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

[Joshua Colp (JIRA)]

Joshua Colp created ASTERISK-26376:
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             Summary: 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: 14.0.0-beta2, 13.11.2
            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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