Python sockets UDP broadcast multicast question??

[castironpi]

On Aug 28, 1:09 am, 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

I am rusty on those.  AIR as I recall, if you use UDP, you need to
coordinate with the sender what packets you receive and what you don't
by use of 'ACK' packets that acknowledge a packet is received.  The
sender resends any packets that it hasn't received an ACK for.

If you want guaranteed receipt, you have to use TCP, as Francesco
stated.  Still, when transmitting, the 'send' command doesn't
guarantee its entire contents are sent.  It returns the length that
was transmitted, and you must try again with the remaining contents
continuously.