[Devel] discussion of roadmap for 1.3

[Klaus Darilion]

I would like to see more feature for security/stability:
- do not block during establishing new TCP/TLS connections
- do not try to establish TCP/TLS to clients behind NAT
- possibility to drop final response if there is no matching transaction
- do not block during DNS lookup

I also thought how to make openser more responsive during high 
load/blocking - e.g. openser blocks because of DNS or DB problems. Then 
we get retransmissions, the input queues get full and openser collapses. 
I first idea would be a dedicated worked thread which handles this 
overload traffic - and only this overload traffic using a dedicated 
route, e.g.

overload_route {
	append_to_reply("Retry-After: 300");
	sl_send_reply("500","Server busy");
	exit;
}

If all the worker threads are blocked for some time (e.g. >100 ms), then 
the scheduler start giving the incoming requests to the overload thread 
until the worker threads become idle again.

Any comments?

regards
klaus


Henning Westerholt wrote:
> Hello all,
> 
> i've combined the discussed roadmap items from friday. On the roadmap to 1.2 
> there were also some not finished "nice to have" items, i added them and some 
> things from the list too for discussion. :-)
> 
> From friday:
> 
> 1) tighter integration of xmpp into OpenSER, get rid of two levels of  
> addressing
> 
> 2) dialog enhancements
>   - Bogdan
> 
> 3) better diameter support
>    - Ovidiu Sas
> 
> 4) SIPS url support
>     - get rid of hard coded "sip" in modules
>     - enhance parser 
> 
> 5) replace OpenSSL with GnuTLS
>    - performance issues, GnuTLS seems two times slower then OpenSSL
>    - but GnuTLS supports more features
>    - Julien Blache announced that he wants to work on this
> 
> 6) replace integrated assembler code with system provided assembler functions
>    - Bogdan
>    - needs performance evaluation
> 
> 7) RTPProxy enhancements
>   - collaboration with existing project, or rewrite
>   - Adam Linford announced that he can perhaps provide funding for an rewrite
> 
> 8) Build system change
>   - not decided yet
>   - cmake vs. autotools
>   - Sebastien Tricaud announced that he wants to work in this
> 
> 9) OpenSER lib
>   - would probably easier with better build system and isolation of memory     
>     management
>   - Sebastien Tricaud announced that he wants to work on this
> 
> From the 1.2 roadmap:
> 
> 10) OpenSER Core
>  
>  [o] memory defragmentation
>  [o] OpenSER command line interface (terminal)
>  [o] pass socket information through fifo/unixsock
>  [o] interpret ICMP error messages
>  [o] SIP identity 
>    - in patch tracker
>  
> 11) OpenSER Modules
>  
>   [[avpops]]
>  [o] local avps - avps to be stored locally, specific per script, not per
>  transaction
>  
>   [[cpl-c]]
>  [o] replace support
>  [o] reload support
>  
>   [[dispatcher]]
>  [o] database support 
> 
>  [[uac]]
>  [o] qop authentication support
>  [o] proper CSeq value after authentication challenge
>  
>   [[usrloc]]
>  [o] possibility to attach to a contact a set of values (similar to log_extra 
> in acc)
> 
>  [[xmpp]]
>  [o] support for presence and voice
> 
> 
> I would like to add:
> 
> 12) OpenSER config reload
>   - use a new configuration without an server restart
> 
> 13) Database interface enhancements
>   - application level clustering, especially for location data
>   - needs to be discussed
>   - I would like to work on this
> 
> Cheers,
> 
> Henning
> 
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