[OpenSIPS-Users] opensips script route confusion

[Vlad Paiu]

Hello,

1) Yes, the main route block is always executed for SIP requests.
2) The t_on_branch gets executed only once for each outgoing branch - 
thus you can do different processing per each individual branch.
3) Correct
5) If a transaction was initiated by an INVITE request then the same 
transaction also includes ACK, only if the final response was negative.
6) You should take a look at the OpenSIPS webinars - 
http://www.opensips.org/Documentation/Webinars#toc7 - they contain both 
introduction to SIP and basic OpenSIPS scripting.

Best Regards,

Vlad Paiu
OpenSIPS Developer
http://www.opensips-solutions.com

On 31.08.2013 13:14, Bogdan Chifor wrote:
> Hello,
>
> I would like to know better the opensips script routes, but i cannot 
> find any resources that answer my questions completely.
>
> Here are my questions:
>
> 1.)When a request arrives the commands from the route main block are 
> always executed?
>
> 2.) What is the purpose of the t_on_branch? Why can't I simply call 
> for instance route(1) (which is like a function)? Aren't they similar?
>
> 3.) I understood that a transaction contains a SIP request and all the 
> replies to that request and a transaction is uniquely idenbtified by 
> the branch ID tag? Am i right?
>
> 4.) When a reply arrives the commands from the onreply_route main 
> block are always executed, and only after these commands are executed 
> the onreply_route[1] is called (if it was set previously with 
> t_on_branch)?
>
> 5.) A SIP transaction can contain multiple requests? Can you give me 
> an example?
>
> 6.) Where can I find a more detailed documentation on the opensips 
> script (with examples which are explained)?
>
> Any help would be very appreciated.
>
> Thank you,
>
> Chifor Bogdan
>
>
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