DLT_NULL          155 net/bpf.c      	case DLT_NULL:
DLT_NULL          115 net/if_faith.c 	bpfattach(&ifp->if_bpf, ifp, DLT_NULL, sizeof(u_int));
DLT_NULL          115 net/if_gif.c   	bpfattach(&sc->gif_if.if_bpf, &sc->gif_if, DLT_NULL,
DLT_NULL          162 net/if_gre.c   	bpfattach(&sc->sc_if.if_bpf, &sc->sc_if, DLT_NULL,