[OpenSER-Users] best response seems wrong.

[Klaus Darilion]

I guess somehow the message gets looped to the proxy again:

Take a look at the topmost Via header of the relayed PUBLISH. At the end 
you see .1 and .2. This measn the .1 branch and the .2 branch. Where is 
the .0 branch?

I guess it is lopped back to openser (via loopback interface) and is 
rejected with 407.

Try "ngrep -d any" or "tcpdump -i any" to see loopback too!

regards
klaus

Aymeric Moizard schrieb:
> 
> 
> 
> On Wed, 16 Jan 2008, Bogdan-Andrei Iancu wrote:
> 
>> Hi Aymeric,
>>
>> could you describe the message flow (requests and replies)? I 
>> understand you do parallel forking to 2 clients that return 5xx 
>> replies, but where the 407 comes from??
> 
> I was about to send the capture:
> 
> http://antisip.antisip.com/publish-issue.pcap
> 
> Put the filter "sip contains 77622" to view the incoming
> transaction + the 2 outgoing transactions. 2 501 are received
> and one 407 is sent back. There is no incoming 407 that comes
> to openser.
> 
> I have to admit that the call flow is strange, because my openser 
> forwards the PUBLISH sent by a user to himself. (I don't have presence 
> server) The second strange thing is that the same softphone is registred 
> twice on the same IP... However, this demonstrates the issue.
> 
> In case, there is only ONE binding for the user, the 501 is forwarded 
> correctly...
> 
> To reproduce the error:
> My softphone:
> http://sip.antisip.com/download/emansip-setup/emansip-setup-v411-rc10.exe
> Create an account first on:
> http://sip.antisip.com/
> 
> I'm currently modifying my softphone to send 405, hoping that will fix
> the issue... However, it would still be nice to solve it.
> 
> tks for your effort,
> Aymeric
> 
>> regards,
>> bogdan
>>
>> Iñaki Baz Castillo wrote:
>>> On Wednesday 16 January 2008 14:58:22 Aymeric Moizard wrote:
>>>
>>>> (sorry: just repost to follow correct thread/subjet)
>>>>
>>>> I just found another  example from rfc3261 where an endpoint will 
>>>> use 5xx
>>>> class answer:
>>>>
>>>> 12.2.2 UAS Behavior
>>>>
>>>> Page 76:
>>>>
>>>>     If the remote sequence number is empty, it MUST be set to the value
>>>>     of the sequence number in the CSeq header field value in the 
>>>> request.
>>>>     If the remote sequence number was not empty, but the sequence 
>>>> number
>>>>     of the request is lower than the remote sequence number, the 
>>>> request
>>>>     is out of order and MUST be rejected with a 500 (Server Internal
>>>>     Error) response.
>>>>
>>>> Hope I convinced you!
>>>>
>>>
>>> Yes ;)
>>>
>>>
>>> So the question here is why OpenSer is replying 407. But it's so 
>>> strange...
>>>
>>>
>>
>>