Hi Dustin:

Theoretically, should a PRISM2 card work nicely with either pebble or
monowall?

IOW, if I plug a PrismII card in to a machine (say, a Soekris running
either pebble or m0n0wall), can I put the card into HostAP mode and
access this data even through the basic operating system?

Thanks!

Rob



-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Dustin
Goodwin
Sent: Tuesday, September 14, 2004 11:24 PM
To: [EMAIL PROTECTED]
Subject: Re: [nycwireless] "Client Stumbling?"

Rob,
Many APs include the ability display a list of associated nodes. Often 
this will include the ability to show the current signal strength of the

node. Now the hard part is translating signal strength to distance. For 
instance the Linux Hostap drivers provide data about rx signal strength 
for each client in the /proc/net/hostap/wlan0 directory. Each client has

an associated file in this directory named the same as the MAC address 
of the client. This file contains stats for the node. Example from my
AP:
pebble:/proc/net/hostap/wlan0# grep "signal" *
00:02:8a:a3:25:83:last_rx: silence=160 signal=214 rate=110
00:04:23:53:19:36:last_rx: silence=160 signal=168 rate=10
00:0f:66:0f:a3:ce:last_rx: silence=161 signal=195 rate=110
00:30:65:09:ed:84:last_rx: silence=160 signal=185 rate=110

Cisco Aironet access points have the "show dot11 assoc" command which 
can show receive signal strength for each associated node.

- Dustin -

Rob Kelley wrote:

>I'm wondering about showing users who connect to my wifi network the
>strength of their connection. Sure, I could just give them a link to
>NetStumbler and tell them to download the client, but I'm wondering.
>
>Do wireless clients send out a signal that an access point can stumble
>on and theoretically measure?   
>
>Is there a tool out there for accessing that information?  The idea is
a
>reverse signal-to-noise graph ("your client is this far from the
node").
>
>Thanks,
>
>Rob
>
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