ch <- dnsNameTest{longDomain[len(longDomain)-254:], false}
}

func TestDNSName(t *testing.T) {
	ch := make(chan dnsNameTest)
	go emitDNSNameTest(ch)
	for tc := range ch {
		if isDomainName(tc.name) != tc.result {
			t.Errorf("isDomainName(%q) = %v; want %v", tc.name, !tc.result, tc.result)
		}
	}
}

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

			b += 0x20
		}
		if a != b {
			return false
		}
	}
	return true
}

// isDomainName checks if a string is a presentation-format domain name
// (currently restricted to hostname-compatible "preferred name" LDH labels and
// SRV-like "underscore labels"; see golang.org/issue/12421).
//
// isDomainName should be an internal detail,
// but widely used packages access it using linkname.

}

func (conf *resolverConfig) releaseSema() {
	<-conf.ch
}

func (r *Resolver) lookup(ctx context.Context, name string, qtype dnsmessage.Type, conf *dnsConfig) (dnsmessage.Parser, string, error) {
	if !isDomainName(name) {
		// We used to use "invalid domain name" as the error,
		// but that is a detail of the specific lookup mechanism.
		// Other lookups might allow broader name syntax

	if err != nil {
		return "", nil, err
	}
	if cname != "" && !isDomainName(cname) {
		return "", nil, &DNSError{Err: "SRV header name is invalid", Name: name}
	}
	filteredAddrs := make([]*SRV, 0, len(addrs))
	for _, addr := range addrs {
		if addr == nil {
			continue
		}
		if !isDomainName(addr.Target) {
			continue
		}
		filteredAddrs = append(filteredAddrs, addr)
	}

	return t.Year() >= 1601
}

// isCookieDomainName reports whether s is a valid domain name or a valid
// domain name with a leading dot '.'.  It is almost a direct copy of
// package net's isDomainName.
func isCookieDomainName(s string) bool {
	if len(s) == 0 {
		return false
	}
	if len(s) > 255 {
		return false
	}

	if s[0] == '.' {

		}
		globalRootDiskThreshold = size
	}

	domains := env.Get(config.EnvDomain, "")
	if len(domains) != 0 {
		for _, domainName := range strings.Split(domains, config.ValueSeparator) {
			if _, ok := dns2.IsDomainName(domainName); !ok {
				logger.Fatal(config.ErrInvalidDomainValue(nil).Msg("Unknown value `%s`", domainName),
					"Invalid MINIO_DOMAIN value in environment variable")
			}