Advertise IPs as single regardless of prefix

[Maria Matejka]

Hello Anthony,

> Currently, I'm using a dummy interface and adding the IPs they own as
> v4 /32 and v6 /128 and in combination with an export filter to only
> export /32 and /128 prefixes, this works great.
> 
> However, I was wondering if there is a way to configure BIRD so that
> for the IPs configured on the host it supplants the configured prefix
> with /32 and/or /128 allowing me to eliminate the dummy interface?

I think this would be quite an easy extension to the Direct protocol,
something like the attached patch, adding the `self` option to it.

Disclaimer: This patch is atop `master` (which I happened to have
checked out) and not much tested, just fastcoded, completely
undocumented, and definitely not stable.

Maria

-- 
Maria Matejka (she/her) | BIRD Team Leader | CZ.NIC, z.s.p.o.
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