#!/bin/sh
# na vstupu ARP ve formatu "XXXXXXXXXXXX" nebo "XX:XX:XX:XX:XX:XX"

#pouziti :
# upravit - jedu poslepu
# arp -n |  arp_collision_last10bit.sh | uniq -d
# nebo ? arp -n | cut -b34-50 | tail -n +2 | arp_collision_last10bit.sh | uniq -d
read discard
header=$?
#echo "header=${header}"
while ( [ "0" = "${header}" ] ) ; do
#
	read IP VOID ARP VOID2
	header=$?
#	echo "${IP}  ${ARP}"
	A=`echo "${ARP}" | tr -d ":" | cut -b 10`
	B=`echo "${ARP}" |  tr -d ":" | cut -b 11-12`
	echo -n "${A}" | tr "0123456789abcdefABCDEF" "0123012301230123230123"
	echo -n "${B}" | tr "abcdef" "ABCDEF"
	echo "   ${ARP}  ${IP}"
done