meetings:berlin-2010-minutes

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====== Developers' Meeting, Berlin 2010 ======

FhG FOKUS Berlin
June 8, 2010

This is the summary of **SIP Express Router (SER) and Kamailio developers meeting**, held on the 8th of June 8, 2010, at FhG FOKUS in Berlin.

Number of participants: 16

===== Main Topics =====

  - SIP SIMPLE Presence
  - New in development version
  - Management of next major release - 3.1.0
  - Review of evolution so far and future development
==== SIP SIMPLE presence ====

  * Inaki Baz Castillo
    * update about IETF specs, pretty much pessimism regarding scalability and interoperability as well as future development of the current specs
    * so far they look good only for services inside same provider
    * OMA and RCS bring new specs on top of IETF, but mostly focused on IMS area
    * summary of other presence and im systems: msn and xmpp
    * a potential new presence specification from scratch trying to learn from the best of what is out there.
  * Daniel-Constantin Mierla
    * update about embedded XCAP server committed in GIT repository
    * transport layer works for http/1.0
    * the http/2.0 chunked needs some coding in the core
    * not yet full implementation of XCAP requirements


==== New in development ====

About the things planned to be finished before 3.1.0 and updates from related projects.
  * other new features are already completed - not the subject of this discussion, see them at:
    * http://sip-router.org/wiki/features/new-in-devel


  * Andrei Pelinescu-Onciul
    * update about asynchronous TLS
      * code in a special branch, to be merge to master after some extra testing
      * it reuses TCP async options, thus avoiding potential conflicts
    * reason support for local CANCELs and E2E CANCELs (received CANCELs)
      * pretty much done
      * not merged yet because no documentation was written
    * raw UDP socket support
      * dedicated branch for now, targeting to boost UDP communication performances by avoiding some kernel limitations
      * usage is configurable by script
      * in the future can be reused for icmp support
      * Marius volunteered for testing and reporting as the time allows.
    * allow expressions in function parameters
      * allowing expressions in function parameters for functions that have no fixups or use the pre-defined fixups
      * part of NG module interface
      * yet to be decided if to be pushed in 3.1 or the other next release (3.2)
  * Henning Westerholt
    * some new modules might be pushed in public repository before 3.1
  * Timo Reimann
    * work on dialog module to be split in enhancements to current architecture for 3.1
    * major re-factoring as discussed on mailing lists for 3.2
  * Daniel-Constantin Mierla
    * finish work started for modules
      * dispatcher - load balancing
        * weight based distribution donw, next is call load distribution
      * debugger - interactive config file debugging
        * more user friendly output
      * xhttp - embedded HTTP server
        * http/1.0 done
        * support for handling received chuncked body as in http/2.0
      * xcap_server - embedded XCAP server
        * works now with xhttp and sip transport layers
        * next work is to complete XCAP specs, making K/S full featured embedded SIMPLE presence server - no external components to be needed anymore
      * app_lua
        * review of dynamic PV usage potential issues
        * export more internal api to lua
  * Dragos Vingarzan
    * openimscore module should work out of the box with sip router core
  * Bogdan Pintea
    * updates about binrpc and patches to sercmd
  * Marius Zbihlei
    * Integration of kamctl/sercmd - work so far, futures steps
    * CFG framework integration in upcoming Kamailio 3.1.
    * Status of a unified statistics framework between K and S
  * Stefan Sayer
    * status of GSoC2010 project for SEMS and Kamailio Presence Server
    * SEMS 1.2.x is out - SIP signaling b2bua and media server

==== Next release ====


  * the set of new features is very impressive
    * http://sip-router.org/wiki/features/new-in-devel
  * some modules need to be merged to ease further integration
    * top list: sl, auth, rr
  * next release to have a single stable branch
  * freezing probably mid of July or a bit later to allow fair completion of started work
  * target date for release
    * September, probably to second part of it
    * more precise date to be set at freezing time
  * discussion whether to make it a LTS release
    * the usual official support cycle is 1.5 - 2 years anyhow

==== Review of evolution so far and the future development ====

  * integration process
    * successfully completed for 3.0.0 - apart of seas which has now needed patches
    * next is merging more modules that provide same functionality, main focus on non-db modules
  * feedback for 3.0
    * very good
    * the new features are very attractive
    * very solid version, reported issues haven't exceeded a normal major release case
    * work effort for 3.0 and new features already done for 3.1 => the project offers a strong and reliable development team
    * first half of 2010 had good coverage of the project to various events
  * project devel resources are pretty much centralized under sip-router.org domain
  * there is always space for better docs, plans to improve them to be summarized separately
  * some ideas about what 3.2 should get flowed around, besides new dialog and presence server work
  * participation to other events is already booked for second part of the year
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