Asterisk Google Talk
- Iksemel installation
- Example setup
- Related dialplan applications
- Useful CLI commands
- Bugs & known issues
- See also
You may want to create a new gmail account for use with Asterisk; note that for gmail you need an invitation, whereas for a pure gtalk account you don't. Jabber/Gtalk depends on iksemel so make sure you have that installed and that the jabber/jingle/gtalk channel drivers are selected (run 'make menuselect' to verify this) before compiling Asterisk 1.4
Iksemel installationFirst you will need to download and install iksemel 1.2:
Installation from sourceNote that since June 2007, iksemel is now available from code.google.com: http://code.google.com/p/iksemel/ and the svn repository below is obsolete.
Due to the recent problems, svn repository is moved away from jabberstudio.org.
To run autogen.sh you must have several packages, it will prompt you for the packages except for libgnutls-dev if you don't have this it will generate an error message in configure.
svn checkout http://svn.uludag.org.tr/projeler/iksemel iksemel
If the above didn't work for you, try this too if you have gnutls installed:
Debian 3.1 SargeThe iksemel deb package will most probably not work out (you see 'JABBER: socket read error' and 'jabber show connected' always shows your gtalk user as 'disconnected'), so you will need to compile from source (see above)
- autogen.sh will complain about AM_PATH_LIBGNUTLS (and ./configure will subsequently fail) if you don't have libgnutls11-dev, so apt-get that first
- edit /etc/ld.so.conf and add /usr/local/lib to it, then run 'ldconfig'
Debian 4.0 EtchThe iksemel package appears to do the job, at least with usetls=on in jabber.conf (as required by the server talk.google.com)
TroubleshootingQ: I see these error message in the CLI, what is wrong? "res_jabber.c:1504 aji_recv_loop: JABBER: socket read error" and "res_jabber.c:482 aji_act_hook: gnuTLS not installed."
A1: I had installed iksemel (XML parsing library for Jabber) from an rpm package, and i guess it had been compiled without GNUTLS being included. i wrote a test program calling a gnutls function call and it failed. So I downloaded iksemel source, compiled it and ran the same test program again, and this time it returned the int value from the function call that i was expecting. Now, "jabber show connected" shows the google talk account as connected.
A2: I was getting a similar problem on ubuntu. It keep saying GnuTLS not installed. After much debugging, we checked the config.log for iksemel-1.2 and observed that the following:
checking for libgnutls-config
checking for libgnutls - version >= 0.1.0
were failing. The fix was to download the source for libgnuTLS and issue a recompile
A3: This works for me, during iksemel source compilation, specify the --with-gnutls option in ./configure.
A4: This is my testing. Create test.c
printf("iks_has_tls is 1\n\r");
printf("iks_has_tls is 0\n\r");
$gcc -liksemel -o test test.c
run ./test if out iks_has_tls is 0, then gnutls need recompile .
$tar -jxvf gnutls-1.7.15.tar.bz2
get iksemel from svn
$svn checkout http://svn.uludag.org.tr/projeler/iksemel iksemel
$./configure --prefix=/usr --with-libgnutls-prefix=/usr --with-gnutls
Then run ./test ,I get the right out "iks_has_tls is 1". Good luck!!
jabber.confThis is where you set your gmail/gtalk account info and will register you with the google server.
[general] debug=yes autoprune=no autoregister=no [gtalk_account] type=client serverhost=talk.google.com firstname.lastname@example.org/Talk secret=***** port=5222 usetls=yes ; TLS is required by talk.google.com, you'll get a 'socket read error' without usesasl=yes email@example.com statusmessage="This is an Asterisk server" timeout=100
gtalk.confThis is where the settings for the actual calls are made:
[general] context=google-in allowguest=yes ; [guest] disallow=all allow=ulaw context=google-in [buddy] firstname.lastname@example.org disallow=all allow=ulaw context=google-in ;order apparently matters, needs to be placed after username= ? connection=gtalk_account
... [google-in] exten => s,1,NoOp( Call from Gtalk ) exten => s,n,Set(CALLERID(name)="From Google Talk") exten => s,n,Dial(SIP/my_sip_phones) ... [google-out] exten => 200,1,Dial(email@example.com)
Ports for signalling and RTPJust like SIP also gtalk (jingle) uses UDP for the media path (=audio), so you'll need to make sure your firewall is configured accordingly. The settings in rtp.conf also apply to gtalk. The gtalk/jingle signalling defaults to port 5222 tcp (how about TLS?).
Receiving text messagesOnce you have established a gtalk call it is also possible to receive instant messages - as long as the other channel supports SendText(). If, for example, a Google Talk client calls a SNOM 360 via SIP and then sends a text message, that message will cause the SNOM's message LED to start blinking, and the user can read the message by pressing the Retrieve key.
No audio, phone keeps ringingQ: I call on the phone and I see an incoming call on my google talk client. Once I click answer on google talk the google talk client appears connected, though I don't hear anything on it. Meanwhile my phone keeps ringing as if the call wasn't answered. When I finally hang up the call on the phone the google talk client shows a message that the call ends. Any ideas on what's going on?
A: To fix it, you will have to add bindaddr=<the_ip_address_of_the_server_running_asterisk> to [general] in gtalk.conf
Want to permanently stop jabber and gtalk?Thats simple, edit /etc/asterisk/modules.conf and add:
noload => res_jabber.so
noload => chan_gtalk.so
Asterisk's jabber module over OpenSSL instead of GnuTLSA timeout handling issue in the iksemel library was fixed using OpenSSL instead of GnuTLS. For the details, see : bug 9972
This also solves the reload issue experienced with the current jabber module.
Related dialplan applications
- JabberStatus: Return presence status of client or transport as values 1-7
- JabberSend: Send a message to a buddy
Useful CLI commands
- jabber show connected
- jabber debug on
- jabber test (needs the user 'asterisk' defined in jabber.conf)
- jabber reload
- gtalk show channels
- gtalk reload
- stun debug on
- see doc/jabber.txt and doc/jingle.txt in your Asterisk source directory
- see configs/jabber.conf.sample and configs/jabber.conf.sample in your Asterisk source directory
Bugs & known issuesIt appears that as of Asterisk 1.4.11 there are still a couple of issue around with gtalk support, here's an excerpt:
update: by applying some of the patches below (marked with "update") it is possible to run a stable chan_gtalk, having both incoming and outgoing calls with good audio quality!
- NAT issues: Be sure to get the latest Google Talk client as Google has also been introducing NAT improvements here
- bug 9401 reports that chan_gtalk doesn't understand DTMF produced by another chan_gtalk
- bug 9972 the 'reload jabber' command apparently does not always fulfill the expectations, moving from GnuTLS to OpenSSL solves this (code available in bug report)
- as of Asterisk 1.4.4 your best bet is to only use the ulaw or alaw codecs; ilbc doesn't work yet with Asterisk (1.4.4) due to different payload setting, and speex appears to crash the Google Talk client 22.214.171.124
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