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// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chromeos/ash/components/drivefs/drivefs_bootstrap.h"
#include <utility>
#include "base/functional/bind.h"
#include "chromeos/ash/components/drivefs/mojom/drivefs.mojom.h"
#include "chromeos/components/mojo_bootstrap/pending_connection_manager.h"
#include "mojo/core/configuration.h"
#include "mojo/public/cpp/bindings/receiver.h"
#include "mojo/public/cpp/bindings/remote.h"
#include "mojo/public/cpp/platform/platform_channel_endpoint.h"
#include "mojo/public/cpp/system/invitation.h"
namespace drivefs {
DriveFsBootstrapListener::DriveFsBootstrapListener()
: bootstrap_(invitation_.AttachMessagePipe("drivefs-bootstrap"),
mojom::DriveFsBootstrap::Version_),
pending_token_(base::UnguessableToken::Create()) {
mojo_bootstrap::PendingConnectionManager::Get().ExpectOpenIpcChannel(
pending_token_,
base::BindOnce(&DriveFsBootstrapListener::AcceptMojoConnection,
base::Unretained(this)));
}
DriveFsBootstrapListener::~DriveFsBootstrapListener() {
if (pending_token_) {
mojo_bootstrap::PendingConnectionManager::Get()
.CancelExpectedOpenIpcChannel(pending_token_);
pending_token_ = {};
}
}
mojo::PendingRemote<mojom::DriveFsBootstrap>
DriveFsBootstrapListener::bootstrap() {
return std::move(bootstrap_);
}
void DriveFsBootstrapListener::AcceptMojoConnection(base::ScopedFD handle) {
DCHECK(pending_token_);
pending_token_ = {};
connected_ = true;
SendInvitationOverPipe(std::move(handle));
}
void DriveFsBootstrapListener::SendInvitationOverPipe(base::ScopedFD handle) {
if (!mojo::core::GetConfiguration().is_broker_process) {
invitation_.set_extra_flags(MOJO_SEND_INVITATION_FLAG_SHARE_BROKER);
}
mojo::OutgoingInvitation::Send(
std::move(invitation_), base::kNullProcessHandle,
mojo::PlatformChannelEndpoint(mojo::PlatformHandle(std::move(handle))));
}
class DriveFsConnectionImpl : public DriveFsConnection {
public:
DriveFsConnectionImpl(
std::unique_ptr<DriveFsBootstrapListener> bootstrap_listener,
mojom::DriveFsConfigurationPtr config)
: bootstrap_listener_(std::move(bootstrap_listener)),
config_(std::move(config)) {}
DriveFsConnectionImpl(const DriveFsConnectionImpl&) = delete;
DriveFsConnectionImpl& operator=(const DriveFsConnectionImpl&) = delete;
~DriveFsConnectionImpl() override = default;
base::UnguessableToken Connect(mojom::DriveFsDelegate* delegate,
base::OnceClosure on_disconnected) override {
delegate_receiver_ =
std::make_unique<mojo::Receiver<mojom::DriveFsDelegate>>(delegate);
on_disconnected_ = std::move(on_disconnected);
auto bootstrap =
mojo::Remote<mojom::DriveFsBootstrap>(bootstrap_listener_->bootstrap());
auto token = bootstrap_listener_->pending_token();
bootstrap->Init(std::move(config_), drivefs_.BindNewPipeAndPassReceiver(),
delegate_receiver_->BindNewPipeAndPassRemote());
delegate_receiver_->set_disconnect_handler(base::BindOnce(
&DriveFsConnectionImpl::OnMojoConnectionError, base::Unretained(this)));
drivefs_.set_disconnect_handler(base::BindOnce(
&DriveFsConnectionImpl::OnMojoConnectionError, base::Unretained(this)));
return token;
}
mojom::DriveFs& GetDriveFs() override {
CHECK(drivefs_);
return *drivefs_;
}
private:
void OnMojoConnectionError() {
if (on_disconnected_ && bootstrap_listener_->is_connected()) {
std::move(on_disconnected_).Run();
}
}
const std::unique_ptr<DriveFsBootstrapListener> bootstrap_listener_;
mojom::DriveFsConfigurationPtr config_;
std::unique_ptr<mojo::Receiver<mojom::DriveFsDelegate>> delegate_receiver_;
mojo::Remote<mojom::DriveFs> drivefs_;
base::OnceClosure on_disconnected_;
};
std::unique_ptr<DriveFsConnection> DriveFsConnection::Create(
std::unique_ptr<DriveFsBootstrapListener> bootstrap_listener,
mojom::DriveFsConfigurationPtr config) {
return std::make_unique<DriveFsConnectionImpl>(std::move(bootstrap_listener),
std::move(config));
}
} // namespace drivefs
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