#!/bin/sh

# Author: Christoph Galuschka <christoph.galuschka@chello.at>

#         Athmane Madjoudj <athmanem@gmail.com>

t_Log "Running $0 - TCPdump test to Default-GW with IPv4"

# Grabing Default-Router of eth0

IP=$(ip route list default | grep 'default via ')

regex='.*via\ (.*)\ dev.*'

if [[ $IP =~ $regex ]]

  then

  t_Log "Found Default-GW - starting tcpdump test"

  #Dumping 4 pings via eth0 to file

  FILE='/var/tmp/eth0_test.pcap'

  COUNT='4'

  tcpdump -q -n -p -i eth0 -w $FILE &

  # If we don't wait a short time, the first paket will be missed by tcpdump

  sleep 1

  ping -q -c $COUNT -i 0.25 ${BASH_REMATCH[1]} > /dev/null 2>&1

  sleep 1

  killall -s SIGINT tcpdump

  sleep 1

  # reading from file, for each ping we should see two pakets

  WORKING=$( tcpdump -r $FILE | grep -ci icmp )

  # The script will allways work, but if the log does not contain

  # what we expect, we will log it

  if [ $WORKING == $[COUNT*2] ]

    then

    ret_val=0

  else

    t_Log "ping to Default-Gateway droped pakets!! Only "$WORKING" of "$[COUNT*2]" entries were found!!"

    ret_val=1

  fi

else

  t_Log "No Default-GW found - skiping test"

  ret_val=0

fi

# Remove file afterwards

/bin/rm $FILE

t_CheckExitStatus $ret_val