author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Tue, 02 Feb 2010 01:04:58 +0200 | |
changeset 0 | 1bce908db942 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2006-2007 Nokia Corporation and/or its subsidiary(-ies). |
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* All rights reserved. |
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* This component and the accompanying materials are made available |
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* under the terms of "Eclipse Public License v1.0" |
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* which accompanies this distribution, and is available |
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* at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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* |
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* Initial Contributors: |
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* Nokia Corporation - initial contribution. |
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* |
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* Contributors: |
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* |
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* Description: |
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* |
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*/ |
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#include "natfwcandidate.h" |
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#include "natfwcandidatepair.h" |
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#include "cicecheckprioritizer.h" |
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#include "ciceconnectivitycheck.h" |
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#include "icecandidatehandlerlogs.h" |
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/** variables used in priority calculation */ |
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const TUint64 K2ToPowerOf32 = 2^32; |
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const TUint64 KNumValTwo = 2; |
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// ======== MEMBER FUNCTIONS ======== |
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CIceCheckPrioritizer::CIceCheckPrioritizer() |
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{ |
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__ICEDP( "CIceCheckPrioritizer::CIceCheckPrioritizer" ) |
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} |
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CIceCheckPrioritizer* CIceCheckPrioritizer::NewL() |
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{ |
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__ICEDP( "CIceCheckPrioritizer::NewL" ) |
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CIceCheckPrioritizer* self = CIceCheckPrioritizer::NewLC(); |
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CleanupStack::Pop( self ); |
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return self; |
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} |
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CIceCheckPrioritizer* CIceCheckPrioritizer::NewLC() |
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{ |
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__ICEDP( "CIceCheckPrioritizer::NewLC" ) |
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CIceCheckPrioritizer* self = new( ELeave ) CIceCheckPrioritizer(); |
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CleanupStack::PushL( self ); |
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return self; |
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} |
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CIceCheckPrioritizer::~CIceCheckPrioritizer() |
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{ |
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__ICEDP( "CIceCheckPrioritizer::~CIceCheckPrioritizer" ) |
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} |
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// --------------------------------------------------------------------------- |
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// CIceCheckPrioritizer::PrioritizePair |
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// --------------------------------------------------------------------------- |
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// |
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void CIceCheckPrioritizer::PrioritizePair( CNATFWCandidatePair& aPair, |
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TNATFWIceRole aCurrentRole ) const |
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{ |
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__ICEDP( "CIceCheckPrioritizer::PrioritizePair" ) |
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/* |
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ICE-17, section 5.7.2. |
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Let G be the priority for the candidate provided by the controlling |
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agent. Let D be the priority for the candidate provided by the |
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controlled agent. The priority for a pair is computed as: |
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pair priority = 2^32*MIN(G,D) + 2*MAX(G,D) + (G>D?1:0) |
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Where G>D?1:0 is an expression whose value is 1 if G is greater than |
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D, and 0 otherwise. This formula ensures a unique priority for each |
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pair. |
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*/ |
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TUint64 controllingPri( 0 ); |
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TUint64 controlledPri( 0 ); |
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if ( EIceRoleControlling == aCurrentRole ) |
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{ |
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controllingPri = aPair.LocalCandidate().Priority(); |
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controlledPri = aPair.RemoteCandidate().Priority(); |
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} |
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else |
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{ |
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controlledPri = aPair.LocalCandidate().Priority(); |
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controllingPri = aPair.RemoteCandidate().Priority(); |
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} |
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TUint64 pairPri = K2ToPowerOf32 * Min( controllingPri, controlledPri ) |
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+ KNumValTwo * Max( controllingPri, controlledPri ) |
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+ ( |
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( controllingPri > controlledPri ) ? TUint64( 1 ) : TUint64( 0 ) |
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); |
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aPair.SetPriority( pairPri ); |
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} |
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// --------------------------------------------------------------------------- |
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// CIceCheckPrioritizer::PrioritizePairs |
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// --------------------------------------------------------------------------- |
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// |
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void CIceCheckPrioritizer::PrioritizePairs( |
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RPointerArray<CNATFWCandidatePair>& aPairs, |
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TNATFWIceRole aCurrentRole ) const |
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{ |
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__ICEDP( "CIceCheckPrioritizer::PrioritizePairs" ) |
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|
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TInt ind( aPairs.Count() ); |
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while ( ind-- ) |
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{ |
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PrioritizePair( *aPairs[ind], aCurrentRole ); |
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} |
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} |
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// --------------------------------------------------------------------------- |
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// CIceCheckPrioritizer::PrioritizeCheck |
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// --------------------------------------------------------------------------- |
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// |
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void CIceCheckPrioritizer::PrioritizeCheck( |
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CIceConnectivityCheck& aCheck, TNATFWIceRole aCurrentRole ) const |
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{ |
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__ICEDP( "CIceCheckPrioritizer::PrioritizeCheck" ) |
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|
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PrioritizePair( |
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const_cast<CNATFWCandidatePair&>( aCheck.CandidatePair() ), |
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aCurrentRole ); |
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} |
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// --------------------------------------------------------------------------- |
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// CIceCheckPrioritizer::PrioritizeChecks |
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// --------------------------------------------------------------------------- |
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// |
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void CIceCheckPrioritizer::PrioritizeChecks( |
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RPointerArray<CIceConnectivityCheck>& aChecks, |
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TNATFWIceRole aCurrentRole ) const |
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{ |
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__ICEDP( "CIceCheckPrioritizer::PrioritizeChecks" ) |
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TInt ind( aChecks.Count() ); |
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while ( ind-- ) |
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{ |
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PrioritizeCheck( *aChecks[ind], aCurrentRole ); |
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} |
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} |