mac80211: 802.11p OCB mode support

This patch adds 802.11p OCB (Outside the Context of a BSS) mode
support.

When communicating in OCB mode a mandatory wildcard BSSID
(48 '1' bits) is used.

The EDCA parameters handling function was changed to support
802.11p specific values.

The insertion of a newly discovered STAs is done in the similar way
as in the IBSS mode -- through the deferred insertion.

The OCB mode uses a periodic 'housekeeping task' for expiration of
disconnected STAs (in the similar manner as in the MESH mode).

New Kconfig option for verbose OCB debugging outputs is added.

Signed-off-by: Rostislav Lisovy <rostislav.lisovy@fel.cvut.cz>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

1 files changed, 19 insertions, 1 deletions

diff --git a/net/mac80211/iface.c b/net/mac80211/iface.c
index d69e7532095f..6b631c049eba 100644
--- a/net/mac80211/iface.c
+++ b/net/mac80211/iface.c
@@ -259,6 +259,15 @@ static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata,
         list_for_each_entry(nsdata, &local->interfaces, list) {
                 if (nsdata != sdata && ieee80211_sdata_running(nsdata)) {
                         /*
+                         * Only OCB and monitor mode may coexist
+                         */
+                        if ((sdata->vif.type == NL80211_IFTYPE_OCB &&
+                             nsdata->vif.type != NL80211_IFTYPE_MONITOR) ||
+                            (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
+                             nsdata->vif.type == NL80211_IFTYPE_OCB))
+                                return -EBUSY;
+
+                        /*
                          * Allow only a single IBSS interface to be up at any
                          * time. This is restricted because beacon distribution
                          * cannot work properly if both are in the same IBSS.
@@ -1283,6 +1292,9 @@ static void ieee80211_iface_work(struct work_struct *work)
                         break;
                 ieee80211_mesh_work(sdata);
                 break;
+        case NL80211_IFTYPE_OCB:
+                ieee80211_ocb_work(sdata);
+                break;
         default:
                 break;
         }
@@ -1302,6 +1314,9 @@ static void ieee80211_recalc_smps_work(struct work_struct *work)
 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
                                   enum nl80211_iftype type)
 {
+        static const u8 bssid_wildcard[ETH_ALEN] = {0xff, 0xff, 0xff,
+                                                    0xff, 0xff, 0xff};
+
         /* clear type-dependent union */
         memset(&sdata->u, 0, sizeof(sdata->u));
 
@@ -1354,7 +1369,8 @@ static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
                 ieee80211_sta_setup_sdata(sdata);
                 break;
         case NL80211_IFTYPE_OCB:
-                /* to be implemented in the future */
+                sdata->vif.bss_conf.bssid = bssid_wildcard;
+                ieee80211_ocb_setup_sdata(sdata);
                 break;
         case NL80211_IFTYPE_ADHOC:
                 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
@@ -1403,6 +1419,7 @@ static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
         case NL80211_IFTYPE_AP:
         case NL80211_IFTYPE_STATION:
         case NL80211_IFTYPE_ADHOC:
+        case NL80211_IFTYPE_OCB:
                 /*
                  * Could maybe also all others here?
                  * Just not sure how that interacts
@@ -1418,6 +1435,7 @@ static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
         case NL80211_IFTYPE_AP:
         case NL80211_IFTYPE_STATION:
         case NL80211_IFTYPE_ADHOC:
+        case NL80211_IFTYPE_OCB:
                 /*
                  * Could probably support everything
                  * but WDS here (WDS do_open can fail