| #! /vendor/bin/sh |
| # Set Bluetooth address (BT_ADDR). |
| |
| # |
| # Copyright (C) 2023 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. |
| # |
| |
| # Get the unique board serial number from /proc/cmdline, |
| # prepend '0's to the serial number to fill 5 LSBs of the |
| # BT address and prepend "C0" as MSB to prepare a 6 byte |
| # Bluetooth Random Static Address. Reference: |
| # https://www.bluetooth.com/wp-content/uploads/2022/05/Bluetooth_LE_Primer_Paper.pdf [Page 23] |
| # |
| # Format the output in xx:xx:xx:xx:xx:xx format for the |
| # "bdaddr" command to work. |
| |
| BTADDR=`/vendor/bin/cat /proc/cmdline | vendor/bin/grep -o serialno.* |\ |
| /vendor/bin/cut -f2 -d'=' | /vendor/bin/awk '{printf("C0%010s\n", $1)}' |\ |
| /vendor/bin/sed 's/\(..\)/\1:/g' | /vendor/bin/sed '$s/:$//'` |
| |
| /vendor/bin/hw/bdaddr "${BTADDR}" |