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authorChristopher Speller <crspeller@gmail.com>2018-04-16 05:37:14 -0700
committerJoram Wilander <jwawilander@gmail.com>2018-04-16 08:37:14 -0400
commit6e2cb00008cbf09e556b00f87603797fcaa47e09 (patch)
tree3c0eb55ff4226a3f024aad373140d1fb860a6404 /vendor/github.com/miekg/dns/dnsutil/util.go
parentbf24f51c4e1cc6286885460672f7f449e8c6f5ef (diff)
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Depenancy upgrades and movign to dep. (#8630)
Diffstat (limited to 'vendor/github.com/miekg/dns/dnsutil/util.go')
-rw-r--r--vendor/github.com/miekg/dns/dnsutil/util.go83
1 files changed, 0 insertions, 83 deletions
diff --git a/vendor/github.com/miekg/dns/dnsutil/util.go b/vendor/github.com/miekg/dns/dnsutil/util.go
deleted file mode 100644
index 76ac4de66..000000000
--- a/vendor/github.com/miekg/dns/dnsutil/util.go
+++ /dev/null
@@ -1,83 +0,0 @@
-// Package dnsutil contains higher-level methods useful with the dns
-// package. While package dns implements the DNS protocols itself,
-// these functions are related but not directly required for protocol
-// processing. They are often useful in preparing input/output of the
-// functions in package dns.
-package dnsutil
-
-import (
- "strings"
-
- "github.com/miekg/dns"
-)
-
-// AddOrigin adds origin to s if s is not already a FQDN.
-// Note that the result may not be a FQDN. If origin does not end
-// with a ".", the result won't either.
-// This implements the zonefile convention (specified in RFC 1035,
-// Section "5.1. Format") that "@" represents the
-// apex (bare) domain. i.e. AddOrigin("@", "foo.com.") returns "foo.com.".
-func AddOrigin(s, origin string) string {
- // ("foo.", "origin.") -> "foo." (already a FQDN)
- // ("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)
-
- if dns.IsFqdn(s) {
- return s // s is already a FQDN, no need to mess with it.
- }
- if len(origin) == 0 {
- return s // Nothing to append.
- }
- if s == "@" || len(s) == 0 {
- return origin // Expand apex.
- }
- if origin == "." {
- 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 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 "@"
- }
- // Someone is using TrimDomainName(s, ".") to remove a dot if it exists.
- if origin == "." {
- return strings.TrimSuffix(s, origin)
- }
-
- original := s
- s = dns.Fqdn(s)
- origin = dns.Fqdn(origin)
-
- if !dns.IsSubDomain(origin, s) {
- return original
- }
-
- slabels := dns.Split(s)
- olabels := dns.Split(origin)
- m := dns.CompareDomainName(s, origin)
- if len(olabels) == m {
- if len(olabels) == len(slabels) {
- return "@" // origin == s
- }
- if (s[0] == '.') && (len(slabels) == (len(olabels) + 1)) {
- return "@" // TrimDomainName(".foo.", "foo.")
- }
- }
-
- // Return the first (len-m) labels:
- return s[:slabels[len(slabels)-m]-1]
-}