[asterisk-bugs] [Asterisk 0012338]: There is no voice channel establishing between GoogleTalk and asterisk

[noreply at bugs.digium.com]

The following issue requires your FEEDBACK. 
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http://bugs.digium.com/view.php?id=12338 
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Reported By:                farlake
Assigned To:                phsultan
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Project:                    Asterisk
Issue ID:                   12338
Category:                   Channels/chan_gtalk
Reproducibility:            always
Severity:                   block
Priority:                   normal
Status:                     feedback
Asterisk Version:           1.6.0-beta4 
SVN Branch (only for SVN checkouts, not tarball releases): N/A 
SVN Revision (number only!):  
Disclaimer on File?:        N/A 
Request Review:              
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Date Submitted:             03-31-2008 03:26 CDT
Last Modified:              03-31-2008 08:44 CDT
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Summary:                    There is no voice channel establishing between
GoogleTalk and asterisk
Description: 
The issue is absolutelly stable and blocked for GT interconnecting since
Asterisk 1.4 (at least, in case of connecting from Russia to
talk.google.com)

This caused, because googletalk not understands the <transport> sequence
from Asterisk:

JABBER: asterisk OUTGOING: <iq from='gigasim at gmail.com/Talk48CF2B75'
to='anklimov at gmail.com/Talk.v105AFCCEA63' type='set' id='aaaby'><session
type='transport-info' id='3244105671'
initiator='anklimov at gmail.com/Talk.v105AFCCEA63'
xmlns='http://www.google.com/session'>

<transport xmlns='http://www.google.com/transport/p2p'><candidate
name='rtp' address='192.168.1.2' port='65510' username='696825c97cc875ff'
password='5e3ea4ef2e33b38d' preference='1.00' protocol='udp' type='local'
network='0' generation='0'/></transport></session></iq>


Google returns an error:

JABBER: asterisk INCOMING: <iq type="error"
to="gigasim at gmail.com/Talk48CF2B75" id="aaabx"
from="anklimov at gmail.com/Talk.v105AFCCEA63"><session
type="transport-accept" id="3244105671"
initiator="anklimov at gmail.com/Talk.v105AFCCEA63"
xmlns="http://www.google.com/session"><transport
xmlns="http://www.google.com/transport/p2p"/></session><error code="501"
type="cancel"><feature-not-implemented
xmlns="urn:ietf:params:xml:ns:xmpp-stanzas"/></error></iq>


According real traces, collected beetween two GT clients and GT Client
diagnostic logs, the only 
understandable way to send <candidates> toward googletalk is:

SEND >>>>>>>>>>>>>>>>>>>>>>>>> : Fri Mar 14 00:28:00 2008
<iq to="vklimova at gmail.com/Talk.v939F5BB7E6" type="set" id="113">
  <session xmlns="http://www.google.com/session" type="candidates"
id="255815956" initiator="anklimov at gmail.com/Talk.v105AFCCEA63">
  <candidate name="rtp" address="192.168.1.10" port="3510"
username="gaWVy+jKC/KQ+mIE" password="cfhluFa53hps9tq7" preference="1"
protocol="udp" type="local" network="0" generation="0"/>
  </session>
  </iq>


This approach was tested with patch attached (see Additional Info). After
patching, chan_gtalk is working acceptable. 
chan_gtalk contain plenty another bugs, perhaps. It is not send in
<candidates> external IP, that could causes unstable voice chanel
establishing in case GT client connected via https tunnel, but it requeres
additional investigation. 
Now it just working.
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---------------------------------------------------------------------- 
 phsultan - 03-31-08 08:44  
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Wrapping 'candidates' tags in 'transport' is valid with my GoogleTalk
client version (1.0.0.104).

It looks like you're running an older localized version of the GoogleTalk
client. Please install the latest english version, see
http://bugs.digium.com/view.php?id=10512, thanks! 

Issue History 
Date Modified   Username       Field                    Change               
====================================================================== 
03-31-08 08:44  phsultan       Note Added: 0084778                          
03-31-08 08:44  phsultan       Status                   assigned => feedback
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