--- /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 );
+ }