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         select DST_CACHE
 211         ---help---
 212           Support for IPv6-in-IPv6 and IPv4-in-IPv6 tunnels described in
 213           RFC 2473.
 214
 215           If unsure, say N.
 216
 217 config IPV6_GRE
 218         tristate "IPv6: GRE tunnel"
 219         select IPV6_TUNNEL
 220         select NET_IP_TUNNEL
 221         depends on NET_IPGRE_DEMUX
 222         ---help---
 223           Tunneling means encapsulating data of one protocol type within
 224           another protocol and sending it over a channel that understands the
 225           encapsulating protocol. This particular tunneling driver implements
 226           GRE (Generic Routing Encapsulation) and at this time allows
 227           encapsulating of IPv4 or IPv6 over existing IPv6 infrastructure.
 228           This driver is useful if the other endpoint is a Cisco router: Cisco
 229           likes GRE much better than the other Linux tunneling driver ("IP
 230           tunneling" above). In addition, GRE allows multicast redistribution
 231           through the tunnel.
 232
 233           Saying M here will produce a module called ip6_gre. If unsure, say N.
 234
 235 config IPV6_FOU
 236         tristate
 237         default NET_FOU && IPV6
 238
 239 config IPV6_FOU_TUNNEL
 240         tristate
 241         default NET_FOU_IP_TUNNELS && IPV6_FOU
 242         select IPV6_TUNNEL
 243
 244 config IPV6_MULTIPLE_TABLES
 245         bool "IPv6: Multiple Routing Tables"
 246         select FIB_RULES
 247         ---help---
 248           Support multiple routing tables.
 249
 250 config IPV6_SUBTREES
 251         bool "IPv6: source address based routing"
 252         depends on IPV6_MULTIPLE_TABLES
 253         ---help---
 254           Enable routing by source address or prefix.
 255
 256           The destination address is still the primary routing key, so mixing
 257           normal and source prefix specific routes in the same routing table
 258           may sometimes lead to unintended routing behavior.  This can be
 259           avoided by defining different routing tables for the normal and
 260           source prefix specific routes.
 261
 262           If unsure, say N.
 263
 264 config IPV6_MROUTE
 265         bool "IPv6: multicast routing"
 266         depends on IPV6
 267         ---help---
 268           Experimental support for IPv6 multicast forwarding.
 269           If unsure, say N.
 270
 271 config IPV6_MROUTE_MULTIPLE_TABLES
 272         bool "IPv6: multicast policy routing"
 273         depends on IPV6_MROUTE
 274         select FIB_RULES
 275         help
 276           Normally, a multicast router runs a userspace daemon and decides
 277           what to do with a multicast packet based on the source and
 278           destination addresses. If you say Y here, the multicast router
 279           will also be able to take interfaces and packet marks into
 280           account and run multiple instances of userspace daemons
 281           simultaneously, each one handling a single table.
 282
 283           If unsure, say N.
 284
 285 config IPV6_PIMSM_V2
 286         bool "IPv6: PIM-SM version 2 support"
 287         depends on IPV6_MROUTE
 288         ---help---
 289           Support for IPv6 PIM multicast routing protocol PIM-SMv2.
 290           If unsure, say N.
 291
 292 config IPV6_SEG6_LWTUNNEL
 293         bool "IPv6: Segment Routing Header encapsulation support"
 294         depends on IPV6
 295         select LWTUNNEL
 296         ---help---
 297           Support for encapsulation of packets within an outer IPv6
 298           header and a Segment Routing Header using the lightweight
 299           tunnels mechanism.
 300
 301           If unsure, say N.
 302
 303 config IPV6_SEG6_INLINE
 304         bool "IPv6: direct Segment Routing Header insertion "
 305         depends on IPV6_SEG6_LWTUNNEL
 306         ---help---
 307           Support for direct insertion of the Segment Routing Header,
 308           also known as inline mode. Be aware that direct insertion of
 309           extension headers (as opposed to encapsulation) may break
 310           multiple mechanisms such as PMTUD or IPSec AH. Use this feature
 311           only if you know exactly what you are doing.
 312
 313           If unsure, say N.
 314
 315 config IPV6_SEG6_HMAC
 316         bool "IPv6: Segment Routing HMAC support"
 317         depends on IPV6
 318         select CRYPTO_HMAC
 319         select CRYPTO_SHA1
 320         select CRYPTO_SHA256
 321         ---help---
 322           Support for HMAC signature generation and verification
 323           of SR-enabled packets.
 324
 325           If unsure, say N.
 326
 327 endif # IPV6