[arm-allstar] IAX2 calltoken timestamp Message Floods - Dropping connections

[David McGough]

Hi Lawrence,

These messages are coming from a new client application which has been 
recently released.  There is a bug in how it initiates connections.

I believe this problem can be at least partly mitigated by adjusting some
parameters in your /etc/asterisk/iax.conf file. In the [general] stanza,
add:

iaxthreadcount=100
iaxmaxthreadcount=200 
maxcallnumbers=16
maxcallnumbers_nonvalidated=32


...And, restart asterisk.

73, David K4FXC

On Fri, 14 Oct 2022, "Lawrence Roney via ARM-allstar" wrote:

> On our HamVoIP Pi 4 hub we have started seeing the following in the Asterisk message log about once a week.   The IP's are typically coming from various visiting nodes connecting to the hub; not from our established club repeaters.
> 
> [Oct 14 09:18:04] WARNING[368] chan_iax2.c: Too much delay in IAX2 calltoken timestamp from address 174.195.xxx.xxx
> [Oct 14 09:18:04] WARNING[368] chan_iax2.c: Too much delay in IAX2 calltoken timestamp from address 174.195.xxx.xxx
> [Oct 14 09:18:04] WARNING[368] chan_iax2.c: Too much delay in IAX2 calltoken timestamp from address 174.195.xxx.xxx
> [Oct 14 09:18:05] WARNING[368] chan_iax2.c: Too much delay in IAX2 calltoken timestamp from address 174.195.xxx.xxx
> [Oct 14 09:18:05] WARNING[368] chan_iax2.c: Too much delay in IAX2 calltoken timestamp from address 174.195.xxx.xxx
> [Oct 14 09:18:05] WARNING[368] chan_iax2.c: Too much delay in IAX2 calltoken timestamp from address 174.195.xxx.xxx
> 
> When the message flood occurs (> 200 per second), it causes all the connections to drop.  While most permalinks reestablish, other connections need to be manually reconnected.   This appears to be a recent manifestation and not related to any observed network issues at the hub site.  Any ideas on a root cause?
> 
> We are running:
> Hamvoip Firmware Version - RPi2-3-4 Version 1.7-03 Allstar - September 12, 2022 - K4FXC
> Hamvoip Allstar Version - Asterisk 1.4.23-pre.hamvoip-V1.7.1-04 app_rpt-0.327-01/22/2022
> Linux Kernel Version - Linux version 4.19.65-1-ARCH (builduser at leming) gcc version 8.3.0 (GCC)) #1 SMP PREEMPT Fri Aug 9 23:29:04 UTC 2019
> 
> Thanks,
> 
> Lawrence - N6YFN
> Henderson Amateur Radio Club
> www.w7hen.org<http://www.w7hen.org>
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