[Master][bug]utils.LocalIp sometimes is a looback ip #637
Description
Sometimes value of utils.LocalIp is a loopback ip, cause in line 48:!ipnet.IP.IsLoopback() is only hit ip like 127.* or ::1
If some of server's net interface is a loopback interface, value of utils.LocalIp might be a loopback ip(which is not like 127.*)
https://github.com/apache/rocketmq-client-go/blob/master/internal/utils/net.go#L29-L54
so i think ClientIP4() should filter lookback interface first like this:
func GetLocalServerIp() (string, error) {
if ifaceSlice, err := net.Interfaces(); err == nil && ifaceSlice != nil {
for _, iface := range ifaceSlice {
if iface.Flags&net.FlagLoopback != 0 {
continue // loopback interface
}
if iface.Flags&net.FlagUp == 0 {
continue // interface down
}
if tmpAddrSlice, err := iface.Addrs(); err == nil && tmpAddrSlice != nil {
for _, address := range tmpAddrSlice {
if ipNet, ok := address.(*net.IPNet); ok && !ipNet.IP.IsLoopback() {
if ipNet.IP.To4() != nil {
return ipNet.IP.String(), nil
}
}
}
}
}
}
return "", fmt.Errorf("ip not found")
}