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/******************************************************************************
*
* Copyright (C) 2002 Hugo PEREIRA <mailto: hugo.pereira@free.fr>
*
* This 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 software 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. If not, see <http://www.gnu.org/licenses/>.
*
*******************************************************************************/
#include "NetworkConnectionMonitor.h"
#include "NonCopyable.h"
#include "Debug.h"
#if !defined(Q_OS_WIN)
#include <net/if.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#endif
#include <unistd.h>
//____________________________________________________________
namespace Network
{
//_______________________________________________________________________
class EncapsulatedSocket: private Base::NonCopyable<EncapsulatedSocket>
{
public:
//* constructor
explicit EncapsulatedSocket( int fileDescriptor ):
fileDescriptor_( fileDescriptor )
{}
//* copy constructor
explicit EncapsulatedSocket( const EncapsulatedSocket& other ) = delete;
//* assignment operator
EncapsulatedSocket& operator = ( const EncapsulatedSocket& other ) = delete;
//* destructor
~EncapsulatedSocket()
{ if( fileDescriptor_ >= 0 ) ::close( fileDescriptor_ ); }
int fileDescriptor() const
{ return fileDescriptor_; }
bool isValid() const
{ return fileDescriptor_ >= 0; }
private:
int fileDescriptor_;
};
//________________________________________________
ConnectionMonitor::ConnectionMonitor( QObject* parent ):
QObject( parent ),
Counter( "Network::ConnectionMonitor" )
{}
//______________________________________________________________________
void ConnectionMonitor::setEnabled( bool enabled )
{
#if !defined(Q_OS_WIN)
if( enabled == enabled_ ) return;
enabled_ = enabled;
if( deviceTimer_.isActive() ) deviceTimer_.stop();
if( enabled_ && timeOut_ >= 0 ) deviceTimer_.start( 1000*timeOut_, this );
#endif
}
//______________________________________________________________________
void ConnectionMonitor::setTimeOut( int timeOut )
{
if( timeOut == timeOut_ ) return;
timeOut_ = timeOut;
if( !enabled_ ) return;
if( deviceTimer_.isActive() ) deviceTimer_.stop();
if( timeOut_ >= 0 ) deviceTimer_.start( 1000*timeOut_, this );
}
//________________________________________________
ConnectionMonitor::DeviceSet ConnectionMonitor::devices( ConnectionMonitor::DeviceType type )
{
Debug::Throw( "Network::ConnectionMonitor::devices.\n" );
#if defined(Q_OS_WIN)
return DeviceSet();
#else
DeviceSet out;
for( int index = 1;;++index )
{
EncapsulatedSocket socket( ::socket(AF_INET, SOCK_DGRAM, 0) );
if( !socket.isValid() ) break;
struct ifreq ifr;
ifr.ifr_ifindex = index;
if( ioctl( socket.fileDescriptor(), SIOCGIFNAME, &ifr, sizeof(ifr) ) ) break;
if( ioctl( socket.fileDescriptor(), SIOCGIFFLAGS, &ifr, sizeof(ifr) ) ) break;
// skip loopback
if( ifr.ifr_flags & IFF_LOOPBACK ) continue;
// check status
if( type == DeviceType::Connected )
{
// check running status
if( !( ifr.ifr_flags & IFF_RUNNING ) ) continue;
// check bound address
if( ioctl( socket.fileDescriptor(), SIOCGIFADDR, &ifr, sizeof(ifr) ) ) continue;
}
QString device( ifr.ifr_name );
Debug::Throw() << "Network::ConnectionMonitor::devices - adding " << device << endl;
out.insert( device );
}
return out;
#endif
}
//________________________________________________
void ConnectionMonitor::checkDevice()
{
Debug::Throw( "ConnectionMonitor::checkDevice.\n" );
// get connected devices
auto devices( connectedDevices() );
// if no connected devices is found, clear current
if( devices.isEmpty() )
{
device_ = QString();
return;
}
// check if current device is in list found
if( !( device_.isEmpty() || devices.find( device_ ) == devices.end() ) )
{ return; }
// new device is found
device_ = *devices.begin();
emit deviceConnected( device_ );
}
//______________________________________________________________________
void ConnectionMonitor::timerEvent( QTimerEvent* event )
{
if( event->timerId() == deviceTimer_.timerId() ) checkDevice();
else return QObject::timerEvent( event );
}
}
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