snapclient/components/esp_peripherals/periph_wifi.c

/*
 * ESPRESSIF MIT License
 *
 * Copyright (c) 2018 <ESPRESSIF SYSTEMS (SHANGHAI) PTE LTD>
 *
 * Permission is hereby granted for use on all ESPRESSIF SYSTEMS products, in
 * which case, it is free of charge, to any person obtaining a copy of this
 * software and associated documentation files (the "Software"), to deal in the
 * Software without restriction, including without limitation the rights to
 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
 * IN THE SOFTWARE.
 *
 */

#include "esp_event.h"
#include "esp_log.h"
#include "esp_smartconfig.h"
#include "esp_wifi.h"
#include "esp_wpa2.h"
#include <string.h>

#include "audio_mem.h"
#include "esp_peripherals.h"
#include "periph_wifi.h"
#include "wifibleconfig.h"

#if __has_include("esp_idf_version.h")
#include "esp_idf_version.h"
#else
#define ESP_IDF_VERSION_VAL(major, minor, patch) 1
#endif

static const char *TAG = "PERIPH_WIFI";

#define VALIDATE_WIFI(periph, ret)                                            \
  if (!(periph && esp_periph_get_id (periph) == PERIPH_ID_WIFI))              \
    {                                                                         \
      ESP_LOGE (TAG, "Invalid WIFI periph, at line %d", __LINE__);            \
      return ret;                                                             \
    }

#define DEFAULT_RECONNECT_TIMEOUT_MS (1000)

/* Constants that aren't configurable in menuconfig */
#define EAP_PEAP 1
#define EAP_TTLS 2

typedef struct periph_wifi *periph_wifi_handle_t;

struct periph_wifi
{
  periph_wifi_state_t wifi_state;
  bool disable_auto_reconnect;
  bool is_open;
  uint8_t max_recon_time;
  char *ssid;
  char *password;
  EventGroupHandle_t state_event;
  int reconnect_timeout_ms;
  periph_wifi_config_mode_t config_mode;
  periph_wpa2_enterprise_cfg_t *wpa2_e_cfg;
};

static const int CONNECTED_BIT = BIT0;
static const int DISCONNECTED_BIT = BIT1;
static const int SMARTCONFIG_DONE_BIT = BIT2;
static const int SMARTCONFIG_ERROR_BIT = BIT3;

static esp_periph_handle_t g_periph = NULL;

esp_err_t
periph_wifi_wait_for_connected (esp_periph_handle_t periph,
                                TickType_t tick_to_wait)
{
  VALIDATE_WIFI (periph, ESP_FAIL);
  periph_wifi_handle_t periph_wifi
      = (periph_wifi_handle_t)esp_periph_get_data (periph);
  EventBits_t connected_bit = xEventGroupWaitBits (
      periph_wifi->state_event, CONNECTED_BIT, false, true, tick_to_wait);
  if (connected_bit & CONNECTED_BIT)
    {
      return ESP_OK;
    }
#ifdef CONFIG_BLUEDROID_ENABLED
  if (periph_wifi->config_mode == WIFI_CONFIG_BLUEFI)
    {
      ble_config_stop ();
    }
#endif
  return ESP_FAIL;
}

periph_wifi_state_t
periph_wifi_is_connected (esp_periph_handle_t periph)
{
  VALIDATE_WIFI (periph, false);
  periph_wifi_handle_t wifi
      = (periph_wifi_handle_t)esp_periph_get_data (periph);
  return wifi->wifi_state;
}

#if (ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(4, 0, 0))
static void
_wifi_smartconfig_event_callback (void *arg, esp_event_base_t event_base,
                                  int32_t event_id, void *event_data)
{
  wifi_config_t sta_conf;
  periph_wifi_handle_t periph_wifi
      = (periph_wifi_handle_t)esp_periph_get_data (g_periph);
  switch (event_id)
    {
    case SC_EVENT_SCAN_DONE:
      ESP_LOGD (TAG, "SC_EVENT_SCAN_DONE");
      break;

    case SC_EVENT_FOUND_CHANNEL:
      ESP_LOGD (TAG, "SC_EVENT_FOUND_CHANNEL");
      break;

    case SC_EVENT_GOT_SSID_PSWD:
      ESP_LOGE (TAG, "SC_EVENT_GOT_SSID_PSWD");
      smartconfig_event_got_ssid_pswd_t *evt
          = (smartconfig_event_got_ssid_pswd_t *)event_data;
      memset (&sta_conf, 0x00, sizeof (sta_conf));
      memcpy (sta_conf.sta.ssid, evt->ssid, sizeof (sta_conf.sta.ssid));
      memcpy (sta_conf.sta.password, evt->password,
              sizeof (sta_conf.sta.password));
      sta_conf.sta.bssid_set = evt->bssid_set;
      if (sta_conf.sta.bssid_set == true)
        {
          memcpy (sta_conf.sta.bssid, evt->bssid, sizeof (sta_conf.sta.bssid));
        }
      ESP_LOGE (TAG, "SSID=%s, PASS=%s", sta_conf.sta.ssid,
                sta_conf.sta.password);

      esp_wifi_disconnect ();

      if (esp_wifi_set_config (WIFI_IF_STA, &sta_conf) != ESP_OK)
        {
          periph_wifi->wifi_state = PERIPH_WIFI_CONFIG_ERROR;
          xEventGroupSetBits (periph_wifi->state_event, SMARTCONFIG_ERROR_BIT);
        }
      if (esp_wifi_connect () != ESP_OK)
        {
          periph_wifi->wifi_state = PERIPH_WIFI_CONFIG_ERROR;
          xEventGroupSetBits (periph_wifi->state_event, SMARTCONFIG_ERROR_BIT);
          esp_periph_send_event (g_periph, PERIPH_WIFI_CONFIG_ERROR, NULL, 0);
          break;
        }
      break;

    case SC_EVENT_SEND_ACK_DONE:
      ESP_LOGE (TAG, "SC_EVENT_SEND_ACK_DONE");

      periph_wifi->wifi_state = PERIPH_WIFI_CONFIG_DONE;
      esp_periph_send_event (g_periph, PERIPH_WIFI_CONFIG_DONE, NULL, 0);
      xEventGroupSetBits (periph_wifi->state_event, SMARTCONFIG_DONE_BIT);
      esp_smartconfig_stop ();
      break;
    }
}
#else
static void
_wifi_smartconfig_event_callback (smartconfig_status_t status, void *pdata)
{
  wifi_config_t sta_conf;
  smartconfig_type_t *type;
  periph_wifi_handle_t periph_wifi
      = (periph_wifi_handle_t)esp_periph_get_data (g_periph);
  switch (status)
    {
    case SC_STATUS_WAIT:
      ESP_LOGD (TAG, "SC_STATUS_WAIT");
      break;

    case SC_STATUS_FIND_CHANNEL:
      ESP_LOGD (TAG, "SC_STATUS_FIND_CHANNEL");
      break;

    case SC_STATUS_GETTING_SSID_PSWD:
      type = pdata;
      ESP_LOGD (TAG, "SC_STATUS_GETTING_SSID_PSWD, SC_TYPE=%d", (int)*type);
      break;

    case SC_STATUS_LINK:
      ESP_LOGE (TAG, "SC_STATUS_LINK");
      memset (&sta_conf, 0x00, sizeof (sta_conf));
      memcpy (&sta_conf.sta, pdata, sizeof (wifi_sta_config_t));
      ESP_LOGE (TAG, "SSID=%s, PASS=%s", sta_conf.sta.ssid,
                sta_conf.sta.password);
      esp_wifi_disconnect ();

      if (esp_wifi_set_config (WIFI_IF_STA, &sta_conf) != ESP_OK)
        {
          periph_wifi->wifi_state = PERIPH_WIFI_CONFIG_ERROR;
          xEventGroupSetBits (periph_wifi->state_event, SMARTCONFIG_ERROR_BIT);
        }
      if (esp_wifi_connect () != ESP_OK)
        {
          periph_wifi->wifi_state = PERIPH_WIFI_CONFIG_ERROR;
          xEventGroupSetBits (periph_wifi->state_event, SMARTCONFIG_ERROR_BIT);
          esp_periph_send_event (g_periph, PERIPH_WIFI_CONFIG_ERROR, NULL, 0);
          break;
        }
      break;

    case SC_STATUS_LINK_OVER:
      ESP_LOGE (TAG, "SC_STATUS_LINK_OVER");

      if (pdata != NULL)
        {
          char phone_ip[4] = { 0 };
          memcpy (phone_ip, (const void *)pdata, 4);
          ESP_LOGD (TAG, "Phone ip: %d.%d.%d.%d", phone_ip[0], phone_ip[1],
                    phone_ip[2], phone_ip[3]);
          periph_wifi->wifi_state = PERIPH_WIFI_CONFIG_DONE;
          esp_periph_send_event (g_periph, PERIPH_WIFI_CONFIG_DONE, NULL, 0);
          xEventGroupSetBits (periph_wifi->state_event, SMARTCONFIG_DONE_BIT);
        }
      else
        {
          periph_wifi->wifi_state = PERIPH_WIFI_CONFIG_ERROR;
          esp_periph_send_event (g_periph, PERIPH_WIFI_CONFIG_ERROR, NULL, 0);
          xEventGroupSetBits (periph_wifi->state_event, SMARTCONFIG_ERROR_BIT);
        }
      esp_smartconfig_stop ();
      break;
    }
}
#endif

esp_err_t
periph_wifi_wait_for_disconnected (esp_periph_handle_t periph,
                                   TickType_t tick_to_wait)
{
  VALIDATE_WIFI (periph, ESP_FAIL);
  periph_wifi_handle_t periph_wifi
      = (periph_wifi_handle_t)esp_periph_get_data (periph);
  EventBits_t disconnected_bit = xEventGroupWaitBits (
      periph_wifi->state_event, DISCONNECTED_BIT, false, true, tick_to_wait);
  if (disconnected_bit & DISCONNECTED_BIT)
    {
      return ESP_OK;
    }
  return ESP_FAIL;
}

esp_err_t
periph_wifi_config_start (esp_periph_handle_t periph,
                          periph_wifi_config_mode_t mode)
{
  VALIDATE_WIFI (periph, ESP_FAIL);
  periph_wifi_handle_t periph_wifi
      = (periph_wifi_handle_t)esp_periph_get_data (periph);
  esp_err_t err = ESP_OK;
  periph_wifi->disable_auto_reconnect = true;
  periph_wifi->config_mode = mode;
  esp_wifi_disconnect ();

  if (periph_wifi_wait_for_disconnected (periph, portMAX_DELAY) != ESP_OK)
    {
      return ESP_FAIL;
    }
  periph_wifi->wifi_state = PERIPH_WIFI_SETTING;
  if (mode >= WIFI_CONFIG_ESPTOUCH && mode <= WIFI_CONFIG_ESPTOUCH_AIRKISS)
    {
      err = ESP_OK; // 0;
      // esp_wifi_start();
      err |= esp_smartconfig_set_type (mode);
      err |= esp_smartconfig_fast_mode (true);
#if (ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(4, 0, 0))
      smartconfig_start_config_t cfg = SMARTCONFIG_START_CONFIG_DEFAULT ();
      err |= esp_smartconfig_start (&cfg);
      esp_event_handler_register (SC_EVENT, ESP_EVENT_ANY_ID,
                                  &_wifi_smartconfig_event_callback, NULL);
#else
      err |= esp_smartconfig_start (_wifi_smartconfig_event_callback, 0);
#endif
      xEventGroupClearBits (periph_wifi->state_event, SMARTCONFIG_DONE_BIT);
      xEventGroupClearBits (periph_wifi->state_event, SMARTCONFIG_ERROR_BIT);
    }
  else if (mode == WIFI_CONFIG_WPS)
    {
      // todo : add wps
      return ESP_OK;
    }
  else if (mode == WIFI_CONFIG_BLUEFI)
    {
#ifdef CONFIG_BLUEDROID_ENABLED
      ble_config_start (periph);
#endif
      return ESP_OK;
    }

  return err;
}

esp_err_t
periph_wifi_config_wait_done (esp_periph_handle_t periph,
                              TickType_t tick_to_wait)
{
  VALIDATE_WIFI (periph, ESP_FAIL);
  periph_wifi_handle_t periph_wifi
      = (periph_wifi_handle_t)esp_periph_get_data (periph);
  EventBits_t wificonfig_bit = xEventGroupWaitBits (
      periph_wifi->state_event, SMARTCONFIG_DONE_BIT | SMARTCONFIG_ERROR_BIT,
      false, false, tick_to_wait);

  if (wificonfig_bit & SMARTCONFIG_DONE_BIT)
    {
      return ESP_OK;
    }
  if (wificonfig_bit & SMARTCONFIG_ERROR_BIT)
    {
      return ESP_FAIL;
    }
  esp_smartconfig_stop ();
  return ESP_FAIL;
}

static void
wifi_reconnect_timer (xTimerHandle tmr)
{
  esp_periph_handle_t periph = (esp_periph_handle_t)pvTimerGetTimerID (tmr);
  periph_wifi_handle_t periph_wifi
      = (periph_wifi_handle_t)esp_periph_get_data (periph);
  esp_periph_stop_timer (periph);
  if (periph_wifi->disable_auto_reconnect != true)
    {
      esp_wifi_connect ();
    }
}

#if (ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(4, 0, 0))
static void
_wifi_event_callback (void *arg, esp_event_base_t event_base, int32_t event_id,
                      void *event_data)
{
  esp_periph_handle_t self = (esp_periph_handle_t)arg;
  periph_wifi_handle_t periph_wifi
      = (periph_wifi_handle_t)esp_periph_get_data (self);
  if (event_base == WIFI_EVENT && event_id == WIFI_EVENT_STA_START)
    {
      esp_wifi_connect ();
    }
  else if (event_base == IP_EVENT && event_id == IP_EVENT_STA_GOT_IP)
    {
      ip_event_got_ip_t *event = (ip_event_got_ip_t *)event_data;
      ESP_LOGI (TAG, "Got ip:" IPSTR, IP2STR (&event->ip_info.ip));
      periph_wifi->wifi_state = PERIPH_WIFI_CONNECTED;
      xEventGroupClearBits (periph_wifi->state_event, DISCONNECTED_BIT);
      esp_periph_send_event (self, PERIPH_WIFI_CONNECTED, NULL, 0);
      xEventGroupSetBits (periph_wifi->state_event, CONNECTED_BIT);
      wifi_config_t w_config;
      memset (&w_config, 0x00, sizeof (wifi_config_t));
      esp_wifi_get_config (WIFI_IF_STA, &w_config);
      strcpy (periph_wifi->ssid, (char *)w_config.sta.ssid);
    }
  else if (event_base == WIFI_EVENT && event_id == WIFI_EVENT_STA_DISCONNECTED)
    {
      periph_wifi->wifi_state = PERIPH_WIFI_DISCONNECTED;
      xEventGroupClearBits (periph_wifi->state_event, CONNECTED_BIT);
      xEventGroupSetBits (periph_wifi->state_event, DISCONNECTED_BIT);
      esp_periph_send_event (self, PERIPH_WIFI_DISCONNECTED, NULL, 0);

      ESP_LOGW (TAG,
                "Wi-Fi disconnected from SSID %s, auto-reconnect %s, "
                "reconnect after %d ms",
                periph_wifi->ssid,
                periph_wifi->disable_auto_reconnect == 0 ? "enabled"
                                                         : "disabled",
                periph_wifi->reconnect_timeout_ms);
      if (periph_wifi->disable_auto_reconnect)
        {
          return;
        }
      esp_periph_start_timer (
          self, periph_wifi->reconnect_timeout_ms / portTICK_RATE_MS,
          wifi_reconnect_timer);
    }
  else
    {
      ESP_LOGW (TAG, "WiFi Event cb, Unhandle event_base:%s, event_id:%d",
                event_base, event_id);
    }
}
#else
static esp_err_t
_wifi_event_callback (void *ctx, system_event_t *event)
{
  esp_periph_handle_t self = (esp_periph_handle_t)ctx;
  periph_wifi_handle_t periph_wifi
      = (periph_wifi_handle_t)esp_periph_get_data (self);
  switch (event->event_id)
    {
    case SYSTEM_EVENT_STA_START:
      periph_wifi->wifi_state = PERIPH_WIFI_CONNECTING;
      esp_wifi_connect ();
      break;

    case SYSTEM_EVENT_STA_CONNECTED:
      break;
    case SYSTEM_EVENT_STA_GOT_IP:
      periph_wifi->wifi_state = PERIPH_WIFI_CONNECTED;
      xEventGroupClearBits (periph_wifi->state_event, DISCONNECTED_BIT);
      esp_periph_send_event (self, PERIPH_WIFI_CONNECTED, NULL, 0);
      xEventGroupSetBits (periph_wifi->state_event, CONNECTED_BIT);
      wifi_config_t w_config;
      memset (&w_config, 0x00, sizeof (wifi_config_t));
      esp_wifi_get_config (WIFI_IF_STA, &w_config);
      strcpy (periph_wifi->ssid, (char *)w_config.sta.ssid);
      break;
    case SYSTEM_EVENT_STA_DISCONNECTED:
      periph_wifi->wifi_state = PERIPH_WIFI_DISCONNECTED;
      xEventGroupClearBits (periph_wifi->state_event, CONNECTED_BIT);
      xEventGroupSetBits (periph_wifi->state_event, DISCONNECTED_BIT);
      esp_periph_send_event (self, PERIPH_WIFI_DISCONNECTED, NULL, 0);

      ESP_LOGW (TAG,
                "Wi-Fi disconnected from SSID %s, auto-reconnect %s, "
                "reconnect after %d ms",
                periph_wifi->ssid,
                periph_wifi->disable_auto_reconnect == 0 ? "enabled"
                                                         : "disabled",
                periph_wifi->reconnect_timeout_ms);
      if (periph_wifi->disable_auto_reconnect)
        {
          break;
        }
      esp_periph_start_timer (
          self, periph_wifi->reconnect_timeout_ms / portTICK_RATE_MS,
          wifi_reconnect_timer);
      break;
    default:
      break;
    }
  return ESP_OK;
}
#endif

static esp_err_t
_wifi_run (esp_periph_handle_t self, audio_event_iface_msg_t *msg)
{
  esp_periph_send_event (self, msg->cmd, NULL, 0);
  return ESP_OK;
}

static esp_err_t
_wifi_init (esp_periph_handle_t self)
{
  periph_wifi_handle_t periph_wifi
      = (periph_wifi_handle_t)esp_periph_get_data (self);
  wifi_config_t wifi_config;

  if (periph_wifi->is_open)
    {
      ESP_LOGE (TAG, "Wifi has initialized");
      return ESP_FAIL;
    }
#if (ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(4, 0, 0))
  ESP_ERROR_CHECK (esp_event_loop_create_default ());
#if (ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(4, 1, 0))
  esp_netif_create_default_wifi_sta ();
#endif
  ESP_ERROR_CHECK (esp_event_handler_register (WIFI_EVENT, ESP_EVENT_ANY_ID,
                                               &_wifi_event_callback, self));
  ESP_ERROR_CHECK (esp_event_handler_register (IP_EVENT, IP_EVENT_STA_GOT_IP,
                                               &_wifi_event_callback, self));
#else
#include "esp_event_loop.h"
  if (esp_event_loop_get_queue () == NULL)
    {
      ESP_ERROR_CHECK (esp_event_loop_init (_wifi_event_callback, self));
    }
  else
    {
      esp_event_loop_set_cb (_wifi_event_callback, self);
    }
#endif

  wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT ();
  ESP_ERROR_CHECK (esp_wifi_init (&cfg));

  memset (&wifi_config, 0x00, sizeof (wifi_config_t));
  if (periph_wifi->ssid)
    {
      strcpy ((char *)wifi_config.sta.ssid, periph_wifi->ssid);
      ESP_LOGD (TAG, "WIFI_SSID=%s", wifi_config.sta.ssid);
      if (periph_wifi->password)
        {
          strcpy ((char *)wifi_config.sta.password, periph_wifi->password);
          ESP_LOGD (TAG, "WIFI_PASS=%s", wifi_config.sta.password);
        }
      ESP_ERROR_CHECK (esp_wifi_set_storage (WIFI_STORAGE_RAM));
      ESP_ERROR_CHECK (esp_wifi_set_mode (WIFI_MODE_STA));
      ESP_ERROR_CHECK (esp_wifi_set_config (WIFI_IF_STA, &wifi_config));
    }
  if (periph_wifi->wpa2_e_cfg->diasble_wpa2_e)
    {
      unsigned int ca_pem_bytes = periph_wifi->wpa2_e_cfg->ca_pem_end
                                  - periph_wifi->wpa2_e_cfg->ca_pem_start;
      unsigned int client_crt_bytes
          = periph_wifi->wpa2_e_cfg->wpa2_e_cert_end
            - periph_wifi->wpa2_e_cfg->wpa2_e_cert_start;
      unsigned int client_key_bytes
          = periph_wifi->wpa2_e_cfg->wpa2_e_key_end
            - periph_wifi->wpa2_e_cfg->wpa2_e_key_start;

      ESP_ERROR_CHECK (esp_wifi_sta_wpa2_ent_set_ca_cert (
          (const unsigned char *)periph_wifi->wpa2_e_cfg->ca_pem_start,
          ca_pem_bytes));
      ESP_ERROR_CHECK (esp_wifi_sta_wpa2_ent_set_cert_key (
          (const unsigned char *)periph_wifi->wpa2_e_cfg->wpa2_e_cert_start,
          client_crt_bytes,
          (const unsigned char *)periph_wifi->wpa2_e_cfg->wpa2_e_key_start,
          client_key_bytes, NULL, 0));
      ESP_ERROR_CHECK (esp_wifi_sta_wpa2_ent_set_identity (
          (uint8_t *)periph_wifi->wpa2_e_cfg->eap_id,
          strlen (periph_wifi->wpa2_e_cfg->eap_id)));
      if (periph_wifi->wpa2_e_cfg->eap_method == EAP_PEAP
          || periph_wifi->wpa2_e_cfg->eap_method == EAP_TTLS)
        {
          ESP_ERROR_CHECK (esp_wifi_sta_wpa2_ent_set_username (
              (uint8_t *)periph_wifi->wpa2_e_cfg->eap_username,
              strlen (periph_wifi->wpa2_e_cfg->eap_username)));
          ESP_ERROR_CHECK (esp_wifi_sta_wpa2_ent_set_password (
              (uint8_t *)periph_wifi->wpa2_e_cfg->eap_password,
              strlen (periph_wifi->wpa2_e_cfg->eap_password)));
        }

#if (ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(4, 0, 0))
      ESP_ERROR_CHECK (esp_wifi_sta_wpa2_ent_enable ());
#else
      esp_wpa2_config_t wpa2_config = WPA2_CONFIG_INIT_DEFAULT ();
      ESP_ERROR_CHECK (esp_wifi_sta_wpa2_ent_enable (&wpa2_config));
#endif
    }

  ESP_ERROR_CHECK (esp_wifi_start ());
  periph_wifi->is_open = true;
  periph_wifi->wifi_state = PERIPH_WIFI_DISCONNECTED;
  xEventGroupClearBits (periph_wifi->state_event, CONNECTED_BIT);
  xEventGroupSetBits (periph_wifi->state_event, DISCONNECTED_BIT);
  return ESP_OK;
}

static esp_err_t
_wifi_destroy (esp_periph_handle_t self)
{
  periph_wifi_handle_t periph_wifi
      = (periph_wifi_handle_t)esp_periph_get_data (self);
  esp_periph_stop_timer (self);
  periph_wifi->disable_auto_reconnect = true;
  esp_wifi_disconnect ();
  periph_wifi_wait_for_disconnected (self, portMAX_DELAY);
  esp_wifi_stop ();
  esp_wifi_deinit ();
  audio_free (periph_wifi->ssid);
  audio_free (periph_wifi->password);

  vEventGroupDelete (periph_wifi->state_event);
  if (periph_wifi->wpa2_e_cfg != NULL)
    {
      audio_free (periph_wifi->wpa2_e_cfg);
      periph_wifi->wpa2_e_cfg = NULL;
    }
  audio_free (periph_wifi);
  g_periph = NULL;
  return ESP_OK;
}

esp_periph_handle_t
periph_wifi_init (periph_wifi_cfg_t *config)
{
  esp_periph_handle_t periph = NULL;
  periph_wifi_handle_t periph_wifi = NULL;
  bool _success
      = ((periph = esp_periph_create (PERIPH_ID_WIFI, "periph_wifi"))
         && (periph_wifi = audio_calloc (1, sizeof (struct periph_wifi)))
         && (periph_wifi->state_event = xEventGroupCreate ())
         && (config->ssid
                 ? (bool)(periph_wifi->ssid = audio_strdup (config->ssid))
                 : true)
         && (config->password ? (bool)(periph_wifi->password
                                       = audio_strdup (config->password))
                              : true));

  AUDIO_MEM_CHECK (TAG, _success, goto _periph_wifi_init_failed);

  periph_wifi->reconnect_timeout_ms = config->reconnect_timeout_ms;
  if (periph_wifi->reconnect_timeout_ms == 0)
    {
      periph_wifi->reconnect_timeout_ms = DEFAULT_RECONNECT_TIMEOUT_MS;
    }
  periph_wifi->disable_auto_reconnect = config->disable_auto_reconnect;

  periph_wifi->wpa2_e_cfg
      = audio_malloc (sizeof (periph_wpa2_enterprise_cfg_t));
  AUDIO_NULL_CHECK (TAG, periph_wifi->wpa2_e_cfg, {
    audio_free (periph);
    goto _periph_wifi_init_failed;
  });
  memcpy (periph_wifi->wpa2_e_cfg, &config->wpa2_e_cfg,
          sizeof (periph_wpa2_enterprise_cfg_t));

  esp_periph_set_data (periph, periph_wifi);
  esp_periph_set_function (periph, _wifi_init, _wifi_run, _wifi_destroy);
  g_periph = periph;
  return periph;

_periph_wifi_init_failed:
  if (periph_wifi)
    {
      vEventGroupDelete (periph_wifi->state_event);
      audio_free (periph_wifi->ssid);
      audio_free (periph_wifi->password);
      audio_free (periph_wifi);
    }
  return NULL;
}