COUNTER_PAIR
if (statlen < COUNTER_PAIR)
statlen -= COUNTER_PAIR;
if (len < COUNTER_PAIR)
len -= COUNTER_PAIR;
if (len < COUNTER_PAIR)
len -= COUNTER_PAIR;
if (len < COUNTER_PAIR)
len -= COUNTER_PAIR;
if (len < (COUNTER_PAIR + COUNTER_32BIT))