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[VLAN]: Allow VLAN interface on top of bridge interface 

When a VLAN interface is created on top of a bridge interface and 
netfilter is enabled to see the bridged packets, the packets can be 
corrupted when passing through the netfilter code. This is caused by the 
VLAN driver not setting the 'protocol' and 'nh' members of the sk_buff 
structure. In general, this is no problem as the VLAN interface is mostly 
connected to a physical ethernet interface which does not use the 
'protocol' and 'nh' members. For a bridge interface, however, these 
members do matter.

Signed-off-by: Jerome Borsboom <j.borsboom@erasmusmc.nl>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jerome Borsboom 2007-04-13 16:12:47 -07:00 committed by David S. Miller
parent 09fe3ef46c
commit 279e172a58
1 changed files with 3 additions and 0 deletions
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3
net/8021q/vlan_dev.c
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@ -380,6 +380,9 @@ int vlan_dev_hard_header(struct sk_buff *skb, struct net_device *dev,
} else {
vhdr->h_vlan_encapsulated_proto = htons(len);
}
skb->protocol = htons(ETH_P_8021Q);
skb->nh.raw = skb->data;
}
/* Before delegating work to the lower layer, enter our MAC-address */