Wireshark · Wireshark-dev: Re: [Wireshark-dev] [Wireshark] Data bit by bit

[Guy Harris <guy@xxxxxxxxxxxx>]

On Apr 22, 2009, at 12:25 AM, POINTEAU Remy wrote:

> This project should allow Wireshark to dissect packets whose format  
> is defined by an XML file.

I.e., you want a mechanism by which Wireshark can have dissectors that  
aren't implemented as compiled C code.

Therefore...

> For the moment, I parse the XML file, I extract the information and  
> I create the treeview. Now, I need to get the frame and dissect it  
> with my XML.

...you would have a way in which, instead of the dissector handoff  
calling a dissector procedure, it'd call your code, which would use  
the parsed XML to control what to do.  Your code would be handed a  
tvbuff containing the payload for your protocol (not the entire frame,  
just the payload for your protocol).  You should then fetch individual  
values from the protocol, under the control of the parsed XML, using  
the existing tvb_get_ routines, or perhaps just the  
proto_tree_add_item() routine.