MAX_SACK_BLK
sack_blk_t tmp[MAX_SACK_BLK];
sack_blk_t tmp[MAX_SACK_BLK - 1];
if (old_num > MAX_SACK_BLK - 1) {
old_num = MAX_SACK_BLK - 1;
sack_blk_t tcp_sack_list[MAX_SACK_BLK]; /* the sack list */
sack_blk_t tmp[MAX_SACK_BLK];
sack_blk_t tmp[MAX_SACK_BLK - 1];
if (old_num > MAX_SACK_BLK - 1) {
old_num = MAX_SACK_BLK - 1;
sack_blk_t tcp_sack_list[MAX_SACK_BLK]; /* the sack list */