确定网络数据包结构
该在线社区的成员有一个旧程序可供所有人使用，但他已不再存在并且不再支持该程序。我想通过稍微扩展它的功能来帮助社区。为此，我需要知道如何从它发送数据。如何捕获它发送的网络流量并确定它发送的内容？
There is an old program a member of this online community made for everyone to use, but he is no longer around and no longer supports it. I wanted to help the community by extending it's features somewhat. To do that, I need to know how data is sent from it. How can I capture the network traffic it sends, and determine what it's sending?
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WireShark 是您的朋友。适用于 UNIX 和 Windows。
Wireshark 用户指南
@Kerrek SB 的提示：使用
tcpdump -s0 -w /tmp/data -i eth3左右创建转储文件，稍后以非特权用户身份使用 Wireshark 对其进行分析。WireShark is your friend. Available for UNIX and Windows.
Wireshark User's Guide
@Kerrek SB's Tip: use
tcpdump -s0 -w /tmp/data -i eth3or so to create the dump file, and analyze it with Wireshark later as an unprivileged user.