[asterisk-bugs] [Asterisk 0014239]: 491-request pending is sent out of dialog

[Asterisk Bug Tracker]

The following issue requires your FEEDBACK. 
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https://issues.asterisk.org/view.php?id=14239 
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Reported By:                klaus3000
Assigned To:                
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Project:                    Asterisk
Issue ID:                   14239
Category:                   Channels/chan_sip/General
Reproducibility:            always
Severity:                   minor
Priority:                   normal
Status:                     feedback
Asterisk Version:           1.4.22 
Regression:                 No 
SVN Branch (only for SVN checkouts, not tarball releases): N/A 
SVN Revision (number only!):  
Request Review:              
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Date Submitted:             2009-01-14 07:33 CST
Last Modified:              2009-05-20 09:09 CDT
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Summary:                    491-request pending is sent out of dialog
Description: 
Hi!

Asterisk does not handle the following scenario correctly:

--INVITE-->
<-407------
[ACK is lost]

--INVITE w/credentials-->
<-----------491----------

The 491 is wrong as the 491 is only allowed for in-dialog requests. As the
first INVITE is not accepted there is no dialog set up. Thus, Asterisk may
retransmit the 407 to trigger retransmission of the ACK, but this must be
independet from the second INVITE which should be accepted instead of
rejecting with 491 - even if the ACK was not received.

I checked lates SVN commits in chan_sip and itlooks like the problem is
still there.

This issue is maybe related to https://issues.asterisk.org/view.php?id=13849
(although in https://issues.asterisk.org/view.php?id=13849 the second
INVITE is in-dialog).
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Relationships       ID      Summary
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related to          0013849 problem handling race condition - reINV...
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 (0105102) lmadsen (administrator) - 2009-05-20 09:09
 https://issues.asterisk.org/view.php?id=14239#c105102 
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Curious if this is still an issue now that 13849 has been closed. It
appears they may have been related, but not the same issue, but never hurts
to ask since this issue has not been updated in some time. Thanks! 

Issue History 
Date Modified    Username       Field                    Change               
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2009-05-20 09:09 lmadsen        Note Added: 0105102                          
2009-05-20 09:09 lmadsen        Status                   new => feedback     
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