#!/bin/sh
# @(#) $Id: arpfetch,v 1.6 2006/07/28 18:10:29 leres Exp $ (LBL)
#
# arpfetch - collect arp data from a cisco using net-snmp
#

export PATH="/usr/local/bin:${PATH}"

prog=`basename $0`

if [ $# -ne 2 ]; then
	echo "
Collect arp data for host from a cisco using snmpwalk.

Usage: $0 host cname

  host  .. the host to query
  cname .. the read/only snmp community name
"
	exit 1
fi

host="$1"
cname="$2"

what="ip.ipNetToMediaTable.ipNetToMediaEntry.ipNetToMediaPhysAddress"
#
# Get the data and convert it
#
snmpwalk -Oq -Os -v 1 -c ${cname} ${host} ${what} | 2>&1 tr A-Z a-z |
    awk '{
	    ip = $1
	    n = split(ip, a, ".")
	    if (n > 4)
		    ip =  a[n - 3] "." a[n - 2] "." a[n - 1] "." a[n]
	    ea = $2
	    print ea "\t" ip
    }'

rm -f ${t1}