netdev - Re: A call to revise sockets behaviour

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Message-ID: <2134648871.43175.1375120936132.JavaMail.mail@webmail09>
Date:	Mon, 29 Jul 2013 18:02:16 +0000 (UTC)
From:	"Artem S. Tashkinov" <t.artem@...os.com>
To:	eric.dumazet@...il.com
Cc:	stephen@...workplumber.org, linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org
Subject: Re: A call to revise sockets behaviour

Jul 29, 2013 11:43:00 PM, Eric wrote:
On Mon, 2013-07-29 at 15:47 +0000, Artem S. Tashkinov wrote:
>
>> A wine developer clearly showed that this option simply doesn't work. 
>> 
>> http://bugs.winehq.org/show_bug.cgi?id=26031#c21
>> 
>> Output of strace:
>> getsockopt(24, SOL_SOCKET, SO_REUSEADDR, [0], [4]) = 0
>> setsockopt(24, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 0
>> bind(24, {sa_family=AF_INET, sin_port=htons(43012), sin_addr=inet_addr("0.     
>> 0.0.0")}, 16) = -1 EADDRINUSE (Address already in use)
>
>Its clear that some other socket did not use SO_REUSADDR
>
>All sockets using a given port _must_ have use SO_REUSADDR to allow this
>port being reused.
>

It's exactly what's been tried. A program running with SO_REUSADDR, once no longer
running consequently fails to regain the rights for the port.
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