/*

* Copyright (c) 2005 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 CMCENATACTIONS_H

#define CMCENATACTIONS_H

#include <e32base.h>

#include "mcedefs.h"

class TMceNatStateTransitionEvent;

class CMceComSession;

class CSdpDocument;

const TInt KMceNatNonFatalErrorLimit = -11000;

typedef TUint TMceNatOfferedSdp;

const TMceNatOfferedSdp KMceNatOfferSdp = 0;

const TMceNatOfferedSdp KMceNatPrevOfferSdp = 1;

/**

*  MCE NAT SIP actions given to a single state.

*

*  @lib 

*  @since

*/

class MMceNatActions

	{

public: // New functions

	/**

	* Creates offer.

	*/

    virtual TInt CreateOfferL() = 0;

	/**

	* Creates answer, and afterwards decodes offer.

	*/

    virtual TInt ResolveL() = 0;

	/**

	* Decodes answer.

	*/

    virtual TInt DecodeAnswerL() = 0;

	/**

	* Updates MT/(MO) INVITE to NAT plugin, takes sdp doc from Offer()

	*/

    virtual void UpdateL() = 0;

    /**

    * Any existing mcc streams have probably wrong transport addres,

    * this method is used to update correct address to mcc streams.

    */

    virtual void UpdateRemoteAddressL() = 0;

    /**

    * Sets flag state which indicates which Sdp document is valid for sending

    * out to NET. Usually NOT loopback/local address Sdp's !!

    */

    virtual void SetOffered( TMceNatOfferedSdp aOffered ) = 0;

    /**

    * Replaces current SdpSession pointer with the current Offer.

    */

    virtual void SdpCleanup( CSdpDocument* aPrev, CSdpDocument* aRep ) = 0;

    /**

    * Called by state machine after NAT processing is completed.

    */

    virtual void Continue() = 0;

	/**

	* State of the state machine is changed via this method.

	*/

    virtual void StateChangedL( TMceNatStateTransitionEvent& aEvent,

                                TUint aNewState ) = 0;

	/**

	* Set Need to receive forces MCE to send provisional response reliably.

	* used if resource reservation is needed.

	*/

	virtual void SetNeedtoReceive() = 0; 

	/**

	* Get the Resource Reservation Status, returns the resource reservation status

	*/

	virtual TInt GetResourceReservationStatus() = 0; 

	virtual TMceReturnStatus GetReservationStatus() = 0;

	virtual void SetReservationStatus(TMceReturnStatus aStatus) = 0;

	/**

	* Continue processing NAT updated event, that was delayed because NAT plugin

	* had not yet been initialized.

	*/

	virtual void ResumeNatUpdated() = 0;

	};

#endif // CMCENATACTIONS_H

// End of File