1 #
2 # IPv6 configuration
3 #
4
5 # IPv6 as module will cause a CRASH if you try to unload it
6 menuconfig 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
21 if IPV6
22
23 config 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
33 config 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
41 config 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
49 config 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
61 config 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
77 config 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
90 config 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
100 config 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
108 config 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
129 config INET6_XFRM_TUNNEL
130 tristate
131 select INET6_TUNNEL
132 default n
133
134 config INET6_TUNNEL
135 tristate
136 default n
137
138 config 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
147 config 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
156 config 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
165 config INET6_XFRM_MODE_ROUTEOPTIMIZATION
166 tristate "IPv6: MIPv6 route optimization mode"
167 select XFRM
168 ---help---
169 Support for MIPv6 route optimization mode.
170
171 config IPV6_VTI
172 tristate "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
183 config 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
198 config 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
217 config IPV6_NDISC_NODETYPE
218 bool
219
220 config 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
231 config 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
249 config IPV6_FOU
250 tristate
251 default NET_FOU && IPV6
252
253 config IPV6_FOU_TUNNEL
254 tristate
255 default NET_FOU_IP_TUNNELS && IPV6_FOU
256 select IPV6_TUNNEL
257
258 config IPV6_MULTIPLE_TABLES
259 bool "IPv6: Multiple Routing Tables"
260 select FIB_RULES
261 ---help---
262 Support multiple routing tables.
263
264 config 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
278 config 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
286 config 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
300 config 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
307 config 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
321 config 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
333 endif # IPV6
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