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/*
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* Copyright (c) 2010 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: class for searching BT devices
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*
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*/
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#include "basicdevdiscoverer.h"
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#include <btservices/devdiscoveryobserver.h>
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#include "btserviceutilconsts.h"
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// ----------------------------------------------------------
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// CBasicDevDiscoverer::CBasicDevDiscoverer
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// ----------------------------------------------------------
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//
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CBasicDevDiscoverer::CBasicDevDiscoverer( MDevDiscoveryObserver& aObserver )
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: iObserver( aObserver )
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{
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}
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// ----------------------------------------------------------
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// CBasicDevDiscoverer::ConstructL
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// ----------------------------------------------------------
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//
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void CBasicDevDiscoverer::ConstructL()
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{
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User::LeaveIfError( iSocketServer.Connect() );
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iActive = CBtSimpleActive::NewL( *this, BtServiceUtil::EBluetoothInquiry );
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}
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// ----------------------------------------------------------
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// CBasicDevDiscoverer::NewL
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// ----------------------------------------------------------
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//
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CBasicDevDiscoverer* CBasicDevDiscoverer::NewL( MDevDiscoveryObserver& aObserver )
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{
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CBasicDevDiscoverer* self = new (ELeave)
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CBasicDevDiscoverer( aObserver );
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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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// CBasicDevDiscoverer::
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// ----------------------------------------------------------
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//
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CBasicDevDiscoverer::~CBasicDevDiscoverer()
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{
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delete iActive;
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Reset();
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iSocketServer.Close();
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iDevices.Close();
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}
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// ----------------------------------------------------------
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// CBasicDevDiscoverer::SetObserver
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// ----------------------------------------------------------
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//
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void CBasicDevDiscoverer::SetObserver( MDevDiscoveryObserver& aObserver )
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{
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iObserver = aObserver;
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}
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// ----------------------------------------------------------
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// CBasicDevDiscoverer::
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// ----------------------------------------------------------
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//
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void CBasicDevDiscoverer::Cancel()
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{
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iActive->Cancel();
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iHostResolver.Close();
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iDevices.ResetAndDestroy();
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}
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// ----------------------------------------------------------
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// CBasicDevDiscoverer::
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// ----------------------------------------------------------
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//
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void CBasicDevDiscoverer::DiscoverDeviceL(TBTMajorDeviceClass aDeviceClass )
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{
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// This class supports only one request at the time:
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if ( iActive->IsActive() )
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{
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User::Leave( KErrInUse );
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}
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Reset();
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iMajorDeviceClassFilter = aDeviceClass;
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_LIT( KLinkMgrDes, "BTLinkManager" );
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// Associate with bluetooth Link Manager.
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TProtocolName protocol( KLinkMgrDes );
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TProtocolDesc pInfo;
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User::LeaveIfError( iSocketServer.FindProtocol( protocol, pInfo));
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User::LeaveIfError( iHostResolver.Open(iSocketServer,
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pInfo.iAddrFamily, pInfo.iProtocol));
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iActive->SetRequestId( BtServiceUtil::EBluetoothInquiry );
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iInquirySockAddr.SetAction( KHostResInquiry + KHostResEir + KHostResIgnoreCache );
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// We always do Generic Inquiry.
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// Limited Inquiry could be added here in future on business need.
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iInquirySockAddr.SetIAC(KGIAC);
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iHostResolver.GetByAddress( iInquirySockAddr, iEntry, iActive->RequestStatus() );
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iActive->GoActive();
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}
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// ----------------------------------------------------------
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// CBasicDevDiscoverer::RequestCompletedL
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// Inform caller for received device and issue next EIR/Name request
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// if the request was successful.
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// ----------------------------------------------------------
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//
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void CBasicDevDiscoverer::RequestCompletedL( CBtSimpleActive* aActive, TInt aStatus )
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{
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TInt errToObserver( aStatus );
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// position in array iDevices: the device item the observer will be notified of.
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TInt devToNotify ( KErrNotFound );
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if ( aActive->RequestId() == BtServiceUtil::EBluetoothInquiry )
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{
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if ( aStatus == KErrNone )
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{
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TInt pos = HandleInquiryResultL();
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// continue to inquiry for more devices in range
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iHostResolver.Next( iEntry, iActive->RequestStatus() );
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iActive->GoActive();
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if ( pos > KErrNotFound && iDevices[pos]->iName.Length() > 0 )
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{
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devToNotify = pos;
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}
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}
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else if( iDevices.Count() > 0 )
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{
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// an error from inquiry operation.
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// we move to next step to get device names if some devices have been
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// found but without a name.
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iPagingNamePos = iDevices.Count() - 1;
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aActive->SetRequestId( BtServiceUtil::EBluetoothPageDeviceName );
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PageNextDeviceName();
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}
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}
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else if ( aActive->RequestId() == BtServiceUtil::EBluetoothPageDeviceName )
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{
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errToObserver = KErrNone;
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devToNotify = iPagingNamePos;
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// the name in iEntry was reset before paging operation, so we
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// can rely on this length() at this time:
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if ( aStatus == KErrNone && iEntry().iName.Length() > 0 )
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{
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iDevices[iPagingNamePos]->iName = iEntry().iName;
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}
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// the return error is not checked here. We continue to page the rest
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// device names.
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--iPagingNamePos;
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PageNextDeviceName();
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}
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// request ID is BtServiceUtil::EAsyncNotifyDeviceSearchCompleted
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else
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{
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iObserver.HandleDiscoveryCompleted( errToObserver );
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return;
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}
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// AO not active means that this is neither inquiring nor paging name.
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// Schedule an operation completion callback:
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if ( !iActive->IsActive() &&
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aActive->RequestId() != BtServiceUtil::EAsyncNotifyDeviceSearchCompleted )
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{
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// We inform the client of operation completion asynchronously, so that
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// we will not end up with problems, e.g., invalid memory,
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// if the client issues more request in the callback context.
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aActive->SetRequestId( BtServiceUtil::EAsyncNotifyDeviceSearchCompleted );
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aActive->RequestStatus() = KRequestPending;
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TRequestStatus* sta = &aActive->RequestStatus();
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User::RequestComplete( sta, errToObserver );
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aActive->GoActive();
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}
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// This could be possible in both inquiry and paging operations.
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if ( devToNotify > KErrNotFound )
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{
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// This device record is not used any more after we have informed client.
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// Extract it and push to cleanup for detroy.
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// This is to prevent peak memory usage in case of a great number of
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// devices being in range.
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CDeviceSearchRecord* rec = iDevices[devToNotify];
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iDevices.Remove( devToNotify );
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CleanupStack::PushL( rec );
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iObserver.HandleNextDiscoveryResultL( rec->iAddr, rec->iName );
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CleanupStack::PopAndDestroy( rec );
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}
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}
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// ----------------------------------------------------------
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// CBasicDevDiscoverer::DoCancelRequest
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// ----------------------------------------------------------
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//
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void CBasicDevDiscoverer::CancelRequest( TInt aId )
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{
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// host resolver needs to be cancelled.
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// For request BtServiceUtil::EAsyncNotifyDeviceSearchCompleted, we
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// are doing self-completing. Thus, nothing is needed now.
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if ( aId == BtServiceUtil::EBluetoothInquiry ||
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aId == BtServiceUtil::EBluetoothPageDeviceName )
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{
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iHostResolver.Cancel();
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}
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}
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// ----------------------------------------------------------
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// CBasicDevDiscoverer::HandleError
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// Inform UI from error occured.
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// ----------------------------------------------------------
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//
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void CBasicDevDiscoverer::HandleError( CBtSimpleActive* aActive, TInt aError )
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{
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// We might have issued an request to Host Resolver in RequestCompleted().
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// Cancel AO just in case:
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aActive->Cancel();
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Reset();
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// We cannot proceed more. Inform client:
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iObserver.HandleDiscoveryCompleted( aError );
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}
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// ----------------------------------------------------------
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// CBasicDevDiscoverer::
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// ----------------------------------------------------------
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//
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void CBasicDevDiscoverer::PageNextDeviceName()
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{
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// reset the name in entry so that previous result will
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// not propogate if the next paging operation fails.
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iEntry().iName.Zero();
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for (; iPagingNamePos > -1; --iPagingNamePos )
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{
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// Get the next in-range device that has no device name yet
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// This is practically meaning that the device would be
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// < v2.1
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if( iDevices[iPagingNamePos]->iName.Length() == 0 )
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{
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iInquirySockAddr.SetAction( KHostResName + KHostResIgnoreCache );
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TBTDevAddr btaddr = iDevices[iPagingNamePos]->iAddr.BTAddr();
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iInquirySockAddr.SetBTAddr( iDevices[iPagingNamePos]->iAddr.BTAddr() );
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iInquirySockAddr.SetIAC(KGIAC);
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iHostResolver.GetByAddress( iInquirySockAddr, iEntry, iActive->RequestStatus() );
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iActive->GoActive();
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break;
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}
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}
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}
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// ----------------------------------------------------------
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// CBasicDevDiscoverer::HandleInquiryResultL
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// Inform of properties of the found BTdevice,
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// which passes the search filter. Its name would be retrived
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// later if not contained by the first round of inquiry.
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// ----------------------------------------------------------
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//
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TInt CBasicDevDiscoverer::HandleInquiryResultL()
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{
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TInquirySockAddr& sa = TInquirySockAddr::Cast( iEntry().iAddr );
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// parse the inquiry result if this device passes the filters:
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if ( iMajorDeviceClassFilter == EMajorDeviceMisc
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|| sa.MajorClassOfDevice() == iMajorDeviceClassFilter )
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{
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CDeviceSearchRecord* record = NewInstanceL( sa );
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CleanupStack::PushL( record );
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iDevices.InsertL(record, 0 );
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CleanupStack::Pop( record );
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TBTDeviceName devName;
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TBluetoothNameRecordWrapper eir( iEntry() );
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TInt length = eir.GetDeviceNameLength();
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TBool isComplete( EFalse );
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if( length > 0 )
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{
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User::LeaveIfError( eir.GetDeviceName( record->iName, isComplete) );
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}
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return 0;
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}
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return KErrNotFound;
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}
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// ----------------------------------------------------------
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// CBasicDevDiscoverer::CompleteDiscovery
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// ----------------------------------------------------------
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//
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CDeviceSearchRecord* CBasicDevDiscoverer::NewInstanceL(
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const TInquirySockAddr& aAddr, const TDesC& aName )
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{
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CDeviceSearchRecord* record = new (ELeave) CDeviceSearchRecord();
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record->iAddr = aAddr;
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record->iName = aName;
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return record;
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}
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// ----------------------------------------------------------
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// CBasicDevDiscoverer::Reset
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// ----------------------------------------------------------
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//
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void CBasicDevDiscoverer::Reset()
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{
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// Free the cache of host Resolver.
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iHostResolver.Close();
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// Clean previous in-range devices whose proximity status
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// may have been changed.
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iDevices.ResetAndDestroy();
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}
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// End of File
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