[state_less]

Opening raw sockets in Linux is a fun way to bang out your own IP, ARP, and ICMP packets for experimenting. I remember the joys of packet spoofing/flooding in college. I think with WiFi you're limited to the AP you're attached to?

It'd be a fun hack to read and inject raw wifi or LTE frames to get a count of radios within range, when they transmit and other details of the low level protocols. It looks like with SDR, folks are able to get better access to the physical layer.

https://www.crowdsupply.com/lime-micro/limesdr-mini/updates/...

[2bitencryption]

Only a few years ago in college (2014?) I lived in a fraternity house and frequently had to track people down for updates on projects.

Turns out Apple devices did (or still do?) expose the DNS hostname with a format like: JAKES-iphone-some-guid

I created a little script to ping the local network for known hosts, return a reverse lookup of the hostnames, parse the name from the iPhone hostname, and update their status in little list of who was in the building, in case I needed them for something.