[IPV6] NDISC: Add proxy_ndp sysctl.

We do not always need proxy NDP functionality even we
enable forwarding.

Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/linux/sysctl.h b/include/linux/sysctl.h
index af61d92354..736ed917a4 100644
--- a/include/linux/sysctl.h
+++ b/include/linux/sysctl.h
@@ -556,6 +556,7 @@ enum {
         NET_IPV6_ACCEPT_RA_RTR_PREF=20,
         NET_IPV6_RTR_PROBE_INTERVAL=21,
         NET_IPV6_ACCEPT_RA_RT_INFO_MAX_PLEN=22,
+        NET_IPV6_PROXY_NDP=23,
         __NET_IPV6_MAX
 };