sockets - 如何解码Websocket数据包?

标签 sockets tcp websocket decode

我正在使用Wireshark数据包分析器,当我过滤所有“Websocket”数据包时,我会看到我正在发送/接收到主机的数据。当我检查单个数据包时,我的数据包始终显示为[MASKED],但是您可以使用'Umask Payload',以明文形式显示数据,如下所示:

<IC sid="52ccc752-6080-4668-8f55-662020d83979" msqid="120l93l9l114l30l104"/>

但是,如果我遵循TCP流并查看同一数据包,则数据将以如下所示的方式显示为已编码:
....K#....../...y@..|...}...f...s...~...}...{G..r...kN.."G..z...r...'...'...z...d.

问题是我从主机收到的所有Websocket数据包都是经过编码的,不是SSL,我不知道如何解码它们,我也不知道它们甚至被编码为什么(但是我的浏览器可以对其进行解码) 。

我认为无论使用哪种方法将它们作为编码数据返回给我,都与使用“跟随TCP流”时对数据进行编码的方法相同。

有人可以帮我弄清楚如何解码主机发送给我的数据吗?请参阅下面的主机数据
~.^jVpZc9y4Ef4ryFQ5+yJpeB+JJJdmNPI6G++mrN249kkFkuChIQmG5Fgj//p0AyAJypzxyi5T6P76
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ZWTL2+aKkLuyJJ8R2pHPrGPtV5ZcgRIXNVLoF6vh62tpkToy9LIzexnxvRydWEY8lhGPZRxjGccY
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3rw/QJ9u3v3xuPv8DhSsUw/+ocHtdeKRDNz0wF4GfjpesJrM+CQDx5ACHtFkHdG6Zq159dxkQLPO
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6YAq2ClvCc1YNyn+gnYm+bxIEsD2kHCMJPS1e080KO1/6sih+Z6W06ZhNbr1HatmL5ND9+g6yThP
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kOkz0NyKvRrOLg3vaHmqdir2+fKpgxZXRhxd2OjkcEok20Pb0+JU0GLJ/eGYv8UtDg6sCjWDulSe
7B4CniIA/Gh90GHLtvietafMIO+8hRHxJofVpuj3HPt6Mo17ZJ81MCGWty6HumOnNkadYJ6fJRNk
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4gRh0OwPpkbEvDoooqVU67UCC92I3A/9sUTyPqk6FE2+4N5D44x3N8Y0lk8R73teTQdV2EpHfHMA
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9CTwyOgcZdpLqEaew3SgFSwAN5wqxyL4bQHwiVHop4RU4vclc3A2Ge11srEIg0nPaJwPQNVc8usV
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phn5lhVYNAlTljoueiItwy8ft7f/Bw==

最佳答案

客户端到服务器的数据与掩码(包含在数据帧中)进行异或。有人建议这样做是为了摆脱不良的缓存机制,以旧 session 中的服务器消息响应新的Websocket请求。屏蔽可确保即使包含相同数据的消息对于不了解websocket的应用程序也会以不同的方式出现。

另请注意, header 本身有许多不同的大小选项。

关于sockets - 如何解码Websocket数据包?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/33426243/

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