expectedURL      string
	}{
		{
			name:             "IPv4",
			advertiseAddress: "10.10.10.10",
			expectedURL:      fmt.Sprintf("https://10.10.10.10:%s", portStr),
		},
		{
			name:             "IPv6",
			advertiseAddress: "2001:db8::2",
			expectedURL:      fmt.Sprintf("https://[2001:db8::2]:%s", portStr),
		},
		{
			name:             "IPv4 localhost",
			advertiseAddress: "127.0.0.1",

		name   string
		in     []string
		expect string
	}{
		{
			name:   "single IPv4 (k8s)",
			in:     []string{"10.0.4.16"},
			expect: "10.0.4.16",
		},
		{
			name:   "single IPv6 (k8s)",
			in:     []string{"fc00:f853:ccd:e793::1"},
			expect: "fc00:f853:ccd:e793::1",
		},
		{
			name:   "multi IPv4 [1st] (VM)",

	}
	return n, addr, err
}

// ReadFromUDPAddrPort acts like ReadFrom but returns a netip.AddrPort.
//
// If c is bound to an unspecified address, the returned
// netip.AddrPort's address might be an IPv4-mapped IPv6 address.
// Use netip.Addr.Unmap to get the address without the IPv6 prefix.
func (c *UDPConn) ReadFromUDPAddrPort(b []byte) (n int, addr netip.AddrPort, err error) {
	if !c.ok() {

		if p == "*" {
			c.ipMatchers = []matcher{allMatch{}}
			c.domainMatchers = []matcher{allMatch{}}
			return
		}

		// IPv4/CIDR, IPv6/CIDR
		if _, pnet, err := net.ParseCIDR(p); err == nil {
			c.ipMatchers = append(c.ipMatchers, cidrMatch{cidr: pnet})
			continue
		}

		// IPv4:port, [IPv6]:port
		phost, pport, err := net.SplitHostPort(p)
		if err == nil {
			if len(phost) == 0 {

func (d *Dialer) SetMultipathTCP(use bool) {
	d.mptcpStatus.set(use)
}

// Dial connects to the address on the named network.
//
// Known networks are "tcp", "tcp4" (IPv4-only), "tcp6" (IPv6-only),
// "udp", "udp4" (IPv4-only), "udp6" (IPv6-only), "ip", "ip4"
// (IPv4-only), "ip6" (IPv6-only), "unix", "unixgram" and
// "unixpacket".
//
// For TCP and UDP networks, the address has the form "host:port".

		case "State                              : disconnected":
			isup = false
		default:
			continue
		}
		if name != "" {
			if v, ok := ifaces[name]; ok && v != isup {
				return fmt.Errorf("%s:%s isup=%v: ipv4 and ipv6 report different interface state", ipver, name, isup)
			}
			ifaces[name] = isup
			name = ""
		}
	}
	return nil
}

func TestInterfacesWithNetsh(t *testing.T) {
	checkNetsh(t)

		} else {
			if !strings.HasSuffix(hostname, ".") {
				hostname += "."
			}
			altHosts = sets.New(hostname)
		}
		ipv4, ipv6 := netutil.ParseIPsSplitToV4V6(ni.Ips)
		if len(ipv6) == 0 && len(ipv4) == 0 {
			// malformed ips
			continue
		}
		apply(altHosts, ipv4, ipv6, h.searchNamespaces)
	}
}

// upstream sends the request to the upstream server, with associated logs and metrics

	} else if features.EnableAdditionalIpv4OutboundListenerForIpv6Only && (lb.node.GetIPMode() == model.IPv6) {
		// add an additional IPv4 outbound listener for IPv6 only clusters
		ipv4Wildcards, _ := getWildcardsAndLocalHost(model.IPv4) // get the IPv4 based wildcards
		ipTablesListener.AdditionalAddresses = util.BuildAdditionalAddresses(ipv4Wildcards[0:], uint32(lb.push.Mesh.ProxyListenPort))
	}

		},
		Authenticators: []security.Authenticator{auth},
		monitoring:     newMonitoringMetrics(),
	}
	mockCertChain := []string{"cert", "cert_chain", "root_cert"}
	mockIPAddr := &net.IPAddr{IP: net.IPv4(192, 168, 1, 1)}
	testCerts := map[string]struct {
		certChain    [][]*x509.Certificate
		caller       *security.Caller
		fakeAuthInfo *mockAuthInfo
		code         codes.Code
		ipAddr       *net.IPAddr
	}{

		expectedEndpoint *kubeadmapi.APIEndpoint
		expectedErr      bool
	}{
		{
			name:        "no pod annotations",
			nodeName:    nodeName,
			expectedErr: true,
		},
		{
			name:     "valid ipv4 endpoint in pod annotation",
			nodeName: nodeName,
			staticPod: &testresources.FakeStaticPod{
				Component: kubeadmconstants.KubeAPIServer,
				Annotations: map[string]string{