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moby--moby/libnetwork/resolvconf/dns/resolvconf.go

17 lines
478 B
Go

package dns
import (
"regexp"
)
// IPLocalhost is a regex patter for localhost IP address range.
const IPLocalhost = `((127\.([0-9]{1,3}\.){2}[0-9]{1,3})|(::1))`
var localhostIPRegexp = regexp.MustCompile(IPLocalhost)
// IsLocalhost returns true if ip matches the localhost IP regular expression.
// Used for determining if nameserver settings are being passed which are
// localhost addresses
func IsLocalhost(ip string) bool {
return localhostIPRegexp.MatchString(ip)
}