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mapping.go
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mapping.go
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/*
* Copyright 2019 SAP SE or an SAP affiliate company. All rights reserved. This file is licensed under the Apache Software License, v. 2 except as noted otherwise in the LICENSE file
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
*
*/
package dns
import (
"strings"
)
////////////////////////////////////////////////////////////////////////////////
// Text Record ObjectName Mapping
////////////////////////////////////////////////////////////////////////////////
var TxtPrefix = "comment-"
func AlignHostname(host string) string {
if strings.HasSuffix(host, ".") {
return host
}
return host + "."
}
func NormalizeHostname(host string) string {
if strings.HasPrefix(host, "\\052.") {
host = "*" + host[4:]
}
if strings.HasSuffix(host, ".") {
return host[:len(host)-1]
}
return host
}
func MapToProvider(rtype string, dnsset *DNSSet, base string) (string, *RecordSet) {
name := dnsset.Name
rs := dnsset.Sets[rtype]
if rtype == RS_META {
prefix := dnsset.GetAttr(ATTR_PREFIX)
if prefix == "" {
prefix = TxtPrefix
dnsset.SetAttr(ATTR_PREFIX, prefix)
}
new := *dnsset.Sets[rtype]
new.Type = RS_TXT
add := ""
if strings.HasPrefix(name, "*.") {
add = "*."
name = name[2:]
if name == base {
prefix += "-base."
}
}
return add + prefix + name, &new
}
return name, rs
}
func MapFromProvider(dns string, rs *RecordSet) (string, *RecordSet) {
if rs.Type == RS_TXT {
prefix := rs.GetAttr(ATTR_PREFIX)
if prefix != "" {
add := ""
if strings.HasPrefix(dns, "*.") {
add = "*."
dns = dns[2:]
}
if strings.HasPrefix(dns, prefix) {
new := *rs
new.Type = RS_META
dns = dns[len(prefix):]
if strings.HasPrefix(dns, "-base.") {
dns = dns[6:]
} else if strings.HasPrefix(dns, ".") {
// for backwards compatibility of form *.comment-.basedomain
dns = dns[1:]
}
return add + dns, &new
} else {
return add + dns, rs
}
}
}
return dns, rs
}