It's not, it's the `socket2` library. The standard sockets don't allow (ab)using actual `UdpSocket`s as a different kind of datagram socket.
Sure it does.
let f = std::fs::File::open("/dev/null").unwrap(); let f: std::os::fd::OwnedFd = f.into(); let socket: std::net::UdpSocket = f.into();
We're talking about UdpSocket: https://doc.rust-lang.org/stable/std/net/struct.UdpSocket.ht...
Sure it does.
This is really no different. In this example it's not even a socket.