}

// IsIPv6Address returns if ip is IPv6.
func IsIPv6Address(ip string) bool {
	ipa, err := netip.ParseAddr(ip)
	if err != nil {
		return false
	}
	return ipa.Is6()
}

// IsIPv4Address returns if ip is IPv4.
func IsIPv4Address(ip string) bool {
	ipa, err := netip.ParseAddr(ip)
	if err != nil {
		return false
	}
	return ipa.Is4()
}

// IPsSplitV4V6 returns two slice of ipv4 and ipv6 string slice.

			args: args{
				ip: "188.188.188.1888",
			},
			want: false,
		},
	}
	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			if got := IsIPv4Address(tt.args.ip); got != tt.want {
				t.Errorf("IsIPv4Address() = %v, want %v", got, tt.want)
			}
		})
	}
}

func TestIPsSplitV4V61(t *testing.T) {
	type args struct {
		ips []string
	}
	tests := []struct {

			}
			var err error
			if port, err = strconv.Atoi(hostPort); err != nil {
				continue
			}
			if hostIP == model.PodIPAddressPrefix {
				for _, proxyIPAddr := range cb.proxyIPAddresses {
					if netutil.IsIPv4Address(proxyIPAddr) {
						endpointAddress = proxyIPAddr
						break
					}
				}
				// if there is no any IPv4 address in proxyIPAddresses
				if endpointAddress == "" {