Ethereal-users: Re: [Ethereal-users] How to get the Signal Strength(802.11) using ethereal??

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From: Guy Harris <gharris@xxxxxxxxx>
Date: Wed, 24 Mar 2004 20:21:50 -0800
On Wed, Mar 24, 2004 at 01:16:30AM -0800, MohanaSundaram wrote:
> I had heard that the ethereal is capable of retrieving
> the signal strength from the 802.11 Packets.

It can *if* the driver supports it, and if the version of libpcap you're
using supports the link-layer type for the radio header.

> I am using Cisco Aironet Client Adapter in my linux box to
> capture the 802.11 packets.  I am able to capture the
> packet.. But I don not see the "Radio Header" or some
> signal specific parameters.  How can I capture the
> radio header using ethereal??

By using a card whose driver supports a radio header.  I don't know
whether the Cisco driver on Linux does (but I wouldn't be surprised to
hear that it doesn't); I think recent versions of the Prism II and
Atheros (madwifi) drivers do.