PF_SKIP_PROTO
{ "proto", PF_SKIP_PROTO, skip_cmp_proto }, \
PF_SET_SKIP_STEPS(PF_SKIP_PROTO);
r->skip[PF_SKIP_PROTO]);
r->skip[PF_SKIP_PROTO]);
r = r->skip[PF_SKIP_PROTO];
r = r->skip[PF_SKIP_PROTO];
r = r->skip[PF_SKIP_PROTO];
r = r->skip[PF_SKIP_PROTO];