Jouni Malinen a écrit : > On Tue, 2010-04-27 at 15:08 -0700, Benoit Papillault wrote: > >> +static int ath9k_get_survey(struct ieee80211_hw *hw, int idx, >> + struct survey_info *survey) >> > > >> + struct ieee80211_conf *conf = &hw->conf; >> + >> + if (idx != 0) >> + return -ENOENT; >> + >> + survey->channel = conf->channel; >> > > Are there any plans on providing this information from all channels? I > have assumed that the survey command was supposed to be used for > surveying all channels (e.g., to get information for auto-channel > selection) and returning something for the current channel is quite > limited subset of that. In other words, I would like to be able to run a > scan of all channels and then use NL80211_CMD_GET_SURVEY to fetch > additional per-channel information like noise (and also channel usage > statistics in case of ath9k) from the scanned channels. > > - Jouni > Hi Jouni,
I dig into the source code to understand the use of "idx" and having the value for all scanned channels sounds a good plan. However : - when doing a normal scan (iw dev wlan0 scan), the noise floor calibration is started in a special mode, so I don't know if the results is accurate enought. - the first calibration takes some times .... more than the scan itself. So, you cannot get a valid value before switching to the next channel. Anyway, how idx is supposed to be used? From 0 ... up to the callback returning -ENOENT ? Do we need to keep a table with noise for each channel and return those where we have a value, in which case idx cannot be used as an index into this table ? Regards, Benoit _______________________________________________ ath9k-devel mailing list ath9k-devel@lists.ath9k.org https://lists.ath9k.org/mailman/listinfo/ath9k-devel
