Re: default route problem

[Roy Marples <roy marples name>]

Dan Williams wrote:
> On Thu, 2008-11-13 at 16:19 +0000, Roy Marples wrote:
> > Could you point me to that bug? I would like to ensure that dhcpcd works 
> > with the same criteria. I'm pretty sure it does, but only for CIDR routes.
> > But from the sounds of it, you could just construct the netlink message 
> > to say the host is directly on the link instead.
>
> Could you explain that idea a bit more?  I tried various methods with
> libnl to do this inside NM, but I don't fully understand the kernel
> routing table behavior in this situation.  The procedure for
> using /sbin/ip and libnl will be essentially the same, so if we can come
> up with a procedure that works in /sbin/ip it should be easy to convert
> to libnl.  Really, you just need to do something like:
>
> ifconfig eth0 192.168.1.30/32 up
> /sbin/ip route add default dev eth0 via 192.168.1.1

if (gateway->s_addr == INADDR_ANY)
     nlm->rt.rtm_scope = RT_SCOPE_LINK;

That's roughly what I use. But I bypass libnl and go straight to the kernel.

I'll double check with your code sample on my linux machine later.

Thanks

Roy