typedef struct _opkg_progress_data_t opkg_progress_data_t;
typedef void (*opkg_progress_callback_t) (const opkg_progress_data_t *progress, void *user_data);
typedef struct _opkg_progress_data_t opkg_progress_data_t;
typedef void (*opkg_progress_callback_t) (const opkg_progress_data_t *progress, void *user_data);