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We have written a LUA postdissector that calculates a number of response time values. These are defined as floating point fields, e.g.

rte_art_F = ProtoField.float("","APDU Rsp Time")

The postdissector works fine but I can't get the Wireshark IO Graph facility to plot the values - I just get a flat line. I use the Y Axis Unit: Advanced option in IO Graph, choose Calc: MAX(*) and then add as the value to plot.

I've tried the same thing with Wireshark compiled dissector fields and these work fine.

Does IO Graph support LUA postdissector fields? Am I doing something wrong?

Thanks and regards...Paul

PS: The dissector can be downloaded from

asked 02 Aug '14, 03:48

PaulOfford's gravatar image

accept rate: 11%

Is this a candidate for a bug report?

(04 Aug '14, 15:34) PaulOfford

What is your

  • OS and OS version
  • Wireshark version
(04 Aug '14, 23:19) Kurt Knochner ♦

Windows 7 Ultimate Build 7601 SP 1 - Wireshark 1.10.8

I've upgraded to Wireshark 1.12.0 and I get the same problem.

Just to be sure I'm doing this right, here's what I put in the dialog box:

alt text

(05 Aug '14, 05:10) PaulOfford
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question asked: 02 Aug '14, 03:48

question was seen: 2,268 times

last updated: 05 Aug '14, 05:35

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