/*

* 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:  See class definition below.

*

*/

#ifndef MSIPNETWORKOBSERVER_H

#define MSIPNETWORKOBSERVER_H

// INCLUDES

#include <e32std.h>

// CLASS DECLARATION

/**

* @publishedPartner

*

* MSIPNetworkObserver defines an interface for observing network state changes.

*/

class MSIPNetworkObserver

	{

	public: // Enumerations

		/// Network states

		enum TNetworkState

			{

			ENetworkUnknown,

			ENetworkConnected,

			ENetworkInactive,

			ENetworkActive,

			ENetworkSuspended,

			EConnectionLost

			};

	protected: // Constructors and destructors

		/// Virtual destructor. Prohibit deletion through this interface.

		virtual ~MSIPNetworkObserver() {};

	public: // Abstract methods

		/**

		 * Called by a when the network state has changed.

		 *

		 * @param aState Current network state

		 * @param aError KErrNone if state was changed succesfully, otherwise

		 *				 one of the system-wide error codes.

		 */

		virtual void NetworkStateChanged( 

		    MSIPNetworkObserver::TNetworkState aState,

		    TInt aError ) = 0;

	};

#endif // MSIPNETWORKOBSERVER_H