Hi, I am trying to spoof a packet, I have written a kernel module, once it gets a modified TCP packet(source and dest interchanged, ack seq interchanged) it calls netif_rx (skb) to inject this into the routing path. but I am unable to make this packet reach the correct socket. Any clues on this, can I check some kernel stats to know where and why the packet is being dropped. The various reasons cld be : 1. incorrect tcp or ip check sums, i calculate both myself 2. in the skb->dev field i set the value to the value of skb->dev field of any incoming valid packet : when i get the first packet on netfilter pre routing hook -- i do a memcpy(&my_net_dev, skb->dev, sizeof(struct net_device)); then for the modified TCP packet i set skb->dev=&my_net_dev. So maybe it gets dropped cos of some problem here(or is there any obvious problem here ?) so how do i isolate the problem ? any clues ?? thanks Amit "DISCLAIMER: This message is proprietary to Hughes Software Systems Limited (HSS) and is intended solely for the use of the individual to whom it is addressed. It may contain privileged or confidential information and should not be circulated or used for any purpose other than for what it is intended. If you have received this message in error, please notify the originator immediately. If you are not the intended recipient, you are notified that you are strictly prohibited from using, copying, altering, or disclosing the contents of this message. HSS accepts no responsibility for loss or damage arising from the use of the information transmitted by this email including damage from virus."
