#!/usr/bin/python

import socket
import hashlib
import time

ip = "10.0.0.50"
port = 12345
s = socket.socket( socket.AF_INET, socket.SOCK_STREAM ) 
s.connect(( ip, port ))

try: 
  while True: 
    s.send( hashlib.sha256( socket.gethostbyname( socket.gethostname() ) ).hexdigest() ) 
    antwort = s.recv( 1024 ) 
    if antwort != hashlib.sha256( ip ).hexdigest():
      print "shutting down now..."
    time.sleep(10)
finally: 
  s.close()