[asterisk-bugs] [JIRA] (ASTERISK-27179) res_pjsip_session: Handling of 'msid' is incorrect

[Matthew Fredrickson (JIRA)]

     [ https://issues.asterisk.org/jira/browse/ASTERISK-27179?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Matthew Fredrickson updated ASTERISK-27179:
-------------------------------------------

    Target Release Version/s: 15.0.0

> res_pjsip_session: Handling of 'msid' is incorrect
> --------------------------------------------------
>
>                 Key: ASTERISK-27179
>                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-27179
>             Project: Asterisk
>          Issue Type: Bug
>      Security Level: None
>          Components: Resources/res_pjsip_sdp_rtp, Resources/res_pjsip_session
>    Affects Versions: GIT, 15.0.0-beta1
>            Reporter: Kevin Harwell
>            Assignee: Kevin Harwell
>      Target Release: 15.0.0
>
>
> The current handling of the msid attribute is not quite right. According to the spec[1] the msid's between the offer/answer are not dependent upon one another. Meaning the same msid's given in an offer do not have to returned in the answer for a given stream. Actually it's probably better if they are not copied/reused since this can potentially cause some browser side confusion.
> Instead Asterisk should always just generate new msids. When doing this we should also pair audio+video streams together when we can, i.e. sharing the same stream but different tracks.
> [1] https://www.ietf.org/id/draft-ietf-mmusic-msid-16.txt



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