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ota_basic example cleanup

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This commit is contained in:
Angus Gratton 2016-05-23 12:23:04 +10:00
parent d9202af2aa
commit d62fd4899a
1 changed files with 69 additions and 46 deletions
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115
examples/ota_basic/ota_basic.c
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@ -1,6 +1,8 @@
/* A very simple OTA example
*
* Binds a TCP socket, reads an image from it over TFTP and then flashes live.
* Tries to run both a TFTP client and a TFTP server simultaneously, either will accept a TTP firmware and update it.
*
* Not a realistic OTA setup, this needs adapting (choose either client or server) before you'd want to use it.
*
* For more information about esp-open-rtos OTA see https://github.com/SuperHouse/esp-open-rtos/wiki/OTA-Update-Configuration
*
@ -18,6 +20,7 @@
#include "ota-tftp.h"
#include "rboot-api.h"
/* TFTP client will request this image filenames from this server */
#define TFTP_IMAGE_SERVER "192.168.1.23"
#define TFTP_IMAGE_FILENAME1 "firmware1.bin"
#define TFTP_IMAGE_FILENAME2 "firmware2.bin"
@ -25,6 +28,68 @@
/* Output of the command 'sha256sum firmware1.bin' */
static const char *FIRMWARE1_SHA256 = "88199daff8b9e76975f685ec7f95bc1df3c61bd942a33a54a40707d2a41e5488";
/* Example function to TFTP download a firmware file and verify its SHA256 before
booting into it.
*/
static void tftpclient_download_and_verify_file1(int slot, rboot_config *conf)
{
printf("Downloading %s to slot %d...\n", TFTP_IMAGE_FILENAME1, slot);
int res = ota_tftp_download(TFTP_IMAGE_SERVER, TFTP_PORT+1, TFTP_IMAGE_FILENAME1, 1000, slot);
printf("ota_tftp_download %s result %d\n", TFTP_IMAGE_FILENAME1, res);
if (res != 0) {
return;
}
printf("Looks valid, calculating SHA256...\n");
uint32_t length;
bool valid = rboot_verify_image(conf->roms[slot], &length, NULL);
static mbedtls_sha256_context ctx;
mbedtls_sha256_init(&ctx);
mbedtls_sha256_starts(&ctx, 0);
valid = valid && rboot_digest_image(conf->roms[slot], length, (rboot_digest_update_fn)mbedtls_sha256_update, &ctx);
static uint8_t hash_result[32];
mbedtls_sha256_finish(&ctx, hash_result);
mbedtls_sha256_free(&ctx);
if(!valid)
{
printf("Not valid after all :(\n");
return;
}
printf("Image SHA256 = ");
valid = true;
for(int i = 0; i < sizeof(hash_result); i++) {
char hexbuf[3];
snprintf(hexbuf, 3, "%02x", hash_result[i]);
printf(hexbuf);
if(strncmp(hexbuf, FIRMWARE1_SHA256+i*2, 2))
valid = false;
}
printf("\n");
if(!valid) {
printf("Downloaded image SHA256 didn't match expected '%s'\n", FIRMWARE1_SHA256);
return;
}
printf("SHA256 Matches. Rebooting into slot %d...\n", slot);
rboot_set_current_rom(slot);
sdk_system_restart();
}
/* Much simpler function that just downloads a file via TFTP into an rboot slot.
(
*/
static void tftpclient_download_file2(int slot)
{
printf("Downloading %s to slot %d...\n", TFTP_IMAGE_FILENAME2, slot);
int res = ota_tftp_download(TFTP_IMAGE_SERVER, TFTP_PORT+1, TFTP_IMAGE_FILENAME2, 1000, slot);
printf("ota_tftp_download %s result %d\n", TFTP_IMAGE_FILENAME2, res);
}
void tftp_client_task(void *pvParameters)
{
printf("TFTP client task starting...\n");
@ -43,53 +108,10 @@ void tftp_client_task(void *pvParameters)
Note: example will reboot into FILENAME1 if it is successfully downloaded, but FILENAME2 is ignored.
*/
while(1) {
printf("Downloading %s to slot %d...\n", TFTP_IMAGE_FILENAME1, slot);
int res = ota_tftp_download(TFTP_IMAGE_SERVER, TFTP_PORT, TFTP_IMAGE_FILENAME1, 1000, slot);
printf("ota_tftp_download %s result %d\n", TFTP_IMAGE_FILENAME1, res);
if(res == 0) {
printf("Looks valid, calculating SHA256...\n");
uint32_t length;
bool valid = rboot_verify_image(conf.roms[slot], &length, NULL);
static mbedtls_sha256_context ctx;
mbedtls_sha256_init(&ctx);
mbedtls_sha256_starts(&ctx, 0);
valid = valid && rboot_digest_image(conf.roms[slot], length, (rboot_digest_update_fn)mbedtls_sha256_update, &ctx);
static uint8_t hash_result[32];
mbedtls_sha256_finish(&ctx, hash_result);
mbedtls_sha256_free(&ctx);
if(!valid)
{
printf("Not valid after all :(\n");
}
else
{
printf("Image SHA256 = ");
bool valid = true;
for(int i = 0; i < sizeof(hash_result); i++) {
char hexbuf[3];
snprintf(hexbuf, 3, "%02x", hash_result[i]);
printf(hexbuf);
if(strncmp(hexbuf, FIRMWARE1_SHA256+i*2, 2))
valid = false;
}
printf("\n");
if (valid) {
printf("SHA256 Matches. Rebooting into slot %d...\n", slot);
rboot_set_current_rom(slot);
sdk_system_restart();
}
else {
printf("Downloaded image SHA256 didn't match expected '%s'\n", FIRMWARE1_SHA256);
}
}
}
tftpclient_download_and_verify_file1(slot, &conf);
vTaskDelay(5000 / portTICK_RATE_MS);
printf("Downloading %s to slot %d...\n", TFTP_IMAGE_FILENAME2, slot);
res = ota_tftp_download(TFTP_IMAGE_SERVER, TFTP_PORT, TFTP_IMAGE_FILENAME2, 1000, slot);
printf("ota_tftp_download %s result %d\n", TFTP_IMAGE_FILENAME2, res);
tftpclient_download_file2(slot);
vTaskDelay(5000 / portTICK_RATE_MS);
}
}
@ -114,6 +136,7 @@ void user_init(void)
sdk_wifi_set_opmode(STATION_MODE);
sdk_wifi_station_set_config(&config);
printf("Starting TFTP server...");
ota_tftp_init_server(TFTP_PORT);
xTaskCreate(&tftp_client_task, (signed char *)"tftp_client", 2048, NULL, 2, NULL);
}