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mac80211: Track Beacon signal strength and implement cqm events

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Calculate a running average of the signal strength reported for Beacon
frames and indicate cqm events if the average value moves below or
above the configured threshold value (and filter out repetitive events
with by using the configured hysteresis).

Signed-off-by: Jouni Malinen <j@w1.fi>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Jouni Malinen
2010-03-29 23:28:30 -07:00
committed by John W. Linville
parent 32fbccafed
commit 17e4ec147f
4 changed files with 82 additions and 3 deletions
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9
net/mac80211/cfg.c
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@ -1415,9 +1415,6 @@ static int ieee80211_set_cqm_rssi_config(struct wiphy *wiphy,
struct ieee80211_vif *vif = &sdata->vif;
struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI))
return -EOPNOTSUPP;
if (rssi_thold == bss_conf->cqm_rssi_thold &&
rssi_hyst == bss_conf->cqm_rssi_hyst)
return 0;
@ -1425,6 +1422,12 @@ static int ieee80211_set_cqm_rssi_config(struct wiphy *wiphy,
bss_conf->cqm_rssi_thold = rssi_thold;
bss_conf->cqm_rssi_hyst = rssi_hyst;
if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI)) {
if (sdata->vif.type != NL80211_IFTYPE_STATION)
return -EOPNOTSUPP;
return 0;
}
/* tell the driver upon association, unless already associated */
if (sdata->u.mgd.associated)
ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_CQM);