Strictly speaking, you can put any protocol on top of UDP, including a copy of TCP... But I took parent's question as "should I be using UDP sockets instead of

Strictly speaking, you can put any protocol on top of UDP, including a copy of TCP... But I took parent's question as "should I be using UDP sockets instead of TCP sockets". Once you invent your new protocol instead of UDP or on top of it, you can have any features you want.