netdev - RE: [PATCH net-next 0/3] Improve bind(addr, 0) behaviour.

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Date:   Thu, 20 Feb 2020 17:11:41 +0000
From:   David Laight <David.Laight@...LAB.COM>
To:     'Kuniyuki Iwashima' <kuniyu@...zon.co.jp>,
        "davem@...emloft.net" <davem@...emloft.net>,
        "kuznet@....inr.ac.ru" <kuznet@....inr.ac.ru>,
        "yoshfuji@...ux-ipv6.org" <yoshfuji@...ux-ipv6.org>,
        "edumazet@...gle.com" <edumazet@...gle.com>
CC:     "kuni1840@...il.com" <kuni1840@...il.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "osa-contribution-log@...zon.com" <osa-contribution-log@...zon.com>
Subject: RE: [PATCH net-next 0/3] Improve bind(addr, 0) behaviour.

From: Kuniyuki Iwashima
> Sent: 20 February 2020 15:20
> 
> Currently we fail to bind sockets to ephemeral ports when all of the ports
> are exhausted even if all sockets have SO_REUSEADDR enabled. In this case,
> we still have a chance to connect to the different remote hosts.
> 
> The second and third patches fix the behaviour to fully utilize all space
> of the local (addr, port) tuples.

Would it make sense to only do this for the implicit bind() done
when connect() is called on an unbound socket?
In that case only the quadruplet of the local and remote addresses
needs to be unique.

	David

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