NFC: llcp: integer underflow in nfc_llcp_set_remote_gb()
[linux-2.6-block.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
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8 ---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
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12 other computer.
13
14 If you are upgrading from an older kernel, you
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15 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
6a2e9b73 24if NET
1da177e4 25
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26config WANT_COMPAT_NETLINK_MESSAGES
27 bool
28 help
29 This option can be selected by other options that need compat
30 netlink messages.
31
32config COMPAT_NETLINK_MESSAGES
33 def_bool y
34 depends on COMPAT
40b53d8a 35 depends on WEXT_CORE || WANT_COMPAT_NETLINK_MESSAGES
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36 help
37 This option makes it possible to send different netlink messages
38 to tasks depending on whether the task is a compat task or not. To
39 achieve this, you need to set skb_shinfo(skb)->frag_list to the
40 compat skb before sending the skb, the netlink code will sort out
41 which message to actually pass to the task.
42
43 Newly written code should NEVER need this option but do
44 compat-independent messages instead!
45
6a2e9b73 46menu "Networking options"
1da177e4 47
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48source "net/packet/Kconfig"
49source "net/unix/Kconfig"
50source "net/xfrm/Kconfig"
2356f4cb 51source "net/iucv/Kconfig"
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52
53config INET
54 bool "TCP/IP networking"
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55 select CRYPTO
56 select CRYPTO_AES
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57 ---help---
58 These are the protocols used on the Internet and on most local
59 Ethernets. It is highly recommended to say Y here (this will enlarge
cf80efc2 60 your kernel by about 400 KB), since some programs (e.g. the X window
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61 system) use TCP/IP even if your machine is not connected to any
62 other computer. You will get the so-called loopback device which
63 allows you to ping yourself (great fun, that!).
64
65 For an excellent introduction to Linux networking, please read the
66 Linux Networking HOWTO, available from
67 <http://www.tldp.org/docs.html#howto>.
68
69 If you say Y here and also to "/proc file system support" and
70 "Sysctl support" below, you can change various aspects of the
71 behavior of the TCP/IP code by writing to the (virtual) files in
72 /proc/sys/net/ipv4/*; the options are explained in the file
73 <file:Documentation/networking/ip-sysctl.txt>.
74
75 Short answer: say Y.
76
6a2e9b73 77if INET
1da177e4 78source "net/ipv4/Kconfig"
1da177e4 79source "net/ipv6/Kconfig"
38c94377 80source "net/netlabel/Kconfig"
1da177e4 81
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82endif # if INET
83
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84config NETWORK_SECMARK
85 bool "Security Marking"
86 help
87 This enables security marking of network packets, similar
88 to nfmark, but designated for security purposes.
89 If you are unsure how to answer this question, answer N.
90
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91config NETWORK_PHY_TIMESTAMPING
92 bool "Timestamping in PHY devices"
93 depends on EXPERIMENTAL
94 help
95 This allows timestamping of network packets by PHYs with
96 hardware timestamping capabilities. This option adds some
97 overhead in the transmit and receive paths.
98
99 If you are unsure how to answer this question, answer N.
100
1da177e4 101menuconfig NETFILTER
ef91fd52 102 bool "Network packet filtering framework (Netfilter)"
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103 ---help---
104 Netfilter is a framework for filtering and mangling network packets
105 that pass through your Linux box.
106
107 The most common use of packet filtering is to run your Linux box as
108 a firewall protecting a local network from the Internet. The type of
109 firewall provided by this kernel support is called a "packet
110 filter", which means that it can reject individual network packets
111 based on type, source, destination etc. The other kind of firewall,
112 a "proxy-based" one, is more secure but more intrusive and more
113 bothersome to set up; it inspects the network traffic much more
114 closely, modifies it and has knowledge about the higher level
115 protocols, which a packet filter lacks. Moreover, proxy-based
116 firewalls often require changes to the programs running on the local
117 clients. Proxy-based firewalls don't need support by the kernel, but
118 they are often combined with a packet filter, which only works if
119 you say Y here.
120
121 You should also say Y here if you intend to use your Linux box as
122 the gateway to the Internet for a local network of machines without
123 globally valid IP addresses. This is called "masquerading": if one
124 of the computers on your local network wants to send something to
125 the outside, your box can "masquerade" as that computer, i.e. it
126 forwards the traffic to the intended outside destination, but
127 modifies the packets to make it look like they came from the
128 firewall box itself. It works both ways: if the outside host
129 replies, the Linux box will silently forward the traffic to the
130 correct local computer. This way, the computers on your local net
131 are completely invisible to the outside world, even though they can
132 reach the outside and can receive replies. It is even possible to
133 run globally visible servers from within a masqueraded local network
134 using a mechanism called portforwarding. Masquerading is also often
135 called NAT (Network Address Translation).
136
137 Another use of Netfilter is in transparent proxying: if a machine on
138 the local network tries to connect to an outside host, your Linux
139 box can transparently forward the traffic to a local server,
140 typically a caching proxy server.
141
142 Yet another use of Netfilter is building a bridging firewall. Using
143 a bridge with Network packet filtering enabled makes iptables "see"
144 the bridged traffic. For filtering on the lower network and Ethernet
145 protocols over the bridge, use ebtables (under bridge netfilter
146 configuration).
147
148 Various modules exist for netfilter which replace the previous
149 masquerading (ipmasqadm), packet filtering (ipchains), transparent
150 proxying, and portforwarding mechanisms. Please see
151 <file:Documentation/Changes> under "iptables" for the location of
152 these packages.
153
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154if NETFILTER
155
156config NETFILTER_DEBUG
157 bool "Network packet filtering debugging"
158 depends on NETFILTER
159 help
160 You can say Y here if you want to get additional messages useful in
161 debugging the netfilter code.
162
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163config NETFILTER_ADVANCED
164 bool "Advanced netfilter configuration"
165 depends on NETFILTER
166 default y
167 help
168 If you say Y here you can select between all the netfilter modules.
692105b8 169 If you say N the more unusual ones will not be shown and the
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170 basic ones needed by most people will default to 'M'.
171
172 If unsure, say Y.
173
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174config BRIDGE_NETFILTER
175 bool "Bridged IP/ARP packets filtering"
176 depends on BRIDGE && NETFILTER && INET
33b8e776 177 depends on NETFILTER_ADVANCED
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178 default y
179 ---help---
180 Enabling this option will let arptables resp. iptables see bridged
181 ARP resp. IP traffic. If you want a bridging firewall, you probably
182 want this option enabled.
183 Enabling or disabling this option doesn't enable or disable
184 ebtables.
185
186 If unsure, say N.
187
9eb0eec7 188source "net/netfilter/Kconfig"
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189source "net/ipv4/netfilter/Kconfig"
190source "net/ipv6/netfilter/Kconfig"
191source "net/decnet/netfilter/Kconfig"
192source "net/bridge/netfilter/Kconfig"
193
194endif
195
7c657876 196source "net/dccp/Kconfig"
1da177e4 197source "net/sctp/Kconfig"
fe17f84f 198source "net/rds/Kconfig"
1e63e681 199source "net/tipc/Kconfig"
6a2e9b73 200source "net/atm/Kconfig"
fd558d18 201source "net/l2tp/Kconfig"
a19800d7 202source "net/802/Kconfig"
6a2e9b73 203source "net/bridge/Kconfig"
91da11f8 204source "net/dsa/Kconfig"
6a2e9b73 205source "net/8021q/Kconfig"
1da177e4 206source "net/decnet/Kconfig"
1da177e4 207source "net/llc/Kconfig"
1da177e4 208source "net/ipx/Kconfig"
1da177e4 209source "drivers/net/appletalk/Kconfig"
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210source "net/x25/Kconfig"
211source "net/lapb/Kconfig"
6a2e9b73 212source "net/wanrouter/Kconfig"
5075138d 213source "net/phonet/Kconfig"
9ec76716 214source "net/ieee802154/Kconfig"
1010f540 215source "net/mac802154/Kconfig"
1da177e4 216source "net/sched/Kconfig"
2f90b865 217source "net/dcb/Kconfig"
1a4240f4 218source "net/dns_resolver/Kconfig"
c6c8fea2 219source "net/batman-adv/Kconfig"
ccb1352e 220source "net/openvswitch/Kconfig"
1da177e4 221
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222config RPS
223 boolean
6dcbc122 224 depends on SMP && SYSFS && USE_GENERIC_SMP_HELPERS
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225 default y
226
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227config RFS_ACCEL
228 boolean
229 depends on RPS && GENERIC_HARDIRQS
230 select CPU_RMAP
231 default y
232
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233config XPS
234 boolean
235 depends on SMP && SYSFS && USE_GENERIC_SMP_HELPERS
236 default y
237
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238config NETPRIO_CGROUP
239 tristate "Network priority cgroup"
240 depends on CGROUPS
241 ---help---
242 Cgroup subsystem for use in assigning processes to network priorities on
243 a per-interface basis
244
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245config BQL
246 boolean
247 depends on SYSFS
248 select DQL
249 default y
250
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251config BPF_JIT
252 bool "enable BPF Just In Time compiler"
253 depends on HAVE_BPF_JIT
b6202f97 254 depends on MODULES
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255 ---help---
256 Berkeley Packet Filter filtering capabilities are normally handled
257 by an interpreter. This option allows kernel to generate a native
258 code when filter is loaded in memory. This should speedup
259 packet sniffing (libpcap/tcpdump). Note : Admin should enable
260 this feature changing /proc/sys/net/core/bpf_jit_enable
261
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262menu "Network testing"
263
264config NET_PKTGEN
265 tristate "Packet Generator (USE WITH CAUTION)"
266 depends on PROC_FS
267 ---help---
268 This module will inject preconfigured packets, at a configurable
269 rate, out of a given interface. It is used for network interface
270 stress testing and performance analysis. If you don't understand
271 what was just said, you don't need it: say N.
272
273 Documentation on how to use the packet generator can be found
274 at <file:Documentation/networking/pktgen.txt>.
275
276 To compile this code as a module, choose M here: the
277 module will be called pktgen.
278
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279config NET_TCPPROBE
280 tristate "TCP connection probing"
281 depends on INET && EXPERIMENTAL && PROC_FS && KPROBES
282 ---help---
283 This module allows for capturing the changes to TCP connection
9dadaa19 284 state in response to incoming packets. It is used for debugging
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285 TCP congestion avoidance modules. If you don't understand
286 what was just said, you don't need it: say N.
287
82fe7c92 288 Documentation on how to use TCP connection probing can be found
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289 at:
290
291 http://www.linuxfoundation.org/collaborate/workgroups/networking/tcpprobe
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292
293 To compile this code as a module, choose M here: the
294 module will be called tcp_probe.
295
273ae44b 296config NET_DROP_MONITOR
cad456d5 297 tristate "Network packet drop alerting service"
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298 depends on INET && EXPERIMENTAL && TRACEPOINTS
299 ---help---
300 This feature provides an alerting service to userspace in the
301 event that packets are discarded in the network stack. Alerts
302 are broadcast via netlink socket to any listening user space
303 process. If you don't need network drop alerts, or if you are ok
304 just checking the various proc files and other utilities for
305 drop statistics, say N here.
306
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307endmenu
308
309endmenu
310
1da177e4 311source "net/ax25/Kconfig"
0d66548a 312source "net/can/Kconfig"
1da177e4 313source "net/irda/Kconfig"
1da177e4 314source "net/bluetooth/Kconfig"
17926a79 315source "net/rxrpc/Kconfig"
d86b5e0e 316
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317config FIB_RULES
318 bool
319
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320menuconfig WIRELESS
321 bool "Wireless"
f54bfc0e 322 depends on !S390
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323 default y
324
325if WIRELESS
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326
327source "net/wireless/Kconfig"
f0706e82 328source "net/mac80211/Kconfig"
2a5e1c0e 329
5442060c 330endif # WIRELESS
2a5e1c0e 331
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332source "net/wimax/Kconfig"
333
cf4328cd 334source "net/rfkill/Kconfig"
bd238fb4 335source "net/9p/Kconfig"
3908c690 336source "net/caif/Kconfig"
3d14c5d2 337source "net/ceph/Kconfig"
3e256b8f 338source "net/nfc/Kconfig"
3908c690 339
cf4328cd 340
6a2e9b73 341endif # if NET
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342
343# Used by archs to tell that they support BPF_JIT
344config HAVE_BPF_JIT
345 bool