mac80211: Notify new IBSS network creation

Initialization of beacon transmission in IBSS mode depends
on whether a new BSS is being created or joined. When joining
an existing IBSS network, beaconing has to start only after
a TSF-sync has happened - this is explained in 11.1.4.

Introduce a new parameter in the BSS information structure to
indicate creator/joiner mode.

Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index 89d5bba..71c2f9c 100644 (file)
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -258,6 +258,7 @@ enum ieee80211_rssi_event {
  * @assoc: association status
  * @ibss_joined: indicates whether this station is part of an IBSS
  *     or not
+ * @ibss_creator: indicates if a new IBSS network is being created
  * @aid: association ID number, valid only when @assoc is true
  * @use_cts_prot: use CTS protection
  * @use_short_preamble: use 802.11b short preamble;
@@ -313,6 +314,7 @@ struct ieee80211_bss_conf {
        const u8 *bssid;
        /* association related data */
        bool assoc, ibss_joined;
+       bool ibss_creator;
        u16 aid;
        /* erp related data */
        bool use_cts_prot;

diff --git a/net/mac80211/ibss.c b/net/mac80211/ibss.c
index c6b1448..3d5332e 100644 (file)
--- a/net/mac80211/ibss.c
+++ b/net/mac80211/ibss.c
@@ -38,7 +38,8 @@ static void __ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
                                      const u8 *bssid, const int beacon_int,
                                      struct ieee80211_channel *chan,
                                      const u32 basic_rates,
-                                     const u16 capability, u64 tsf)
+                                     const u16 capability, u64 tsf,
+                                     bool creator)
 {
        struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
        struct ieee80211_local *local = sdata->local;
@@ -71,6 +72,7 @@ static void __ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
        /* if merging, indicate to driver that we leave the old IBSS */
        if (sdata->vif.bss_conf.ibss_joined) {
                sdata->vif.bss_conf.ibss_joined = false;
+               sdata->vif.bss_conf.ibss_creator = false;
                netif_carrier_off(sdata->dev);
                ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_IBSS);
        }
@@ -197,6 +199,7 @@ static void __ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
        bss_change |= BSS_CHANGED_HT;
        bss_change |= BSS_CHANGED_IBSS;
        sdata->vif.bss_conf.ibss_joined = true;
+       sdata->vif.bss_conf.ibss_creator = creator;
        ieee80211_bss_info_change_notify(sdata, bss_change);
 
        ieee80211_sta_def_wmm_params(sdata, sband->n_bitrates, supp_rates);
@@ -249,7 +252,8 @@ static void ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
                                  cbss->channel,
                                  basic_rates,
                                  cbss->capability,
-                                 cbss->tsf);
+                                 cbss->tsf,
+                                 false);
 }
 
 static struct sta_info *ieee80211_ibss_finish_sta(struct sta_info *sta,
@@ -734,7 +738,7 @@ static void ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata)
 
        __ieee80211_sta_join_ibss(sdata, bssid, sdata->vif.bss_conf.beacon_int,
                                  ifibss->channel, ifibss->basic_rates,
-                                 capability, 0);
+                                 capability, 0, true);
 }
 
 /*
@@ -1198,6 +1202,7 @@ int ieee80211_ibss_leave(struct ieee80211_sub_if_data *sdata)
                                        lockdep_is_held(&sdata->u.ibss.mtx));
        RCU_INIT_POINTER(sdata->u.ibss.presp, NULL);
        sdata->vif.bss_conf.ibss_joined = false;
+       sdata->vif.bss_conf.ibss_creator = false;
        ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON_ENABLED |
                                                BSS_CHANGED_IBSS);
        synchronize_rcu();