From: https://github.com/moby/vpnkit commit 2ffc1dd8a84ea7359dd09b1f4b51bb728d4f46a0 c/vpnkit-tap-vsockd/protocol.h c/vpnkit-tap-vsockd/protocol.c
From: https://github.com/moby/vpnkit commit 2ffc1dd8a84ea7359dd09b1f4b51bb728d4f46a0 c/vpnkit-tap-vsockd/protocol.h c/vpnkit-tap-vsockd/protocol.c