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/*
* LogoffEventFilter.cpp - implementation of LogoffEventFilter class
*
* Copyright (c) 2018-2019 Tobias Junghans <tobydox@veyon.io>
*
* This file is part of Veyon - http://veyon.io
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public
* License along with this program (see COPYING); if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*
*/
#include <QCoreApplication>
#include "LogoffEventFilter.h"
LogoffEventFilter::LogoffEventFilter() :
m_shutdownEventHandle( OpenEvent( EVENT_ALL_ACCESS, false, "Global\\SessionEventUltra" ) )
{
if( m_shutdownEventHandle == nullptr )
{
// no global event available already as we're not running under the
// control of the veyon service supervisor?
if( GetLastError() == ERROR_FILE_NOT_FOUND )
{
qWarning( "Creating session event" );
// then create our own event as otherwise the VNC server main loop
// will eat 100% CPU due to failing WaitForSingleObject() calls
m_shutdownEventHandle = CreateEvent( nullptr, false, false, "Global\\SessionEventUltra" );
}
else
{
qWarning( "Could not open or create session event" );
}
}
QCoreApplication::instance()->installNativeEventFilter( this );
}
bool LogoffEventFilter::nativeEventFilter( const QByteArray& eventType, void* message, long* result )
{
Q_UNUSED(eventType);
Q_UNUSED(result);
DWORD winMsg = ( ( MSG *) message )->message;
if( winMsg == WM_QUERYENDSESSION )
{
qInfo( "Got WM_QUERYENDSESSION - initiating server shutdown" );
// tell UltraVNC server to quit
SetEvent( m_shutdownEventHandle );
}
return false;
}
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