how do i get a packets contents from using printks

how do i get a packets contents from using printks

[william fitzgerald]

hi all,

i have inserted printk statements into a 2.4.14
kernel in the networking code and want to trace a
packet through the kerenl.

i have being able to record a particular sk_buff
by for example:
printk(KERN_DEBUG"ip_forwrd(sk_buff %P)-> entry
point",skb);

but how do i extract the packets headers etc from
the sk_buff?


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Re: how do i get a packets contents from using printks

[blitzkrieg]

On Mon, May 13, 2002 at 03:03:17PM +0100, william fitzgerald wrote:
> printk(KERN_DEBUG"ip_forwrd(sk_buff %P)-> entry
> point",skb);
> 
> but how do i extract the packets headers etc from
> the sk_buff?

Check the definition of struct sk_buff in linux/skbuff.h, check also 
linux/ip.h, linux/tcp.h and so on... depends which headers you want to 
know.

bye bye
-b

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