Re: [OpenSIPStack] OpenSBC terminate connection

[Andre M. <an...@ma...>]

Hi Joegen,

my tests against the latest CVS version were successfull. Calls are 
properly terminated now - we do not see ghost connections anymore.
Many thanks for the help and the quick fix.

Andre

jo...@op... schrieb:
> Andre,
> 
> If it's not much trouble.  Please provide level 5 log and wireshark 
> capture from the sbc box.
> 
> Joegen
> 
> André Mamitzsch wrote:
>> Hello Joegen,
>>
>> I have tested against the latest CVS version, 1.1.5-27, still no 
>> success. The softswitch still responds with a "400 Bad Request".
>>
>> Regards,
>>
>> Andre
>>
>> jo...@op... schrieb:
>>   
>>> Andre,
>>>
>>> This is a known problem area in OpenSBC.  Since we are a B2BUA and not a 
>>> proxy we terminate our dialogs based on successful processing of a BYE 
>>> request.  OpenSBC does not wait for a final response before it destroys 
>>> connections.  This ensures that the SBC does not end up with ghost 
>>> sessions as well if a certain UA is not able to handle authenticated BYE 
>>> requests.  This is the second time I have received this report regarding 
>>> this problem.  Can you provide me a with a level 5 log for this 
>>> problematic call offlist?  I'll see if an easy workaround is possible.  
>>> If you could, please also attach a wire shark capture of the successful 
>>> call you made using a UA directly calling your softswitch.  My e-mail 
>>> address is jo...@op...
>>>
>>> Joegen
>>>
>>> André Mamitzsch wrote:
>>>     
>>>> Hello,
>>>>
>>>> I have seen a strange behavior with the OpenSBC1.1.5RC1. The scenario is 
>>>> as follows:
>>>>
>>>> The OpenSBC is configured in B2BUAUpperReg mode.
>>>>
>>>> I place a call from a SIP client (A) to a PSTN Phone (B). The connection 
>>>> is established whithout any problems. A goes on hook and sends a BYE to 
>>>> which the SBC immediately replies with a 200 OK.
>>>>
>>>> Another BYE message is being sent out to the softswitch platform.
>>>>
>>>> The softswitch challenges authentication and therefore responds with a 
>>>> 401  unauthorized message. Since the SBC, at least that's my assumption, 
>>>> has already successfully terminated the internal connection there is no 
>>>> match and the requested authenticated BYE will never be send out. This 
>>>> behavior results in ghost connections and the billing runs until B goes 
>>>> on-hook as well.
>>>>
>>>> I have tested the same scenario with my SIP client directly connected to 
>>>> our softswitch platform and did not detect the problem there. Upon 
>>>> receiving the 401 unauthorized message, the client resends the BYE 
>>>> containing the authentication information.
>>>>
>>>> I have checked the RFC 3261 this morning and tried to find out whether 
>>>> it is a regular behavior to reply to a BYE message with authentication 
>>>> challenge or not. I could not find any hint there.
>>>>
>>>> How difficult is it to change this behavior and wait for confirmation 
>>>> before terminating the entire connection ?
>>>>
>>>> Regards,
>>>>
>>>> Andre
>>>>
>>>>
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