HostAP Digest, Vol 67, Issue 7

Kiran Kulkarni kiran.1267 at gmail.com
Fri Nov 7 01:03:29 EST 2008


Raghavendra wrote:
> Hi Kiran,
>
> While connecting to AP, it is definitely possible to connect to Hidden 
> AP using ap_scan=2. In this case wpa does active scanning and gets 
> associated.
>
> If we use ap_scan=1, then it does passive scanning and gets associated.
>
> What I wrote is only performing scanning operation, where in if you 
> want to scan for perticular AP(ssid) and get the scanned result ssid 
> is not possible with wpa_supplicant. For that you should use hidden AP 
> ioctl command provided by your chip vendor.
>
> Ask your driver team, they will tell you ioctl to be used for hidden 
> AP scan (only scan).
>
> -Raghu.
>
>
>
> ----- Original Message ----- From: "Kiran Kulkarni" 
> <kiran.1267 at gmail.com>
> To: "Raghavendra" <s.raghu at samsung.com>
> Cc: <hostap at lists.shmoo.com>
> Sent: Friday, November 07, 2008 10:33 AM
> Subject: Re: HostAP Digest, Vol 67, Issue 7
>
>
>> Raghavendra wrote:
>>> > Message: 3
>>> > Date: Thu, 06 Nov 2008 20:41:19 +0530
>>> > From: Kiran Kulkarni <kiran.1267 at gmail.com
>>> <mailto:kiran.1267 at gmail.com>>
>>> > Subject: Passive Scannning
>>> > To: hostap at lists.shmoo.com <mailto:hostap at lists.shmoo.com>, hostap
>>> <hostap at shmoo.com <mailto:hostap at shmoo.com>>
>>> > Message-ID: <49130917.2090409 at gmail.com
>>> <mailto:49130917.2090409 at gmail.com>>
>>> > Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>>> >
>>> > 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.
>>> > So such fascility is provided or not
>>>  Hi,
>>>  By default passive scanning is supported in wpa_supplicant. Where 
>>> in it listens on all the channels for beacon frames.
>>>  Active scanning is not supported (Not sure), where in it will send 
>>> probe request to AP ssid.
>>>  -Raghu
>>>
>>> >
>>> >
>>> > ------------------------------
>>> >
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>>> > HostAP at lists.shmoo.com <mailto:HostAP at lists.shmoo.com>
>>> > http://lists.shmoo.com/mailman/listinfo/hostap
>>> >
>>> >
>>> > End of HostAP Digest, Vol 67, Issue 7
>>> > *************************************
>> Raghu I think wpa_supplicant uses AP_SCAN 1 for active scanning and 
>> fetch the result from the driver.... see the /wpa_driver_wext_scan/ 
>> function u will get the answer that we dont use Passive scanning we 
>> use active scanning 
>
>
When u keep ap_scan 1 it use Active scan... Jouni am I right???


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