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         ---help---
 222           Tunneling means encapsulating data of one protocol type within
 223           another protocol and sending it over a channel that understands the
 224           encapsulating protocol. This particular tunneling driver implements
 225           GRE (Generic Routing Encapsulation) and at this time allows
 226           encapsulating of IPv4 or IPv6 over existing IPv6 infrastructure.
 227           This driver is useful if the other endpoint is a Cisco router: Cisco
 228           likes GRE much better than the other Linux tunneling driver ("IP
 229           tunneling" above). In addition, GRE allows multicast redistribution
 230           through the tunnel.
 231
 232           Saying M here will produce a module called ip6_gre. If unsure, say N.
 233
 234 config IPV6_MULTIPLE_TABLES
 235         bool "IPv6: Multiple Routing Tables"
 236         select FIB_RULES
 237         ---help---
 238           Support multiple routing tables.
 239
 240 config IPV6_SUBTREES
 241         bool "IPv6: source address based routing"
 242         depends on IPV6_MULTIPLE_TABLES
 243         ---help---
 244           Enable routing by source address or prefix.
 245
 246           The destination address is still the primary routing key, so mixing
 247           normal and source prefix specific routes in the same routing table
 248           may sometimes lead to unintended routing behavior.  This can be
 249           avoided by defining different routing tables for the normal and
 250           source prefix specific routes.
 251
 252           If unsure, say N.
 253
 254 config IPV6_MROUTE
 255         bool "IPv6: multicast routing"
 256         depends on IPV6
 257         ---help---
 258           Experimental support for IPv6 multicast forwarding.
 259           If unsure, say N.
 260
 261 config IPV6_MROUTE_MULTIPLE_TABLES
 262         bool "IPv6: multicast policy routing"
 263         depends on IPV6_MROUTE
 264         select FIB_RULES
 265         help
 266           Normally, a multicast router runs a userspace daemon and decides
 267           what to do with a multicast packet based on the source and
 268           destination addresses. If you say Y here, the multicast router
 269           will also be able to take interfaces and packet marks into
 270           account and run multiple instances of userspace daemons
 271           simultaneously, each one handling a single table.
 272
 273           If unsure, say N.
 274
 275 config IPV6_PIMSM_V2
 276         bool "IPv6: PIM-SM version 2 support"
 277         depends on IPV6_MROUTE
 278         ---help---
 279           Support for IPv6 PIM multicast routing protocol PIM-SMv2.
 280           If unsure, say N.
 281
 282 endif # IPV6