| /* |
| Licensed to the Apache Software Foundation (ASF) under one or more |
| contributor license agreements. See the NOTICE file distributed with |
| this work for additional information regarding copyright ownership. |
| The ASF licenses this file to You 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 ( |
| "net" |
| "strings" |
| ) |
| |
| //GetIp4Bytes get ip4 byte array |
| func GetIp4Bytes() (ret []byte) { |
| ip := getIp() |
| ret = ip[len(ip)-4:] |
| return |
| } |
| |
| //GetLocalIp4 get local ip4 |
| func GetLocalIp4() (ip4 string) { |
| ip := getIp() |
| if ip.To4() != nil { |
| currIp := ip.String() |
| if !strings.Contains(currIp, ":") && currIp != "127.0.0.1" && isIntranetIpv4(currIp) { |
| ip4 = currIp |
| } |
| } |
| return |
| } |
| func getIp() (ip net.IP) { |
| interfaces, err := net.Interfaces() |
| if err != nil { |
| return |
| } |
| |
| for _, face := range interfaces { |
| if strings.Contains(face.Name, "lo") { |
| continue |
| } |
| addrs, err := face.Addrs() |
| if err != nil { |
| return |
| } |
| |
| for _, addr := range addrs { |
| if ipnet, ok := addr.(*net.IPNet); ok && !ipnet.IP.IsLoopback() { |
| if ipnet.IP.To4() != nil { |
| currIp := ipnet.IP.String() |
| if !strings.Contains(currIp, ":") && currIp != "127.0.0.1" && isIntranetIpv4(currIp) { |
| ip = ipnet.IP |
| } |
| } |
| } |
| } |
| } |
| return |
| } |
| func isIntranetIpv4(ip string) bool { |
| if strings.HasPrefix(ip, "192.168.") || strings.HasPrefix(ip, "169.254.") { |
| return true |
| } |
| return false |
| } |