[OpenSER-Users] Openser Transaction State Machine

[Henning Westerholt]

On Monday 28 April 2008, Aadilkhan Maniyar wrote:
> We are in the process of evaluating the architecture of OpenSER for a
> local deployment. For this purpose I was looking at the State Machine
> implemented in OpenSER.
> More specifically I am looking at the state machine related to the
> INVITE transaction.
>
> In order to know the State machine, what files do I have to look at? Can
> anyone please guide me.
>
> Has the state machine been documented at some place, so that I can read
> about it?

Hello Aadilkhan,

i don't know what exactly do you mean with 'state machine'. You need to 
implement your handling of SIP messages in the config script. There is no 
pre-defined handling for example for INVITE messages. 

The server core does not that much about the handling of SIP messages, most of 
the logic is implemented in modules. For the transactional logic take a look 
at the source code of the 'tm' module. There exists also a module to 
implement dialog awareness, thus the source code of 'dialog' could also be 
interesting for you.

To get an idea about the mechanism of the config script, just take a look at 
the default configuration that is shipped with the server.

Cheers,

Henning