> -----Original Message----- > From: Ben Greear [mailto:greearb@xxxxxxxxxxxxxxx] > Sent: Sunday, June 04, 2017 17:33 > To: Otcheretianski, Andrei <andrei.otcheretianski@xxxxxxxxx>; > hostap@xxxxxxxxxxxxxxxxxxx > Subject: Re: wpa-supplicant and scan sharing > > > > On 06/04/2017 01:34 AM, Otcheretianski, Andrei wrote: > >> -----Original Message----- > >> From: Hostap [mailto:hostap-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of > >> Ben Greear > >> Sent: Wednesday, May 31, 2017 00:45 > >> To: hostap@xxxxxxxxxxxxxxxxxxx > >> Subject: wpa-supplicant and scan sharing > >> > >> [Sorry for previous email with bogus subject.] > >> > >> Hello, > >> > >> In wpa_supplicant/events.c, there is code similar to this below. > >> > >> Is there any reason 'ret = 1' other than some drivers may have issues > >> with multiple association attempts? I am pretty sure that I used to > >> bring up many ath9k and ath10k station vdevs at once, so maybe this > >> is just for Intel NICs (based on the comitter that changed that code last)? > > > > This is the same behavior as it was there before this patch. Previously if scan > results triggered an operation, other interfaces wouldn't be updated at all. > > The patch you mention changed it to update scan results on other interfaces, > but still prevents starting any operation. > > Anyway, in the "if" you mention wpa_s->scan_res_handler != NULL - so > > it's not an association flow - the association is happening in > > wpas_select_network_from_last_scan() > > I'm not sure what do you mean by "multiple association attempts" - concurrent > connections on the same radio are serialized using radio_works anyway, and on > different radios there is no scan results update from sibling. > > So, here is the flow when you connect multiple interfaces: the first one will > trigger scan and connect + update the siblings. Other sibling interfaces will > connect directly without scant through wpa_supplicant_fast_associate(). > > In my case, until I relaxed this, all station vdevs would scan before connecting. > Possibly this is due to other patches I have in my supplicant...but I would be > curious to see 'iw events' output if you could get multiple station vdevs to > associate w/out each of them scanning. Tried it with hwsim and it works for me - second connection is without scan Something like this: def test_wpas_multi_sta_connect(dev, apdev): """wpa_supplicant connect 2 STA interfaces""" hapd = hostapd.add_ap(apdev[0], { "ssid": "open" }) ifname = "test-" + dev[0].ifname dev[0].interface_add(ifname, create=True) dev[0].connect("open", key_mgmt="NONE", scan_freq="2412") hwsim_utils.test_connectivity(dev[0], hapd) wpas = WpaSupplicant(ifname=ifname) wpas.connect("open", key_mgmt="NONE", scan_freq="2412") hwsim_utils.test_connectivity(wpas, hapd) hwsim_utils.test_connectivity(dev[0], hapd) dev[0].global_request("INTERFACE_REMOVE " + ifname) hwsim_utils.test_connectivity(dev[0], hapd) Andrei > > Thanks, > Ben > > -- > Ben Greear <greearb@xxxxxxxxxxxxxxx> > Candela Technologies Inc http://www.candelatech.com _______________________________________________ Hostap mailing list Hostap@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/hostap
