Re: How to find the chain which calls the match

[Pascal Hambourg <pascal.mail@xxxxxxxxxxxxxxx>]

Hello,

aoliva a écrit :
> Hi all, I am writing a match for iptables and I would like it to have a 
> different behaviour when it is called from different chains (e.g. 
> different behaviour when called from INPUT than OUTPUT) anyone knows how 
> to check in the match which is the chain that is calling it?

I do not have the answer to your question, but you could watch the code 
of the NETMAP target which does destination NAT in the PREROUTING chain 
and source NAT in the POSTROUTING chain. By the way, how does it behave 
in the OUTPUT chain ?