This reminds me a bit of Aeron (https://github.com/real-logic/aeron https://github.com/real-logic/aeron) which is a reliable UDP uni/multicast transport library

This reminds me a bit of Aeron (https://github.com/real-logic/aeron https://github.com/real-logic/aeron) which is a reliable UDP uni/multicast transport library with built-in flow control. It's written in Java and seems to have superb performance (I haven't used it myself). Might be an interesting alternative if you don't want to write it all yourself.