bdee39477d
Try to not expose bluetooth devices to external devices unless the user explicitly configures it, like any other radio/network device. Bluetooth has a long history of security problems and it is probably best to keep it disabled if not needed. Users who do use the bluetooth device should enable "discoverable" in bluetooth.device.conf(5) after this change. Keep in mind that bluetooth addresses can be discovered by passive monitoring or whole address-space scans[0], so a safety conscious user should also disable "connectable" in bluetooth.device.conf(5). [0]: https://www.sans.edu/cyber-research/security-laboratory/article/bluetooth Reviewed by: emax, hselasky Security: maybe Sponsored by: Dell EMC Isilon Differential Revision: https://reviews.freebsd.org/D12831
367 lines
9.1 KiB
Bash
Executable File
367 lines
9.1 KiB
Bash
Executable File
#!/bin/sh
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#
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# Copyright (c) 2005 Maksim Yevmenkin <m_evmenkin@yahoo.com>
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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# SUCH DAMAGE.
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#
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# $FreeBSD$
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# PROVIDE: bluetooth
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# REQUIRE: DAEMON
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# KEYWORD: nojail nostart
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. /etc/rc.subr
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name="bluetooth"
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desc="Bluetooth setup script"
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rcvar=
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start_cmd="bluetooth_start"
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stop_cmd="bluetooth_stop"
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required_modules="ng_bluetooth ng_hci ng_l2cap ng_btsocket"
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##############################################################################
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# Read and parse Bluetooth device configuration file
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##############################################################################
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bluetooth_read_conf()
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{
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local _err _file _line _namespace
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_file=$1
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_namespace=$2
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_err=0
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if [ ! -e $_file ]; then
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return 0
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fi
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if [ ! -f $_file -o ! -r $_file ]; then
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err 1 "Bluetooth configuration file $_file is not a file or not readable"
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fi
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while read _line
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do
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case "$_line" in
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\#*)
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continue
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;;
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*)
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if [ -z "$_line" ]; then
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continue;
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fi
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if expr "$_line" : "[a-zA-Z0-9_]*=" > /dev/null 2>&1; then
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eval "${_namespace}${_line}"
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else
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warn "Unable to parse line \"$_line\" in $_file"
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_err=1
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fi
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;;
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esac
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done < $_file
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return $_err
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}
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##############################################################################
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# Setup Bluetooth stack. Create and connect nodes
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##############################################################################
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bluetooth_setup_stack()
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{
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dev=$1
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shift
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hook=$1
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shift
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# Setup HCI
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ngctl mkpeer ${dev}: hci ${hook} drv \
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> /dev/null 2>&1 || return 1
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ngctl name ${dev}:${hook} ${dev}hci \
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> /dev/null 2>&1 || return 1
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ngctl msg ${dev}hci: set_debug ${bluetooth_device_hci_debug_level} \
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> /dev/null 2>&1 || return 1
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# Setup L2CAP
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ngctl mkpeer ${dev}hci: l2cap acl hci \
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> /dev/null 2>&1 || return 1
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ngctl name ${dev}hci:acl ${dev}l2cap \
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> /dev/null 2>&1 || return 1
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ngctl msg ${dev}l2cap: set_debug ${bluetooth_device_l2cap_debug_level} \
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> /dev/null 2>&1 || return 1
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# Connect HCI node to the Bluetooth sockets layer
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ngctl connect ${dev}hci: btsock_hci_raw: raw ${dev}raw \
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> /dev/null 2>&1 || return 1
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# Connect L2CAP node to Bluetooth sockets layer
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ngctl connect ${dev}l2cap: btsock_l2c_raw: ctl ${dev}ctl \
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> /dev/null 2>&1 || return 1
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ngctl connect ${dev}l2cap: btsock_l2c: l2c ${dev}l2c \
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> /dev/null 2>&1 || return 1
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# Initilalize HCI node
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${hccontrol} -n ${dev}hci reset \
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> /dev/null 2>&1 || return 1
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${hccontrol} -n ${dev}hci read_bd_addr \
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> /dev/null 2>&1 || return 1
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${hccontrol} -n ${dev}hci read_local_supported_features \
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> /dev/null 2>&1 || return 1
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${hccontrol} -n ${dev}hci read_buffer_size \
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> /dev/null 2>&1 || return 1
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if checkyesno bluetooth_device_discoverable; then
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if checkyesno bluetooth_device_connectable; then
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${hccontrol} -n ${dev}hci write_scan_enable 3 \
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> /dev/null 2>&1 || return 1
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else
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${hccontrol} -n ${dev}hci write_scan_enable 1 \
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> /dev/null 2>&1 || return 1
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fi
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else
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if checkyesno bluetooth_device_connectable; then
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${hccontrol} -n ${dev}hci write_scan_enable 2 \
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> /dev/null 2>&1 || return 1
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else
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${hccontrol} -n ${dev}hci write_scan_enable 0 \
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> /dev/null 2>&1 || return 1
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fi
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fi
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${hccontrol} -n ${dev}hci write_class_of_device ${bluetooth_device_class} \
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> /dev/null 2>&1 || return 1
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if checkyesno bluetooth_device_authentication_enable; then
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${hccontrol} -n ${dev}hci write_authentication_enable 1 \
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> /dev/null 2>&1 || return 1
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else
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${hccontrol} -n ${dev}hci write_authentication_enable 0 \
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> /dev/null 2>&1 || return 1
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fi
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case "${bluetooth_device_encryption_mode}" in
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[Nn][Oo][Nn][Ee]|0)
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${hccontrol} -n ${dev}hci write_encryption_mode 0 \
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> /dev/null 2>&1 || return 1
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;;
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[Pp][2][Pp]|1)
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${hccontrol} -n ${dev}hci write_encryption_mode 1 \
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> /dev/null 2>&1 || return 1
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;;
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[Al][Ll][Ll]|2)
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${hccontrol} -n ${dev}hci write_encryption_mode 2 \
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> /dev/null 2>&1 || return 1
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;;
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*)
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warn "Unsupported encryption mode ${bluetooth_device_encryption_mode} for device ${dev}"
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return 1
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;;
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esac
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if checkyesno bluetooth_device_role_switch; then
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${hccontrol} -n ${dev}hci write_node_role_switch 1 \
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> /dev/null 2>&1 || return 1
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else
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${hccontrol} -n ${dev}hci write_node_role_switch 0 \
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> /dev/null 2>&1 || return 1
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fi
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${hccontrol} -n ${dev}hci change_local_name "${bluetooth_device_local_name}" \
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> /dev/null 2>&1 || return 1
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${hccontrol} -n ${dev}hci initialize \
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> /dev/null 2>&1 || return 1
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return 0
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}
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##############################################################################
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# Shutdown Bluetooth stack. Destroy all nodes
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##############################################################################
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bluetooth_shutdown_stack()
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{
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dev=$1
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ngctl shutdown ${dev}hci: > /dev/null 2>&1
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ngctl shutdown ${dev}l2cap: > /dev/null 2>&1
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return 0
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}
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##############################################################################
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# bluetooth_start()
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##############################################################################
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bluetooth_start()
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{
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local _file
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dev=$1
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# Try to figure out device type by looking at device name
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case "${dev}" in
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# uartX - serial/UART Bluetooth device
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uart*)
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load_kld ng_h4 || return 1
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hook="hook"
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# Obtain unit number from device.
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unit=`expr ${dev} : 'uart\([0-9]\{1,\}\)'`
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if [ -z "${unit}" ]; then
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err 1 "Unable to get uart unit number: ${dev}"
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fi
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${hcseriald} -f /dev/cuau${unit} -n ${dev}
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sleep 1 # wait a little bit
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if [ ! -f "/var/run/hcseriald.${dev}.pid" ]; then
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err 1 "Unable to start hcseriald on ${dev}"
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fi
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;;
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# 3Com Bluetooth Adapter 3CRWB60-A
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btccc*)
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hook="hook"
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# Obtain unit number from device.
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unit=`expr ${dev} : 'btccc\([0-9]\{1,\}\)'`
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if [ -z "${unit}" ]; then
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err 1 "Unable to get bt3c unit number: ${dev}"
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fi
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;;
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# USB Bluetooth adapters
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ubt*)
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hook="hook"
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# Obtain unit number from device.
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unit=`expr ${dev} : 'ubt\([0-9]\{1,\}\)'`
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if [ -z "${unit}" ]; then
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err 1 "Unable to get ubt unit number: ${dev}"
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fi
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;;
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# Unknown
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*)
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err 1 "Unsupported device: ${dev}"
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;;
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esac
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# Be backward compatible and setup reasonable defaults
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bluetooth_device_authentication_enable="0"
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bluetooth_device_class="ff:01:0c"
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bluetooth_device_connectable="1"
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bluetooth_device_discoverable="0"
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bluetooth_device_encryption_mode="0"
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bluetooth_device_hci_debug_level="3"
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bluetooth_device_l2cap_debug_level="3"
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bluetooth_device_local_name="`/usr/bin/uname -n` (${dev})"
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bluetooth_device_role_switch="1"
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# Load default device configuration parameters
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_file="/etc/defaults/bluetooth.device.conf"
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if ! bluetooth_read_conf $_file bluetooth_device_ ; then
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err 1 "Unable to read default Bluetooth configuration from $_file"
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fi
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# Load device specific overrides
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_file="/etc/bluetooth/$dev.conf"
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if ! bluetooth_read_conf $_file bluetooth_device_ ; then
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err 1 "Unable to read Bluetooth device configuration from $_file"
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fi
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# Setup stack
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if ! bluetooth_setup_stack ${dev} ${hook} ; then
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bluetooth_shutdown_stack $dev
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err 1 "Unable to setup Bluetooth stack for device ${dev}"
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fi
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return 0
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}
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##############################################################################
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# bluetooth_stop()
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##############################################################################
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bluetooth_stop()
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{
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dev=$1
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# Try to figure out device type by looking at device name
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case "${dev}" in
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# uartX - serial/UART Bluetooth device
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uart*)
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if [ -f "/var/run/hcseriald.${dev}.pid" ]; then
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kill `cat /var/run/hcseriald.${dev}.pid`
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sleep 1 # wait a little bit
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fi
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;;
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# 3Com Bluetooth Adapter 3CRWB60-A
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btccc*)
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;;
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# USB Bluetooth adapters
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ubt*)
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;;
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# Unknown
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*)
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err 1 "Unsupported device: ${dev}"
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;;
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esac
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bluetooth_shutdown_stack ${dev}
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return 0
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}
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##############################################################################
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# Start here
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##############################################################################
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load_rc_config $name
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hccontrol="${bluetooth_hccontrol:-/usr/sbin/hccontrol}"
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hcseriald="${bluetooth_hcseriald:-/usr/sbin/hcseriald}"
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run_rc_command $*
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