"Istiod pod label selector")
	cmd.PersistentFlags().IntVar(&o.XdsPodPort, "xds-port", viper.GetInt("XDS-PORT"),
		"Istiod pod port")
	cmd.PersistentFlags().DurationVar(&o.Timeout, "timeout", time.Second*30,
		"The duration to wait before failing")
	cmd.PersistentFlags().StringVar(&o.XDSSAN, "authority", viper.GetString("AUTHORITY"),
		"XDS Subject Alternative Name (for example istiod.istio-system.svc)")

}

func describeMatch(match *route.RouteMatch) string {
	conds := []string{}
	if match.GetPrefix() != "" {
		conds = append(conds, fmt.Sprintf("%s*", match.GetPrefix()))
	}
	if match.GetPathSeparatedPrefix() != "" {
		conds = append(conds, fmt.Sprintf("PathPrefix:%s", match.GetPathSeparatedPrefix()))
	}
	if match.GetPath() != "" {
		conds = append(conds, match.GetPath())
	}
	if match.GetSafeRegex() != nil {

	}
	// We need to pass in a sorter, and the one used by `kubectl logs` is good enough.
	sortBy := func(pods []*corev1.Pod) sort.Interface { return podutils.ByLogging(pods) }
	timeout := 2 * time.Second
	if getFirstPodFunc == nil {
		getFirstPodFunc = polymorphichelpers.GetFirstPod
	}
	pod, _, err := getFirstPodFunc(client, namespace, selector, timeout, sortBy)
	if err != nil {

	wg := &WaitGroup{
		done: make(chan struct{}),
	}

	wg.Add(n)
	return wg, func() {
		select {
		case <-wg.C():
			return
		case <-time.After(time.Second):
			t.Fatal("Wait group timed out!\n")
		}
	}
}

func (wg *WaitGroup) Add(i int32) {
	select {
	case <-wg.done:
		panic("use of an already closed WaitGroup")
	default:
	}

		}
		responses = append(responses, response)
		if !all && len(responses) > 0 {
			break
		}
	}
	return responses, nil
}

// queryDebugSynczViaAgents sends a debug/syncz xDS request via Istio Agents.
// By this way, even if istioctl cannot access a specific `istiod` instance directly,
// `istioctl` can access the debug endpoint.

func compareConfResult(result, expected string, t *testing.T) {
	t.Helper()
	retry.UntilSuccessOrFail(t, func() error {
		return checkResult(result, expected)
	}, retry.Delay(time.Millisecond*10), retry.Timeout(time.Second*3))
}

// checkBinDir verifies the presence/absence of test files.
func checkBinDir(t *testing.T, tempCNIBinDir, op string, files ...string) error {
	t.Helper()
	for _, f := range files {

	v1 "k8s.io/api/core/v1"

	"istio.io/istio/pkg/monitoring"
	"istio.io/istio/pkg/spiffe"
	"istio.io/istio/pkg/zdsapi"
)

var (
	ztunnelKeepAliveCheckInterval = 5 * time.Second
	readWriteDeadline             = 5 * time.Second
)

var ztunnelConnected = monitoring.NewGauge("ztunnel_connected",
	"number of connections to ztunnel")

type ZtunnelServer interface {
	Run(ctx context.Context)

		if err != nil {
			t.Fatal(err)
		}
		if p.Annotations[constants.AmbientRedirection] == constants.AmbientRedirectionEnabled {
			return
		}
		time.Sleep(1 * time.Second)
	}
	t.Fatal("Pod not annotated")
}

func assertPodNotAnnotated(t *testing.T, client kube.Client, pod *corev1.Pod) {
	for i := 0; i < 5; i++ {

// sure the netns is closed eventually.
func assertNSClosed(t *testing.T, closed *atomic.Bool) {
	for i := 0; i < 5; i++ {
		if closed.Load() {
			return
		}
		time.Sleep(1 * time.Second)
	}
	t.Fatal("NS not closed")

		panic(err)
	}
	err = c.SetWriteDeadline(time.Now().Add(time.Second))
	if err != nil {
		panic(err)
	}
	c.Write(data)
}

func sendHello(c *net.UnixConn) {
	ack := &zdsapi.ZdsHello{
		Version: zdsapi.Version_V1,
	}
	data, err := proto.Marshal(ack)
	if err != nil {
		panic(err)
	}
	err = c.SetWriteDeadline(time.Now().Add(time.Second))
	if err != nil {
		panic(err)
	}
	c.Write(data)