1 files changed, 3 insertions, 0 deletions

diff --git a/noncore/settings/networksettings/wlan/wextensions.cpp b/noncore/settings/networksettings/wlan/wextensions.cpp
index 16654bb..827d075 100644
--- a/noncore/settings/networksettings/wlan/wextensions.cpp
+++ b/noncore/settings/networksettings/wlan/wextensions.cpp
@@ -91,24 +91,27 @@ double WExtensions::frequency(){
   return 0;
 }
 
 /**
  * Get the channel that the interface is running at.
  * @return int the channel that the interfacae is running at.
  */ 
 int WExtensions::channel(){
   if(!hasWirelessExtensions)
     return 0;
   if ( 0 != ioctl( fd, SIOCGIWFREQ, &iwr ))
     return 0;
+  
+  // http://www.elanix.com/pdf/an137e.pdf
+
   double num = (double( iwr.u.freq.m ) * pow( 10, iwr.u.freq.e ) / 1000000000);
   double left = 2.401;
   double right = 2.416;
   for(int channel = 1;  channel<= 15; channel++){
     if( num >= left && num <= right )
       return channel;
     left += 0.005;
     right += 0.005;
   }
   qDebug(QString("Unknown frequency: %1, returning -1 for the channel.").arg(num).latin1());
   return -1;
 }