Date: Wed, 4 Apr 2001 17:32:50 +0200 From: =?iso-8859-1?Q?Robert_Blacqui=E8re?= <freebsd@guldan.demon.nl> To: Lars Eggert <larse@ISI.EDU> Cc: freebsd-mobile@freebsd.org Subject: Re: pccard startup scripts Message-ID: <20010404173250.D51040@thorin.guldan.demon.nl> In-Reply-To: <3ACB3BF8.C145CEFE@isi.edu>; from larse@ISI.EDU on Wed, Apr 04, 2001 at 08:21:28AM -0700 References: <20010404140932.A48567@thorin.guldan.demon.nl> <3ACB3BF8.C145CEFE@isi.edu>
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On Wed, Apr 04, 2001 at 08:21:28AM -0700, Lars Eggert wrote:
> Robert Blacquire wrote:
<snip>
>=20
> We have a similar set of scripts, that work a little differently: We have=
a
> hierarchy of subdirectories under /etc/locations, e.g.
>=20
> /etc/locations
> /etc/locations/128.9.160.161
> /etc/locations/128.9.144.145
> /etc/locations/disconnected
>=20
> Those subdirectories contain overrides for files under /etc that will be
> linked in place for that particular location during startup (or a manually
> triggerd "switch-location" event).=20
>=20
> The fun part is how we detect locations: the name of the subdirectories
> under /etc/locations are the IP addresses of well-known hosts (routers, in
> this example) at the respective location. We use the arping tool from por=
ts
> to generate ARP requests out of all interfaces for any of these addresses.
> The first one to succeed gives you which location you're at.
> ("Disconnected" is the fallback if none succeeds.)
>=20
> The benefit of our scheme (in my opinion) is that you can use the same ca=
rd
> at multiple locations. And you don't have to manually specify which
> location you're at.
>=20
> If there's interest, I can clean them up and make them available...
> --=20
> Lars Eggert <larse@isi.edu> Information Sciences Institute
> http://www.isi.edu/larse/ University of Southern California
It is very nice auto discovering the location with use of arpping but
I have been in locations where arp broadcast and arp are more or less
disabled. Also i have wireless card and they need some configuration
before you have access to the network. Like WEP keys.
But it is also very neat setup
Robert
--=20
Microsoft: Where do you want to go today?
Linux: Where do you want to go tomorrow?
FreeBSD: Are you guys coming or what?
OpenBSD: He guys you left some holes out there!
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