[sr-dev] new child module for kamailio, is call "lre"

[Henning Westerholt]

Hello Mojtaba,

thank you for the update.

Just one question right now, how does your "lre" module is conceptually 
different than the already existing sipwise rtpengine module?

https://github.com/sipwise/rtpengine

This also does in-kernel forwarding for media data, is mature and 
supports many features already. You control this with the rtpengine 
Kamailio module.

(Answering also to your later reply in this thread)

Of course feel free to cancel your existing pull request if it is 
obselete by some new development. It is good to share your progress or 
questions here on the developer list, if by some reasons (e.g. vacation) 
you don't get a direct reply just send a reminder, as you already did. :-)

Cheers,

Henning

Am 24.06.19 um 13:04 schrieb Mojtaba:
> Hello Everyone,
> In the middle of developing hiops module, another child module has
> grown up. I've been developing another module for Kamailio, I called
> this "lre". It means light-rtp-engine. The concept of this module is
> using the capability of linux-Kernel packet forwarding to forward RTP
> packets between both parties in a session call.
> As far as we know, this new way has some advantage in large VoIP
> networks that are using Kamailio as Proxy or SBC. Regardless of
> transcoding, it could be done by other servers,
> By using this module, Kamailio could handle a lot of concurrent calls
> with RTP. For example in my test-bed scenario, with 2 core of CPU,
> Kamailio could handle more than 1000 concurrent calls, with no issue
> like one-way audio or etc. The consumption of resources was
> incredible. Although I countn't finish the test-bed scenario,  because
> the resources of  SIPP servers, that make the calls, were run out.
> When kamailio starts, this module tries to connect to daemon project.
> The daemon project could be running on the same server with kamailio
> or on another server. The connection between two processes is TCP/IP
> Socket. I have to use libnfnetlink library to control Linux-kernel
> forwarding on the server. This library is the low-level library for
> netfilter related kernel/userspace communication.
> Some configuration in kamailio cfg is like below:
> #!ifdef WITH_LRE
> modparam("lre", "lre_sock", "tcp:192.168.122.108:8080")
> modparam("lre", "start_port", 10000)
> modparam("lre", "end_port", 30000)
> #!endif
> In some parts of my code, I need some guides to optimize performance of my code.
> The module will be published  soon on GitHub, but for some reason I
> need to remove my old pull-request of hiops module.I will publish it
> again.

-- 
Henning Westerholt - https://skalatan.de/blog/
Kamailio services - https://skalatan.de/services