"Marko Rauhamaa" <ma...@pacujo.net> wrote in message
news:8737y6cgp6....@elektro.pacujo.net...
"James Harris" <james.harri...@gmail.com>:
I agree with what you say. A zero-length UDP datagram should be
possible and not indicate end of input but is that guaranteed and
portable?
The zero-length payload size shouldn't be an issue, but UDP doesn't
make
any guarantees about delivering the message. Your UDP application must
be prepared for some, most or all of the messages disappearing without
any error indication.
In practice, you'd end up implementing your own TCP on top of UDP
(retries, timeouts, acknowledgements, sequence numbers etc).
The unreliability of UDP was not the case in point here. Rather, it was
about whether different platforms could be relied upon to deliver
zero-length datagrams to the app if the datagrams got safely across the
network.
James
--
https://mail.python.org/mailman/listinfo/python-list
