[Chromoting] Hook up host talkgadget policy checks.

remoting/host/connection_block_checker.h

+// Copyright (c) 2012 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 REMOTING_HOST_CONNECTION_BLOCK_CHECKER_H_
+#define REMOTING_HOST_CONNECTION_BLOCK_CHECKER_H_
+
+#include "net/url_request/url_fetcher_delegate.h"
+
+namespace remoting {
+
+class ChromotingHostContext;
+
+class ConnectionBlockChecker : public net::URLFetcherDelegate {
+ public:
+  enum Status {
+    UNKNOWN,
+    ALLOW,
+    DENY,

[Sergey Ulanov, 2012/08/28 00:33:42]

UNKNOWN/DENY distinction is not reliable, so I think it's better to have only
two states - ALLOW and DENY.

[garykac, 2012/08/29 00:07:15]

Removed.

+  };
+
+  ConnectionBlockChecker(ChromotingHostContext* context,
+                         std::string talkgadget_prefix);
+  virtual ~ConnectionBlockChecker() {}

[Sergey Ulanov, 2012/08/28 00:33:42]

move destructor implementation to the .cc file. clang bots will not like it
here.

[garykac, 2012/08/29 00:07:15]

Done.

+
+  Status GetStatus();
+
+ private:
+  // net::URLFetcherDelegate interface.
+  virtual void OnURLFetchComplete(const net::URLFetcher* source) OVERRIDE;
+
+  ChromotingHostContext* context_;
+
+  // URL fetcher used to verify access to the host talkgadget.
+  scoped_ptr<net::URLFetcher> url_fetcher_;
+
+  // The string pre-pended to '.talkgadget.google.com' to create the full
+  // talkgadget domain name for the host.
+  std::string talkgadget_prefix_;
+
+  // Did we make a successful connection to the host talkgadget?
+  Status status_;
+
+  // Are we currently in the middle of a check?
+  bool check_pending_;
+
+  // Number of times we've tried to reach the talkgadget.
+  int reconnect_attempts_;
+
+  DISALLOW_COPY_AND_ASSIGN(ConnectionBlockChecker);
+ };

[Sergey Ulanov, 2012/08/28 00:33:42]

nit: incorrect indentation

[garykac, 2012/08/29 00:07:15]

Done.

+
+}  // namespace remoting
+
+#endif  // REMOTING_HOST_CONNECTION_BLOCK_CHECKER_H_