Hi Johannes, Johannes Berg <[EMAIL PROTECTED]> writes: > On Tue, 2006-08-22 at 10:34 -0700, David Kimdon wrote: > > This ioctl is used when radar is delected on a channel. Data > > frames must stop but management frames must be allowed to continue > > for some time to communicate the channel switch to stations. > > Which does lead to the question: How are you detecting radar in > userspace in the first place??
I've been working on merging Devicescape's 802.11h / radar detection implementation into the open source hostapd (and the wireless-dev kernel). Radar is initially detected by the low-level radio driver. Userspace gets notified of radar via calls to ieee80211_radar_status, which generates a "fake" management frame with a struct ieee80211_radar_info in it. Userspace is then responsible for handling the resultant activities, such as stopping transmission on that channel, selecting another channel, sending out channel switch announcements, changing channels, and remembering to block use of the old channel for the required time. I'll reply to your and Jiri's other question separately. Thanks, elliot - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
