Re: problem with UDP broadcast on Windows XP

On Apr 10, 3:30 pm, Irmen de Jong <irmen.NOS...@xxxxxxxxx> wrote:
Hendrik van Rooyen wrote:
I am not sure if this is at all relevant - but I seem to recall seeing
something once that had a list of socket numbers, splitting them
between UDP & TCP - can the socket actually rx UDP?
Yeah, as I wrote: when I'm sending UDP packets to the port directly

on the server's IP address, it responds just fine.

It's just the broadcast packets that don't seem to arrive.
(sent to ('<broadcast>',9090) )

Steve Holden wrote:
It's most likely, I suspect without knowing to much about it, that the
service is stalling because of a failure to "pump" Windows messages.
Irmen, are you taking any action in your service to ignore Windows
messages that your service process receives?

Hm, seeing that it processes TCP and "directed" UDP packets just fine,
there shouldn't be a problem here?

No I'm not knowingly doing stuff that ignores windows messages...

(I could maybe put up the code if someone wants to take a look but
not right now. Need to rip a fair deal out - there's a lot of
other stuff in there that's not relevant to the problem.)

--Irmen

I would investigate Windows security settings as a likely culprit. My
guess is that you are running WinXP SP2 with the default security
policies, which are likely to prohibit such promiscuous behavior.

Here's a URL that may shed some light, it seems surprisingly
instructive for MS support: http://support.microsoft.com/kb/842242 -
Some programs seem to stop working after you install Windows XP
Service Pack 2

-- Paul


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