Re: [patch 3/4] Network namespaces: IPv4 FIB/routing in namespaces

Andrey Savochkin
2006-06-27T09:25:35Z

On Mon, Jun 26, 2006 at 10:05:14PM +0200, Herbert Poetzl wrote:
> On Mon, Jun 26, 2006 at 04:56:46PM +0200, Daniel Lezcano wrote:
> > Andrey Savochkin wrote:
> > >Structures related to IPv4 rounting (FIB and routing cache)
> > >are made per-namespace.
> >
> > How do you handle ICMP_REDIRECT ?
>
> and btw. how do you handle the beloved 'ping'
> (i.e. ICMP_ECHO_REQUEST/REPLY for and from
> guests?

I don't need to do anything special. They are just IP packets.
If packets are local in the current net namespace, they are delivered to
socket or handled by icmp_rcv.

Certainly, packet/raw sockets shouldn't see packets they aren't supposed to
see. For raw sockets, it implies making socket lookup aware of namespaces,
exactly like for TCP or UDP.

Andrey