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by varenc 205 days ago
Just `tcpdump -i awdl0` while Airdrop-ing to a Mac to observe it's still using AWDL. (unless the interface named awdl0 is actually using WiFi Aware...)

Another fun thing to do: `ping6 ff02::1%awdl0`. Pings all nearby Apple devices with AWDL active. Including things like your neighbor's phone that's not even on your local network. (but addresses rotate I believe so can't track persistently)
1 comments
darkwater 205 days ago
> (but addresses rotate I believe so can't track persistently)

But maybe you can infer presence tracking the response time? Could be exploited anyway, no?

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varenc 204 days ago
yes! I've had the same thought. If you have only one neighbor in range, seems like you could definitely infer their presence and approximate range based on latency. Phones don't keep AWDL active all the time, but every time you swipe control center it perks up I think.

Could also detect when someone is hosting a party or something.

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