From mboxrd@z Thu Jan  1 00:00:00 1970
From: Alexander Aring <aring@mojatatu.com>
Subject: Re: [PATCH net] ieee802154: lowpan_header_create check must check
 daddr
Date: Sun, 23 Dec 2018 15:53:37 -0500
Message-ID: <20181223205337.sehclrqsr6cuqy2o@x220t>
References: <20181223175218.165576-1-willemdebruijn.kernel@gmail.com>
 <20181223204547.aqtr7jxwzdvteao6@x220t>
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Cc: netdev@vger.kernel.org, davem@davemloft.net, alex.aring@gmail.com,
        jukka.rissanen@linux.intel.com,
        Willem de Bruijn <willemb@google.com>
To: Willem de Bruijn <willemdebruijn.kernel@gmail.com>
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Hi,

...

> I need to admit, I never tried AF_PACKET on a lowpan interface but I
> thought about it that it ends in bad things... I would like to forbid
> it, because they should use RAW IPv6 sockets where at least we already
> have code to check that we have at least a IPv6 header at
> skb_packer_header() (I hope this is how it works).
> 
> Is there any way to do that?
> 

At least forbid the sending via AF_PACKET, receiving has of course a
use case for all protocol analyzers outside.

- Alex