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

[Bogdan-Andrei Iancu]

Hi Antonis,

even simpler, you can have a single branch route and from the request 
route or failure route just to set different values for the 
$vp(rtpflags), to reflect the bridging rtpengine has to do.

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 10/6/21 11:08 AM, Antonis Psaras wrote:
>
> 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("","$ru");
>
>                 if (!ds_select_dst("1", "0"))
>
>                 {
>
> send_reply("500","Unable to route");
>
>                         exit;
>
>                 }
>
> t_on_branch("2");
>
>                 t_relay();
>
>       }
>
>         rtpengine_delete();
>
> }
>
> Best regards
>
> *From:* Bogdan-Andrei Iancu <bogdan at opensips.org>
> *Sent:* Τετάρτη, 6 Οκτωβρίου 2021 10:55
> *To:* apsaras at microbase.gr; OpenSIPS users mailling list 
> <users at lists.opensips.org>
> *Subject:* Re: [OpenSIPS-Users] Handling SDP on 302 request with mhome
>
> Hi Antonis,
>
> I guess you should move the enagaing of the rtpengine (for the INVITE 
> time) in the branch route, so it can do different SDP settings 
> according to the destination of that branch.
>
> How you do it now will set the SDP in INVITE only in relation to the 
> first branch (so WAN) and reuse it for the next branches too.
>
> Best regards,
>
> Bogdan-Andrei Iancu
> OpenSIPS Founder and Developer
>    https://www.opensips-solutions.com  <https://www.opensips-solutions.com>
> OpenSIPS eBootcamp 2021
>    https://opensips.org/training/OpenSIPS_eBootcamp_2021/  <https://opensips.org/training/OpenSIPS_eBootcamp_2021/>
>
> On 9/27/21 3:48 AM, Antonis Psaras wrote:
>
>     Hello Team
>
>     I have an OpenSIPs with multi home (WAN / LAN) connected to an
>     Asterisk (LAN). The problem I have is the following.
>
>     A call is coming from Asterisk to OpenSIPs LAN interface for a
>     user registered on OpenSIPs. That user has call forwarding enabled
>     and OpenSIPs receives a 302.
>
>     That request is handled as follows
>
>     failure_route[failure]
>
>     {
>
>             if (t_check_status("(301)|(302)"))
>
>             {
>
>                     get_redirects("1:1");
>
>     uac_replace_from("","$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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>
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>
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>
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