in dp_check/dp_check.go [208:216]
func skipLoopback(iface net.Interface) error {
if iface.Flags&net.FlagLoopback != 0 {
return fmt.Errorf("interface has loopback flag")
}
if iface.Flags&net.FlagUp != net.FlagUp {
return fmt.Errorf("interface is not marked up")
}
return nil
}