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How do I get Wireshark to describe can-bus errors

asked 2024-08-13 04:48:34 +0000

Dll6 gravatar image

updated 2024-08-13 04:50:10 +0000

I can see the can stream but there is no error details. Do I need another filter

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Is there another filter needed?

Dll6 gravatar imageDll6 ( 2024-08-13 04:49:29 +0000 )edit

It's possible that there are no errors in your capture, or maybe error packets are dropped by your capture device.

grahamb gravatar imagegrahamb ( 2024-08-13 08:50:39 +0000 )edit
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answered 2024-08-13 21:20:23 +0000

Guy Harris gravatar image

A "filter" just filters out packets from the display; it doesn't add information, it just hides packets that don't match the filter, so you can see which packets do match the filter.

If by "can-bus errors" you mean CAN error frames, the filter you want is can.flags.err == 1; that will limit the display to error frames.

If by "can-bus errors" you mean lower-level errors, those aren't saved in most capture file formats.

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Thank you for the response. After more reading on the subject it sounds like what I want to do is dbc decode the CAN stream. I have a dbc file for the device and will look into importing it into wireshark

Dll6 gravatar imageDll6 ( 2024-08-13 21:28:32 +0000 )edit
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Asked: 2024-08-13 04:48:34 +0000

Seen: 70 times

Last updated: Aug 13