1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 <2021> 2022 2023 2024 | Index | 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 <2021> 2022 2023 2024 |
<== Date ==> | <== Thread ==> |
---|
Subject: | 回复: How to capture messages generated by PyEpics? |
From: | "Li, Ji via Tech-talk" <tech-talk at aps.anl.gov> |
To: | Mark Rivers <rivers at cars.uchicago.edu> |
Cc: | "tech-talk at aps.anl.gov" <tech-talk at aps.anl.gov> |
Date: | Fri, 19 Feb 2021 02:26:30 +0000 |
Thanks Mark. I expect Wireshark to be install & play. The one I used is an old installation on an old server. Will find another one and try it out.
Best,
-Ji Li
发件人: Mark Rivers <rivers at cars.uchicago.edu>
发送时间: 2021年2月18日 20:11 收件人: Li, Ji <liji at bnl.gov> 抄送: tech-talk at aps.anl.gov <tech-talk at aps.anl.gov> 主题: RE: How to capture messages generated by PyEpics? Ø When I get/set from PyEpics (tried both PV module and CA module), the program was able to successfully get the up-to-date value of the PV and set new value to it, Ø > but no messages showed up. Doesn't PyEpics communicate using CA protocol messages? Are there specific filter/configuration to be done in Wireshark to show these messages?
There is no difference in the CA network messages using caget and PyEpics. They both use the same libca.so library from EPICS base.
You must have something configured wrong in Wireshark or something.
Mark
From: Tech-talk <tech-talk-bounces at aps.anl.gov>
On Behalf Of Li, Ji via Tech-talk
Hi,
I'm trying to capture CA messages targeting a specific PV on the IOC server with Wireshark (v1.12.1) and Michael Davidsaver's cashark plugin (ca.pv or ip.addr as the filter). Wireshark was able to capture messages generated by caget/caput commands ran from bash. When I get/set from PyEpics (tried both PV module and CA module), the program was able to successfully get the up-to-date value of the PV and set new value to it, but no messages showed up. Doesn't PyEpics communicate using CA protocol messages? Are there specific filter/configuration to be done in Wireshark to show these messages? Thanks.
-Ji Li
|