#!/bin/sh

# Author: Christoph Galuschka <tigalch@tigalch.org>

#         Athmane Madjoudj <athmanem@gmail.com>

t_Log "Running $0 - TCPdump test IPv6 to lo"

# Grabing IPv6 address of lo to check if IPv6 is enabled

IP=$(ip addr list lo | grep 'inet6 ')

regex='\t*inet6\ (.*)\/.*'

if [[ $IP =~ $regex ]]

  then

  t_Log "IPv6 seems to be enabled - runing test"

  FILE='/var/tmp/lo_test6.pcap'

  COUNT='4'

  #Dumping ping6s to loopback to file

  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

  ping6 -q -c $COUNT -i 0.25 ::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 icmp6 )

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

    ret_val=0

  else

    t_Log "ping6 to loopback droped pakets!! This should not happen on loopback"

    ret_val=1

  fi

  # Remove file afterwards

  /bin/rm $FILE

else

  t_Log "IPv6 seems to be disabled - skipping test"

  ret_val=0

fi

t_CheckExitStatus $ret_val