This is our old Q&A Site. Please post any new questions and answers at

I am trying to add a dissector to the new 2.0 build for Windows and need a bit of help as this is my first time using the new cmake structure.

The dissector is a CORBA dissector generated from our IDL using the script for omniorb.

I have put the .c file in epan/dissectors and added it to epan/CMakeListsCustom.txt

I've run cmake and can see it including the custom list.

I then run msbuild /m /p:Configuration=RelWithDebInfo wireshark.sln. This appears to compile my dissector with no errors and the.obj file exists with all the other packet-*.obj files.

But when I run Wireshark my dissector isn't in the list. So what is the step I'm missing to get the dissector linked in.

Thanks for any help

asked 04 Nov '15, 08:05

Andy%20Ling's gravatar image

Andy Ling
accept rate: 0%

The documentation on this is somewhat lacking, all contributions accepted.

If this is really a plugin, then epan\CMakeListsCustom.txt is not the place for this as that's for built in dissectors.

For a plugin, you need to add the plugin directory to the list of plugin directories, I'm not entirely sure how you do this. In the main CMakeLists.txt there is a variable PLUGIN_SRC_DIRS, that is set to all the "standard" plugins and is also has the value CUSTOM_PLUGIN_SRC_DIR appended to it, so I think you need to arrange that that variable contains the source directory of your plugin, probably via a -D CUSTOM_PLUGIN_SRC_DIR=plugins/xxx on the CMake command line. For multiple directories you'll need to experiment.

You'll also need an appropriate CMakeLists.txt in your plugin source directory.

permanent link

answered 04 Nov '15, 08:46

grahamb's gravatar image

grahamb ♦
accept rate: 22%

Thanks for the input.

I have got it working. It looks like the problem was actually a warning I'd ignored on some other plugins I've added that I thought were working. Fixing that warning has made the GIOP disector work.

As to your comments about what is & isn't a plugin, I'm not sure, but what I am doing roughly maps what I was told for version 1 Wireshark.

I have some "real" plugins which dissect their own protocol and these are in plugins/xxx directories. This required creating a CMakeListsCustom.txt in the root directory of Wireshark. There is an example file to show you what to do.

The GIOP plugin/dissector is an "add on" to GIOP. These all seem to live in epan/dissectors and there is a CMakeListsCustom.txt file in epan to let you add new ones. Which is what I have done.

If this isn't the right way, then can someone tell me what is.


(04 Nov '15, 09:11) Andy Ling

Simple rule is if it's in epan\dissectors, then its classed as a built-in dissector, even if it does "plug-in" to giop. After all tcp "plugs-in" to ip.

In the Wireshark world, a plugin lives outside of epan\dissectors, is a separate loadable module (a dll on Windows) and shows up in the plugins tab of the About dialog.

I'd missed the CMakeListCustom.txt.example in the root of the sources, I looked for it in the plugins directory where the additional plugins were listed for nmake builds and a grep for .txt files including CUSTOM_PLUGIN_SRC_DIR obviously missed the example file.

Anyway, your issue is solved, and I'm now a bit wiser.

(04 Nov '15, 09:53) grahamb ♦
Your answer
toggle preview

Follow this question

By Email:

Once you sign in you will be able to subscribe for any updates here



Answers and Comments

Markdown Basics

  • *italic* or _italic_
  • **bold** or __bold__
  • link:[text]( "title")
  • image?![alt text](/path/img.jpg "title")
  • numbered list: 1. Foo 2. Bar
  • to add a line break simply add two spaces to where you would like the new line to be.
  • basic HTML tags are also supported

Question tags:


question asked: 04 Nov '15, 08:05

question was seen: 1,345 times

last updated: 04 Nov '15, 09:53

p​o​w​e​r​e​d by O​S​Q​A