{"udp4", "localhost:2", &UDPAddr{IP: IPv4(127, 0, 0, 1), Port: 2}, nil},
		}...)
		resolveIPAddrTests = append(resolveIPAddrTests, []resolveIPAddrTest{
			{"ip", "localhost", &IPAddr{IP: IPv4(127, 0, 0, 1)}, nil},
			{"ip4", "localhost", &IPAddr{IP: IPv4(127, 0, 0, 1)}, nil},
		}...)
	}

	if supportsIPv6() {

				break
			}
		}
		if nodePort == 0 {
			return nil, false, fmt.Errorf("no port %d found in service: %s/%s", port, ns, svcName)
		}

		ipAddr, err := netip.ParseAddr(ip)
		if err != nil {
			return nil, false, err
		}
		return []any{netip.AddrPortFrom(ipAddr, uint16(nodePort))}, true, nil
	}

	// Otherwise, get the load balancer IP.

	if ifi == nil {
		return IPv4zero, nil
	}
	ifat, err := ifi.Addrs()
	if err != nil {
		return nil, err
	}
	for _, ifa := range ifat {
		switch v := ifa.(type) {
		case *IPAddr:
			if v.IP.To4() != nil {
				return v.IP, nil
			}
		case *IPNet:
			if v.IP.To4() != nil {
				return v.IP, nil
			}
		}
	}
	return nil, errNoSuchInterface
}

// specify an alternate resolver func.
// It is not exposed to outsider users. (But see issue 12503)
// The value should be the same type as lookupIP:
//
//	func lookupIP(ctx context.Context, host string) ([]IPAddr, error)
type LookupIPAltResolverKey struct{}

// Trace contains a set of hooks for tracing events within
// the net package. Any specific hook may be nil.
type Trace struct {

		}
		switch *_C_ai_family(r) {
		case _C_AF_INET:
			sa := (*syscall.RawSockaddrInet4)(unsafe.Pointer(*_C_ai_addr(r)))
			addr := IPAddr{IP: copyIP(sa.Addr[:])}
			addrs = append(addrs, addr)
		case _C_AF_INET6:
			sa := (*syscall.RawSockaddrInet6)(unsafe.Pointer(*_C_ai_addr(r)))
			addr := IPAddr{IP: copyIP(sa.Addr[:]), Zone: zoneCache.name(int(sa.Scope_id))}
			addrs = append(addrs, addr)
		}
	}
	return addrs, nil
}

	addresses := make(map[string]net.IP)
	for _, cidr := range npa.cidrs {
		for _, addr := range addrs {
			var ip net.IP
			// nw.InterfaceAddrs may return net.IPAddr or net.IPNet on windows, and it will return net.IPNet on linux.
			switch v := addr.(type) {
			case *net.IPAddr:
				ip = v.IP
			case *net.IPNet:
				ip = v.IP
			default:
				continue
			}

			if cidr.Contains(ip) {
				addresses[ip.String()] = ip

	if shared {
		clone := make([]IPAddr, len(addrs))
		copy(clone, addrs)
		addrs = clone
	}
	return addrs, nil
}

// ipAddrsEface returns an empty interface slice of addrs.
func ipAddrsEface(addrs []IPAddr) []any {
	s := make([]any, len(addrs))
	for i, v := range addrs {
		s[i] = v
	}
	return s
}

// LookupPort looks up the port for the given network and service.
//

// Minimal RFC 6724 address selection.

package net

import (
	"net/netip"
	"sort"
)

func sortByRFC6724(addrs []IPAddr) {
	if len(addrs) < 2 {
		return
	}
	sortByRFC6724withSrcs(addrs, srcAddrs(addrs))
}

func sortByRFC6724withSrcs(addrs []IPAddr, srcs []netip.Addr) {
	if len(addrs) != len(srcs) {
		panic("internal error")
	}
	addrAttr := make([]ipAttr, len(addrs))

	}
	switch fd.laddr.(type) {
	case *TCPAddr:
		return newTCPConn(fd, defaultTCPKeepAliveIdle, KeepAliveConfig{}, testPreHookSetKeepAlive, testHookSetKeepAlive), nil
	case *UDPAddr:
		return newUDPConn(fd), nil
	case *IPAddr:
		return newIPConn(fd), nil
	case *UnixAddr:
		return newUnixConn(fd), nil
	}
	fd.Close()
	return nil, syscall.EINVAL
}

func fileListener(f *os.File) (Listener, error) {
	fd, err := newFileFD(f)

		}
		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