[asterisk-bugs] [Asterisk 0014385]: [patch] Unhold fails if first SDP on OK, particularly Cisco CCM 6

[Asterisk Bug Tracker]

The following issue has been set as RELATED TO issue 0018470. 
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https://issues.asterisk.org/view.php?id=14385 
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Reported By:                davidw
Assigned To:                
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Project:                    Asterisk
Issue ID:                   14385
Category:                   Channels/chan_sip/Interoperability
Reproducibility:            always
Severity:                   minor
Priority:                   normal
Status:                     confirmed
Asterisk Version:           SVN 
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:             2009-02-02 06:39 CST
Last Modified:              2011-02-08 13:29 CST
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Summary:                    [patch] Unhold fails if first SDP on OK,
particularly Cisco CCM 6
Description: 
Cisco CCM 6 appears never to send SDP on the INVITE, so Asterisk
effectively makes the offer, even when the Cisco is re-inviting because a
CCM hosted phone has gone on hold.  Asterisk sets up its SDP from flags[1]
in the channel private data structure, which means that, if the channel was
on hold, it will offer a=inactive (observed, although a=recvonly also seems
possible).  Even if the CCM intended to unhold, the only possible response
to an a=inactive offer, is a=inactive.  Asterisk should only actually use
saved state if it is making the response.  For an offer, as it looks like
it can never locally hold, it should offer a=sendrecv.
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Relationships       ID      Summary
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related to          0014448 [patch] chan_sip fails to remove hold w...
related to          0016394 vsendonly is write only
related to          0017878 [patch] chan_sip fails to remove hold w...
related to          0018470 Unable to establish SRTP if receive INV...
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Issue History 
Date Modified    Username       Field                    Change               
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2011-02-08 13:29 lmadsen        Relationship added       related to 0018470  
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