netdev - Re: sending IP pkgs form user space on a specific interface?

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Message-ID: <OF72446498.F31B6A78-ONC125782C.00794F9B-C125782C.007A2D64@transmode.se>
Date:	Thu, 3 Feb 2011 23:14:30 +0100
From:	Joakim Tjernlund <joakim.tjernlund@...nsmode.se>
To:	Ben Greear <greearb@...delatech.com>
Cc:	netdev@...r.kernel.org
Subject: Re: sending IP pkgs form user space on a specific interface?

Ben Greear <greearb@...delatech.com> wrote on 2011/02/03 23:03:53:
> From: Ben Greear <greearb@...delatech.com>
> To: Joakim Tjernlund <joakim.tjernlund@...nsmode.se>
> Cc: netdev@...r.kernel.org
> Date: 2011/02/03 23:03
> Subject: Re: sending IP pkgs form user space on a specific interface?
>
> On 02/03/2011 01:55 PM, Joakim Tjernlund wrote:
> >
> > Is there a way to specify what I/F a IP pkg should be sent
> > out on?
> >
> > I have multiple ppp I/Fs with the same local and remote address
> > and I need to specify what interface to send OSPF protocol
> > messages to.
>
> Check out SO_BINDTODEVICE.

Thanks, can do setsockopt(s, SOL_SOCKET, SO_BINDTODEVICE, ..) for
each I/Fs I need tx pkgs over?
How do I unbind to any I/F?

If possible, I would like to specify the I/F in the pkg overhead.

   Jocke

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