Dear Justin, I just want to thank you for you good reply. Your code saved my life in a school project. It is well-written and I learned many things from it, because I am a newbie in netfilter kernel modules programming. Any way Thanks again for your reply. You gave me new hope to continue. On 4/13/10, Justin Yaple <yaplej@xxxxxxxxx> wrote: > Ali, > > Are you sending this copied packet somewhere else? If your goal is > just to modify the skb why make a copy before you modify it? I have > written a kernel module that can compress/decompresses TCP payloads > for traffic between any number of hosts if the traffic is routed > through two systems running my module. If you want to download the > source you can get it from > http://packetsqueezer.portal.codespaces.com. > > To send a new skb though you can do this. It assumes all the required > fields are already populated correctly. > NF_HOOK(PF_INET, NF_IP_LOCAL_OUT, skb, NULL, skb->dst->dev, > dst_output); // Sent the packet. > > > On Tue, Apr 13, 2010 at 1:13 AM, Ali Hamidi <ali.hamidi759@xxxxxxxxx> wrote: >> Is there any way to inject a newly created packet based on the >> captured packet inside a netfilter hook call back function? >> My Goal is to capture a packet change compress its tcp payload and >> send it. i read ipcomp.c and i used its source. when i change skb size >> (like len) and tail pointer kernel hangs. maybe the way to do, is to >> create a new packet based on captured packet and ask kernel to send >> it. I just don't know how to ask kernel to send a newly created >> packet? >> -- >> 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 >> > -- 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
