bpf_mtap
bpf_mtap(ifp, m_head);
bpf_mtap(ifp->if_bpf, m_head);
bpf_mtap(arg, (struct mbuf *) &mh);
bpf_mtap(bp, &mb);
void bpf_mtap(struct bpf_if *, struct mbuf *);
bpf_mtap((_ifp)->if_bpf, (_m)); \
bpf_mtap((_ifp)->if_bpf, (_m)); \
bpf_mtap(ifp->if_bpf, m);
bpf_mtap(ifp->if_bpf, m);
bpf_mtap(ifp->if_bpf, top);
bpf_mtap(bifp->if_bpf, m);