Python sockets UDP broadcast multicast question??

[inorlando]

On Aug 28, 8:06 am, Francesco Bochicchio <bock... at virgilio.it> wrote:
> On 28 Ago, 08:09, inorlando <inorla... at gmail.com> wrote:
>
>
>
> > Hi all,
>
> > I have a question about python and sockets , UDP datagram in
> > particular. I'm new to socket programming so please bare with me.
>
> > I am trying to write a simple application that broadcast files to
> > another computer on the same network/subnet but I do not want the
> > receiver computer to have to respond, I only want it to receive the
> > packet.
>
> > So this was simple enough, but my problem is this when I send a file
> > that is say larger then 100K the receiver is not able to keep up with
> > the packets as they arrive. I get say 60 or so then the rest are
> > ignored.
>
> > I have tried a couple of different approaches like threading and
> > queuing,  but all ultimately have the same problem.
>
> > So my question is how can I receive a continuous stream of UDP packets
> > to some kind of buffer for processing with out losing packets?
>
> > Thank you for any help or guidance that you provide.
>
> > - InOrlando
>
> The UDP protocol is defined 'unreliable' because it cannot guarantee
> in all conditions
> the delivery of all packets in the correct sequence. This means than
> in specific conditions,  e.g.
> when the network or one of the communicating computers is overloaded,
> you can loose packets or
> receive them in the wrong order.
>
> So, first of all, if you cannon tolerate packet loss, consider
> switching the protocol to TCP.
> If you cannot change protocol (maybe because TCP has no multicast),
> then try to reduce the load on the
> computer and the network, e.g. by inserting a delay between two packet
> transmissions. But remember that
> this only reduce, does not cancel, the possibility of packet loss or
> packet mis-ordering.
>
> Of course, it could be a bug in your program, in which case none of
> the above matters ;)
>
> Ciao
> -----
> FB

Anyone else have any comments? Anything?