On Mar 03, Jouni Malinen wrote: > On Mon, Dec 20, 2021 at 04:48:24PM +0100, Lorenzo Bianconi wrote: > > Introduce radar_background parameter to configuration file > > in order to enable/disable background radar/CAC detection. > > What's the use case for this new parameter and the configuration having > to explicitly enable this functionality? Is there a reason for not doing > this in cases where the driver supports this capability? It looks like > patches 1..8 were enabling this functionality automatically and it is > only this final patch that makes it depend on a configuration parameter > (which is default by default). I added this parameter just to add the capability to disable radar_background even if the hw supports it (e.g. for testing/debugging). > > > diff --git a/hostapd/hostapd.conf b/hostapd/hostapd.conf > > @@ -143,6 +143,13 @@ ssid=test > > +# Enable radar/CAC detection through a dedicated background chain available on > > +# some hw. The chain can't be used to transmits or receives frames. > > +# This feature allows to avoid CAC downtime switching on a different channel > > +# during CAC detection on the selected radar channel. > > +# (default: 0 = disabled, 1 = enabled) > > +#radar_background=0 > > How would someone writing hostapd configuration know when to enable > this? Or maybe more importantly, when one should not enable this? Would > use of that dedicated background chain result in some other capabilities > getting reduced? nope, the radar_chain is completely independent from the "data" ones. > > This is also a bit unclear on what happens if the driver does not > support this capability and radar_background=1 is explicitly set in the > configuration. it will not be enabled since we always check WPA_DRIVER_RADAR_BACKGROUND capability. Since it is not mandatory, I will drop this patch in the series and always enable RADAR_BACKGROUND if supported by the hw. Regards, Lorenzo > > -- > Jouni Malinen PGP id EFC895FA >
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