Re: Proposal to automatically make the owner/user of an accepted socket the current process

> It makes sense to me to be able to use uid/gid as a selector in
> firewall rules.

It superficially seems to make sense.  But it gets messy when you
consider that multiple proceses with potentially different IDs may have
descriptors on a socket - and that linking network packets to sockets
is at least something of a layering violation to begin with.

If you want what most of this thread seems to think this is for (let
only user U handle traffic on port P), I think the time to do it is
connect()/accept(), possibly (depending on exactly what you want) with
related code in fork, set*id, and/or SCM_RIGHTS.  Maybe sosend() and
sorecv().

But not, I would say, per-packet filtering.

And, of course, I'm armchair quarterbacking here.  Whatever is
implemented here, it won't be by me.

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