[OpenSIPS-Users] sdp answer

Bogdan-Andrei Iancu bogdan at opensips.org
Tue Jan 12 09:44:13 CET 2016


Hi Riko,

I understand, but my knowledge over rtpengine is not so good. Maybe you 
should ask over the rptengine project.

Best regards,

Bogdan-Andrei Iancu
OpenSIPS Founder and Developer
http://www.opensips-solutions.com

On 12.01.2016 08:24, riko nir wrote:
> Hi Andrei,
>
> The opensips and rtpengine is interacting, for overwriting the SDP. We 
> tested "JsSIP client with (opesips + rtpengine)" and it is working fine.
>
> Here, DTLS handshake is happening using rtpengine, and so SRTP is 
> handling by rtpengine.
>
> But I don't want rtpengine to handle SRTP traffic. Only the "DTLS 
> handshake" needs to be handled by RTPEngine and I just need the crypto 
> method and the crypto keys from rtpengine to be sent to opensips.
> Do you have any suggestion for fetching the crypto keys from rtpengine?
>
> Thanks,
> Riko
>
> On Mon, Jan 11, 2016 at 4:24 PM, Bogdan-Andrei Iancu 
> <bogdan at opensips.org <mailto:bogdan at opensips.org>> wrote:
>
>     When OpenSIPS handles the SIP messages carrying SDP (typically
>     INVITE request and 200 OK reply), OpenSIPS will communicate with
>     rtpengine and update the SDP with the new IP and port. Never
>     tested, by AFAIK rtpengine may know to handle SRTP...not sure, you
>     may check with the project.
>
>     Regards,
>
>     Bogdan-Andrei Iancu
>     OpenSIPS Founder and Developer
>     http://www.opensips-solutions.com
>
>     On 11.01.2016 12:00, riko nir wrote:
>>     Ok. Incase if the media needs to go via rtpengine, then how the
>>     signaling happens, and how the rtpengine is forwarding the media
>>     to the other end?
>>
>>     In case of DTLS, only the DTLS handlshake needs to be taken care
>>     by the RtpEngine, and the SRTP is handled by some other media
>>     server, and only the DTLS-key needs to be send to the media
>>     server. In that case, how can we fetch dtls-key after the DTLS
>>     handshake?
>>
>>     Thanks.
>>
>>     On Mon, Jan 11, 2016 at 3:13 PM, Bogdan-Andrei Iancu
>>     <bogdan at opensips.org <mailto:bogdan at opensips.org>> wrote:
>>
>>         Hi Riko,
>>
>>         There are no SDP answers created by opensips - it simply
>>         changes the received SDP offer and it forwards it to the next
>>         destination - basically it is doing proxying (performing some
>>         changes too) of the SDP offers between the end points.
>>
>>         Best regards,
>>
>>         Bogdan-Andrei Iancu
>>         OpenSIPS Founder and Developer
>>         http://www.opensips-solutions.com
>>
>>         On 06.01.2016 15:42, riko nir wrote:
>>>         Hi all,
>>>
>>>         How is the communication flow happens between opensips and
>>>         rtpengine incase of a call through SIP over websocket?
>>>         When opensips receives a sdp offer from a web-based sip
>>>         client, opensips is creating sdp answer or rtpengine is
>>>         creating sdp anwer or rtpengine just updating ice
>>>         information only in sdp and other than that, media related
>>>         info is created by opensips?
>>>
>>>         Thanks.
>>>         Riko
>>>
>>>
>>>         _______________________________________________
>>>         Users mailing list
>>>         Users at lists.opensips.org <mailto:Users at lists.opensips.org>
>>>         http://lists.opensips.org/cgi-bin/mailman/listinfo/users
>>
>>
>
>

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