DLT_NULL
hdr.linktype = DLT_NULL;
ifp->if_dlt = DLT_NULL;
bpf_attach(ifp, DLT_NULL, sizeof(u_int32_t));
ifp->if_dlt = DLT_NULL;
case DLT_NULL:
if (linktype == DLT_NULL && ifp->if_type == IFT_LOOP) {
ifp->if_dlt = DLT_NULL;
bpf_attach(ifp, DLT_NULL, sizeof(u_int));
sc->gif_if.if_dlt = DLT_NULL;
bpf_attach(&sc->gif_if, DLT_NULL, sizeof(u_int));
sc->sc_if.if_dlt = DLT_NULL;
bpf_attach(&sc->sc_if, DLT_NULL, sizeof(uint32_t));
sc->ipsec_if.if_dlt = DLT_NULL;
bpf_attach(&sc->ipsec_if, DLT_NULL, sizeof(u_int));
sc->l2tp_ec.ec_if.if_dlt = DLT_NULL;
ifp->if_dlt = DLT_NULL;
bpf_attach(ifp, DLT_NULL, sizeof(u_int));
sc->sc_if.if_dlt = DLT_NULL;
bpf_attach(&sc->sc_if, DLT_NULL, sizeof(uint32_t));
sc->sc_if.if_dlt = DLT_NULL;
bpf_attach(&sc->sc_if, DLT_NULL, 0);
sc->sc_if.if_dlt = DLT_NULL;
bpf_attach(&sc->sc_if, DLT_NULL, sizeof(u_int));
ifp->if_dlt = DLT_NULL;
bpf_attach(ifp, DLT_NULL, sizeof(uint32_t));
ifp->if_dlt = DLT_NULL;
wg->wg_if.if_dlt = DLT_NULL;
bpf_attach(&wg->wg_if, DLT_NULL, sizeof(uint32_t));
ifp->if_dlt = DLT_NULL;
bpf_change_type(&sc->sc_if, DLT_NULL, 0);
bpf_attach(&sockin_if, DLT_NULL, 0);
dlt = DLT_NULL;