/
ip.go
106 lines (87 loc) · 1.8 KB
/
ip.go
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package okutil
import (
"io/ioutil"
"net"
"net/http"
"strconv"
"strings"
)
// GetExternalIP 获取本服务器的外网IP
func GetExternalIP() (string, error) {
resp, err := http.Get("https://ifconfig.io/ip")
if err != nil {
return "", err
}
defer resp.Body.Close()
resultBytes, err := ioutil.ReadAll(resp.Body)
if err != nil {
return "", err
}
return strings.TrimSpace(string(resultBytes)), nil
}
// GetIntranetIP 获取本机IP
func GetIntranetIP() (ips []string, err error) {
ips = make([]string, 0)
ifaces, e := net.Interfaces()
if e != nil {
return ips, e
}
for _, iface := range ifaces {
if iface.Flags&net.FlagUp == 0 {
continue // interface down
}
if iface.Flags&net.FlagLoopback != 0 {
continue // loopback interface
}
// ignore docker and warden bridge
if strings.HasPrefix(iface.Name, "docker") || strings.HasPrefix(iface.Name, "w-") {
continue
}
addrs, e := iface.Addrs()
if e != nil {
return ips, e
}
for _, addr := range addrs {
var ip net.IP
switch v := addr.(type) {
case *net.IPNet:
ip = v.IP
case *net.IPAddr:
ip = v.IP
}
if ip == nil || ip.IsLoopback() {
continue
}
ip = ip.To4()
if ip == nil {
continue // not an ipv4 address
}
ipStr := ip.String()
if IsIntranet(ipStr) {
ips = append(ips, ipStr)
}
}
}
return ips, nil
}
// IsIntranet IsIntranet
func IsIntranet(ipStr string) bool {
if strings.HasPrefix(ipStr, "10.") || strings.HasPrefix(ipStr, "192.168.") {
return true
}
if strings.HasPrefix(ipStr, "172.") {
// 172.16.0.0-172.31.255.255
arr := strings.Split(ipStr, ".")
if len(arr) != 4 {
return false
}
second, err := strconv.ParseInt(arr[1], 10, 64)
if err != nil {
return false
}
if second >= 16 && second <= 31 {
return true
}
}
return false
}