Todays task, I had to port it into an earlier version for a legacy version test.
From: Daniel-Constantin Mierla <miconda(a)gmail.com>
Sent: 06 May 2020 10:53
To: Chris Martineau <Chris.Martineau(a)semafone.com>om>; Kamailio (SER) - Users Mailing
List <sr-users(a)lists.kamailio.org>
Subject: Re: [SR-Users] PRACK support in RTPENGINE module?
Have you had the chance to do any testing? It will help deciding to push the commit to
branch 5.3 for the release of 5.3.4.
Cheers,
Daniel
On 05.05.20 09:55, Chris Martineau wrote:
Thanks Daniel,
Will test and advise.
Chris
From: sr-users
<sr-users-bounces@lists.kamailio.org><mailto:sr-users-bounces@lists.kamailio.org>
On Behalf Of Daniel-Constantin Mierla
Sent: 04 May 2020 19:09
To: Kamailio (SER) - Users Mailing List
<sr-users@lists.kamailio.org><mailto:sr-users@lists.kamailio.org>
Subject: Re: [SR-Users] PRACK support in RTPENGINE module?
I pushed a patch to rtpengine module to handle PRACK in both manage()
and answer() functions.
Chris: can you test and see if works as expected? If yes, it will be
backported.
Cheers,
Daniel
On 04.05.20 19:51, Alex Balashov wrote:
Oh, sorry. I misread; it seemed to me that
rtpengine_answer1_f() was
part of a cascade of fixup functions that goes back to
rtpengine_manage(), but not to _answer(). You're right of course.
On Mon, May 04, 2020 at 07:49:19PM +0200, Daniel-Constantin Mierla wrote:
Hello,
Chris mentioned that rtpengine_answer() is also not supporting (or is
ruling out all request types but ACK), so the C code is limiting in both
cases, no matter using rtpengine_manage() or rtpengine_answer().
The rtpengine manage() was built as a wrapper around offer()/answer()
and it makes the decision of which one is executed in various cases
(request/reply/failure route), but not what offer()/answer() functions
do internally.
So in this case the code has to allow execution for PRACK, it was an
omission, likely not a scenario that popped up so far.
Cheers,
Daniel
On 04.05.20 19:22, Alex Balashov wrote:
Hello Chris,
rtpengine_manage() is just a wrapper that makes context-sensitive
invocations of rtpengine_offer() and rtpengine_answer(), so that you
don't have to choose which of them to call manually. But it's not
perfect.
There are nevertheless situations where this manual use of the
offer/answer functions is necessary, and it sounds like this is one of
them.
There is a larger question of whether rtpengine_manage() should support
PRACK; it seems like the answer is yes. But this lacking cannot be
framed as "RTPEngine doesn't support PRACK" or anything like that.
RTPEngine can support any SDP-bearing request and reply, since RTPEngine
does not care about SIP semantics per se.
-- Alex
--
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