#!/bin/bash
if test "$1" = ""
  then IPBASE=192.168.1
  else IPBASE=$1
fi

if test "$2" = ""
  then LL=1
  else LL=$2
fi

if test "$3" = ""
  then UL=254
  else UL=$3
    if test $LL -gt $UL
      then echo Error: Lower Limit is greater that Upper Limit
      exit 1
    fi
fi

while test $LL -le $UL; 
    do IP=$IPBASE.$LL;
      if ping -c 1 -w 1 $IP> /dev/null;
         then IPRESULT=OCCUPIED;
         else IPRESULT=FREE;
      fi 
    echo "$IP $IPRESULT"
    LL=$(($LL+1));
done