subsys/mgmt/mcumgr/grp/settings_mgmt/Kconfig

# Copyright Nordic Semiconductor ASA 2023. All rights reserved.
# SPDX-License-Identifier: Apache-2.0

menuconfig MCUMGR_GRP_SETTINGS
	bool "MCUmgr handlers for settings management"
	depends on SETTINGS
	depends on SETTINGS_RUNTIME
	select MCUMGR_SMP_CBOR_MIN_DECODING_LEVEL_2
	select MCUMGR_SMP_CBOR_MIN_ENCODING_LEVEL_2 if ZCBOR_CANONICAL
	select MCUMGR_SMP_CBOR_MIN_ENCODING_LEVEL_1
	help
	  Enables MCUmgr handlers for settings manipulation.

if MCUMGR_GRP_SETTINGS

choice MCUMGR_GRP_SETTINGS_BUFFER_TYPE
	prompt "Buffer type"
	default MCUMGR_GRP_SETTINGS_BUFFER_TYPE_STACK
	help
	  Selects if the stack or heap will be used for variables that are
	  needed when processing requests.

config MCUMGR_GRP_SETTINGS_BUFFER_TYPE_STACK
	bool "Stack (fixed size)"
	help
	  Use a fixed size stack buffer, any user-supplied values longer than
	  this will be rejected.

	  Note that stack usage for parameter storage alone will be
	  MCUMGR_GRP_SETTINGS_NAME_LEN + MCUMGR_GRP_SETTINGS_VALUE_LEN,
	  therefore the MCUmgr stack should be appropriately sized.

config MCUMGR_GRP_SETTINGS_BUFFER_TYPE_HEAP
	bool "Heap (dynamic size)"
	depends on COMMON_LIBC_MALLOC_ARENA_SIZE > 0
	help
	  Use dynamic heap memory allocation through malloc, if there is
	  insufficient heap memory for the allocation then the request will be
	  rejected.

endchoice

config MCUMGR_GRP_SETTINGS_NAME_LEN
	int "Maximum setting name length"
	default 32
	help
	  Maximum length of a key to lookup, this will be the size of the
	  variable if placed on the stack or the maximum allocated size of the
	  variable if placed on the heap.

config MCUMGR_GRP_SETTINGS_VALUE_LEN
	int "Maximum setting value length"
	default 32
	help
	  Maximum length of a value to read, this will be the size of the
	  variable if placed on the stack or the allocated size of the
	  variable if placed on the heap (settings does not support getting
	  the size of a value prior to looking it up).

config MCUMGR_GRP_SETTINGS_ACCESS_HOOK
	bool "Settings access hook"
	depends on MCUMGR_MGMT_NOTIFICATION_HOOKS
	help
	  Allows applications to control settings management access by
	  registering for a callback which is then triggered whenever a
	  settings read or write attempt is made.

endif