[Twisted-Python] udp broadcast question

Gaspard, Bradley S BRADLEY.S.GASPARD at saic.com
Tue Oct 24 16:55:45 EDT 2006

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 ... perhaps 
not a twisted question.

-----Original Message-----
From: twisted-python-bounces at twistedmatrix.com on behalf of Gaspard, Bradley
Sent: Tue 10/24/2006 4:27 PM
To: twisted-python at 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 

>   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.


>     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
> -- 
> http://mail.python.org/mailman/listinfo/python-list

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