klibc - Oct 2023 - ipconfig: fails to add default gateway

With netmask 255.255.255.255 (or probably 255.255.255.254 to work
around the earlier bug) and a gateway that?s totally out of network
(not even the first bit is identical), which, yes, is a totally shit
setup by a VM provider, adding the route fails.

Looking at ifupdown, this is almost certainly the same as #378506
from 2006 which was fixed by ?forcing the gateway onlink?.

This seems to boil down to just call ip(8) with that flag. Which?
? does things. I guess.

Without claiming to understand *anything* about this, it seems like
ip(8) uses a different way of communicating routes to the kernel from
classic SIOCADDRT in ipconfig, and the latter cannot set the onlink
flag, nor does the kernel add it on translation. Ugh.

(I will probably have to see how I can rip ipconfig off initramfs-tools
and plug iproute2 in (YAAAAY! (NOT!)) since I also got a v6-only machine
and the ?ip=? kernel parameter is Legacy IP-only. Unless both are solved
problems already. I could use v6 for this machine, too, if that would
be easier.)

bye,
//mirabilos (one of those people who remember their 3FFE:: addresses)
-- 
15:39??mika:#grml? mira|AO: "mit XFree86? w?r? das nicht passiert" -
muhaha
15:48?<thkoehler:#grml> also warum machen die xorg Jungs eigentlich alles
kaputt? :)    15:49?<novoid:#grml> thkoehler: weil sie als Kinder nie den
gebauten Turm selber umschmeissen durften?	-- ~/.Xmodmap wonders?

Dixi quod?
>(I will probably have to see how I can rip ipconfig off initramfs-tools
>and plug iproute2 in (YAAAAY! (NOT!)) since I also got a v6-only machine
>and the ?ip=? kernel parameter is Legacy IP-only. Unless both are solved
>problems already. I could use v6 for this machine, too, if that would
>be easier.)
And that would be Debian #627164 from 2011.

Damn, I guess this means I?ll have to hack this up myself, perhaps
with https://gist.github.com/zajdee/65aad61f35d3a63c56c7d1cc76c22e14
or something as base (but also teardown, this is for dropbear only).

(Adding this mostly for thread completeness, as the only thing of
this that pertains to klibc would be lack of IPv6 support and lack
of ?onlink? flag support for a Legacy IP default route.)

Good night,
//mirabilos
-- 
22:20?<asarch> The crazy that persists in his craziness becomes a master
22:21?<asarch> And the distance between the craziness and geniality is
only measured by the success 18:35?<asarch> "Psychotics are
consistently
inconsistent. The essence of sanity is to be inconsistently inconsistent