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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.
#include "remoting/host/daemon_process.h"
#include "base/bind.h"
#include "base/bind_helpers.h"
#include "base/command_line.h"
#include "base/file_path.h"
#include "base/file_util.h"
#include "base/single_thread_task_runner.h"
#include "remoting/base/auto_thread_task_runner.h"
#include "remoting/host/branding.h"
#include "remoting/host/chromoting_messages.h"
#include "remoting/host/desktop_session.h"
namespace remoting {
DaemonProcess::~DaemonProcess() {
DCHECK(!config_watcher_.get());
DCHECK(desktop_sessions_.empty());
}
void DaemonProcess::OnConfigUpdated(const std::string& serialized_config) {
DCHECK(caller_task_runner()->BelongsToCurrentThread());
if (serialized_config_ != serialized_config) {
serialized_config_ = serialized_config;
SendToNetwork(
new ChromotingDaemonNetworkMsg_Configuration(serialized_config_));
}
}
void DaemonProcess::OnConfigWatcherError() {
DCHECK(caller_task_runner()->BelongsToCurrentThread());
Stop();
}
void DaemonProcess::OnChannelConnected(int32 peer_pid) {
DCHECK(caller_task_runner()->BelongsToCurrentThread());
VLOG(1) << "IPC: daemon <- network (" << peer_pid << ")";
DeleteAllDesktopSessions();
// Reset the last known terminal ID because no IDs have been allocated
// by the the newly started process yet.
next_terminal_id_ = 0;
// Send the configuration to the network process.
SendToNetwork(
new ChromotingDaemonNetworkMsg_Configuration(serialized_config_));
}
bool DaemonProcess::OnMessageReceived(const IPC::Message& message) {
DCHECK(caller_task_runner()->BelongsToCurrentThread());
bool handled = true;
IPC_BEGIN_MESSAGE_MAP(DaemonProcess, message)
IPC_MESSAGE_HANDLER(ChromotingNetworkHostMsg_ConnectTerminal,
CreateDesktopSession)
IPC_MESSAGE_HANDLER(ChromotingNetworkHostMsg_DisconnectTerminal,
CloseDesktopSession)
IPC_MESSAGE_UNHANDLED(handled = false)
IPC_END_MESSAGE_MAP()
return handled;
}
void DaemonProcess::OnPermanentError() {
DCHECK(caller_task_runner()->BelongsToCurrentThread());
Stop();
}
void DaemonProcess::CloseDesktopSession(int terminal_id) {
DCHECK(caller_task_runner()->BelongsToCurrentThread());
// Validate the supplied terminal ID. An attempt to close a desktop session
// with an ID that couldn't possibly have been allocated is considered
// a protocol error and the network process will be restarted.
if (!IsTerminalIdKnown(terminal_id)) {
LOG(ERROR) << "An invalid terminal ID. terminal_id=" << terminal_id;
CrashNetworkProcess(FROM_HERE);
DeleteAllDesktopSessions();
return;
}
DesktopSessionList::iterator i;
for (i = desktop_sessions_.begin(); i != desktop_sessions_.end(); ++i) {
if ((*i)->id() == terminal_id) {
break;
}
}
// It is OK if the terminal ID wasn't found. There is a race between
// the network and daemon processes. Each frees its own recources first and
// notifies the other party if there was something to clean up.
if (i == desktop_sessions_.end())
return;
delete *i;
desktop_sessions_.erase(i);
VLOG(1) << "Daemon: closed desktop session " << terminal_id;
SendToNetwork(
new ChromotingDaemonNetworkMsg_TerminalDisconnected(terminal_id));
}
DaemonProcess::DaemonProcess(
scoped_refptr<AutoThreadTaskRunner> caller_task_runner,
scoped_refptr<AutoThreadTaskRunner> io_task_runner,
const base::Closure& stopped_callback)
: Stoppable(caller_task_runner, stopped_callback),
caller_task_runner_(caller_task_runner),
io_task_runner_(io_task_runner),
next_terminal_id_(0) {
DCHECK(caller_task_runner->BelongsToCurrentThread());
}
bool DaemonProcess::IsTerminalIdKnown(int terminal_id) {
return terminal_id < next_terminal_id_;
}
void DaemonProcess::CreateDesktopSession(int terminal_id) {
DCHECK(caller_task_runner()->BelongsToCurrentThread());
// Validate the supplied terminal ID. An attempt to create a desktop session
// with an ID that could possibly have been allocated already is considered
// a protocol error and the network process will be restarted.
if (IsTerminalIdKnown(terminal_id)) {
LOG(ERROR) << "An invalid terminal ID. terminal_id=" << terminal_id;
CrashNetworkProcess(FROM_HERE);
DeleteAllDesktopSessions();
return;
}
VLOG(1) << "Daemon: opened desktop session " << terminal_id;
desktop_sessions_.push_back(
DoCreateDesktopSession(terminal_id).release());
next_terminal_id_ = std::max(next_terminal_id_, terminal_id + 1);
}
void DaemonProcess::CrashNetworkProcess(
const tracked_objects::Location& location) {
SendToNetwork(new ChromotingDaemonNetworkMsg_Crash(
location.function_name(), location.file_name(), location.line_number()));
}
void DaemonProcess::Initialize() {
DCHECK(caller_task_runner()->BelongsToCurrentThread());
// Get the name of the host configuration file.
base::FilePath default_config_dir = remoting::GetConfigDir();
base::FilePath config_path = default_config_dir.Append(kDefaultHostConfigFile);
const CommandLine* command_line = CommandLine::ForCurrentProcess();
if (command_line->HasSwitch(kHostConfigSwitchName)) {
config_path = command_line->GetSwitchValuePath(kHostConfigSwitchName);
}
// Start watching the host configuration file.
config_watcher_.reset(new ConfigFileWatcher(caller_task_runner(),
io_task_runner(),
this));
config_watcher_->Watch(config_path);
// Launch the process.
LaunchNetworkProcess();
}
void DaemonProcess::DoStop() {
DCHECK(caller_task_runner()->BelongsToCurrentThread());
config_watcher_.reset();
DeleteAllDesktopSessions();
CompleteStopping();
}
void DaemonProcess::DeleteAllDesktopSessions() {
while (!desktop_sessions_.empty()) {
delete desktop_sessions_.front();
desktop_sessions_.pop_front();
}
}
} // namespace remoting
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