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 DST_CACHE
 113         select LWTUNNEL
 114         ---help---
 115           Support for IPv6 Identifier Locator Addressing (ILA).
 116
 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
 122           entity ("where").
 123
 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.
 127
 128           If unsure, say N.
 129
 130 config INET6_XFRM_TUNNEL
 131         tristate
 132         select INET6_TUNNEL
 133         default n
 134
 135 config INET6_TUNNEL
 136         tristate
 137         default n
 138
 139 config INET6_XFRM_MODE_TRANSPORT
 140         tristate "IPv6: IPsec transport mode"
 141         default IPV6
 142         select XFRM
 143         ---help---
 144           Support for IPsec transport mode.
 145
 146           If unsure, say Y.
 147
 148 config INET6_XFRM_MODE_TUNNEL
 149         tristate "IPv6: IPsec tunnel mode"
 150         default IPV6
 151         select XFRM
 152         ---help---
 153           Support for IPsec tunnel mode.
 154
 155           If unsure, say Y.
 156
 157 config INET6_XFRM_MODE_BEET
 158         tristate "IPv6: IPsec BEET mode"
 159         default IPV6
 160         select XFRM
 161         ---help---
 162           Support for IPsec BEET mode.
 163
 164           If unsure, say Y.
 165
 166 config INET6_XFRM_MODE_ROUTEOPTIMIZATION
 167         tristate "IPv6: MIPv6 route optimization mode"
 168         select XFRM
 169         ---help---
 170           Support for MIPv6 route optimization mode.
 171
 172 config IPV6_VTI
 173 tristate "Virtual (secure) IPv6: tunneling"
 174         select IPV6_TUNNEL
 175         select NET_IP_TUNNEL
 176         depends on INET6_XFRM_MODE_TUNNEL
 177         ---help---
 178         Tunneling means encapsulating data of one protocol type within
 179         another protocol and sending it over a channel that understands the
 180         encapsulating protocol. This can be used with xfrm mode tunnel to give
 181         the notion of a secure tunnel for IPSEC and then use routing protocol
 182         on top.
 183
 184 config IPV6_SIT
 185         tristate "IPv6: IPv6-in-IPv4 tunnel (SIT driver)"
 186         select INET_TUNNEL
 187         select NET_IP_TUNNEL
 188         select IPV6_NDISC_NODETYPE
 189         default y
 190         ---help---
 191           Tunneling means encapsulating data of one protocol type within
 192           another protocol and sending it over a channel that understands the
 193           encapsulating protocol. This driver implements encapsulation of IPv6
 194           into IPv4 packets. This is useful if you want to connect two IPv6
 195           networks over an IPv4-only path.
 196
 197           Saying M here will produce a module called sit. If unsure, say Y.
 198
 199 config IPV6_SIT_6RD
 200         bool "IPv6: IPv6 Rapid Deployment (6RD)"
 201         depends on IPV6_SIT
 202         default n
 203         ---help---
 204           IPv6 Rapid Deployment (6rd; draft-ietf-softwire-ipv6-6rd) builds upon
 205           mechanisms of 6to4 (RFC3056) to enable a service provider to rapidly
 206           deploy IPv6 unicast service to IPv4 sites to which it provides
 207           customer premise equipment.  Like 6to4, it utilizes stateless IPv6 in
 208           IPv4 encapsulation in order to transit IPv4-only network
 209           infrastructure.  Unlike 6to4, a 6rd service provider uses an IPv6
 210           prefix of its own in place of the fixed 6to4 prefix.
 211
 212           With this option enabled, the SIT driver offers 6rd functionality by
 213           providing additional ioctl API to configure the IPv6 Prefix for in
 214           stead of static 2002::/16 for 6to4.
 215
 216           If unsure, say N.
 217
 218 config IPV6_NDISC_NODETYPE
 219         bool
 220
 221 config IPV6_TUNNEL
 222         tristate "IPv6: IP-in-IPv6 tunnel (RFC2473)"
 223         select INET6_TUNNEL
 224         select DST_CACHE
 225         select GRO_CELLS
 226         ---help---
 227           Support for IPv6-in-IPv6 and IPv4-in-IPv6 tunnels described in
 228           RFC 2473.
 229
 230           If unsure, say N.
 231
 232 config IPV6_GRE
 233         tristate "IPv6: GRE tunnel"
 234         select IPV6_TUNNEL
 235         select NET_IP_TUNNEL
 236         depends on NET_IPGRE_DEMUX
 237         ---help---
 238           Tunneling means encapsulating data of one protocol type within
 239           another protocol and sending it over a channel that understands the
 240           encapsulating protocol. This particular tunneling driver implements
 241           GRE (Generic Routing Encapsulation) and at this time allows
 242           encapsulating of IPv4 or IPv6 over existing IPv6 infrastructure.
 243           This driver is useful if the other endpoint is a Cisco router: Cisco
 244           likes GRE much better than the other Linux tunneling driver ("IP
 245           tunneling" above). In addition, GRE allows multicast redistribution
 246           through the tunnel.
 247
 248           Saying M here will produce a module called ip6_gre. If unsure, say N.
 249
 250 config IPV6_FOU
 251         tristate
 252         default NET_FOU && IPV6
 253
 254 config IPV6_FOU_TUNNEL
 255         tristate
 256         default NET_FOU_IP_TUNNELS && IPV6_FOU
 257         select IPV6_TUNNEL
 258
 259 config IPV6_MULTIPLE_TABLES
 260         bool "IPv6: Multiple Routing Tables"
 261         select FIB_RULES
 262         ---help---
 263           Support multiple routing tables.
 264
 265 config IPV6_SUBTREES
 266         bool "IPv6: source address based routing"
 267         depends on IPV6_MULTIPLE_TABLES
 268         ---help---
 269           Enable routing by source address or prefix.
 270
 271           The destination address is still the primary routing key, so mixing
 272           normal and source prefix specific routes in the same routing table
 273           may sometimes lead to unintended routing behavior.  This can be
 274           avoided by defining different routing tables for the normal and
 275           source prefix specific routes.
 276
 277           If unsure, say N.
 278
 279 config IPV6_MROUTE
 280         bool "IPv6: multicast routing"
 281         depends on IPV6
 282         ---help---
 283           Experimental support for IPv6 multicast forwarding.
 284           If unsure, say N.
 285
 286 config IPV6_MROUTE_MULTIPLE_TABLES
 287         bool "IPv6: multicast policy routing"
 288         depends on IPV6_MROUTE
 289         select FIB_RULES
 290         help
 291           Normally, a multicast router runs a userspace daemon and decides
 292           what to do with a multicast packet based on the source and
 293           destination addresses. If you say Y here, the multicast router
 294           will also be able to take interfaces and packet marks into
 295           account and run multiple instances of userspace daemons
 296           simultaneously, each one handling a single table.
 297
 298           If unsure, say N.
 299
 300 config IPV6_PIMSM_V2
 301         bool "IPv6: PIM-SM version 2 support"
 302         depends on IPV6_MROUTE
 303         ---help---
 304           Support for IPv6 PIM multicast routing protocol PIM-SMv2.
 305           If unsure, say N.
 306
 307 config IPV6_SEG6_LWTUNNEL
 308         bool "IPv6: Segment Routing Header encapsulation support"
 309         depends on IPV6
 310         select LWTUNNEL
 311         select DST_CACHE
 312         select IPV6_MULTIPLE_TABLES
 313         ---help---
 314           Support for encapsulation of packets within an outer IPv6
 315           header and a Segment Routing Header using the lightweight
 316           tunnels mechanism. Also enable support for advanced local
 317           processing of SRv6 packets based on their active segment.
 318
 319           If unsure, say N.
 320
 321 config IPV6_SEG6_HMAC
 322         bool "IPv6: Segment Routing HMAC support"
 323         depends on IPV6
 324         select CRYPTO_HMAC
 325         select CRYPTO_SHA1
 326         select CRYPTO_SHA256
 327         ---help---
 328           Support for HMAC signature generation and verification
 329           of SR-enabled packets.
 330
 331           If unsure, say N.
 332
 333 endif # IPV6