// It should be 50% chance of any host initiating the connection.
func (c *Connection) shouldConnect() bool {
	// The remote should have the opposite result.
	h0 := xxh3.HashString(c.Local + c.Remote)
	h1 := xxh3.HashString(c.Remote + c.Local)
	if h0 == h1 {
		return c.Local < c.Remote
	}
	return h0 < h1
}

func (c *Connection) send(ctx context.Context, msg []byte) error {
	select {