--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/sipplugins/sippwlanplugin/inc/sipnetworkobserver.h	Tue Feb 02 01:03:15 2010 +0200
@@ -0,0 +1,64 @@
+/*
+* 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