[asterisk-bugs] [JIRA] (ASTERISK-26376) res_pjsip_sdp_rtp: Multiple audio streams are not properly discarded

[Joshua Colp (JIRA)]

     [ https://issues.asterisk.org/jira/browse/ASTERISK-26376?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Joshua Colp updated ASTERISK-26376:
-----------------------------------

    Status: Open  (was: Triage)

> res_pjsip_sdp_rtp: Multiple audio streams are not properly discarded
> --------------------------------------------------------------------
>
>                 Key: ASTERISK-26376
>                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-26376
>             Project: Asterisk
>          Issue Type: Bug
>      Security Level: None
>          Components: Resources/res_pjsip_sdp_rtp
>    Affects Versions: 13.11.2, 14.0.0-beta2
>            Reporter: Joshua Colp
>            Severity: Minor
>
> When receiving an SDP offer with multiple audio streams details of each can blend together resulting in an incorrect audio stream setup for the initial accepted stream.
> Given the following SDP:
> {noformat}
> m=audio 6002 RTP/SAVP 0
> a=crypto:1 AES_CM_128_HMAC_SHA1_32 inline:WbTBosdVUZqEb6Htqhn+m3z7wUh4RJVR8nE15GbN
> a=rtpmap:0 PCMU/8000
> m=audio 6004 RTP/AVP 0
> a=rtpmap:0 PCMU/8000
> {noformat}
> The resulting audio stream in our answer will contain an RTP/SAVP stream without crypto. This occurs because the second audio stream changes core details which are used by the code that generates the answer.
> We should ignore all but the first audio stream (and probably other streams).



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