-int udev_ctrl_send_set_log_level(struct udev_ctrl *uctrl, int priority);
-int udev_ctrl_send_stop_exec_queue(struct udev_ctrl *uctrl);
-int udev_ctrl_send_start_exec_queue(struct udev_ctrl *uctrl);
-int udev_ctrl_send_reload_rules(struct udev_ctrl *uctrl);
-int udev_ctrl_send_settle(struct udev_ctrl *uctrl);
-int udev_ctrl_send_set_env(struct udev_ctrl *uctrl, const char *key);
-int udev_ctrl_send_set_children_max(struct udev_ctrl *uctrl, int count);
+int udev_ctrl_send_set_log_level(struct udev_ctrl *uctrl, int priority, int timeout);
+int udev_ctrl_send_stop_exec_queue(struct udev_ctrl *uctrl, int timeout);
+int udev_ctrl_send_start_exec_queue(struct udev_ctrl *uctrl, int timeout);
+int udev_ctrl_send_reload_rules(struct udev_ctrl *uctrl, int timeout);
+int udev_ctrl_send_ping(struct udev_ctrl *uctrl, int timeout);
+int udev_ctrl_send_exit(struct udev_ctrl *uctrl, int timeout);
+int udev_ctrl_send_set_env(struct udev_ctrl *uctrl, const char *key, int timeout);
+int udev_ctrl_send_set_children_max(struct udev_ctrl *uctrl, int count, int timeout);
+struct udev_ctrl_connection;
+struct udev_ctrl_connection *udev_ctrl_get_connection(struct udev_ctrl *uctrl);
+struct udev_ctrl_connection *udev_ctrl_connection_ref(struct udev_ctrl_connection *conn);
+struct udev_ctrl_connection *udev_ctrl_connection_unref(struct udev_ctrl_connection *conn);