A wireshark plugin must declare what major and minor version it
was built with as these are checked when wireshark loads plugins.
On the top of that, we use major + minor + micro to adapt to
changed API between releases. So far, we were getting these
version numbers from wireshark/config.h.
And while most distributions install wireshark/config.h file some
don't. On distros shipping it it's hack^Wsaved during built by
packaging system and installed later. But some distros are not
doing that. At least not for new enough wireshark because as of
wireshark's commit v2.9.0~1273 the ws_version.h is installed
which contains the version macros we need and is installed by
wireshark itself.
But of course, some distros which have new enough wireshark
packaged do not ship ws_version.h and stick to the hack. That is
why we can't simply bump the minimal version and switch to the
new header file. We need a configure check and adopt our code to
deal with both ways. At least for the time being.
Based on Andrea's original patch:
https://www.redhat.com/archives/libvir-list/2020-September/msg00156.html
Closes: https://gitlab.com/libvirt/libvirt/-/issues/74
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Martin Kletzander <mkletzan@redhat.com>
Reviewed-by: Andrea Bolognani <abologna@redhat.com>
The wireshark-2.4.0 is almost 2 years old now. Assuming anybody
interested in running latest libvirt doesn't run old wireshark,
it is safe to do this. It also simplifies the code.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
As advertised in previous commits, wireshark has changed the way
that plugins register. In fact, it has done so two times since
the last time we've touched our code (wireshark v2.5.0 and
v2.9.0). Use the wireshark script from respective releases to
generate newer registration callbacks and put them into our code.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
In order to be able to dissect libvirt protocol the wireshark
plugin needs to be registered. So far this plugin registration
code was generated on every build using a script that was copied
over from wireshark's tools/ directory.
This is suboptimal, because the way that plugins register changes
across wireshark releases. Therefore, let's keep the generated
file in the git, put the command line used to generate the file
into a comment and remove the script.
This solution allows us to put different registration mechanism
into one file (under #ifdef-s) and thus compile with wider range
of wireshark releases.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
