typedef char* (*opkg_response_callback)(char *question);
typedef void (*opkg_download_progress_callback)(int percent, char *url);
typedef void (*opkg_state_changed_callback)(opkg_state_t state, const char *data);
typedef char* (*opkg_response_callback)(char *question);
typedef void (*opkg_download_progress_callback)(int percent, char *url);
typedef void (*opkg_state_changed_callback)(opkg_state_t state, const char *data);