# Kconfig - Bluetooth LE stack configuration options

#
# Copyright (c) 2015-2016 Intel Corporation
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# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
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#     http://www.apache.org/licenses/LICENSE-2.0
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# 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
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#

comment "Host Stack Configuration"

config BLUETOOTH_HCI_RAW
	bool "RAW HCI access"
	help
	  This option allows to access Bluetooth controller
	  from the application with the RAW HCI protocol.

# Virtual/hidden option to make the conditions more intuitive
config BLUETOOTH_HCI_HOST
	bool
	default y
	depends on !BLUETOOTH_HCI_RAW
	select TINYCRYPT
	select TINYCRYPT_SHA256
	select TINYCRYPT_SHA256_HMAC
	select TINYCRYPT_SHA256_HMAC_PRNG

config BLUETOOTH_HCI_CMD_COUNT
	int "Number of HCI command buffers"
	default 2
	range 2 64
	help
	  Number of buffers available for HCI commands.

config BLUETOOTH_MAX_CMD_LEN
	int "Maximum supported HCI command length"
	default 64
	default 255 if BLUETOOTH_BREDR
	range 64 255
	range 255 255 if BLUETOOTH_BREDR
	help
	  Maximum length of each HCI command.

config BLUETOOTH_HCI_EVT_COUNT
	int "Number of HCI event buffers"
	default 4
	default 8 if BLUETOOTH_CONN
	range 2 64
	help
	  Number of buffers available for HCI events. This number should
	  ideally be at least as large as the available outgoing buffers
	  to make sure we've got enough buffers to handle bursts of
	  Number of Completed Packets HCI events.

config BLUETOOTH_MAX_EVT_LEN
	int "Maximum supported HCI event length"
	default 68
	default 255 if BLUETOOTH_BREDR
	range 68 255
	help
	  Maximum size of each HCI event buffer. E.g. one big event
	  for LE is the Command Complete for Read Local Supported
	  Commands. It is a 3 byte Command Complete header + 65 byte
	  return parameters = 68 bytes in total.

config BLUETOOTH_UART_TO_HOST_DEV_NAME
	string "Device Name of UART Device to an external Bluetooth Host"
	default "UART_0"
	depends on BLUETOOTH_HCI_RAW
	help
	  This option specifies the name of UART device to be used
	  to connect to an external Bluetooth Host when Zephyr is
	  acting as a Bluetooth Controller.

if BLUETOOTH_CONN || BLUETOOTH_HCI_RAW
config BLUETOOTH_ACL_IN_COUNT
	int "Number of incoming ACL data buffers"
	default 6
	default BLUETOOTH_CONTROLLER_RX_BUFFERS if BLUETOOTH_CONTROLLER
	range 2 64
	help
	  Number of buffers available for incoming ACL data.

config BLUETOOTH_L2CAP_IN_MTU
	int "Maximum supported L2CAP MTU for incoming data"
	default 23
	default 65 if BLUETOOTH_SMP
	default 200 if BLUETOOTH_BREDR
	range 23 1300
	range 65 1300 if BLUETOOTH_SMP
	help
	  Maximum size of each incoming L2CAP PDU.
endif # BLUETOOTH_CONN || BLUETOOTH_HCI_RAW

if BLUETOOTH_HCI_HOST
config BLUETOOTH_INTERNAL_STORAGE
	bool "Use an internal persistent storage handler"
	depends on FILE_SYSTEM
	help
	  When selected the application doesn't need to register its own
	  persistent storage handlers through the bt_storage API, rather
	  an internal default handler is used for this.

config BLUETOOTH_RX_STACK_SIZE
	int "Size of the receiving thread stack"
	default 1024
	range 1024 65536
	help
	  Size of the receiving thread stack. This is the context from
	  which all event callbacks to the application occur. The
	  default value is sufficient for basic operation, but if the
	  application needs to do advanced things in its callbacks that
	  require extra stack space, this value can be increased to
	  accommodate for that.

config BLUETOOTH_PERIPHERAL
	bool "Peripheral Role support"
	select BLUETOOTH_CONN
	help
	  Select this for LE Peripheral role support.

config BLUETOOTH_CENTRAL
	bool "Central Role support"
	select BLUETOOTH_CONN
	help
	  Select this for LE Central role support.

config BLUETOOTH_CONN
	bool

if BLUETOOTH_CONN
config BLUETOOTH_ATT_MTU
	int "Attribute Protocol (ATT) channel MTU"
	default 23
	default 50 if BLUETOOTH_SMP # BLUETOOTH_L2CAP_IN_MTU is big enough
				    # for two complete ACL packets
	range 23 BLUETOOTH_L2CAP_IN_MTU
	help
	  The MTU for the ATT channel. The minimum and default is 23,
	  whereas the maximum is limited by CONFIG_BLUETOOTH_L2CAP_IN_MTU.

config BLUETOOTH_ATT_PREPARE_COUNT
	int "Number of ATT prepare write buffers"
	default 0
	range 0 64
	help
	  Number of buffers available for ATT prepare write, setting
	  this to 0 disables GATT long/reliable writes.

config BLUETOOTH_ATT_REQ_COUNT
	int "Number of ATT request buffers"
	default BLUETOOTH_MAX_CONN
	range 1 64
	help
	  Number of outgoing buffers available for ATT requests, this controls
	  how many requests can be queued without blocking.

config BLUETOOTH_SMP
	bool "Security Manager Protocol support"
	select TINYCRYPT_AES
	select TINYCRYPT_AES_CMAC
	help
	  This option enables support for the Security Manager Protocol
	  (SMP), making it possible to pair devices over LE.

if BLUETOOTH_SMP
config BLUETOOTH_PRIVACY
	bool "Privacy Feature"
	help
	  Enable local Privacy Feature support. This makes it possible
	  to use Resolvable Private Addresses (RPAs).

config BLUETOOTH_RPA_TIMEOUT
	int "Resolvable Private Address timeout"
	depends on BLUETOOTH_PRIVACY
	default 900
	range 1 65535
	help
	  This option defines how often resolvable private address is rotated.
	  Value is provided in seconds and defaults to 900 seconds (15 minutes).

config BLUETOOTH_SIGNING
	bool "Data signing support"
	help
	  This option enables data signing which is used for transferring
	  authenticated data in an unencrypted connection.

config BLUETOOTH_SMP_SC_ONLY
	bool "Secure Connections Only Mode"
	help
	  This option enables support for Secure Connection Only Mode. In this
	  mode device shall only use Security Mode 1 Level 4 with exception
	  for services that only require Security Mode 1 Level 1 (no security).
	  Security Mode 1 Level 4 stands for authenticated LE Secure Connections
	  pairing with encryption. Enabling this option disables legacy pairing.

config BLUETOOTH_USE_DEBUG_KEYS
	bool "Enable Security Manager Debug Mode"
	depends on BLUETOOTH_TINYCRYPT_ECC
	help
	  This option places Security Manager in a Debug Mode. In this mode
	  predefined Diffie-Hellman private/public key pair is used as described
	  in Core Specification Vol. 3, Part H, 2.3.5.6.1. This option should
	  only be enabled for debugging and should never be used in production.
	  If this option is enabled anyone is able to decipher encrypted air
	  traffic.

endif # BLUETOOTH_SMP

config BLUETOOTH_L2CAP_DYNAMIC_CHANNEL
	bool "L2CAP Dynamic Channel support"
	depends on BLUETOOTH_SMP
	help
	  This option enables support for LE Connection oriented Channels,
	  allowing the creation of dynamic L2CAP Channels.

config BLUETOOTH_GATT_DYNAMIC_DB
	bool "GATT dynamic database support"
	help
	  This option enables GATT services to be added dynamically to database.

config BLUETOOTH_GATT_CLIENT
	bool "GATT client support"
	help
	  This option enables support for the GATT Client role.

config BLUETOOTH_MAX_PAIRED
	int "Maximum number of paired devices"
	default 1
	range 1 128
	help
	  Maximum number of paired Bluetooth devices. The minimum (and
	  default) number is 1.

endif # BLUETOOTH_CONN

config BLUETOOTH_TINYCRYPT_ECC
	bool "Use TinyCrypt library for ECDH"
	select TINYCRYPT_ECC_DH
	help
	  If this option is set TinyCrypt library is used for emulating the
	  ECDH HCI commands and events needed by e.g. LE Secure Connections.
	  If not set controller crypto is used for ECDH and if
	  controller doesn't support required HCI commands LE Secure
	  Connections support will be disabled.

endif # BLUETOOTH_HCI_HOST

config BLUETOOTH_MAX_CONN
	int "Maximum number of simultaneous connections"
	depends on BLUETOOTH_CONN || BLUETOOTH_CONTROLLER
	default 1
	range 1 64
	help
	  Maximum number of simultaneous Bluetooth connections
	  supported. The minimum (and default) number is 1.

config BLUETOOTH_DEBUG
	bool

choice
	prompt "Bluetooth debug type"
	depends on BLUETOOTH
	default BLUETOOTH_DEBUG_NONE

config BLUETOOTH_DEBUG_NONE
	bool "No debug log"
	help
	  Select this to disable all Bluetooth debug logs.

config BLUETOOTH_DEBUG_LOG
	bool "Normal printf-style to console"
	select BLUETOOTH_DEBUG
	select STDOUT_CONSOLE
	select SYS_LOG
	help
	  This option enables Bluetooth debug going to standard
	  serial console.

config BLUETOOTH_DEBUG_MONITOR
	bool "Monitor protocol over UART"
	select BLUETOOTH_DEBUG
	select CONSOLE_HAS_DRIVER
	help
	  Use a custom logging protocol over the console UART
	  instead of plain-text output. Requires a special application
	  on the host side that can decode this protocol. Currently
	  the 'btmon' tool from BlueZ is capable of doing this.

	  If the target board has two or more external UARTs it is
	  possible to keep using UART_CONSOLE together with this option,
	  however if there is only a single external UART then
	  UART_CONSOLE needs to be disabled (in which case printk/printf
	  will get encoded into the monitor protocol).

endchoice

config BLUETOOTH_DEBUG_COLOR
	bool "Use colored logs"
	depends on BLUETOOTH_DEBUG_LOG
	select SYS_LOG_SHOW_COLOR
	default y
	help
	  Use color in the logs. This requires an ANSI capable terminal.

config BLUETOOTH_MONITOR_ON_DEV_NAME
	string "Device Name of Bluetooth monitor logging UART"
	depends on BLUETOOTH_DEBUG_MONITOR
	default "UART_0"
	help
	 This option specifies the name of UART device to be used
	 for the Bluetooth monitor logging.

if BLUETOOTH_DEBUG
config BLUETOOTH_DEBUG_HCI_CORE
	bool "Bluetooth HCI core debug"
	depends on BLUETOOTH_HCI_HOST
	help
	  This option enables debug support for Bluetooth HCI
	  core.

config BLUETOOTH_DEBUG_CONN
	bool "Bluetooth connection debug"
	depends on BLUETOOTH_CONN
	help
	  This option enables debug support for Bluetooth
	  connection handling.

config BLUETOOTH_DEBUG_KEYS
	bool "Bluetooth security keys debug"
	depends on BLUETOOTH_HCI_HOST
	depends on BLUETOOTH_SMP
	help
	  This option enables debug support for the handling of
	  Bluetooth security keys.

config BLUETOOTH_DEBUG_L2CAP
	bool "Bluetooth L2CAP debug"
	depends on BLUETOOTH_CONN
	help
	  This option enables debug support for the Bluetooth
	  L2ACP layer.

config BLUETOOTH_DEBUG_SMP
	bool "Bluetooth Security Manager Protocol (SMP) debug"
	depends on BLUETOOTH_HCI_HOST
	depends on BLUETOOTH_SMP
	help
	  This option enables debug support for the Bluetooth
	  Security Manager Protocol (SMP).

config BLUETOOTH_SMP_SELFTEST
	bool "Bluetooth SMP self tests executed on init"
	depends on BLUETOOTH_DEBUG_SMP
	help
	  This option enables SMP self-tests executed on startup
	  to verify security and crypto functions.

config BLUETOOTH_SMP_FORCE_BREDR
	bool "Force Bluetooth SMP over BR/EDR"
	depends on BLUETOOTH_DEBUG_SMP
	help
	  This option enables SMP over BR/EDR even if controller is not
	  supporting BR/EDR Secure Connections. This optino is solely for
	  testing and should never be enabled on production devices.

config BLUETOOTH_DEBUG_ATT
	bool "Bluetooth Attribute Protocol (ATT) debug"
	depends on BLUETOOTH_CONN
	help
	  This option enables debug support for the Bluetooth
	  Attribute Protocol (ATT).

config BLUETOOTH_DEBUG_GATT
	bool "Bluetooth Generic Attribute Profile (GATT) debug"
	depends on BLUETOOTH_CONN
	help
	  This option enables debug support for the Bluetooth
	  Generic Attribute Profile (GATT).

config BLUETOOTH_DEBUG_RFCOMM
	bool "Bluetooth RFCOMM debug"
	depends on BLUETOOTH_RFCOMM
	help
	  This option enables debug support for the Bluetooth
	  RFCOMM layer.

config BLUETOOTH_DEBUG_HFP_HF
	bool "Bluetooth Hands Free Profile (HFP) debug"
	depends on BLUETOOTH_HFP_HF
	help
	  This option enables debug support for the Bluetooth
	  Hands Free Profile (HFP).

config BLUETOOTH_DEBUG_AVDTP
	bool "Bluetooth AVDTP debug"
	depends on BLUETOOTH_AVDTP
	help
	  This option enables debug support for the Bluetooth AVDTP.

config BLUETOOTH_DEBUG_A2DP
	bool "Bluetooth A2DP debug"
	depends on BLUETOOTH_A2DP
	help
	  This option enables debug support for the Bluetooth
	  A2DP profile.

config BLUETOOTH_DEBUG_SDP
	bool "Bluetooth Service Discovery Protocol (SDP) debug"
	depends on BLUETOOTH_BREDR
	help
		This option enables debug support for the Bluetooth
		Service Discovery Protocol (SDP).

endif # BLUETOOTH_DEBUG

config BLUETOOTH_BREDR
	bool "Bluetooth BR/EDR support [EXPERIMENTAL]"
	depends on BLUETOOTH_HCI_HOST
	select BLUETOOTH_PERIPHERAL
	select BLUETOOTH_CENTRAL
	select BLUETOOTH_SMP
	select BLUETOOTH_L2CAP_DYNAMIC_CHANNEL
	help
	  This option enables Bluetooth BR/EDR support"

if BLUETOOTH_BREDR
config BLUETOOTH_RFCOMM
	bool "Bluetooth RFCOMM protocol support [EXPERIMENTAL]"
	help
	  This option enables Bluetooth RFCOMM support

config BLUETOOTH_RFCOMM_L2CAP_MTU
	int "L2CAP MTU for RFCOMM frames"
	default BLUETOOTH_L2CAP_IN_MTU
	depends on BLUETOOTH_RFCOMM
	range BLUETOOTH_L2CAP_IN_MTU 32767
	help
	  Maximum size of L2CAP PDU for RFCOMM frames.

config BLUETOOTH_HFP_HF
	bool "Bluetooth Handsfree profile HF Role support [EXPERIMENTAL]"
	select BLUETOOTH_RFCOMM
	help
	  This option enables Bluetooth HF support

config BLUETOOTH_AVDTP
	bool "Bluetooth AVDTP protocol support [EXPERIMENTAL]"
	help
	  This option enables Bluetooth AVDTP support

config BLUETOOTH_A2DP
	bool "Bluetooth A2DP Profile [EXPERIMENTAL]"
	select BLUETOOTH_AVDTP
	help
	  This option enables the A2DP profile

config BLUETOOTH_PAGE_TIMEOUT
	hex "Bluetooth Page Timeout"
	default 0x2000
	range 0x0001 0xffff
	help
	  This option sets the page timeout value. Value is selected as
	  (N * 0.625) ms.

config BLUETOOTH_BREDR_NAME
	string "Bluetooth BR/EDR device name"
	default "Zephyr"
	help
	  Bluetooth BR/EDR name. Name can be up to 248 bytes long (excluding
	  NULL termination). Can be empty string.
endif # BLUETOOTH_BREDR