[asterisk-bugs] [Asterisk 0018597]: Snom BLF subscription does not work

[Asterisk Bug Tracker]

A NOTE has been added to this issue. 
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https://issues.asterisk.org/view.php?id=18597 
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Reported By:                thsgmbh
Assigned To:                
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Project:                    Asterisk
Issue ID:                   18597
Category:                   Channels/chan_sip/Subscriptions
Reproducibility:            always
Severity:                   minor
Priority:                   normal
Status:                     new
Asterisk Version:           SVN 
JIRA:                        
Regression:                 No 
Reviewboard Link:            
SVN Branch (only for SVN checkouts, not tarball releases): 1.6.2 
SVN Revision (number only!): 301220 
Request Review:              
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Date Submitted:             2011-01-11 06:59 CST
Last Modified:              2011-01-11 07:42 CST
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Summary:                    Snom BLF subscription does not work
Description: 
Since Asterisk Branch 1.6.2 SVN Revision 300298, our SNOM phones cannot
subscribe any more to device state changes via xml dialog-info. After
sending the subscribe request, the asterisk servers answers with 401
unauthenticated!?!

I have attached a asterisk/sip debug file...

A possible reason could be a change in chan_sip.c (svn rev. 300298):
"Don't authenticate SUBSCRIBE re-transmissions" !??

But even with NEW subscribe requests and correct authentication values in
the snom sip header, asterisk ALWAYS sends an 401 unauth message back to
the phone.
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 (0130377) thsgmbh (reporter) - 2011-01-11 07:42
 https://issues.asterisk.org/view.php?id=18597#c130377 
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Verified:

1.6.2 SVN Revision 300165 OK
1.6.2 SVN Revision 300298 NOT OK (401 unauthenticated) 

Issue History 
Date Modified    Username       Field                    Change               
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2011-01-11 07:42 thsgmbh        Note Added: 0130377                          
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