Wireshark-users: Re: [Wireshark-users] Problems with dumpcap and ringbuffer
From: Jeff Morriss <jeff.morriss@xxxxxxxxxxx>
Date: Sat, 25 Nov 2006 09:46:24 +0800

This was one of the most-often reported bugs in 0.99.0:

http://bugs.ethereal.com/bugzilla/show_bug.cgi?id=895

Lars Ruoff wrote:
Additional info:
It is dumpcap from Ethereal 0.99.0
I told the customer to try again with dumpcap/Wireshark 0.99.4.
But then i think this part hasn't much evolved?
Lars


Lars Ruoff wrote:
Hi,
one of my customers in using dumpcap (on Windows) like this:

 > dumpcap -i X -w data/dump.pcap -b filesize:10000 -b files:100

(where X is the index of the right capture interface.)
This should turn on a max of 100 files * 10000KB = 1GB of maximum used
disk space.

He notes that:
<quote>
We have started the tests as indicated.  Initially the filesize was
increasing in a proper manner, i.e. I checked at intervals and it was for example, 1MB, 4MB, 6MB etc...

However after some time, I checked the filesize again, and found a number of files with a size of approximately 100 bytes each (1KB size on disk), which I'm attaching for your comments.
</quote>

Actually, these files contain a *single* (entire) packet!

Anybody knowing what's going on here?
Is this a known bug and can something be done about it?

thanks,
Lars


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