COOKIEBITS
sseq + (count << COOKIEBITS) +
diff = (count - (cookie >> COOKIEBITS)) & ((__u32) -1 >> COOKIEBITS);
#define COOKIEMASK (((__u32)1 << COOKIEBITS) - 1)
#define COOKIEMASK (((__u32)1 << COOKIEBITS) - 1)
sseq + (count << COOKIEBITS) +
diff = (count - (cookie >> COOKIEBITS)) & ((__u32) -1 >> COOKIEBITS);