Re: Question about skbuff

[Ralph Corderoy <ralph@inputplus.demon.co.uk>]

Hi Marco,

> > what exactly is the problem here ?
> 
> The problem is I cannot correctly point to the data content (payload)
> in the tcp header.  And what I've pointed is the end of skbuff.
> 
> > data addr : c7ca3d50
> > tail : c7ca3d50
> > end : c7ca3d50
> 
> The address is the same, so I think I should make something wrong
> while I'm trying to point to the data content (payload) of the tcp
> header.  Could you tell me how can I calculate the address of the
> data content (payload in tcp header) in skbuff.

I know *nothing* about skbuffs but given the lack of answers so far
I'll give you a guess.

Could it be that an skbuff knows nothing about the contents of a TCP
packet and so as far as it's concerned the skbuff data address is the
same as the TCP header?  If you wish to interpret the skbuff's data as
a TCP packet and you want the TCP packet's data then it's up to you to
get to it;  the skbuff's data pointer just gets you to the TCP header.

All complete `finger in the air'.  Someone else step in and give the
right answer please :-)

Cheers,


Ralph.

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