Before running the script, you need to edit following lines in its header, as shown in Listing 6.
在运行脚本之前，需要编辑脚本文件头部的以下几行，如清单6所示。
In its header, each packet also carries the IP address of the final destination.
在报头中，每个包也携带最终目的地ip地址。
In its header, each packet also carries the IP address of the final destination.
在报头中，每个包也携带最终目的地ip地址。
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