CSG_SHIFT
c_phase = (hpdu->pduh_Flags >> CSG_SHIFT) & SG_MASK;
hpdu->pduh_Flags = FLAG_TRANSIT | (c_phase << CSG_SHIFT) |
(hpdu->pduh_Flags >> CSG_SHIFT) & SG_MASK,
c_phase = (rx_pdu->pdu_hdr.pduh_Flags >> CSG_SHIFT) & SG_MASK;
tx_pdu->pdu_hdr.pduh_Flags = c_phase << CSG_SHIFT;