On Thu, Jul 24, 2014 at 10:07:09AM +0100, Martin Townsend wrote:
> Hi,
> 
> >From what I can read from 4944 you should be allowed to receive uncompressed 
> >IPv6 packets that have a 6lowpan fragmentation header which I don't think we 
> >currently do. 
> I have a patch waiting to allow this but was wondering if I am right in this 
> assumption.
> 

can you please cite the necessary part of information from rfc4944? Then
I can take a look.


What I know is:

We have a dispatch value which allow to receive uncompressed IPv6
packets. This could we use if the compression isn't necessary and the
whole IPv6 packet fits into 127 MTU inclusive mac header, then
compression makes no sense.

At the moment we handle this in the receiving part but, not in the
sending part [0]. We always compress the IPv6 header, should be easy to
implement it... but this isn't on my ToDo priority list on top10.


[0] 
https://github.com/linux-wpan/linux-wpan-next/blob/master/net/ieee802154/6lowpan_rtnl.c#L480

- Alex

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