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_ESP_OFFLOAD
  79         tristate "IPv6: ESP transformation offload"
  80         depends on INET6_ESP
  81         select XFRM_OFFLOAD
  82         default n
  83         ---help---
  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.
  88
  89           If unsure, say N.
  90
  91 config INET6_IPCOMP
  92         tristate "IPv6: IPComp transformation"
  93         select INET6_XFRM_TUNNEL
  94         select XFRM_IPCOMP
  95         ---help---
  96           Support for IP Payload Compression Protocol (IPComp) (RFC3173),
  97           typically needed for IPsec.
  98
  99           If unsure, say Y.
 100
 101 config IPV6_MIP6
 102         tristate "IPv6: Mobility"
 103         select XFRM
 104         ---help---
 105           Support for IPv6 Mobility described in RFC 3775.
 106
 107           If unsure, say N.
 108
 109 config IPV6_ILA
 110         tristate "IPv6: Identifier Locator Addressing (ILA)"
 111         depends on NETFILTER
 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         ---help---
 282           Experimental support for IPv6 multicast forwarding.
 283           If unsure, say N.
 284
 285 config IPV6_MROUTE_MULTIPLE_TABLES
 286         bool "IPv6: multicast policy routing"
 287         depends on IPV6_MROUTE
 288         select FIB_RULES
 289         help
 290           Normally, a multicast router runs a userspace daemon and decides
 291           what to do with a multicast packet based on the source and
 292           destination addresses. If you say Y here, the multicast router
 293           will also be able to take interfaces and packet marks into
 294           account and run multiple instances of userspace daemons
 295           simultaneously, each one handling a single table.
 296
 297           If unsure, say N.
 298
 299 config IPV6_PIMSM_V2
 300         bool "IPv6: PIM-SM version 2 support"
 301         depends on IPV6_MROUTE
 302         ---help---
 303           Support for IPv6 PIM multicast routing protocol PIM-SMv2.
 304           If unsure, say N.
 305
 306 config IPV6_SEG6_LWTUNNEL
 307         bool "IPv6: Segment Routing Header encapsulation support"
 308         depends on IPV6
 309         select LWTUNNEL
 310         select DST_CACHE
 311         select IPV6_MULTIPLE_TABLES
 312         ---help---
 313           Support for encapsulation of packets within an outer IPv6
 314           header and a Segment Routing Header using the lightweight
 315           tunnels mechanism. Also enable support for advanced local
 316           processing of SRv6 packets based on their active segment.
 317
 318           If unsure, say N.
 319
 320 config IPV6_SEG6_HMAC
 321         bool "IPv6: Segment Routing HMAC support"
 322         depends on IPV6
 323         select CRYPTO_HMAC
 324         select CRYPTO_SHA1
 325         select CRYPTO_SHA256
 326         ---help---
 327           Support for HMAC signature generation and verification
 328           of SR-enabled packets.
 329
 330           If unsure, say N.
 331
 332 endif # IPV6