iPhones have been exposing your unique MAC despite Apple’s promises otherwise — “From the get-go, this feature was useless,” researcher says of feature put into iOS 14::“From the get-go, this feature was useless,” researcher says of feature put into iOS 14.
It’s not specified what precisely is provided in the payload of the multicast body. I suspect that the original MAC address is included in something like a Bonjour broadcast, but I wasn’t able to find any documentation that confirms that.