On Tue, 9 Oct 2001 23:51:17 -0400 (EDT)
Jianyong Zhang <jzhang@cse.psu.edu> wrote:
JZ> Hi,
JZ> I'm a newcomer of this list. I want to understand the tcp/ip stack's
JZ> implementaion, and hope that I can get your help.
kernlel-net is also good for this kind of questions.
JZ> I find that that sk_buff can be fragmented, and it's called nonlinear.
JZ> What's the meaning of nonlinear? And what are the meaning of
sk_buff's
May be because of MTU?
JZ> fields: skb->data_len and skb_shinfo(skb)? I have no idea about them.
As I've right understood it from
www.linux.org.uk/Documents/buffers.html (excellent Alan's book)
http://kernelnewbies.org/documents/ipnetworking/linuxipnetworking.html
(the best source of documentation fobeginners)
and skbuff.h
skb->data_len is actuall length of the data( that is all packet length -
header length).
skb_shinfo(skb) returns structure that containig number of fragments, list
of it, and some other( what? ).
JZ> May you explain them? Thank you.
I'm trying, but it can be absolutelly wrong :)
JZ> Jianyong Zhang
Evgeniy Polyakov.
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