if err := m.authToken(cReq.Token); err != nil {
		writeErr(fmt.Errorf("auth token: %w", err))
		return
	}

	if debugPrint {
		fmt.Printf("handler: Got Connect Req %+v\n", cReq)
	}
	writeErr(remote.handleIncoming(ctx, conn, cReq))
}

// AuthFn should provide an authentication string for the given aud.
type AuthFn func() string

// ValidateAuthFn should check authentication for the given aud.

		}
		m.addResponse(Response{Err: ErrIncorrectSequence})
		return false
	}
	m.RecvSeq++
	return true
}

// response will send handleIncoming response to client.
// may never block.
// Should return whether the next call would block.
func (m *muxClient) response(seq uint32, r Response) {
	if debugReqs {
		fmt.Println(m.MuxID, m.parent.String(), "RESP")

		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