From: Konrad Meyer <konrad@...>
Date: 2007-11-01T03:26:12+09:00
Subject: Re: Find out the mac address

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Quoth Stephen Kyle:
> On 31/10/2007, K. R. <mcse@palstek.ch> wrote:
> > Hi @all
> >
> > How can I find out the mac address from the default gateway with a ruby
> > script?
> > Does exist any methods to read it out? The script runs on a linux
> > distribution...
> I don't know if any methods, exist, but you could hack it up if you
> have the 'ip' package installed on your system, ie. 'ip show route'
> doesn't say the command wasn't found.
> Then you can try:
>=20
> # get your gateway IP address
> gateway =3D `ip route
> show`.match(/default.*/)[0].match(/\d\d?\d?\.\d\d?\d?\.\d\d?\d?\.\d\d?\d?=
/)
[0]
or .match(/((?:\d{1,3}\.){3}(?:\d{1,3}))/)
(group (3 groups of 1-3 decimals followed by a period) with (a group of 1-3=
=20
decimals))
> # get the mac address for the gateway
> mac_address =3D `ip neigh
> show`.match(/#{gateway}.*/)[0].match(/..:..:..:..:..:../)[0]
this could also be more correct:
/((?:[\da-f]{2}:){5})(?:[\da-f]{2}))/
So it doesn't match *any character*, but instead valid MAC addresses.
>=20
> Steve (abuser of match)
>=20
> >
> > thanks for your comment!

Regards,
=2D-=20
Konrad Meyer <konrad@tylerc.org> http://konrad.sobertillnoon.com/

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