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Re: Running tshark on large pcap files
From: Erik Hjelmvik <erik.hjelmvik () gmail com>
Date: Thu, 13 Jun 2013 22:19:33 +0200

2013/6/12 Rayne <hjazz6 () ymail com>:
Is there a way to turn off TCP reassembly in tshark? I'm running tshark on
multiple files using a script on a Linux server, so I can't use SplitCap.

Being the guy who develops SplitCap I can assure you that it runs on
Linux -- just make sure to install the mono framework.
Here's a quick howto for Ubuntu:

sudo apt-get install libmono2.0-cil mono-runtime
wget http://sourceforge.net/projects/splitcap/files/latest
unzip SplitCap_1-9.zip
mono SplitCap.exe -r dumfile.pcap

There is a minor bug when running in Linux though, as the split files
aren't properly put into a subdirectory. But I'll make sure to have
that fixed for the next release of SplitCap.

Feel free to let me know if you have any additional questions
regarding SplitCap!

/erik


And it also doesn't seem like I can split up the files with editcap.
Whenever I tried to do that with the large pcap files, I got empty output
files (24 bytes) instead. I'm not sure if it was due to the large file size.

As for replying to old threads, I'm sorry about that. I didn't know I was
doing that, because I was posting only from emails. I thought I just needed
to send to wireshark-users () wireshark org (using my old posts so I could
reference the email address) and a new thread would be created. I'll be sure
not to do that again the next time I post a new thread. Sorry!

________________________________
From: Christopher Maynard <Christopher.Maynard () gtech com>
To: wireshark-users () wireshark org
Sent: Tuesday, June 11, 2013 12:30 PM

Subject: Re: [Wireshark-users] Running tshark on large pcap files

Anders Broman <a.broman ()    > writes:

   Possible workarounds:
   - Use editcap to split the files to more manageable chunks of say 1
   - 2 GiB.
   - turn off TCP reassembly and all protocols you see above TCP/UDP
   I don't know if the MPLS dissector has any memory consuming features
   tunable by preferences. Your best bet i s probably editcap, you can
   splice the resulting files back together with mergecap should you
   need it.

Another possibility is splitcap: http://www.netresec.com/?page=SplitCap.
- Chris

P.S. This entire thread is buried on page 3 of the gmane archives under the
30 May 2013 12:09 thread entitled, "Editcap 1.2.15 not working", which
itself is incorrectly threaded under the 30 Jan 2013 11:11 thread entitled,
"Understanding SMB flow in Wireshark", all of which were started by Rayne.
Please start a new message/thread instead of replying to old threads and
changing the subject line.


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