-int gw_udp_recv( void* data );
-void gw_udp_send( struct can_frame* cf );
-int gw_can_recv( void* data );
-void gw_can_send( struct can_frame* cf );
-
+static int gw_udp_recv( void* data );
+static void gw_udp_send( struct can_frame* cf, struct in_addr ipaddr, u16 port );
+static int gw_can_recv( void* data );
+static void gw_can_send( struct can_frame* cf, int ifidx );