How Do You Handle Debugging Wireshark Lua Dissector?

 

PC running slow?

1. Download ASR Pro from the website

2. Install it on your computer

3. Run the scan to find any malware or virus that might be lurking in your system

Improve the speed of your computer today by downloading this software - it will fix your PC problems.

If you have Wireshark Lua Dissector Debug on your system, we hope this guide can help you fix the problem.

 

 

In this article, we’ll first look at simple debugging of Lua dissectors. We will then extend the dissector to the display.it deals with opcodes, not just your current numbers.

Debug

When I talk about debugging, don’t I mean an easy way to debug using a representative debugger?to view the code. You won’t do anything here. Rather, I think about the most important process of finding and fixing bugs inCoded. There are usually three ways to debug Lua dissectors.

The first one to really check if you get a voicemail error when running the script. This happens either at startupWireshark when reloading the script with Ctrl + Shift + L. This will detect syntax errors in the Will script.This is the idea behind the error when the end is probably missing an instruction:

Runtime errors often show up in the dissector subtree. For position when calling a function with its own errorThe name is incorrect, so the slogan of the error looks like this.

Finally, Wireshark has integrated each Lu consolea on which to display error messages. Found for “Lua” toolsMenu. Wireshark has a special print () function with which you can log. So the following code:

in the console will look like this:

Versions of Wireshark prior to 3.0 use various functions for transport. These: critical ("message") , warning ("message") , information ("message") message ("message") and debug ("message") . Print them allto the console, and the difference is the perceived seriousness. The following code:

will look like a safe when outputting to the console:

You can link to the debug library by requesting the file to run

then start calling its functions. For example:

And that’s pretty much all the debugging features available. However, don’t expect a high-quality IDE with a built-in debugger.Trade in Lua dissectors. If you want the owners to launch ZeroBrane Studio,but I didn’t figure out how to do it that easily, so I have to debug printf myself.

MongoDB Protocol Analyzer Extension

As you can see, we created the dissector in the previous post because it looked like this in the package details area:

The opcode here is basically just a number. It would be better if we also display the name of the opcode. In accordance withMongoDB wired protocol, opcodes have the following names:

le_int () gets a finite integer from the buffer. Miscellaneous opcode now contains a representative inComplete decimal opcode. We can then create a single function that returns the opcode name, which provides the opcode number:

Finally, we need to replace the old secondary bridge with the following add code:

We have named the opcode name in parentheses relative to the original statement so that nothing but the opcode number is displayed.The package details section used by Wireshark will then look for:

The entire message header is now parsed. Next partHow can specific messages be deciphered.

  print ("buffer length:" .. length) 

  critical ("buffer length:".. length)warn ("buffer length: in .. length)message ("buffer length:" .. length)info ("buffer length: inches .. length)debug ("buffer length:" .. length) 

  local k = require ('debug') 

  local opcode = buffer (12,4): le_int () 

  function get_opcode_name (opcode)  local opcode_name = "Unknown"      if opcode == 1 then opcode_name = "OP_REPLY"  elseif opcode == 2001 then opcode_name is "OP_UPDATE"  elseif opcode == 2002 next opcode_name = "OP_INSERT"  elseif opcode == 2002 then opcode_name = "RESERVED"  elseif opcode == 2004 then opcode_name is "OP_QUERY"  elseif opcode 2005 == while opcode_name = "OP_GET_MORE"  elseif opcode == 2004 then opcode_name = "OP_DELETE"  elseif opcode == 2007 then opcode_name = "OP_KILL_CURSORS"  elseif opcode == 2010 then opcode_name is "OP_COMMAND"  elseif opcode == 2011 now opcode_name = "OP_COMMANDREPLY" end  return opcode_nameend 

  opcode_name local = get_opcode_name (opcode)subtree: add_le (opcode, buffer (12,4)): append_text ("(" .. opcode_name .. ")") 

  mongodb_protocol = Proto ("MongoDB", protocol ")Message_length "mongodb = ProtoField.int32 (" mongodb.message_length "," messageLength ", base.DEC)request_id ProtoField = .int32 ("mongodb.requestid" - "requestID" - base.DEC)response_to = ProtoField.int32 ("mongodb.responseto": "responseTo", base.DEC)opcode is the same as in ProtoField.int32 ("mongodb.opcode", "opCode", base.DEC)mongodb_protocol.fields matches y message_length, response_to, request_id, opcodeMongodb_protocol.dissector function (buffer, tree) pinfo, length = buffer: len ()  if length == 0, then we will reach the end  pinfo.cols.protocol = mongodb_protocol.name  Subtree next to tree: add (mongodb_protocol, buffer (), "MongoDB Protocol Data")  Subtree: add_le (message length, buffer (0,4))  Subtree: add_le (request_id, buffer (4,4))  Subtree: add_le (response_to, buffer (8,4))  local opcode = buffer (12,4): le_uint ()  Main street opcode_name = get_opcode_name (opcode)  subtree: add_le (opcode, buffer (12,4)): append_text ("(" .. opcode_name .. ")")endGet_opcode_name (opcode) function  local opcode_name = "Unknown"      if == opcode 1 then opcode_name means "OP_REPLY"  elseif == opcode 2001 just opcode_name = "OP_UPDATE"  elseif == opcode 2009 then opcode_name = "OP_INSERT"  elseif == opcode 2003 then opcode_name = "RESERVED"  elseif == opcode 2004 then opcode_name is "OP_QUERY"  elseif == opcode 2005 immediately after opcode_name = "OP_GET_MORE"  elseif == opcode June 2006 then opcode_name = "OP_DELETE"  elseif == opcode 2007 then opcode_name is "OP_KILL_CURSORS"  elseif == opcode 2010 then opcode_name = "OP_COMMAND"  elseif == opcode 2009 then opcode_name = "OP_COMMANDREPLY" end  Remove opcode_nameendlocal tcp_port = DissectorTable.get ("tcp.port")tcp_port: add (59274, mongodb_protocol) 

 

 

Improve the speed of your computer today by downloading this software - it will fix your PC problems.

 

 

 

Come Organizzi Il Debug Del Dissettore Wireshark Lua?
Как вы справляетесь с отладкой диссектора Wireshark Lua?
¿Cómo Se Maneja La Depuración Del Disector Wireshark Lua?
Hur Tar Du över Felsökningen Av Wireshark Lua-dissektorn?
Comment Travaillez-vous Sur Le Débogage Du Dissecteur Wireshark Lua ?
Hoe Ging Het Met Het Debuggen Van Wireshark Lua Dissector?
Como Você Considera A Depuração Do Dissector Wireshark Lua?
Wie Gehen Sie Und Ihre Familie Mit Dem Debuggen Des Wireshark-Lua-Dissektors Um?
Wireshark Lua Dissector 디버깅을 어떻게 처리합니까?
Jak Radzisz Sobie Z Debugowaniem Dysektora Wireshark Lua?