BlueZ-5.58

Introduction to BlueZ

The BlueZ package contains the Bluetooth protocol stack for Linux.

This package is known to build and work properly using an LFS-10.1 platform.

Package Information

BlueZ Dependencies

Required

dbus-1.12.20, GLib-2.68.2, and libical-3.0.10

User Notes: https://wiki.linuxfromscratch.org/blfs/wiki/bluez

Kernel Configuration

If you are building this package to use bluetooth devices (rather than as a build dependency), enable the following options in the kernel configuration, also the options below the next paragraph if you intend to run the tests, and recompile the kernel if necessary:


General Setup --->
  [*] Configure standard kernel features (expert users)               [CONFIG_EXPERT]
    [*] Enable timerfd() system call               [CONFIG_TIMERFD]
    [*] Enable eventfd() system call               [CONFIG_EVENTFD]

[*] Networking support --->                [CONFIG_NET]
  <*/M> Bluetooth subsystem support --->    [CONFIG_BT]
    <*/M> RFCOMM protocol support          [CONFIG_BT_RFCOMM]
    [*]   RFCOMM TTY support               [CONFIG_BT_RFCOMM_TTY]
    <*/M> BNEP protocol support            [CONFIG_BT_BNEP]
    [*]   Multicast filter support         [CONFIG_BT_BNEP_MC_FILTER]
    [*]   Protocol filter support          [CONFIG_BT_BNEP_PROTO_FILTER]
    <*/M> HIDP protocol support            [CONFIG_BT_HIDP]
        Bluetooth device drivers --->
          (Select the appropriate drivers for your Bluetooth hardware)

   <*/M> RF switch subsystem support ----   [CONFIG_RFKILL]

-*- Cryptographic API --->
   <*/M*> User-space cryptographic algorithm configuration         [CONFIG_CRYPTO_USER]
   <*/M*> User-space interface for hash algorithms                 [CONFIG_CRYPTO_USER_API_HASH]
   <*/M*> User-space interface for symmetric key cipher algorithms [CONFIG_CRYPTO_USER_API_SKCIPHER]
   <*/M*> MD5 digest algorithm                                     [CONFIG_CRYPTO_MD5]
   <*/M*> SHA1 digest algorithm                                    [CONFIG_CRYPTO_SHA1]

Security Options --->
  <*/M*> Diffie-Hellman operations on retained keys [CONFIG_KEY_DH_OPERATIONS]

Installation of BlueZ

Install BlueZ by running the following commands:

./configure --prefix=/usr         \
            --sysconfdir=/etc     \
            --localstatedir=/var  \
            --enable-library      &&
make

To test the results, issue: make check.

Now, as the root user:

make install &&
ln -svf ../libexec/bluetooth/bluetoothd /usr/sbin

Install the main configuration file as the root user:

install -v -dm755 /etc/bluetooth &&
install -v -m644 src/main.conf /etc/bluetooth/main.conf

If desired, install the API documentation as the root user:

install -v -dm755 /usr/share/doc/bluez-5.58 &&
install -v -m644 doc/*.txt /usr/share/doc/bluez-5.58

Command Explanations

--enable-library: This switch enables building the BlueZ 4 compatibility library which is required by some applications.

ln -svf ../libexec/bluetooth/bluetoothd /usr/sbin: This command makes access to the bluetooth daemon more convenient.

Configuring BlueZ

Configuration Files

/etc/bluetooth/mail.conf is installed automatically during the installation. Additionally, there are two supplementary configuration files. In addition, you can optionally install the following files, as the root user:

cat > /etc/bluetooth/rfcomm.conf << "EOF"
# Start rfcomm.conf
# Set up the RFCOMM configuration of the Bluetooth subsystem in the Linux kernel.
# Use one line per command
# See the rfcomm man page for options


# End of rfcomm.conf
EOF
cat > /etc/bluetooth/uart.conf << "EOF"
# Start uart.conf
# Attach serial devices via UART HCI to BlueZ stack
# Use one line per device
# See the hciattach man page for options

# End of uart.conf
EOF

Systemd Bluez Services

To start the bluetoothd daemon at boot, enable the previously installed systemd unit by running the following command as the root user:

systemctl enable bluetooth

To start the obexd daemon for a user session (to support some Bluetooth programs using it), enable the previously installed systemd unit for all users by running the following command as the root user:

systemctl enable --global obex
[Note]

Note

Systemd will start the Bluetooth daemon only when a bluetooth device is detected on the system.

Contents

Installed Programs: bluemoon, bluetoothctl, bluetoothd (symlink), btattach, btmon, hex2hcd, l2ping, l2test, mpris-proxy, and rctest
Installed Library: libbluetooth.so
Installed Directories: /etc/bluetooth, /usr/{include,libexec}/bluetooth, and /usr/share/doc/bluez-5.58

Short Descriptions

bluemoon

is a Bluemoon configuration utility

bluetoothctl

is the interactive Bluetooth control program

bluetoothd

is the Bluetooth daemon

btmon

provides access to the Bluetooth subsystem monitor infrastructure for reading HCI traces

hex2hcd

is used to convert a file needed by Broadcom devices to hcd (Broadcom bluetooth firmware) format

l2ping

is used to send a L2CAP echo request to the Bluetooth MAC address given in dotted hex notation

l2test

is a L2CAP testing program

rctest

is used to test RFCOMM communications on the Bluetooth stack

libbluetooth.so

contains the BlueZ 4 API functions

Last updated on Sat May 1 12:29:36 2021 -