netdev - Re: [RFC PATCH] tcp: introduce raw access to experimental options

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Message-ID: <50BCF303.9020201@linux.vnet.ibm.com>
Date:	Mon, 03 Dec 2012 19:44:19 +0100
From:	Einar Lueck <elelueck@...ux.vnet.ibm.com>
To:	Yuchung Cheng <ycheng@...gle.com>
CC:	netdev@...r.kernel.org, frankbla@...ibm.com, raspl@...ibm.com,
	ubacher@...ibm.com, samudrala@...ibm.com, davem@...emloft.net
Subject: Re: [RFC PATCH] tcp: introduce raw access to experimental options

On 11/28/2012 01:01 PM, Yuchung Cheng wrote:
> On Sat, Nov 17, 2012 at 12:54 AM,  <elelueck@...ux.vnet.ibm.com> wrote:
>> From: Einar Lueck <elelueck@...ux.vnet.ibm.com>
>>
>> This patch adds means for raw acces to TCP expirimental options
>> 253 and 254. The intention of this is to enable user space
>> applications to implement communication behaviour that depends
>> on experimental options. For that, new (set|get)sockopts are
>
> Could you elaborate on the use case? I am having a hard time
> understanding that. If you need to use experimental options for your
> applications, why not just use another magic number according to
> draft-ietf-tcpm-experimental-options-02 (since you cite that too)?

We want to enable application programmers to exploit this without
having to change the kernel with all the corresponding implications.

Einar.

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