[verroq]

So looking at the code for the Go implementation, it appears to be just a stream cipher encrypted version of SOCKS5 [1,2].

1. https://github.com/shadowsocks/shadowsocks-go/blob/master/sh...

2. https://github.com/shadowsocks/shadowsocks-go/blob/master/cm...

(Not the best code, a couple of race conditions in there)