/*
* Handle station leaving bss.
*/
void
ieee80211_node_saveq_cleanup(struct ieee80211_node *ni)
{
struct ieee80211vap *vap = ni->ni_vap;
/* vap is already deleted */
if (vap == NULL) return;
if (vap->iv_opmode == IEEE80211_M_HOSTAP) {
ieee80211_mlme_node_leave(ni);
}
else {
ieee80211node_clear_flag(ni, IEEE80211_NODE_PWR_MGT);
#if NOT_YET
if (ieee80211node_has_flag(ni, IEEE80211_NODE_UAPSD_TRIG)) {
ieee80211node_clear_flag(ni, IEEE80211_NODE_UAPSD_TRIG);
IEEE80211_UAPSD_LOCK(ni->ni_ic);
ni->ni_ic->ic_uapsdmaxtriggers--;
IEEE80211_UAPSD_UNLOCK(ni->ni_ic);
}
#endif
}
if ((ieee80211_node_saveq_drain(ni) != 0) && (vap->iv_set_tim != NULL))
vap->iv_set_tim(ni, 0);
IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni,
"%s %u sta's in ps mode \n", __func__,vap->iv_ps_sta);
}
static bool
ieee80211_pwrsave_smps_check(ieee80211_pwrsave_smps_t smps)
{
u_int16_t i, throughput = 0, rssi;
struct ieee80211vap *vap = smps->ips_vap;
struct ieee80211com *ic = vap->iv_ic;
if (!smps->ips_connected ||
!ieee80211_vap_ready_is_set(vap) ||
(vap->iv_opmode != IEEE80211_M_STA) ||
(!ieee80211node_has_flag(vap->iv_bss, IEEE80211_NODE_HT))) {
return FALSE;
}
/* SM power save check.
* SM Power save is enabled if,
* - There is no data traffic or
* - Throughput is less than threshold and RSSI is greater than threshold.
*/
throughput = vap->iv_txrxbytes / (IEEE80211_PWRSAVE_TIMER_INTERVAL * 125); // in Mbps
rssi = ic->ic_node_getrssi(vap->iv_bss, -1, IEEE80211_RSSI_BEACON);
vap->iv_txrxbytes = 0; // Clear byte counter
smps->ips_smpsDataHistory[smps->ips_smpsCurrDataIndex++] = throughput;
smps->ips_smpsCurrDataIndex = smps->ips_smpsCurrDataIndex % IEEE80211_SMPS_DATAHIST_NUM;
/* We calculate average throughput over the past samples */
throughput = 0;
for (i = 0; i < IEEE80211_SMPS_DATAHIST_NUM; i++) {
throughput += smps->ips_smpsDataHistory[i];
}
throughput /= IEEE80211_SMPS_DATAHIST_NUM;
/*
* We make the thresholds slightly different for SM power save enable & disable to get
* over the ping-pong effect when calculated throughput is close to the threshold value.
* SMPS Enable Threshold = Registry Value
* SMPS Disable Threshold = Registry Value + IEEE80211_SMPS_THRESH_DIFF
*/
if (!throughput || ((throughput < vap->iv_smps_datathresh) &&
(rssi > vap->iv_smps_rssithresh))) {
/* Receive criteria met, do SM power save. */
ieee80211_pwrsave_smps_event(smps, IEEE80211_SMPS_ENABLE);
} else if ((throughput > (vap->iv_smps_datathresh + IEEE80211_SMPS_THRESH_DIFF)) ||
(rssi < vap->iv_smps_rssithresh)) {
ieee80211_pwrsave_smps_event(smps, IEEE80211_SMPS_DISABLE);
}
return TRUE;
}
