:orphan:

.. title:: CONFIG_BT_ATT_ENFORCE_FLOW

.. kconfig:: CONFIG_BT_ATT_ENFORCE_FLOW

CONFIG_BT_ATT_ENFORCE_FLOW
##########################

*Enforce strict flow control semantics for incoming PDUs*

Type: ``bool``

Help
====

.. code-block:: none

    Enforce flow control rules on incoming PDUs, preventing a peer
    from sending new requests until a previous one has been responded
    or sending a new indication until a previous one has been
    confirmed. This may need to be disabled to avoid potential race
    conditions arising from a USB based HCI transport that splits
    HCI events and ACL data to separate endpoints.

Direct dependencies
===================

\ :kconfig:`BT_CONN <CONFIG_BT_CONN>` && \ :kconfig:`BT_HCI_HOST <CONFIG_BT_HCI_HOST>` && \ :kconfig:`BT_HCI <CONFIG_BT_HCI>` && \ :kconfig:`BT <CONFIG_BT>`

*(Includes any dependencies from ifs and menus.)*

Default
=======

- y if !(\ :kconfig:`BOARD_QEMU_CORTEX_M3 <CONFIG_BOARD_QEMU_CORTEX_M3>` || \ :kconfig:`BOARD_QEMU_X86 <CONFIG_BOARD_QEMU_X86>` || \ :kconfig:`ARCH_POSIX <CONFIG_ARCH_POSIX>`)

Kconfig definition
==================



At ``<Zephyr Subsystem>/bluetooth/host/Kconfig.gatt:8``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:44`` → ``<Zephyr Subsystem>/Kconfig:9`` → ``<Zephyr Subsystem>/bluetooth/Kconfig:174`` → ``<Zephyr Subsystem>/bluetooth/host/Kconfig:454``

Menu path: (Top) → Sub Systems and OS Services → Bluetooth → ATT and GATT Options

.. code-block:: kconfig

    config BT_ATT_ENFORCE_FLOW
    	bool "Enforce strict flow control semantics for incoming PDUs"
    	default y if !(BOARD_QEMU_CORTEX_M3 || BOARD_QEMU_X86 || ARCH_POSIX)
    	depends on BT_CONN && BT_HCI_HOST && BT_HCI && BT
    	help
    	  Enforce flow control rules on incoming PDUs, preventing a peer
    	  from sending new requests until a previous one has been responded
    	  or sending a new indication until a previous one has been
    	  confirmed. This may need to be disabled to avoid potential race
    	  conditions arising from a USB based HCI transport that splits
    	  HCI events and ACL data to separate endpoints.

*(The 'depends on' condition includes propagated dependencies from ifs and menus.)*