serviceCIDRs.Insert(v.UnsortedList()...)
				return false
			})
			if serviceCIDRs.Len() == 1 && serviceCIDRs.Has(serviceCIDR.Name) {
				hasParent = false
			}
		}
	}

	// All the existing IP addresses will be contained on the parent ServiceCIDRs,
	// it is safe to delete, remove the finalizer.
	if hasParent {
		logger.V(2).Info("Removing finalizer for ServiceCIDR", "ServiceCIDR", serviceCIDR.String())

		klog.V(2).Infof("Finished sync for CIDRs took %v", time.Since(now))
	}()

	serviceCIDRs, err := c.serviceCIDRLister.List(labels.Everything())
	if err != nil {
		return err
	}

	cidrsSet := sets.New[string]()
	cidrReady := map[string]bool{}
	for _, serviceCIDR := range serviceCIDRs {
		ready := true
		if !isReady(serviceCIDR) || !serviceCIDR.DeletionTimestamp.IsZero() {
			ready = false
		}

	if err == nil {
		r.cidrQueue.Forget(key)
		return
	}

	if r.cidrQueue.NumRequeues(key) < maxRetries {
		klog.V(2).InfoS("Error syncing ServiceCIDR, retrying", "serviceCIDR", key, "err", err)
		r.cidrQueue.AddRateLimited(key)
		return
	}

	klog.Warningf("Dropping ServiceCIDR %q out of the queue: %v", key, err)
	r.cidrQueue.Forget(key)
	runtime.HandleError(err)
}

// events on ServiceCIDR objects and call downstream event handlers.
func (c *ServiceCIDRConfig) handleServiceCIDREvent(oldObj, newObj interface{}) {
	var oldServiceCIDR, newServiceCIDR *networkingv1alpha1.ServiceCIDR
	var ok bool

	if oldObj != nil {
		oldServiceCIDR, ok = oldObj.(*networkingv1alpha1.ServiceCIDR)
		if !ok {

		informers.WithTweakListOptions(func(options *metav1.ListOptions) {
			options.LabelSelector = labelSelector.String()
		}))

	// Create configs (i.e. Watches for Services, EndpointSlices and ServiceCIDRs)
	// Note: RegisterHandler() calls need to happen before creation of Sources because sources
	// only notify on changes, and the initial update (on process start) may be lost if no handlers
	// are registered yet.

					_, clusterCIDR, _ := netutils.ParseCIDRSloppy("127.123.234.0/24")
					return []*net.IPNet{clusterCIDR}
				}(),
				ServiceCIDR: func() *net.IPNet {
					_, serviceCIDR, _ := netutils.ParseCIDRSloppy("127.123.234.0/26")
					return serviceCIDR
				}(),
				SecondaryServiceCIDR: nil,
				NodeCIDRMaskSizes:    []int{30},
			},
			// it should return first /30 CIDR after service range

	// clusterCIDR).
	for idx, cidr := range r.clusterCIDRs {
		// if they don't overlap then ignore the filtering
		if !cidr.Contains(serviceCIDR.IP.Mask(cidr.Mask)) && !serviceCIDR.Contains(cidr.IP.Mask(serviceCIDR.Mask)) {
			continue
		}

		// at this point, len(cidrSet) == len(clusterCidr)
		if err := r.cidrSets[idx].Occupy(serviceCIDR); err != nil {

	"k8s.io/kubernetes/pkg/features"
)

func makeOptionsWithCIDRs(serviceCIDR string, secondaryServiceCIDR string) *ServerRunOptions {
	value := serviceCIDR
	if len(secondaryServiceCIDR) > 0 {
		value = value + "," + secondaryServiceCIDR
	}

	var primaryCIDR, secondaryCIDR net.IPNet
	if len(serviceCIDR) > 0 {
		_, cidr, _ := netutils.ParseCIDRSloppy(serviceCIDR)
		if cidr != nil {
			primaryCIDR = *(cidr)
		}
	}

	if len(strings.TrimSpace(controllerContext.ComponentConfig.NodeIPAMController.ServiceCIDR)) != 0 {
		_, serviceCIDR, err = netutils.ParseCIDRSloppy(controllerContext.ComponentConfig.NodeIPAMController.ServiceCIDR)
		if err != nil {
			logger.Info("Warning: unsuccessful parsing of service CIDR", "CIDR", controllerContext.ComponentConfig.NodeIPAMController.ServiceCIDR, "err", err)
		}
	}

	ipv6File := "FileContent--proc-sys-net-ipv6-conf-default-forwarding"
	var tests = []struct {
		testName    string
		PodSubnet   string
		serviceCidr string
		expStr      []string
	}{
		{
			testName:    "dual stack",
			PodSubnet:   "fda9:d324:354d:0::/56",
			serviceCidr: "10.96.0.0/16,fda9:d324:354d:1::/112",