RX_RTR_FRAME
if (!(msg_head->flags & RX_RTR_FRAME))
if ((msg_head->flags & RX_RTR_FRAME) &&
if (op->flags & RX_RTR_FRAME) {
if (!(op->flags & RX_RTR_FRAME) &&
rtr_frame = op->flags & RX_RTR_FRAME;