Script to check traffic on network wise interface

Script to check traffic on network wise interface 

#!/bin/bash

######

#Created by Shankar Patel

#Create date : 21-11-2011

################################################################################

function help {

echo "The plugin will chekc the range of ip network.

Usage:

$0 <ip_network_range>

Please provide ip range as a argument.

examples:

$0 172.19

OK. sto: eth0 [up] | traffic_mit=1mb "

exit 3;

}

if [ "$1" = "" ]; then help ; fi

ipaddrs="$1"

interface=`ip addr | grep -v 'lo:' | grep $ipaddrs | grep 'scope global' |sed 's/ \+/ /g' | awk '{print $5$7$8}' | sed 's/secondary//g' | sed 's/scope//g' | cut -d':' -f1 | uniq`

DATA_DIR=`/usr/bin/dirname $0`

DATA_FILE=$DATA_DIR"/.iftraffic"_$interface"_"$1

input_data() {

NEW_DATA=$CUR_CHK_TIME":"$TOT_IN_MB":"$TOT_OUT_MB

echo $NEW_DATA > $DATA_FILE

chown nagios:nagios $DATA_FILE 2>/dev/null

}

exit_out() {

input_data

CUR_IN_MB=`echo "$TOT_IN_MB-$LAST_IN_MB" | bc`

CUR_OUT_MB=`echo "$TOT_OUT_MB-$LAST_OUT_MB" | bc `

echo "OK. $msg: $interface [up] | traffic_"$msg"_in="$CUR_IN_MB"MB traffic_"$msg"_out=$CUR_OUT_MB"MB

# echo $TOT_IN_MB $(($CUR_IN_MB/$(($CUR_CHK_TIME-$LAST_CHK_TIME))))

# echo $TOT_OUT_MB $(($CUR_OUT_MB/$(($CUR_CHK_TIME-$LAST_CHK_TIME))))

}

ip1=$(echo $ipaddrs | awk -F'.' '{print $1}')

ip2=$(echo $ipaddrs | awk -F'.' '{print $2}')

if [ "$ip1" -eq 172 ]; then

case $ip2 in

17)

msg="blr";;

18)

msg="adi";;

19)

msg="del";;

30)

msg="mum";;

esac

else

echo "UNKNOWN. ip range not found in plugin."

exit 3;

fi

old_data_fetch() {

if [ "`grep ':$' $DATA_FILE 1> /dev/null ;echo $?`" = "0" ] || [ "`grep '::' $DATA_FILE 1> /dev/null ;echo $?`" = "0" ]

then

input_data

fi

LAST_CHK_TIME=`cat $DATA_FILE | sed 's/:/ /g' | awk '{print $1}'`

LAST_IN_MB=`cat $DATA_FILE | sed 's/:/ /g' | awk '{print $2}'`

LAST_OUT_MB=`cat $DATA_FILE | sed 's/:/ /g' | awk '{print $3}'`

}

new_data_fetch() {

netstat -i > /tmp/.net_data

CUR_CHK_TIME=`date +%s`

if [ "$LAST_IN_MB" = "" ] ; then LAST_IN_MB=0 ; fi

if [ "$LAST_OUT_MB" = "" ] ; then LAST_OUT_MB=0 ; fi

MTU_D=`cat /tmp/.net_data | grep "$interface "| awk '{print $2}'`

BITS_D=`cat /tmp/.net_data | grep "$interface "| awk '{print $4}'`

CUR_IN_BIT=$(($MTU_D*$BITS_D))

TOT_IN_KB=$(($CUR_IN_BIT/8192))

TOT_IN_MB=`echo "scale=3 ; $TOT_IN_KB/1024" | bc`

BITS_D=`cat /tmp/.net_data | grep "$interface "| awk '{print $8}'`

CUR_OUT_BIT=$(($MTU_D*$BITS_D))

TOT_OUT_KB=$(($CUR_OUT_BIT/8192))

TOT_OUT_MB=`echo "scale=3 ;$TOT_OUT_KB/1024" | bc`

}

new_data_fetch

if [ ! -f $DATA_FILE ] ; then

input_data

echo "OK. Saving Initial values to File."

exit 0

fi

old_data_fetch

exit_out