Dotan Barak wrote:
In the following URL you can find a very simple example on how to use
multicast:
https://svn.openfabrics.org/svn/openib/trunk/contrib/mellanox/ibtp/gen2/userspace/useraccess/multicast_test/multicast_test.c
I seem to be missing v1.h on my OFED v1.2 nightly install, where can I
find it?
this test doesn't send an SA query (to get the multicast props) or an SA
multicast join (to make the SM configure the subnet to make the port
that this QP is attached to) to get the multicast messages.
This example will work on a back-to-back topology.
An alternative that I've had pretty good success with is to use the RDMA
CM. It uses an IP(v6) abstraction, does the SA queries/joins for you,
and also supports selection of an unused multicast address if you join
the '0' address (and port? not sure if its required, I always zero it).
Check out the 'mckey.c' example included with the RDMA CM source, it
will likely answer your questions.
Andrew
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