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Demo: Linux Goes Apple Picking: Cross-Platform Ad hoc Communication with Apple Wireless Direct Link

Stute, Milan ; Kreitschmann, David ; Hollick, Matthias (2020)
Demo: Linux Goes Apple Picking: Cross-Platform Ad hoc Communication with Apple Wireless Direct Link.
24th Annual International Conference on Mobile Computing and Networking (ACM MobiCom 2018). New Delhi India (29.10.-2.11.2018)
doi: 10.25534/tuprints-00013316
Conference or Workshop Item, Secondary publication, Postprint

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Item Type: Conference or Workshop Item
Type of entry: Secondary publication
Title: Demo: Linux Goes Apple Picking: Cross-Platform Ad hoc Communication with Apple Wireless Direct Link
Language: English
Date: 30 November 2020
Place of Publication: Darmstadt
Year of primary publication: 2018
Place of primary publication: New York, NY
Publisher: Association for Computing Machinery
Book Title: MobiCom '18: Proceedings of the 24th Annual International Conference on Mobile Computing and Networking
Event Title: 24th Annual International Conference on Mobile Computing and Networking (ACM MobiCom 2018)
Event Location: New Delhi India
Event Dates: 29.10.-2.11.2018
DOI: 10.25534/tuprints-00013316
Corresponding Links:
Origin: Secondary publication service
Abstract:

Apple Wireless Direct Link (AWDL) is a proprietary and undocumented wireless ad hoc protocol that Apple introduced around 2014 and which is the base for applications such as AirDrop and AirPlay. We have reverse engineered the protocol and explain its frame format and operation in our MobiCom '18 paper "One Billion Apples' Secret Sauce: Recipe of the Apple Wireless Direct Link Ad hoc Protocol." AWDL builds on the IEEE 802.11 standard and implements election, synchronization, and channel hopping mechanisms on top of it. Furthermore, AWDL features an IPv6-based data path which enables direct communication. To validate our own work, we implement a working prototype of AWDL on Linux-based systems. Our implementation is written in C, runs in userspace, and makes use of Linux's Netlink API for interactions with the system's networking stack and the pcap library for frame injection and reception. In our demonstrator, we show how our Linux system synchronizes to an existing AWDL cluster or takes over the master role itself. Furthermore, it can receive data frames from and send them to a MacBook or iPhone via AWDL. We demonstrate the data exchange via ICMPv6 echo request and replies as well as sending and receiving data over a TCP connection.

Status: Postprint
URN: urn:nbn:de:tuda-tuprints-133167
Classification DDC: 000 Generalities, computers, information > 004 Computer science
Divisions: 20 Department of Computer Science > Sichere Mobile Netze
Profile Areas > Cybersecurity (CYSEC)
LOEWE > LOEWE-Schwerpunkte > NiCER – Networked infrastructureless Cooperation for Emergency Response
LOEWE > LOEWE-Zentren > CRISP - Center for Research in Security and Privacy
Date Deposited: 30 Nov 2020 12:28
Last Modified: 20 Oct 2023 09:39
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/13316
PPN: 474394603
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