DLT_CAN_SOCKETCAN
if (ifp->if_dlt != DLT_CAN_SOCKETCAN || csc == NULL)
if (ifp->if_dlt != DLT_CAN_SOCKETCAN || csc == NULL)
ifp->if_dlt = DLT_CAN_SOCKETCAN;
bpf_attach(ifp, DLT_CAN_SOCKETCAN, 0);
canp->canp_ifp->if_dlt != DLT_CAN_SOCKETCAN) {