FreeBSD as multicast router

[Bjoern A. Zeeb]

On 8 Nov 2019, at 22:55, Mike Karels wrote:

> They are already exported via sysctl, and fetched that way on a live
> system.  But netstat was stupidly insisting that _mrtstats have a value
> in the namelist first.

Oh DOH!

> That is not true if ip_mroute was loaded as a
> module, and also if VNET was defined.  The fix is not to complain or quit
> unless sysctl fails, or if operating on a core file and _mrtstat is
> not found.
>
> When I'm happy with the patch, I'll put it in review.

Great; sign me up for review.


> I haven't checked
> yet how other functions deal with VNET (if at all) in a core file.

libkvm knows about vnets to some extend.  The answer probably is “badly”.

/bz