udpclient.py

#!/usr/bin/env python
from twisted.internet.protocol import DatagramProtocol
import time
from twisted.internet import reactor
import sys                    
from socket import SOL_SOCKET, SO_BROADCAST

class DomIka(DatagramProtocol):
 

   def startProtocol(self):
      self.transport.socket.setsockopt(SOL_SOCKET, SO_BROADCAST, True)
      self.transport.write(str(sys.argv[1])+"\r\n", ("255.255.255.255", 12080))
      reactor.callLater(0.1, self.stop)

   def datagramReceived(self, data, (host, port)):
      print "%d -> received %r from %s:%d" % (time.time(), data, host, port)


   def stop(self):
      reactor.stop()

if __name__ == '__main__':
   from twisted.internet import reactor
   reactor.listenUDP(0, DomIka())
   reactor.run()