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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
Daniel Borkmann408eccc2014-04-01 16:20:23 +020092config NET_PTP_CLASSIFY
93 def_bool n
94
Richard Cochranc1f19b52010-07-17 08:49:36 +000095config NETWORK_PHY_TIMESTAMPING
96 bool "Timestamping in PHY devices"
Daniel Borkmann408eccc2014-04-01 16:20:23 +020097 select NET_PTP_CLASSIFY
Richard Cochranc1f19b52010-07-17 08:49:36 +000098 help
99 This allows timestamping of network packets by PHYs with
100 hardware timestamping capabilities. This option adds some
101 overhead in the transmit and receive paths.
102
103 If you are unsure how to answer this question, answer N.
104
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105menuconfig NETFILTER
Pablo Neira Ayusoef91fd52006-11-29 02:35:43 +0100106 bool "Network packet filtering framework (Netfilter)"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107 ---help---
108 Netfilter is a framework for filtering and mangling network packets
109 that pass through your Linux box.
110
111 The most common use of packet filtering is to run your Linux box as
112 a firewall protecting a local network from the Internet. The type of
113 firewall provided by this kernel support is called a "packet
114 filter", which means that it can reject individual network packets
115 based on type, source, destination etc. The other kind of firewall,
116 a "proxy-based" one, is more secure but more intrusive and more
117 bothersome to set up; it inspects the network traffic much more
118 closely, modifies it and has knowledge about the higher level
119 protocols, which a packet filter lacks. Moreover, proxy-based
120 firewalls often require changes to the programs running on the local
121 clients. Proxy-based firewalls don't need support by the kernel, but
122 they are often combined with a packet filter, which only works if
123 you say Y here.
124
125 You should also say Y here if you intend to use your Linux box as
126 the gateway to the Internet for a local network of machines without
127 globally valid IP addresses. This is called "masquerading": if one
128 of the computers on your local network wants to send something to
129 the outside, your box can "masquerade" as that computer, i.e. it
130 forwards the traffic to the intended outside destination, but
131 modifies the packets to make it look like they came from the
132 firewall box itself. It works both ways: if the outside host
133 replies, the Linux box will silently forward the traffic to the
134 correct local computer. This way, the computers on your local net
135 are completely invisible to the outside world, even though they can
136 reach the outside and can receive replies. It is even possible to
137 run globally visible servers from within a masqueraded local network
138 using a mechanism called portforwarding. Masquerading is also often
139 called NAT (Network Address Translation).
140
141 Another use of Netfilter is in transparent proxying: if a machine on
142 the local network tries to connect to an outside host, your Linux
143 box can transparently forward the traffic to a local server,
144 typically a caching proxy server.
145
146 Yet another use of Netfilter is building a bridging firewall. Using
147 a bridge with Network packet filtering enabled makes iptables "see"
148 the bridged traffic. For filtering on the lower network and Ethernet
149 protocols over the bridge, use ebtables (under bridge netfilter
150 configuration).
151
152 Various modules exist for netfilter which replace the previous
153 masquerading (ipmasqadm), packet filtering (ipchains), transparent
154 proxying, and portforwarding mechanisms. Please see
155 <file:Documentation/Changes> under "iptables" for the location of
156 these packages.
157
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158if NETFILTER
159
160config NETFILTER_DEBUG
161 bool "Network packet filtering debugging"
162 depends on NETFILTER
163 help
164 You can say Y here if you want to get additional messages useful in
165 debugging the netfilter code.
166
Patrick McHardy33b8e772007-12-17 22:47:05 -0800167config NETFILTER_ADVANCED
168 bool "Advanced netfilter configuration"
169 depends on NETFILTER
170 default y
171 help
172 If you say Y here you can select between all the netfilter modules.
Matt LaPlante692105b2009-01-26 11:12:25 +0100173 If you say N the more unusual ones will not be shown and the
Patrick McHardy33b8e772007-12-17 22:47:05 -0800174 basic ones needed by most people will default to 'M'.
175
176 If unsure, say Y.
177
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178config BRIDGE_NETFILTER
Pablo Neira Ayuso34666d42014-09-18 11:29:03 +0200179 tristate "Bridged IP/ARP packets filtering"
Florian Westphal57f58772014-09-30 10:59:18 +0200180 depends on BRIDGE
Pablo Neira Ayuso34666d42014-09-18 11:29:03 +0200181 depends on NETFILTER && INET
Patrick McHardy33b8e772007-12-17 22:47:05 -0800182 depends on NETFILTER_ADVANCED
Pablo Neira Ayuso34666d42014-09-18 11:29:03 +0200183 default m
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184 ---help---
185 Enabling this option will let arptables resp. iptables see bridged
186 ARP resp. IP traffic. If you want a bridging firewall, you probably
187 want this option enabled.
188 Enabling or disabling this option doesn't enable or disable
189 ebtables.
190
191 If unsure, say N.
192
Harald Welte9eb0eec2005-09-17 00:41:21 -0700193source "net/netfilter/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194source "net/ipv4/netfilter/Kconfig"
195source "net/ipv6/netfilter/Kconfig"
196source "net/decnet/netfilter/Kconfig"
197source "net/bridge/netfilter/Kconfig"
198
199endif
200
Arnaldo Carvalho de Melo7c657872005-08-09 20:14:34 -0700201source "net/dccp/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700202source "net/sctp/Kconfig"
Andy Groverfe17f842009-02-24 15:30:39 +0000203source "net/rds/Kconfig"
Per Liden1e63e682006-01-16 16:39:13 +0100204source "net/tipc/Kconfig"
Sam Ravnborg6a2e9b72005-07-11 21:13:56 -0700205source "net/atm/Kconfig"
James Chapmanfd558d12010-04-02 06:18:33 +0000206source "net/l2tp/Kconfig"
Patrick McHardya19800d2008-07-05 21:25:39 -0700207source "net/802/Kconfig"
Sam Ravnborg6a2e9b72005-07-11 21:13:56 -0700208source "net/bridge/Kconfig"
Lennert Buytenhek91da11f2008-10-07 13:44:02 +0000209source "net/dsa/Kconfig"
Sam Ravnborg6a2e9b72005-07-11 21:13:56 -0700210source "net/8021q/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211source "net/decnet/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212source "net/llc/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213source "net/ipx/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214source "drivers/net/appletalk/Kconfig"
Sam Ravnborg6a2e9b72005-07-11 21:13:56 -0700215source "net/x25/Kconfig"
216source "net/lapb/Kconfig"
remi.denis-courmont@nokia50751382009-01-23 03:00:25 +0000217source "net/phonet/Kconfig"
Alexander Aring2c6bed72014-07-11 10:24:18 +0200218source "net/6lowpan/Kconfig"
Sergey Lapin9ec76712009-06-08 12:18:48 +0000219source "net/ieee802154/Kconfig"
alex.bluesman.smirnov@gmail.com1010f542012-05-15 20:50:20 +0000220source "net/mac802154/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700221source "net/sched/Kconfig"
Alexander Duyck2f90b862008-11-20 20:52:10 -0800222source "net/dcb/Kconfig"
Wang Lei1a4240f2010-08-04 15:16:33 +0100223source "net/dns_resolver/Kconfig"
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000224source "net/batman-adv/Kconfig"
Jesse Grossccb13522011-10-25 19:26:31 -0700225source "net/openvswitch/Kconfig"
Andy Kingd021c342013-02-06 14:23:56 +0000226source "net/vmw_vsock/Kconfig"
Andrey Vagineaaa3132013-03-21 20:33:48 +0400227source "net/netlink/Kconfig"
Simon Horman0d89d202013-05-23 21:02:52 +0000228source "net/mpls/Kconfig"
Arvid Brodinf4214362013-10-30 21:10:47 +0100229source "net/hsr/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230
Eric Dumazetdf334542010-03-24 19:13:54 +0000231config RPS
232 boolean
Yuanhan Liu044c8d42013-11-21 14:32:01 -0800233 depends on SMP && SYSFS
Eric Dumazetdf334542010-03-24 19:13:54 +0000234 default y
235
Ben Hutchingsc4454772011-01-19 11:03:53 +0000236config RFS_ACCEL
237 boolean
Martin Schwidefsky0244ad02013-08-30 09:39:53 +0200238 depends on RPS
Ben Hutchingsc4454772011-01-19 11:03:53 +0000239 select CPU_RMAP
240 default y
241
Tom Herbertbf264142010-11-26 08:36:09 +0000242config XPS
243 boolean
Yuanhan Liu044c8d42013-11-21 14:32:01 -0800244 depends on SMP
Tom Herbertbf264142010-11-26 08:36:09 +0000245 default y
246
Daniel Borkmann86f85152013-12-29 17:27:11 +0100247config CGROUP_NET_PRIO
Tejun Heoaf636332014-02-08 10:36:58 -0500248 bool "Network priority cgroup"
Neil Horman5bc14212011-11-22 05:10:51 +0000249 depends on CGROUPS
250 ---help---
251 Cgroup subsystem for use in assigning processes to network priorities on
Daniel Borkmann86f85152013-12-29 17:27:11 +0100252 a per-interface basis.
Neil Horman5bc14212011-11-22 05:10:51 +0000253
Daniel Borkmannfe1217c2013-12-29 18:27:10 +0100254config CGROUP_NET_CLASSID
255 boolean "Network classid cgroup"
256 depends on CGROUPS
257 ---help---
258 Cgroup subsystem for use as general purpose socket classid marker that is
259 being used in cls_cgroup and for netfilter matching.
260
Cong Wange0d10952013-08-01 11:10:25 +0800261config NET_RX_BUSY_POLL
Eliezer Tamir89bf1b52013-06-14 16:33:46 +0300262 boolean
263 default y
Eliezer Tamir06021292013-06-10 11:39:50 +0300264
Tom Herbert114cf582011-11-28 16:33:09 +0000265config BQL
266 boolean
267 depends on SYSFS
268 select DQL
269 default y
270
Eric Dumazet0a148422011-04-20 09:27:32 +0000271config BPF_JIT
272 bool "enable BPF Just In Time compiler"
273 depends on HAVE_BPF_JIT
Eric Dumazetb6202f92011-04-29 10:20:53 -0700274 depends on MODULES
Eric Dumazet0a148422011-04-20 09:27:32 +0000275 ---help---
276 Berkeley Packet Filter filtering capabilities are normally handled
277 by an interpreter. This option allows kernel to generate a native
278 code when filter is loaded in memory. This should speedup
279 packet sniffing (libpcap/tcpdump). Note : Admin should enable
280 this feature changing /proc/sys/net/core/bpf_jit_enable
281
Willem de Bruijn99bbc702013-05-20 04:02:32 +0000282config NET_FLOW_LIMIT
283 boolean
284 depends on RPS
285 default y
286 ---help---
287 The network stack has to drop packets when a receive processing CPU's
288 backlog reaches netdev_max_backlog. If a few out of many active flows
289 generate the vast majority of load, drop their traffic earlier to
290 maintain capacity for the other flows. This feature provides servers
291 with many clients some protection against DoS by a single (spoofed)
292 flow that greatly exceeds average workload.
293
Linus Torvalds1da177e2005-04-16 15:20:36 -0700294menu "Network testing"
295
296config NET_PKTGEN
297 tristate "Packet Generator (USE WITH CAUTION)"
Thomas Grafffd756b2013-07-29 13:44:15 +0200298 depends on INET && PROC_FS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299 ---help---
300 This module will inject preconfigured packets, at a configurable
301 rate, out of a given interface. It is used for network interface
302 stress testing and performance analysis. If you don't understand
303 what was just said, you don't need it: say N.
304
305 Documentation on how to use the packet generator can be found
306 at <file:Documentation/networking/pktgen.txt>.
307
308 To compile this code as a module, choose M here: the
309 module will be called pktgen.
310
Stephen Hemmingera42e9d62006-06-05 17:30:32 -0700311config NET_TCPPROBE
312 tristate "TCP connection probing"
Kees Cook911f8632012-10-02 11:19:40 -0700313 depends on INET && PROC_FS && KPROBES
Stephen Hemmingera42e9d62006-06-05 17:30:32 -0700314 ---help---
315 This module allows for capturing the changes to TCP connection
Dave Jones9dadaa192006-06-08 23:42:09 -0700316 state in response to incoming packets. It is used for debugging
Stephen Hemmingera42e9d62006-06-05 17:30:32 -0700317 TCP congestion avoidance modules. If you don't understand
318 what was just said, you don't need it: say N.
319
Grant Grundler82fe7c92006-09-25 23:47:14 -0700320 Documentation on how to use TCP connection probing can be found
Michael Wittenc996d8b2010-11-15 19:55:34 +0000321 at:
322
323 http://www.linuxfoundation.org/collaborate/workgroups/networking/tcpprobe
Stephen Hemmingera42e9d62006-06-05 17:30:32 -0700324
325 To compile this code as a module, choose M here: the
326 module will be called tcp_probe.
327
Neil Horman273ae442009-03-11 09:53:16 +0000328config NET_DROP_MONITOR
Neil Hormancad456d2012-05-17 10:04:00 +0000329 tristate "Network packet drop alerting service"
Kees Cook911f8632012-10-02 11:19:40 -0700330 depends on INET && TRACEPOINTS
Neil Horman273ae442009-03-11 09:53:16 +0000331 ---help---
332 This feature provides an alerting service to userspace in the
333 event that packets are discarded in the network stack. Alerts
334 are broadcast via netlink socket to any listening user space
335 process. If you don't need network drop alerts, or if you are ok
336 just checking the various proc files and other utilities for
337 drop statistics, say N here.
338
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339endmenu
340
341endmenu
342
Linus Torvalds1da177e2005-04-16 15:20:36 -0700343source "net/ax25/Kconfig"
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800344source "net/can/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700345source "net/irda/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346source "net/bluetooth/Kconfig"
David Howells17926a72007-04-26 15:48:28 -0700347source "net/rxrpc/Kconfig"
Adrian Bunkd86b5e02006-01-21 00:46:55 +0100348
Thomas Graf14c0b972006-08-04 03:38:38 -0700349config FIB_RULES
350 bool
351
Robert P. J. Day54420602008-07-24 12:20:09 -0400352menuconfig WIRELESS
353 bool "Wireless"
Martin Schwidefskyf54bfc02007-05-10 15:46:01 +0200354 depends on !S390
Robert P. J. Day54420602008-07-24 12:20:09 -0400355 default y
356
357if WIRELESS
Johannes Berg2a5e1c02007-04-23 12:19:12 -0700358
359source "net/wireless/Kconfig"
Jiri Bencf0706e82007-05-05 11:45:53 -0700360source "net/mac80211/Kconfig"
Johannes Berg2a5e1c02007-04-23 12:19:12 -0700361
Robert P. J. Day54420602008-07-24 12:20:09 -0400362endif # WIRELESS
Johannes Berg2a5e1c02007-04-23 12:19:12 -0700363
Inaky Perez-Gonzalezb0c83ae2008-12-23 16:18:24 -0800364source "net/wimax/Kconfig"
365
Ivo van Doorncf4328c2007-05-07 00:34:20 -0700366source "net/rfkill/Kconfig"
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -0500367source "net/9p/Kconfig"
Sjur Braendeland3908c692010-03-30 13:56:28 +0000368source "net/caif/Kconfig"
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700369source "net/ceph/Kconfig"
Lauro Ramos Venancio3e256b82011-07-01 19:31:33 -0300370source "net/nfc/Kconfig"
Sjur Braendeland3908c692010-03-30 13:56:28 +0000371
Ivo van Doorncf4328c2007-05-07 00:34:20 -0700372
Sam Ravnborg6a2e9b72005-07-11 21:13:56 -0700373endif # if NET
Sam Ravnborge47b65b2012-05-21 20:45:37 +0200374
375# Used by archs to tell that they support BPF_JIT
376config HAVE_BPF_JIT
377 bool