Hello,
I encountered some problems with TUDPBlockSocket.AddMulticast on a win 7 PC
with more than one network interface (IP). Using "0.0.0.0" did not work as
expected, so I had to bind one blocksocket per IP.
The line
Multicast.imr_interface.S_addr := INADDR_ANY;
is in my opinion wrong. If you bind the socket to a specific interface then
you have to use this interface also in this function.
I substituted it with
Multicast.imr_interface.S_addr := FLocalSin.sin_addr.S_addr;
which works now without problems.
Something similar has been reported here:
http://www.mail-archive.com/synalist-public@lists.sourceforge.net/msg03024.h
tml
Regards
Lars
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