152 lines
6 KiB
C
152 lines
6 KiB
C
/* WiFi Connection Example using WPA2 Enterprise
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*
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* Original Copyright (C) 2006-2016, ARM Limited, All Rights Reserved, Apache 2.0 License.
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* Additions Copyright (C) Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD, Apache 2.0 License.
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*
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <string.h>
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#include <stdlib.h>
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#include "freertos/FreeRTOS.h"
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#include "freertos/task.h"
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#include "freertos/event_groups.h"
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#include "esp_wifi.h"
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#include "esp_wpa2.h"
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#include "esp_event.h"
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#include "esp_log.h"
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#include "esp_system.h"
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#include "nvs_flash.h"
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#include "tcpip_adapter.h"
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/* The examples use simple WiFi configuration that you can set via
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'make menuconfig'.
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If you'd rather not, just change the below entries to strings with
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the config you want - ie #define EXAMPLE_WIFI_SSID "mywifissid"
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You can choose EAP method via 'make menuconfig' according to the
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configuration of AP.
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*/
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#define EXAMPLE_WIFI_SSID CONFIG_WIFI_SSID
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#define EXAMPLE_EAP_METHOD CONFIG_EAP_METHOD
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#define EXAMPLE_EAP_ID CONFIG_EAP_ID
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#define EXAMPLE_EAP_USERNAME CONFIG_EAP_USERNAME
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#define EXAMPLE_EAP_PASSWORD CONFIG_EAP_PASSWORD
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/* FreeRTOS event group to signal when we are connected & ready to make a request */
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static EventGroupHandle_t wifi_event_group;
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/* The event group allows multiple bits for each event,
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but we only care about one event - are we connected
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to the AP with an IP? */
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const int CONNECTED_BIT = BIT0;
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/* Constants that aren't configurable in menuconfig */
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#define EAP_PEAP 1
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#define EAP_TTLS 2
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static const char *TAG = "example";
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/* CA cert, taken from wpa2_ca.pem
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Client cert, taken from wpa2_client.crt
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Client key, taken from wpa2_client.key
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The PEM, CRT and KEY file were provided by the person or organization
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who configured the AP with wpa2 enterprise.
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To embed it in the app binary, the PEM, CRT and KEY file is named
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in the component.mk COMPONENT_EMBED_TXTFILES variable.
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*/
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extern uint8_t ca_pem_start[] asm("_binary_wpa2_ca_pem_start");
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extern uint8_t ca_pem_end[] asm("_binary_wpa2_ca_pem_end");
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extern uint8_t client_crt_start[] asm("_binary_wpa2_client_crt_start");
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extern uint8_t client_crt_end[] asm("_binary_wpa2_client_crt_end");
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extern uint8_t client_key_start[] asm("_binary_wpa2_client_key_start");
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extern uint8_t client_key_end[] asm("_binary_wpa2_client_key_end");
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static void 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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{
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if (event_base == WIFI_EVENT && event_id == WIFI_EVENT_STA_START) {
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esp_wifi_connect();
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} else if (event_base == WIFI_EVENT && event_id == WIFI_EVENT_STA_DISCONNECTED) {
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esp_wifi_connect();
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xEventGroupClearBits(wifi_event_group, CONNECTED_BIT);
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} else if (event_base == IP_EVENT && event_id == IP_EVENT_STA_GOT_IP) {
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xEventGroupSetBits(wifi_event_group, CONNECTED_BIT);
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}
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}
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static void initialise_wifi(void)
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{
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unsigned int ca_pem_bytes = ca_pem_end - ca_pem_start;
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unsigned int client_crt_bytes = client_crt_end - client_crt_start;
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unsigned int client_key_bytes = client_key_end - client_key_start;
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esp_wpa2_config_t config = WPA2_CONFIG_INIT_DEFAULT();
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tcpip_adapter_init();
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wifi_event_group = xEventGroupCreate();
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ESP_ERROR_CHECK(esp_event_loop_create_default());
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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_event_handler_register(WIFI_EVENT, ESP_EVENT_ANY_ID, &event_handler, NULL) );
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ESP_ERROR_CHECK( esp_event_handler_register(IP_EVENT, IP_EVENT_STA_GOT_IP, &event_handler, NULL) );
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ESP_ERROR_CHECK( esp_wifi_set_storage(WIFI_STORAGE_RAM) );
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wifi_config_t wifi_config = {
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.sta = {
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.ssid = EXAMPLE_WIFI_SSID,
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},
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};
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ESP_LOGI(TAG, "Setting WiFi configuration SSID %s...", wifi_config.sta.ssid);
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ESP_ERROR_CHECK( esp_wifi_set_mode(WIFI_MODE_STA) );
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ESP_ERROR_CHECK( esp_wifi_set_config(ESP_IF_WIFI_STA, &wifi_config) );
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ESP_ERROR_CHECK( esp_wifi_sta_wpa2_ent_set_ca_cert(ca_pem_start, ca_pem_bytes) );
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ESP_ERROR_CHECK( esp_wifi_sta_wpa2_ent_set_cert_key(client_crt_start, client_crt_bytes,\
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client_key_start, client_key_bytes, NULL, 0) );
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ESP_ERROR_CHECK( esp_wifi_sta_wpa2_ent_set_identity((uint8_t *)EXAMPLE_EAP_ID, strlen(EXAMPLE_EAP_ID)) );
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if (EXAMPLE_EAP_METHOD == EAP_PEAP || EXAMPLE_EAP_METHOD == EAP_TTLS) {
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ESP_ERROR_CHECK( esp_wifi_sta_wpa2_ent_set_username((uint8_t *)EXAMPLE_EAP_USERNAME, strlen(EXAMPLE_EAP_USERNAME)) );
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ESP_ERROR_CHECK( esp_wifi_sta_wpa2_ent_set_password((uint8_t *)EXAMPLE_EAP_PASSWORD, strlen(EXAMPLE_EAP_PASSWORD)) );
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}
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ESP_ERROR_CHECK( esp_wifi_sta_wpa2_ent_enable(&config) );
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ESP_ERROR_CHECK( esp_wifi_start() );
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}
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static void wpa2_enterprise_example_task(void *pvParameters)
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{
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tcpip_adapter_ip_info_t ip;
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memset(&ip, 0, sizeof(tcpip_adapter_ip_info_t));
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vTaskDelay(2000 / portTICK_PERIOD_MS);
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while (1) {
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vTaskDelay(2000 / portTICK_PERIOD_MS);
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if (tcpip_adapter_get_ip_info(ESP_IF_WIFI_STA, &ip) == 0) {
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ESP_LOGI(TAG, "~~~~~~~~~~~");
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ESP_LOGI(TAG, "IP:"IPSTR, IP2STR(&ip.ip));
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ESP_LOGI(TAG, "MASK:"IPSTR, IP2STR(&ip.netmask));
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ESP_LOGI(TAG, "GW:"IPSTR, IP2STR(&ip.gw));
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ESP_LOGI(TAG, "~~~~~~~~~~~");
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}
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}
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}
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void app_main()
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{
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ESP_ERROR_CHECK( nvs_flash_init() );
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initialise_wifi();
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xTaskCreate(&wpa2_enterprise_example_task, "wpa2_enterprise_example_task", 4096, NULL, 5, NULL);
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}
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