components/nacl/browser/nacl_broker_host_win.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 "components/nacl/browser/nacl_broker_host_win.h"
   6
   7 #include "base/base_switches.h"
   8 #include "base/command_line.h"
   9 #include "components/nacl/browser/nacl_broker_service_win.h"
  10 #include "components/nacl/browser/nacl_browser.h"
  11 #include "components/nacl/common/nacl_cmd_line.h"
  12 #include "components/nacl/common/nacl_messages.h"
  13 #include "components/nacl/common/nacl_process_type.h"
  14 #include "components/nacl/common/nacl_switches.h"
  15 #include "content/public/browser/browser_child_process_host.h"
  16 #include "content/public/browser/child_process_data.h"
  17 #include "content/public/common/child_process_host.h"
  18 #include "content/public/common/content_switches.h"
  19 #include "content/public/common/sandboxed_process_launcher_delegate.h"
  20 #include "ipc/ipc_switches.h"
  21
  22 namespace {
  23 // NOTE: changes to this class need to be reviewed by the security team.
  24 class NaClBrokerSandboxedProcessLauncherDelegate
  25     : public content::SandboxedProcessLauncherDelegate {
  26  public:
  27   NaClBrokerSandboxedProcessLauncherDelegate() {}
  28   virtual ~NaClBrokerSandboxedProcessLauncherDelegate() {}
  29
  30   virtual bool ShouldSandbox() override {
  31     return false;
  32   }
  33
  34  private:
  35   DISALLOW_COPY_AND_ASSIGN(NaClBrokerSandboxedProcessLauncherDelegate);
  36 };
  37 }  // namespace
  38
  39 namespace nacl {
  40
  41 NaClBrokerHost::NaClBrokerHost() : is_terminating_(false) {
  42   process_.reset(content::BrowserChildProcessHost::Create(
  43       PROCESS_TYPE_NACL_BROKER, this));
  44 }
  45
  46 NaClBrokerHost::~NaClBrokerHost() {
  47 }
  48
  49 bool NaClBrokerHost::Init() {
  50   // Create the channel that will be used for communicating with the broker.
  51   std::string channel_id = process_->GetHost()->CreateChannel();
  52   if (channel_id.empty())
  53     return false;
  54
  55   // Create the path to the nacl broker/loader executable.
  56   base::FilePath nacl_path;
  57   if (!NaClBrowser::GetInstance()->GetNaCl64ExePath(&nacl_path))
  58     return false;
  59
  60   base::CommandLine* cmd_line = new base::CommandLine(nacl_path);
  61   CopyNaClCommandLineArguments(cmd_line);
  62
  63   cmd_line->AppendSwitchASCII(switches::kProcessType,
  64                               switches::kNaClBrokerProcess);
  65   cmd_line->AppendSwitchASCII(switches::kProcessChannelID, channel_id);
  66   if (NaClBrowser::GetDelegate()->DialogsAreSuppressed())
  67     cmd_line->AppendSwitch(switches::kNoErrorDialogs);
  68
  69   process_->Launch(new NaClBrokerSandboxedProcessLauncherDelegate,
  70                    cmd_line);
  71   return true;
  72 }
  73
  74 bool NaClBrokerHost::OnMessageReceived(const IPC::Message& msg) {
  75   bool handled = true;
  76   IPC_BEGIN_MESSAGE_MAP(NaClBrokerHost, msg)
  77     IPC_MESSAGE_HANDLER(NaClProcessMsg_LoaderLaunched, OnLoaderLaunched)
  78     IPC_MESSAGE_HANDLER(NaClProcessMsg_DebugExceptionHandlerLaunched,
  79                         OnDebugExceptionHandlerLaunched)
  80     IPC_MESSAGE_UNHANDLED(handled = false)
  81   IPC_END_MESSAGE_MAP()
  82   return handled;
  83 }
  84
  85 bool NaClBrokerHost::LaunchLoader(const std::string& loader_channel_id) {
  86   return process_->Send(
  87       new NaClProcessMsg_LaunchLoaderThroughBroker(loader_channel_id));
  88 }
  89
  90 void NaClBrokerHost::OnLoaderLaunched(const std::string& loader_channel_id,
  91                                       base::ProcessHandle handle) {
  92   NaClBrokerService::GetInstance()->OnLoaderLaunched(loader_channel_id, handle);
  93 }
  94
  95 bool NaClBrokerHost::LaunchDebugExceptionHandler(
  96     int32 pid, base::ProcessHandle process_handle,
  97     const std::string& startup_info) {
  98   base::ProcessHandle broker_process = process_->GetData().handle;
  99   base::ProcessHandle handle_in_broker_process;
 100   if (!DuplicateHandle(::GetCurrentProcess(), process_handle,
 101                        broker_process, &handle_in_broker_process,
 102                        0, /* bInheritHandle= */ FALSE, DUPLICATE_SAME_ACCESS))
 103     return false;
 104   return process_->Send(new NaClProcessMsg_LaunchDebugExceptionHandler(
 105       pid, handle_in_broker_process, startup_info));
 106 }
 107
 108 void NaClBrokerHost::OnDebugExceptionHandlerLaunched(int32 pid, bool success) {
 109   NaClBrokerService::GetInstance()->OnDebugExceptionHandlerLaunched(pid,
 110                                                                     success);
 111 }
 112
 113 void NaClBrokerHost::StopBroker() {
 114   is_terminating_ = true;
 115   process_->Send(new NaClProcessMsg_StopBroker());
 116 }
 117
 118 }  // namespace nacl