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authorYOSHIFUJI Hideaki / 吉藤英明 <yoshfuji@linux-ipv6.org>2013-06-22 11:13:13 +0900
committerDavid S. Miller <davem@davemloft.net>2013-06-25 14:47:22 -0700
commitab4eb3537e3f20b2a88467e1f708a136df6e0ecb (patch)
tree8628924f196b022395f241acec9eab9ae946b55f
parenta3d9dd89b781bdcb14201847608b658442de812b (diff)
downloadvexpress-lsk-ab4eb3537e3f20b2a88467e1f708a136df6e0ecb.tar.gz
ipv6: Process unicast packet with Router Alert by checking flag in skb.
Router Alert option is marked in skb. Previously, IP6CB(skb)->ra was set to positive value for such packets. Since commit dd3332bf ("ipv6: Store Router Alert option in IP6CB directly."), IP6SKB_ROUTERALERT is set in IP6CB(skb)->flags, and the value of Router Alert option (in network byte order) is set to IP6CB(skb)->ra for such packets. Multicast forwarding path uses that flag and value, but unicast forwarding path does not use the flag and misuses IP6CB(skb)->ra value. Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--net/ipv6/ip6_output.c5
1 files changed, 2 insertions, 3 deletions
diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c
index dae1949019d..95703ba2c08 100644
--- a/net/ipv6/ip6_output.c
+++ b/net/ipv6/ip6_output.c
@@ -381,9 +381,8 @@ int ip6_forward(struct sk_buff *skb)
* cannot be fragmented, because there is no warranty
* that different fragments will go along one path. --ANK
*/
- if (opt->ra) {
- u8 *ptr = skb_network_header(skb) + opt->ra;
- if (ip6_call_ra_chain(skb, (ptr[2]<<8) + ptr[3]))
+ if (unlikely(opt->flags & IP6SKB_ROUTERALERT)) {
+ if (ip6_call_ra_chain(skb, ntohs(opt->ra)))
return 0;
}