On Thu, Aug 10, 2017 at 4:29 PM, Jason A. Donenfeld <Jason@zx2c4.com> wrote:
> It seems like the problem you're facing is that B does not belong to
> I, because B belongs to an unrouted dummy0 interface. The solution
> would be to change the question of step 4 to instead ask if _any_
> interface contains B, not just the returned interface I. While this is
> essentially what's done for IPv6, I'm not certain this is the correct
> behavior for IPv4.

This looks like http://ix.io/z3d if you want to try it and report back.

Jason