Or network namespaces? User-space tcp might also make it easier to do tcp checkpoint restore and container/app migration. Interesting write-up. I keep thinking

Or network namespaces? User-space tcp might also make it easier to do tcp checkpoint restore and container/app migration. Interesting write-up. I keep thinking of the nightmare of keeping up with the world of Internet middleboxens, broken net layer implementations and icmp hacks that the Linux kernel supports and makes 'just work'. The jump to usermode tcp seems interesting if you're not worried about that (and I've been watching the formal-proven ip/tcp stack space like a hawk for years), but I've been burned so many times with non standard stacks and 'oh you need to connect to that non-updated lynxos system and huh' or 'hah could you enable ecn or this obscure tcp option because... Legacy?'... And sometimes I need tc/netem and netlink and I don't know...