Whomst

Quick and dirty Sinatra app for SNMP polling an Apple Airport Express base station to see who's online. YMMV

Requirements

• smnpwalk
• nmap for MAC prefix database
• dig for Zeroconf
• ping to test for host online

Instructions

1. Make a file called hosts with MAC address or host in the left hand field, then a space and a free-form comment

DE:AD:BE:EF:12:34 Raspberry Pi 1
10.10.42.2 Raspberry Pi 1
DE:AD:BE:EF:12:34 Power Mac G4
DE:AD:BE:EF:12:34	Thinkpad

2. bundle install
3. Run ruby app.rb IPADDRESS_OF_AIRPORT and navigate to http://localhost:4567/

host	ip address	mac address	vendor	comment	zeroconf
raspberry pi 1	10.10.32.3	DE:AD:BE:EF:12:34	alfa	wireless	raspberrypi.local.
	10.10.32.6	DE:AD:BE:EF:12:34	raspberry	ethernet
melvin's macbook	10.10.32.8	DE:AD:BE:EF:12:34	apple		melvin.local. "model=macbookpro3,3" "osxvers=7"
Mac Mini	10.10.32.9	DE:AD:BE:EF:12:34	liteon
Pentium PC!	10.10.32.10	DE:AD:BE:EF:12:34	intel	wireless	windowsxp.local.
	10.10.32.103	DE:AD:BE:EF:12:34	wistron	ethernet
jon iphone	10.10.32.100	DE:AD:BE:EF:12:34	apple
tom iphone	10.10.32.101	DE:AD:BE:EF:12:34	apple
tom imac	10.10.32.102	DE:AD:BE:EF:12:34	apple		tom-imac.local.

Why Ruby?

This should probably be run by cron instead of running in the server. Those slow dig calls could be parallelized with a better language.

TODO

• Historical info (lastlog)
• Machines stick around for a long time (DHCP lifetime?)
• non-DHCP hosts?