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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 <list>
#include "base/basictypes.h"
#include "base/compiler_specific.h"
#include "base/location.h"
#include "base/memory/ref_counted.h"
#include "base/memory/scoped_ptr.h"
#include "base/memory/weak_ptr.h"
#include "base/observer_list.h"
#include "base/process.h"
#include "ipc/ipc_channel.h"
#include "ipc/ipc_channel_proxy.h"
#include "ipc/ipc_platform_file.h"
#include "remoting/base/stoppable.h"
#include "remoting/host/config_file_watcher.h"
#include "remoting/host/host_status_monitor.h"
#include "remoting/host/worker_process_ipc_delegate.h"
struct SerializedTransportRoute;
namespace remoting {
class AutoThreadTaskRunner;
class DesktopSession;
struct DesktopSessionParams;
class HostEventLogger;
class HostStatusObserver;
// 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 Stoppable,
public ConfigFileWatcher::Delegate,
public HostStatusMonitor,
public WorkerProcessIpcDelegate {
public:
typedef std::list<DesktopSession*> DesktopSessionList;
virtual ~DaemonProcess();
// 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 scoped_ptr<DaemonProcess> Create(
scoped_refptr<AutoThreadTaskRunner> caller_task_runner,
scoped_refptr<AutoThreadTaskRunner> io_task_runner,
const base::Closure& stopped_callback);
// ConfigFileWatcher::Delegate
virtual void OnConfigUpdated(const std::string& serialized_config) OVERRIDE;
virtual void OnConfigWatcherError() OVERRIDE;
// HostStatusMonitor interface.
virtual void AddStatusObserver(HostStatusObserver* observer) OVERRIDE;
virtual void RemoveStatusObserver(HostStatusObserver* observer) OVERRIDE;
// WorkerProcessIpcDelegate implementation.
virtual void OnChannelConnected(int32 peer_pid) OVERRIDE;
virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
virtual void OnPermanentError() 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|.
// |desktop_process| is a handle of the desktop integration process.
// |desktop_pipe| specifies the client end of the desktop pipe. Returns true
// on success, false otherwise.
virtual bool OnDesktopSessionAgentAttached(
int terminal_id,
base::ProcessHandle desktop_process,
IPC::PlatformFileForTransit 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 DesktopSessionParams& params,
bool virtual_terminal);
// Requests the network process to crash.
void CrashNetworkProcess(const tracked_objects::Location& location);
// Reads the host configuration and launches the network process.
void Initialize();
// Returns true if |terminal_id| is considered to be known. I.e. it is
// less or equal to the highest ID we have seen so far.
bool IsTerminalIdKnown(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();
// Stoppable implementation.
virtual void DoStop() 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 scoped_ptr<DesktopSession> DoCreateDesktopSession(
int terminal_id,
const DesktopSessionParams& params,
bool virtual_terminal) = 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_;
scoped_ptr<ConfigFileWatcher> 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.
ObserverList<HostStatusObserver> status_observers_;
// Writes host status updates to the system event log.
scoped_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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