)

// getLocalIP returns one of the local IP address and it should support IPv6 or not
func getLocalIP(dualStack bool) (netip.Addr, bool, error) {
	var isIPv6 bool
	var ipAddrs []netip.Addr
	addrs, err := LocalIPAddrs()
	if err != nil {
		return netip.Addr{}, isIPv6, err
	}

	for _, a := range addrs {
		if ipnet, ok := a.(*net.IPNet); ok {
			ip := ipnet.IP
			ipAddr, ok := netip.AddrFromSlice(ip)
			if !ok {

	}))
	if _, err := cst.c.Head(cst.ts.URL); err != nil {
		t.Fatal(err)
	}

	host := cst.ts.Listener.Addr().String()
	got := <-ch
	if addr, ok := got.(net.Addr); !ok {
		t.Errorf("local addr value = %T; want net.Addr", got)
	} else if fmt.Sprint(addr) != host {
		t.Errorf("local addr = %v; want %v", addr, host)
	}
}

// https://golang.org/issue/15960

	// Find IP addr of excluded interfaces and add to a map for instant lookup
	for _, ifaceName := range exclusions {
		iface, err := net.InterfaceByName(ifaceName)
		if err != nil {
			log.Warnf("Unable to get interface %s: %v", ifaceName, err)
			continue
		}
		addrs, err := iface.Addrs()
		if err != nil {
			log.Warnf("Unable to get IP addr(s) of interface %s: %v", ifaceName, err)
			continue

	}
	releaseSudog(s)
}

func semrelease(addr *uint32) {
	semrelease1(addr, false, 0)
}

func semrelease1(addr *uint32, handoff bool, skipframes int) {
	root := semtable.rootFor(addr)
	atomic.Xadd(addr, 1)

	// Easy case: no waiters?
	// This check must happen after the xadd, to avoid a missed wakeup
	// (see loop in semacquire).
	if root.nwait.Load() == 0 {
		return
	}

		haddrs, err := globalDNSCache.LookupHost(ctx, host)
		if err == nil {
			for _, addr := range haddrs {
				addrs.Add(net.JoinHostPort(addr, globalMinioPort))
			}
		} else {
			// Unable to lookup host in 2-secs, let it fail later anyways.
			addrs.Add(globalMinioAddr)
		}
	} else {
		addrs.Add(globalMinioAddr)
	}
	return addrs.ToSlice()
}

var globalLoggerOutput io.WriteCloser

			if nodeIPSpecified {
				ipAddr = nodeIP
			} else if addr := netutils.ParseIPSloppy(hostname); addr != nil {
				ipAddr = addr
			} else {
				var addrs []net.IP
				addrs, _ = net.LookupIP(node.Name)
				for _, addr := range addrs {
					if err = validateNodeIPFunc(addr); err == nil {
						if isPreferredIPFamily(addr) {
							ipAddr = addr
							break
						} else if ipAddr == nil {
							ipAddr = addr

		}
		if !tt.a && !tt.aaaa && len(addrs) > 0 {
			t.Errorf("unexpected %v for %s", addrs, tt.name)
		}
		for _, addr := range addrs {
			if !tt.a && addr.IP.To4() != nil {
				t.Errorf("got %v; must not be IPv4 address", addr)
			}
			if !tt.aaaa && addr.IP.To16() != nil && addr.IP.To4() == nil {
				t.Errorf("got %v; must not be IPv6 address", addr)
			}
		}
	}
}

			if net.ParseIP(endpoint) == nil {
				// Checking if the IP is a DNS entry.
				addrs, err := globalDNSCache.LookupHost(GlobalContext, endpoint)
				if err != nil {
					logger.FatalIf(err, "Unable to initialize MinIO server with [%s] invalid entry found in MINIO_PUBLIC_IPS", endpoint)
				}
				for _, addr := range addrs {
					domainIPs.Add(addr)
				}
			}
			domainIPs.Add(endpoint)
		}
		updateDomainIPs(domainIPs)

func IPv4Unspecified() Addr { return AddrFrom4([4]byte{}) }

// AddrFrom4 returns the address of the IPv4 address given by the bytes in addr.
func AddrFrom4(addr [4]byte) Addr {
	return Addr{
		addr: uint128{0, 0xffff00000000 | uint64(addr[0])<<24 | uint64(addr[1])<<16 | uint64(addr[2])<<8 | uint64(addr[3])},
		z:    z4,
	}
}

// AddrFrom16 returns the IPv6 address given by the bytes in addr.

	}
	_ = *addr // if nil, fault before taking the lock
	var r uint64
	addrLock(addr).lock()
	r = *addr
	addrLock(addr).unlock()
	return r
}

//go:nosplit
func goStore64(addr *uint64, v uint64) {
	if uintptr(unsafe.Pointer(addr))&7 != 0 {
		*(*int)(nil) = 0 // crash on unaligned uint64
	}
	_ = *addr // if nil, fault before taking the lock
	addrLock(addr).lock()
	*addr = v
	addrLock(addr).unlock()
}