/*

* 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 CNATFWUNSAFCHANGEREQUESTATTRIBUTE_H

#define CNATFWUNSAFCHANGEREQUESTATTRIBUTE_H

// INCLUDES

#include "natfwunsafattribute.h"

// FORWARD DECLARATIONS

// CLASS DECLARATION

/**

 * Class for NATFWUNSAF CHANGE-REQUEST attribute.

 */

class CNATFWUNSAFChangeRequestAttribute : public CNATFWUNSAFAttribute

    {

    public: // Constructors and destructor

        /**

        * Creates a new instance of CNATFWUNSAFChangeRequestAttribute

        * @param aChangeIP Change IP flag

        * @param aChangePort Change port flag

        * @return A new instance of CNATFWUNSAFChangeRequestAttribute

        *          ownership is transferred.

        */

        static CNATFWUNSAFChangeRequestAttribute*

            NewL(TBool aChangeIP, TBool aChangePort);

        /**

        * Creates a new instance of CNATFWUNSAFChangeRequestAttribute and

        * pushes it to the CleanupStack.

        * @param aChangeIP Change IP flag

        * @param aChangePort Change port flag

        * @return A new instance of CNATFWUNSAFChangeRequestAttribute,

        *          ownership is transferred.

        */

        static CNATFWUNSAFChangeRequestAttribute*

            NewLC(TBool aChangeIP, TBool aChangePort);

        /**

        * Decodes a UNSAF 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);

        /**

        * Destructor, deletes the resources of

        * CNATFWUNSAFChangeRequestAttribute.

        */

        ~CNATFWUNSAFChangeRequestAttribute();

    public: // From CNATFWUNSAFAttribute

        CNATFWUNSAFAttribute::TType Type() const;

        HBufC8* EncodeValueL() const;

    public: // New functions

        /**

        * Returns the change IP flag.

        * @return Flag value

        */

        TBool ChangeIP() const;

        /**

        * Returns the change port flag.

        * @return Flag value

        */

        TBool ChangePort() const;

    private:

        enum TEncodedValue

            {

            //Bit masks for obtaining the flag bits

            EChangeIPMask = 0x4,

            EChangePortMask = 0x2,

            //Size in bytes of the attribute value

            EAttributeValueSize = 4

            };

    private: // Constructors

        CNATFWUNSAFChangeRequestAttribute(TBool aChangeIP, TBool aChangePort);

    private: // Data

        TBool iChangeIP;

        TBool iChangePort;

    private: // For testing purposes

        __DECLARE_TEST;

    };

#endif // CNATFWUNSAFCHANGEREQUESTATTRIBUTE_H