--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/natplugins/natpnatfwsdpprovider/inc/nspstatebase.h	Tue Feb 02 01:04:58 2010 +0200
@@ -0,0 +1,158 @@
+/*
+* 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:  Base class description for all session states.
+*
+*/
+
+#ifndef NSPSTATEBASE_H
+#define NSPSTATEBASE_H
+
+#include <e32base.h>
+
+typedef TInt TNSPStateIndex;
+const TNSPStateIndex KStateIndexInitializing = 0;
+const TNSPStateIndex KStateIndexIdle = 1;
+const TNSPStateIndex KStateIndexLocalCand = 2;
+const TNSPStateIndex KStateIndexNegotiating = 3;
+const TNSPStateIndex KStateIndexResolving = 4;
+const TNSPStateIndex KStateIndexActivating = 5;
+const TNSPStateIndex KStateIndexConnected = 6;
+const TNSPStateIndex KStateIndexDeActivating = 7;
+
+class TNSPStateMachineEvent;
+
+/**
+ *  Base class for all states.
+ *
+ *  Defines a set of methods, which are used by state machine.
+ *  Each state has own definitions for these methods, and
+ *  therefore different behavior.
+ *
+ *  @lib natfwsdpprovider.dll
+ *  @since S60 3.2
+ */
+class CNSPStateBase : public CBase
+    {
+public: // Constructors and destructor
+ 
+    /**
+     * Destructor.
+     */
+    virtual ~CNSPStateBase();
+
+
+protected: // Constructors and destructor
+
+    /**
+     * Constructor.
+     */
+    CNSPStateBase();
+
+
+public: // New functions
+
+    /**
+     * Called to check if individual state accepts event, i.e.
+     * whether to execute DoApplyL.
+     *
+     * @since       S60 3.2
+     * @param       aEvent          State machine event.
+     * @return      ETrue if transition is consumed, EFalse otherwise.
+     */
+    TBool AcceptL( TNSPStateMachineEvent& aEvent );
+    
+    /**
+     * Called when the state is entered.
+     * 
+     * @since       S60 3.2
+     * @param       aEvent          State machine event.
+     */
+    void StateEntryL( TNSPStateMachineEvent& aEvent );
+    
+    /**
+     * Called when state entry to next state will leave, and return
+     * into 'this' state must be done.
+     *
+     * @since       S60 3.2
+     * @param       aEvent          State machine event.
+     */
+    void Reverse( TNSPStateMachineEvent& aEvent );
+    
+    /**
+     * Current state is applied with this method.
+     * 
+     * @since       S60 3.2
+     * @param       aEvent          State machine event.
+     */
+    void ApplyL( TNSPStateMachineEvent& aEvent );
+    
+    /**
+     * Current state is exited with this method.
+     * 
+     * @since       S60 3.2
+     * @param       aEvent          State machine event.
+     */
+    void ExitL( TNSPStateMachineEvent& aEvent );
+
+
+protected:  // New functions
+
+    /**
+     * Called to check if individual state accepts event, i.e.
+     * whether to execute DoApplyL.
+     *
+     * @since       S60 3.2
+     * @param       aEvent          State machine event.
+     * @return      ETrue if event is accepted, EFalse otherwise.
+     */
+    virtual TBool DoAcceptL( TNSPStateMachineEvent& aEvent ) = 0;
+    
+    /**
+     * Called when the state is entered.
+     *
+     * @since       S60 3.2
+     * @param       aEvent          State machine event.
+     */
+    virtual void DoStateEntryL( TNSPStateMachineEvent& aEvent ) = 0;
+    
+    /**
+     * Called when state entry to next state will leave, and return
+     * into 'this' state must be done. Inverse of DoExitL - method.
+     *
+     * @since       S60 3.2
+     * @param       aEvent          State machine event.
+     */
+    virtual void DoReverse( TNSPStateMachineEvent& aEvent ) = 0;
+    
+    /**
+     * Current state is applied with this method.
+     *
+     * @since       S60 3.2
+     * @param       aEvent          State machine event.
+     */
+    virtual void DoApplyL( TNSPStateMachineEvent& aEvent ) = 0;
+    
+    /**
+     * Current state is exited with this method.
+     *
+     * @since       S60 3.2
+     * @param       aEvent          State machine event.
+     */
+    virtual void DoExitL( TNSPStateMachineEvent& aEvent ) = 0;
+    
+    };
+
+#endif // NSPSTATEBASE_H
+
+// end of file