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Wireshark-dev: Re: [Wireshark-dev] wiretap plugin

From: Jaap Keuter <jaap.keuter@xxxxxxxxx>
Date: Fri, 12 May 2017 08:00:08 +0200
Hi Anders,

What symbol do you add your wiretap plugin path to?
I added mine to CMakeLists.txt, like so:

if(ENABLE_PLUGINS)
	...
	set(PLUGIN_SRC_DIRS
		...
		plugins/unistim
                plugins/usbdump
		...


But that results in this build failure:

Scanning dependencies of target unistim
[ 97%] Building C object plugins/unistim/CMakeFiles/unistim.dir/plugin.c.o
[ 97%] Building C object plugins/unistim/CMakeFiles/unistim.dir/packet-unistim.c.o
[ 97%] Linking C shared module ../../run/plugins/unistim.so
[ 97%] Built target unistim
[ 97%] Generating plugin.c
No protocol registrations found
plugins/usbdump/CMakeFiles/usbdump.dir/build.make:62: recipe for target
'plugins/usbdump/plugin.c' failed
make[2]: *** [plugins/usbdump/plugin.c] Error 1
CMakeFiles/Makefile2:12269: recipe for target
'plugins/usbdump/CMakeFiles/usbdump.dir/all' failed
make[1]: *** [plugins/usbdump/CMakeFiles/usbdump.dir/all] Error 2
Makefile:149: recipe for target 'all' failed
make: *** [all] Error 2


While my plugin code has this registration function:

void wtap_register_usbdump(void)
{
	...
}


Thanks,
Jaap


On 10-05-17 12:03, Jaap Keuter wrote:
> Hi Anders,
> 
> That is good to know. I’ll setup a cmake build as well (on Debian GNU/Linux).
> 
> Thanks,
> Jaap
> 
> 
>> On 10 May 2017, at 10:53, Anders Broman <anders.broman@xxxxxxxxxxxx> wrote:
>>
>> Hi,
>> Plugin.c is generated but with make it does not generate 
>>
>> WS_DLL_PUBLIC_DEF void
>> register_wtap_module(void)
>> {
>>
>> It looks like, it works with cmake...(at least on Wimdows)
>> Regards
>> Anders
>>
>>
>> -----Original Message-----
>> From: Wireshark-dev [mailto:wireshark-dev-bounces@xxxxxxxxxxxxx] On Behalf Of Jaap Keuter
>> Sent: den 9 maj 2017 17:14
>> To: Developer support list for Wireshark <wireshark-dev@xxxxxxxxxxxxx>
>> Subject: Re: [Wireshark-dev] wiretap plugin
>>
>> Hi Anders,
>>
>> Thanks for having a look. This all seems quite in order. 
>> Was this carried over from an older build, ie. is that plugin.c file recent? Does it get regenerated when moved out of the way?
>> I’ll try testing this further tonight.
>>
>> Thanks,
>> Jaap
>>
>>
>>> On 9 May 2017, at 16:46, Anders Broman <anders.broman@xxxxxxxxxxxx> wrote:
>>>
>>> Hi,
>>> In the folder where I have the plugin, plugin.c has the line
>>> * Generated automatically from C:\Development\ewireshark\trunk\tools\make-dissector-reg.py.
>>> It also has
>>> WS_DLL_PUBLIC_DEF void
>>> register_wtap_module(void)
>>> {
>>> :
>>>
>>> I think I have modified the following files:
>>> CMakeListsCustom.txt
>>> plugins/CMakeListsCustom.txt
>>> plugins/Custom.m4
>>> plugins/Custom.make ( 3 places)
>>> packaging/nsis/custom_plugins.txt
>>>
>>>
>>> The Cmake file in the plugin folder has:
>>> register_dissector_files(plugin.c
>>> 	plugin_wtap
>>> 	${DISSECTOR_SRC}
>>> )
>>>
>>>
>>> Regards
>>> Anders
>>>
>>>
>>>
>>> -----Original Message-----
>>> From: Wireshark-dev [mailto:wireshark-dev-bounces@xxxxxxxxxxxxx] On 
>>> Behalf Of Jaap Keuter
>>> Sent: den 9 maj 2017 13:48
>>> To: Developer support list for Wireshark <wireshark-dev@xxxxxxxxxxxxx>
>>> Subject: Re: [Wireshark-dev] wiretap plugin
>>>
>>> Hi Anders,
>>>
>>> Are you sure? I’m concerned about the generation of plugin.c. From 
>>> reading plugins/Makefile.am.inc it seems that it only generates for 
>>> dissector plugins (keyword: plugin), not for wiretap plugins (keyword: 
>>> plugins_wtap)
>>>
>>> #
>>> plugin.c: $(REGISTER_SRC_FILES) $(top_srcdir)/tools/make-dissector-reg.py
>>>       @echo Making plugin.c
>>>       @$(PYTHON) $(top_srcdir)/tools/make-dissector-reg.py $(srcdir) \
>>>               plugin $(REGISTER_SRC_FILES)
>>>
>>>
>>> Thanks,
>>> Jaap
>>>
>>>
>>>
>>>
>>>> On 9 May 2017, at 12:08, Anders Broman <anders.broman@xxxxxxxxxxxx> wrote:
>>>>
>>>> Hi,
>>>> It's in the same files as other custom plugins. Top level 
>>>> CMakeListCustom.txt etc Regards Anders
>>>>
>>>> -----Original Message-----
>>>> From: Wireshark-dev [mailto:wireshark-dev-bounces@xxxxxxxxxxxxx] On 
>>>> Behalf Of Jaap Keuter
>>>> Sent: den 9 maj 2017 11:12
>>>> To: Developer support list for Wireshark 
>>>> <wireshark-dev@xxxxxxxxxxxxx>
>>>> Subject: [Wireshark-dev] wiretap plugin
>>>>
>>>> Hi list,
>>>>
>>>> Does anyone currently have a wiretap plugin setup for building in current master?
>>>> It seems that the plugin Makefile abstractions (plugins/Makefile.am.inc) are geared to dissector plugins, while tools/make-dissector-reg is still capable of making a plugin_wtap as well. And I haven’t even looked at CMake yet. 
>>>> Can anyone share an example collection of current build files for a wiretap plugin?
>>>>
>>>> Thanks,
>>>> Jaap