Joerg, thank you for your reply.
I fully agree with you. Probably I was not clear in exposing my problem:
wireshark shows me frames not only from adjacent channels, but also from
very far channels, such as channel 60.
My problem is how to tell ipw3945 driver to stop scanning and listen to a
single given channel.
Bye,
Massimo
-----Messaggio originale-----
Da: wireshark-users-bounces@xxxxxxxxxxxxx
[mailto:wireshark-users-bounces@xxxxxxxxxxxxx] Per conto di Joerg Mayer
Inviato: venerdì 26 ottobre 2007 17.47
A: Community support list for Wireshark
Oggetto: Re: [Wireshark-users] R: R: Ipw3945 monitor mode
On Fri, Oct 26, 2007 at 05:36:22PM +0200, Massimo Palmeri wrote:
> This could be ok, but I think that the receiver could lose some frames
> from my channel when scanning for other channels. Anyway I would like
> to record
> (almost) all the frames generated on a given channel. I have to
> discover how to force the ipw driver to stop scanning and listen to a
single channel.
Ah, ok there seems to be some misunderstanding here: It doesn't scan.
But when we talk about channels we are actually talking about the center
frequency of a signal that ranges from 12.5 Mhz below that center frequency
to 12.5 MHz above that center frequency. As each channel only has a width of
5 MHz, that means the wireless signal of each channel covers 5 channels, the
selected one plus the two adjacent upper plus the two adjacent lower
channels. So if you set your channel to 9, then you will see stuff from
channels 7-11.
Hth.
Ciao
Joerg
--
Joerg Mayer <jmayer@xxxxxxxxx>
We are stuck with technology when what we really want is just stuff that
works. Some say that should read Microsoft instead of technology.
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