Reading PCAP files on Matlab

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Nishu Vidyarthi 2020-2-20

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https://ww2.mathworks.cn/matlabcentral/answers/506625-reading-pcap-files-on-matlab

编辑： Walter Roberson 2022-2-1

采纳的回答： Pujitha Narra

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I am trying to read PCAP files on matlab. Can anyone suggest how to do so?

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Tolga Ulupinar 2022-2-1

Hi James. I have some problems in your scripts. In capture read " error using hex2num Too many input arguments" . Can you help me for this error. How can ı fix this error. I used test_packet.txt

Walter Roberson 2022-2-1

编辑：Walter Roberson 2022-2-1

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@Tolga Ulupinar

I see that @James mentioned that he wrote the code using Octave. The Octave hex2num() supports passing a class as the second parameter, but MATLAB does not.

I think you can change the hex2udp line

udp.(fields{fn})=hex2num(udp.(fields{fn}),'uint16');

udp.(fields{fn}) = uint16(sscanf(udp.(fields{fn}), '%x'));

This would possibly have slightly different behaviour in cases where the input somehow had spaces or non-hex characters instead of the expect hex output; I do not have access to Octave to test its behaviour in detail (and there is the big question of what would be most reasonable to have happen in that circumstance.)

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Pujitha Narra 2020-2-24

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https://ww2.mathworks.cn/matlabcentral/answers/506625-reading-pcap-files-on-matlab#answer_417056

编辑：Pujitha Narra 2020-2-24

Hi,

There is no such feature as of now, but it might be considered for a future release. However, 'pcap2matlab' is one of the several submissions in MATLAB File Exchange on MATLAB Central which is a forum for our product users to interact, exchange information and knowledge, without MathWorks' involvement. Feel free to contact the author of this submission directly for specific questions about the implementation.

Here's the link to the file:

https://www.mathworks.com/matlabcentral/fileexchange/44265-pcap2matlab-importing-network-protocol-analyzer-capabilties-into-matlab?s_tid=answers_rc2-2_p5_MLT