Im not convinced it will be any smaller by the time your UDP code has dealt
with retransmits, out of order acks, and backoff.
> for the kernel-side code: once you have a fully-fledged IP stack, why not
> use it. There's no reason the server couldn't support both, and machines
> would just use whichever was more appropriate at the time.
The IP layer is easy. Thats about 30 lines of code for a minimal IP. You'll
need more code to implement ARP, which you will require
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