Re: [RFC] CANOpen dissector

[Stephen Fisher <steve () stephen-fisher com>]

On Fri, Dec 02, 2011 at 04:21:15PM +0100, Yegor Yefremov wrote:

> I'm writing a CANOpen dissector 
> (http://en.wikipedia.org/wiki/CANopen). The dissector itself is almost 
> ready. The main problem I have is, how do I hook this dissector on to 
> SocketCan one? CAN has no ports, so I can't decide on this basis. My 
> suggestion were to create a drop-down list in SocketCan dissector to 
> select high-level CAN protocol (like CANOpen, DeviceNet etc.). What do 
> you think about this?

Does the SocketCan protocol have any indication which protocol is next 
(CANOpen, DeviceNet, etc)?  If so, you can use the call_dissector() to 
pass a tvbuff to the next dissector (from SocketCan to CANOpen for 
example).  You would "break off" the rest of the packet that SocketCan 
is dissecting with something like tvb_new_subset() which creates a new 
tvbuff out of a backing tvbuff based on certain offset and length.
___________________________________________________________________________
Sent via:    Wireshark-dev mailing list <wireshark-dev () wireshark org>
Archives:    http://www.wireshark.org/lists/wireshark-dev
Unsubscribe: https://wireshark.org/mailman/options/wireshark-dev
             mailto:wireshark-dev-request () wireshark org?subject=unsubscribe