[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>
diff --git a/include/linux/sysctl.h b/include/linux/sysctl.h
index af61d92..736ed91 100644
--- a/include/linux/sysctl.h
+++ b/include/linux/sysctl.h
@@ -556,6 +556,7 @@
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
};