ipf_inobjsz
error = ipf_inobjsz(softc, data, f, IPFOBJ_FRENTRY,
extern int ipf_inobjsz(ipf_main_softc_t *, void *, void *,
error = ipf_inobjsz(softc, data, nt, IPFOBJ_IPNAT,
error = ipf_inobjsz(softc, data, ipnn, IPFOBJ_NATSAVE,