另一感兴趣的数据是在处理SACK时扫描的包的数目，以及重传窗口(window)的平均大小。
It is also interesting to count the number of packets scanned while processing the SACKs, and the average size of the retransmission window.
特定于Linux SACK处理器的攻击场景要求重传队列中已经持有大量包。
The specific attack scenario for a Linux SACK processor requires a retransmission queue that already holds large Numbers of packets.
如果在客户机可以跟踪发出的SACK选项的数目，则重传队列的大小可从扫描包计数器中计算得到。
The average size of the retransmit queue can be calculated from the packets scanned counter if the number of SACK options sent is also tracked at the client.
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