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, base::MessageLoopProxy* ipc_message_loop);
  31
  32   // Send a message to all renderers that the process is going to shutdown.
  33   static void NotifyRenderersOfPendingShutdown();
  34
  35   // IPC::Listener:
  36   bool Send(IPC::Message* msg) override;
  37   bool OnMessageReceived(const IPC::Message& message) override;
  38   void OnChannelError() override;
  39
  40   int renderer_id() { return renderer_id_; }
  41
  42   int GenerateRouteID() override;
  43
  44   // Returns the event that's set when a call to the renderer causes a modal
  45   // dialog to come up.
  46   base::WaitableEvent* GetModalDialogEvent(int render_view_id) override;
  47
  48   bool in_send() { return in_send_ != 0; }
  49
  50   bool incognito() { return incognito_; }
  51   void set_incognito(bool value) { incognito_ = value; }
  52
  53 #if defined(OS_POSIX)
  54   base::ScopedFD TakeRendererFileDescriptor() {
  55     return channel_->TakeClientFileDescriptor();
  56   }
  57 #endif
  58
  59  protected:
  60   ~PluginChannel() override;
  61
  62   // NPChannelBase::
  63   void CleanUp() override;
  64   bool Init(base::MessageLoopProxy* ipc_message_loop,
  65             bool create_pipe_now,
  66             base::WaitableEvent* shutdown_event) override;
  67
  68  private:
  69   class MessageFilter;
  70
  71   // Called on the plugin thread
  72   PluginChannel();
  73
  74   bool OnControlMessageReceived(const IPC::Message& msg) override;
  75
  76   static NPChannelBase* ClassFactory() { return new PluginChannel(); }
  77
  78   void OnCreateInstance(const std::string& mime_type, int* instance_id);
  79   void OnDestroyInstance(int instance_id, IPC::Message* reply_msg);
  80   void OnGenerateRouteID(int* route_id);
  81   void OnClearSiteData(const std::string& site,
  82                        uint64 flags,
  83                        uint64 max_age);
  84   void OnDidAbortLoading(int render_view_id);
  85
  86   std::vector<scoped_refptr<WebPluginDelegateStub> > plugin_stubs_;
  87
  88   ScopedChildProcessReference process_ref_;
  89
  90   // The id of the renderer who is on the other side of the channel.
  91   int renderer_id_;
  92
  93   int in_send_;  // Tracks if we're in a Send call.
  94   bool log_messages_;  // True if we should log sent and received messages.
  95   bool incognito_; // True if the renderer is in incognito mode.
  96   scoped_refptr<MessageFilter> filter_;  // Handles the modal dialog events.
  97
  98   // Dummy NPP value used in the plugin process to represent entities other
  99   // that other plugin instances for the purpose of object ownership tracking.
 100   scoped_ptr<struct _NPP> npp_;
 101
 102   DISALLOW_COPY_AND_ASSIGN(PluginChannel);
 103 };
 104
 105 }  // namespace content
 106
 107 #endif  // CONTENT_PLUGIN_PLUGIN_CHANNEL_H_