[PATCH] babel: Ignore Hello TLVs with unicast flag set

[Toke Høiland-Jørgensen]

Toke Høiland-Jørgensen <toke at toke.dk> writes:

> RFC6126bis introduces a flags field for the Hello TLV, and adds a unicast flag
> that is used to signify that a hello was sent as unicast. This adds parsing of
> the flags field and ignores such unicast hellos, which preserves compatibility
> until we can add a proper implementation of the unicast hello mechanism.
>
> Signed-off-by: Toke Høiland-Jørgensen <toke at toke.dk>

I have a partial implementation of the unicast hello mechanism lying
around, but it is written before we agreed on the details, so it needs
to be updated.

I'll get around to that and send it along later, but for now this patch
at least guarantees that we are compatible with any other implementation
that does send unicast hellos.

-Toke