From: Eric Dumazet <eric.dumazet@gmail.com>
To: Jesper Dangaard Brouer <brouer@redhat.com>
Cc: netdev <netdev@vger.kernel.org>, Thomas Graf <tgraf@suug.ch>
Subject: Re: Bug with IPv6-UDP address binding
Date: Thu, 09 Aug 2012 13:37:50 +0200 [thread overview]
Message-ID: <1344512270.28967.719.camel@edumazet-glaptop> (raw)
In-Reply-To: <1344505205.3069.55.camel@localhost>
On Thu, 2012-08-09 at 11:40 +0200, Jesper Dangaard Brouer wrote:
> Yes, I guess its an application bug, because Berkely-derived
> implementations don't handle multihomeing well for UDP.
>
> Why are we keeping this, counter-intuitive behavior?
>
Because the BSD api has no other choice.
> What about changing the implementation to act like Solaris, which IMHO
> makes much more sense?
>
> (BTW, iperf also have this "bug")
>
Please describe how connect() is able to correctly chose for you a
source address, if you have say 256 addresses.
connect() API only requires the destination.
If you want a precise source, you must use bind() before the connect()
Any UDP application wanting to correctly reflect "correct source IP"
must say so to the kernel.
I dont think kernel could magically help here, really.
next prev parent reply other threads:[~2012-08-09 11:37 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-08-08 20:37 Bug with IPv6-UDP address binding Jesper Dangaard Brouer
2012-08-08 20:59 ` Eric Dumazet
2012-08-09 9:40 ` Jesper Dangaard Brouer
2012-08-09 11:37 ` Eric Dumazet [this message]
2012-08-09 11:43 ` Eric Dumazet
2012-08-10 19:15 ` Jesper Dangaard Brouer
2012-08-21 21:51 ` Jesper Dangaard Brouer
2012-08-09 11:48 ` Eric Dumazet
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