bluetoothengine/bteng/src/btengincpair.cpp
author Pat Downey <patd@symbian.org>
Wed, 01 Sep 2010 12:20:04 +0100
branchRCL_3
changeset 23 9386f31cc85b
permissions -rw-r--r--
Revert incorrect RCL_3 drop: Revision: 201033 Kit: 201035
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/*
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* Copyright (c) 2009 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:  BT determines pairing status 
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*
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*/
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#include "btengincpair.h"
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#include "btengpairman.h"
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#include "btengotgpair.h"
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#include "btengconstants.h"
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#include "debug.h"
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const TInt KBTEngWaitingForPairingOkDelay = 500000; // 0.5s
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enum TPairingStageId
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    {
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    /**
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     * is monitoring physical link status
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     */
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    EPhysicalLinkNotify = EDevicePairUserNotification + 1,
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    EWaitingForPairingOk,
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    };
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// ======== MEMBER FUNCTIONS ========
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// ---------------------------------------------------------------------------
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// C++ default constructor
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// ---------------------------------------------------------------------------
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//
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CBTEngIncPair::CBTEngIncPair( CBTEngPairMan& aParent, 
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    const TBTDevAddr& aAddr) : CBTEngPairBase( aParent, aAddr )
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    {
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    }
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// ---------------------------------------------------------------------------
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// 2nd phase constructor
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// ---------------------------------------------------------------------------
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//
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void CBTEngIncPair::ConstructL()
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    {
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    BaseConstructL();
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    iActivePairingOk = CBTEngActive::NewL(*this, EWaitingForPairingOk, CActive::EPriorityStandard);
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    User::LeaveIfError( iPairingOkTimer.CreateLocal() );
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    }
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// ---------------------------------------------------------------------------
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// NewL
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// ---------------------------------------------------------------------------
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//
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CBTEngIncPair* CBTEngIncPair::NewL( CBTEngPairMan& aParent, 
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    const TBTDevAddr& aAddr)
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    {
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    CBTEngIncPair* self = new (ELeave) CBTEngIncPair(aParent, aAddr);
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    CleanupStack::PushL( self );
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    self->ConstructL();
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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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// Destructor
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// ---------------------------------------------------------------------------
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//
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CBTEngIncPair::~CBTEngIncPair()
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    {
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    TRACE_FUNC_ENTRY
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    // Cancel all outstanding requests
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    CancelPlaNotification();
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    iPla.Close();
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    iPairingOkTimer.Cancel();
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    iPairingOkTimer.Close();
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    if(iActivePairingOk)
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        {
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        iActivePairingOk->CancelRequest();
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        delete iActivePairingOk;
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        }
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    TRACE_FUNC_EXIT
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    }
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// ---------------------------------------------------------------------------
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// Accept this message only if the specified device is the same as this is
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// dealing with.
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// ---------------------------------------------------------------------------
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//
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TInt CBTEngIncPair::ObserveIncomingPair( const TBTDevAddr& aAddr )
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    {
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    TInt err( KErrServerBusy );
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    if ( iAddr == aAddr )
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        {
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        err = KErrNone;
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        iUserAwarePairing = ETrue; // This function is called by a notifier, which means the UI has been involved
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        // Therefore we can display it in the paired devices list
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        if ( !iActive->IsActive() && !OpenPhysicalLinkAdaptor() )
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            {
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            // If we are observing physical link, or showing user a note,
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            // we won't interrupt it.
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            UnSetPairResult();
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            MonitorPhysicalLink();
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            }
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        }
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    return err;
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    }
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// ---------------------------------------------------------------------------
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// Assign the responsibility of outgoing pair handling to CBTEngOtgPair
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// ---------------------------------------------------------------------------
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//
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void CBTEngIncPair::HandleOutgoingPairL( const TBTDevAddr& aAddr, TUint aCod )
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    {
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    TRACE_FUNC_ENTRY
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    // Outgoing pairing always takes highest priority:
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    CBTEngPairBase* pairer = CBTEngOtgPair::NewL( iParent, aAddr );
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    pairer->HandleOutgoingPairL( aAddr, aCod );
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    iParent.RenewPairer( pairer );
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    TRACE_FUNC_EXIT
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    }
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// ---------------------------------------------------------------------------
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// Accept this message only if the specified device is the same as this is
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// dealing with.
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// ---------------------------------------------------------------------------
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//
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void CBTEngIncPair::StopPairHandling( const TBTDevAddr& aAddr )
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    {
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    if ( aAddr == iAddr )
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        {
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        TRACE_FUNC_ENTRY
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        iParent.RenewPairer( NULL );
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        TRACE_FUNC_EXIT
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        }
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    }
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// ---------------------------------------------------------------------------
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// Notify user if pairing failed.
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// ---------------------------------------------------------------------------
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//
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void CBTEngIncPair::DoHandlePairServerResult( TInt aResult )
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    {
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    CancelPlaNotification();
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    // For a successful pairing, we need wait for registry table change.
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    if( aResult != KErrNone && aResult != KHCIErrorBase )
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        {
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        // Pair failure situation.
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        SetPairResult( aResult );
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        ShowPairingNoteAndAuthorizeQuery();
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        }
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    }
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   159
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// ---------------------------------------------------------------------------
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// Kill this if the linkkey type indicates OBEX authentication.
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// Otherwise notify user the pair result.
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// ---------------------------------------------------------------------------
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//
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   165
void CBTEngIncPair::DoHandleRegistryNewPairedEvent( const TBTNamelessDevice& aDev )
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    {
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    TRACE_FUNC_ENTRY
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   168
    
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    // First of all cancel the iPairingOkTimer timer, if active
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    if (iActivePairingOk->IsActive())
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        {
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        iPairingOkTimer.Cancel();
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   173
        iActivePairingOk->CancelRequest();
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        UnSetPairResult();  // we might have set it before (if the link went down) so we want to reset it.   
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   175
        }
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    if (aDev.LinkKeyType() == ELinkKeyUnauthenticatedNonUpgradable && !iUserAwarePairing)
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		{
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		// If an application uses btengconnman API to connect a service of 
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		// this device and JW pairing occurred as part of security enforcement,
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		// it shall be a user aware pairing, and we shall add this device in paired
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		// view. In this way, user is able to disconnect the device from our UI.
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		// Otherwise the link key has been created by a device without IO requesting 
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		// a service connection with phone. We won't take any action (e.g. remove 
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		// link key) in this case. As the result, this device can't be seen in our UI, 
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   185
		// however other applications are still freely to use its services.
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		TRACE_INFO(_L("[BTEng]: CBTEngIncPair: JW pairing with no IO device" ) )
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		TBTEngConnectionStatus status = iParent.IsDeviceConnected( aDev.Address() );
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		if ( status == EBTEngConnecting || status == EBTEngConnected )
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   189
			{
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			// the return error is ingore as we can not have other proper 
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   191
			// exception handling option:
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			(void) iParent.AddUiCookieJustWorksPaired( aDev );
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   193
			}
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		iParent.RenewPairer( NULL );
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   195
		}
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    else if (aDev.LinkKeyType() == ELinkKeyUnauthenticatedUpgradable && !iUserAwarePairing)
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   197
		{
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   198
		// The linkkey has been created  by an incoming OBEX service request
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   199
		// which resulted a pairing event received from pair server.
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		TRACE_INFO(_L("[BTEng]: CBTEngIncPair: JW pairing with IO device" ) )
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   201
		iParent.RenewPairer( NULL );
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   202
		}
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   203
    else
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   204
		{
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		if (aDev.LinkKeyType() == ELinkKeyUnauthenticatedNonUpgradable || aDev.LinkKeyType() == ELinkKeyUnauthenticatedUpgradable)
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   206
			{
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   207
			// The user was involved in the pairing, so display in the paired devices list
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			(void) iParent.AddUiCookieJustWorksPaired(aDev);
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   209
			}
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		TRACE_INFO(_L("[BTEng]: CBTEngIncPair: Non-JW pairing"))
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   211
		// Other pairing model than Just Works:
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   212
		CancelPlaNotification();
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   213
		SetPairResult( KErrNone );
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		ShowPairingNoteAndAuthorizeQuery();
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   215
		}
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   216
    TRACE_FUNC_EXIT
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   217
    }
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   218
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   219
// ---------------------------------------------------------------------------
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// From class MBTEngActiveObserver.
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   221
// ---------------------------------------------------------------------------
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   222
//
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   223
void CBTEngIncPair::RequestCompletedL( CBTEngActive* /*aActive*/, TInt aId, TInt aStatus )
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   224
    {
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   225
    TRACE_FUNC_ARG( ( _L( "aId: %d, aStatus: %d"), aId, aStatus ) )
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   226
        // Check which request completed.
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   227
    switch( aId )
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   228
        {
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   229
        case EPhysicalLinkNotify:
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   230
            {
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   231
                // Check if the link has disconnected.
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   232
            HandlePhysicalLinkResultL( aStatus );
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   233
            break;
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diff changeset
   234
            }
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   235
        case EDevicePairUserNotification:
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   236
            {
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   237
                // the user has been informed of the result, kill this:
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   238
            TRACE_INFO(_L("[BTENG]:CBTEngIncPair authorization notifier completed") )
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   239
            iParent.RenewPairer( NULL );
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   240
            break;
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diff changeset
   241
            }
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   242
        case EWaitingForPairingOk:
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   243
            {
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   244
            // pairing failed, inform user:
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   245
            if (iPairResult == KErrNone)
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   246
                {
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   247
                // iPairResult must have been set as an error. if it's not it means somewhere else
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   248
                // it has been reset. But we need to have it set to an error as we are notifying 
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   249
                // the "unable to pair" message.
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   250
                SetPairResult(KErrGeneral);
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diff changeset
   251
                }
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   252
            ShowPairingNoteAndAuthorizeQuery();
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   253
            break;
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diff changeset
   254
            }    
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   255
        default:
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   256
                // Should not be possible, but no need for handling.
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   257
            TRACE_INFO( (_L("[BTEng]: CBTEngIncPair::RequestCompletedL unhandled event!!") ) )
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   258
            break;
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diff changeset
   259
        }
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   260
    TRACE_FUNC_EXIT
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   261
    }
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   262
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   263
// ---------------------------------------------------------------------------
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   264
// From class MBTEngActiveObserver.
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   265
// Handles a leave in RequestCompleted by simply self-destructing.
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   266
// ---------------------------------------------------------------------------
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   267
//
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   268
void CBTEngIncPair::HandleError( CBTEngActive* aActive, TInt aId, TInt aError )
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   269
    {
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   270
    TRACE_FUNC_ARG( ( _L( "request id: %d, error: %d" ), aId, aError ) )
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   271
    (void) aActive;
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   272
    (void) aId;
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   273
    (void) aError;
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   274
        // Our error handling is to just stop observing. 
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   275
        // Nothing critical to be preserved herer, the user 
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   276
        // just won't get any notification of pairing result.
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   277
    iParent.RenewPairer( NULL );
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   278
    }
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   279
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   280
// ---------------------------------------------------------------------------
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   281
// Subscribe to physical link notifications. 
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   282
// physical link must exist when calling this function.
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// ---------------------------------------------------------------------------
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//
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void CBTEngIncPair::MonitorPhysicalLink()
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    {
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    TRACE_FUNC_ENTRY
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    iActive->SetRequestId( EPhysicalLinkNotify );
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        // Subscribe to disconnect and error events.
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    iPla.NotifyNextBasebandChangeEvent( iBbEvent, 
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                            iActive->RequestStatus(), 
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                            ENotifyPhysicalLinkDown | ENotifyPhysicalLinkError );
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    iActive->GoActive();
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    TRACE_FUNC_EXIT
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    }
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// ---------------------------------------------------------------------------
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// Opens the adaptor if physical link exists.
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// ---------------------------------------------------------------------------
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//
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TInt CBTEngIncPair::OpenPhysicalLinkAdaptor()
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    {
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    TRACE_FUNC_ENTRY
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    TInt err ( KErrNone );
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    if( !iPla.IsOpen() )
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        {
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            // Try to open the adapter in case it failed earlier.
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            // This can happen for outgoing dedicated bonding with 
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            // non-SSP device, as the PIN dialog can be kept open even 
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            // though the link has dropped because of a time-out.
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        err = iPla.Open( iParent.SocketServ(), iAddr );
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        }
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    TRACE_INFO( (_L("[BTEng]: CBTEngIncPair::HasPhysicalLink ? %d"), iPla.IsOpen() ) )
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    return err;
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    }
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// ---------------------------------------------------------------------------
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// Cancel outstanding physical link notification
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// ---------------------------------------------------------------------------
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//
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void CBTEngIncPair::CancelPlaNotification()
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    {
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    TRACE_FUNC_ENTRY
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    if( iActive && iActive->IsActive() && 
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            iActive->RequestId() == EPhysicalLinkNotify )
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        {
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        // cancel Baseband monitor
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        iPla.CancelNextBasebandChangeEventNotifier();
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        iActive->Cancel();
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        }
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    TRACE_FUNC_EXIT
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    }
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// ---------------------------------------------------------------------------
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// Handle a physical link event. Notify pair failed if physical link is down.
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// ---------------------------------------------------------------------------
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//
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void CBTEngIncPair::HandlePhysicalLinkResultL( TInt aResult )
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    {
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    TRACE_FUNC_ARG( ( _L( " BBEvent 0x%08X, code %d"), 
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                            iBbEvent().EventType(), iBbEvent().SymbianErrorCode() ) )
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        // Check if the connection is still alive.
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    TBool physicalLinkDown = 
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        ( iBbEvent().EventType() == ENotifyPhysicalLinkDown | ENotifyPhysicalLinkError );
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    if( aResult || physicalLinkDown )
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        {
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        // link went down. It might be because of pairing failed or the remote device disconnected the
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        // physical link after a successful pairing.
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        // we wait for 0.5 secs before notifying the "unable to pair" message as, if the pair is 
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        // successful, we manage it to show the right confirmation message.
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        SetPairResult( (aResult == 0) ? KErrGeneral : aResult );
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        iPairingOkTimer.After(iActivePairingOk->iStatus, KBTEngWaitingForPairingOkDelay);
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        iActivePairingOk->GoActive();
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        }
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    else
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        {
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        // Uninteresting event, re-subscribe.
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        MonitorPhysicalLink();
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        }
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    TRACE_FUNC_EXIT
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    }