Wireshark · Wireshark-dev: Re: [Wireshark-dev] CAN over Ethernet

[Kumquat KromKiller <kromkillerkumquat@xxxxxxxxx>]

I choose how CAN messages will be transported, that is why I said I can add whatever layers I want between Ethernet and CAN.

Right now, it's just plain encapsulation of CAN over Ethernet with a custom EtherType greater than 0x0600.

Ideally, I would like to avoid making my own dissector. It would be great if captured traffic could be dissected with Wireshark out-of-the-box, even if I have to add several unnecessary layers between Ethernet and CAN.

For example, SLL has a non-standard EtherType value for CAN messages but it cannot be encapsulated with Ethernet (there's no standard EtherType value for SLL)

 

Maybe there's a combination of CANopen, SLL, EtherCAT, SocketCAN or whatever that can achieve this ?

On Sat, Nov 7, 2015 at 1:57 PM, Roland Knall <rknall@xxxxxxxxx> wrote:

Hi

It depends how the CAN messages are being transported within Ethernet. Then you could write a dissector for the method, which in turn calls the CAN dissector.

The same thing happens with a lot of other dissectors,the openSAFETY disssector for instance.

regards,

Roland

On Sat, Nov 7, 2015 at 1:33 PM, Kumquat KromKiller <kromkillerkumquat@xxxxxxxxx> wrote:

Hi everyone,

I need to transport CAN messages over Ethernet and I would like to be able to dissect them in Wireshark for debugging purposes.

Considering the fact that I can add whatever layers I want between Ethernet and CAN, what would be the most efficient way to achieve this ?

Thanks.