feat(lib): add rx probe request callback function

components/esp8266/include/internal/esp_wifi_internal.h

@@ -40,6 +40,29 @@ wifi_rx_pbuf_mem_type_t esp_wifi_get_rx_pbuf_mem_type(void);
 
 int8_t esp_wifi_get_ap_rssi(void);
 
+/**
+  * @brief The RX callback function when receive probe request packet. 
+  *        When probe request packet is received, the callback function will be called.
+  *
+  * @param frame  Data of received probe request.
+  * @param len  length of received probe request.
+  * @param rssi  rssi of received probe request.
+  */
+typedef void (*wifi_sta_rx_probe_req_t)(const uint8_t *frame, int len, int rssi);
+
+/**
+  * @brief Register the RX callback function when receive probe request.
+  *
+  * When probe request packet is received, the registered callback function will be called.
+  *
+  * @param cb  callback
+  *
+  * @return
+  *    - ESP_OK: succeed
+  *    - ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init
+  */
+esp_err_t esp_wifi_set_sta_rx_probe_req(wifi_sta_rx_probe_req_t cb);
+
 #ifdef __cplusplus
 }
 #endif