diff options
Diffstat (limited to 'net/mac80211/mlme.c')
| -rw-r--r-- | net/mac80211/mlme.c | 74 |
1 files changed, 44 insertions, 30 deletions
diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c index d79b9cd72fc5..a5dba67bbe0b 100644 --- a/net/mac80211/mlme.c +++ b/net/mac80211/mlme.c @@ -1445,7 +1445,7 @@ static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, ieee80211_led_assoc(local, 1); - if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD) { + if (sdata->u.mgd.assoc_data->have_beacon) { /* * If the AP is buggy we may get here with no DTIM period * known, so assume it's 1 which is the only safe assumption @@ -1453,6 +1453,7 @@ static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, * probably just won't work at all. */ bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1; + bss_info_changed |= BSS_CHANGED_DTIM_PERIOD; } else { bss_conf->dtim_period = 0; } @@ -2548,13 +2549,14 @@ static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, chan = chanctx_conf->def.chan; rcu_read_unlock(); - if (ifmgd->assoc_data && !ifmgd->assoc_data->have_beacon && + if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon && ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) { ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems); ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems); ifmgd->assoc_data->have_beacon = true; + ifmgd->assoc_data->need_beacon = false; /* continue assoc process */ ifmgd->assoc_data->timeout = jiffies; run_again(ifmgd, ifmgd->assoc_data->timeout); @@ -2711,6 +2713,19 @@ static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, elems.wmm_param_len)) changed |= BSS_CHANGED_QOS; + /* + * If we haven't had a beacon before, tell the driver about the + * DTIM period now. + */ + if (!bss_conf->dtim_period) { + /* a few bogus AP send dtim_period = 0 or no TIM IE */ + if (elems.tim) + bss_conf->dtim_period = elems.tim->dtim_period ?: 1; + else + bss_conf->dtim_period = 1; + changed |= BSS_CHANGED_DTIM_PERIOD; + } + if (elems.erp_info && elems.erp_info_len >= 1) { erp_valid = true; erp_value = elems.erp_info[0]; @@ -2989,7 +3004,8 @@ void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) if (ifmgd->assoc_data && time_after(jiffies, ifmgd->assoc_data->timeout)) { - if (!ifmgd->assoc_data->have_beacon || + if ((ifmgd->assoc_data->need_beacon && + !ifmgd->assoc_data->have_beacon) || ieee80211_do_assoc(sdata)) { u8 bssid[ETH_ALEN]; @@ -3776,6 +3792,7 @@ int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; struct ieee80211_bss *bss = (void *)req->bss->priv; struct ieee80211_mgd_assoc_data *assoc_data; + const struct cfg80211_bss_ies *beacon_ies; struct ieee80211_supported_band *sband; const u8 *ssidie, *ht_ie, *vht_ie; int i, err; @@ -3941,38 +3958,35 @@ int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, if (err) goto err_clear; - if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD) { - const struct cfg80211_bss_ies *beacon_ies; + rcu_read_lock(); + beacon_ies = rcu_dereference(req->bss->beacon_ies); - rcu_read_lock(); - beacon_ies = rcu_dereference(req->bss->beacon_ies); - if (!beacon_ies) { - /* - * Wait up to one beacon interval ... - * should this be more if we miss one? - */ - sdata_info(sdata, "waiting for beacon from %pM\n", - ifmgd->bssid); - assoc_data->timeout = - TU_TO_EXP_TIME(req->bss->beacon_interval); - } else { - const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, - beacon_ies->data, - beacon_ies->len); - if (tim_ie && tim_ie[1] >= - sizeof(struct ieee80211_tim_ie)) { - const struct ieee80211_tim_ie *tim; - tim = (void *)(tim_ie + 2); - ifmgd->dtim_period = tim->dtim_period; - } - assoc_data->have_beacon = true; - assoc_data->timeout = jiffies; + if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC && + !beacon_ies) { + /* + * Wait up to one beacon interval ... + * should this be more if we miss one? + */ + sdata_info(sdata, "waiting for beacon from %pM\n", + ifmgd->bssid); + assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval); + assoc_data->need_beacon = true; + } else if (beacon_ies) { + const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, + beacon_ies->data, + beacon_ies->len); + if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) { + const struct ieee80211_tim_ie *tim; + tim = (void *)(tim_ie + 2); + ifmgd->dtim_period = tim->dtim_period; } - rcu_read_unlock(); - } else { assoc_data->have_beacon = true; assoc_data->timeout = jiffies; + } else { + assoc_data->timeout = jiffies; } + rcu_read_unlock(); + run_again(ifmgd, assoc_data->timeout); if (bss->corrupt_data) { |