Track mac addresses, if possible

[nhoening]

This would be better, as IP addresses can refer to differetn computers over time.

For this, the aileen-lan calling code needs to be on the same local are network and we need to use sudo.

[nhoening]

https://serverfault.com/questions/148113/can-i-use-nmap-to-discover-ips-and-mac-addresses

Hints and also a nice command using awk. Apparently, root privileges are needed so that nmap gets the mac address:

sudo nmap -sP 172.31.201.0/24 | awk '/Nmap scan report for/{printf $5;}/MAC Address:/{print " => "$3;}' 

I tested it locally and it works. But only with sudo, so that is the technical bottleneck.

Nice that it also stores the hostname, which we can put in the observations dictionary (where now we store source: "nmap").

This would also make parsing the nmap result easier, as we let awk do this.

[nhoening]

Issue #2 (using python-nmap) would not make the sudo issue go away, see here.