1 # SPDX-License-Identifier: GPL-2.0-only <<
2 # 1 #
3 # IPv6 configuration 2 # IPv6 configuration
4 # 3 #
5 4
6 # IPv6 as module will cause a CRASH if you t 5 # IPv6 as module will cause a CRASH if you try to unload it
7 menuconfig IPV6 6 menuconfig IPV6
8 tristate "The IPv6 protocol" 7 tristate "The IPv6 protocol"
9 default y !! 8 default m
10 select CRYPTO_LIB_SHA1 !! 9 ---help---
11 help !! 10 This is complemental support for the IP version 6.
12 Support for IP version 6 (IPv6). !! 11 You will still be able to do traditional IPv4 networking as well.
13 12
14 For general information about IPv6, 13 For general information about IPv6, see
15 <https://en.wikipedia.org/wiki/IPv6> 14 <https://en.wikipedia.org/wiki/IPv6>.
16 For specific information about IPv6 !! 15 For Linux IPv6 development information, see <http://www.linux-ipv6.org>.
17 Documentation/networking/ipv6.rst an !! 16 For specific information about IPv6 under Linux, read the HOWTO at
18 <https://www.tldp.org/HOWTO/Linux+IP !! 17 <http://www.bieringer.de/linux/IPv6/>.
19 18
20 To compile this protocol support as !! 19 To compile this protocol support as a module, choose M here: the
21 module will be called ipv6. 20 module will be called ipv6.
22 21
23 if IPV6 22 if IPV6
24 23
>> 24 config IPV6_PRIVACY
>> 25 bool "IPv6: Privacy Extensions (RFC 3041) support"
>> 26 ---help---
>> 27 Privacy Extensions for Stateless Address Autoconfiguration in IPv6
>> 28 support. With this option, additional periodically-altered
>> 29 pseudo-random global-scope unicast address(es) will be assigned to
>> 30 your interface(s).
>> 31
>> 32 We use our standard pseudo-random algorithm to generate the
>> 33 randomized interface identifier, instead of one described in RFC 3041.
>> 34
>> 35 By default the kernel does not generate temporary addresses.
>> 36 To use temporary addresses, do
>> 37
>> 38 echo 2 >/proc/sys/net/ipv6/conf/all/use_tempaddr
>> 39
>> 40 See <file:Documentation/networking/ip-sysctl.txt> for details.
>> 41
25 config IPV6_ROUTER_PREF 42 config IPV6_ROUTER_PREF
26 bool "IPv6: Router Preference (RFC 419 43 bool "IPv6: Router Preference (RFC 4191) support"
27 help !! 44 ---help---
28 Router Preference is an optional ext 45 Router Preference is an optional extension to the Router
29 Advertisement message which improves 46 Advertisement message which improves the ability of hosts
30 to pick an appropriate router, espec 47 to pick an appropriate router, especially when the hosts
31 are placed in a multi-homed network. 48 are placed in a multi-homed network.
32 49
33 If unsure, say N. 50 If unsure, say N.
34 51
35 config IPV6_ROUTE_INFO 52 config IPV6_ROUTE_INFO
36 bool "IPv6: Route Information (RFC 419 53 bool "IPv6: Route Information (RFC 4191) support"
37 depends on IPV6_ROUTER_PREF 54 depends on IPV6_ROUTER_PREF
38 help !! 55 ---help---
39 Support of Route Information. !! 56 This is experimental support of Route Information.
40 57
41 If unsure, say N. 58 If unsure, say N.
42 59
43 config IPV6_OPTIMISTIC_DAD 60 config IPV6_OPTIMISTIC_DAD
44 bool "IPv6: Enable RFC 4429 Optimistic 61 bool "IPv6: Enable RFC 4429 Optimistic DAD"
45 help !! 62 ---help---
46 Support for optimistic Duplicate Add !! 63 This is experimental support for optimistic Duplicate
47 autoconfigured addresses to be used !! 64 Address Detection. It allows for autoconfigured addresses
>> 65 to be used more quickly.
48 66
49 If unsure, say N. 67 If unsure, say N.
50 68
51 config INET6_AH 69 config INET6_AH
52 tristate "IPv6: AH transformation" 70 tristate "IPv6: AH transformation"
53 select XFRM_AH !! 71 select XFRM_ALGO
54 help !! 72 select CRYPTO
55 Support for IPsec AH (Authentication !! 73 select CRYPTO_HMAC
56 !! 74 select CRYPTO_MD5
57 AH can be used with various authenti !! 75 select CRYPTO_SHA1
58 enabling AH support itself, this opt !! 76 ---help---
59 implementations of the algorithms th !! 77 Support for IPsec AH.
60 implemented. If you need any other <<
61 them in the crypto API. You should <<
62 implementations of any needed algori <<
63 78
64 If unsure, say Y. 79 If unsure, say Y.
65 80
66 config INET6_ESP 81 config INET6_ESP
67 tristate "IPv6: ESP transformation" 82 tristate "IPv6: ESP transformation"
68 select XFRM_ESP !! 83 select XFRM_ALGO
69 help !! 84 select CRYPTO
70 Support for IPsec ESP (Encapsulating !! 85 select CRYPTO_AUTHENC
71 !! 86 select CRYPTO_HMAC
72 ESP can be used with various encrypt !! 87 select CRYPTO_MD5
73 Besides enabling ESP support itself, !! 88 select CRYPTO_CBC
74 implementations of the algorithms th !! 89 select CRYPTO_SHA1
75 implemented. If you need any other !! 90 select CRYPTO_DES
76 them in the crypto API. You should !! 91 ---help---
77 implementations of any needed algori !! 92 Support for IPsec ESP.
78 93
79 If unsure, say Y. 94 If unsure, say Y.
80 95
81 config INET6_ESP_OFFLOAD <<
82 tristate "IPv6: ESP transformation off <<
83 depends on INET6_ESP <<
84 select XFRM_OFFLOAD <<
85 default n <<
86 help <<
87 Support for ESP transformation offlo <<
88 only if this system really does IPse <<
89 with high throughput. A typical desk <<
90 need it, even if it does IPsec. <<
91 <<
92 If unsure, say N. <<
93 <<
94 config INET6_ESPINTCP <<
95 bool "IPv6: ESP in TCP encapsulation ( <<
96 depends on XFRM && INET6_ESP <<
97 select STREAM_PARSER <<
98 select NET_SOCK_MSG <<
99 select XFRM_ESPINTCP <<
100 help <<
101 Support for RFC 8229 encapsulation o <<
102 TCP/IPv6 sockets. <<
103 <<
104 If unsure, say N. <<
105 <<
106 config INET6_IPCOMP 96 config INET6_IPCOMP
107 tristate "IPv6: IPComp transformation" 97 tristate "IPv6: IPComp transformation"
108 select INET6_XFRM_TUNNEL 98 select INET6_XFRM_TUNNEL
109 select XFRM_IPCOMP 99 select XFRM_IPCOMP
110 help !! 100 ---help---
111 Support for IP Payload Compression P 101 Support for IP Payload Compression Protocol (IPComp) (RFC3173),
112 typically needed for IPsec. 102 typically needed for IPsec.
113 103
114 If unsure, say Y. 104 If unsure, say Y.
115 105
116 config IPV6_MIP6 106 config IPV6_MIP6
117 tristate "IPv6: Mobility" 107 tristate "IPv6: Mobility"
118 select XFRM 108 select XFRM
119 help !! 109 ---help---
120 Support for IPv6 Mobility described 110 Support for IPv6 Mobility described in RFC 3775.
121 111
122 If unsure, say N. 112 If unsure, say N.
123 113
124 config IPV6_ILA <<
125 tristate "IPv6: Identifier Locator Add <<
126 depends on NETFILTER <<
127 select DST_CACHE <<
128 select LWTUNNEL <<
129 help <<
130 Support for IPv6 Identifier Locator <<
131 <<
132 ILA is a mechanism to do network vir <<
133 encapsulation. The basic concept of <<
134 IPv6 address into a 64 bit locator a <<
135 identifier is the identity of an ent <<
136 ("who") and the locator expresses th <<
137 entity ("where"). <<
138 <<
139 ILA can be configured using the "enc <<
140 "ip -6 route" command. ILA is descri <<
141 https://tools.ietf.org/html/draft-he <<
142 <<
143 If unsure, say N. <<
144 <<
145 config INET6_XFRM_TUNNEL 114 config INET6_XFRM_TUNNEL
146 tristate 115 tristate
147 select INET6_TUNNEL 116 select INET6_TUNNEL
148 default n 117 default n
149 118
150 config INET6_TUNNEL 119 config INET6_TUNNEL
151 tristate 120 tristate
152 default n 121 default n
153 122
154 config IPV6_VTI !! 123 config INET6_XFRM_MODE_TRANSPORT
155 tristate "Virtual (secure) IPv6: tunne !! 124 tristate "IPv6: IPsec transport mode"
156 select IPV6_TUNNEL !! 125 default IPV6
157 select NET_IP_TUNNEL <<
158 select XFRM 126 select XFRM
159 help !! 127 ---help---
160 Tunneling means encapsulating data of !! 128 Support for IPsec transport mode.
161 another protocol and sending it over a !! 129
162 encapsulating protocol. This can be us !! 130 If unsure, say Y.
163 the notion of a secure tunnel for IPSE !! 131
164 on top. !! 132 config 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
>> 141 config 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
>> 150 config INET6_XFRM_MODE_ROUTEOPTIMIZATION
>> 151 tristate "IPv6: MIPv6 route optimization mode"
>> 152 select XFRM
>> 153 ---help---
>> 154 Support for MIPv6 route optimization mode.
165 155
166 config IPV6_SIT 156 config IPV6_SIT
167 tristate "IPv6: IPv6-in-IPv4 tunnel (S 157 tristate "IPv6: IPv6-in-IPv4 tunnel (SIT driver)"
168 select INET_TUNNEL 158 select INET_TUNNEL
169 select NET_IP_TUNNEL 159 select NET_IP_TUNNEL
170 select IPV6_NDISC_NODETYPE 160 select IPV6_NDISC_NODETYPE
171 default y 161 default y
172 help !! 162 ---help---
173 Tunneling means encapsulating data o 163 Tunneling means encapsulating data of one protocol type within
174 another protocol and sending it over 164 another protocol and sending it over a channel that understands the
175 encapsulating protocol. This driver 165 encapsulating protocol. This driver implements encapsulation of IPv6
176 into IPv4 packets. This is useful if 166 into IPv4 packets. This is useful if you want to connect two IPv6
177 networks over an IPv4-only path. 167 networks over an IPv4-only path.
178 168
179 Saying M here will produce a module 169 Saying M here will produce a module called sit. If unsure, say Y.
180 170
181 config IPV6_SIT_6RD 171 config IPV6_SIT_6RD
182 bool "IPv6: IPv6 Rapid Deployment (6RD 172 bool "IPv6: IPv6 Rapid Deployment (6RD)"
183 depends on IPV6_SIT 173 depends on IPV6_SIT
184 default n 174 default n
185 help !! 175 ---help---
186 IPv6 Rapid Deployment (6rd; draft-ie 176 IPv6 Rapid Deployment (6rd; draft-ietf-softwire-ipv6-6rd) builds upon
187 mechanisms of 6to4 (RFC3056) to enab 177 mechanisms of 6to4 (RFC3056) to enable a service provider to rapidly
188 deploy IPv6 unicast service to IPv4 178 deploy IPv6 unicast service to IPv4 sites to which it provides
189 customer premise equipment. Like 6t 179 customer premise equipment. Like 6to4, it utilizes stateless IPv6 in
190 IPv4 encapsulation in order to trans 180 IPv4 encapsulation in order to transit IPv4-only network
191 infrastructure. Unlike 6to4, a 6rd 181 infrastructure. Unlike 6to4, a 6rd service provider uses an IPv6
192 prefix of its own in place of the fi 182 prefix of its own in place of the fixed 6to4 prefix.
193 183
194 With this option enabled, the SIT dr 184 With this option enabled, the SIT driver offers 6rd functionality by
195 providing additional ioctl API to co 185 providing additional ioctl API to configure the IPv6 Prefix for in
196 stead of static 2002::/16 for 6to4. 186 stead of static 2002::/16 for 6to4.
197 187
198 If unsure, say N. 188 If unsure, say N.
199 189
200 config IPV6_NDISC_NODETYPE 190 config IPV6_NDISC_NODETYPE
201 bool 191 bool
202 192
203 config IPV6_TUNNEL 193 config IPV6_TUNNEL
204 tristate "IPv6: IP-in-IPv6 tunnel (RFC 194 tristate "IPv6: IP-in-IPv6 tunnel (RFC2473)"
205 select INET6_TUNNEL 195 select INET6_TUNNEL
206 select DST_CACHE !! 196 ---help---
207 select GRO_CELLS <<
208 help <<
209 Support for IPv6-in-IPv6 and IPv4-in 197 Support for IPv6-in-IPv6 and IPv4-in-IPv6 tunnels described in
210 RFC 2473. 198 RFC 2473.
211 199
212 If unsure, say N. 200 If unsure, say N.
213 201
214 config IPV6_GRE 202 config IPV6_GRE
215 tristate "IPv6: GRE tunnel" 203 tristate "IPv6: GRE tunnel"
216 select IPV6_TUNNEL 204 select IPV6_TUNNEL
217 select NET_IP_TUNNEL 205 select NET_IP_TUNNEL
218 depends on NET_IPGRE_DEMUX !! 206 ---help---
219 help <<
220 Tunneling means encapsulating data o 207 Tunneling means encapsulating data of one protocol type within
221 another protocol and sending it over 208 another protocol and sending it over a channel that understands the
222 encapsulating protocol. This particu 209 encapsulating protocol. This particular tunneling driver implements
223 GRE (Generic Routing Encapsulation) 210 GRE (Generic Routing Encapsulation) and at this time allows
224 encapsulating of IPv4 or IPv6 over e 211 encapsulating of IPv4 or IPv6 over existing IPv6 infrastructure.
225 This driver is useful if the other e 212 This driver is useful if the other endpoint is a Cisco router: Cisco
226 likes GRE much better than the other 213 likes GRE much better than the other Linux tunneling driver ("IP
227 tunneling" above). In addition, GRE 214 tunneling" above). In addition, GRE allows multicast redistribution
228 through the tunnel. 215 through the tunnel.
229 216
230 Saying M here will produce a module 217 Saying M here will produce a module called ip6_gre. If unsure, say N.
231 218
232 config IPV6_FOU <<
233 tristate <<
234 default NET_FOU && IPV6 <<
235 <<
236 config IPV6_FOU_TUNNEL <<
237 tristate <<
238 default NET_FOU_IP_TUNNELS && IPV6_FOU <<
239 select IPV6_TUNNEL <<
240 <<
241 config IPV6_MULTIPLE_TABLES 219 config IPV6_MULTIPLE_TABLES
242 bool "IPv6: Multiple Routing Tables" 220 bool "IPv6: Multiple Routing Tables"
243 select FIB_RULES 221 select FIB_RULES
244 help !! 222 ---help---
245 Support multiple routing tables. 223 Support multiple routing tables.
246 224
247 config IPV6_SUBTREES 225 config IPV6_SUBTREES
248 bool "IPv6: source address based routi 226 bool "IPv6: source address based routing"
249 depends on IPV6_MULTIPLE_TABLES 227 depends on IPV6_MULTIPLE_TABLES
250 help !! 228 ---help---
251 Enable routing by source address or 229 Enable routing by source address or prefix.
252 230
253 The destination address is still the 231 The destination address is still the primary routing key, so mixing
254 normal and source prefix specific ro 232 normal and source prefix specific routes in the same routing table
255 may sometimes lead to unintended rou 233 may sometimes lead to unintended routing behavior. This can be
256 avoided by defining different routin 234 avoided by defining different routing tables for the normal and
257 source prefix specific routes. 235 source prefix specific routes.
258 236
259 If unsure, say N. 237 If unsure, say N.
260 238
261 config IPV6_MROUTE 239 config IPV6_MROUTE
262 bool "IPv6: multicast routing" 240 bool "IPv6: multicast routing"
263 depends on IPV6 241 depends on IPV6
264 select IP_MROUTE_COMMON !! 242 ---help---
265 help !! 243 Experimental support for IPv6 multicast forwarding.
266 Support for IPv6 multicast forwardin <<
267 If unsure, say N. 244 If unsure, say N.
268 245
269 config IPV6_MROUTE_MULTIPLE_TABLES 246 config IPV6_MROUTE_MULTIPLE_TABLES
270 bool "IPv6: multicast policy routing" 247 bool "IPv6: multicast policy routing"
271 depends on IPV6_MROUTE 248 depends on IPV6_MROUTE
272 select FIB_RULES 249 select FIB_RULES
273 help 250 help
274 Normally, a multicast router runs a 251 Normally, a multicast router runs a userspace daemon and decides
275 what to do with a multicast packet b 252 what to do with a multicast packet based on the source and
276 destination addresses. If you say Y 253 destination addresses. If you say Y here, the multicast router
277 will also be able to take interfaces 254 will also be able to take interfaces and packet marks into
278 account and run multiple instances o 255 account and run multiple instances of userspace daemons
279 simultaneously, each one handling a 256 simultaneously, each one handling a single table.
280 257
281 If unsure, say N. 258 If unsure, say N.
282 259
283 config IPV6_PIMSM_V2 260 config IPV6_PIMSM_V2
284 bool "IPv6: PIM-SM version 2 support" 261 bool "IPv6: PIM-SM version 2 support"
285 depends on IPV6_MROUTE 262 depends on IPV6_MROUTE
286 help !! 263 ---help---
287 Support for IPv6 PIM multicast routi 264 Support for IPv6 PIM multicast routing protocol PIM-SMv2.
288 If unsure, say N. <<
289 <<
290 config IPV6_SEG6_LWTUNNEL <<
291 bool "IPv6: Segment Routing Header enc <<
292 depends on IPV6 <<
293 select LWTUNNEL <<
294 select DST_CACHE <<
295 select IPV6_MULTIPLE_TABLES <<
296 help <<
297 Support for encapsulation of packets <<
298 header and a Segment Routing Header <<
299 tunnels mechanism. Also enable suppo <<
300 processing of SRv6 packets based on <<
301 <<
302 If unsure, say N. <<
303 <<
304 config IPV6_SEG6_HMAC <<
305 bool "IPv6: Segment Routing HMAC suppo <<
306 depends on IPV6 <<
307 select CRYPTO <<
308 select CRYPTO_HMAC <<
309 select CRYPTO_SHA1 <<
310 select CRYPTO_SHA256 <<
311 help <<
312 Support for HMAC signature generatio <<
313 of SR-enabled packets. <<
314 <<
315 If unsure, say N. <<
316 <<
317 config IPV6_SEG6_BPF <<
318 def_bool y <<
319 depends on IPV6_SEG6_LWTUNNEL <<
320 depends on IPV6 = y <<
321 <<
322 config IPV6_RPL_LWTUNNEL <<
323 bool "IPv6: RPL Source Routing Header <<
324 depends on IPV6 <<
325 select LWTUNNEL <<
326 select DST_CACHE <<
327 help <<
328 Support for RFC6554 RPL Source Routi <<
329 tunnels mechanism. <<
330 <<
331 If unsure, say N. <<
332 <<
333 config IPV6_IOAM6_LWTUNNEL <<
334 bool "IPv6: IOAM Pre-allocated Trace i <<
335 depends on IPV6 <<
336 select LWTUNNEL <<
337 select DST_CACHE <<
338 help <<
339 Support for the insertion of IOAM Pr <<
340 Header using the lightweight tunnels <<
341 <<
342 If unsure, say N. 265 If unsure, say N.
343 266
344 endif # IPV6 267 endif # IPV6
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