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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	  This is experimental 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	  This is experimental support for optimistic Duplicate
45	  Address Detection.  It allows for autoconfigured addresses
46	  to be used more quickly.
47
48	  If unsure, say N.
49
50config INET6_AH
51	tristate "IPv6: AH transformation"
52	select XFRM_ALGO
53	select CRYPTO
54	select CRYPTO_HMAC
55	select CRYPTO_MD5
56	select CRYPTO_SHA1
57	---help---
58	  Support for IPsec AH.
59
60	  If unsure, say Y.
61
62config INET6_ESP
63	tristate "IPv6: ESP transformation"
64	select XFRM_ALGO
65	select CRYPTO
66	select CRYPTO_AUTHENC
67	select CRYPTO_HMAC
68	select CRYPTO_MD5
69	select CRYPTO_CBC
70	select CRYPTO_SHA1
71	select CRYPTO_DES
72	select CRYPTO_ECHAINIV
73	---help---
74	  Support for IPsec ESP.
75
76	  If unsure, say Y.
77
78config INET6_ESP_OFFLOAD
79	tristate "IPv6: ESP transformation offload"
80	depends on INET6_ESP
81	select XFRM_OFFLOAD
82	default n
83	---help---
84	  Support for ESP transformation offload. This makes sense
85	  only if this system really does IPsec and want to do it
86	  with high throughput. A typical desktop system does not
87	  need it, even if it does IPsec.
88
89	  If unsure, say N.
90
91config INET6_IPCOMP
92	tristate "IPv6: IPComp transformation"
93	select INET6_XFRM_TUNNEL
94	select XFRM_IPCOMP
95	---help---
96	  Support for IP Payload Compression Protocol (IPComp) (RFC3173),
97	  typically needed for IPsec.
98
99	  If unsure, say Y.
100
101config IPV6_MIP6
102	tristate "IPv6: Mobility"
103	select XFRM
104	---help---
105	  Support for IPv6 Mobility described in RFC 3775.
106
107	  If unsure, say N.
108
109config IPV6_ILA
110	tristate "IPv6: Identifier Locator Addressing (ILA)"
111	depends on NETFILTER
112	select DST_CACHE
113	select LWTUNNEL
114	---help---
115	  Support for IPv6 Identifier Locator Addressing (ILA).
116
117	  ILA is a mechanism to do network virtualization without
118	  encapsulation. The basic concept of ILA is that we split an
119	  IPv6 address into a 64 bit locator and 64 bit identifier. The
120	  identifier is the identity of an entity in communication
121	  ("who") and the locator expresses the location of the
122	  entity ("where").
123
124	  ILA can be configured using the "encap ila" option with
125	  "ip -6 route" command. ILA is described in
126	  https://tools.ietf.org/html/draft-herbert-nvo3-ila-00.
127
128	  If unsure, say N.
129
130config INET6_XFRM_TUNNEL
131	tristate
132	select INET6_TUNNEL
133	default n
134
135config INET6_TUNNEL
136	tristate
137	default n
138
139config INET6_XFRM_MODE_TRANSPORT
140	tristate "IPv6: IPsec transport mode"
141	default IPV6
142	select XFRM
143	---help---
144	  Support for IPsec transport mode.
145
146	  If unsure, say Y.
147
148config INET6_XFRM_MODE_TUNNEL
149	tristate "IPv6: IPsec tunnel mode"
150	default IPV6
151	select XFRM
152	---help---
153	  Support for IPsec tunnel mode.
154
155	  If unsure, say Y.
156
157config INET6_XFRM_MODE_BEET
158	tristate "IPv6: IPsec BEET mode"
159	default IPV6
160	select XFRM
161	---help---
162	  Support for IPsec BEET mode.
163
164	  If unsure, say Y.
165
166config INET6_XFRM_MODE_ROUTEOPTIMIZATION
167	tristate "IPv6: MIPv6 route optimization mode"
168	select XFRM
169	---help---
170	  Support for MIPv6 route optimization mode.
171
172config IPV6_VTI
173tristate "Virtual (secure) IPv6: tunneling"
174	select IPV6_TUNNEL
175	select NET_IP_TUNNEL
176	depends on INET6_XFRM_MODE_TUNNEL
177	---help---
178	Tunneling means encapsulating data of one protocol type within
179	another protocol and sending it over a channel that understands the
180	encapsulating protocol. This can be used with xfrm mode tunnel to give
181	the notion of a secure tunnel for IPSEC and then use routing protocol
182	on top.
183
184config IPV6_SIT
185	tristate "IPv6: IPv6-in-IPv4 tunnel (SIT driver)"
186	select INET_TUNNEL
187	select NET_IP_TUNNEL
188	select IPV6_NDISC_NODETYPE
189	default y
190	---help---
191	  Tunneling means encapsulating data of one protocol type within
192	  another protocol and sending it over a channel that understands the
193	  encapsulating protocol. This driver implements encapsulation of IPv6
194	  into IPv4 packets. This is useful if you want to connect two IPv6
195	  networks over an IPv4-only path.
196
197	  Saying M here will produce a module called sit. If unsure, say Y.
198
199config IPV6_SIT_6RD
200	bool "IPv6: IPv6 Rapid Deployment (6RD)"
201	depends on IPV6_SIT
202	default n
203	---help---
204	  IPv6 Rapid Deployment (6rd; draft-ietf-softwire-ipv6-6rd) builds upon
205	  mechanisms of 6to4 (RFC3056) to enable a service provider to rapidly
206	  deploy IPv6 unicast service to IPv4 sites to which it provides
207	  customer premise equipment.  Like 6to4, it utilizes stateless IPv6 in
208	  IPv4 encapsulation in order to transit IPv4-only network
209	  infrastructure.  Unlike 6to4, a 6rd service provider uses an IPv6
210	  prefix of its own in place of the fixed 6to4 prefix.
211
212	  With this option enabled, the SIT driver offers 6rd functionality by
213	  providing additional ioctl API to configure the IPv6 Prefix for in
214	  stead of static 2002::/16 for 6to4.
215
216	  If unsure, say N.
217
218config IPV6_NDISC_NODETYPE
219	bool
220
221config IPV6_TUNNEL
222	tristate "IPv6: IP-in-IPv6 tunnel (RFC2473)"
223	select INET6_TUNNEL
224	select DST_CACHE
225	select GRO_CELLS
226	---help---
227	  Support for IPv6-in-IPv6 and IPv4-in-IPv6 tunnels described in
228	  RFC 2473.
229
230	  If unsure, say N.
231
232config IPV6_GRE
233	tristate "IPv6: GRE tunnel"
234	select IPV6_TUNNEL
235	select NET_IP_TUNNEL
236	depends on NET_IPGRE_DEMUX
237	---help---
238	  Tunneling means encapsulating data of one protocol type within
239	  another protocol and sending it over a channel that understands the
240	  encapsulating protocol. This particular tunneling driver implements
241	  GRE (Generic Routing Encapsulation) and at this time allows
242	  encapsulating of IPv4 or IPv6 over existing IPv6 infrastructure.
243	  This driver is useful if the other endpoint is a Cisco router: Cisco
244	  likes GRE much better than the other Linux tunneling driver ("IP
245	  tunneling" above). In addition, GRE allows multicast redistribution
246	  through the tunnel.
247
248	  Saying M here will produce a module called ip6_gre. If unsure, say N.
249
250config IPV6_FOU
251	tristate
252	default NET_FOU && IPV6
253
254config IPV6_FOU_TUNNEL
255	tristate
256	default NET_FOU_IP_TUNNELS && IPV6_FOU
257	select IPV6_TUNNEL
258
259config IPV6_MULTIPLE_TABLES
260	bool "IPv6: Multiple Routing Tables"
261	select FIB_RULES
262	---help---
263	  Support multiple routing tables.
264
265config IPV6_SUBTREES
266	bool "IPv6: source address based routing"
267	depends on IPV6_MULTIPLE_TABLES
268	---help---
269	  Enable routing by source address or prefix.
270
271	  The destination address is still the primary routing key, so mixing
272	  normal and source prefix specific routes in the same routing table
273	  may sometimes lead to unintended routing behavior.  This can be
274	  avoided by defining different routing tables for the normal and
275	  source prefix specific routes.
276
277	  If unsure, say N.
278
279config IPV6_MROUTE
280	bool "IPv6: multicast routing"
281	depends on IPV6
282	---help---
283	  Experimental 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
333endif # IPV6
334