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Using BLE nRF Sniffer Plugin in Tshark

asked 2023-11-22 22:20:54 +0000

Anviori gravatar image


Is it possible to use the filtering options provided by the nRF52840 BLE sniffing firmware for Wireshark, in Tshark? Specifically, the device address filtering.

Thank you

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Are you asking if you can use the nRF Sniffer for Bluetooth LE fields in a display filter?

The device addresses seem to be part of Bluetooth Low Energy Link Layer.

(Sample capture attached to 12637: Add dissector for Nordic BLE traces)

Chuckc gravatar imageChuckc ( 2023-11-23 03:26:26 +0000 )edit

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answered 2023-11-23 13:15:55 +0000

Stig gravatar image

It's not possible to use the nRF BLE Sniffer with tshark, but you can use the command line variant to start the capture with a specific device address. Have a look at the nrfutil ble-sniffer, which is an improved rewrite of the sniffer.

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The BLE sniffer can be used with Tshark. See: I can capture advertising using the display filters: btle.advertising_address or btcommon.eir_ad.entry.device_name but whatever happens after a connection is established won't get captured even when I specify the "or btle.slave_bd_addr" filter (same as the adv address).

I'm trying to set this all up in an RPi btw. The nrfutil tool doesn't seem to have a version compiled for the aarch64 architecture. I tried using the tool on a Mac as well, but don't see how to use it as a sniffer.

Anviori gravatar imageAnviori ( 2023-11-24 00:50:39 +0000 )edit

Seems like no matter what I do, I can only capture the packets after connection establishment using the nordic ble sniffer plugin in Wireshark. Tshark is able to detect the plugin:, so weird that it can't use it.

Anviori gravatar imageAnviori ( 2023-11-24 00:56:02 +0000 )edit

Actually, figured out how to use the utility on Mac to sniff the desired BLE packets. I also managed to compile an older version of the utility for the RPi, but it doesn't support BLE sniffing. Nordic stopped making the newer version that support it open source :/

Anviori gravatar imageAnviori ( 2023-11-24 05:01:42 +0000 )edit

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Asked: 2023-11-22 22:20:54 +0000

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Last updated: Nov 23 '23