} device_type_t;
int device_fd = -1;
-device_type_t device_type;
+static device_type_t device_type;
char *device;
char *iface;
char ifrname[IFNAMSIZ];
char *device_info;
-int device_total_in = 0;
-int device_total_out = 0;
+static int device_total_in = 0;
+static int device_total_out = 0;
bool setup_device(void)
{