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wolfssl-w32/IDE/Espressif/ESP-IDF/examples/wolfssl_server/main/wifi_connect.c

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/* wifi_connect.c
*
* Copyright (C) 2006-2023 wolfSSL Inc.
*
* This file is part of wolfSSL.
*
* wolfSSL is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* wolfSSL is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
*/
#include "wifi_connect.h"
#include <freertos/FreeRTOS.h>
#include <freertos/task.h>
#include <freertos/event_groups.h>
#include <esp_wifi.h>
#include <esp_log.h>
/* wolfSSL */
#include <wolfssl/wolfcrypt/settings.h>
#include <wolfssl/version.h>
#include <wolfssl/wolfcrypt/types.h>
#ifndef WOLFSSL_ESPIDF
#warning "Problem with wolfSSL user_settings."
#warning "Check components/wolfssl/include"
#endif
#if ESP_IDF_VERSION_MAJOR >= 5
#elif ESP_IDF_VERSION_MAJOR >= 4
#include "protocol_examples_common.h"
#else
const static int CONNECTED_BIT = BIT0;
static EventGroupHandle_t wifi_event_group;
#endif
#if defined(ESP_IDF_VERSION_MAJOR) && defined(ESP_IDF_VERSION_MINOR)
#if ESP_IDF_VERSION_MAJOR >= 4
/* likely using examples, see wifi_connect.h */
#else
/* TODO - still supporting pre V4 ? */
const static int CONNECTED_BIT = BIT0;
static EventGroupHandle_t wifi_event_group;
#endif
#if (ESP_IDF_VERSION_MAJOR == 5)
#define HAS_WPA3_FEATURES
#else
#undef HAS_WPA3_FEATURES
#endif
#else
/* TODO Consider pre IDF v5? */
#endif
/* breadcrumb prefix for logging */
const static char *TAG = "wifi_connect";
#if ESP_IDF_VERSION_MAJOR < 4
/* event handler for wifi events */
static esp_err_t wifi_event_handler(void *ctx, system_event_t *event)
{
switch (event->event_id)
{
case SYSTEM_EVENT_STA_START:
esp_wifi_connect();
break;
case SYSTEM_EVENT_STA_GOT_IP:
#if ESP_IDF_VERSION_MAJOR >= 4
ESP_LOGI(TAG, "got ip:" IPSTR "\n",
IP2STR(&event->event_info.got_ip.ip_info.ip));
#else
ESP_LOGI(TAG, "got ip:%s",
ip4addr_ntoa(&event->event_info.got_ip.ip_info.ip));
#endif
/* see https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-reference/system/freertos_idf.html */
xEventGroupSetBits(wifi_event_group, CONNECTED_BIT);
break;
case SYSTEM_EVENT_STA_DISCONNECTED:
esp_wifi_connect();
xEventGroupClearBits(wifi_event_group, CONNECTED_BIT);
break;
default:
break;
}
return ESP_OK;
}
#else
#ifdef CONFIG_ESP_MAXIMUM_RETRY
#define EXAMPLE_ESP_MAXIMUM_RETRY CONFIG_ESP_MAXIMUM_RETRY
#else
#define CONFIG_ESP_MAXIMUM_RETRY 5
#endif
#if CONFIG_ESP_WIFI_AUTH_OPEN
#define ESP_WIFI_SCAN_AUTH_MODE_THRESHOLD WIFI_AUTH_OPEN
#elif CONFIG_ESP_WIFI_AUTH_WEP
#define ESP_WIFI_SCAN_AUTH_MODE_THRESHOLD WIFI_AUTH_WEP
#elif CONFIG_ESP_WIFI_AUTH_WPA_PSK
#define ESP_WIFI_SCAN_AUTH_MODE_THRESHOLD WIFI_AUTH_WPA_PSK
#elif CONFIG_ESP_WIFI_AUTH_WPA2_PSK
#define ESP_WIFI_SCAN_AUTH_MODE_THRESHOLD WIFI_AUTH_WPA2_PSK
#elif CONFIG_ESP_WIFI_AUTH_WPA_WPA2_PSK
#define ESP_WIFI_SCAN_AUTH_MODE_THRESHOLD WIFI_AUTH_WPA_WPA2_PSK
#elif CONFIG_ESP_WIFI_AUTH_WPA3_PSK
#define ESP_WIFI_SCAN_AUTH_MODE_THRESHOLD WIFI_AUTH_WPA3_PSK
#elif CONFIG_ESP_WIFI_AUTH_WPA2_WPA3_PSK
#define ESP_WIFI_SCAN_AUTH_MODE_THRESHOLD WIFI_AUTH_WPA2_WPA3_PSK
#elif CONFIG_ESP_WIFI_AUTH_WAPI_PSK
#define ESP_WIFI_SCAN_AUTH_MODE_THRESHOLD WIFI_AUTH_WAPI_PSK
#endif
#ifndef ESP_WIFI_SCAN_AUTH_MODE_THRESHOLD
#define CONFIG_ESP_WIFI_AUTH_WPA2_PSK 1
#define ESP_WIFI_SCAN_AUTH_MODE_THRESHOLD CONFIG_ESP_WIFI_AUTH_WPA2_PSK
#endif
/* FreeRTOS event group to signal when we are connected*/
static EventGroupHandle_t s_wifi_event_group;
/* The event group allows multiple bits for each event, but we only care about two events:
* - we are connected to the AP with an IP
* - we failed to connect after the maximum amount of retries */
#define WIFI_CONNECTED_BIT BIT0
#define WIFI_FAIL_BIT BIT1
static int s_retry_num = 0;
ip_event_got_ip_t* event;
static void event_handler(void* arg,
esp_event_base_t event_base,
int32_t event_id,
void* event_data)
{
if (event_base == WIFI_EVENT && event_id == WIFI_EVENT_STA_START) {
esp_wifi_connect();
}
else if (event_base == WIFI_EVENT &&
event_id == WIFI_EVENT_STA_DISCONNECTED) {
if (s_retry_num < EXAMPLE_ESP_MAXIMUM_RETRY) {
esp_wifi_connect();
s_retry_num++;
ESP_LOGI(TAG, "retry to connect to the AP");
}
else {
xEventGroupSetBits(s_wifi_event_group, WIFI_FAIL_BIT);
}
ESP_LOGI(TAG, "connect to the AP fail");
}
else if (event_base == IP_EVENT && event_id == IP_EVENT_STA_GOT_IP) {
event = (ip_event_got_ip_t*) event_data;
wifi_show_ip();
s_retry_num = 0;
xEventGroupSetBits(s_wifi_event_group, WIFI_CONNECTED_BIT);
}
}
int wifi_init_sta(void)
{
int ret = ESP_OK;
s_wifi_event_group = xEventGroupCreate();
ESP_ERROR_CHECK(esp_netif_init());
ESP_ERROR_CHECK(esp_event_loop_create_default());
esp_netif_create_default_wifi_sta();
wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();
ESP_ERROR_CHECK(esp_wifi_init(&cfg));
esp_event_handler_instance_t instance_any_id;
esp_event_handler_instance_t instance_got_ip;
ESP_ERROR_CHECK(esp_event_handler_instance_register(WIFI_EVENT,
ESP_EVENT_ANY_ID,
&event_handler,
NULL,
&instance_any_id));
ESP_ERROR_CHECK(esp_event_handler_instance_register(IP_EVENT,
IP_EVENT_STA_GOT_IP,
&event_handler,
NULL,
&instance_got_ip));
wifi_config_t wifi_config = {
.sta = {
.ssid = EXAMPLE_ESP_WIFI_SSID,
.password = EXAMPLE_ESP_WIFI_PASS,
/* Authmode threshold resets to WPA2 as default if password matches
* WPA2 standards (pasword len => 8). If you want to connect the
* device to deprecated WEP/WPA networks, Please set the threshold
* value WIFI_AUTH_WEP/WIFI_AUTH_WPA_PSK and set the password with
* length and format matching to WIFI_AUTH_WEP/WIFI_AUTH_WPA_PSK
* standards. */
.threshold.authmode = ESP_WIFI_SCAN_AUTH_MODE_THRESHOLD,
#ifdef HAS_WPA3_FEATURES
.sae_pwe_h2e = WPA3_SAE_PWE_BOTH,
#endif
},
};
ESP_ERROR_CHECK(esp_wifi_set_mode(WIFI_MODE_STA) );
ESP_ERROR_CHECK(esp_wifi_set_config(WIFI_IF_STA, &wifi_config) );
#ifdef CONFIG_EXAMPLE_WIFI_SSID
if (XSTRCMP(CONFIG_EXAMPLE_WIFI_SSID, "myssid") == 0) {
ESP_LOGW(TAG, "WARNING: CONFIG_EXAMPLE_WIFI_SSID is \"myssid\".");
ESP_LOGW(TAG, " Do you have a WiFi AP called \"myssid\", ");
ESP_LOGW(TAG, " or did you forget the ESP-IDF configuration?");
}
#else
ESP_LOGW(TAG, "WARNING: CONFIG_EXAMPLE_WIFI_SSID not defined.");
#endif
ESP_ERROR_CHECK(esp_wifi_start() );
ESP_LOGI(TAG, "wifi_init_sta finished.");
/* Waiting until either the connection is established (WIFI_CONNECTED_BIT)
* or connection failed for the maximum number of re-tries (WIFI_FAIL_BIT).
* The bits are set by event_handler() (see above) */
EventBits_t bits = xEventGroupWaitBits(s_wifi_event_group,
WIFI_CONNECTED_BIT | WIFI_FAIL_BIT,
pdFALSE,
pdFALSE,
portMAX_DELAY);
/* xEventGroupWaitBits() returns the bits before the call returned,
* hence we can test which event actually happened. */
#if defined(SHOW_SSID_AND_PASSWORD)
ESP_LOGW(TAG, "Undefine SHOW_SSID_AND_PASSWORD to not show SSID/password");
if (bits & WIFI_CONNECTED_BIT) {
ESP_LOGI(TAG, "connected to ap SSID:%s password:%s",
EXAMPLE_ESP_WIFI_SSID,
EXAMPLE_ESP_WIFI_PASS);
}
else if (bits & WIFI_FAIL_BIT) {
ESP_LOGI(TAG, "Failed to connect to SSID:%s, password:%s",
EXAMPLE_ESP_WIFI_SSID,
EXAMPLE_ESP_WIFI_PASS);
}
else {
ESP_LOGE(TAG, "UNEXPECTED EVENT");
}
#else
if (bits & WIFI_CONNECTED_BIT) {
ESP_LOGI(TAG, "Connected to AP");
}
else if (bits & WIFI_FAIL_BIT) {
ESP_LOGI(TAG, "Failed to connect to AP");
ret = -1;
}
else {
ESP_LOGE(TAG, "AP UNEXPECTED EVENT");
ret = -2;
}
#endif
return ret;
}
int wifi_show_ip(void)
{
/* ESP_LOGI(TAG, "got ip:" IPSTR, IP2STR(&event->ip_info.ip)); */
return 0;
}
#endif
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