[CrOS Tether] Transform NetworkConnectionHandler to an interface.

chromeos/network/network_connection_handler_impl.h

+// Copyright (c) 2017 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 CHROMEOS_NETWORK_NETWORK_CONNECTION_HANDLER_IMPL_H_
+#define CHROMEOS_NETWORK_NETWORK_CONNECTION_HANDLER_IMPL_H_
+
+#include "chromeos/cert_loader.h"
+#include "chromeos/chromeos_export.h"
+#include "chromeos/dbus/dbus_method_call_status.h"
+#include "chromeos/login/login_state.h"
+#include "chromeos/network/network_connection_handler.h"
+#include "chromeos/network/network_state_handler_observer.h"
+
+namespace chromeos {
+
+// Implementation of NetworkConnectionHandler.
+class CHROMEOS_EXPORT NetworkConnectionHandlerImpl
+    : public NetworkConnectionHandler,
+      public LoginState::Observer,
+      public CertLoader::Observer,
+      public NetworkStateHandlerObserver,
+      public base::SupportsWeakPtr<NetworkConnectionHandlerImpl> {
+ public:
+  NetworkConnectionHandlerImpl();
+  ~NetworkConnectionHandlerImpl() override;
+
+  // NetworkConnectionHandler:
+  void ConnectToNetwork(const std::string& service_path,
+                        const base::Closure& success_callback,
+                        const network_handler::ErrorCallback& error_callback,
+                        bool check_error_state) override;
+  void DisconnectNetwork(
+      const std::string& service_path,
+      const base::Closure& success_callback,
+      const network_handler::ErrorCallback& error_callback) override;
+  bool HasConnectingNetwork(const std::string& service_path) override;
+  bool HasPendingConnectRequest() override;
+
+  // NetworkStateHandlerObserver
+  void NetworkListChanged() override;
+  void NetworkPropertiesUpdated(const NetworkState* network) override;
+
+  // LoginState::Observer
+  void LoggedInStateChanged() override;
+
+  // CertLoader::Observer
+  void OnCertificatesLoaded(const net::CertificateList& cert_list,
+                            bool initial_load) override;
+
+ protected:
+  void Init(NetworkStateHandler* network_state_handler,
+            NetworkConfigurationHandler* network_configuration_handler,
+            ManagedNetworkConfigurationHandler*
+                managed_network_configuration_handler) override;
+
+ private:
+  struct ConnectRequest {
+    ConnectRequest(const std::string& service_path,
+                   const std::string& profile_path,
+                   const base::Closure& success,
+                   const network_handler::ErrorCallback& error);
+    ~ConnectRequest();
+    explicit ConnectRequest(const ConnectRequest& other);
+
+    enum ConnectState {
+      CONNECT_REQUESTED = 0,
+      CONNECT_STARTED = 1,
+      CONNECT_CONNECTING = 2
+    };
+
+    std::string service_path;
+    std::string profile_path;
+    ConnectState connect_state;
+    base::Closure success_callback;
+    network_handler::ErrorCallback error_callback;
+  };
+
+  ConnectRequest* GetPendingRequest(const std::string& service_path);
+
+  // Callback from Shill.Service.GetProperties. Parses |properties| to verify
+  // whether or not the network appears to be configured. If configured,
+  // attempts a connection, otherwise invokes error_callback from
+  // pending_requests_[service_path]. |check_error_state| is passed from
+  // ConnectToNetwork(), see comment for info.
+  void VerifyConfiguredAndConnect(bool check_error_state,
+                                  const std::string& service_path,
+                                  const base::DictionaryValue& properties);
+
+  bool IsNetworkProhibitedByPolicy(const std::string& type,
+                                   const std::string& guid,
+                                   const std::string& profile_path);
+
+  // Queues a connect request until certificates have loaded.
+  void QueueConnectRequest(const std::string& service_path);
+
+  // Checks to see if certificates have loaded and if not, cancels any queued
+  // connect request and notifies the user.
+  void CheckCertificatesLoaded();
+
+  // Handles connecting to a queued network after certificates are loaded or
+  // handle cert load timeout.
+  void ConnectToQueuedNetwork();
+
+  // Calls Shill.Manager.Connect asynchronously.
+  void CallShillConnect(const std::string& service_path);
+
+  // Handles failure from ConfigurationHandler calls.
+  void HandleConfigurationFailure(
+      const std::string& service_path,
+      const std::string& error_name,
+      std::unique_ptr<base::DictionaryValue> error_data);
+
+  // Handles success or failure from Shill.Service.Connect.
+  void HandleShillConnectSuccess(const std::string& service_path);
+  void HandleShillConnectFailure(const std::string& service_path,
+                                 const std::string& error_name,
+                                 const std::string& error_message);
+
+  // Note: |service_path| is passed by value here, because in some cases
+  // the value may be located in the map and then it can be deleted, producing
+  // a reference to invalid memory.
+  void CheckPendingRequest(const std::string service_path);
+
+  void CheckAllPendingRequests();
+
+  // Look up the ConnectRequest for |service_path| and call
+  // InvokeConnectErrorCallback.
+  void ErrorCallbackForPendingRequest(const std::string& service_path,
+                                      const std::string& error_name);
+
+  // Calls Shill.Manager.Disconnect asynchronously.
+  void CallShillDisconnect(
+      const std::string& service_path,
+      const base::Closure& success_callback,
+      const network_handler::ErrorCallback& error_callback);
+
+  // Handle success from Shill.Service.Disconnect.
+  void HandleShillDisconnectSuccess(const std::string& service_path,
+                                    const base::Closure& success_callback);
+
+  // Local references to the associated handler instances.
+  CertLoader* cert_loader_;
+  NetworkStateHandler* network_state_handler_;
+  NetworkConfigurationHandler* configuration_handler_;
+  ManagedNetworkConfigurationHandler* managed_configuration_handler_;
+
+  // Map of pending connect requests, used to prevent repeated attempts while
+  // waiting for Shill and to trigger callbacks on eventual success or failure.
+  std::map<std::string, ConnectRequest> pending_requests_;
+  std::unique_ptr<ConnectRequest> queued_connect_;
+
+  // Track certificate loading state.
+  bool logged_in_;
+  bool certificates_loaded_;
+  base::TimeTicks logged_in_time_;
+
+  DISALLOW_COPY_AND_ASSIGN(NetworkConnectionHandlerImpl);
+};
+
+}  // namespace chromeos
+
+#endif  // CHROMEOS_NETWORK_NETWORK_CONNECTION_HANDLER_IMPL_H_