#!/bin/sh

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

#         Athmane Madjoudj <athmanem@gmail.com>

t_Log "Running $0 - TCPdump test to lo"

#Dumping pings to loopback to file

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

COUNT='4'

tcpdump -q -n -p -i lo -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 0.25 127.0.0.1

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 )

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

  then

  ret_val=0

else

  t_Log "ping to loopback droped pakets!! This should not happen on loopback"

  ret_val=1

fi

# Remove file afterwards

/bin/rm $FILE

t_CheckExitStatus $ret_val