}
		defer syscall.FreeAddrInfoW(result)
		addrs := make([]IPAddr, 0, 5)
		for ; result != nil; result = result.Next {
			addr := unsafe.Pointer(result.Addr)
			switch result.Family {
			case syscall.AF_INET:
				a := (*syscall.RawSockaddrInet4)(addr).Addr
				addrs = append(addrs, IPAddr{IP: copyIP(a[:])})
			case syscall.AF_INET6:
				a := (*syscall.RawSockaddrInet6)(addr).Addr

	// associative entity.
	type keyString string
	keyToAddrReadyMap := map[keyString]addressSet{}
	addrReadyMapKeyToPorts := map[keyString][]v1.EndpointPort{}
	for port, addrs := range portToAddrReadyMap {
		key := keyString(hashAddresses(addrs))
		keyToAddrReadyMap[key] = addrs
		if port.Port > 0 { // avoid sentinels
			addrReadyMapKeyToPorts[key] = append(addrReadyMapKeyToPorts[key], port)
		} else {

				continue
			}
			ift[n].Index = m.Index
			ift[n].Name = m.Name
			ift[n].Flags = linkFlags(m.Flags)
			if sa, ok := m.Addrs[syscall.RTAX_IFP].(*route.LinkAddr); ok && len(sa.Addr) > 0 {
				ift[n].HardwareAddr = make([]byte, len(sa.Addr))
				copy(ift[n].HardwareAddr, sa.Addr)
			}
			for _, sys := range m.Sys() {
				if imx, ok := sys.(*route.InterfaceMetrics); ok {
					ift[n].MTU = imx.MTU
					break
				}

		addr1 := v1.UnsafeAddr()
		addr2 := v2.UnsafeAddr()
		if addr1 > addr2 {
			// Canonicalize order to reduce number of entries in visited.
			addr1, addr2 = addr2, addr1
		}

		// Short circuit if references are identical ...
		if addr1 == addr2 {
			return true
		}

		// ... or already seen
		typ := v1.Type()
		v := visit{addr1, addr2, typ}
		if visited[v] {

	if err != nil {
		return nil, err
	}
	var addrs []Addr
	if ifi != nil {
		addrs, err = ifi.Addrs()
		if err != nil {
			return nil, err
		}
	} else {
		addrs, err = InterfaceAddrs()
		if err != nil {
			return nil, err
		}
	}

	have4 := gaddr.IP.To4() != nil
	for _, addr := range addrs {
		if ipnet, ok := addr.(*IPNet); ok && (ipnet.IP.To4() != nil) == have4 {

		addr, err := ResolveTCPAddr(network, "www.google.com:http")
		if err != nil {
			t.Error(err)
			continue
		}
		switch {
		case network == "tcp" && addr.IP.To4() == nil:
			fallthrough
		case network == "tcp4" && addr.IP.To4() == nil:
			t.Errorf("got %v; want an IPv4 address on %s", addr, network)
		case network == "tcp6" && (addr.IP.To16() == nil || addr.IP.To4() != nil):

			continue
		}
		have := make([]string, 0)
		addrs, err := ifi.Addrs()
		if err != nil {
			t.Fatal(err)
		}
		for _, addr := range addrs {
			switch addr := addr.(type) {
			case *IPNet:
				if addr.IP.To4() != nil {
					have = append(have, addr.String())
				}
				if addr.IP.To16() != nil && addr.IP.To4() == nil {
					// netsh does not output netmask for ipv6, so ignore ipv6 mask

		// become eventually correct.
		if addrs := &e.Subsets[0].Addresses; len(*addrs) > r.masterCount {
			// addrs is a pointer because we're going to mutate it.
			for i, addr := range *addrs {
				if addr.IP == ip.String() {
					for len(*addrs) > r.masterCount {
						// wrap around if necessary.
						remove := (i + 1) % len(*addrs)
						*addrs = append((*addrs)[:remove], (*addrs)[remove+1:]...)
					}
					break
				}

type InterfaceMessage struct {
	Version int    // message version
	Type    int    // message type
	Flags   int    // interface flags
	Index   int    // interface index
	Name    string // interface name
	Addrs   []Addr // addresses

	extOff int    // offset of header extension
	raw    []byte // raw message
}

// An InterfaceAddrMessage represents an interface address message.
type InterfaceAddrMessage struct {

	// Partition addresses into two sets: ones with a known object file, and ones without.
	var addrs, unprocessed []uint64
	for addr, info := range addrMap {
		if info.obj != nil {
			addrs = append(addrs, addr)
		} else {
			unprocessed = append(unprocessed, addr)
		}
	}
	sort.Slice(addrs, func(i, j int) bool { return addrs[i] < addrs[j] })

	const expand = 500 // How much to expand range to pick up nearby addresses.