Import of the watch repository from Pebble

src/fw/services/common/comm_session/meta_endpoint.c

@@ -0,0 +1,58 @@
+/*
+ * 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 "meta_endpoint.h"
+
+#include "kernel/pbl_malloc.h"
+#include "services/common/system_task.h"
+#include "system/logging.h"
+#include "util/net.h"
+
+static const uint16_t META_ENDPOINT_ID = 0;
+
+static void prv_send_meta_response_kernelbg_cb(void *data) {
+  MetaResponseInfo *meta_response_info_heap_copy = data;
+
+  // Swap endpoint_id bytes to be Big-Endian:
+  meta_response_info_heap_copy->payload.endpoint_id =
+          htons(meta_response_info_heap_copy->payload.endpoint_id);
+
+  uint16_t payload_size;
+  if (meta_response_info_heap_copy->payload.error_code == MetaResponseCodeCorruptedMessage) {
+    payload_size = sizeof(meta_response_info_heap_copy->payload.error_code);
+  } else {
+    payload_size = sizeof(meta_response_info_heap_copy->payload);
+  }
+
+  comm_session_send_data(meta_response_info_heap_copy->session, META_ENDPOINT_ID,
+                         (const uint8_t *)&meta_response_info_heap_copy->payload,
+                         payload_size, COMM_SESSION_DEFAULT_TIMEOUT);
+
+  kernel_free(meta_response_info_heap_copy);
+}
+
+void meta_endpoint_send_response_async(const MetaResponseInfo *meta_response_info) {
+  PBL_LOG(LOG_LEVEL_ERROR, "Meta protocol error: 0x%x (endpoint=%u)",
+          meta_response_info->payload.error_code, meta_response_info->payload.endpoint_id);
+
+  MetaResponseInfo *meta_response_info_heap_copy = kernel_zalloc_check(sizeof(*meta_response_info));
+  memcpy(meta_response_info_heap_copy, meta_response_info, sizeof(*meta_response_info));
+  system_task_add_callback(prv_send_meta_response_kernelbg_cb, meta_response_info_heap_copy);
+}
+
+void meta_protocol_msg_callback(CommSession *session, const uint8_t* data, size_t length) {
+  PBL_LOG(LOG_LEVEL_INFO, "Meta endpoint callback called");
+}