nop_in
nop_in_t *nop_in = &pp->ipdu.nop_in;
sdebug(5, "itt=%x ttt=%x", htonl(nop_in->itt), htonl(nop_in->ttt));
if(nop_in->itt == -1) {
if(nop_in->ttt != -1) {
if(nop_in->ttt == -1) {
if(nop_in->itt != -1) {
nop_in_t nop_in;