[IPV6] ROUTE: Do not enable router reachability probing in router mode.

RFC4191 explicitly states that the procedures are applicable to
hosts only.  We should not have changed behavior of routers.

Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>

1 files changed, 5 insertions, 4 deletions

diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index a972a6641ed5..b39ae99122d5 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -380,10 +380,11 @@ static struct rt6_info *rt6_select(struct rt6_info **head, int oif,
                         continue;
 
                 if (m > mpri) {
-                        rt6_probe(match);
+                        if (strict & RT6_LOOKUP_F_REACHABLE)
+                                rt6_probe(match);
                         match = rt;
                         mpri = m;
-                } else {
+                } else if (strict & RT6_LOOKUP_F_REACHABLE) {
                         rt6_probe(rt);
                 }
         }
@@ -636,7 +637,7 @@ static struct rt6_info *ip6_pol_route_input(struct fib6_table *table,
         int strict = 0;
         int attempts = 3;
         int err;
-        int reachable = RT6_LOOKUP_F_REACHABLE;
+        int reachable = ipv6_devconf.forwarding ? 0 : RT6_LOOKUP_F_REACHABLE;
 
         strict |= flags & RT6_LOOKUP_F_IFACE;
 
@@ -733,7 +734,7 @@ static struct rt6_info *ip6_pol_route_output(struct fib6_table *table,
         int strict = 0;
         int attempts = 3;
         int err;
-        int reachable = RT6_LOOKUP_F_REACHABLE;
+        int reachable = ipv6_devconf.forwarding ? 0 : RT6_LOOKUP_F_REACHABLE;
 
         strict |= flags & RT6_LOOKUP_F_IFACE;