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

[noreply at bugs.digium.com]

The following issue has been SUBMITTED. 
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http://bugs.digium.com/view.php?id=12338 
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Reported By:                farlake
Assigned To:                
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Project:                    Asterisk
Issue ID:                   12338
Category:                   Channels/chan_gtalk
Reproducibility:            always
Severity:                   block
Priority:                   normal
Status:                     new
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 03:26 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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Issue History 
Date Modified   Username       Field                    Change               
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03-31-08 03:26  farlake        Asterisk Version          => 1.6.0-beta4     
03-31-08 03:26  farlake        SVN Branch (only for SVN checkou => N/A          
  
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