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filter loopback ip #153

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merged 1 commit into from
Nov 30, 2020
Merged

filter loopback ip #153

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27 changes: 19 additions & 8 deletions util/common.go
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Original file line number Diff line number Diff line change
Expand Up @@ -69,20 +69,31 @@ var localIP = ""

func LocalIP() string {
if localIP == "" {
addrs, err := net.InterfaceAddrs()
netInterfaces, err := net.Interfaces()
if err != nil {
logger.Errorf("get InterfaceAddress failed,err:%+v", err)
logger.Errorf("get Interfaces failed,err:%+v", err)
return ""
}
for _, address := range addrs {
if ipnet, ok := address.(*net.IPNet); ok && !ipnet.IP.IsLoopback() {
if ipnet.IP.To4() != nil {
localIP = ipnet.IP.String()
logger.Infof("InitLocalIp, LocalIp:%s", localIP)
break

for i := 0; i < len(netInterfaces); i++ {
if ((netInterfaces[i].Flags & net.FlagUp) != 0) && ((netInterfaces[i].Flags & net.FlagLoopback) == 0) {
addrs, err := netInterfaces[i].Addrs()
if err != nil {
logger.Errorf("get InterfaceAddress failed,err:%+v", err)
return ""
}
for _, address := range addrs {
if ipnet, ok := address.(*net.IPNet); ok && !ipnet.IP.IsLoopback() && ipnet.IP.To4() != nil {
localIP = ipnet.IP.String()
break
}
}
}
}

if len(localIP) > 0 {
logger.Infof("Local IP:%s", localIP)
}
}
return localIP
}
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