[asterisk-bugs] [JIRA] (ASTERISK-28322) desync in 183 behavior between chan_sip and chan_pjsip

[Torrey Searle (JIRA)]

    [ https://issues.asterisk.org/jira/browse/ASTERISK-28322?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=246429#comment-246429 ] 

Torrey Searle commented on ASTERISK-28322:
------------------------------------------

this is a port of the following fix from chan_sip

commit 5a2b0d6c2b908140e6005067766737f459d81a50
Author: Olle Johansson <oej at edvina.net>
Date:   Wed Mar 8 10:54:40 2006 +0000

    Issue #6657 - Ignore 183 Session Progress without SDP (imported from 1.2 rev 12458)
    
    
    git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@12459 65c4cc65-6c06-0410-ace0-fbb531ad65f3

> desync in 183 behavior between chan_sip and chan_pjsip
> ------------------------------------------------------
>
>                 Key: ASTERISK-28322
>                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-28322
>             Project: Asterisk
>          Issue Type: Bug
>      Security Level: None
>          Components: Channels/chan_pjsip
>    Affects Versions: 13.20.0
>            Reporter: Torrey Searle
>              Labels: pjsip
>
> chan_sip is designed to explicitly ignore 183 messages if no sdp is found.  chan_pjsip however will instead forward a 183 with sdp instead.  This results in a lack of a ringback tone for impacted users.
> This patch adds a new flag to endpoints allowing the user to have the chan_sip behavior if desired.



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