unixodbc Module

Marco Lorrai

   abbeynet.it

Edited by

Marco Lorrai

   Copyright © 2005, 2006 Marco Lorrai
   Revision History
   Revision $Revision: 5901 $ $Date$
     __________________________________________________________

   Table of Contents

   1. Admin Guide

        1.1. Overview
        1.2. Dependencies

              1.2.1. OpenSIPS Modules
              1.2.2. External Libraries or Applications

        1.3. Exported Parameters

              1.3.1. auto_reconnect (int)
              1.3.2. use_escape_common (int)

        1.4. Exported Functions
        1.5. Installation and Running

              1.5.1. Installing
              1.5.2. Configuring and Running

   2. Developer Guide

   List of Examples

   1.1. Set the “auto_reconnect” parameter
   1.2. Set the “use_escape_common” parameter

Chapter 1. Admin Guide

1.1. Overview

   This module allows to use the unixodbc package with OpenSIPS.
   It have been tested with mysql and the odbc connector, but it
   should work also with other database. The auth_db module works.

   For more information, see the http://www.unixodbc.org/ project
   web page.

   To see what DB engines can be used via unixodbc, look at
   http://www.unixodbc.org/drivers.html.

1.2. Dependencies

1.2.1. OpenSIPS Modules

   The following modules must be loaded before this module:
     * No dependencies on other OpenSIPS modules.

1.2.2. External Libraries or Applications

   The following libraries or applications must be installed
   before running OpenSIPS with this module loaded:
     * None.

1.3. Exported Parameters

1.3.1. auto_reconnect (int)

   Turns on or off the auto_reconnect mode.

   Default value is “1”, this means it is enabled.

   Example 1.1. Set the “auto_reconnect” parameter
...
modparam("db_unixodbc", "auto_reconnect", 0)
...

1.3.2. use_escape_common (int)

   Escape values in query using internal escape_common() function.
   It escapes single quote ''', double quote '"', backslash '\',
   and NULL characters.

   You should enable this parameter if you know that the ODBC
   driver considers the above characters as special (for marking
   begin and end of a value, escape other characters ...). It
   prevents against SQL injection.

   Default value is “0” (0 = disabled; 1 = enabled).

   Example 1.2. Set the “use_escape_common” parameter
...
modparam("db_unixodbc", "use_escape_common", 1)
...

1.4. Exported Functions

   NONE

1.5. Installation and Running

1.5.1. Installing

   Prerequirement: you should first install unixodbc (or another
   program that implements the odbc standard, such iodbc), your
   database, and the right connector. Set the DSN in the odbc.ini
   file and the connector drivers in the odbcinst.ini file.

1.5.2. Configuring and Running

   In the opensips.conf file, add the line:
....
loadmodule "/usr/local/lib/opensips/modules/db_unixodbc.so"
....

   You should also uncomment this:
....
loadmodule "/usr/local/lib/opensips/modules/auth.so"
loadmodule "/usr/local/lib/opensips/modules/auth_db.so"
modparam("usrloc", "db_mode", 2)
modparam("auth_db", "calculate_ha1", yes)
modparam("auth_db", "password_column", "password")
....

   and setting the DSN specified in the odbc.ini, inserting this
   with the url adding this line:
....
modparam("usrloc|auth_db", "db_url",
    "unixodbc://opensips:opensipsrw@localhost/my_dsn")
....

   replacing my_dsn with the correct value.

   HINT: if unixodbc don't want to connect to mysql server, try
   restarting mysql server with:
shell>safe_mysqld --user=mysql --socket=/var/lib/mysql/mysql.sock

   The connector search the socket in /var/lib/mysql/mysql.sock
   and not in /tmp/mysql.sock

Chapter 2. Developer Guide

   The module implements the OpenSIPS DB API, in order to be used
   by other modules.
