batman-adv: Change ifconfig examples to iproute2
[deliverable/linux.git] / net / Kconfig
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1#
2# Network configuration
3#
4
031cf19e 5menuconfig NET
1da177e4 6 bool "Networking support"
e9cc8bdd 7 select NLATTR
4cd5773a 8 select GENERIC_NET_UTILS
f89b7755 9 select BPF
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10 ---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
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14 other computer.
15
16 If you are upgrading from an older kernel, you
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17 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
6a2e9b73 26if NET
1da177e4 27
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28config 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
40b53d8a 37 depends on WEXT_CORE || WANT_COMPAT_NETLINK_MESSAGES
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38 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
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48config NET_INGRESS
49 bool
50
6a2e9b73 51menu "Networking options"
1da177e4 52
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53source "net/packet/Kconfig"
54source "net/unix/Kconfig"
55source "net/xfrm/Kconfig"
2356f4cb 56source "net/iucv/Kconfig"
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57
58config INET
59 bool "TCP/IP networking"
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60 select CRYPTO
61 select CRYPTO_AES
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62 ---help---
63 These are the protocols used on the Internet and on most local
64 Ethernets. It is highly recommended to say Y here (this will enlarge
cf80efc2 65 your kernel by about 400 KB), since some programs (e.g. the X window
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66 system) use TCP/IP even if your machine is not connected to any
67 other computer. You will get the so-called loopback device which
68 allows you to ping yourself (great fun, that!).
69
70 For an excellent introduction to Linux networking, please read the
71 Linux Networking HOWTO, available from
72 <http://www.tldp.org/docs.html#howto>.
73
74 If you say Y here and also to "/proc file system support" and
75 "Sysctl support" below, you can change various aspects of the
76 behavior of the TCP/IP code by writing to the (virtual) files in
77 /proc/sys/net/ipv4/*; the options are explained in the file
78 <file:Documentation/networking/ip-sysctl.txt>.
79
80 Short answer: say Y.
81
6a2e9b73 82if INET
1da177e4 83source "net/ipv4/Kconfig"
1da177e4 84source "net/ipv6/Kconfig"
38c94377 85source "net/netlabel/Kconfig"
1da177e4 86
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87endif # if INET
88
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89config NETWORK_SECMARK
90 bool "Security Marking"
91 help
92 This enables security marking of network packets, similar
93 to nfmark, but designated for security purposes.
94 If you are unsure how to answer this question, answer N.
95
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96config NET_PTP_CLASSIFY
97 def_bool n
98
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99config NETWORK_PHY_TIMESTAMPING
100 bool "Timestamping in PHY devices"
408eccce 101 select NET_PTP_CLASSIFY
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102 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
1da177e4 109menuconfig NETFILTER
ef91fd52 110 bool "Network packet filtering framework (Netfilter)"
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111 ---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
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162if 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
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171config 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.
692105b8 177 If you say N the more unusual ones will not be shown and the
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178 basic ones needed by most people will default to 'M'.
179
180 If unsure, say Y.
181
1da177e4 182config BRIDGE_NETFILTER
34666d46 183 tristate "Bridged IP/ARP packets filtering"
57f5877c 184 depends on BRIDGE
34666d46 185 depends on NETFILTER && INET
33b8e776 186 depends on NETFILTER_ADVANCED
34666d46 187 default m
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188 ---help---
189 Enabling this option will let arptables resp. iptables see bridged
190 ARP resp. IP traffic. If you want a bridging firewall, you probably
191 want this option enabled.
192 Enabling or disabling this option doesn't enable or disable
193 ebtables.
194
195 If unsure, say N.
196
9eb0eec7 197source "net/netfilter/Kconfig"
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198source "net/ipv4/netfilter/Kconfig"
199source "net/ipv6/netfilter/Kconfig"
200source "net/decnet/netfilter/Kconfig"
201source "net/bridge/netfilter/Kconfig"
202
203endif
204
7c657876 205source "net/dccp/Kconfig"
1da177e4 206source "net/sctp/Kconfig"
fe17f84f 207source "net/rds/Kconfig"
1e63e681 208source "net/tipc/Kconfig"
6a2e9b73 209source "net/atm/Kconfig"
fd558d18 210source "net/l2tp/Kconfig"
a19800d7 211source "net/802/Kconfig"
6a2e9b73 212source "net/bridge/Kconfig"
91da11f8 213source "net/dsa/Kconfig"
6a2e9b73 214source "net/8021q/Kconfig"
1da177e4 215source "net/decnet/Kconfig"
1da177e4 216source "net/llc/Kconfig"
1da177e4 217source "net/ipx/Kconfig"
1da177e4 218source "drivers/net/appletalk/Kconfig"
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219source "net/x25/Kconfig"
220source "net/lapb/Kconfig"
5075138d 221source "net/phonet/Kconfig"
2c6bed7c 222source "net/6lowpan/Kconfig"
9ec76716 223source "net/ieee802154/Kconfig"
1010f540 224source "net/mac802154/Kconfig"
1da177e4 225source "net/sched/Kconfig"
2f90b865 226source "net/dcb/Kconfig"
1a4240f4 227source "net/dns_resolver/Kconfig"
c6c8fea2 228source "net/batman-adv/Kconfig"
ccb1352e 229source "net/openvswitch/Kconfig"
d021c344 230source "net/vmw_vsock/Kconfig"
eaaa3139 231source "net/netlink/Kconfig"
0d89d203 232source "net/mpls/Kconfig"
f421436a 233source "net/hsr/Kconfig"
007f790c 234source "net/switchdev/Kconfig"
1b69c6d0 235source "net/l3mdev/Kconfig"
1da177e4 236
df334545 237config RPS
6341e62b 238 bool
044c8d4b 239 depends on SMP && SYSFS
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240 default y
241
c445477d 242config RFS_ACCEL
6341e62b 243 bool
0244ad00 244 depends on RPS
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245 select CPU_RMAP
246 default y
247
bf264145 248config XPS
6341e62b 249 bool
044c8d4b 250 depends on SMP
bf264145
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251 default y
252
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253config SOCK_CGROUP_DATA
254 bool
255 default n
256
86f8515f 257config CGROUP_NET_PRIO
af636337 258 bool "Network priority cgroup"
5bc1421e 259 depends on CGROUPS
2a56a1fe 260 select SOCK_CGROUP_DATA
5bc1421e
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261 ---help---
262 Cgroup subsystem for use in assigning processes to network priorities on
86f8515f 263 a per-interface basis.
5bc1421e 264
fe1217c4 265config CGROUP_NET_CLASSID
6341e62b 266 bool "Network classid cgroup"
fe1217c4 267 depends on CGROUPS
2a56a1fe 268 select SOCK_CGROUP_DATA
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269 ---help---
270 Cgroup subsystem for use as general purpose socket classid marker that is
271 being used in cls_cgroup and for netfilter matching.
272
e0d1095a 273config NET_RX_BUSY_POLL
6341e62b 274 bool
89bf1b5a 275 default y
06021292 276
114cf580 277config BQL
6341e62b 278 bool
114cf580
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279 depends on SYSFS
280 select DQL
281 default y
282
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283config BPF_JIT
284 bool "enable BPF Just In Time compiler"
285 depends on HAVE_BPF_JIT
b6202f97 286 depends on MODULES
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287 ---help---
288 Berkeley Packet Filter filtering capabilities are normally handled
289 by an interpreter. This option allows kernel to generate a native
290 code when filter is loaded in memory. This should speedup
291 packet sniffing (libpcap/tcpdump). Note : Admin should enable
292 this feature changing /proc/sys/net/core/bpf_jit_enable
293
99bbc707 294config NET_FLOW_LIMIT
6341e62b 295 bool
99bbc707
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296 depends on RPS
297 default y
298 ---help---
299 The network stack has to drop packets when a receive processing CPU's
300 backlog reaches netdev_max_backlog. If a few out of many active flows
301 generate the vast majority of load, drop their traffic earlier to
302 maintain capacity for the other flows. This feature provides servers
303 with many clients some protection against DoS by a single (spoofed)
304 flow that greatly exceeds average workload.
305
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306menu "Network testing"
307
308config NET_PKTGEN
309 tristate "Packet Generator (USE WITH CAUTION)"
ffd756b3 310 depends on INET && PROC_FS
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311 ---help---
312 This module will inject preconfigured packets, at a configurable
313 rate, out of a given interface. It is used for network interface
314 stress testing and performance analysis. If you don't understand
315 what was just said, you don't need it: say N.
316
317 Documentation on how to use the packet generator can be found
318 at <file:Documentation/networking/pktgen.txt>.
319
320 To compile this code as a module, choose M here: the
321 module will be called pktgen.
322
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323config NET_TCPPROBE
324 tristate "TCP connection probing"
911f8635 325 depends on INET && PROC_FS && KPROBES
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326 ---help---
327 This module allows for capturing the changes to TCP connection
9dadaa19 328 state in response to incoming packets. It is used for debugging
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329 TCP congestion avoidance modules. If you don't understand
330 what was just said, you don't need it: say N.
331
82fe7c92 332 Documentation on how to use TCP connection probing can be found
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333 at:
334
335 http://www.linuxfoundation.org/collaborate/workgroups/networking/tcpprobe
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336
337 To compile this code as a module, choose M here: the
338 module will be called tcp_probe.
339
273ae44b 340config NET_DROP_MONITOR
cad456d5 341 tristate "Network packet drop alerting service"
911f8635 342 depends on INET && TRACEPOINTS
273ae44b
NH
343 ---help---
344 This feature provides an alerting service to userspace in the
345 event that packets are discarded in the network stack. Alerts
346 are broadcast via netlink socket to any listening user space
347 process. If you don't need network drop alerts, or if you are ok
348 just checking the various proc files and other utilities for
349 drop statistics, say N here.
350
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351endmenu
352
353endmenu
354
1da177e4 355source "net/ax25/Kconfig"
0d66548a 356source "net/can/Kconfig"
1da177e4 357source "net/irda/Kconfig"
1da177e4 358source "net/bluetooth/Kconfig"
17926a79 359source "net/rxrpc/Kconfig"
d86b5e0e 360
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361config FIB_RULES
362 bool
363
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364menuconfig WIRELESS
365 bool "Wireless"
f54bfc0e 366 depends on !S390
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367 default y
368
369if WIRELESS
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370
371source "net/wireless/Kconfig"
f0706e82 372source "net/mac80211/Kconfig"
2a5e1c0e 373
5442060c 374endif # WIRELESS
2a5e1c0e 375
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376source "net/wimax/Kconfig"
377
cf4328cd 378source "net/rfkill/Kconfig"
bd238fb4 379source "net/9p/Kconfig"
3908c690 380source "net/caif/Kconfig"
3d14c5d2 381source "net/ceph/Kconfig"
3e256b8f 382source "net/nfc/Kconfig"
3908c690 383
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384config LWTUNNEL
385 bool "Network light weight tunnels"
386 ---help---
387 This feature provides an infrastructure to support light weight
388 tunnels like mpls. There is no netdevice associated with a light
389 weight tunnel endpoint. Tunnel encapsulation parameters are stored
390 with light weight tunnel state associated with fib routes.
cf4328cd 391
6a2e9b73 392endif # if NET
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393
394# Used by archs to tell that they support BPF_JIT
395config HAVE_BPF_JIT
396 bool
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