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kernel: enable SRv6 support by enabling lwtunnel

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Enable the ability to use segment routing based on IPv6. It allows the
packet to specify a path that the packet should take through the
network.

Lwtunnel allow an easy encapsulation of a package. You can just install
ip-full package and use it:

  ip -6 route add  2003::/64 dev eth0 encap seg6 mode encap \
    segs 2001::1,2002::2

An IPv6 package looks like this:
  [IPv6 HDR][IPv6 RH][IPv6 HDR][Data...]

Netifd support:
  https://git.openwrt.org/?p=project/netifd.git;
     a=commit;h=458b1a7e9473c150a40cae5d8be174f4bb03bd39

Increases imagesize by 24.125 KiB. Therefore, only enable for devices
with enough flash.

Signed-off-by: Nick Hainke <vincent@systemli.org>
This commit is contained in:
Nick Hainke 2020-12-12 11:23:54 +01:00 committed by Paul Spooren
parent c625c821d1
commit a1a7f3274e
2 changed files with 8 additions and 1 deletions
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8
config/Config-kernel.in
View File

@ -975,6 +975,14 @@ if KERNEL_IPV6
config KERNEL_IPV6_PIMSM_V2
def_bool n
config KERNEL_IPV6_SEG6_LWTUNNEL
def_bool y if !SMALL_FLASH
help
Using lwtunnel requires full-ip package.
config KERNEL_LWTUNNEL_BPF
def_bool n
endif
#

1
target/linux/generic/config-5.4
View File

@ -2400,7 +2400,6 @@ CONFIG_IPV6_NDISC_NODETYPE=y
# CONFIG_IPV6_ROUTER_PREF is not set
# CONFIG_IPV6_ROUTE_INFO is not set
# CONFIG_IPV6_SEG6_HMAC is not set
# CONFIG_IPV6_SEG6_LWTUNNEL is not set
# CONFIG_IPV6_SIT is not set
# CONFIG_IPV6_SIT_6RD is not set
# CONFIG_IPV6_TUNNEL is not set