LDC_RTS
if (((ctrlmsg & LDC_CTRL_MASK) != LDC_RTS) &&
msg->ctrl == LDC_RTS ||
pkt->ctrl = LDC_RTS;
rv = i_ldc_send_pkt(ldcp, LDC_CTRL, LDC_NACK, LDC_RTS);
case LDC_RTS: