netdev - Re: [PATCH net-next v4 2/2] net: Special handling for IP & MPLS.

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Message-ID: <20200123100011.GB6331@martin-VirtualBox>
Date:   Thu, 23 Jan 2020 15:30:11 +0530
From:   Martin Varghese <martinvarghesenokia@...il.com>
To:     Willem de Bruijn <willemdebruijn.kernel@...il.com>
Cc:     Network Development <netdev@...r.kernel.org>,
        David Miller <davem@...emloft.net>, corbet@....net,
        Alexey Kuznetsov <kuznet@....inr.ac.ru>,
        Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>,
        scott.drennan@...ia.com, Jiri Benc <jbenc@...hat.com>,
        martin.varghese@...ia.com
Subject: Re: [PATCH net-next v4 2/2] net: Special handling for IP & MPLS.

On Wed, Jan 22, 2020 at 01:30:53PM -0500, Willem de Bruijn wrote:
> On Tue, Jan 21, 2020 at 12:51 PM Martin Varghese
> <martinvarghesenokia@...il.com> wrote:
> >
> > From: Martin Varghese <martin.varghese@...ia.com>
> >
> > Special handling is needed in bareudp module for IP & MPLS as they
> > support more than one ethertypes.
> >
> > MPLS has 2 ethertypes. 0x8847 for MPLS unicast and 0x8848 for MPLS multicast.
> > While decapsulating MPLS packet from UDP packet the tunnel destination IP
> > address is checked to determine the ethertype. The ethertype of the packet
> > will be set to 0x8848 if the  tunnel destination IP address is a multicast
> > IP address. The ethertype of the packet will be set to 0x8847 if the
> > tunnel destination IP address is a unicast IP address.
> >
> > IP has 2 ethertypes.0x0800 for IPV4 and 0x86dd for IPv6. The version
> > field of the IP header tunnelled will be checked to determine the ethertype.
> >
> > This special handling to tunnel additional ethertypes will be disabled
> > by default and can be enabled using a flag called ext mode. This flag can
> > be used only with ethertypes 0x8847 and 0x0800.
> >
> > Signed-off-by: Martin Varghese <martin.varghese@...ia.com>
> 
> Acked-by: Willem de Bruijn <willemb@...gle.com>

Thanks for your time.