if err != nil {
		return nil, 0, err
	}

	port = ln.LocalAddr().(*net.UDPAddr).Port
	return ln, port, nil
}

// forceClose the given socket.
func forceClose(conn net.Conn) error {
	// Close may be called more than once.
	defer func() { _ = conn.Close() }()

	// Force the connection closed (should result in sending RST)

			go func() {
				select {
				case <-done:
					return
				case <-time.After(requestTimeout):
					epLog.WithLabels("id", id).Warnf("TCP forcing connection closed after request timeout")
					_ = forceClose(conn)
					return
				}
			}()
		}
	}()

	// Notify the WaitGroup once the port has transitioned to ready.
	go s.awaitReady(onReady, listener.Addr().String())

	return nil
}