[sbrivio]

passt has been doing something similar for years (see https://passt.top/kvm_forum_2022.pdf pages 17, 18) and it's actually pretty fast (https://passt.top/#performance_1), even though it's not as resource-constrained as WolfIP.

We're finally adding multithreading (https://bugs.passt.top/show_bug.cgi?id=13) these days.