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authorJoel Scherpelz <jscherpelz@google.com>2017-03-22 12:19:04 +0300
committerDavid S. Miller <davem@davemloft.net>2017-03-23 00:20:54 +0300
commitbbea124bc99df968011e76eba105fe964a4eceab (patch)
treeec41e6976abf168397615c51eb4a676b37f5bb5e /include/linux/ipv6.h
parent0e4c9f13da28990064c958839e85c565f6adcbf5 (diff)
downloadlinux-bbea124bc99df968011e76eba105fe964a4eceab.tar.xz
net: ipv6: Add sysctl for minimum prefix len acceptable in RIOs.
This commit adds a new sysctl accept_ra_rt_info_min_plen that defines the minimum acceptable prefix length of Route Information Options. The new sysctl is intended to be used together with accept_ra_rt_info_max_plen to configure a range of acceptable prefix lengths. It is useful to prevent misconfigurations from unintentionally blackholing too much of the IPv6 address space (e.g., home routers announcing RIOs for fc00::/7, which is incorrect). Signed-off-by: Joel Scherpelz <jscherpelz@google.com> Acked-by: Lorenzo Colitti <lorenzo@google.com> 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 f0d79bd054ca..e1b442996f81 100644
--- a/include/linux/ipv6.h
+++ b/include/linux/ipv6.h
@@ -37,6 +37,7 @@ struct ipv6_devconf {
__s32 accept_ra_rtr_pref;
__s32 rtr_probe_interval;
#ifdef CONFIG_IPV6_ROUTE_INFO
+ __s32 accept_ra_rt_info_min_plen;
__s32 accept_ra_rt_info_max_plen;
#endif
#endif