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tshark 3.4.4: Fixing flag "-o flag "wpan.802154_cc24xx:TRUE" specifies unknown preference"

asked 2021-09-16 17:50:04 +0000

le_top gravatar image

I upgraded a raspberry pi system from buster to bullseye and that bumped the system from 2.X to 3.4.4.

Apparently the flag wpan.802154_cc24xx changed as I get the error:

tshark 3.4.4: Fixing flag "-o flag "wpan.802154_cc24xx:TRUE" specifies unknown preference"

So I am looking for the alternative. (I'll probably self answer this).

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answered 2021-09-16 21:12:21 +0000

le_top gravatar image

updated 2021-09-16 21:16:00 +0000

Wireshark's code shows:

prefs_register_obsolete_preference(ieee802154_module, "802154_cc24xx");

'git blame' helps us find the origin of this change .


if (ieee802154_fcs_type == IEEE802154_FCS_OK_BIT) {
    options |= DISSECT_IEEE802154_OPTION_CC24xx;

Leading to the flags:


which I leave at its default value, and,


to set as

-o "wpan.fcs_format:TI CC24xx metadata"
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answered 2021-09-16 20:54:17 +0000

Chuckc gravatar image

Changed here: Add support for IEEE 802.15.4 32-bit FCS

Looks at the preferences for IEEE 802.15.4 FCS format

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Thanks for this link, I've been preparing and validating my own answer. Not so easy to lead up to the right CLI option to add to tshark, but once I had the right flag, it was not that hard to find.

le_top gravatar imagele_top ( 2021-09-16 21:20:00 +0000 )edit

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Asked: 2021-09-16 17:50:04 +0000

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Last updated: Sep 16