From mboxrd@z Thu Jan  1 00:00:00 1970
From: Willem de Bruijn <willemdebruijn.kernel@gmail.com>
Subject: Re: UDP packets arriving on wrong sockets
Date: Fri, 3 Aug 2018 10:20:06 -0400
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References: <20180802090505.GA29624@canndrew.org> <be3908e6-252f-eb10-a7ac-e2559e98dda6@gmail.com>
 <CAF=yD-KJn8ODsE1cKfRwJ5nFLwnDw-K4s1UhijnxkqX7GtO0OQ@mail.gmail.com> <20180803041911.GA30724@canndrew.org>
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On Fri, Aug 3, 2018 at 12:20 AM Andrew Cann <shum@canndrew.org> wrote:
>
> On Thu, Aug 02, 2018 at 11:21:41AM -0400, Willem de Bruijn wrote:
> > You have two sockets bound to the same address and port? Is this using
> > SO_REUSEPORT?
>
> Yes, this is using SO_REUSEPORT.

Then this is working as intended.

Without SO_REUSEPORT it would not be possible to bind two sockets to
the same address and port. See documentation, e.g., at
https://lwn.net/Articles/542629/