DLT_NULL
bpfattach(ifp, DLT_NULL, ICHDRLEN);
bpfattach(ifp, DLT_NULL, sizeof(u_int32_t));
bpfattach(ifp, DLT_NULL, sizeof(uint32_t));
bpfattach(ifp, DLT_NULL, sizeof(u_int32_t));
bpfattach(GIF2IFP(sc), DLT_NULL, sizeof(u_int32_t));
bpfattach(GRE2IFP(sc), DLT_NULL, sizeof(u_int32_t));
bpfattach(ifp, DLT_NULL, sizeof(uint32_t));
bpfattach(ifp, DLT_NULL, sizeof(u_int32_t));
bpfattach(ME2IFP(sc), DLT_NULL, sizeof(u_int32_t));
bpfattach(ifp, DLT_NULL, sizeof(uint32_t));
bpfattach(ifp, DLT_NULL, sizeof(u_int32_t));
bpfattach(ifp, DLT_NULL, sizeof(u_int32_t));
bpfattach(ifp, DLT_NULL, sizeof(u_int32_t));
case DLT_NULL: