P2P sockets IPC dispatcher for the renderer side.

chrome/renderer/p2p/socket_dispatcher.h

+// Copyright (c) 2011 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.
+
+// P2PSocketDispatcher is a per-renderer object that dispatchers all
+// P2P messages received from the browser and relays all P2P messages
+// sent to the browser. P2PSocketClient instances register themselves
+// with the dispatcher using RegisterClient() and UnregisterClient().
+//
+// Relationship of classes.
+//
+//      P2PSocketHost                 P2PSocketClient
+//           ^                               ^
+//           |                               |
+//           v              IPC              v
+//      P2PSocketsHost  <--------->  P2PSocketDispatcher

[Alpha Left Google, 2011/03/02 21:56:10]

Hm.. Having P2PSocketsHost and P2PSocketHost is confusing... Chromium convention
is to use

P2PSocketDispatcherHost and P2PSocketService, does it sound good to you?

[Sergey Ulanov, 2011/03/02 23:56:43]

I agree that the naming sucks. Thanks for your suggestions. Can I fix it in a
separate change?

+//
+
+#ifndef CHROME_RENDERER_P2P_SOCKET_DISPATCHER_H_
+#define CHROME_RENDERER_P2P_SOCKET_DISPATCHER_H_
+
+#include <vector>
+
+#include "base/id_map.h"
+#include "chrome/renderer/p2p/socket_client.h"
+#include "content/common/p2p_sockets.h"
+#include "chrome/renderer/render_view_observer.h"
+
+class MessageLoop;
+
+// P2PSocketDispatcher works on the same thread it was created on. It

[Alpha Left Google, 2011/03/02 21:56:10]

I'd just say it works only on render thread or IO thread. I assume we won't use
it anywhere else.

[Sergey Ulanov, 2011/03/02 23:56:43]

Done.

+// dispatches all messages on that thread, and all its methods must be
+// called on the same thread.
+class P2PSocketDispatcher : public RenderViewObserver {
+ public:
+  explicit P2PSocketDispatcher(RenderView* render_view);
+  virtual ~P2PSocketDispatcher();
+
+  P2PSocketClient* CreateSocket(P2PSocketType type, P2PSocketAddress address,
+                                P2PSocketClient::Delegate* delegate);
+
+  // RenderViewObserver overrides.
+  virtual bool OnMessageReceived(const IPC::Message& message);
+
+ private:
+  friend class P2PSocketClient;
+
+  // Called by P2PSocketClient.
+  int RegisterClient(P2PSocketClient* client);
+  void UnregisterClient(int id);
+  void SendP2PMessage(IPC::Message* msg);
+  MessageLoop* message_loop();
+
+  // Incoming message handlers.
+  void OnSocketCreated(int socket_id, P2PSocketAddress address);
+  void OnError(int socket_id);
+  void OnDataReceived(int socket_id, P2PSocketAddress address,
+                      const std::vector<char>& data);
+
+  P2PSocketClient* GetClient(int socket_id);
+
+  MessageLoop* message_loop_;
+  IDMap<P2PSocketClient> clients_;
+
+  DISALLOW_COPY_AND_ASSIGN(P2PSocketDispatcher);
+};
+
+#endif  // CHROME_RENDERER_P2P_SOCKET_DISPATCHER_H_