[OpenSIPS-Users] RTP proxy dialog impacted by async

[Bogdan-Andrei Iancu]

Let me try to reproduce it quickly.

Regards,

Bogdan-Andrei Iancu

OpenSIPS Founder and Developer
   https://www.opensips-solutions.com
OpenSIPS Summit 2019
   https://www.opensips.org/events/Summit-2019Amsterdam/

On 03/11/2019 10:37 AM, Callum Guy wrote:
> Hi Bogdan,
>
> Yes, that's correct.
>
> In my scenario I created the dialog, engaged rtpproxy and then 
> performed an async rest_post. The result was that the session creation 
> was not triggered on the remote rtpproxy.
>
> Let me know if I can provide any further information.
>
> Many thanks,
>
> Callum
>
> On Mon, 11 Mar 2019 at 07:26, Bogdan-Andrei Iancu <bogdan at opensips.org 
> <mailto:bogdan at opensips.org>> wrote:
>
>     Hi,
>
>     Shortly said, if you do rtpproxy_engage() *before* an async call,
>     the create session is not triggered  ?
>
>     Regards,
>
>     Bogdan-Andrei Iancu
>
>     OpenSIPS Founder and Developer
>        https://www.opensips-solutions.com
>     OpenSIPS Summit 2019
>        https://www.opensips.org/events/Summit-2019Amsterdam/
>
>     On 03/08/2019 04:30 PM, Callum Guy wrote:
>>     Hi OpenSIPs Community,
>>
>>     I wanted to report an issue I discovered when attempting to use
>>     the rtpproxy module, using the dialog backed rtpproxy_engage()
>>     function. Finding that it was not engaging in certain scenarios I
>>     took a closer look at the activity on the control port and
>>     discovered that OpenSIPS never sent a request to open the session
>>     in this scenario.
>>
>>     To help illustrate, here is an example control port sequence of a
>>     properly engaged call:
>>
>>     65098_11 *UR*8.8.8.8c9,8,0,3,101,13 */the-call-id/*
>>     192.168.153.223 10248 */from-tag/*;1
>>     65118_19 *LR*8.8.8.8c8,101 */the-call-id/* 192.168.153.223 10248
>>     */from-tag/*;1 */to-tag/*;1
>>
>>     In my scenario the *UR* (create session) request was never
>>     received. Without claiming any expertise on the rtpproxy protocol
>>     this was clearly not correct and the *LC* (update session)
>>     request could not locate a session to act on.
>>
>>     Following a fairly lengthy investigation I traced the issue back
>>     to my usage of the async() function where i was issuing the
>>     rtpproxy_engage() request before calling async for another
>>     purpose. The solution was simply to move the rtpproxy_engage()
>>     call to after the async method.
>>
>>     I'm happy that the issue is resolved for my requirements however
>>     I thought I would share the experience to the list in case others
>>     found themselves having a similar issue.
>>
>>     Thanks!
>>
>>     Callum
>>
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