Add NetworkConnectionHandler class

chromeos/network/network_connection_handler.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 CHROMEOS_NETWORK_NETWORK_CONNECTION_HANDLER_H_
+#define CHROMEOS_NETWORK_NETWORK_CONNECTION_HANDLER_H_
+
+#include <set>
+#include <string>
+
+#include "base/basictypes.h"
+#include "base/callback.h"
+#include "base/memory/weak_ptr.h"
+#include "base/values.h"
+#include "chromeos/chromeos_export.h"
+#include "chromeos/dbus/dbus_method_call_status.h"
+#include "chromeos/network/network_handler_callbacks.h"
+
+namespace chromeos {
+
+class NetworkState;
+
+// The NetworkConnectionHandler class is used to manage network connection
+// requests. This is the only class that should make Shill Connect calls.
+// It handles the following steps:
+// 1. Determine whether or not sufficient information (e.g. passphrase) is
+//    known to be available to connect to the network.
+// 2. Request additional information (e.g. user data which contains certificate
+//    information) and determine whether sufficient information is available.
+// 3. Send the connect request.
+// 4. Invoke the appropriate callback (always) on success or failure.
+//
+// NetworkConnectionHandler depends on NetworkStateHandler for immediately
+// available State information, and NetworkConfigurationHandler for any
+// configuration calls.
+
+class CHROMEOS_EXPORT NetworkConnectionHandler
+    : public base::SupportsWeakPtr<NetworkConnectionHandler> {
+ public:
+  // Sets the global instance. Must be called before any calls to Get().
+  static void Initialize();
+
+  // Destroys the global instance.
+  static void Shutdown();
+
+  // Gets the global instance. Initialize() must be called first.
+  static NetworkConnectionHandler* Get();
+
+  // ConnectToNetwork() will start an asynchronous connection attempt.
+  // On success, |success_callback| will be called.
+  // On failure, |error_callback| will be called with |error_name| one of:
+  //  kNetworkNotFound if no network matching |service_path| is found
+  //    (hidden networks must be configured before connecting).
+  //  kConnected if already connected to the network.
+  //  kConnecting if already connecting to the network.
+  //  kCertificateRequired if the network requires a cert and none exists.
+  //  kPassphraseRequired if passphrase only is required.
+  //  kConfigurationRequired if additional configuration is required.
+  //  kShillError if a DBus or Shill error occurred.
+  // |error_message| will contain an additional error string for debugging.
+  void ConnectToNetwork(const std::string& service_path,
+                        const base::Closure& success_callback,
+                        const network_handler::ErrorCallback& error_callback);
+
+  // DisconnectToNetwork() will send a Disconnect request to Shill.
+  // On success, |success_callback| will be called.
+  // On failure, |error_callback| will be called with |error_name| one of:
+  //  kNetworkNotFound if no network matching |service_path| is found.
+  //  kNotConnected if not connected to the network.
+  //  kShillError if a DBus or Shill error occurred.
+  // |error_message| will contain and additional error string for debugging.
+  void DisconnectNetwork(const std::string& service_path,
+                         const base::Closure& success_callback,
+                         const network_handler::ErrorCallback& error_callback);
+
+  // Constants for |error_name| from |error_callback| for Connect/Disconnect.
+  static const char kNetworkNotFound[];
+  static const char kConnected[];
+  static const char kConnecting[];
+  static const char kNotConnected[];
+  static const char kPassphraseRequired[];
+  static const char kActivationRequired[];
+  static const char kCertificateRequired[];
+  static const char kConfigurationRequired[];
+  static const char kShillError[];
+
+ private:
+  NetworkConnectionHandler();
+  ~NetworkConnectionHandler();
+
+  // Calls Shill.Manager.Connect asynchronously.
+  void CallShillConnect(
+      const std::string& service_path,
+      const base::Closure& success_callback,
+      const network_handler::ErrorCallback& error_callback);
+
+  // Calls Shill.Manager.Disconnect asynchronously.
+  void CallShillDisconnect(
+      const std::string& service_path,
+      const base::Closure& success_callback,
+      const network_handler::ErrorCallback& error_callback);
+
+  // Callback to Shill.Service.GetProperties. Parses properties to determine
+  // whether to invoke |error_callback|, or attemt a connection.
+  void GetPropertiesCallback(
+      const base::Closure& success_callback,
+      const network_handler::ErrorCallback& error_callback,
+      const std::string& service_path,
+      const base::DictionaryValue& properties);
+
+  // Sets the property for the service with an empty callback (logs errors).
+  void SetServiceProperty(const std::string& service_path,
+                          const std::string& property,
+                          const std::string& value) const;
+
+  // Handle failure from ConfigurationHandler calls.
+  void HandleConfigurationFailure(
+      const std::string& service_path,
+      const network_handler::ErrorCallback& error_callback,
+      const std::string& error_name,
+      scoped_ptr<base::DictionaryValue> error_data);
+
+  // Handle success or failure from Shill.Service.Connect.
+  void HandleShillSuccess(const std::string& service_path,
+                          const base::Closure& success_callback);
+  void HandleShillFailure(const std::string& service_path,
+                          const network_handler::ErrorCallback& error_callback,
+                          const std::string& error_name,
+                          const std::string& error_message);
+
+  // Set of pending connect requests, used to prevent repeat attempts while
+  // waiting for Shill.
+  std::set<std::string> pending_requests_;
+
+  DISALLOW_COPY_AND_ASSIGN(NetworkConnectionHandler);
+};
+
+}  // namespace chromeos
+
+#endif  // CHROMEOS_NETWORK_NETWORK_CONNECTION_HANDLER_H_