remoting/host/daemon_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 #include "remoting/host/daemon_process.h"
   6
   7 #include <algorithm>
   8 #include <string>
   9
  10 #include "base/bind.h"
  11 #include "base/bind_helpers.h"
  12 #include "base/command_line.h"
  13 #include "base/file_util.h"
  14 #include "base/files/file_path.h"
  15 #include "base/location.h"
  16 #include "base/single_thread_task_runner.h"
  17 #include "net/base/net_util.h"
  18 #include "remoting/base/auto_thread_task_runner.h"
  19 #include "remoting/host/branding.h"
  20 #include "remoting/host/chromoting_messages.h"
  21 #include "remoting/host/config_file_watcher.h"
  22 #include "remoting/host/desktop_session.h"
  23 #include "remoting/host/host_event_logger.h"
  24 #include "remoting/host/host_status_observer.h"
  25 #include "remoting/host/screen_resolution.h"
  26 #include "remoting/protocol/transport.h"
  27
  28 namespace remoting {
  29
  30 namespace {
  31
  32 // This is used for tagging system event logs.
  33 const char kApplicationName[] = "chromoting";
  34
  35 std::ostream& operator<<(std::ostream& os, const ScreenResolution& resolution) {
  36   return os << resolution.dimensions().width() << "x"
  37             << resolution.dimensions().height() << " at "
  38             << resolution.dpi().x() << "x" << resolution.dpi().y() << " DPI";
  39 }
  40
  41 }  // namespace
  42
  43 DaemonProcess::~DaemonProcess() {
  44   DCHECK(caller_task_runner()->BelongsToCurrentThread());
  45
  46   host_event_logger_.reset();
  47   weak_factory_.InvalidateWeakPtrs();
  48
  49   config_watcher_.reset();
  50   DeleteAllDesktopSessions();
  51 }
  52
  53 void DaemonProcess::OnConfigUpdated(const std::string& serialized_config) {
  54   DCHECK(caller_task_runner()->BelongsToCurrentThread());
  55
  56   if (serialized_config_ != serialized_config) {
  57     serialized_config_ = serialized_config;
  58     SendToNetwork(
  59         new ChromotingDaemonNetworkMsg_Configuration(serialized_config_));
  60   }
  61 }
  62
  63 void DaemonProcess::OnConfigWatcherError() {
  64   DCHECK(caller_task_runner()->BelongsToCurrentThread());
  65
  66   Stop();
  67 }
  68
  69 void DaemonProcess::AddStatusObserver(HostStatusObserver* observer) {
  70   DCHECK(caller_task_runner()->BelongsToCurrentThread());
  71
  72   status_observers_.AddObserver(observer);
  73 }
  74
  75 void DaemonProcess::RemoveStatusObserver(HostStatusObserver* observer) {
  76   DCHECK(caller_task_runner()->BelongsToCurrentThread());
  77
  78   status_observers_.RemoveObserver(observer);
  79 }
  80
  81 void DaemonProcess::OnChannelConnected(int32 peer_pid) {
  82   DCHECK(caller_task_runner()->BelongsToCurrentThread());
  83
  84   VLOG(1) << "IPC: daemon <- network (" << peer_pid << ")";
  85
  86   DeleteAllDesktopSessions();
  87
  88   // Reset the last known terminal ID because no IDs have been allocated
  89   // by the the newly started process yet.
  90   next_terminal_id_ = 0;
  91
  92   // Send the configuration to the network process.
  93   SendToNetwork(
  94       new ChromotingDaemonNetworkMsg_Configuration(serialized_config_));
  95 }
  96
  97 bool DaemonProcess::OnMessageReceived(const IPC::Message& message) {
  98   DCHECK(caller_task_runner()->BelongsToCurrentThread());
  99
 100   bool handled = true;
 101   IPC_BEGIN_MESSAGE_MAP(DaemonProcess, message)
 102     IPC_MESSAGE_HANDLER(ChromotingNetworkHostMsg_ConnectTerminal,
 103                         CreateDesktopSession)
 104     IPC_MESSAGE_HANDLER(ChromotingNetworkHostMsg_DisconnectTerminal,
 105                         CloseDesktopSession)
 106     IPC_MESSAGE_HANDLER(ChromotingNetworkDaemonMsg_SetScreenResolution,
 107                         SetScreenResolution)
 108     IPC_MESSAGE_HANDLER(ChromotingNetworkDaemonMsg_AccessDenied,
 109                         OnAccessDenied)
 110     IPC_MESSAGE_HANDLER(ChromotingNetworkDaemonMsg_ClientAuthenticated,
 111                         OnClientAuthenticated)
 112     IPC_MESSAGE_HANDLER(ChromotingNetworkDaemonMsg_ClientConnected,
 113                         OnClientConnected)
 114     IPC_MESSAGE_HANDLER(ChromotingNetworkDaemonMsg_ClientDisconnected,
 115                         OnClientDisconnected)
 116     IPC_MESSAGE_HANDLER(ChromotingNetworkDaemonMsg_ClientRouteChange,
 117                         OnClientRouteChange)
 118     IPC_MESSAGE_HANDLER(ChromotingNetworkDaemonMsg_HostStarted,
 119                         OnHostStarted)
 120     IPC_MESSAGE_HANDLER(ChromotingNetworkDaemonMsg_HostShutdown,
 121                         OnHostShutdown)
 122     IPC_MESSAGE_UNHANDLED(handled = false)
 123   IPC_END_MESSAGE_MAP()
 124
 125   if (!handled) {
 126     LOG(ERROR) << "Received unexpected IPC type: " << message.type();
 127     CrashNetworkProcess(FROM_HERE);
 128   }
 129
 130   return handled;
 131 }
 132
 133 void DaemonProcess::OnPermanentError(int exit_code) {
 134   DCHECK(caller_task_runner()->BelongsToCurrentThread());
 135   Stop();
 136 }
 137
 138 void DaemonProcess::CloseDesktopSession(int terminal_id) {
 139   DCHECK(caller_task_runner()->BelongsToCurrentThread());
 140
 141   // Validate the supplied terminal ID. An attempt to use a desktop session ID
 142   // that couldn't possibly have been allocated is considered a protocol error
 143   // and the network process will be restarted.
 144   if (!WasTerminalIdAllocated(terminal_id)) {
 145     LOG(ERROR) << "Invalid terminal ID: " << terminal_id;
 146     CrashNetworkProcess(FROM_HERE);
 147     return;
 148   }
 149
 150   DesktopSessionList::iterator i;
 151   for (i = desktop_sessions_.begin(); i != desktop_sessions_.end(); ++i) {
 152     if ((*i)->id() == terminal_id) {
 153       break;
 154     }
 155   }
 156
 157   // It is OK if the terminal ID wasn't found. There is a race between
 158   // the network and daemon processes. Each frees its own recources first and
 159   // notifies the other party if there was something to clean up.
 160   if (i == desktop_sessions_.end())
 161     return;
 162
 163   delete *i;
 164   desktop_sessions_.erase(i);
 165
 166   VLOG(1) << "Daemon: closed desktop session " << terminal_id;
 167   SendToNetwork(
 168       new ChromotingDaemonNetworkMsg_TerminalDisconnected(terminal_id));
 169 }
 170
 171 DaemonProcess::DaemonProcess(
 172     scoped_refptr<AutoThreadTaskRunner> caller_task_runner,
 173     scoped_refptr<AutoThreadTaskRunner> io_task_runner,
 174     const base::Closure& stopped_callback)
 175     : caller_task_runner_(caller_task_runner),
 176       io_task_runner_(io_task_runner),
 177       next_terminal_id_(0),
 178       stopped_callback_(stopped_callback),
 179       weak_factory_(this) {
 180   DCHECK(caller_task_runner->BelongsToCurrentThread());
 181 }
 182
 183 void DaemonProcess::CreateDesktopSession(int terminal_id,
 184                                          const ScreenResolution& resolution,
 185                                          bool virtual_terminal) {
 186   DCHECK(caller_task_runner()->BelongsToCurrentThread());
 187
 188   // Validate the supplied terminal ID. An attempt to create a desktop session
 189   // with an ID that could possibly have been allocated already is considered
 190   // a protocol error and the network process will be restarted.
 191   if (WasTerminalIdAllocated(terminal_id)) {
 192     LOG(ERROR) << "Invalid terminal ID: " << terminal_id;
 193     CrashNetworkProcess(FROM_HERE);
 194     return;
 195   }
 196
 197   // Terminal IDs cannot be reused. Update the expected next terminal ID.
 198   next_terminal_id_ = std::max(next_terminal_id_, terminal_id + 1);
 199
 200   // Create the desktop session.
 201   scoped_ptr<DesktopSession> session = DoCreateDesktopSession(
 202       terminal_id, resolution, virtual_terminal);
 203   if (!session) {
 204     LOG(ERROR) << "Failed to create a desktop session.";
 205     SendToNetwork(
 206         new ChromotingDaemonNetworkMsg_TerminalDisconnected(terminal_id));
 207     return;
 208   }
 209
 210   VLOG(1) << "Daemon: opened desktop session " << terminal_id;
 211   desktop_sessions_.push_back(session.release());
 212 }
 213
 214 void DaemonProcess::SetScreenResolution(int terminal_id,
 215                                         const ScreenResolution& resolution) {
 216   DCHECK(caller_task_runner()->BelongsToCurrentThread());
 217
 218   // Validate the supplied terminal ID. An attempt to use a desktop session ID
 219   // that couldn't possibly have been allocated is considered a protocol error
 220   // and the network process will be restarted.
 221   if (!WasTerminalIdAllocated(terminal_id)) {
 222     LOG(ERROR) << "Invalid terminal ID: " << terminal_id;
 223     CrashNetworkProcess(FROM_HERE);
 224     return;
 225   }
 226
 227   // Validate |resolution| and restart the sender if it is not valid.
 228   if (resolution.IsEmpty()) {
 229     LOG(ERROR) << "Invalid resolution specified: " << resolution;
 230     CrashNetworkProcess(FROM_HERE);
 231     return;
 232   }
 233
 234   DesktopSessionList::iterator i;
 235   for (i = desktop_sessions_.begin(); i != desktop_sessions_.end(); ++i) {
 236     if ((*i)->id() == terminal_id) {
 237       break;
 238     }
 239   }
 240
 241   // It is OK if the terminal ID wasn't found. There is a race between
 242   // the network and daemon processes. Each frees its own resources first and
 243   // notifies the other party if there was something to clean up.
 244   if (i == desktop_sessions_.end())
 245     return;
 246
 247   (*i)->SetScreenResolution(resolution);
 248 }
 249
 250 void DaemonProcess::CrashNetworkProcess(
 251     const tracked_objects::Location& location) {
 252   DCHECK(caller_task_runner()->BelongsToCurrentThread());
 253
 254   DoCrashNetworkProcess(location);
 255   DeleteAllDesktopSessions();
 256 }
 257
 258 void DaemonProcess::Initialize() {
 259   DCHECK(caller_task_runner()->BelongsToCurrentThread());
 260
 261   const base::CommandLine* command_line =
 262       base::CommandLine::ForCurrentProcess();
 263   // Get the name of the host configuration file.
 264   base::FilePath default_config_dir = remoting::GetConfigDir();
 265   base::FilePath config_path = default_config_dir.Append(
 266       kDefaultHostConfigFile);
 267   if (command_line->HasSwitch(kHostConfigSwitchName)) {
 268     config_path = command_line->GetSwitchValuePath(kHostConfigSwitchName);
 269   }
 270   config_watcher_.reset(new ConfigFileWatcher(
 271       caller_task_runner(), io_task_runner(), config_path));
 272   config_watcher_->Watch(this);
 273   host_event_logger_ =
 274       HostEventLogger::Create(weak_factory_.GetWeakPtr(), kApplicationName);
 275
 276   // Launch the process.
 277   LaunchNetworkProcess();
 278 }
 279
 280 void DaemonProcess::Stop() {
 281   DCHECK(caller_task_runner()->BelongsToCurrentThread());
 282
 283   if (!stopped_callback_.is_null()) {
 284     base::Closure stopped_callback = stopped_callback_;
 285     stopped_callback_.Reset();
 286     stopped_callback.Run();
 287   }
 288 }
 289
 290 bool DaemonProcess::WasTerminalIdAllocated(int terminal_id) {
 291   return terminal_id < next_terminal_id_;
 292 }
 293
 294 void DaemonProcess::OnAccessDenied(const std::string& jid) {
 295   DCHECK(caller_task_runner()->BelongsToCurrentThread());
 296
 297   FOR_EACH_OBSERVER(HostStatusObserver, status_observers_, OnAccessDenied(jid));
 298 }
 299
 300 void DaemonProcess::OnClientAuthenticated(const std::string& jid) {
 301   DCHECK(caller_task_runner()->BelongsToCurrentThread());
 302
 303   FOR_EACH_OBSERVER(HostStatusObserver, status_observers_,
 304                     OnClientAuthenticated(jid));
 305 }
 306
 307 void DaemonProcess::OnClientConnected(const std::string& jid) {
 308   DCHECK(caller_task_runner()->BelongsToCurrentThread());
 309
 310   FOR_EACH_OBSERVER(HostStatusObserver, status_observers_,
 311                     OnClientConnected(jid));
 312 }
 313
 314 void DaemonProcess::OnClientDisconnected(const std::string& jid) {
 315   DCHECK(caller_task_runner()->BelongsToCurrentThread());
 316
 317   FOR_EACH_OBSERVER(HostStatusObserver, status_observers_,
 318                     OnClientDisconnected(jid));
 319 }
 320
 321 void DaemonProcess::OnClientRouteChange(const std::string& jid,
 322                                         const std::string& channel_name,
 323                                         const SerializedTransportRoute& route) {
 324   DCHECK(caller_task_runner()->BelongsToCurrentThread());
 325
 326   // Validate |route|.
 327   if (route.type != protocol::TransportRoute::DIRECT &&
 328       route.type != protocol::TransportRoute::STUN &&
 329       route.type != protocol::TransportRoute::RELAY) {
 330     LOG(ERROR) << "An invalid RouteType " << route.type << " passed.";
 331     CrashNetworkProcess(FROM_HERE);
 332     return;
 333   }
 334   if (route.remote_address.size() != net::kIPv4AddressSize &&
 335       route.remote_address.size() != net::kIPv6AddressSize) {
 336     LOG(ERROR) << "An invalid net::IPAddressNumber size "
 337                << route.remote_address.size() << " passed.";
 338     CrashNetworkProcess(FROM_HERE);
 339     return;
 340   }
 341   if (route.local_address.size() != net::kIPv4AddressSize &&
 342       route.local_address.size() != net::kIPv6AddressSize) {
 343     LOG(ERROR) << "An invalid net::IPAddressNumber size "
 344                << route.local_address.size() << " passed.";
 345     CrashNetworkProcess(FROM_HERE);
 346     return;
 347   }
 348
 349   protocol::TransportRoute parsed_route;
 350   parsed_route.type =
 351       static_cast<protocol::TransportRoute::RouteType>(route.type);
 352   parsed_route.remote_address =
 353       net::IPEndPoint(route.remote_address, route.remote_port);
 354   parsed_route.local_address =
 355       net::IPEndPoint(route.local_address, route.local_port);
 356   FOR_EACH_OBSERVER(HostStatusObserver, status_observers_,
 357                     OnClientRouteChange(jid, channel_name, parsed_route));
 358 }
 359
 360 void DaemonProcess::OnHostStarted(const std::string& xmpp_login) {
 361   DCHECK(caller_task_runner()->BelongsToCurrentThread());
 362
 363   FOR_EACH_OBSERVER(HostStatusObserver, status_observers_, OnStart(xmpp_login));
 364 }
 365
 366 void DaemonProcess::OnHostShutdown() {
 367   DCHECK(caller_task_runner()->BelongsToCurrentThread());
 368
 369   FOR_EACH_OBSERVER(HostStatusObserver, status_observers_, OnShutdown());
 370 }
 371
 372 void DaemonProcess::DeleteAllDesktopSessions() {
 373   while (!desktop_sessions_.empty()) {
 374     delete desktop_sessions_.front();
 375     desktop_sessions_.pop_front();
 376   }
 377 }
 378
 379 }  // namespace remoting