proxAWDL

Tunnels a regular TCP connection (e.g., iperf) through an AWDL link by exploiting the NetService API. Workaround because Apple prevents regular sockets from listening or connecting to awdl0. As an alternative, there is a special XNU socket option SO_RECV_ANYIF to allow sending/receiving via AWDL:

#define SO_RECV_ANYIF 0x1104 /* unrestricted inbound processing */

Usage

Frist compile with Xcode.

Then, on the server, run

./proxawdl

and start the TCP server listening on localhost, e.g., iperf -s -p 22222.

On the client, run

./proxawdl client

and start the TCP client connecting to localhost, e.g., iperf -c -p 22222.

Limitations

• hardcoded TCP ports

• does not multiplex TCP connections which means that applications using multiple TCP connections will probably not function properly

Our Papers

• Milan Stute, David Kreitschmann, and Matthias Hollick. One Billion Apples’ Secret Sauce: Recipe for the Apple Wireless Direct Link Ad hoc Protocol. In The 24th Annual International Conference on Mobile Computing and Networking (MobiCom ’18), October–November 2018, New Delhi, India. DOI.

Contact

• Milan Stute (email, web)

Credits

• CocoaAsyncSocket to handle local TCP connections (as static dependency)