More hacking on my Lisp IP stack. Just got it to answer pings! Very exciting :-)

The code's a little untidy at the moment, but it's still down at 823 lines of hand-written code, and I'm pretty happy with that. I've left out everything not absolutely essential sofar, like routing, fragmentation, etc.

It also seems to me that the low-level internet protocols are a lot more straightforward than CORBA/HTTP/XML/Javathings/etc, and much better specified too. Maybe toy IP stacks could become suitable weekend-hacks like toy webservers are today - that would be pretty interesting!