author | hgs |
Fri, 23 Apr 2010 23:26:38 +0300 | |
changeset 20 | dbdc2f5f03cb |
parent 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 <ecom/ecom.h> |
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#include "natfwpluginapi.h" |
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#include "natfwcandidate.h" |
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#include "cicelocalcandidatefinder.h" |
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#include "cicesessiondata.h" |
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#include "cicecandidateprioritizer.h" |
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#include "ticenatplugincontaineriter.h" |
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#include "icecandidatehandlerlogs.h" |
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#include "cicehostresolver.h" |
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const TInt KMsToUsFactor = 1000; |
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// ======== MEMBER FUNCTIONS ======== |
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// --------------------------------------------------------------------------- |
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// CIceLocalCandidateFinder::CIceLocalCandidateFinder |
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// --------------------------------------------------------------------------- |
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// |
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CIceLocalCandidateFinder::CIceLocalCandidateFinder( |
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MIceNatPluginEventObs& aEventObserver, |
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CIceSessionData& aSessionData, |
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CIceNatPluginContainer& aPluginContainer ) |
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: |
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iEventObserver( aEventObserver ), |
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iSessionData( aSessionData ), |
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iPluginContainer( aPluginContainer ) |
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{ |
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__ICEDP( "CIceLocalCandidateFinder::CIceLocalCandidateFinder" ) |
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} |
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// --------------------------------------------------------------------------- |
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// Symbian constructor |
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// --------------------------------------------------------------------------- |
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// |
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void CIceLocalCandidateFinder::ConstructL() |
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{ |
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__ICEDP( "CIceLocalCandidateFinder::ConstructL" ) |
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iPrioritizer = CIceCandidatePrioritizer::NewL( iSessionData.Domain() ); |
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iTimer = CPeriodic::NewL( CActive::EPriorityStandard ); |
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iPluginContainer.RegObserverForEventL( *this, |
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MIceNatPluginEventObs::ELocalCandidateFound ); |
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iPluginContainer.RegObserverForEventL( *this, |
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MIceNatPluginEventObs::EFetchingCompleted ); |
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} |
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// --------------------------------------------------------------------------- |
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// Symbian constructor |
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// --------------------------------------------------------------------------- |
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// |
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CIceLocalCandidateFinder* CIceLocalCandidateFinder::NewL( |
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MIceNatPluginEventObs& aEventObserver, |
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CIceSessionData& aSessionData, |
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CIceNatPluginContainer& aPluginContainer ) |
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{ |
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__ICEDP( "CIceLocalCandidateFinder::NewL" ) |
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CIceLocalCandidateFinder* self = CIceLocalCandidateFinder::NewLC( |
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aEventObserver, aSessionData, aPluginContainer ); |
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CleanupStack::Pop( self ); |
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return self; |
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} |
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// --------------------------------------------------------------------------- |
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// Symbian constructor |
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// --------------------------------------------------------------------------- |
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// |
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CIceLocalCandidateFinder* CIceLocalCandidateFinder::NewLC( |
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MIceNatPluginEventObs& aEventObserver, |
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CIceSessionData& aSessionData, |
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CIceNatPluginContainer& aPluginContainer ) |
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{ |
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__ICEDP( "CIceLocalCandidateFinder::NewLC" ) |
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CIceLocalCandidateFinder* self = new( ELeave ) |
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CIceLocalCandidateFinder( |
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aEventObserver, aSessionData, aPluginContainer ); |
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CleanupStack::PushL( self ); |
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self->ConstructL(); |
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return self; |
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} |
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106 |
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// --------------------------------------------------------------------------- |
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// destructor |
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// --------------------------------------------------------------------------- |
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// |
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CIceLocalCandidateFinder::~CIceLocalCandidateFinder() |
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{ |
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__ICEDP( "CIceLocalCandidateFinder::~CIceLocalCandidateFinder" ) |
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115 |
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delete iPrioritizer; |
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delete iTimer; |
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iResolveRequests.Close(); |
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iResolvingCnts.Close(); |
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120 |
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iPluginContainer.UnregObserver( *this ); |
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} |
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123 |
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124 |
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// --------------------------------------------------------------------------- |
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// CIceLocalCandidateFinder::ResolveNextCandidate |
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// --------------------------------------------------------------------------- |
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// |
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TInt CIceLocalCandidateFinder::ResolveNextCandidate( TAny* aObject ) |
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{ |
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if ( aObject ) |
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{ |
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TRAP_IGNORE( |
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reinterpret_cast<CIceLocalCandidateFinder*>( aObject ) |
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->ResolveNextCandidateL() ) |
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return 1; |
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} |
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else |
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139 |
{ |
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return 0; |
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} |
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} |
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143 |
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144 |
|
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// --------------------------------------------------------------------------- |
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// CIceLocalCandidateFinder::FetchCandidatesL |
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// --------------------------------------------------------------------------- |
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// |
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void CIceLocalCandidateFinder::FetchCandidatesL( |
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TUint aStreamCollectionId, TUint aStreamId, TUint aComponentId, |
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TUint aAddrFamily, TBool aIPv6After ) |
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{ |
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__ICEDP( "CIceLocalCandidateFinder::FetchCandidatesL" ) |
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154 |
|
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TInt numOfRequests = iPluginContainer.Count(); |
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TCounter counter( aStreamId, numOfRequests ); |
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__ASSERT_ALWAYS( KErrNotFound == iResolvingCnts.Find( |
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counter, TCounter::MatchStreamId ), |
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User::Leave( KErrAlreadyExists ) ); |
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iResolvingCnts.AppendL( counter ); |
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161 |
|
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// form requests |
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TIceNatPluginContainerIter iterator |
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= TIceNatPluginContainerIter( iPluginContainer ); |
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while ( !iterator.IsDone() ) |
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{ |
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CNATFWPluginApi* item = iterator++; |
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168 |
|
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ScheduleResolveRequestL( *item, aStreamCollectionId, aStreamId, |
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aComponentId, aAddrFamily, aIPv6After ); |
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} |
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} |
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173 |
|
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174 |
|
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// --------------------------------------------------------------------------- |
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// From class MIceNatPluginEventObs. |
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// CIceLocalCandidateFinder::PluginEventOccured |
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// --------------------------------------------------------------------------- |
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// |
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void CIceLocalCandidateFinder::PluginEventOccured( |
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const CNATFWPluginApi* aPlugin, TUint aStreamId, |
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MIceNatPluginEventObs::TNatPluginEvent aEventCode, |
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TInt aErrorCode, TAny* aEventData, TUint aStreamConnectionId, |
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TUint aComponentId, TBool aIPv6After ) |
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{ |
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__ICEDP( "CIceLocalCandidateFinder::PluginEventOccured" ) |
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187 |
|
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switch ( aEventCode ) |
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{ |
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case MIceNatPluginEventObs::ELocalCandidateFound: |
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{ |
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if ( aEventData && NULL != aPlugin ) |
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{ |
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CNATFWCandidate* candidate |
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= reinterpret_cast<CNATFWCandidate*>( aEventData ); |
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NewLocalCandidateFound( *aPlugin, *candidate ); |
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} |
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else |
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199 |
{ |
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__ICEDP( "CIceLocalCandidateFinder::PluginEventOccured, ELSE" ) |
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ASSERT( EFalse ); |
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} |
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} |
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break; |
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205 |
|
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case MIceNatPluginEventObs::EFetchingCompleted: |
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{ |
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if ( KErrNone == aErrorCode ) |
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{ |
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iSucceeded = ETrue; |
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} |
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|
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// At least one candidate must success |
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// otherwise pass error code upwards. |
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if ( ResolvingCompleted( aStreamId, aStreamConnectionId, |
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aComponentId, aIPv6After ) ) |
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{ |
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iSucceeded ? aErrorCode = KErrNone : aErrorCode = KErrNotFound; |
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iSucceeded = EFalse; |
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|
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iEventObserver.PluginEventOccured( NULL, aStreamId, |
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aEventCode, aErrorCode, aEventData, aStreamConnectionId, |
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aComponentId, aIPv6After ); |
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} |
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} |
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break; |
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|
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default: |
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__ICEDP( "CIceLocalCandidateFinder::PluginEventOccured, DEFAULT" ) |
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ASSERT( EFalse ); |
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} |
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} |
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|
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|
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// --------------------------------------------------------------------------- |
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// CIceLocalCandidateFinder::ScheduleResolveRequestL |
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// --------------------------------------------------------------------------- |
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// |
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void CIceLocalCandidateFinder::ScheduleResolveRequestL( |
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const CNATFWPluginApi& aPlugin, |
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TUint aCollectionId, TUint aStreamId, TUint aComponentId, |
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TUint aAddrFamily, TBool aIPv6After ) |
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{ |
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__ICEDP( "CIceLocalCandidateFinder::ScheduleResolveRequestL" ) |
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|
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TResolveRequest request( aPlugin, |
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aCollectionId, aStreamId, aComponentId, |
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TResolveRequest::ERequestNotIssued, aAddrFamily, aIPv6After ); |
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iResolveRequests.AppendL( request ); |
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250 |
|
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if ( !iTimer->IsActive() ) |
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{ |
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TCallBack callBack( |
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CIceLocalCandidateFinder::ResolveNextCandidate, this ); |
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iTimer->Start( |
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0, iSessionData.TaTimerValue() * KMsToUsFactor, callBack ); |
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} |
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} |
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|
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|
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// --------------------------------------------------------------------------- |
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// CIceLocalCandidateFinder::ResolveNextCandidateL |
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// --------------------------------------------------------------------------- |
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// |
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void CIceLocalCandidateFinder::ResolveNextCandidateL() |
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{ |
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TResolveRequest searchItem( TResolveRequest::ERequestNotIssued ); |
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TInt reqIndex = iResolveRequests.Find( |
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searchItem, TResolveRequest::MatchState ); |
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|
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if ( KErrNotFound != reqIndex ) |
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{ |
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__ICEDP( "CIceLocalCandidateFinder::ResolveNextCandidateL" ) |
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|
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TResolveRequest& request( iResolveRequests[reqIndex] ); |
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request.SetState( TResolveRequest::ERequestOngoing ); |
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|
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CNATFWPluginApi* plugin |
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= const_cast<CNATFWPluginApi*>( request.Plugin() ); |
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ASSERT( NULL != plugin ); |
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|
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TInt error( KErrNone ); |
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if ( KNatPluginIdNokiaHost() == plugin->PluginIdentifier() ) |
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{ |
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// Create connection with desired address family |
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TUint addrFamily( request.AddrFamily() ); |
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TRAP( error, plugin->FetchCandidateL( request.StreamId(), |
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RetransmissionTimeOut(), addrFamily ) ); |
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if ( KErrNone != error ) |
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{ |
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PluginEventOccured( plugin, request.StreamId(), |
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MIceNatPluginEventObs::EFetchingCompleted, error, NULL ); |
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} |
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else |
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{ |
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CIceHostResolver* host |
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= reinterpret_cast<CIceHostResolver*>( plugin ); |
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iLocalAddr = host->LocalAddress( |
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request.StreamId(), addrFamily ); |
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ASSERT( !iLocalAddr.IsUnspecified() ); |
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} |
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} |
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else |
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{ |
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TRAP( error, plugin->FetchCandidateL( request.StreamId(), |
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RetransmissionTimeOut(), iLocalAddr ) ); |
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if ( KErrNone != error ) |
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{ |
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PluginEventOccured( plugin, request.StreamId(), |
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MIceNatPluginEventObs::EFetchingCompleted, error, NULL ); |
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} |
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} |
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} |
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else |
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{ |
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__ICEDP( "CIceLocalCandidateFinder::ResolveNextCandidateL, READY" ) |
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|
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iTimer->Cancel(); |
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} |
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} |
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321 |
|
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322 |
|
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// --------------------------------------------------------------------------- |
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// CIceLocalCandidateFinder::NewLocalCandidateFound |
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// --------------------------------------------------------------------------- |
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// |
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void CIceLocalCandidateFinder::NewLocalCandidateFound( |
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const CNATFWPluginApi& aPlugin, |
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CNATFWCandidate& aLocalCandidate ) |
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330 |
{ |
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__ICEDP("CIceLocalCandidateFinder::NewLocalCandidateFound") |
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332 |
|
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TResolveRequest searchItem( aPlugin, aLocalCandidate.StreamId(), |
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TResolveRequest::ERequestOngoing ); |
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TInt index( iResolveRequests.Find( |
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searchItem, TResolveRequest::MatchStreamStatePlugin ) ); |
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337 |
|
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if ( KErrNotFound != index ) |
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{ |
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aLocalCandidate.SetStreamCollectionId( |
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iResolveRequests[index].CollectionId() ); |
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aLocalCandidate.SetComponentId( |
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iResolveRequests[index].ComponentId() ); |
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|
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TRAP_IGNORE( iPrioritizer->PrioritizeL( aLocalCandidate ) ) |
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} |
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else |
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348 |
{ |
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ASSERT( EFalse ); |
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} |
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351 |
|
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TBool redundantCandidate( EFalse ); |
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TInt error( KErrNone ); |
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TRAP( error, redundantCandidate |
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= iSessionData.AddLocalCandidateL( &aLocalCandidate ) ) |
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356 |
|
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if ( ( !redundantCandidate ) && ( KErrNone == error ) ) |
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{ |
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iEventObserver.PluginEventOccured( |
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NULL, |
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aLocalCandidate.StreamId(), |
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MIceNatPluginEventObs::ELocalCandidateFound, |
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KErrNone, |
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CNATFWCandidate::NewL( aLocalCandidate ) ); |
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} |
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} |
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367 |
|
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368 |
|
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// --------------------------------------------------------------------------- |
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// CIceLocalCandidateFinder::ResolvingCompleted |
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// --------------------------------------------------------------------------- |
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// |
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TBool CIceLocalCandidateFinder::ResolvingCompleted( TUint aStreamId, |
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TUint& aStreamCollectionId, TUint& aComponentId, TBool& aIPv6After ) |
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{ |
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__ICEDP( "CIceLocalCandidateFinder::ResolvingCompleted" ) |
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|
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TCounter counter( aStreamId ); |
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TInt streamInd = iResolvingCnts.Find( counter, TCounter::MatchStreamId ); |
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ASSERT( KErrNotFound != streamInd ); |
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381 |
|
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--iResolvingCnts[streamInd]; |
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383 |
|
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TBool completed( iResolvingCnts[streamInd] == 0 ); |
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if ( completed ) |
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386 |
{ |
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iResolvingCnts.Remove( streamInd ); |
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388 |
|
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TResolveRequest request( aStreamId ); |
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TInt reqIndex = iResolveRequests.Find( request, |
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TResolveRequest::MatchStreamId ); |
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392 |
|
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while ( KErrNotFound != reqIndex ) |
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394 |
{ |
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aIPv6After = iResolveRequests[reqIndex].IPv6After(); |
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if ( aIPv6After ) |
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397 |
{ |
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aStreamCollectionId |
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= iResolveRequests[reqIndex].CollectionId(); |
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aComponentId = iResolveRequests[reqIndex].ComponentId(); |
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401 |
} |
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402 |
|
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403 |
iResolveRequests.Remove( reqIndex ); |
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reqIndex = iResolveRequests.Find( request, |
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TResolveRequest::MatchStreamId ); |
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} |
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407 |
} |
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408 |
|
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return completed; |
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} |
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411 |
|
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412 |
|
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413 |
// --------------------------------------------------------------------------- |
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// CIceLocalCandidateFinder::RetransmissionTimeOut |
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// Calculates RTO while being in gathering phase as specified in ICE-17, 16. |
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// RTO = MAX (100ms, Ta * (number of pairs)), where the number of pairs |
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// refers to the number of pairs of candidates with STUN or TURN servers. |
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// --------------------------------------------------------------------------- |
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// |
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TUint CIceLocalCandidateFinder::RetransmissionTimeOut() const |
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421 |
{ |
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// resolving requests for host plugin excluded in formula |
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TInt numOfHostRequests( 0 ); |
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424 |
|
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TInt numOfRequests( iResolveRequests.Count() ); |
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for ( TInt i = 0; i < numOfRequests; i++ ) |
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427 |
{ |
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if ( KNatPluginIdNokiaHost() == |
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iResolveRequests[i].Plugin()->PluginIdentifier() ) |
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430 |
{ |
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numOfHostRequests++; |
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} |
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} |
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434 |
|
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TInt numOfPairs = iResolveRequests.Count() - numOfHostRequests; |
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numOfPairs >= 0 ? numOfPairs = numOfPairs : numOfPairs = 0; |
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437 |
|
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const TInt KMinimumRto( 100 ); |
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return TUint( Max( KMinimumRto, |
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iSessionData.TaTimerValue() * numOfPairs ) ); |
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} |