On Wed, Sep 15, 2010 at 1:31 PM, Jouni Malinen <j@xxxxx> wrote: > On Tue, Sep 14, 2010 at 10:30:04PM -0700, Ben Greear wrote: >> I think for the multi-VIF scenario, it should scan the single associated >> channel by default, but it would be nice to allow full scans on demand. >> (I would very much like to work with standard wpa_supplicant, but if hacking it >> is the only way, then I can attempt that.) > > "Standard wpa_supplicant" needs to become more aware of multiple users > of the same radio, so it is certainly fine to add changes there. For > example, a mechanism for noticing that interfaces are sharing a radio > would be useful. With that, it should also be possible to share the BSS > table and scan results (and requests!) within wpa_supplicant. Depending on how this is implementing, sharing of the physical radio may require some kernel synchronization between the different interfaces using the same radio. It may also be possible to share the same radio between an 802.11 device and a wimax device, for example. Long ago we thought up of a frequency broker [1] but never really wrote it as we have had no usage case for it yet. If we implement the frequency broker we could also technically add a scheduler to sharing the same radio between separate interfaces / technologies, this could just be done in userspace as well, although I am not sure if the timing considerations for doing it in userspace would suffice. [1] http://wireless.kernel.org/en/developers/FrequencyBroker Luis > Sure, mac80211 could potentially do some of merging and reusing, too, > but as far as wpa_supplicant use cases (including hostapd and AP mode in > Wi-Fi P2P like use cases here) are concerned, mac80211 changes may not > be needed for handling the scanning part. > > -- > Jouni Malinen PGP id EFC895FA > -- > To unsubscribe from this list: send the line "unsubscribe linux-wireless" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
