rohc team mailing list archive

[Moreau David <david.moreau@xxxxxxxxxxxxxxxxxxxx>]

Hello,

Only ROHC packets are allowed to transit between the he ROHC compressor and
the ROHC decompressor. The ROHC decompressor assumes all incoming packets
are ROHC packets therefore you can't give to it a IP packet.
Maybe the uncompressed profile is a little confused. When the ROHC
compressor is using the uncompressed profile, the IP packets are transformed
as ROHC packets (a header is added - RFC3095 - Page 126).

Regards,
David

2009/11/27 Harpreet Singh <harpreeta@xxxxxxxxxxxxx>

> Hi Didier,
>
> I used uncompressed profile.
>
> I found that decompressor crashes the application.
>
> Only if i start the compressor/decompressor with fragment packets.
> then send ip packets.(non fragment packets)
>
> attached is the file with output of crash.
>
> Do you have any idea, why this happened?
>
> Also, what will happen if i dont use rohc_compress function and send
> ip fragment as it is.
>
> and then pass the uncompresseed packet to decompressor.
> what i have seen is decompressor says that it failed to decode it.
>
> I think it should find that it is not compressed so pass it as it is...
>
> can i get your views please?
>
> Regards,
> Harpreet
>
>
> On Thu, 2009-11-26 at 14:05 +0100, Didier Barvaux wrote:
> > Hi,
> >
> > > Thanks for the reply and the information.
> > >
> > > will we get compression in uncompressed profile?
> > >
> > > as you said,To fix the problem, enable the Uncompressed profile or do
> > > not compress IP fragments.
> >
> > No, 'Uncompressed' profile does not compress packets. The sentence "do
> > not compress IP fragments" means "do not ask the ROHC library to
> > compress IP fragments because you will get an error if 'Uncompressed'
> > profile is disabled".
> >
> > Didier Barvaux
> > Viveris Technologies
> >
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