[OpenSIPS-Users] RTP Proxy and Re-Invites

[Ali Pey]

Hi Razvan,

Thank you for your response and it makes sense.

I will search for a work around for media re-negotiation rejection and will
post my results here.

Best regards,
Ali Pey


On Fri, Nov 14, 2014 at 4:45 AM, Răzvan Crainea <razvan at opensips.org> wrote:

>  Hi, Ali!
>
> The reINVITES should be handled similar to INVITEs, with an offer for the
> request and an answer for the reply. But indeed, there's no way to recover
> from a rejected reINVITE.
> Actually the problem is a bit deeper and I don't really know how this
> should be handled. It depends on whether the client sends the re-invite to
> create a new media stream, or update the old one. In the first case,
> RTPProxy should create a new media stream and if that one fails, only
> delete the latter one - this is not supported by RTPProxy. In the second
> case, the entire media should be seized, and this is how it works now :).
>
> Best regards,
>
> Răzvan Crainea
> OpenSIPS Solutions <https://contactmonkey.com/api/v1/tracker?cm_session=e1c3197b-a7bb-42f0-9b6f-814623288ae7&cm_type=link&cm_link=65f31eb4-983e-4f92-bfef-1acb9dfcef3c&cm_destination=http://www.opensips-solutions.com>www.opensips-solutions.com <https://contactmonkey.com/api/v1/tracker?cm_session=e1c3197b-a7bb-42f0-9b6f-814623288ae7&cm_type=link&cm_link=655752ea-cb3a-434b-b241-a5c486c33b11&cm_destination=http://www.opensips-solutions.com>
>
> On 11/14/2014 03:30 AM, Jeff Pyle wrote:
>
> Ali,
>
>  This is what I use within loose_route() to handle rtpproxy.  In my
> particular case I'm bridging between two interfaces.
>
>
>    if (has_body("application/sdp"))  {
>            # Begin rtp session update gyrations
>           if (method == "INVITE") {
>                   # INVITE w/ SDP, so early neg
>                   # This is offer, reply is answer
>                   rtpproxy_offer("frocl");
>                   t_on_reply("1");
>           } else if (method == "ACK") {
>                   # ACK w/ SDP, so late neg (done now)
>                   # This is answer
>                   rtpproxy_answer("frocl");
>           }
>   } else {
>           if (method == "INVITE") {
>                   # INVITE w/o SDP, so late neg
>                   # This is nothing, reply is offer, ACK is answer (~5
> lines up)
>                   t_on_reply("2");
>           } else {
>                   t_on_reply("1");
>           }
>   }
>
>
>
>  And then:
>
>
>   onreply_route[1] {      # Manage content as necessary - early
> negotiation
>          if (has_body("application/sdp")) {
>                  if ($DLG_status) {      # Update
>                          rtpproxy_answer("frocl");
>                  } else {                # New
>                          rtpproxy_answer("froc");
>                  }
>          }
>  }
>
>
>   onreply_route[2] {      # Manage content as necessary -
> late negotiation - update
>          if (has_body("application/sdp")) {
>                  rtpproxy_offer("frocl");
>          }
>  }
>
>
>
>
>  This does not handle rejected reinvites.  I don't know how to solve that
> one.  Otherwise, it works well, although in some spots it may be overkill.
>
>
>  - Jeff
>
>
>
> On Thu, Nov 13, 2014 at 5:13 PM, Ali Pey <alipey at gmail.com> wrote:
>
>> Hello,
>>
>>  What's the best way of handling rtpproxy with re-invites?
>>
>>  Should I do unforce and then offer/answer? What if the re-invite gets
>> rejected?
>>
>>  Any help appreciated.
>>
>>  Thanks,
>> Ali Pey
>>
>>
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>
>
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