Re: [PATCH 0/10] af_unix: add multicast and filtering features to AF_UNIX

From: Javier Martinez Canillas <redacted>
Date: Thu, 01 Mar 2012 14:56:11 +0100

We could use AF_INET multicast on a local machine but we need some
ordering and control flow requirements that are not guaranteed on UDP
multicast over IP. That's why we thought to add a new address family
AF_MCAST.

None of this makes any sense to me.

Unless you have infinite amounts of memory you have to handle packet
drops, and the same things that handle packet drops on a protocol
level can handle out-of-order delivery too.

Stop reinventing the wheel, use facilities that exist already.