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    SubjectRe: [PATCH 0/10] af_unix: add multicast and filtering features to AF_UNIX
    On 03/01/2012 05:02 PM, Luiz Augusto von Dentz wrote:
    > Hi Javier,
    > On Thu, Mar 1, 2012 at 3:56 PM, Javier Martinez Canillas
    > <> wrote:
    >>> Anyway, if you think multicast sockets is the way to go, then you could
    >>> setup a virtual network just to be able to use AF_INET multicast.
    >>> Thats probably doable without kernel patching.
    >> 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.
    > I don't want to sound like a broken record, but Im afraid I have to,
    > what about Ancillary Messages, how you are going to support passing
    > fd? Actually the whole virtual network sounds like a bad idea, are we
    > going to give ips to each and every application connected to the bus,
    > actually it is necessary to have one virtual network for each bus.
    > Contrary to someones believes I don't think AF_INET is that fast (e.g.

    You are right. Ancillary messages are PF_UNIX specific and also some
    D-bus applications use fd passing for out-of-band communication. So,
    using multicast on AF_INET will break these applications.


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