1#
2# Network configuration
3#
4
5menuconfig NET
6	bool "Networking support"
7	select NLATTR
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
12	  other computer.
13
14	  If you are upgrading from an older kernel, you
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
24if NET
25
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
35	depends on WEXT_CORE || WANT_COMPAT_NETLINK_MESSAGES
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
46menu "Networking options"
47
48source "net/packet/Kconfig"
49source "net/unix/Kconfig"
50source "net/xfrm/Kconfig"
51source "net/iucv/Kconfig"
52
53config INET
54	bool "TCP/IP networking"
55	---help---
56	  These are the protocols used on the Internet and on most local
57	  Ethernets. It is highly recommended to say Y here (this will enlarge
58	  your kernel by about 400 KB), since some programs (e.g. the X window
59	  system) use TCP/IP even if your machine is not connected to any
60	  other computer. You will get the so-called loopback device which
61	  allows you to ping yourself (great fun, that!).
62
63	  For an excellent introduction to Linux networking, please read the
64	  Linux Networking HOWTO, available from
65	  <http://www.tldp.org/docs.html#howto>.
66
67	  If you say Y here and also to "/proc file system support" and
68	  "Sysctl support" below, you can change various aspects of the
69	  behavior of the TCP/IP code by writing to the (virtual) files in
70	  /proc/sys/net/ipv4/*; the options are explained in the file
71	  <file:Documentation/networking/ip-sysctl.txt>.
72
73	  Short answer: say Y.
74
75if INET
76source "net/ipv4/Kconfig"
77source "net/ipv6/Kconfig"
78source "net/netlabel/Kconfig"
79
80endif # if INET
81
82config NETWORK_SECMARK
83	bool "Security Marking"
84	help
85	  This enables security marking of network packets, similar
86	  to nfmark, but designated for security purposes.
87	  If you are unsure how to answer this question, answer N.
88
89config NETWORK_PHY_TIMESTAMPING
90	bool "Timestamping in PHY devices"
91	depends on EXPERIMENTAL
92	help
93	  This allows timestamping of network packets by PHYs with
94	  hardware timestamping capabilities. This option adds some
95	  overhead in the transmit and receive paths.
96
97	  If you are unsure how to answer this question, answer N.
98
99menuconfig NETFILTER
100	bool "Network packet filtering framework (Netfilter)"
101	---help---
102	  Netfilter is a framework for filtering and mangling network packets
103	  that pass through your Linux box.
104
105	  The most common use of packet filtering is to run your Linux box as
106	  a firewall protecting a local network from the Internet. The type of
107	  firewall provided by this kernel support is called a "packet
108	  filter", which means that it can reject individual network packets
109	  based on type, source, destination etc. The other kind of firewall,
110	  a "proxy-based" one, is more secure but more intrusive and more
111	  bothersome to set up; it inspects the network traffic much more
112	  closely, modifies it and has knowledge about the higher level
113	  protocols, which a packet filter lacks. Moreover, proxy-based
114	  firewalls often require changes to the programs running on the local
115	  clients. Proxy-based firewalls don't need support by the kernel, but
116	  they are often combined with a packet filter, which only works if
117	  you say Y here.
118
119	  You should also say Y here if you intend to use your Linux box as
120	  the gateway to the Internet for a local network of machines without
121	  globally valid IP addresses. This is called "masquerading": if one
122	  of the computers on your local network wants to send something to
123	  the outside, your box can "masquerade" as that computer, i.e. it
124	  forwards the traffic to the intended outside destination, but
125	  modifies the packets to make it look like they came from the
126	  firewall box itself. It works both ways: if the outside host
127	  replies, the Linux box will silently forward the traffic to the
128	  correct local computer. This way, the computers on your local net
129	  are completely invisible to the outside world, even though they can
130	  reach the outside and can receive replies. It is even possible to
131	  run globally visible servers from within a masqueraded local network
132	  using a mechanism called portforwarding. Masquerading is also often
133	  called NAT (Network Address Translation).
134
135	  Another use of Netfilter is in transparent proxying: if a machine on
136	  the local network tries to connect to an outside host, your Linux
137	  box can transparently forward the traffic to a local server,
138	  typically a caching proxy server.
139
140	  Yet another use of Netfilter is building a bridging firewall. Using
141	  a bridge with Network packet filtering enabled makes iptables "see"
142	  the bridged traffic. For filtering on the lower network and Ethernet
143	  protocols over the bridge, use ebtables (under bridge netfilter
144	  configuration).
145
146	  Various modules exist for netfilter which replace the previous
147	  masquerading (ipmasqadm), packet filtering (ipchains), transparent
148	  proxying, and portforwarding mechanisms. Please see
149	  <file:Documentation/Changes> under "iptables" for the location of
150	  these packages.
151
152if NETFILTER
153
154config NETFILTER_DEBUG
155	bool "Network packet filtering debugging"
156	depends on NETFILTER
157	help
158	  You can say Y here if you want to get additional messages useful in
159	  debugging the netfilter code.
160
161config NETFILTER_ADVANCED
162	bool "Advanced netfilter configuration"
163	depends on NETFILTER
164	default y
165	help
166	  If you say Y here you can select between all the netfilter modules.
167	  If you say N the more unusual ones will not be shown and the
168	  basic ones needed by most people will default to 'M'.
169
170	  If unsure, say Y.
171
172config BRIDGE_NETFILTER
173	bool "Bridged IP/ARP packets filtering"
174	depends on BRIDGE && NETFILTER && INET
175	depends on NETFILTER_ADVANCED
176	default y
177	---help---
178	  Enabling this option will let arptables resp. iptables see bridged
179	  ARP resp. IP traffic. If you want a bridging firewall, you probably
180	  want this option enabled.
181	  Enabling or disabling this option doesn't enable or disable
182	  ebtables.
183
184	  If unsure, say N.
185
186source "net/netfilter/Kconfig"
187source "net/ipv4/netfilter/Kconfig"
188source "net/ipv6/netfilter/Kconfig"
189source "net/decnet/netfilter/Kconfig"
190source "net/bridge/netfilter/Kconfig"
191
192endif
193
194source "net/dccp/Kconfig"
195source "net/sctp/Kconfig"
196source "net/rds/Kconfig"
197source "net/tipc/Kconfig"
198source "net/atm/Kconfig"
199source "net/l2tp/Kconfig"
200source "net/802/Kconfig"
201source "net/bridge/Kconfig"
202source "net/dsa/Kconfig"
203source "net/8021q/Kconfig"
204source "net/decnet/Kconfig"
205source "net/llc/Kconfig"
206source "net/ipx/Kconfig"
207source "drivers/net/appletalk/Kconfig"
208source "net/x25/Kconfig"
209source "net/lapb/Kconfig"
210source "net/econet/Kconfig"
211source "net/wanrouter/Kconfig"
212source "net/phonet/Kconfig"
213source "net/ieee802154/Kconfig"
214source "net/sched/Kconfig"
215source "net/dcb/Kconfig"
216source "net/dns_resolver/Kconfig"
217source "net/batman-adv/Kconfig"
218
219config RPS
220	boolean
221	depends on SMP && SYSFS && USE_GENERIC_SMP_HELPERS
222	default y
223
224config RFS_ACCEL
225	boolean
226	depends on RPS && GENERIC_HARDIRQS
227	select CPU_RMAP
228	default y
229
230config XPS
231	boolean
232	depends on SMP && SYSFS && USE_GENERIC_SMP_HELPERS
233	default y
234
235menu "Network testing"
236
237config NET_PKTGEN
238	tristate "Packet Generator (USE WITH CAUTION)"
239	depends on PROC_FS
240	---help---
241	  This module will inject preconfigured packets, at a configurable
242	  rate, out of a given interface.  It is used for network interface
243	  stress testing and performance analysis.  If you don't understand
244	  what was just said, you don't need it: say N.
245
246	  Documentation on how to use the packet generator can be found
247	  at <file:Documentation/networking/pktgen.txt>.
248
249	  To compile this code as a module, choose M here: the
250	  module will be called pktgen.
251
252config NET_TCPPROBE
253	tristate "TCP connection probing"
254	depends on INET && EXPERIMENTAL && PROC_FS && KPROBES
255	---help---
256	This module allows for capturing the changes to TCP connection
257	state in response to incoming packets. It is used for debugging
258	TCP congestion avoidance modules. If you don't understand
259	what was just said, you don't need it: say N.
260
261	Documentation on how to use TCP connection probing can be found
262	at:
263
264	  http://www.linuxfoundation.org/collaborate/workgroups/networking/tcpprobe
265
266	To compile this code as a module, choose M here: the
267	module will be called tcp_probe.
268
269config NET_DROP_MONITOR
270	boolean "Network packet drop alerting service"
271	depends on INET && EXPERIMENTAL && TRACEPOINTS
272	---help---
273	This feature provides an alerting service to userspace in the
274	event that packets are discarded in the network stack.  Alerts
275	are broadcast via netlink socket to any listening user space
276	process.  If you don't need network drop alerts, or if you are ok
277	just checking the various proc files and other utilities for
278	drop statistics, say N here.
279
280endmenu
281
282endmenu
283
284source "net/ax25/Kconfig"
285source "net/can/Kconfig"
286source "net/irda/Kconfig"
287source "net/bluetooth/Kconfig"
288source "net/rxrpc/Kconfig"
289
290config FIB_RULES
291	bool
292
293menuconfig WIRELESS
294	bool "Wireless"
295	depends on !S390
296	default y
297
298if WIRELESS
299
300source "net/wireless/Kconfig"
301source "net/mac80211/Kconfig"
302
303endif # WIRELESS
304
305source "net/wimax/Kconfig"
306
307source "net/rfkill/Kconfig"
308source "net/9p/Kconfig"
309source "net/caif/Kconfig"
310source "net/ceph/Kconfig"
311
312
313endif   # if NET
314