sk_buff in 2.4.0

[Sourav Sen]

Hi,
	As far as I understand, in 2.2.x networking code the protocol
header and data used to reside in a contiguous region in memory(pointed
to by the head, data, tail, end of sk_buff struct), 
ie skb->data is the starting point and skb->tail is the ending point. 

		        |		|
		        |		|
	skb->data --	|--------------	|
		     	|		|
			|		|
			|		|
			|		|
			|		|
	skb->tail --    |---------------|
			|		|

	And the device drivers used to transfer from skb->data to
skb->tail(==skb->len).

	My question is: Is the state of the art same in 2.4.0, ie. is
protocol header and data still has to reside contiguously? Or header and
data may be non-contiguous and the driver does scatter/gather.

	I am starting off in 2.4.0 , plz. help.

--
sourav
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SOURAV SEN    MSc(Engg.) CSA IISc BANGALORE URL : www2.csa.iisc.ernet.in/~sourav 
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