From: Duan Jiong Date: Fri, 8 Nov 2013 01:56:53 +0000 (+0800) Subject: ipv6: use rt6_get_dflt_router to get default router in rt6_route_rcv X-Git-Tag: accepted/tizen/common/20141203.182822~1141^2~15 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=f104a567e673f382b09542a8dc3500aa689957b4;p=platform%2Fkernel%2Flinux-arm64.git 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 Acked-by: Hannes Frederic Sowa Signed-off-by: David S. Miller --- diff --git a/net/ipv6/route.c b/net/ipv6/route.c index c28cdda..7faa9d5 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);