Re: setsockopt and IP_MULTICAST_LOOP

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From the Windows Embedded CE 6.0 Release Notes:

IP_MULTICAST_LOOP is not supported
The socket option IP_MULTICAST_LOOP is not supported on Windows Embedded CE
6.0. Any sockets that are listening for multicast traffic on an interface
will not receive multicast traffic sent from that interface.

Sorry for the confusion. This option was actually never really supported.
On CE, all multicast messages sent from a socket to a multicast group are
not received by the sender socket (or any other socket listening on that
same interface). You can buffer up the messages yourself and then
"receive" them within your own app or transmit them through another means
to other apps on the system.

I know this is kind of a pain in the ass. We will consider changing it for
future Windows CE versions.

Hope that helps,
Corey Burke
Windows CE Networking QA


.

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