Re: per-FIB socket binding

On Tue, 17 Dec 2024, Mark Johnston wrote:

> Lately I've been working on adding FIB awareness to bind(2) and inpcb lookup.
> Below I'll describe the project a bit.  Any feedback/comments/suggestions would
> be appreciated.
>
> Today, a TCP or UDP socket can receive connections or datagrams from any FIB.

SCTP?

> Any thoughts/comments?

How much use are FIBs still these days?  Half of the original use cases
I can think of could easily and better be overcome by using vnet jails
with a physical or virtual interface (e.g, vcc) being delegated to the
vnet.

I wonder if anyone on FreeBSD is using FIBs to actually have multi-FIB 
forwardig but that very little touches your use case apart from the mgmt
which again can be factored out better (or inversely, factoring out the
forwarding).

I would honestly know who and how FIBs are still in use today or if they
should be put on a list to be removed for 16 (I assume I might be
surprised).


That all said with your opt-in approach if the code itself doesn't bring
too many new complications I'd be happy with it (assuming FIBs still
have a use case).

/bz

-- 
Bjoern A. Zeeb                                                     r15:7