mch2022-template-app/main/wifi_connect.c
2022-06-01 18:29:44 +02:00

104 lines
3 KiB
C

#include <stdio.h>
#include <string.h>
#include <sdkconfig.h>
#include <freertos/FreeRTOS.h>
#include <freertos/task.h>
#include <freertos/queue.h>
#include <esp_system.h>
#include <esp_err.h>
#include <esp_log.h>
#include <nvs_flash.h>
#include <nvs.h>
#include "pax_gfx.h"
#include "system_wrapper.h"
#include "settings.h"
#include "wifi_connection.h"
static const char *TAG = "wifi_connect";
bool wifi_connect_to_stored() {
bool result = false;
// Open NVS.
nvs_handle_t handle;
nvs_open("system", NVS_READWRITE, &handle);
wifi_auth_mode_t authmode = 0;
esp_eap_ttls_phase2_types phase2 = 0;
char *ssid = NULL;
char *ident = NULL;
char *anon_ident = NULL;
char *password = NULL;
size_t len;
// Read NVS.
esp_err_t res;
// Read SSID.
res = nvs_get_str(handle, "wifi.ssid", NULL, &len);
if (res) goto errcheck;
ssid = malloc(len);
res = nvs_get_str(handle, "wifi.ssid", ssid, &len);
if (res) goto errcheck;
// Check whether connection is enterprise.
res = nvs_get_u8(handle, "wifi.authmode", &authmode);
bool use_ent = authmode == WIFI_AUTH_WPA2_ENTERPRISE;
if (res) goto errcheck;
if (use_ent) {
// Read enterprise-specific parameters.
// Read phase2 mode.
res = nvs_get_u8(handle, "wifi.phase2", &phase2);
if (res) goto errcheck;
// Read identity.
res = nvs_get_str(handle, "wifi.username", NULL, &len);
if (res) goto errcheck;
ident = malloc(len);
res = nvs_get_str(handle, "wifi.username", ident, &len);
// Read anonymous identity.
res = nvs_get_str(handle, "wifi.anon_ident", NULL, &len);
if (res == ESP_ERR_NVS_NOT_FOUND) {
// Default is use the same thing.
anon_ident = strdup(ident);
} else {
if (res) goto errcheck;
anon_ident = malloc(len);
res = nvs_get_str(handle, "wifi.anon_ident", anon_ident, &len);
if (res) goto errcheck;
}
}
// Read password.
res = nvs_get_str(handle, "wifi.password", NULL, &len);
if (res) goto errcheck;
password = malloc(len);
res = nvs_get_str(handle, "wifi.password", password, &len);
if (res) goto errcheck;
// Close NVS.
nvs_close(handle);
// Open the appropriate connection.
if (use_ent) {
result = wifi_connect_ent(ssid, ident, anon_ident, password, phase2, 3);
} else {
result = wifi_connect(ssid, password, authmode, 3);
}
errcheck:
if (res == ESP_ERR_NVS_NOT_FOUND || res == ESP_ERR_NVS_NOT_INITIALIZED) {
// When NVS is not initialised.
ESP_LOGI(TAG, "WiFi settings not stored in NVS.");
} else if (res) {
// Other errors.
ESP_LOGE(TAG, "Error connecting to WiFi: %s", esp_err_to_name(res));
}
// Free memory.
if (ssid) free(ssid);
if (ident) free(ident);
if (anon_ident) free(anon_ident);
if (password) free(password);
return result;
}