1 files changed, 57 insertions, 0 deletions

diff --git a/net/mac80211/chan.c b/net/mac80211/chan.c
new file mode 100644
index 000000000000..08f3832661a5
--- /dev/null
+++ b/net/mac80211/chan.c
@@ -0,0 +1,57 @@
+/*
+ * mac80211 - channel management
+ */
+
+#include "ieee80211_i.h"
+
+enum ieee80211_chan_mode
+__ieee80211_get_channel_mode(struct ieee80211_local *local,
+                             struct ieee80211_sub_if_data *ignore)
+{
+        struct ieee80211_sub_if_data *sdata;
+
+        WARN_ON(!mutex_is_locked(&local->iflist_mtx));
+
+        list_for_each_entry(sdata, &local->interfaces, list) {
+                if (sdata == ignore)
+                        continue;
+
+                if (!ieee80211_sdata_running(sdata))
+                        continue;
+
+                if (sdata->vif.type == NL80211_IFTYPE_MONITOR)
+                        continue;
+
+                if (sdata->vif.type == NL80211_IFTYPE_STATION &&
+                    !sdata->u.mgd.associated)
+                        continue;
+
+                if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
+                        if (!sdata->u.ibss.ssid_len)
+                                continue;
+                        if (!sdata->u.ibss.fixed_channel)
+                                return CHAN_MODE_HOPPING;
+                }
+
+                if (sdata->vif.type == NL80211_IFTYPE_AP &&
+                    !sdata->u.ap.beacon)
+                        continue;
+
+                return CHAN_MODE_FIXED;
+        }
+
+        return CHAN_MODE_UNDEFINED;
+}
+
+enum ieee80211_chan_mode
+ieee80211_get_channel_mode(struct ieee80211_local *local,
+                           struct ieee80211_sub_if_data *ignore)
+{
+        enum ieee80211_chan_mode mode;
+
+        mutex_lock(&local->iflist_mtx);
+        mode = __ieee80211_get_channel_mode(local, ignore);
+        mutex_unlock(&local->iflist_mtx);
+
+        return mode;
+}