Sun Nov 9 20:22:44 PST 2008
On Fri, 2008-11-07 at 09:42 +0530, Kiran Kulkarni wrote:
> Dan Williams wrote:
> > On Thu, 2008-11-06 at 20:41 +0530, Kiran Kulkarni wrote:
> >> In wpa_supplicant I am searching for a functionality where I will put my
> >> system in passive scan which will only listen to beacons. And if
> >> networks are available I should get some notification on D-Bus or Socket
> >> interface.
> > On Linux, wpa_supplicant will only request probe-scans when you have
> > "scan_ssid=1" in a network block. Otherwise, it's up to the driver
> > whether passive or active scans are used.
> > You'll get a notification on the D-Bus interface when new scan results
> > are available, not sure about the socket interface.
> > Dan
> But I found out that in wext we can set /scan_type/ field to
> /IW_SCAN_TYPE_PASSIVE/ in /struct iw_scan_req/ and then make ioctl call
> /SIOCSIWSCAN. /But I didnt know any method exposed to do such thing.
> I agree that we get signal over D-BUS when scan results are available.
> My question was that can we force the driver to go into passive scanning
> through wpa_supplicant or we have to write seperate code to handle this
You could modify wpa_supplicant to pass TYPE_PASSIVE if you like, but be
aware that only a few drivers actually support that selector.
More information about the Hostap