bird 1.6 seems to ignore ipv6 kernel routes on 4.19

[Toke Høiland-Jørgensen]

Ondrej Zajicek <santiago at crfreenet.org> writes:

> On Wed, Aug 21, 2019 at 11:30:53PM +0200, Toke Høiland-Jørgensen wrote:
>> >> # ip r a 2001:db8:1:14::/64 via 2001:db8:1:1::14
>> >> # route -6 add 2001:db8:1:15::/64 gw 2001:db8:1:1::15
>> >
>> > This command uses the old ioctl(SIOCADDRT) API which in turn generates
>> >
>> >> none 2001:db8:1:15::/64 via 2001:db8:1:1::15 dev ve0 metric 1 pref medium
>> >
>> > with rtm_type == RTN_UNKNOWN (0), which is obviously wrong.
>> 
>> Looks like the kernel ioctl handler will copy the type if userspace sets
>> it:
>> 
>> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/net/ipv6/route.c#n4271
>> 
>> but 'route' doesn't set it:
>> 
>> https://sourceforge.net/p/net-tools/code/ci/master/tree/lib/inet6_sr.c
>
> Hi
>
> Thanks, i am wondering if that is a change in kernel, route command,
> or just nobody noticed it before.

A bit of git archaeology points suggestively at this commit:
https://git.kernel.org/torvalds/c/e8478e80e5a

>From April 2018; so looks like it might actually be a regression in the
kernel. I'll send a bug report to netdev...

-Toke