Function server

tests/net/v4.rs:18–43

(ready: Arc<(Mutex<u16>, Condvar)>)

const BUFFER_SIZE: usize = 20;

fn server(ready: Arc<(Mutex<u16>, Condvar)>) {
    let connection_socket = socket(AddressFamily::INET, SocketType::STREAM, None).unwrap();

    let name = SocketAddrV4::new(Ipv4Addr::new(127, 0, 0, 1), 0);
    bind(&connection_socket, &name).unwrap();

    let who = getsockname(&connection_socket).unwrap();
    let who = SocketAddrV4::try_from(who).unwrap();

    listen(&connection_socket, 1).unwrap();

    {
        let (lock, cvar) = &*ready;
        let mut port = lock.lock().unwrap();
        *port = who.port();
        cvar.notify_all();
    }

    let mut buffer = vec![0; BUFFER_SIZE];
    let data_socket = accept(&connection_socket).unwrap();
    let (nread, actual) = recv(&data_socket, &mut buffer, RecvFlags::empty()).unwrap();
    assert_eq!(String::from_utf8_lossy(&buffer[..nread]), "hello, world");
    assert_eq!(actual, nread);

    send(&data_socket, b"goodnight, moon", SendFlags::empty()).unwrap();
}

fn client(ready: Arc<(Mutex<u16>, Condvar)>) {
    let port = {