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| author | Stephen Hemminger <shemminger@osdl.org> | 2006-01-06 13:13:29 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2006-01-06 13:13:29 -0800 |
| commit | ee02b3a613a692a40e0f48a25d9d60cc751ebbe5 (patch) | |
| tree | 51c034027c96a213ac53cd831dee4cb24fd0ed17 | |
| parent | a20a8554796bc4e28879beabd0db4bf3ce77b686 (diff) | |
| download | linux-3.10-ee02b3a613a692a40e0f48a25d9d60cc751ebbe5.tar.gz linux-3.10-ee02b3a613a692a40e0f48a25d9d60cc751ebbe5.tar.bz2 linux-3.10-ee02b3a613a692a40e0f48a25d9d60cc751ebbe5.zip | |
[BRIDGE] netfilter: vlan + hw checksum = bug?
It looks like the bridge netfilter code does not correctly update
the hardware checksum after popping off the VLAN header.
This is by inspection, I have *not* tested this.
To test you would need to set up a filtering bridge with vlans
and a device the does hardware receive checksum (skge, or sungem)
Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | net/bridge/br_netfilter.c | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/net/bridge/br_netfilter.c b/net/bridge/br_netfilter.c index 223f8270dae..7cac3fb9f80 100644 --- a/net/bridge/br_netfilter.c +++ b/net/bridge/br_netfilter.c @@ -394,8 +394,9 @@ inhdr_error: * target in particular. Save the original destination IP * address to be able to detect DNAT afterwards. */ static unsigned int br_nf_pre_routing(unsigned int hook, struct sk_buff **pskb, - const struct net_device *in, const struct net_device *out, - int (*okfn)(struct sk_buff *)) + const struct net_device *in, + const struct net_device *out, + int (*okfn)(struct sk_buff *)) { struct iphdr *iph; __u32 len; @@ -412,8 +413,10 @@ static unsigned int br_nf_pre_routing(unsigned int hook, struct sk_buff **pskb, goto out; if (skb->protocol == __constant_htons(ETH_P_8021Q)) { + u8 *vhdr = skb->data; skb_pull(skb, VLAN_HLEN); - (skb)->nh.raw += VLAN_HLEN; + skb_postpull_rcsum(skb, vhdr, VLAN_HLEN); + skb->nh.raw += VLAN_HLEN; } return br_nf_pre_routing_ipv6(hook, skb, in, out, okfn); } @@ -429,8 +432,10 @@ static unsigned int br_nf_pre_routing(unsigned int hook, struct sk_buff **pskb, goto out; if (skb->protocol == __constant_htons(ETH_P_8021Q)) { + u8 *vhdr = skb->data; skb_pull(skb, VLAN_HLEN); - (skb)->nh.raw += VLAN_HLEN; + skb_postpull_rcsum(skb, vhdr, VLAN_HLEN); + skb->nh.raw += VLAN_HLEN; } if (!pskb_may_pull(skb, sizeof(struct iphdr))) |