natplugins/natptraversalcontroller/src/cnatbinding.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Tue, 02 Feb 2010 01:04:58 +0200
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/*
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* Copyright (c) 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 "natfwstunbinding.h"
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#include "cnatbinding.h"
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#include "sipnattraversalrequestobserver.h"
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#include "sipnatbindingobserver.h"
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#include "cnatbindingrefresher.h"
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#include "nattraversalsocketmanager.h"
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// -----------------------------------------------------------------------------
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// CNATBinding::NewL
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// -----------------------------------------------------------------------------
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//
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CNATBinding* CNATBinding::NewL(
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    TUint32 aInitialRequestId,
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    RSocket& aSTUNSocket,
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    const TInetAddr& aLocalAddr,
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    MSIPNATTraversalRequestObserver& aInitialRequestObserver,
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    MSIPNATBindingObserver& aBindingObserver,
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    MNATTraversalSocketManager& aSocketManager)
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    {
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    CNATBinding* self =
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        CNATBinding::NewLC(aInitialRequestId,aSTUNSocket,aLocalAddr,
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                           aInitialRequestObserver,aBindingObserver,
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                           aSocketManager);
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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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// CNATBinding::NewLC
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// -----------------------------------------------------------------------------
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//
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CNATBinding* CNATBinding::NewLC(
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    TUint32 aInitialRequestId,
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    RSocket& aSTUNSocket,
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    const TInetAddr& aLocalAddr,
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    MSIPNATTraversalRequestObserver& aInitialRequestObserver,
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    MSIPNATBindingObserver& aBindingObserver,
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    MNATTraversalSocketManager& aSocketManager)
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    {
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    CNATBinding* self =
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        new(ELeave)CNATBinding(aInitialRequestId,aSTUNSocket,aLocalAddr,
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                               aInitialRequestObserver,aBindingObserver,
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                               aSocketManager);
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    CleanupStack::PushL(self);
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    return self;
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    }
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// -----------------------------------------------------------------------------
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// CNATBinding::CNATBinding
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// -----------------------------------------------------------------------------
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//
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CNATBinding::CNATBinding(
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    TUint32 aInitialRequestId,
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    RSocket& aSTUNSocket,
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    const TInetAddr& aLocalAddr,
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    MSIPNATTraversalRequestObserver& aInitialRequestObserver,
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    MSIPNATBindingObserver& aBindingObserver,
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    MNATTraversalSocketManager& aSocketManager)
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    : iInitialReqId(aInitialRequestId),
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      iSTUNSocket(aSTUNSocket),
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      iInitialReqObserver(aInitialRequestObserver),
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      iBindingObserver(aBindingObserver),
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      iSocketManager(aSocketManager),
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      iPublicAddr(aLocalAddr)
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    {
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    }
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// -----------------------------------------------------------------------------
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// CNATBinding::~CNATBinding
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// -----------------------------------------------------------------------------
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//
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CNATBinding::~CNATBinding()
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    {
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    iSocketManager.SendingCompleted(*this); // Make sure no requests are pending
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    delete iRefresher;
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    delete iBinding;
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    }
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// -----------------------------------------------------------------------------
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// CNATBinding::PersistentConnectionRequired
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// -----------------------------------------------------------------------------
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//
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TBool CNATBinding::PersistentConnectionRequired() const
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    {
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    TBool persistentConnection = EFalse;
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    if (iRefresher)
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        {
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        persistentConnection = iRefresher->PersistentConnectionRequired();
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        }
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    return persistentConnection;
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    }
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// -----------------------------------------------------------------------------
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// CNATBinding::STUNSocket
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// -----------------------------------------------------------------------------
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//
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RSocket& CNATBinding::STUNSocket()
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    {
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    return iSTUNSocket;
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    }
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// -----------------------------------------------------------------------------
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// CNATBinding::SetBinding
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// -----------------------------------------------------------------------------
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//
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void CNATBinding::SetBinding(CSTUNBinding* aBinding)
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    {
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    delete iBinding;
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    iBinding = aBinding;
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    }
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// -----------------------------------------------------------------------------
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// CNATBinding::Binding
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// -----------------------------------------------------------------------------
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//
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CSTUNBinding* CNATBinding::Binding()
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    {
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    return iBinding;
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    }
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// -----------------------------------------------------------------------------
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// CNATBinding::SendSTUNRequestL
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// -----------------------------------------------------------------------------
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//
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void CNATBinding::SendSTUNRequestL()
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    {
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    __ASSERT_ALWAYS(iBinding, User::Leave(KErrNotReady));
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    if (!iSocketManager.AddToSendingQueueL(*this))
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        {
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        iBinding->SendRequestL();
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        iIsSending = ETrue;
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        }
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    }
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// -----------------------------------------------------------------------------
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// CNATBinding::SetBindingFailed
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// -----------------------------------------------------------------------------
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//
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void CNATBinding::SetBindingFailed(TInt aError)
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    {
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    SendingCompleted();
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    delete iBinding;
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    iBinding = NULL;
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    if (iAddressResolved)
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        {
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        iAddressResolved = EFalse;
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        iBindingObserver.FlowFailure(aError);
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        }
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    else
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        {
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        iInitialReqObserver.RequestComplete(iInitialReqId,KErrNone);
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        }
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    }
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// -----------------------------------------------------------------------------
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// CNATBinding::SetPublicAddr
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// -----------------------------------------------------------------------------
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//
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TBool CNATBinding::SetPublicAddr(const TInetAddr& aPublicAddr)
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    {
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    SendingCompleted();
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    TBool removeBinding = EFalse;
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    if (iAddressResolved)
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        {
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        removeBinding = !aPublicAddr.CmpAddr(iPublicAddr);
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        }
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    else
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        {
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        iAddressResolved = ETrue;
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        TBool localAddrMatchesToPublicAddr = iPublicAddr.Match(aPublicAddr);
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        iPublicAddr = aPublicAddr;
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        if (localAddrMatchesToPublicAddr)
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            {
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            // We are not behind a NAT
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            iInitialReqObserver.RequestComplete(iInitialReqId,KErrNone);
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            }
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        else
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            {
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            iInitialReqObserver.PublicAddrResolved(iInitialReqId,aPublicAddr);
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            }
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        }
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    return removeBinding;
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    }
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// -----------------------------------------------------------------------------
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// CNATBinding::SetRefresher
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// -----------------------------------------------------------------------------
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//
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void CNATBinding::SetRefresher(CNATBindingRefresher* aRefresher)
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    {
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    delete iRefresher;
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    iRefresher = aRefresher;
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    }
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// -----------------------------------------------------------------------------
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// CNATBinding::Refresher
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// -----------------------------------------------------------------------------
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//
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CNATBindingRefresher* CNATBinding::Refresher()
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    {
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    return iRefresher;
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    }
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   221
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// -----------------------------------------------------------------------------
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// CNATBinding::InitialRequestId
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// -----------------------------------------------------------------------------
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//
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TUint32 CNATBinding::InitialRequestId() const
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    {
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    return iInitialReqId;
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    }
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// -----------------------------------------------------------------------------
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// CNATBinding::NATBindingObserver
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// -----------------------------------------------------------------------------
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//
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MSIPNATBindingObserver& CNATBinding::NATBindingObserver()
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    {
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    return iBindingObserver;
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    }
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// -----------------------------------------------------------------------------
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// CNATBinding::AddressResolved
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// -----------------------------------------------------------------------------
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//
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TBool CNATBinding::AddressResolved() const
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    {
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    return iAddressResolved;
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    }
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// -----------------------------------------------------------------------------
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// CNATBinding::PublicAddr
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// -----------------------------------------------------------------------------
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//
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const TInetAddr& CNATBinding::PublicAddr() const
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    {
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    return iPublicAddr;
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    }
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// -----------------------------------------------------------------------------
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// CNATBinding::HandleDataL
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// -----------------------------------------------------------------------------
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//
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void CNATBinding::HandleDataL(
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    const TDesC8& aData,
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    const RSocket& aSocket,
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    TBool& aConsumed)
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    {
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    aConsumed = EFalse;
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    if (iBinding &&
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        aSocket.SubSessionHandle() == iBinding->Socket().SubSessionHandle())
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        {
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        // Set a dummy remote address as the data is guaranteed not to be a
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        // TURN indication and on return the address is useless to us.
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        TInetAddr addr(KAFUnspec);
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        iBinding->HandleDataL(aData,aConsumed,addr);
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        }
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    }
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// -----------------------------------------------------------------------------
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// CNATBinding::ContinueRefreshing
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// -----------------------------------------------------------------------------
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//
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void CNATBinding::ContinueRefreshing()
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    {
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    if (iRefresher)
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        {
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        iRefresher->ContinueRefreshing();
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        }
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    }
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// -----------------------------------------------------------------------------
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// CNATBinding::NATBindingRefreshComplete
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// From MNATBindingRefresherObserver
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// -----------------------------------------------------------------------------
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//
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void CNATBinding::NATBindingRefreshComplete(TInt aCompletionCode)
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    {
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    if (aCompletionCode != KErrNone)
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        {
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        iBindingObserver.FlowFailure(aCompletionCode);
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        }
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    else
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        {
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        ContinueRefreshing();
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        }
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    }
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// -----------------------------------------------------------------------------
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// CNATBinding::Socket
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// From MNATTraversalSocketUser
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// -----------------------------------------------------------------------------
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//
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const RSocket& CNATBinding::Socket() const
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    {
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    return iSTUNSocket;
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    }
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// -----------------------------------------------------------------------------
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// CNATBinding::SendingAllowed
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// From MNATTraversalSocketUser
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// -----------------------------------------------------------------------------
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//
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void CNATBinding::SendingAllowed()
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    {
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    if (iBinding)
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        {
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        TRAPD(err, iBinding->SendRequestL());
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        if (err)
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            {
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            SetBindingFailed(err);
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            }
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        else
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            {
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            iIsSending = ETrue;
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            }
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        }
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    }
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// -----------------------------------------------------------------------------
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// CNATBinding::IsSending
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// From MNATTraversalSocketUser
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// -----------------------------------------------------------------------------
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//
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TBool CNATBinding::IsSending() const
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    {
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    return iIsSending;
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    }
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// -----------------------------------------------------------------------------
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// CNATBinding::CancelSending
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// From MNATTraversalSocketUser
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// -----------------------------------------------------------------------------
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//
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void CNATBinding::CancelSending()
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    {
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    if (iBinding)
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        {
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        iBinding->CancelRequest();
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        }
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    }
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// -----------------------------------------------------------------------------
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// CNATBinding::SendingCompleted
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// -----------------------------------------------------------------------------
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//
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void CNATBinding::SendingCompleted()
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    {
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    iIsSending = EFalse;
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    iSocketManager.SendingCompleted(*this);
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    }