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How to read pcap files directly using matlab

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I have to extract statistical features like source port, destination port, packet length, total length and round trip time from .pcap files by using Matlab. I tried some widespread ways I found on the Internet (pcap2matlab, traceplay) but I didn't make them work. Is there anyone who has a new suggestion? I will really appreciate your help.

Accepted Answer

Samatha Aleti
Samatha Aleti on 8 May 2020
Hi Aslihan,
There is no such feature as of now, but it will be considered for a future release. Also, 'pcap2matlab' is one of the 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.

More Answers (1)

michael on 20 Jun 2020
To make the pcap2matlab litlle bit simple to use:
capture = pcap2matlab(filter, decodeas_and_dissector, filename_or_interface, capture_stop_criteria)
Lets say you are using a udp protocol and the data you would like to read is on top of it: data[0:1] (in packet showed below is 0x5d 0x2d)
Therfore in order to read a file you shall use:
  • filter=[]; %there is no specific filter
  • decodeas_and_dissector.somedata=base+0:base+1; (where base is the location of the 1st byte of the data (0x2a=42))
  • capture_stop_criteria=[];
Now, lets assume that your data is dissected, like udp.srcport,
Therfore in order to read a file you may use:
  • decodeas_and_dissector = {'udp.srcport'}
other option is like before
  • decodeas_and_dissector.srcport = 34:35 %locations (0x22:0x23)
Walter Roberson
Walter Roberson on 29 Nov 2022
You need to install WireShark . The pcap2matlab() code invokes an executable named tshark from the wireshark installation.
Marek HICAR on 22 Dec 2022
Thanks Walter, I do have WireShark installed before launching the pcap2matlab file.
The file was recordered. Are the input arguments correct? See attached fig.

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