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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#
2# Network configuration
3#
4
Robert P. J. Day031cf192008-07-30 03:14:01 -07005menuconfig NET
Linus Torvalds1da177e2005-04-16 15:20:36 -07006 bool "Networking support"
Geert Uytterhoevene9cc8bd2009-03-04 14:53:30 +08007 select NLATTR
Andy Shevchenko4cd57732013-06-04 19:46:26 +03008 select GENERIC_NET_UTILS
Linus Torvalds1da177e2005-04-16 15:20:36 -07009 ---help---
10 Unless you really know what you are doing, you should say Y here.
11 The reason is that some programs need kernel networking support even
12 when running on a stand-alone machine that isn't connected to any
Sam Ravnborgd5950b42005-07-11 21:03:49 -070013 other computer.
14
15 If you are upgrading from an older kernel, you
Linus Torvalds1da177e2005-04-16 15:20:36 -070016 should consider updating your networking tools too because changes
17 in the kernel and the tools often go hand in hand. The tools are
18 contained in the package net-tools, the location and version number
19 of which are given in <file:Documentation/Changes>.
20
21 For a general introduction to Linux networking, it is highly
22 recommended to read the NET-HOWTO, available from
23 <http://www.tldp.org/docs.html#howto>.
24
Sam Ravnborg6a2e9b72005-07-11 21:13:56 -070025if NET
26
Johannes Berg1dacc762009-07-01 11:26:02 +000027config WANT_COMPAT_NETLINK_MESSAGES
28 bool
29 help
30 This option can be selected by other options that need compat
31 netlink messages.
32
33config COMPAT_NETLINK_MESSAGES
34 def_bool y
35 depends on COMPAT
David S. Miller40b53d82010-07-26 13:13:49 -070036 depends on WEXT_CORE || WANT_COMPAT_NETLINK_MESSAGES
Johannes Berg1dacc762009-07-01 11:26:02 +000037 help
38 This option makes it possible to send different netlink messages
39 to tasks depending on whether the task is a compat task or not. To
40 achieve this, you need to set skb_shinfo(skb)->frag_list to the
41 compat skb before sending the skb, the netlink code will sort out
42 which message to actually pass to the task.
43
44 Newly written code should NEVER need this option but do
45 compat-independent messages instead!
46
Linus Torvalds1da177e2005-04-16 15:20:36 -070047menu "Networking options"
Linus Torvalds1da177e2005-04-16 15:20:36 -070048
Sam Ravnborg6a2e9b72005-07-11 21:13:56 -070049source "net/packet/Kconfig"
50source "net/unix/Kconfig"
51source "net/xfrm/Kconfig"
Martin Schwidefsky2356f4c2007-02-08 13:37:42 -080052source "net/iucv/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -070053
54config INET
55 bool "TCP/IP networking"
David S. Miller798b2cb2012-09-04 14:20:14 -040056 select CRYPTO
57 select CRYPTO_AES
Linus Torvalds1da177e2005-04-16 15:20:36 -070058 ---help---
59 These are the protocols used on the Internet and on most local
60 Ethernets. It is highly recommended to say Y here (this will enlarge
YOSHIFUJI Hideakicf80efc2008-02-12 17:35:16 +090061 your kernel by about 400 KB), since some programs (e.g. the X window
Linus Torvalds1da177e2005-04-16 15:20:36 -070062 system) use TCP/IP even if your machine is not connected to any
63 other computer. You will get the so-called loopback device which
64 allows you to ping yourself (great fun, that!).
65
66 For an excellent introduction to Linux networking, please read the
67 Linux Networking HOWTO, available from
68 <http://www.tldp.org/docs.html#howto>.
69
70 If you say Y here and also to "/proc file system support" and
71 "Sysctl support" below, you can change various aspects of the
72 behavior of the TCP/IP code by writing to the (virtual) files in
73 /proc/sys/net/ipv4/*; the options are explained in the file
74 <file:Documentation/networking/ip-sysctl.txt>.
75
76 Short answer: say Y.
77
Sam Ravnborg6a2e9b72005-07-11 21:13:56 -070078if INET
Linus Torvalds1da177e2005-04-16 15:20:36 -070079source "net/ipv4/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -070080source "net/ipv6/Kconfig"
Paul Moore38c94372006-11-05 16:44:06 -080081source "net/netlabel/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -070082
Sam Ravnborg6a2e9b72005-07-11 21:13:56 -070083endif # if INET
84
James Morris984bc162006-06-09 00:29:17 -070085config NETWORK_SECMARK
86 bool "Security Marking"
87 help
88 This enables security marking of network packets, similar
89 to nfmark, but designated for security purposes.
90 If you are unsure how to answer this question, answer N.
91
Richard Cochranc1f19b52010-07-17 08:49:36 +000092config NETWORK_PHY_TIMESTAMPING
93 bool "Timestamping in PHY devices"
Richard Cochranc1f19b52010-07-17 08:49:36 +000094 help
95 This allows timestamping of network packets by PHYs with
96 hardware timestamping capabilities. This option adds some
97 overhead in the transmit and receive paths.
98
99 If you are unsure how to answer this question, answer N.
100
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101menuconfig NETFILTER
Pablo Neira Ayusoef91fd52006-11-29 02:35:43 +0100102 bool "Network packet filtering framework (Netfilter)"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103 ---help---
104 Netfilter is a framework for filtering and mangling network packets
105 that pass through your Linux box.
106
107 The most common use of packet filtering is to run your Linux box as
108 a firewall protecting a local network from the Internet. The type of
109 firewall provided by this kernel support is called a "packet
110 filter", which means that it can reject individual network packets
111 based on type, source, destination etc. The other kind of firewall,
112 a "proxy-based" one, is more secure but more intrusive and more
113 bothersome to set up; it inspects the network traffic much more
114 closely, modifies it and has knowledge about the higher level
115 protocols, which a packet filter lacks. Moreover, proxy-based
116 firewalls often require changes to the programs running on the local
117 clients. Proxy-based firewalls don't need support by the kernel, but
118 they are often combined with a packet filter, which only works if
119 you say Y here.
120
121 You should also say Y here if you intend to use your Linux box as
122 the gateway to the Internet for a local network of machines without
123 globally valid IP addresses. This is called "masquerading": if one
124 of the computers on your local network wants to send something to
125 the outside, your box can "masquerade" as that computer, i.e. it
126 forwards the traffic to the intended outside destination, but
127 modifies the packets to make it look like they came from the
128 firewall box itself. It works both ways: if the outside host
129 replies, the Linux box will silently forward the traffic to the
130 correct local computer. This way, the computers on your local net
131 are completely invisible to the outside world, even though they can
132 reach the outside and can receive replies. It is even possible to
133 run globally visible servers from within a masqueraded local network
134 using a mechanism called portforwarding. Masquerading is also often
135 called NAT (Network Address Translation).
136
137 Another use of Netfilter is in transparent proxying: if a machine on
138 the local network tries to connect to an outside host, your Linux
139 box can transparently forward the traffic to a local server,
140 typically a caching proxy server.
141
142 Yet another use of Netfilter is building a bridging firewall. Using
143 a bridge with Network packet filtering enabled makes iptables "see"
144 the bridged traffic. For filtering on the lower network and Ethernet
145 protocols over the bridge, use ebtables (under bridge netfilter
146 configuration).
147
148 Various modules exist for netfilter which replace the previous
149 masquerading (ipmasqadm), packet filtering (ipchains), transparent
150 proxying, and portforwarding mechanisms. Please see
151 <file:Documentation/Changes> under "iptables" for the location of
152 these packages.
153
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154if NETFILTER
155
156config NETFILTER_DEBUG
157 bool "Network packet filtering debugging"
158 depends on NETFILTER
159 help
160 You can say Y here if you want to get additional messages useful in
161 debugging the netfilter code.
162
Patrick McHardy33b8e772007-12-17 22:47:05 -0800163config NETFILTER_ADVANCED
164 bool "Advanced netfilter configuration"
165 depends on NETFILTER
166 default y
167 help
168 If you say Y here you can select between all the netfilter modules.
Matt LaPlante692105b2009-01-26 11:12:25 +0100169 If you say N the more unusual ones will not be shown and the
Patrick McHardy33b8e772007-12-17 22:47:05 -0800170 basic ones needed by most people will default to 'M'.
171
172 If unsure, say Y.
173
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174config BRIDGE_NETFILTER
175 bool "Bridged IP/ARP packets filtering"
176 depends on BRIDGE && NETFILTER && INET
Patrick McHardy33b8e772007-12-17 22:47:05 -0800177 depends on NETFILTER_ADVANCED
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178 default y
179 ---help---
180 Enabling this option will let arptables resp. iptables see bridged
181 ARP resp. IP traffic. If you want a bridging firewall, you probably
182 want this option enabled.
183 Enabling or disabling this option doesn't enable or disable
184 ebtables.
185
186 If unsure, say N.
187
Harald Welte9eb0eec2005-09-17 00:41:21 -0700188source "net/netfilter/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189source "net/ipv4/netfilter/Kconfig"
190source "net/ipv6/netfilter/Kconfig"
191source "net/decnet/netfilter/Kconfig"
192source "net/bridge/netfilter/Kconfig"
193
194endif
195
Arnaldo Carvalho de Melo7c657872005-08-09 20:14:34 -0700196source "net/dccp/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197source "net/sctp/Kconfig"
Andy Groverfe17f842009-02-24 15:30:39 +0000198source "net/rds/Kconfig"
Per Liden1e63e682006-01-16 16:39:13 +0100199source "net/tipc/Kconfig"
Sam Ravnborg6a2e9b72005-07-11 21:13:56 -0700200source "net/atm/Kconfig"
James Chapmanfd558d12010-04-02 06:18:33 +0000201source "net/l2tp/Kconfig"
Patrick McHardya19800d2008-07-05 21:25:39 -0700202source "net/802/Kconfig"
Sam Ravnborg6a2e9b72005-07-11 21:13:56 -0700203source "net/bridge/Kconfig"
Lennert Buytenhek91da11f2008-10-07 13:44:02 +0000204source "net/dsa/Kconfig"
Sam Ravnborg6a2e9b72005-07-11 21:13:56 -0700205source "net/8021q/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700206source "net/decnet/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700207source "net/llc/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208source "net/ipx/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700209source "drivers/net/appletalk/Kconfig"
Sam Ravnborg6a2e9b72005-07-11 21:13:56 -0700210source "net/x25/Kconfig"
211source "net/lapb/Kconfig"
remi.denis-courmont@nokia50751382009-01-23 03:00:25 +0000212source "net/phonet/Kconfig"
Sergey Lapin9ec76712009-06-08 12:18:48 +0000213source "net/ieee802154/Kconfig"
alex.bluesman.smirnov@gmail.com1010f542012-05-15 20:50:20 +0000214source "net/mac802154/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215source "net/sched/Kconfig"
Alexander Duyck2f90b862008-11-20 20:52:10 -0800216source "net/dcb/Kconfig"
Wang Lei1a4240f2010-08-04 15:16:33 +0100217source "net/dns_resolver/Kconfig"
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000218source "net/batman-adv/Kconfig"
Jesse Grossccb13522011-10-25 19:26:31 -0700219source "net/openvswitch/Kconfig"
Andy Kingd021c342013-02-06 14:23:56 +0000220source "net/vmw_vsock/Kconfig"
Andrey Vagineaaa3132013-03-21 20:33:48 +0400221source "net/netlink/Kconfig"
Simon Horman0d89d202013-05-23 21:02:52 +0000222source "net/mpls/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223
Eric Dumazetdf334542010-03-24 19:13:54 +0000224config RPS
225 boolean
David S. Miller6dcbc122010-09-14 21:41:20 -0700226 depends on SMP && SYSFS && USE_GENERIC_SMP_HELPERS
Eric Dumazetdf334542010-03-24 19:13:54 +0000227 default y
228
Ben Hutchingsc4454772011-01-19 11:03:53 +0000229config RFS_ACCEL
230 boolean
231 depends on RPS && GENERIC_HARDIRQS
232 select CPU_RMAP
233 default y
234
Tom Herbertbf264142010-11-26 08:36:09 +0000235config XPS
236 boolean
Alexander Duyck024e9672013-01-10 08:57:46 +0000237 depends on SMP && USE_GENERIC_SMP_HELPERS
Tom Herbertbf264142010-11-26 08:36:09 +0000238 default y
239
Neil Horman5bc14212011-11-22 05:10:51 +0000240config NETPRIO_CGROUP
241 tristate "Network priority cgroup"
242 depends on CGROUPS
243 ---help---
244 Cgroup subsystem for use in assigning processes to network priorities on
245 a per-interface basis
246
Cong Wange0d10952013-08-01 11:10:25 +0800247config NET_RX_BUSY_POLL
Eliezer Tamir89bf1b52013-06-14 16:33:46 +0300248 boolean
249 default y
Eliezer Tamir06021292013-06-10 11:39:50 +0300250
Tom Herbert114cf582011-11-28 16:33:09 +0000251config BQL
252 boolean
253 depends on SYSFS
254 select DQL
255 default y
256
Eric Dumazet0a148422011-04-20 09:27:32 +0000257config BPF_JIT
258 bool "enable BPF Just In Time compiler"
259 depends on HAVE_BPF_JIT
Eric Dumazetb6202f92011-04-29 10:20:53 -0700260 depends on MODULES
Eric Dumazet0a148422011-04-20 09:27:32 +0000261 ---help---
262 Berkeley Packet Filter filtering capabilities are normally handled
263 by an interpreter. This option allows kernel to generate a native
264 code when filter is loaded in memory. This should speedup
265 packet sniffing (libpcap/tcpdump). Note : Admin should enable
266 this feature changing /proc/sys/net/core/bpf_jit_enable
267
Willem de Bruijn99bbc702013-05-20 04:02:32 +0000268config NET_FLOW_LIMIT
269 boolean
270 depends on RPS
271 default y
272 ---help---
273 The network stack has to drop packets when a receive processing CPU's
274 backlog reaches netdev_max_backlog. If a few out of many active flows
275 generate the vast majority of load, drop their traffic earlier to
276 maintain capacity for the other flows. This feature provides servers
277 with many clients some protection against DoS by a single (spoofed)
278 flow that greatly exceeds average workload.
279
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280menu "Network testing"
281
282config NET_PKTGEN
283 tristate "Packet Generator (USE WITH CAUTION)"
Thomas Grafffd756b2013-07-29 13:44:15 +0200284 depends on INET && PROC_FS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700285 ---help---
286 This module will inject preconfigured packets, at a configurable
287 rate, out of a given interface. It is used for network interface
288 stress testing and performance analysis. If you don't understand
289 what was just said, you don't need it: say N.
290
291 Documentation on how to use the packet generator can be found
292 at <file:Documentation/networking/pktgen.txt>.
293
294 To compile this code as a module, choose M here: the
295 module will be called pktgen.
296
Stephen Hemmingera42e9d62006-06-05 17:30:32 -0700297config NET_TCPPROBE
298 tristate "TCP connection probing"
Kees Cook911f8632012-10-02 11:19:40 -0700299 depends on INET && PROC_FS && KPROBES
Stephen Hemmingera42e9d62006-06-05 17:30:32 -0700300 ---help---
301 This module allows for capturing the changes to TCP connection
Dave Jones9dadaa192006-06-08 23:42:09 -0700302 state in response to incoming packets. It is used for debugging
Stephen Hemmingera42e9d62006-06-05 17:30:32 -0700303 TCP congestion avoidance modules. If you don't understand
304 what was just said, you don't need it: say N.
305
Grant Grundler82fe7c92006-09-25 23:47:14 -0700306 Documentation on how to use TCP connection probing can be found
Michael Wittenc996d8b2010-11-15 19:55:34 +0000307 at:
308
309 http://www.linuxfoundation.org/collaborate/workgroups/networking/tcpprobe
Stephen Hemmingera42e9d62006-06-05 17:30:32 -0700310
311 To compile this code as a module, choose M here: the
312 module will be called tcp_probe.
313
Neil Horman273ae442009-03-11 09:53:16 +0000314config NET_DROP_MONITOR
Neil Hormancad456d2012-05-17 10:04:00 +0000315 tristate "Network packet drop alerting service"
Kees Cook911f8632012-10-02 11:19:40 -0700316 depends on INET && TRACEPOINTS
Neil Horman273ae442009-03-11 09:53:16 +0000317 ---help---
318 This feature provides an alerting service to userspace in the
319 event that packets are discarded in the network stack. Alerts
320 are broadcast via netlink socket to any listening user space
321 process. If you don't need network drop alerts, or if you are ok
322 just checking the various proc files and other utilities for
323 drop statistics, say N here.
324
Linus Torvalds1da177e2005-04-16 15:20:36 -0700325endmenu
326
327endmenu
328
Linus Torvalds1da177e2005-04-16 15:20:36 -0700329source "net/ax25/Kconfig"
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800330source "net/can/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700331source "net/irda/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700332source "net/bluetooth/Kconfig"
David Howells17926a72007-04-26 15:48:28 -0700333source "net/rxrpc/Kconfig"
Adrian Bunkd86b5e02006-01-21 00:46:55 +0100334
Thomas Graf14c0b972006-08-04 03:38:38 -0700335config FIB_RULES
336 bool
337
Robert P. J. Day54420602008-07-24 12:20:09 -0400338menuconfig WIRELESS
339 bool "Wireless"
Martin Schwidefskyf54bfc02007-05-10 15:46:01 +0200340 depends on !S390
Robert P. J. Day54420602008-07-24 12:20:09 -0400341 default y
342
343if WIRELESS
Johannes Berg2a5e1c02007-04-23 12:19:12 -0700344
345source "net/wireless/Kconfig"
Jiri Bencf0706e82007-05-05 11:45:53 -0700346source "net/mac80211/Kconfig"
Johannes Berg2a5e1c02007-04-23 12:19:12 -0700347
Robert P. J. Day54420602008-07-24 12:20:09 -0400348endif # WIRELESS
Johannes Berg2a5e1c02007-04-23 12:19:12 -0700349
Inaky Perez-Gonzalezb0c83ae2008-12-23 16:18:24 -0800350source "net/wimax/Kconfig"
351
Ivo van Doorncf4328c2007-05-07 00:34:20 -0700352source "net/rfkill/Kconfig"
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -0500353source "net/9p/Kconfig"
Sjur Braendeland3908c692010-03-30 13:56:28 +0000354source "net/caif/Kconfig"
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700355source "net/ceph/Kconfig"
Lauro Ramos Venancio3e256b82011-07-01 19:31:33 -0300356source "net/nfc/Kconfig"
Sjur Braendeland3908c692010-03-30 13:56:28 +0000357
Ivo van Doorncf4328c2007-05-07 00:34:20 -0700358
Sam Ravnborg6a2e9b72005-07-11 21:13:56 -0700359endif # if NET
Sam Ravnborge47b65b2012-05-21 20:45:37 +0200360
361# Used by archs to tell that they support BPF_JIT
362config HAVE_BPF_JIT
363 bool