[IPV6]: ROUTE: Add accept_ra_defrtr sysctl.

This controls whether we accept default router information
in RAs.

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

1 files changed, 11 insertions, 0 deletions

diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index 8a8895ef09a7..fbcdcc6ba93b 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -165,6 +165,7 @@ struct ipv6_devconf ipv6_devconf = {
         .max_desync_factor      = MAX_DESYNC_FACTOR,
 #endif
         .max_addresses          = IPV6_MAX_ADDRESSES,
+        .accept_ra_defrtr       = 1,
 };
 
 static struct ipv6_devconf ipv6_devconf_dflt = {
@@ -186,6 +187,7 @@ static struct ipv6_devconf ipv6_devconf_dflt = {
         .max_desync_factor      = MAX_DESYNC_FACTOR,
 #endif
         .max_addresses          = IPV6_MAX_ADDRESSES,
+        .accept_ra_defrtr       = 1,
 };
 
 /* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */
@@ -3116,6 +3118,7 @@ static void inline ipv6_store_devconf(struct ipv6_devconf *cnf,
         array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor;
 #endif
         array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses;
+        array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr;
 }
 
 static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev, 
@@ -3569,6 +3572,14 @@ static struct addrconf_sysctl_table
                         .proc_handler   =       &proc_dointvec,
                 },
                 {
+                        .ctl_name       =       NET_IPV6_ACCEPT_RA_DEFRTR,
+                        .procname       =       "accept_ra_defrtr",
+                        .data           =       &ipv6_devconf.accept_ra_defrtr,
+                        .maxlen         =       sizeof(int),
+                        .mode           =       0644,
+                        .proc_handler   =       &proc_dointvec,
+                },
+                {
                         .ctl_name       =       0,      /* sentinel */
                 }
         },