UDP_STAT_IPACKETS
UDP_STATINC(UDP_STAT_IPACKETS);
p(UDP_STAT_IPACKETS, "\t%" PRIu64 " datagram%s received\n");
delivered = udpstat[UDP_STAT_IPACKETS] -
SHOW(u[UDP_STAT_IPACKETS], 9, 35);
ADJINETCTR(curstat, oldstat, newstat, u[UDP_STAT_IPACKETS]);