[sr-dev] Problem with Registration on pcscf

[Paul Pankhurst]

Hi Carsten, 

I'll tar up the scripts and send them across to your direct email shortly

Paul

-----Original Message-----
From: sr-dev-bounces at lists.sip-router.org
[mailto:sr-dev-bounces at lists.sip-router.org] On Behalf Of Carsten Bock
Sent: 07 February 2014 16:02
To: Kamailio (SER) - Development Mailing List
Subject: Re: [sr-dev] Problem with Registration on pcscf

Hi Hugh, Hi Paul.

any chance, that you send us your SIPP-scripts? We can test all our own
use-cases (but they work already), but in order to fix (and correctly
understand) this, we need to reproduce your problem...

Thanks,
Carsten


2014-02-06 Hugh Waite <hugh.waite at crocodile-rcs.com>:
> Hi,
> This system is using GIT master built on December 18th and has the 
> 'fallback to ip' modparam set - which is being used in this case 
> because all clients are behind a cloud based NAT.
>
> The problem occurs when there are multiple entries for a user in the 
> usrloc table, but ul.get_pcontact(...) only ever returns one. which 
> may not match the contact or the source IP/port.
>
> We believe that the multiple entries should be returned and looped 
> round to check for matches.
> Multiple entries can be easily created by disconnecting a TCP client 
> (or sipp script) without deregistering and connecting + registering 
> again from a different ephemeral port.
>
> Regards,
> Hugh
>
>
> On 05/02/2014 14:09, Carsten Bock wrote:
>>
>> Hi Paul,
>>
>> since probably i'm the guilty one, i would check. In order to quickly 
>> reproduce that issue, some quick questions:
>> - you are using GIT master? I've made some changes in GIT master 
>> (compared to 4.1) in terms of detecting, if a user is registered...
>>
>> Can you send me the SIPP-Scripts?
>> I will then check next week for this topic.
>>
>> Thanks for testing,
>> Carsten
>>
>>
>>
>> 2014-01-29 Paul Pankhurst <paul at crocodile-rcs.com>:
>>>
>>> Hi Jason,
>>>
>>>
>>>
>>> I've not done anything further on this since Friday, as I've been 
>>> busy on other things.
>>>
>>>
>>>
>>> If you have trouble reproducing it I can send you my sipp scripts 
>>> and some wireshark traces if it helps.
>>>
>>>
>>>
>>> Paul
>>>
>>>
>>>
>>>
>>>
>>> From: sr-dev-bounces at lists.sip-router.org
>>> [mailto:sr-dev-bounces at lists.sip-router.org] On Behalf Of Jason 
>>> Penton
>>> Sent: 29 January 2014 07:52
>>> To: Kamailio (SER) - Development Mailing List
>>> Subject: Re: [sr-dev] Problem with Registration on pcscf
>>>
>>>
>>>
>>> Hey Paul,
>>>
>>>
>>>
>>> Sorry for the delay on this. I had missed it. I will see if I can 
>>> re-create and get back to you. Have you maanged to do any more 
>>> testing since?
>>>
>>>
>>>
>>> Cheers
>>>
>>> Jason
>>>
>>>
>>>
>>> On Fri, Jan 24, 2014 at 5:42 PM, Paul Pankhurst 
>>> <paul at crocodile-rcs.com>
>>> wrote:
>>>
>>> I've noticed a problem with registrations on the pcscf when doing 
>>> some testing with sipp
>>>
>>> If I send in a REGISTER with SIPP followed by an INVITE calls go 
>>> through my system no problem.
>>> If I then stop the sipp script and run it again, I find that 
>>> although the registration succeeds, subsequent INVITES are rejected 
>>> telling me that I have not registered!
>>> If I unregister at the end of my script everything is fine, and the 
>>> problem goes away after the original REGISTRATION times out, so this 
>>> led me to think that we had a problem with multiple registrations 
>>> entries in the system.
>>>
>>> The problem seems to be a result of the fact that sipp always places 
>>> the same ip address and port number on the contact line when using 
>>> tcp connections.
>>>
>>> I've had a look through the code and believe that we are getting 
>>> multiple entries in the usrloc hash table in this scenario, and 
>>> ul_get_pcontact only ever returns the first one which causes 
>>> pcscf_is_registered to incorrectly report that the UE is not 
>>> registered.
>>>
>>> Paul
>>>
>>> _______________________________________________
>>> sr-dev mailing list
>>> sr-dev at lists.sip-router.org
>>> http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-dev
>>>
>>>
>>>
>>>
>>> _______________________________________________
>>> sr-dev mailing list
>>> sr-dev at lists.sip-router.org
>>> http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-dev
>>>
>>
>>
>
>
> --
> Hugh Waite
> Principal Design Engineer
> Crocodile RCS Ltd.
>
>
>
> _______________________________________________
> sr-dev mailing list
> sr-dev at lists.sip-router.org
> http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-dev



--
Carsten Bock
CEO (Geschäftsführer)

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