142 lines
4.6 KiB
C
142 lines
4.6 KiB
C
/* A very simple OTA example
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*
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* Tries to run both a TFTP client and a TFTP server simultaneously, either will accept a TTP firmware and update it.
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*
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* Not a realistic OTA setup, this needs adapting (choose either client or server) before you'd want to use it.
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*
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* For more information about esp-open-rtos OTA see https://github.com/SuperHouse/esp-open-rtos/wiki/OTA-Update-Configuration
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*
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* NOT SUITABLE TO PUT ON THE INTERNET OR INTO A PRODUCTION ENVIRONMENT!!!!
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*/
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#include <string.h>
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#include "espressif/esp_common.h"
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#include "esp/uart.h"
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#include "FreeRTOS.h"
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#include "task.h"
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#include "esp8266.h"
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#include "ssid_config.h"
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#include "mbedtls/sha256.h"
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#include "ota-tftp.h"
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#include "rboot-api.h"
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/* TFTP client will request this image filenames from this server */
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#define TFTP_IMAGE_SERVER "192.168.1.23"
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#define TFTP_IMAGE_FILENAME1 "firmware1.bin"
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#define TFTP_IMAGE_FILENAME2 "firmware2.bin"
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/* Output of the command 'sha256sum firmware1.bin' */
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static const char *FIRMWARE1_SHA256 = "88199daff8b9e76975f685ec7f95bc1df3c61bd942a33a54a40707d2a41e5488";
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/* Example function to TFTP download a firmware file and verify its SHA256 before
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booting into it.
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*/
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static void tftpclient_download_and_verify_file1(int slot, rboot_config *conf)
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{
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printf("Downloading %s to slot %d...\n", TFTP_IMAGE_FILENAME1, slot);
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int res = ota_tftp_download(TFTP_IMAGE_SERVER, TFTP_PORT+1, TFTP_IMAGE_FILENAME1, 1000, slot, NULL);
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printf("ota_tftp_download %s result %d\n", TFTP_IMAGE_FILENAME1, res);
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if (res != 0) {
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return;
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}
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printf("Looks valid, calculating SHA256...\n");
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uint32_t length;
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bool valid = rboot_verify_image(conf->roms[slot], &length, NULL);
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static mbedtls_sha256_context ctx;
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mbedtls_sha256_init(&ctx);
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mbedtls_sha256_starts(&ctx, 0);
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valid = valid && rboot_digest_image(conf->roms[slot], length, (rboot_digest_update_fn)mbedtls_sha256_update, &ctx);
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static uint8_t hash_result[32];
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mbedtls_sha256_finish(&ctx, hash_result);
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mbedtls_sha256_free(&ctx);
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if(!valid)
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{
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printf("Not valid after all :(\n");
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return;
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}
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printf("Image SHA256 = ");
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valid = true;
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for(int i = 0; i < sizeof(hash_result); i++) {
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char hexbuf[3];
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snprintf(hexbuf, 3, "%02x", hash_result[i]);
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printf(hexbuf);
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if(strncmp(hexbuf, FIRMWARE1_SHA256+i*2, 2))
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valid = false;
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}
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printf("\n");
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if(!valid) {
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printf("Downloaded image SHA256 didn't match expected '%s'\n", FIRMWARE1_SHA256);
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return;
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}
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printf("SHA256 Matches. Rebooting into slot %d...\n", slot);
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rboot_set_current_rom(slot);
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sdk_system_restart();
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}
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/* Much simpler function that just downloads a file via TFTP into an rboot slot.
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(
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*/
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static void tftpclient_download_file2(int slot)
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{
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printf("Downloading %s to slot %d...\n", TFTP_IMAGE_FILENAME2, slot);
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int res = ota_tftp_download(TFTP_IMAGE_SERVER, TFTP_PORT+1, TFTP_IMAGE_FILENAME2, 1000, slot, NULL);
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printf("ota_tftp_download %s result %d\n", TFTP_IMAGE_FILENAME2, res);
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}
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void tftp_client_task(void *pvParameters)
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{
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printf("TFTP client task starting...\n");
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rboot_config conf;
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conf = rboot_get_config();
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int slot = (conf.current_rom + 1) % conf.count;
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printf("Image will be saved in OTA slot %d.\n", slot);
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if(slot == conf.current_rom) {
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printf("FATAL ERROR: Only one OTA slot is configured!\n");
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while(1) {}
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}
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/* Alternate between trying two different filenames. Probalby want to change this if making a practical
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example!
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Note: example will reboot into FILENAME1 if it is successfully downloaded, but FILENAME2 is ignored.
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*/
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while(1) {
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tftpclient_download_and_verify_file1(slot, &conf);
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vTaskDelay(5000 / portTICK_PERIOD_MS);
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tftpclient_download_file2(slot);
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vTaskDelay(5000 / portTICK_PERIOD_MS);
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}
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}
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void user_init(void)
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{
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uart_set_baud(0, 115200);
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rboot_config conf = rboot_get_config();
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printf("\r\n\r\nOTA Basic demo.\r\nCurrently running on flash slot %d / %d.\r\n\r\n",
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conf.current_rom, conf.count);
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printf("Image addresses in flash:\r\n");
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for(int i = 0; i <conf.count; i++) {
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printf("%c%d: offset 0x%08x\r\n", i == conf.current_rom ? '*':' ', i, conf.roms[i]);
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}
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struct sdk_station_config config = {
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.ssid = WIFI_SSID,
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.password = WIFI_PASS,
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};
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sdk_wifi_set_opmode(STATION_MODE);
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sdk_wifi_station_set_config(&config);
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printf("Starting TFTP server...");
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ota_tftp_init_server(TFTP_PORT);
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xTaskCreate(&tftp_client_task, "tftp_client", 2048, NULL, 2, NULL);
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}
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