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// Copyright (c) 2012 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.
//
// This file implements the Windows service controlling Me2Me host processes
// running within user sessions.
#include "remoting/host/desktop_process.h"
#include <utility>
#include "base/bind.h"
#include "base/bind_helpers.h"
#include "base/debug/alias.h"
#include "base/logging.h"
#include "base/memory/ref_counted.h"
#include "base/message_loop/message_loop.h"
#include "base/strings/string_util.h"
#include "build/build_config.h"
#include "ipc/attachment_broker_unprivileged.h"
#include "ipc/ipc_channel_proxy.h"
#include "remoting/base/auto_thread.h"
#include "remoting/base/auto_thread_task_runner.h"
#include "remoting/host/chromoting_messages.h"
#include "remoting/host/desktop_environment.h"
#include "remoting/host/desktop_session_agent.h"
namespace remoting {
DesktopProcess::DesktopProcess(
scoped_refptr<AutoThreadTaskRunner> caller_task_runner,
scoped_refptr<AutoThreadTaskRunner> input_task_runner,
const std::string& daemon_channel_name)
: caller_task_runner_(caller_task_runner),
input_task_runner_(input_task_runner),
daemon_channel_name_(daemon_channel_name) {
DCHECK(caller_task_runner_->BelongsToCurrentThread());
DCHECK(base::MessageLoopForUI::IsCurrent());
}
DesktopProcess::~DesktopProcess() {
DCHECK(!daemon_channel_);
DCHECK(!desktop_agent_.get());
}
DesktopEnvironmentFactory& DesktopProcess::desktop_environment_factory() {
DCHECK(caller_task_runner_->BelongsToCurrentThread());
return *desktop_environment_factory_;
}
void DesktopProcess::OnNetworkProcessDisconnected() {
DCHECK(caller_task_runner_->BelongsToCurrentThread());
OnChannelError();
}
void DesktopProcess::InjectSas() {
DCHECK(caller_task_runner_->BelongsToCurrentThread());
daemon_channel_->Send(new ChromotingDesktopDaemonMsg_InjectSas());
}
bool DesktopProcess::OnMessageReceived(const IPC::Message& message) {
DCHECK(caller_task_runner_->BelongsToCurrentThread());
bool handled = true;
IPC_BEGIN_MESSAGE_MAP(DesktopProcess, message)
IPC_MESSAGE_HANDLER(ChromotingDaemonMsg_Crash, OnCrash)
IPC_MESSAGE_UNHANDLED(handled = false)
IPC_END_MESSAGE_MAP()
CHECK(handled) << "Received unexpected IPC type: " << message.type();
return handled;
}
void DesktopProcess::OnChannelConnected(int32_t peer_pid) {
DCHECK(caller_task_runner_->BelongsToCurrentThread());
VLOG(1) << "IPC: desktop <- daemon (" << peer_pid << ")";
}
void DesktopProcess::OnChannelError() {
// Shutdown the desktop process.
IPC::AttachmentBroker* broker = IPC::AttachmentBroker::GetGlobal();
if (broker && !broker->IsPrivilegedBroker())
broker->DeregisterBrokerCommunicationChannel(daemon_channel_.get());
daemon_channel_.reset();
if (desktop_agent_.get()) {
desktop_agent_->Stop();
desktop_agent_ = nullptr;
}
caller_task_runner_ = nullptr;
input_task_runner_ = nullptr;
desktop_environment_factory_.reset();
}
bool DesktopProcess::Start(
scoped_ptr<DesktopEnvironmentFactory> desktop_environment_factory) {
DCHECK(caller_task_runner_->BelongsToCurrentThread());
DCHECK(!desktop_environment_factory_);
DCHECK(desktop_environment_factory);
desktop_environment_factory_ = std::move(desktop_environment_factory);
// Launch the audio capturing thread.
scoped_refptr<AutoThreadTaskRunner> audio_task_runner;
#if defined(OS_WIN)
// On Windows the AudioCapturer requires COM, so we run a single-threaded
// apartment, which requires a UI thread.
audio_task_runner =
AutoThread::CreateWithLoopAndComInitTypes("ChromotingAudioThread",
caller_task_runner_,
base::MessageLoop::TYPE_UI,
AutoThread::COM_INIT_STA);
#else // !defined(OS_WIN)
audio_task_runner = AutoThread::CreateWithType(
"ChromotingAudioThread", caller_task_runner_, base::MessageLoop::TYPE_IO);
#endif // !defined(OS_WIN)
// Launch the I/O thread.
scoped_refptr<AutoThreadTaskRunner> io_task_runner =
AutoThread::CreateWithType(
"I/O thread", caller_task_runner_, base::MessageLoop::TYPE_IO);
// Create a desktop agent.
desktop_agent_ =
new DesktopSessionAgent(audio_task_runner, caller_task_runner_,
input_task_runner_, io_task_runner);
// Start the agent and create an IPC channel to talk to it.
IPC::PlatformFileForTransit desktop_pipe;
if (!desktop_agent_->Start(AsWeakPtr(), &desktop_pipe)) {
desktop_agent_ = nullptr;
caller_task_runner_ = nullptr;
input_task_runner_ = nullptr;
desktop_environment_factory_.reset();
return false;
}
// Connect to the daemon.
daemon_channel_ =
IPC::ChannelProxy::Create(daemon_channel_name_, IPC::Channel::MODE_CLIENT,
this, io_task_runner.get());
IPC::AttachmentBrokerUnprivileged::CreateBrokerIfNeeded();
IPC::AttachmentBroker* broker = IPC::AttachmentBroker::GetGlobal();
if (broker && !broker->IsPrivilegedBroker())
broker->RegisterBrokerCommunicationChannel(daemon_channel_.get());
// Pass |desktop_pipe| to the daemon.
daemon_channel_->Send(
new ChromotingDesktopDaemonMsg_DesktopAttached(desktop_pipe));
return true;
}
void DesktopProcess::OnCrash(const std::string& function_name,
const std::string& file_name,
const int& line_number) {
char message[1024];
base::snprintf(message, sizeof(message),
"Requested by %s at %s, line %d.",
function_name.c_str(), file_name.c_str(), line_number);
base::debug::Alias(message);
// The daemon requested us to crash the process.
CHECK(false) << message;
}
} // namespace remoting
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