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Why is OBD2 not a subdissector of 15765

asked 2020-11-22 00:35:51 +0000

Why is OBD2 not a subdissector of 15765?

The standard seems to say it rides on top of 15765 in the case of CAN. I do recognize that it also says it can ride on some other Physical layers but Wireshark doesn't support those. Officially riding on top of the 15765 dissector would also solve my second gripe that the current OBD2 dissector requires 8 bytes in the frame to dissect, which I can't find spec support for. If this or that ECU requires 8 bytes, that's a whole other issue compared to what's allowable in the spec.

But I'm also fairly junior in the industry so, correct me where I'm wrong.

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answered 2020-11-22 11:57:32 +0000

Jaap gravatar image

Perhaps you can reach out to the latest authors adding to these dissectors (see here and here) and find out what was the reasoning behind it.

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Asked: 2020-11-22 00:35:51 +0000

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Last updated: yesterday