pconstants "istio.io/istio/cni/pkg/constants"
	"istio.io/istio/cni/pkg/ipset"
	"istio.io/istio/cni/pkg/iptables"
	"istio.io/istio/cni/pkg/util"
	"istio.io/istio/pkg/kube"
)

type MeshDataplane interface {
	// called first, (even before Start()).
	ConstructInitialSnapshot(ambientPods []*corev1.Pod) error
	Start(ctx context.Context)

	//	IsPodInMesh(ctx context.Context, pod *metav1.ObjectMeta, netNs string) (bool, error)

  // are specific to the node & CRI configuration.  It is assumed that all
  // handlers are available on every node, and handlers of the same name are
  // equivalent on every node.
  // For example, a handler called "runc" might specify that the runc OCI
  // runtime (using native Linux containers) will be used to run the containers
  // in a pod.
  // The Handler must be lowercase, conform to the DNS Label (RFC 1123) requirements,

  // values are specific to the node & CRI configuration.  It is assumed that
  // all handlers are available on every node, and handlers of the same name are
  // equivalent on every node.
  // For example, a handler called "runc" might specify that the runc OCI
  // runtime (using native Linux containers) will be used to run the containers
  // in a pod.
  // The runtimeHandler must be lowercase, conform to the DNS Label (RFC 1123)

  // If the CSIDriverRegistry feature gate is enabled and the value is
  // specified to false, the attach operation will be skipped.
  // Otherwise the attach operation will be called.
  //
  // This field is immutable.
  //
  // +optional
  optional bool attachRequired = 1;

  // podInfoOnMount indicates this CSI volume driver requires additional pod information (like podName, podUID, etc.)

      return 2
    fi
  done
}

# load_cluster_topology function reads cluster configuration topology file and
# sets up environment variables used by other functions. So this should be called
# before anything else.
#
# Note: Cluster configuration topology file specifies basic configuration of each
# KinD cluster like its name, pod and service subnets and network_id. If two cluster

	Description     string `json:"description,omitempty"`
	OutputLevel     string `json:"output_level,omitempty"`
	StackTraceLevel string `json:"stack_trace_level,omitempty"`
	LogCallers      bool   `json:"log_callers,omitempty"`
}

type ScopeLevelPair struct {
	scope    string
	logLevel string
}

type scopeStackTraceLevelPair ScopeLevelPair

// K8S may get a pod Add event without any IPs in the object, and the pod will later be updated with IPs.
//
// We always need the IPs, but this is fine because this AddPodToMesh can be called from the CNI plugin as well,
// which always has the firsthand info of the IPs, even before K8S does - so we pass them separately here because
// we actually may have them before K8S in the Pod object.

  // of queues and deal a hand of the size specified here.  The
  // request is put into one of the shortest queues in that hand.
  // `handSize` must be no larger than `queues`, and should be
  // significantly smaller (so that a few heavy flows do not
  // saturate most of the queues).  See the user-facing
  // documentation for more extensive guidance on setting this
  // field.  This field has a default value of 8.
  // +optional

  // of queues and deal a hand of the size specified here.  The
  // request is put into one of the shortest queues in that hand.
  // `handSize` must be no larger than `queues`, and should be
  // significantly smaller (so that a few heavy flows do not
  // saturate most of the queues).  See the user-facing
  // documentation for more extensive guidance on setting this
  // field.  This field has a default value of 8.
  // +optional

  // +optional
  optional LifecycleHandler postStart = 1;

  // PreStop is called immediately before a container is terminated due to an
  // API request or management event such as liveness/startup probe failure,
  // preemption, resource contention, etc. The handler is not called if the
  // container crashes or exits. The Pod's termination grace period countdown begins before the