[OpenSER-Devel] [ openser-Patches-1748544 ] New LDAP module

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Patches item #1748544, was opened at 2007-07-05 11:26
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Category: modules
Group: ver devel
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Christian Schlatter (cschlatter)
Assigned to: Nobody/Anonymous (nobody)
Summary: New LDAP module

Initial Comment:
This new LDAP module implements an LDAP search interface for OpenSER. It exports script functions to perform an LDAP search operation and to store the search results as OpenSER AVPs. This allows for using LDAP directory data in the OpenSER SIP message routing script.

The following features are offered by the LDAP module:

  * LDAP search function taking an LDAP URL as input
  * LDAP result parsing functions to store LDAP data as AVP
  * Support for accessing multiple LDAP servers
  * LDAP SIMPLE authentication
  * LDAP server failover and automatic reconnect
  * Configurable LDAP connection and bind timeouts
  * Module API for LDAP search operations that can be used by other OpenSER modules

The module implementation makes use of the open source OpenLDAP library available on most UNIX/Linux platforms. Besides LDAP server failover and automatic reconnect, this module can handle multiple LDAP sessions concurrently allowing to access data stored on different LDAP servers. Each OpenSER worker process maintains one LDAP TCP connection per configured LDAP server. This enables parallel execution of LDAP requests and offloads LDAP concurrency control to the LDAP server(s).

An LDAP search module API is provided that can be used by other OpenSER modules. A module using this API does not have to implement LDAP connection management and configuration, while still having access to the full OpenLDAP API for searching and result handling.

Since LDAP server implementations are optimized for fast read access they are a good choice to store SIP provisioning data. Performance tests have shown that this module achieves lower data access times and higher call rates than other database modules like e.g. the OpenSER MYSQL module.

The code was tested with openser svn trunk and 1.2 branch.

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