Add glide.yaml and vendor deps

vendor/k8s.io/kubernetes/pkg/dns/util/util.go

@@ -0,0 +1,89 @@
+/*
+Copyright 2016 The Kubernetes Authors.
+
+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
+limitations under the License.
+*/
+
+package util
+
+import (
+	"fmt"
+	"hash/fnv"
+	"strings"
+
+	"github.com/golang/glog"
+	"github.com/skynetservices/skydns/msg"
+)
+
+const (
+	// ArpaSuffix is the standard suffix for PTR IP reverse lookups.
+	ArpaSuffix = ".in-addr.arpa."
+	// defaultPriority used for service records
+	defaultPriority = 10
+	// defaultWeight used for service records
+	defaultWeight = 10
+	// defaultTTL used for service records
+	defaultTTL = 30
+)
+
+// extractIP turns a standard PTR reverse record lookup name
+// into an IP address
+func ExtractIP(reverseName string) (string, bool) {
+	if !strings.HasSuffix(reverseName, ArpaSuffix) {
+		return "", false
+	}
+	search := strings.TrimSuffix(reverseName, ArpaSuffix)
+
+	// reverse the segments and then combine them
+	segments := ReverseArray(strings.Split(search, "."))
+	return strings.Join(segments, "."), true
+}
+
+// ReverseArray reverses an array.
+func ReverseArray(arr []string) []string {
+	for i := 0; i < len(arr)/2; i++ {
+		j := len(arr) - i - 1
+		arr[i], arr[j] = arr[j], arr[i]
+	}
+	return arr
+}
+
+// Returns record in a format that SkyDNS understands.
+// Also return the hash of the record.
+func GetSkyMsg(ip string, port int) (*msg.Service, string) {
+	msg := NewServiceRecord(ip, port)
+	hash := HashServiceRecord(msg)
+	glog.V(5).Infof("Constructed new DNS record: %s, hash:%s",
+		fmt.Sprintf("%v", msg), hash)
+	return msg, fmt.Sprintf("%x", hash)
+}
+
+// NewServiceRecord creates a new service DNS message.
+func NewServiceRecord(ip string, port int) *msg.Service {
+	return &msg.Service{
+		Host:     ip,
+		Port:     port,
+		Priority: defaultPriority,
+		Weight:   defaultWeight,
+		Ttl:      defaultTTL,
+	}
+}
+
+// HashServiceRecord hashes the string representation of a DNS
+// message.
+func HashServiceRecord(msg *msg.Service) string {
+	s := fmt.Sprintf("%v", msg)
+	h := fnv.New32a()
+	h.Write([]byte(s))
+	return fmt.Sprintf("%x", h.Sum32())
+}