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List:       serdev
Subject:    [sr-dev] [tracker] Task opened: sca_call_info_update() function for 180 responses (Attachment added)
From:       sip-router <bugtracker () sip-router ! org>
Date:       2014-06-30 14:28:45
Message-ID: 1404138525.53b1741d8b297 () sip-router ! org
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A new Flyspray task has been opened.  Details are below. 

User who did this - Joao Vitor Arruda (jarruda) 

Attached to Project - sip-router
Summary - sca_call_info_update() function for 180 responses
Task Type - Bug Report
Category - Module
Status - Unconfirmed
Assigned To - 
Operating System - All
Severity - High
Priority - Normal
Reported Version - 4.1
Due in Version - Undecided
Due Date - Undecided
Details - The actual code for sca_call_info_update() function in the SCA Module deal \
with 180 and 183 response codes in different ways: \
https://github.com/kamailio/kamailio/blob/master/modules/sca/sca_call_info.c#L1073-L1080


 - For 180 responses it will produce a NOTIFY with "appearance-state=alerting";
 - For 183 responses it will produce a NOTIFY with "appearance-state=progressing";

Reading the attached "Broadworks SIP Access Side Extensions Interface Specifications, \
Release 13.0, version 1", which the module use as guide, it looks that both 180 and \
183 should produce a NOTIFY with "appearance-state=progressing". 

This document says:
The defined states are:
.....
Progressing = This appearance on the line is currently making an outgoing call.
Alerting = This appearance is receiving an incoming call.
.....

So when processing 180 and 183 responses it should use the same appearance-state \
(progressing) as it is dealing with responses for an outgoing call.

It was noticed that using the "wrong" appearance-state (alerting) when processing 180 \
responses will lead to problems with Polycom phones using firmware version 4.0.3 as \
the phones upon receiving the wrong appearance-state will change the display from \
"To:CalledExtension" to "From:CalledExtension" and record the call in the "Received \
Calls" instead of "Placed Calls".

The attached patch was produced to fix the actual code.

One or more files have been attached.

More information can be found at the following URL:
https://sip-router.org/tracker/index.php?do=details&task_id=446

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