mac80211: in ADHOC don't update last_rx if sta is not authorized

It does not make sense to keep a station alive if it is not authorised
at all. If IBSS/RSN is used it could also be the case that something
went wrong during the keys exchange and the stations ended up in a not
recoverable state.

By not updating last_rx we are giving the station a chance to be
deleted and to start the key exchange once again from scratch.

Signed-off-by: Antonio Quartulli <antonio@open-mesh.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
index ec87902..b2ae2ba 100644 (file)
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -1341,13 +1341,17 @@ ieee80211_rx_h_sta_process(struct ieee80211_rx_data *rx)
 
        /*
         * Update last_rx only for IBSS packets which are for the current
-        * BSSID to avoid keeping the current IBSS network alive in cases
-        * where other STAs start using different BSSID.
+        * BSSID and for station already AUTHORIZED to avoid keeping the
+        * current IBSS network alive in cases where other STAs start
+        * using different BSSID. This will also give the station another
+        * chance to restart the authentication/authorization in case
+        * something went wrong the first time.
         */
        if (rx->sdata->vif.type == NL80211_IFTYPE_ADHOC) {
                u8 *bssid = ieee80211_get_bssid(hdr, rx->skb->len,
                                                NL80211_IFTYPE_ADHOC);
-               if (ether_addr_equal(bssid, rx->sdata->u.ibss.bssid)) {
+               if (ether_addr_equal(bssid, rx->sdata->u.ibss.bssid) &&
+                   test_sta_flag(sta, WLAN_STA_AUTHORIZED)) {
                        sta->last_rx = jiffies;
                        if (ieee80211_is_data(hdr->frame_control)) {
                                sta->last_rx_rate_idx = status->rate_idx;