From: Evgeniy Polyakov <johnpol@2ka.mipt.ru>
To: Jianyong Zhang <jzhang@cse.psu.edu>
Cc: linux-kernel@vger.kernel.org
Subject: Re: a problem about non-linear sk_buff
Date: Thu, 11 Oct 2001 13:42:08 +0400 [thread overview]
Message-ID: <20011011134208.31535158.johnpol@2ka.mipt.ru> (raw)
In-Reply-To: <Pine.SOL.4.33.0110092342190.24061-100000@frack.cse.psu.edu>
In-Reply-To: <Pine.SOL.4.33.0110092342190.24061-100000@frack.cse.psu.edu>
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.
---
WBR. //s0mbre
prev parent reply other threads:[~2001-10-11 9:42 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-10-10 3:51 Jianyong Zhang
2001-10-11 2:08 ` Evgeniy Polyakov
2001-10-11 9:42 ` Evgeniy Polyakov [this message]
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