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mojo/public/cpp/bindings/lib/control_message_handler.cc

-// Copyright 2015 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "mojo/public/cpp/bindings/lib/control_message_handler.h"
-
-#include "mojo/public/cpp/bindings/lib/message_builder.h"
-#include "mojo/public/cpp/environment/logging.h"
-#include "mojo/public/interfaces/bindings/interface_control_messages.mojom.h"
-
-namespace mojo {
-namespace internal {
-
-// static
-bool ControlMessageHandler::IsControlMessage(const Message* message) {
-  return !!(message->header()->name & 0x80000000);
-}
-
-ControlMessageHandler::ControlMessageHandler(uint32_t interface_version)
-    : interface_version_(interface_version) {
-}
-
-ControlMessageHandler::~ControlMessageHandler() {
-}
-
-bool ControlMessageHandler::Accept(Message* message) {
-  if (message->header()->name == kRunOrClosePipeMessageId)
-    return RunOrClosePipe(message);
-
-  MOJO_DCHECK(false) << "Bad control message (no response): name = "
-                     << message->header()->name;
-  return false;
-}
-
-bool ControlMessageHandler::AcceptWithResponder(
-    Message* message,
-    MessageReceiverWithStatus* responder) {
-  if (message->header()->name == kRunMessageId)
-    return Run(message, responder);
-
-  MOJO_DCHECK(false) << "Bad control message (with response): name = "
-                     << message->header()->name;
-  return false;
-}
-
-bool ControlMessageHandler::Run(Message* message,
-                                MessageReceiverWithStatus* responder) {
-  RunResponseMessageParamsPtr response_params_ptr(
-      RunResponseMessageParams::New());
-  response_params_ptr->reserved0 = 16u;
-  response_params_ptr->reserved1 = 0u;
-  response_params_ptr->query_version_result = QueryVersionResult::New();
-  response_params_ptr->query_version_result->version = interface_version_;
-
-  size_t size = GetSerializedSize_(*response_params_ptr);
-  ResponseMessageBuilder builder(kRunMessageId, size, message->request_id());
-
-  RunResponseMessageParams_Data* response_params = nullptr;
-  auto result =
-      Serialize_(response_params_ptr.get(), builder.buffer(), &response_params);
-  MOJO_DCHECK(result == ValidationError::NONE);
-
-  response_params->EncodePointersAndHandles(
-      builder.message()->mutable_handles());
-  bool ok = responder->Accept(builder.message());
-  MOJO_ALLOW_UNUSED_LOCAL(ok);
-  delete responder;
-
-  return true;
-}
-
-bool ControlMessageHandler::RunOrClosePipe(Message* message) {
-  RunOrClosePipeMessageParams_Data* params =
-      reinterpret_cast<RunOrClosePipeMessageParams_Data*>(
-          message->mutable_payload());
-  params->DecodePointersAndHandles(message->mutable_handles());
-
-  RunOrClosePipeMessageParamsPtr params_ptr(RunOrClosePipeMessageParams::New());
-  Deserialize_(params, params_ptr.get());
-
-  return interface_version_ >= params_ptr->require_version->version;
-}
-
-}  // namespace internal
-}  // namespace mojo