| // 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_SIGNALING_CONNECTOR_H_ |
| #define REMOTING_HOST_SIGNALING_CONNECTOR_H_ |
| |
| #include "base/macros.h" |
| #include "base/memory/weak_ptr.h" |
| #include "base/sequence_checker.h" |
| #include "base/timer/timer.h" |
| #include "net/base/network_change_notifier.h" |
| #include "remoting/base/oauth_token_getter.h" |
| #include "remoting/signaling/xmpp_signal_strategy.h" |
| |
| namespace remoting { |
| |
| class DnsBlackholeChecker; |
| |
| // SignalingConnector listens for SignalStrategy status notifications |
| // and attempts to keep it connected when possible. When signalling is |
| // not connected it keeps trying to reconnect it until it is |
| // connected. It limits connection attempt rate using exponential |
| // backoff. It also monitors network state and reconnects signalling |
| // whenever connection type changes or IP address changes. |
| class SignalingConnector |
| : public SignalStrategy::Listener, |
| public net::NetworkChangeNotifier::ConnectionTypeObserver, |
| public net::NetworkChangeNotifier::IPAddressObserver { |
| public: |
| // The |auth_failed_callback| is called when authentication fails. |
| SignalingConnector(XmppSignalStrategy* signal_strategy, |
| std::unique_ptr<DnsBlackholeChecker> dns_blackhole_checker, |
| OAuthTokenGetter* oauth_token_getter, |
| const base::Closure& auth_failed_callback); |
| ~SignalingConnector() override; |
| |
| // OAuthTokenGetter callback. |
| void OnAccessToken(OAuthTokenGetter::Status status, |
| const std::string& user_email, |
| const std::string& access_token); |
| |
| // SignalStrategy::Listener interface. |
| void OnSignalStrategyStateChange(SignalStrategy::State state) override; |
| bool OnSignalStrategyIncomingStanza(const buzz::XmlElement* stanza) override; |
| |
| // NetworkChangeNotifier::ConnectionTypeObserver interface. |
| void OnConnectionTypeChanged( |
| net::NetworkChangeNotifier::ConnectionType type) override; |
| |
| // NetworkChangeNotifier::IPAddressObserver interface. |
| void OnIPAddressChanged() override; |
| |
| private: |
| void OnNetworkError(); |
| void ScheduleTryReconnect(); |
| void ResetAndTryReconnect(); |
| void TryReconnect(); |
| void OnDnsBlackholeCheckerDone(bool allow); |
| |
| XmppSignalStrategy* signal_strategy_; |
| base::Closure auth_failed_callback_; |
| std::unique_ptr<DnsBlackholeChecker> dns_blackhole_checker_; |
| |
| OAuthTokenGetter* oauth_token_getter_; |
| |
| // Number of times we tried to connect without success. |
| int reconnect_attempts_; |
| |
| base::OneShotTimer timer_; |
| |
| SEQUENCE_CHECKER(sequence_checker_); |
| |
| base::WeakPtrFactory<SignalingConnector> weak_factory_; |
| |
| DISALLOW_COPY_AND_ASSIGN(SignalingConnector); |
| }; |
| |
| } // namespace remoting |
| |
| #endif // REMOTING_HOST_SIGNALING_CONNECTOR_H_ |