xref: /openbmc/linux/net/ipv6/Kconfig (revision 7cf74d51) 
1#
2# IPv6 configuration
3#
4
5#   IPv6 as module will cause a CRASH if you try to unload it
6menuconfig IPV6
7	tristate "The IPv6 protocol"
8	default y
9	---help---
10	  Support for IP version 6 (IPv6).
11
12	  For general information about IPv6, see
13	  <https://en.wikipedia.org/wiki/IPv6>.
14	  For specific information about IPv6 under Linux, see
15	  Documentation/networking/ipv6.txt and read the HOWTO at
16	  <http://www.tldp.org/HOWTO/Linux+IPv6-HOWTO/>
17
18	  To compile this protocol support as a module, choose M here: the
19	  module will be called ipv6.
20
21if IPV6
22
23config IPV6_ROUTER_PREF
24	bool "IPv6: Router Preference (RFC 4191) support"
25	---help---
26	  Router Preference is an optional extension to the Router
27	  Advertisement message which improves the ability of hosts
28	  to pick an appropriate router, especially when the hosts
29	  are placed in a multi-homed network.
30
31	  If unsure, say N.
32
33config IPV6_ROUTE_INFO
34	bool "IPv6: Route Information (RFC 4191) support"
35	depends on IPV6_ROUTER_PREF
36	---help---
37	  Support of Route Information.
38
39	  If unsure, say N.
40
41config IPV6_OPTIMISTIC_DAD
42	bool "IPv6: Enable RFC 4429 Optimistic DAD"
43	---help---
44	  Support for optimistic Duplicate Address Detection. It allows for
45	  autoconfigured addresses to be used more quickly.
46
47	  If unsure, say N.
48
49config INET6_AH
50	tristate "IPv6: AH transformation"
51	select XFRM_ALGO
52	select CRYPTO
53	select CRYPTO_HMAC
54	select CRYPTO_MD5
55	select CRYPTO_SHA1
56	---help---
57	  Support for IPsec AH.
58
59	  If unsure, say Y.
60
61config INET6_ESP
62	tristate "IPv6: ESP transformation"
63	select XFRM_ALGO
64	select CRYPTO
65	select CRYPTO_AUTHENC
66	select CRYPTO_HMAC
67	select CRYPTO_MD5
68	select CRYPTO_CBC
69	select CRYPTO_SHA1
70	select CRYPTO_DES
71	select CRYPTO_ECHAINIV
72	---help---
73	  Support for IPsec ESP.
74
75	  If unsure, say Y.
76
77config INET6_ESP_OFFLOAD
78	tristate "IPv6: ESP transformation offload"
79	depends on INET6_ESP
80	select XFRM_OFFLOAD
81	default n
82	---help---
83	  Support for ESP transformation offload. This makes sense
84	  only if this system really does IPsec and want to do it
85	  with high throughput. A typical desktop system does not
86	  need it, even if it does IPsec.
87
88	  If unsure, say N.
89
90config INET6_IPCOMP
91	tristate "IPv6: IPComp transformation"
92	select INET6_XFRM_TUNNEL
93	select XFRM_IPCOMP
94	---help---
95	  Support for IP Payload Compression Protocol (IPComp) (RFC3173),
96	  typically needed for IPsec.
97
98	  If unsure, say Y.
99
100config IPV6_MIP6
101	tristate "IPv6: Mobility"
102	select XFRM
103	---help---
104	  Support for IPv6 Mobility described in RFC 3775.
105
106	  If unsure, say N.
107
108config IPV6_ILA
109	tristate "IPv6: Identifier Locator Addressing (ILA)"
110	depends on NETFILTER
111	select DST_CACHE
112	select LWTUNNEL
113	---help---
114	  Support for IPv6 Identifier Locator Addressing (ILA).
115
116	  ILA is a mechanism to do network virtualization without
117	  encapsulation. The basic concept of ILA is that we split an
118	  IPv6 address into a 64 bit locator and 64 bit identifier. The
119	  identifier is the identity of an entity in communication
120	  ("who") and the locator expresses the location of the
121	  entity ("where").
122
123	  ILA can be configured using the "encap ila" option with
124	  "ip -6 route" command. ILA is described in
125	  https://tools.ietf.org/html/draft-herbert-nvo3-ila-00.
126
127	  If unsure, say N.
128
129config INET6_XFRM_TUNNEL
130	tristate
131	select INET6_TUNNEL
132	default n
133
134config INET6_TUNNEL
135	tristate
136	default n
137
138config INET6_XFRM_MODE_TRANSPORT
139	tristate "IPv6: IPsec transport mode"
140	default IPV6
141	select XFRM
142	---help---
143	  Support for IPsec transport mode.
144
145	  If unsure, say Y.
146
147config INET6_XFRM_MODE_TUNNEL
148	tristate "IPv6: IPsec tunnel mode"
149	default IPV6
150	select XFRM
151	---help---
152	  Support for IPsec tunnel mode.
153
154	  If unsure, say Y.
155
156config INET6_XFRM_MODE_BEET
157	tristate "IPv6: IPsec BEET mode"
158	default IPV6
159	select XFRM
160	---help---
161	  Support for IPsec BEET mode.
162
163	  If unsure, say Y.
164
165config INET6_XFRM_MODE_ROUTEOPTIMIZATION
166	tristate "IPv6: MIPv6 route optimization mode"
167	select XFRM
168	---help---
169	  Support for MIPv6 route optimization mode.
170
171config IPV6_VTI
172tristate "Virtual (secure) IPv6: tunneling"
173	select IPV6_TUNNEL
174	select NET_IP_TUNNEL
175	depends on INET6_XFRM_MODE_TUNNEL
176	---help---
177	Tunneling means encapsulating data of one protocol type within
178	another protocol and sending it over a channel that understands the
179	encapsulating protocol. This can be used with xfrm mode tunnel to give
180	the notion of a secure tunnel for IPSEC and then use routing protocol
181	on top.
182
183config IPV6_SIT
184	tristate "IPv6: IPv6-in-IPv4 tunnel (SIT driver)"
185	select INET_TUNNEL
186	select NET_IP_TUNNEL
187	select IPV6_NDISC_NODETYPE
188	default y
189	---help---
190	  Tunneling means encapsulating data of one protocol type within
191	  another protocol and sending it over a channel that understands the
192	  encapsulating protocol. This driver implements encapsulation of IPv6
193	  into IPv4 packets. This is useful if you want to connect two IPv6
194	  networks over an IPv4-only path.
195
196	  Saying M here will produce a module called sit. If unsure, say Y.
197
198config IPV6_SIT_6RD
199	bool "IPv6: IPv6 Rapid Deployment (6RD)"
200	depends on IPV6_SIT
201	default n
202	---help---
203	  IPv6 Rapid Deployment (6rd; draft-ietf-softwire-ipv6-6rd) builds upon
204	  mechanisms of 6to4 (RFC3056) to enable a service provider to rapidly
205	  deploy IPv6 unicast service to IPv4 sites to which it provides
206	  customer premise equipment.  Like 6to4, it utilizes stateless IPv6 in
207	  IPv4 encapsulation in order to transit IPv4-only network
208	  infrastructure.  Unlike 6to4, a 6rd service provider uses an IPv6
209	  prefix of its own in place of the fixed 6to4 prefix.
210
211	  With this option enabled, the SIT driver offers 6rd functionality by
212	  providing additional ioctl API to configure the IPv6 Prefix for in
213	  stead of static 2002::/16 for 6to4.
214
215	  If unsure, say N.
216
217config IPV6_NDISC_NODETYPE
218	bool
219
220config IPV6_TUNNEL
221	tristate "IPv6: IP-in-IPv6 tunnel (RFC2473)"
222	select INET6_TUNNEL
223	select DST_CACHE
224	select GRO_CELLS
225	---help---
226	  Support for IPv6-in-IPv6 and IPv4-in-IPv6 tunnels described in
227	  RFC 2473.
228
229	  If unsure, say N.
230
231config IPV6_GRE
232	tristate "IPv6: GRE tunnel"
233	select IPV6_TUNNEL
234	select NET_IP_TUNNEL
235	depends on NET_IPGRE_DEMUX
236	---help---
237	  Tunneling means encapsulating data of one protocol type within
238	  another protocol and sending it over a channel that understands the
239	  encapsulating protocol. This particular tunneling driver implements
240	  GRE (Generic Routing Encapsulation) and at this time allows
241	  encapsulating of IPv4 or IPv6 over existing IPv6 infrastructure.
242	  This driver is useful if the other endpoint is a Cisco router: Cisco
243	  likes GRE much better than the other Linux tunneling driver ("IP
244	  tunneling" above). In addition, GRE allows multicast redistribution
245	  through the tunnel.
246
247	  Saying M here will produce a module called ip6_gre. If unsure, say N.
248
249config IPV6_FOU
250	tristate
251	default NET_FOU && IPV6
252
253config IPV6_FOU_TUNNEL
254	tristate
255	default NET_FOU_IP_TUNNELS && IPV6_FOU
256	select IPV6_TUNNEL
257
258config IPV6_MULTIPLE_TABLES
259	bool "IPv6: Multiple Routing Tables"
260	select FIB_RULES
261	---help---
262	  Support multiple routing tables.
263
264config IPV6_SUBTREES
265	bool "IPv6: source address based routing"
266	depends on IPV6_MULTIPLE_TABLES
267	---help---
268	  Enable routing by source address or prefix.
269
270	  The destination address is still the primary routing key, so mixing
271	  normal and source prefix specific routes in the same routing table
272	  may sometimes lead to unintended routing behavior.  This can be
273	  avoided by defining different routing tables for the normal and
274	  source prefix specific routes.
275
276	  If unsure, say N.
277
278config IPV6_MROUTE
279	bool "IPv6: multicast routing"
280	depends on IPV6
281	select IP_MROUTE_COMMON
282	---help---
283	  Support for IPv6 multicast forwarding.
284	  If unsure, say N.
285
286config IPV6_MROUTE_MULTIPLE_TABLES
287	bool "IPv6: multicast policy routing"
288	depends on IPV6_MROUTE
289	select FIB_RULES
290	help
291	  Normally, a multicast router runs a userspace daemon and decides
292	  what to do with a multicast packet based on the source and
293	  destination addresses. If you say Y here, the multicast router
294	  will also be able to take interfaces and packet marks into
295	  account and run multiple instances of userspace daemons
296	  simultaneously, each one handling a single table.
297
298	  If unsure, say N.
299
300config IPV6_PIMSM_V2
301	bool "IPv6: PIM-SM version 2 support"
302	depends on IPV6_MROUTE
303	---help---
304	  Support for IPv6 PIM multicast routing protocol PIM-SMv2.
305	  If unsure, say N.
306
307config IPV6_SEG6_LWTUNNEL
308	bool "IPv6: Segment Routing Header encapsulation support"
309	depends on IPV6
310	select LWTUNNEL
311	select DST_CACHE
312	select IPV6_MULTIPLE_TABLES
313	---help---
314	  Support for encapsulation of packets within an outer IPv6
315	  header and a Segment Routing Header using the lightweight
316	  tunnels mechanism. Also enable support for advanced local
317	  processing of SRv6 packets based on their active segment.
318
319	  If unsure, say N.
320
321config IPV6_SEG6_HMAC
322	bool "IPv6: Segment Routing HMAC support"
323	depends on IPV6
324	select CRYPTO_HMAC
325	select CRYPTO_SHA1
326	select CRYPTO_SHA256
327	---help---
328	  Support for HMAC signature generation and verification
329	  of SR-enabled packets.
330
331	  If unsure, say N.
332
333config IPV6_SEG6_BPF
334	def_bool y
335	depends on IPV6_SEG6_LWTUNNEL
336	depends on IPV6 = y
337
338endif # IPV6
339