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 the line "unsubscribe netdev" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html