diff options
| author | Michal Kubecek <mkubecek@suse.cz> | 2013-05-28 08:26:49 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-05-27 23:39:19 -0700 |
| commit | f96ef988cc603487c03a6de07807b06cbe641829 (patch) | |
| tree | eeca4296492586db73ab13e22da6394203e25b3f | |
| parent | 9a9c56cb34e65000d1f0a4b7553399bfcf7c5a52 (diff) | |
ipv4: fix redirect handling for TCP packets
Unlike ipv4_redirect() and ipv4_sk_redirect(), ip_do_redirect()
doesn't call __build_flow_key() directly but via
ip_rt_build_flow_key() wrapper. This leads to __build_flow_key()
getting pointer to IPv4 header of the ICMP redirect packet
rather than pointer to the embedded IPv4 header of the packet
initiating the redirect.
As a result, handling of ICMP redirects initiated by TCP packets
is broken. Issue was introduced by
4895c771c ("ipv4: Add FIB nexthop exceptions.")
Signed-off-by: Michal Kubecek <mkubecek@suse.cz>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | net/ipv4/route.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/net/ipv4/route.c b/net/ipv4/route.c index 550781a17b3..d35bbf0cf40 100644 --- a/net/ipv4/route.c +++ b/net/ipv4/route.c @@ -737,10 +737,15 @@ static void ip_do_redirect(struct dst_entry *dst, struct sock *sk, struct sk_buf { struct rtable *rt; struct flowi4 fl4; + const struct iphdr *iph = (const struct iphdr *) skb->data; + int oif = skb->dev->ifindex; + u8 tos = RT_TOS(iph->tos); + u8 prot = iph->protocol; + u32 mark = skb->mark; rt = (struct rtable *) dst; - ip_rt_build_flow_key(&fl4, sk, skb); + __build_flow_key(&fl4, sk, iph, oif, tos, prot, mark, 0); __ip_do_redirect(rt, skb, &fl4, true); } |