On Fri, February 10, 2006 14:46, David Vogt wrote: > Hi, > > iptables provides facilites to queue packets that traverse the kernel > to a user space application. You can specify rules that define which > packets are sent to user space. Furthermore, you can modify packet > data to be reinjected into the kernel. > > I would suggest reading the manpage of libipq, providing a simple API > to receive the packets. A very simple example application can be found > there as well. > As to reinjection, read the ipq_set_verdict man page. > Hope that helps a little bit. Yes, but still : can you give me a reason why I would use iptables/netfilter/libipq to sniff and log packets when I can do it with tcpdump or something ? The OP says <quote>I want to capture IP packets so that I can compress it and then send it to the receiver</quote>. If he just wants to capture packets, it seems to me that using iptables for this is a bit more difficult. Gr, Rob
