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[Didier Barvaux <didier@xxxxxxxxxxx>]

Hi,

> thanks for the reply. The information about the bidirectional mode was
> really helpful But I still have some concerns about it, which I would
> like to ask.
> 1-Once the decompresser at host # 2 tells its associated compressor to
> send the feedback packet, how I can access that feedback packet so
> that I can send it to the decompressor at host #1?

You do not have to do anything. The feedback data is piggy-backed in the
ROHC packets that are transmitted the other way.


> Please note that I am using two separate systems with host 1 and 2,
> and I need to send the feedback to my host 1 using sockets. Also,
> only host 1 needs to send rohc packet and host 2 has to send only
> feedbacks.

Ok, I see. If you do not have any compressed traffic from host 2 to host
1, you have to force the compressor on host 2 to send the feedback data
without waiting for data to send to host 1.

This may be achieved with the rohc_feedback_flush() function that
returns to the caller a feedback-only ROHC packet. See the complete API
documentation for the rohc_feedback_flush() function :
http://www.tech.viveris.com/docs/rohc/rohc__comp_8h.html#a018058bb0ab4a1419264d8dd2434f7a

The function is used in the tunnel application. You can look at it here
http://bazaar.launchpad.net/~didier-barvaux/rohc/main/annotate/head:/app/tunnel/tunnel.c#L621

This function is not referenced in the compressor API yet. It is a
mistake. I will fix that soon.

Regards,
Didier Barvaux

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