Table of Contents
List of Examples
db_url parameterdb_table parameterhttpProxy_host parameterhttpProxy_port parameterpurple_send_message usagepurple_handle_publish usagepurple_handle_subscribe usageTable of Contents
Purple module is a multi-protocol instant-messaging gateway module which use libpurple, the library that Pidgin (ex-gaim) is based on.
This plugin was written as a proof of concept gateway between SIP and MSN/Live networks. As libpurple is written to code multi-protocol graphic IM clients, it provides a high level API in order to manipulate accounts, contacts, contacts lists, conversations and more.
This module provides a multi-protocol IM/Presence client running inside Kamailio with an account for each protocol used by each SIP user. libpurple is designed for a graphic client for only one user.
It's no really adapted to a production environment with a huge user count but can be used in order to demonstrate the concept or in a SOHO environment.
By default, there's some undefined symbol errors with libpurple shared object when using it inside Kamailio. To solve it, you have to force preload of the library by setting up LD_PRELOAD environment variable.
Before starting Kamailio use (adapt the path to your environment):
export LD_PRELOAD=$LD_PRELOAD:/usr/local/lib/libpurple.so
Limitations: doesn't implement authorization requests from external accounts to SIP.
The following modules must be loaded before this module:
presence*.
pua.
database driver module (db_mysql, ...).
The database is used to map SIP URIs with external accounts (eg. MSN).
Example 1.1. Database table description
... +----------+------------------+------+-----+---------+----------------+ | Field | Type | Null | Key | Default | Extra | +----------+------------------+------+-----+---------+----------------+ | id | int(10) unsigned | NO | PRI | NULL | auto_increment | | sip_user | varchar(128) | NO | | NULL | | | ext_user | varchar(128) | NO | | NULL | | | ext_prot | varchar(16) | NO | | NULL | | | ext_pass | varchar(64) | YES | | NULL | | +----------+------------------+------+-----+---------+----------------+ ...
The meaning of columns:
sip_user: user's SIP URI.
ext_user: user's external account login.
ext_prot: purple plugin id to use, except for gtalk.
ext_pass: user's external account password.
Example 1.2. Database sample records
... +----+------------------+-----------------+----------------+----------+ | id | sip_user | ext_user | ext_prot | ext_pass | +----+------------------+-----------------+----------------+----------+ | 1 | sip:alice@domain | alice@live.com | prpl-msn-pecan | password | | 2 | sip:bob@domain | bob@live.com | prpl-msn-pecan | password | | 3 | sip:alice@domain | alice@gmail.com | gtalk | password | | 4 | sip:bob@domain | bob@gmail.com | gtalk | password | +----+------------------+-----------------+----------------+----------+ ...
Example 1.3. MySQL create script
... CREATE TABLE purplemap ( id INT UNSIGNED PRIMARY KEY NOT NULL AUTO_INCREMENT, sip_user VARCHAR(128) NOT NULL, ext_user VARCHAR(128) NOT NULL, ext_prot VARCHAR(16) NOT NULL, ext_pass VARCHAR(64) ); ...
The URL to connect to database.
Default value is “mysql://openserro:openserro@localhost/openser”.
Example 1.4. Set db_url parameter
...
modparam("purple", "db_url", "dbdriver://username:password@dbhost/dbname")
...
Database table name.
Default value is purplemap.
Send message to a purple destination.
This function can be used from REQUEST_ROUTE.
Example 1.8. purple_send_message usage
...
if (is_method("MESSAGE")) {
xlog("MESSAGE $ru from [$fu] to [$tu]\n");
if (uri !~ "sip:.+@.+;proto=.+") {
purple_send_message();
sl_send_reply("202", "Accepted");
}
}
...
Handle PUBLISH to a purple destination.
This function can be used from REQUEST_ROUTE.
Example 1.9. purple_handle_publish usage
...
if(is_method("PUBLISH")) {
xlog("PUBLISH $ru from [$fu] to [$tu]\n");
if (uri !~ "sip:.+@.+;proto=.+")
purple_handle_publish();
}
...