esp_wifi: Add APIs to check BTM and RRM support of connected AP

components/wpa_supplicant/esp_supplicant/include/esp_rrm.h

@@ -1,17 +1,7 @@
-/**
+/*
- * Copyright 2020 Espressif Systems (Shanghai) PTE LTD
+ * SPDX-FileCopyrightText: 2020-2022 Espressif Systems (Shanghai) CO LTD
  *
- * Licensed under the Apache License, Version 2.0 (the "License");
+ * SPDX-License-Identifier: Apache-2.0
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *   http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
  */
 
 #ifndef _ESP_RRM_H
@@ -41,11 +31,22 @@ typedef void (*neighbor_rep_request_cb)(void *ctx, const uint8_t *report, size_t
   * @param  cb_ctx: callback context
   *
   * @return
-  *    - 0: success else failure
+  *    - 0: success
+  *    - -1: AP does not support RRM
+  *    - -2: station not connected to AP
   */
 int esp_rrm_send_neighbor_rep_request(neighbor_rep_request_cb cb,
 				      void *cb_ctx);
 
+/**
+  * @brief  Check RRM capability of connected AP
+  *
+  * @return
+  *    - true: AP supports RRM
+  *    - false: AP does not support RRM or station not connected to AP
+  */
+bool esp_rrm_is_rrm_supported_connection(void);
+
 #ifdef __cplusplus
 }
 #endif

components/wpa_supplicant/esp_supplicant/include/esp_wnm.h

@@ -36,12 +36,23 @@ enum btm_query_reason {
   * @param  cand_list: whether candidate list to be included from scan results available in supplicant's cache.
   *
   * @return
-  *    - 0: success else failure
+  *    - 0: success
+  *    - -1: AP does not support BTM
+  *    - -2: station not connected to AP
   */
 int esp_wnm_send_bss_transition_mgmt_query(enum btm_query_reason query_reason,
 					   const char *btm_candidates,
 					   int cand_list);
 
+/**
+  * @brief  Check bss trasition capability of connected AP
+  *
+  * @return
+  *    - true: AP supports BTM
+  *    - false: AP does not support BTM or station not connected to AP
+  */
+bool esp_wnm_is_btm_supported_connection(void);
+
 #ifdef __cplusplus
 }
 #endif

components/wpa_supplicant/esp_supplicant/src/esp_common.c

@@ -343,23 +343,83 @@ void esp_supplicant_common_deinit(void)
 	}
 }
 
+bool esp_rrm_is_rrm_supported_connection(void)
+{
+	struct wpa_supplicant *wpa_s = &g_wpa_supp;
+
+	if (!wpa_s->current_bss) {
+		wpa_printf(MSG_DEBUG, "STA not associated, return");
+		return false;
+	}
+
+	if (!(wpa_s->rrm_ie[0] & WLAN_RRM_CAPS_NEIGHBOR_REPORT)) {
+		wpa_printf(MSG_DEBUG,
+			"RRM: No network support for Neighbor Report.");
+		return false;
+	}
+
+	return true;
+}
+
 int esp_rrm_send_neighbor_rep_request(neighbor_rep_request_cb cb,
 				      void *cb_ctx)
 {
+	struct wpa_supplicant *wpa_s = &g_wpa_supp;
 	struct wpa_ssid_value wpa_ssid = {0};
-	struct wifi_ssid *ssid = esp_wifi_sta_get_prof_ssid_internal();
+	struct wifi_ssid *ssid;
+
+	if (!wpa_s->current_bss) {
+		wpa_printf(MSG_ERROR, "STA not associated, return");
+		return -2;
+	}
+
+	if (!(wpa_s->rrm_ie[0] & WLAN_RRM_CAPS_NEIGHBOR_REPORT)) {
+		wpa_printf(MSG_ERROR,
+			"RRM: No network support for Neighbor Report.");
+		return -1;
+	}
+
+	ssid = esp_wifi_sta_get_prof_ssid_internal();
 
 	os_memcpy(wpa_ssid.ssid, ssid->ssid, ssid->len);
 	wpa_ssid.ssid_len = ssid->len;
 
-	return wpas_rrm_send_neighbor_rep_request(&g_wpa_supp, &wpa_ssid, 0, 0, cb, cb_ctx);
+	return wpas_rrm_send_neighbor_rep_request(wpa_s, &wpa_ssid, 0, 0, cb, cb_ctx);
+}
+
+bool esp_wnm_is_btm_supported_connection(void)
+{
+	struct wpa_supplicant *wpa_s = &g_wpa_supp;
+
+	if (!wpa_s->current_bss) {
+		wpa_printf(MSG_DEBUG, "STA not associated, return");
+		return false;
+	}
+
+	if (!wpa_bss_ext_capab(wpa_s->current_bss, WLAN_EXT_CAPAB_BSS_TRANSITION)) {
+		wpa_printf(MSG_DEBUG, "AP doesn't support BTM, return");
+		return false;
+	}
+
+	return true;
 }
 
 int esp_wnm_send_bss_transition_mgmt_query(enum btm_query_reason query_reason,
 					   const char *btm_candidates,
 					   int cand_list)
 {
-	return wnm_send_bss_transition_mgmt_query(&g_wpa_supp, query_reason, btm_candidates, cand_list);
+	struct wpa_supplicant *wpa_s = &g_wpa_supp;
+
+	if (!wpa_s->current_bss) {
+		wpa_printf(MSG_ERROR, "STA not associated, return");
+		return -2;
+	}
+
+	if (!wpa_bss_ext_capab(wpa_s->current_bss, WLAN_EXT_CAPAB_BSS_TRANSITION)) {
+		wpa_printf(MSG_ERROR, "AP doesn't support BTM, return");
+		return -1;
+	}
+	return wnm_send_bss_transition_mgmt_query(wpa_s, query_reason, btm_candidates, cand_list);
 }
 
 int esp_mbo_update_non_pref_chan(struct non_pref_chan_s *non_pref_chan)
@@ -471,9 +531,9 @@ static uint8_t get_extended_caps_ie(uint8_t *ie, size_t len)
 	*pos++ = ext_caps_ie_len;
 	*pos++ = 0;
 	*pos++ = 0;
-#define WLAN_EXT_CAPAB_BSS_TRANSITION BIT(3)
+#define CAPAB_BSS_TRANSITION BIT(3)
-	*pos |= WLAN_EXT_CAPAB_BSS_TRANSITION;
+	*pos |= CAPAB_BSS_TRANSITION;
-#undef WLAN_EXT_CAPAB_BSS_TRANSITION
+#undef CAPAB_BSS_TRANSITION
 	os_memcpy(ie, ext_caps_ie, sizeof(ext_caps_ie));
 
 	return ext_caps_ie_len + 2;

components/wpa_supplicant/src/common/ieee802_11_defs.h

@@ -250,6 +250,8 @@
 #define WLAN_EID_EXT_HE_CAPABILITIES 35
 #define WLAN_EID_EXT_HE_OPERATION 36
 
+#define WLAN_EXT_CAPAB_BSS_TRANSITION 19
+
 /* Action frame categories (IEEE Std 802.11-2016, 9.4.1.11, Table 9-76) */
 #define WLAN_ACTION_SPECTRUM_MGMT 0
 #define WLAN_ACTION_QOS 1

examples/wifi/roaming/main/roaming_example.c

@@ -54,6 +54,17 @@ static void event_handler(void* arg, esp_event_base_t event_base,
 			esp_wifi_set_rssi_threshold(EXAMPLE_WIFI_RSSI_THRESHOLD);
 		}
 #endif
+		if (esp_rrm_is_rrm_supported_connection()) {
+			ESP_LOGI(TAG,"RRM supported");
+		} else {
+			ESP_LOGI(TAG,"RRM not supported");
+		}
+		if (esp_wnm_is_btm_supported_connection()) {
+			ESP_LOGI(TAG,"BTM supported");
+		} else {
+			ESP_LOGI(TAG,"BTM not supported");
+		}
+
 	}
 }