lib ipq

lib ipq

[Unix User]

hi all 
I use the lib ipq.  I want to know how one can make the difference
between an outgoing and incoming packets with the lib ipq .  I queued
incoming and outgoing packets .
thanks ;)

Re: lib ipq

[Unix User]

hi all
I use the lib ipq.  I want to know how one can make the difference
between an outgoing and incoming packets with the lib ipq .  I queued
incoming and outgoing packets .
i use the packet information to look at the tcp/ip headers and check the ip
addresses to see if it is incoming or outgoing but it doesnt work if
the localhost send a packet at his self (ex : source adress: 127.0.0.1
, dest adress: 127.0.0.1).

how can i make the difference ? 

sorry for my bad english :)

Re: lib ipq

[Christian Theil]

You could probably mark the packet using the nfmark field of the skb. 

If you are doing this with iptables, use the -j MARK target to do
this; something
ala this:
iptables -A OUTPUT -t mangle -i eth0  -j MARK --set-mark 42

Make sure you do this before you queue the packet to userspace.

Regards,
Christian Theil Have.

If you need to do this from userspace with iptables probably
On 6/21/05, Unix User <kerneland@gmail.com> wrote:
> hi all
> I use the lib ipq.  I want to know how one can make the difference
> between an outgoing and incoming packets with the lib ipq .  I queued
> incoming and outgoing packets .
> i use the packet information to look at the tcp/ip headers and check the ip
> addresses to see if it is incoming or outgoing but it doesnt work if
> the localhost send a packet at his self (ex : source adress: 127.0.0.1
> , dest adress: 127.0.0.1).
> 
> how can i make the difference ?
> 
> sorry for my bad english :)
> 
>