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authorDuan Jiong <duanj.fnst@cn.fujitsu.com>2013-11-08 09:56:53 +0800
committerWilly Tarreau <w@1wt.eu>2014-05-19 07:53:57 +0200
commite2c48fd8fd3bce6a8ff06e940b525b587aca3f13 (patch)
tree10274d9d8e129e35e4211a6d117d812f78915a59 /net
parent062e4edd6a774cd1dd25661cbe1e148aa6811e79 (diff)
ipv6: use rt6_get_dflt_router to get default router in rt6_route_rcv
[ Upstream commit f104a567e673f382b09542a8dc3500aa689957b4 ] 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> Signed-off-by: Willy Tarreau <w@1wt.eu>
Diffstat (limited to '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 e307517cbddc..5af0d1e46f5c 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -495,8 +495,11 @@ 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);