TDLS: Add channel-switch capability flag

Propagate a driver TDLS channel-switch support bit from nl80211 to
TDLS code.

Signed-off-by: Arik Nemtsov <arikx.nemtsov@intel.com>

src/drivers/driver.h

@@ -1160,6 +1160,8 @@ struct wpa_driver_capa {
 #define WPA_DRIVER_FLAGS_ACS_OFFLOAD		0x0000000200000000ULL
 /** Driver supports key management offload */
 #define WPA_DRIVER_FLAGS_KEY_MGMT_OFFLOAD	0x0000000400000000ULL
+/** Driver supports TDLS channel switching */
+#define WPA_DRIVER_FLAGS_TDLS_CHANNEL_SWITCH	0x0000000800000000ULL
 	u64 flags;
 
 #define WPA_DRIVER_SMPS_MODE_STATIC			0x00000001

src/drivers/driver_nl80211_capa.c

@@ -358,6 +358,11 @@ static void wiphy_info_feature_flags(struct wiphy_info_data *info,
 	if (flags & NL80211_FEATURE_AP_MODE_CHAN_WIDTH_CHANGE)
 		capa->flags |= WPA_DRIVER_FLAGS_HT_2040_COEX;
 
+	if (flags & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) {
+		wpa_printf(MSG_DEBUG, "nl80211: TDLS channel switch");
+		capa->flags |= WPA_DRIVER_FLAGS_TDLS_CHANNEL_SWITCH;
+	}
+
 	if (flags & NL80211_FEATURE_LOW_PRIORITY_SCAN)
 		info->have_low_prio_scan = 1;
 

src/rsn_supp/tdls.c

@@ -2742,7 +2742,8 @@ int wpa_tdls_init(struct wpa_sm *sm)
 	 * are assumed to perform everything internally
 	 */
 	if (wpa_sm_tdls_get_capa(sm, &sm->tdls_supported,
-				 &sm->tdls_external_setup) < 0) {
+				 &sm->tdls_external_setup,
+				 &sm->tdls_chan_switch) < 0) {
 		sm->tdls_supported = 1;
 		sm->tdls_external_setup = 0;
 	}
@@ -2751,6 +2752,8 @@ int wpa_tdls_init(struct wpa_sm *sm)
 		   "driver", sm->tdls_supported ? "" : " not");
 	wpa_printf(MSG_DEBUG, "TDLS: Driver uses %s link setup",
 		   sm->tdls_external_setup ? "external" : "internal");
+	wpa_printf(MSG_DEBUG, "TDLS: Driver %s TDLS channel switching",
+		   sm->tdls_chan_switch ? "supports" : "does not support");
 
 	return 0;
 }

src/rsn_supp/wpa.h

@@ -51,7 +51,7 @@ struct wpa_sm_ctx {
 	int (*mark_authenticated)(void *ctx, const u8 *target_ap);
 #ifdef CONFIG_TDLS
 	int (*tdls_get_capa)(void *ctx, int *tdls_supported,
-			     int *tdls_ext_setup);
+			     int *tdls_ext_setup, int *tdls_chan_switch);
 	int (*send_tdls_mgmt)(void *ctx, const u8 *dst,
 			      u8 action_code, u8 dialog_token,
 			      u16 status_code, u32 peer_capab,

src/rsn_supp/wpa_i.h

@@ -102,6 +102,9 @@ struct wpa_sm {
 	 * to it via tdls_mgmt.
 	 */
 	int tdls_external_setup;
+
+	/* The driver supports TDLS channel switching */
+	int tdls_chan_switch;
 #endif /* CONFIG_TDLS */
 
 #ifdef CONFIG_IEEE80211R
@@ -257,11 +260,12 @@ static inline void wpa_sm_set_rekey_offload(struct wpa_sm *sm)
 #ifdef CONFIG_TDLS
 static inline int wpa_sm_tdls_get_capa(struct wpa_sm *sm,
 				       int *tdls_supported,
-				       int *tdls_ext_setup)
+				       int *tdls_ext_setup,
+				       int *tdls_chan_switch)
 {
 	if (sm->ctx->tdls_get_capa)
 		return sm->ctx->tdls_get_capa(sm->ctx->ctx, tdls_supported,
-					      tdls_ext_setup);
+					      tdls_ext_setup, tdls_chan_switch);
 	return -1;
 }
 

wpa_supplicant/wpas_glue.c

@@ -609,12 +609,14 @@ static int wpa_supplicant_mark_authenticated(void *ctx, const u8 *target_ap)
 #ifdef CONFIG_TDLS
 
 static int wpa_supplicant_tdls_get_capa(void *ctx, int *tdls_supported,
-					int *tdls_ext_setup)
+					int *tdls_ext_setup,
+					int *tdls_chan_switch)
 {
 	struct wpa_supplicant *wpa_s = ctx;
 
 	*tdls_supported = 0;
 	*tdls_ext_setup = 0;
+	*tdls_chan_switch = 0;
 
 	if (!wpa_s->drv_capa_known)
 		return -1;
@@ -625,6 +627,9 @@ static int wpa_supplicant_tdls_get_capa(void *ctx, int *tdls_supported,
 	if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_TDLS_EXTERNAL_SETUP)
 		*tdls_ext_setup = 1;
 
+	if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_TDLS_CHANNEL_SWITCH)
+		*tdls_chan_switch = 1;
+
 	return 0;
 }