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/*
* SPDX-FileCopyrightText: 2019-2021 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
#include "sdkconfig.h"
#include <string.h>
#include <esp_log.h>
#include <esp_err.h>
#include <esp_wifi.h>
#include <protocomm.h>
#include <protocomm_httpd.h>
#include "wifi_provisioning/scheme_softap.h"
#include "wifi_provisioning_priv.h"
typedef struct softap_config {
protocomm_httpd_config_t httpd_config;
char ssid[33];
char password[65];
} wifi_prov_softap_config_t;
static const char *TAG = "wifi_prov_scheme_softap";
extern const wifi_prov_scheme_t wifi_prov_scheme_softap;
static void *scheme_softap_prov_httpd_handle;
static esp_err_t start_wifi_ap(const char *ssid, const char *pass)
{
/* Build Wi-Fi configuration for AP mode */
wifi_config_t wifi_config = {
.ap = {
.max_connection = 5,
},
};
/* SSID can be a non NULL terminated string if `ap.ssid_len` is specified
* Hence, memcpy is used to support 32 bytes long SSID per 802.11 standard */
const size_t ssid_len = strnlen(ssid, sizeof(wifi_config.ap.ssid));
memcpy(wifi_config.ap.ssid, ssid, ssid_len);
wifi_config.ap.ssid_len = ssid_len;
if (strlen(pass) == 0) {
memset(wifi_config.ap.password, 0, sizeof(wifi_config.ap.password));
wifi_config.ap.authmode = WIFI_AUTH_OPEN;
} else {
strlcpy((char *) wifi_config.ap.password, pass, sizeof(wifi_config.ap.password));
wifi_config.ap.authmode = WIFI_AUTH_WPA_WPA2_PSK;
}
/* Run Wi-Fi in AP + STA mode with configuration built above */
esp_err_t err = esp_wifi_set_mode(WIFI_MODE_APSTA);
if (err != ESP_OK) {
ESP_LOGE(TAG, "Failed to set Wi-Fi mode : %d", err);
return err;
}
err = esp_wifi_set_config(WIFI_IF_AP, &wifi_config);
if (err != ESP_OK) {
ESP_LOGE(TAG, "Failed to set Wi-Fi config : %d", err);
return err;
}
return ESP_OK;
}
static esp_err_t prov_start(protocomm_t *pc, void *config)
{
if (!pc) {
ESP_LOGE(TAG, "Protocomm handle cannot be null");
return ESP_ERR_INVALID_ARG;
}
if (!config) {
ESP_LOGE(TAG, "Cannot start with null configuration");
return ESP_ERR_INVALID_ARG;
}
wifi_prov_softap_config_t *softap_config = (wifi_prov_softap_config_t *) config;
protocomm_httpd_config_t *httpd_config = &softap_config->httpd_config;
if (scheme_softap_prov_httpd_handle) {
httpd_config->ext_handle_provided = true;
httpd_config->data.handle = scheme_softap_prov_httpd_handle;
}
/* Start protocomm server on top of HTTP */
esp_err_t err = protocomm_httpd_start(pc, httpd_config);
if (err != ESP_OK) {
ESP_LOGE(TAG, "Failed to start protocomm HTTP server");
return err;
}
/* Start Wi-Fi softAP with specified ssid and password */
err = start_wifi_ap(softap_config->ssid, softap_config->password);
if (err != ESP_OK) {
ESP_LOGE(TAG, "Failed to start Wi-Fi AP");
protocomm_httpd_stop(pc);
return err;
}
return ESP_OK;
}
static esp_err_t prov_stop(protocomm_t *pc)
{
esp_err_t err = protocomm_httpd_stop(pc);
if (err != ESP_OK) {
ESP_LOGW(TAG, "Error occurred while stopping protocomm_httpd");
}
return err;
}
static void *new_config(void)
{
wifi_prov_softap_config_t *softap_config = calloc(1, sizeof(wifi_prov_softap_config_t));
if (!softap_config) {
ESP_LOGE(TAG, "Error allocating memory for new configuration");
return NULL;
}
protocomm_httpd_config_t default_config = {
.data = {
.config = PROTOCOMM_HTTPD_DEFAULT_CONFIG()
}
};
softap_config->httpd_config = default_config;
return softap_config;
}
static void delete_config(void *config)
{
if (!config) {
ESP_LOGE(TAG, "Cannot delete null configuration");
return;
}
wifi_prov_softap_config_t *softap_config = (wifi_prov_softap_config_t *) config;
free(softap_config);
}
static esp_err_t set_config_service(void *config, const char *service_name, const char *service_key)
{
if (!config) {
ESP_LOGE(TAG, "Cannot set null configuration");
return ESP_ERR_INVALID_ARG;
}
if (!service_name) {
ESP_LOGE(TAG, "Service name cannot be NULL");
return ESP_ERR_INVALID_ARG;
}
wifi_prov_softap_config_t *softap_config = (wifi_prov_softap_config_t *) config;
if (service_key) {
const int service_key_len = strlen(service_key);
if (service_key_len < 8 || service_key_len >= sizeof(softap_config->password)) {
ESP_LOGE(TAG, "Incorrect passphrase length for softAP: %d (Expected: Min - 8, Max - 64)", service_key_len);
return ESP_ERR_INVALID_ARG;
}
strlcpy(softap_config->password, service_key, sizeof(softap_config->password));
}
strlcpy(softap_config->ssid, service_name, sizeof(softap_config->ssid));
return ESP_OK;
}
static esp_err_t set_config_endpoint(void *config, const char *endpoint_name, uint16_t uuid)
{
return ESP_OK;
}
void wifi_prov_scheme_softap_set_httpd_handle(void *handle)
{
scheme_softap_prov_httpd_handle = handle;
}
const wifi_prov_scheme_t wifi_prov_scheme_softap = {
.prov_start = prov_start,
.prov_stop = prov_stop,
.new_config = new_config,
.delete_config = delete_config,
.set_config_service = set_config_service,
.set_config_endpoint = set_config_endpoint,
.wifi_mode = WIFI_MODE_APSTA
};
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