return err
	}
	if m.Op != r.Op() {
		return fmt.Errorf("unexpected response OP, want %v, got %v", r.Op(), m.Op)
	}
	_, err = r.UnmarshalMsg(m.Payload)
	return err
}

func (c *Connection) handleIncoming(ctx context.Context, conn net.Conn, req connectReq) error {
	c.connMu.Lock()
	c.debugInConn = conn
	c.connMu.Unlock()
	if c.blockConnect != nil {
		// Block until we are allowed to connect.
		<-c.blockConnect