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AF_UNIX sockets don't do multi-cast. AF_INET sockets don't do FD passing or credentials. There was a patch to add an AF_BUS socket family some years ago that
by the_why_of_y 10y ago
AF_UNIX sockets don't do multi-cast.
AF_INET sockets don't do FD passing or credentials.
There was a patch to add an AF_BUS socket family some years ago that sounded like a pretty general solution but the network maintainer said "over my dead body".
http://lwn.net/Articles/504970/ http://lwn.net/Articles/504970/