This module exports the $uuid(type) class of variables that return unique values using functions from the libuuid library. UUIDs are used in the +sip.instance media feature tag in SIP, but can also be used for other purposes, like defining a unique session ID for a group of SIP dialogs.

2. Dependencies

2.1. Kamailio Modules

The following modules must be loaded before this module:

none.

2.2. External Libraries or Applications

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

libuuid - OSSP uuid - Universally Unique Identifier (UUID) Library

3. Usage

The following variables can be used:

$uuid(g) - return the UUID value using uuid_generate().
$uuid(r) - return the UUID value using uuid_generate_random().
$uuid(t) - return the UUID value using uuid_generate_time().
$uuid(s) - return the UUID value using uuid_generate_time_safe(). If the generation was not safe, the variable returns $null. The function is not available on Mac OS X - the value is the one returned by uuid_generate_time().

Example 1.1. $uuid(type) usage

...
$var(uuid) = $uuid(g);
xdbg("generated uuid is [$var(uuid)]\n");
add_rr_param(";uuid=$var(uuid)");
...