1 # SPDX-License-Identifier: GPL-2.0-only
6 # IPv6 as module will cause a CRASH if you try to unload it
8 tristate "The IPv6 protocol"
11 Support for IP version 6 (IPv6).
13 For general information about IPv6, see
14 <https://en.wikipedia.org/wiki/IPv6>.
15 For specific information about IPv6 under Linux, see
16 Documentation/networking/ipv6.rst and read the HOWTO at
17 <http://www.tldp.org/HOWTO/Linux+IPv6-HOWTO/>
19 To compile this protocol support as a module, choose M here: the
20 module will be called ipv6.
24 config IPV6_ROUTER_PREF
25 bool "IPv6: Router Preference (RFC 4191) support"
27 Router Preference is an optional extension to the Router
28 Advertisement message which improves the ability of hosts
29 to pick an appropriate router, especially when the hosts
30 are placed in a multi-homed network.
34 config IPV6_ROUTE_INFO
35 bool "IPv6: Route Information (RFC 4191) support"
36 depends on IPV6_ROUTER_PREF
38 Support of Route Information.
42 config IPV6_OPTIMISTIC_DAD
43 bool "IPv6: Enable RFC 4429 Optimistic DAD"
45 Support for optimistic Duplicate Address Detection. It allows for
46 autoconfigured addresses to be used more quickly.
51 tristate "IPv6: AH transformation"
63 tristate "IPv6: ESP transformation"
72 select CRYPTO_ECHAINIV
74 Support for IPsec ESP.
78 config INET6_ESP_OFFLOAD
79 tristate "IPv6: ESP transformation offload"
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.
92 tristate "IPv6: IPComp transformation"
93 select INET6_XFRM_TUNNEL
96 Support for IP Payload Compression Protocol (IPComp) (RFC3173),
97 typically needed for IPsec.
102 tristate "IPv6: Mobility"
105 Support for IPv6 Mobility described in RFC 3775.
110 tristate "IPv6: Identifier Locator Addressing (ILA)"
115 Support for IPv6 Identifier Locator Addressing (ILA).
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
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.
130 config INET6_XFRM_TUNNEL
140 tristate "Virtual (secure) IPv6: tunneling"
145 Tunneling means encapsulating data of one protocol type within
146 another protocol and sending it over a channel that understands the
147 encapsulating protocol. This can be used with xfrm mode tunnel to give
148 the notion of a secure tunnel for IPSEC and then use routing protocol
152 tristate "IPv6: IPv6-in-IPv4 tunnel (SIT driver)"
155 select IPV6_NDISC_NODETYPE
158 Tunneling means encapsulating data of one protocol type within
159 another protocol and sending it over a channel that understands the
160 encapsulating protocol. This driver implements encapsulation of IPv6
161 into IPv4 packets. This is useful if you want to connect two IPv6
162 networks over an IPv4-only path.
164 Saying M here will produce a module called sit. If unsure, say Y.
167 bool "IPv6: IPv6 Rapid Deployment (6RD)"
171 IPv6 Rapid Deployment (6rd; draft-ietf-softwire-ipv6-6rd) builds upon
172 mechanisms of 6to4 (RFC3056) to enable a service provider to rapidly
173 deploy IPv6 unicast service to IPv4 sites to which it provides
174 customer premise equipment. Like 6to4, it utilizes stateless IPv6 in
175 IPv4 encapsulation in order to transit IPv4-only network
176 infrastructure. Unlike 6to4, a 6rd service provider uses an IPv6
177 prefix of its own in place of the fixed 6to4 prefix.
179 With this option enabled, the SIT driver offers 6rd functionality by
180 providing additional ioctl API to configure the IPv6 Prefix for in
181 stead of static 2002::/16 for 6to4.
185 config IPV6_NDISC_NODETYPE
189 tristate "IPv6: IP-in-IPv6 tunnel (RFC2473)"
194 Support for IPv6-in-IPv6 and IPv4-in-IPv6 tunnels described in
200 tristate "IPv6: GRE tunnel"
203 depends on NET_IPGRE_DEMUX
205 Tunneling means encapsulating data of one protocol type within
206 another protocol and sending it over a channel that understands the
207 encapsulating protocol. This particular tunneling driver implements
208 GRE (Generic Routing Encapsulation) and at this time allows
209 encapsulating of IPv4 or IPv6 over existing IPv6 infrastructure.
210 This driver is useful if the other endpoint is a Cisco router: Cisco
211 likes GRE much better than the other Linux tunneling driver ("IP
212 tunneling" above). In addition, GRE allows multicast redistribution
215 Saying M here will produce a module called ip6_gre. If unsure, say N.
219 default NET_FOU && IPV6
221 config IPV6_FOU_TUNNEL
223 default NET_FOU_IP_TUNNELS && IPV6_FOU
226 config IPV6_MULTIPLE_TABLES
227 bool "IPv6: Multiple Routing Tables"
230 Support multiple routing tables.
233 bool "IPv6: source address based routing"
234 depends on IPV6_MULTIPLE_TABLES
236 Enable routing by source address or prefix.
238 The destination address is still the primary routing key, so mixing
239 normal and source prefix specific routes in the same routing table
240 may sometimes lead to unintended routing behavior. This can be
241 avoided by defining different routing tables for the normal and
242 source prefix specific routes.
247 bool "IPv6: multicast routing"
249 select IP_MROUTE_COMMON
251 Support for IPv6 multicast forwarding.
254 config IPV6_MROUTE_MULTIPLE_TABLES
255 bool "IPv6: multicast policy routing"
256 depends on IPV6_MROUTE
259 Normally, a multicast router runs a userspace daemon and decides
260 what to do with a multicast packet based on the source and
261 destination addresses. If you say Y here, the multicast router
262 will also be able to take interfaces and packet marks into
263 account and run multiple instances of userspace daemons
264 simultaneously, each one handling a single table.
269 bool "IPv6: PIM-SM version 2 support"
270 depends on IPV6_MROUTE
272 Support for IPv6 PIM multicast routing protocol PIM-SMv2.
275 config IPV6_SEG6_LWTUNNEL
276 bool "IPv6: Segment Routing Header encapsulation support"
280 select IPV6_MULTIPLE_TABLES
282 Support for encapsulation of packets within an outer IPv6
283 header and a Segment Routing Header using the lightweight
284 tunnels mechanism. Also enable support for advanced local
285 processing of SRv6 packets based on their active segment.
289 config IPV6_SEG6_HMAC
290 bool "IPv6: Segment Routing HMAC support"
296 Support for HMAC signature generation and verification
297 of SR-enabled packets.
303 depends on IPV6_SEG6_LWTUNNEL
306 config IPV6_RPL_LWTUNNEL
307 bool "IPv6: RPL Source Routing Header support"
311 Support for RFC6554 RPL Source Routing Header using the lightweight