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# Bluetooth LE stack configuration options
# Copyright (c) 2016-2020 Nordic Semiconductor ASA
# Copyright (c) 2015-2016 Intel Corporation
# SPDX-License-Identifier: Apache-2.0
config BT_LONG_WQ
bool "Dedicated workqueue for long-running tasks."
default y if BT_GATT_CACHING
help
Adds an API for a workqueue dedicated to long-running tasks.
if BT_LONG_WQ
config BT_LONG_WQ_STACK_SIZE
# Hidden: Long workqueue stack size. Should be derived from system
# requirements.
int
default BT_HCI_ECC_STACK_SIZE if BT_TINYCRYPT_ECC
default 1024
config BT_LONG_WQ_PRIO
int "Long workqueue priority. Should be pre-emptible."
default 10
range 0 NUM_PREEMPT_PRIORITIES
endif # BT_LONG_WQ
config BT_HCI_HOST
# Hidden option to make the conditions more intuitive
bool
default y
depends on !BT_HCI_RAW
select POLL
config BT_HCI_TX_STACK_SIZE
# NOTE: This value is derived from other symbols and should only be
# changed if required by architecture
int
prompt "HCI Tx thread stack size" if BT_HCI_TX_STACK_SIZE_WITH_PROMPT
default 512 if BT_H4
default 512 if BT_H5
default 416 if BT_SPI
default 940 if BT_CTLR && BT_LL_SW_SPLIT && NO_OPTIMIZATIONS
default 1024 if BT_CTLR && BT_LL_SW_SPLIT && BT_CENTRAL
default 768 if BT_CTLR && BT_LL_SW_SPLIT
default 512 if BT_USERCHAN
default 640 if BT_STM32_IPM
default 1024 if BT_B91
# Even if no driver is selected the following default is still
# needed e.g. for unit tests. This default will also server as
# the worst-case stack size if an out-of-tree controller is used.
default 1024
help
Stack size needed for executing bt_send with specified driver.
NOTE: This is an advanced setting and should not be changed unless
absolutely necessary. To change this you must first select
BT_HCI_TX_STACK_SIZE_WITH_PROMPT.
config BT_HCI_TX_STACK_SIZE_WITH_PROMPT
bool "Override HCI Tx thread stack size"
config BT_HCI_ECC_STACK_SIZE
# NOTE: This value is derived from other symbols and should only be
# changed if required by architecture
int "HCI ECC thread stack size"
depends on BT_TINYCRYPT_ECC
default 1140
help
NOTE: This is an advanced setting and should not be changed unless
absolutely necessary
config BT_HCI_TX_PRIO
# Hidden option for Co-Operative Tx thread priority
int
default 7
config BT_HCI_RESERVE
int
default 0 if BT_H4
default 1 if BT_H5
default 1 if BT_RPMSG
default 1 if BT_SPI
default 1 if BT_STM32_IPM
default 1 if BT_USERCHAN
default 1 if BT_ESP32
default 0 if BT_B91
# Even if no driver is selected the following default is still
# needed e.g. for unit tests.
default 0
help
Headroom that the driver needs for sending and receiving buffers. Add a
new 'default' entry for each new driver.
choice BT_RECV_CONTEXT
prompt "BT RX Thread Selection"
default BT_RECV_BLOCKING if BT_LL_SW_SPLIT || BT_H4
default BT_RECV_WORKQ_BT
help
Selects in which context incoming low priority HCI packets are processed.
The host defines some events as high priority to avoid race conditions and deadlocks.
High priority events are always processed in the context of the caller of bt_recv()
or bt_recv_prio(). The choice will influence RAM usage and how fast incoming HCI
packets are processed.
config BT_RECV_BLOCKING
bool "Process HCI packets in the context of bt_recv() and bt_recv_prio()"
help
When this option is selected, the host will not have its own RX thread.
With this option it is the responsibility of the HCI driver to call
bt_recv_prio from a higher priority context than bt_recv() in order to avoid deadlocks.
config BT_RECV_WORKQ_SYS
bool "Process low priority HCI packets in the system work queue"
help
When this option is selected, the host will process incoming low priority HCI packets
in the system work queue. The HCI driver shall not call bt_recv_prio().
High priority HCI packets will processed in the context of the caller of bt_recv().
The application needs to ensure the system workqueue stack size (SYSTEM_WORKQUEUE_STACK_SIZE)
is large enough, refer to BT_RX_STACK_SIZE for the recommended minimum.
Note: When this option is used, other users of the system work queue will influence the
latency of incoming Bluetooth events.
config BT_RECV_WORKQ_BT
bool "Process low priority HCI packets in the bluetooth-specific work queue"
help
When this option is selected, the host will process incoming low priority HCI packets
in the bluetooth-specific work queue. The HCI driver shall not call bt_recv_prio().
High priority HCI packets will processed in the context of the caller of bt_recv().
The application needs to ensure the bluetooth-specific work queue size is large enough,
refer to BT_RX_STACK_SIZE for the recommended minimum.
endchoice
config BT_RX_STACK_SIZE
int "Size of the receiving thread stack"
default 768 if BT_HCI_RAW
default 3092 if BT_MESH_GATT_CLIENT
default 2200 if BT_MESH
default 2048 if BT_AUDIO
default 2200 if BT_SETTINGS
default 1024
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 BT_RX_PRIO
# Hidden option for Co-Operative Rx thread priority
int
default 8
config BT_DRIVER_RX_HIGH_PRIO
# Hidden option for Co-Operative HCI driver RX thread priority
int
default 6
menu "Bluetooth Host"
if BT_HCI_HOST
rsource "../mesh/Kconfig"
rsource "../audio/Kconfig"
config BT_HOST_CRYPTO
# Hidden option that compiles in AES encryption support using TinyCrypt
# library if this is not provided by the controller implementation.
bool
default y if !BT_CTLR_CRYPTO
select TINYCRYPT
select TINYCRYPT_AES
config BT_HOST_CRYPTO_PRNG
bool "Use Tinycrypt library for random number generation"
default y
select TINYCRYPT_SHA256
select TINYCRYPT_SHA256_HMAC
select TINYCRYPT_SHA256_HMAC_PRNG
depends on BT_HOST_CRYPTO
help
When selected, will use tinycrypt library for random number generation.
This will consume additional ram, but may speed up the generation of random
numbers.
Otherwise, random numbers will be generated through multiple HCI calls,
which will not consume additional resources, but may take a long time,
depending on the length of the random data.
This method is generally recommended within 16 bytes.
config BT_SETTINGS
bool "Store Bluetooth state and configuration persistently"
depends on SETTINGS
select MPU_ALLOW_FLASH_WRITE if ARM_MPU
help
When selected, the Bluetooth stack will take care of storing
(and restoring) the Bluetooth state (e.g. pairing keys) and
configuration persistently in flash.
When this option has been enabled, it's important that the
application makes a call to settings_load() after having done
all necessary initialization (e.g. calling bt_enable). The
reason settings_load() is handled externally to the stack, is
that there may be other subsystems using the settings API, in
which case it's more efficient to load all settings in one go,
instead of each subsystem doing it independently.
if BT_SETTINGS
config BT_SETTINGS_CCC_LAZY_LOADING
bool "Load CCC values from settings when peer connects"
depends on BT_CONN
default y
help
Load Client Configuration Characteristic setting right after a bonded
device connects.
Disabling this option will increase memory usage as CCC values for all
bonded devices will be loaded when calling settings_load.
config BT_SETTINGS_CCC_STORE_ON_WRITE
bool "Store CCC value immediately after it has been written"
depends on BT_CONN
default y
help
Store Client Configuration Characteristic value right after it has
been updated. If the option is disabled, the CCC is only stored on
disconnection.
config BT_SETTINGS_USE_PRINTK
bool "Use snprintk to encode Bluetooth settings key strings"
depends on SETTINGS && PRINTK
default y
help
When selected, Bluetooth settings will use snprintk to encode
key strings.
When not selected, Bluetooth settings will use a faster builtin
function to encode the key string. The drawback is that if
printk is enabled then the program memory footprint will be larger.
endif # BT_SETTINGS
config BT_FILTER_ACCEPT_LIST
bool "Filter accept list support"
help
This option enables the filter accept list API. This takes advantage of the
filtering feature of a BLE controller.
The filter accept list is a global list and the same list is used
by both scanner and advertiser. The filter accept list cannot be modified while
it is in use.
An Advertiser can filter which peers can connect or request scan
response data.
A scanner can filter advertisers for which it will generate
advertising reports.
Connections can be established automatically for accepted peers.
config BT_LIM_ADV_TIMEOUT
int "Timeout for limited advertising in 1s units"
default 30
range 1 180
depends on BT_BROADCASTER
help
After this timeout is reached, advertisement with BT_LE_AD_LIMITED flag
set shall be terminated. As per BT Core Spec 5.2, Vol 3, Part C,
Appendix A (NORMATIVE): TIMERS AND CONSTANTS it's required to be no more
than 180s.
if BT_CONN
config BT_CONN_TX_MAX
int "Maximum number of pending TX buffers with a callback"
default BT_L2CAP_TX_BUF_COUNT
range BT_L2CAP_TX_BUF_COUNT 255
help
Maximum number of pending TX buffers that have an associated
callback. Normally this can be left to the default value, which
is equal to the number of TX buffers in the stack-internal pool.
config BT_USER_PHY_UPDATE
bool "User control of PHY Update Procedure"
depends on BT_PHY_UPDATE
help
Enable application access to initiate the PHY Update Procedure.
The application can also register a callback to be notified about PHY
changes on the connection. The current PHY info is available in the
connection info.
config BT_AUTO_PHY_UPDATE
bool "Auto-initiate PHY Update Procedure"
depends on BT_PHY_UPDATE
default y if !BT_USER_PHY_UPDATE
help
Initiate PHY Update Procedure on connection establishment.
Disable this if you want the PHY Update Procedure feature supported
but want to rely on the remote device to initiate the procedure at its
discretion or want to initiate manually.
config BT_USER_DATA_LEN_UPDATE
bool "User control of Data Length Update Procedure"
depends on BT_DATA_LEN_UPDATE
help
Enable application access to initiate the Data Length Update
Procedure. The application can also a register callback to be notified
about Data Length changes on the connection. The current Data Length
info is available in the connection info.
config BT_AUTO_DATA_LEN_UPDATE
bool "Auto-initiate Data Length Update procedure"
depends on BT_DATA_LEN_UPDATE
default y if !BT_USER_DATA_LEN_UPDATE
help
Initiate Data Length Update Procedure on connection establishment.
Disable this if you want the Data Length Update Procedure feature
supported but want to rely on the remote device to initiate the
procedure at its discretion or want to initiate manually.
config BT_REMOTE_INFO
bool "Application access to remote information"
help
Enable application access to the remote information available in the
stack. The remote information is retrieved once a connection has been
established and the application will be notified when this information
is available through the remote_info_available connection callback.
config BT_SMP
bool "Security Manager Protocol support"
select TINYCRYPT
select TINYCRYPT_AES
select TINYCRYPT_AES_CMAC
select BT_RPA
select BT_ECC
help
This option enables support for the Security Manager Protocol
(SMP), making it possible to pair devices over LE.
if BT_SMP
config BT_PRIVACY
bool "Privacy Feature"
help
Enable local Privacy Feature support. This makes it possible
to use Resolvable Private Addresses (RPAs).
config BT_RPA_TIMEOUT
int "Resolvable Private Address timeout"
depends on BT_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 BT_SIGNING
bool "Data signing support"
help
This option enables data signing which is used for transferring
authenticated data in an unencrypted connection.
config BT_SMP_APP_PAIRING_ACCEPT
bool "Accept or reject pairing initiative"
help
When receiving pairing request or pairing response query the
application whether to accept to proceed with pairing or not. This is
for pairing over SMP and does not affect SSP, which will continue
pairing without querying the application.
The application can return an error code, which is translated into
a SMP return value if the pairing is not allowed.
config BT_SMP_SC_PAIR_ONLY
bool "Disable legacy pairing"
help
This option disables LE legacy pairing and forces LE secure connection
pairing. All Security Mode 1 levels can be used with legacy pairing
disabled, but pairing with devices that do not support secure
connections pairing will not be supported.
To force a higher security level use "Secure Connections Only Mode"
config BT_SMP_SC_ONLY
bool "Secure Connections Only Mode"
select BT_SMP_SC_PAIR_ONLY
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 BT_SMP_OOB_LEGACY_PAIR_ONLY
bool "Force Out Of Band Legacy pairing"
depends on !(BT_SMP_SC_PAIR_ONLY || BT_SMP_SC_ONLY)
help
This option disables Legacy and LE SC pairing and forces legacy OOB.
config BT_SMP_DISABLE_LEGACY_JW_PASSKEY
bool "Forbid usage of insecure legacy pairing methods"
depends on !(BT_SMP_SC_PAIR_ONLY || BT_SMP_SC_ONLY || \
BT_SMP_OOB_LEGACY_PAIR_ONLY)
help
This option disables Just Works and Passkey legacy pairing methods to
increase security.
config BT_SMP_ALLOW_UNAUTH_OVERWRITE
bool "Allow unauthenticated pairing for paired device"
help
This option allows all unauthenticated pairing attempts made by the
peer where an unauthenticated bond already exists.
This would enable cases where an attacker could copy the peer device
address to connect and start an unauthenticated pairing procedure
to replace the existing bond. When this option is disabled in order
to create a new bond the old bond has to be explicitly deleted with
bt_unpair.
config BT_SMP_USB_HCI_CTLR_WORKAROUND
bool "Workaround for USB HCI controller out-of-order events"
depends on BT_TESTING
help
This option enables support for USB HCI controllers that sometimes
send out-of-order HCI events and ACL Data due to using different USB
endpoints.
Enabling this option will make the central role not require the
encryption-change event to be received before accepting key-distribution
data.
It opens up for a potential vulnerability as the central cannot detect
if the keys are distributed over an encrypted link.
config BT_FIXED_PASSKEY
bool "Use a fixed passkey for pairing"
help
With this option enabled, the application will be able to call the
bt_passkey_set() API to set a fixed passkey. If set, the
pairing_confirm() callback will be called for all incoming pairings.
config BT_USE_DEBUG_KEYS
bool "Security Manager Debug Mode"
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.
WARNING: This option enables anyone to decrypt on-air traffic.
Use of this feature in production is strongly discouraged.
config BT_BONDABLE
bool "Bondable Mode"
default y
help
This option enables support for Bondable Mode. In this mode,
Bonding flag in AuthReq of SMP Pairing Request/Response will be set
indicating the support for this mode.
config BT_BONDING_REQUIRED
bool "Always require bonding"
depends on BT_BONDABLE
help
When this option is enabled remote devices are required to always
set the bondable flag in their pairing request. Any other kind of
requests will be rejected.
config BT_STORE_DEBUG_KEYS
bool "Store Debug Mode bonds"
help
This option enables support for storing bonds where either of devices
is using the predefined Diffie-Hellman private/public key pair as
described in the Core Specification Vol 3, Part H, 2.3.5.6.1.
WARNING: This option potentially enables anyone to decrypt on-air
traffic.
Use of this feature in production is strongly discouraged.
config BT_SMP_ENFORCE_MITM
bool "Enforce MITM protection"
default y
help
With this option enabled, the Security Manager will set MITM option in
the Authentication Requirements Flags whenever local IO Capabilities
allow the generated key to be authenticated.
config BT_OOB_DATA_FIXED
bool "Use a fixed random number for LESC OOB pairing"
depends on BT_TESTING
help
With this option enabled, the application will be able to perform LESC
pairing with OOB data that consists of fixed random number and confirm
value.
WARNING: This option stores a hardcoded Out-of-Band value in the image.
Use of this feature in production is strongly discouraged.
config BT_KEYS_OVERWRITE_OLDEST
bool "Overwrite the oldest key if key storage is full"
help
If a pairing attempt occurs and the key storage is full then the
oldest key from the set of not currently in use keys will be selected
and overwritten by the pairing device.
config BT_KEYS_SAVE_AGING_COUNTER_ON_PAIRING
bool "Store aging counter every time a successful paring occurs"
depends on BT_SETTINGS && BT_KEYS_OVERWRITE_OLDEST
help
With this option enabled, aging counter will be stored in settings every
time a successful pairing occurs. This increases flash wear out but offers
a more correct finding of the oldest unused pairing info.
config BT_SMP_MIN_ENC_KEY_SIZE
int
prompt "Minimum encryption key size accepted in octets" if !BT_SMP_SC_ONLY
range 7 16
default 7
default 16 if BT_SMP_SC_ONLY
help
This option sets the minimum encryption key size accepted during pairing.
endif # BT_SMP
rsource "Kconfig.l2cap"
rsource "Kconfig.gatt"
rsource "../services/Kconfig"
config BT_MAX_PAIRED
int "Maximum number of paired devices"
default 0 if !BT_SMP
default 1
range 0 128
help
Maximum number of paired Bluetooth devices. The minimum (and
default) number is 1.
config BT_CREATE_CONN_TIMEOUT
int "Timeout for pending LE Create Connection command in seconds"
default 3
range 1 BT_RPA_TIMEOUT if BT_PRIVACY && (BT_RPA_TIMEOUT < 655)
range 1 655
config BT_CONN_PARAM_UPDATE_TIMEOUT
int "Peripheral connection parameter update timeout in milliseconds"
default 5000
range 0 65535
help
The value is a timeout used by peripheral device to wait until it
starts the first connection parameters update procedure after a
connection has been established.
The connection parameters requested will be the parameters set by the
application, or the peripheral preferred connection parameters if
configured.
The default value is set to 5 seconds, to comply with the Bluetooth
Core specification: Core 4.2 Vol 3, Part C, 9.3.12.2:
"The Peripheral device should not perform a Connection Parameter
Update procedure within 5 seconds after establishing a connection."
endif # BT_CONN
if BT_OBSERVER
config BT_BACKGROUND_SCAN_INTERVAL
int "Scan interval used for background scanning in 0.625 ms units"
default 2048
range 4 16384
config BT_BACKGROUND_SCAN_WINDOW
int "Scan window used for background scanning in 0.625 ms units"
default 18
range 4 16384
config BT_EXT_SCAN_BUF_SIZE
int "Maximum advertisement report size"
depends on BT_EXT_ADV
range 1 1650
default 229
help
Maximum size of an advertisement report in octets. If the advertisement
provided by the controller is larger than this buffer size,
the remaining data will be discarded.
endif # BT_OBSERVER
config BT_SCAN_WITH_IDENTITY
bool "Perform active scanning using local identity address"
depends on !BT_PRIVACY && (BT_CENTRAL || BT_OBSERVER)
help
Enable this if you want to perform active scanning using the local
identity address as the scanner address. By default the stack will
always use a non-resolvable private address (NRPA) in order to avoid
disclosing local identity information. By not scanning with the
identity address the scanner will receive directed advertise reports
for for the local identity. If this use case is required, then enable
this option.
config BT_DEVICE_NAME_DYNAMIC
bool "Allow to set Bluetooth device name on runtime"
help
Enabling this option allows for runtime configuration of Bluetooth
device name.
config BT_DEVICE_NAME_MAX
int "Maximum size in bytes for device name"
depends on BT_DEVICE_NAME_DYNAMIC
default 28
range 2 248
help
Bluetooth device name storage size. Storage can be up to 248 bytes
long (excluding NULL termination).
config BT_DEVICE_NAME
string "Bluetooth device name"
default "Zephyr"
help
Bluetooth device name. Name can be up to 248 bytes long (excluding
NULL termination). Can be empty string.
config BT_DEVICE_APPEARANCE_DYNAMIC
bool "Runtime Bluetooth Appearance changing"
help
Enables use of bt_set_appearance.
If CONFIG_BT_SETTINGS is set, the appearance is persistently stored.
config BT_DEVICE_APPEARANCE_GATT_WRITABLE
bool "Allow authenticated peers to set GAP Appearance"
depends on BT_DEVICE_APPEARANCE_DYNAMIC
config BT_DEVICE_APPEARANCE
int "Bluetooth device appearance"
range 0 65535
default 0
help
Bluetooth device appearance. For the list of possible values please
consult the following link:
https://www.bluetooth.com/specifications/assigned-numbers
config BT_ID_MAX
int "Maximum number of local identities"
range 1 250
default 1
help
Maximum number of supported local identity addresses. For most
products this is safe to leave as the default value (1).
config BT_DF
bool "Direction Finding support [EXPERIMENTAL]"
depends on !BT_CTLR || BT_CTLR_DF_SUPPORT
select EXPERIMENTAL
help
Enable support for Bluetooth 5.1 Direction Finding.
It will allow to: get information about antennae, configure
Constant Tone Extension, transmit CTE and sample incoming CTE.
if BT_DF
config BT_DF_CONNECTIONLESS_CTE_RX
bool "Support for receive of CTE in connectionless mode"
depends on !BT_CTLR || BT_CTLR_DF_CTE_RX_SUPPORT
help
Enable support for reception and sampling of Constant Tone Extension
in connectionless mode.
config BT_DF_CONNECTIONLESS_CTE_TX
bool "Support for transmission of CTE in connectionless mode"
depends on !BT_CTLR || BT_CTLR_DF_CTE_TX_SUPPORT
help
Enable support for transmission of Constant Tone Extension in
connectionless mode.
config BT_DF_CONNECTION_CTE_RX
bool "Support for receive of CTE in connection mode"
depends on !BT_CTLR || BT_CTLR_DF_CTE_RX_SUPPORT
help
Enable support for reception and sampling of Constant Tone Extension
in connection mode.
config BT_DF_CONNECTION_CTE_TX
bool "Support for transmission of CTE in connection mode"
depends on !BT_CTLR || BT_CTLR_DF_CTE_TX_SUPPORT
help
Enable support for transmission of Constant Tone Extension in
connection mode.
config BT_DF_CONNECTION_CTE_REQ
bool "Support for CTE request procedure in connection mode"
depends on BT_DF_CONNECTION_CTE_RX
help
Enable support for request of Constant Tone Extension in connection
mode.
config BT_DF_CONNECTION_CTE_RSP
bool "Support for CTE request procedure in connection mode"
depends on BT_DF_CONNECTION_CTE_TX
help
Enable support for request of Constant Tone Extension in connection
mode.
config BT_DF_CTE_RX_AOA
bool "Antenna switching during CTE reception (AoA) feature"
depends on BT_DF_CONNECTIONLESS_CTE_RX || BT_DF_CONNECTION_CTE_RX
default y
help
Enable support for antenna switching during CTE reception.
Also known as Angle of Arrival mode.
config BT_DF_CTE_TX_AOD
bool "Antenna switching during CTE transmission (AoD) feature"
depends on BT_DF_CONNECTIONLESS_CTE_TX || BT_DF_CONNECTION_CTE_TX
default y
help
Enable support for antenna switching during CTE transmission.
Also known as Angle of Departure mode.
config BT_DEBUG_DF
bool "Bluetooth Direction Finding debug"
help
This option enables debug support for Bluetooth Direction Finding
endif # BT_DF
endif # BT_HCI_HOST
config BT_ECC
bool "ECDH key generation support"
default y if BT_MESH_PROV || (BT_SMP && !BT_SMP_OOB_LEGACY_PAIR_ONLY)
help
This option adds support for ECDH HCI commands.
config BT_TINYCRYPT_ECC
bool "Emulate ECDH in the Host using TinyCrypt library"
select TINYCRYPT
select TINYCRYPT_ECC_DH
select BT_LONG_WQ
depends on BT_ECC && (BT_HCI_RAW || BT_HCI_HOST)
default y if BT_CTLR && !BT_CTLR_ECDH
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.
In builds including the BLE Host, if not set the controller crypto is
used for ECDH and if the controller doesn't support the required HCI
commands the LE Secure Connections support will be disabled.
In builds including the HCI Raw interface and the BLE Controller, this
option injects support for the 2 HCI commands required for LE Secure
Connections so that Hosts can make use of those. The option defaults
to enabled for a combined build with Zephyr's own controller, since it
does not have any special ECC support itself (at least not currently).
config BT_HOST_CCM
bool "Host side AES-CCM module"
help
Enables the software based AES-CCM engine in the host. Will use the
controller's AES encryption functions if available, or BT_HOST_CRYPTO
otherwise.
config BT_PER_ADV_SYNC_BUF_SIZE
int "Maximum periodic advertising report size"
depends on BT_PER_ADV_SYNC
range 0 1650
default 0
help
Maximum size of a fragmented periodic advertising report. If the periodic
advertising report provided by the controller is fragmented and larger
than this buffer size, then the data will be discarded.
Unfragmented reports are forwarded as they are received.
if BT_DEBUG
config BT_DEBUG_SETTINGS
bool "Bluetooth storage debug"
depends on BT_SETTINGS
help
This option enables debug support for Bluetooth storage.
config BT_DEBUG_HCI_CORE
bool "Bluetooth HCI core debug"
help
This option enables debug support for Bluetooth HCI
core.
config BT_DEBUG_CONN
bool "Bluetooth connection debug"
depends on BT_CONN || BT_ISO
help
This option enables debug support for Bluetooth
connection handling.
config BT_DEBUG_ISO
bool "ISO channel debug"
help
Use this option to enable ISO channels debug logs for the
Bluetooth Audio functionality.
config BT_DEBUG_KEYS
bool "Bluetooth security keys debug"
depends on BT_HCI_HOST
depends on BT_SMP
help
This option enables debug support for the handling of
Bluetooth security keys.
WARNING: This option prints out private security keys such as
the Long Term Key.
Use of this feature in production is strongly discouraged.
config BT_DEBUG_SMP
bool "Bluetooth Security Manager Protocol (SMP) debug"
depends on BT_HCI_HOST
depends on BT_SMP
help
This option enables debug support for the Bluetooth
Security Manager Protocol (SMP).
WARNING: This option prints out private security keys such as
the Long Term Key.
Use of this feature in production is strongly discouraged.
config BT_SMP_SELFTEST
bool "Bluetooth SMP self tests executed on init"
depends on BT_DEBUG_SMP
help
This option enables SMP self-tests executed on startup
to verify security and crypto functions.
config BT_SMP_FORCE_BREDR
bool "Force Bluetooth SMP over BR/EDR"
depends on BT_DEBUG_SMP
help
This option enables SMP over BR/EDR even if controller is not
supporting BR/EDR Secure Connections. This option is solely for
testing and should never be enabled on production devices.
config BT_DEBUG_RFCOMM
bool "Bluetooth RFCOMM debug"
depends on BT_RFCOMM
help
This option enables debug support for the Bluetooth
RFCOMM layer.
config BT_DEBUG_HFP_HF
bool "Bluetooth Hands Free Profile (HFP) debug"
depends on BT_HFP_HF
help
This option enables debug support for the Bluetooth
Hands Free Profile (HFP).
config BT_DEBUG_AVDTP
bool "Bluetooth AVDTP debug"
depends on BT_AVDTP
help
This option enables debug support for the Bluetooth AVDTP.
config BT_DEBUG_A2DP
bool "Bluetooth A2DP debug"
depends on BT_A2DP
help
This option enables debug support for the Bluetooth
A2DP profile.
config BT_DEBUG_SDP
bool "Bluetooth Service Discovery Protocol (SDP) debug"
depends on BT_BREDR
help
This option enables debug support for the Bluetooth
Service Discovery Protocol (SDP).
config BT_DEBUG_SERVICE
bool "Bluetooth Services debug"
depends on BT_CONN
help
This option enables debug support for the Bluetooth
Services.
endif # BT_DEBUG
config BT_LOG_SNIFFER_INFO
bool "Bluetooth log information for sniffer"
help
This option enables the Bluetooth stack to log information such as
DH private key and LTK keys, which can be used by sniffers to decrypt
the connection without the use of Debug keys.
WARNING: This option prints out private security keys such as
the Long Term Key.
Use of this feature in production is strongly discouraged
config BT_TESTING
bool "Bluetooth Testing"
help
This option enables custom Bluetooth testing interface.
Shall only be used for testing purposes.
config BT_CONN_DISABLE_SECURITY
bool "Disable security"
depends on BT_TESTING
help
This option disables security checks for incoming requests enabling
to test accessing GATT attributes and L2CAP channels that would
otherwise require encryption/authentication in order to be accessed.
WARNING: This option enables anyone to snoop on-air traffic.
Use of this feature in production is strongly discouraged.
config BT_BREDR
bool "Bluetooth BR/EDR support [EXPERIMENTAL]"
depends on BT_HCI_HOST
select BT_PERIPHERAL
select BT_CENTRAL
select BT_SMP
select BT_L2CAP_DYNAMIC_CHANNEL
select EXPERIMENTAL
help
This option enables Bluetooth BR/EDR support
if BT_BREDR
config BT_MAX_SCO_CONN
int "Maximum number of simultaneous SCO connections"
default 1
range 1 3
help
Maximum number of simultaneous Bluetooth synchronous connections
supported. The minimum (and default) number is 1.
config BT_RFCOMM
bool "Bluetooth RFCOMM protocol support [EXPERIMENTAL]"
select EXPERIMENTAL
help
This option enables Bluetooth RFCOMM support
config BT_RFCOMM_L2CAP_MTU
int "L2CAP MTU for RFCOMM frames"
depends on BT_RFCOMM
# RX MTU will be truncated to account for the L2CAP PDU header.
default BT_BUF_ACL_RX_SIZE
range 23 32767
help
Maximum size of L2CAP PDU for RFCOMM frames.
config BT_HFP_HF
bool "Bluetooth Handsfree profile HF Role support [EXPERIMENTAL]"
depends on PRINTK
select BT_RFCOMM
select EXPERIMENTAL
help
This option enables Bluetooth HF support
config BT_AVDTP
bool "Bluetooth AVDTP protocol support [EXPERIMENTAL]"
select EXPERIMENTAL
help
This option enables Bluetooth AVDTP support
config BT_A2DP
bool "Bluetooth A2DP Profile [EXPERIMENTAL]"
select BT_AVDTP
select EXPERIMENTAL
help
This option enables the A2DP profile
config BT_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.
endif # BT_BREDR
config BT_HCI_VS_EVT_USER
bool "User Vendor-Specific event handling"
help
Enable registering a callback for delegating to the user the handling of
VS events that are not known to the stack
endmenu