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         ---help---
  73           Support for IPsec ESP.
  74
  75           If unsure, say Y.
  76
  77 config INET6_IPCOMP
  78         tristate "IPv6: IPComp transformation"
  79         select INET6_XFRM_TUNNEL
  80         select XFRM_IPCOMP
  81         ---help---
  82           Support for IP Payload Compression Protocol (IPComp) (RFC3173),
  83           typically needed for IPsec.
  84
  85           If unsure, say Y.
  86
  87 config IPV6_MIP6
  88         tristate "IPv6: Mobility"
  89         select XFRM
  90         ---help---
  91           Support for IPv6 Mobility described in RFC 3775.
  92
  93           If unsure, say N.
  94
  95 config IPV6_ILA
  96         tristate "IPv6: Identifier Locator Addressing (ILA)"
  97         select LWTUNNEL
  98         ---help---
  99           Support for IPv6 Identifier Locator Addressing (ILA).
 100
 101           ILA is a mechanism to do network virtualization without
 102           encapsulation. The basic concept of ILA is that we split an
 103           IPv6 address into a 64 bit locator and 64 bit identifier. The
 104           identifier is the identity of an entity in communication
 105           ("who") and the locator expresses the location of the
 106           entity ("where").
 107
 108           ILA can be configured using the "encap ila" option with
 109           "ip -6 route" command. ILA is described in
 110           https://tools.ietf.org/html/draft-herbert-nvo3-ila-00.
 111
 112           If unsure, say N.
 113
 114 config INET6_XFRM_TUNNEL
 115         tristate
 116         select INET6_TUNNEL
 117         default n
 118
 119 config INET6_TUNNEL
 120         tristate
 121         default n
 122
 123 config INET6_XFRM_MODE_TRANSPORT
 124         tristate "IPv6: IPsec transport mode"
 125         default IPV6
 126         select XFRM
 127         ---help---
 128           Support for IPsec transport mode.
 129
 130           If unsure, say Y.
 131
 132 config INET6_XFRM_MODE_TUNNEL
 133         tristate "IPv6: IPsec tunnel mode"
 134         default IPV6
 135         select XFRM
 136         ---help---
 137           Support for IPsec tunnel mode.
 138
 139           If unsure, say Y.
 140
 141 config INET6_XFRM_MODE_BEET
 142         tristate "IPv6: IPsec BEET mode"
 143         default IPV6
 144         select XFRM
 145         ---help---
 146           Support for IPsec BEET mode.
 147
 148           If unsure, say Y.
 149
 150 config INET6_XFRM_MODE_ROUTEOPTIMIZATION
 151         tristate "IPv6: MIPv6 route optimization mode"
 152         select XFRM
 153         ---help---
 154           Support for MIPv6 route optimization mode.
 155
 156 config IPV6_VTI
 157 tristate "Virtual (secure) IPv6: tunneling"
 158         select IPV6_TUNNEL
 159         select NET_IP_TUNNEL
 160         depends on INET6_XFRM_MODE_TUNNEL
 161         ---help---
 162         Tunneling means encapsulating data of one protocol type within
 163         another protocol and sending it over a channel that understands the
 164         encapsulating protocol. This can be used with xfrm mode tunnel to give
 165         the notion of a secure tunnel for IPSEC and then use routing protocol
 166         on top.
 167
 168 config IPV6_SIT
 169         tristate "IPv6: IPv6-in-IPv4 tunnel (SIT driver)"
 170         select INET_TUNNEL
 171         select NET_IP_TUNNEL
 172         select IPV6_NDISC_NODETYPE
 173         default y
 174         ---help---
 175           Tunneling means encapsulating data of one protocol type within
 176           another protocol and sending it over a channel that understands the
 177           encapsulating protocol. This driver implements encapsulation of IPv6
 178           into IPv4 packets. This is useful if you want to connect two IPv6
 179           networks over an IPv4-only path.
 180
 181           Saying M here will produce a module called sit. If unsure, say Y.
 182
 183 config IPV6_SIT_6RD
 184         bool "IPv6: IPv6 Rapid Deployment (6RD)"
 185         depends on IPV6_SIT
 186         default n
 187         ---help---
 188           IPv6 Rapid Deployment (6rd; draft-ietf-softwire-ipv6-6rd) builds upon
 189           mechanisms of 6to4 (RFC3056) to enable a service provider to rapidly
 190           deploy IPv6 unicast service to IPv4 sites to which it provides
 191           customer premise equipment.  Like 6to4, it utilizes stateless IPv6 in
 192           IPv4 encapsulation in order to transit IPv4-only network
 193           infrastructure.  Unlike 6to4, a 6rd service provider uses an IPv6
 194           prefix of its own in place of the fixed 6to4 prefix.
 195
 196           With this option enabled, the SIT driver offers 6rd functionality by
 197           providing additional ioctl API to configure the IPv6 Prefix for in
 198           stead of static 2002::/16 for 6to4.
 199
 200           If unsure, say N.
 201
 202 config IPV6_NDISC_NODETYPE
 203         bool
 204
 205 config IPV6_TUNNEL
 206         tristate "IPv6: IP-in-IPv6 tunnel (RFC2473)"
 207         select INET6_TUNNEL
 208         ---help---
 209           Support for IPv6-in-IPv6 and IPv4-in-IPv6 tunnels described in
 210           RFC 2473.
 211
 212           If unsure, say N.
 213
 214 config IPV6_GRE
 215         tristate "IPv6: GRE tunnel"
 216         select IPV6_TUNNEL
 217         select NET_IP_TUNNEL
 218         ---help---
 219           Tunneling means encapsulating data of one protocol type within
 220           another protocol and sending it over a channel that understands the
 221           encapsulating protocol. This particular tunneling driver implements
 222           GRE (Generic Routing Encapsulation) and at this time allows
 223           encapsulating of IPv4 or IPv6 over existing IPv6 infrastructure.
 224           This driver is useful if the other endpoint is a Cisco router: Cisco
 225           likes GRE much better than the other Linux tunneling driver ("IP
 226           tunneling" above). In addition, GRE allows multicast redistribution
 227           through the tunnel.
 228
 229           Saying M here will produce a module called ip6_gre. If unsure, say N.
 230
 231 config IPV6_MULTIPLE_TABLES
 232         bool "IPv6: Multiple Routing Tables"
 233         select FIB_RULES
 234         ---help---
 235           Support multiple routing tables.
 236
 237 config IPV6_SUBTREES
 238         bool "IPv6: source address based routing"
 239         depends on IPV6_MULTIPLE_TABLES
 240         ---help---
 241           Enable routing by source address or prefix.
 242
 243           The destination address is still the primary routing key, so mixing
 244           normal and source prefix specific routes in the same routing table
 245           may sometimes lead to unintended routing behavior.  This can be
 246           avoided by defining different routing tables for the normal and
 247           source prefix specific routes.
 248
 249           If unsure, say N.
 250
 251 config IPV6_MROUTE
 252         bool "IPv6: multicast routing"
 253         depends on IPV6
 254         ---help---
 255           Experimental support for IPv6 multicast forwarding.
 256           If unsure, say N.
 257
 258 config IPV6_MROUTE_MULTIPLE_TABLES
 259         bool "IPv6: multicast policy routing"
 260         depends on IPV6_MROUTE
 261         select FIB_RULES
 262         help
 263           Normally, a multicast router runs a userspace daemon and decides
 264           what to do with a multicast packet based on the source and
 265           destination addresses. If you say Y here, the multicast router
 266           will also be able to take interfaces and packet marks into
 267           account and run multiple instances of userspace daemons
 268           simultaneously, each one handling a single table.
 269
 270           If unsure, say N.
 271
 272 config IPV6_PIMSM_V2
 273         bool "IPv6: PIM-SM version 2 support"
 274         depends on IPV6_MROUTE
 275         ---help---
 276           Support for IPv6 PIM multicast routing protocol PIM-SMv2.
 277           If unsure, say N.
 278
 279 endif # IPV6