[SR-Users] Kamailio MSRP relay problem

[mohammed alyaseen]

Hi Carsten,

Thanks alot for your response...

Actually I don't need an MSRP relay for file transfer between RCS clients. I am using the Kamailio MSRP relay to do file transfer between RCS and WebRTC, WebRTC clients aren't able to do peer-to-peer file transfer using MSRP, here is an MSRP relay needed, therefore I am using the Kamailio MSRP relay...  I modified the RCS stack Implementation and did the file transfer from RCS to WebRTC possible with one small issue (mentioned in the last e-mail). But the problem is that the file transfer doesn't work in the other direction (WebRTC-to-RCS). I couldn't figure it out, why it only works in one direction but in the other not... I am confused :(
 
Medo



Carsten Bock <carsten at ng-voice.com> schrieb am 10:27 Montag, 21.Oktober 2013:
 
Hi Medo,

even if the popular IMS books (e.g. Camarillo's: "The 3G IP Multimedia
Subsystem") states something different and i made the mistake at my
last presentation at KamailioWorld stating something different, the
current MSRP-Implementation of Kamailio is not compliant to GSMA's
RCS-Specs.
With the known Implementations of RCS-Clients, you cannot configure a
MSRP-Relay. According to the Specs, you do not need a MSRP-Relay, but
more a MSRP-Back-2-Back-Useragent (to implement "Store-and-Forward"
and Offline Message storage, instead of making an End-2-End Session),
which is not implemented in any Open-Source solution i know.

Kind regards,
Carsten




2013/10/20 mohammed alyaseen <alyaseen98 at yahoo.com>:
> Hi all...
>
> I am trying to do file transfer between IMS clients (web-based WebRTC and
> android RCS native client). The fisrt test scenario is browser-to-browser
> (WebRTC) using JSSIP stack. The second scenario is RCS-to-Broswer or
> Browser-to-RCS. My testbed consists of OpenIMS and OverSIP for WebRTC
> clients and Kamailio MSRP Relay for file transfer
>
> For file transfer I am using the msrp-crocodile library...
>
> The scenario  browser-to-browser works so far without problems. But in the
> second scenario I have the following problems:
>
> When I try to transfer a file from the RCS client to WebRTC client ,
> kamailio sends the message "error ""481", "Session-does-not-exist", however
> the file is sent, when I click send for the second time...
> When I try to send a file from WebRTC client to RCS client, WebRTC client
> sends all file chunks to kamailio, kamailio receives the chunks but it
> doesn't forward them to the RCS client, in the console I see some errors
> pointed to the configuration file, however I don't know what exactly  the
> problem is. In the attachment please find the logs and the configuration
> file of the kamailio msrp relay...
>
> Can any one help me to solve this problem or give me useful hints?
>
> Thanks a lot in advance....
>
>
> Medo
>
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