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authorErik Nordmark <nordmark@arista.com>2016-12-02 14:00:08 -0800
committerDavid S. Miller <davem@davemloft.net>2016-12-03 23:21:37 -0500
commitadc176c5472214971d77c1a61c83db9b01e9cdc7 (patch)
tree3eec6bc43480aac7ef49ac829c8da68028eebcdb /include/linux/ipv6.h
parentce84c7c6637af66d6e6e11a54b2367fc8f1d7074 (diff)
ipv6 addrconf: Implemented enhanced DAD (RFC7527)
Implemented RFC7527 Enhanced DAD. IPv6 duplicate address detection can fail if there is some temporary loopback of Ethernet frames. RFC7527 solves this by including a random nonce in the NS messages used for DAD, and if an NS is received with the same nonce it is assumed to be a looped back DAD probe and is ignored. RFC7527 is enabled by default. Can be disabled by setting both of conf/{all,interface}/enhanced_dad to zero. Signed-off-by: Erik Nordmark <nordmark@arista.com> Signed-off-by: Bob Gilligan <gilligan@arista.com> Reviewed-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux/ipv6.h')
-rw-r--r--include/linux/ipv6.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/ipv6.h b/include/linux/ipv6.h
index 3f95233b2733..671d014e6429 100644
--- a/include/linux/ipv6.h
+++ b/include/linux/ipv6.h
@@ -68,6 +68,7 @@ struct ipv6_devconf {
#ifdef CONFIG_IPV6_SEG6_HMAC
__s32 seg6_require_hmac;
#endif
+ __u32 enhanced_dad;
struct ctl_table_header *sysctl_header;
};