Some hardware (i.e. the wl1271) are able to monitor beacons, and send
probe-requests to AP in case of beacon loss independently to try to recover
the connection. In these cases, it is useless for the mac80211 to send
further probe-requests.
Add a new function for the hardware to indicate that the AP has been lost.
This function immediately tears down the connection.
Signed-off-by: Juuso Oikarinen <juuso.oikarinen@xxxxxxxxx>
---
include/net/mac80211.h | 12 ++++++++++++
net/mac80211/mlme.c | 32 ++++++++++++++++++++++++++++++++
2 files changed, 44 insertions(+), 0 deletions(-)
diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index 45d7d44..d9792e4 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -2370,6 +2370,18 @@ void ieee80211_sta_block_awake(struct ieee80211_hw *hw,
*/
void ieee80211_beacon_loss(struct ieee80211_vif *vif);
+/**
+ * ieee80211_probereq_failed - inform hardware has lost connection with the AP
+ *
+ * @vif: &struct ieee80211_vif pointer from the add_interface callback.
+ *
+ * When beacon filtering is enabled with IEEE80211_HW_BEACON_FILTERING and
+ * IEEE80211_CONF_PS is set, the driver needs to inform with this function
+ * whenever the hardware is not receiving beacons and the AP is not responding
+ * to probe requests with this function.
+ */
+void ieee80211_probereq_failed(struct ieee80211_vif *vif);
+
/* Rate control API */
/**
diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index 0ab284c..8f591a4 100644
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -945,6 +945,38 @@ void ieee80211_beacon_loss(struct ieee80211_vif *vif)
}
EXPORT_SYMBOL(ieee80211_beacon_loss);
+void ieee80211_probereq_failed(struct ieee80211_vif *vif)
+{
+ struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
+ struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+ struct ieee80211_local *local = sdata->local;
+ u8 bssid[ETH_ALEN];
+
+ mutex_lock(&ifmgd->mtx);
+ if (!ifmgd->associated) {
+ mutex_unlock(&ifmgd->mtx);
+ return;
+ }
+
+ memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
+
+ printk(KERN_DEBUG "No probe-response from AP %pM, "
+ "disconnected.\n", bssid);
+
+ ieee80211_set_disassoc(sdata);
+ ieee80211_recalc_idle(local);
+ mutex_unlock(&ifmgd->mtx);
+ /*
+ * must be outside lock due to cfg80211,
+ * but that's not a problem.
+ */
+ ieee80211_send_deauth_disassoc(sdata, bssid,
+ IEEE80211_STYPE_DEAUTH,
+ WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
+ NULL);
+}
+EXPORT_SYMBOL(ieee80211_probereq_failed);
+
static enum rx_mgmt_action __must_check
ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
struct ieee80211_mgmt *mgmt, size_t len)
--
1.6.3.3
--
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