diff options
Diffstat (limited to 'vendor/github.com/miekg/dns/dnsutil/util.go')
-rw-r--r-- | vendor/github.com/miekg/dns/dnsutil/util.go | 18 |
1 files changed, 11 insertions, 7 deletions
diff --git a/vendor/github.com/miekg/dns/dnsutil/util.go b/vendor/github.com/miekg/dns/dnsutil/util.go index c8c6af7b3..76ac4de66 100644 --- a/vendor/github.com/miekg/dns/dnsutil/util.go +++ b/vendor/github.com/miekg/dns/dnsutil/util.go @@ -20,7 +20,9 @@ import ( func AddOrigin(s, origin string) string { // ("foo.", "origin.") -> "foo." (already a FQDN) // ("foo", "origin.") -> "foo.origin." - // ("foo"), "origin" -> "foo.origin" + // ("foo", "origin") -> "foo.origin" + // ("foo", ".") -> "foo." (Same as dns.Fqdn()) + // ("foo.", ".") -> "foo." (Same as dns.Fqdn()) // ("@", "origin.") -> "origin." (@ represents the apex (bare) domain) // ("", "origin.") -> "origin." (not obvious) // ("foo", "") -> "foo" (not obvious) @@ -34,32 +36,34 @@ func AddOrigin(s, origin string) string { if s == "@" || len(s) == 0 { return origin // Expand apex. } - if origin == "." { - return s + origin // AddOrigin(s, ".") is an expensive way to add a ".". + return dns.Fqdn(s) } return s + "." + origin // The simple case. } // TrimDomainName trims origin from s if s is a subdomain. -// This function will never return "", but returns "@" instead (@ represents the apex (bare) domain). +// This function will never return "", but returns "@" instead (@ represents the apex domain). func TrimDomainName(s, origin string) string { // An apex (bare) domain is always returned as "@". // If the return value ends in a ".", the domain was not the suffix. // origin can end in "." or not. Either way the results should be the same. if len(s) == 0 { - return "@" // Return the apex (@) rather than "". + return "@" } // Someone is using TrimDomainName(s, ".") to remove a dot if it exists. if origin == "." { return strings.TrimSuffix(s, origin) } - // Dude, you aren't even if the right subdomain! + original := s + s = dns.Fqdn(s) + origin = dns.Fqdn(origin) + if !dns.IsSubDomain(origin, s) { - return s + return original } slabels := dns.Split(s) |