From: "nctucis" <gis88530@cis.nctu.edu.tw>
To: <linux-kernel@vger.kernel.org>
Subject: skbuff.h
Date: Mon, 9 Apr 2001 21:48:12 +0800 [thread overview]
Message-ID: <012a01c0c0fb$b9305290$ae58718c@cis.nctu.edu.tw> (raw)
Hi,
I use 2.2.16 kernel.
I found that there is a sk_buff structure in
"/usr/src/linux/include/linux/skbuff.c", and
there is a variable "unsigned in csum;" in
the sk_buff structure.
I want to know this checksum check what information.
Could you give me a hand, please?
-=-=-=-=-=-=-=-
In fact, I found 64byte and 1518byte UDP packet waste different
time to do masquerade(ip_fw_masquerade).
Many books say NAT just modify header fields, so it should no
different between small and big packet size.
I guess the different time due to csum_partial(h.raw, doff, sum)
in ip_fw_masquerade(). Right? Thanks a lot.
(But I can't find out source code of this function.)
Cheers,
Tom
next reply other threads:[~2001-04-09 13:42 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-04-09 13:48 nctucis [this message]
2001-04-09 14:36 ` skbuff.h Richard B. Johnson
2001-04-09 15:46 ` skbuff.h gis88530
2001-04-09 15:59 ` skbuff.h Richard B. Johnson
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