netdev - Re: Still using IPTOS_TOS() in kernel? Really???

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Message-Id: <200912171724.32711.schmto@hrz.tu-chemnitz.de>
Date:	Thu, 17 Dec 2009 17:24:32 +0100
From:	Torsten Schmidt <torsten.schmidt@...06.tu-chemnitz.de>
To:	"Philip A. Prindeville" <philipp_subx@...fish-solutions.com>,
	netdev@...r.kernel.org
Subject: Re: Still using IPTOS_TOS() in kernel? Really???

Hi Philip,

interesting .. i am on the way to implement a DSCP/CS statistic to the kernel. 
We need this for network traffic accounting. The concept is the following: 

We create a virtual file /pro/net/ipdscp , this includes several DSCP/CS 
counters. See http://www.iana.org/assignments/dscp-registry/. Every time 
ip_rcv_finish() is called, we take a look at the DSCP/CS (iph->tos) value and 
increment the related counter. If you're interested in, i will send you a 
patch ? ..  

Maybe this is a good starting point for an DSCP/CS implementation. I was also 
shocked that the kernel do not really handle DiffServ thinks. 

> Assuming my crusade to get various common apps and services (wget, TB, FF,
>  Sendmail, Cyrus, ProFTPd, etc) to use DSCP/CS marking (very few apps
>  currently use DSCP or precedence marking), then kernels with the proper
>  default behavior will need to start shipping, right?  I.e. out-of-the-box
>  kernels should handle such apps without further configuration, such as
>  needing to have the DSCP iptables module installed.  They should "just
>  work".
Right. 

Best regards,
Torsten
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