125 lines
2.3 KiB
Go
125 lines
2.3 KiB
Go
/*
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Copyright 2021 Alibaba Group Holding Limited.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package network
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import (
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"errors"
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"net"
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)
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func preferIface(iface net.Interface) bool {
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return iface.Name == "en0" || iface.Name == "eth0"
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}
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func getTheFirstIPv4IP(iface net.Interface) (net.IP, error) {
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// ignore interface not up
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if (iface.Flags & net.FlagUp) == 0 {
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return nil, nil
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}
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addrs, err := iface.Addrs()
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if err != nil {
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return nil, err
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}
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for _, addr := range addrs {
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var ip net.IP
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switch v := addr.(type) {
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case *net.IPNet:
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ip = v.IP
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case *net.IPAddr:
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ip = v.IP
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}
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if ip == nil {
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continue
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}
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if ip = ip.To4(); ip == nil {
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// ignore IPv6 addresses
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continue
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}
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if !ip.IsLoopback() {
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return ip, nil
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}
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}
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return nil, nil
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}
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// GetLocalIP get the local IPv4 ip
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func GetLocalIP() (net.IP, error) {
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interfaces, err := net.Interfaces()
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if err != nil {
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return nil, err
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}
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// find preferred interface
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for _, iface := range interfaces {
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if preferIface(iface) {
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ip, err := getTheFirstIPv4IP(iface)
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if err != nil || ip != nil {
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return ip, err
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}
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}
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}
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for _, iface := range interfaces {
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ip, err := getTheFirstIPv4IP(iface)
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if err != nil || ip != nil {
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return ip, err
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}
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}
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return nil, errors.New("no non-loopback ip found")
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}
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func GetOutBoundIp() (net.IP, error) {
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conn, err := net.Dial("udp", "8.8.8.8:80")
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if err != nil {
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return nil, err
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}
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defer conn.Close()
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localAddr := conn.LocalAddr().(*net.UDPAddr)
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return localAddr.IP, nil
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}
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func GetDefaultPort() int32 {
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return 3306
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}
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func GetXPort(port int32) int32 {
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// TODO: check the port
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return port + 28000
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}
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func GetPaxosPort(port int32) int32 {
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// TODO: check the port
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return port + 8000
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}
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func GetDefaultPaxosPort() int32 {
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return GetPaxosPort(GetDefaultPort())
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}
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func GetDefaultXPort() int32 {
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return GetXPort(GetDefaultPort())
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}
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