[Freeswitch-users] SRTP Error "auth check failed"

[Helmut Kuper]

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Hello again,

I spent some more time investigating the problem. The scenario seems to
be always the same:

- -Phone A calls Phone B on PSTN (OpenZAP+Sangoma) via FS.

- -Call is established and Phone A has a (G722)SRTP connection to FS.

- -After a while (e.g. 14 minutes or 11 minutes or 10 minutes) a call
comes in for Phone A from Phone C via PSTN

- -FS tries to ring Phone A. Phone A response with "User Busy"

- -FS sends "User-Busy" via PSTN to Phone C.

- -Right after OpenZAP channel to Phone C is down, FS detects a "Error:
SRTP unprotect failed with code 7 (auth check failed)" (This happens
only if a total of 9 srtp errors occurs before)

- -Connection from Phone A to Phone B is unbridged by FS

- -PSTN-connection is disconnected with "NORMAL_CLEARING"


I analysed a time period of  5 weeks. By now I detect this problem only
for exact the scenario I described above. It seems that the problem
applies only to call durations >9-10 minutes and of course SRTP.

I'm on actual svn trunk.

regards
helmut



On 08.05.2009 11:29, Helmut Kuper wrote:
> Hello Brian,
> 
> no, during conversations calls were desconnected.
> 
> regards
> Helmut
> 
> 
> On 07.05.2009 17:09, Brian West wrote:
>> Were they on hold for a bit?
> 
>> /b
> 

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Mit freundlichen Grüßen
Helmut Kuper
Finanzdienstleistungen und Entwicklung
Telefax: (0441) 8000-2799
mailto:helmut.kuper at ewetel.de
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