Define some related TDLS protocol constants and advertise channel switch
support in the extended-capabilities IE when the feature bit is defined.
Actually supporting TDLS channel-switching also requires support for
some new nl80211 commands, to be introduced by future patches.
Signed-off-by: Arik Nemtsov <arikx.nemtsov@xxxxxxxxx>
Reviewed-by: Johannes Berg <johannes.berg@xxxxxxxxx>
Signed-off-by: Arik Nemtsov <arik@xxxxxxxxxx>
---
include/linux/ieee80211.h | 6 ++++++
include/uapi/linux/nl80211.h | 3 +++
net/mac80211/tdls.c | 9 ++++++---
3 files changed, 15 insertions(+), 3 deletions(-)
diff --git a/include/linux/ieee80211.h b/include/linux/ieee80211.h
index adac1be..fbb02d2 100644
--- a/include/linux/ieee80211.h
+++ b/include/linux/ieee80211.h
@@ -2019,6 +2019,11 @@ enum ieee80211_tdls_actioncode {
*/
#define WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING BIT(2)
+/* TDLS capabilities in the the 4th byte of @WLAN_EID_EXT_CAPABILITY */
+#define WLAN_EXT_CAPA4_TDLS_BUFFER_STA BIT(4)
+#define WLAN_EXT_CAPA4_TDLS_PEER_PSM BIT(5)
+#define WLAN_EXT_CAPA4_TDLS_CHAN_SWITCH BIT(6)
+
/* Interworking capabilities are set in 7th bit of 4th byte of the
* @WLAN_EID_EXT_CAPABILITY information element
*/
@@ -2030,6 +2035,7 @@ enum ieee80211_tdls_actioncode {
*/
#define WLAN_EXT_CAPA5_TDLS_ENABLED BIT(5)
#define WLAN_EXT_CAPA5_TDLS_PROHIBITED BIT(6)
+#define WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED BIT(7)
#define WLAN_EXT_CAPA8_OPMODE_NOTIF BIT(6)
#define WLAN_EXT_CAPA8_TDLS_WIDE_BW_ENABLED BIT(7)
diff --git a/include/uapi/linux/nl80211.h b/include/uapi/linux/nl80211.h
index 9b3025e..e7f01d6 100644
--- a/include/uapi/linux/nl80211.h
+++ b/include/uapi/linux/nl80211.h
@@ -4070,6 +4070,8 @@ enum nl80211_ap_sme_features {
* @NL80211_FEATURE_MAC_ON_CREATE: Device supports configuring
* the vif's MAC address upon creation.
* See 'macaddr' field in the vif_params (cfg80211.h).
+ * @NL80211_FEATURE_TDLS_CHANNEL_SWITCH: Driver supports channel switching when
+ * operating as a TDLS peer.
*/
enum nl80211_feature_flags {
NL80211_FEATURE_SK_TX_STATUS = 1 << 0,
@@ -4100,6 +4102,7 @@ enum nl80211_feature_flags {
NL80211_FEATURE_DYNAMIC_SMPS = 1 << 25,
NL80211_FEATURE_SUPPORTS_WMM_ADMISSION = 1 << 26,
NL80211_FEATURE_MAC_ON_CREATE = 1 << 27,
+ NL80211_FEATURE_TDLS_CHANNEL_SWITCH = 1 << 28,
};
/**
diff --git a/net/mac80211/tdls.c b/net/mac80211/tdls.c
index 30a4c10..4554bdc 100644
--- a/net/mac80211/tdls.c
+++ b/net/mac80211/tdls.c
@@ -35,16 +35,19 @@ void ieee80211_tdls_peer_del_work(struct work_struct *wk)
mutex_unlock(&local->mtx);
}
-static void ieee80211_tdls_add_ext_capab(struct sk_buff *skb)
+static void ieee80211_tdls_add_ext_capab(struct ieee80211_local *local,
+ struct sk_buff *skb)
{
u8 *pos = (void *)skb_put(skb, 7);
+ bool chan_switch = local->hw.wiphy->features &
+ NL80211_FEATURE_TDLS_CHANNEL_SWITCH;
*pos++ = WLAN_EID_EXT_CAPABILITY;
*pos++ = 5; /* len */
*pos++ = 0x0;
*pos++ = 0x0;
*pos++ = 0x0;
- *pos++ = 0x0;
+ *pos++ = chan_switch ? WLAN_EXT_CAPA4_TDLS_CHAN_SWITCH : 0;
*pos++ = WLAN_EXT_CAPA5_TDLS_ENABLED;
}
@@ -289,7 +292,7 @@ ieee80211_tdls_add_setup_start_ies(struct ieee80211_sub_if_data *sdata,
offset = noffset;
}
- ieee80211_tdls_add_ext_capab(skb);
+ ieee80211_tdls_add_ext_capab(local, skb);
/* add the QoS element if we support it */
if (local->hw.queues >= IEEE80211_NUM_ACS &&
--
1.9.1
--
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