PF_SKIP_IFP
{ "ifp", PF_SKIP_IFP, skip_cmp_ifp }, \
PF_SET_SKIP_STEPS(PF_SKIP_IFP);
r->skip[PF_SKIP_IFP]);
r->skip[PF_SKIP_IFP]);
r = r->skip[PF_SKIP_IFP];
r = r->skip[PF_SKIP_IFP];
r = r->skip[PF_SKIP_IFP];
r = r->skip[PF_SKIP_IFP];