[OpenSIPS-Users] Handling SDP on 302 request with mhome

[Antonis Psaras]

Hello Bogdan

 

Thank you very much for the reply.

 

So what I am doing now is the following

 

if(is_method("INVITE") && !has_totag())

{

...

if (has_body("application/sdp"))

          {

                      if (rtpengine_offer("$avp(rtpflags)"))

                                t_on_reply("REPLY_ANSWER");

          }

          else

          {

                      t_on_reply("REPLY_OFFER");

           }

...

}

 

And what you suggest is to do it like that?

 

if(is_method("INVITE") && !has_totag())

{

...

            t_on_branch("1");

 

...

}

 

branch_route[1]

{

..

if (has_body("application/sdp"))

          {

                      if (rtpengine_offer("$avp(rtpflags)"))

                                t_on_reply("REPLY_ANSWER");

          }

          else

          {

                      t_on_reply("REPLY_OFFER");

           }

...

}

 

branch_route[2]

{

..

if (has_body("application/sdp"))

          {

                      if (rtpengine_offer("$avp(rtpflags)"))

                                t_on_reply("REPLY_ANSWER");

          }

          else

          {

                      t_on_reply("REPLY_OFFER");

           }

...

}

 

failure_route[failure]

{

        if (t_check_status("(301)|(302)"))

        {

                get_redirects("1:1");

 

                uac_replace_from("","$tu");

                uac_replace_to("","$ru");

 

                if (!ds_select_dst("1", "0"))

                {

                        send_reply("500","Unable to route");

                        exit;

                }

                t_on_branch("2");

                t_relay();

  

      }

 

        rtpengine_delete();

}

 

 

 

Best regards

 

 

 

From: Bogdan-Andrei Iancu <bogdan at opensips.org> 
Sent: Τετάρτη, 6 Οκτωβρίου 2021 10:55
To: apsaras at microbase.gr; OpenSIPS users mailling list
<users at lists.opensips.org>
Subject: Re: [OpenSIPS-Users] Handling SDP on 302 request with mhome

 

Hi Antonis,

I guess you should move the enagaing of the rtpengine (for the INVITE time)
in the branch route, so it can do different SDP settings according to the
destination of that branch.

How you do it now will set the SDP in INVITE only in relation to the first
branch (so WAN) and reuse it for the next branches too.

Best regards,



Bogdan-Andrei Iancu
 
OpenSIPS Founder and Developer
  https://www.opensips-solutions.com
OpenSIPS eBootcamp 2021 
  https://opensips.org/training/OpenSIPS_eBootcamp_2021/

On 9/27/21 3:48 AM, Antonis Psaras wrote:

Hello Team

 

I have an OpenSIPs with multi home (WAN / LAN) connected to an Asterisk
(LAN). The problem I have is the following.

 

A call is coming from Asterisk to OpenSIPs LAN interface for a user
registered on OpenSIPs. That user has call forwarding enabled and OpenSIPs
receives a 302. 

 

That request is handled as follows

 

failure_route[failure]

{

        if (t_check_status("(301)|(302)"))

        {

                get_redirects("1:1");

 

                uac_replace_from("","$tu");

                uac_replace_to("","$ru");

 

                if (!ds_select_dst("1", "0"))

                {

                        send_reply("500","Unable to route");

                        exit;

                }

 

                t_relay();

  

      }

 

        rtpengine_delete();

}

 

A new INVITE is generated from OpenSIPs towards Asterisk but SDP negotiated
is the initial (OpenSIPs to Client) with the WAN IP.

 

Is there a way to correct that?

 

Thank you in advance for your support.





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