ibnex_dm_callback
ibdm_ibnex_register_callback(ibnex_dm_callback);
void ibnex_dm_callback(void *, ibdm_events_t);
ibdm_ibnex_register_callback(ibdm_callback_t ibnex_dm_callback)
ibdm.ibdm_ibnex_callback = ibnex_dm_callback;