[asterisk-bugs] [JIRA] (ASTERISK-20908) Asterisk presents media desc for video in SDP, missing terminating CRLF

[Stephan Schönberg (www.sberg.net) (JIRA)]

    [ https://issues.asterisk.org/jira/browse/ASTERISK-20908?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=203418#comment-203418 ] 

Stephan Schönberg (www.sberg.net) commented on ASTERISK-20908:
--------------------------------------------------------------

I also want to prove the patch (ASTERISK-20933-11.diff). I had three unsupported media types and the remote parser already crashed on asterisk SDP answer. After adding the patch all is working fine.
                
> Asterisk presents media desc for video in SDP, missing terminating CRLF
> -----------------------------------------------------------------------
>
>                 Key: ASTERISK-20908
>                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-20908
>             Project: Asterisk
>          Issue Type: Bug
>      Security Level: None
>          Components: Channels/chan_sip/General
>    Affects Versions: 11.2.0
>         Environment: Fedora 17 - 3.6.11-1.fc17.x86_64 #1 SMP 
>            Reporter: Dennis DeDonatis
>            Assignee: Matt Jordan
>      Target Release: 11.3.0
>
>         Attachments: asterisk-20908.diff, ASTERISK-20933-11.diff
>
>
> I tried to use X-Lite 3.0 and before any RTP packets went through, X-Lite would send a Bye.  X-Lite was logging "ParseException dereferenced ParseBuffer eof" in its debug log.
> I tracked it down to the SDP message Asterisk sends for the OK after the INVITE doesn't end with a CRLF.  RFC4566 says "The sequence CRLF (0x0d0a) is used to end a record," so I guess that means the last record should have a CRLF.
> It's exceptionally rare I would use X-Lite 3.0, so this problem may exist in all of v11, but the issue intrigued me enough to track this down.
> I've attached a patch against 11.2.0-rc1, but this most likely isn't the best fix (just tacking a CRLF to the end).  It did prove out that adding a CRLF to the end of the SDP message allows the old X-Lite 3.0 to work with Asterisk 11.2.0-rc1.  11.1.0 has the same problem, although I did not try the patch with it.

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