[Users] Re: [Devel] New module for OpenSER - Application Server interconnection

Hello everybody, I just submitted a new module, called SEAS (which stands for Sip Express Application Server). This module allows a third party to create an Application Server and connect it to OpenSER to interoperate seamlessly. This permits the Application Server to trigger actions on OpenSER, such as sending out a request, or replying a UAS transaction, in some way similarly to what can be achieved using fifo, or MI commands "t_uac_dlg" and "t_reply", but SEAS provides a much richer API to this kind of tasks. The module also allows OpenSER to notify the Application Server when requests/responses come in, and then transfer the control over the incoming request entirely to the Application Server. Furthermore, the module implements a binary protocol that transfers the SIP message along with information abouth the structure of the message's headers (ie. where each header starts, and how long it is), so the Application Server doesn't need to reparse the entire SIP message, thus improving Application Server's performance very much. The SEAS protocol also carries information about the transaction being processed at OpenSER for every message, so that the Application Server doesn't need to implement all the SIP-transaction machinery, thus actually profitting from the highly optimized TM module at OpenSER. The Application Server can be programmed in any language, because the SEAS module comunicates with it through a TCP socket. At the moment, SEAS module has been written to work with an Application Server developed by VozTelecom. It is called WeSIP and can be downloaded freely from http://www.wesip.eu . WeSIP is an implementation of the SipServlet and HttpServlet standards, so it allows a programmer to easily implement Web-Sip converged applications (such as Click2call). WeSIP is programmed entirely in Java, so you have all the tools and facilities from Java and J2EE available to program SIP applications, while already using OpenSER to process the SIP messages and transactions at the low level, thus profitting both from the high performance of OpenSER, and the high-level SIP-Application programming framework which is SipServlet and the JAVA languaje. I hope this module will help create new usage scenarios for OpenSER, allowing it to provide high-level Telephony Applications to users. The module is still in a alpha stage, but should be able for production shortly. best regards, Elias Baixas VozTelecom, Sistemas http://www.wesip.eu http://www.voztele.com _______________________________________________ Devel mailing list Devel(a)openser.org http://openser.org/cgi-bin/mailman/listinfo/devel