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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.
#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/macros.h"
#include "base/memory/ref_counted.h"
#include "base/memory/weak_ptr.h"
#include "base/observer_list.h"
#include "base/process/process.h"
#include "ipc/ipc_channel.h"
#include "ipc/ipc_channel_handle.h"
#include "remoting/host/config_watcher.h"
#include "remoting/host/host_status_monitor.h"
#include "remoting/host/worker_process_ipc_delegate.h"
struct SerializedTransportRoute;
namespace tracked_objects {
class Location;
} // namespace tracked_objects
namespace remoting {
class AutoThreadTaskRunner;
class DesktopSession;
class HostEventLogger;
class HostStatusObserver;
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 HostStatusMonitor,
public WorkerProcessIpcDelegate {
public:
typedef std::list<DesktopSession*> DesktopSessionList;
~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::Closure& stopped_callback);
// ConfigWatcher::Delegate
void OnConfigUpdated(const std::string& serialized_config) override;
void OnConfigWatcherError() override;
// HostStatusMonitor interface.
void AddStatusObserver(HostStatusObserver* observer) override;
void RemoveStatusObserver(HostStatusObserver* observer) override;
// WorkerProcessIpcDelegate implementation.
void OnChannelConnected(int32_t peer_pid) override;
bool OnMessageReceived(const IPC::Message& message) override;
void OnPermanentError(int exit_code) override;
// Sends an IPC message to the network process. The message will be dropped
// unless the network process is connected over the IPC channel.
virtual void SendToNetwork(IPC::Message* message) = 0;
// 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,
const IPC::ChannelHandle& desktop_pipe) = 0;
// Closes the desktop session identified by |terminal_id|.
void CloseDesktopSession(int terminal_id);
protected:
DaemonProcess(scoped_refptr<AutoThreadTaskRunner> caller_task_runner,
scoped_refptr<AutoThreadTaskRunner> io_task_runner,
const base::Closure& stopped_callback);
// Creates a desktop session and assigns a unique ID to it.
void CreateDesktopSession(int terminal_id,
const ScreenResolution& resolution,
bool virtual_terminal);
// Changes the screen resolution of the desktop session identified by
// |terminal_id|.
void SetScreenResolution(int terminal_id, const ScreenResolution& resolution);
// Requests the network process to crash.
void CrashNetworkProcess(const tracked_objects::Location& location);
// 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);
// Handlers for the host status notifications received from the network
// process.
void OnAccessDenied(const std::string& jid);
void OnClientAuthenticated(const std::string& jid);
void OnClientConnected(const std::string& jid);
void OnClientDisconnected(const std::string& jid);
void OnClientRouteChange(const std::string& jid,
const std::string& channel_name,
const SerializedTransportRoute& route);
void OnHostStarted(const std::string& xmpp_login);
void OnHostShutdown();
// 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 tracked_objects::Location& location) = 0;
// Launches the network process and establishes an IPC channel with it.
virtual void LaunchNetworkProcess() = 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();
// 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_;
// Keeps track of observers receiving host status notifications.
base::ObserverList<HostStatusObserver> status_observers_;
// Invoked to ask the owner to delete |this|.
base::Closure stopped_callback_;
// Writes host status updates to the system event log.
std::unique_ptr<HostEventLogger> host_event_logger_;
base::WeakPtrFactory<DaemonProcess> weak_factory_;
DISALLOW_COPY_AND_ASSIGN(DaemonProcess);
};
} // namespace remoting
#endif // REMOTING_HOST_DAEMON_PROCESS_H_
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