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我正在开发一个可以分析ip pacakge的工具，但是我发现当ip包的总长度大于1500时，wireshark会在原始数据文件中显示长度为0。![wireshark 快照][wireshark 快照]
这可能是传输时大段卸载或接收时大接收卸载的结果；这些数据包可能对应于线路上的多个 IP 数据报和多个 TCP 段。