#!/usr/bin/python

import socket
import hashlib

ip = "10.0.0.50"
port = 12345

s = socket.socket( socket.AF_INET, socket.SOCK_STREAM ) 
s.bind(( ip, port )) 
s.listen( 1 )

try:
  while True: 
    komm, addr = s.accept() 
    while True: 
      data = komm.recv( 1024 )
      if not data: 
        komm.close() 
        break
      antwort = ( hashlib.sha256( socket.gethostbyname( socket.gethostname() ) ).hexdigest() if hashlib.sha256( addr[0] ).hexdigest() == data else hashlib.sha256( "ERROR" ).hexdigest() )
      komm.send( antwort ) 
finally: 
  s.close()