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/*
* SPDX-FileCopyrightText: 2019-2022 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <stdio.h>
#include <string.h>
#include <esp_err.h>
#include <esp_log.h>
#include <esp_wifi.h>
#include <esp_netif.h>
#include "wifi_provisioning/wifi_config.h"
#include "wifi_provisioning/wifi_scan.h"
#include "wifi_ctrl.h"
#include "wifi_provisioning/manager.h"
#include "wifi_provisioning_priv.h"
static const char *TAG = "wifi_prov_handlers";
/* Provide definition of wifi_prov_ctx_t */
struct wifi_prov_ctx {
wifi_config_t wifi_cfg;
};
static wifi_config_t *get_config(wifi_prov_ctx_t **ctx)
{
return (*ctx ? & (*ctx)->wifi_cfg : NULL);
}
static wifi_config_t *new_config(wifi_prov_ctx_t **ctx)
{
free(*ctx);
(*ctx) = (wifi_prov_ctx_t *) calloc(1, sizeof(wifi_prov_ctx_t));
return get_config(ctx);
}
static void free_config(wifi_prov_ctx_t **ctx)
{
free(*ctx);
*ctx = NULL;
}
static esp_err_t get_status_handler(wifi_prov_config_get_data_t *resp_data, wifi_prov_ctx_t **ctx)
{
/* Initialize to zero */
memset(resp_data, 0, sizeof(wifi_prov_config_get_data_t));
if (wifi_prov_mgr_get_wifi_state(&resp_data->wifi_state) != ESP_OK) {
ESP_LOGW(TAG, "Wi-Fi provisioning manager not running");
return ESP_ERR_INVALID_STATE;
}
if (resp_data->wifi_state == WIFI_PROV_STA_CONNECTED) {
ESP_LOGD(TAG, "Got state : connected");
/* IP Addr assigned to STA */
esp_netif_ip_info_t ip_info;
esp_netif_get_ip_info(esp_netif_get_handle_from_ifkey("WIFI_STA_DEF"), &ip_info);
esp_ip4addr_ntoa(&ip_info.ip, resp_data->conn_info.ip_addr, sizeof(resp_data->conn_info.ip_addr));
/* AP information to which STA is connected */
wifi_ap_record_t ap_info;
esp_wifi_sta_get_ap_info(&ap_info);
memcpy(resp_data->conn_info.bssid, (char *)ap_info.bssid, sizeof(ap_info.bssid));
memcpy(resp_data->conn_info.ssid, (char *)ap_info.ssid, sizeof(ap_info.ssid));
resp_data->conn_info.channel = ap_info.primary;
resp_data->conn_info.auth_mode = ap_info.authmode;
/* Tell manager to stop provisioning service */
wifi_prov_mgr_done();
} else if (resp_data->wifi_state == WIFI_PROV_STA_DISCONNECTED) {
ESP_LOGD(TAG, "Got state : disconnected");
/* If disconnected, convey reason */
wifi_prov_mgr_get_wifi_disconnect_reason(&resp_data->fail_reason);
} else {
if (wifi_prov_mgr_get_remaining_conn_attempts(&resp_data->connecting_info.attempts_remaining) != ESP_OK) {
ESP_LOGW(TAG, "Wi-Fi provisioning manager not running");
return ESP_ERR_INVALID_STATE;
}
ESP_LOGD(TAG, "Got state : connecting");
}
return ESP_OK;
}
static esp_err_t set_config_handler(const wifi_prov_config_set_data_t *req_data, wifi_prov_ctx_t **ctx)
{
wifi_config_t *wifi_cfg = get_config(ctx);
if (wifi_cfg) {
free_config(ctx);
}
wifi_cfg = new_config(ctx);
if (!wifi_cfg) {
ESP_LOGE(TAG, "Unable to allocate Wi-Fi config");
return ESP_ERR_NO_MEM;
}
ESP_LOGD(TAG, "Wi-Fi Credentials Received");
/* Using memcpy allows the max SSID length to be 32 bytes (as per 802.11 standard).
* But this doesn't guarantee that the saved SSID will be null terminated, because
* wifi_cfg->sta.ssid is also 32 bytes long (without extra 1 byte for null character).
* Although, this is not a matter for concern because esp_wifi library reads the SSID
* upto 32 bytes in absence of null termination */
const size_t ssid_len = strnlen(req_data->ssid, sizeof(wifi_cfg->sta.ssid));
/* Ensure SSID less than 32 bytes is null terminated */
memset(wifi_cfg->sta.ssid, 0, sizeof(wifi_cfg->sta.ssid));
memcpy(wifi_cfg->sta.ssid, req_data->ssid, ssid_len);
/* Using strlcpy allows both max passphrase length (63 bytes) and ensures null termination
* because size of wifi_cfg->sta.password is 64 bytes (1 extra byte for null character) */
strlcpy((char *) wifi_cfg->sta.password, req_data->password, sizeof(wifi_cfg->sta.password));
#ifdef CONFIG_WIFI_PROV_STA_ALL_CHANNEL_SCAN
wifi_cfg->sta.scan_method = WIFI_ALL_CHANNEL_SCAN;
#else /* CONFIG_WIFI_PROV_STA_FAST_SCAN */
wifi_cfg->sta.scan_method = WIFI_FAST_SCAN;
#endif
return ESP_OK;
}
static esp_err_t apply_config_handler(wifi_prov_ctx_t **ctx)
{
wifi_config_t *wifi_cfg = get_config(ctx);
if (!wifi_cfg) {
ESP_LOGE(TAG, "Wi-Fi config not set");
return ESP_ERR_INVALID_STATE;
}
esp_err_t ret = wifi_prov_mgr_configure_sta(wifi_cfg);
if (ret == ESP_OK) {
ESP_LOGD(TAG, "Wi-Fi Credentials Applied");
} else {
ESP_LOGE(TAG, "Failed to apply Wi-Fi Credentials");
}
free_config(ctx);
return ret;
}
esp_err_t get_wifi_prov_handlers(wifi_prov_config_handlers_t *ptr)
{
if (!ptr) {
return ESP_ERR_INVALID_ARG;
}
ptr->get_status_handler = get_status_handler;
ptr->set_config_handler = set_config_handler;
ptr->apply_config_handler = apply_config_handler;
ptr->ctx = NULL;
return ESP_OK;
}
/*************************************************************************/
static esp_err_t scan_start(bool blocking, bool passive,
uint8_t group_channels, uint32_t period_ms,
wifi_prov_scan_ctx_t **ctx)
{
return wifi_prov_mgr_wifi_scan_start(blocking, passive, group_channels, period_ms);
}
static esp_err_t scan_status(bool *scan_finished,
uint16_t *result_count,
wifi_prov_scan_ctx_t **ctx)
{
*scan_finished = wifi_prov_mgr_wifi_scan_finished();
*result_count = wifi_prov_mgr_wifi_scan_result_count();
return ESP_OK;
}
static esp_err_t scan_result(uint16_t result_index,
wifi_prov_scan_result_t *result,
wifi_prov_scan_ctx_t **ctx)
{
const wifi_ap_record_t *record = wifi_prov_mgr_wifi_scan_result(result_index);
if (!record) {
return ESP_FAIL;
}
/* Compile time check ensures memory safety in case SSID length in
* record / result structure definition changes in future */
_Static_assert(sizeof(result->ssid) == sizeof(record->ssid),
"source and destination should be of same size");
memcpy(result->ssid, record->ssid, sizeof(record->ssid));
memcpy(result->bssid, record->bssid, sizeof(record->bssid));
result->channel = record->primary;
result->rssi = record->rssi;
result->auth = record->authmode;
return ESP_OK;
}
esp_err_t get_wifi_scan_handlers(wifi_prov_scan_handlers_t *ptr)
{
if (!ptr) {
return ESP_ERR_INVALID_ARG;
}
ptr->scan_start = scan_start;
ptr->scan_status = scan_status;
ptr->scan_result = scan_result;
ptr->ctx = NULL;
return ESP_OK;
}
/*************************************************************************/
static esp_err_t ctrl_reset(void)
{
return wifi_prov_mgr_reset_sm_state_on_failure();
}
static esp_err_t ctrl_reprov(void)
{
return wifi_prov_mgr_reset_sm_state_for_reprovision();
}
esp_err_t get_wifi_ctrl_handlers(wifi_ctrl_handlers_t *ptr)
{
if (!ptr) {
return ESP_ERR_INVALID_ARG;
}
ptr->ctrl_reset = ctrl_reset;
ptr->ctrl_reprov = ctrl_reprov;
return ESP_OK;
}
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