Hello,

the pseudo-variable and transformation framework in core has been completed for upcoming v1.5.0 of Kamailio (OpenSER). The core has now only API to register, parse name, evaluate and set values for PV&T.

All specific implementations have moved to PV module: http://kamailio.org/docs/modules/devel/pv.html

The current architecture provides a flexible way to enhance the number PV&T available in config file without affecting the stability and the performance of core and main modules. As this number increased a lot, and will grow more, the API changed the indexing from a list to a hash table, offering faster lookup and quicker shorter up time.

With this work done, a new functionality is available for developers: - they can export new transformations from their module. As example, check the pv or textops (new transformation to be announced in separate message) modules. The system is simple, you have to implement a function to parse the name of transformation and its parameter, plus a function to evaluate a transformation.

Now core got some clean up, not that fat anymore, implementation of about 100 pseudo-variables and over 30 transformations was moved out (couple of thousands lines of code). This work is part of the efforts to increase the stability, performance and flexibility of the core, so that specific implementations do not affect typical use cases.

As final note, remember to load the pv module from now on if you work with/need old core pseudo-variables or transformations.

Cheers, Daniel