hostap passive scanning.

Andrea G. Forte andreaf
Fri Feb 11 13:09:41 PST 2005

Actually that is a good idea. I will see if I can use passive scanning in
Master mode.
I want to monitor the APs and the channels without interfering.
 If I do it in Master mode,
other STAs will try to associate with me. Is there a way to prevent this?
Is there a way to use passive scanning in monitor mode?

Thank you,

On Thu, 10 Feb 2005, Jouni Malinen wrote:

> On Thu, Feb 10, 2005 at 11:08:22AM -0500, Andrea G Forte wrote:
> > In manual mode "host_roaming  2" we have "more" control on the scanning
> > process.
> > In particular (as you know), in the driver there are two commands for
> > forcing the firmware to start the probing part of the scanning
> > (_RID_HOSTSCAN) and for forcing the Auth./Ass. part of the scanning
> > (_RID_JOINREQUEST). However, the first one is for active scanning only
> > (i.e. probes are sent to force APs to answer).
> > Does the ap_scan functionality send probes on each channel (in which
> > case it is active scanning)? Or does it use passive scanning (listens
> > for beacons and records the results)?
> It does not send Probe Requests.
> I'm still somewhat unclear on why you would like to use passive scanning
> in this way. It takes much more time to scan passively. If you really
> want to do it and don't care about the gaps in connectivity, you could
> as well just move to Master mode and do the scanning there. For
> Managed mode, it would probably be better to use firmware to take care
> of the passive scanning.
> --
> Jouni Malinen                                            PGP id EFC895FA
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