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authorDuan Jiong <duanj.fnst@cn.fujitsu.com>2013-11-08 09:56:53 +0800
committerDavid S. Miller <davem@davemloft.net>2013-11-08 15:16:04 -0500
commitf104a567e673f382b09542a8dc3500aa689957b4 (patch)
tree6c85b2cfd65fb0e0e5a506eac73ba70c04a0427a
parentcdbe7c2d6d485459801838c244c409b938e32df5 (diff)
downloadlinux-f104a567e673f382b09542a8dc3500aa689957b4.tar.bz2
ipv6: use rt6_get_dflt_router to get default router in rt6_route_rcv
As the rfc 4191 said, the Router Preference and Lifetime values in a ::/0 Route Information Option should override the preference and lifetime values in the Router Advertisement header. But when the kernel deals with a ::/0 Route Information Option, the rt6_get_route_info() always return NULL, that means that overriding will not happen, because those default routers were added without flag RTF_ROUTEINFO in rt6_add_dflt_router(). In order to deal with that condition, we should call rt6_get_dflt_router when the prefix length is 0. Signed-off-by: Duan Jiong <duanj.fnst@cn.fujitsu.com> Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--net/ipv6/route.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index c28cdda3f5db..7faa9d5e1503 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -731,8 +731,11 @@ int rt6_route_rcv(struct net_device *dev, u8 *opt, int len,
prefix = &prefix_buf;
}
- rt = rt6_get_route_info(net, prefix, rinfo->prefix_len, gwaddr,
- dev->ifindex);
+ if (rinfo->prefix_len == 0)
+ rt = rt6_get_dflt_router(gwaddr, dev);
+ else
+ rt = rt6_get_route_info(net, prefix, rinfo->prefix_len,
+ gwaddr, dev->ifindex);
if (rt && !lifetime) {
ip6_del_rt(rt);