NPACKET_R
struct iovec wbuf[NPACKET_R];
bufreq.rx.npacket = NPACKET_R;
if (vec >= NPACKET_R) {
if (vec >= NPACKET_R) {
#define RBUFSIZE (PSIZE * NPACKET_R)
#define RBUFSIZE (PSIZE * NPACKET_R)
bufreq.rx.npacket = NPACKET_R;