1# SPDX-License-Identifier: GPL-2.0-only 2# 3# IPv6 configuration 4# 5 6# IPv6 as module will cause a CRASH if you try to unload it 7menuconfig IPV6 8 tristate "The IPv6 protocol" 9 default y 10 ---help--- 11 Support for IP version 6 (IPv6). 12 13 For general information about IPv6, see 14 <https://en.wikipedia.org/wiki/IPv6>. 15 For specific information about IPv6 under Linux, see 16 Documentation/networking/ipv6.txt and read the HOWTO at 17 <http://www.tldp.org/HOWTO/Linux+IPv6-HOWTO/> 18 19 To compile this protocol support as a module, choose M here: the 20 module will be called ipv6. 21 22if IPV6 23 24config IPV6_ROUTER_PREF 25 bool "IPv6: Router Preference (RFC 4191) support" 26 ---help--- 27 Router Preference is an optional extension to the Router 28 Advertisement message which improves the ability of hosts 29 to pick an appropriate router, especially when the hosts 30 are placed in a multi-homed network. 31 32 If unsure, say N. 33 34config IPV6_ROUTE_INFO 35 bool "IPv6: Route Information (RFC 4191) support" 36 depends on IPV6_ROUTER_PREF 37 ---help--- 38 Support of Route Information. 39 40 If unsure, say N. 41 42config IPV6_OPTIMISTIC_DAD 43 bool "IPv6: Enable RFC 4429 Optimistic DAD" 44 ---help--- 45 Support for optimistic Duplicate Address Detection. It allows for 46 autoconfigured addresses to be used more quickly. 47 48 If unsure, say N. 49 50config 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 62config 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 78config 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 91config 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 101config 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 109config 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 130config INET6_XFRM_TUNNEL 131 tristate 132 select INET6_TUNNEL 133 default n 134 135config INET6_TUNNEL 136 tristate 137 default n 138 139config IPV6_VTI 140tristate "Virtual (secure) IPv6: tunneling" 141 select IPV6_TUNNEL 142 select NET_IP_TUNNEL 143 select XFRM 144 ---help--- 145 Tunneling means encapsulating data of one protocol type within 146 another protocol and sending it over a channel that understands the 147 encapsulating protocol. This can be used with xfrm mode tunnel to give 148 the notion of a secure tunnel for IPSEC and then use routing protocol 149 on top. 150 151config IPV6_SIT 152 tristate "IPv6: IPv6-in-IPv4 tunnel (SIT driver)" 153 select INET_TUNNEL 154 select NET_IP_TUNNEL 155 select IPV6_NDISC_NODETYPE 156 default y 157 ---help--- 158 Tunneling means encapsulating data of one protocol type within 159 another protocol and sending it over a channel that understands the 160 encapsulating protocol. This driver implements encapsulation of IPv6 161 into IPv4 packets. This is useful if you want to connect two IPv6 162 networks over an IPv4-only path. 163 164 Saying M here will produce a module called sit. If unsure, say Y. 165 166config IPV6_SIT_6RD 167 bool "IPv6: IPv6 Rapid Deployment (6RD)" 168 depends on IPV6_SIT 169 default n 170 ---help--- 171 IPv6 Rapid Deployment (6rd; draft-ietf-softwire-ipv6-6rd) builds upon 172 mechanisms of 6to4 (RFC3056) to enable a service provider to rapidly 173 deploy IPv6 unicast service to IPv4 sites to which it provides 174 customer premise equipment. Like 6to4, it utilizes stateless IPv6 in 175 IPv4 encapsulation in order to transit IPv4-only network 176 infrastructure. Unlike 6to4, a 6rd service provider uses an IPv6 177 prefix of its own in place of the fixed 6to4 prefix. 178 179 With this option enabled, the SIT driver offers 6rd functionality by 180 providing additional ioctl API to configure the IPv6 Prefix for in 181 stead of static 2002::/16 for 6to4. 182 183 If unsure, say N. 184 185config IPV6_NDISC_NODETYPE 186 bool 187 188config IPV6_TUNNEL 189 tristate "IPv6: IP-in-IPv6 tunnel (RFC2473)" 190 select INET6_TUNNEL 191 select DST_CACHE 192 select GRO_CELLS 193 ---help--- 194 Support for IPv6-in-IPv6 and IPv4-in-IPv6 tunnels described in 195 RFC 2473. 196 197 If unsure, say N. 198 199config IPV6_GRE 200 tristate "IPv6: GRE tunnel" 201 select IPV6_TUNNEL 202 select NET_IP_TUNNEL 203 depends on NET_IPGRE_DEMUX 204 ---help--- 205 Tunneling means encapsulating data of one protocol type within 206 another protocol and sending it over a channel that understands the 207 encapsulating protocol. This particular tunneling driver implements 208 GRE (Generic Routing Encapsulation) and at this time allows 209 encapsulating of IPv4 or IPv6 over existing IPv6 infrastructure. 210 This driver is useful if the other endpoint is a Cisco router: Cisco 211 likes GRE much better than the other Linux tunneling driver ("IP 212 tunneling" above). In addition, GRE allows multicast redistribution 213 through the tunnel. 214 215 Saying M here will produce a module called ip6_gre. If unsure, say N. 216 217config IPV6_FOU 218 tristate 219 default NET_FOU && IPV6 220 221config IPV6_FOU_TUNNEL 222 tristate 223 default NET_FOU_IP_TUNNELS && IPV6_FOU 224 select IPV6_TUNNEL 225 226config IPV6_MULTIPLE_TABLES 227 bool "IPv6: Multiple Routing Tables" 228 select FIB_RULES 229 ---help--- 230 Support multiple routing tables. 231 232config IPV6_SUBTREES 233 bool "IPv6: source address based routing" 234 depends on IPV6_MULTIPLE_TABLES 235 ---help--- 236 Enable routing by source address or prefix. 237 238 The destination address is still the primary routing key, so mixing 239 normal and source prefix specific routes in the same routing table 240 may sometimes lead to unintended routing behavior. This can be 241 avoided by defining different routing tables for the normal and 242 source prefix specific routes. 243 244 If unsure, say N. 245 246config IPV6_MROUTE 247 bool "IPv6: multicast routing" 248 depends on IPV6 249 select IP_MROUTE_COMMON 250 ---help--- 251 Support for IPv6 multicast forwarding. 252 If unsure, say N. 253 254config IPV6_MROUTE_MULTIPLE_TABLES 255 bool "IPv6: multicast policy routing" 256 depends on IPV6_MROUTE 257 select FIB_RULES 258 help 259 Normally, a multicast router runs a userspace daemon and decides 260 what to do with a multicast packet based on the source and 261 destination addresses. If you say Y here, the multicast router 262 will also be able to take interfaces and packet marks into 263 account and run multiple instances of userspace daemons 264 simultaneously, each one handling a single table. 265 266 If unsure, say N. 267 268config IPV6_PIMSM_V2 269 bool "IPv6: PIM-SM version 2 support" 270 depends on IPV6_MROUTE 271 ---help--- 272 Support for IPv6 PIM multicast routing protocol PIM-SMv2. 273 If unsure, say N. 274 275config IPV6_SEG6_LWTUNNEL 276 bool "IPv6: Segment Routing Header encapsulation support" 277 depends on IPV6 278 select LWTUNNEL 279 select DST_CACHE 280 select IPV6_MULTIPLE_TABLES 281 ---help--- 282 Support for encapsulation of packets within an outer IPv6 283 header and a Segment Routing Header using the lightweight 284 tunnels mechanism. Also enable support for advanced local 285 processing of SRv6 packets based on their active segment. 286 287 If unsure, say N. 288 289config IPV6_SEG6_HMAC 290 bool "IPv6: Segment Routing HMAC support" 291 depends on IPV6 292 select CRYPTO 293 select CRYPTO_HMAC 294 select CRYPTO_SHA1 295 select CRYPTO_SHA256 296 ---help--- 297 Support for HMAC signature generation and verification 298 of SR-enabled packets. 299 300 If unsure, say N. 301 302config IPV6_SEG6_BPF 303 def_bool y 304 depends on IPV6_SEG6_LWTUNNEL 305 depends on IPV6 = y 306 307endif # IPV6 308