int app_worker_connect_notify (app_worker_t * app_wrk, session_t * s,
session_error_t err, u32 opaque);
int app_worker_add_half_open (app_worker_t *app_wrk, session_handle_t sh);
-int app_worker_del_half_open (app_worker_t *app_wrk, u32 ho_index);
+int app_worker_del_half_open (app_worker_t *app_wrk, session_t *s);
int app_worker_close_notify (app_worker_t * app_wrk, session_t * s);
int app_worker_transport_closed_notify (app_worker_t * app_wrk,
session_t * s);