I wrote a ip stack for my little toy OS a few years back and even that experience is miserable and hard. It never works quite right because either your implemen

I wrote a ip stack for my little toy OS a few years back and even that experience is miserable and hard. It never works quite right because either your implementation sucks or the people you're talking to are fast and loose with standards. More often both. It taught me though that the papers don't matter and the real standards are what's in the wild, and that what's happening in the wild is an order of magnitude more insane than you can imagine.