remoting/host/desktop_process.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4 //
   5 // This file implements the Windows service controlling Me2Me host processes
   6 // running within user sessions.
   7
   8 #include "remoting/host/desktop_process.h"
   9
  10 #include "base/bind.h"
  11 #include "base/bind_helpers.h"
  12 #include "base/debug/alias.h"
  13 #include "base/logging.h"
  14 #include "base/memory/ref_counted.h"
  15 #include "base/message_loop/message_loop.h"
  16 #include "base/strings/string_util.h"
  17 #include "ipc/ipc_channel_proxy.h"
  18 #include "remoting/base/auto_thread.h"
  19 #include "remoting/base/auto_thread_task_runner.h"
  20 #include "remoting/host/chromoting_messages.h"
  21 #include "remoting/host/desktop_environment.h"
  22 #include "remoting/host/desktop_session_agent.h"
  23
  24 namespace remoting {
  25
  26 DesktopProcess::DesktopProcess(
  27     scoped_refptr<AutoThreadTaskRunner> caller_task_runner,
  28     scoped_refptr<AutoThreadTaskRunner> input_task_runner,
  29     const std::string& daemon_channel_name)
  30     : caller_task_runner_(caller_task_runner),
  31       input_task_runner_(input_task_runner),
  32       daemon_channel_name_(daemon_channel_name) {
  33   DCHECK(caller_task_runner_->BelongsToCurrentThread());
  34   DCHECK(base::MessageLoopForUI::IsCurrent());
  35 }
  36
  37 DesktopProcess::~DesktopProcess() {
  38   DCHECK(!daemon_channel_);
  39   DCHECK(!desktop_agent_.get());
  40 }
  41
  42 DesktopEnvironmentFactory& DesktopProcess::desktop_environment_factory() {
  43   DCHECK(caller_task_runner_->BelongsToCurrentThread());
  44
  45   return *desktop_environment_factory_;
  46 }
  47
  48 void DesktopProcess::OnNetworkProcessDisconnected() {
  49   DCHECK(caller_task_runner_->BelongsToCurrentThread());
  50
  51   OnChannelError();
  52 }
  53
  54 void DesktopProcess::InjectSas() {
  55   DCHECK(caller_task_runner_->BelongsToCurrentThread());
  56
  57   daemon_channel_->Send(new ChromotingDesktopDaemonMsg_InjectSas());
  58 }
  59
  60 bool DesktopProcess::OnMessageReceived(const IPC::Message& message) {
  61   DCHECK(caller_task_runner_->BelongsToCurrentThread());
  62
  63   bool handled = true;
  64   IPC_BEGIN_MESSAGE_MAP(DesktopProcess, message)
  65     IPC_MESSAGE_HANDLER(ChromotingDaemonMsg_Crash, OnCrash)
  66     IPC_MESSAGE_UNHANDLED(handled = false)
  67   IPC_END_MESSAGE_MAP()
  68
  69   CHECK(handled) << "Received unexpected IPC type: " << message.type();
  70   return handled;
  71 }
  72
  73 void DesktopProcess::OnChannelConnected(int32 peer_pid) {
  74   DCHECK(caller_task_runner_->BelongsToCurrentThread());
  75
  76   VLOG(1) << "IPC: desktop <- daemon (" << peer_pid << ")";
  77 }
  78
  79 void DesktopProcess::OnChannelError() {
  80   // Shutdown the desktop process.
  81   daemon_channel_.reset();
  82   if (desktop_agent_.get()) {
  83     desktop_agent_->Stop();
  84     desktop_agent_ = nullptr;
  85   }
  86
  87   caller_task_runner_ = nullptr;
  88   input_task_runner_ = nullptr;
  89   desktop_environment_factory_.reset();
  90 }
  91
  92 bool DesktopProcess::Start(
  93     scoped_ptr<DesktopEnvironmentFactory> desktop_environment_factory) {
  94   DCHECK(caller_task_runner_->BelongsToCurrentThread());
  95   DCHECK(!desktop_environment_factory_);
  96   DCHECK(desktop_environment_factory);
  97
  98   desktop_environment_factory_ = desktop_environment_factory.Pass();
  99
 100   // Launch the audio capturing thread.
 101   scoped_refptr<AutoThreadTaskRunner> audio_task_runner;
 102 #if defined(OS_WIN)
 103   // On Windows the AudioCapturer requires COM, so we run a single-threaded
 104   // apartment, which requires a UI thread.
 105   audio_task_runner =
 106       AutoThread::CreateWithLoopAndComInitTypes("ChromotingAudioThread",
 107                                                 caller_task_runner_,
 108                                                 base::MessageLoop::TYPE_UI,
 109                                                 AutoThread::COM_INIT_STA);
 110 #else // !defined(OS_WIN)
 111   audio_task_runner = AutoThread::CreateWithType(
 112       "ChromotingAudioThread", caller_task_runner_, base::MessageLoop::TYPE_IO);
 113 #endif  // !defined(OS_WIN)
 114
 115   // Launch the I/O thread.
 116   scoped_refptr<AutoThreadTaskRunner> io_task_runner =
 117       AutoThread::CreateWithType(
 118           "I/O thread", caller_task_runner_, base::MessageLoop::TYPE_IO);
 119
 120   // Launch the video capture thread.
 121   scoped_refptr<AutoThreadTaskRunner> video_capture_task_runner =
 122       AutoThread::Create("Video capture thread", caller_task_runner_);
 123
 124   // Create a desktop agent.
 125   desktop_agent_ = new DesktopSessionAgent(audio_task_runner,
 126                                            caller_task_runner_,
 127                                            input_task_runner_,
 128                                            io_task_runner,
 129                                            video_capture_task_runner);
 130
 131   // Start the agent and create an IPC channel to talk to it.
 132   IPC::PlatformFileForTransit desktop_pipe;
 133   if (!desktop_agent_->Start(AsWeakPtr(), &desktop_pipe)) {
 134     desktop_agent_ = nullptr;
 135     caller_task_runner_ = nullptr;
 136     input_task_runner_ = nullptr;
 137     desktop_environment_factory_.reset();
 138     return false;
 139   }
 140
 141   // Connect to the daemon.
 142   daemon_channel_ = IPC::ChannelProxy::Create(daemon_channel_name_,
 143                                               IPC::Channel::MODE_CLIENT,
 144                                               this,
 145                                               io_task_runner.get(),
 146                                               nullptr);
 147
 148   // Pass |desktop_pipe| to the daemon.
 149   daemon_channel_->Send(
 150       new ChromotingDesktopDaemonMsg_DesktopAttached(desktop_pipe));
 151
 152   return true;
 153 }
 154
 155 void DesktopProcess::OnCrash(const std::string& function_name,
 156                              const std::string& file_name,
 157                              const int& line_number) {
 158   char message[1024];
 159   base::snprintf(message, sizeof(message),
 160                  "Requested by %s at %s, line %d.",
 161                  function_name.c_str(), file_name.c_str(), line_number);
 162   base::debug::Alias(message);
 163
 164   // The daemon requested us to crash the process.
 165   CHECK(false) << message;
 166 }
 167
 168 } // namespace remoting