Wireshark · Wireshark-dev: [Wireshark-dev] Lua embedded into C++

[Kunal Thakrar <kunalthakrar@xxxxxxxxxxxxx>]

Hello all,

I am currently trying to embed Wireshark's Lua into my C++ GUI that I have made in order to customise Wireshark. 

So far I have gone about adding the following to my existing GUI code.

TCPAnalyser_dialog.cpp

extern "C"

{

#include "lua.h"

#include "lauxlib.h"

#include "lualib.h"

#include "epan\wslua\register_wslua.h"

}

//.... other includes for GUI Code here

//... Other GUI code here

void TCPAnalyserTreeWidget::Analyse(){

//More of my own code

       lua_State *state = luaL_newstate();

luaL_openlibs(state);

    

   //this function below is giving errors

       wslua_register_classes(state);

QMessageBox msgBox;

// run the Lua script

QString f;

int lua1;

const char* filename = "alert.lua";

//load file

lua1 = luaL_loadfile(state, filename);

if (lua1 != LUA_OK){

f = "Loadfilefail";

}

        //debug code

msgBox.setText(f);

msgBox.exec();

int lua;

lua = luaL_dofile(state, filename);

if (lua !=LUA_OK){

f = "dofilefailed";

const char* message = lua_tostring(state, -1);

f = message;

lua_pop(state, 1);

}

    

       //debug code

msgBox.setText(f);

msgBox.exec();

}

>From here I have gone and edited the Perl script which writes the file register_wslua.c (which from what I understand adds Wireshark functions and classes to the Lua state) as this would be rewritten during each build of the wslua project

make-reg.pl

print C '#include "register_wslua.h"' . "\n\n";

#print C '#include "wslua.h"' . "\n\n";

#print C '#include "lua_bitop.h"' . "\n\n";

other than the two prints being commented out and the addition of my include in place of config.h it is left unchanged

The header File I created is as follows:

register_wslua.h

#include "config.h"

#include "epan\wslua\wslua.h"

#include "epan\wslua\lua_bitop.h"

#ifndef _register_wslua_h

#define _register_wslua_h

static void wslua_reg_module(lua_State* L, const char *name _U_, lua_CFunction func);

void wslua_register_classes(lua_State* L);

void wslua_register_functions(lua_State* L);

#endif

From what I understand this should be working, however, I am getting the following errors:

Error 1 error LNK2019: unresolved external symbol _wslua_register_classes referenced in function "private: void __thiscall TCPAnalyserTreeWidget::Analyse(void)" (?Analyse@TCPAnalyserTreeWidget@@AAEXXZ) C:\Users\Kunal\Work\FinalProject\Development\wsbuild32_1\qtui.lib(TCPAnalyser_dialog.obj) wireshark

Error 2 error LNK1120: 1 unresolved externals C:\Users\Kunal\Work\FinalProject\Development\wsbuild32_1\run\RelWithDebInfo\Wireshark.exe 1 1 wireshark

I can't for the life of me figure out why these errors are occurring and I was wondering if there was something I was missing. I have done a clean and a build again just to make sure it was this which was causing the issue. I am getting the same errors if instead of doing all of this, I just include the epan\wslua\declare_wslua.h instead which points to the same functions.

Any help would be most appreciated!

Thanks in advance,

Kind Regards,

Kunal Thakrar