#!/bin/sh
#set -xv

TMPFILE=/tmp/ifoctets.dat

SNMP_COMMUNITY=public
SNMP_HOST=localhost
SNMP_INDEX=1
SNMP_GET="/usr/local/bin/snmpget -c $SNMP_COMMUNITY -v 2c -Ov $SNMP_HOST ifInOctets.$SNMP_INDEX ifOutOctets.$SNMP_INDEX"

TIMEOUT=10
TIMEDELAY=60

THRESHOLD_IN=20240
THRESHOLD_OUT=25048

echo "Count    In Delta    Out Delta"

COUNT=$TIMEOUT
OCT_IN2=0
OCT_OUT2=0

while [ true ]; do
	let OCT_IN1=OCT_IN2 >/dev/null
	let OCT_OUT1=OCT_OUT2 >/dev/null

	$SNMP_GET | tr -s '\n' ' ' > $TMPFILE
	read C1 OCT_IN2 C2 OCT_OUT2 < $TMPFILE

	let OCT_IN=OCT_IN2-OCT_IN1 >/dev/null
	let OCT_OUT=OCT_OUT2-OCT_OUT1 >/dev/null

#	if [ ${OCT_IN-0} -le 0 -a ${OUT_OUT-0} -le 0 ]; then
	if [ ${OCT_IN-0} -lt $THRESHOLD_IN -a ${OUT_OUT-0} -lt $THRESHOLD_OUT ]; then
		let COUNT=COUNT-1 >/dev/null
	else
		COUNT=${TIMEOUT}
	fi

	printf " %.3d  %11d  %11d\n" $COUNT $OCT_IN $OCT_OUT

	[ $COUNT -le 0 ] && break || sleep $TIMEDELAY
done

echo "SHUTTING DOWN SERVER"
shutdown -p now