fi

  # Try wget.
  if command -v wget > /dev/null; then
    DOWNLOAD_COMMAND="wget -qO -"
    return
  fi
  echo wget is not installed.

  echo Error: curl is not installed or does not support https, wget is not installed. \
       Cannot download envoy. Please install wget or add support of https to curl.
  exit 1
}

# Params:

      # Per Component log level for proxy, applies to gateways and sidecars. If a component level is
      # not set, then the global "logLevel" will be used.
      componentLogLevel: "misc:error"

      # If set, newly injected sidecars will have core dumps enabled.
      enableCoreDump: false

      # istio ingress capture allowlist
      # examples:

		{ // case 0
			args:           []string{},
			expectedString: "Describe resource and related Istio configuration",
		},
		{ // case 2 no pod
			args:           strings.Split("pod", " "),
			expectedString: "Error: expecting pod name",
			wantException:  true, // "istioctl experimental inspect pod" should fail
		},
		{ // case 3 unknown pod
			args:           strings.Split("po not-a-pod", " "),

                        at the client side.
                      properties:
                        abort:
                          description: Abort Http request attempts and return error
                            codes back to downstream service, giving the impression
                            that the upstream service is faulty.
                          oneOf:
                          - not:

func checkFields(un *unstructured.Unstructured) error {
	var errs error
	for key := range un.Object {
		if _, ok := validFields[key]; !ok {
			errs = multierror.Append(errs, fmt.Errorf("unknown field %q", key))
		}
	}
	return errs
}

func (v *validator) validateResource(istioNamespace, defaultNamespace string, un *unstructured.Unstructured, writer io.Writer) (validation.Warning, error) {
	gvk := config.GroupVersionKind{

	return nil
}

func (c *ControlzClient) PutScopes(scopes []*ScopeInfo) error {
	ch := make(chan struct {
		err       error
		scopeName string
	}, len(scopes))
	var wg sync.WaitGroup
	for _, scope := range scopes {
		wg.Add(1)
		go func(si *ScopeInfo) {
			defer wg.Done()
			err := c.PutScope(si)
			ch <- struct {
				err       error
				scopeName string
			}{err: err, scopeName: si.Name}
		}(scope)

}

func NetnsSet(n NetnsFd) error {
	if err := unix.Setns(int(n.Fd()), unix.CLONE_NEWNET); err != nil {
		return fmt.Errorf("Error switching to ns fd %v: %v", n.Fd(), err)
	}
	return nil
}

// inspired by netns.Do() but with an existing fd.
func NetnsDo(fdable NetnsFd, toRun func() error) error {
	containedCall := func() error {
		threadNS, err := netns.GetCurrentNS()
		if err != nil {

	debug, err := extractConfigDump(kubeClient, podName, podNamespace, includeEds)
	if err != nil {
		return nil, err
	}
	return setupConfigdumpEnvoyConfigWriter(debug, out)
}

func readFile(filename string) ([]byte, error) {
	file := os.Stdin
	if filename != "-" {
		var err error
		file, err = os.Open(filename)
		if err != nil {

		return nil
	}

	return err
}

func (m *realDeps) destroySet(name string) error {
	err := netlink.IpsetDestroy(name)
	return err
}

func (m *realDeps) addIP(name string, ip netip.Addr, ipProto uint8, comment string, replace bool) error {
	err := netlink.IpsetAdd(name, &netlink.IPSetEntry{
		Comment:  comment,
		IP:       net.IP(ip.AsSlice()),
		Protocol: &ipProto,

func (e ExternalInjector) Inject(pod *corev1.Pod, deploymentNS string) ([]byte, error) {
	cc := e.clientConfig
	if cc == nil {
		return nil, nil
	}
	var address string
	if cc.URL != nil {
		address = *cc.URL
	}
	var certPool *x509.CertPool
	if len(cc.CABundle) > 0 {
		certPool = x509.NewCertPool()
		certPool.AppendCertsFromPEM(cc.CABundle)
	} else {
		var err error
		certPool, err = x509.SystemCertPool()
		if err != nil {