[OpenSIPS-Users] OpenSIPS at SIPIT #26

[Anca Vamanu]

Hi all,

OpenSIPS was present at SIPit 26 in Stockholm and had the opportunity to 
be tested against other SIP implementations.
It was tested against some testing tools, both the proxy and the 
presence part, and no problems were found. As expected, OpenSIPS has 
proven to be stable and handle well bad formatted messages.
The registrar, location and proxy parts were tested constantly during 
the event as the server was available as a resource and used in other 
testing sessions. Again, as expected, no issues were reported. The tests 
included both IPv4 and IPv6.
Also, opensips was configured with tls support. The tests were not 
successful, but after investigating it was proven that the client did 
not implement correctly the tcp reusage draft.
The presence part was also testes, simple presence and also more complex 
features - BLA. The implementation in the client was not the standard 
one not following the draft that we follow, but used a different and 
interesting approach that we can consider to implement in opensips also. 
They defined the watched list as an RLS, applying in fact RLS for dialog 
event. The tests worked in a certain measure only after some 
customizations on both parts.
Also, we had the opportunity to test the B2BUA with some of the default 
scenarios and different actions - call transfer, call on hold and 
pickup. Everything worked well and no new issues were found in this part.
The RLS implementation had to be put to an unusual use - we tried to 
generate an RLS loop with the other RLS server present at the event. 
Since opensips is designed to prevent the loop, we didn't succeed to 
actually generate a loop. Also in the RLS part we found some problems 
that were fixed after the event.

Regards,

-- 
Anca Vamanu
www.voice-system.ro