:orphan:

.. title:: NET_BUF_USER_DATA_SIZE

.. option:: CONFIG_NET_BUF_USER_DATA_SIZE

*Size of user\_data available in every network buffer*

Type: ``int``

Help
====

.. code-block:: none

    Amount of memory reserved in each network buffer for user data. In
    most cases this can be left as the default value.

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

\ :option:`NET_BUF <CONFIG_NET_BUF>`

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

Defaults
========

- 8 if ((\ :option:`BT <CONFIG_BT>` || \ :option:`NET_TCP2 <CONFIG_NET_TCP2>`) && \ :option:`64BIT <CONFIG_64BIT>`) || \ :option:`BT_ISO <CONFIG_BT_ISO>`
- 4

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



At ``<Zephyr Subsystem>/net/Kconfig:16``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:34`` → ``<Zephyr Subsystem>/Kconfig:39``

Menu path: (Top) → Sub Systems and OS Services → Networking → Network buffer support

.. code-block:: kconfig

    config NET_BUF_USER_DATA_SIZE
    	int "Size of user_data available in every network buffer"
    	range 4 65535 if BT || NET_TCP2
    	range 0 65535
    	default 8 if ((BT || NET_TCP2) && 64BIT) || BT_ISO
    	default 4
    	depends on NET_BUF
    	help
    	  Amount of memory reserved in each network buffer for user data. In
    	  most cases this can be left as the default value.

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