}

func forEachLoopbackRoute(cfg *Config, f func(*netlink.Route) error) error {
	loopbackLink, err := netlink.LinkByName("lo")
	if err != nil {
		return fmt.Errorf("failed to find 'lo' link: %v", err)
	}

	// Set up netlink routes for localhost
	cidrs := []string{"0.0.0.0/0"}
	if cfg.EnableIPv6 {
		cidrs = append(cidrs, "0::0/0")
	}
	for _, fullCIDR := range cidrs {

- In ambient mode, the CNI plugin does not configure any networking, but is only responsible for synchronously pushing new pod events back up to an ambient watch server which runs as part of the Istio CNI node agent. The ambient server will find the pod netns and configure networking inside that pod via iptables. The ambient server will additionally watch enabled namespaces, and enroll already-started-but-newly-enrolled pods in a similar fashion.

## Privileges required

	if err != nil {
		return fmt.Errorf("failed to retrieve tag with name %s: %v", tagName, err)
	}
	if len(webhooks) == 0 {
		return fmt.Errorf("cannot remove tag %q: cannot find MutatingWebhookConfiguration for tag", tagName)
	}

	taggedNamespaces, err := GetNamespacesWithTag(ctx, kubeClient, tagName)
	if err != nil {

	}))

	return s
}

func (s *InformerHandlers) GetPodIfAmbient(podName, podNamespace string) (*corev1.Pod, error) {
	ns := s.namespaces.Get(podNamespace, "")
	if ns == nil {
		return nil, fmt.Errorf("failed to find namespace %v", ns)
	}
	pod := s.pods.Get(podName, podNamespace)
	if util.PodRedirectionEnabled(ns, pod) {
		return pod, nil
	}
	return nil, nil
}

func (s *InformerHandlers) Start() {

		if !strings.EqualFold(workload.Namespace, wf.Namespace) {
			return false
		}
	}

	if wf.Address != "" {
		var find bool
		for _, ip := range workload.WorkloadIPs {
			if strings.EqualFold(ip, wf.Address) {
				find = true
				break
			}
		}
		if !find {
			return false
		}
	}
	if wf.Node != "" && !strings.EqualFold(workload.Node, wf.Node) {
		return false
	}
	return true
}

	log.Debugf("Pod is now opt out... cleaning up.")

	openNetns := s.currentPodSnapshot.Take(string(pod.UID))
	if openNetns == nil {
		log.Warn("failed to find pod netns")
		return fmt.Errorf("failed to find pod netns")
	}
	// pod is removed from the mesh, but is still running. remove iptables rules
	log.Debugf("calling DeleteInpodRules.")

	}
	meshConfigMap, err := client.Kube().CoreV1().ConfigMaps(ctx.IstioNamespace()).Get(context.TODO(), injectConfigMapName, metav1.GetOptions{})
	if err != nil {
		return "", fmt.Errorf("could not find valid configmap %q from namespace  %q: %v - "+
			"Use --valuesFile or re-run kube-inject with `-i <istioSystemNamespace> and ensure istio-sidecar-injector configmap exists",
			injectConfigMapName, ctx.IstioNamespace(), err)
	}

	})
	if err != nil {
		panic(err)
	}
	defer podUIDNetns.Close()

	if len(podUIDNetns) == 0 {
		t.Fatal("expected to find pod netns")
	}

	expectedUID := "863b91d4-4b68-4efa-917f-4b560e3e86aa"
	if podUIDNetns[expectedUID] == (WorkloadInfo{}) {
		t.Fatal("expected to find pod netns under pod uid")
	}
}

// copied and modified from spire

func TestGetContainerIDFromCGroups(t *testing.T) {

		istiodDump := &configdump.Wrapper{}
		err := json.Unmarshal(resp, istiodDump)
		if err != nil {
			continue
		}
		c.istiod = istiodDump
		break
	}
	if c.istiod == nil {
		return nil, fmt.Errorf("unable to find config dump in Istiod responses")
	}
	envoyDump := &configdump.Wrapper{}
	err := json.Unmarshal(envoyResponse, envoyDump)
	if err != nil {
		return nil, err
	}
	c.envoy = envoyDump
	c.w = w
	c.context = 7

  // PotentialNodes lists nodes where the Pod might be able to run.
  //
  // The size of this field is limited to 128. This is large enough for
  // many clusters. Larger clusters may need more attempts to find a node
  // that suits all pending resources. This may get increased in the
  // future, but not reduced.
  //
  // +listType=set
  // +optional
  repeated string potentialNodes = 2;
}