netdev - Re: Skipping past TCP lost packet in userspace

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Message-ID: <alpine.DEB.2.00.1105310602360.13754@uplift.swm.pp.se>
Date:	Tue, 31 May 2011 06:05:05 +0200 (CEST)
From:	Mikael Abrahamsson <swmike@....pp.se>
To:	Josh Lehan <linux@...llan.com>
cc:	netdev@...r.kernel.org
Subject: Re: Skipping past TCP lost packet in userspace

On Mon, 30 May 2011, Josh Lehan wrote:

> Hello.  I looked, but could not find an answer.  Is there already an
> ioctl() or something like that in Linux, that would allow a userspace
> TCP socket to skip past a lost packet?

The basic operation of TCP is that it delivers a character stream to the 
application. That requires TCP to make sure everything is in order and 
nothing is missing.

If you want to do something else, you have to choose another protocol.

> Is there a way for a userspace program to prevent this needless stall?

That's like saying your body has all that needless blood.

-- 
Mikael Abrahamsson    email: swmike@....pp.se
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