[asterisk-bugs] [JIRA] (ASTERISK-29105) res_pjsip: Asterisk does not forward 180 Ringing with SDP correctly, does not setup RTP session

[Joshua C. Colp (JIRA)]

    [ https://issues.asterisk.org/jira/browse/ASTERISK-29105?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=252322#comment-252322 ] 

Joshua C. Colp commented on ASTERISK-29105:
-------------------------------------------

This should actually get turned into a 183 Session Progress on the other side, Asterisk doesn't support sending 180 Ringing with SDP.

> res_pjsip: Asterisk does not forward 180 Ringing with SDP correctly, does not setup RTP session
> -----------------------------------------------------------------------------------------------
>
>                 Key: ASTERISK-29105
>                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-29105
>             Project: Asterisk
>          Issue Type: Bug
>      Security Level: None
>          Components: Resources/res_pjsip_sdp_rtp
>    Affects Versions: 17.6.0
>         Environment: Debian 10
>            Reporter: Sebastian Damm
>            Severity: Minor
>         Attachments: asterisk180SDP.tgz, asterisk.log
>
>
> When Asterisk receives an 180 Ringing response with SDP, it does not forward this response but instead sends an 180 Ringing response without SDP to the caller. Additionally, it does not forward the audio from B to the caller.
> I would expect Asterisk to forward the Ringing with SDP as well as the audio from B to A.
> Attached is a log of Asterisk showing the behavior. Additionally, I have attached a docker scenario to reproduce it. Follow these steps to reproduce:
> * docker-compose up -d
> * docker-compose exec sipp /bin/bash
> * /testcase/start.sh
> * exit from container
> * docker-compose logs asterisk
> * Inside the sipp container you will find sipp output from both caller and called, as well as a pcap file of all udp traffic. Inside the pcap file, you can see that B sends audio to the Asterisk, but there is no audio from Asterisk to A before the 200 OK arrives.



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