On Wed, 2 May 2007 05:55:28 -0400
"Dylan Taft" <[email protected]> wrote:
> I've been pulling my hair out for the past several hours trying to
> debug a program in wine. I'm currently on kernel 2.6.20.8. The
> problem was that I was not getting any broadcasts to 255.255.255.255
> on a UDP socket bound to 192.168.0.8 with SO_BROADCAST enabled.
>
> I was fiddling around a bit, broadcasts come in fine if the socket is
> bound to INADDR_ANY( 0.0.0.0), but if it's bound to 192.168.0.8
> nothing comes in. I did a packet sniff, and indeed packets were being
> sent out to 255.255.255.255 via another machine on the network. I
> wrote a quick test program that would bind a socket to the lan ip and
> wait for incoming data. I tested it on a windows machine and linux.
> The windows machine could pick up packets fine, my linux machine could
> not. Is this proper behavior? It's fudging up several games and
> things in the wine project.
>
> Does anyone else experience this? Thanks!
It seems you are expecting too much of SO_BROADCAST option.
http://www.opengroup.org/onlinepubs/009695399/functions/xsh_chap02_10.html
SO_BROADCAST :
Non-zero requests permission to transmit broadcast datagrams (SOCK_DGRAM sockets only).
Note this only handles the transmission of packets, not receiving them.
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