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Hi,
First SO_REUSEADDR is not currently supported by
CVS HEAD (Christiian started something, but he has disable the code from
memory). "Broadcasting" to 239.255.225.250 is not the "best" _expression_, it's
more "multicasting". But, to send to 239.255.255.250:1900 (uPNP I suppose), you
don't have to bind to 239.255.255.250:1900, but to any:any. To hear the other
devices, you should use a second socket for that, binded to any:1900. Is it the
case? If yes, SO_REUSEADDR is not necessary to your project. But in all cases,
to process incoming multicast packets, you should use IGMP to inform you network
(switchs, routers...) to route to your target all packets "to 239.255.255.250".
But once these packets reach your target, if LWIP_IGMP=0, I don't know if
multicast packets are really processed.
There is a task open to include a support of
SO_REUSEADDR option, but not yet started...
----- Original Message -----
Sent: Saturday, September 01, 2007 8:10
PM
Subject: [lwip-users] SO_REUSEADDR
Just put in the new cvs code and
after removing some useless code I started trying to find out why some of my
code is not being called.
This is the problem, I am
broadcasting on 239.255.255.250:1900 and thats ok but I also need to listen
to the same address and port so I can hear the other devices announcing that
they are available, I get the raw packets but its lost on its way up the
chain?
Is this a known problem? Is there
any way around it?
Joolz
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