netdev - Re: Add a SOCK_DESTROY operation to close sockets from userspace

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Message-ID: <CAKD1Yr1u9gWefNDYT6fQxGtbJ_v+RZ5afc1xQhrRW0rPDFQ05Q@mail.gmail.com>
Date:	Fri, 20 Nov 2015 08:47:50 +0900
From:	Lorenzo Colitti <lorenzo@...gle.com>
To:	Hannes Frederic Sowa <hannes@...essinduktion.org>
Cc:	David Miller <davem@...emloft.net>,
	Tom Herbert <tom@...bertland.com>,
	Eric Dumazet <eric.dumazet@...il.com>,
	Maciej Żenczykowski <zenczykowski@...il.com>,
	Stephen Hemminger <stephen@...workplumber.org>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	Eric Dumazet <edumazet@...gle.com>, Erik Kline <ek@...gle.com>,
	Dmitry Torokhov <dtor@...gle.com>
Subject: Re: Add a SOCK_DESTROY operation to close sockets from userspace

On Fri, Nov 20, 2015 at 8:02 AM, Hannes Frederic Sowa
<hannes@...essinduktion.org> wrote:
> On Thu, Nov 19, 2015, at 19:27, Hannes Frederic Sowa wrote:
>> I will research the semantics behind tcpdrop:
>> <http://www.freebsd.org/cgi/man.cgi?query=tcpdrop&apropos=0&sektion=0&manpath=FreeBSD+10.2-RELEASE&arch=default&format=html>
>
> Fyi, my research shows that it just sends RST and discards complete
> socket state.

That makes sense. It is what RFC 793 calls ABORT:

http://tools.ietf.org/html/rfc793#page-50
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