//?Copyright?2015-2016?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?
#include?
#include?
#include?
#include?
#include?
#include?
#include?
#include?

#include?“esp_err.h“
#include?“esp_partition.h“
#include?“esp_spi_flash.h“
#include?“esp_image_format.h“
#include?“esp_secure_boot.h“
#include?“sdkconfig.h“

#include?“esp_ota_ops.h“
#include?“sys/queue.h“
#include?“crc.h“
#include?“esp_log.h“

#ifdef?CONFIG_TARGET_PLATFORM_ESP8266
#include?“spi_flash.h“
esp_err_t?bootloader_flash_read（size_t?src_addr?void?*dest?size_t?size?bool?allow_decrypt）;
#endif

#define?OTA_MAX（ab）?（（a）?>=?（b）???（a）?:?（b））?
#define?OTA_MIN（ab）?（（a）?<=?（b）???（a）?:?（b））?
#define?SUB_TYPE_ID（i）?（i?&?0x0F）?

typedef?struct?ota_ops_entry_?{
????uint32_t?handle;
????const?esp_partition_t?*part;
????uint32_t?erased_size;
????uint32_t?wrote_size;
????uint8_t?partial_bytes;
????uint8_t?partial_data[16];
????LIST_ENTRY（ota_ops_entry_）?entries;
}?ota_ops_entry_t;

/*?OTA?selection?structure?（two?copies?in?the?OTA?data?partition.）
???Size?of?32?bytes?is?friendly?to?flash?encryption?*/
typedef?struct?{
????uint32_t?ota_seq;
????uint8_t??seq_label[24];
????uint32_t?crc;????????????????/*?CRC32?of?ota_seq?field?only?*/
}?ota_select;

static?LIST_HEAD（ota_ops_entries_head?ota_ops_entry_）?s_ota_ops_entries_head?=
????LIST_HEAD_INITIALIZER（s_ota_ops_entries_head）;

static?uint32_t?s_ota_ops_last_handle?=?0;
static?ota_select?s_ota_select[2];

const?static?char?*TAG?=?“esp_ota_ops“;

/*?Return?true?if?this?is?an?OTA?app?partition?*/
static?bool?is_ota_partition（const?esp_partition_t?*p）
{
????return?（p?!=?NULL
????????????&&?p->type?==?ESP_PARTITION_TYPE_APP
????????????&&?p->subtype?>=?ESP_PARTITION_SUBTYPE_APP_OTA_0
????????????&&?p->subtype?}

esp_err_t?esp_ota_begin（const?esp_partition_t?*partition?size_t?image_size?esp_ota_handle_t?*out_handle）
{
????ota_ops_entry_t?*new_entry;
????esp_err_t?ret?=?ESP_OK;

????if?（（partition?==?NULL）?||?（out_handle?==?NULL））?{
????????return?ESP_ERR_INVALID_ARG;
????}

????partition?=?esp_partition_verify（partition）;
????if?（partition?==?NULL）?{
????????return?ESP_ERR_NOT_FOUND;
????}

????if?（!is_ota_partition（partition））?{
????????return?ESP_ERR_INVALID_ARG;
????}

????if?（partition?==?esp_ota_get_running_partition（））?{
????????return?ESP_ERR_OTA_PARTITION

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2018-09-07?06:10??ESP8266_RTOS_SDK-3.0\
?????文件??????????32??2018-09-07?06:10??ESP8266_RTOS_SDK-3.0\.gitattributes
?????文件?????????282??2018-09-07?06:10??ESP8266_RTOS_SDK-3.0\.gitignore
?????文件????????2597??2018-09-07?06:10??ESP8266_RTOS_SDK-3.0\.gitlab-ci.yml
?????文件????????5838??2018-09-07?06:10??ESP8266_RTOS_SDK-3.0\Kconfig
?????文件???????11358??2018-09-07?06:10??ESP8266_RTOS_SDK-3.0\LICENSE
?????文件????????7850??2018-09-07?06:10??ESP8266_RTOS_SDK-3.0\README.md
?????目錄???????????0??2018-09-07?06:10??ESP8266_RTOS_SDK-3.0\components\
?????文件?????????595??2018-09-07?06:10??ESP8266_RTOS_SDK-3.0\components\VERSION.md
?????目錄???????????0??2018-09-07?06:10??ESP8266_RTOS_SDK-3.0\components\app_update\
?????文件?????????131??2018-09-07?06:10??ESP8266_RTOS_SDK-3.0\components\app_update\component.mk
?????文件???????22424??2018-09-07?06:10??ESP8266_RTOS_SDK-3.0\components\app_update\esp_ota_ops.c
?????目錄???????????0??2018-09-07?06:10??ESP8266_RTOS_SDK-3.0\components\app_update\include\
?????文件????????8529??2018-09-07?06:10??ESP8266_RTOS_SDK-3.0\components\app_update\include\esp_ota_ops.h
?????目錄???????????0??2018-09-07?06:10??ESP8266_RTOS_SDK-3.0\components\app_update\test\
?????文件?????????112??2018-09-07?06:10??ESP8266_RTOS_SDK-3.0\components\app_update\test\component.mk
?????文件????????3352??2018-09-07?06:10??ESP8266_RTOS_SDK-3.0\components\app_update\test\test_ota_ops.c
?????目錄???????????0??2018-09-07?06:10??ESP8266_RTOS_SDK-3.0\components\aws_iot\
?????文件????????5168??2018-09-07?06:10??ESP8266_RTOS_SDK-3.0\components\aws_iot\Kconfig
?????目錄???????????0??2018-09-07?06:10??ESP8266_RTOS_SDK-3.0\components\aws_iot\aws-iot-device-sdk-embedded-C\
?????文件????????8772??2018-09-07?06:10??ESP8266_RTOS_SDK-3.0\components\aws_iot\aws-iot-device-sdk-embedded-C\CHANGELOG.md
?????文件???????19046??2018-09-07?06:10??ESP8266_RTOS_SDK-3.0\components\aws_iot\aws-iot-device-sdk-embedded-C\CppUTestMakefileWorker.mk
?????文件???????13179??2018-09-07?06:10??ESP8266_RTOS_SDK-3.0\components\aws_iot\aws-iot-device-sdk-embedded-C\LICENSE.txt
?????文件????????3622??2018-09-07?06:10??ESP8266_RTOS_SDK-3.0\components\aws_iot\aws-iot-device-sdk-embedded-C\Makefile
?????文件?????????647??2018-09-07?06:10??ESP8266_RTOS_SDK-3.0\components\aws_iot\aws-iot-device-sdk-embedded-C\NOTICE.txt
?????文件???????10431??2018-09-07?06:10??ESP8266_RTOS_SDK-3.0\components\aws_iot\aws-iot-device-sdk-embedded-C\PortingGuide.md
?????文件????????9989??2018-09-07?06:10??ESP8266_RTOS_SDK-3.0\components\aws_iot\aws-iot-device-sdk-embedded-C\README.md
?????目錄???????????0??2018-09-07?06:10??ESP8266_RTOS_SDK-3.0\components\aws_iot\aws-iot-device-sdk-embedded-C\certs\
?????文件?????????388??2018-09-07?06:10??ESP8266_RTOS_SDK-3.0\components\aws_iot\aws-iot-device-sdk-embedded-C\certs\README.txt
?????目錄???????????0??2018-09-07?06:10??ESP8266_RTOS_SDK-3.0\components\aws_iot\aws-iot-device-sdk-embedded-C\external_libs\
?????目錄???????????0??2018-09-07?06:10??ESP8266_RTOS_SDK-3.0\components\aws_iot\aws-iot-device-sdk-embedded-C\external_libs\CppUTest\
............此處省略1940個文件信息