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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
Linus Torvalds1da177e2005-04-16 15:20:36 -07008 ---help---
9 Unless you really know what you are doing, you should say Y here.
10 The reason is that some programs need kernel networking support even
11 when running on a stand-alone machine that isn't connected to any
Sam Ravnborgd5950b42005-07-11 21:03:49 -070012 other computer.
13
14 If you are upgrading from an older kernel, you
Linus Torvalds1da177e2005-04-16 15:20:36 -070015 should consider updating your networking tools too because changes
16 in the kernel and the tools often go hand in hand. The tools are
17 contained in the package net-tools, the location and version number
18 of which are given in <file:Documentation/Changes>.
19
20 For a general introduction to Linux networking, it is highly
21 recommended to read the NET-HOWTO, available from
22 <http://www.tldp.org/docs.html#howto>.
23
Sam Ravnborg6a2e9b72005-07-11 21:13:56 -070024if NET
25
Patrick McHardyccdfcc32013-04-17 06:47:01 +000026config NETLINK_MMAP
27 bool "Netlink: mmaped IO"
28 help
29 This option enables support for memory mapped netlink IO. This
30 reduces overhead by avoiding copying data between kernel- and
31 userspace.
32
33 If unsure, say N.
34
Johannes Berg1dacc762009-07-01 11:26:02 +000035config WANT_COMPAT_NETLINK_MESSAGES
36 bool
37 help
38 This option can be selected by other options that need compat
39 netlink messages.
40
41config COMPAT_NETLINK_MESSAGES
42 def_bool y
43 depends on COMPAT
David S. Miller40b53d82010-07-26 13:13:49 -070044 depends on WEXT_CORE || WANT_COMPAT_NETLINK_MESSAGES
Johannes Berg1dacc762009-07-01 11:26:02 +000045 help
46 This option makes it possible to send different netlink messages
47 to tasks depending on whether the task is a compat task or not. To
48 achieve this, you need to set skb_shinfo(skb)->frag_list to the
49 compat skb before sending the skb, the netlink code will sort out
50 which message to actually pass to the task.
51
52 Newly written code should NEVER need this option but do
53 compat-independent messages instead!
54
Linus Torvalds1da177e2005-04-16 15:20:36 -070055menu "Networking options"
Linus Torvalds1da177e2005-04-16 15:20:36 -070056
Sam Ravnborg6a2e9b72005-07-11 21:13:56 -070057source "net/packet/Kconfig"
58source "net/unix/Kconfig"
59source "net/xfrm/Kconfig"
Martin Schwidefsky2356f4c2007-02-08 13:37:42 -080060source "net/iucv/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -070061
62config INET
63 bool "TCP/IP networking"
David S. Miller798b2cb2012-09-04 14:20:14 -040064 select CRYPTO
65 select CRYPTO_AES
Linus Torvalds1da177e2005-04-16 15:20:36 -070066 ---help---
67 These are the protocols used on the Internet and on most local
68 Ethernets. It is highly recommended to say Y here (this will enlarge
YOSHIFUJI Hideakicf80efc2008-02-12 17:35:16 +090069 your kernel by about 400 KB), since some programs (e.g. the X window
Linus Torvalds1da177e2005-04-16 15:20:36 -070070 system) use TCP/IP even if your machine is not connected to any
71 other computer. You will get the so-called loopback device which
72 allows you to ping yourself (great fun, that!).
73
74 For an excellent introduction to Linux networking, please read the
75 Linux Networking HOWTO, available from
76 <http://www.tldp.org/docs.html#howto>.
77
78 If you say Y here and also to "/proc file system support" and
79 "Sysctl support" below, you can change various aspects of the
80 behavior of the TCP/IP code by writing to the (virtual) files in
81 /proc/sys/net/ipv4/*; the options are explained in the file
82 <file:Documentation/networking/ip-sysctl.txt>.
83
84 Short answer: say Y.
85
Sam Ravnborg6a2e9b72005-07-11 21:13:56 -070086if INET
Linus Torvalds1da177e2005-04-16 15:20:36 -070087source "net/ipv4/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -070088source "net/ipv6/Kconfig"
Paul Moore38c94372006-11-05 16:44:06 -080089source "net/netlabel/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -070090
Sam Ravnborg6a2e9b72005-07-11 21:13:56 -070091endif # if INET
92
James Morris984bc162006-06-09 00:29:17 -070093config NETWORK_SECMARK
94 bool "Security Marking"
95 help
96 This enables security marking of network packets, similar
97 to nfmark, but designated for security purposes.
98 If you are unsure how to answer this question, answer N.
99
Richard Cochranc1f19b52010-07-17 08:49:36 +0000100config NETWORK_PHY_TIMESTAMPING
101 bool "Timestamping in PHY devices"
Richard Cochranc1f19b52010-07-17 08:49:36 +0000102 help
103 This allows timestamping of network packets by PHYs with
104 hardware timestamping capabilities. This option adds some
105 overhead in the transmit and receive paths.
106
107 If you are unsure how to answer this question, answer N.
108
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109menuconfig NETFILTER
Pablo Neira Ayusoef91fd52006-11-29 02:35:43 +0100110 bool "Network packet filtering framework (Netfilter)"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111 ---help---
112 Netfilter is a framework for filtering and mangling network packets
113 that pass through your Linux box.
114
115 The most common use of packet filtering is to run your Linux box as
116 a firewall protecting a local network from the Internet. The type of
117 firewall provided by this kernel support is called a "packet
118 filter", which means that it can reject individual network packets
119 based on type, source, destination etc. The other kind of firewall,
120 a "proxy-based" one, is more secure but more intrusive and more
121 bothersome to set up; it inspects the network traffic much more
122 closely, modifies it and has knowledge about the higher level
123 protocols, which a packet filter lacks. Moreover, proxy-based
124 firewalls often require changes to the programs running on the local
125 clients. Proxy-based firewalls don't need support by the kernel, but
126 they are often combined with a packet filter, which only works if
127 you say Y here.
128
129 You should also say Y here if you intend to use your Linux box as
130 the gateway to the Internet for a local network of machines without
131 globally valid IP addresses. This is called "masquerading": if one
132 of the computers on your local network wants to send something to
133 the outside, your box can "masquerade" as that computer, i.e. it
134 forwards the traffic to the intended outside destination, but
135 modifies the packets to make it look like they came from the
136 firewall box itself. It works both ways: if the outside host
137 replies, the Linux box will silently forward the traffic to the
138 correct local computer. This way, the computers on your local net
139 are completely invisible to the outside world, even though they can
140 reach the outside and can receive replies. It is even possible to
141 run globally visible servers from within a masqueraded local network
142 using a mechanism called portforwarding. Masquerading is also often
143 called NAT (Network Address Translation).
144
145 Another use of Netfilter is in transparent proxying: if a machine on
146 the local network tries to connect to an outside host, your Linux
147 box can transparently forward the traffic to a local server,
148 typically a caching proxy server.
149
150 Yet another use of Netfilter is building a bridging firewall. Using
151 a bridge with Network packet filtering enabled makes iptables "see"
152 the bridged traffic. For filtering on the lower network and Ethernet
153 protocols over the bridge, use ebtables (under bridge netfilter
154 configuration).
155
156 Various modules exist for netfilter which replace the previous
157 masquerading (ipmasqadm), packet filtering (ipchains), transparent
158 proxying, and portforwarding mechanisms. Please see
159 <file:Documentation/Changes> under "iptables" for the location of
160 these packages.
161
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162if NETFILTER
163
164config NETFILTER_DEBUG
165 bool "Network packet filtering debugging"
166 depends on NETFILTER
167 help
168 You can say Y here if you want to get additional messages useful in
169 debugging the netfilter code.
170
Patrick McHardy33b8e772007-12-17 22:47:05 -0800171config NETFILTER_ADVANCED
172 bool "Advanced netfilter configuration"
173 depends on NETFILTER
174 default y
175 help
176 If you say Y here you can select between all the netfilter modules.
Matt LaPlante692105b2009-01-26 11:12:25 +0100177 If you say N the more unusual ones will not be shown and the
Patrick McHardy33b8e772007-12-17 22:47:05 -0800178 basic ones needed by most people will default to 'M'.
179
180 If unsure, say Y.
181
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182config BRIDGE_NETFILTER
183 bool "Bridged IP/ARP packets filtering"
184 depends on BRIDGE && NETFILTER && INET
Patrick McHardy33b8e772007-12-17 22:47:05 -0800185 depends on NETFILTER_ADVANCED
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186 default y
187 ---help---
188 Enabling this option will let arptables resp. iptables see bridged
189 ARP resp. IP traffic. If you want a bridging firewall, you probably
190 want this option enabled.
191 Enabling or disabling this option doesn't enable or disable
192 ebtables.
193
194 If unsure, say N.
195
Harald Welte9eb0eec2005-09-17 00:41:21 -0700196source "net/netfilter/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197source "net/ipv4/netfilter/Kconfig"
198source "net/ipv6/netfilter/Kconfig"
199source "net/decnet/netfilter/Kconfig"
200source "net/bridge/netfilter/Kconfig"
201
202endif
203
Arnaldo Carvalho de Melo7c657872005-08-09 20:14:34 -0700204source "net/dccp/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205source "net/sctp/Kconfig"
Andy Groverfe17f842009-02-24 15:30:39 +0000206source "net/rds/Kconfig"
Per Liden1e63e682006-01-16 16:39:13 +0100207source "net/tipc/Kconfig"
Sam Ravnborg6a2e9b72005-07-11 21:13:56 -0700208source "net/atm/Kconfig"
James Chapmanfd558d12010-04-02 06:18:33 +0000209source "net/l2tp/Kconfig"
Patrick McHardya19800d2008-07-05 21:25:39 -0700210source "net/802/Kconfig"
Sam Ravnborg6a2e9b72005-07-11 21:13:56 -0700211source "net/bridge/Kconfig"
Lennert Buytenhek91da11f2008-10-07 13:44:02 +0000212source "net/dsa/Kconfig"
Sam Ravnborg6a2e9b72005-07-11 21:13:56 -0700213source "net/8021q/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214source "net/decnet/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215source "net/llc/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700216source "net/ipx/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700217source "drivers/net/appletalk/Kconfig"
Sam Ravnborg6a2e9b72005-07-11 21:13:56 -0700218source "net/x25/Kconfig"
219source "net/lapb/Kconfig"
remi.denis-courmont@nokia50751382009-01-23 03:00:25 +0000220source "net/phonet/Kconfig"
Sergey Lapin9ec76712009-06-08 12:18:48 +0000221source "net/ieee802154/Kconfig"
alex.bluesman.smirnov@gmail.com1010f542012-05-15 20:50:20 +0000222source "net/mac802154/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223source "net/sched/Kconfig"
Alexander Duyck2f90b862008-11-20 20:52:10 -0800224source "net/dcb/Kconfig"
Wang Lei1a4240f2010-08-04 15:16:33 +0100225source "net/dns_resolver/Kconfig"
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000226source "net/batman-adv/Kconfig"
Jesse Grossccb13522011-10-25 19:26:31 -0700227source "net/openvswitch/Kconfig"
Andy Kingd021c342013-02-06 14:23:56 +0000228source "net/vmw_vsock/Kconfig"
Andrey Vagineaaa3132013-03-21 20:33:48 +0400229source "net/netlink/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230
Eric Dumazetdf334542010-03-24 19:13:54 +0000231config RPS
232 boolean
David S. Miller6dcbc122010-09-14 21:41:20 -0700233 depends on SMP && SYSFS && USE_GENERIC_SMP_HELPERS
Eric Dumazetdf334542010-03-24 19:13:54 +0000234 default y
235
Ben Hutchingsc4454772011-01-19 11:03:53 +0000236config RFS_ACCEL
237 boolean
238 depends on RPS && GENERIC_HARDIRQS
239 select CPU_RMAP
240 default y
241
Tom Herbertbf264142010-11-26 08:36:09 +0000242config XPS
243 boolean
Alexander Duyck024e9672013-01-10 08:57:46 +0000244 depends on SMP && USE_GENERIC_SMP_HELPERS
Tom Herbertbf264142010-11-26 08:36:09 +0000245 default y
246
Neil Horman5bc14212011-11-22 05:10:51 +0000247config NETPRIO_CGROUP
248 tristate "Network priority cgroup"
249 depends on CGROUPS
250 ---help---
251 Cgroup subsystem for use in assigning processes to network priorities on
252 a per-interface basis
253
Tom Herbert114cf582011-11-28 16:33:09 +0000254config BQL
255 boolean
256 depends on SYSFS
257 select DQL
258 default y
259
Eric Dumazet0a148422011-04-20 09:27:32 +0000260config BPF_JIT
261 bool "enable BPF Just In Time compiler"
262 depends on HAVE_BPF_JIT
Eric Dumazetb6202f92011-04-29 10:20:53 -0700263 depends on MODULES
Eric Dumazet0a148422011-04-20 09:27:32 +0000264 ---help---
265 Berkeley Packet Filter filtering capabilities are normally handled
266 by an interpreter. This option allows kernel to generate a native
267 code when filter is loaded in memory. This should speedup
268 packet sniffing (libpcap/tcpdump). Note : Admin should enable
269 this feature changing /proc/sys/net/core/bpf_jit_enable
270
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271menu "Network testing"
272
273config NET_PKTGEN
274 tristate "Packet Generator (USE WITH CAUTION)"
275 depends on PROC_FS
276 ---help---
277 This module will inject preconfigured packets, at a configurable
278 rate, out of a given interface. It is used for network interface
279 stress testing and performance analysis. If you don't understand
280 what was just said, you don't need it: say N.
281
282 Documentation on how to use the packet generator can be found
283 at <file:Documentation/networking/pktgen.txt>.
284
285 To compile this code as a module, choose M here: the
286 module will be called pktgen.
287
Stephen Hemmingera42e9d62006-06-05 17:30:32 -0700288config NET_TCPPROBE
289 tristate "TCP connection probing"
Kees Cook911f8632012-10-02 11:19:40 -0700290 depends on INET && PROC_FS && KPROBES
Stephen Hemmingera42e9d62006-06-05 17:30:32 -0700291 ---help---
292 This module allows for capturing the changes to TCP connection
Dave Jones9dadaa192006-06-08 23:42:09 -0700293 state in response to incoming packets. It is used for debugging
Stephen Hemmingera42e9d62006-06-05 17:30:32 -0700294 TCP congestion avoidance modules. If you don't understand
295 what was just said, you don't need it: say N.
296
Grant Grundler82fe7c92006-09-25 23:47:14 -0700297 Documentation on how to use TCP connection probing can be found
Michael Wittenc996d8b2010-11-15 19:55:34 +0000298 at:
299
300 http://www.linuxfoundation.org/collaborate/workgroups/networking/tcpprobe
Stephen Hemmingera42e9d62006-06-05 17:30:32 -0700301
302 To compile this code as a module, choose M here: the
303 module will be called tcp_probe.
304
Neil Horman273ae442009-03-11 09:53:16 +0000305config NET_DROP_MONITOR
Neil Hormancad456d2012-05-17 10:04:00 +0000306 tristate "Network packet drop alerting service"
Kees Cook911f8632012-10-02 11:19:40 -0700307 depends on INET && TRACEPOINTS
Neil Horman273ae442009-03-11 09:53:16 +0000308 ---help---
309 This feature provides an alerting service to userspace in the
310 event that packets are discarded in the network stack. Alerts
311 are broadcast via netlink socket to any listening user space
312 process. If you don't need network drop alerts, or if you are ok
313 just checking the various proc files and other utilities for
314 drop statistics, say N here.
315
Linus Torvalds1da177e2005-04-16 15:20:36 -0700316endmenu
317
318endmenu
319
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320source "net/ax25/Kconfig"
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800321source "net/can/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700322source "net/irda/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700323source "net/bluetooth/Kconfig"
David Howells17926a72007-04-26 15:48:28 -0700324source "net/rxrpc/Kconfig"
Adrian Bunkd86b5e02006-01-21 00:46:55 +0100325
Thomas Graf14c0b972006-08-04 03:38:38 -0700326config FIB_RULES
327 bool
328
Robert P. J. Day54420602008-07-24 12:20:09 -0400329menuconfig WIRELESS
330 bool "Wireless"
Martin Schwidefskyf54bfc02007-05-10 15:46:01 +0200331 depends on !S390
Robert P. J. Day54420602008-07-24 12:20:09 -0400332 default y
333
334if WIRELESS
Johannes Berg2a5e1c02007-04-23 12:19:12 -0700335
336source "net/wireless/Kconfig"
Jiri Bencf0706e82007-05-05 11:45:53 -0700337source "net/mac80211/Kconfig"
Johannes Berg2a5e1c02007-04-23 12:19:12 -0700338
Robert P. J. Day54420602008-07-24 12:20:09 -0400339endif # WIRELESS
Johannes Berg2a5e1c02007-04-23 12:19:12 -0700340
Inaky Perez-Gonzalezb0c83ae2008-12-23 16:18:24 -0800341source "net/wimax/Kconfig"
342
Ivo van Doorncf4328c2007-05-07 00:34:20 -0700343source "net/rfkill/Kconfig"
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -0500344source "net/9p/Kconfig"
Sjur Braendeland3908c692010-03-30 13:56:28 +0000345source "net/caif/Kconfig"
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700346source "net/ceph/Kconfig"
Lauro Ramos Venancio3e256b82011-07-01 19:31:33 -0300347source "net/nfc/Kconfig"
Sjur Braendeland3908c692010-03-30 13:56:28 +0000348
Ivo van Doorncf4328c2007-05-07 00:34:20 -0700349
Sam Ravnborg6a2e9b72005-07-11 21:13:56 -0700350endif # if NET
Sam Ravnborge47b65b2012-05-21 20:45:37 +0200351
352# Used by archs to tell that they support BPF_JIT
353config HAVE_BPF_JIT
354 bool