On Sat, Oct 24, 2015 at 04:02:59PM +0200, Martin Pieuchot wrote:
> ...at least better than OpenBSD's source code.
>
> This diff gets rid of the horrible per-ifp autoconf'd-ndp only hoplimit.
> Alexander verified that this is not mandatory in the corresponding RFCs
> and what really matters is the per-PCB specified hop limit.
>
> See how this simplifies a lot of rt_ifp usages?
>
> Ok?
It is a SHOULD in RFC 4861 and we are OpenBSD and don't believe in
what those Cisco routers claim anyway.
Router Advertisement messages also contain Internet parameters such
as the hop limit that hosts should use in outgoing packets and,
optionally, link parameters such as the link MTU. This facilitates
centralized administration of critical parameters that can be set on
routers and automatically propagated to all attached hosts.
If the received Cur Hop Limit value is non-zero, the host SHOULD set
its CurHopLimit variable to the received value.
> + if (nd_ra->nd_ra_curhoplimit) {
> + /*
> + * Ignore it. The router doesn't know the size of the
> + * internet better than this source code.
> + */
> + }
s/size/diameter/ to quote RFC 2461 correctly
The value should be set to that current diameter of the Internet.
OK bluhm@
