use std::net::UdpSocket;

const MESSAGE_SIZE: usize = 12;

fn main() {
    let socket = UdpSocket::bind("0.0.0.0:29803").expect("couldn't bind to address");
    loop {
        let mut buf = [0; MESSAGE_SIZE];
        match socket.recv_from(&mut buf) {
            Err(e) => eprintln!("Didn't receive data: {e}"),
            Ok((number_of_bytes, src_addr)) => {
                let filled_buf = &mut buf[..number_of_bytes];
                if number_of_bytes != MESSAGE_SIZE {
                    eprintln!("Ignoring short message ({number_of_bytes}) from {src_addr}");
                    continue;
                }
                println!("Got packet from {src_addr}: {filled_buf:?}");
            }
        }
    }
}