On Sat, 2009-05-16 at 14:48 +0200, Johannes Berg wrote: > On Fri, 2009-05-15 at 19:15 -0400, Dan Williams wrote: > > > Well, what does "background scan" mean? mac80211 will obviously accept > > beacons from APs on the same channel and happily add them to the scan > > list. > > Only if powersave/beacon filtering isn't enabled. Actually, mac80211 > does beacon filtering itself now, so I don't think this happens any more > (I did that on purpose so people don't really rely on the former > behaviour) > > > But a background scan would imply that the card itself is taking > > over the decision about when to jump around and scan, basically the same > > thing NM is doing, right? When would the card/stack decided to > > background scan, and what channels would it background scan on? If it > > doesn't do more or less all passive channels, then it wouldn't be that > > useful for figuring out the site survey data. > > I would think that mac80211, while asked to scan when associated, could > simply do something like calculating how long it can go off-channel > under the current QoS requirements, and then go off-channel for that, > wait for the next on-channel beacon and some traffic, scan the next > channel(s) again etc. Yeah, that sounds like it would work. Dan -- 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
