// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/ash/dbus/mojo_connection_service_provider.h"
#include <memory>
#include <utility>
#include "base/files/scoped_file.h"
#include "base/functional/bind.h"
#include "chrome/browser/ash/net/rollback_network_config/rollback_network_config_service.h"
#include "chromeos/ash/services/rollback_network_config/public/mojom/rollback_network_config.mojom.h"
#include "dbus/bus.h"
#include "dbus/message.h"
#include "mojo/public/cpp/bindings/remote.h"
#include "mojo/public/cpp/platform/platform_channel.h"
#include "mojo/public/cpp/system/invitation.h"
#include "third_party/cros_system_api/dbus/service_constants.h"
namespace ash {
MojoConnectionServiceProvider::MojoConnectionServiceProvider() {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
}
MojoConnectionServiceProvider::~MojoConnectionServiceProvider() {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
}
void MojoConnectionServiceProvider::Start(
scoped_refptr<dbus::ExportedObject> exported_object) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
exported_object_ = exported_object;
exported_object_->ExportMethod(
::mojo_connection_service::kMojoConnectionServiceInterface,
::mojo_connection_service::
kBootstrapMojoConnectionForRollbackNetworkConfigMethod,
base::BindRepeating(&MojoConnectionServiceProvider::
BootstrapMojoConnectionForRollbackNetworkConfig,
weak_ptr_factory_.GetWeakPtr()),
base::BindOnce(&MojoConnectionServiceProvider::OnExported,
weak_ptr_factory_.GetWeakPtr()));
}
void MojoConnectionServiceProvider::OnExported(
const std::string& interface_name,
const std::string& method_name,
bool success) {
LOG_IF(ERROR, !success) << "Failed to export " << interface_name << "."
<< method_name;
}
void MojoConnectionServiceProvider::
BootstrapMojoConnectionForRollbackNetworkConfig(
dbus::MethodCall* method_call,
dbus::ExportedObject::ResponseSender response_sender) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
mojo::PlatformChannel platform_channel;
mojo::ScopedMessagePipeHandle pipe;
SendInvitation(&platform_channel, &pipe);
rollback_network_config::BindToInProcessInstance(
mojo::PendingReceiver<
rollback_network_config::mojom::RollbackNetworkConfig>(
std::move(pipe)));
SendResponse(std::move(platform_channel), method_call,
std::move(response_sender));
}
void MojoConnectionServiceProvider::SendInvitation(
mojo::PlatformChannel* platform_channel,
mojo::ScopedMessagePipeHandle* pipe) {
// Prepare a Mojo invitation to send through |platform_channel|.
mojo::OutgoingInvitation invitation;
// Include an initial Mojo pipe in the invitation.
*pipe = invitation.AttachMessagePipe(0);
mojo::OutgoingInvitation::Send(std::move(invitation),
base::kNullProcessHandle,
platform_channel->TakeLocalEndpoint());
}
void MojoConnectionServiceProvider::SendResponse(
mojo::PlatformChannel platform_channel,
dbus::MethodCall* method_call,
dbus::ExportedObject::ResponseSender response_sender) {
base::ScopedFD file_handle =
platform_channel.TakeRemoteEndpoint().TakePlatformHandle().TakeFD();
std::unique_ptr<dbus::Response> response =
dbus::Response::FromMethodCall(method_call);
dbus::MessageWriter writer(response.get());
writer.AppendFileDescriptor(file_handle.get());
std::move(response_sender).Run(std::move(response));
}
} // namespace ash