diff options
| author | Duan Jiong <duanj.fnst@cn.fujitsu.com> | 2014-01-28 07:49:43 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-01-28 08:38:26 +0400 |
| commit | c0c0c50ff7c3e331c90bab316d21f724fb9e1994 (patch) | |
| tree | 8890196c79356a199374c1e54ef6b61b1043545b /net | |
| parent | 3d9667a9e1e463c107cb47a810ef7e85d9a31e62 (diff) | |
| download | linux-c0c0c50ff7c3e331c90bab316d21f724fb9e1994.tar.xz | |
net: gre: use icmp_hdr() to get inner ip header
When dealing with icmp messages, the skb->data points the
ip header that triggered the sending of the icmp message.
In gre_cisco_err(), the parse_gre_header() is called, and the
iptunnel_pull_header() is called to pull the skb at the end of
the parse_gre_header(), so the skb->data doesn't point the
inner ip header.
Unfortunately, the ipgre_err still needs those ip addresses in
inner ip header to look up tunnel by ip_tunnel_lookup().
So just use icmp_hdr() to get inner ip header instead of skb->data.
Signed-off-by: Duan Jiong <duanj.fnst@cn.fujitsu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/ipv4/ip_gre.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv4/ip_gre.c b/net/ipv4/ip_gre.c index e7a92fdb36f6..ec4f762efda5 100644 --- a/net/ipv4/ip_gre.c +++ b/net/ipv4/ip_gre.c @@ -178,7 +178,7 @@ static int ipgre_err(struct sk_buff *skb, u32 info, else itn = net_generic(net, ipgre_net_id); - iph = (const struct iphdr *)skb->data; + iph = (const struct iphdr *)(icmp_hdr(skb) + 1); t = ip_tunnel_lookup(itn, skb->dev->ifindex, tpi->flags, iph->daddr, iph->saddr, tpi->key); |