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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/net/if_inet6.h
parentce84c7c6637af66d6e6e11a54b2367fc8f1d7074 (diff)
downloadlinux-adc176c5472214971d77c1a61c83db9b01e9cdc7.tar.bz2
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/net/if_inet6.h')
-rw-r--r--include/net/if_inet6.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/net/if_inet6.h b/include/net/if_inet6.h
index b0576cb2ab25..0fa4c324b713 100644
--- a/include/net/if_inet6.h
+++ b/include/net/if_inet6.h
@@ -55,6 +55,7 @@ struct inet6_ifaddr {
__u8 stable_privacy_retry;
__u16 scope;
+ __u64 dad_nonce;
unsigned long cstamp; /* created timestamp */
unsigned long tstamp; /* updated timestamp */