simple wifi radar

Preso un pezzo qua un pezzo là, adattato un pochetto.
Testato con driver ath5k e ipw2200
Notare che driver diversi danno output un po’ diversi di iwlist, almeno questi due.

#!/bin/bash
# Usage: /bin/bash this-script.sh <wireless-iface>
 
IFACE=$1
a=0
b=0
c=0
d=0
e=0
x=0
 
getWifi() {
while read line; do
   case $line in
    *ESSID*)
        line=${line#*ESSID:}
        essid[$a]=${line//\"/}
        (( a++ ))
        ;;
    *Address*)
        line=${line#*Address:}
        address[$b]=$line
        (( b++ ))
        ;;
    *Frequency*)
        line=${line#*Channel }
        channel[$c]=${line//\)/}
        (( c++ ))
        ;;
    *Quality*)
        line=${line#*Quality=}
        quality[$d]=${line// */}
        (( d++ ))
        ;;
    *Encryption*)
        line=${line#*Encryption}
        encryption[$e]=${line//key:/}
        (( e++ ))
        ;;
   esac
done < <(sudo iwlist $IFACE scan)
 
   WIFI=( "MAC Quality Channel Encryption ESSID" "----------------- ------- ------- ---------- ------------" )
 
   while [ $x -lt ${#essid[@]} ]; do
        WIFI+=( "${address[$x]} ${quality[$x]} ${channel[$x]} ${encryption[$x]} ${essid[$x]}" )
        (( x++ ))
   done
}
 
sudo ifconfig $IFACE up
 
while true; do
        getWifi
        clear
        echo
        printf "%s\n" "${WIFI[@]}" | column -t
        echo
        unset WIFI
        sleep 3
done