esp-idf/components/wifi_provisioning/src/handlers.c

147 lines
4.7 KiB
C

// Copyright 2019 Espressif Systems (Shanghai) PTE LTD
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include <stdio.h>
#include <string.h>
#include <esp_err.h>
#include <esp_log.h>
#include <esp_wifi.h>
#include <tcpip_adapter.h>
#include "wifi_provisioning/wifi_config.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 */
tcpip_adapter_ip_info_t ip_info;
tcpip_adapter_get_ip_info(TCPIP_ADAPTER_IF_STA, &ip_info);
char *ip_addr = ip4addr_ntoa(&ip_info.ip);
strcpy(resp_data->conn_info.ip_addr, 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 {
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 strncpy 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) */
strncpy((char *) wifi_cfg->sta.ssid, req_data->ssid, sizeof(wifi_cfg->sta.ssid));
/* 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));
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;
}
wifi_prov_config_handlers_t get_wifi_prov_handlers(void)
{
wifi_prov_config_handlers_t wifi_prov_handlers = {
.get_status_handler = get_status_handler,
.set_config_handler = set_config_handler,
.apply_config_handler = apply_config_handler,
.ctx = NULL
};
return wifi_prov_handlers;
}