> Now I'm trying to find out how to add a new protocol, > transfer a datagram between a interface card and this > new protocol stack, and finally send this datagram to > user space. > Do you guys know where I could find any information > about how to do it to get me a start? maybe this might be helpful in your endeavours: www.unm.edu/~zhuwb/work/docs/addProto.htm kind regards anupam - : send the line "unsubscribe linux-net" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html