Base infrastructure for Networking Private API on Windows and Mac.

chrome/browser/extensions/api/networking_private/networking_private_service_client.h

Index: chrome/browser/extensions/api/networking_private/networking_private_service_client.h
diff --git a/chrome/browser/extensions/api/networking_private/networking_private_service_client.h b/chrome/browser/extensions/api/networking_private/networking_private_service_client.h
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+++ b/chrome/browser/extensions/api/networking_private/networking_private_service_client.h
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+// Copyright 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 CHROME_BROWSER_EXTENSIONS_API_NETWORKING_PRIVATE_NETWORKING_PRIVATE_SERVICE_CLIENT_H_
+#define CHROME_BROWSER_EXTENSIONS_API_NETWORKING_PRIVATE_NETWORKING_PRIVATE_SERVICE_CLIENT_H_
+
+#include <string>
+#include <vector>
+
+#include "base/basictypes.h"
+#include "base/compiler_specific.h"
+#include "base/id_map.h"
+#include "base/memory/weak_ptr.h"
+#include "base/observer_list.h"
+#include "base/strings/string16.h"
+#include "base/supports_user_data.h"
+#include "base/threading/sequenced_worker_pool.h"
+#include "base/values.h"
+#include "components/browser_context_keyed_service/browser_context_keyed_service.h"
+#include "components/wifi/wifi_service.h"
+#include "content/public/browser/browser_thread.h"
+#include "content/public/browser/utility_process_host.h"
+#include "content/public/browser/utility_process_host_client.h"
+
+namespace base {
+class SequencedTaskRunner;
+}
+
+namespace wifi {
+class WiFiService;
+}
+
+namespace extensions {
+
+using wifi::WiFiService;
+
+// The client wrapper for the WiFiService and CryptoVerify interfaces to invoke
+// them on worker thread. Always used from UI thread only.
+class NetworkingPrivateServiceClient : public BrowserContextKeyedService {
+ public:
+  // Interface for Verify* methods implementation.
+  class CryptoVerify {
+   public:
+    CryptoVerify() {}
+    virtual ~CryptoVerify() {}
+
+    static CryptoVerify* Create();
+
+    virtual void VerifyDestination(scoped_ptr<base::ListValue> args,
+                                   bool* verified,
+                                   std::string* error) = 0;
+
+    virtual void VerifyAndEncryptData(scoped_ptr<base::ListValue> args,
+                                      std::string* base64_encoded_ciphertext,
+                                      std::string* error) = 0;
+   private:
+    DISALLOW_COPY_AND_ASSIGN(CryptoVerify);
+  };
+
+  // Interface for observing Network Events.
+  class Observer {
+   public:
+    Observer() {}
+    virtual ~Observer() {}
+
+    virtual void OnNetworksChangedEvent(
+        const std::vector<std::string>& network_guids) = 0;
+    virtual void OnNetworkListChangedEvent(
+        const std::vector<std::string>& network_guids) = 0;
+
+   private:
+    DISALLOW_COPY_AND_ASSIGN(Observer);
+  };
+
+  // An error callback used by most of API functions to receive error results
+  // from the NetworkingPrivateServiceClient.
+  typedef base::Callback<
+      void(const std::string& error_name,
+           scoped_ptr<base::DictionaryValue> error_data)> ErrorCallback;
+
+  // An error callback used by most of Crypto Verify* API functions to receive
+  // error results from the NetworkingPrivateServiceClient.
+  // TODO(mef): Cleanup networking_private_api.* to make consistent
+  // NetworkingPrivateXXXFunction naming and error callbacks.
+  typedef base::Callback<
+      void(const std::string& error_name,
+           const std::string& error)> CryptoErrorCallback;
+
+  // Callback used to return bool result from VerifyDestination function.
+  typedef base::Callback<void(bool result)> BoolResultCallback;
+
+  // Callback used to return string result from VerifyAndEncryptData function.
+  typedef base::Callback<void(const std::string& result)> StringResultCallback;
+
+  // Callback used to return Dictionary of network properties.
+  typedef base::Callback<
+      void(const std::string& network_guid,
+           const base::DictionaryValue& dictionary)> DictionaryResultCallback;
+
+  // Callback used to return List of visibile networks.
+  typedef base::Callback<
+      void(const base::ListValue& network_list)> ListResultCallback;
+
+  // Takes ownership of |wifi_service| and |crypto_verify|. They are accessed
+  // and deleted on the worker thread. The deletion task is posted during the
+  // NetworkingPrivateServiceClient shutdown.
+  NetworkingPrivateServiceClient(wifi::WiFiService* wifi_service,
+                                 CryptoVerify* crypto_verify);
+
+  // BrowserContextKeyedServices method override.
+  virtual void Shutdown() OVERRIDE;
+
+  // Gets the properties of the network with id |service_path|. See note on
+  // |callback| and |error_callback|, in class description above.
+  void GetProperties(const std::string& service_path,
+                     const DictionaryResultCallback& callback,
+                     const ErrorCallback& error_callback);
+
+  // Start connect to the network with id |service_path|. See note on
+  // |callback| and |error_callback|, in class description above.
+  void StartConnect(const std::string& service_path,
+                    const base::Closure& callback,
+                    const ErrorCallback& error_callback);
+
+  // Start disconnect from the network with id |service_path|. See note on
+  // |callback| and |error_callback|, in class description above.
+  void StartDisconnect(const std::string& service_path,
+                       const base::Closure& callback,
+                       const ErrorCallback& error_callback);
+
+  // Sets the |properties| of the network with id |service_path|. See note on
+  // |callback| and |error_callback|, in class description above.
+  void SetProperties(const std::string& service_path,
+                     const base::DictionaryValue& properties,
+                     const base::Closure& callback,
+                     const ErrorCallback& error_callback);
+
+  // Requests network scan. Broadcasts NetworkListChangedEvent upon completion.
+  void RequestNetworkScan();
+
+  // Gets the list of visible networks and calls |callback|.
+  void GetVisibleNetworks(const ListResultCallback& callback);
+
+  // Verify that Chromecast provides valid cryptographically signed properties.
+  void VerifyDestination(scoped_ptr<base::ListValue> args,
+                         const BoolResultCallback& callback,
+                         const CryptoErrorCallback& error_callback);
+
+  // Verify that Chromecast provides valid cryptographically signed properties.
+  // If valid, then encrypt data using Chromecast's public key.
+  void VerifyAndEncryptData(scoped_ptr<base::ListValue> args,
+                            const StringResultCallback& callback,
+                            const CryptoErrorCallback& error_callback);
+
+  // Adds observer to network events.
+  void AddObserver(Observer* network_events_observer);
+
+  // Removes observer to network events. If there is no observers,
+  // then process can be shut down when there are no more calls pending return.
+  void RemoveObserver(Observer* network_events_observer);
+
+ private:
+  // Callbacks to extension api function objects. Keep reference to API object
+  // and are released in ShutdownOnUIThread. Run when WiFiService calls back
+  // into NetworkingPrivateServiceClient's callback wrappers.
+  typedef int32 ServiceCallbacksID;
+  struct ServiceCallbacks {
+    ServiceCallbacks();
+    ~ServiceCallbacks();
+
+    DictionaryResultCallback get_properties_callback;
+    base::Closure start_connect_callback;
+    base::Closure start_disconnect_callback;
+    base::Closure set_properties_callback;
+    ListResultCallback get_visible_networks_callback;
+    ErrorCallback error_callback;
+
+    BoolResultCallback verify_destination_callback;
+    StringResultCallback verify_and_encrypt_data_callback;
+    CryptoErrorCallback crypto_error_callback;
+
+    ServiceCallbacksID id;
+  };
+  typedef IDMap<ServiceCallbacks, IDMapOwnPointer> ServiceCallbacksMap;
+
+  virtual ~NetworkingPrivateServiceClient();
+
+  // Callback wrappers.
+  void AfterGetProperties(ServiceCallbacksID callback_id,
+                          const std::string& network_guid,
+                          const DictionaryValue* properties,
+                          const std::string* error);
+  void AfterSetProperties(ServiceCallbacksID callback_id,
+                          const std::string* error);
+  void AfterGetVisibleNetworks(ServiceCallbacksID callback_id,
+                               const ListValue* network_list);
+  void AfterStartConnect(ServiceCallbacksID callback_id,
+                         const std::string* error);
+  void AfterStartDisconnect(ServiceCallbacksID callback_id,
+                            const std::string* error);
+  void AfterVerifyDestination(ServiceCallbacksID callback_id,
+                              const bool* result,
+                              const std::string* error);
+  void AfterVerifyAndEncryptData(ServiceCallbacksID callback_id,
+                                 const std::string* result,
+                                 const std::string* error);
+
+  void OnNetworksChangedEventOnUIThread(
+      const WiFiService::NetworkGuidList& network_guid_list);
+  void OnNetworkListChangedEventOnUIThread(
+      const WiFiService::NetworkGuidList& network_guid_list);
+
+  // Add new |ServiceCallbacks| to |callbacks_map_|.
+  ServiceCallbacks* AddServiceCallbacks();
+  // Removes ServiceCallbacks for |callback_id| from |callbacks_map_|.
+  void RemoveServiceCallbacks(ServiceCallbacksID callback_id);
+
+  // Callbacks to run when callback is called from WiFiService.
+  ServiceCallbacksMap callbacks_map_;
+  // Observers to Network Events.
+  ObserverList<Observer> network_events_observers_;
+  // Interface for Verify* methods. Used and deleted on the worker thread.
+  scoped_ptr<CryptoVerify> crypto_verify_;
+  // Interface to WiFiService. Used and deleted on the worker thread.
+  scoped_ptr<wifi::WiFiService> wifi_service_;
+  // Sequence token associated with wifi tasks.
+  base::SequencedWorkerPool::SequenceToken sequence_token_;
+  // Task runner for worker tasks.
+  scoped_refptr<base::SequencedTaskRunner> task_runner_;
+  // Use WeakPtrs for callbacks from |wifi_service_| and |crypto_verify_|.
+  base::WeakPtrFactory<NetworkingPrivateServiceClient> weak_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(NetworkingPrivateServiceClient);
+};
+
+}  // namespace extensions
+
+#endif  // CHROME_BROWSER_EXTENSIONS_API_NETWORKING_PRIVATE_NETWORKING_PRIVATE_SERVICE_CLIENT_H_