- provides object oriented access to network intefaces - not limited to default netifs - more generic abstraction to network input output functions - event handler registration removed from component responsibility - backward compatibility layer for legacy tcpip_apapter APIs Closes IDF-39
199 lines
6.5 KiB
C
199 lines
6.5 KiB
C
// Copyright 2019 Espressif Systems (Shanghai) PTE LTD
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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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#include <stdio.h>
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#include <string.h>
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#include <esp_err.h>
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#include <esp_log.h>
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#include <esp_wifi.h>
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#include <esp_netif.h>
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#include "wifi_provisioning/wifi_config.h"
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#include "wifi_provisioning/wifi_scan.h"
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#include "wifi_provisioning/manager.h"
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#include "wifi_provisioning_priv.h"
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static const char *TAG = "wifi_prov_handlers";
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/* Provide definition of wifi_prov_ctx_t */
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struct wifi_prov_ctx {
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wifi_config_t wifi_cfg;
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};
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static wifi_config_t *get_config(wifi_prov_ctx_t **ctx)
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{
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return (*ctx ? & (*ctx)->wifi_cfg : NULL);
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}
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static wifi_config_t *new_config(wifi_prov_ctx_t **ctx)
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{
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free(*ctx);
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(*ctx) = (wifi_prov_ctx_t *) calloc(1, sizeof(wifi_prov_ctx_t));
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return get_config(ctx);
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}
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static void free_config(wifi_prov_ctx_t **ctx)
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{
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free(*ctx);
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*ctx = NULL;
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}
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static esp_err_t get_status_handler(wifi_prov_config_get_data_t *resp_data, wifi_prov_ctx_t **ctx)
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{
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/* Initialize to zero */
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memset(resp_data, 0, sizeof(wifi_prov_config_get_data_t));
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if (wifi_prov_mgr_get_wifi_state(&resp_data->wifi_state) != ESP_OK) {
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ESP_LOGW(TAG, "Wi-Fi provisioning manager not running");
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return ESP_ERR_INVALID_STATE;
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}
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if (resp_data->wifi_state == WIFI_PROV_STA_CONNECTED) {
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ESP_LOGD(TAG, "Got state : connected");
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/* IP Addr assigned to STA */
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esp_netif_ip_info_t ip_info;
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esp_netif_get_ip_info(esp_netif_get_handle_from_ifkey("WIFI_STA_DEF"), &ip_info);
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esp_ip4addr_ntoa(&ip_info.ip, resp_data->conn_info.ip_addr, sizeof(resp_data->conn_info.ip_addr));
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/* AP information to which STA is connected */
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wifi_ap_record_t ap_info;
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esp_wifi_sta_get_ap_info(&ap_info);
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memcpy(resp_data->conn_info.bssid, (char *)ap_info.bssid, sizeof(ap_info.bssid));
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memcpy(resp_data->conn_info.ssid, (char *)ap_info.ssid, sizeof(ap_info.ssid));
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resp_data->conn_info.channel = ap_info.primary;
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resp_data->conn_info.auth_mode = ap_info.authmode;
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/* Tell manager to stop provisioning service */
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wifi_prov_mgr_done();
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} else if (resp_data->wifi_state == WIFI_PROV_STA_DISCONNECTED) {
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ESP_LOGD(TAG, "Got state : disconnected");
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/* If disconnected, convey reason */
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wifi_prov_mgr_get_wifi_disconnect_reason(&resp_data->fail_reason);
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} else {
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ESP_LOGD(TAG, "Got state : connecting");
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}
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return ESP_OK;
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}
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static esp_err_t set_config_handler(const wifi_prov_config_set_data_t *req_data, wifi_prov_ctx_t **ctx)
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{
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wifi_config_t *wifi_cfg = get_config(ctx);
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if (wifi_cfg) {
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free_config(ctx);
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}
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wifi_cfg = new_config(ctx);
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if (!wifi_cfg) {
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ESP_LOGE(TAG, "Unable to allocate Wi-Fi config");
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return ESP_ERR_NO_MEM;
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}
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ESP_LOGD(TAG, "Wi-Fi Credentials Received");
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/* Using strncpy allows the max SSID length to be 32 bytes (as per 802.11 standard).
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* But this doesn't guarantee that the saved SSID will be null terminated, because
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* wifi_cfg->sta.ssid is also 32 bytes long (without extra 1 byte for null character) */
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strncpy((char *) wifi_cfg->sta.ssid, req_data->ssid, sizeof(wifi_cfg->sta.ssid));
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/* Using strlcpy allows both max passphrase length (63 bytes) and ensures null termination
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* because size of wifi_cfg->sta.password is 64 bytes (1 extra byte for null character) */
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strlcpy((char *) wifi_cfg->sta.password, req_data->password, sizeof(wifi_cfg->sta.password));
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return ESP_OK;
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}
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static esp_err_t apply_config_handler(wifi_prov_ctx_t **ctx)
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{
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wifi_config_t *wifi_cfg = get_config(ctx);
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if (!wifi_cfg) {
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ESP_LOGE(TAG, "Wi-Fi config not set");
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return ESP_ERR_INVALID_STATE;
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}
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esp_err_t ret = wifi_prov_mgr_configure_sta(wifi_cfg);
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if (ret == ESP_OK) {
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ESP_LOGD(TAG, "Wi-Fi Credentials Applied");
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} else {
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ESP_LOGE(TAG, "Failed to apply Wi-Fi Credentials");
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}
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free_config(ctx);
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return ret;
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}
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esp_err_t get_wifi_prov_handlers(wifi_prov_config_handlers_t *ptr)
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{
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if (!ptr) {
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return ESP_ERR_INVALID_ARG;
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}
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ptr->get_status_handler = get_status_handler;
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ptr->set_config_handler = set_config_handler;
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ptr->apply_config_handler = apply_config_handler;
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ptr->ctx = NULL;
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return ESP_OK;
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}
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/*************************************************************************/
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static esp_err_t scan_start(bool blocking, bool passive,
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uint8_t group_channels, uint32_t period_ms,
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wifi_prov_scan_ctx_t **ctx)
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{
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return wifi_prov_mgr_wifi_scan_start(blocking, passive, group_channels, period_ms);
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}
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static esp_err_t scan_status(bool *scan_finished,
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uint16_t *result_count,
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wifi_prov_scan_ctx_t **ctx)
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{
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*scan_finished = wifi_prov_mgr_wifi_scan_finished();
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*result_count = wifi_prov_mgr_wifi_scan_result_count();
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return ESP_OK;
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}
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static esp_err_t scan_result(uint16_t result_index,
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wifi_prov_scan_result_t *result,
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wifi_prov_scan_ctx_t **ctx)
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{
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const wifi_ap_record_t *record = wifi_prov_mgr_wifi_scan_result(result_index);
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if (!record) {
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return ESP_FAIL;
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}
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/* Compile time check ensures memory safety in case SSID length in
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* record / result structure definition changes in future */
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_Static_assert(sizeof(result->ssid) == sizeof(record->ssid),
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"source and destination should be of same size");
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memcpy(result->ssid, record->ssid, sizeof(record->ssid));
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memcpy(result->bssid, record->bssid, sizeof(record->bssid));
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result->channel = record->primary;
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result->rssi = record->rssi;
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result->auth = record->authmode;
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return ESP_OK;
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}
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esp_err_t get_wifi_scan_handlers(wifi_prov_scan_handlers_t *ptr)
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{
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if (!ptr) {
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return ESP_ERR_INVALID_ARG;
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}
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ptr->scan_start = scan_start;
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ptr->scan_status = scan_status;
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ptr->scan_result = scan_result;
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ptr->ctx = NULL;
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return ESP_OK;
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}
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