diff -r 000000000000 -r 1bce908db942 natplugins/natpnatfwsdpprovider/inc/nspinterface.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/natplugins/natpnatfwsdpprovider/inc/nspinterface.h	Tue Feb 02 01:04:58 2010 +0200
@@ -0,0 +1,173 @@
+/*
+* 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:  Plugin interface implementation, class description.
+*
+*/
+
+#ifndef NSPINTERFACE_H
+#define NSPINTERFACE_H
+
+#include "nspplugin.h"
+#include "nsputdefinitions.h"
+
+class CNSPController;
+
+/**
+ *  NAT FW Sdp plugin interface implementation.
+ *
+ *  This class implements 'CNSPPlugin' ECOM interface.
+ *
+ *  @lib natfwsdpprovider.dll
+ *  @since S60 3.2
+ */
+class CNSPInterface : public CNSPPlugin
+    {
+public: // Constructors and destructor
+
+    /**
+     * A two-phase constructor.
+     */
+    static CNSPInterface* NewL();
+    
+    /**
+     * Destructor.
+     */
+    virtual ~CNSPInterface();
+
+
+private: // Constructors and destructor
+
+    CNSPInterface();
+    
+    void ConstructL();
+
+
+public: // From CNSPPlugin
+
+    /**
+     * Creates session object, and returns a handle to that object.
+     * Client of the class uses services via this handle.
+     *
+     * @since       S60 3.2
+     * @param       aSessionObserver    Observer for created session, 
+     *                                  for async callbacks.
+     * @param       aIapId              Internet access point identifier, unique.
+     * @param       aProtocol           Used transport protocol, values are:
+     *                                  1 = TCP
+     *                                  2 = UDP
+     * @return      Session identifier, via this handle session is used.
+     */
+    TUint NewSessionL( MNSPSessionObserver& aSessionObserver,
+            TUint32 aIapId, const TDesC8& aDomain, TUint aProtocol );
+    
+    /**
+     * With this call NAT FW session is terminated.
+     *
+     * @since       S60 3.2
+     * @param       aSessionId          Session unique identier.
+     */
+    void CloseSessionL( TUint aSessionId );
+    
+    /**
+     * Sets the value of a session parameter.
+     * 
+     * @param       aSessionId          The ID identifying session.
+     * @param       aParamKey           identifies the parameter.
+     * @param       aParamValue         value of the parameter.
+     * @return      KErrNotFound if the key is not found or
+     *              other system wide error code on failure.
+     */
+    TInt SetSessionParam( TUint aSessionId, TNSPSessionParamKey aParamKey,
+            TUint aParamValue );
+    
+    /**
+     * Gets the value of a session parameter.
+     * 
+     * @param       aSessionId          The ID identifying session.
+     * @param       aParamKey           identifies the parameter.
+     * @return      value of the parameter or
+     *              KErrNotFound if the value is not available or
+     *              other system wide error code on failure.
+     */
+    TInt GetSessionParam( TUint aSessionId, TNSPSessionParamKey aParamKey );
+    
+    /**
+     * Initial NAT FW specific SDP content added in here.
+     *
+     * @since       S60 3.2
+     * @param       aSessionId          Session unique identier.
+     * @param       aOffer              Sdp offer document
+     */
+    TNatReturnStatus CreateOfferL( TUint aSessionId, CSdpDocument*& aOffer );
+    
+    /**
+     * NAT FW specific SDP content is added to both Offer and Answer.
+     *
+     * @since       S60 3.2
+     * @param       aSessionId          Session unique identier.
+     * @param       aOffer              Sdp offer document
+     * @param       aAnswer             Sdp answer document
+     */
+    TNatReturnStatus ResolveL( TUint aSessionId,
+            CSdpDocument*& aOffer, CSdpDocument*& aAnswer );
+    
+    /**
+     * Answer to initial Answer interpred in here.
+     *
+     * @since       S60 3.2
+     * @param       aSessionId          Session unique identier.
+     * @param       aAnswer             Sdp answer document.
+     */
+    TNatReturnStatus DecodeAnswerL( TUint aSessionId, CSdpDocument*& aAnswer );
+    
+    /**
+     * Offer can be updated while ResolveL is still ongoing, i.e.
+     * OfferReady callback is not yet received.
+     *
+     * @since       S60 3.2
+     * @param       aSessionId          Session unique identier.
+     * @param       aOffer              Sdp offer document.
+     */
+    void UpdateL( TUint aSessionId, CSdpDocument*& aOffer );
+    
+    /**
+     * Empty INVITE, with certain NAT protocols, can be interpret as request
+     * to restart connection checks. This method must be called if such
+     * a message is received.
+     *
+     * @since       S60 3.2
+     * @param       aSessionId          Session unique identier.
+     * @return      NAT status, if async signaling expected.
+     */
+    TNatReturnStatus RestartL( TUint aSessionId );
+
+
+private: // data
+
+    /**
+     * Controller object, which is used to find sessions and check Sdp.
+     * Own.
+     */
+    CNSPController* iController;
+    
+    /**
+     * Definitions for unit testing.
+     */
+    NSP_UT_DEFINITIONS
+
+    };
+
+#endif // NSPINTERFACE_H
+
+// end of file