content/plugin/plugin_channel.h

   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 #ifndef CONTENT_PLUGIN_PLUGIN_CHANNEL_H_
   6 #define CONTENT_PLUGIN_PLUGIN_CHANNEL_H_
   7
   8 #include <vector>
   9 #include "base/memory/ref_counted.h"
  10 #include "base/process/process.h"
  11 #include "build/build_config.h"
  12 #include "content/child/npapi/np_channel_base.h"
  13 #include "content/child/scoped_child_process_reference.h"
  14 #include "content/plugin/webplugin_delegate_stub.h"
  15
  16 namespace base {
  17 class WaitableEvent;
  18 }
  19
  20 namespace content {
  21
  22 // Encapsulates an IPC channel between the plugin process and one renderer
  23 // process.  On the renderer side there's a corresponding PluginChannelHost.
  24 class PluginChannel : public NPChannelBase {
  25  public:
  26   // Get a new PluginChannel object for the current process to talk to the
  27   // given renderer process. The renderer ID is an opaque unique ID generated
  28   // by the browser.
  29   static PluginChannel* GetPluginChannel(
  30       int renderer_id,
  31       base::SingleThreadTaskRunner* ipc_task_runner);
  32
  33   // Send a message to all renderers that the process is going to shutdown.
  34   static void NotifyRenderersOfPendingShutdown();
  35
  36   // IPC::Listener:
  37   bool Send(IPC::Message* msg) override;
  38   bool OnMessageReceived(const IPC::Message& message) override;
  39   void OnChannelError() override;
  40
  41   int renderer_id() { return renderer_id_; }
  42
  43   int GenerateRouteID() override;
  44
  45   // Returns the event that's set when a call to the renderer causes a modal
  46   // dialog to come up.
  47   base::WaitableEvent* GetModalDialogEvent(int render_view_id) override;
  48
  49   bool in_send() { return in_send_ != 0; }
  50
  51   bool incognito() { return incognito_; }
  52   void set_incognito(bool value) { incognito_ = value; }
  53
  54 #if defined(OS_POSIX)
  55   base::ScopedFD TakeRendererFileDescriptor() {
  56     return channel_->TakeClientFileDescriptor();
  57   }
  58 #endif
  59
  60  protected:
  61   ~PluginChannel() override;
  62
  63   // NPChannelBase::
  64   void CleanUp() override;
  65   bool Init(base::SingleThreadTaskRunner* ipc_task_runner,
  66             bool create_pipe_now,
  67             base::WaitableEvent* shutdown_event) override;
  68
  69  private:
  70   class MessageFilter;
  71
  72   // Called on the plugin thread
  73   PluginChannel();
  74
  75   bool OnControlMessageReceived(const IPC::Message& msg) override;
  76
  77   static NPChannelBase* ClassFactory() { return new PluginChannel(); }
  78
  79   void OnCreateInstance(const std::string& mime_type, int* instance_id);
  80   void OnDestroyInstance(int instance_id, IPC::Message* reply_msg);
  81   void OnGenerateRouteID(int* route_id);
  82   void OnClearSiteData(const std::string& site,
  83                        uint64 flags,
  84                        uint64 max_age);
  85   void OnDidAbortLoading(int render_view_id);
  86
  87   std::vector<scoped_refptr<WebPluginDelegateStub> > plugin_stubs_;
  88
  89   ScopedChildProcessReference process_ref_;
  90
  91   // The id of the renderer who is on the other side of the channel.
  92   int renderer_id_;
  93
  94   int in_send_;  // Tracks if we're in a Send call.
  95   bool log_messages_;  // True if we should log sent and received messages.
  96   bool incognito_; // True if the renderer is in incognito mode.
  97   scoped_refptr<MessageFilter> filter_;  // Handles the modal dialog events.
  98
  99   // Dummy NPP value used in the plugin process to represent entities other
 100   // that other plugin instances for the purpose of object ownership tracking.
 101   scoped_ptr<struct _NPP> npp_;
 102
 103   DISALLOW_COPY_AND_ASSIGN(PluginChannel);
 104 };
 105
 106 }  // namespace content
 107
 108 #endif  // CONTENT_PLUGIN_PLUGIN_CHANNEL_H_