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Linux/net/ipv6/Kconfig

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

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