[asterisk-bugs] [Asterisk 0017300]: Registration process retries even though OK has been returned from the provider

[Asterisk Bug Tracker]

A NOTE has been added to this issue. 
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https://issues.asterisk.org/view.php?id=17300 
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Reported By:                jcovert
Assigned To:                
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Project:                    Asterisk
Issue ID:                   17300
Category:                   Channels/chan_sip/Registration
Reproducibility:            sometimes
Severity:                   major
Priority:                   normal
Status:                     new
Asterisk Version:           1.6.2.7 
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:             2010-05-06 13:05 CDT
Last Modified:              2010-05-06 16:36 CDT
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Summary:                    Registration process retries even though OK has been
returned from the provider
Description: 
I am seeing the following behaviour with several providers.

When asterisk first starts, registrations proceed well (usually).  As time
goes on, the sip channel starts "missing" the "OK" responses to outgoing
"REGISTER" messages.  In the example I've uploaded, the sixth retry
succeeds, however, I've seen even the sixth fail, resulting in over 270
retries (all with responses which should have been accepted), and messages
of the form "sip_reg_timeout:    -- Registration for 'user at provider' timed
out, trying again (Attempt https://issues.asterisk.org/view.php?id=45)

I've uploaded a SIP DEBUG for your information; the first registration is
OK; then it starts taking six "OK" responses before asterisk is happy.
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 (0121515) jcovert (reporter) - 2010-05-06 16:36
 https://issues.asterisk.org/view.php?id=17300#c121515 
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sanitized and attached.

provider6 is the one that corresponds with the example sipreg.txt 

Issue History 
Date Modified    Username       Field                    Change               
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2010-05-06 16:36 jcovert        Note Added: 0121515                          
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