[asterisk-bugs] [Asterisk 0013996]: [patch] Presence subscription on Cisco SIP phone needs special Cisco-styled XML

[Asterisk Bug Tracker]

A NOTE has been added to this issue. 
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https://issues.asterisk.org/view.php?id=13996 
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Reported By:                Nugget
Assigned To:                
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Project:                    Asterisk
Issue ID:                   13996
Category:                   Channels/chan_sip/NewFeature
Reproducibility:            always
Severity:                   feature
Priority:                   normal
Status:                     confirmed
Asterisk Version:           SVN 
JIRA:                       SWP-202 
Regression:                 No 
Reviewboard Link:            
SVN Branch (only for SVN checkouts, not tarball releases):  trunk 
SVN Revision (number only!):  
Request Review:              
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Date Submitted:             2008-11-30 15:13 CST
Last Modified:              2011-01-20 22:35 CST
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Summary:                    [patch] Presence subscription on Cisco SIP phone
needs special Cisco-styled XML
Description: 
Cisco phones appear to be unable to parse the existing PIDF XML being
generated by Asterisk for presence notification.  I've attached a patch
which produces well-formed (but incomplete) XML which will satisfy a Cisco
phone.  The patch as supplied will successfully render a "busy"
subscription, but does not send a subsequent "available" notification, so
presence detection only half works currently.

I suspect the next step might be to watch some CallManager SIP traffic to
identify precisely what XML tags the phone is expecting in order to
properly parse an available subscription, but I'm not in a position to do
that.  I'll continue to work with this, though, and perhaps may be able to
stumble upon the precise data the Cisco phone is looking for.
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 (0130832) gareth (reporter) - 2011-01-20 22:35
 https://issues.asterisk.org/view.php?id=13996#c130832 
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New patch (gareth-1.8.2.2.patch), Subscriptions will now show when a phone
is set DND, there is an important caveat though.

Asterisk can't authenticate the PUBLISH request as the phone changes the
call-id after it has been asked to provide authentication. So the peer
can't have a secret assigned.

That can be fixed in an insecure way, I will probably create a new
sip.conf option (stupidciscophone=yes?) that will encompass buggmwi and any
other workarounds.

DND is implemented as a new device state so it can be used in Custom:
hints as well, ie: devstate change Custom:1234 DONOTDISTURB.

@jbrookes: Are you still keen to work on this? 

Issue History 
Date Modified    Username       Field                    Change               
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2011-01-20 22:35 gareth         Note Added: 0130832                          
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