PFLOW_SET_HDRLEN
m_copyback(sc->sc_mbuf_nat, PFLOW_SET_HDRLEN +
m_copyback(sc->sc_mbuf, PFLOW_SET_HDRLEN +
m_copyback(sc->sc_mbuf6, PFLOW_SET_HDRLEN +
m_copyback(m, 0, PFLOW_SET_HDRLEN, &set_hdr, M_NOWAIT);