On Fri, 2017-08-18 at 20:16 +0300, Luca Coelho wrote: > Hi Dariusz, > > On Fri, 2017-08-18 at 14:48 +0200, Dariusz Gadomski wrote: > > Hi, > > > > There is a “Wi-Fi Direct Client Policy” setting in some Cisco AP hardware > > [1]. > > I am unaware how that works exactly behind the scenes (except for some > > hints at > > [2]), but I have noticed that with that setting set to “Deny” I am observing > > issues when trying to connect from a machine with an Intel 8260 on a 4.10.0 > > kernel - all connection attempts lead to failure. > > > > I have managed to obtain some captured packets from that attempt as well as > > from a successful attempt (a machine with Broadcom bcm43224). What I have > > noticed is that AP puts the P2P IE in the beacon frames and when 8260 sends > > a > > probe request it also puts a P2P IE element in it. No response from the AP > > is > > ever transmitted. > > > > In case of the Broadcom-based device the probe request does not contain P2P > > IE > > and it is able to correct normally. My understanding of this issue is that > > the > > AP makes the decision to temporarily blacklist the client after receiving a > > P2P > > IE from it. > > > > I have made an additional test by commenting out the P2P interface types > > from > > iwlwifi/mvn/mac80211.c - using such kernel allowed the 8260 device to > > connect > > successfully. > > > > I’m wondering if there’s a way of changing this behavior to enable the 8260 > > to > > connect to a network ‘secured’ in this way? I would also appreciate some > > information about which behavior is correct (bcm43224 vs 8260) and is it > > specified anywhere in the Wi-Fi P2P specs (or anywhere else ftm)? > > I have heard about this before. The issue is that the Cisco AP doesn't > allow the 8260 to connect because it has the P2P IE in it. But AFAICT > it is not against any specs to include this IE. The Cisco AP is using > the IE as an indication that we are trying to connect as a P2P device, > which in this case we are not. > > I'll try to dig the thread I had about this and take it again with our > system engineers to hear what they have to say about it. > > In the meantime, I think it would be helpful if you could contact Cisco > about this issue as well.
Also, as a workaround if you are really not interested in using P2P is to start wpa_supplicant with “p2p_disabled=1” in the configuration. This should prevent the P2P IE from being sent. -- Cheers, Luca.
