bluetooth: Find the device's Bluetooth address

Test: bluetooth_hidl_hal_test
Change-Id: I5353aaef3f8c5db75e424a8e1b242b08d5a96c6e
diff --git a/bluetooth/1.0/default/bluetooth_address.h b/bluetooth/1.0/default/bluetooth_address.h
new file mode 100644
index 0000000..94bf616
--- /dev/null
+++ b/bluetooth/1.0/default/bluetooth_address.h
@@ -0,0 +1,61 @@
+//
+// Copyright 2016 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+#pragma once
+
+#include <fcntl.h>
+
+#include <cstdint>
+#include <string>
+#include <vector>
+
+namespace android {
+namespace hardware {
+namespace bluetooth {
+namespace V1_0 {
+namespace implementation {
+
+// The property key stores the storage location of Bluetooth Device Address
+static constexpr char PROPERTY_BT_BDADDR_PATH[] = "ro.bt.bdaddr_path";
+
+// Check for a legacy address stored as a property.
+static constexpr char PERSIST_BDADDR_PROPERTY[] =
+    "persist.service.bdroid.bdaddr";
+
+// If there is no valid bdaddr available from PROPERTY_BT_BDADDR_PATH and there
+// is no available persistent bdaddr available from PERSIST_BDADDR_PROPERTY,
+// use a factory set address.
+static constexpr char FACTORY_BDADDR_PROPERTY[] = "ro.boot.btmacaddr";
+
+// Encapsulate handling for Bluetooth Addresses:
+class BluetoothAddress {
+ public:
+  // Conversion constants
+  static constexpr size_t kStringLength = sizeof("XX:XX:XX:XX:XX:XX") - 1;
+  static constexpr size_t kBytes = (kStringLength + 1) / 3;
+
+  static void bytes_to_string(const uint8_t* addr, char* addr_str);
+
+  static bool string_to_bytes(const char* addr_str, uint8_t* addr);
+
+  static bool get_local_address(uint8_t* addr);
+};
+
+} // namespace implementation
+} // namespace V1_0
+} // namespace bluetooth
+} // namespace hardware
+} // namespace android