// the IPv4 or IPv6 zero CIDR
func IsZeroCIDR(cidr string) bool {
	if cidr == IPv4ZeroCIDR || cidr == IPv6ZeroCIDR {
		return true
	}
	return false
}

// ShouldSkipService checks if a given service should skip proxying
func ShouldSkipService(service *v1.Service) bool {
	// if ClusterIP is "None" or empty, skip proxying
	if !helper.IsServiceIPSet(service) {

//
// NOTE: service object should NOT be modified.
func (sct *ServiceChangeTracker) serviceToServiceMap(service *v1.Service) ServicePortMap {
	if service == nil {
		return nil
	}

	if proxyutil.ShouldSkipService(service) {
		return nil
	}

	clusterIP := proxyutil.GetClusterIPByFamily(sct.ipFamily, service)
	if clusterIP == "" {
		return nil
	}

	svcPortMap := make(ServicePortMap)