/*

* Copyright (c) 2005-2009 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          : MSigComp.h

* Part of       : ConnectionMgr

* Version       : SIP/4.0 

*

*/

/**

 @internalComponent

*/

#ifndef MSIGCOMP_H

#define MSIGCOMP_H

#include <e32std.h>

class MSigComp

	{

public:

    /**

     * Destructor.

	 */

	virtual ~MSigComp () {}

    /**

     * Checks if signalling compression is installed.

     *

     * @returns ETrue if installed, EFalse otherwise.

	 */

    virtual TBool IsSupported () const = 0;

    /**

     * After calling this function ConnectionMgr always uses

     * signalling compression for requests sent with 

     * the returned compartment ID.

     * Multiple users can share a compartment to a 

     * next hop identified by TInetAddr.

     * The compartment ID and the TInetAddr are bound together 

     * when the first request towards the TInetAddr is sent.

     * Multiple comparment IDs can point to the same TInetAddr.

     *

     * @param aIapId the IAP used for the compartment

     *

     * @returns a generated ID for the compartment

	 */

    virtual TUint32 CreateCompartmentL(TUint32 aIapId) = 0;

    /**

     * Removes compartment identified by the compartment ID

     *

     * @param aCompartmentId the compartment ID

	 */

    virtual void RemoveCompartment(TUint32 aCompartmentId) = 0;

	/**

     * The function returns count of compartments

     *

     * @returns	count of compartments

     */

	virtual TInt CompartmentCount() = 0;

	/**

     * If the compartment has been previously used for decompressing,

     * resets the compartment. If not, deletes the compartment. 

     *

     * @param aCompartmentId the compartment ID

     */

	virtual void SendFailedL(TUint32 aCompartmentId) = 0;

	};

#endif // MSIGCOMP_H

// End of File