blob: 44dd5786ee91da16ae920d3c9f62b1f4bac353c8 [file] [log] [blame]
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
Alexei Starovoitovf89b7752014-10-23 18:41:08 -07009 select BPF
Linus Torvalds1da177e2005-04-16 15:20:36 -070010 ---help---
11 Unless you really know what you are doing, you should say Y here.
12 The reason is that some programs need kernel networking support even
13 when running on a stand-alone machine that isn't connected to any
Sam Ravnborgd5950b42005-07-11 21:03:49 -070014 other computer.
15
16 If you are upgrading from an older kernel, you
Linus Torvalds1da177e2005-04-16 15:20:36 -070017 should consider updating your networking tools too because changes
18 in the kernel and the tools often go hand in hand. The tools are
19 contained in the package net-tools, the location and version number
20 of which are given in <file:Documentation/Changes>.
21
22 For a general introduction to Linux networking, it is highly
23 recommended to read the NET-HOWTO, available from
24 <http://www.tldp.org/docs.html#howto>.
25
Sam Ravnborg6a2e9b72005-07-11 21:13:56 -070026if NET
27
Johannes Berg1dacc762009-07-01 11:26:02 +000028config WANT_COMPAT_NETLINK_MESSAGES
29 bool
30 help
31 This option can be selected by other options that need compat
32 netlink messages.
33
34config COMPAT_NETLINK_MESSAGES
35 def_bool y
36 depends on COMPAT
David S. Miller40b53d82010-07-26 13:13:49 -070037 depends on WEXT_CORE || WANT_COMPAT_NETLINK_MESSAGES
Johannes Berg1dacc762009-07-01 11:26:02 +000038 help
39 This option makes it possible to send different netlink messages
40 to tasks depending on whether the task is a compat task or not. To
41 achieve this, you need to set skb_shinfo(skb)->frag_list to the
42 compat skb before sending the skb, the netlink code will sort out
43 which message to actually pass to the task.
44
45 Newly written code should NEVER need this option but do
46 compat-independent messages instead!
47
Linus Torvalds1da177e2005-04-16 15:20:36 -070048menu "Networking options"
Linus Torvalds1da177e2005-04-16 15:20:36 -070049
Sam Ravnborg6a2e9b72005-07-11 21:13:56 -070050source "net/packet/Kconfig"
51source "net/unix/Kconfig"
52source "net/xfrm/Kconfig"
Martin Schwidefsky2356f4c2007-02-08 13:37:42 -080053source "net/iucv/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -070054
55config INET
56 bool "TCP/IP networking"
David S. Miller798b2cb2012-09-04 14:20:14 -040057 select CRYPTO
58 select CRYPTO_AES
Linus Torvalds1da177e2005-04-16 15:20:36 -070059 ---help---
60 These are the protocols used on the Internet and on most local
61 Ethernets. It is highly recommended to say Y here (this will enlarge
YOSHIFUJI Hideakicf80efc2008-02-12 17:35:16 +090062 your kernel by about 400 KB), since some programs (e.g. the X window
Linus Torvalds1da177e2005-04-16 15:20:36 -070063 system) use TCP/IP even if your machine is not connected to any
64 other computer. You will get the so-called loopback device which
65 allows you to ping yourself (great fun, that!).
66
67 For an excellent introduction to Linux networking, please read the
68 Linux Networking HOWTO, available from
69 <http://www.tldp.org/docs.html#howto>.
70
71 If you say Y here and also to "/proc file system support" and
72 "Sysctl support" below, you can change various aspects of the
73 behavior of the TCP/IP code by writing to the (virtual) files in
74 /proc/sys/net/ipv4/*; the options are explained in the file
75 <file:Documentation/networking/ip-sysctl.txt>.
76
77 Short answer: say Y.
78
Sam Ravnborg6a2e9b72005-07-11 21:13:56 -070079if INET
Linus Torvalds1da177e2005-04-16 15:20:36 -070080source "net/ipv4/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -070081source "net/ipv6/Kconfig"
Paul Moore38c94372006-11-05 16:44:06 -080082source "net/netlabel/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -070083
Sam Ravnborg6a2e9b72005-07-11 21:13:56 -070084endif # if INET
85
James Morris984bc162006-06-09 00:29:17 -070086config NETWORK_SECMARK
87 bool "Security Marking"
88 help
89 This enables security marking of network packets, similar
90 to nfmark, but designated for security purposes.
91 If you are unsure how to answer this question, answer N.
92
Daniel Borkmann408eccc2014-04-01 16:20:23 +020093config NET_PTP_CLASSIFY
94 def_bool n
95
Richard Cochranc1f19b52010-07-17 08:49:36 +000096config NETWORK_PHY_TIMESTAMPING
97 bool "Timestamping in PHY devices"
Daniel Borkmann408eccc2014-04-01 16:20:23 +020098 select NET_PTP_CLASSIFY
Richard Cochranc1f19b52010-07-17 08:49:36 +000099 help
100 This allows timestamping of network packets by PHYs with
101 hardware timestamping capabilities. This option adds some
102 overhead in the transmit and receive paths.
103
104 If you are unsure how to answer this question, answer N.
105
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106menuconfig NETFILTER
Pablo Neira Ayusoef91fd52006-11-29 02:35:43 +0100107 bool "Network packet filtering framework (Netfilter)"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108 ---help---
109 Netfilter is a framework for filtering and mangling network packets
110 that pass through your Linux box.
111
112 The most common use of packet filtering is to run your Linux box as
113 a firewall protecting a local network from the Internet. The type of
114 firewall provided by this kernel support is called a "packet
115 filter", which means that it can reject individual network packets
116 based on type, source, destination etc. The other kind of firewall,
117 a "proxy-based" one, is more secure but more intrusive and more
118 bothersome to set up; it inspects the network traffic much more
119 closely, modifies it and has knowledge about the higher level
120 protocols, which a packet filter lacks. Moreover, proxy-based
121 firewalls often require changes to the programs running on the local
122 clients. Proxy-based firewalls don't need support by the kernel, but
123 they are often combined with a packet filter, which only works if
124 you say Y here.
125
126 You should also say Y here if you intend to use your Linux box as
127 the gateway to the Internet for a local network of machines without
128 globally valid IP addresses. This is called "masquerading": if one
129 of the computers on your local network wants to send something to
130 the outside, your box can "masquerade" as that computer, i.e. it
131 forwards the traffic to the intended outside destination, but
132 modifies the packets to make it look like they came from the
133 firewall box itself. It works both ways: if the outside host
134 replies, the Linux box will silently forward the traffic to the
135 correct local computer. This way, the computers on your local net
136 are completely invisible to the outside world, even though they can
137 reach the outside and can receive replies. It is even possible to
138 run globally visible servers from within a masqueraded local network
139 using a mechanism called portforwarding. Masquerading is also often
140 called NAT (Network Address Translation).
141
142 Another use of Netfilter is in transparent proxying: if a machine on
143 the local network tries to connect to an outside host, your Linux
144 box can transparently forward the traffic to a local server,
145 typically a caching proxy server.
146
147 Yet another use of Netfilter is building a bridging firewall. Using
148 a bridge with Network packet filtering enabled makes iptables "see"
149 the bridged traffic. For filtering on the lower network and Ethernet
150 protocols over the bridge, use ebtables (under bridge netfilter
151 configuration).
152
153 Various modules exist for netfilter which replace the previous
154 masquerading (ipmasqadm), packet filtering (ipchains), transparent
155 proxying, and portforwarding mechanisms. Please see
156 <file:Documentation/Changes> under "iptables" for the location of
157 these packages.
158
Linus Torvalds1da177e2005-04-16 15:20:36 -0700159if NETFILTER
160
161config NETFILTER_DEBUG
162 bool "Network packet filtering debugging"
163 depends on NETFILTER
164 help
165 You can say Y here if you want to get additional messages useful in
166 debugging the netfilter code.
167
Patrick McHardy33b8e772007-12-17 22:47:05 -0800168config NETFILTER_ADVANCED
169 bool "Advanced netfilter configuration"
170 depends on NETFILTER
171 default y
172 help
173 If you say Y here you can select between all the netfilter modules.
Matt LaPlante692105b2009-01-26 11:12:25 +0100174 If you say N the more unusual ones will not be shown and the
Patrick McHardy33b8e772007-12-17 22:47:05 -0800175 basic ones needed by most people will default to 'M'.
176
177 If unsure, say Y.
178
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179config BRIDGE_NETFILTER
Pablo Neira Ayuso34666d42014-09-18 11:29:03 +0200180 tristate "Bridged IP/ARP packets filtering"
Florian Westphal57f58772014-09-30 10:59:18 +0200181 depends on BRIDGE
Pablo Neira Ayuso34666d42014-09-18 11:29:03 +0200182 depends on NETFILTER && INET
Patrick McHardy33b8e772007-12-17 22:47:05 -0800183 depends on NETFILTER_ADVANCED
Pablo Neira Ayuso34666d42014-09-18 11:29:03 +0200184 default m
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185 ---help---
186 Enabling this option will let arptables resp. iptables see bridged
187 ARP resp. IP traffic. If you want a bridging firewall, you probably
188 want this option enabled.
189 Enabling or disabling this option doesn't enable or disable
190 ebtables.
191
192 If unsure, say N.
193
Harald Welte9eb0eec2005-09-17 00:41:21 -0700194source "net/netfilter/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195source "net/ipv4/netfilter/Kconfig"
196source "net/ipv6/netfilter/Kconfig"
197source "net/decnet/netfilter/Kconfig"
198source "net/bridge/netfilter/Kconfig"
199
200endif
201
Arnaldo Carvalho de Melo7c657872005-08-09 20:14:34 -0700202source "net/dccp/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203source "net/sctp/Kconfig"
Andy Groverfe17f842009-02-24 15:30:39 +0000204source "net/rds/Kconfig"
Per Liden1e63e682006-01-16 16:39:13 +0100205source "net/tipc/Kconfig"
Sam Ravnborg6a2e9b72005-07-11 21:13:56 -0700206source "net/atm/Kconfig"
James Chapmanfd558d12010-04-02 06:18:33 +0000207source "net/l2tp/Kconfig"
Patrick McHardya19800d2008-07-05 21:25:39 -0700208source "net/802/Kconfig"
Sam Ravnborg6a2e9b72005-07-11 21:13:56 -0700209source "net/bridge/Kconfig"
Lennert Buytenhek91da11f2008-10-07 13:44:02 +0000210source "net/dsa/Kconfig"
Sam Ravnborg6a2e9b72005-07-11 21:13:56 -0700211source "net/8021q/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212source "net/decnet/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213source "net/llc/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214source "net/ipx/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215source "drivers/net/appletalk/Kconfig"
Sam Ravnborg6a2e9b72005-07-11 21:13:56 -0700216source "net/x25/Kconfig"
217source "net/lapb/Kconfig"
remi.denis-courmont@nokia50751382009-01-23 03:00:25 +0000218source "net/phonet/Kconfig"
Alexander Aring2c6bed72014-07-11 10:24:18 +0200219source "net/6lowpan/Kconfig"
Sergey Lapin9ec76712009-06-08 12:18:48 +0000220source "net/ieee802154/Kconfig"
alex.bluesman.smirnov@gmail.com1010f542012-05-15 20:50:20 +0000221source "net/mac802154/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222source "net/sched/Kconfig"
Alexander Duyck2f90b862008-11-20 20:52:10 -0800223source "net/dcb/Kconfig"
Wang Lei1a4240f2010-08-04 15:16:33 +0100224source "net/dns_resolver/Kconfig"
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000225source "net/batman-adv/Kconfig"
Jesse Grossccb13522011-10-25 19:26:31 -0700226source "net/openvswitch/Kconfig"
Andy Kingd021c342013-02-06 14:23:56 +0000227source "net/vmw_vsock/Kconfig"
Andrey Vagineaaa3132013-03-21 20:33:48 +0400228source "net/netlink/Kconfig"
Simon Horman0d89d202013-05-23 21:02:52 +0000229source "net/mpls/Kconfig"
Arvid Brodinf4214362013-10-30 21:10:47 +0100230source "net/hsr/Kconfig"
Jiri Pirko007f7902014-11-28 14:34:17 +0100231source "net/switchdev/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232
Eric Dumazetdf334542010-03-24 19:13:54 +0000233config RPS
Christoph Jaeger6341e622014-12-20 15:41:11 -0500234 bool
Yuanhan Liu044c8d42013-11-21 14:32:01 -0800235 depends on SMP && SYSFS
Eric Dumazetdf334542010-03-24 19:13:54 +0000236 default y
237
Ben Hutchingsc4454772011-01-19 11:03:53 +0000238config RFS_ACCEL
Christoph Jaeger6341e622014-12-20 15:41:11 -0500239 bool
Martin Schwidefsky0244ad02013-08-30 09:39:53 +0200240 depends on RPS
Ben Hutchingsc4454772011-01-19 11:03:53 +0000241 select CPU_RMAP
242 default y
243
Tom Herbertbf264142010-11-26 08:36:09 +0000244config XPS
Christoph Jaeger6341e622014-12-20 15:41:11 -0500245 bool
Yuanhan Liu044c8d42013-11-21 14:32:01 -0800246 depends on SMP
Tom Herbertbf264142010-11-26 08:36:09 +0000247 default y
248
Daniel Borkmann86f85152013-12-29 17:27:11 +0100249config CGROUP_NET_PRIO
Tejun Heoaf636332014-02-08 10:36:58 -0500250 bool "Network priority cgroup"
Neil Horman5bc14212011-11-22 05:10:51 +0000251 depends on CGROUPS
252 ---help---
253 Cgroup subsystem for use in assigning processes to network priorities on
Daniel Borkmann86f85152013-12-29 17:27:11 +0100254 a per-interface basis.
Neil Horman5bc14212011-11-22 05:10:51 +0000255
Daniel Borkmannfe1217c2013-12-29 18:27:10 +0100256config CGROUP_NET_CLASSID
Christoph Jaeger6341e622014-12-20 15:41:11 -0500257 bool "Network classid cgroup"
Daniel Borkmannfe1217c2013-12-29 18:27:10 +0100258 depends on CGROUPS
259 ---help---
260 Cgroup subsystem for use as general purpose socket classid marker that is
261 being used in cls_cgroup and for netfilter matching.
262
Cong Wange0d10952013-08-01 11:10:25 +0800263config NET_RX_BUSY_POLL
Christoph Jaeger6341e622014-12-20 15:41:11 -0500264 bool
Eliezer Tamir89bf1b52013-06-14 16:33:46 +0300265 default y
Eliezer Tamir06021292013-06-10 11:39:50 +0300266
Tom Herbert114cf582011-11-28 16:33:09 +0000267config BQL
Christoph Jaeger6341e622014-12-20 15:41:11 -0500268 bool
Tom Herbert114cf582011-11-28 16:33:09 +0000269 depends on SYSFS
270 select DQL
271 default y
272
Eric Dumazet0a148422011-04-20 09:27:32 +0000273config BPF_JIT
274 bool "enable BPF Just In Time compiler"
275 depends on HAVE_BPF_JIT
Eric Dumazetb6202f92011-04-29 10:20:53 -0700276 depends on MODULES
Eric Dumazet0a148422011-04-20 09:27:32 +0000277 ---help---
278 Berkeley Packet Filter filtering capabilities are normally handled
279 by an interpreter. This option allows kernel to generate a native
280 code when filter is loaded in memory. This should speedup
281 packet sniffing (libpcap/tcpdump). Note : Admin should enable
282 this feature changing /proc/sys/net/core/bpf_jit_enable
283
Willem de Bruijn99bbc702013-05-20 04:02:32 +0000284config NET_FLOW_LIMIT
Christoph Jaeger6341e622014-12-20 15:41:11 -0500285 bool
Willem de Bruijn99bbc702013-05-20 04:02:32 +0000286 depends on RPS
287 default y
288 ---help---
289 The network stack has to drop packets when a receive processing CPU's
290 backlog reaches netdev_max_backlog. If a few out of many active flows
291 generate the vast majority of load, drop their traffic earlier to
292 maintain capacity for the other flows. This feature provides servers
293 with many clients some protection against DoS by a single (spoofed)
294 flow that greatly exceeds average workload.
295
Linus Torvalds1da177e2005-04-16 15:20:36 -0700296menu "Network testing"
297
298config NET_PKTGEN
299 tristate "Packet Generator (USE WITH CAUTION)"
Thomas Grafffd756b2013-07-29 13:44:15 +0200300 depends on INET && PROC_FS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700301 ---help---
302 This module will inject preconfigured packets, at a configurable
303 rate, out of a given interface. It is used for network interface
304 stress testing and performance analysis. If you don't understand
305 what was just said, you don't need it: say N.
306
307 Documentation on how to use the packet generator can be found
308 at <file:Documentation/networking/pktgen.txt>.
309
310 To compile this code as a module, choose M here: the
311 module will be called pktgen.
312
Stephen Hemmingera42e9d62006-06-05 17:30:32 -0700313config NET_TCPPROBE
314 tristate "TCP connection probing"
Kees Cook911f8632012-10-02 11:19:40 -0700315 depends on INET && PROC_FS && KPROBES
Stephen Hemmingera42e9d62006-06-05 17:30:32 -0700316 ---help---
317 This module allows for capturing the changes to TCP connection
Dave Jones9dadaa192006-06-08 23:42:09 -0700318 state in response to incoming packets. It is used for debugging
Stephen Hemmingera42e9d62006-06-05 17:30:32 -0700319 TCP congestion avoidance modules. If you don't understand
320 what was just said, you don't need it: say N.
321
Grant Grundler82fe7c92006-09-25 23:47:14 -0700322 Documentation on how to use TCP connection probing can be found
Michael Wittenc996d8b2010-11-15 19:55:34 +0000323 at:
324
325 http://www.linuxfoundation.org/collaborate/workgroups/networking/tcpprobe
Stephen Hemmingera42e9d62006-06-05 17:30:32 -0700326
327 To compile this code as a module, choose M here: the
328 module will be called tcp_probe.
329
Neil Horman273ae442009-03-11 09:53:16 +0000330config NET_DROP_MONITOR
Neil Hormancad456d2012-05-17 10:04:00 +0000331 tristate "Network packet drop alerting service"
Kees Cook911f8632012-10-02 11:19:40 -0700332 depends on INET && TRACEPOINTS
Neil Horman273ae442009-03-11 09:53:16 +0000333 ---help---
334 This feature provides an alerting service to userspace in the
335 event that packets are discarded in the network stack. Alerts
336 are broadcast via netlink socket to any listening user space
337 process. If you don't need network drop alerts, or if you are ok
338 just checking the various proc files and other utilities for
339 drop statistics, say N here.
340
Linus Torvalds1da177e2005-04-16 15:20:36 -0700341endmenu
342
343endmenu
344
Linus Torvalds1da177e2005-04-16 15:20:36 -0700345source "net/ax25/Kconfig"
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800346source "net/can/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700347source "net/irda/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348source "net/bluetooth/Kconfig"
David Howells17926a72007-04-26 15:48:28 -0700349source "net/rxrpc/Kconfig"
Adrian Bunkd86b5e02006-01-21 00:46:55 +0100350
Thomas Graf14c0b972006-08-04 03:38:38 -0700351config FIB_RULES
352 bool
353
Robert P. J. Day54420602008-07-24 12:20:09 -0400354menuconfig WIRELESS
355 bool "Wireless"
Martin Schwidefskyf54bfc02007-05-10 15:46:01 +0200356 depends on !S390
Robert P. J. Day54420602008-07-24 12:20:09 -0400357 default y
358
359if WIRELESS
Johannes Berg2a5e1c02007-04-23 12:19:12 -0700360
361source "net/wireless/Kconfig"
Jiri Bencf0706e82007-05-05 11:45:53 -0700362source "net/mac80211/Kconfig"
Johannes Berg2a5e1c02007-04-23 12:19:12 -0700363
Robert P. J. Day54420602008-07-24 12:20:09 -0400364endif # WIRELESS
Johannes Berg2a5e1c02007-04-23 12:19:12 -0700365
Inaky Perez-Gonzalezb0c83ae2008-12-23 16:18:24 -0800366source "net/wimax/Kconfig"
367
Ivo van Doorncf4328c2007-05-07 00:34:20 -0700368source "net/rfkill/Kconfig"
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -0500369source "net/9p/Kconfig"
Sjur Braendeland3908c692010-03-30 13:56:28 +0000370source "net/caif/Kconfig"
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700371source "net/ceph/Kconfig"
Lauro Ramos Venancio3e256b82011-07-01 19:31:33 -0300372source "net/nfc/Kconfig"
Sjur Braendeland3908c692010-03-30 13:56:28 +0000373
Ivo van Doorncf4328c2007-05-07 00:34:20 -0700374
Sam Ravnborg6a2e9b72005-07-11 21:13:56 -0700375endif # if NET
Sam Ravnborge47b65b2012-05-21 20:45:37 +0200376
377# Used by archs to tell that they support BPF_JIT
378config HAVE_BPF_JIT
379 bool