tcp_transport.go
func (t *TCPStreamLayer) Addr() net.Addr {
	// Use an advertise addr if provided
	if t.advertise != nil {
		return t.advertise
	}
	return t.listener.Addr()
}
func (t *TCPStreamLayer) Addr() net.Addr {
	// Use an advertise addr if provided
	if t.advertise != nil {
		return t.advertise
	}
	return t.listener.Addr()
}
// Addr implements the net.Listener interface.