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authorDavid Lebrun <david.lebrun@uclouvain.be>2016-11-08 16:57:41 +0300
committerDavid S. Miller <davem@davemloft.net>2016-11-10 04:40:06 +0300
commit6c8702c60b88651072460f3f4026c7dfe2521d12 (patch)
tree2ff901e3824bb605585e76c43739aa9b4b90ec39 /net/ipv6/Kconfig
parent915d7e5e5930b4f01d0971d93b9b25ed17d221aa (diff)
downloadlinux-6c8702c60b88651072460f3f4026c7dfe2521d12.tar.xz
ipv6: sr: add support for SRH encapsulation and injection with lwtunnels
This patch creates a new type of interfaceless lightweight tunnel (SEG6), enabling the encapsulation and injection of SRH within locally emitted packets and forwarded packets. >From a configuration viewpoint, a seg6 tunnel would be configured as follows: ip -6 ro ad fc00::1/128 encap seg6 mode encap segs fc42::1,fc42::2,fc42::3 dev eth0 Any packet whose destination address is fc00::1 would thus be encapsulated within an outer IPv6 header containing the SRH with three segments, and would actually be routed to the first segment of the list. If `mode inline' was specified instead of `mode encap', then the SRH would be directly inserted after the IPv6 header without outer encapsulation. The inline mode is only available if CONFIG_IPV6_SEG6_INLINE is enabled. This feature was made configurable because direct header insertion may break several mechanisms such as PMTUD or IPSec AH. Signed-off-by: David Lebrun <david.lebrun@uclouvain.be> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6/Kconfig')
-rw-r--r--net/ipv6/Kconfig12
1 files changed, 12 insertions, 0 deletions
diff --git a/net/ipv6/Kconfig b/net/ipv6/Kconfig
index 2343e4f2e0bf..1123a001d729 100644
--- a/net/ipv6/Kconfig
+++ b/net/ipv6/Kconfig
@@ -289,4 +289,16 @@ config IPV6_PIMSM_V2
Support for IPv6 PIM multicast routing protocol PIM-SMv2.
If unsure, say N.
+config IPV6_SEG6_INLINE
+ bool "IPv6: direct Segment Routing Header insertion "
+ depends on IPV6
+ ---help---
+ Support for direct insertion of the Segment Routing Header,
+ also known as inline mode. Be aware that direct insertion of
+ extension headers (as opposed to encapsulation) may break
+ multiple mechanisms such as PMTUD or IPSec AH. Use this feature
+ only if you know exactly what you are doing.
+
+ If unsure, say N.
+
endif # IPV6