/* * SPDX-FileCopyrightText: 2017-2022 Espressif Systems (Shanghai) CO LTD * * SPDX-License-Identifier: Apache-2.0 */ #pragma once #include #include #include "esp_app_desc.h" #include #include "esp_event.h" #include "esp_partition.h" #ifdef __cplusplus extern "C" { #endif ESP_EVENT_DECLARE_BASE(ESP_HTTPS_OTA_EVENT); /** * @brief Events generated by OTA process */ typedef enum { ESP_HTTPS_OTA_START, /*!< OTA started */ ESP_HTTPS_OTA_CONNECTED, /*!< Connected to server */ ESP_HTTPS_OTA_GET_IMG_DESC, /*!< Read app description from image header */ ESP_HTTPS_OTA_VERIFY_CHIP_ID, /*!< Verify chip id of new image */ ESP_HTTPS_OTA_DECRYPT_CB, /*!< Callback to decrypt function */ ESP_HTTPS_OTA_WRITE_FLASH, /*!< Flash write operation */ ESP_HTTPS_OTA_UPDATE_BOOT_PARTITION, /*!< Boot partition update after successful ota update */ ESP_HTTPS_OTA_FINISH, /*!< OTA finished */ ESP_HTTPS_OTA_ABORT, /*!< OTA aborted */ } esp_https_ota_event_t; typedef void *esp_https_ota_handle_t; typedef esp_err_t(*http_client_init_cb_t)(esp_http_client_handle_t); #if CONFIG_ESP_HTTPS_OTA_DECRYPT_CB typedef struct { const char *data_in; /*!< Pointer to data to be decrypted */ size_t data_in_len; /*!< Input data length */ char *data_out; /*!< Pointer to data decrypted using callback, this will be freed after data is written to flash */ size_t data_out_len; /*!< Output data length */ } decrypt_cb_arg_t; typedef esp_err_t(*decrypt_cb_t)(decrypt_cb_arg_t *args, void *user_ctx); #endif // CONFIG_ESP_HTTPS_OTA_DECRYPT_CB /** * @brief ESP HTTPS OTA configuration */ typedef struct { const esp_http_client_config_t *http_config; /*!< ESP HTTP client configuration */ http_client_init_cb_t http_client_init_cb; /*!< Callback after ESP HTTP client is initialised */ bool bulk_flash_erase; /*!< Erase entire flash partition during initialization. By default flash partition is erased during write operation and in chunk of 4K sector size */ bool partial_http_download; /*!< Enable Firmware image to be downloaded over multiple HTTP requests */ int max_http_request_size; /*!< Maximum request size for partial HTTP download */ #if CONFIG_ESP_HTTPS_OTA_DECRYPT_CB decrypt_cb_t decrypt_cb; /*!< Callback for external decryption layer */ void *decrypt_user_ctx; /*!< User context for external decryption layer */ uint16_t enc_img_header_size; /*!< Header size of pre-encrypted ota image header */ #endif } esp_https_ota_config_t; #define ESP_ERR_HTTPS_OTA_BASE (0x9000) #define ESP_ERR_HTTPS_OTA_IN_PROGRESS (ESP_ERR_HTTPS_OTA_BASE + 1) /* OTA operation in progress */ /** * @brief HTTPS OTA Firmware upgrade. * * This function allocates HTTPS OTA Firmware upgrade context, establishes HTTPS connection, * reads image data from HTTP stream and writes it to OTA partition and * finishes HTTPS OTA Firmware upgrade operation. * This API supports URL redirection, but if CA cert of URLs differ then it * should be appended to `cert_pem` member of `ota_config->http_config`. * * @param[in] ota_config pointer to esp_https_ota_config_t structure. * * @note This API handles the entire OTA operation, so if this API is being used * then no other APIs from `esp_https_ota` component should be called. * If more information and control is needed during the HTTPS OTA process, * then one can use `esp_https_ota_begin` and subsequent APIs. If this API returns * successfully, esp_restart() must be called to boot from the new firmware image. * * @return * - ESP_OK: OTA data updated, next reboot will use specified partition. * - ESP_FAIL: For generic failure. * - ESP_ERR_INVALID_ARG: Invalid argument * - ESP_ERR_OTA_VALIDATE_FAILED: Invalid app image * - ESP_ERR_NO_MEM: Cannot allocate memory for OTA operation. * - ESP_ERR_FLASH_OP_TIMEOUT or ESP_ERR_FLASH_OP_FAIL: Flash write failed. * - For other return codes, refer OTA documentation in esp-idf's app_update component. */ esp_err_t esp_https_ota(const esp_https_ota_config_t *ota_config); /** * @brief Start HTTPS OTA Firmware upgrade * * This function initializes ESP HTTPS OTA context and establishes HTTPS connection. * This function must be invoked first. If this function returns successfully, then `esp_https_ota_perform` should be * called to continue with the OTA process and there should be a call to `esp_https_ota_finish` on * completion of OTA operation or on failure in subsequent operations. * This API supports URL redirection, but if CA cert of URLs differ then it * should be appended to `cert_pem` member of `http_config`, which is a part of `ota_config`. * In case of error, this API explicitly sets `handle` to NULL. * * @param[in] ota_config pointer to esp_https_ota_config_t structure * @param[out] handle pointer to an allocated data of type `esp_https_ota_handle_t` * which will be initialised in this function * * @note This API is blocking, so setting `is_async` member of `http_config` structure will * result in an error. * * @return * - ESP_OK: HTTPS OTA Firmware upgrade context initialised and HTTPS connection established * - ESP_FAIL: For generic failure. * - ESP_ERR_INVALID_ARG: Invalid argument (missing/incorrect config, certificate, etc.) * - For other return codes, refer documentation in app_update component and esp_http_client * component in esp-idf. */ esp_err_t esp_https_ota_begin(const esp_https_ota_config_t *ota_config, esp_https_ota_handle_t *handle); /** * @brief Read image data from HTTP stream and write it to OTA partition * * This function reads image data from HTTP stream and writes it to OTA partition. This function * must be called only if esp_https_ota_begin() returns successfully. * This function must be called in a loop since it returns after every HTTP read operation thus * giving you the flexibility to stop OTA operation midway. * * @param[in] https_ota_handle pointer to esp_https_ota_handle_t structure * * @return * - ESP_ERR_HTTPS_OTA_IN_PROGRESS: OTA update is in progress, call this API again to continue. * - ESP_OK: OTA update was successful * - ESP_FAIL: OTA update failed * - ESP_ERR_INVALID_ARG: Invalid argument * - ESP_ERR_INVALID_VERSION: Invalid chip revision in image header * - ESP_ERR_OTA_VALIDATE_FAILED: Invalid app image * - ESP_ERR_NO_MEM: Cannot allocate memory for OTA operation. * - ESP_ERR_FLASH_OP_TIMEOUT or ESP_ERR_FLASH_OP_FAIL: Flash write failed. * - For other return codes, refer OTA documentation in esp-idf's app_update component. */ esp_err_t esp_https_ota_perform(esp_https_ota_handle_t https_ota_handle); /** * @brief Checks if complete data was received or not * * @note This API can be called just before esp_https_ota_finish() to validate if the complete image was indeed received. * * @param[in] https_ota_handle pointer to esp_https_ota_handle_t structure * * @return * - false * - true */ bool esp_https_ota_is_complete_data_received(esp_https_ota_handle_t https_ota_handle); /** * @brief Clean-up HTTPS OTA Firmware upgrade and close HTTPS connection * * This function closes the HTTP connection and frees the ESP HTTPS OTA context. * This function switches the boot partition to the OTA partition containing the * new firmware image. * * @note If this API returns successfully, esp_restart() must be called to * boot from the new firmware image * esp_https_ota_finish should not be called after calling esp_https_ota_abort * * @param[in] https_ota_handle pointer to esp_https_ota_handle_t structure * * @return * - ESP_OK: Clean-up successful * - ESP_ERR_INVALID_STATE * - ESP_ERR_INVALID_ARG: Invalid argument * - ESP_ERR_OTA_VALIDATE_FAILED: Invalid app image */ esp_err_t esp_https_ota_finish(esp_https_ota_handle_t https_ota_handle); /** * @brief Clean-up HTTPS OTA Firmware upgrade and close HTTPS connection * * This function closes the HTTP connection and frees the ESP HTTPS OTA context. * * @note esp_https_ota_abort should not be called after calling esp_https_ota_finish * * @param[in] https_ota_handle pointer to esp_https_ota_handle_t structure * * @return * - ESP_OK: Clean-up successful * - ESP_ERR_INVALID_STATE: Invalid ESP HTTPS OTA state * - ESP_FAIL: OTA not started * - ESP_ERR_NOT_FOUND: OTA handle not found * - ESP_ERR_INVALID_ARG: Invalid argument */ esp_err_t esp_https_ota_abort(esp_https_ota_handle_t https_ota_handle); /** * @brief Reads app description from image header. The app description provides information * like the "Firmware version" of the image. * * @note This API can be called only after esp_https_ota_begin() and before esp_https_ota_perform(). * Calling this API is not mandatory. * * @param[in] https_ota_handle pointer to esp_https_ota_handle_t structure * @param[out] new_app_info pointer to an allocated esp_app_desc_t structure * * @return * - ESP_ERR_INVALID_ARG: Invalid arguments * - ESP_ERR_INVALID_STATE: Invalid state to call this API. esp_https_ota_begin() not called yet. * - ESP_FAIL: Failed to read image descriptor * - ESP_OK: Successfully read image descriptor */ esp_err_t esp_https_ota_get_img_desc(esp_https_ota_handle_t https_ota_handle, esp_app_desc_t *new_app_info); /** * @brief This function returns OTA image data read so far. * * @note This API should be called only if `esp_https_ota_perform()` has been called atleast once or * if `esp_https_ota_get_img_desc` has been called before. * * @param[in] https_ota_handle pointer to esp_https_ota_handle_t structure * * @return * - -1 On failure * - total bytes read so far */ int esp_https_ota_get_image_len_read(esp_https_ota_handle_t https_ota_handle); /** * @brief This function returns OTA image total size. * * @note This API should be called after esp_https_ota_begin() has been already called. * This can be used to create some sort of progress indication * (in combination with esp_https_ota_get_image_len_read()) * * @param[in] https_ota_handle pointer to esp_https_ota_handle_t structure * * @return * - -1 On failure or chunked encoding * - total bytes of image */ int esp_https_ota_get_image_size(esp_https_ota_handle_t https_ota_handle); #ifdef __cplusplus } #endif