[SR-Users] RTPengine + kernel module long call RTP drops

[Anthony Joseph Messina]

On Wednesday, April 5, 2017 2:24:12 PM CDT Richard Fuchs wrote:
> On 05/04/17 02:53 PM, Anthony Joseph Messina wrote:
> > On Wednesday, April 5, 2017 8:55:36 AM CDT Richard Fuchs wrote:
> >> On 04/04/2017 09:33 PM, Anthony Joseph Messina wrote:
> >>> After more digging, I see (from the Asterisk perspective) that after a
> >>> certain amount of time, the "RTCP report" size gets smaller and this is
> >>> the point at which the audio from Asterisk back to the softphone is
> >>> dropped.  Again, this audio drop occurred around 19 minutes into the
> >>> call.
> >>> 
> >>> I'm not sure this means anything, but perhaps it can point someone more
> >>> knowledgeable in the right direction.
> >> 
> >> A good place to start is to inspect /proc/rtpengine/0/list and check the
> >> packet and byte counters for the respective local ports. This way you
> >> can check if incoming packets are actually arriving at rtpengine.
> > 
> > Thanks, Richard. I am amidst a call right now which shows it's kernelized.
> > The output from cat /proc/rtpengine/0/list shows nothing changing
> > throughout the call (after repeating the command).
> 
> That means your iptables rule isn't effective. Packets don't get
> delivered to the RTPENGINE iptables target. That doesn't explain audio
> stopping but that's the first thing you should fix.

You are correct about that.  firewalld inserts

-A INPUT -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT

as the first rule in the INPUT chain, so it never got to my

-A INPUT_direct -p udp -m udp -j RTPENGINE --id 0

The following works at least for the kernel module part...
firewall-cmd --permanent --direct --passthrough ipv4 -I INPUT -p udp -m udp -j 
RTPENGINE --id 0

firewall-cmd --permanent --direct --passthrough ipv6 -I INPUT -p udp -m udp -j 
RTPENGINE --id 0

-- 
Anthony - https://messinet.com/ - https://messinet.com/~amessina/gallery
F9B6 560E 68EA 037D 8C3D  D1C9 FF31 3BDB D9D8 99B6
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