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// Copyright 2016 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "remoting/protocol/stream_message_pipe_adapter.h"
#include <memory>
#include <utility>
#include "base/functional/bind.h"
#include "net/base/net_errors.h"
#include "net/traffic_annotation/network_traffic_annotation.h"
#include "remoting/base/buffered_socket_writer.h"
#include "remoting/base/compound_buffer.h"
#include "remoting/protocol/message_serialization.h"
#include "remoting/protocol/p2p_stream_socket.h"
#include "remoting/protocol/stream_channel_factory.h"
namespace remoting::protocol {
StreamMessagePipeAdapter::StreamMessagePipeAdapter(
std::unique_ptr<P2PStreamSocket> socket,
ErrorCallback error_callback)
: socket_(std::move(socket)), error_callback_(std::move(error_callback)) {
DCHECK(socket_);
DCHECK(error_callback_);
}
StreamMessagePipeAdapter::~StreamMessagePipeAdapter() = default;
void StreamMessagePipeAdapter::Start(EventHandler* event_handler) {
DCHECK(event_handler);
event_handler_ = event_handler;
writer_ = std::make_unique<BufferedSocketWriter>();
writer_->Start(base::BindRepeating(&P2PStreamSocket::Write,
base::Unretained(socket_.get())),
base::BindOnce(&StreamMessagePipeAdapter::CloseOnError,
base::Unretained(this)));
reader_ = std::make_unique<MessageReader>();
reader_->StartReading(socket_.get(),
base::BindRepeating(&EventHandler::OnMessageReceived,
base::Unretained(event_handler_)),
base::BindOnce(&StreamMessagePipeAdapter::CloseOnError,
base::Unretained(this)));
event_handler_->OnMessagePipeOpen();
}
void StreamMessagePipeAdapter::Send(google::protobuf::MessageLite* message,
base::OnceClosure done) {
net::NetworkTrafficAnnotationTag traffic_annotation =
net::DefineNetworkTrafficAnnotation("stream_message_pipe_adapter", R"(
semantics {
sender: "Chrome Remote Desktop"
description: "Chrome Remote Desktop P2P channel."
trigger: "Initiating a Chrome Remote Desktop connection."
data:
"Chrome Remote Desktop session data, including video and input "
"events."
destination: OTHER
destination_other:
"The Chrome Remote Desktop client/host that user is connecting to."
}
policy {
cookies_allowed: NO
setting:
"This request cannot be stopped in settings, but will not be sent "
"if user does not use Chrome Remote Desktop."
policy_exception_justification:
"Not implemented. 'RemoteAccessHostClientDomainList' and "
"'RemoteAccessHostDomainList' policies can limit the domains to "
"which a connection can be made, but they cannot be used to block "
"the request to all domains. Please refer to help desk for other "
"approaches to manage this feature."
})");
if (writer_) {
writer_->Write(SerializeAndFrameMessage(*message), std::move(done),
traffic_annotation);
}
}
void StreamMessagePipeAdapter::CloseOnError(int error) {
// Stop reading and writing on error.
writer_.reset();
reader_.reset();
if (error == 0) {
event_handler_->OnMessagePipeClosed();
} else if (error_callback_) {
std::move(error_callback_).Run(error);
}
}
StreamMessageChannelFactoryAdapter::StreamMessageChannelFactoryAdapter(
StreamChannelFactory* stream_channel_factory,
const ErrorCallback& error_callback)
: stream_channel_factory_(stream_channel_factory),
error_callback_(error_callback) {}
StreamMessageChannelFactoryAdapter::~StreamMessageChannelFactoryAdapter() =
default;
void StreamMessageChannelFactoryAdapter::CreateChannel(
const std::string& name,
ChannelCreatedCallback callback) {
stream_channel_factory_->CreateChannel(
name,
base::BindOnce(&StreamMessageChannelFactoryAdapter::OnChannelCreated,
base::Unretained(this), std::move(callback)));
}
void StreamMessageChannelFactoryAdapter::CancelChannelCreation(
const std::string& name) {
stream_channel_factory_->CancelChannelCreation(name);
}
void StreamMessageChannelFactoryAdapter::OnChannelCreated(
ChannelCreatedCallback callback,
std::unique_ptr<P2PStreamSocket> socket) {
if (!socket) {
error_callback_.Run(net::ERR_FAILED);
return;
}
std::move(callback).Run(std::make_unique<StreamMessagePipeAdapter>(
std::move(socket), error_callback_));
}
} // namespace remoting::protocol
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