I have written/developed 4 distinct plugins that I have been using since Wireshark 2.x. When Wireshark 3.x was released, I updated my plugins to work with that. Now that Wireshark 4.x is out, I am trying to update my plugins for that version.
I develop in Windows environment and I follow the instructions in the Developer's guide in the Windows section. I download all of the tools that are necessary and set up my Wireshark build environment and build Wireshark along with my four plugins. Then I install the latest cooresponding Wireshark version (in this case version 4.0.3) and then copy my plugin dlls and all of my supporting dlls to the Wireshark install location. This has been working for me for the last several years.
This time, when I finished building Wireshark and my four plugins, I am able to successfully run my data with the Wireshark version I built and with my new plugins. I have a test case I run through to make sure it all works correctly. And it does. Then I installed Wireshark 4.0.3 and copied all of my plugins and supporting dlls to the Wireshark 4.0.3 install location. At this point, when I run this version of Wireshark, I get an error stating that "Couldn't load plugin 'foo.dll':" followed by the location of my plugin dll, and finally, "The specified procedure could not be found." The other three plugins I wrote work as designed.
More background about the plugin that does not load: It is actually based on the SMTP dissector that comes with Wireshark. I start with the SMTP dissector code and modify it to work with my data. I changed the names of the important methods and variables to have new names and I register these methods to be used instead of the original SMTP dissector. Again, this has worked for all of the 2.x and 3.x versions of Wireshark and it works with the new Wireshark that I built with the lasest source from Wireshark.
Can someone tell me how to figure out which "specified procedure" is not being found and how I can fix this issue? Again, it works just fine with the Wireshark that I built. But we don't distribute our own Wireshark. We only distribute our plugin dlls and let our users install the latest version from Wireshark.
