1 files changed, 6 insertions, 0 deletions

diff --git a/noncore/net/wellenreiter/gui/wellenreiter.cpp b/noncore/net/wellenreiter/gui/wellenreiter.cpp
index e294eb8..d80a6e6 100644
--- a/noncore/net/wellenreiter/gui/wellenreiter.cpp
+++ b/noncore/net/wellenreiter/gui/wellenreiter.cpp
@@ -169,60 +169,66 @@ void Wellenreiter::startStopClicked()
     else
     {
         // get configuration from config window
 
         const QString& interface = configwindow->interfaceName->currentText();
         const int cardtype = configwindow->daemonDeviceType();
         const int interval = configwindow->daemonHopInterval();
 
         if ( ( interface == "" ) || ( cardtype == 0 ) )
         {
             QMessageBox::information( this, "Wellenreiter II", "Your device is not\nproperly configured. Please reconfigure!" );
             return;
         }
 
         // configure device
 
         ONetwork* net = ONetwork::instance();
         iface = static_cast<OWirelessNetworkInterface*>(net->interface( interface ));
 
         // set monitor mode
 
         switch ( cardtype )
         {
             case 1: iface->setMonitoring( new OCiscoMonitoringInterface( iface ) ); break;
             case 2: iface->setMonitoring( new OWlanNGMonitoringInterface( iface ) ); break;
             case 3: iface->setMonitoring( new OHostAPMonitoringInterface( iface ) ); break;
             case 4: iface->setMonitoring( new OOrinocoMonitoringInterface( iface ) ); break;
             default: assert( 0 ); // shouldn't happen
         }
 
         iface->setMonitorMode( true );
 
+        if ( !iface->monitorMode() )
+        {
+            QMessageBox::warning( this, "Wellenreiter II", "Can't set device into monitor mode." );
+            return;
+        }
+
         // open pcap and start sniffing
         pcap->open( interface );
 
         if ( !pcap->isOpen() )
         {
             QMessageBox::warning( this, "Wellenreiter II", "Can't open packet capturer:\n" + QString(strerror( errno ) ));
             return;
         }
 
         // set capturer to non-blocking mode
         pcap->setBlocking( false );
 
         // start channel hopper
         iface->setChannelHopping( 1000 ); //use interval from config window
 
         // connect
         connect( pcap, SIGNAL( receivedPacket(OPacket*) ), this, SLOT( receivePacket(OPacket*) ) );
 
         logwindow->log( "(i) Daemon has been started." );
         #ifdef QWS
         oApp->setTitle( "Scanning ..." );
         #else
         qApp->mainWidget()->setCaption( "Wellenreiter II / Scanning ..." );
         #endif
         sniffing = true;
 
     }
 }