IPSec restart

#!/bin/bash
server_ip="10.0.5.1"
client_ip="10.0.5.50"
max_errors=3
time_ping=3
time_sleep=10
time_sleep_routes=5
inited=false

#now remove default route and only one to the vpn server
ip route del default
ip route add xxx.xxx.xxx.xxx via 172.24.127.17


restart_tunnel()
{
  shutdown_tunnel

  #invoke-rc.d ipsec restart
  /etc/init.d/ipsec restart
  sleep 3
  #invoke-rc.d xl2tpd restart
  /etc/init.d/xl2tpd restart
  sleep 3
  ipsec auto --up L2TP-PSK
  echo "c vpn-sf14" > /var/run/xl2tpd/l2tp-control

  # now we have to wait a few secs to exchange the default-routes
  sleep 5
  ip route add default via 10.0.5.1
}

shutdown_tunnel()
{
  /etc/init.d/ipsec stop
  /etc/init.d/xl2tpd stop
  echo "Tunnel was shut down"
}


fail_count=0
packet_count=0
while :
do
  packet_count=`ping $server_ip -c 1 -w $time_ping | grep -E -o '[0-9]+ received' | cut -f1 -d' '`

  if [ "$packet_count" != "1" ] ; then
    fail_count=$((fail_count+1))
  fi

  if [ $fail_count -eq $max_errors ] ; then
    echo "Fail-count reached, restarting tunnel"
    fail_count=0
    restart_tunnel
  fi

  echo $fail_count
  sleep $time_sleep
done