It does work when I specify the broadcast address of my wireless interface. I am still curious if one can specify on which interface to broadcast to 255.255.255.255 ... perhaps not a twisted question. -----Original Message----- From: twisted-python-bounces@twistedmatrix.com on behalf of Gaspard, Bradley S Sent: Tue 10/24/2006 4:27 PM To: twisted-python@twistedmatrix.com Subject: [Twisted-Python] udp broadcast question I found a udp broadcast example (below) which works fine for my wired ethernet interface but I would like to be able to specify my wireless interface (ath0) for the udp broadcast. How can this be done? On Wednesday, Dec 17, 2003, at 17:27 Europe/Helsinki, Jp Calderone wrote:

No threads, but maybe it's good enough anyway:

Thanks for trying to help. But really this is very incomplete, missing all read or write calls to the socket. And I've tried, with just that SO_BROADCAST option I do not receive the stuff I send, and in fact with just that option, I can't even send. But thanks for the pointer to twisted. Torsten

import sys from socket import SOL_SOCKET, SO_BROADCAST

from twisted.internet import reactor from twisted.internet import protocol from twisted.internet import task from twisted.python import log

log.startLogging(sys.stdout)

port = 7154

class BroadcastingDatagramProtocol(protocol.DatagramProtocol):

port = port

def startProtocol(self): self.transport.socket.setsockopt(SOL_SOCKET, SO_BROADCAST, True) self.call = task.LoopingCall(self.tick) self.dcall = self.call.start(1.0)

def stopProtocol(self): self.call.stop()

def tick(self): self.transport.write(self.getPacket(), ("<broadcast>", self.port))

def getPacket(self): return "Some bytes for you"

def datagramReceived(self, data, addr): print "Received", repr(data)

reactor.listenUDP(port, BroadcastingDatagramProtocol()) reactor.run()

Jp

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