--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/multimediacommsengine/mmcesrv/mmceserver/src/mcenatstatecreateanswer.cpp	Tue Feb 02 01:04:58 2010 +0200
@@ -0,0 +1,202 @@
+/*
+* 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:  
+*
+*/
+
+
+
+#include "mcenatstatecreateanswer.h"
+#include "mcenatsipsession.h"
+#include "mcenatactions.h"
+#include "mcenatevents.h"
+#include "mceactionset.h"
+#include "mceclientserver.h"
+#include "mcesrvlogs.h"
+#include "nspplugin.h"
+
+// -----------------------------------------------------------------------------
+// CMceNatStateCreateAnswer::CMceNatStateCreateAnswer
+// -----------------------------------------------------------------------------
+//
+CMceNatStateCreateAnswer::CMceNatStateCreateAnswer()
+	{
+	}
+
+// -----------------------------------------------------------------------------
+// CMceNatStateCreateAnswer::~CMceNatStateCreateAnswer
+// -----------------------------------------------------------------------------
+//
+CMceNatStateCreateAnswer::~CMceNatStateCreateAnswer()
+	{
+	}
+
+// -----------------------------------------------------------------------------
+// CMceNatStateCreateAnswer::Accept
+// -----------------------------------------------------------------------------
+//
+TBool CMceNatStateCreateAnswer::Accept( TMceNatStateTransitionEvent& aEvent )
+    {
+    if ( EMceNatAnswer == aEvent.NatCode() ||
+         ( EMceNatHandleSIP == aEvent.NatCode() &&
+           EMceInvite == aEvent.Code() )||
+         EMceNatError == aEvent.NatCode() ||
+         EMceNatICMPError == aEvent.NatCode() )
+        {
+        return ETrue;
+        }
+    else
+        {
+        return EFalse;
+        }
+    }
+
+// -----------------------------------------------------------------------------
+// CMceNatStateCreateAnswer::EntryL
+// -----------------------------------------------------------------------------
+//
+void CMceNatStateCreateAnswer::EntryL( TMceNatStateTransitionEvent& aEvent )
+	{
+	MCESRV_DEBUG( "*** CMceNatStateCreateAnswer::EntryL, Entry" );
+    
+    aEvent.Session().Actions().EncodeL();
+    TMceReturnStatus status = aEvent.NatActions().ResolveL();
+        
+    if ( KMceReady == status )
+	    {
+	    CMceSipSession& session = aEvent.Session();
+	    
+        aEvent.NatCode() = ( KMceReady == aEvent.ParamStatus() ?
+                EMceNatSync : aEvent.NatCode() );
+	    
+        aEvent.NatActions().SetOffered( KMceNatPrevOfferSdp );
+        session.Actions().DecodeL(); 
+        aEvent.NatActions().UpdateRemoteAddressL();
+        
+        CSdpDocument* previous = session.Offer();
+        aEvent.NatActions().SetOffered( KMceNatOfferSdp );
+        aEvent.NatActions().SdpCleanup( previous, session.Offer() );
+       
+	    aEvent.NatActions().StateChangedL( aEvent, KMceNatStateConnected );
+	    	    
+	    }
+    else
+        {
+        aEvent.ParamStatus() = status;
+        }
+    
+	MCESRV_DEBUG( "*** CMceNatStateCreateAnswer::EntryL, Exit" );
+	}
+
+// -----------------------------------------------------------------------------
+// CMceNatStateCreateAnswer::ExitL
+// -----------------------------------------------------------------------------
+//
+void CMceNatStateCreateAnswer::ExitL( TMceNatStateTransitionEvent& aEvent )
+	{
+	MCESRV_DEBUG( "*** CMceNatStateCreateAnswer::ExitL, Entry" );
+    
+	switch ( aEvent.NatCode() )
+	    {
+	    case EMceNatError:
+	    case EMceNatICMPError:
+	        {
+	        ExitErrorL( aEvent );
+	        break;
+	        }
+	    case EMceNatHandleSIP:
+	        {
+	        ExitHandleInviteL( aEvent );
+	        break;
+	        }
+	    default:
+	        {
+	        ExitDefaultL( aEvent );
+	        break;
+	        }
+	    }
+    
+	MCESRV_DEBUG( "*** CMceNatStateCreateAnswer::ExitL, Exit" );	
+	}
+
+// -----------------------------------------------------------------------------
+// CMceNatStateCreateAnswer::ExitErrorL
+// -----------------------------------------------------------------------------
+//
+void CMceNatStateCreateAnswer::ExitErrorL( TMceNatStateTransitionEvent& aEvent )
+    {
+    
+    TMceStateIndex sipState = aEvent.Session().CurrentState().Id();
+          
+    if ( aEvent.ParamStatus() > KMceNatNonFatalErrorLimit )
+        {
+        aEvent.Session().Actions().ClientErrorOccured( aEvent.ParamStatus() );
+        }
+    
+    
+    if (( aEvent.NatCode() == EMceNatICMPError && 
+    		KMceStateEstablished == sipState ) || 
+    		aEvent.NatCode() == EMceNatError )  
+    	{
+    	aEvent.NatActions().Continue();
+    	User::Leave( aEvent.ParamStatus() );		
+    	}
+       
+    }
+
+// -----------------------------------------------------------------------------
+// CMceNatStateCreateAnswer::ExitHandleInviteL
+// -----------------------------------------------------------------------------
+//
+void CMceNatStateCreateAnswer::ExitHandleInviteL( TMceNatStateTransitionEvent& aEvent )
+    {
+    CMceSipSession& session = aEvent.Session();
+    
+    if ( MceSip::HasContent( session.Request() ) )
+        {
+        // Incoming INVITE contained new SDP, which can contain new candidates,
+        // hence it is given to NAT FW - without state update.
+        User::LeaveIfError( session.Actions().CreateSDP( session.Request() ) );
+        aEvent.NatActions().UpdateL();
+        }
+    
+    // Not consumed, done by SIP state machine
+    aEvent.NatActions().Continue();
+    }
+
+// -----------------------------------------------------------------------------
+// CMceNatStateCreateAnswer::ExitDefaultL
+// -----------------------------------------------------------------------------
+//
+void CMceNatStateCreateAnswer::ExitDefaultL( TMceNatStateTransitionEvent& aEvent )
+    {
+	
+	// Check if plugin has flag setup if yes signall that at the session level.
+	TInt status = aEvent.NatActions().GetResourceReservationStatus();
+	
+	if ( status == CNSPPlugin::ENSPResourcesNotReserved )
+		{
+		aEvent.NatActions().SetNeedtoReceive();	
+		}
+	
+    User::LeaveIfNull( aEvent.Document() );
+    CMceSipSession& session = aEvent.Session();
+    
+    CSdpDocument* previous = session.Offer();
+    aEvent.Session().SetOffer( aEvent.Document() );
+    aEvent.NatActions().SetOffered( KMceNatOfferSdp );
+    aEvent.NatActions().SdpCleanup( previous, session.Offer() );
+    
+    aEvent.NatActions().StateChangedL( aEvent, KMceNatStateDecodeOffer );
+    }