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Re: How do I keep an inet6 address from being added to an interface?

> I've often wanted such a feature: a way to ensure that NetBSD's
> kernel neither sends or acts on *any* packet received on certain
> interfaces.

I added a handful of interface flags to 1.4T, and one of them was
BPFONLY; when set, packet reception short-circuits everything after
bpf.  Not quite what you want, because it affects input only.

The most difficult part was finding (and fixing) everything that
treated interface flags as a 16-bit bitmask; I can't believe it would
be all that hard to add to -current.

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