| // |
| // 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. |
| // |
| |
| #include "bluetooth_address.h" |
| |
| #include <android-base/logging.h> |
| #include <cutils/properties.h> |
| #include <fcntl.h> |
| #include <utils/Log.h> |
| |
| namespace android { |
| namespace hardware { |
| namespace bluetooth { |
| namespace V1_0 { |
| namespace dragon { |
| |
| void BluetoothAddress::bytes_to_string(const uint8_t* addr, char* addr_str) { |
| sprintf(addr_str, "%02x:%02x:%02x:%02x:%02x:%02x", addr[0], addr[1], addr[2], |
| addr[3], addr[4], addr[5]); |
| } |
| |
| bool BluetoothAddress::string_to_bytes(const char* addr_str, uint8_t* addr) { |
| if (addr_str == NULL) return false; |
| if (strnlen(addr_str, kStringLength) != kStringLength) return false; |
| unsigned char trailing_char = '\0'; |
| |
| return (sscanf(addr_str, "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx%1c", |
| &addr[0], &addr[1], &addr[2], &addr[3], &addr[4], &addr[5], |
| &trailing_char) == kBytes); |
| } |
| |
| bool BluetoothAddress::get_local_address(uint8_t* local_addr) { |
| char property[PROPERTY_VALUE_MAX] = {0}; |
| |
| // No factory BDADDR found. Look for a previously stored BDA. |
| if (property_get(PERSIST_BDADDR_PROPERTY, property, NULL) && |
| string_to_bytes(property, local_addr)) { |
| return true; |
| } |
| |
| // Look for an the WiFi MAC from an AzureWave module. |
| int wifi_mac_fd = open(AZW_WIFI_MAC_PATH, O_RDONLY); |
| if (wifi_mac_fd != -1) { |
| int bytes_read = read(wifi_mac_fd, property, kStringLength); |
| close(wifi_mac_fd); |
| if (bytes_read != kStringLength) return false; |
| |
| // Null terminate the string. |
| property[kStringLength] = '\0'; |
| |
| // Zero last bit to calculate the Bluetooth address. This works because the |
| // WiFi address is always odd (never ending in 0x0 or 0xa). |
| property[kStringLength - 1] = property[kStringLength - 1] - 1; |
| |
| ALOGD("%s: Got BDA from WiFi MAC %s", __func__, property); |
| return string_to_bytes(property, local_addr); |
| } |
| |
| return false; |
| } |
| |
| } // namespace dragon |
| } // namespace V1_0 |
| } // namespace bluetooth |
| } // namespace hardware |
| } // namespace android |