fr_check
i = fr_check(ip, hlen, ifp, dir, &m, ifs);
rval = fr_check(fw->hpe_hdr, hlen, qpi.qpi_ill, out,
rval = fr_check(fw->hpe_hdr, hlen, qpi.qpi_ill, out,
extern int fr_check __P((struct ip *, int, void *, int, mb_t **, ipf_stack_t *));
extern int fr_check __P((struct ip *, int, void *, int, void *,
extern int fr_check __P((struct ip *, int, void *, int, mb_t **, ipf_stack_t *));