}

func BenchmarkTCP6OneShot(b *testing.B) {
	if !supportsIPv6() {
		b.Skip("ipv6 is not supported")
	}
	benchmarkTCP(b, false, false, "[::1]:0")
}

func BenchmarkTCP6OneShotTimeout(b *testing.B) {
	if !supportsIPv6() {
		b.Skip("ipv6 is not supported")
	}
	benchmarkTCP(b, false, true, "[::1]:0")
}

func BenchmarkTCP6Persistent(b *testing.B) {
	if !supportsIPv6() {
		b.Skip("ipv6 is not supported")
	}

		return ln
	}

	switch network {
	case "tcp":
		if supportsIPv4() {
			return listen("tcp4", "127.0.0.1:0")
		}
		if supportsIPv6() {
			return listen("tcp6", "[::1]:0")
		}
	case "tcp4":
		if supportsIPv4() {
			return listen("tcp4", "127.0.0.1:0")
		}
	case "tcp6":
		if supportsIPv6() {
			return listen("tcp6", "[::1]:0")
		}
	case "unix", "unixpacket":
		return listen(network, testUnixAddr(t))
	}

	case "windows":
		t.Skipf("not implemented a way to cancel dial racers in TCP SYN-SENT state on %s", runtime.GOOS)
	case "openbsd":
		testenv.SkipFlaky(t, 15157)
	}
	if !supportsIPv4() || !supportsIPv6() {
		t.Skip("both IPv4 and IPv6 are required")
	}

	before := sw.Sockets()
	origTestHookLookupIP := testHookLookupIP
	defer func() { testHookLookupIP = origTestHookLookupIP }()
	testHookLookupIP = lookupLocalhost

		proxyVersion:       proxy.Metadata.IstioVersion,
		sidecarScope:       proxy.SidecarScope,
		passThroughBindIPs: getPassthroughBindIPs(proxy.GetIPMode()),
		supportsIPv4:       proxy.SupportsIPv4(),
		supportsIPv6:       proxy.SupportsIPv6(),
		sendHbone:          features.EnableHBONESend || proxy.IsWaypointProxy(),
		locality:           proxy.Locality,
		proxyLabels:        proxy.Labels,
		proxyView:          proxy.GetView(),

// to be greater than or equal to 4.4.
func TestDualStackTCPListener(t *testing.T) {
	switch runtime.GOOS {
	case "plan9":
		t.Skipf("not supported on %s", runtime.GOOS)
	}
	if !supportsIPv4() || !supportsIPv6() {
		t.Skip("both IPv4 and IPv6 are required")
	}

	for _, tt := range dualStackTCPListenerTests {
		if !testableListenArgs(tt.network1, JoinHostPort(tt.address1, "0"), "") {

	"fmt"
	"internal/testenv"
	"net/netip"
	"os"
	"reflect"
	"runtime"
	"testing"
	"time"
)

func BenchmarkUDP6LinkLocalUnicast(b *testing.B) {
	testHookUninstaller.Do(uninstallTestHooks)

	if !supportsIPv6() {
		b.Skip("IPv6 is not supported")
	}
	ifi := loopbackInterface()
	if ifi == nil {
		b.Skip("loopback interface not found")
	}
	lla := ipv6LinkLocalUnicastAddr(ifi)
	if lla == "" {

	"8.8.8.8",
	"8.8.4.4",
	"2001:4860:4860::8888",
	"2001:4860:4860::8844",
}

func TestLookupGooglePublicDNSAddr(t *testing.T) {
	mustHaveExternalNetwork(t)

	if !supportsIPv4() || !supportsIPv6() || !*testIPv4 || !*testIPv6 {
		t.Skip("both IPv4 and IPv6 are required")
	}

	defer dnsWaitGroup.Wait()

	for _, ip := range lookupGooglePublicDNSAddrTests {
		names, err := LookupAddr(ip)

}

// SupportsIPv4 returns true if proxy supports IPv4 addresses.
func (node *Proxy) SupportsIPv4() bool {
	return node.ipMode == IPv4 || node.ipMode == Dual
}

// SupportsIPv6 returns true if proxy supports IPv6 addresses.
func (node *Proxy) SupportsIPv6() bool {
	return node.ipMode == IPv6 || node.ipMode == Dual
}

// IsIPv6 returns true if proxy only supports IPv6 addresses.
func (node *Proxy) IsIPv6() bool {

	}
}

func TestDialAddrError(t *testing.T) {
	switch runtime.GOOS {
	case "plan9":
		t.Skipf("not supported on %s", runtime.GOOS)
	}

	if !supportsIPv4() || !supportsIPv6() {
		t.Skip("both IPv4 and IPv6 are required")
	}

	for _, tt := range []struct {
		network string
		lit     string
		addr    *TCPAddr
	}{
		{"tcp4", "::1", nil},

}

// IsIPv6 returns true if proxy only supports IPv6 addresses.
func (node *Proxy) IsIPv6() bool {
	return node.ipMode == model.IPv6
}

func (node *Proxy) SupportsIPv6() bool {
	return node.ipMode == model.IPv6 || node.ipMode == model.Dual
}

const (
	serviceNodeSeparator = "~"
)

func (node *Proxy) ServiceNode() string {
	ip := ""