tcp_softtso_chop
error = tcp_softtso_chop(&ml, m, encif, len);
if ((error = tcp_softtso_chop(&ml, *mp, ifp, (*mp)->m_pkthdr.ph_mss)) ||
int tcp_softtso_chop(struct mbuf_list *, struct mbuf *, struct ifnet *,
error = tcp_softtso_chop(&ml, m, encif, len);