// the tls.Conn which is calling it.
type hairpinConn struct {
	net.Conn
	tlsConn *Conn
}

func (conn *hairpinConn) Close() error {
	conn.tlsConn.ConnectionState()
	return nil
}

func TestHairpinInClose(t *testing.T) {
	// This tests that the underlying net.Conn can call back into the
	// tls.Conn when being closed without deadlocking.
	client, server := localPipe(t)
	defer server.Close()
	defer client.Close()