Help in tcp/ip source hacking

["vamshi varma" <vamshiv@onebox.com>]

Hi,
  I am trying to understand the tcp/ip implementation.
I am stuck at the following point.

In function ip_queue_xmit which calls dev_queue_xmit(as I understood
earlier) after forming ip header I find following line of code.

skb->dst->output(skb);

Till now I thought output func is initialised to dev_queue_xmit.
I tried to print skb->data just before calling this output function
and at the begining of dev_queue_xmit.
The first printk showed only ip packet(without
header) and to my surprise second one at the beging of dev_queue_xmit
it printed with ethernet header.
Can anybody exlain what is the code flow between skb->dst->output and
dev_queue_xmit. And where this dst->output is being initialised. 

-- 
vamshi varma
vamshiv@onebox.com - email


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