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| author | Duan Jiong <duanj.fnst@cn.fujitsu.com> | 2013-11-08 09:56:53 +0800 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2014-01-03 04:33:32 +0000 |
| commit | 088ab1d96adc0e00ade2d246ea3d8304b3ce887f (patch) | |
| tree | 1af2961dae8204bf9a5109c19bfd113273ed0c1d /net/ipv6/route.c | |
| parent | 6b23a9a0fbd5ec9a6b5d0034156134864adaf768 (diff) | |
| download | lwn-088ab1d96adc0e00ade2d246ea3d8304b3ce887f.tar.gz lwn-088ab1d96adc0e00ade2d246ea3d8304b3ce887f.zip | |
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: Ben Hutchings <ben@decadent.org.uk>
Diffstat (limited to 'net/ipv6/route.c')
| -rw-r--r-- | net/ipv6/route.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/net/ipv6/route.c b/net/ipv6/route.c index bc9103de753b..1768238c855d 100644 --- a/net/ipv6/route.c +++ b/net/ipv6/route.c @@ -592,8 +592,11 @@ 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); |