bluetoothengine/bteng/src/btengsrvbbconnectionmgr.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Mon, 18 Jan 2010 20:28:57 +0200
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permissions -rw-r--r--
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/*
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* Copyright (c) 2006 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:  Helper class for handling Bluetooth Baseband-related 
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*                connection management.
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*
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*/
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#include <wlaninternalpskeys.h>
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#include <featmgr.h>
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#include "btengsrvbbconnectionmgr.h"
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#include "debug.h"
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/**  ?description */
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const TInt KBTEngSrvBBConnId = 11;
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/**  ?description */
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const TInt KBTEngSrvWlanStatusId = 12;
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/**  ?description */
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const TInt KBTEngMaxAddrArraySize = 10;
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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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CBTEngSrvBBConnMgr::CBTEngSrvBBConnMgr(RSocketServ& aSockServ)
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    : iSockServ(aSockServ)
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    {
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    }
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// ---------------------------------------------------------------------------
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// Symbian 2nd-phase constructor
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// ---------------------------------------------------------------------------
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//
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void CBTEngSrvBBConnMgr::ConstructL()
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    {
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    iLinkCountWatcher = CBTEngActive::NewL( *this, KBTEngSrvBBConnId, 
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                                             CActive::EPriorityStandard );
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        // Subscribe to the BT Baseband link count.
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    User::LeaveIfError( iLinkCountProperty.Attach( KPropertyUidBluetoothCategory, 
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                                                KPropertyKeyBluetoothGetPHYCount ) );
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    // Check if we need to monitor WLAN
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    FeatureManager::InitializeLibL();
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    iWlanSupported = FeatureManager::FeatureSupported( KFeatureIdProtocolWlan );
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    FeatureManager::UnInitializeLib();
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    if( iWlanSupported )
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        {
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        iWlanWatcher = CBTEngActive::NewL( *this, KBTEngSrvWlanStatusId, 
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                                                  CActive::EPriorityStandard );
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        User::LeaveIfError( iWlanStatusProperty.Attach( KPSUidWlan, 
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                                                         KPSWlanIndicator ) );
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        }
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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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CBTEngSrvBBConnMgr* CBTEngSrvBBConnMgr::NewL(RSocketServ& aSockServ)
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    {
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    CBTEngSrvBBConnMgr* self = new( ELeave ) CBTEngSrvBBConnMgr(aSockServ);
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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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CBTEngSrvBBConnMgr::~CBTEngSrvBBConnMgr()
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    {
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    Unsubscribe();
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	iLinkCountProperty.Close();
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    iWlanStatusProperty.Close();
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	delete iLinkCountWatcher;
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	delete iWlanWatcher;
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	delete iPhyLinks;
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    }
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// ---------------------------------------------------------------------------
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// Start listening to the relevant properties.
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// ---------------------------------------------------------------------------
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//
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void CBTEngSrvBBConnMgr::Subscribe()
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    {
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    if( !iLinkCountWatcher->IsActive() )
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        {
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        iLinkCountProperty.Subscribe( iLinkCountWatcher->RequestStatus() );
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        iLinkCountWatcher->GoActive();
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        }
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    if( iWlanSupported && !iWlanWatcher->IsActive() )
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        {
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        iWlanStatusProperty.Subscribe( iWlanWatcher->RequestStatus() );
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        iWlanWatcher->GoActive();
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        }
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    }
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// ---------------------------------------------------------------------------
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// Stop listening to the subscribed properties.
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// ---------------------------------------------------------------------------
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//
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void CBTEngSrvBBConnMgr::Unsubscribe()
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    {
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    if( iLinkCountWatcher->IsActive() )
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        {
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        iLinkCountProperty.Cancel();
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        iLinkCountWatcher->CancelRequest();
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        }
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	if( iWlanWatcher && iWlanWatcher->IsActive() )
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	    {
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	    iWlanStatusProperty.Cancel();
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	    iWlanWatcher->CancelRequest();
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	    }
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    }
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// ---------------------------------------------------------------------------
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// ?implementation_description
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// ---------------------------------------------------------------------------
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//
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TInt CBTEngSrvBBConnMgr::ManageTopology( TBool aPrepDiscovery )
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    {
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    TInt linkCount = 0;
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    TBool closeSock = ETrue;    // To check if we can close the handle again.
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    TInt err = iLinkCountProperty.Get( linkCount );
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    if( !err && !linkCount && iAutoSwitchOff )
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        {
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            // Inform server that there are no active connections anymore.
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        iAutoSwitchOff = EFalse;
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        iCallBack.CallBack();
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        }
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    RBTDevAddrArray addrArray;
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    TInt minLinks = 1;  // We don't care about our role if we have only one link.
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    if( aPrepDiscovery || GetWlanStatus() )
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        {
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            // If we are performing discovery shortly, or we have an active WLAN 
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            // connection, then request master role on all links.
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        minLinks = 0;
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        }
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    if( !err && linkCount > minLinks )
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        {
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        if( iPhyLinks )
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            {
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                // If we have an open handle with the socket server (because we
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                // are disconnecting all links), then don't close the socket.
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            closeSock = EFalse;
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            }
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            // There are existing links; get the addresses.
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        TRAP( err, GetConnectedAddressesL( addrArray ) );
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        }
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    if( !err && addrArray.Count() > minLinks )
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        {
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            // Try to become master on all the links.
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        RBTPhysicalLinkAdapter btLink;
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        for( TInt i = 0; i < addrArray.Count(); i++ )
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            {
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                // At this point, the results of the operations do not matter 
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                // too much. If an error is returned, then that only affects 
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                // further operations on the same link, and they should not be 
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                // passed back to the caller.
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            TUint32 basebandState = 0;
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            err = btLink.Open( iSockServ, addrArray[ i ] );
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            if( !err )
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                {
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                    // Mostly for logging purposes, check the current role (the 
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                    // request will anyway be ignored if we're already master).
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                err = btLink.PhysicalLinkState( basebandState );
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                TRACE_INFO( ( 
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                    _L( "[BTEng]\t ManageTopology: Current role: %d; status: %d" ), 
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                    (TInt) ( basebandState & ENotifyAnyRole ), err ) )
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                }
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            if( !err && ( basebandState & ENotifySlave ) )
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   195
                {
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                    // Try to become master of this link. This request could 
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                    // be issued without checking the current role, and would 
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                    // just be ignored if we are already master. The return 
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                    // value is also ignored later on, at this stage it is 
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                    // not important if the call succeeds.
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                err = btLink.RequestMasterRole();
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                TRACE_INFO( ( 
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                    _L( "[BTEng]\t Requesting master role; result: %d" ),  err ) )
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                }
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                // Reset the result, so that it is not passed up 
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                // (in case this was the last one in the loop).
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            err = KErrNone;
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            btLink.Close();
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   209
            }
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        }
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    addrArray.Close();
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   212
    if( closeSock )
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        {
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        delete iPhyLinks;
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        iPhyLinks = NULL;
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        }
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    return err;
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    }
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// ---------------------------------------------------------------------------
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// Gets an array of addresses of remote devices for all Baseband connections.
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// ---------------------------------------------------------------------------
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//
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void CBTEngSrvBBConnMgr::GetConnectedAddressesL( RBTDevAddrArray& aAddrArray )
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    {
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    TInt err = KErrNone;
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    if( !iPhyLinks )
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   229
        {
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        iPhyLinks = CBluetoothPhysicalLinks::NewL( *this, iSockServ );
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        }
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    if( !err )
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        {
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        err = iPhyLinks->Enumerate( aAddrArray, KBTEngMaxAddrArraySize );
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        }
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    User::LeaveIfError( err );
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    }
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// ---------------------------------------------------------------------------
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// Request to disconnect all Bluetooth baseband connections.
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// ---------------------------------------------------------------------------
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//
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void CBTEngSrvBBConnMgr::DisconnectAllLinksL( TCallBack& aCallBack )
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    {
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    TRACE_FUNC_ENTRY
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    iCallBack = aCallBack;
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    RBTDevAddrArray addrArray;
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    GetConnectedAddressesL( addrArray );
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    TInt err = KErrNone;
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    if( addrArray.Count() > 0 )
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        {
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        err = iPhyLinks->DisconnectAll();
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        }
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    else
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        {
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        err = KErrNotFound;
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        }
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    addrArray.Close();
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    if( err && err != KErrInUse )
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        {
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            // No connections, or something went wrong; just clean up 
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            // and inform our client.
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        HandleDisconnectAllCompleteL( err );
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        }
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    TRACE_FUNC_EXIT
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    }
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// ---------------------------------------------------------------------------
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// Request to disconnect all Bluetooth baseband connections.
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// ---------------------------------------------------------------------------
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//
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void CBTEngSrvBBConnMgr::SetAutoSwitchOff( TBool aEnable, TCallBack& aCallBack )
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    {
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    iAutoSwitchOff = aEnable;
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	iCallBack = aCallBack;
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    if( aEnable )
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        {
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        TInt linkCount = 0;
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        TInt err = iLinkCountProperty.Get( linkCount );
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        if( !err && !linkCount )
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            {
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            iCallBack.CallBack();
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            }
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        }
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    }
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// ---------------------------------------------------------------------------
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// From class MBluetoothPhysicalLinksNotifier.
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// ?implementation_description
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// ---------------------------------------------------------------------------
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//
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void CBTEngSrvBBConnMgr::HandleCreateConnectionCompleteL( TInt aErr )
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    {
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    (void) aErr;
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    }
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// ---------------------------------------------------------------------------
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// From class MBluetoothPhysicalLinksNotifier.
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// ?implementation_description
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// ---------------------------------------------------------------------------
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//
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void CBTEngSrvBBConnMgr::HandleDisconnectCompleteL( TInt aErr )
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    {
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    (void) aErr;
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    }
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// ---------------------------------------------------------------------------
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// From class MBluetoothPhysicalLinksNotifier.
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// ?implementation_description
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// ---------------------------------------------------------------------------
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//
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void CBTEngSrvBBConnMgr::HandleDisconnectAllCompleteL( TInt aErr )
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    {
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    TRACE_FUNC_ARG( ( _L( "error: %d" ), aErr ) )
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    delete iPhyLinks;
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    iPhyLinks = NULL;
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    iCallBack.CallBack();  // Inform our client.
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    (void) aErr;    // There is no way to pass the error code; 
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                    // anyway our client is not interested..
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    }
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// ---------------------------------------------------------------------------
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// From class MBTEngActiveObserver.
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// ?implementation_description
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// ---------------------------------------------------------------------------
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//
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void CBTEngSrvBBConnMgr::RequestCompletedL( CBTEngActive* aActive, TInt aId, 
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    TInt aStatus )
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    {
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    TRACE_FUNC_ARG( ( _L( "id: %d; status: %d" ), aId, aStatus ) )
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    ASSERT( aId == KBTEngSrvBBConnId || aId == KBTEngSrvWlanStatusId );
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    (void) aActive;
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    (void) aId;
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    if( aStatus != KErrPermissionDenied )
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        {
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            // Ignore any other errors.
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   343
            // First subscribe again, so that we don't miss any updates.
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            Subscribe();
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        }
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   346
    (void) ManageTopology( EFalse );    // Ignore result; nothing to do 
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   347
                                        // about it here.
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    TRACE_FUNC_EXIT
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    }
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   351
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// ---------------------------------------------------------------------------
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// From class MBTEngActiveObserver.
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// Handles an error in RunL( i.e. RequestCompletedL). Does nothing, since our
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// RunL cannot actually leave.
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// ---------------------------------------------------------------------------
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//
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void CBTEngSrvBBConnMgr::HandleError( CBTEngActive* aActive, TInt aId, 
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    TInt aError )
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    {
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    TRACE_FUNC_ARG( ( _L( "id: %d; status: %d" ), aId, aError ) )
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    (void) aActive;
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    (void) aId;
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    (void) aError;
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    }
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// ---------------------------------------------------------------------------
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// ?implementation_description
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// ---------------------------------------------------------------------------
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//
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TBool CBTEngSrvBBConnMgr::GetWlanStatus()
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    {
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    TInt wlanStatus = 0;
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    TBool connected = EFalse;
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    if( iWlanSupported )
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        {
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        TInt err = iWlanStatusProperty.Get( wlanStatus );
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        if( err )
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            {
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            wlanStatus = 0; // Reset just to be sure.
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            }
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        }
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    if( wlanStatus == EPSWlanIndicatorActive || 
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        wlanStatus == EPSWlanIndicatorActiveSecure )
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        {
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        connected = ETrue;
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        }
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    return connected;
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    }