add scanning skeleton (wip)

3 files changed, 131 insertions, 23 deletions

diff --git a/libopie2/examples/opienet/onetworkdemo/onetworkdemo.cpp b/libopie2/examples/opienet/onetworkdemo/onetworkdemo.cpp
index 607d8f1..fc2026f 100644
--- a/libopie2/examples/opienet/onetworkdemo/onetworkdemo.cpp
+++ b/libopie2/examples/opienet/onetworkdemo/onetworkdemo.cpp
@@ -47,24 +47,36 @@ int main( int argc, char** argv )
                 qDebug( "DEMO: Operation Mode change successful." );
 
             // RF channel
             qDebug( "DEMO: Current Channel is '%d'", iface->channel() );
             iface->setChannel( 1 );
             if ( iface->channel() != 1 )
                 qDebug( "DEMO: Warning! Can't change RF channel" );
             else
                 qDebug( "DEMO: RF channel change successful." );
 
             iface->setMode( "managed" );
 
+            // network scan
+
+            int stations = iface->scanNetwork();
+            if ( stations != -1 )
+            {
+                qDebug( "DEMO: # of stations around = %d", stations );
+            }
+            else
+            {
+                qDebug( "DEMO: Warning! Scan didn't work!" );
+            }
+
             /*
 
             // first some wrong calls to check if this is working
             iface->setPrivate( "seppel", 10 );
             iface->setPrivate( "monitor", 0 );
 
             // now the real deal
             iface->setPrivate( "monitor", 2, 2, 3 );
 
             // trying to set hw address to 12:34:56:AB:CD:EF
 
             /*
diff --git a/libopie2/opienet/onetwork.cpp b/libopie2/opienet/onetwork.cpp
index dc2e388..be45924 100644
--- a/libopie2/opienet/onetwork.cpp
+++ b/libopie2/opienet/onetwork.cpp
@@ -67,24 +67,25 @@ ONetwork* ONetwork::_instance = 0;
 ONetwork::ONetwork()
 {
     qDebug( "ONetwork::ONetwork()" );
     qDebug( "ONetwork: This code has been compiled against Wireless Extensions V%d", WIRELESS_EXT );
     synchronize();
 }
 
 void ONetwork::synchronize()
 {
     // gather available interfaces by inspecting /proc/net/dev
     //FIXME: we could use SIOCGIFCONF here, but we aren't interested in virtual (e.g. eth0:0) devices
     //FIXME: Use SIOCGIFCONF anway, because we can disable listing of aliased devices
+    //FIXME: Best is use SIOCGIFCONF and if this doesn't work (result=-1), then fallback to parsing /proc/net/dev
 
     _interfaces.clear();
     QString str;
     QFile f( "/proc/net/dev" );
     bool hasFile = f.open( IO_ReadOnly );
     if ( !hasFile )
     {
         qDebug( "ONetwork: /proc/net/dev not existing. No network devices available" );
         return;
     }
     QTextStream s( &f );
     s.readLine();
@@ -179,27 +180,27 @@ void ONetworkInterface::init()
     if ( _sfd == -1 )
     {
         qDebug( "ONetworkInterface::init(): Warning - can't get socket for device '%s'", name() );
         return;
     }
 }
 
 
 bool ONetworkInterface::ioctl( int call, struct ifreq& ifreq ) const
 {
     int result = ::ioctl( _sfd, call, &ifreq );
     if ( result == -1 )
-        qDebug( "ONetworkInterface::ioctl (%s) call %d - Status: Failed: %d (%s)", name(), call, result, strerror( errno ) );
+        qDebug( "ONetworkInterface::ioctl (%s) call %d (0x%04X) - Status: Failed: %d (%s)", name(), call, call, result, strerror( errno ) );
     else
-        qDebug( "ONetworkInterface::ioctl (%s) call %d - Status: Ok.", name(), call );
+        qDebug( "ONetworkInterface::ioctl (%s) call %d (0x%04X) - Status: Ok.", name(), call, call );
     return ( result != -1 );
 }
 
 
 bool ONetworkInterface::ioctl( int call ) const
 {
     strcpy( _ifr.ifr_name, name() );
     return ioctl( call, _ifr );
 }
 
 
 bool ONetworkInterface::isLoopback() const
@@ -445,26 +446,34 @@ OWirelessNetworkInterface::~OWirelessNetworkInterface()
 
 
 struct iwreq& OWirelessNetworkInterface::iwr() const
 {
     return _iwr;
 }
 
 
 void OWirelessNetworkInterface::init()
 {
     qDebug( "OWirelessNetworkInterface::init()" );
     memset( &_iwr, 0, sizeof( struct iwreq ) );
-    buildChannelList();
+    buildInformation();
     buildPrivateList();
+    dumpInformation();
+}
+
+
+bool OWirelessNetworkInterface::isAssociated() const
+{
+    //FIXME: handle different modes
+    return associatedAP() != "44:44:44:44:44:44";
 }
 
 
 QString OWirelessNetworkInterface::associatedAP() const
 {
     //FIXME: use OMacAddress
     QString mac;
 
     if ( ioctl( SIOCGIWAP ) )
     {
         mac.sprintf( "%.2X:%.2X:%.2X:%.2X:%.2X:%.2X",
         _ifr.ifr_hwaddr.sa_data[0]&0xff,
@@ -473,86 +482,89 @@ QString OWirelessNetworkInterface::associatedAP() const
         _ifr.ifr_hwaddr.sa_data[3]&0xff,
         _ifr.ifr_hwaddr.sa_data[4]&0xff,
         _ifr.ifr_hwaddr.sa_data[5]&0xff );
     }
     else
     {
         mac = "<Unknown>";
     }
     return mac;
 }
 
 
-void OWirelessNetworkInterface::buildChannelList()
+void OWirelessNetworkInterface::buildInformation()
 {
     //ML: If you listen carefully enough, you can hear lots of WLAN drivers suck
     //ML: The HostAP drivers need more than sizeof struct_iw range to complete
     //ML: SIOCGIWRANGE otherwise they fail with "Invalid Argument Length".
     //ML: The Wlan-NG drivers on the otherside fail (segfault!) if you allocate
     //ML: _too much_ space. This is damn shitty crap *sigh*
     //ML: We allocate a large memory region in RAM and check whether the
     //ML: driver pollutes this extra space. The complaint will be made on stdout,
     //ML: so please forward this...
 
     struct iwreq wrq;
     int len = sizeof( struct iw_range )*2;
     char *buffer = (char*) malloc( len );
     //FIXME: Validate if we actually got the memory block
     memset( buffer, 0, len );
     memcpy( wrq.ifr_name, name(), IFNAMSIZ);
     wrq.u.data.pointer = (caddr_t) buffer;
     wrq.u.data.length = sizeof( struct iw_range );
     wrq.u.data.flags = 0;
 
     if ( ::ioctl( _sfd, SIOCGIWRANGE, &wrq ) == -1 )
     {
-        qDebug( "OWirelessNetworkInterface::buildChannelList(): SIOCGIWRANGE failed (%s) - defaulting to 11 channels", strerror( errno ) );
+        qDebug( "OWirelessNetworkInterface::buildInformation(): SIOCGIWRANGE failed (%s) - using default values.", strerror( errno ) );
         _channels.insert( 2412,  1 ); // 2.412 GHz
         _channels.insert( 2417,  2 ); // 2.417 GHz
         _channels.insert( 2422,  3 ); // 2.422 GHz
         _channels.insert( 2427,  4 ); // 2.427 GHz
         _channels.insert( 2432,  5 ); // 2.432 GHz
         _channels.insert( 2437,  6 ); // 2.437 GHz
         _channels.insert( 2442,  7 ); // 2.442 GHz
         _channels.insert( 2447,  8 ); // 2.447 GHz
         _channels.insert( 2452,  9 ); // 2.452 GHz
         _channels.insert( 2457, 10 ); // 2.457 GHz
         _channels.insert( 2462, 11 ); // 2.462 GHz
+
+        memset( &_range, 0, sizeof( struct iw_range ) );
     }
     else
     {
         // <check if the driver overwrites stuff>
         int max = 0;
         for ( int r = sizeof( struct iw_range ); r < len; r++ )
             if (buffer[r] != 0)
                 max = r;
         if (max > 0)
         {
-            qWarning( "OWirelessNetworkInterface::buildChannelList(): Driver for wireless interface '%s'"
-                    "overwrote buffer end with at least %i bytes!\n", name(), max - sizeof( struct iw_range ) );
+            qWarning( "OWirelessNetworkInterface::buildInformation(): Driver for wireless interface '%s' sucks!\n"
+                    "It overwrote the buffer end with at least %i bytes!\n", name(), max - sizeof( struct iw_range ) );
         }
         // </check if the driver overwrites stuff>
 
         struct iw_range range;
         memcpy( &range, buffer, sizeof range );
 
-        qDebug( "OWirelessNetworkInterface::buildChannelList(): Interface %s reported to have %d channels.", name(), range.num_frequency );
+        qDebug( "OWirelessNetworkInterface::buildInformation(): Interface %s reported to have %d channels.", name(), range.num_frequency );
         for ( int i = 0; i < range.num_frequency; ++i )
         {
             int freq = (int) ( double( range.freq[i].m ) * pow( 10.0, range.freq[i].e ) / 1000000.0 );
             _channels.insert( freq, i+1 );
         }
     }
 
-    qDebug( "OWirelessNetworkInterface::buildChannelList(): Channel list constructed." );
+    memcpy( &_range, buffer, sizeof( struct iw_range ) );
+    qDebug( "OWirelessNetworkInterface::buildInformation(): Information block constructed." );
     free(buffer);
 }
 
 
 void OWirelessNetworkInterface::buildPrivateList()
 {
     qDebug( "OWirelessNetworkInterface::buildPrivateList()" );
 
     struct iw_priv_args priv[IW_MAX_PRIV_DEF];
 
     _iwr.u.data.pointer = (char*) &priv;
     _iwr.u.data.length = IW_MAX_PRIV_DEF; // length in terms of number of (sizeof iw_priv_args), not (sizeof iw_priv_args) itself
@@ -563,24 +575,35 @@ void OWirelessNetworkInterface::buildPrivateList()
         qDebug( "OWirelessNetworkInterface::buildPrivateList(): SIOCGIWPRIV failed (%s) - can't get private ioctl information.", strerror( errno ) );
         return;
     }
 
     for ( int i = 0; i < _iwr.u.data.length; ++i )
     {
         new OPrivateIOCTL( this, priv[i].name, priv[i].cmd, priv[i].get_args, priv[i].set_args );
     }
     qDebug( "OWirelessNetworkInterface::buildPrivateList(): Private IOCTL list constructed." );
 }
 
 
+void OWirelessNetworkInterface::dumpInformation() const
+{
+    qDebug( "OWirelessNetworkInterface::() -------------- dumping information block ----------------" );
+
+    qDebug( " - driver's idea of maximum throughput is %d bps = %d byte/s = %d Kb/s = %f.2 Mb/s", _range.throughput, _range.throughput / 8, _range.throughput / 8 / 1024, float( _range.throughput ) / 8.0 / 1024.0 / 1024.0 );
+    qDebug( " - driver for '%s' has been compiled against WE V%d (source=V%d)", name(), _range.we_version_compiled, _range.we_version_source );
+
+    qDebug( "OWirelessNetworkInterface::() ---------------------------------------------------------" );
+}
+
+
 int OWirelessNetworkInterface::channel() const
 {
     //FIXME: When monitoring enabled, then use it
     //FIXME: to gather the current RF channel
     //FIXME: Until then, get active channel from hopper.
     if ( _hopper && _hopper->isActive() )
         return _hopper->channel();
 
     if ( !wioctl( SIOCGIWFREQ ) )
     {
         return -1;
     }
@@ -652,72 +675,69 @@ OChannelHopper* OWirelessNetworkInterface::channelHopper() const
     return _hopper;
 }
 
 
 void OWirelessNetworkInterface::setMode( const QString& mode )
 {
     if ( mode == "auto" )            _iwr.u.mode = IW_MODE_AUTO;
     else if ( mode == "adhoc" )      _iwr.u.mode = IW_MODE_ADHOC;
     else if ( mode == "managed" )    _iwr.u.mode = IW_MODE_INFRA;
     else if ( mode == "master" )     _iwr.u.mode = IW_MODE_MASTER;
     else if ( mode == "repeater" )   _iwr.u.mode = IW_MODE_REPEAT;
     else if ( mode == "secondary" )  _iwr.u.mode = IW_MODE_SECOND;
-    #if WIRELESS_EXT > 14
     else if ( mode == "monitor" )    _iwr.u.mode = IW_MODE_MONITOR;
-    #endif
     else
     {
         qDebug( "ONetwork: Warning! Invalid IEEE 802.11 mode '%s' specified.", (const char*) mode );
         return;
     }
     wioctl( SIOCSIWMODE );
 }
 
 
 QString OWirelessNetworkInterface::mode() const
 {
     if ( !wioctl( SIOCGIWMODE ) )
     {
         return "<unknown>";
     }
     switch ( _iwr.u.mode )
     {
         case IW_MODE_AUTO: return "auto";
         case IW_MODE_ADHOC: return "adhoc";
         case IW_MODE_INFRA: return "managed";
         case IW_MODE_MASTER: return "master";
         case IW_MODE_REPEAT: return "repeater";
         case IW_MODE_SECOND: return "secondary";
-        #if WIRELESS_EXT > 14
         case IW_MODE_MONITOR: return "monitor";
-        #endif
         default: assert( 0 ); // shouldn't happen
     }
 }
 
 
 void OWirelessNetworkInterface::setMonitorMode( bool b )
 {
     if ( _mon )
         _mon->setEnabled( b );
     else
         qDebug( "ONetwork(): can't switch monitor mode without installed monitoring interface" );
 }
 
 
 bool OWirelessNetworkInterface::monitorMode() const
 {
     qDebug( "dataLinkType = %d", dataLinkType() );
     return ( dataLinkType() == ARPHRD_IEEE80211 || dataLinkType() == 802 );
-    // 802 is the header type for PRISM - Linux support for this is pending...
+    //FIXME: 802 is the header type for PRISM - Linux support for this is pending...
+    //FIXME: What is 119, by the way?
 }
 
 
 void OWirelessNetworkInterface::setNickName( const QString& nickname )
 {
     _iwr.u.essid.pointer = const_cast<char*>( (const char*) nickname );
     _iwr.u.essid.length = nickname.length();
     wioctl( SIOCSIWNICKN );
 }
 
 
 QString OWirelessNetworkInterface::nickName() const
@@ -791,31 +811,92 @@ QString OWirelessNetworkInterface::SSID() const
     }
 }
 
 
 void OWirelessNetworkInterface::setSSID( const QString& ssid )
 {
     _iwr.u.essid.pointer = const_cast<char*>( (const char*) ssid );
     _iwr.u.essid.length = ssid.length();
     wioctl( SIOCSIWESSID );
 }
 
 
+int OWirelessNetworkInterface::scanNetwork()
+{
+    _iwr.u.param.flags = IW_SCAN_DEFAULT;
+    _iwr.u.param.value = 0;
+    if ( !wioctl( SIOCSIWSCAN ) )
+    {
+        return -1;
+    }
+
+    int timeout = 1000000;
+
+    qDebug( "ONetworkInterface::scanNetwork() - scan started." );
+
+    bool results = false;
+    struct timeval tv;
+    tv.tv_sec = 0;
+    tv.tv_usec = 250000; // initial timeout ~ 250ms
+    char buffer[IW_SCAN_MAX_DATA];
+
+    while ( !results && timeout > 0 )
+    {
+        timeout -= tv.tv_usec;
+        select( 0, 0, 0, 0, &tv );
+
+        _iwr.u.data.pointer = &buffer[0];
+        _iwr.u.data.flags = 0;
+        _iwr.u.data.length = sizeof buffer;
+        if ( wioctl( SIOCGIWSCAN ) )
+        {
+            results = true;
+            continue;
+        }
+        else if ( errno == EAGAIN)
+        {
+            qDebug( "ONetworkInterface::scanNetwork() - scan in progress..." );
+            #if 0
+            if ( qApp )
+            {
+                qApp->processEvents( 100 );
+                continue;
+            }
+            #endif
+            tv.tv_sec = 0;
+            tv.tv_usec = 100000;
+            continue;
+        }
+    }
+
+    qDebug( "ONetworkInterface::scanNetwork() - scan finished." );
+
+    if ( results )
+    {
+        qDebug( " - results are in!" );
+    }
+    else
+    {
+        qDebug( " - no results :(" );
+    }
+}
+
+
 bool OWirelessNetworkInterface::wioctl( int call, struct iwreq& iwreq ) const
 {
     int result = ::ioctl( _sfd, call, &iwreq );
     if ( result == -1 )
-        qDebug( "ONetworkInterface::wioctl (%s) call %d - Status: Failed: %d (%s)", name(), call, result, strerror( errno ) );
+        qDebug( "ONetworkInterface::wioctl (%s) call %d (0x%04X) - Status: Failed: %d (%s)", name(), call, call, result, strerror( errno ) );
     else
-        qDebug( "ONetworkInterface::wioctl (%s) call %d - Status: Ok.", name(), call );
+        qDebug( "ONetworkInterface::wioctl (%s) call %d (0x%04X) - Status: Ok.", name(), call, call );
     return ( result != -1 );
 }
 
 
 bool OWirelessNetworkInterface::wioctl( int call ) const
 {
     strcpy( _iwr.ifr_name, name() );
     return wioctl( call, _iwr );
 }
 
 
 /*======================================================================================
diff --git a/libopie2/opienet/onetwork.h b/libopie2/opienet/onetwork.h
index b170ea2..e1545dd 100644
--- a/libopie2/opienet/onetwork.h
+++ b/libopie2/opienet/onetwork.h
@@ -352,25 +352,25 @@ class OWirelessNetworkInterface : public ONetworkInterface
     virtual QString mode() const;
     /**
      * Setting the monitor mode on a wireless network interface enables
      * listening to IEEE 802.11 data and management frames which normally
      * are handled by the device firmware. This can be used to detect
      * other wireless network devices, e.g. Access Points or Ad-hoc stations.
      * @warning Standard wireless network drives don't support the monitor mode.
      * @warning You need a patched driver for this to work.
      * @note Enabling the monitor mode is highly driver dependent and requires
      * the proper @ref OMonitoringInterface to be associated with the interface.
      * @see OMonitoringInterface
      */
-    virtual void setMonitorMode( bool ); //FIXME: ==> setMode( "monitor" );
+    virtual void setMonitorMode( bool ); //FIXME: ==> setMode( "monitor" ); Use IW_MONITOR first, if this doesn't work, then use iwpriv!
     /**
      * @returns true if the device is listening in IEEE 802.11 monitor mode
      */
     virtual bool monitorMode() const;  //FIXME: ==> mode()
     /**
      * Set the channel hopping @a interval. An @a interval of 0 disables channel hopping.
      * @see OChannelHopper
      */
     virtual void setChannelHopping( int interval = 0 );
     /**
      * @returns the channel hopping interval or 0, if channel hopping is disabled.
      */
@@ -388,53 +388,62 @@ class OWirelessNetworkInterface : public ONetworkInterface
      */
     virtual QString nickName() const;
     /**
      * Invoke the private IOCTL @a command with a @number of parameters on the network interface.
      * @see OPrivateIOCTL
      */
     virtual void setPrivate( const QString& command, int number, ... );
     /**
      * @returns true if the interface is featuring the private IOCTL @command.
      */
     virtual bool hasPrivate( const QString& command );
     virtual void getPrivate( const QString& command ); //FIXME: Implement and document this
-
-    virtual bool isAssociated() const {}; //FIXME: Implement and document this
     /**
-     * @returns the MAC address of the Access Point if the
-     * device is in infrastructure mode. @returns a (more or less random) CELL
-     * address if the device is in adhoc mode.
+     * @returns true if the interface is associated to an access point
+     * @note: This information is only valid if the interface is in managed mode.
+     */
+    virtual bool isAssociated() const;
+    /**
+     * @returns the MAC address of the Access Point if the device is in infrastructure mode.
+     * @returns a (more or less random) cell ID address if the device is in adhoc mode.
      */
     virtual QString associatedAP() const;
     /**
      * Set the @a ssid (Service Set ID) string. This is used to decide
      * which network to associate with (use "any" to let the driver decide).
      */
     virtual void setSSID( const QString& ssid );
     /**
      * @returns the current SSID (Service Set ID).
      */
     virtual QString SSID() const;
+    /**
+     * Perform scanning the wireless network neighbourhood.
+     * @note: UNSTABLE API - UNDER CONSTRUCTION - DON'T USE!
+     */
+    virtual int scanNetwork();
 
   protected:
-    void buildChannelList();
+    void buildInformation();
     void buildPrivateList();
+    void dumpInformation() const;
     virtual void init();
     struct iwreq& iwr() const;
     bool wioctl( int call ) const;
     bool wioctl( int call, struct iwreq& ) const;
 
   protected:
     mutable struct iwreq _iwr;
     QMap<int,int> _channels;
+    struct iw_range _range;
 
   private:
     OChannelHopper* _hopper;
 };
 
 
 /*======================================================================================
  * OMonitoringInterface
  *======================================================================================*/
 
 
 class OMonitoringInterface
@@ -466,60 +475,66 @@ class OMonitoringInterface
 class OCiscoMonitoringInterface : public OMonitoringInterface
 {
   public:
     OCiscoMonitoringInterface( ONetworkInterface*, bool _prismHeader );
     virtual ~OCiscoMonitoringInterface();
 
     virtual void setEnabled( bool );
     virtual QString name() const;
     virtual void setChannel( int );
 
 };
 
+
 /*======================================================================================
  * OWlanNGMonitoringInterface
  *======================================================================================*/
 
+
 class OWlanNGMonitoringInterface : public OMonitoringInterface
 {
   public:
     OWlanNGMonitoringInterface( ONetworkInterface*, bool _prismHeader );
     virtual ~OWlanNGMonitoringInterface();
 
   public:
     virtual void setEnabled( bool );
     virtual QString name() const;
     virtual void setChannel( int );
 
 };
 
+
 /*======================================================================================
  * OHostAPMonitoringInterface
  *======================================================================================*/
 
+
 class OHostAPMonitoringInterface : public OMonitoringInterface
 {
   public:
     OHostAPMonitoringInterface( ONetworkInterface*, bool _prismHeader );
     virtual ~OHostAPMonitoringInterface();
 
   public:
     virtual void setEnabled( bool );
     virtual QString name() const;
  };
 
+
 /*======================================================================================
  * OOrinocoMonitoringInterface
  *======================================================================================*/
 
+
 class OOrinocoMonitoringInterface : public OMonitoringInterface
 {
   public:
     OOrinocoMonitoringInterface( ONetworkInterface*, bool _prismHeader );
     virtual ~OOrinocoMonitoringInterface();
 
    public:
     virtual void setChannel( int );
     virtual void setEnabled( bool );
     virtual QString name() const;
 
 };