Re: netfilter: xt_socket: add XT_SOCKET_NOWILDCARD flag causes behavioural change in userspace?

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Pekka Pietikäinen <pp@xxxxxxxxxx> wrote:
> On 24/10/13 15:05, Eric Dumazet wrote:
> >sk_state 7 means TCP_CLOSE
> >
> >I do not see how a TCP_CLOSE socket can be matched...
> >
> Yep, TCP_CLOSE can't be right, sk_state isn't correct with early
> demux perhaps?

What is weird is that early_demux should NOT influence xt_socket
because from the rules you posted you are using this in PREROUTING,
which is before tcp early demux magic.

Do you have any other netfilter rules (-j TPROXY perhaps?) that could
explain why the skb has a socket attached in the first place by
the time it ends up in the netfilter socket match?

[ ip_rcv() orphans the skb before netfilter prerouting, so skb->sk
  should be NULL ]
--
To unsubscribe from this list: send the line "unsubscribe netfilter-devel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html




[Index of Archives]     [Netfitler Users]     [LARTC]     [Bugtraq]     [Yosemite Forum]

  Powered by Linux