[riot-devel] Fragmentation support in IP

Adeel Mohammad Malik adeel.mohammad.malik at ericsson.com
Fri Aug 19 10:45:00 CEST 2016

Hi Oleg,

Yes I looked into it. It did not seem to work right away. Seems like we will have to dig deeper into it. With the time constraints we have, we have a decision to make whether to rely on chunking in CCN-lite or rely on fragmentation in CCN-lite. The fragmentation approach implemented in CCN-lite is the "Begin-End" Hop by Hop Fragmentation scheme (draft-mosko-icnrg-beginendfragment-01) which if I understand correctly does not support recovery of lost fragments. So it seems like a more riskier option in terms of how our prototype will perform compared to using chunking in CCN-lite. With chunking we can retransmit only the lost chunk unlike fragmentation where a lost fragment will mean retransmitting the whole CCN object.


> -----Original Message-----
> From: devel [mailto:devel-bounces at riot-os.org] On Behalf Of Oleg Hahm
> Sent: Friday, August 19, 2016 10:35 AM
> To: RIOT OS kernel developers
> Cc: Börje Ohlman; Joakim Borgh
> Subject: Re: [riot-devel] Fragmentation support in IP
> Hi Adeel,
> On Thu, Aug 18, 2016 at 10:45:40PM +0000, Adeel Mohammad Malik wrote:
> > We don't want to use CoAP as we are working with ICN (Information
> > Centric
> > Networking) protocols.
> have you checked if fragmentation in CCN-lite works and would serve your
> needs?
> Cheers,
> Oleg
> --
> printk(KERN_DEBUG "%s: Done reprogramming Xilinx, %d bits, good
> luck!\n",...);
>         linux-2.6.6/drivers/net/wan/lmc/lmc_main.c

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