# Re: Linux, tcpdump and vlan

- From: andrei radulescu-banu \<hidden\>
- Date: 2007-07-19 17:47:09 
- List: netdev
- Page: https://ratatoskr.run/netdev/2007/07/982273
- Thread: https://ratatoskr.run/netdev/2007/07/982273/t.md

```text

>> [Andrei] VLAN_TX_SKB_CB() is perfect for that.
> [Patrick, Stephen] No its not. Its only legal to use while something has ownership
of the skb. Between VLAN devices and real devices qdiscs are
free to use it.

All right, using VLAN_TX_SKB_CB() is a bad idea. In that case, we need to amend the skb struct, I don't see another way.





       
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```