Re: Template for external dissector plugin

[Reinhold Kainhofer <lists () kainhofer com>]

On 20/12/2011 16:36, Jaap Keuter wrote:
> Just for my information, is this the crux of your location independance?
>
> find_package(Wireshark)
> include_directories (${WIRESHARK_INCLUDE_DIRS})
Yes, the cmake/FindWireshark.cmake file (which is executed with the
find_package) locates the libwireshark.so library and the wireshark
headers (e.g. /usr/include/wireshark).

> and does this the mean you need to have the Wireshark development tree
> available anyway?
No, you don't need the full wireshark development tree available. You
just need the headers and the .so library. In Ubuntu these development
files are provided by the libwireshark-dev package. Of course, if you
compiled the development version of wireshark yourself, the plugin
template will locate those development files (provided that the
libwireshark.so and the headers are in a "sane" position, i.e. a
standard location or a location given in the appropriate environment
variables).

The only reason why all tutorials tell you to develop your plugin in the
wireshark source tree is that it's easy to find the headers and link to
the library (because everything is already set up in the make files). If
you can locate the libwireshark.so library of your wireshark version and
the installed wireshark headers by some other way (I use the cmake
script, you might just as well write an autoconf snippet), there's
nothing that stops you from developing out of the wireshark source tree.
However, if you have wireshark installed from packages and compiled your
own version, then the wrong library might be found and linked to. In
that case, your plugin will not work and might even crash wireshark at
startup.

And my CMakeList.txt file makes sure the plugin is installed in
~/.wireshark/plugins/, which is a directory where wireshark will look
for plugins. If you want to install it globally, you'll need to copy the
.so file of your plugin to e.g. /usr/lib/wireshark/libwireshark1/plugins/ .

Cheers,
Reinhold

-- 
------------------------------------------------------------------
Reinhold Kainhofer, reinhold () kainhofer com, http://reinhold.kainhofer.com/
 * Financial & Actuarial Math., Vienna Univ. of Technology, Austria
 * http://www.fam.tuwien.ac.at/, DVR: 0005886
 * LilyPond, Music typesetting, http://www.lilypond.org

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