Oh I was having trouble because my fileno() method was not returning the correct descriptor. But I fixed it... Thanks for the excellent suggestion for improving performance! I've implemented that change. It works great! On Tue, Oct 1, 2013 at 5:38 AM, <exarkun@twistedmatrix.com> wrote:
On 07:30 am, dstainton415@gmail.com wrote:
Hi,
I'm trying to implement an IWriteDescriptor using raw sockets. So far this is what I wrote... but it doesn't work: https://github.com/david415/**hushTCP/blob/master/hush_**writer.py<https://github.com/david415/hushTCP/blob/master/hush_writer.py>
Am I doing something obviously wrong here?
I certainly am able to use raw socket + scapy correctly without Twisted.
Please describe the problem in more detail than "it doesn't work". >:) Your hush_writer.py is a good <http://sscce.org/> but it's still important to know how its behavior differs from your expectations.
As far as I can tell it does work - although there's one mistake that makes it a bit more inefficient than strictly necessary:
def doWrite(self): if len(self.packets) > 0: self.socket.sendto(self.**packets.pop(0), self.address) else: return
When you're out of packets you should remove the writer from the reactor. This version of the code will perpetually dispatch writeable notification (in the form of a doWrite call) to your object as fast as possible.
Once you fix this, don't forget to re-add the writer as soon as len(self.packets) rises above 0 again.
Jean-Paul
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