24 Oct
2018
24 Oct
'18
8:49 a.m.
I was looking at the sdpops_mod.c code hoping that there was an easy way to remove a
sess_version (Session Description Protocol Version (v): 0) structure, but there does not
appear to be that functionality in that module. It might be a bit of work to remove a
duplicate sess_version line.
I am using Kamailio 5.1, does anyone know if this is an issue in later versions?
Thank you,
-Steve
24 Oct
24 Oct
8:51 a.m.
I think you've crawled down that rabbit hole about two millennia
prematurely. There is a much simpler explanation for why you're getting
a duplicated SDP stanza - in the logic of your route script. It's not a
bug in Kamailio.
I can't tell you exactly what the cause is, but I believe this avenue of
exploration will prove fruitful. It's a fairly common problem.
On Wed, Oct 24, 2018 at 12:49:55PM +0000, Wilkins, Steve wrote:
I was looking at the sdpops_mod.c code hoping that
there was an easy way to remove a sess_version (Session Description Protocol Version (v):
0) structure, but there does not appear to be that functionality in that module. It might
be a bit of work to remove a duplicate sess_version line.
I am using Kamailio 5.1, does anyone know if this is an issue in later versions?
Thank you,
-Steve
_______________________________________________
Kamailio (SER) - Users Mailing List
sr-users(a)lists.kamailio.org
https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
--
Alex Balashov | Principal | Evariste Systems LLC
Tel: +1-706-510-6800 / +1-800-250-5920 (toll-free)
Web: http://www.evaristesys.com/, http://www.csrpswitch.com/
8:58 a.m.
Could you tell me what type of calls could cause this in a route script. I just do see
what I could be doing to generate that. It only happens with rtpengine is enabled.
Thank you.
-----Original Message-----
From: sr-users <sr-users-bounces(a)lists.kamailio.org> On Behalf Of Alex Balashov
Sent: Wednesday, October 24, 2018 8:51 AM
To: Kamailio (SER) - Users Mailing List <sr-users(a)lists.kamailio.org>
Subject: Re: [SR-Users] Double Session Description Protocol Version (v) 0 data when using
rtpengine
I think you've crawled down that rabbit hole about two millennia prematurely. There is
a much simpler explanation for why you're getting a duplicated SDP stanza - in the
logic of your route script. It's not a bug in Kamailio.
I can't tell you exactly what the cause is, but I believe this avenue of exploration
will prove fruitful. It's a fairly common problem.
On Wed, Oct 24, 2018 at 12:49:55PM +0000, Wilkins, Steve wrote:
I was looking at the sdpops_mod.c code hoping that
there was an easy way to remove a sess_version (Session Description Protocol Version (v):
0) structure, but there does not appear to be that functionality in that module. It might
be a bit of work to remove a duplicate sess_version line.
I am using Kamailio 5.1, does anyone know if this is an issue in later versions?
Thank you,
-Steve
_______________________________________________
Kamailio (SER) - Users Mailing List
sr-users(a)lists.kamailio.org
https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
--
Alex Balashov | Principal | Evariste Systems LLC
Tel: +1-706-510-6800 / +1-800-250-5920 (toll-free)
Web: http://www.evaristesys.com/, http://www.csrpswitch.com/
_______________________________________________
Kamailio (SER) - Users Mailing List
sr-users(a)lists.kamailio.org
https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
9:01 a.m.
More generally, Steve, responding to some themes I see in your posts
over the past few months:
You have a habit of posting overblown speculations about problems and
painting yourself into grossly overcomplicated interpretations that send
you down spurious paths of troubleshooting.
I think you need to seriously ponder Occam's Razor:
https://en.wikipedia.org/wiki/Occam%27s_razor
If you're running into an unexpected phenomenon, why do you assume it's
a bug in Kamailio or a "de novo" problem? In fact, a little Googling
will reveal that double SDP stanzas are a common question.
https://lists.kamailio.org/pipermail/sr-users/2015-August/089538.html
The simplest explanation is almost ALWAYS the correct one. Yes,
occasionally it is possible to find a true, honest-to-god original bug
in the product -- we all have. But it is not the explanation you should
start with, nor one you should readily leap to, because it requires a
lot more assumptions, so probabilistically, it is almost always the
wrong theory.
Consider it in terms of thermodynamics, mathematics, and the complexity
introduced by additional moving parts if you like:
If you see an unexplained flash of light, there are numerous possible
explanations. Some are quite simple: optical-neurological phenomenon,
reflection from the mirror of a passing car, etc. Some are extremely
complicated and involve novel, unproven ideas in physics or cosmology.
"Hey, what was that flash of ligth?"
Which should you start with FIRST? Think about it critically ...
-- Alex
On Wed, Oct 24, 2018 at 08:51:12AM -0400, Alex Balashov wrote:
I think you've crawled down that rabbit hole about
two millennia
prematurely. There is a much simpler explanation for why you're getting
a duplicated SDP stanza - in the logic of your route script. It's not a
bug in Kamailio.
I can't tell you exactly what the cause is, but I believe this avenue of
exploration will prove fruitful. It's a fairly common problem.
On Wed, Oct 24, 2018 at 12:49:55PM +0000, Wilkins, Steve wrote:
--
Alex Balashov | Principal | Evariste Systems LLC
Tel: +1-706-510-6800 / +1-800-250-5920 (toll-free)
Web: http://www.evaristesys.com/, http://www.csrpswitch.com/
I was looking at the sdpops_mod.c code hoping
that there was an easy way to remove a sess_version (Session Description Protocol Version
(v): 0) structure, but there does not appear to be that functionality in that module. It
might be a bit of work to remove a duplicate sess_version line.
I am using Kamailio 5.1, does anyone know if this is an issue in later versions?
Thank you,
-Steve
_______________________________________________
Kamailio (SER) - Users Mailing List
sr-users(a)lists.kamailio.org
https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
--
Alex Balashov | Principal | Evariste Systems LLC
Tel: +1-706-510-6800 / +1-800-250-5920 (toll-free)
Web: http://www.evaristesys.com/, http://www.csrpswitch.com/
_______________________________________________
Kamailio (SER) - Users Mailing List
sr-users(a)lists.kamailio.org
https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
9:35 a.m.
Thank for your insight and honesty Alex! I do appreciate feedback as it helps us
grow...no matter our age.
-----Original Message-----
From: sr-users <sr-users-bounces(a)lists.kamailio.org> On Behalf Of Alex Balashov
Sent: Wednesday, October 24, 2018 9:01 AM
To: Kamailio (SER) - Users Mailing List <sr-users(a)lists.kamailio.org>
Subject: Re: [SR-Users] Double Session Description Protocol Version (v) 0 data when using
rtpengine
More generally, Steve, responding to some themes I see in your posts over the past few
months:
You have a habit of posting overblown speculations about problems and painting yourself
into grossly overcomplicated interpretations that send you down spurious paths of
troubleshooting.
I think you need to seriously ponder Occam's Razor:
https://en.wikipedia.org/wiki/Occam%27s_razor
If you're running into an unexpected phenomenon, why do you assume it's a bug in
Kamailio or a "de novo" problem? In fact, a little Googling will reveal that
double SDP stanzas are a common question.
https://lists.kamailio.org/pipermail/sr-users/2015-August/089538.html
The simplest explanation is almost ALWAYS the correct one. Yes, occasionally it is
possible to find a true, honest-to-god original bug in the product -- we all have. But it
is not the explanation you should start with, nor one you should readily leap to, because
it requires a lot more assumptions, so probabilistically, it is almost always the wrong
theory.
Consider it in terms of thermodynamics, mathematics, and the complexity introduced by
additional moving parts if you like:
If you see an unexplained flash of light, there are numerous possible explanations. Some
are quite simple: optical-neurological phenomenon, reflection from the mirror of a passing
car, etc. Some are extremely complicated and involve novel, unproven ideas in physics or
cosmology.
"Hey, what was that flash of ligth?"
Which should you start with FIRST? Think about it critically ...
-- Alex
On Wed, Oct 24, 2018 at 08:51:12AM -0400, Alex Balashov wrote:
I think you've crawled down that rabbit hole about
two millennia
prematurely. There is a much simpler explanation for why you're
getting a duplicated SDP stanza - in the logic of your route script.
It's not a bug in Kamailio.
I can't tell you exactly what the cause is, but I believe this avenue
of exploration will prove fruitful. It's a fairly common problem.
On Wed, Oct 24, 2018 at 12:49:55PM +0000, Wilkins, Steve wrote:
--
Alex Balashov | Principal | Evariste Systems LLC
Tel: +1-706-510-6800 / +1-800-250-5920 (toll-free)
Web: http://www.evaristesys.com/, http://www.csrpswitch.com/
_______________________________________________
Kamailio (SER) - Users Mailing List
sr-users(a)lists.kamailio.org
https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
I was looking at the sdpops_mod.c code hoping
that there was an easy way to remove a sess_version (Session Description Protocol Version
(v): 0) structure, but there does not appear to be that functionality in that module. It
might be a bit of work to remove a duplicate sess_version line.
I am using Kamailio 5.1, does anyone know if this is an issue in later versions?
Thank you,
-Steve
_______________________________________________
Kamailio (SER) - Users Mailing List
sr-users(a)lists.kamailio.org
https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
--
Alex Balashov | Principal | Evariste Systems LLC
Tel: +1-706-510-6800 / +1-800-250-5920 (toll-free)
Web: http://www.evaristesys.com/, http://www.csrpswitch.com/
_______________________________________________
Kamailio (SER) - Users Mailing List
sr-users(a)lists.kamailio.org
https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
2259
days inactive
2259
days old
4 comments
2 participants
participants (2)
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Alex Balashov -
Wilkins, Steve