Import of the watch repository from Pebble

src/fw/services/normal/app_order_endpoint.c

@@ -0,0 +1,101 @@
+/*
+ * Copyright 2024 Google LLC
+ *
+ * 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 "process_management/app_install_manager_private.h"
+#include "process_management/app_order_storage.h"
+#include "services/common/comm_session/session.h"
+#include "system/hexdump.h"
+#include "system/logging.h"
+#include "system/passert.h"
+#include "system/status_codes.h"
+#include "util/uuid.h"
+
+#include <stdbool.h>
+#include <string.h>
+
+//! @file app_order_endpoint.c
+//! App Order Endpoint
+//!
+//! There is only 1 way to use this endpoint
+
+//! \code{.c}
+//! 0x01 <uint8_t num_uuids>
+//! <16-byte UUID_1>
+//! ...
+//! <16-byte UUID_N>
+//! \endcode
+
+//! AppOrder Endpoint ID
+static const uint16_t APP_ORDER_ENDPOINT_ID = 0xabcd;
+
+typedef enum {
+  APP_ORDER_CMD = 0x01,
+} AppOrderCommand;
+
+typedef enum {
+  APP_ORDER_RES_SUCCESS = 0x01,
+  APP_ORDER_RES_FAILURE = 0x02,
+  APP_ORDER_RES_INVALID = 0x03,
+  APP_ORDER_RES_RETRY_LATER = 0x04,
+} AppOrderResponse;
+
+typedef struct {
+  CommSession *session;
+  uint8_t result;
+} ResponseInfo;
+
+static void prv_send_result(CommSession *session, uint8_t result) {
+  PBL_LOG(LOG_LEVEL_DEBUG, "Sending result of %d", result);
+  comm_session_send_data(session, APP_ORDER_ENDPOINT_ID, (uint8_t*)&result, sizeof(result),
+                         COMM_SESSION_DEFAULT_TIMEOUT);
+}
+
+static void prv_handle_app_order_msg(CommSession *session, const uint8_t *data, uint32_t length) {
+  // call write order function, then fire an event for app install manager to tell the launcher
+  // to throw everything away or at least don't overwrite the data please.
+  uint8_t num_uuids = data[0];
+
+  if (num_uuids != (length / UUID_SIZE)) {
+    PBL_LOG(LOG_LEVEL_DEBUG, "invalid length, num_uuids does not match with the length of message");
+    prv_send_result(session, APP_ORDER_RES_INVALID);
+  }
+
+  write_uuid_list_to_file((const Uuid *)&data[1], num_uuids);
+  prv_send_result(session, APP_ORDER_RES_SUCCESS);
+}
+
+void app_order_protocol_msg_callback(CommSession *session, const uint8_t* data, size_t length) {
+  // header includes APP_ORDER_CMD and a num_uuids uint8_t
+  const uint8_t header_len = sizeof(AppOrderCommand) + sizeof(uint8_t);
+
+  // Ensure it is a valid message. There is a list of UUID's after the header.
+  if ((length % UUID_SIZE) != header_len) {
+    PBL_LOG(LOG_LEVEL_DEBUG, "invalid length, (length - header_len) not multiple of 16");
+    prv_send_result(session, APP_ORDER_RES_INVALID);
+    return;
+  }
+
+  switch (data[0]) {
+    case APP_ORDER_CMD:
+      PBL_LOG(LOG_LEVEL_DEBUG, "Got APP_ORDER message");
+      prv_handle_app_order_msg(session, &data[1], length - 1);
+      break;
+    default:
+      PBL_LOG(LOG_LEVEL_ERROR, "Invalid message received, first byte is %u", data[0]);
+      prv_send_result(session, APP_ORDER_RES_FAILURE);
+      break;
+  }
+}