ap_scanner.c

/**
 * @file ap_scanner.c
 * @author risinek (risinek@gmail.com)
 * @date 2021-04-05
 * @copyright Copyright (c) 2021
 * 
 * @brief Implements AP scanning functionality.
 */
#include "ap_scanner.h"

#define LOG_LOCAL_LEVEL ESP_LOG_VERBOSE
#include "esp_log.h"
#include "esp_err.h"
#include "esp_wifi.h"

static const char* TAG = "wifi_controller/ap_scanner";
/**
 * @brief Stores last scanned AP records into linked list.
 * 
 */
static wifictl_ap_records_t ap_records;

void wifictl_scan_nearby_aps(){
    ESP_LOGD(TAG, "Scanning nearby APs...");

    ap_records.count = CONFIG_SCAN_MAX_AP;

    wifi_scan_config_t scan_config = {
        .ssid = NULL,
        .bssid = NULL,
        .channel = 0,
        .scan_type = WIFI_SCAN_TYPE_ACTIVE
    };
    
    ESP_ERROR_CHECK(esp_wifi_scan_start(&scan_config, true));
    ESP_ERROR_CHECK(esp_wifi_scan_get_ap_records(&ap_records.count, ap_records.records));
    ESP_LOGI(TAG, "Found %u APs.", ap_records.count);
    ESP_LOGD(TAG, "Scan done.");
}

const wifictl_ap_records_t *wifictl_get_ap_records() {
    return &ap_records;
}

const wifi_ap_record_t *wifictl_get_ap_record(unsigned index) {
    if(index > ap_records.count){
        ESP_LOGE(TAG, "Index out of bounds! %u records available, but %u requested", ap_records.count, index);
        return NULL;
    }
    return &ap_records.records[index];
}