Re: How to find out the candidate APs of an associated station?

From: PinkFreud (
Date: 2002-09-13 22:28:49 UTC

On Sat, Sep 14, 2002 at 12:06:56AM +0200, Victor Aleo babbled thus:
> Date: Sat, 14 Sep 2002 00:06:56 +0200
> From: Victor Aleo <>
> X-Mailer: Mozilla 4.79 [en] (Windows NT 5.0; U)
> To:
> Subject: Re: How to find out the candidate APs of an associated station?

> My question now is crystal clear: Why when I try to get the list of APs in
> range from the client side with the command: 'iwlist wlan# ap' or 'iwlist
> wlan# accesspoints" I get:
> "wlan0 Interface doesn't have a list of Access Points"
> I am running Prism2-2002-05-19 with kernel 2.4.18-3 (RH-7.3) and
> wireless-tools 23-2. You have said before that: "Scanning ioctls were added in
> Wireless Extensions v14, so you will need a newer kernel version." I have to
> recognize I am a bit lost :) What exactly do I need to get the list of
> candidate APs from the station?
> 1) New version of your driver (hostap-2002-09-12) or / and,

This is probably recommended in any case.

> 2) New version of the kernel (which one?) or / and,

As stated a bit earlier, a 2.4.20 prerelease kernel, or a patch for the kernel for a newer version of the Wireless Extensions. Patches are available at . It would appear the WE patches need to be applied in order, so, if you're using 2.4.18, you should have WE 13, and will need to get at least the patch for v14, and perhaps even for v15 if you want to try that.

> 3) Wireless Extensions v14 (in this case, how can I get them?, I thought they
> were included with the Wireless Tools, so if I've installed
> wireless-tools-23.2 I should have already installed some version of the
> wireless extensions, isn't it?)

See reply to #2, above.

> Sorry for this long email, but I have not got the whole picture, yet. :)
> And thanks a lot, Jouni, for all your comments!
> --
> Victor


	Mike Edwards

Brainbench certified Master Linux Administrator
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