Lua error: dissect_tcp_pdus dissect_func: ... v2g.lua:166: attempt to index a nil value

[skrtre]

Build standalone plugin for Linux (Ubuntu 22.04, Wireshark 4.0.3). No errors or warnings during build process but when analyzing V2GTP packets the Lua error. Any ideas how to fix?

[Gomox11]

@skrtre I run into the exact same issue with "main" and the "0.6.0" tag. Makes the plugin impossible to use for me. Did you find any solution yourself? Or does another developer have any advice?

[malsyned]

This is an error that I get when Wireshark can find v2g.lua but can't find v2gexi.so. Where did you copy each of those files to?

[jhart-cpi]

The Lua script has been integrated into the package now. I've found that if you have the Lua script in local plugins that Wireshark scans for, it can conflict with the integrated package version if you have previously installed the Lua plugin manually.

[Gomox11]

So here is what I did from a "clean" state (no wireshark installed, no plugins installed, Ubuntu 20.04 LTS).

Standalone

Following the README for a standalone plugin installation:

• sudo add-apt-repository ppa:wireshark-dev/stable -y
• sudo apt-get install tshark wireshark wireshark-dev
• git clone https://github.com/ChargePoint/wireshark-v2g.git
• mkdir wireshark-v2g/build && cd wireshark-v2g/build
• cmake ..
• make
• sudo make install

... which ends in:

Install the project...
-- Install configuration: "Debug"
-- Installing: /usr/local/lib/wireshark/plugins/4.0/epan/v2gexi.so
-- Set runtime path of "/usr/local/lib/wireshark/plugins/4.0/epan/v2gexi.so" to ""
-- Installing: /usr/local/lib/wireshark/plugins/4.0/../v2g.lua

But if I then try to run wireshark, it says:

wireshark          
wireshark: symbol lookup error: wireshark: undefined symbol: wslua_plugins_get_descriptions

[chardin-cpi]

This should be fixed now - loaded a Wireshark with a standalone and got the plugin registered with the symbols