/*

* 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        : TStateActiveResolving.h

* Part of     : NetworkMonitor

* See class definition below.

* Version     : SIP/4.0

*

*/

#ifndef __TSTATEACTIVERESOLVING_H__

#define __TSTATEACTIVERESOLVING_H__

// INCLUDES

#include "TStateBase.h"

#include "Lwtimer.h"

// CONSTANTS

const TUint KInitialResolvingTimer( 1000 ); // milliseconds

const TUint KStartDoublingTimerValue( 4000 ); // milliseconds

const TUint KMaximumResolvingTimer( 32000 ); // milliseconds

// CLASS DEFINITION

/**

 * TStateActiveResolving implements the Active:Resolving state

 */

class TStateActiveResolving

	: public TStateBase,

	  public MExpirationHandler

	{

	public:	// Constructors and destructor

		/**

		 * Constructor.

		 * @param aOwner State model that owns us.

		 * @param aContext Reference to SIP connection context

		 */

		TStateActiveResolving( MStateModel& aOwner,

							   MSIPConnectionContext& aContext,

							   MTimerManager& aTimer )

			: TStateBase( aOwner, aContext ), 

			  iTimer( aTimer ),

			  iTimerId( 0 ),

			  iTimerValue( KInitialResolvingTimer ),

			  iCumulativeTimerValue( KInitialResolvingTimer ) {}

	public: // From TStateBase

		void Enter( TInt aError );

		void Exit();

		void NetworkStateChanged( MSIPNetworkObserver::TNetworkState aState,

								  TInt aError );

	public: // From MExpirationHandler

		void TimerExpiredL( TTimerId aTimerId, TAny* aTimerParam );

	private: // New methods

		/// @return ETrue if MSIPConnectionContext has a valid IP address

		TBool HasAddress();

		TUint CalculateTimerValue();

		void EnterActiveResolvedState();

	private: // Data

		/// Reference to the global timer manager.

		MTimerManager& iTimer;

		/// Handle to our timer (when active)

		TTimerId iTimerId;

		TUint iTimerValue;

		TUint iCumulativeTimerValue;

	private: // For unit testing purposes

#ifdef CPPUNIT_TEST

	    friend class CStateModel_test;

#endif

	};

#endif // __TSTATEACTIVERESOLVING_H__