nuttx/net/bluetooth/Kconfig

#
# For a description of the syntax of this configuration file,
# see the file kconfig-language.txt in the NuttX tools repository.
#

menu "Bluetooth socket support"

config NET_BLUETOOTH
	bool "Bluetooth socket support"
	default n
	depends on WIRELESS_BLUETOOTH
	select NETDEV_IOCTL
	---help---
		Enable support for raw, Bluetooth sockets.

		Raw sockets allow receiving and transmitting Bluetooth radio
		frames without a layer2 protocol such as 6LoWPAN in between. Frames
		received are copied into a Bluetooth socket tap before they
		enter the network. Frames written into a Bluetooth socket will
		bypass the network altogether and will be sent directly to the
		Bluetooth MAC network interface driver outgoing frame queue.

if NET_BLUETOOTH

config NET_BLUETOOTH_PREALLOC_CONNS
	int "Preallocated Bluetooth sockets"
	default 4
	---help---
		Number of Bluetooth connections (all tasks).
		
		This number of connections will be pre-allocated during system boot.
		If dynamic connections allocation is enabled, more connections may
		be allocated at a later time, as the system needs them. Else this
		will be the maximum number of connections available to the system
		at all times.

		Set to 0 to disable (and rely only on dynamic allocations).

config NET_BLUETOOTH_ALLOC_CONNS
	int "Dynamic Bluetooth connections allocation"
	default 0
	---help---
		Dynamic memory allocations for Bluetooth.

		When set to 0 all dynamic allocations are disabled.

		When set to 1 a new connection will be allocated every time,
		and it will be free'd when no longer needed.

		Setting this to 2 or more will allocate the connections in
		batches (with batch size equal to this config). When a
		connection is no longer needed, it will be returned to the
		free connections pool, and it will never be deallocated!

config NET_BLUETOOTH_MAX_CONNS
	int "Maximum number of Bluetooth connections"
	default 0
	depends on NET_BLUETOOTH_ALLOC_CONNS > 0
	---help---
		If dynamic connections allocation is selected (NET_BLUETOOTH_ALLOC_CONNS > 0)
		this will limit the number of connections that can be allocated.
		
		This is useful in case the system is under very heavy load (or
		under attack), ensuring that the heap will not be exhausted.

config NET_BLUETOOTH_NCONTAINERS
	int "Number of pre-allocated frame containers"
	default 8
	---help---
		This specifies the total number of preallocated frame containers.
		One must be allocated with each incoming frame.

config NET_BLUETOOTH_BACKLOG
	int "Maximum frame backlog"
	default 8
	range 0 255
	---help---
		As frames are received, they are held in an RX queue.  They remain
		in the RX queue until application logic reads the queue frames.  To
		prevent overrun, the maximum backlog may be set to a nonzero value.
		When the backlog of queue frames reaches that count, the old frame
		will be freed, preventing overrun at the cost of losing the oldest
		frames.

		NOTE: The special value of zero will disable all backlog checks.

endif # NET_BLUETOOTH
endmenu # Bluetooth Socket Support