getting factory MAC address

[clutton]

Hi list. I'm relatively new here. So, Hi. :)

I don't know how to read the real MAC, I mean the one which is burned in
ROM. Is it possible from the user space? I've ported GNU macchanger and
it's the last non ported feature.

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=187363

In Linux it can be done like this:
https://github.com/alobbs/macchanger/blob/master/src/netinfo.c#L118