[asterisk-bugs] [JIRA] (ASTERISK-20098) P2P bridging can cause the SSRC of a RTP session to change during a call

[Olle Johansson (JIRA)]

    [ https://issues.asterisk.org/jira/browse/ASTERISK-20098?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=211375#comment-211375 ] 

Olle Johansson commented on ASTERISK-20098:
-------------------------------------------

One problem is that Asterisk quite often send two answers to an SDP offer. One in 183 and another slightly different in the 200 OK - but with the same tags and call-id. If we changed our tag in the 200 ok it would look to the other side as another established dialog, not the same as the early dialog. We need to fix that, but I doubt that unless we also change port the other side will see it as a new RTP stream. We could potentially also continue to use the same SSRC and add the new SSRC from the RTP bridge as an CSRC.

I am looking into this now.
                
> P2P bridging can cause the SSRC of a RTP session to change during a call
> ------------------------------------------------------------------------
>
>                 Key: ASTERISK-20098
>                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-20098
>             Project: Asterisk
>          Issue Type: Improvement
>      Security Level: None
>          Components: Core/RTP
>            Reporter: Morten Tryfoss
>            Severity: Minor
>         Attachments: p2pbridge.diff
>
>
> P2P bridging can cause the SSRC id for an RTP stream to change during an active call. This can make some equiptment unhappy.
> I've added a configuration option so that this can be turned off.
> See the attached patch.

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