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// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef REMOTING_HOST_DAEMON_PROCESS_H_
#define REMOTING_HOST_DAEMON_PROCESS_H_
#include <stdint.h>
#include <list>
#include <memory>
#include <string>
#include "base/compiler_specific.h"
#include "base/memory/raw_ptr.h"
#include "base/memory/scoped_refptr.h"
#include "base/process/process.h"
#include "base/time/time.h"
#include "ipc/ipc_message.h"
#include "mojo/public/cpp/bindings/associated_receiver.h"
#include "mojo/public/cpp/bindings/scoped_interface_endpoint_handle.h"
#include "mojo/public/cpp/system/message_pipe.h"
#include "remoting/host/config_watcher.h"
#include "remoting/host/host_status_monitor.h"
#include "remoting/host/host_status_observer.h"
#include "remoting/host/mojom/desktop_session.mojom.h"
#include "remoting/host/worker_process_ipc_delegate.h"
namespace base {
class Location;
} // namespace base
namespace remoting {
class AutoThreadTaskRunner;
class DesktopSession;
class HostEventLogger;
class ScreenResolution;
// This class implements core of the daemon process. It manages the networking
// process running at lower privileges and maintains the list of desktop
// sessions.
class DaemonProcess : public ConfigWatcher::Delegate,
public WorkerProcessIpcDelegate,
public HostStatusObserver,
public mojom::DesktopSessionManager {
public:
typedef std::list<raw_ptr<DesktopSession, CtnExperimental>>
DesktopSessionList;
DaemonProcess(const DaemonProcess&) = delete;
DaemonProcess& operator=(const DaemonProcess&) = delete;
~DaemonProcess() override;
// Creates a platform-specific implementation of the daemon process object
// passing relevant task runners. Public methods of this class must be called
// on the |caller_task_runner| thread. |io_task_runner| is used to handle IPC
// and background I/O tasks.
static std::unique_ptr<DaemonProcess> Create(
scoped_refptr<AutoThreadTaskRunner> caller_task_runner,
scoped_refptr<AutoThreadTaskRunner> io_task_runner,
const base::OnceClosure stopped_callback);
// ConfigWatcher::Delegate
void OnConfigUpdated(const std::string& serialized_config) override;
void OnConfigWatcherError() override;
scoped_refptr<HostStatusMonitor> status_monitor() { return status_monitor_; }
// WorkerProcessIpcDelegate implementation.
void OnChannelConnected(int32_t peer_pid) override;
void OnPermanentError(int exit_code) override;
void OnWorkerProcessStopped() override;
void OnAssociatedInterfaceRequest(
const std::string& interface_name,
mojo::ScopedInterfaceEndpointHandle handle) override;
// mojom::DesktopSessionManager implementation.
void CreateDesktopSession(int terminal_id,
const ScreenResolution& resolution,
bool virtual_terminal) override;
void CloseDesktopSession(int terminal_id) override;
void SetScreenResolution(int terminal_id,
const ScreenResolution& resolution) override;
// Called when a desktop integration process attaches to |terminal_id|.
// |session_id| is the id of the desktop session being attached.
// |desktop_pipe| specifies the client end of the desktop pipe. Returns true
// on success, false otherwise.
virtual bool OnDesktopSessionAgentAttached(
int terminal_id,
int session_id,
mojo::ScopedMessagePipeHandle desktop_pipe) = 0;
// Requests the network process to crash.
void CrashNetworkProcess(const base::Location& location);
protected:
DaemonProcess(scoped_refptr<AutoThreadTaskRunner> caller_task_runner,
scoped_refptr<AutoThreadTaskRunner> io_task_runner,
base::OnceClosure stopped_callback);
// Reads the host configuration and launches the network process.
void Initialize();
// Invokes |stopped_callback_| to ask the owner to delete |this|.
void Stop();
// Returns true if |terminal_id| is in the range of allocated IDs. I.e. it is
// less or equal to the highest ID we have seen so far.
bool WasTerminalIdAllocated(int terminal_id);
// HostStatusObserver overrides.
void OnClientAccessDenied(const std::string& signaling_id) override;
void OnClientAuthenticated(const std::string& signaling_id) override;
void OnClientConnected(const std::string& signaling_id) override;
void OnClientDisconnected(const std::string& signaling_id) override;
void OnClientRouteChange(const std::string& signaling_id,
const std::string& channel_name,
const protocol::TransportRoute& route) override;
void OnHostStarted(const std::string& owner_email) override;
void OnHostShutdown() override;
// Creates a platform-specific desktop session and assigns a unique ID to it.
// An implementation should validate |params| as they are received via IPC.
virtual std::unique_ptr<DesktopSession> DoCreateDesktopSession(
int terminal_id,
const ScreenResolution& resolution,
bool virtual_terminal) = 0;
// Requests the network process to crash.
virtual void DoCrashNetworkProcess(const base::Location& location) = 0;
// Launches the network process and establishes an IPC channel with it.
virtual void LaunchNetworkProcess() = 0;
// Sends |serialized_config| to the network process. The config includes
// details such as the host owner email and robot account refresh token which
// are required to start the host and get online.
virtual void SendHostConfigToNetworkProcess(
const std::string& serialized_config) = 0;
// Notifies the network process that the daemon has disconnected the desktop
// session from the associated desktop environment.
virtual void SendTerminalDisconnected(int terminal_id) = 0;
virtual void StartChromotingHostServices() = 0;
scoped_refptr<AutoThreadTaskRunner> caller_task_runner() {
return caller_task_runner_;
}
scoped_refptr<AutoThreadTaskRunner> io_task_runner() {
return io_task_runner_;
}
// Let the test code analyze the list of desktop sessions.
friend class DaemonProcessTest;
const DesktopSessionList& desktop_sessions() const {
return desktop_sessions_;
}
private:
// Deletes all desktop sessions.
void DeleteAllDesktopSessions();
// Gets the location of the config file.
base::FilePath GetConfigPath();
// Task runner on which public methods of this class must be called.
scoped_refptr<AutoThreadTaskRunner> caller_task_runner_;
// Handles IPC and background I/O tasks.
scoped_refptr<AutoThreadTaskRunner> io_task_runner_;
std::unique_ptr<ConfigWatcher> config_watcher_;
// The configuration file contents.
std::string serialized_config_;
// The list of active desktop sessions.
DesktopSessionList desktop_sessions_;
// The highest desktop session ID that has been seen so far.
int next_terminal_id_;
// Invoked to ask the owner to delete |this|.
base::OnceClosure stopped_callback_;
// Writes host status updates to the system event log.
std::unique_ptr<HostEventLogger> host_event_logger_;
mojo::AssociatedReceiver<mojom::DesktopSessionManager>
desktop_session_manager_{this};
mojo::AssociatedReceiver<mojom::HostStatusObserver> host_status_observer_{
this};
scoped_refptr<HostStatusMonitor> status_monitor_;
};
} // namespace remoting
#endif // REMOTING_HOST_DAEMON_PROCESS_H_
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