Re: [lisp] Wireguard and LISP [Was: Virtual meeting]

[Dino Farinacci <[e-mail]>]

> I agree with both of your points, my concern was that the moment the data plane traffic hits user space we degrade performance. Not a problem though if we're just prototyping __

There are various forms of UDP tunneling implemented in the kernel. So adding a LISP header is a minor addition. Then you got IIDs in the data-plane.

> I'm trying to think of a solution that does not need to modify WG but I can't come up with any.  For example if we 

I don’t know what you mean. If you want a newer form of VPN support, you have to change the code.

> want to control the src UDP port that WG puts in the packets, we need a way to specify this, and I'm not aware you can do it (from userspace).

If you bind a UDP socket, you can select the source-port. And then you use that socket to send from. So for instance:

   sock = socket.socket(socket.AF_INET6, socket.SOCK_DGRAM)
   iid = port = 13000
   sock.bind((“0.0.0.0", int(port)))

And when you send a packet to RLOC 1.1.1.1:

   rloc = “1.1.1.1"
   sock.sendto(packet, (rloc, 4341))

Dino