31 Aug
2022
31 Aug
'22
1 p.m.
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
31 Aug
31 Aug
1:21 p.m.
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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www.twitter.com/miconda -- www.linkedin.com/in/miconda
1:39 p.m.
Thanks Daniel, I have looked at that so many times and not noticed the missing > 0 and
because it always looped RTPengine in I didn't see anything out of place...
I did check the path it executed with debug logging which led me to this point, so I am
happy I am on top of the issue
Again, thanks for your help. I will let you know if this resolves the issues.
Lewis
2:40 p.m.
Thanks for everyone's help on this, it turns out it was something as simple as a
missing > 0 in the code which caused the below and sometimes resulted in noticeable
delay / BYE retransmission. I suspect this would have caused issues for any within dialog
messages with no SDP so glad it is resolved now.
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)<file://(null)> func:(null) line:252)
Thanks for the help tracking this down, it was proving a bit of a pain but a fresh pair of
eyes can see things familiar ones sometimes cannot.
Lewis
From: Daniel-Constantin Mierla <miconda(a)gmail.com>
Sent: 31 August 2022 11:21
To: Kamailio (SER) - Users Mailing List <sr-users(a)lists.kamailio.org>rg>; Lewis
Hutchinson <lewis.hutchinson(a)missionlabs.co.uk>
Subject: Re: [SR-Users] Intermittent delays relaying BYE (up to 1s)
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)<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
__________________________________________________________
Kamailio - Users Mailing List - Non Commercial Discussions
* sr-users@lists.kamailio.org<mailto:sr-users@lists.kamailio.org>
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*
https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users<https://eur…
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--
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814
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814
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3 comments
2 participants
participants (2)
-
Daniel-Constantin Mierla -
Lewis Hutchinson