mgmt: hawkbit: resume firmware downloads

save download progress, to resume failed
firmware downloads.

Signed-off-by: Fin Maaß <f.maass@vogl-electronic.com>

samples/subsys/mgmt/hawkbit/sample.yaml

@@ -34,3 +34,7 @@ tests:
   sample.net.hawkbit.set_settings_runtime:
     extra_configs:
       - CONFIG_HAWKBIT_SET_SETTINGS_RUNTIME=y
+  sample.net.hawkbit.save_progress:
+    extra_configs:
+      - CONFIG_HAWKBIT_SAVE_PROGRESS=y
+      - CONFIG_STREAM_FLASH_PROGRESS=y

subsys/mgmt/hawkbit/Kconfig

@@ -188,6 +188,17 @@ config HAWKBIT_EVENT_CALLBACKS
 	help
 	  Be able to set event callbacks for hawkBit.
 
+config HAWKBIT_SAVE_PROGRESS
+	bool "Save the hawkBit update download progress"
+	depends on STREAM_FLASH_PROGRESS
+	help
+	  Regularly save progress of hawkBit update download operation.
+	  When enabled, the download progress is periodically saved to
+	  non-volatile storage. If a download is interrupted, it can be resumed from
+	  the last saved point rather than starting over, saving bandwidth and time.
+	  This is especially useful for large updates over unreliable networks or in
+	  resource-constrained environments.
+
 module = HAWKBIT
 module-str = Log Level for hawkbit
 module-help = Enables logging for hawkBit code.

subsys/mgmt/hawkbit/hawkbit.c

@@ -44,6 +44,7 @@ LOG_MODULE_REGISTER(hawkbit, CONFIG_HAWKBIT_LOG_LEVEL);
 #define SHA256_HASH_SIZE 32
 #define RESPONSE_BUFFER_SIZE 1100
 #define DDI_SECURITY_TOKEN_SIZE 32
+#define RANGE_HEADER_SIZE 50
 #define HAWKBIT_RECV_TIMEOUT (300 * MSEC_PER_SEC)
 #define HAWKBIT_SET_SERVER_TIMEOUT K_MSEC(300)
 
@@ -115,8 +116,6 @@ static struct hawkbit_config {
 #endif /* CONFIG_HAWKBIT_USE_DYNAMIC_CERT_TAG */
 
 struct hawkbit_download {
-	int download_status;
-	int download_progress;
 	size_t downloaded_size;
 	size_t http_content_size;
 	uint8_t file_hash[SHA256_HASH_SIZE];
@@ -343,6 +342,13 @@ static int hawkbit_settings_set(const char *name, size_t len, settings_read_cb r
 		return 0;
 	}
 #endif /* CONFIG_HAWKBIT_SET_SETTINGS_RUNTIME */
+	/* This is to omit the error message, as that is fetched in stream_flash_progress_load()
+	 * and we don't need to get it here.
+	 */
+	if (IS_ENABLED(CONFIG_HAWKBIT_SAVE_PROGRESS) &&
+	    settings_name_steq(name, "flash_progress", NULL)) {
+		return 0;
+	}
 
 	return -ENOENT;
 }
@@ -864,26 +870,13 @@ int hawkbit_init(void)
 	return ret;
 }
 
-static void response_cb(struct http_response *rsp, enum http_final_call final_data, void *userdata)
+static void response_json_cb(struct http_response *rsp, enum http_final_call final_data,
+			     struct hawkbit_context *hb_context)
 {
-	struct hawkbit_context *hb_context = userdata;
 	size_t body_len;
-	int ret, downloaded;
+	int ret;
 	uint8_t *body_data = NULL, *rsp_tmp = NULL;
 
-	if (rsp->http_status_code != 200) {
-		LOG_ERR("HTTP request denied: %d", rsp->http_status_code);
-		if (rsp->http_status_code == 401 || rsp->http_status_code == 403) {
-			hb_context->code_status = HAWKBIT_PERMISSION_ERROR;
-		} else {
-			hb_context->code_status = HAWKBIT_METADATA_ERROR;
-		}
-		return;
-	}
-
-	switch (hb_context->type) {
-	case HAWKBIT_PROBE:
-	case HAWKBIT_PROBE_DEPLOYMENT_BASE:
 	if (hb_context->dl.http_content_size == 0) {
 		hb_context->dl.http_content_size = rsp->content_length;
 	}
@@ -901,7 +894,7 @@ static void response_cb(struct http_response *rsp, enum http_final_call final_da
 			if (rsp_tmp == NULL) {
 				LOG_ERR("Failed to realloc memory");
 				hb_context->code_status = HAWKBIT_ALLOC_ERROR;
-					break;
+				return;
 			}
 
 			hb_context->response_data = rsp_tmp;
@@ -917,7 +910,7 @@ static void response_cb(struct http_response *rsp, enum http_final_call final_da
 				hb_context->dl.http_content_size,
 				hb_context->dl.downloaded_size);
 			hb_context->code_status = HAWKBIT_METADATA_ERROR;
-				break;
+			return;
 		}
 
 		hb_context->response_data[hb_context->dl.downloaded_size] = '\0';
@@ -942,12 +935,22 @@ static void response_cb(struct http_response *rsp, enum http_final_call final_da
 			}
 		}
 	}
+}
 
-		break;
+static void response_download_cb(struct http_response *rsp, enum http_final_call final_data,
+				 struct hawkbit_context *hb_context)
+{
+	size_t body_len;
+	int ret, downloaded;
+	uint8_t *body_data = NULL;
+	static uint8_t download_progress;
 
-	case HAWKBIT_DOWNLOAD:
 	if (hb_context->dl.http_content_size == 0) {
 		hb_context->dl.http_content_size = rsp->content_length;
+		download_progress = 0;
+		if (IS_ENABLED(CONFIG_HAWKBIT_SAVE_PROGRESS) && rsp->http_status_code != 206) {
+			hb_context->flash_ctx.stream.bytes_written = 0;
+		}
 	}
 
 	if (rsp->body_found) {
@@ -959,28 +962,54 @@ static void response_cb(struct http_response *rsp, enum http_final_call final_da
 		if (ret < 0) {
 			LOG_ERR("Failed to write flash: %d", ret);
 			hb_context->code_status = HAWKBIT_DOWNLOAD_ERROR;
-				break;
+			return;
 		}
+
+#ifdef CONFIG_HAWKBIT_SAVE_PROGRESS
+		stream_flash_progress_save(&hb_context->flash_ctx.stream, "hawkbit/flash_progress");
+#endif
 	}
 
 	hb_context->dl.downloaded_size = flash_img_bytes_written(&hb_context->flash_ctx);
 
-		downloaded =
-			hb_context->dl.downloaded_size * 100 / hb_context->dl.http_content_size;
+	downloaded = hb_context->dl.downloaded_size * 100 / hb_context->dl.file_size;
 
-		if (downloaded > hb_context->dl.download_progress) {
-			hb_context->dl.download_progress = downloaded;
-			LOG_DBG("Downloaded: %d%% ", hb_context->dl.download_progress);
+	if (downloaded != download_progress) {
+		download_progress = downloaded;
+		LOG_DBG("Downloaded: %u%% (%u / %u)", download_progress,
+			hb_context->dl.downloaded_size, hb_context->dl.file_size);
 	}
 
 	if (final_data == HTTP_DATA_FINAL) {
 		hb_context->final_data_received = true;
 	}
+}
+
+static void response_cb(struct http_response *rsp, enum http_final_call final_data, void *userdata)
+{
+	struct hawkbit_context *hb_context = userdata;
+
+	if (!IN_RANGE(rsp->http_status_code, 200, 299)) {
+		LOG_ERR("HTTP request denied: %d", rsp->http_status_code);
+		if (rsp->http_status_code == 401 || rsp->http_status_code == 403) {
+			hb_context->code_status = HAWKBIT_PERMISSION_ERROR;
+		} else {
+			hb_context->code_status = HAWKBIT_METADATA_ERROR;
+		}
+		return;
+	}
 
+	switch (hb_context->type) {
+	case HAWKBIT_PROBE:
+	case HAWKBIT_PROBE_DEPLOYMENT_BASE:
+		response_json_cb(rsp, final_data, hb_context);
 		break;
 
-	default:
+	case HAWKBIT_DOWNLOAD:
+		response_download_cb(rsp, final_data, hb_context);
+		break;
 
+	default:
 		break;
 	}
 }
@@ -1055,6 +1084,13 @@ static bool send_request(struct hawkbit_context *hb_context, enum hawkbit_http_r
 		 * Resource for software module (Deployment Base)
 		 * GET: /{tenant}/controller/v1/{controllerId}/deploymentBase/{actionId}
 		 */
+
+		http_req.method = HTTP_GET;
+		hb_context->dl.http_content_size = 0;
+		hb_context->dl.downloaded_size = 0;
+
+		break;
+
 	case HAWKBIT_DOWNLOAD:
 		/*
 		 * Resource for software module (Deployment Base)
@@ -1063,7 +1099,23 @@ static bool send_request(struct hawkbit_context *hb_context, enum hawkbit_http_r
 		 */
 		http_req.method = HTTP_GET;
 		hb_context->dl.http_content_size = 0;
+
+#ifdef CONFIG_HAWKBIT_SAVE_PROGRESS
+		hb_context->dl.downloaded_size = flash_img_bytes_written(&hb_context->flash_ctx);
+		if (IN_RANGE(hb_context->dl.downloaded_size, 1, hb_context->dl.file_size)) {
+			char header_range[RANGE_HEADER_SIZE] = {0};
+
+			snprintf(header_range, sizeof(header_range), "Range: bytes=%u-" HTTP_CRLF,
+				 hb_context->dl.downloaded_size);
+			const char *const headers_range[] = {header_range, NULL};
+
+			http_req.optional_headers = (const char **)headers_range;
+			LOG_DBG("optional header: %s", header_range);
+			LOG_INF("Resuming download from %d bytes", hb_context->dl.downloaded_size);
+		}
+#else
 		hb_context->dl.downloaded_size = 0;
+#endif
 
 		break;
 
@@ -1459,6 +1511,10 @@ static void s_download(void *o)
 	 */
 	flash_area_ptr = s->hb_context.flash_ctx.flash_area;
 
+#ifdef CONFIG_HAWKBIT_SAVE_PROGRESS
+	stream_flash_progress_load(&s->hb_context.flash_ctx.stream, "hawkbit/flash_progress");
+#endif
+
 	if (!send_request(&s->hb_context, HAWKBIT_DOWNLOAD, url_buffer, NULL)) {
 		LOG_ERR("Send request failed (%s)", "HAWKBIT_DOWNLOAD");
 		smf_set_state(SMF_CTX(s), &hawkbit_states[S_HAWKBIT_TERMINATE]);
@@ -1473,6 +1529,10 @@ static void s_download(void *o)
 		return;
 	}
 
+#ifdef CONFIG_HAWKBIT_SAVE_PROGRESS
+	stream_flash_progress_clear(&s->hb_context.flash_ctx.stream, "hawkbit/flash_progress");
+#endif
+
 	/* Verify the hash of the stored firmware */
 	fic.match = s->hb_context.dl.file_hash;
 	fic.clen = s->hb_context.dl.downloaded_size;