--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/inc/mnatfwconnectivityobserver.h	Tue Feb 02 01:04:58 2010 +0200
@@ -0,0 +1,99 @@
+/*
+* Copyright (c) 2007 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 M_NATFWCONNECTIVITYOBSERVER_H
+#define M_NATFWCONNECTIVITYOBSERVER_H
+
+#include <e32base.h>
+
+class CNATFWCandidatePair;
+class CNATFWCandidate;
+
+/**
+ *  Observer interface for clients to receive events from NATFW.
+ *
+ *  @lib natconfw.lib
+ *  @since S60 v3.2
+ */
+class MNATFWConnectivityObserver
+    {
+
+public:
+
+    /**  NAT connectivity framework events. */
+    enum TNATFWConnectivityEvent
+        {
+        /** Completing event for CreateSessionL. */
+        ESessionCreated         = 0x0001,
+
+        /** This event is triggered when a new local candidate has been
+        found. Eventdata is an instance of CNATFWCandidate class. Ownership
+        of the candidate is transferred. */
+        ELocalCandidateFound    = 0x0002,
+
+        /** Completing event for FetchCandidate(s). */
+        EFetchingCompleted      = 0x0004,
+
+        /** Completing event for SetReceivingStateL. */
+        EReceivingActivated     = 0x0008,
+
+        /** Completing event for SetReceivingStateL. */
+        EReceivingDeactivated   = 0x0010,
+
+        /** Completing event for SetSendingStateL. */
+        ESendingActivated       = 0x0020,
+
+        /** Completing event for SetSendingStateL. */
+        ESendingDeactivated     = 0x0040,
+
+        /** This event is triggered when a new working ICE candidate pair
+        has been found. Eventdata is an instance of CNATFWCandidatePair class.
+        Ownership of the candidate pair is transferred.*/
+        ECandidatePairFound     = 0x0080,
+
+        /** Completing event for PerformConnectivityChecksL. */
+        EConnChecksCompleted    = 0x0100,
+
+        /** This event is triggered when an error within a stream has occured
+        and no asynchnorous operation is ongoing. Error during asynchronous
+        operation is reported by completing that operation with error code.*/
+        EGeneralError           = 0x0200,
+
+        /** Defines all the supported events. Can only be used for registering
+        and unregistering observers for events.*/
+        EAllEvents              = 0x03ff
+
+        };
+
+    /**
+     * Notifies about NAT connectivity framework events.
+     *
+     * @since   S60 v3.2
+     * @param   aSessionId  The session identifier
+     * @param   aStreamId   The stream identifier
+     * @param   aEvent      The event
+     * @param   aError      The error code
+     * @param   aEventData  Optional event data specified by particular event
+     */
+    virtual void EventOccured( TUint aSessionId, TUint aStreamId,
+        TNATFWConnectivityEvent aEvent, TInt aError, TAny* aEventData ) = 0;
+    };
+
+#endif // M_NATFWCONNECTIVITYOBSERVER_H