Re: what is atomicity of iptables packet processing?

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On Wednesday 2010-05-05 19:57, ratheesh k wrote:

> > On Wednesday 2010-05-05 17:56, Bill Bogstad wrote:
>>Since incoming packets may not be synchronized with outgoing
>packets, there is the possibility that the INPUT chain rules might be
>modifying the connection marking at the same time that the OUTPUT
>chain rules are using the mark to modify the packet.
>
>I am a little bit confused .
>My understanding is pkts will traverse thru various HOOKs one by one .
>PREROUTING -> INPUT etc . So how come ,the same pkt will be marked and
>processed at different hooks at same time  ?

It's about _DIFFERENT_ packets belonging to the same connection.

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