[asterisk-bugs] [Asterisk 0014292]: [patch] CCBS/CCNR support for QSIG (libpri & chan_dahdi)

[Asterisk Bug Tracker]

A NOTE has been added to this issue. 
====================================================================== 
https://issues.asterisk.org/view.php?id=14292 
====================================================================== 
Reported By:                tomaso
Assigned To:                rmudgett
====================================================================== 
Project:                    Asterisk
Issue ID:                   14292
Category:                   Channels/chan_dahdi/NewFeature
Reproducibility:            N/A
Severity:                   feature
Priority:                   normal
Status:                     assigned
Target Version:             1.6.x Version Tracker
Asterisk Version:           SVN 
Regression:                 No 
SVN Branch (only for SVN checkouts, not tarball releases):  trunk 
SVN Revision (number only!): 162497 
Request Review:              
====================================================================== 
Date Submitted:             2009-01-21 03:33 CST
Last Modified:              2009-08-06 10:32 CDT
====================================================================== 
Summary:                    [patch] CCBS/CCNR support for QSIG (libpri &
chan_dahdi)
Description: 
Based on the COLP/CONP work in asterisk team branch issue8824
http://svn.digium.com/view/asterisk/team/group/issue8824 and the QSIG
COLP/CONP patch in issue 0014068 here comes another patch for chan_dahdi &
libpri regarding the ISDN/QSIG CCBS/CCNR feature.

Since there is some basic stuff done in issue 0014068 regarding QSIG
facility handling in libpri and chan_dahdi the patches requires the patches
from issue 0014068 first.

It has been tested with HiPath 3000 V4.0 and HICOM 300.

libpri-1.4-2008-12-10-ccbsccnr-0.1.0.patch adds CCBS/CCNR support to
libpri-1.4 branch. 
asterisk-issue8824-2008-12-10-ccbsccnr-0.1.0.patch is used to patch
chan_dahdi.c in asterisk-issue8824. 

QSIG CCBS-CCNR.doc is a short description of the new dahdi dialplan
applications and gives information how to use them in the dialplan.


======================================================================
Relationships       ID      Summary
----------------------------------------------------------------------
related to          0014068 [patch] COLP/CONP support in QSIG
====================================================================== 

---------------------------------------------------------------------- 
 (0108709) rmudgett (administrator) - 2009-08-06 10:32
 https://issues.asterisk.org/view.php?id=14292#c108709 
---------------------------------------------------------------------- 
tomaso
I think the deadlock issue you are referring to is already avoided in the
current branch code. There are three locks involved:
1) PRI access lock
2) chan_dahdi private lock.
3) channel lock
The function dahdi_pri_lock_owner() goes through deadlock avoidance to
obtain the third lock if the owner pointer is not null. 

Issue History 
Date Modified    Username       Field                    Change               
====================================================================== 
2009-08-06 10:32 rmudgett       Note Added: 0108709                          
======================================================================