blob: 99815b5454bf4d68fdc36153951e434f7219b4d0 [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"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700231
Eric Dumazetdf334542010-03-24 19:13:54 +0000232config RPS
233 boolean
Yuanhan Liu044c8d42013-11-21 14:32:01 -0800234 depends on SMP && SYSFS
Eric Dumazetdf334542010-03-24 19:13:54 +0000235 default y
236
Ben Hutchingsc4454772011-01-19 11:03:53 +0000237config RFS_ACCEL
238 boolean
Martin Schwidefsky0244ad02013-08-30 09:39:53 +0200239 depends on RPS
Ben Hutchingsc4454772011-01-19 11:03:53 +0000240 select CPU_RMAP
241 default y
242
Tom Herbertbf264142010-11-26 08:36:09 +0000243config XPS
244 boolean
Yuanhan Liu044c8d42013-11-21 14:32:01 -0800245 depends on SMP
Tom Herbertbf264142010-11-26 08:36:09 +0000246 default y
247
Daniel Borkmann86f85152013-12-29 17:27:11 +0100248config CGROUP_NET_PRIO
Tejun Heoaf636332014-02-08 10:36:58 -0500249 bool "Network priority cgroup"
Neil Horman5bc14212011-11-22 05:10:51 +0000250 depends on CGROUPS
251 ---help---
252 Cgroup subsystem for use in assigning processes to network priorities on
Daniel Borkmann86f85152013-12-29 17:27:11 +0100253 a per-interface basis.
Neil Horman5bc14212011-11-22 05:10:51 +0000254
Daniel Borkmannfe1217c2013-12-29 18:27:10 +0100255config CGROUP_NET_CLASSID
256 boolean "Network classid cgroup"
257 depends on CGROUPS
258 ---help---
259 Cgroup subsystem for use as general purpose socket classid marker that is
260 being used in cls_cgroup and for netfilter matching.
261
Cong Wange0d10952013-08-01 11:10:25 +0800262config NET_RX_BUSY_POLL
Eliezer Tamir89bf1b52013-06-14 16:33:46 +0300263 boolean
264 default y
Eliezer Tamir06021292013-06-10 11:39:50 +0300265
Tom Herbert114cf582011-11-28 16:33:09 +0000266config BQL
267 boolean
268 depends on SYSFS
269 select DQL
270 default y
271
Eric Dumazet0a148422011-04-20 09:27:32 +0000272config BPF_JIT
273 bool "enable BPF Just In Time compiler"
274 depends on HAVE_BPF_JIT
Eric Dumazetb6202f92011-04-29 10:20:53 -0700275 depends on MODULES
Eric Dumazet0a148422011-04-20 09:27:32 +0000276 ---help---
277 Berkeley Packet Filter filtering capabilities are normally handled
278 by an interpreter. This option allows kernel to generate a native
279 code when filter is loaded in memory. This should speedup
280 packet sniffing (libpcap/tcpdump). Note : Admin should enable
281 this feature changing /proc/sys/net/core/bpf_jit_enable
282
Willem de Bruijn99bbc702013-05-20 04:02:32 +0000283config NET_FLOW_LIMIT
284 boolean
285 depends on RPS
286 default y
287 ---help---
288 The network stack has to drop packets when a receive processing CPU's
289 backlog reaches netdev_max_backlog. If a few out of many active flows
290 generate the vast majority of load, drop their traffic earlier to
291 maintain capacity for the other flows. This feature provides servers
292 with many clients some protection against DoS by a single (spoofed)
293 flow that greatly exceeds average workload.
294
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295menu "Network testing"
296
297config NET_PKTGEN
298 tristate "Packet Generator (USE WITH CAUTION)"
Thomas Grafffd756b2013-07-29 13:44:15 +0200299 depends on INET && PROC_FS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300 ---help---
301 This module will inject preconfigured packets, at a configurable
302 rate, out of a given interface. It is used for network interface
303 stress testing and performance analysis. If you don't understand
304 what was just said, you don't need it: say N.
305
306 Documentation on how to use the packet generator can be found
307 at <file:Documentation/networking/pktgen.txt>.
308
309 To compile this code as a module, choose M here: the
310 module will be called pktgen.
311
Stephen Hemmingera42e9d62006-06-05 17:30:32 -0700312config NET_TCPPROBE
313 tristate "TCP connection probing"
Kees Cook911f8632012-10-02 11:19:40 -0700314 depends on INET && PROC_FS && KPROBES
Stephen Hemmingera42e9d62006-06-05 17:30:32 -0700315 ---help---
316 This module allows for capturing the changes to TCP connection
Dave Jones9dadaa192006-06-08 23:42:09 -0700317 state in response to incoming packets. It is used for debugging
Stephen Hemmingera42e9d62006-06-05 17:30:32 -0700318 TCP congestion avoidance modules. If you don't understand
319 what was just said, you don't need it: say N.
320
Grant Grundler82fe7c92006-09-25 23:47:14 -0700321 Documentation on how to use TCP connection probing can be found
Michael Wittenc996d8b2010-11-15 19:55:34 +0000322 at:
323
324 http://www.linuxfoundation.org/collaborate/workgroups/networking/tcpprobe
Stephen Hemmingera42e9d62006-06-05 17:30:32 -0700325
326 To compile this code as a module, choose M here: the
327 module will be called tcp_probe.
328
Neil Horman273ae442009-03-11 09:53:16 +0000329config NET_DROP_MONITOR
Neil Hormancad456d2012-05-17 10:04:00 +0000330 tristate "Network packet drop alerting service"
Kees Cook911f8632012-10-02 11:19:40 -0700331 depends on INET && TRACEPOINTS
Neil Horman273ae442009-03-11 09:53:16 +0000332 ---help---
333 This feature provides an alerting service to userspace in the
334 event that packets are discarded in the network stack. Alerts
335 are broadcast via netlink socket to any listening user space
336 process. If you don't need network drop alerts, or if you are ok
337 just checking the various proc files and other utilities for
338 drop statistics, say N here.
339
Linus Torvalds1da177e2005-04-16 15:20:36 -0700340endmenu
341
342endmenu
343
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344source "net/ax25/Kconfig"
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800345source "net/can/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346source "net/irda/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700347source "net/bluetooth/Kconfig"
David Howells17926a72007-04-26 15:48:28 -0700348source "net/rxrpc/Kconfig"
Adrian Bunkd86b5e02006-01-21 00:46:55 +0100349
Thomas Graf14c0b972006-08-04 03:38:38 -0700350config FIB_RULES
351 bool
352
Robert P. J. Day54420602008-07-24 12:20:09 -0400353menuconfig WIRELESS
354 bool "Wireless"
Martin Schwidefskyf54bfc02007-05-10 15:46:01 +0200355 depends on !S390
Robert P. J. Day54420602008-07-24 12:20:09 -0400356 default y
357
358if WIRELESS
Johannes Berg2a5e1c02007-04-23 12:19:12 -0700359
360source "net/wireless/Kconfig"
Jiri Bencf0706e82007-05-05 11:45:53 -0700361source "net/mac80211/Kconfig"
Johannes Berg2a5e1c02007-04-23 12:19:12 -0700362
Robert P. J. Day54420602008-07-24 12:20:09 -0400363endif # WIRELESS
Johannes Berg2a5e1c02007-04-23 12:19:12 -0700364
Inaky Perez-Gonzalezb0c83ae2008-12-23 16:18:24 -0800365source "net/wimax/Kconfig"
366
Ivo van Doorncf4328c2007-05-07 00:34:20 -0700367source "net/rfkill/Kconfig"
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -0500368source "net/9p/Kconfig"
Sjur Braendeland3908c692010-03-30 13:56:28 +0000369source "net/caif/Kconfig"
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700370source "net/ceph/Kconfig"
Lauro Ramos Venancio3e256b82011-07-01 19:31:33 -0300371source "net/nfc/Kconfig"
Sjur Braendeland3908c692010-03-30 13:56:28 +0000372
Ivo van Doorncf4328c2007-05-07 00:34:20 -0700373
Sam Ravnborg6a2e9b72005-07-11 21:13:56 -0700374endif # if NET
Sam Ravnborge47b65b2012-05-21 20:45:37 +0200375
376# Used by archs to tell that they support BPF_JIT
377config HAVE_BPF_JIT
378 bool