--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/multimediacommsengine/mmcesrv/mmceserver/inc/mcenatstate.h	Tue Feb 02 01:04:58 2010 +0200
@@ -0,0 +1,109 @@
+/*
+* 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 CMCENATSTATE_H
+#define CMCENATSTATE_H
+
+#include <e32base.h>
+
+class TMceNatStateTransitionEvent;
+
+//state indexes
+typedef TUint TMceNatStateIndex;
+
+const TMceNatStateIndex KMceNatStateInitializing = 0;
+const TMceNatStateIndex KMceNatStateIdle = 1;
+const TMceNatStateIndex KMceNatStateCreateOffer = 2;
+const TMceNatStateIndex KMceNatStateCreateAnswer = 3;
+const TMceNatStateIndex KMceNatStateDecodeOffer = 4;
+const TMceNatStateIndex KMceNatStateDecodeAnswer = 5;
+const TMceNatStateIndex KMceNatStateWait = 6;
+const TMceNatStateIndex KMceNatStateConnected = 7;
+const TMceNatStateIndex KMceNatStateCreateOfferRequested = 8;
+
+/**
+*  MCE SIP state transition handler
+*
+*  @lib 
+*  @since
+*/
+class MMceNatStateTransitionHandler
+	{
+
+public:
+
+	/**
+	* Hanldes state transition message and executes
+	* necessary actions
+	* @param aEvent atransition event
+	*/
+    virtual void EntryL( TMceNatStateTransitionEvent& aEvent ) = 0;
+
+	/**
+	* Resolves state to which current state exit
+	* @param aEvent atransition event
+	*/
+    virtual void ExitL( TMceNatStateTransitionEvent& aEvent ) = 0;
+	
+	};
+
+/**
+*  MCE SIP state machine
+*
+*  @lib 
+*  @since
+*/
+class CMceNatState : public CBase
+	{
+	
+public: // Constructors and destructor
+    
+	/**
+	* Destructor.
+	*/
+	virtual ~CMceNatState();
+
+
+public: // New functions
+
+	/**
+	* Checks if state accepts event
+	* @param aEvent atransition event
+	*/
+    virtual TBool Accept( TMceNatStateTransitionEvent& aEvent ) = 0;
+    
+	/**
+	* Returns transition handler
+	* @return transition handler
+	*/
+    virtual MMceNatStateTransitionHandler& TransitionHandler() = 0;
+
+
+protected: // Constructors and destructor
+
+	/**
+	* Constructor
+	*/
+    CMceNatState();
+
+	};
+
+#endif // CMCENATSTATE_H
+
+// End of File