[Xorp-users] XORP + User Click

[Marko Zec]

On Friday 14 January 2005 22:02, Pavlin Radoslavov wrote:
...
> Myself I am not familiar enough with Click configurations to say
> whether it is possible to create user-level Click configuration that
> can pick-up the packets originated from the local host so they can
> be forwarded by user-level Click.


KernelTun() element could help in such scenarios, and should work for 
both receiving and sending packets from Click to the OS.  Here's an 
example config (pretty much useless, though):

rt :: LinearIPLookup(
                192.168.200.200/30 2,
                161.53.0.0/16 0,
                10.0.0.0/8 1
                );

kt :: KernelTun(10.1.2.3/24);

kt -> rt;

rt[0] -> Print("0") -> Discard;
rt[1] -> Print("1") -> Discard;
rt[2] -> Print("2") -> kt;


At least on FreeBSD, this will automatically instantiate a "tun" network 
interface in the kernel, and any packets sent down this interface will 
then show up in Click.

Hope this helps,

Marko