mtpfws/mtpfw/src/cmtpconnectionmgr.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Fri, 19 Feb 2010 23:40:44 +0200
branchRCL_3
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permissions -rw-r--r--
Revision: 201003 Kit: 201007
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// Copyright (c) 2006-2009 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:
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//
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#include "cmtpconnectionmgr.h"
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#include "cmtpconnection.h"
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#include "cmtptransportplugin.h"
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#include "mmtptransportconnection.h"
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// Class constants.
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__FLOG_STMT(_LIT8(KComponent,"ConnectionMgr");)
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/**
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CMTPConnectionMgr factory method.
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@leave If a failure occurs, one of the system wide error codes.
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*/
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CMTPConnectionMgr* CMTPConnectionMgr::NewL()
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    {
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    CMTPConnectionMgr* self = new(ELeave) CMTPConnectionMgr();
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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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CMTPConnectionMgr::~CMTPConnectionMgr()
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    {
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    StopTransport( iTransportUid, ETrue );
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    iConnections.ResetAndDestroy();
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    iSuspendedTransports.Reset();
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    iSuspendedTransports.Close();
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    delete iTransportTrigger;
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    __FLOG_CLOSE;
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    }
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/**
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Provides a reference to the connection with the specified connection identifier.
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@param aConnectionId The connection identifier.
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@return The connection reference.
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@leave KErrNotFound If a connection with the specified identifier does not 
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exist.
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*/
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EXPORT_C CMTPConnection& CMTPConnectionMgr::ConnectionL(TUint aConnectionId) const
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    {   
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    __FLOG(_L8("ConnectionL - Entry"));
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    TInt idx(ConnectionFind(aConnectionId));
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    __FLOG_VA((_L8("idx is %d "), idx));
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    __ASSERT_ALWAYS((idx != KErrNotFound), User::Invariant());
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    __FLOG(_L8("ConnectionL - Exit"));
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    return *iConnections[idx];
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    }
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/**
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Provides a count of the number of currently open connections.
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@return The count of currently open connections.
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*/  
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TUint CMTPConnectionMgr::ConnectionCount() const
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    {
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    return iConnections.Count();
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    }
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/**
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Provide a non-const reference to the located at the specified position within 
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the connection table.
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@return A non-const reference to the required connection.
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*/
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CMTPConnection& CMTPConnectionMgr::operator[](TInt aIndex) const
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    {
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    return *iConnections[aIndex];
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    }
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/**
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Returns the current transportID.
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@return The CMTPTransportPlugin interface implementation UID.
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*/
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EXPORT_C TUid CMTPConnectionMgr::TransportUid()
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    {
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    return iTransportUid;
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    }
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6
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void CMTPConnectionMgr::ConnectionCloseComplete(const TUint& /*aConnUid*/)
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    {
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    if (iIsTransportStopping)
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        {
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        iIsTransportStopping = EFalse;
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        ResumeSuspendedTransport();
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        }
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    }
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0
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EXPORT_C void CMTPConnectionMgr::StartTransportL(TUid aTransport)
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    {
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    StartTransportL( aTransport, NULL );
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    }
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/**
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Loads and starts up the MTP transport plug-in with the specified 
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CMTPTransportPlugin interface implementation UID. Only one MTP transport 
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plug-in can be loaded at any given time.
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@param The CMTPTransportPlugin interface implementation UID.
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@leave KErrNotSupported If an attempt is made to load a second MTP transport
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plug-in.
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@leave One of the system wide error codes, if a processing failure occurs.
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@see StopTransport
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*/
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EXPORT_C void CMTPConnectionMgr::StartTransportL(TUid aTransport, const TAny* aParameter)
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    {
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	__FLOG(_L8("StartTransportL - Entry"));
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    if (iTransport)
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        {
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        if (aTransport != iTransportUid)
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            {
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            // Multiple transports not currently supported.
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            User::Leave(KErrNotSupported);
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            }
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        }
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    else
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        {
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        iTransport = CMTPTransportPlugin::NewL(aTransport, aParameter);
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        TRAPD(err, iTransport->StartL(*this));
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		if (err != KErrNone)
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			{
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			__FLOG_VA( ( _L8("StartTransportL error, error code = %d"), err) );
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			delete iTransport;
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			iTransport = NULL;
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			User::Leave(err);
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			}
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        iTransportUid = aTransport;       
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        iTransportCount++;
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        UnsuspendTransport( iTransportUid );
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        }
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	__FLOG(_L8("StartTransportL - Exit"));
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    }
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/**
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Queue the transport to start when there is no running transport
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@param aTransport, The CMTPTransportPlugin interface implementation UID.
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@param aParameter, reserved
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@leave One of the system wide error codes, if the operation fails.
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*/
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EXPORT_C void CMTPConnectionMgr::QueueTransportL( TUid aTransport, const TAny* /*aParameter*/ )
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    {
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    __FLOG_VA( ( _L8("+QueueTransportL( 0x%08X )"), aTransport.iUid ) );
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    __ASSERT_DEBUG( ( KErrNotFound == iSuspendedTransports.Find( aTransport ) ), User::Invariant() );
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    iSuspendedTransports.InsertL( aTransport, 0 );
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    __FLOG( _L8("-QueueTransportL") );
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    }
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EXPORT_C void CMTPConnectionMgr::SetClientSId(TUid aSecureId)
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	{
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	iSecureId=aSecureId;
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	}
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/**
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Shuts down and unloads the MTP transport plug-in with the specified 
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CMTPTransportPlugin interface implementation UID.
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@param The CMTPTransportPlugin interface implementation UID.
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*/
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EXPORT_C void CMTPConnectionMgr::StopTransport(TUid aTransport)
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    {
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    StopTransport( aTransport, EFalse );
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    }
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/**
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Shuts down and unloads the MTP transport plug-in with the specified 
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CMTPTransportPlugin interface implementation UID.
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@param aTransport The CMTPTransportPlugin interface implementation UID.
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@param aByBearer If ETrue, it means the transport plugin is stopped because the bearer is turned off or not activated.
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*/
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EXPORT_C void CMTPConnectionMgr::StopTransport( TUid aTransport, TBool aByBearer )
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    {
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	__FLOG(_L8("StopTransport - Entry"));
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   192
	
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    if ( ( iTransport ) && ( aTransport == iTransportUid ) )
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        {
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        if ( !aByBearer )
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            {
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            TRAP_IGNORE( SuspendTransportL( aTransport ) );
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            }
6
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        iIsTransportStopping = ETrue;
0
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        iTransport->Stop(*this);
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        delete iTransport;
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        iTransport = NULL;
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        iTransportUid = KNullUid;
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        iTransportCount--;
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        }
6
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0
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    if ( aByBearer )
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        {
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        UnsuspendTransport( aTransport );
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        }
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   211
		
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	__FLOG(_L8("StopTransport - Exit"));
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    }
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   214
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   215
/**
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Shuts down and unloads all active MTP transport plug-ins.
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*/
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EXPORT_C void CMTPConnectionMgr::StopTransports()
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    {
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    if (iTransport)
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        {
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        iTransport->Stop(*this);
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        delete iTransport;
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        iTransport = NULL;
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        iTransportUid = KNullUid;
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        iTransportCount--;
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        }
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    }
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/**
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Returns the number of active Transports.
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@return Number of active transports
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*/
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EXPORT_C TInt CMTPConnectionMgr::TransportCount() const
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    {
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	return iTransportCount;
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    }
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6
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TBool CMTPConnectionMgr::ConnectionClosed(MMTPTransportConnection& aTransportConnection)
0
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    {
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    __FLOG(_L8("ConnectionClosed - Entry"));
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    TInt idx(ConnectionFind(aTransportConnection.BoundProtocolLayer().ConnectionId()));
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    __FLOG_VA((_L8("idx is %d "), idx));
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    __ASSERT_DEBUG((idx != KErrNotFound), User::Invariant());
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    CMTPConnection* connection(iConnections[idx]);
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    __FLOG(_L8("ConnectionClosed - Exit"));
6
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    return connection->ConnectionSuspended();
0
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    }
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void CMTPConnectionMgr::ConnectionOpenedL(MMTPTransportConnection& aTransportConnection)
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    {   
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    __FLOG(_L8("ConnectionOpenedL - Entry"));
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    TUint impUid = aTransportConnection.GetImplementationUid();
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    TInt idx = ConnectionFind(impUid);
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    CMTPConnection* connection = NULL;
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    if (idx == KErrNotFound)
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        {
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        // take transport connection implementation UID as connection ID
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        connection = CMTPConnection::NewLC(impUid, aTransportConnection);
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        iConnections.InsertInOrder(connection, iConnectionOrder);
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        CleanupStack::Pop(connection); 
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        }
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    else
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        {
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        connection = iConnections[idx];
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        }
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    connection->ConnectionResumedL(aTransportConnection);
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    __FLOG(_L8("ConnectionOpenedL - Exit"));
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    }
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EXPORT_C TUid CMTPConnectionMgr::ClientSId()
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	{
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	return iSecureId;
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	}
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/**
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Constructor.
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*/
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CMTPConnectionMgr::CMTPConnectionMgr() :
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    iConnectionOrder(ConnectionOrderCompare),
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    iShutdownConnectionIdx(KErrNotFound),
6
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	iTransportUid(KNullUid),
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	iIsTransportStopping(EFalse)
0
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    {
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    __FLOG_OPEN(KMTPSubsystem, KComponent);    
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    }
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/**
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Provides the connections table index of the connection with the specified 
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connection identifier.
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@param The identifier of the required connection.
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@return The connection table index of the required connection, or KErrNotFound
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if the connection identifier could not be found.
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*/ 
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TInt CMTPConnectionMgr::ConnectionFind(TUint aConnectionId) const
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    {
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    __FLOG_VA((_L8("ConnectionFind - Entry with connectionId %d "), aConnectionId));
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    TInt ret(KErrNotFound);
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    const TUint noConnections = iConnections.Count();
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    for (TUint i(0); ((i < noConnections) && (ret == KErrNotFound)); i++)
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        {
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        TInt id(iConnections[i]->ConnectionId());
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        if (aConnectionId == id)
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            {
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            ret = i;
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            break;
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            }
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        }
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    __FLOG(_L8("ConnectionFind - Exit"));    
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    return ret;
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    }
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/**
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Determines the relative order of two CMTPConnection objects based on their 
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connection IDs.
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@return Zero, if the two objects are equal; a negative value, if the aFirst 
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is less than aSecond, or; a positive value, if the aFirst is greater than 
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aSecond.
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*/
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TInt CMTPConnectionMgr::ConnectionOrderCompare(const CMTPConnection& aFirst, const CMTPConnection& aSecond)
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    {
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    return aFirst.ConnectionId() - aSecond.ConnectionId();
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   329
    }
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   330
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   331
/**
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Append the transport to the suspended transport list
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   333
@param aTransport, The implementation UID of the suspended transport plugin
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@leave One of the system wide error codes, if the operation fails.
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*/
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void CMTPConnectionMgr::SuspendTransportL( TUid aTransport )
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   337
    {
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    __FLOG_1( _L8("+SuspendTransportL( 0x%08X )"), aTransport );
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    if ( KErrNotFound == iSuspendedTransports.Find( aTransport ) )
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        {
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   341
        iSuspendedTransports.AppendL( aTransport );
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   342
        }
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   343
    __FLOG( _L8("-SuspendTransportL") );
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   344
    }
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   345
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   346
/**
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   347
Remove transport from the suspended transports list
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   348
@param aTransport, The CMTPTransportPlugin interface implementation UID 
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   349
*/
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   350
void CMTPConnectionMgr::UnsuspendTransport( TUid aTransport )
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   351
    {
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   352
    __FLOG_1( _L8("+UnsuspendTransport( 0x%08X )"), aTransport.iUid );
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   353
    TInt idx = iSuspendedTransports.Find( aTransport );
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   354
    if ( KErrNotFound != idx )
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   355
        {
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   356
        __FLOG_1( _L8("Remove the number %d suspended transport"), idx );
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   357
        iSuspendedTransports.Remove( idx );
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   358
        }
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   359
    __FLOG( _L8("-UnsuspendTransport") );
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   360
    }
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   361
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   362
/**
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   363
Prepare to resume suspended transport
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   364
*/
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   365
void CMTPConnectionMgr::ResumeSuspendedTransport()
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   366
    {
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   367
    __FLOG( _L8("+ResumeSuspendedTransport") );
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   368
    const TInt count = iSuspendedTransports.Count();
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   369
    if ( ( count > 0 )
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   370
        // If the transport was just switched and suspended, it shouldn't be resumed.
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   371
        && ( iTransportUid != iSuspendedTransports[count-1] ) )
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   372
        {
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   373
        __FLOG( _L8("Found suspended transport(s).") );
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   374
        if ( !iTransportTrigger )
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   375
            {
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   376
            iTransportTrigger = new( ELeave ) CAsyncCallBack( CActive::EPriorityStandard );
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   377
            }
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   378
        __ASSERT_DEBUG( ( !iTransportTrigger->IsActive() ), User::Invariant() );
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   379
        TCallBack callback( CMTPConnectionMgr::DoResumeSuspendedTransport, this );
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   380
        iTransportTrigger->Set( callback );
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   381
        iTransportTrigger->CallBack();
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   382
        }
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parents:
diff changeset
   383
    __FLOG( _L8("-ResumeSuspendedTransport") );
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   384
    }
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   385
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diff changeset
   386
/**
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diff changeset
   387
Resume suspended transport
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   388
@param aSelf, The memory address of the CMTPConnectionMgr instance
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   389
@return KErrNone, but the value is ignored.
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diff changeset
   390
*/
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diff changeset
   391
TInt CMTPConnectionMgr::DoResumeSuspendedTransport( TAny* aSelf )
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diff changeset
   392
    {
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   393
    CMTPConnectionMgr* self = reinterpret_cast< CMTPConnectionMgr* >( aSelf );
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diff changeset
   394
    __ASSERT_DEBUG( ( self->iSuspendedTransports.Count() > 0 ), User::Invariant() );
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   395
    TRAP_IGNORE( self->StartTransportL( self->iSuspendedTransports[self->iSuspendedTransports.Count()-1] ) );
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   396
    return KErrNone;
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diff changeset
   397
    }
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parents:
diff changeset
   398