#!/bin/sh

# Change to show your outside interface
INTERFACE="eth2"

case $1 in 
	config)
	    cat <<'EOM'
graph_title Monthly Bandwidth average
graph_vlabel Bytes
average.label current average
monthly.label monthly projection
average.info Your average bandwidth usage based on uptime
monthly.info Your projected monthly bandwidth usage based on uptime
graph_category network
graph_args  --base 1024 -l 0
graph_info This graph show your current average bandwidth usage and projected 30 day average based on your current consumption since the last reboot
average.warning 8.33
monthly.warning 250
EOM
	exit 0;;
esac


INPUT=`ifconfig $INTERFACE|grep bytes|awk '{print $2}'|sed s/bytes://g`
OUTPUT=`ifconfig $INTERFACE|grep bytes|awk '{print $6}'|sed s/bytes://g`

TOTAL=$(($INPUT+$OUTPUT))

UPTIME=`cat /proc/uptime | cut -d'.' -f1-1`
UPV=`echo "scale=3;$UPTIME/60/60/24"|bc`

DAILY=`echo "scale=3;$TOTAL/$UPV"|bc`
MONTHLY=`echo "scale=3;$DAILY*30"|bc`


echo "average.value $DAILY"
echo "monthly.value $MONTHLY"