--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/natfw/natfwicecandidatehandler/src/cicecandidateprioritizer.cpp	Tue Feb 02 01:04:58 2010 +0200
@@ -0,0 +1,185 @@
+/*
+* Copyright (c) 2006-2007 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:    Handles priorization of local candidates
+*
+*/
+
+
+
+
+#include <e32base.h>
+#include "natfwcandidate.h"
+#include <cnatfwsettingsapi.h>
+#include <mnatfwicesettings.h>
+#include "cicecandidateprioritizer.h"
+#include "icecandidatehandlerlogs.h"
+
+const TUint KLocalPrefSingleHomedUdp    = 65535;
+
+/**  powers of 2 */
+const TUint K2ToPowerOf24   = 2^24;
+const TUint K2ToPowerOf12   = 2^12;
+const TUint K2ToPowerOf9    = 2^9;
+const TUint K2ToPowerOf8    = 2^8;
+const TUint K2ToPowerOf0    = 2^0;
+
+/**  max component Id */
+const TUint KMaxComponentId             = 256;
+
+// ======== MEMBER FUNCTIONS ========
+
+CIceCandidatePrioritizer::CIceCandidatePrioritizer()
+    {
+    __ICEDP( "CIceCandidatePrioritizer::CIceCandidatePrioritizer" )
+    }
+
+
+void CIceCandidatePrioritizer::ConstructL( const TDesC8& aDomain )
+    {
+    iNatSettings = CNATFWNatSettingsApi::NewL( aDomain );
+    
+    }
+
+
+CIceCandidatePrioritizer* CIceCandidatePrioritizer::NewL( 
+        const TDesC8& aDomain )
+    {
+    __ICEDP( "CIceCandidatePrioritizer::NewL" )
+
+    CIceCandidatePrioritizer* self 
+        = CIceCandidatePrioritizer::NewLC( aDomain );
+    CleanupStack::Pop( self );
+
+    return self;
+    }
+
+
+CIceCandidatePrioritizer* CIceCandidatePrioritizer::NewLC( 
+        const TDesC8& aDomain )
+    {
+    __ICEDP( "CIceCandidatePrioritizer::NewLC" )
+
+    CIceCandidatePrioritizer* self = new( ELeave ) CIceCandidatePrioritizer();
+    CleanupStack::PushL( self );
+    
+    self->ConstructL( aDomain );
+    
+    return self;
+    }
+
+
+CIceCandidatePrioritizer::~CIceCandidatePrioritizer()
+    {
+    __ICEDP( "CIceCandidatePrioritizer::~CIceCandidatePrioritizer" )
+    
+    delete iNatSettings;
+    }
+
+
+// ---------------------------------------------------------------------------
+// prioritize candidate
+// ---------------------------------------------------------------------------
+//
+void CIceCandidatePrioritizer::PrioritizeL( CNATFWCandidate& aCandidate ) const
+    {
+    __ICEDP( "CIceCandidatePrioritizer::PrioritizeL" )
+    
+    TInt type_preference( 0 );
+    TInt direction_pref( 0 );
+    const MNATFWIceSettings& settings = iNatSettings->IceSettingsL();
+    
+    switch( aCandidate.Type() )
+        {
+// UDP candidate types
+        case CNATFWCandidate::EHost:
+            {
+            settings.GetPrefValue( MNATFWIceSettings::EPrefHostCandidate, 
+                type_preference );
+            break;
+            }        
+        case CNATFWCandidate::EServerReflexive:
+            {
+            settings.GetPrefValue( 
+                MNATFWIceSettings::EPrefServerReflexiveCandidate, 
+                type_preference );
+            break;
+            }
+        case CNATFWCandidate::EPeerReflexive:
+            {
+            settings.GetPrefValue( 
+                MNATFWIceSettings::EPrefPeerReflexiveCandidate,
+                type_preference  );
+            
+            // safety check for invalid provisioning
+            if ( MNATFWIceSettings::KPrefValueDisabled == type_preference )
+                {
+                type_preference = 0;
+                }
+            break;
+            }
+        case CNATFWCandidate::ERelay:
+            {
+            settings.GetPrefValue( MNATFWIceSettings::EPrefRelayCandidate,
+                type_preference );
+            break;
+            }
+            
+        default:
+            {
+            __ICEDP( "CIceCandidatePrioritizer::Prioritize, DEFAULT" )
+            ASSERT( EFalse );
+            break;
+            }
+        }
+    
+    ASSERT( MNATFWIceSettings::KPrefValueDisabled != type_preference );
+    ASSERT( MNATFWIceSettings::KPrefValueDisabled != direction_pref );
+    
+    TInt transport_pref( 0 );
+    switch( aCandidate.TransportProtocol() )
+        {
+        case KProtocolInetUdp:
+            settings.GetPrefValue( MNATFWIceSettings::EPrefUdpTransport,
+                transport_pref );
+            break;
+        
+        case KProtocolInetTcp:
+            settings.GetPrefValue( MNATFWIceSettings::EPrefTcpTransport,
+                transport_pref );
+            break;
+        
+        default:
+            __ICEDP( "CIceCandidatePrioritizer::Prioritize, DEFAULT" )
+            ASSERT( EFalse );
+            break;
+        }
+    
+    ASSERT( MNATFWIceSettings::KPrefValueDisabled != transport_pref );
+    
+    TUint local_preference = KLocalPrefSingleHomedUdp;
+    if ( KProtocolInetTcp == aCandidate.TransportProtocol() )
+        {
+        TUint other_pref = 0;
+        local_preference = K2ToPowerOf12 * transport_pref + \
+                           K2ToPowerOf9  * direction_pref + \
+                           K2ToPowerOf0  * other_pref;
+        }
+    
+    TUint component_ID = aCandidate.ComponentId();
+    TUint priority = K2ToPowerOf24 * type_preference + \
+                     K2ToPowerOf8  * local_preference + \
+                     K2ToPowerOf0  * ( KMaxComponentId - component_ID );
+    
+    aCandidate.SetPriority( priority );
+    }