netdev - Re: [net-next v2 3/3] cfg80211: add MPLS and 802.21 classification

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Date:	Tue, 18 Feb 2014 18:30:30 +0100
From:	Arend van Spriel <arend@...adcom.com>
To:	David Miller <davem@...emloft.net>,
	<mathias.kretschmer@...us.fraunhofer.de>
CC:	<sw@...onwunderlich.de>, <netdev@...r.kernel.org>,
	<linux-wireless@...r.kernel.org>
Subject: Re: [net-next v2 3/3] cfg80211: add MPLS and 802.21 classification

On 02/17/2014 08:06 PM, David Miller wrote:
> From: "Kretschmer, Mathias" <mathias.kretschmer@...us.fraunhofer.de>
> Date: Mon, 17 Feb 2014 17:34:34 +0000
> 
>> Thought so, as well. But it seems that skb->protocol is not properly
>> set when the packet originates from a packet socket.  And in our
>> case we cannot set it to a fixed etherType in the bind() call since
>> we use three different etherTypes on the same socket.
> 
> So many things break if the skb->protocol isn't set correctly that I
> would consider such SKBs mal-formed.

That was my take as well, but how does the kernel code consider this?

> You can specify the protocol number in the msghdr passed into the
> send.
> 

Regards,
Arend

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