[asterisk-bugs] [JIRA] (ASTERISK-17639) [patch] SIPAddHeader should modify REFER message originated by Transfer application

[David Woolley (JIRA)]

    [ https://issues.asterisk.org/jira/browse/ASTERISK-17639?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=204614#comment-204614 ] 

David Woolley commented on ASTERISK-17639:
------------------------------------------

It's a new feature, not a bug fix.  New features are only applied to the trunk version.
                
> [patch] SIPAddHeader should modify REFER message originated by Transfer application
> -----------------------------------------------------------------------------------
>
>                 Key: ASTERISK-17639
>                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-17639
>             Project: Asterisk
>          Issue Type: New Feature
>          Components: Channels/chan_sip/NewFeature
>            Reporter: Kirill Katsnelson
>         Attachments: 019059-sip-refer-addheaders-1.10.diff, 019059-sip-refer-addheaders-1.8-353549.diff, 019059-sip-refer-addheaders-1.8.diff, 019059-sip-refer-addheaders-trunk-353549.diff
>
>
> There is currently no way to augment a REFER message from Transfer with extra headers. The attached patch implements the feature.
> ****** ADDITIONAL INFORMATION ******
> The feature is enabled by default, with a new sip.conf setting to disable it. The rationale for it to be on by default is that it is in fact very controllable from the dialplan: It takes one application call to SIPRemoveHeader with no argument to remove all previously accumulated additional SIP headers. Since Transfer normally terminates the channel, there is no need in practice to keep any SIP headers beyond it in the channel, so that removing these does not impose any dialplan programming complexity.

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