[Serusers] Re: Patch for RTPProxy (original C version) to support RTCP

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: 1. use Adrians RTP proxy as it supports RTCP 2. extend Maxims rtpproxy to support RTCP 3. 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(a)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 >> >> 1. ATA186 Calls Xten. >> 2. Xten hears choppy audio every 5 seconds or so. >> 3. RTP Stream from ATA to Xten is perfect and conserves > > the same SSRC > >> 4. 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" >> &lt;darilion(a)ict.tuwien.ac.at&gt; >> To: "Jan Janak" &lt;janak(a)fokus.fraunhofer.de&gt;de>; "Adrian Georgescu" >> &lt;ag(a)ag-projects.com&gt; >> Cc: &lt;serusers(a)lists.iptel.org&gt;rg>; "Ricardo Villa" &lt;ricvil(a)epm.net.co&gt; >> 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(a)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 >>>> >>>> _______________________________________________ >>>> Serusers mailing list >>>> serusers(a)lists.iptel.org >>>> http://lists.iptel.org/mailman/listinfo/serusers >>> >>> _______________________________________________ >>> Serusers mailing list >>> serusers(a)lists.iptel.org >>> http://lists.iptel.org/mailman/listinfo/serusers >>> >>> >> >> >> >> >> >> _______________________________________________ >> Serusers mailing list >> serusers(a)lists.iptel.org >> http://lists.iptel.org/mailman/listinfo/serusers >> >> >> > > >