defaultInitialConnWindowSize       = 1024 * 1024 // default gRPC InitialWindowSize
	defaultInitialWindowSize           = 1024 * 1024 // default gRPC ConnWindowSize
)

// ClientOptions returns consistent grpc dial options with custom dial options
func ClientOptions(options *istiokeepalive.Options, tlsOpts *TLSOptions) ([]grpc.DialOption, error) {
	if options == nil {
		options = istiokeepalive.DefaultOption()
	}

	if err != nil {
		return nil, fmt.Errorf("could not dial: %w", err)
	}
	err = adscConn.Run()
	if err != nil {
		return nil, fmt.Errorf("ADSC: failed running %v", err)
	}

	err = adscConn.Send(dr)
	if err != nil {
		return nil, err
	}
	response, err := adscConn.WaitVersion(opts.Timeout, dr.TypeUrl, "")
	return response, err
}

// DialOptions constructs gRPC dial options from command line configuration

		// a better possible long term solution.

		deadline := time.Now().Add(time.Second * 10)
		nextSleep := 10 * time.Millisecond
		for i := 0; ; i++ {
			c, err := tls.Dial("tcp", "google.com:443", nil)
			if err == nil {
				c.Close()
				break
			}
			nextSleep = nextSleep * time.Duration(i)
			if time.Until(deadline) < nextSleep {

		if len(cfg.TLSClientConfig.ServerName) == 0 {
			cfg.TLSClientConfig.ServerName = serverName
		}

		delegateDialer := cfg.Dial
		if delegateDialer == nil {
			var d net.Dialer
			delegateDialer = d.DialContext
		}
		cfg.Dial = func(ctx context.Context, network, addr string) (net.Conn, error) {
			if addr == host {

		return fmt.Errorf("%s: %w", errStr, err)
	}

	if errStr != "" {
		return errors.New(errStr)
	}

	return nil
}

// Dial establishes the gRPC communication with the picked up plugin socket. https://godoc.org/google.golang.org/grpc#Dial
func dial(unixSocketPath string, timeout time.Duration) (registerapi.RegistrationClient, *grpc.ClientConn, error) {
	ctx, cancel := context.WithTimeout(context.Background(), timeout)

			if err := ls.buildup(handler); err != nil {
				t.Fatal(err)
			}
			if ls.Listener.Addr().Network() != network {
				t.Fatalf("got %s; want %s", ls.Listener.Addr().Network(), network)
			}

			c, err := Dial(ls.Listener.Addr().Network(), ls.Listener.Addr().String())
			if err != nil {
				t.Fatal(err)
			}
			defer c.Close()
			if c.LocalAddr().Network() != network || c.RemoteAddr().Network() != network {

			// So http2.Transport doesn't complain the URL scheme isn't 'https'
			AllowHTTP: true,
			// Pretend we are dialing a TLS endpoint. (Note, we ignore the passed tls.Config)
			DialTLSContext: func(ctx context.Context, network, addr string, _ *tls.Config) (net.Conn, error) {
				return newDialer(cfg).Dial(network, addr)
			},
		}
	}
	closeFn := func(conn *http2.Transport) func() {
		return conn.CloseIdleConnections
	}

	q.Enqueue(types.UID("foo4"), 1*time.Minute)
	expected := []types.UID{types.UID("foo1"), types.UID("foo2")}
	compareResults(t, expected, q.GetWork())
	compareResults(t, []types.UID{}, q.GetWork())
	// Dial the time to 1 hour ahead.
	clock.Step(time.Hour)
	expected = []types.UID{types.UID("foo3"), types.UID("foo4")}
	compareResults(t, expected, q.GetWork())
	compareResults(t, []types.UID{}, q.GetWork())
}

	subProcess.Stderr = &b

	if err := subProcess.Start(); err != nil {
		t.Log(b.String())
		t.Fatal(err)
	}
	defer subProcess.Process.Kill()

	var conn net.Conn
	for {
		var err error
		conn, err = net.Dial("tcp", host)
		if err == nil {
			break
		}
		time.Sleep(500 * time.Millisecond)
	}
	defer conn.Close()

	payload := []byte("foobar")
	if _, err := conn.Write(payload); err != nil {
		t.Fatal(err)
	}

			continue
		}

		c1, err := ListenPacket(tt.net, tt.addr1)
		if err != nil {
			t.Fatal(err)
		}
		defer closer(c1, tt.net, tt.addr1, tt.addr2)
		c1.LocalAddr()

		c2, err := Dial(tt.net, c1.LocalAddr().String())
		if err != nil {
			t.Fatal(err)
		}
		defer c2.Close()
		c2.LocalAddr()
		c2.RemoteAddr()

		if _, err := c2.Write(wb); err != nil {
			t.Fatal(err)
		}