119 lines
2.9 KiB
Go
119 lines
2.9 KiB
Go
// Copyright 2015 CoreOS, Inc.
|
|
//
|
|
// 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 netutil implements network-related utility functions.
|
|
package netutil
|
|
|
|
import (
|
|
"net"
|
|
"net/url"
|
|
"reflect"
|
|
"sort"
|
|
|
|
"github.com/coreos/etcd/Godeps/_workspace/src/github.com/coreos/pkg/capnslog"
|
|
"github.com/coreos/etcd/pkg/types"
|
|
)
|
|
|
|
var (
|
|
plog = capnslog.NewPackageLogger("github.com/coreos/etcd/pkg", "netutil")
|
|
|
|
// indirection for testing
|
|
resolveTCPAddr = net.ResolveTCPAddr
|
|
)
|
|
|
|
// resolveTCPAddrs is a convenience wrapper for net.ResolveTCPAddr.
|
|
// resolveTCPAddrs return a new set of url.URLs, in which all DNS hostnames
|
|
// are resolved.
|
|
func resolveTCPAddrs(urls [][]url.URL) ([][]url.URL, error) {
|
|
newurls := make([][]url.URL, 0)
|
|
for _, us := range urls {
|
|
nus := make([]url.URL, len(us))
|
|
for i, u := range us {
|
|
nu, err := url.Parse(u.String())
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
nus[i] = *nu
|
|
}
|
|
for i, u := range nus {
|
|
host, _, err := net.SplitHostPort(u.Host)
|
|
if err != nil {
|
|
plog.Errorf("could not parse url %s during tcp resolving", u.Host)
|
|
return nil, err
|
|
}
|
|
if host == "localhost" {
|
|
continue
|
|
}
|
|
if net.ParseIP(host) != nil {
|
|
continue
|
|
}
|
|
tcpAddr, err := resolveTCPAddr("tcp", u.Host)
|
|
if err != nil {
|
|
plog.Errorf("could not resolve host %s", u.Host)
|
|
return nil, err
|
|
}
|
|
plog.Infof("resolving %s to %s", u.Host, tcpAddr.String())
|
|
nus[i].Host = tcpAddr.String()
|
|
}
|
|
newurls = append(newurls, nus)
|
|
}
|
|
return newurls, nil
|
|
}
|
|
|
|
// urlsEqual checks equality of url.URLS between two arrays.
|
|
// This check pass even if an URL is in hostname and opposite is in IP address.
|
|
func urlsEqual(a []url.URL, b []url.URL) bool {
|
|
if len(a) != len(b) {
|
|
return false
|
|
}
|
|
urls, err := resolveTCPAddrs([][]url.URL{a, b})
|
|
if err != nil {
|
|
return false
|
|
}
|
|
a, b = urls[0], urls[1]
|
|
sort.Sort(types.URLs(a))
|
|
sort.Sort(types.URLs(b))
|
|
for i := range a {
|
|
if !reflect.DeepEqual(a[i], b[i]) {
|
|
return false
|
|
}
|
|
}
|
|
|
|
return true
|
|
}
|
|
|
|
func URLStringsEqual(a []string, b []string) bool {
|
|
if len(a) != len(b) {
|
|
return false
|
|
}
|
|
urlsA := make([]url.URL, 0)
|
|
for _, str := range a {
|
|
u, err := url.Parse(str)
|
|
if err != nil {
|
|
return false
|
|
}
|
|
urlsA = append(urlsA, *u)
|
|
}
|
|
urlsB := make([]url.URL, 0)
|
|
for _, str := range b {
|
|
u, err := url.Parse(str)
|
|
if err != nil {
|
|
return false
|
|
}
|
|
urlsB = append(urlsB, *u)
|
|
}
|
|
|
|
return urlsEqual(urlsA, urlsB)
|
|
}
|