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