decode DHCP ACK packets and show the extracted client IP address

2 files changed, 7 insertions, 4 deletions

diff --git a/noncore/net/wellenreiter/gui/scanlist.cpp b/noncore/net/wellenreiter/gui/scanlist.cpp
index 9d6ed6a..1cca507 100644
--- a/noncore/net/wellenreiter/gui/scanlist.cpp
+++ b/noncore/net/wellenreiter/gui/scanlist.cpp
@@ -186,384 +186,384 @@ void MScanListView::addNewItem( const QString& type,
     #ifdef DEBUG
     qDebug( "inserting new station %s", (const char*) macaddr );
     #endif
 
     MScanListItem* station = new MScanListItem( network, type, "", macaddr, wep, channel, signal );
     station->setManufacturer( mac.manufacturer() );
     station->setLocation( loc.latitude, loc.longitude );
 
     if ( type == "managed" )
     {
         s.sprintf( "(i) New Access Point in '%s' [%d]", (const char*) essid, channel );
     }
     else
     {
         s.sprintf( "(i) New AdHoc station in '%s' [%d]", (const char*) essid, channel );
     }
     MLogWindow::logwindow()->log( s );
 
 }
 
 
 void MScanListView::addIfNotExisting( MScanListItem* network, const OMacAddress& addr, const QString& type )
 {
     MScanListItem* subitem = static_cast<MScanListItem*>( network->firstChild() );
 
     while ( subitem && ( subitem->text( col_ap ) != addr.toString(true) ) )
     {
         #ifdef DEBUG
         qDebug( "subitemtext: %s", (const char*) subitem->text( col_ap ) );
         #endif
         subitem = static_cast<MScanListItem*> ( subitem->nextSibling() );
     }
 
     if ( subitem )
     {
         // we have already seen this item, it's a dupe
         #ifdef DEBUG
         qDebug( "%s is a dupe - ignoring...", (const char*) addr.toString(true) );
         #endif
         subitem->receivedBeacon(); //FIXME: sent data bit
         return;
     }
 
     // Hey, it seems to be a new item :-D
     MScanListItem* station = new MScanListItem( network, type, /* network->text( col_essid ) */ "", addr.toString(true), false, -1, -1 );
     station->setManufacturer( addr.manufacturer() );
 
     QString s;
     if ( type == "station" )
     {
         s.sprintf( "(i) New Station in '%s' [xx]", (const char*) network->text( col_essid ) );
     }
     else
     {
         s.sprintf( "(i) New Wireless Station in '%s' [xx]", (const char*) network->text( col_essid ) );
     }
     MLogWindow::logwindow()->log( s );
 }
 
 
 void MScanListView::WDStraffic( const OMacAddress& from, const OMacAddress& to, const OMacAddress& viaFrom, const OMacAddress& viaTo )
 {
     QString s;
     MScanListItem* network;
 
     QListViewItemIterator it( this );
     while ( it.current() &&
             it.current()->text( col_ap ) != viaFrom.toString(true) &&
             it.current()->text( col_ap ) != viaTo.toString(true) ) ++it;
 
     MScanListItem* item = static_cast<MScanListItem*>( it.current() );
 
     if ( item ) // Either viaFrom or viaTo AP has shown up yet, so just add our two new stations
     {
         addIfNotExisting( static_cast<MScanListItem*>(item->parent()), from );
         addIfNotExisting( static_cast<MScanListItem*>(item->parent()), to );
     }
     else
     {
         qDebug( "D'Oh! Stations without AP... ignoring for now... will handle this in 1.1 version :-D" );
         MLogWindow::logwindow()->log( "WARNING: Unhandled WSD traffic!" );
     }
 }
 
 
 void MScanListView::toDStraffic( const OMacAddress& from, const OMacAddress& to, const OMacAddress& via )
 {
     QString s;
     MScanListItem* network;
 
     QListViewItemIterator it( this );
     while ( it.current() && it.current()->text( col_ap ) != via.toString(true) ) ++it;
 
     MScanListItem* item = static_cast<MScanListItem*>( it.current() );
 
     if ( item ) // AP has shown up yet, so just add our new "from" - station
     {
         addIfNotExisting( static_cast<MScanListItem*>(item->parent()), from, "adhoc" );
     }
     else
     {
         qDebug( "D'Oh! Station without AP... ignoring for now... will handle this in 1.1 :-D" );
         MLogWindow::logwindow()->log( "WARNING: Unhandled toDS traffic!" );
 
     }
 }
 
 
 void MScanListView::fromDStraffic( const OMacAddress& from, const OMacAddress& to, const OMacAddress& via )
 {
     QString s;
     MScanListItem* network;
 
     QListViewItemIterator it( this );
     while ( it.current() && it.current()->text( col_ap ) != via.toString(true) ) ++it;
 
     MScanListItem* item = static_cast<MScanListItem*>( it.current() );
 
     if ( item ) // AP has shown up yet, so just add our new "from" - station
     {
         addIfNotExisting( static_cast<MScanListItem*>(item->parent()), from, "station" );
     }
     else
     {
         qDebug( "D'Oh! Station without AP... ignoring for now... will handle this in 1.1 :-D" );
         MLogWindow::logwindow()->log( "WARNING: Unhandled fromDS traffic!" );
     }
 }
 
 
 void MScanListView::IBSStraffic( const OMacAddress& from, const OMacAddress& to, const OMacAddress& via )
 {
     qWarning( "D'oh! Not yet implemented..." );
     MLogWindow::logwindow()->log( "WARNING: Unhandled IBSS traffic!" );
 }
 
 
 void MScanListView::identify( const OMacAddress& macaddr, const QString& ip )
 {
     qDebug( "identify %s = %s", (const char*) macaddr.toString(), (const char*) ip );
 
     QListViewItemIterator it( this );
     for ( ; it.current(); ++it )
     {
         if ( it.current()->text( col_ap ) == macaddr.toString(true) )
         {
             it.current()->setText( col_ip, ip );
             return;
         }
     }
     qDebug( "D'oh! Received identification, but item not yet in list... ==> Handle this!" );
     MLogWindow::logwindow()->log( QString().sprintf( "WARNING: Unhandled identification %s = %s!",
                                                      (const char*) macaddr.toString(), (const char*) ip ) );
 }
 
 
 void MScanListView::addService( const QString& name, const OMacAddress& macaddr, const QString& ip )
 {
     qDebug( "addService '%s', Server = %s = %s", (const char*) name, (const char*) macaddr.toString(), (const char*) ip );
 
     //TODO: Refactor that out, we need it all over the place.
     //      Best to do it in a more comfortable abstraction in OListView
     //      (Hmm, didn't I already start something in this direction?)
 
     QListViewItemIterator it( this );
     for ( ; it.current(); ++it )
     {
         if ( it.current()->text( col_ap ) == macaddr.toString(true) )
         {
 
             MScanListItem* subitem = static_cast<MScanListItem*>( it.current()->firstChild() );
 
             while ( subitem && ( subitem->text( col_essid ) != name ) )
             {
                 #ifdef DEBUG
                 qDebug( "subitemtext: %s", (const char*) subitem->text( col_essid ) );
                 #endif
                 subitem = static_cast<MScanListItem*> ( subitem->nextSibling() );
             }
 
             if ( subitem )
             {
                 // we have already seen this item, it's a dupe
                 #ifdef DEBUG
                 qDebug( "%s is a dupe - ignoring...", (const char*) name );
                 #endif
                 subitem->receivedBeacon(); //FIXME: sent data bit
                 return;
             }
 
             // never seen that - add new item
 
-            MScanListItem* item = new MScanListItem( it.current(), "service", "N/A", false, -1, -1 );
+            MScanListItem* item = new MScanListItem( it.current(), "service", "N/A", " ", false, -1, -1 );
             item->setText( col_essid, name );
 
             return;
         }
     }
     qDebug( "D'oh! Received identification, but item not yet in list... ==> Handle this!" );
     MLogWindow::logwindow()->log( QString().sprintf( "WARNING: Unhandled service addition %s = %s!",
                                                      (const char*) macaddr.toString(), (const char*) ip ) );
 }
 
 
 void MScanListView::contextMenuRequested( QListViewItem* item, const QPoint&, int col )
 {
     if ( !item ) return;
 
     MScanListItem* itm = static_cast<MScanListItem*>( item );
 
     qDebug( "contextMenuRequested on item '%s' (%s) in column: '%d'",
             (const char*) itm->text(0), (const char*) itm->type, col );
 
     if ( itm->type == "adhoc" || itm->type == "managed" )
     {
         QString entry = QString().sprintf( "&Join %s Net '%s'...", (const char*) itm->type, (const char*) itm->essid() );
 
         QPopupMenu m( this );
         m.insertItem( entry, 37773, 0 );
         int result = m.exec( QCursor::pos() );
         if ( result == 37773 )
             emit joinNetwork( itm->type, itm->essid(), itm->channel(), itm->macaddr() );
     }
 }
 
 //============================================================
 // MScanListItem
 //============================================================
 
 MScanListItem::MScanListItem( QListView* parent, QString type, QString essid, QString macaddr,
                               bool wep, int channel, int signal )
                :OListViewItem( parent, essid, QString::null, macaddr, QString::null, QString::null ),
                 _type( type ), _essid( essid ), _macaddr( macaddr ), _wep( wep ),
                 _channel( channel ), _signal( signal ), _beacons( 1 )
 {
     #ifdef DEBUG
     qDebug( "creating scanlist item" );
     #endif
     if ( WellenreiterConfigWindow::instance() && type == "network" )
         playSound( WellenreiterConfigWindow::instance()->soundOnNetwork() );
     decorateItem( type, essid, macaddr, wep, channel, signal );
 }
 
 MScanListItem::MScanListItem( QListViewItem* parent, QString type, QString essid, QString macaddr,
                               bool wep, int channel, int signal )
                :OListViewItem( parent, essid, QString::null, macaddr, QString::null, QString::null )
 {
     #ifdef DEBUG
     qDebug( "creating scanlist item" );
     #endif
     decorateItem( type, essid, macaddr, wep, channel, signal );
 }
 
 const QString& MScanListItem::essid() const
 {
     if ( type == "network" )
         return _essid;
     else
         return ( (MScanListItem*) parent() )->essid();
 }
 
 OListViewItem* MScanListItem::childFactory()
 {
     return new MScanListItem( this );
 }
 
 void MScanListItem::serializeTo( QDataStream& s ) const
 {
     #ifdef DEBUG
     qDebug( "serializing MScanListItem" );
     #endif
     OListViewItem::serializeTo( s );
 
     s << _type;
     s << (Q_UINT8) ( _wep ? 'y' : 'n' );
 }
 
 void MScanListItem::serializeFrom( QDataStream& s )
 {
     #ifdef DEBUG
     qDebug( "serializing MScanListItem" );
     #endif
     OListViewItem::serializeFrom( s );
 
     char wep;
     s >> _type;
     s >> (Q_UINT8) wep;
     _wep = (wep == 'y');
 
     QString name;
     name.sprintf( "wellenreiter/%s", (const char*) _type );
     setPixmap( col_type, Resource::loadPixmap( name ) );
     if ( _wep )
         setPixmap( col_wep, Resource::loadPixmap( "wellenreiter/cracked" ) ); //FIXME: rename the pixmap!
     listView()->triggerUpdate();
 }
 
 void MScanListItem::decorateItem( QString type, QString essid, QString macaddr, bool wep, int channel, int signal )
 {
     #ifdef DEBUG
     qDebug( "decorating scanlist item %s / %s / %s [%d]",
         (const char*) type,
         (const char*) essid,
         (const char*) macaddr,
         channel );
     #endif
 
     // set icon for managed or adhoc mode
     QString name;
     name.sprintf( "wellenreiter/%s", (const char*) type );
     setPixmap( col_type, Resource::loadPixmap( name ) );
 
     // set icon for wep (wireless encryption protocol)
     if ( wep )
         setPixmap( col_wep, Resource::loadPixmap( "wellenreiter/cracked" ) ); //FIXME: rename the pixmap!
 
     // set channel and signal text
 
     if ( signal != -1 )
         setText( col_sig, QString::number( signal ) );
     if ( channel != -1 )
         setText( col_channel, QString::number( channel ) );
 
     setText( col_firstseen, QTime::currentTime().toString() );
     //setText( col_lastseen, QTime::currentTime().toString() );
 
     listView()->triggerUpdate();
 
     this->type = type;
     _type = type;
     _essid = essid;
     _macaddr = macaddr;
     _channel = channel;
     _beacons = 1;
     _signal = 0;
 
     if ( WellenreiterConfigWindow::instance()->openTree->isChecked() )
     {
         listView()->ensureItemVisible( this );
     }
 
 }
 
 
 void MScanListItem::setManufacturer( const QString& manufacturer )
 {
     setText( col_manuf, manufacturer );
 }
 
 
 void MScanListItem::setLocation( const float& latitude, const float& longitude )
 {
     if ( latitude == 0.0 || longitude == 0.0 )
         setText( col_location, "N/A" );
     else
         setText( col_location, QString().sprintf( "%.2f / %.2f", latitude, longitude ) );
 }
 
 
 void MScanListItem::playSound( const QString& sound ) const
 {
     #ifdef QWS
     if ( sound == "Ignore" ) return;
     else if ( sound == "Touch" ) ODevice::inst()->touchSound();
     else if ( sound == "Key" ) ODevice::inst()->keySound();
     else if ( sound == "Alarm" ) ODevice::inst()->alarmSound();
     #endif
 }
 
 
 void MScanListItem::receivedBeacon()
 {
     _beacons++;
     #ifdef DEBUG
     qDebug( "MScanListItem %s: received beacon #%d", (const char*) _macaddr, _beacons );
     #endif
     setText( col_sig, QString::number( _beacons ) );
     setText( col_lastseen, QTime::currentTime().toString() );
 
     MScanListItem* p = (MScanListItem*) parent();
     if ( p ) p->receivedBeacon();
 
 }
 
diff --git a/noncore/net/wellenreiter/gui/wellenreiter.cpp b/noncore/net/wellenreiter/gui/wellenreiter.cpp
index 7394742..9460f56 100644
--- a/noncore/net/wellenreiter/gui/wellenreiter.cpp
+++ b/noncore/net/wellenreiter/gui/wellenreiter.cpp
@@ -67,390 +67,393 @@ using namespace Opie;
 Wellenreiter::Wellenreiter( QWidget* parent )
     : WellenreiterBase( parent, 0, 0 ),
       sniffing( false ), iface( 0 ), configwindow( 0 )
 {
 
     logwindow->log( "(i) Wellenreiter has been started." );
 
     //
     // detect operating system
     //
 
     #ifdef QWS
     QString sys;
     sys.sprintf( "(i) Running on '%s'.", (const char*) ODevice::inst()->systemString() );
     _system = ODevice::inst()->system();
     logwindow->log( sys );
     #endif
 
     netview->setColumnWidthMode( 1, QListView::Manual );
     connect( netview, SIGNAL( joinNetwork(const QString&,const QString&,int,const QString&) ),
              this, SLOT( joinNetwork(const QString&,const QString&,int,const QString&) ) );
     pcap = new OPacketCapturer();
 
     gps = new GPS( this );
 }
 
 
 Wellenreiter::~Wellenreiter()
 {
     delete pcap;
 }
 
 
 void Wellenreiter::setConfigWindow( WellenreiterConfigWindow* cw )
 {
     configwindow = cw;
 }
 
 
 void Wellenreiter::channelHopped(int c)
 {
     QString title = "Wellenreiter II -scan- [";
     QString left;
     if ( c > 1 ) left.fill( '.', c-1 );
     title.append( left );
     title.append( '|' );
     if ( c < iface->channels() )
     {
         QString right;
         right.fill( '.', iface->channels()-c );
         title.append( right );
     }
     title.append( "]" );
     //title.append( QString().sprintf( " %02d", c ) );
     assert( parent() );
     ( (QMainWindow*) parent() )->setCaption( title );
 }
 
 
 void Wellenreiter::handleNotification( OPacket* p )
 {
     QObjectList* l = p->queryList();
     QObjectListIt it( *l );
     QObject* o;
 
     while ( (o = it.current()) != 0 )
     {
         QString name = it.current()->name();
         if ( configwindow->parsePackets->isProtocolChecked( name ) )
         {
             QString action = configwindow->parsePackets->protocolAction( name );
             qDebug( "parsePacket-action for '%s' seems to be '%s'", (const char*) name, (const char*) action );
             doAction( action, name, p );
         }
         else
         {
             qDebug( "protocol '%s' not checked in parsePackets.", (const char*) name );
         }
     ++it;
     }
 }
 
 
 void Wellenreiter::handleBeacon( OPacket* p, OWaveLanManagementPacket* beacon )
 {
     QString type;
     if ( beacon->canIBSS() )
     {
         type = "adhoc";
     }
     else if ( beacon->canESS() )
     {
         type = "managed";
     }
     else
     {
         qWarning( "Wellenreiter::invalid frame [possibly noise] detected!" );
         return;
     }
 
     OWaveLanManagementSSID* ssid = static_cast<OWaveLanManagementSSID*>( p->child( "802.11 SSID" ) );
     QString essid = ssid ? ssid->ID() : QString("<unknown>");
     OWaveLanManagementDS* ds = static_cast<OWaveLanManagementDS*>( p->child( "802.11 DS" ) );
     int channel = ds ? ds->channel() : -1;
 
     OWaveLanPacket* header = static_cast<OWaveLanPacket*>( p->child( "802.11" ) );
 
     GpsLocation loc( 0, 0 );
     if ( configwindow->enableGPS->isChecked() )
     {
         // TODO: add check if GPS is working!?
         qDebug( "Wellenreiter::gathering GPS data..." );
         loc = gps->position();
         qDebug( "Wellenreiter::GPS data received is ( %f , %f )", loc.latitude, loc.longitude );
     }
 
     netView()->addNewItem( type, essid, header->macAddress2(), beacon->canPrivacy(), channel, 0, loc );
 
     // update graph window
     if ( ds )
     {
         OPrismHeaderPacket* prism = static_cast<OPrismHeaderPacket*>( p->child( "Prism" ) );
         if ( prism )
             graphwindow->traffic( ds->channel(), prism->signalStrength() );
         else
             graphwindow->traffic( ds->channel(), 95 );
     }
 }
 
 
 void Wellenreiter::handleWlanData( OPacket* p, OWaveLanDataPacket* data, OMacAddress& from, OMacAddress& to )
 {
     OWaveLanPacket* wlan = (OWaveLanPacket*) p->child( "802.11" );
     if ( wlan->fromDS() && !wlan->toDS() )
     {
         netView()->fromDStraffic( wlan->macAddress3(), wlan->macAddress1(), wlan->macAddress2() );
         from = wlan->macAddress3();
         to = wlan->macAddress2();
     }
     else if ( !wlan->fromDS() && wlan->toDS() )
     {
         netView()->toDStraffic( wlan->macAddress2(), wlan->macAddress3(), wlan->macAddress1() );
         from = wlan->macAddress2();
         to = wlan->macAddress3();
     }
     else if ( wlan->fromDS() && wlan->toDS() )
     {
         netView()->WDStraffic( wlan->macAddress4(), wlan->macAddress3(), wlan->macAddress1(), wlan->macAddress2() );
         from = wlan->macAddress4();
         to = wlan->macAddress3();
     }
     else
     {
         netView()->IBSStraffic( wlan->macAddress2(), wlan->macAddress1(), wlan->macAddress3() );
         from = wlan->macAddress2();
         to = wlan->macAddress1();
     }
 }
 
 
 void Wellenreiter::handleEthernetData( OPacket* p, OEthernetPacket* data, OMacAddress& from, OMacAddress& to )
 {
     from = data->sourceAddress();
     to = data->destinationAddress();
 
     netView()->addNewItem( "station", "<wired>", from, false, -1, 0, GpsLocation( 0, 0 ) );
 }
 
 
 void Wellenreiter::handleIPData( OPacket* p, OIPPacket* ip, OMacAddress& source, OMacAddress& dest )
 {
     OARPPacket* arp = (OARPPacket*) p->child( "ARP" );
     if ( arp )
     {
         qDebug( "Received ARP traffic (type '%s'): ", (const char*) arp->type() );
         if ( arp->type() == "REQUEST" )
         {
             netView()->identify( arp->senderMacAddress(), arp->senderIPV4Address().toString() );
         }
         else if ( arp->type() == "REPLY" )
         {
             netView()->identify( arp->senderMacAddress(), arp->senderIPV4Address().toString() );
             netView()->identify( arp->targetMacAddress(), arp->targetIPV4Address().toString() );
         }
     }
 
     ODHCPPacket* dhcp = (ODHCPPacket*) p->child( "DHCP" );
     if ( dhcp )
     {
         qDebug( "Received DHCP '%s' packet", (const char*) dhcp->type() );
         if ( dhcp->type() == "OFFER" )
         {
-            qDebug( "ADDSERVICE: '%s' ('%s') seems to be a DHCP server.", (const char*) source.toString(), (const char*) dhcp->serverAddress().toString() );
-            //netView()->addNewItem( "station", "<wired>", from, false, -1, 0, GpsLocation( 0, 0 ) );
-
+            qDebug( "DHCP: '%s' ('%s') seems to be a DHCP server.", (const char*) source.toString(), (const char*) dhcp->serverAddress().toString() );
             netView()->identify( source, dhcp->serverAddress().toString() );
             netView()->addService( "DHCP", source, dhcp->serverAddress().toString() );
         }
+        else if ( dhcp->type() == "ACK" )
+        {
+            qDebug( "DHCP: '%s' ('%s') accepted the offered DHCP address.", (const char*) dhcp->clientMacAddress().toString(), (const char*) dhcp->yourAddress().toString() );
+            netView()->identify( dhcp->clientMacAddress(), dhcp->yourAddress().toString() );
+        }
     }
 }
 
 
 QObject* Wellenreiter::childIfToParse( OPacket* p, const QString& protocol )
 {
     if ( configwindow->parsePackets->isProtocolChecked( protocol ) )
         if ( configwindow->parsePackets->protocolAction( protocol ) == "Discard!" )
             return 0;
 
     return p->child( protocol );
 }
 
 
 bool Wellenreiter::checkDumpPacket( OPacket* p )
 {
     // go through all child packets and see if one is inside the child hierarchy for p
     // if so, do what the user requested (protocolAction), e.g. pass or discard
     if ( !configwindow->writeCaptureFile->isChecked() )
         return false;
 
     QObjectList* l = p->queryList();
     QObjectListIt it( *l );
     QObject* o;
 
     while ( (o = it.current()) != 0 )
     {
         QString name = it.current()->name();
         if ( configwindow->capturePackets->isProtocolChecked( name ) )
         {
             QString action = configwindow->capturePackets->protocolAction( name );
             qDebug( "capturePackets-action for '%s' seems to be '%s'", (const char*) name, (const char*) action );
             if ( action == "Discard" )
             {
                 logwindow->log( QString().sprintf( "(i) dump-discarding of '%s' packet requested.", (const char*) name ) );
                 return false;
             }
         }
         else
         {
             qDebug( "protocol '%s' not checked in capturePackets.", (const char*) name );
         }
     ++it;
     }
     return true;
 }
 
 
 void Wellenreiter::receivePacket( OPacket* p )
 {
     hexWindow()->log( p->dump( 8 ) );
 
     if ( checkDumpPacket( p ) )
     {
         pcap->dump( p );
     }
 
     // check if we received a beacon frame
     OWaveLanManagementPacket* beacon = static_cast<OWaveLanManagementPacket*>( childIfToParse( p, "802.11 Management" ) );
     if ( beacon && beacon->managementType() == "Beacon" )
     {
         handleBeacon( p, beacon );
         return;
     }
 
     OMacAddress source;
     OMacAddress dest;
 
     //TODO: WEP check here
 
     // check for a wireless data frame
     OWaveLanDataPacket* wlan = static_cast<OWaveLanDataPacket*>( childIfToParse( p, "802.11 Data" ) );
     if ( wlan )
     {
         handleWlanData( p, wlan, source, dest );
     }
 
     // check for a wired data frame
     OEthernetPacket* eth = static_cast<OEthernetPacket*>( childIfToParse( p, "Ethernet" ) );
     if ( eth )
     {
         handleEthernetData( p, eth, source, dest );
     }
 
     // check for a ip frame
     OIPPacket* ip = static_cast<OIPPacket*>( childIfToParse( p, "IP" ) );
     if ( ip )
     {
         handleIPData( p, ip, source, dest );
     }
 
     //handleNotification( p );
 
 }
 
 
 void Wellenreiter::stopClicked()
 {
     if ( iface )
     {
         disconnect( SIGNAL( receivedPacket(OPacket*) ), this, SLOT( receivePacket(OPacket*) ) );
         disconnect( SIGNAL( hopped(int) ), this, SLOT( channelHopped(int) ) );
         iface->setChannelHopping(); // stop hopping channels
     }
     else
         killTimers();
 
     pcap->close();
     sniffing = false;
 
     if ( iface )
     {
         // switch off monitor mode
         iface->setMonitorMode( false );
         // switch off promisc flag
         iface->setPromiscuousMode( false );
 
         system( "cardctl reset; sleep 1" ); //FIXME: Use OProcess
     }
 
     logwindow->log( "(i) Stopped Scanning." );
     assert( parent() );
     ( (QMainWindow*) parent() )->setCaption( "Wellenreiter II" );
 
     // message the user
     QMessageBox::information( this, "Wellenreiter II",
                               tr( "Your wireless card\nshould now be usable again." ) );
 
     sniffing = false;
     emit( stoppedSniffing() );
 
     #ifdef QWS
     if ( WellenreiterConfigWindow::instance()->disablePM->isChecked() )
     {
         QCopEnvelope( "QPE/System", "setScreenSaverMode(int)" ) << QPEApplication::Enable;
     }
     #else
         #warning FIXME: setScreenSaverMode is not operational on the X11 build
     #endif
 
     // print out statistics
     for( QMap<QString,int>::ConstIterator it = pcap->statistics().begin(); it != pcap->statistics().end(); ++it )
        statwindow->updateCounter( it.key(), it.data() );
 }
 
 
 void Wellenreiter::startClicked()
 {
     // get configuration from config window
 
     const QString& interface = configwindow->interfaceName->currentText();
     const int cardtype = configwindow->driverType();
     const int interval = configwindow->hoppingInterval();
 
     if ( ( interface == "" ) || ( cardtype == 0 ) )
     {
         QMessageBox::information( this, "Wellenreiter II",
                                   tr( "Your device is not\nproperly configured. Please reconfigure!" ) );
         return;
     }
 
     // configure device
     ONetwork* net = ONetwork::instance();
 
     // TODO: check if interface is wireless and support sniffing for non-wireless interfaces
 
     iface = static_cast<OWirelessNetworkInterface*>(net->interface( interface )); // fails if network is not wireless!
 
     // bring device UP
     if ( cardtype != DEVTYPE_FILE )
     {
         iface->setUp( true );
         if ( !iface->isUp() )
         {
             QMessageBox::warning( this, "Wellenreiter II",
                                 tr( "Can't bring interface '%1' up:\n" ).arg( iface->name() ) + strerror( errno ) );
             return;
         }
     }
     // set monitor mode
     bool usePrism = configwindow->usePrismHeader();
 
     switch ( cardtype )
     {
         case DEVTYPE_CISCO: iface->setMonitoring( new OCiscoMonitoringInterface( iface, usePrism ) ); break;
         case DEVTYPE_WLAN_NG: iface->setMonitoring( new OWlanNGMonitoringInterface( iface, usePrism ) ); break;
         case DEVTYPE_HOSTAP: iface->setMonitoring( new OHostAPMonitoringInterface( iface, usePrism ) ); break;
         case DEVTYPE_ORINOCO: iface->setMonitoring( new OOrinocoMonitoringInterface( iface, usePrism ) ); break;
         case DEVTYPE_MANUAL: QMessageBox::information( this, "Wellenreiter II", tr( "Bring your device into\nmonitor mode now." ) ); break;
         case DEVTYPE_FILE: qDebug( "Wellenreiter: Capturing from file '%s'", (const char*) interface ); break;
         default: assert( 0 ); // shouldn't reach this
     }