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fragattacks: clarify example pcaps

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Mathy Vanhoef 2021-05-11 18:59:52 +04:00
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example-pcaps/README.md
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# Example Packet Captures # Example Packet Captures
In all the following captures the Wi-Fi network is `testnetwork` with as password `abcdefgh`. The following captures are based on executing the test tool and **illustrate the root cause** of the vulnerabilities. In all captures the Wi-Fi network being used has SSID `testnetwork` with password `abcdefgh`.
Note that the captures were made on the same network card that was injecting packets (with hardware encryption disabled). On Linux, **injected packets are shown twice in a network capture**. First it shows the frame as injected by userspace (the test tool will always set the `Has Seqnum` and `Order` in the radiotap header). After the frame was sent, the Linux kernel echoes the actual transmitted frame a second time. This second frame for instance contains the bitrate that was used to send the frame and whether an acknowledgement was received in response. Note that the captures were made on the same network card that was injecting packets (with hardware encryption disabled). On Linux, **injected packets are shown twice in a network capture**. First it shows the frame as injected by userspace (the test tool will always set the `Has Seqnum` and `Order` in the radiotap header). After the frame was sent, the Linux kernel echoes the actual transmitted frame a second time. This second frame for instance contains the bitrate that was used to send the frame and whether an acknowledgement was received in response.