[asterisk-bugs] [Asterisk 0018378]: Disable connected line updates for dahdi PRI channel

[Asterisk Bug Tracker]

The following issue has been SUBMITTED. 
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https://issues.asterisk.org/view.php?id=18378 
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Reported By:                asbestoshead
Assigned To:                
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Project:                    Asterisk
Issue ID:                   18378
Category:                   Channels/chan_dahdi
Reproducibility:            always
Severity:                   major
Priority:                   normal
Status:                     new
Asterisk Version:           1.8.0 
JIRA:                        
Regression:                 No 
Reviewboard Link:            
SVN Branch (only for SVN checkouts, not tarball releases): N/A 
SVN Revision (number only!):  
Request Review:              
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Date Submitted:             2010-11-25 11:04 CST
Last Modified:              2010-11-25 11:04 CST
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Summary:                    Disable connected line updates for dahdi PRI channel
Description: 
I need to prevent connected line updates from being sent to a PRI channel.

I'm having problems when a call from a PRI is answered by a SIP extension,
then transferred (blind or attended) to another SIP extension. One of my
PRI providers can't handle the ROSE_ETSI_EctInform APDU and drops the
call.

Looking through the chan_dahdi and sig_pri code, I don't see any
configuration flag to block the updates from going through. I would like to
add one.

Looking for guidance to add support to block these updates. I'm thinking I
could patch ast_channel_connected_line_macro() to check for a variable,
CONNECTED_LINE_CALLER_BLOCK or CONNECTED_LINE_CALLEE_BLOCK, and to prevent
the call to ast_channel_update_connected_line() if it is set to 1.

For completeness I'd also patch ast_channel_redirecting_macro() to check
for REDIRECTING_CALLER_BLOCK and REDIRECTING_CALLEE_BLOCK.

I'd then just have to add setvar=CONNECTED_LINE_CALLER_BLOCK=1 in my
chan_dahdi.conf, and for outbound calls to the PRI I may also have to
Set(CONNECTED_LINE_CALLEE_BLOCK=1) in the dialplan.
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Issue History 
Date Modified    Username       Field                    Change               
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2010-11-25 11:04 asbestoshead   New Issue                                    
2010-11-25 11:04 asbestoshead   Asterisk Version          => 1.8.0           
2010-11-25 11:04 asbestoshead   Regression                => No              
2010-11-25 11:04 asbestoshead   SVN Branch (only for SVN checkouts, not tarball
releases) => N/A             
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