Cygwin 1.5.18: Problem using setsockopt() for multicast
Brian Ford
Brian.Ford@flightsafety.com
Thu Aug 17 17:13:00 GMT 2006
On Thu, 17 Aug 2006, Alessandro Saffiotti wrote:
> On Thu, 17 Aug 2006, Brian Ford wrote:
> > Oh yeah, you must call the setsockopt below after the bind on windows.
> > Search MSDN for why.
>
> Thanks a lot, this actually fixed my problem.
You're welcome. Sorry for the initial noise.
> In case it may help someone else: I also need to make the socket
> reusable by
>
> setsockopt(tcp_broadcast_receiver, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)
I've never had to do that, so it must be an issue with your code that
requires it to be reusable.
> and I have found that this, contrary to the IP_ADD_MEMBERSHIP case,
> must be called BEFORE I bind the socket!
Um, that makes sense, doesn't it?
--
Brian Ford
Lead Realtime Software Engineer
VITAL - Visual Simulation Systems
FlightSafety International
the best safety device in any aircraft is a well-trained crew...
.
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