Re: [PATCH] mac80211: improve IBSS scanning

[Benoit Papillault <benoit.papillault@free.fr>]

Le 03/05/2010 16:13, Johannes Berg a écrit :
> On Mon, 2010-05-03 at 14:08 +0000, Joerg Pommnitz wrote:
>> Johannes Berg<johannes@...>  writes:
>>>
>>> Interesting. I guess we never rejected it although it's invalid
>>> according to the standard. Yuck. I think I would like to make nl80211
>>> reject it, but maybe I'll forget about it and let you use it ;)
>>
>> Sorry, I don't know about mac80211. This was more a general point.
>> I thought this woudn't work at all but a co-worker was adamant that
>> it works fine with Madwifi. So I sat down and observed it with
>> a monitoring interface and lo and behold: The beacons really contained
>> the broadcast SSID.
>
> Oh ok. I didn't see anything in cfg80211 but will check and post a
> patch :)
>
> johannes

Sorry to reply late, but in IBSS, beacons are really critical for 
synchronization (including BSSID & TSF). As such, they cannot be removed.

AFAIK, adhoc DEMO is just like adhoc, but without beacons. As such, 
there is no synchronization and every node use the BSSID 
00:00:00:00:00:00, preventing from having several "networks" on the same 
frequency (since there is no SSID to distinguish them).

What you said is that you are using the broadcast SSID instead? And a 
fixed BSSID? I would indeed appreciate the capture file :-)

Regards,
Benoit