Wireshark-dev: Re: [Wireshark-dev] Problem loading custom DLL with standard Wireshark distribut
Chris Delaney wrote:
Thank you for the response. I tried both of your suggestions, but the
problem remains. The xxx.dll.manifest file was generated during the
build, but copying it to the .../plugins/0.99.5 directory did not
allow the plugin to be loaded. Also, the machine I am trying to run
the WS distribution is the same as where VC is installed, but I
installed vcredist_x86.exe anyway and again, the plugin failed to load.
One thing I did notice was that the .dll's included with the general
distribution require these .dll's:
libwireshark.dll
MSVCRT.dll
KERNEL32.dll
The .dll's that I create with MSVC05EE require these .dll's:
libwireshark.dll
MSVCR80.dll
KERNEL32.dll
That's what I would expect.
I have the C runtime library MSVCRT.dll in my system32 directory, but
I do not have MSVCR80.dll anywhere within my library path, despite
having installed vcredist_x86.exe, and MSVC05EE.
You should find at least one appearance of MSVCR80.dll in one of the
c:\windows\SxS folders, that's where Studio and vcredist_x86.exe will
install it into. The SxS folders are a new MS way to prevent the DLL
hell, but I don't know much more about this feature.
After I copied MSVCR80.dll into my system32 directory, the error
message changed:
From:
Couldn't load module <path>\xxx.dll: The specified module could not be
found.
To:
Couldn't load module <path>\xxx.dll: The specified procedure could not
be found.
So it seems that the MS C Runtime Library is at fault here, but I
still can't seem to nail down the issue. Is there a dependency that
.dll's compiled with MSVC05EE are not compatible with a .exe compiled
with MSVC06?
Yes and no. It should be possible (we use the GTK dlls that are compiled
with MSVC6 with the MSVC2005EE studio builds - so mixing Dlls is
possible), but you have to be very careful about passing C runtime
resources (e.g. FILE handles) between these two, but that's usually not
a problem for a typical dissector. But this will make problems while
running WS, not while loading it (as you have).
I'm unsure what the real problem is here. In an attempt to find the
cause you may try to strip down the plugin content to an absolute
minimum content (e.g. #if 0 out all "functional" parts) and see if this
fixes your problem - in this case a call within your dissector code is
the problem..
The only solution that should work is to use the MSVC2005EE generated
Wireshark instead of the official one.
Regards, ULFL
