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source | linux | .. SPDX-License-Identifier: GPL-2.0
==============
6pack Protocol
==============
This is the 6pack-mini-HOWTO, written by
Andreas Könsgen DG3KQ
:Internet: ajk@comnets.uni-bremen.de
:AMPR-net: dg3kq@db0pra.ampr.org
:AX.25: dg3kq@db0ach.#nrw.deu.eu
Last update: April 7, 1998
1. What is 6pack, and what are the ad... | Documentation/networking/6pack.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
======
AF_XDP
======
Overview
========
AF_XDP is an address family that is optimized for high performance
packet processing.
This document assumes that the reader is familiar with BPF and XDP. If
not, the Cilium project has an excellent reference guide at
http://cilium.readthedoc... | Documentation/networking/af_xdp.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
===========
IP-Aliasing
===========
IP-aliases are an obsolete way to manage multiple IP-addresses/masks
per interface. Newer tools such as iproute2 support multiple
address/prefixes per interface, but aliases are still supported
for backwards compatibility.
An alias is formed by ... | Documentation/networking/alias.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
===============
ARCnet Hardware
===============
:Author: Avery Pennarun <apenwarr@worldvisions.ca>
.. note::
1) This file is a supplement to arcnet.rst. Please read that for general
driver configuration help.
2) This file is no longer Linux-specific. It should proba... | Documentation/networking/arcnet-hardware.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
======
ARCnet
======
:Author: Avery Pennarun <apenwarr@worldvisions.ca>
.. note::
See also arcnet-hardware.txt in this directory for jumper-setting
and cabling information if you're like many of us and didn't happen to get a
manual with your ARCnet card.
Since no one se... | Documentation/networking/arcnet.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
===
ATM
===
In order to use anything but the most primitive functions of ATM,
several user-mode programs are required to assist the kernel. These
programs and related material can be found via the ATM on Linux Web
page at http://linux-atm.sourceforge.net/
If you encounter problems... | Documentation/networking/atm.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
=====
AX.25
=====
To use the amateur radio protocols within Linux you will need to get a
suitable copy of the AX.25 Utilities. More detailed information about
AX.25, NET/ROM and ROSE, associated programs and utilities can be
found on https://linux-ax25.in-berlin.de.
There is a mai... | Documentation/networking/ax25.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
========================================
Bare UDP Tunnelling Module Documentation
========================================
There are various L3 encapsulation standards using UDP being discussed to
leverage the UDP based load balancing capability of different networks.
MPLSoUDP (htt... | Documentation/networking/bareudp.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
==========
batman-adv
==========
Batman advanced is a new approach to wireless networking which does no longer
operate on the IP basis. Unlike the batman daemon, which exchanges information
using UDP packets and sets routing tables, batman-advanced operates on ISO/OSI
Layer 2 only ... | Documentation/networking/batman-adv.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
===================================
Linux Ethernet Bonding Driver HOWTO
===================================
Latest update: 27 April 2011
Initial release: Thomas Davis <tadavis at lbl.gov>
Corrections, HA extensions: 2000/10/03-15:
- Willy Tarreau <willy at meta-x.org>
- Cons... | Documentation/networking/bonding.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
=================
Ethernet Bridging
=================
Introduction
============
The IEEE 802.1Q-2022 (Bridges and Bridged Networks) standard defines the
operation of bridges in computer networks. A bridge, in the context of this
standard, is a device that connects two or more netw... | Documentation/networking/bridge.rst | null | null | null | null | null |
source | linux | ===================================
SocketCAN - Controller Area Network
===================================
Overview / What is SocketCAN
============================
The socketcan package is an implementation of CAN protocols
(Controller Area Network) for Linux. CAN is a networking technology
which has widespread us... | Documentation/networking/can.rst | null | null | null | null | null |
source | linux | =================
The UCAN Protocol
=================
UCAN is the protocol used by the microcontroller-based USB-CAN
adapter that is integrated on System-on-Modules from Theobroma Systems
and that is also available as a standalone USB stick.
The UCAN protocol has been designed to be hardware-independent.
It is modele... | Documentation/networking/can_ucan_protocol.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
======================================================
cdc_mbim - Driver for CDC MBIM Mobile Broadband modems
======================================================
The cdc_mbim driver supports USB devices conforming to the "Universal
Serial Bus Communications Class Subclass Specif... | Documentation/networking/cdc_mbim.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
=================
Checksum Offloads
=================
Introduction
============
This document describes a set of techniques in the Linux networking stack to
take advantage of checksum offload capabilities of various NICs.
The following technologies are described:
* TX Checksum ... | Documentation/networking/checksum-offloads.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
======================
DCTCP (DataCenter TCP)
======================
DCTCP is an enhancement to the TCP congestion control algorithm for data
center networks and leverages Explicit Congestion Notification (ECN) in
the data center network to provide multi-bit feedback to the end hos... | Documentation/networking/dctcp.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
=================
Device Memory TCP
=================
Intro
=====
Device memory TCP (devmem TCP) enables receiving data directly into device
memory (dmabuf). The feature is currently implemented for TCP sockets.
Opportunity
-----------
A large number of data transfers have dev... | Documentation/networking/devmem.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
===================
DNS Resolver Module
===================
.. Contents:
- Overview.
- Compilation.
- Setting up.
- Usage.
- Mechanism.
- Debugging.
Overview
========
The DNS resolver module provides a way for kernel services to make DNS queries
by way of requesting a key... | Documentation/networking/dns_resolver.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
=====================
Softnet Driver Issues
=====================
Probing guidelines
==================
Address validation
------------------
Any hardware layer address you obtain for your device should
be verified. For example, for ethernet check it with
linux/etherdevice.h:is_... | Documentation/networking/driver.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
==========================================
EQL Driver: Serial IP Load Balancing HOWTO
==========================================
Simon "Guru Aleph-Null" Janes, simon@ncm.com
v1.1, February 27, 1995
This is the manual for the EQL device driver. EQL is a software device
tha... | Documentation/networking/eql.rst | null | null | null | null | null |
source | linux | =============================
Netlink interface for ethtool
=============================
Basic information
=================
Netlink interface for ethtool uses generic netlink family ``ethtool``
(userspace application should use macros ``ETHTOOL_GENL_NAME`` and
``ETHTOOL_GENL_VERSION`` defined in ``<linux/ethtool_n... | Documentation/networking/ethtool-netlink.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
========
FAILOVER
========
Overview
========
The failover module provides a generic interface for paravirtual drivers
to register a netdev and a set of ops with a failover instance. The ops
are used as event handlers that get called to handle netdev register/
unregister/link chang... | Documentation/networking/failover.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
============================
LC-trie implementation notes
============================
Node types
----------
leaf
An end node with data. This has a copy of the relevant key, along
with 'hlist' with routing table entries sorted by prefix length.
See struct leaf and struct leaf_in... | Documentation/networking/fib_trie.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
.. _networking-filter:
=======================================================
Linux Socket Filtering aka Berkeley Packet Filter (BPF)
=======================================================
Notice
------
This file used to document the eBPF format and mechanisms even when not
rel... | Documentation/networking/filter.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
===============================================
Generic networking statistics for netlink users
===============================================
Statistic counters are grouped into structs:
==================== ===================== =====================
Struct TLV ty... | Documentation/networking/gen_stats.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
==================
Generic HDLC layer
==================
Krzysztof Halasa <khc@pm.waw.pl>
Generic HDLC layer currently supports:
1. Frame Relay (ANSI, CCITT, Cisco and no LMI)
- Normal (routed) and Ethernet-bridged (Ethernet device emulation)
interfaces can share a sing... | Documentation/networking/generic-hdlc.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
===============
Generic Netlink
===============
A wiki document on how to use Generic Netlink can be found here:
* https://wiki.linuxfoundation.org/networking/generic_netlink_howto | Documentation/networking/generic_netlink.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
=====================================
The Linux kernel GTP tunneling module
=====================================
Documentation by
Harald Welte <laforge@gnumonks.org> and
Andreas Schultz <aschultz@tpip.net>
In 'drivers/net/gtp.c' you are finding a kernel-level implementation... | Documentation/networking/gtp.rst | null | null | null | null | null |
source | linux | ===============================
IEEE 802.15.4 Developer's Guide
===============================
Introduction
============
The IEEE 802.15.4 working group focuses on standardization of the bottom
two layers: Medium Access Control (MAC) and Physical access (PHY). And there
are mainly two options available for upper laye... | Documentation/networking/ieee802154.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
===================================
Identifier Locator Addressing (ILA)
===================================
Introduction
============
Identifier-locator addressing (ILA) is a technique used with IPv6 that
differentiates between location and identity of a network node. Part of an
... | Documentation/networking/ila.rst | null | null | null | null | null |
source | linux | Networking
==========
Refer to :ref:`netdev-FAQ` for a guide on netdev development process specifics.
Contents:
.. toctree::
:maxdepth: 2
af_xdp
bareudp
batman-adv
can
can_ucan_protocol
device_drivers/index
diagnostic/index
dsa/index
devlink/index
caif/index
ethtool-netlink
ie... | Documentation/networking/index.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
=====================
IOAM6 Sysfs variables
=====================
/proc/sys/net/conf/<iface>/ioam6_* variables:
=============================================
ioam6_enabled - BOOL
Accept (= enabled) or ignore (= disabled) IPv6 IOAM options on ingress
for this inter... | Documentation/networking/ioam6-sysctl.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
=====================
io_uring zero copy Rx
=====================
Introduction
============
io_uring zero copy Rx (ZC Rx) is a feature that removes kernel-to-user copy on
the network receive path, allowing packet data to be received directly into
userspace memory. This feature is ... | Documentation/networking/iou-zcrx.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
=========
IP Sysctl
=========
/proc/sys/net/ipv4/* Variables
==============================
ip_forward - BOOLEAN
Forward Packets between interfaces.
This variable is special, its change resets all configuration
parameters to their default state (RFC1122 for hosts, RFC1812
for... | Documentation/networking/ip-sysctl.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
==================================
IP dynamic address hack-port v0.03
==================================
This stuff allows diald ONESHOT connections to get established by
dynamically changing packet source address (and socket's if local procs).
It is implemented for TCP diald-box c... | Documentation/networking/ip_dynaddr.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
=====
IPsec
=====
Here documents known IPsec corner cases which need to be keep in mind when
deploy various IPsec configuration in real world production environment.
1. IPcomp:
Small IP packet won't get compressed at sender, and failed on
policy check on receiver.
Quote ... | Documentation/networking/ipsec.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
====
IPv6
====
Options for the ipv6 module are supplied as parameters at load time.
Module options may be given as command line arguments to the insmod
or modprobe command, but are usually specified in either
``/etc/modules.d/*.conf`` configuration files, or in a distro-specific
... | Documentation/networking/ipv6.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
===================
IPVLAN Driver HOWTO
===================
Initial Release:
Mahesh Bandewar <maheshb AT google.com>
1. Introduction:
================
This is conceptually very similar to the macvlan driver with one major
exception of using L3 for mux-ing /demux-ing among slaves.... | Documentation/networking/ipvlan.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
===========
IPvs-sysctl
===========
/proc/sys/net/ipv4/vs/* Variables:
==================================
am_droprate - INTEGER
default 10
It sets the always mode drop rate, which is used in the mode 3
of the drop_rate defense.
amemthresh - INTEGER
default 1024
It sets the... | Documentation/networking/ipvs-sysctl.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause)
====================
ISO 15765-2 (ISO-TP)
====================
Overview
========
ISO 15765-2, also known as ISO-TP, is a transport protocol specifically defined
for diagnostic communication on CAN. It is widely used in the automotive
industry, for example as the ... | Documentation/networking/iso15765-2.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: (GPL-2.0 OR MIT)
===================
J1939 Documentation
===================
Overview / What Is J1939
========================
SAE J1939 defines a higher layer protocol on CAN. It implements a more
sophisticated addressing scheme and extends the maximum packet size above 8
bytes. Several ... | Documentation/networking/j1939.rst | null | null | null | null | null |
source | linux | =========================================
Linux Networking and Network Devices APIs
=========================================
Linux Networking
================
Networking Base Types
---------------------
.. kernel-doc:: include/linux/net.h
:internal:
Socket Buffer Functions
-----------------------
.. kernel-doc... | Documentation/networking/kapi.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
=============================
Kernel Connection Multiplexor
=============================
Kernel Connection Multiplexor (KCM) is a mechanism that provides a message based
interface over TCP for generic application protocols. With KCM an application
can efficiently send and receive ... | Documentation/networking/kcm.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
====
L2TP
====
Layer 2 Tunneling Protocol (L2TP) allows L2 frames to be tunneled over
an IP network.
This document covers the kernel's L2TP subsystem. It documents kernel
APIs for application developers who want to use the L2TP subsystem and
it provides some technical details abou... | Documentation/networking/l2tp.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
===============================
The Linux LAPB Module Interface
===============================
Version 1.3
Jonathan Naylor 29.12.96
Changed (Henner Eisen, 2000-10-29): int return value for data_indication()
The LAPB module will be a separately compiled module for use by any par... | Documentation/networking/lapb-module.rst | null | null | null | null | null |
source | linux | #
# This outlines the Linux authentication/association and
# deauthentication/disassociation flows.
#
# This can be converted into a diagram using the service
# at http://www.websequencediagrams.com/
#
participant userspace
participant mac80211
participant driver
alt authentication needed (not FT)
userspace->mac80211... | Documentation/networking/mac80211-auth-assoc-deauth.txt | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
=========================================
How to use packet injection with mac80211
=========================================
mac80211 now allows arbitrary packets to be injected down any Monitor Mode
interface from userland. The packet you inject needs to be composed in the
follo... | Documentation/networking/mac80211-injection.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
==============================================
Management Component Transport Protocol (MCTP)
==============================================
net/mctp/ contains protocol support for MCTP, as defined by DMTF standard
DSP0236. Physical interface drivers ("bindings" in the specificatio... | Documentation/networking/mctp.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
====================
MPLS Sysfs variables
====================
/proc/sys/net/mpls/* Variables:
===============================
platform_labels - INTEGER
Number of entries in the platform label table. It is not
possible to configure forwarding for label values equal to or
great... | Documentation/networking/mpls-sysctl.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
=====================
MPTCP Sysfs variables
=====================
/proc/sys/net/mptcp/* Variables
===============================
add_addr_timeout - INTEGER (seconds)
Set the maximum value of timeout after which an ADD_ADDR control message
will be resent to an MPTCP peer that ha... | Documentation/networking/mptcp-sysctl.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
=====================
Multipath TCP (MPTCP)
=====================
Introduction
============
Multipath TCP or MPTCP is an extension to the standard TCP and is described in
`RFC 8684 (MPTCPv1) <https://www.rfc-editor.org/rfc/rfc8684.html>`_. It allows a
device to make use of multipl... | Documentation/networking/mptcp.rst | null | null | null | null | null |
source | linux | ============
MSG_ZEROCOPY
============
Intro
=====
The MSG_ZEROCOPY flag enables copy avoidance for socket send calls.
The feature is currently implemented for TCP, UDP and VSOCK (with
virtio transport) sockets.
Opportunity and Caveats
-----------------------
Copying large buffers between user process and kernel c... | Documentation/networking/msg_zerocopy.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
.. include:: <isonum.txt>
===============
Multi-PF Netdev
===============
Contents
========
- `Background`_
- `Overview`_
- `mlx5 implementation`_
- `Channels distribution`_
- `Observability`_
- `Steering`_
- `Mutually exclusive features`_
Background
==========
The Multi-PF NIC ... | Documentation/networking/multi-pf-netdev.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
===========================================
HOWTO for multiqueue network device support
===========================================
Section 1: Base driver requirements for implementing multiqueue support
=======================================================================
Intro... | Documentation/networking/multiqueue.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
.. _napi:
====
NAPI
====
NAPI is the event handling mechanism used by the Linux networking stack.
The name NAPI no longer stands for anything in particular [#]_.
In basic operation the device notifies the host about new events
via an interrupt.
The host the... | Documentation/networking/napi.rst | null | null | null | null | null |
source | linux | ======================================================
Net DIM - Generic Network Dynamic Interrupt Moderation
======================================================
:Author: Tal Gilboa <talgi@mellanox.com>
.. contents:: :depth: 2
Assumptions
===========
This document assumes the reader has basic knowledge in networ... | Documentation/networking/net_dim.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
============
NET_FAILOVER
============
Overview
========
The net_failover driver provides an automated failover mechanism via APIs
to create and destroy a failover master netdev and manages a primary and
standby slave netdevs that get registered via the generic failover
infrastruc... | Documentation/networking/net_failover.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
==========
Netconsole
==========
started by Ingo Molnar <mingo@redhat.com>, 2001.09.17
2.6 port and netpoll api by Matt Mackall <mpm@selenic.com>, Sep 9 2003
IPv6 support by Cong Wang <xiyou.wangcong@gmail.com>, Jan 1 2013
Extended console support by Tejun Heo <tj@kernel.org>, ... | Documentation/networking/netconsole.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
=====================================================
Netdev features mess and how to get out from it alive
=====================================================
Author:
Michał Mirosław <mirq-linux@rere.qmqm.pl>
Part I: Feature sets
====================
Long gone are the days ... | Documentation/networking/netdev-features.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
=====================================
Network Devices, the Kernel, and You!
=====================================
Introduction
============
The following is a random collection of documentation regarding
network devices. It is intended for driver developers.
struct net_device lif... | Documentation/networking/netdevices.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
=========================
Netfilter Sysfs variables
=========================
/proc/sys/net/netfilter/* Variables:
====================================
nf_log_all_netns - BOOLEAN
- 0 - disabled (default)
- not 0 - enabled
By default, only init_net namespace can log packets int... | Documentation/networking/netfilter-sysctl.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
===============
NETIF Msg Level
===============
The design of the network interface message level setting.
History
-------
The design of the debugging message interface was guided and
constrained by backwards compatibility previous practice. It is useful
to understand the his... | Documentation/networking/netif-msg.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
==================================
Netmem Support for Network Drivers
==================================
This document outlines the requirements for network drivers to support netmem,
an abstract memory type that enables features like device memory TCP. By
supporting netmem, driver... | Documentation/networking/netmem.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
=========================
Resilient Next-hop Groups
=========================
Resilient groups are a type of next-hop group that is aimed at minimizing
disruption in flow routing across changes to the group composition and
weights of constituent next hops.
The idea behind resilien... | Documentation/networking/nexthop-group-resilient.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
===================================
Netfilter Conntrack Sysfs variables
===================================
/proc/sys/net/netfilter/nf_conntrack_* Variables:
=================================================
nf_conntrack_acct - BOOLEAN
- 0 - disabled (default)
- not 0 - enabled
... | Documentation/networking/nf_conntrack-sysctl.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
====================================
Netfilter's flowtable infrastructure
====================================
This documentation describes the Netfilter flowtable infrastructure which allows
you to define a fastpath through the flowtable datapath. This infrastructure
also provides... | Documentation/networking/nf_flowtable.rst | null | null | null | null | null |
source | linux | ===================
Linux NFC subsystem
===================
The Near Field Communication (NFC) subsystem is required to standardize the
NFC device drivers development and to create an unified userspace interface.
This document covers the architecture overview, the device driver interface
description and the userspace... | Documentation/networking/nfc.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0+
=========================================================================
OPEN Alliance 10BASE-T1x MAC-PHY Serial Interface (TC6) Framework Support
=========================================================================
Introduction
------------
The IEEE 802.3cg project defines... | Documentation/networking/oa-tc6-framework.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
=============================================
Open vSwitch datapath developer documentation
=============================================
The Open vSwitch kernel module allows flexible userspace control over
flow-level packet processing on selected network devices. It can be
used ... | Documentation/networking/openvswitch.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
==================
Operational States
==================
1. Introduction
===============
Linux distinguishes between administrative and operational state of an
interface. Administrative state is the result of "ip link set dev
<dev> up or down" and reflects whether the administrat... | Documentation/networking/operstates.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
===========
Packet MMAP
===========
Abstract
========
This file documents the mmap() facility available with the PACKET
socket interface. This type of sockets is used for
i) capture network traffic with utilities like tcpdump,
ii) transmit network traffic, or any other that needs... | Documentation/networking/packet_mmap.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
=============
Page Pool API
=============
.. kernel-doc:: include/net/page_pool/helpers.h
:doc: page_pool allocator
Architecture overview
=====================
.. code-block:: none
+------------------+
| Driver |
+------------------+
^
... | Documentation/networking/page_pool.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
.. include:: <isonum.txt>
============================
Linux Phonet protocol family
============================
Introduction
------------
Phonet is a packet protocol used by Nokia cellular modems for both IPC
and RPC. With the Linux Phonet socket family, Linux host processes can
... | Documentation/networking/phonet.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
.. _phy_link_topology:
=================
PHY link topology
=================
Overview
========
The PHY link topology representation in the networking stack aims at representing
the hardware layout for any given Ethernet link.
An Ethernet interface from userspace's point of view i... | Documentation/networking/phy-link-topology.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
.. _phy_port:
=================
Ethernet ports
=================
This document is a basic description of the phy_port infrastructure,
introduced to represent physical interfaces of Ethernet devices.
Without phy_port, we already have quite a lot of information about what the
media-... | Documentation/networking/phy-port.rst | null | null | null | null | null |
source | linux | =====================
PHY Abstraction Layer
=====================
Purpose
=======
Most network devices consist of set of registers which provide an interface
to a MAC layer, which communicates with the physical connection through a
PHY. The PHY concerns itself with negotiating link parameters with the link
partner o... | Documentation/networking/phy.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
====================================
HOWTO for the linux packet generator
====================================
Enable CONFIG_NET_PKTGEN to compile and build pktgen either in-kernel
or as a module. A module is preferred; modprobe pktgen if needed. Once
running, pktgen creates a th... | Documentation/networking/pktgen.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
================================================
PLIP: The Parallel Line Internet Protocol Device
================================================
Donald Becker (becker@super.org)
I.D.A. Supercomputing Research Center, Bowie MD 20715
At some point T. Thorn will probably contribute... | Documentation/networking/plip.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
========================================
PPP Generic Driver and Channel Interface
========================================
Paul Mackerras
paulus@samba.org
7 Feb 2002
The generic PPP driver in linux-2.4 provides an implementation of the
functionality which is ... | Documentation/networking/ppp_generic.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
============================================
The proc/net/tcp and proc/net/tcp6 variables
============================================
This document describes the interfaces /proc/net/tcp and /proc/net/tcp6.
Note that these interfaces are deprecated in favor of tcp_diag.
These /pr... | Documentation/networking/proc_net_tcp.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0-only
=====================
PSP Security Protocol
=====================
Protocol
========
PSP Security Protocol (PSP) was defined at Google and published in:
https://raw.githubusercontent.com/google/psp/main/doc/PSP_Arch_Spec.pdf
This section briefly covers protocol aspects cruci... | Documentation/networking/psp.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
===========================
How to use radiotap headers
===========================
Pointer to the radiotap include file
------------------------------------
Radiotap headers are variable-length and extensible, you can get most of the
information you need to know on them from::
... | Documentation/networking/radiotap-headers.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
===
RDS
===
Overview
========
This readme tries to provide some background on the hows and whys of RDS,
and will hopefully help you find your way around the code.
In addition, please see this email about RDS origins:
http://oss.oracle.com/pipermail/rds-devel/2007-November/000228.... | Documentation/networking/rds.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
=======================================
Linux wireless regulatory documentation
=======================================
This document gives a brief review over how the Linux wireless
regulatory infrastructure works.
More up to date information can be obtained at the project's web ... | Documentation/networking/regulatory.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
.. _representors:
=============================
Network Function Representors
=============================
This document describes the semantics and usage of representor netdevices, as
used to control internal switching on SmartNICs. For the closely-related port
representors on p... | Documentation/networking/representors.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
======================
RxRPC Network Protocol
======================
The RxRPC protocol driver provides a reliable two-phase transport on top of UDP
that can be used to perform RxRPC remote operations. This is done over sockets
of AF_RXRPC family, using sendmsg() and recvmsg() wit... | Documentation/networking/rxrpc.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
=====================================
Scaling in the Linux Networking Stack
=====================================
Introduction
============
This document describes a set of complementary techniques in the Linux
networking stack to increase parallelism and improve performance for
... | Documentation/networking/scaling.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
=================
Linux Kernel SCTP
=================
This is the current BETA release of the Linux Kernel SCTP reference
implementation.
SCTP (Stream Control Transmission Protocol) is a IP based, message oriented,
reliable transport protocol, with congestion control, support for
... | Documentation/networking/sctp.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
=================
LSM/SeLinux secid
=================
flowi structure:
The secid member in the flow structure is used in LSMs (e.g. SELinux) to indicate
the label of the flow. This label of the flow is currently used in selecting
matching labeled xfrm(s).
If this is an outbound f... | Documentation/networking/secid.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
====================
Seg6 Sysfs variables
====================
/proc/sys/net/conf/<iface>/seg6_* variables:
============================================
seg6_enabled - BOOL
Accept or drop SR-enabled IPv6 packets on this interface.
Relevant packets are those with SRH present an... | Documentation/networking/seg6-sysctl.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
=====================
Segmentation Offloads
=====================
Introduction
============
This document describes a set of techniques in the Linux networking stack
to take advantage of segmentation offload capabilities of various NICs.
The following technologies are described:... | Documentation/networking/segmentation-offloads.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
=======
phylink
=======
Overview
========
phylink is a mechanism to support hot-pluggable networking modules
directly connected to a MAC without needing to re-initialise the
adapter on hot-plug events.
phylink supports conventional phylib-based setups, fixed link setups
and SFP (... | Documentation/networking/sfp-phylink.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
struct sk_buff
==============
:c:type:`sk_buff` is the main networking structure representing
a packet.
Basic sk_buff geometry
----------------------
.. kernel-doc:: include/linux/skbuff.h
:doc: Basic sk_buff geometry
Shared skbs and skb clones
--------------------------
:c:... | Documentation/networking/skbuff.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
==========
SMC Sysctl
==========
/proc/sys/net/smc/* Variables
=============================
autocorking_size - INTEGER
Setting SMC auto corking size:
SMC auto corking is like TCP auto corking from the application's
perspective of view. When applications do consecutive small
w... | Documentation/networking/smc-sysctl.rst | null | null | null | null | null |
source | linux | ============
SNMP counter
============
This document explains the meaning of SNMP counters.
General IPv4 counters
=====================
All layer 4 packets and ICMP packets will change these counters, but
these counters won't be changed by layer 2 packets (such as STP) or
ARP packets.
* IpInReceives
Defined in `RFC... | Documentation/networking/snmp_counter.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
===============
NIC SR-IOV APIs
===============
Modern NICs are strongly encouraged to focus on implementing the ``switchdev``
model (see :ref:`switchdev`) to configure forwarding and security of SR-IOV
functionality.
Legacy API
==========
The old SR-IOV API is implemented in ``r... | Documentation/networking/sriov.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
====================
Interface statistics
====================
Overview
========
This document is a guide to Linux network interface statistics.
There are three main sources of interface statistics in Linux:
- standard interface statistics based on
:c:type:`struct rtnl_link_... | Documentation/networking/statistics.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
=========================
Stream Parser (strparser)
=========================
Introduction
============
The stream parser (strparser) is a utility that parses messages of an
application layer protocol running over a data stream. The stream
parser works in conjunction with an upper... | Documentation/networking/strparser.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
.. include:: <isonum.txt>
.. _switchdev:
===============================================
Ethernet switch device driver model (switchdev)
===============================================
Copyright |copy| 2014 Jiri Pirko <jiri@resnulli.us>
Copyright |copy| 2014-2015 Scott Feldman <sf... | Documentation/networking/switchdev.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
=============
Sysfs tagging
=============
(Taken almost verbatim from Eric Biederman's netns tagging patch
commit msg)
The problem. Network devices show up in sysfs and with the network
namespace active multiple devices with the same name can show up in
the same directory, ouch!
... | Documentation/networking/sysfs-tagging.rst | null | null | null | null | null |
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