From f9a2fb73318eb4dbf8cd84866b8b0dd012d8b116 Mon Sep 17 00:00:00 2001 From: Arun Ajith S Date: Fri, 15 Apr 2022 08:34:02 +0000 Subject: net/ipv6: Introduce accept_unsolicited_na knob to implement router-side changes for RFC9131 Add a new neighbour cache entry in STALE state for routers on receiving an unsolicited (gratuitous) neighbour advertisement with target link-layer-address option specified. This is similar to the arp_accept configuration for IPv4. A new sysctl endpoint is created to turn on this behaviour: /proc/sys/net/ipv6/conf/interface/accept_unsolicited_na. Signed-off-by: Arun Ajith S Reviewed-by: David Ahern Signed-off-by: David S. Miller --- include/linux/ipv6.h | 1 + include/uapi/linux/ipv6.h | 1 + 2 files changed, 2 insertions(+) (limited to 'include') diff --git a/include/linux/ipv6.h b/include/linux/ipv6.h index 16870f86c74d..918bfea4ef5f 100644 --- a/include/linux/ipv6.h +++ b/include/linux/ipv6.h @@ -61,6 +61,7 @@ struct ipv6_devconf { __s32 suppress_frag_ndisc; __s32 accept_ra_mtu; __s32 drop_unsolicited_na; + __s32 accept_unsolicited_na; struct ipv6_stable_secret { bool initialized; struct in6_addr secret; diff --git a/include/uapi/linux/ipv6.h b/include/uapi/linux/ipv6.h index d4178dace0bf..549ddeaf788b 100644 --- a/include/uapi/linux/ipv6.h +++ b/include/uapi/linux/ipv6.h @@ -194,6 +194,7 @@ enum { DEVCONF_IOAM6_ID, DEVCONF_IOAM6_ID_WIDE, DEVCONF_NDISC_EVICT_NOCARRIER, + DEVCONF_ACCEPT_UNSOLICITED_NA, DEVCONF_MAX }; -- cgit v1.2.3-59-g8ed1b