NFORWARD
entry = xid % (u_int32_t)NFORWARD;
static struct finfo FINFO[NFORWARD];
lastxid = time_now * NFORWARD;
for (i = 0; i < NFORWARD; i++) {
lastxid = lastxid + NFORWARD;
if ((u_int32_t)(lastxid + NFORWARD) <= NFORWARD)
lastxid = NFORWARD;
i = reply_xid % (u_int32_t)NFORWARD;