DSCP_MASK
pktinfo.pkt_dscp = (ntohl(flowlabel) >> 20) & DSCP_MASK;
pktinfo.pkt_dscp = ip->ip_tos & DSCP_MASK;
(flowlabel & ~(DSCP_MASK << 20));
ktca->tca_dscp &= DSCP_MASK;
tcm->green_dscp = tcm->green_action.tca_dscp & DSCP_MASK;
tcm->yellow_dscp = tcm->yellow_action.tca_dscp & DSCP_MASK;
tcm->red_dscp = tcm->red_action.tca_dscp & DSCP_MASK;
tsw->green_dscp = tsw->green_action.tca_dscp & DSCP_MASK;
tsw->yellow_dscp = tsw->yellow_action.tca_dscp & DSCP_MASK;
tsw->red_dscp = tsw->red_action.tca_dscp & DSCP_MASK;
dsfield &= ~DSCP_MASK;