[SR-Users] Intermittent delays relaying BYE (up to 1s)

[Daniel-Constantin Mierla]

First, most of the module functions return negative or positive integer
values, not boolean. You have to check with <0 for what's usually false
in native kamailio.cfg if conditions and >0 for true.

Then, also double check it does not execute it via a different config
path, like the branch route callback (which happens in the default
native kamailio.org).

Cheers,
Daniel

On 31.08.22 12:00, Lewis Hutchinson wrote:
>
> Ok so making progress but still a little confused, hopefully this
> forum can shed some light on this behaviour.
>
> Using the hints provided (thanks all so far) and the latency logging
> from the cookbook I have managed to isolate the issue down to
> RTPengine introducing the delay.
>
> INFO: app_python3 [apy_kemi.c:1820]: sr_apy_kemi_exec_func(): alert -
> action KSR.rtpengine.rtpengine_manage(...) took too long [1003089 ms]
> (file:(null) func:(null) line:252)
>
> What is confusing is, I don’t believe this block should be being called.
>
> when the BYE is triggered, it routes to ksr_route_withindlg
>
>         # handle requests within SIP dialogs
>
>         if self.ksr_route_withindlg(msg)==-255 :
>
>             return 1
>
>
> from within the ksr_route_withindlg a check is done to see if any
> RTPengine work needs doing
>
>     # Handle requests within SIP dialogs
>
>     def ksr_route_withindlg(self, msg):
>
>         if KSR.siputils.has_totag()<0 :
>
>             return 1
>
>  
>
>         # RTPEngine handling for UPDATES & reINVITES with sdp
>
>         if self.ksr_route_rtpengine(msg) == -255:
>
>             return 1
>
>
> RTPengine is configured in a way to step in whenever there is an SDP
> present based on Content-Type: application/sdp
>
>     # RTPengine handle anything with SDP
>
>     def ksr_route_rtpengine(self, msg):
>
>         if KSR.textops.has_body_type("application/sdp"):
>
>            KSR.rtpengine.rtpengine_manage(
>
>                "RTP/AVP replace-session-connection replace-origin
> ICE=remove")
>
>  
>
>         return 1
>
>
> What I can understand is why is this being called and erroring
> introducing the delay when there is no Content-Type: application/sdp
> in a BYE ???
>
>
> As a quick fix I have put this in which stops the problem (I am sure
> there is better ways to handle this but for now this works in a DEV
> environment)
>
>     def ksr_route_rtpengine(self, msg):
>
>         if KSR.is_BYE():
>
>            return 1
>
>  
>
>         if KSR.textops.has_body_type("application/sdp"):
>
>            KSR.rtpengine.rtpengine_manage(
>
>                "RTP/AVP replace-session-connection replace-origin
> ICE=remove")
>
>  
>
>         return 1
>
> Can anyone see why this would occur? Why is sr_apy_kemi_exec_func():
> alert - action KSR.rtpengine.rtpengine_manage(...) even being called
> for this BYE ? when there is no Content-Type: application/sdp
>
>
>
> Lewis
>
>  
>
>  
>
>  
>
>
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-- 
Daniel-Constantin Mierla -- www.asipto.com
www.twitter.com/miconda -- www.linkedin.com/in/miconda
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