[asterisk-bugs] [Asterisk 0015800]: Fetching SIP headers from BYE sent by callee

[Asterisk Bug Tracker]

The following issue has been SUBMITTED. 
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https://issues.asterisk.org/view.php?id=15800 
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Reported By:                sergee
Assigned To:                
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Project:                    Asterisk
Issue ID:                   15800
Category:                   Channels/chan_sip/NewFeature
Reproducibility:            have not tried
Severity:                   minor
Priority:                   normal
Status:                     new
Asterisk Version:           SVN 
Regression:                 No 
SVN Branch (only for SVN checkouts, not tarball releases):  trunk 
SVN Revision (number only!): 214898 
Request Review:              
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Date Submitted:             2009-08-31 08:04 CDT
Last Modified:              2009-08-31 08:04 CDT
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Summary:                    Fetching SIP headers from BYE sent by callee
Description: 
We have simple situation:

exten => _X.,1,DIAL(SIP/mypeer/${EXTEN})
exten => h,1,AGI(billing)

There is no way to get headers from BYE message sent by callee. But a lot
of harware provide usefull headers in BYE message, for example Linksys
provide header P-RTP-Stat which contain packet counters, jitter, delay
etc..:

P-RTP-Stat:
PS=256,OS=40960,PR=244,OR=39040,PL=29920,JI=5,LA=0,DU=4,EN=G711a,DE=G711a

Cisco provides another usefull header 'Reason' which contain ISDN hangup
cause code:

Reason: Q.850;cause=16


This patch allows user to fetch any header from BYE sent by callee. It
introduces special variable SIPREMOTEBYEHEADER. This variable should
contain 2 coma separated values. 1st value - a sip header that should be
fetched, 2nd value - name of variable to put sip header in.

So to fetch Header 'Reason' sent by cisco, you simply need to set
variable:

exten => _X.,1,SET(SIPREMOTEBYEHEADER=Reason,MYVAR)
exten => _X.,2,DIAL(SIP/mypeer/${EXTEN})
exten => h,1,AGI(billing)

Right after mypeer sends a BYE, you will have variable MYVAR defined on
your channel.

Patches against branch 1.6.0 and trunk provided.
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Issue History 
Date Modified    Username       Field                    Change               
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2009-08-31 08:04 sergee         New Issue                                    
2009-08-31 08:04 sergee         Asterisk Version          => SVN             
2009-08-31 08:04 sergee         Regression                => No              
2009-08-31 08:04 sergee         SVN Branch (only for SVN checkouts, not tarball
releases) =>  trunk          
2009-08-31 08:04 sergee         SVN Revision (number only!) => 214898          
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