Wireshark mailing list archives
ESL dissector problem or BUG
From: Andrea Merello <andrea.merello () gmail com>
Date: Tue, 15 Mar 2011 10:48:10 +0100
Hello! I'm using Wireshark 1.4.4 on Linux OS (64 bits) compiled from sources. The capture in general is working but I have a problem with the ESL (Ethercat Swith Link) dissector, so I would like to report this, as I suppose it might be a Wireshark bug. My test setup is made in this way: I have an hardware device that TXes one ethernet packet every 150us (very precisely) and another hardware device that receives those packets and appends to them the ethercat swith link performing hardware timestamping. The output of last device is connected to the PC NIC from wich wireshark captures packets. The last device comes with a .dll for older windows version of wireshark, that overrides the origial wireshark ethercat.dll. With this DLL and wireshark 1.2 all is OK. Packets are received by wireshark and their timestamp are correctly extracted by the ESL. However with the Linux version I told above (that is supposed to work as well as it seems to support ESL natively), things do not work properly and sometimes there are "jumps" in the timestamps. I produced graphs to check packet jitter with both version of wireshark and this can be clearly seen. The hardware device that appends timestamp is a Beckhoff ET2000 network probe. Furthermore I have another issue with the Linux wireshark 1.4.4 timestamps: Selecting from the "View" menu the option "Time Display format" and then "seconds since previous captured packet" or "seconds from previous displayed packet" seems not to work and timestamps are still shown as relative to the beginning of capture. Thank you Andrea ___________________________________________________________________________ Sent via: Wireshark-users mailing list <wireshark-users () wireshark org> Archives: http://www.wireshark.org/lists/wireshark-users Unsubscribe: https://wireshark.org/mailman/options/wireshark-users mailto:wireshark-users-request () wireshark org?subject=unsubscribe
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- ESL dissector problem or BUG Andrea Merello (Mar 15)