Generates the DTLS identity in browser process and returns it to render process.

content/browser/renderer_host/media/webrtc_identity_service_host.h

+// Copyright (c) 2013 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.
+
+#ifndef CONTENT_BROWSER_RENDERER_HOST_MEDIA_WEBRTC_IDENTITY_SERVICE_HOST_H_
+#define CONTENT_BROWSER_RENDERER_HOST_MEDIA_WEBRTC_IDENTITY_SERVICE_HOST_H_
+
+#include <string>
+
+#include "base/basictypes.h"
+#include "content/public/browser/browser_message_filter.h"
+
+class GURL;
+
+namespace content {
+
+class WebRTCIdentityStore;
+
+// This class is the host for WebRTCIdentityService in the browser process.
+// It converts the IPC messages for requesting a WebRTC DTLS identity and
+// cancelling a pending request into calls of WebRTCIdentityStore. It also sends
+// the request result back to the renderer through IPC.
+// Only one outstanding request is allowed per renderer at a time. If a second
+// request is made before the first one completes, an IPC with error
+// ERR_INSUFFICIENT_RESOURCES will be sent back to the renderer.
+class WebRTCIdentityServiceHost : public BrowserMessageFilter {
+ public:
+  explicit WebRTCIdentityServiceHost(WebRTCIdentityStore* identity_store);
+
+ private:
+  virtual ~WebRTCIdentityServiceHost();
+
+  // content::BrowserMessageFilter override.
+  virtual bool OnMessageReceived(const IPC::Message& message,
+                                 bool* message_was_ok) OVERRIDE;
+
+  void OnComplete(int request_id,
+                  int error,
+                  const std::string& certificate,
+                  const std::string& private_key);
+
+  // Requests a DTLS identity from the DTLS identity store for the given
+  // |origin| and |identity_name|. If no such identity exists, a new one will be
+  // generated using the given |common_name|.
+  // |request_id| is a unique id chosen by the client and used to cancel a
+  // pending request.
+  void OnRequestIdentity(int request_id,
+                         const GURL& origin,
+                         const std::string& identity_name,
+                         const std::string& common_name);
+
+  // Cancels a pending request by its id. If there is no pending request having
+  // the same id, the call is ignored.
+  void OnCancelRequest(int request_id);
+
+  void SendErrorMessage(int request_id, int error);
+
+  base::Closure cancel_callback_;
+  WebRTCIdentityStore* identity_store_;
+
+  DISALLOW_COPY_AND_ASSIGN(WebRTCIdentityServiceHost);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_RENDERER_HOST_MEDIA_WEBRTC_IDENTITY_SERVICE_HOST_H_