
jabber Module

Daniel Mierla

   FhG FOKUS

Edited by

Daniel Mierla

   Copyright © 2003 FhG FOKUS
     _________________________________________________________

   Table of Contents
   1. User's Guide

        1.1. Overview

              1.1.1. New Features

        1.2. Admin's Guide
        1.3. User's Guide
        1.4. Dependencies

              1.4.1. SER Modules
              1.4.2. External Libraries or Applications

        1.5. Exported Parameters

              1.5.1. db_url (string)
              1.5.2. jaddress (string)
              1.5.3. jport (integer)
              1.5.4. jdomain (string)
              1.5.5. aliases (string)
              1.5.6. proxy (string)
              1.5.7. registrar (string)
              1.5.8. workers (integer)
              1.5.9. max_jobs (integer)
              1.5.10. cache_time (integer)
              1.5.11. delay_time (integer)
              1.5.12. sleep_time (integer)
              1.5.13. check_time (integer)

        1.6. Exported Functions

              1.6.1. jab_send_message()
              1.6.2. jab_send_message()
              1.6.3. jab_join_jconf()
              1.6.4. jab_exit_jconf()
              1.6.5. jab_go_online()
              1.6.6. jab_go_offline()

   2. Developer's Guide
   3. Frequently Asked Questions

   List of Examples
   1-1. Set db_url parameter
   1-2. Set jaddress parameter
   1-3. Set jport parameter
   1-4. Set jdomain parameter
   1-5. Set jdomain parameter
   1-6. Set proxy parameter
   1-7. Set registrar parameter
   1-8. Set workers parameter
   1-9. Set max_jobs parameter
   1-10. Set cache_time parameter
   1-11. Set delay_time parameter
   1-12. Set sleep_time parameter
   1-13. Set check_time parameter
   1-14. jab_send_message() usage
   1-15. jab_send_message() usage
   1-16. jab_join_jconf() usage
   1-17. jab_exit_jconf() usage
   1-18. jab_go_online() usage
   1-19. jab_go_offline() usage
     _________________________________________________________

Chapter 1. User's Guide

1.1. Overview

   This is new version of Jabber module that integrates XODE XML
   parser for parsing Jabber messages. That introduces a new
   module dependency: expat library.

   Expat is a common XML library and is the fastest available for
   Linux/Unix, the second over all, after msxml library. It is
   integrated in most of well known Linux distributions.
     _________________________________________________________

1.1.1. New Features

     * Presence support (see doc/xxjab.cfg for a sample cfg file)
       (January 2003).
     * SIP to Jabber conference support (December 2003).
     * Possibility to manage all kinds of Jabber messages
       (message/presence/iq) (December 2003).
     * Aliases -- Possibility to set host aliases for addresses
       (see parameter's desc.) (December 2003).
     * Send received SIP MESSAGE messages to different IM
       networks (Jabber, ICQ, MSN, AIM, Yahoo) using a Jabber
       server (December 2003).
     * Send incoming Jabber instant messages as SIP MESSAGE
       messages.
     * Gateways detection -- Ability to see whether an IM gateway
       is up or down.
     _________________________________________________________

1.2. Admin's Guide

   Note

   A more complete guide about SIMPLE2Jabber gateway can be found
   at http://iptel.org/ser. The part below will be removed soon,
   only the manual from web will be updated.

   The Jabber server setup is not a subject of this guide. Check
   http://www.jabber.org for that.

   Useful scripts, for creating Jabber Gateway database, or for
   managing the Jabber accounts form web are located in 'doc'
   subdirectory of the module.

   Main steps of using the Jabber gateway:

     * Create the MySQL database.
     * Setup the local Jabber server.
     * Set the module parameter values in cfg file of SER, load
       the dependent modules, set up the routing rules for Jabber
       gateway.
     * Run SER.

   The administrator of SER/Jabber gateway must inform the users
   what are the aliases for Jabber/Other IM networks. Other IMs
   could be AIM, ICQ, MSN, Yahoo, and so on.

   These aliases depend on the server hostname where runs SER and
   how local Jabber server is setup.

   Next is presented a use case. Prologue:

     * SER is running on "server.org".
     * Local Jabber server is running on "jabsrv.server.org".
     * Jabber network alias (first part of "jdomain") is
       "jabber.server.org"

   The aliases for other IM networks must be the same as JID set
   in Jabber configuration file for each IM transport.

   The JIDs of Jabber transports must start with the name of the
   network. For AIM, JID must start with "aim.", for ICQ with
   "icq" (that because I use icqv7-t), for MSN with "msn." and
   for Yahoo with "yahoo.". The gateway needs these to find out
   what transport is working and which not. For our use case
   these could be like "aim.server.org", "icq.server.org",
   "msn.server.org", "yahoo.server.org".

   It is indicated to have these aliases in DNS, thus the client
   application can resolve the DNS name. Otherwise there must be
   set the outbound proxy to SER server.

   *** Routing rules for Jabber gateway First step is to
   configure SER to recognize messages for Jabber gateway. Look
   at "doc/xjab.cfg" to see a sample. The idea is to look in
   messages for destination address and if it contains Jabber
   alias or other IM alias, that means the message is for Jabber
   gateway.

   Next step is to find out what means that message for Jabber
   gateway. It could be a special message what triggers the
   gateway to take an action or is a simple message which should
   be delivered to Jabber network (using the method
   "jab_send_message").

   The special messages are for:

     * Registering to Jabber server (go online in Jabber
       network)--here must be called "jab_go_online" method.
     * Leaving the Jabber network (go offline in Jabber
       network)--here must be called "jab_go_offline" method.
     * Joining a Jabber conference room--here must be called
       "jab_join_jconf".
     * Leaving a Jabber conference room--here must be called
       "jab_exit_jconf".

   The destination address must follow the following patterns:

     * For Jabber network:
       "username<delim>jabber_server@jabber_alias".
     * For Jabber conference:
       "nickname<delim>room<delim>conference_server@jabber_alias"
       .
     * For AIM network: "aim_username@aim_alias".
     * For ICQ network: "icq_number@icq_alias".
     * For MSN network:
       "msn_username<delim>msn_server@msn_alias". msn_server can
       be "msn.com" or "hotmail.com".
     * For YAHOO network: "yahoo_username@yahoo_alias".

   Note

   "jabber_alias" is the first part of "jdomain".
     _________________________________________________________

1.3. User's Guide

   The user must activate his Jabber account associated with his
   SIP id. For each other IM network on which he wants to send
   messages, he must set an account for that IM network. The
   gateway is not able to create new account in foreign networks,
   excepting local Jabber server.

   When you want to send a message to someone in other IM
   network, you must set the destination of the message according
   with the pattern corresponding to that IM network (see last
   part of "Admin guide" chapter).

   Sending a message to user@jabber.xxx.org which is in Jabber
   network, the destination must be:
   user<delim>jabber.xxx.org@jabber_alias.

   For someone who is in Yahoo network the destination must be:
   user@yahoo_alias

   Note

   The SER administrator have to set the Jabber transports for
   each IM network in order to be able to send messages to those
   networks. The alias of each IM network can be found out from
   SER admin.

   You cannot send messages from your SIP client to your
   associated Jabber account--is something like sending messages
   to yourself.
     _________________________________________________________

1.4. Dependencies

1.4.1. SER Modules

   The following modules must be loaded before this module:

     * A database module.
     * pa (Optionally) - Presence Agent.
     * tm - Transaction Manager.
     _________________________________________________________

1.4.2. External Libraries or Applications

   The following libraries or applications must be installed
   before running SER with this module loaded:

     * Expat library.
     _________________________________________________________

1.5. Exported Parameters

1.5.1. db_url (string)

   SQL URL of database.

   Default value is "mysql://root@127.0.0.1/sip_jab". 

   Example 1-1. Set db_url parameter
...
modparam("jabber", "db_url", "mysql://username:password@host/sip_jab")
...
     _________________________________________________________

1.5.2. jaddress (string)

   IP or hostname of Jabber server -- it must be the same as the
   value from <host> tag of Jabber server config file.

   Default value is "127.0.0.1". 

   Example 1-2. Set jaddress parameter
...
modparam("jabber", "jaddress", "1.2.3.4")
...
     _________________________________________________________

1.5.3. jport (integer)

   Port number of Jabber server.

   Default value is "5222". 

   Example 1-3. Set jport parameter
...
modparam("jabber", "jport", 1234)
...
     _________________________________________________________

1.5.4. jdomain (string)

   Format: jabber.sipserver.com=<delim>. If the destination is
   for Jabber network the URI should be like:
   username<delim>jabber_server@jdomain or
   nickname<delim>roomname<delim>conference_server@jdomain

   <delim> must be a un-reserved character. By default this
   character is * . The destination will be transformed to
   username@jabber_server or roomname@conference_server/nickname
   before the message is sent to Jabber server.

   Default value is none. 

   Example 1-4. Set jdomain parameter
...
modparam("jabber", "jdomain", "jabber.sipserver.com=*")
...
     _________________________________________________________

1.5.5. aliases (string)

   Aliases for IM networks.

   Format: "N;alias1=<delim1>;...;aliasN=<delimN>;" Destinations
   like '*@aliasX' could have other format than those specified
   for Jabber network. All <delim> from user part of the
   destination address will be changed to <delimX> if the
   destination address contains <aliasX>.

   (Ex: jdomain is 'jabber.x.com=*' and msn_alias is
   'msn.x.com=%'. The destination address forM MSN Network, on
   SIP side, is like 'username*hotmail.com@msn.x.com'. The
   destination address will be transformed to
   'username%hotmail.com@msn.x.com'. 'msn.x.com' must be the same
   as the JID associated with MSN transport in Jabber
   configuration file (usually is 'jabberd.xml'))

   Default value is none. 

   Example 1-5. Set jdomain parameter
...
modparam("jabber", "aliases", "1;msn.x.com=%")
...
     _________________________________________________________

1.5.6. proxy (string)

   Outbound proxy address.

   Format: ip_address:port hostname:port

   All SIP messages generated by gateway will be sent to that
   address. If is missing, the message will be delivered to the
   hostname of the destination address

   Default value is none.

   Example 1-6. Set proxy parameter
...
modparam("jabber", "proxy", "10.0.0.1:5060 sipserver.com:5060")
...
     _________________________________________________________

1.5.7. registrar (string)

   The address in whose behalf the INFO and ERROR messages are
   sent.

   Default value is "jabber_gateway@127.0.0.1". 

   Example 1-7. Set registrar parameter
...
modparam("jabber", "registrar", "jabber_gateway@127.0.0.1")
...
     _________________________________________________________

1.5.8. workers (integer)

   Number of workers.

   Default value is 2. 

   Example 1-8. Set workers parameter
...
modparam("jabber", "workers", 2)
...
     _________________________________________________________

1.5.9. max_jobs (integer)

   Maximum jobs per worker.

   Default value is 10. 

   Example 1-9. Set max_jobs parameter
...
modparam("jabber", "max_jobs", 10)
...
     _________________________________________________________

1.5.10. cache_time (integer)

   Cache time of a Jabber connection.

   Default value is 600. 

   Example 1-10. Set cache_time parameter
...
modparam("jabber", "cache_time", 600)
...
     _________________________________________________________

1.5.11. delay_time (integer)

   Time to keep a SIP message (in seconds).

   Default value is 90 seconds. 

   Example 1-11. Set delay_time parameter
...
modparam("jabber", "delay_time", 90)
...
     _________________________________________________________

1.5.12. sleep_time (integer)

   Time between expired Jabber connections checking (in seconds).

   Default value is 20 seconds. 

   Example 1-12. Set sleep_time parameter
...
modparam("jabber", "sleep_time", 20)
...
     _________________________________________________________

1.5.13. check_time (integer)

   Time between checking the status of JabberGW workers (in
   seconds).

   Default value is 20 seconds. 

   Example 1-13. Set check_time parameter
...
modparam("jabber", "check_time", 20)
...
     _________________________________________________________

1.6. Exported Functions

1.6.1. jab_send_message()

   Converts SIP MESSAGE message to a Jabber message and sends it
   to Jabber server.

   Example 1-14. jab_send_message() usage
...
jab_send_message();
...
     _________________________________________________________

1.6.2. jab_send_message()

   Converts SIP MESSAGE message to a Jabber message and sends it
   to Jabber server.

   Example 1-15. jab_send_message() usage
...
jab_send_message();
...
     _________________________________________________________

1.6.3. jab_join_jconf()

   Join a Jabber conference--the nickname, room name and
   conference server address should be included in To header as:
   nickname%roomname%conference_server@jdomain . If the nickname
   is missing, then the SIP username is used.

   Example 1-16. jab_join_jconf() usage
...
jab_join_jconf();
...
     _________________________________________________________

1.6.4. jab_exit_jconf()

   Leave a Jabber conference--the nickname, room name and
   conference server address should be included in To header as:
   nickname%roomname%conference_server@jdomain .

   Example 1-17. jab_exit_jconf() usage
...
jab_exit_jconf();
...
     _________________________________________________________

1.6.5. jab_go_online()

   Register to the Jabber server with associated Jabber ID of the
   SIP user.

   Example 1-18. jab_go_online() usage
...
jab_go_online();
...
     _________________________________________________________

1.6.6. jab_go_offline()

   Log off from Jabber server the associated Jabber ID of the SIP
   user.

   Example 1-19. jab_go_offline() usage
...
jab_go_offline();
...
     _________________________________________________________

Chapter 2. Developer's Guide

   The module does not provide any sort of API to use in other
   SER modules.
     _________________________________________________________

Chapter 3. Frequently Asked Questions

   3.1. Where can I find more about SER?
   3.2. Where can I post a question about this module?
   3.3. How can I report a bug?

   3.1. Where can I find more about SER?

   Take a look at http://iptel.org/ser.

   3.2. Where can I post a question about this module?

   First at all check if your question was already answered on
   one of our mailing lists:

     * http://mail.iptel.org/mailman/listinfo/serusers
     * http://mail.iptel.org/mailman/listinfo/serdev

   E-mails regarding any stable version should be sent to
   <serusers@iptel.org> and e-mail regarding development versions
   or CVS snapshots should be send to <serdev@iptel.org>.


   3.3. How can I report a bug?

   Please follow the guidelines provided at:
   http://iptel.org/ser/bugs
