mac80211/cfg80211: Add BSS configuration options for AP mode

This change adds a new cfg80211 command, NL80211_CMD_SET_BSS, to allow
AP mode BSS parameters to be changed from user space (e.g., hostapd).
The drivers using mac80211 are expected to be modified with separate
changes to use the new BSS info parameter for short slot time in the
bss_info_changed() handler.

Signed-off-by: Jouni Malinen <jouni.malinen@atheros.com>
Acked-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 22 insertions, 0 deletions

diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index e00750836ba5..7afef14d5c5b 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -268,6 +268,23 @@ struct mpath_info {
         u8 flags;
 };
 
+/**
+ * struct bss_parameters - BSS parameters
+ *
+ * Used to change BSS parameters (mainly for AP mode).
+ *
+ * @use_cts_prot: Whether to use CTS protection
+ *      (0 = no, 1 = yes, -1 = do not change)
+ * @use_short_preamble: Whether the use of short preambles is allowed
+ *      (0 = no, 1 = yes, -1 = do not change)
+ * @use_short_slot_time: Whether the use of short slot time is allowed
+ *      (0 = no, 1 = yes, -1 = do not change)
+ */
+struct bss_parameters {
+        int use_cts_prot;
+        int use_short_preamble;
+        int use_short_slot_time;
+};
 
 /* from net/wireless.h */
 struct wiphy;
@@ -318,6 +335,8 @@ struct wiphy;
  * @change_station: Modify a given station.
  *
  * @set_mesh_cfg: set mesh parameters (by now, just mesh id)
+ *
+ * @change_bss: Modify parameters for a given BSS.
  */
 struct cfg80211_ops {
         int     (*add_virtual_intf)(struct wiphy *wiphy, char *name,
@@ -370,6 +389,9 @@ struct cfg80211_ops {
         int     (*dump_mpath)(struct wiphy *wiphy, struct net_device *dev,
                                int idx, u8 *dst, u8 *next_hop,
                                struct mpath_info *pinfo);
+
+        int     (*change_bss)(struct wiphy *wiphy, struct net_device *dev,
+                              struct bss_parameters *params);
 };
 
 #endif /* __NET_CFG80211_H */