNSAF attribute, ownership is transferred.

        */

        static CNATFWUNSAFAttribute* DecodeAttributeL(

            const TDesC8& aByteStream);

        /**

        * Creates a new instance of CNATFWUNSAFXorMappedAddressAttribute

        * @param aAddress the address

        * @param aTransactionID transaction ID to be used when

        *        encoding the attribute value.

        * @return A new instance of CNATFWUNSAFXorMappedAddressAttribute

        *         ownership is transferred.

        */

        IMPORT_C static CNATFWUNSAFXorMappedAddressAttribute* NewL(

            const TInetAddr& aAddress,

            const TNATFWUNSAFTransactionID& aTransactionID);

        /**

        * Creates a new instance of CNATFWUNSAFXorMappedAddressAttribute and

        * pushes it to the CleanupStack.

        * @param aAddress the address

        * @param aTransactionID transaction ID to be used when

        *        encoding the attribute value.

        * @return A new instance of CNATFWUNSAFXorMappedAddressAttribute,

        *         ownership is transferred.

        */

        IMPORT_C static CNATFWUNSAFXorMappedAddressAttribute* NewLC(

            const TInetAddr& aAddress,

            const TNATFWUNSAFTransactionID& aTransactionID);

        /**

        * Destructor, deletes the resources of

        * CNATFWUNSAFXorMappedAddressAttribute.

        */

        ~CNATFWUNSAFXorMappedAddressAttribute();

    public: // From CNATFWUNSAFAttribute

        CNATFWUNSAFAttribute::TType Type() const;

    public: // New functions

        /**

        * Sets the transaction ID used when encoding the attribute value.

        * @param aTransactionID transaction ID to be used when

        *        encoding the attribute value.

        */

        void SetTransactionIdL(const TNATFWUNSAFTransactionID& aTransactionID);

        /**

        * Gets the transaction ID used when encoding the attribute value.

        */

        const TNATFWUNSAFTransactionID& TransactionID() const;

        /**

        * Sets the transaction ID used when encoding the attribute value.

        * Modifies the address by XORing it with the new transaction ID.

        * @param aTransactionID transaction ID to be used when

        *        encoding the attribute value.

        */

        IMPORT_C void SetTransactionIDAndXorL(

            const TNATFWUNSAFTransactionID& aTransactionID);

    private: // From CNATFWUNSAFAddressAttribute

        virtual void EncodeAddressL(TDes8& aResult) const;

    private: // New functions

        TUint16 XorPort() const;

        TInetAddr XorAddress() const;

    private: // Constructors

        CNATFWUNSAFXorMappedAddressAttribute();

        CNATFWUNSAFXorMappedAddressAttribute(const TInetAddr& aAddress);

    private: // Data

        TNATFWUNSAFTransactionID iTransactionID;

    };

#endif // CNATFWUNSAFXORMAPPEDADDRESSATTRIBUTE_H