chromeos/dbus/bluetooth_profile_service_provider.h

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CHROMEOS_DBUS_BLUETOOTH_PROFILE_SERVICE_PROVIDER_H_
   6 #define CHROMEOS_DBUS_BLUETOOTH_PROFILE_SERVICE_PROVIDER_H_
   7
   8 #include <string>
   9
  10 #include "base/basictypes.h"
  11 #include "base/callback.h"
  12 #include "base/memory/scoped_ptr.h"
  13 #include "chromeos/chromeos_export.h"
  14 #include "dbus/bus.h"
  15 #include "dbus/file_descriptor.h"
  16 #include "dbus/object_path.h"
  17
  18 namespace chromeos {
  19
  20 // BluetoothProfileServiceProvider is used to provide a D-Bus object that the
  21 // Bluetooth daemon can communicate with to connect application profiles.
  22 //
  23 // Instantiate with a chosen D-Bus object path and delegate object, and pass
  24 // the D-Bus object path as the |agent_path| argument to the
  25 // chromeos::BluetoothProfileManagerClient::RegisterProfile() method.
  26 //
  27 // When an incoming profile connection occurs, or after initiating a connection
  28 // using the chromeos::BluetoothDeviceClient::ConnectProfile() method, the
  29 // Bluetooth daemon will make calls to this profile object and they will be
  30 // passed on to your Delegate object for handling. Responses should be returned
  31 // using the callbacks supplied to those methods.
  32 class CHROMEOS_EXPORT BluetoothProfileServiceProvider {
  33  public:
  34   // Interface for reacting to profile requests.
  35   class Delegate {
  36    public:
  37     virtual ~Delegate() {}
  38
  39     // Possible status values that may be returned to callbacks on a new
  40     // connection or a requested disconnection. Success indicates acceptance,
  41     // reject indicates the user rejected or denied the request; cancelled
  42     // means the user cancelled the request without confirming either way.
  43     enum Status {
  44       SUCCESS,
  45       REJECTED,
  46       CANCELLED
  47     };
  48
  49     // Connection-specific options.
  50     struct CHROMEOS_EXPORT Options {
  51       Options() {}
  52       ~Options() {}
  53
  54       // Profile version.
  55       uint16 version;
  56
  57       // Profile features.
  58       uint16 features;
  59     };
  60
  61     // The ConfirmationCallback is used for methods which require confirmation;
  62     // it should be called with one argument, the |status| of the request
  63     // (success, rejected or cancelled).
  64     typedef base::Callback<void(Status)> ConfirmationCallback;
  65
  66     // This method will be called when the profile is unregistered from the
  67     // Bluetooth daemon, generally at shutdown or at the applications' request.
  68     // It may be used to perform cleanup tasks.
  69     virtual void Release() = 0;
  70
  71     // This method will be called when a profile connection to the device
  72     // with object path |device_path| is established. |callback| must be called
  73     // to confirm the connection, or indicate rejection or cancellation.
  74     //
  75     // A file descriptor for the connection socket is provided in |fd|, and
  76     // details about the specific implementation of the profile in |options|.
  77     //
  78     // IMPORTANT: Ownership of the file descriptor object |fd| is passed to
  79     // the delegate by this call. The delegate is responsible for checking the
  80     // validity of |fd| on a thread where I/O is permitted before taking the
  81     // value. If the value is not taken, the file descriptor is closed.
  82     //
  83     // Ownership of |options| is NOT passed so information out of it must be
  84     // copied if required.
  85     virtual void NewConnection(const dbus::ObjectPath& device_path,
  86                                scoped_ptr<dbus::FileDescriptor> fd,
  87                                const Options& options,
  88                                const ConfirmationCallback& callback) = 0;
  89
  90     // This method will be called when a profile connection to the device
  91     // with object path |device_path| is disconnected. Any file descriptors
  92     // owned by the service should be cleaned up and |callback| called to
  93     // confirm, or indicate rejection or cancellation of the disconnection.
  94     virtual void RequestDisconnection(const dbus::ObjectPath& device_path,
  95                                       const ConfirmationCallback& callback) = 0;
  96
  97     // This method will be called by the Bluetooth daemon to indicate that
  98     // a profile request failed before a reply was returned from the device.
  99     virtual void Cancel() = 0;
 100   };
 101
 102   virtual ~BluetoothProfileServiceProvider();
 103
 104   // Creates the instance where |bus| is the D-Bus bus connection to export
 105   // the object onto, |object_path| is the object path that it should have
 106   // and |delegate| is the object to which all method calls will be passed
 107   // and responses generated from.
 108   static BluetoothProfileServiceProvider* Create(
 109       dbus::Bus* bus,
 110       const dbus::ObjectPath& object_path,
 111       Delegate* delegate);
 112
 113  protected:
 114   BluetoothProfileServiceProvider();
 115
 116  private:
 117   DISALLOW_COPY_AND_ASSIGN(BluetoothProfileServiceProvider);
 118 };
 119
 120 }  // namespace chromeos
 121
 122 #endif  // CHROMEOS_DBUS_BLUETOOTH_PROFILE_SERVICE_PROVIDER_H_