xref: /openbmc/linux/net/ipv6/Kconfig (revision 4f38b9f2)
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	---help---
73	  Support for IPsec ESP.
74
75	  If unsure, say Y.
76
77config INET6_IPCOMP
78	tristate "IPv6: IPComp transformation"
79	select INET6_XFRM_TUNNEL
80	select XFRM_IPCOMP
81	---help---
82	  Support for IP Payload Compression Protocol (IPComp) (RFC3173),
83	  typically needed for IPsec.
84
85	  If unsure, say Y.
86
87config IPV6_MIP6
88	tristate "IPv6: Mobility"
89	select XFRM
90	---help---
91	  Support for IPv6 Mobility described in RFC 3775.
92
93	  If unsure, say N.
94
95config IPV6_ILA
96	tristate "IPv6: Identifier Locator Addressing (ILA)"
97	select LWTUNNEL
98	---help---
99	  Support for IPv6 Identifier Locator Addressing (ILA).
100
101	  ILA is a mechanism to do network virtualization without
102	  encapsulation. The basic concept of ILA is that we split an
103	  IPv6 address into a 64 bit locator and 64 bit identifier. The
104	  identifier is the identity of an entity in communication
105	  ("who") and the locator expresses the location of the
106	  entity ("where").
107
108	  ILA can be configured using the "encap ila" option with
109	  "ip -6 route" command. ILA is described in
110	  https://tools.ietf.org/html/draft-herbert-nvo3-ila-00.
111
112	  If unsure, say N.
113
114config INET6_XFRM_TUNNEL
115	tristate
116	select INET6_TUNNEL
117	default n
118
119config INET6_TUNNEL
120	tristate
121	default n
122
123config INET6_XFRM_MODE_TRANSPORT
124	tristate "IPv6: IPsec transport mode"
125	default IPV6
126	select XFRM
127	---help---
128	  Support for IPsec transport mode.
129
130	  If unsure, say Y.
131
132config INET6_XFRM_MODE_TUNNEL
133	tristate "IPv6: IPsec tunnel mode"
134	default IPV6
135	select XFRM
136	---help---
137	  Support for IPsec tunnel mode.
138
139	  If unsure, say Y.
140
141config INET6_XFRM_MODE_BEET
142	tristate "IPv6: IPsec BEET mode"
143	default IPV6
144	select XFRM
145	---help---
146	  Support for IPsec BEET mode.
147
148	  If unsure, say Y.
149
150config INET6_XFRM_MODE_ROUTEOPTIMIZATION
151	tristate "IPv6: MIPv6 route optimization mode"
152	select XFRM
153	---help---
154	  Support for MIPv6 route optimization mode.
155
156config IPV6_VTI
157tristate "Virtual (secure) IPv6: tunneling"
158	select IPV6_TUNNEL
159	select NET_IP_TUNNEL
160	depends on INET6_XFRM_MODE_TUNNEL
161	---help---
162	Tunneling means encapsulating data of one protocol type within
163	another protocol and sending it over a channel that understands the
164	encapsulating protocol. This can be used with xfrm mode tunnel to give
165	the notion of a secure tunnel for IPSEC and then use routing protocol
166	on top.
167
168config IPV6_SIT
169	tristate "IPv6: IPv6-in-IPv4 tunnel (SIT driver)"
170	select INET_TUNNEL
171	select NET_IP_TUNNEL
172	select IPV6_NDISC_NODETYPE
173	default y
174	---help---
175	  Tunneling means encapsulating data of one protocol type within
176	  another protocol and sending it over a channel that understands the
177	  encapsulating protocol. This driver implements encapsulation of IPv6
178	  into IPv4 packets. This is useful if you want to connect two IPv6
179	  networks over an IPv4-only path.
180
181	  Saying M here will produce a module called sit. If unsure, say Y.
182
183config IPV6_SIT_6RD
184	bool "IPv6: IPv6 Rapid Deployment (6RD)"
185	depends on IPV6_SIT
186	default n
187	---help---
188	  IPv6 Rapid Deployment (6rd; draft-ietf-softwire-ipv6-6rd) builds upon
189	  mechanisms of 6to4 (RFC3056) to enable a service provider to rapidly
190	  deploy IPv6 unicast service to IPv4 sites to which it provides
191	  customer premise equipment.  Like 6to4, it utilizes stateless IPv6 in
192	  IPv4 encapsulation in order to transit IPv4-only network
193	  infrastructure.  Unlike 6to4, a 6rd service provider uses an IPv6
194	  prefix of its own in place of the fixed 6to4 prefix.
195
196	  With this option enabled, the SIT driver offers 6rd functionality by
197	  providing additional ioctl API to configure the IPv6 Prefix for in
198	  stead of static 2002::/16 for 6to4.
199
200	  If unsure, say N.
201
202config IPV6_NDISC_NODETYPE
203	bool
204
205config IPV6_TUNNEL
206	tristate "IPv6: IP-in-IPv6 tunnel (RFC2473)"
207	select INET6_TUNNEL
208	---help---
209	  Support for IPv6-in-IPv6 and IPv4-in-IPv6 tunnels described in
210	  RFC 2473.
211
212	  If unsure, say N.
213
214config IPV6_GRE
215	tristate "IPv6: GRE tunnel"
216	select IPV6_TUNNEL
217	select NET_IP_TUNNEL
218	---help---
219	  Tunneling means encapsulating data of one protocol type within
220	  another protocol and sending it over a channel that understands the
221	  encapsulating protocol. This particular tunneling driver implements
222	  GRE (Generic Routing Encapsulation) and at this time allows
223	  encapsulating of IPv4 or IPv6 over existing IPv6 infrastructure.
224	  This driver is useful if the other endpoint is a Cisco router: Cisco
225	  likes GRE much better than the other Linux tunneling driver ("IP
226	  tunneling" above). In addition, GRE allows multicast redistribution
227	  through the tunnel.
228
229	  Saying M here will produce a module called ip6_gre. If unsure, say N.
230
231config IPV6_MULTIPLE_TABLES
232	bool "IPv6: Multiple Routing Tables"
233	select FIB_RULES
234	---help---
235	  Support multiple routing tables.
236
237config IPV6_SUBTREES
238	bool "IPv6: source address based routing"
239	depends on IPV6_MULTIPLE_TABLES
240	---help---
241	  Enable routing by source address or prefix.
242
243	  The destination address is still the primary routing key, so mixing
244	  normal and source prefix specific routes in the same routing table
245	  may sometimes lead to unintended routing behavior.  This can be
246	  avoided by defining different routing tables for the normal and
247	  source prefix specific routes.
248
249	  If unsure, say N.
250
251config IPV6_MROUTE
252	bool "IPv6: multicast routing"
253	depends on IPV6
254	---help---
255	  Experimental support for IPv6 multicast forwarding.
256	  If unsure, say N.
257
258config IPV6_MROUTE_MULTIPLE_TABLES
259	bool "IPv6: multicast policy routing"
260	depends on IPV6_MROUTE
261	select FIB_RULES
262	help
263	  Normally, a multicast router runs a userspace daemon and decides
264	  what to do with a multicast packet based on the source and
265	  destination addresses. If you say Y here, the multicast router
266	  will also be able to take interfaces and packet marks into
267	  account and run multiple instances of userspace daemons
268	  simultaneously, each one handling a single table.
269
270	  If unsure, say N.
271
272config IPV6_PIMSM_V2
273	bool "IPv6: PIM-SM version 2 support"
274	depends on IPV6_MROUTE
275	---help---
276	  Support for IPv6 PIM multicast routing protocol PIM-SMv2.
277	  If unsure, say N.
278
279endif # IPV6
280