221 lines
7.6 KiB
C
221 lines
7.6 KiB
C
/*
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* SPDX-FileCopyrightText: 2023-2024 Espressif Systems (Shanghai) CO LTD
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*
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* SPDX-License-Identifier: Unlicense OR CC0-1.0
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*/
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/* WiFi softAP & station Example
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This example code is in the Public Domain (or CC0 licensed, at your option.)
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Unless required by applicable law or agreed to in writing, this
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software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
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CONDITIONS OF ANY KIND, either express or implied.
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*/
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#include "esp_event.h"
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#include "esp_log.h"
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#include "esp_mac.h"
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#include "esp_netif.h"
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#include "esp_netif_net_stack.h"
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#include "esp_netif_types.h"
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#include "esp_wifi.h"
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#include "lwip/inet.h"
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#include "lwip/ip4_addr.h"
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#include "lwip/netdb.h"
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#include "lwip/sockets.h"
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#include "nvs_flash.h"
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#include <network.h>
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#include <string.h>
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#if IP_NAPT
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#include "lwip/lwip_napt.h"
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#endif
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#include "lwip/err.h"
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#include "lwip/sys.h"
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static const char *TAG_AP = "WiFi SoftAP";
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static const char *TAG_STA = "WiFi Sta";
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static int s_retry_num = 0;
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/* FreeRTOS event group to signal when we are connected/disconnected */
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EventGroupHandle_t s_wifi_event_group;
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static void wifi_event_handler(void *arg, esp_event_base_t event_base,
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int32_t event_id, void *event_data) {
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if (event_base == WIFI_EVENT && event_id == WIFI_EVENT_AP_STACONNECTED) {
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wifi_event_ap_staconnected_t *event =
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(wifi_event_ap_staconnected_t *)event_data;
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ESP_LOGI(TAG_AP, "Station " MACSTR " joined, AID=%d", MAC2STR(event->mac),
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event->aid);
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} else if (event_base == WIFI_EVENT &&
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event_id == WIFI_EVENT_AP_STADISCONNECTED) {
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wifi_event_ap_stadisconnected_t *event =
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(wifi_event_ap_stadisconnected_t *)event_data;
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ESP_LOGI(TAG_AP, "Station " MACSTR " left, AID=%d, reason:%d",
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MAC2STR(event->mac), event->aid, event->reason);
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} else if (event_base == WIFI_EVENT && event_id == WIFI_EVENT_STA_START) {
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esp_wifi_connect();
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ESP_LOGI(TAG_STA, "Station started");
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} else if (event_base == IP_EVENT && event_id == IP_EVENT_STA_GOT_IP) {
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ip_event_got_ip_t *event = (ip_event_got_ip_t *)event_data;
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ESP_LOGI(TAG_STA, "Got IP:" IPSTR, IP2STR(&event->ip_info.ip));
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s_retry_num = 0;
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xEventGroupSetBits(s_wifi_event_group, WIFI_CONNECTED_BIT);
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}
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}
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/* Initialize soft AP */
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esp_netif_t *wifi_init_softap(void) {
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esp_netif_t *esp_netif_ap = esp_netif_create_default_wifi_ap();
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wifi_config_t wifi_ap_config = {
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.ap =
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{
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.ssid = EXAMPLE_ESP_WIFI_AP_SSID,
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.ssid_len = strlen(EXAMPLE_ESP_WIFI_AP_SSID),
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.channel = EXAMPLE_ESP_WIFI_CHANNEL,
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.password = EXAMPLE_ESP_WIFI_AP_PASSWD,
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.max_connection = EXAMPLE_MAX_STA_CONN,
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.authmode = WIFI_AUTH_WPA2_PSK,
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.pmf_cfg =
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{
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.required = false,
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},
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},
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};
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if (strlen(EXAMPLE_ESP_WIFI_AP_PASSWD) == 0) {
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wifi_ap_config.ap.authmode = WIFI_AUTH_OPEN;
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}
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ESP_ERROR_CHECK(esp_wifi_set_config(WIFI_IF_AP, &wifi_ap_config));
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esp_netif_dhcps_stop(esp_netif_ap);
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ESP_LOGI(TAG_AP, "wifi_init_softap finished. SSID:%s password:%s channel:%d",
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EXAMPLE_ESP_WIFI_AP_SSID, EXAMPLE_ESP_WIFI_AP_PASSWD,
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EXAMPLE_ESP_WIFI_CHANNEL);
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esp_netif_ip_info_t ipinfo;
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IP4_ADDR(&ipinfo.ip, 172, 16, 0, 1);
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IP4_ADDR(&ipinfo.gw, 172, 16, 0, 1);
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IP4_ADDR(&ipinfo.netmask, 255, 255, 255, 0);
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esp_netif_set_ip_info(esp_netif_ap, &ipinfo);
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esp_netif_dhcps_start(esp_netif_ap);
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return esp_netif_ap;
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}
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/* Initialize wifi station */
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esp_netif_t *wifi_init_sta(void) {
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esp_netif_t *esp_netif_sta = esp_netif_create_default_wifi_sta();
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wifi_config_t wifi_sta_config = {
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.sta =
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{
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.ssid = EXAMPLE_ESP_WIFI_STA_SSID,
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.password = EXAMPLE_ESP_WIFI_STA_PASSWD,
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.scan_method = WIFI_ALL_CHANNEL_SCAN,
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.failure_retry_cnt = EXAMPLE_ESP_MAXIMUM_RETRY,
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/* Authmode threshold resets to WPA2 as default if password
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* matches WPA2 standards (password len => 8). If you want to
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* connect the device to deprecated WEP/WPA networks, Please set
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* the threshold value to WIFI_AUTH_WEP/WIFI_AUTH_WPA_PSK and set
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* the password with length and format matching to
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* WIFI_AUTH_WEP/WIFI_AUTH_WPA_PSK standards.
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*/
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.threshold.authmode = ESP_WIFI_SCAN_AUTH_MODE_THRESHOLD,
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.sae_pwe_h2e = WPA3_SAE_PWE_BOTH,
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},
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};
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ESP_ERROR_CHECK(esp_wifi_set_config(WIFI_IF_STA, &wifi_sta_config));
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ESP_LOGI(TAG_STA, "wifi_init_sta finished.");
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return esp_netif_sta;
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}
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void softap_set_dns_addr(esp_netif_t *esp_netif_ap,
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esp_netif_t *esp_netif_sta) {
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esp_netif_dns_info_t dns;
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esp_netif_get_dns_info(esp_netif_sta, ESP_NETIF_DNS_MAIN, &dns);
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uint8_t dhcps_offer_option = DHCPS_OFFER_DNS;
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ESP_ERROR_CHECK_WITHOUT_ABORT(esp_netif_dhcps_stop(esp_netif_ap));
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ESP_ERROR_CHECK(esp_netif_dhcps_option(
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esp_netif_ap, ESP_NETIF_OP_SET, ESP_NETIF_DOMAIN_NAME_SERVER,
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&dhcps_offer_option, sizeof(dhcps_offer_option)));
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ESP_ERROR_CHECK(
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esp_netif_set_dns_info(esp_netif_ap, ESP_NETIF_DNS_MAIN, &dns));
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ESP_ERROR_CHECK_WITHOUT_ABORT(esp_netif_dhcps_start(esp_netif_ap));
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}
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void netif_start(void) {
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ESP_ERROR_CHECK(esp_netif_init());
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ESP_ERROR_CHECK(esp_event_loop_create_default());
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// Initialize NVS
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esp_err_t ret = nvs_flash_init();
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if (ret == ESP_ERR_NVS_NO_FREE_PAGES ||
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ret == ESP_ERR_NVS_NEW_VERSION_FOUND) {
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ESP_ERROR_CHECK(nvs_flash_erase());
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ret = nvs_flash_init();
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}
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ESP_ERROR_CHECK(ret);
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/* Initialize event group */
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s_wifi_event_group = xEventGroupCreate();
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/* Register Event handler */
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ESP_ERROR_CHECK(esp_event_handler_instance_register(
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WIFI_EVENT, ESP_EVENT_ANY_ID, &wifi_event_handler, NULL, NULL));
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ESP_ERROR_CHECK(esp_event_handler_instance_register(
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IP_EVENT, IP_EVENT_STA_GOT_IP, &wifi_event_handler, NULL, NULL));
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/*Initialize WiFi */
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wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();
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ESP_ERROR_CHECK(esp_wifi_init(&cfg));
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ESP_ERROR_CHECK(esp_wifi_set_mode(WIFI_MODE_APSTA));
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/* Initialize AP */
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ESP_LOGI(TAG_AP, "ESP_WIFI_MODE_AP");
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esp_netif_t *esp_netif_ap = wifi_init_softap();
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/* Initialize STA */
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ESP_LOGI(TAG_STA, "ESP_WIFI_MODE_STA");
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esp_netif_t *esp_netif_sta = wifi_init_sta();
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/* Start WiFi */
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ESP_ERROR_CHECK(esp_wifi_start());
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/*
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* Wait until either the connection is established (WIFI_CONNECTED_BIT) or
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* connection failed for the maximum number of re-tries (WIFI_FAIL_BIT).
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* The bits are set by event_handler() (see above)
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*/
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EventBits_t bits = xEventGroupWaitBits(s_wifi_event_group,
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WIFI_CONNECTED_BIT | WIFI_FAIL_BIT,
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pdFALSE, pdFALSE, portMAX_DELAY);
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/* xEventGroupWaitBits() returns the bits before the call returned,
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* hence we can test which event actually happened. */
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if (bits & WIFI_CONNECTED_BIT) {
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ESP_LOGI(TAG_STA, "connected to ap SSID:%s password:%s",
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EXAMPLE_ESP_WIFI_STA_SSID, EXAMPLE_ESP_WIFI_STA_PASSWD);
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softap_set_dns_addr(esp_netif_ap, esp_netif_sta);
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} else if (bits & WIFI_FAIL_BIT) {
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ESP_LOGI(TAG_STA, "Failed to connect to SSID:%s, password:%s",
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EXAMPLE_ESP_WIFI_STA_SSID, EXAMPLE_ESP_WIFI_STA_PASSWD);
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} else {
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ESP_LOGE(TAG_STA, "UNEXPECTED EVENT");
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return;
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}
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/* Set sta as the default interface */
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esp_netif_set_default_netif(esp_netif_sta);
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/* Enable napt on the AP netif */
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if (esp_netif_napt_enable(esp_netif_ap) != ESP_OK) {
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ESP_LOGE(TAG_STA, "NAPT not enabled on the netif: %p", esp_netif_ap);
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}
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}
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