Wireshark-dev: Re: [Wireshark-dev] Disectors & conversations
From: "Cook, Timothy" <[email protected]>
Date: Thu, 22 Jun 2006 11:05:03 -0400
Thanks for the info.

I have yet another question.

Using the routine proto_tree_add_item() to add a signed value to the
Protocol tree displays the value in HEX (as expected) & a decimal value
in parens.  How can I prevent the decimal value from being displayed?

-Tim

 

> -----Original Message-----
> From: [email protected] 
> [mailto:[email protected]] On Behalf Of Jaap Keuter
> Sent: Wednesday, June 21, 2006 1:13 PM
> To: Developer support list for Wireshark
> Subject: Re: [Wireshark-dev] Disectors & conversations
> 
> Hi,
> 
> Technically the TCP ACK only packet isn't part of your 
> protocol, it's an underlying mechanism that transports the 
> data for you. The whole idea of protocol layers is that they 
> are independant, it should be possible to replace TCP with 
> another stream protocol and your application still works.
> Think of UNIX sockets for instance. That is why you shouldn't 
> be concerned with that in relation to your protocol.
> 
> Thanx,
> Jaap
> 
> On Wed, 21 Jun 2006, Cook, Timothy wrote:
> 
> > Isn't it true that myDissector only gets called if the TCP 
> data length 
> > > 0?  Therefore, since a TCP ACK (data length = 0) will not cause 
> > myDissector to be called.
> >
> > I'm new to this whole process!
> >
> > -Tim
> >
> >
> > > -----Original Message-----
> > > From: [email protected]
> > > [mailto:[email protected]] On Behalf Of Jaap 
> > > Keuter
> > > Sent: Wednesday, June 21, 2006 11:59 AM
> > > To: Developer support list for Wireshark
> > > Subject: Re: [Wireshark-dev] Disectors & conversations
> > >
> > > Hi,
> > >
> > > How about
> > >
> > >       if (check_col(pinfo->cinfo, COL_PROTOCOL))
> > >       {
> > >         col_set_str(pinfo->cinfo, COL_PROTOCOL, "myProtocol" );
> > >       }
> > >
> > > Thanx,
> > > Jaap
> > >
> > > On Wed, 21 Jun 2006, Cook, Timothy wrote:
> > >
> > > > We have written a new dissector for Wireshark.  Using the the 
> > > > README.developer (plus other dissector examples) made 
> the creation 
> > > > very simple (thanks for the detailed info).
> > > >
> > > > My dissector hooks TCP port 1000.
> > > >
> > > > How can I hook TCP packets (SYN/FIN/RST/...) and change the
> > > Protocol
> > > > column data to mimic the respective dissector.
> > > >
> > > > I want to be able to filter based on the protocol & get 
> the whole 
> > > > conversation, including the channel open & close.
> > > >
> > > >
> > > > -Tim
> > > >
> > >
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