src/device/bluetooth/bluetooth_device_mac.mm

   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 #include "device/bluetooth/bluetooth_device_mac.h"
   6
   7 #include <string>
   8
   9 #include "base/basictypes.h"
  10 #include "base/bind.h"
  11 #include "base/hash.h"
  12 #include "base/mac/sdk_forward_declarations.h"
  13 #include "base/sequenced_task_runner.h"
  14 #include "base/strings/string_number_conversions.h"
  15 #include "base/strings/string_util.h"
  16 #include "base/strings/sys_string_conversions.h"
  17 #include "device/bluetooth/bluetooth_socket_mac.h"
  18 #include "device/bluetooth/bluetooth_uuid.h"
  19
  20 // Undocumented API for accessing the Bluetooth transmit power level.
  21 // Similar to the API defined here [ http://goo.gl/20Q5vE ].
  22 @interface IOBluetoothHostController (UndocumentedAPI)
  23 - (IOReturn)
  24     BluetoothHCIReadTransmitPowerLevel:(BluetoothConnectionHandle)connection
  25                                 inType:(BluetoothHCITransmitPowerLevelType)type
  26                  outTransmitPowerLevel:(BluetoothHCITransmitPowerLevel*)level;
  27 @end
  28
  29 namespace device {
  30 namespace {
  31
  32 // Returns the first (should be, only) UUID contained within the
  33 // |service_class_data|. Returns an invalid (empty) UUID if none is found.
  34 BluetoothUUID ExtractUuid(IOBluetoothSDPDataElement* service_class_data) {
  35   NSArray* inner_elements = [service_class_data getArrayValue];
  36   IOBluetoothSDPUUID* sdp_uuid = nil;
  37   for (IOBluetoothSDPDataElement* inner_element in inner_elements) {
  38     if ([inner_element getTypeDescriptor] == kBluetoothSDPDataElementTypeUUID) {
  39       sdp_uuid = [[inner_element getUUIDValue] getUUIDWithLength:16];
  40       break;
  41     }
  42   }
  43
  44   if (!sdp_uuid)
  45     return BluetoothUUID();
  46
  47   const uint8* uuid_bytes = reinterpret_cast<const uint8*>([sdp_uuid bytes]);
  48   std::string uuid_str = base::HexEncode(uuid_bytes, 16);
  49   DCHECK_EQ(uuid_str.size(), 32U);
  50   uuid_str.insert(8, "-");
  51   uuid_str.insert(13, "-");
  52   uuid_str.insert(18, "-");
  53   uuid_str.insert(23, "-");
  54   return BluetoothUUID(uuid_str);
  55 }
  56
  57 }  // namespace
  58
  59 BluetoothDeviceMac::BluetoothDeviceMac(IOBluetoothDevice* device)
  60     : device_([device retain]) {
  61 }
  62
  63 BluetoothDeviceMac::~BluetoothDeviceMac() {
  64 }
  65
  66 uint32 BluetoothDeviceMac::GetBluetoothClass() const {
  67   return [device_ classOfDevice];
  68 }
  69
  70 std::string BluetoothDeviceMac::GetDeviceName() const {
  71   return base::SysNSStringToUTF8([device_ name]);
  72 }
  73
  74 std::string BluetoothDeviceMac::GetAddress() const {
  75   return GetDeviceAddress(device_);
  76 }
  77
  78 BluetoothDevice::VendorIDSource BluetoothDeviceMac::GetVendorIDSource() const {
  79   return VENDOR_ID_UNKNOWN;
  80 }
  81
  82 uint16 BluetoothDeviceMac::GetVendorID() const {
  83   return 0;
  84 }
  85
  86 uint16 BluetoothDeviceMac::GetProductID() const {
  87   return 0;
  88 }
  89
  90 uint16 BluetoothDeviceMac::GetDeviceID() const {
  91   return 0;
  92 }
  93
  94 int BluetoothDeviceMac::GetRSSI() const {
  95   if (![device_ isConnected]) {
  96     NOTIMPLEMENTED();
  97     return kUnknownPower;
  98   }
  99
 100   int rssi = [device_ rawRSSI];
 101
 102   // The API guarantees that +127 is returned in case the RSSI is not readable:
 103   // http://goo.gl/bpURYv
 104   if (rssi == 127)
 105     return kUnknownPower;
 106
 107   return rssi;
 108 }
 109
 110 int BluetoothDeviceMac::GetCurrentHostTransmitPower() const {
 111   return GetHostTransmitPower(kReadCurrentTransmitPowerLevel);
 112 }
 113
 114 int BluetoothDeviceMac::GetMaximumHostTransmitPower() const {
 115   return GetHostTransmitPower(kReadMaximumTransmitPowerLevel);
 116 }
 117
 118 bool BluetoothDeviceMac::IsPaired() const {
 119   return [device_ isPaired];
 120 }
 121
 122 bool BluetoothDeviceMac::IsConnected() const {
 123   return [device_ isConnected];
 124 }
 125
 126 bool BluetoothDeviceMac::IsConnectable() const {
 127   return false;
 128 }
 129
 130 bool BluetoothDeviceMac::IsConnecting() const {
 131   return false;
 132 }
 133
 134 BluetoothDevice::UUIDList BluetoothDeviceMac::GetUUIDs() const {
 135   UUIDList uuids;
 136   for (IOBluetoothSDPServiceRecord* service_record in [device_ services]) {
 137     IOBluetoothSDPDataElement* service_class_data =
 138         [service_record getAttributeDataElement:
 139             kBluetoothSDPAttributeIdentifierServiceClassIDList];
 140     if ([service_class_data getTypeDescriptor] ==
 141             kBluetoothSDPDataElementTypeDataElementSequence) {
 142       BluetoothUUID uuid = ExtractUuid(service_class_data);
 143       if (uuid.IsValid())
 144         uuids.push_back(uuid);
 145     }
 146   }
 147   return uuids;
 148 }
 149
 150 bool BluetoothDeviceMac::ExpectingPinCode() const {
 151   NOTIMPLEMENTED();
 152   return false;
 153 }
 154
 155 bool BluetoothDeviceMac::ExpectingPasskey() const {
 156   NOTIMPLEMENTED();
 157   return false;
 158 }
 159
 160 bool BluetoothDeviceMac::ExpectingConfirmation() const {
 161   NOTIMPLEMENTED();
 162   return false;
 163 }
 164
 165 void BluetoothDeviceMac::Connect(
 166     PairingDelegate* pairing_delegate,
 167     const base::Closure& callback,
 168     const ConnectErrorCallback& error_callback) {
 169   NOTIMPLEMENTED();
 170 }
 171
 172 void BluetoothDeviceMac::SetPinCode(const std::string& pincode) {
 173   NOTIMPLEMENTED();
 174 }
 175
 176 void BluetoothDeviceMac::SetPasskey(uint32 passkey) {
 177   NOTIMPLEMENTED();
 178 }
 179
 180 void BluetoothDeviceMac::ConfirmPairing() {
 181   NOTIMPLEMENTED();
 182 }
 183
 184 void BluetoothDeviceMac::RejectPairing() {
 185   NOTIMPLEMENTED();
 186 }
 187
 188 void BluetoothDeviceMac::CancelPairing() {
 189   NOTIMPLEMENTED();
 190 }
 191
 192 void BluetoothDeviceMac::Disconnect(const base::Closure& callback,
 193                                     const ErrorCallback& error_callback) {
 194   NOTIMPLEMENTED();
 195 }
 196
 197 void BluetoothDeviceMac::Forget(const ErrorCallback& error_callback) {
 198   NOTIMPLEMENTED();
 199 }
 200
 201 void BluetoothDeviceMac::ConnectToService(
 202     const BluetoothUUID& uuid,
 203     const ConnectToServiceCallback& callback,
 204     const ConnectToServiceErrorCallback& error_callback) {
 205   scoped_refptr<BluetoothSocketMac> socket = BluetoothSocketMac::CreateSocket();
 206   socket->Connect(
 207       device_.get(), uuid, base::Bind(callback, socket), error_callback);
 208 }
 209
 210 void BluetoothDeviceMac::CreateGattConnection(
 211       const GattConnectionCallback& callback,
 212       const ConnectErrorCallback& error_callback) {
 213   // TODO(armansito): Implement.
 214   error_callback.Run(ERROR_UNSUPPORTED_DEVICE);
 215 }
 216
 217 void BluetoothDeviceMac::StartConnectionMonitor(
 218     const base::Closure& callback,
 219     const ErrorCallback& error_callback) {
 220   NOTIMPLEMENTED();
 221 }
 222
 223 NSDate* BluetoothDeviceMac::GetLastInquiryUpdate() {
 224   return [device_ getLastInquiryUpdate];
 225 }
 226
 227 int BluetoothDeviceMac::GetHostTransmitPower(
 228     BluetoothHCITransmitPowerLevelType power_level_type) const {
 229   IOBluetoothHostController* controller =
 230       [IOBluetoothHostController defaultController];
 231
 232   // Bail if the undocumented API is unavailable on this machine.
 233   SEL selector = @selector(
 234       BluetoothHCIReadTransmitPowerLevel:inType:outTransmitPowerLevel:);
 235   if (![controller respondsToSelector:selector])
 236     return kUnknownPower;
 237
 238   BluetoothHCITransmitPowerLevel power_level;
 239   IOReturn result =
 240       [controller BluetoothHCIReadTransmitPowerLevel:[device_ connectionHandle]
 241                                               inType:power_level_type
 242                                outTransmitPowerLevel:&power_level];
 243   if (result != kIOReturnSuccess)
 244     return kUnknownPower;
 245
 246   return power_level;
 247 }
 248
 249 // static
 250 std::string BluetoothDeviceMac::GetDeviceAddress(IOBluetoothDevice* device) {
 251   return CanonicalizeAddress(base::SysNSStringToUTF8([device addressString]));
 252 }
 253
 254 }  // namespace device