Hi Maxim!
I haven't tested the RTCP relaying in deep but first test looks good. No ICMP error messages -> x-light doesn't get confused anymore.
Klaus
-----Original Message----- From: Maxim Sobolev [mailto:sobomax@portaone.com] Sent: Thu 11.12.2003 01:32 To: Klaus Darilion Cc: Ricardo Villa; Jan Janak; Adrian Georgescu; serusers@lists.iptel.org Subject: Patch for RTPProxy (original C version) to support RTCP I've crafted patch to support RTCP in addition to RTP, please test and let me know if it works or not. This should solve the problem with X-Lite.
http://www.portaone.com/~sobomax/rtpproxy.rtcp.diff
Thanks!
-Maxim
Klaus Darilion wrote:
Short summary:
Maxim's rtpproxy and x-light causes problems as x-light sends RTCP messages which will result in ICMP error messages as rtpproxy doesn't support RTCP. This causes x-light to create a new RTP session (new ssrc, seq-nr) and produces choppy sound.
Solutions:
use Adrians RTP proxy as it supports RTCP
extend Maxims rtpproxy to support RTCP
THE EASIEST SOLUTION: Update X-light to version build 1095. This
version ignores ICMP errors and works fine (on my PC)!
regards, Klaus
PS: nevertheless build 1095 (as 1088) is IMO buggy as it doesn't register to my default proxy, but to all other configured proxies. Any solutions?
-----Original Message----- From: Maxim Sobolev [mailto:sobomax@portaone.com] Sent: Wednesday, December 10, 2003 5:56 PM To: Ricardo Villa Cc: Klaus Darilion; Jan Janak; Adrian Georgescu; serusers@lists.iptel.org Subject: Re: [Serusers] Re: Xten-RTPProxy choppy audio
Ok, I see, probably it tries to send a RTCP packet, which is OK by itself, but handles resulting ICMP in a strange way. I'll extend RTP proxy to make it relaying RTCP traffic as well (I am having it on a TODO list for a quite some time now), which should fix this problem.
Thank you for the debugging!
In the meantime, disabling RTCP in X-Ten should solve the problem.
-Maxim
Ricardo Villa wrote:
I can confirm this too. Just tried it in our lab with the
exact same
results as Klaus. (Instead of Budgetone I used ATA186).
X-Lite build 1084
- ATA186 Calls Xten.
- Xten hears choppy audio every 5 seconds or so.
- RTP Stream from ATA to Xten is perfect and conserves
the same SSRC
- RTP Stream from Xten to ATA switches to a new SSRC
every few seconds.
It is clear to me that there is a bug in Xten software. Before Xten switches to a new SSRC it attempts to send an RTP packet to
the wrong RTP
Port (it tries to the actual port +1). SER server sends
back "ICMP Port
Unreacheable (Obviously)" and Xten restarts RTP Stream on a
new SSRC.
I did not see any problem with Maxims RTPProxy.
Regards, Ricardo
----- Original Message ----- From: "Klaus Darilion" darilion@ict.tuwien.ac.at To: "Jan Janak" janak@fokus.fraunhofer.de; "Adrian Georgescu" ag@ag-projects.com Cc: serusers@lists.iptel.org; "Ricardo Villa" ricvil@epm.net.co Sent: Wednesday, December 10, 2003 11:07 AM Subject: RE: [Serusers] Re: Xten-RTPProxy choppy audio
I can reproduce the choppy audio setup: budgetone-100 <----> ser+rtpproxy(version from today) on
redhat 9 (or 8,
not sure) <------>x-lite build 1088 on win xp
the choppy sound occours every 5 seconds, in both directions. RTP-analysis: RTP stream from budgetone to x-lite (via rtpproxy) is fine
(no jitter,
no loss) RTP stream from x-lite to budgetone (via rtpproxy): very
strange: x-lite
switches to a new SSRC (and seq-nr. start at 0 again) every
5 seconds.
so, in my opinion: rtpproxy works fine, x-lite is guilty.
but why does
this happen only if the rtp proxy is involved? ...further
investigations
are planned...
Klaus
-----Original Message----- From: Jan Janak [mailto:janak@fokus.fraunhofer.de] Sent: Wednesday, December 10, 2003 4:09 PM To: Adrian Georgescu Cc: serusers@lists.iptel.org; Ricardo Villa Subject: Re: [Serusers] Re: Xten-RTPProxy choppy audio
Well, we can generate the traces locally, but I haven't
encounter the
problem you describe so it makes no sense.
You wrote you are able to reproduce the problem, in that
case I would
like to ask you to generate the traces that show the problem so we could analyze and fix it.
Also please tell us on what OS does this happen ? (I mean the OS the proxy is running on).
Another question, what is the license of your RTP proxy ? I didn't find any licensing info in the sources. Will the sources be available ?
Jan.
On 10-12 16:04, Adrian Georgescu wrote:
On Wednesday, Dec 10, 2003, at 15:48 Europe/Amsterdam,
Ricardo Villa
wrote:
Adrian,
Do you have an Etheral trace trace of such a call (using G711)?
I guess ethereal traces can be generated with ethereal program and decoded locally on your servers if you want to isolate this.
I can decode it and produce an audio file for all to examine.
This way we
can get to the bottom of this. Thanks, Ricardo
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-
Klaus Darilion