[OpenSIPS-Users] rtpengine errors: can't send command to a RTP proxy (22:Invalid argument)

Fri Jun 26 13:35:54 EST 2020

Hello Razvan,

On ubuntu we have a failure for more then 1024 buffers. There is something
defined in some experimental headers (as __IOV_MAX), but the IOV_MAX define
is not visible in the rtpengine module.

And yes, there is an extra buffer. I guess the length of that extra buffer
was zero and that’s why it didn’t create issues. But as soon as I
concatenated the buffer, the issue showed up and I had an extra trailing
string at the end of the rtpengine command that was sent on the wire.
After reducing  the number of buffers by one, all was good on both
scenarios: sending with and without concatenated buffers.
I will prepare a fix for it and push it.

-ovidiu

On Fri, Jun 26, 2020 at 03:55 Răzvan Crainea <razvan at opensips.org> wrote:

> Hi, Ovidiu!
>
> So you're saying that the IOV_MAX is not explicitly defined, but it does
> fail after 1024 buffers, correct? If so, perhaps we should limit the
> number of buffers to 1024, if not already defined.
> I did notice the extra vcnt as well, but I though that was related to
> the fact that it allocates one extra iovec (at the headr) for the
> cookie, and sometime uses it, sometime doesn't. Nevertheless, it is
> consistent on both cases, UNIX & UDP, both have that vcnt + 1. Now I
> haven't checked whether this is correct or not, could you please confirm?
>
> Best regards,
>
> Răzvan Crainea
> OpenSIPS Core Developer
> http://www.opensips-solutions.com
>
> On 6/26/20 2:29 AM, Ovidiu Sas wrote:
> > It looks like the hidden IOV_MAX is set to 1024 in debian.
> > I tested a patch and all looks good.
> > It seems that there is an error in the code: writev has the wrong
> > number of iovcnt (should be one less).
> > I tested and all looks ok (the code in rtpproxy.c has the proper iovcnt).
> >
> > -ovidiu
> >
> > On Thu, Jun 25, 2020 at 1:03 PM Ovidiu Sas <osas at voipembedded.com>
> wrote:
> >>
> >> We will need to add a param to control the max number of buffers.
> >>
> >> -ovidiu
> >>
> >> On Thu, Jun 25, 2020 at 1:02 PM Ovidiu Sas <osas at voipembedded.com>
> wrote:
> >>>
> >>> It seems that when we have more than roughly 1000 buffers, the send
> fails.
> >>>
> >>> -ovidiu
> >>>
> >>> On Wed, Jun 24, 2020 at 8:54 AM Ovidiu Sas <osas at voipembedded.com>
> wrote:
> >>>>
> >>>> Hello Razvan,
> >>>>
> >>>> The system is a debian buster one.
> >>>> I patched the code:
> >>>> #ifdef IOV_MAX
> >>>>      LM_NOTICE("IOV_MAX=[%d]\n", IOV_MAX);
> >>>> #else
> >>>>      LM_NOTICE("no IOV_MAX\n");
> >>>> #endif
> >>>>
> >>>> and I get:
> >>>> NOTICE:rtpengine:send_rtpe_command: no IOV_MAX
> >>>> in the logs.
> >>>>
> >>>> Then I patched the code again to check how many buffers are being
> used:
> >>>> The max so far was 73:
> >>>> LM_NOTICE("writev(rtpe_socks[node->idx], v , %d)\n", vcnt + 1);
> >>>> got me:
> >>>> NOTICE:rtpengine:send_rtpe_command: writev(rtpe_socks[node->idx], v ,
> 73)
> >>>>
> >>>> I will continue to monitor the system to see if there is a correlation
> >>>> between the error and the number of buffers.
> >>>>
> >>>> Thanks,
> >>>> Ovidiu
> >>>>
> >>>> On Wed, Jun 24, 2020 at 1:59 AM Răzvan Crainea <razvan at opensips.org>
> wrote:
> >>>>>
> >>>>> Hi, Ovidiu!
> >>>>>
> >>>>> I doubt this is a problem of OpenSIPS version, but rather of the OS
> you
> >>>>> are running on. I suspect that error comes from the fact that the
> bson
> >>>>> resulted has more than IOV_MAX elements, which if I recall correctly
> it
> >>>>> was 15 on some OSes.
> >>>>> We had a similar problem in rtpproy[1], where we had merged the
> buffers
> >>>>> in a single one just to pass over this limitation. Could you check if
> >>>>> you are facing a similar issue?
> >>>>>
> >>>>> [1]
> >>>>>
> https://github.com/OpenSIPS/opensips/blob/master/modules/rtpproxy/rtpproxy.c#L2031
> >>>>>
> >>>>> Răzvan Crainea
> >>>>> OpenSIPS Core Developer
> >>>>> http://www.opensips-solutions.com
> >>>>>
> >>>>> On 6/24/20 7:32 AM, Ovidiu Sas wrote:
> >>>>>> This is happening also on the latest 3.0.
> >>>>>> The weird thing is that opensips doesn't send anything to rtpengine.
> >>>>>> The first opensips/rtpengine exchange on the initial INVITE works
> ok,
> >>>>>> but the opensips/rtpengine exchange on the 200ok fails (no command
> is
> >>>>>> sent by opensips - confirmed by running ngrep on the loopback
> >>>>>> interface).
> >>>>>> On the next call, the initial offer works fine, but the answer fails
> >>>>>> due to no command issued by opensips.
> >>>>>>
> >>>>>> version: opensips 3.0.2 (x86_64/linux)
> >>>>>> flags: STATS: On, DISABLE_NAGLE, USE_MCAST, SHM_MMAP, PKG_MALLOC,
> >>>>>> Q_MALLOC, F_MALLOC, HP_MALLOC, DBG_MALLOC, FAST_LOCK-ADAPTIVE_WAIT
> >>>>>> ADAPTIVE_WAIT_LOOPS=1024, MAX_RECV_BUFFER_SIZE 262144, MAX_LISTEN
> 16,
> >>>>>> MAX_URI_SIZE 1024, BUF_SIZE 65535
> >>>>>> poll method support: poll, epoll, sigio_rt, select.
> >>>>>> git revision: 3a8f6f137
> >>>>>> main.c compiled on 09:36:42 Jun 22 2020 with gcc 9
> >>>>>>
> >>>>>> -ovidiu
> >>>>>>
> >>>>>>
> >>>>>> On Wed, Jun 10, 2020 at 2:49 PM Ovidiu Sas <osas at voipembedded.com>
> wrote:
> >>>>>>>
> >>>>>>> Hello all,
> >>>>>>>
> >>>>>>> I'm running opensips 3.1.0-beta (latest version) and experiencing
> >>>>>>> connectivity issues to the rtpengine daemon running on the same
> host:
> >>>>>>> ERROR:rtpengine:send_rtpe_command: can't send command to a RTP
> proxy
> >>>>>>> (22:Invalid argument)
> >>>>>>> ERROR:rtpengine:send_rtpe_command: timeout waiting reply from a
> RTP proxy
> >>>>>>> ERROR:rtpengine:send_rtpe_command: proxy <udp:127.0.0.1:2223>
> does not
> >>>>>>> respond, disable it
> >>>>>>> ERROR:rtpengine:rtpe_function_call: no available proxies
> >>>>>>>
> >>>>>>> After an opensips restart, everything comes to normal.
> >>>>>>> I was running previously opensips 3.1.0-dev and everything was
> working fine.
> >>>>>>>
> >>>>>>> The issue starts showing up after a few days with very little
> traffic.
> >>>>>>> Is there anyone experiencing this issue?
> >>>>>>>
> >>>>>>>
> >>>>>>> Thanks,
> >>>>>>> Ovidiu
> >>>>>>>
> >>>>>>> --
> >>>>>>> VoIP Embedded, Inc.
> >>>>>>> http://www.voipembedded.com
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>
> >>>>> _______________________________________________
> >>>>> Users mailing list
> >>>>> Users at lists.opensips.org
> >>>>> http://lists.opensips.org/cgi-bin/mailman/listinfo/users
> >>>>
> >>>>
> >>>>
> >>>> --
> >>>> VoIP Embedded, Inc.
> >>>> http://www.voipembedded.com
> >>>
> >>>
> >>>
> >>> --
> >>> VoIP Embedded, Inc.
> >>> http://www.voipembedded.com
> >>
> >>
> >>
> >> --
> >> VoIP Embedded, Inc.
> >> http://www.voipembedded.com
> >
> >
> >
>
> _______________________________________________
> Users mailing list
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>
-- 
VoIP Embedded, Inc.
http://www.voipembedded.com
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