- **Purpose**: Tests related to the Ambient mode, including components like `ztunnel`.
- **Focus**:
  1. Configuration and communication of Ambient components.
  1. Interaction between `ztunnel` and Ambient components.
  1. Validation of zero-trust security policies.
  1. Testing of ambient traffic management.
  1. Specific `istioctl ztunnel-config` commands being tested: `all`, `services`, `workloads`, `policies`, `certificates`.

  istioctl ztunnel-config workload <ztunnel-name[.namespace]> --address 0.0.0.0 -o json

  # Retrieve Ztunnel config dump separately and inspect from file.
  kubectl exec -it $ZTUNNEL -n istio-system -- curl localhost:15000/config_dump > ztunnel-config.json
  istioctl ztunnel-config workloads --file ztunnel-config.json

  # Retrieve workload summary for a specific namespace

//
// 1. Constructs a ztunnel state message to initialize ztunnel
// 2. Syncs the host ipset
func (s *NetServer) ConstructInitialSnapshot(ambientPods []*corev1.Pod) error {
	var consErr []error

	podsByUID := slices.GroupUnique(ambientPods, (*corev1.Pod).GetUID)
	if err := s.buildZtunnelSnapshot(podsByUID); err != nil {
		log.Warnf("failed to construct initial ztunnel snapshot: %v", err)
		consErr = append(consErr, err)

	isZtunnel := strings.HasPrefix(podName, "ztunnel")
	if client == nil {
		return isZtunnel
	}
	pod, err := client.Kube().CoreV1().Pods(podNamespace).Get(context.Background(), podName, metav1.GetOptions{})
	if err != nil {
		return isZtunnel
	}
	if v, ok := pod.Labels["app"]; ok {
		return v == "ztunnel"
	}
	return isZtunnel
}

extensions to the [Envoy proxy](https://github.com/envoyproxy/envoy) (in the form of
Envoy filters) that support authentication, authorization, and telemetry collection.

- [istio/ztunnel](https://github.com/istio/ztunnel). The repository contains the Rust implementation of the ztunnel
component of Ambient mesh.

- [istio/client-go](https://github.com/istio/client-go). This repository defines

  compressDashboard "istio-extension-dashboard.json"
  compressDashboard "ztunnel-dashboard.gen.json"
  echo -e "\n---\n"
  kubectl create configmap -n istio-system istio-grafana-dashboards \
    --dry-run=client -oyaml \
    --from-file=pilot-dashboard.json="${TMP}/pilot-dashboard.gen.json" \
    --from-file=ztunnel-dashboard.json="${TMP}/ztunnel-dashboard.gen.json" \

	TARGET_OUT=$(TARGET_OUT) ISTIO_BIN=$(ISTIO_BIN) GOOS_LOCAL=$(GOOS_LOCAL) bin/retry.sh SSL_ERROR_SYSCALL bin/init.sh
	touch $(TARGET_OUT)/istio_is_init

.PHONY: init-ztunnel-rs
init-ztunnel-rs:
	TARGET_OUT=$(TARGET_OUT) bin/build_ztunnel.sh

# Pull dependencies such as envoy
depend: init | $(TARGET_OUT)

DIRS_TO_CLEAN := $(TARGET_OUT)
DIRS_TO_CLEAN += $(TARGET_OUT_LINUX)

		pod.GetLabels()[label.IoIstioDataplaneMode.Name] == constants.DataplaneModeAmbient) {
		// Neither namespace nor pod has ambient mode enabled
		return false
	}
	if podHasSidecar(pod) {
		// Ztunnel and sidecar for a single pod is currently not supported; opt out.
		return false
	}
	if pod.GetLabels()[label.IoIstioDataplaneMode.Name] == constants.DataplaneModeNone {

)

var log = scopes.CNIAgent

const (
	// INPOD marks/masks
	InpodTProxyMark      = 0x111
	InpodTProxyMask      = 0xfff
	InpodMark            = 1337 // this needs to match the inpod config mark in ztunnel.
	InpodMask            = 0xfff
	InpodRestoreMask     = 0xffffffff
	ChainInpodOutput     = "ISTIO_OUTPUT"
	ChainInpodPrerouting = "ISTIO_PRERT"
	ChainHostPostrouting = "ISTIO_POSTRT"
	RouteTableInbound    = 100

    "name": "PROXY_REPO_SHA",
    "repoName": "proxy",
    "file": "",
    "lastStableSHA": "9734540ba3df743614d16377de72a6212108ec75"
  },
  {
    "_comment": "",
    "name": "ZTUNNEL_REPO_SHA",
    "repoName": "ztunnel",
    "file": "",
    "lastStableSHA": "9a192acb972e5d79301c84462be1f33db1efc794"
  }