# SPDX-License-Identifier: GPL-2.0-only

  #
  # Network configuration
  #

  menuconfig NET

  	bool "Networking support"

  	select NLATTR

  	select GENERIC_NET_UTILS

  	select BPF

  	help

  	  Unless you really know what you are doing, you should say Y here.
  	  The reason is that some programs need kernel networking support even
  	  when running on a stand-alone machine that isn't connected to any

  	  other computer.

  	  If you are upgrading from an older kernel, you

  	  should consider updating your networking tools too because changes
  	  in the kernel and the tools often go hand in hand. The tools are
  	  contained in the package net-tools, the location and version number
  	  of which are given in <file:Documentation/Changes>.
  
  	  For a general introduction to Linux networking, it is highly
  	  recommended to read the NET-HOWTO, available from
  	  <http://www.tldp.org/docs.html#howto>.

  if NET

  config WANT_COMPAT_NETLINK_MESSAGES
  	bool
  	help
  	  This option can be selected by other options that need compat
  	  netlink messages.
  
  config COMPAT_NETLINK_MESSAGES
  	def_bool y
  	depends on COMPAT

  	depends on WEXT_CORE || WANT_COMPAT_NETLINK_MESSAGES

  	help
  	  This option makes it possible to send different netlink messages
  	  to tasks depending on whether the task is a compat task or not. To
  	  achieve this, you need to set skb_shinfo(skb)->frag_list to the
  	  compat skb before sending the skb, the netlink code will sort out
  	  which message to actually pass to the task.
  
  	  Newly written code should NEVER need this option but do
  	  compat-independent messages instead!

  config NET_INGRESS
  	bool

  config NET_EGRESS
  	bool

  config NET_REDIRECT
  	bool

  config SKB_EXTENSIONS
  	bool

  menu "Networking options"

  source "net/packet/Kconfig"
  source "net/unix/Kconfig"

  source "net/tls/Kconfig"

  source "net/xfrm/Kconfig"

  source "net/iucv/Kconfig"

  source "net/smc/Kconfig"

  source "net/xdp/Kconfig"

  
  config INET
  	bool "TCP/IP networking"

  	help

  	  These are the protocols used on the Internet and on most local
  	  Ethernets. It is highly recommended to say Y here (this will enlarge

  	  your kernel by about 400 KB), since some programs (e.g. the X window

  	  system) use TCP/IP even if your machine is not connected to any
  	  other computer. You will get the so-called loopback device which
  	  allows you to ping yourself (great fun, that!).
  
  	  For an excellent introduction to Linux networking, please read the
  	  Linux Networking HOWTO, available from
  	  <http://www.tldp.org/docs.html#howto>.
  
  	  If you say Y here and also to "/proc file system support" and
  	  "Sysctl support" below, you can change various aspects of the
  	  behavior of the TCP/IP code by writing to the (virtual) files in
  	  /proc/sys/net/ipv4/*; the options are explained in the file

  	  <file:Documentation/networking/ip-sysctl.rst>.

  
  	  Short answer: say Y.

  if INET

  source "net/ipv4/Kconfig"

  source "net/ipv6/Kconfig"

  source "net/netlabel/Kconfig"

  source "net/mptcp/Kconfig"

  endif # if INET

  config NETWORK_SECMARK
  	bool "Security Marking"
  	help
  	  This enables security marking of network packets, similar
  	  to nfmark, but designated for security purposes.
  	  If you are unsure how to answer this question, answer N.

  config NET_PTP_CLASSIFY
  	def_bool n

  config NETWORK_PHY_TIMESTAMPING
  	bool "Timestamping in PHY devices"

  	select NET_PTP_CLASSIFY

  	help

  	  This allows timestamping of network packets by PHYs (or
  	  other MII bus snooping devices) with hardware timestamping
  	  capabilities. This option adds some overhead in the transmit
  	  and receive paths.

  
  	  If you are unsure how to answer this question, answer N.

  menuconfig NETFILTER

  	bool "Network packet filtering framework (Netfilter)"

  	help

  	  Netfilter is a framework for filtering and mangling network packets
  	  that pass through your Linux box.
  
  	  The most common use of packet filtering is to run your Linux box as
  	  a firewall protecting a local network from the Internet. The type of
  	  firewall provided by this kernel support is called a "packet
  	  filter", which means that it can reject individual network packets
  	  based on type, source, destination etc. The other kind of firewall,
  	  a "proxy-based" one, is more secure but more intrusive and more
  	  bothersome to set up; it inspects the network traffic much more
  	  closely, modifies it and has knowledge about the higher level
  	  protocols, which a packet filter lacks. Moreover, proxy-based
  	  firewalls often require changes to the programs running on the local
  	  clients. Proxy-based firewalls don't need support by the kernel, but
  	  they are often combined with a packet filter, which only works if
  	  you say Y here.
  
  	  You should also say Y here if you intend to use your Linux box as
  	  the gateway to the Internet for a local network of machines without
  	  globally valid IP addresses. This is called "masquerading": if one
  	  of the computers on your local network wants to send something to
  	  the outside, your box can "masquerade" as that computer, i.e. it
  	  forwards the traffic to the intended outside destination, but
  	  modifies the packets to make it look like they came from the
  	  firewall box itself. It works both ways: if the outside host
  	  replies, the Linux box will silently forward the traffic to the
  	  correct local computer. This way, the computers on your local net
  	  are completely invisible to the outside world, even though they can
  	  reach the outside and can receive replies. It is even possible to
  	  run globally visible servers from within a masqueraded local network
  	  using a mechanism called portforwarding. Masquerading is also often
  	  called NAT (Network Address Translation).
  
  	  Another use of Netfilter is in transparent proxying: if a machine on
  	  the local network tries to connect to an outside host, your Linux
  	  box can transparently forward the traffic to a local server,
  	  typically a caching proxy server.
  
  	  Yet another use of Netfilter is building a bridging firewall. Using
  	  a bridge with Network packet filtering enabled makes iptables "see"
  	  the bridged traffic. For filtering on the lower network and Ethernet
  	  protocols over the bridge, use ebtables (under bridge netfilter
  	  configuration).
  
  	  Various modules exist for netfilter which replace the previous
  	  masquerading (ipmasqadm), packet filtering (ipchains), transparent
  	  proxying, and portforwarding mechanisms. Please see
  	  <file:Documentation/Changes> under "iptables" for the location of
  	  these packages.

  if NETFILTER

  config NETFILTER_ADVANCED
  	bool "Advanced netfilter configuration"
  	depends on NETFILTER
  	default y
  	help
  	  If you say Y here you can select between all the netfilter modules.

  	  If you say N the more unusual ones will not be shown and the

  	  basic ones needed by most people will default to 'M'.
  
  	  If unsure, say Y.

  config BRIDGE_NETFILTER

  	tristate "Bridged IP/ARP packets filtering"

  	depends on BRIDGE

  	depends on NETFILTER && INET

  	depends on NETFILTER_ADVANCED

  	select NETFILTER_FAMILY_BRIDGE

  	select SKB_EXTENSIONS

  	help

  	  Enabling this option will let arptables resp. iptables see bridged
  	  ARP resp. IP traffic. If you want a bridging firewall, you probably
  	  want this option enabled.
  	  Enabling or disabling this option doesn't enable or disable
  	  ebtables.
  
  	  If unsure, say N.

  source "net/netfilter/Kconfig"

  source "net/ipv4/netfilter/Kconfig"
  source "net/ipv6/netfilter/Kconfig"
  source "net/decnet/netfilter/Kconfig"
  source "net/bridge/netfilter/Kconfig"
  
  endif

  source "net/bpfilter/Kconfig"

  source "net/dccp/Kconfig"

  source "net/sctp/Kconfig"

  source "net/rds/Kconfig"

  source "net/tipc/Kconfig"

  source "net/atm/Kconfig"

  source "net/l2tp/Kconfig"

  source "net/802/Kconfig"

  source "net/bridge/Kconfig"

  source "net/dsa/Kconfig"

  source "net/8021q/Kconfig"

  source "net/decnet/Kconfig"

  source "net/llc/Kconfig"

  source "drivers/net/appletalk/Kconfig"

  source "net/x25/Kconfig"
  source "net/lapb/Kconfig"

  source "net/phonet/Kconfig"

  source "net/6lowpan/Kconfig"

  source "net/ieee802154/Kconfig"

  source "net/mac802154/Kconfig"

  source "net/sched/Kconfig"

  source "net/dcb/Kconfig"

  source "net/tsn/Kconfig"

  source "net/dns_resolver/Kconfig"

  source "net/batman-adv/Kconfig"

  source "net/openvswitch/Kconfig"

  source "net/vmw_vsock/Kconfig"

  source "net/netlink/Kconfig"

  source "net/mpls/Kconfig"

  source "net/nsh/Kconfig"

  source "net/hsr/Kconfig"

  source "net/switchdev/Kconfig"

  source "net/l3mdev/Kconfig"

  source "net/qrtr/Kconfig"

  source "net/ncsi/Kconfig"

  config RPS

  	bool

  	depends on SMP && SYSFS

  	default y

  config RFS_ACCEL

  	bool

  	depends on RPS

  	select CPU_RMAP
  	default y

  config XPS

  	bool

  	depends on SMP

  	default y

  config HWBM

  	bool

  config CGROUP_NET_PRIO

  	bool "Network priority cgroup"

  	depends on CGROUPS

  	select SOCK_CGROUP_DATA

  	help

  	  Cgroup subsystem for use in assigning processes to network priorities on

  	  a per-interface basis.

  config CGROUP_NET_CLASSID

  	bool "Network classid cgroup"

  	depends on CGROUPS

  	select SOCK_CGROUP_DATA

  	help

  	  Cgroup subsystem for use as general purpose socket classid marker that is
  	  being used in cls_cgroup and for netfilter matching.

  config NET_RX_BUSY_POLL

  	bool

  	default y

  config BQL

  	bool

  	depends on SYSFS
  	select DQL
  	default y

  config BPF_JIT
  	bool "enable BPF Just In Time compiler"

  	depends on HAVE_CBPF_JIT || HAVE_EBPF_JIT

  	depends on MODULES

  	help

  	  Berkeley Packet Filter filtering capabilities are normally handled
  	  by an interpreter. This option allows kernel to generate a native
  	  code when filter is loaded in memory. This should speedup

  	  packet sniffing (libpcap/tcpdump).
  
  	  Note, admin should enable this feature changing:
  	  /proc/sys/net/core/bpf_jit_enable

  	  /proc/sys/net/core/bpf_jit_harden   (optional)
  	  /proc/sys/net/core/bpf_jit_kallsyms (optional)

  config BPF_STREAM_PARSER
  	bool "enable BPF STREAM_PARSER"

  	depends on INET

  	depends on BPF_SYSCALL

  	depends on CGROUP_BPF

  	select STREAM_PARSER

  	select NET_SOCK_MSG

  	help

  	  Enabling this allows a stream parser to be used with
  	  BPF_MAP_TYPE_SOCKMAP.

  	  BPF_MAP_TYPE_SOCKMAP provides a map type to use with network sockets.
  	  It can be used to enforce socket policy, implement socket redirects,
  	  etc.

  config NET_FLOW_LIMIT

  	bool

  	depends on RPS
  	default y

  	help

  	  The network stack has to drop packets when a receive processing CPU's
  	  backlog reaches netdev_max_backlog. If a few out of many active flows
  	  generate the vast majority of load, drop their traffic earlier to
  	  maintain capacity for the other flows. This feature provides servers
  	  with many clients some protection against DoS by a single (spoofed)
  	  flow that greatly exceeds average workload.

  menu "Network testing"
  
  config NET_PKTGEN
  	tristate "Packet Generator (USE WITH CAUTION)"

  	depends on INET && PROC_FS

  	help

  	  This module will inject preconfigured packets, at a configurable
  	  rate, out of a given interface.  It is used for network interface
  	  stress testing and performance analysis.  If you don't understand
  	  what was just said, you don't need it: say N.
  
  	  Documentation on how to use the packet generator can be found

  	  at <file:Documentation/networking/pktgen.rst>.

  
  	  To compile this code as a module, choose M here: the
  	  module will be called pktgen.

  config NET_DROP_MONITOR

  	tristate "Network packet drop alerting service"

  	depends on INET && TRACEPOINTS

  	help

  	  This feature provides an alerting service to userspace in the
  	  event that packets are discarded in the network stack.  Alerts
  	  are broadcast via netlink socket to any listening user space
  	  process.  If you don't need network drop alerts, or if you are ok
  	  just checking the various proc files and other utilities for
  	  drop statistics, say N here.

  endmenu
  
  endmenu

  source "net/ax25/Kconfig"

  source "net/can/Kconfig"

  source "net/bluetooth/Kconfig"

  source "net/rxrpc/Kconfig"

  source "net/kcm/Kconfig"

  source "net/strparser/Kconfig"

  config FIB_RULES
  	bool

  menuconfig WIRELESS
  	bool "Wireless"

  	depends on !S390

  	default y
  
  if WIRELESS

  
  source "net/wireless/Kconfig"

  source "net/mac80211/Kconfig"

  endif # WIRELESS

  source "net/wimax/Kconfig"

  source "net/rfkill/Kconfig"

  source "net/9p/Kconfig"

  source "net/caif/Kconfig"

  source "net/ceph/Kconfig"

  source "net/nfc/Kconfig"

  source "net/psample/Kconfig"

  source "net/ife/Kconfig"

  config LWTUNNEL
  	bool "Network light weight tunnels"

  	help

  	  This feature provides an infrastructure to support light weight
  	  tunnels like mpls. There is no netdevice associated with a light
  	  weight tunnel endpoint. Tunnel encapsulation parameters are stored
  	  with light weight tunnel state associated with fib routes.

  config LWTUNNEL_BPF
  	bool "Execute BPF program as route nexthop action"

  	depends on LWTUNNEL && INET

  	default y if LWTUNNEL=y

  	help

  	  Allows to run BPF programs as a nexthop action following a route
  	  lookup for incoming and outgoing packets.

  config DST_CACHE

  	bool

  	default n

  config GRO_CELLS
  	bool
  	default n

  config SOCK_VALIDATE_XMIT
  	bool

  config NET_SOCK_MSG
  	bool
  	default n
  	help
  	  The NET_SOCK_MSG provides a framework for plain sockets (e.g. TCP) or
  	  ULPs (upper layer modules, e.g. TLS) to process L7 application data
  	  with the help of BPF programs.

  config NET_DEVLINK

  	bool
  	default n

  config PAGE_POOL

  	bool

  config FAILOVER
  	tristate "Generic failover module"
  	help
  	  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 change/name change events
  	  on slave pci ethernet devices with the same mac address as the
  	  failover netdev. This enables paravirtual drivers to use a
  	  VF as an accelerated low latency datapath. It also allows live
  	  migration of VMs with direct attached VFs by failing over to the
  	  paravirtual datapath when the VF is unplugged.

  config ETHTOOL_NETLINK
  	bool "Netlink interface for ethtool"
  	default y
  	help
  	  An alternative userspace interface for ethtool based on generic
  	  netlink. It provides better extensibility and some new features,
  	  e.g. notification messages.

  endif   # if NET

  # Used by archs to tell that they support BPF JIT compiler plus which flavour.
  # Only one of the two can be selected for a specific arch since eBPF JIT supersedes
  # the cBPF JIT.
  
  # Classic BPF JIT (cBPF)
  config HAVE_CBPF_JIT
  	bool
  
  # Extended BPF JIT (eBPF)
  config HAVE_EBPF_JIT

  	bool