netdev - Re: Skipping past TCP lost packet in userspace

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

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
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html