You may want to read this page: http://vger.kernel.org/~davem/skb.html You will then see you problem. Essentially, you are writing your data into an area that is never sent. What you are end up is this: --------------------------------------------- | your data| space | ll-header | IPv4 header| --------------------------------------------- -vlad -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ