> -----Ursprüngliche Nachricht----- > Von: Jouni Malinen <j@xxxxx> > Gesendet: Dienstag, 7. März 2023 19:51 > An: Sebastian Priebe <sebastian.priebe@xxxxxxxxxxx> > Cc: hostap@xxxxxxxxxxxxxxxxxxx > Betreff: Re: [PATCH] wpasupplicant: Only advertise MSCS and SCS in > association request if supported by bss > > On Fri, Mar 03, 2023 at 08:43:39AM +0000, Sebastian Priebe wrote: > > Since version 2.10 the extended capabilities MSCS and SCS are > > advertised in the association request. > > This causes the assiciation request to be rejected by several access > > points. Issue was observed with: > > - D-Link DIR600 > > - Tp-Link AC1900 > > - Synology MR2200ac > > To avoid this issue the extended capabilites MSCS and SCS shall only > > be added if the bss also supports them. > > Would you happen to know what is the exact trigger for the listed APs > failed to reject the association, i.e., is this because of the length of > the Extended Capabilities element being "unexpectedly" long or is there > something specific about these two particular capability bits or is this > just because of included the Extended Capabilities element in the first > place, regardless of its length? > I tested this with the Synology MR2200ac: it seem that this AP can't handle the Extended Capabilities element in the association request at all. I tried different lengths/contents and it got rejected every time. The status code was always 1. > > Note: The extended capabilites are only included in the association > > request if the bss also sent it's extended capabilities (see > > wpas_populate_assoc_ies). This workaround exists since verion 2.1. > > --- > > This is strictly speaking non-compliant with the IEEE 802.11 standard, > but I guess this would be an acceptable compromise to avoid > interoperability issues with deployed APs. > I completely agree. > Please see the top level CONTRIBUTIONS file for the description of the > Signed-off-by: line. I'd need to get this patch resubmitted with that > added to be able to consider applying it. I will do that. Thanks. > > -- > Jouni Malinen PGP id EFC895FA _______________________________________________ Hostap mailing list Hostap@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/hostap
