PF_DUPTO
$$.rt = PF_DUPTO;
else if (r->rt == PF_DUPTO)
if (r->rt == PF_DUPTO) {
if (r->rt != PF_DUPTO) {
if (r->rt != PF_DUPTO)
if (r->rt == PF_DUPTO) {
if (r->rt != PF_DUPTO)
if (r->rt != PF_DUPTO)