#!/bin/sh
# Petr Simandl www.simandl.cz
# listing of all possible channels of given wifi card
# License : GPL

version="0.0.2"

chmin=1
chmax=240

if [ "$1 x" = " x" ]
    then
      echo "Missing interface name"
      echo "Usage: $0 <interface>"
      exit 1
    else
      iface=$1
fi

a_lch()
{ for channel in `seq $chmin $chmax`
  do
    iwconfig $iface channel $channel 2>/dev/null && ( echo -n "	Channel " ; echo -n "$channel : " ; \
    iwlist $iface freq 2>/dev/null | grep Freq | sed 's/Current Frequency://' | sed 's/GHz//' | awk '{print $1" GHz"}'
    ) 
  done

}

for mode in `seq 0 3`
do 
  echo "mode : $mode"
  iwpriv $iface mode $mode > /dev/null
  a_lch
done

exit 0