ATM_HDR_VPI_SHIFT
tpd->atm_header.vpi = (*cell_header & ATM_HDR_VPI_MASK) >> ATM_HDR_VPI_SHIFT;
(rpd->atm_header.vpi << ATM_HDR_VPI_SHIFT) |
aal0 = (vpi << ATM_HDR_VPI_SHIFT) |
vpi = (header & ATM_HDR_VPI_MASK) >> ATM_HDR_VPI_SHIFT;
((vcc->vpi << ATM_HDR_VPI_SHIFT) |