> You might want to look at catching the buffer at dev->hard_start_xmit() and > modifying it there before it gets handed off to the ethernet device. In no way its possible for u to allocate memory at the ethernet driver level while Xt. It is much before that the skb is allocated,so at the ethernet level u can only do skb_push or skb_put on the existing buffer allocated while transmitting using the head and tail pointers. But at the reception its the driver job to allocate memory so u can allocate memory at ur wish.! Karthik - Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ IRC Channel: irc.openprojects.net / #kernelnewbies Web Page: http://www.kernelnewbies.org/